1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 Use fewer forks & execs for sending many messages to a single host.
9 By passing back more info from the transport to the delivery process,
10 we can loop there. A two-phase queue run will benefit, particularly for
11 mailinglist and smarthost cases.
13 JH/02 Add transaction support for hintsdbs. The providers supported are tdb and
14 sqlite. Transactions are used for the wait-transport and retry DBs.
15 They imply locking internal to the DB. We no longer need a separate
16 lockfile, can keep the DB handle open for extended periods, yet
17 potentially benefit from concurrency on non-conflicting record uses.
19 JH/03 With dkim_verify_minimal, avoid calling the DKIM ACL after the first
22 JH/04 Remove the docs and support scripts dealing with conversion of Exim
23 version 3 installations.
25 JH/05 Fix hintsdb support for dbmjz when compiled using sqlite3. Previously
26 the backend support assumed keys would be simple C strings, but dbmjz
27 uses keys with embedded NUL bytes. The builtin hintsdb use is unaffected,
28 but installations using dbmjz will need to rebuild those DBs.
30 JH/06 Bug 1141: When operating a continued-connection transport, verify that
31 the interface option, if specified, evaluates to match the connection.
32 Previously, a queued message for the same host was sent without checking.
34 JH/07 Bug 3106: Fix coding in SPA authenticator. A macro argument was not
35 properly parenthesized, resulting in a logic error. While the simple
36 fix was provided by Andrew Aitchison, the over-large code block resulting
37 from this macro made me want to replace it with a real function so more
38 extensive rework becamse needed.
40 JH/08 The output of "exim -bV" now includes lookup types built as dynamic-load
43 JH/09 Not a change, but worthy of note: There is no test coverage of the
44 heimdall-gssapi authenticator driver. It does build, though with (on at
45 least one platform) library version conflicts with the gsasl auth
46 driver). Confidence in its operation is lacking.
48 JH/10 Bug 3108: On platforms not providing strchrnul() [OpenBSD] supply a proper
49 prototype (as well as implementaton). Previously, a return type "int"
50 was assumed, resulting in type-conversion bugs when int and pointer had
51 different size. This resulted in crashes while processing DKIM signatures
52 of received messages. Identification and fix from Qualys Security.
54 JH/11 Lookups built as dynamic-load modules which support a single lookup
55 type are now only loaded if required by the config. Previously all lookup
56 modules present in the modules directory were loaded; this now applies
57 only to those supporting multiple types.
59 JH/12 Bug 3112: Fix logging of config-file position for "obsolete lookup
60 syntax". Previously, the end of the top-level file was reported.
62 JH/13 Bug 3120: Fix parsing of DKIM pubkey DNS record. Previously a crafted
63 record could crash the meesage recieve process. Investigation by
66 JH/14 Bug 3116: Fix crash in dkim signing. On kernels supporting immutable
67 memory segments, a write was done into one when a constant string was
68 configured for a transport's dkim private key.
70 JH/15 Disallow tainted metadata in lists.
71 - Change-of-separator prefixes are handled specially when they are
72 explicit text; only the remainder of the list is expanded. A change-of-
73 separator resulting from expansion will not take effect if tainted.
74 - Elements starting with a plus-sign (named-list inclusion,
75 case-interpretation etc) and (hostlist) @[] (et al) are not handled
76 specially and are still operative at this time - but warnings are logged;
77 if any of these are needed in a list with a tainted element (which taints
78 the entire list at string-expansion time) then a named-list can be used
80 - Exclamation-marks ("!" signifying negation) are not checked for taint
86 JH/01 Support list of dkim results in the dkim_status ACL condition, making
87 it more usable in the data ACL.
89 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
90 Previously This was only logged, on the assumption that errors would be
91 seen for a previous fflush(). However, a fuse filesystem has been
92 reported as showing this an error for the fclose(). The spool is now in
93 an uncertain state, and we have logged and responded acceptance. Change
94 this to respond with a temp-reject, wipe spoolfiles, and log the error
97 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
98 during a recipient verify callout, a QUIT command was attempted on the
99 now-closed callout channel, causing a paniclog entry.
101 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
102 a connection_reject log_selector, under tls_on_connect. Previously
103 with this combination, when the connect ACL rejected, a spurious
104 paniclog entry was made.
106 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
107 of loadbalancer-detection for resumption, in 4.96 - which tries to
108 use the EHLO response. SMTPS does not have one at the time it is starting
109 TLS. Change the default for the smtp transport host_name_extract option
110 to be a static string, for TLS-on-connect cases; meaning that resumption
111 will always be attempted (unless deliberately overriden).
113 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
114 chunk-separator specification. This was broken by hardening introduced
117 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
118 included the -H with the id; this also messed up exiqgrep.
120 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
121 was not properly skipped and empty elements would cause mis-parsing.
122 Tighten parsing of DKIM header records. Previously, all but lowercase
123 alpha chars would be ignored in potential tag names.
125 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
126 being searched. Previously we only had one for IPv4 addresses. Per the
127 documentation, the error results by default in a no-match result for the
128 list. It is logged if the unknown_in_list log_selector is used.
130 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
131 the routing operation. Previously it would silently stop routing the
134 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
135 info-request event close in time to a scheduled run timer could result in
136 the latter being missed, and no further queue scheduled runs being
137 initiated. This ouwld be more likely on high-load systems.
139 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
140 LF-only mode (as detected from the first header line). Previously we did
141 accept that in (normal) CRLF mode; this has been raised as a possible
142 attack scenario (under the name "smtp smuggling").
144 JH/13 Add an fdatasync call for the received message data file in spool, before
145 loggging reception and sending the SMTP ack. Previously we only flushed
146 the stdio buffer so there was still the possibility of a disk error.
148 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
149 address. Previously, for the last address in a header line (commonly
150 there is only one) the terminating newline was part of the logged
153 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
154 header, when parsing for address-qualification. Previously one was only
155 written if there were rewrite rules.
157 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
160 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
161 the multiple-queue-runners facility for 4.97 broke this, giving only a
162 one-time run of the queue.
164 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
167 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
168 TLS session resulted in a forced-fail, a misleading error was logged for
169 the expansino of tls_certificates. This would affect the common case of
170 that option being set (main-section options) but not having any variable
171 parts. It could also potentially affect tls_privatekeys. The underlyding
172 coding errors go back to 4.90 but were only exposed in 4.97.
174 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
175 pcre2 library starting allocating 20kB rather than 112 bytes per match
176 call, which broke the 2GB total limitation on Exim's memory management
177 when a user had over 104207 messages stored and the appendfile
178 maildir_quota_directory_regex option is in use. Release the allocated
179 memory every thosand files to avoid this.
180 The same issue arises with the ACL regex condition, which is applied
181 to every line of a received message.
183 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
184 which all recipients had been handled (itself an issue) a null-pointer
185 deref was done on trying to write a retry record. Fix that by counting
186 the outstanding recipients before trying to transmit the message.
187 The situation arose for a second MX try within a transport run, when the
188 first had perm-rejected a recipient (the only one for the connection, in
189 the case seen) during pipelining, and then closed the TCP connection.
190 The transport classified that as an I/O error, leaving the message
191 outstanding but having marked up the recipient as dealt-with. It then
192 tried another MX because of the I/O error. Fix this by converting the
193 message-level status to ok if there was a close but all recipients were
194 dealt with. Thanks to Wolfgand Breyha for debug runs.
196 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
197 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
199 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
201 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
202 option specified a fixed address, later rewriting on that address would
203 trip on the configuration data being readonly. Instead of modifying
204 in-place, copy data. Found and fixed by Peter Benie.
206 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
207 data a null pointer was followed. Find and testcase by Sebastian Bugge.
209 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
210 decimal 127 chars were not encoded, and lowercase hex was used for
211 encoded values. Outstanding since at least 1999.
213 JH/27 Fix crash in logging. When a message with a large number of recipients
214 had been received, and logging of recipients is enabled, the buffer used
215 for logging could reach limit. A read using a null pointer would then
216 be done, resulting in a crash of the receiving process before an SMTP
217 ACK for the message was returned to the sending system. Duplicate
218 messages were created as a result.
219 Find and debug help by Mateusz Krawczyk
221 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
222 DB, wrapping transport record bare-ip "host names" and ipv6
223 "host addresses" in square-brackets. This makes the parsing that
224 exinext does more reliable.
226 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
229 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
231 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
232 ipv6 addresses for the sender. Previously the uncompressed form was used,
233 and if used in textual form this would result in behavior difference
236 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
237 now classed as a protocol error and subject to smtp_max_synprot_errors.
239 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
240 ".." and has following characters.
242 JH/34 Fix delivery ordering for 2-phase queue run combined with
245 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
246 Previously the $mime_filename variable would have an incorrect value.
247 While in the code, extend coverage to name= which previously was only
248 supported for single parameters, despite also filling in $mime_filename.
254 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
255 SMTP connection" log lines.
257 JH/02 Option default value updates:
258 - queue_fast_ramp (main) true (was false)
259 - remote_max_parallel (main) 4 (was 2)
261 JH/03 Cache static regex pattern compilations, for use by ACLs.
263 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
264 Make the rewrite never match and keep the logging. Trust the
265 admin to be using verify=header-syntax (to actually reject the message).
267 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
268 (under Linux) we watch the dir containing the final file; previously
269 it would be the dir with the first symlink. We still do not monitor
272 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
273 dn_expand() is happy to pass them through.
275 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
276 the file with the proof had an unchanged name, the new proof(s) were
277 loaded on top of the old ones (and nover used; the old ones were stapled).
279 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
280 more than one message arrived in a single connection a reference from
281 the earlier message could be re-used. Often a sigsegv resulted.
282 These variables were introduced in Exim 4.87.
283 Debug help from Graeme Fowler.
285 JH/09 Fix ${filter } for conditions that modify $value. Previously the
286 modified version would be used in construction the result, and a memory
289 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
290 Find and fix by Jasen Betts.
292 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
293 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
294 the systemwide configuration to override the Exim config.
296 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
297 API changes in libopendmarc.
299 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
300 pid 1, in the normal "background daemon" mode, having to drop process-
301 group leadership also lost track of needing to create listener sockets.
303 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
304 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
306 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
307 a capture group which obtained no text (eg. "(abc)*" matching zero
308 occurrences) could cause a segfault if the corresponding $<n> was
311 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
312 included a close-brace character (eg. it itself used an expansion) an
315 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
316 starting TLS. Previously it was after, meaning that attackers on such
317 ports had to be screened using the host_reject_connection main config
318 option. The new sequence aligns better with the STARTTLS behaviour, and
319 permits defences against crypto-processing load attacks, even though it
320 is strictly an incompatible change.
321 Also, avoid sending any SMTP fail response for either the connect ACL
322 or host_reject_connection, for TLS-on-connect ports.
324 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
325 Previously this was not permitted, but it makes reasonable sense.
326 While there, restore a restriction on using it from a connect ACL; given
327 the change JH/16 it could only return false (and before 4.91 was not
330 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
331 was exactly sized compared to the log buffer, a crash occurred with the
332 misleading message "bad memory reference; pool not found".
333 Found and traced by Jasen Betts.
335 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
336 dns_again_means_nonexist included an element causing a DNS lookup which
337 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
338 included (though probably not limited to) a process crash from stack
339 memory limit, or from excessive open files. Replace this with a paniclog
340 whine (as this is likely a configuration error), and returning
343 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
344 this always failed, probably leading to the usual downgrade to in-clear
347 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
348 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
349 to not checking that list for these lookups.
351 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
354 JH/23 Fix crash in string expansions. Previously, if an empty variable was
355 immediately followed by an expansion operator, a null-indirection read
356 was done, killing the process.
358 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
359 include an SMTP response string which is longer than that supported
360 by the delivering transport. Alleviate by wrapping such lines before
363 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
364 chars (RFC limit). Previously a limit of 12 items was made, which with
365 a not-impossible References: in the message being bounced could still
366 be over-large and get stopped in the transport.
368 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
369 close. Previously a bare socket close was done.
371 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
374 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
375 message being considered for delivery was already being handled by
376 another process, and having an SMTP connection already open, the function
377 to close it tried to use an uninitialized variable. This would afftect
378 high-volume sites more, especially when running mailing-list-style loads.
379 Pollution of logs was the major effect, as the other process delivered
380 the message. Found and partly investigated by Graeme Fowler.
382 JH/29 Change format of the internal ID used for message identification. The old
383 version only supported 31 bits for a PID element; the new 64 (on systems
384 which can use Base-62 encoding, which is all currently supported ones
385 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
386 and must use Base-36). The new ID is 23 characters rather than 16, and is
387 visible in various places - notably logs, message headers, and spool file
388 names. Various of the ancillary utilities also have to know the format.
389 As well as the expanded PID portion, the sub-second part of the time
390 recorded in the ID is expanded to support finer precision. Theoretically
391 this permits a receive rate from a single comms channel of better than the
393 The major timestamp part of the ID is not changed; at 6 characters it is
394 usable until about year 3700.
395 Updating from previously releases is fully supported: old-format spool
396 files are still usable, and the utilities support both formats. New
397 message will use the new format. The one hints-DB file type which uses
398 message-IDs (the transport wait- DB) will be discarded if an old-format ID
399 is seen; new ones will be built with only new-format IDs.
400 Optionally, a utility can be used to convert spool files from old to new,
401 but this is only an efficiency measure not a requirement for operation
402 Downgrading from new to old requires running a provided utility, having
403 first stopped all operations. This will convert any spool files from new
404 back to old (losing time-precision and PID information) and remove any
405 wait- hints databases.
407 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
408 we treated them as item separators when parsing for a list item, but they
409 need to be protected by the doublequotes. While there, add handling for
412 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
413 Found and fixed by Jasen Betts. No testcase for this as my usual text
414 editor insists on emitting only valid UTF-8.
416 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
417 a null-indirection SIGSEGV for the receive process.
419 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
420 -bh use. Internal checking would spot this and take a panic.
422 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
423 In 4.96 this would expand to empty.
425 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
426 certificate. Find and fix by Andreas Metzler.
428 JH/36 Add ARC info to DMARC hostory records.
430 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
431 or fakedefer. Previously the sender could discover that the message
432 had in fact been accepted.
434 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
435 sequences. Previously the input was not noted as being tainted; notably
436 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
437 bad coding of authenticators.
439 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
440 and ${tr...}. Found and diagnosed by Heiko Schlichting.
442 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
443 could be triggered by externally-supplied input. Found by Trend Micro.
446 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
447 be triggered by externally-controlled input. Found by Trend Micro.
450 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
451 be triggered by externally-controlled input. Found by Trend Micro.
454 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
455 Make the rewrite never match and keep the logging. Trust the
456 admin to be using verify=header-syntax (to actually reject the message).
458 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
461 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
467 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
468 after reception to before a subsequent reception. This should
469 mean slightly faster delivery, and also confirmation of reception
472 JH/02 Move from using the pcre library to pcre2. The former is no longer
473 being developed or supported (by the original developer).
475 JH/03 Constification work in the filters module required a major version
476 bump for the local-scan API. Specifically, the "headers_charset"
477 global which is visible via the API is now const and may therefore
478 not be modified by local-scan code.
480 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
481 sendfile() didi not account for the way the ClamAV driver code called it.
483 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
484 time check was being done for every character; replace that with one
487 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
488 sent was prefixed with a length byte.
490 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
491 RFC 5321. Previously Dovecot (at least) would log errors during
494 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
495 in 4.61 without a reason logged. Binaries will be bigger, which might
496 matter on diskspace-constrained systems, but debug is easier.
498 JH/09 Fix macro-definition during "-be" expansion testing. The move to
499 write-protected store for macros had not accounted for these runtime
500 additions; fix by removing this protection for "-be" mode.
502 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
503 handing out large-numbered file descriptors, violating the usual Unix
504 assumption (and required by Posix) that the lowest possible number will be
505 allocated by the kernel when a new one is needed. In the daemon, and any
506 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
507 are not useable for FD_SET() [and hence select()] and overwrite the stack.
508 Assorted crashes happen.
510 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
511 main-section options or in a connect ACL, the value from the first ever
512 connection was never replaced for subsequent connections. Found by
515 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
516 though only once PCRE2 was introduced: the memory accounting used under
517 debug offset allocations by an int, giving a hard trap in early startup.
518 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
520 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
521 with underbars is given. The write-protection of configuration introduced
522 in 4.95 trapped when normalisation was applied to an option not needing
525 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
527 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
528 failing to close the certificates directory, every hour or any time it
531 JH/16 Debugging initiated by an ACL control now continues through into routing
532 and transport processes. Previously debugging stopped any time Exim
533 re-execs, or for processing a queued message.
535 JH/17 The "expand" debug selector now gives more detail, specifically on the
536 result of expansion operators and items.
538 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
539 bad comparison between the option value and the name of the file to
540 be included was done, and a mismatch was wrongly identified.
541 4.88 to 4.95 are affected.
543 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
545 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
546 supplied as the db file-pair basename. Previously, if a directory
547 path was given, for example via the autoreply "once" option, the DB
548 file.pag and file.dir files would be created in that directory's
551 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
552 "taint" log_selector. These were previously deprecated.
554 JH/22 Fix static address-list lookups to properly return the matched item.
555 Previously only the domain part was returned.
557 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
558 the call into OpenSSL to send a TLS Close was being repeated; this
559 resulted in the library waiting for the peer's Close. If that was never
560 sent we waited forever. Fix by tracking send calls.
562 JH/24 The ${run} expansion item now expands its command string elements after
563 splitting. Previously it was before; the new ordering makes handling
564 zero-length arguments simpler. The old ordering can be obtained by
565 appending a new option "preexpand", after a comma, to the "run".
567 JH/25 Taint-check exec arguments for transport-initiated external processes.
568 Previously, tainted values could be used. This affects "pipe", "lmtp" and
569 "queryprogram" transport, transport-filter, and ETRN commands.
570 The ${run} expansion is also affected: in "preexpand" mode no part of
571 the command line may be tainted, in default mode the executable name
574 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
575 the the facility was not passed across execs, and only the first message
576 passed over a connection could use BDAT; any further ones using DATA.
578 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
579 uses $sending_ip_address and an interface is specified.
580 Previously any use of the local address in the EHLO name disabled
581 PIPECONNECT, the common case being to use the rDNS of it.
583 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
584 resumption. Previously verify failed because no certificate status is
585 passed on the wire for the restarted session. Fix by using the recorded
586 ocsp status of the stored session for the new connection.
588 JH/29 TLS resumption: the key for session lookup in the client now includes
589 more info that a server could potentially use in configuring a TLS
590 session, avoiding oferring mismatching sessions to such a server.
591 Previously only the server IP was used.
593 JH/30 Fix string_copyn() for limit greater than actual string length.
594 Previously the copied amount was the limit, which could result in a
595 overlapping memcpy for newly allocated destination soon after a
596 source string shorter than the limit. Found/investigated by KM.
598 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
599 close; it may be needed for a subsequent connection. This caused a
600 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
602 JH/32 Fix CHUNKING for a second message on a connection when the first was
603 rejected. Previously we did not reset the chunking-offered state, and
604 erroneously rejected the BDAT command. Investigation help from
607 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
608 an empty address. Previously the expansion returned an error.
610 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
611 proxy. Previously these were misparsed, leading to paniclog entries.
617 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
618 related applications. Previously an "H" was used where available info
619 says that "M" should be, so change to match.
621 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
622 as arguments, so an implementation trying to copy these into a local
623 buffer was taking a taint-enforcement trap. Fix by using dynamically
624 created buffers. Similar fix for radius expansion condition.
626 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
627 reasonable, eg. to count headers. Fix by using dynamically created
628 buffers rather than a local. Do similar fixes for ACL actions "dcc",
629 "log_reject_target", "malware" and "spam"; the arguments are expanded
630 so could be handling tainted values.
632 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
633 broken the (no-op) support for this sendmail command. Restore it
634 to doing nothing, silently, and returning good status.
636 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
637 record path was given (or the default used) without a leading directory
638 path, an error occurred on trying to open it. Use the transport's working
641 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
642 transport. Previously it was the name on the DNS A-record; use instead
643 the head of the CNAME chain leading there (if there is one). This seems
644 to align better with RFC 6125.
646 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
647 smtp_accept_max_per_host allocated resources which were not released
648 when the limit was exceeded. This eventually crashed the daemon. Fix
649 by adding a release action in that path.
651 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
652 expanded; previously using tainted values was rejected. Fix by using
653 dynamically-created buffers.
655 JH/09 Relax restrictions on ACL verify condition needing access to message
656 headers. Previously they were only permitted in data and non-smtp ACLs;
657 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
658 not_blind, header_sender and header_names_ascii verification.
660 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
661 Previously a macro used one argument twice; when called with the
662 argument as an expression having side-effects, incorrect operation
663 resulted. Use an inlineable function.
665 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
666 held open for a verify callout. Previously this wan not accounted for
667 and a corrupt onward SMTP conversation resulted.
669 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
670 Previously they were embedded naively in the constructed address; when
671 needed, strip the quoting and quote the entire local_part.
672 Also make the inbound_srs expansion condition handle quoting.
674 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
675 excluded, not matching the documentation.
677 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
678 was given for the sqlite_dbfile a trap resulted.
680 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
681 "name" argument resulted in a trap. There is no reason to disallow such;
682 this was a coding error.
684 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
685 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
686 spent suspended, ignoring the POSIX definition. Previously we assumed
687 it did and a constant offset from real time could be used as a correction.
688 Change to using the same clock source for the start-of-message and the
689 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
690 exists, just to get a clock slightly more aligned to reality.
692 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
693 RFC says it is optional some validators care. The missing char was not
694 intended but triggered by a line-wrap alignment. Discovery and fix by
695 Guillaume Outters, hacked on by JH.
697 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
698 name being quoted was tainted a trap would be taken. Fix by using
699 dynamically created buffers. The routine could have been called by a
700 rewrite with the "h" flag, by using the "-F" command-line option, or
701 by using a "name=" option on a control=submission ACL modifier.
703 JH/19 SPF: change the Authentication-Results expansion component to give
704 smtp.helo when the sender domain is empty. Previously it gave
707 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
708 not in 127.0.0.0/8 to help in spotting list domains taken over by a
709 domain-parking registrar.
711 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
712 Previously when a whitespace character was specified it was not inserted
713 after removing the newline.
715 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
716 the domain part of the recipient address. This overrides any tls_sni
717 option set, which was previously used.
719 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
722 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
723 is_tainted() had an off-by-one error in the overenthusiastic direction.
724 Find and fix by Gavan. Although NetBSD is not a supported platform for
725 4.94 this bug could affect other platforms.
727 PP/01 Fix default prime selection to be consistent.
728 One path used ike23 still, instead of exim.dev.20160529.3; now both
729 execution flows will use the same DH primes (currently
730 exim.dev.20160529.3).
732 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
733 option in smtp transport, to match the documentation. Previously
734 verification was not being done in some cases where it should have been.
736 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
737 than one server was defined and depending on the platform memory layout
738 details, an internal consistency trap could be hit while walking the list
741 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
742 files. The value is used by the authresults expansion item. Previously
743 if this was used in a router or transport, a crash could result.
745 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
746 have a sufficient incidence of EINTR returns from select that an
747 interaction with other operations done by the main daemon loop exposed
748 a bug in the error-handling. This was benign apart from the log
751 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
752 for consistency with delivered "=>" and failed "**" lines. While we're
753 there, handle PRX and TFO.
755 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
756 applied. This resulted, if any header-line rewrite rules were configured,
757 in a panic-log triggerable by sending a message with a long address in
758 a header. Fix by increasing the arbitrary limit to larger than a single
759 (dewrapped) 5322 header line maximum size.
761 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
762 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
763 RFC 6648 which deprecates X- options in protocols as a general practice.
764 Changeover between the implementations is handled by the mechanisms
767 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
768 a remote which uses callout/hold. Previously the local was queued.
770 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
773 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
774 log line. The asterisk is now consistently appended to the remote IP
775 (and port, if given), and will also be provided on defer and fail log
776 lines. Previously it could be placed on the local IP if that was being
777 logged, and was only provided on delivery lines.
779 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
781 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
782 authenticator client_send option. Previously the next char, after a pair
783 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
784 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
785 documentation. There is still no way to get a leading ^ immediately
786 after a NUL (ie. for the password of a PLAIN method authenticator.
788 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
789 files. For bad sizes read, delete the record and whine to paniclog.
791 JH/38 When logging an AUTH failure, as server, do not include sensitive
792 information. Previously, the credentials would be included if given
793 as part of the AUTH command line and an ACL denied authentication.
795 JH/39 Bug 2691: fix $local_part_data. When the matching list element
796 referred to a file, bad data was returned. This likely also affected
799 JH/40 The gsasl authenticator now supports caching of the salted password
800 generated by the client-side implementation. This required the addition
801 of a new variable: $auth4.
803 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
804 left undeleted; the attempt to re-create it then failed - resulting in
805 the usual "SIGHUP tp have daemon reload configuration" to not work.
806 This affected any platform not supporting "abstract" Unix-domain
807 sockets (i.e. not Linux).
809 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
810 recipients" response to RCPT in a later response, with a 250. The
811 previous coding assumed this would not happen, and under PIPELINING
812 would result in both lost and duplicate recipients for a message.
814 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
815 Previously the weighting was incorrectly applied. Similar fix for socks
816 proxies. Found and fixed by Heiko Schlichting.
818 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
819 not handle sub-lists included using the +namedlist syntax. While
820 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
821 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
824 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
825 Previously the permanent pool was used, so the store could not be freed.
826 This meant a connection with many messages would use continually-growing
829 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
830 per-pool so as not to waste too much space. Previously a constant size
831 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
832 DOS attacks harder. The cost is wasted memory use in the larger blocks.
834 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
835 same space repeatedly, and a smaller process footprint.
837 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
838 for GnuTLS. Previously the name started "%s" which, while not a bug,
839 looked as if if might be one.
841 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
842 "continued connection") make the $proxy_* variables available. Previously
843 the information was not passed across the exec() call for subsequent
844 transport executions. This also mean that the log lines for the
845 messages can show the proxy information.
847 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
848 receive time. With modern systems the difference is significant.
849 The historical behaviour can be restored by disabling (a new) log_selector
850 "queue_time_exclusive".
852 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
853 content) were specifically tested for. Now, also cover expansions
854 resulting in ACL names and inline ACL content.
856 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
857 making it unusable in complex expressions.
859 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
860 fail with a taint-check on the spoolfile name, and leave the message
863 HS/01 Enforce absolute PID file path name.
865 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
867 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
869 PP/02 Bug 2643: Correct TLS DH constants.
870 A missing NUL termination in our code-generation tool had led to some
871 incorrect Diffie-Hellman constants in the Exim source.
872 Reported by kylon94, code-gen tool fix by Simon Arlott.
874 PP/03 Impose security length checks on various command-line options.
875 Fixes CVE-2020-SPRSS reported by Qualys.
877 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
878 better. Reported by Qualys.
880 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
881 providing a particularly obnoxious sender full name.
884 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
886 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
889 PP/08 Change default for recipients_max from unlimited to 50,000.
891 PP/09 Fix security issue with too many recipients on a message (to remove a
892 known security problem if someone does set recipients_max to unlimited,
893 or if local additions add to the recipient list).
894 Fixes CVE-2020-RCPTL reported by Qualys.
896 PP/10 Fix security issue in SMTP verb option parsing
897 Fixes CVE-2020-EXOPT reported by Qualys.
899 PP/11 Fix security issue in BDAT state confusion.
900 Ensure we reset known-good where we know we need to not be reading BDAT
901 data, as a general case fix, and move the places where we switch to BDAT
902 mode until after various protocol state checks.
903 Fixes CVE-2020-BDATA reported by Qualys.
905 HS/03 Die on "/../" in msglog file names
907 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
908 the Exim runtime user are allowed to create files.
910 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
913 QS/03 When reading the output from interpreted forward files we do not
914 pass the pipe between the parent and the interpreting process to
915 executed child processes (if any).
917 QS/04 Always die if requested from internal logging, even is logging is
920 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
921 the API; compilation noo longer completes with DMARC support included.
922 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
923 been reported on other platforms.
925 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
927 JH/56 Make the majority of info read from config files readonly, for defence-in-
928 depth against exploits. Suggestion by Qualys.
929 Not supported on Solaris 10.
931 JH/57 Fix control=fakreject for a custom message containing tainted data.
932 Previously this resulted in a log complaint, due to a re-expansion present
933 since fakereject was originally introduced.
935 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
936 modifier was given, a loop resulted.
938 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
939 pipelined SMTP command followed the BDAT LAST then it would be
940 incorrectly treated as part of the message body, causing a verification
943 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
944 require looser validation rules than those for 821-level addresses,
945 which only permit IP addresses.
951 JH/01 Avoid costly startup code when not strictly needed. This reduces time
952 for some exim process initialisations. It does mean that the logging
953 of TLS configuration problems is only done for the daemon startup.
955 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
957 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
958 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
961 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
962 DKIM signing is being done. Previously a transport_filter would always
963 disable CHUNKING, falling back to traditional DATA.
965 JH/05 Regard command-line recipients as tainted.
967 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
969 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
970 PAM library frees one of the arguments given to it, despite the
971 documentation. Therefore a plain malloc must be used.
973 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
974 on-stack buffers were used, resulting in a taint trap when DSN information
975 copied from a received message was written into the buffer.
977 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
978 the ordering of its ARC headers. This caused a crash.
980 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
981 a new record was being constructed with information from the peer, a trap
984 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
985 installation would get error messages from DMARC verify, when it hit the
986 nonexistent file indicated by the default. Distros wanting DMARC enabled
987 should both provide the file and set the option.
988 Also enforce no DMARC verification for command-line sourced messages.
990 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
991 could, depending on the platform, hang at the STARTTLS response.
993 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
994 message on a connection. Previously if one message had ARC headers and
995 the following one did not, a crash could result when adding an
996 Authentication-Results: header.
998 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
999 Exim main code and Exim-related utities. The introduction of taint
1000 tracking also did many adjustments to string handling. Since then, eximon
1001 frequently terminated with an assert failure.
1003 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
1004 check for 452 responses. This slightly helps the inefficieny of doing
1005 a large alias-expansion into a recipient-limited target. The max_rcpt
1006 transport option still applies (and at the current default, will override
1007 the new feature). The check is done for either cause of synch, and forces
1008 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
1009 connection. The new facility is not tunable at this time.
1011 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
1012 library live data was being used, so the results became garbage. Make
1013 copies while it is still usable.
1015 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
1016 on delivery deferred (==) and failed (**) lines (if a delivery was
1017 attemtped). Previously it was only on completion (=>) lines.
1019 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
1020 for the expansion of the server_scram_iter and server_scram_salt options.
1022 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
1023 are now specifically given a NO_DATA response without hitting the system
1024 resolver. The library goes on to do the now-standard TXT lookup.
1025 Use of dnsdb lookups is not affected.
1027 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
1028 only retrieve the errormessage once. Previously two calls to dlerror()
1029 were used, and the second one (for mainlog/paniclog) retrieved null
1032 JH/20 Taint checking: disallow use of tainted data for
1033 - the appendfile transport file and directory options
1034 - the pipe transport command
1035 - the autoreply transport file, log and once options
1036 - file names used by the redirect router (including filter files)
1038 - paths used by single-key lookups
1039 Previously this was permitted.
1041 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
1042 adjusted the size of a major service buffer; this failed because the
1043 buffer was in use at the time. Change to a compile-time increase in the
1044 buffer size, when this authenticator is compiled into exim.
1046 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
1047 previous fast-mode was untenable in the face of glibs using mmap to
1048 support larger malloc requests.
1050 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
1051 New values supported, if defined on system where compiled:
1052 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
1053 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
1055 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
1056 running a limited number of proceses in parallel, a benefit is gained. The
1057 amount varies with the platform hardware and load. The use of the option
1058 queue_run_in_order means we cannot do this, as ordering becomes
1061 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1062 had introduced a string-copy (for ensuring NUL-termination) which was not
1063 appropriate for that case, which can include embedded NUL bytes in the
1064 block of data. Investigation showed the copy to actually be needless, the
1065 data being length-specified.
1067 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1068 done during a receiving connection, and both used TLS, global info was
1069 used rather than per-connection info for tracking the state of data
1070 queued for transmission. This could result in a connection hang.
1072 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1073 Previously, when delivering serveral messages down a single connection
1074 only the first would provide a SIZE. This was due to the size information
1075 not being properly tracked.
1077 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1078 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1079 expansion and logging. Previously, spurious values such as a future
1080 minute could be seen.
1082 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1083 it could crash from a null-deref. This could also affect the
1084 ${addresses: } operator and ${readsock } item.
1086 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1087 message following a mime one, the variable was not reset.
1089 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1090 cached capability (perhaps the peer reneged?) and immediately retry in
1093 JH/31 Fix spurious detection of timeout while writing to transport filter.
1095 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1096 an attempt to copy the string was made before checking it.
1098 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1099 taint of the lookup key was maintained; we now regard the presence in the
1100 filesystem as sufficient validation.
1102 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1103 argument is supplied.
1105 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1106 Previously this was not checked, and nonempty relative paths made an
1107 access under Exim's current working directory.
1109 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1110 Previously no event was raised.
1112 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1113 parameter supplied by the sender MAIL FROM command. Previously it was
1114 ignored, and only the check_spool_space option value for the required
1117 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1118 the size of the signing public-key. Previously it was instead giving
1119 the size of the signature hash.
1121 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1122 the default. See the (new) dkim_verify_min_keysizes option.
1124 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1125 and an ACL use a lookup for checking either the local_part or domain,
1126 stale data could be accessed. Ensure that variable references are
1127 dropped between messages.
1129 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1130 by the client was not checked as pointing within response data before
1131 being used. A malicious client could thus cause an out-of-bounds read and
1132 possibly gain authentication. Fix by adding the check.
1134 JH/42 Internationalisation: change the default for downconversion in the smtp
1135 transport to be "if needed". Previously it was "as previously set" for
1136 the message, which usually meant "if needed" for message-submission but
1137 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1138 even when the envelope addresses did not need it, resulting in forwarding
1139 failures to non-supporting MTAs. A downconvert in such cases will be
1140 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1141 transport. The change does mean that addresses needing conversion will
1142 be converted when previously a delivery failure would occur.
1144 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1145 response was received it would be used unchecked in a fail-DSN, violating
1146 standards on line-length limits. Truncate if needed.
1148 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1149 doesn't work. (Additionally add a new main config option to configure the
1156 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1157 side, to decode a TLS 1.3 packet capture.
1159 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1160 Previously the default library behaviour applied, sending two, each in
1161 its own TCP segment.
1163 JH/03 Debug output for ACL now gives the config file name and line number for
1166 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1168 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1170 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1171 buffer overrun for (non-chunking) other transports.
1173 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1174 TLS1.3, means that a server rejecting a client certificate is not visible
1175 to the client until the first read of encrypted data (typically the
1176 response to EHLO). Add detection for that case and treat it as a failed
1177 TLS connection attempt, so that the normal retry-in-clear can work (if
1178 suitably configured).
1180 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1181 and/or domain. Found and fixed by Jason Betts.
1183 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1184 configuration). If a CNAME target was not a wellformed name pattern, a
1187 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1188 the OS reports them interleaved with other addresses.
1190 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1191 used both for input and for a verify callout, both encrypted, SMTP
1192 responses being sent by the server could be lost. This resulted in
1193 dropped connections and sometimes bounces generated by a peer sending
1196 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1197 string. Previously it was possible to cause undefined behaviour in a
1198 library routine (usually a crash). Found by "zerons".
1200 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1203 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1204 API was removed, so update to use the newer ones.
1206 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1207 any timeout set, is taking a long time. Previously we would hang on to a
1208 rotated logfile "forever" if the input was arriving with long gaps
1209 (a previous attempt to fix addressed lack, for a long time, of initial
1212 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1213 shared (NFS) environment. The length of the tempfile name is now
1214 4 + 16 ("hdr.$message_exim_id") which might break on file
1215 systems which restrict the file name length to lower values.
1216 (It was "hdr.$pid".)
1218 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1219 shared (NFS) environment.
1221 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1222 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1225 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1226 on some platforms for bit 31.
1228 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1229 to changes apparently associated with TLS1.3 handling some of the APIs
1230 previously used were either nonfunctional or inappropriate. Strings
1231 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1232 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1233 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1234 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1235 and the use of specific cipher names in the encrypted= ACL condition.
1237 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1239 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1240 verification result was not updated unless hosts_require_ocsp applied.
1242 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1243 queue_list_requires_admin set to false, non-admin users were denied the
1246 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1247 directory-of-certs mode. Previously they were advertised despite the
1250 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1251 A single TCP connection by a client will now hold a TLS connection open
1252 for multiple message deliveries, by default. Previously the default was to
1255 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1256 default. If built with the facility, DANE will be used. The facility
1257 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1259 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1260 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1261 must be defined and you must still, unless you define DISABLE_TLS, manage
1262 the the include-dir and library-file requirements that go with that
1263 choice. Non-TLS builds are still supported.
1265 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1268 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1269 default. If the platform supports and has the facility enabled, it will
1270 be requested on all coneections.
1272 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1273 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1275 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1277 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1278 success-DSN messages. Previously the From: header was always the default
1279 one for these; the option was ignored.
1281 JH/28 Fix the timeout on smtp response to apply to the whole response.
1282 Previously it was reset for every read, so a teergrubing peer sending
1283 single bytes within the time limit could extend the connection for a
1284 long time. Credit to Qualsys Security Advisory Team for the discovery.
1286 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1287 delivery address, which leaked information of the results of local
1288 forwarding. Change to the original envelope recipient address, per
1291 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1292 requested. Previously not bounce was generated and a log entry of
1293 error ignored was made.
1295 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1297 JH/32 Introduce a general tainting mechanism for values read from the input
1298 channel, and values derived from them. Refuse to expand any tainted
1299 values, to catch one form of exploit.
1301 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1302 was unused and the unexpanded text used for the test. Found and
1303 fixed by Ruben Jenster.
1305 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1306 an attempt to use a TLS library read routine dereffed a nul pointer,
1309 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1310 them in our smtp response.
1312 JH/36 Have the general router option retry_use_local_part default to true when
1313 any of the restrictive preconditions are set (to anything). Previously it
1314 was only for check_local user. The change removes one item of manual
1315 configuration which is required for proper retries when a remote router
1316 handles a subset of addresses for a domain.
1318 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1319 link count into consideration.
1321 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1322 caused the extension of big_buffer, the following lines were ignored.
1324 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1325 accordance with RFC 2308. Previously there was no expiry, so a longlived
1326 receive process (eg. due to ACL delays) versus a short SOA value could
1329 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1331 JH/39 Promote DMARC support to mainline.
1333 JH/40 Bug 2452: Add a References: header to DSNs.
1335 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1336 parameters. The relevant library call is documented as "Deprecated: This
1337 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1338 3.6.0, DH parameters are negotiated following RFC7919."
1340 HS/06 Change the default of dnssec_request_domains to "*"
1342 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1343 carried on and emitted a BDAT command, even when PIPELINING was not
1346 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1347 buffer was used for the filename, resulting in a trap when tainted
1348 arguments (eg. $domain) were used.
1350 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1351 recommended to avoid a possible server-load attack. The feature can be
1352 re-enabled via the openssl_options main cofiguration option.
1354 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1355 for version 4.90 - adding a "more data" boolean to the arguments.
1356 Bumped the ABI version number also, this having been missed previously;
1357 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1358 respect of usage of smtp_printf() by either local_scan code or libraries
1359 accessed via the ${dlfunc } expansion item. Both will need coding
1360 adjustment for any calls to smtp_printf() to match the new function
1361 signature; a FALSE value for the new argument is always safe.
1363 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1364 the file-offset (which the Linux syscall does, and exim expects); this
1365 resulted in an indefinite loop.
1367 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1368 to do ARC verification. The Authentication-Results: header line added
1369 by the configuration then had no ARC item.
1371 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1372 an incorrect mode was used for reading the result, resulting in it being
1379 JH/01 Remove code calling the customisable local_scan function, unless a new
1380 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1382 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1383 non-signal-safe functions being used.
1385 JH/03 Bug 2269: When presented with a received message having a stupidly large
1386 number of DKIM-Signature headers, disable DKIM verification to avoid
1387 a resource-consumption attack. The limit is set at twenty.
1389 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1390 report of oldest_pass in ${authres } in consequence, and separate out
1391 some descriptions of reasons for verification fail.
1393 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1394 files in the spool were present and unlocked. A queue-runner could spot
1395 them, resulting in a duplicate delivery. Fix that by doing the unlock
1396 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1397 add more error-checking on spoolfile handling while that code is being
1400 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1401 No known attacks, no CVE, this is defensive hardening.
1403 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1404 a queue-runner could start a delivery while other operations were ongoing.
1405 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1406 Found and investigated by Tim Stewart. Fix by using the open message data
1407 file handle rather than opening another, and not locally closing it (which
1408 releases a lock) for that case, while creating the temporary .eml format
1409 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1411 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1412 $sender_verify_failure/$recipient_verify_failure to "random".
1414 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1417 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1418 Previously this would segfault.
1420 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1423 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1424 like zero, since the resolver should be doing this for us, But we need one
1425 as a CNAME but no MX presence gets the CNAME returned; we need to check
1426 that doesn't point to an MX to declare it "no MX returned" rather than
1427 "error, loop". A new main option is added so the older capability of
1428 following some limited number of chain links is maintained.
1430 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1432 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1433 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1434 now-deprecated earlier definitions used only specified the range up to TLS
1435 1.2 (in the older-version library docs).
1437 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1439 JH/15 Rework TLS client-side context management. Stop using a global, and
1440 explicitly pass a context around. This enables future use of TLS for
1441 connections to service-daemons (eg. malware scanning) while a client smtp
1442 connection is using TLS; with cutthrough connections this is quite likely.
1444 JH/16 Fix ARC verification to do AS checks in reverse order.
1446 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1448 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1449 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1450 Previously the "utf8" would be re-prepended for every additional message.
1452 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1453 Previously thery were accepted, resulting in issues when attempting to
1454 forward messages to a non-supporting MTA.
1456 PP/02 Let -n work with printing macros too, not just options.
1458 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1459 one parent address was copied, and bogus data was used at delivery-logging
1460 time. Either a crash (after delivery) or bogus log data could result.
1461 Discovery and analysis by Tim Stewart.
1463 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1464 Previously if the string ended mid-character, we did not insert the
1465 promised '?' replacement.
1467 PP/04 Documentation: current string operators work on bytes, not codepoints.
1469 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1470 should pack well giving a smaller memory footprint so better caching and
1471 therefore performance. Group the declarations where this can't be done so
1472 that the byte-sized flag variables are not interspersed among pointer
1473 variables, giving a better chance of good packing by the compiler.
1475 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1476 non-null, to avoid issues with sites running BATV. Previously reports were
1477 sent with an empty envelope sender so looked like bounces.
1479 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1480 The ignore_error flag wasn't being returned from the filter subprocess so
1481 was not set for later routers. Investigation and fix by Matthias Kurz.
1483 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1484 and a msg:complete for the whole, when a message is manually removed using
1485 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1487 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1488 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1489 hope that is portable enough.
1491 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1492 requiring a known-CA anchor certificate; make it now rely entirely on the
1493 TLSA as an anchor. Checking the name on the leaf cert against the name
1494 on the A-record for the host is still done for TA (but not for EE mode).
1496 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1497 included in delivery lines for non-proxied connections, when compiled with
1498 SUPPORT_SOCKS and running with proxy logging enabled.
1500 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1501 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1502 move the existing event to fire before the normal logging of message
1503 failure so that custom logging is bracketed by normal logging.
1505 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1506 msg:fail:internal event. Developement by Matthias Kurz.
1508 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1509 far too small for todays use of crypto signatures stored there. Go all
1510 the way to the max DNS message size of 64kB, even though this might be
1511 overmuch for IOT constrained device use.
1513 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1514 copy a string over itself. The library routine is documented as not
1515 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1517 JH/32 For main options check_spool_space and check_inode_space, where the
1518 platform supports 64b integers, support more than the previous 2^31 kB
1519 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1520 the previous G, M, k.
1522 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1523 $authenticated_fail_id variable on authentication failure. Previously
1526 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1527 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1528 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1529 GNUTLS_SEC_PARAM_MEDIUM.
1531 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1532 side. Previously we would continue as if no SNI had been received.
1534 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1535 "<" character, which should be a list-separator specification, we walked
1536 off past the nul-terimation.
1538 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1539 causes) even when the retry time is not yet met. Previously they were
1540 not, meaning that when (say) an account was over-quota and temp-rejecting,
1541 and multiple senders' messages were queued, only one sender would get
1542 notified on each configured delay_warning cycle.
1544 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1546 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1547 cipher-suites, an error can be left on the stack even for a succeeding
1548 accept; this results in impossible error messages when a later operation
1551 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1552 return error codes indicating retry. Under TLS1.3 this becomes required.
1554 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1555 it only wrote the new authenticators, resulting in a lack of tracking of
1556 peer changes of ESMTP extensions until the next cache flush.
1558 JH/41 Fix the loop reading a message header line to check for integer overflow,
1559 and more-often against header_maxsize. Previously a crafted message could
1560 induce a crash of the recive process; now the message is cleanly rejected.
1562 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1563 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1569 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1570 When redis_servers is set to a list of > 1 element, and the Redis servers
1571 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1572 case of MOVED into a DEFER case instead, thus moving the query onto the
1573 next server in the list. For a cluster of N elements, all N servers must
1574 be defined in redis_servers.
1576 GF/02 Catch and remove uninitialized value warning in exiqsumm
1577 Check for existence of @ARGV before looking at $ARGV[0]
1579 JH/01 Replace the store_release() internal interface with store_newblock(),
1580 which internalises the check required to safely use the old one, plus
1581 the allocate and data copy operations duplicated in both (!) of the
1582 extant use locations.
1584 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1585 modifier. This matches the restriction on the commandline.
1587 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1588 Previously only the last row was returned.
1590 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1591 we assumed that tags in the header were well-formed, and parsed the
1592 element content after inspecting only the first char of the tag.
1593 Assumptions at that stage could crash the receive process on malformed
1596 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1597 While running the DKIM ACL we operate on the Permanent memory pool so that
1598 variables created with "set" persist to the DATA ACL. Also (at any time)
1599 DNS lookups that fail create cache records using the Permanent pool. But
1600 expansions release any allocations made on the current pool - so a dnsdb
1601 lookup expansion done in the DKIM ACL releases the memory used for the
1602 DNS negative-cache, and bad things result. Solution is to switch to the
1603 Main pool for expansions.
1604 While we're in that code, add checks on the DNS cache during store_reset,
1605 active in the testsuite.
1606 Problem spotted, and debugging aided, by Wolfgang Breyha.
1608 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1609 When none of the hosts presented to a transport match an already-open
1610 connection, close it and proceed with the list. Previously we would
1611 queue the message. Spotted by Lena with Yahoo, probably involving
1614 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1615 Previously a spurious "250 OK id=" response was appended to the proper
1618 JH/08 The "support for" informational output now, which built with Content
1619 Scanning support, has a line for the malware scanner interfaces compiled
1620 in. Interface can be individually included or not at build time.
1622 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1623 by the template makefile "src/EDITME". The "STREAM" support for an older
1624 ClamAV interface method is removed.
1626 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1627 rows affected is given instead).
1629 JH/11 The runtime Berkeley DB library version is now additionally output by
1630 "exim -d -bV". Previously only the compile-time version was shown.
1632 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1633 SMTP connection. Previously, when one had more recipients than the
1634 first, an abortive onward connection was made. Move to full support for
1635 multiple onward connections in sequence, handling cutthrough connection
1636 for all multi-message initiating connections.
1638 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1639 routers. Previously, a multi-recipient message would fail to match the
1640 onward-connection opened for the first recipient, and cause its closure.
1642 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1643 a timeout on read on a GnuTLS initiating connection, resulting in the
1644 initiating connection being dropped. This mattered most when the callout
1645 was marked defer_ok. Fix to keep the two timeout-detection methods
1648 JH/15 Relax results from ACL control request to enable cutthrough, in
1649 unsupported situations, from error to silently (except under debug)
1650 ignoring. This covers use with PRDR, frozen messages, queue-only and
1653 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1655 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1656 metadata, resulting in a crash in free().
1658 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1659 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1660 Broken also in d185889f4, with init system revamp.
1662 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1663 Previously we abruptly closed the connection after reading a malware-
1664 found indication; now we go on to read the "scan ok" response line,
1667 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1668 ACL. Previously, a crash would result.
1670 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1671 macro text after a replacement (previously it was only once per line) and
1672 by skipping builtin macros when searching for an uppercase lead character.
1674 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1675 for the build is renamed.
1677 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1678 was allocated for every new TLS startup, meaning one per message. Fix
1679 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1681 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1682 reported the original. Fix to report (as far as possible) the ACL
1683 result replacing the original.
1685 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1686 OpenSSL. Certificate information is loaded for every new TLS startup,
1687 and the resources needed to be freed.
1689 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1691 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1694 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1695 DATA response info to the (existing) per-recipient response info for
1696 the "C=" log element. It can have useful tracking info from the
1697 destination system. Patch from Simon Arlott.
1699 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1700 length value. Previously this would segfault.
1702 HS/02 Support Avast multiline protoocol, this allows passing flags to
1703 newer versions of the scanner.
1705 JH/28 Ensure that variables possibly set during message acceptance are marked
1706 dead before release of memory in the daemon loop. This stops complaints
1707 about them when the debug_store option is enabled. Discovered specifically
1708 for sender_rate_period, but applies to a whole set of variables.
1709 Do the same for the queue-runner and queue-list loops, for variables set
1710 from spool message files. Do the same for the SMTP per-message loop, for
1711 certain variables indirectly set in ACL operations.
1713 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1714 as a multi-recipient message from a mailinglist manager). The coding had
1715 an arbitrary cutoff number of characters while checking for more input;
1716 enforced by writing a NUL into the buffer. This corrupted long / fast
1717 input. The problem was exposed more widely when more pipelineing of SMTP
1718 responses was introduced, and one Exim system was feeding another.
1719 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1720 receiving system, and refused recipients seen by the sending system
1721 (propating to people being dropped from mailing lists).
1722 Discovered and pinpointed by David Carter.
1724 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1725 replaced by the ${authresults } expansion.
1727 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1729 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1730 allows proper process termination in container environments.
1732 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1733 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1735 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1736 and "err_perm", deprecated since 4.83 when the RFC-defined words
1737 "temperror" and "permerror" were introduced.
1739 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1740 transport-filters or DKIM-signing. The restriction was lost in the
1741 consolidation of verify-callout and delivery SMTP handling.
1742 Extend the restriction to also cover ARC-signing.
1744 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1745 in defer=pass mode supply a 450 to the initiator. Previously the message
1748 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1749 tls_require_ciphers is used as before.
1751 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1752 "pass_unscanned". Only tmpfails from the scanner are written to
1753 the paniclog, as they may require admin intervention (permission
1754 denied, license issues). Other scanner errors (like decompression
1755 bombs) do not cause a paniclog entry.
1757 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1758 Previously it was possible to log spurious information in receive log
1761 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1762 triggered odd behaviour from Outlook Express clients.
1764 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1767 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1768 since the IETF WG has not yet settled on that versus the original
1769 "bare" representation.
1771 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1772 Previously the millisecond value corrupted the output.
1773 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1774 corrupted the output.
1780 JH/01 Rework error string handling in TLS interface so that the caller in
1781 more cases is responsible for logging. This permits library-sourced
1782 string to be attached to addresses during delivery, and collapses
1783 pairs of long lines into single ones.
1785 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1786 during configuration. Wildcards are allowed and expanded.
1788 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1789 This permits better logging.
1791 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1792 do not close it down and have the child transport start it up again on
1793 the passed-on TCP connection. Instead, proxy the child (and any
1794 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1795 affected: the continued delivery log lines do not have any DNSSEC, TLS
1796 Certificate or OCSP information. TLS cipher information is still logged.
1798 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1799 identical IP addresses on different listening ports. Will also affect
1802 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1803 add noisy ifdef guards to special-case this sillyness.
1804 Patch from Bernd Kuhls.
1806 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1807 than 255 are no longer allowed.
1809 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1810 Disable the session-cache too, which might reduce our load. Since we
1811 currrectly use a new context for every connection, both as server and
1812 client, there is no benefit for these.
1813 GnuTLS appears to not support tickets server-side by default (we don't
1814 call gnutls_session_ticket_enable_server()) but client side is enabled
1815 by default on recent versions (3.1.3 +) unless the PFS priority string
1818 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1819 <https://reproducible-builds.org/specs/source-date-epoch/>.
1821 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1822 the check for any unsuccessful recipients did not notice the limit, and
1823 erroneously found still-pending ones.
1825 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1826 MSG_MORE. Only in-clear (not on TLS connections).
1828 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1829 transport-filter is involved we can buffer the headers in memory for
1830 creating the signature, and read the spool data file once for the
1831 signature and again for transmission.
1833 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1834 4.77 as the kernel support then wasn't solid, having issues in 64bit
1835 mode. Now, it's been long enough. Add support for FreeBSD also.
1837 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1838 case where the routing stage had gathered several addresses to send to
1839 a host before calling the transport for the first, we previously failed
1840 to close down TLS in the old transport process before passing the TCP
1841 connection to the new process. The new one sent a STARTTLS command
1842 which naturally failed, giving a failed delivery and bloating the retry
1843 database. Investigation and fix prototype from Wolfgang Breyha.
1845 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1846 false-negatives in the check that the sender had not preempted a response
1847 or prompt from Exim (running as a server), due to that code's lack of
1848 awareness of the SMTP input buffering.
1850 PP/04 Add commandline_checks_require_admin option.
1851 Exim drops privileges sanely, various checks such as -be aren't a
1852 security problem, as long as you trust local users with access to their
1853 own account. When invoked by services which pass untrusted data to
1854 Exim, this might be an issue. Set this option in main configuration
1855 AND make fixes to the calling application, such as using `--` to stop
1858 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1859 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1860 responses to those, into a single TLS record each way (this usually means
1861 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1864 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1865 affects you only if you're dancing at the edge of the param size limits.
1866 If you are, and this message makes sense to you, then: raise the
1867 configured limit or use OpenSSL 1.1. Nothing we can do for older
1870 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1871 cmdline element to get the documented default one. Previously it was
1874 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1875 are unsuable for non-message-specific reasons - eg. connection timeout,
1876 banner-time rejection.
1878 JH/16 Fix logging of delivery remote port, when specified by router, under
1881 PP/06 Repair manualroute's ability to take options in any order, even if one
1882 is the name of a transport.
1885 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1887 JH/17 Change the list-building routines interface to use the expanding-string
1888 triplet model, for better allocation and copying behaviour.
1890 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1891 Previously it was constructed the first time a possibly-matching string
1892 was met in the configuration file input during startup; now it is done
1895 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1896 compatible one, to avoid the (poorly documented) possibility of a config
1897 file in the working directory redirecting the DB files, possibly correpting
1898 some existing file. CVE-2017-10140 assigned for BDB.
1900 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1901 cache-hot. Previously, although the result was properly cached, the
1902 initial verify call returned a defer.
1904 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1905 the main verify for receipient in uncached-mode.
1907 JH/22 Retire historical build files to an "unsupported" subdir. These are
1908 defined as "ones for which we have no current evidence of testing".
1910 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1911 if present. Previously it was ignored.
1913 JH/24 Start using specified-initialisers in C structure init coding. This is
1914 a C99 feature (it's 2017, so now considered safe).
1916 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1917 if was a fixed-sized field and bitmask ops via macros; it is now more
1920 PP/07 GitHub PR 56: Apply MariaDB build fix.
1921 Patch provided by Jaroslav Škarvada.
1923 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1924 during Coverity cleanups [4.87 JH/47]
1925 Diagnosis and fix provided by Michael Fischer v. Mollard.
1927 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1928 the right size to place the terminating semicolon on its own folded
1929 line, the header hash was calculated to an incorrect value thanks to
1930 the (relaxed) space the fold became.
1932 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1933 and confused the parent.
1935 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1936 which could crash as a result. This could lead to undeliverable messages.
1938 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1941 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1942 matters on fast-turnover and PID-randomising systems, which were getting
1943 out-of-order delivery.
1945 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1946 a possibly-overlapping copy. The symptom was that "Remote host closed
1947 connection in response to HELO" was logged instead of the actual 4xx
1950 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1951 Previously only that bufferd was discarded, resulting in SYMTP command
1954 JH/32 DKIM: when a message has multiple signatures matching an identity given
1955 in dkim_verify_signers, run the dkim acl once for each. Previously only
1956 one run was done. Bug 2189.
1958 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1959 "panic the current process" to "deliberately defer". The panic log is
1960 still written with the problem list name; the mail and reject logs now
1961 get a temp-reject line for the message that was being handled, saying
1962 something like "domains check lookup or other defer". The SMTP 451
1963 message is still "Temporary local problem".
1965 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1966 A crafted sequence of BDAT commands could result in in-use memory beeing
1967 freed. CVE-2017-16943.
1969 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1970 from SMTP input. Previously it was always done; now only done for DATA
1971 and not BDAT commands. CVE-2017-16944.
1973 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1974 to the message (such as an overlong header line). Previously this was
1975 not done and we did not exit BDAT mode. Followon from the previous item
1976 though a different problem.
1982 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1983 than -2003 did; needs libidn2 in addition to libidn.
1985 JH/02 The path option on a pipe transport is now expanded before use.
1987 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1988 Patch provided by "Björn", documentation fix added too.
1990 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1991 missing a wire-to-host endian conversion.
1993 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1994 close after a BDAT command line could be taken as a following command,
1995 giving a synch failure. Fix by only checking for synch immediately
1996 before acknowledging the chunk.
1998 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1999 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
2000 macro. Patches provided by Josh Soref.
2002 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
2003 Previously we did not; the RFC seems ambiguous and VRFY is not listed
2004 by IANA as a service extension. However, John Klensin suggests that we
2007 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
2008 the dkim code may be unix-mode line endings rather than smtp wire-format
2009 CRLF, so prepend a CR to any bare LF.
2011 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
2012 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
2014 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
2015 the first were themselves being wrongly included in the feed into dkim
2016 processing; with most chunk sizes in use this resulted in an incorrect
2017 body hash calculated value.
2019 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
2020 DKIM signature block, for verification. Although advised against by
2021 standards it is specifically not ruled illegal.
2023 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
2025 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
2026 missing a body hash (the bh= tag).
2028 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
2029 It seems that HAProxy sends the Proxy Protocol information in clear and
2030 only then does a TLS startup, so do the same.
2032 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
2033 TCP connections (such as for Spamd) unless the daemon successfully set
2034 Fast Open mode on its listening sockets. This fixes breakage seen on
2035 too-old kernels or those not configured for Fast Open, at the cost of
2036 requiring both directions being enabled for TFO, and TFO never being used
2037 by non-daemon-related Exim processes.
2039 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
2040 endings, at least on the first header line. Try to canonify any that get
2041 past that check, despite the cost.
2043 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
2044 now limited to an arbitrary five deep, while parsing addresses with the
2045 strip_excess_angle_brackets option enabled.
2047 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
2048 instead leave the unprompted TLS handshake in socket buffer for the
2049 TLS library to consume.
2051 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
2053 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
2055 JH/16 Drop variables when they go out of scope. Memory management drops a whole
2056 region in one operation, for speed, and this leaves assigned pointers
2057 dangling. Add checks run only under the testsuite which checks all
2058 variables at a store-reset and panics on a dangling pointer; add code
2059 explicitly nulling out all the variables discovered. Fixes one known
2060 bug: a transport crash, where a dangling pointer for $sending_ip_address
2061 originally assigned in a verify callout, is re-used.
2063 PP/06 Drop '.' from @INC in various Perl scripts.
2065 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2067 PP/08 Reduce a number of compilation warnings under clang; building with
2068 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2069 should be warning-free.
2071 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2073 HS/01 Fix portability problems introduced by PP/08 for platforms where
2074 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2076 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2077 chunk. This allows us to accept broken chunked messages. We need a more
2078 general solution here.
2080 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2081 already-broken messages in the queue.
2083 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2085 JH/19 Fix reference counting bug in routing-generated-address tracking.
2091 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2092 supports it and a size is available (ie. the sending peer gave us one).
2094 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2095 years of being deprecated). The replacements are the ACLs
2096 acl_smtp_mime and acl_not_smtp_mime.
2098 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2099 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2100 or even an in-clear connection were permitted. Now, if the host lookup
2101 was dnssec and dane was requested then the host is only used if the
2102 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2103 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2104 if one fails this test.
2105 This means that a poorly-configured remote DNS will make it incommunicado;
2106 but it protects against a DNS-interception attack on it.
2108 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2109 non-noisy when a race steals the message being considered.
2111 JH/05 If main configuration option tls_certificate is unset, generate a
2112 self-signed certificate for inbound TLS connections.
2114 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2115 in rewrites and routers.
2117 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2118 and logged a warning sing 4.83; now they are a configuration file error.
2120 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2121 (lacking @domain). Apply the same qualification processing as RCPT.
2123 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2125 JH/10 Support ${sha256:} applied to a string (as well as the previous
2128 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2129 a cutthrough deliver is pending, as we always want to make a connection.
2130 This also avoids re-routing the message when later placing the cutthrough
2131 connection after a verify cache hit.
2132 Do not update it with the verify result either.
2134 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2135 when routing results in more than one destination address.
2137 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2138 signing (which inhibits the cutthrough capability). Previously only
2139 the presence of an option was tested; now an expansion evaluating as
2140 empty is permissible (obviously it should depend only on data available
2141 when the cutthrough connection is made).
2143 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2144 the relevant preceding SMTP command did not note the pipelining mode.
2146 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2147 Previously they were not counted.
2149 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2150 as one having no matching records. Previously we deferred the message
2151 that needed the lookup.
2153 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2154 distinguished as "(=".
2156 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2157 for missing MX records. Previously it only worked for missing A records.
2159 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2161 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2162 after the data-go-ahead and data-ack. Patch from Jason Betts.
2164 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2165 even for a "none" policy. Patch from Tony Meyer.
2167 JH/22 Fix continued use of a connection for further deliveries. If a port was
2168 specified by a router, it must also match for the delivery to be
2171 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2172 When one of the recipients of a message was unsuitable for the connection
2173 (has no matching addresses), we lost track of needing to mark it
2174 deferred. As a result mail would be lost.
2176 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2178 JH/25 Decoding ACL controls is now done using a binary search; the source code
2179 takes up less space and should be simpler to maintain. Merge the ACL
2180 condition decode tables also, with similar effect.
2182 JH/26 Fix problem with one_time used on a redirect router which returned the
2183 parent address unchanged. A retry would see the parent address marked as
2184 delivered, so not attempt the (identical) child. As a result mail would
2187 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2188 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2189 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2192 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2193 Main config options check_{log,spool}_{inodes,space} are now
2194 100 inodes, 10MB unless set otherwise in the configuration.
2196 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2197 Previously it only applied to the main-section connection policy
2200 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2202 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2203 by me. Added RFC7919 DH primes as an alternative.
2205 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2206 are not in the system include path.
2208 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2209 GnuTLS, when a session startup failed (eg because the client disconnected)
2210 Exim did stdio operations after fclose. This was exposed by a recent
2211 change which nulled out the file handle after the fclose.
2213 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2214 signed directly by the cert-signing cert, rather than an intermediate
2215 OCSP-signing cert. This is the model used by LetsEncrypt.
2217 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2219 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2220 an incoming connection.
2222 HS/02 Bug 1802: Do not half-close the connection after sending a request
2225 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2226 fallback to "prime256v1".
2228 JH/34 SECURITY: Use proper copy of DATA command in error message.
2229 Could leak key material. Remotely exploitable. CVE-2016-9963.
2235 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2236 and 3.4.4 - once the server is enabled to respond to an OCSP request
2237 it does even when not requested, resulting in a stapling non-aware
2238 client dropping the TLS connection.
2240 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2241 support variable-length bit vectors. No functional change.
2243 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2244 The I= interface field on outgoing lines is now after the H= remote
2245 host field, same as incoming lines. There is a separate
2246 outgoing_interface log selector which allows you to disable the
2249 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2250 If not running log_selector +smtp_connection the mainlog would be held
2251 open indefinitely after a "too many connections" event, including to a
2252 deleted file after a log rotate. Leave the per net connection logging
2253 leaving it open for efficiency as that will be quickly detected by the
2254 check on the next write.
2256 HS/01 Bug 1671: Fix post transport crash.
2257 Processing the wait-<transport> messages could crash the delivery
2258 process if the message IDs didn't exist for some reason. When
2259 using 'split_spool_directory=yes' the construction of the spool
2260 file name failed already, exposing the same netto behaviour.
2262 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2263 mime_regex ACL conditions.
2265 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2266 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2267 to HELO, local diagnostic string.
2269 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2270 log line to debug. Even when configured with a tls authenticator many
2271 client connections are expected to not authenticate in this way, so
2272 an authenticate fail is not an error.
2274 HS/02 Add the Exim version string to the process info. This way exiwhat
2275 gives some more detail about the running daemon.
2277 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2278 matter for fast-change records such as DNSBLs.
2280 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2281 retry record, even if constant. There may be multiple transports with
2282 different interface settings and the retry behaviour needs to be kept
2285 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2287 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2289 JH/10 Bug 840: fix log_defer_output option of pipe transport
2291 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2292 hosts_randomize. This matters a lot when combined with mua_wrapper.
2294 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2295 ${quote_pgsql:<string>} operator.
2297 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2299 JH/14 Change header file name for freeradius-client. Relevant if compiling
2300 with Radius support; from the Gentoo tree and checked under Fedora.
2302 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2304 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2305 option transport_filter, meaning no filtering.
2307 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2309 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2310 defaults to "*" (all hosts). The variable is now available when not built
2311 with TLS, default unset, mainly to enable keeping the testsuite sane.
2312 If a server certificate is not supplied (via tls_certificate) an error is
2313 logged, and clients will find TLS connections fail on startup. Presumably
2314 they will retry in-clear.
2315 Packagers of Exim are strongly encouraged to create a server certificate
2316 at installation time.
2318 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2319 with the $config_file variable.
2321 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2322 in transport context, after the attempt, and per-recipient. The latter type
2323 is per host attempted. The event data is the error message, and the errno
2324 information encodes the lookup type (A vs. MX) used for the (first) host,
2325 and the trailing two digits of the smtp 4xx response.
2327 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2328 to write to mainlog (or rejectlog, paniclog) in the window between file
2329 creation and permissions/ownership being changed. Particularly affects
2330 installations where exicyclog is run as root, rather than exim user;
2331 result is that the running daemon panics and dies.
2333 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2335 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2336 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2337 "pri" and "weight". Note that the previous implicit priority given by the
2338 list order is no longer honoured.
2340 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2341 for DKIM processing.
2343 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2344 by defining SUPPORT_SOCKS.
2346 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2347 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2348 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2349 variables are renamed to proxy_{local,external}_{address,port}.
2351 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2352 for a build by defining SUPPORT_I18N
2354 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2355 of the query string, and make ${quote_redis:} do that quoting.
2357 JH/29 Move Events support from Experimental to mainline, enabled by default
2358 and removable for a build by defining DISABLE_EVENT.
2360 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2362 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2363 cached by the daemon.
2365 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2366 by defining LOOKUP_REDIS. The libhiredis library is required.
2368 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2369 keys are given for lookup.
2371 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2372 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2373 only supported when built with TLS support. The PolarSSL SHA routines
2374 are still used when the TLS library is too old for convenient support.
2376 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2377 openssl_options), for security. OpenSSL forces this from version 1.1.0
2378 server-side so match that on older versions.
2380 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2381 allocation for $value could be released as the expansion processing
2382 concluded, but leaving the global pointer active for it.
2384 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2385 and to use the domains and local_parts ACL conditions.
2387 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2388 incorrectly not doubled on cutthrough transmission, hence seen as a
2389 body-termination at the receiving system - resulting in truncated mails.
2390 Commonly the sender saw a TCP-level error, and retransmitted the message
2391 via the normal store-and-forward channel. This could result in duplicates
2392 received - but deduplicating mailstores were liable to retain only the
2393 initial truncated version.
2395 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2397 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2399 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2400 we're in there, support oversigning also; bug 1309.
2402 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2404 HS/04 Add support for keep_environment and add_environment options.
2406 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2407 either intentional arithmetic overflow during PRNG, or testing config-
2410 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2411 delivery resulted in actual delivery. Cancel cutthrough before DATA
2414 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2415 rejects a recipient: pass the reject to the originator.
2417 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2418 Many were false-positives and ignorable, but it's worth fixing the
2421 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2422 for the new environment-manipulation done at startup. Move the routines
2423 from being local to tls.c to being global via the os.c file.
2425 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2426 an extract embedded as result-arg for a map, the first arg for extract
2427 is unavailable so we cannot tell if this is a numbered or keyed
2428 extraction. Accept either.
2434 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2437 JH/02 The smtp transport option "multi_domain" is now expanded.
2439 JH/03 The smtp transport now requests PRDR by default, if the server offers
2442 JH/04 Certificate name checking on server certificates, when exim is a client,
2443 is now done by default. The transport option tls_verify_cert_hostnames
2444 can be used to disable this per-host. The build option
2445 EXPERIMENTAL_CERTNAMES is withdrawn.
2447 JH/05 The value of the tls_verify_certificates smtp transport and main options
2448 default to the word "system" to access the system default CA bundle.
2449 For GnuTLS, only version 3.0.20 or later.
2451 JH/06 Verification of the server certificate for a TLS connection is now tried
2452 (but not required) by default. The verification status is now logged by
2453 default, for both outbound TLS and client-certificate supplying inbound
2456 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2459 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2460 Status Notification (bounce) messages are now MIME format per RFC 3464.
2461 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2462 under the control of the dsn_advertise_hosts option, and routers may
2463 have a dsn_lasthop option.
2465 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2466 default, modifiable by a malware= option. The list separator for
2467 the options can now be changed in the usual way. Bug 68.
2469 JH/10 The smtp_receive_timeout main option is now expanded before use.
2471 JH/11 The incoming_interface log option now also enables logging of the
2472 local interface on delivery outgoing connections.
2474 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2475 if the interface and destination host and port all match.
2477 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2480 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2481 Patch from Andrew Lewis.
2483 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2484 now supports optional time-restrictions, weighting, and priority
2485 modifiers per server. Patch originally by <rommer@active.by>.
2487 JH/16 The spamd_address main option now supports a mixed list of local
2488 and remote servers. Remote servers can be IPv6 addresses, and
2489 specify a port-range.
2491 JH/17 Bug 68: The spamd_address main option now supports an optional
2492 timeout value per server.
2494 JH/18 Bug 1581: Router and transport options headers_add/remove can
2495 now have the list separator specified.
2497 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2500 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2503 JH/21 Support for the A6 type of dns record is withdrawn.
2505 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2506 rather than the verbs used.
2508 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2509 from 255 to 1024 chars.
2511 JH/24 Verification callouts now attempt to use TLS by default.
2513 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2514 are generic router options now. The defaults didn't change.
2516 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2517 Original patch from Alexander Shikoff, worked over by JH.
2519 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2520 files if ZCAT_COMMAND is not executable.
2522 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2524 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2526 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2527 Normally benign, it bites when the pair was led to by a CNAME;
2528 modern usage is to not canonicalize the domain to a CNAME target
2529 (and we were inconsistent anyway for A-only vs AAAA+A).
2531 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2533 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2534 when evaluating $sender_host_dnssec.
2536 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2537 $sender_helo_dnssec variable.
2539 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2541 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2543 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2545 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2546 documented as working, but never had. Support all but $spam_report.
2548 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2549 added for tls authenticator.
2551 HS/03 Add perl_taintmode main config option
2557 TL/01 When running the test suite, the README says that variables such as
2558 no_msglog_check are global and can be placed anywhere in a specific
2559 test's script, however it was observed that placement needed to be near
2560 the beginning for it to behave that way. Changed the runtest perl
2561 script to read through the entire script once to detect and set these
2562 variables, reset to the beginning of the script, and then run through
2563 the script parsing/test process like normal.
2565 TL/02 The BSD's have an arc4random API. One of the functions to induce
2566 adding randomness was arc4random_stir(), but it has been removed in
2567 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2568 function when detected.
2570 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2571 cause callback expansion.
2573 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2574 syntax errors in an expansion can be treated as a string instead of
2575 logging or causing an error, due to the internal use of bool_lax
2576 instead of bool when processing it.
2578 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2579 server certificates when making smtp deliveries.
2581 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2583 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2585 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2587 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2588 Merged patch from Sebastian Wiedenroth.
2590 JH/05 Fix results-pipe from transport process. Several recipients, combined
2591 with certificate use, exposed issues where response data items split
2592 over buffer boundaries were not parsed properly. This eventually
2593 resulted in duplicates being sent. This issue only became common enough
2594 to notice due to the introduction of connection certificate information,
2595 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2597 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2598 size buffer was used, resulting in syntax errors when an expansion
2601 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2602 version 3.3.6 or later.
2604 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2605 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2606 both become "event_action", the variables become $event_name, $event_data
2607 and $event_defer_errno. There is a new variable $verify_mode, usable in
2608 routers, transports and related events. The tls:cert event is now also
2609 raised for inbound connections, if the main configuration event_action
2612 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2613 early OCSP support, but no stapling (appears to be less than 1.0.0).
2615 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2616 server certificate names available under the smtp transport option
2617 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2620 JH/10 Time-related extraction expansions from certificates now use the main
2621 option "timezone" setting for output formatting, and are consistent
2622 between OpenSSL and GnuTLS compilations. Bug 1541.
2624 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2625 encoded parameter in the incoming message. Bug 1558.
2627 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2628 include certificate info, eximon was claiming there were spoolfile
2631 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2633 JH/14 Log delivery-related information more consistently, using the sequence
2634 "H=<name> [<ip>]" wherever possible.
2636 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2637 are problematic for Debian distribution, omit them from the release
2640 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2642 JH/16 Fix string representation of time values on 64bit time_t architectures.
2645 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2646 output list separator was used.
2651 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2652 checkers that were complaining about end of non-void function with no
2655 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2656 This was a regression introduced in 4.83 by another bugfix.
2658 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2660 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2661 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2667 TF/01 Correctly close the server side of TLS when forking for delivery.
2669 When a message was received over SMTP with TLS, Exim failed to clear up
2670 the incoming connection properly after forking off the child process to
2671 deliver the message. In some situations the subsequent outgoing
2672 delivery connection happened to have the same fd number as the incoming
2673 connection previously had. Exim would try to use TLS and fail, logging
2674 a "Bad file descriptor" error.
2676 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2677 utilities have not been installed.
2679 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2680 temporary space as the ACL may create new global variables.
2682 TL/01 LDAP support uses per connection or global context settings, depending
2683 upon the detected version of the libraries at build time.
2685 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2686 to extract and use the src ip:port in logging and expansions as if it
2687 were a direct connection from the outside internet. PPv2 support was
2688 updated based on HAProxy spec change in May 2014.
2690 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2692 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2693 Properly escape header and check for NULL return.
2695 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2698 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2700 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2701 characters in header names, implemented as a verify condition.
2702 Contributed by Michael Fischer v. Mollard.
2704 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2705 results permerror and temperror. Previous values are deprecated but
2706 still accepted. In a future release, err_perm and err_temp will be
2707 completely removed, which will be a backward incompatibility if the
2708 ACL tests for either of these two old results. Patch contributed by
2709 user bes-internal on the mailing list.
2711 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2713 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2714 selectors, in both main and reject logs.
2716 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2719 JH/07 Add malware type "sock" for talking to simple daemon.
2721 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2723 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2724 routers/transports under cutthrough routing.
2726 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2727 numbers. Touch up "bool" conditional to keep the same definition.
2729 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2731 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2733 JH/12 Expand items in router/transport headers_add or headers_remove lists
2734 individually rather than the list as a whole. Bug 1452.
2736 Required for reasonable handling of multiple headers_ options when
2737 they may be empty; requires that headers_remove items with embedded
2738 colons must have them doubled (or the list-separator changed).
2740 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2741 view the policy declared in the DMARC record. Currently, $dmarc_status
2742 is a combined value of both the record presence and the result of the
2745 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2747 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2748 dnslookup router and the smtp transport (applying to the forward
2751 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2752 of ldap servers used for a specific lookup. Patch provided by Heiko
2755 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2756 New variable $lookup_dnssec_authenticated for observability.
2758 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2759 Patch submitted by Lars Timman.
2761 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2763 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2764 Requires trusted mode and valid format message id, aborts otherwise.
2765 Patch contributed by Heiko Schlichting.
2767 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2768 certextract with support for various fields. Bug 1358.
2770 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2771 is requested by default, modifiable by smtp transport option
2774 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2775 operate on certificate variables to give certificate fingerprints
2776 Also new ${sha256:cert_variable}.
2778 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2780 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2781 Christian Aistleitner.
2783 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2785 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2786 file. Patch from Wolfgang Breyha.
2788 JH/25 Expand the coverage of the delivery $host and $host_address to
2789 client authenticators run in verify callout. Bug 1476.
2791 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2792 align with daemon_smtp_ports. Bug 72.
2794 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2795 support and error reporting did not work properly.
2797 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2798 and is readable. Patch from Andrew Colin Kissa.
2800 TL/14 Enhance documentation of ${run expansion and how it parses the
2801 commandline after expansion, particularly in the case when an
2802 unquoted variable expansion results in an empty value.
2804 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2806 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2807 by renaming away from it. Addresses GH issue 15, reported by
2810 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2812 TL/15 SECURITY: prevent double expansion in math comparison functions
2813 (can expand unsanitized data). Not remotely exploitable.
2820 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2822 PP/02 Make -n do something, by making it not do something.
2823 When combined with -bP, the name of an option is not output.
2825 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2828 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2829 $sender_host_name and config options to manage this, and basic check
2832 PP/05 DSCP support for outbound connections and control modifier for inbound.
2834 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2835 (Only plugin which currently uses this is kerberos4, which nobody should
2836 be using, but we should make it available and other future plugins might
2837 conceivably use it, even though it would break NAT; stuff *should* be
2838 using channel bindings instead).
2840 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2841 name; added for Sendmail compatibility; requires admin caller.
2842 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2843 just ignore it); requires trusted caller.
2844 Also parse but ignore: -Ac -Am -X<logfile>
2847 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2849 TL/02 Add +smtp_confirmation as a default logging option.
2851 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2852 Patch by Magnus Holmgren from 2007-02-20.
2854 TL/04 Bugzilla 1281 - Spec typo.
2855 Bugzilla 1283 - Spec typo.
2856 Bugzilla 1290 - Spec grammar fixes.
2858 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2860 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2862 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2863 mailing list by by Dmitry Isaikin.
2865 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2867 JH/02 Support "G" suffix to numbers in ${if comparisons.
2869 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2871 NM/01 Bugzilla 1197 - Spec typo
2872 Bugzilla 1196 - Spec examples corrections
2874 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2876 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2877 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2880 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2881 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2883 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2884 "acl {{name}{arg}...}", and optional args on acl condition
2887 JH/05 Permit multiple router/transport headers_add/remove lines.
2889 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2891 JH/07 Avoid using a waiting database for a single-message-only transport.
2892 Performance patch from Paul Fisher. Bugzilla 1262.
2894 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2897 JH/09 Add $headers_added variable, with content from use of ACL modifier
2898 add_header (but not yet added to the message). Bugzilla 199.
2900 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2901 Pulled from Bugzilla 817 by Wolfgang Breyha.
2903 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2905 (nb: this is the same fix as in Exim 4.80.1)
2907 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2910 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2913 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2915 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2916 advertise SMTP AUTH mechanism to us, instead of a generic
2917 protocol violation error. Also, make Exim more robust to bad
2918 data from the Dovecot auth socket.
2920 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2922 When a queue runner is handling a message, Exim first routes the
2923 recipient addresses, during which it prunes them based on the retry
2924 hints database. After that it attempts to deliver the message to
2925 any remaining recipients. It then updates the hints database using
2928 So if a recipient address works intermittently, it can get repeatedly
2929 deferred at routing time. The retry hints record remains fresh so the
2930 address never reaches the final cutoff time.
2932 This is a fairly common occurrence when a user is bumping up against
2933 their storage quota. Exim had some logic in its local delivery code
2934 to deal with this. However it did not apply to per-recipient defers
2935 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2937 This change adds a proper retry rule check during routing so that the
2938 final cutoff time is checked against the message's age. We only do
2939 this check if there is an address retry record and there is not a
2940 domain retry record; this implies that previous attempts to handle
2941 the address had the retry_use_local_parts option turned on. We use
2942 this as an approximation for the destination being like a local
2943 delivery, as in LMTP.
2945 I suspect this new check makes the old local delivery cutoff check
2946 redundant, but I have not verified this so I left the code in place.
2948 TF/02 Correct gecos expansion when From: is a prefix of the username.
2950 Test 0254 submits a message to Exim with the header
2954 When I ran the test suite under the user fanf2, Exim expanded
2955 the header to contain my full name, whereas it should have added
2956 a Resent-Sender: header. It erroneously treats any prefix of the
2957 username as equal to the username.
2959 This change corrects that bug.
2961 GF/01 DCC debug and logging tidyup
2962 Error conditions log to paniclog rather than rejectlog.
2963 Debug lines prefixed by "DCC: " to remove any ambiguity.
2965 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2967 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2968 Bug spotted by Jeremy Harris; was flawed since initial commit.
2969 Would have resulted in OCSP responses post-SNI triggering an Exim
2970 NULL dereference and crash.
2972 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2974 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2975 Bug detection, analysis and fix by Samuel Thibault.
2976 Bugzilla 1331, Debian bug #698092.
2978 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2980 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2981 Server implementation by Todd Lyons, client by JH.
2982 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2983 config variable "prdr_enable" controls whether the server
2984 advertises the facility. If the client requests PRDR a new
2985 acl_data_smtp_prdr ACL is called once for each recipient, after
2986 the body content is received and before the acl_smtp_data ACL.
2987 The client is controlled by both of: a hosts_try_prdr option
2988 on the smtp transport, and the server advertisement.
2989 Default client logging of deliveries and rejections involving
2990 PRDR are flagged with the string "PRDR".
2992 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2993 fclose(). Diagnosis by Todd Lyons.
2995 PP/17 Update configure.default to handle IPv6 localhost better.
2996 Patch by Alain Williams (plus minor tweaks).
2999 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
3000 This is now consistent with GnuTLS, and is now documented: the
3001 previous undocumented portable approach to treating the option as
3002 unset was to force an expansion failure. That still works, and
3003 an empty string is now equivalent.
3005 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
3006 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
3007 not performing validation itself.
3009 PP/20 Added force_command boolean option to pipe transport.
3010 Patch from Nick Koston, of cPanel Inc.
3012 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
3015 TF/04 Added udpsend ACL modifier and hexquote expansion operator
3017 PP/21 Fix eximon continuous updating with timestamped log-files.
3018 Broken in a format-string cleanup in 4.80, missed when I repaired the
3019 other false fix of the same issue.
3020 Report and fix from Heiko Schlichting.
3023 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
3024 Report from Prashanth Katuri.
3026 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
3027 It's SecureTransport, so affects any MacOS clients which use the
3028 system-integrated TLS libraries, including email clients.
3030 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
3031 using a MIME ACL for non-SMTP local injection.
3032 Report and assistance in diagnosis by Warren Baker.
3034 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
3036 JH/16 Fix comparisons for 64b. Bugzilla 1385.
3038 TL/09 Add expansion variable $authenticated_fail_id to keep track of
3039 last id that failed so it may be referenced in subsequent ACL's.
3041 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
3044 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
3045 ldap library initialization, allowing self-signed CA's to be
3046 used. Also properly sets require_cert option later in code by
3047 using NULL (global ldap config) instead of ldap handle (per
3048 session). Bug diagnosis and testing by alxgomz.
3050 TL/12 Enhanced documentation in the ratelimit.pl script provided in
3051 the src/util/ subdirectory.
3053 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
3054 renamed to Transport Post Delivery Action by Jeremy Harris, as
3057 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
3058 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
3059 redis_servers = needs to be configured which will be used by the redis
3060 lookup. Patch from Warren Baker, of The Packet Hub.
3062 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3064 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3065 hostname or reverse DNS when processing a host list. Used suggestions
3066 from multiple comments on this bug.
3068 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3070 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3071 Missed a few lines, added it to make the runtest require no keyboard
3074 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3075 contains upper case chars. Make router use caseful_local_part.
3077 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3078 support when GnuTLS has been built with p11-kit.
3084 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3086 This, or similar/improved, will also be change PP/11 of 4.82.
3092 PP/01 Handle short writes when writing local log-files.
3093 In practice, only affects FreeBSD (8 onwards).
3094 Bugzilla 1053, with thanks to Dmitry Isaikin.
3096 NM/01 Bugzilla 949 - Documentation tweak
3098 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3101 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3103 PP/02 Implemented gsasl authenticator.
3105 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3107 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3108 `pkg-config foo` for cflags/libs.
3110 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3111 with rest of GSASL and with heimdal_gssapi.
3113 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3114 `pkg-config foo` for cflags/libs for the TLS implementation.
3116 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3117 properties get this fed in as external SSF. A number of robustness
3118 and debugging improvements to the cyrus_sasl authenticator.
3120 PP/08 cyrus_sasl server now expands the server_realm option.
3122 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3123 Patch by Jeremy Harris.
3125 PP/10 Added dbmjz lookup type.
3127 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3129 PP/12 MAIL args handles TAB as well as SP, for better interop with
3130 non-compliant senders.
3131 Analysis and variant patch by Todd Lyons.
3133 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3134 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3135 Patch from Dirk Mueller <dmueller@suse.com>
3137 PP/13 tls_peerdn now print-escaped for spool files.
3138 Observed some $tls_peerdn in wild which contained \n, which resulted
3139 in spool file corruption.
3141 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3142 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3143 or write after TLS renegotiation, which otherwise led to messages
3146 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3147 as a tracking header (ie: a signed header comes before the signature).
3148 Patch from Wolfgang Breyha.
3150 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3151 comma-sep list; embedded commas doubled.
3153 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3155 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3157 Report and patch from Dmitry Banschikov.
3159 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3160 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3161 failures. We appear to now support TLS1.1+ with Exim.
3163 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3164 lets Exim select keys and certificates based upon TLS SNI from client.
3165 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3166 before an outbound SMTP session. New log_selector, +tls_sni.
3168 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3169 NULL dereference. Report and patch from Alun Jones.
3171 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3172 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3173 Not seeing resolver debug output on NetBSD, but suspect this is a
3174 resolver implementation change.
3176 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3177 Left warnings. Added "eximon gdb" invocation mode.
3179 PP/21 Defaulting "accept_8bitmime" to true, not false.
3181 PP/22 Added -bw for inetd wait mode support.
3183 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3184 locate the relevant includes and libraries. Made this the default.
3186 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3187 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3189 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3190 This may cause build issues on older platforms.
3192 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3193 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3194 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3195 Added SNI support via GnuTLS too.
3196 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3198 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3200 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3201 Applied second patch from Janne, implementing suggestion to default
3202 multiple-strings-in-record handling to match SPF spec.
3204 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3206 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3207 read-only, out of scope).
3208 Patch from Wolfgang Breyha, report from Stuart Northfield.
3210 PP/29 Fix three issues highlighted by clang analyser static analysis.
3211 Only crash-plausible issue would require the Cambridge-specific
3212 iplookup router and a misconfiguration.
3213 Report from Marcin Mirosław.
3215 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3217 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3218 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3219 As part of this, removing so much warning spew let me fix some minor
3220 real issues in debug logging.
3222 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3223 assignment on my part. Fixed.
3225 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3226 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3227 Janne Snabb (who went above and beyond: thank you).
3229 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3230 string otherwise requires a connection and a bunch more work and it's
3231 relatively easy to get wrong. Should also expose TLS library linkage
3234 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3235 64-bit ${eval} (JH/03).
3237 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3238 GNU libc to support some of the 64-bit stuff, should not lead to
3239 conflicts. Defined before os.h is pulled in, so if a given platform
3240 needs to override this, it can.
3242 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3243 protection layer was required, which is not implemented.
3244 Bugzilla 1254, patch from Wolfgang Breyha.
3246 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3247 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3248 tls_dhparam take prime identifiers. Also unbreak combination of
3249 OpenSSL+DH_params+TLSSNI.
3251 PP/39 Disable SSLv2 by default in OpenSSL support.
3257 PP/01 Solaris build fix for Oracle's LDAP libraries.
3258 Bugzilla 1109, patch from Stephen Usher.
3260 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3262 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3265 TF/02 Fix a couple more cases where we did not log the error message
3266 when unlink() failed. See also change 4.74-TF/03.
3268 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3269 lock up or crash if it happened to be inside a call to libc when it
3270 got a SIGUSR1 from exiwhat.
3272 The SIGUSR1 handler appends the current process status to the process
3273 log which is later printed by exiwhat. It used to use the general
3274 purpose logging code to do this, but several functions it calls are
3275 not safe for signals.
3277 The new output code in the SIGUSR1 handler is specific to the process
3278 log, and simple enough that it's easy to inspect for signal safety.
3279 Removing some special cases also simplifies the general logging code.
3280 Removing the spurious timestamps from the process log simplifies
3283 TF/04 Improved ratelimit ACL condition.
3285 The /noupdate option has been deprecated in favour of /readonly which
3286 has clearer semantics. The /leaky, /strict, and /readonly update modes
3287 are mutually exclusive. The update mode is no longer included in the
3288 database key; it just determines when the database is updated. (This
3289 means that when you upgrade Exim will forget old rate measurements.)
3291 Exim now checks that the per_* options are used with an update mode that
3292 makes sense for the current ACL. For example, when Exim is processing a
3293 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3294 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3295 must specify per_mail/readonly. If you omit the update mode it defaults to
3296 /leaky where that makes sense (as before) or /readonly where required.
3298 The /noupdate option is now undocumented but still supported for
3299 backwards compatibility. It is equivalent to /readonly except that in
3300 ACLs where /readonly is required you may specify /leaky/noupdate or
3301 /strict/noupdate which are treated the same as /readonly.
3303 A useful new feature is the /count= option. This is a generalization
3304 of the per_byte option, so that you can measure the throughput of other
3305 aggregate values. For example, the per_byte option is now equivalent
3306 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3308 The per_rcpt option has been generalized using the /count= mechanism
3309 (though it's more complicated than the per_byte equivalence). When it is
3310 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3311 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3312 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3313 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3314 Note that using per_rcpt with a non-readonly update mode in more than
3315 one ACL will cause the recipients to be double-counted. (The per_mail
3316 and per_byte options don't have this problem.)
3318 The handling of very low rates has changed slightly. If the computed rate
3319 is less than the event's count (usually one) then this event is the first
3320 after a long gap. In this case the rate is set to the same as this event's
3321 count, so that the first message of a spam run is counted properly.
3323 The major new feature is a mechanism for counting the rate of unique
3324 events. The new per_addr option counts the number of different
3325 recipients that someone has sent messages to in the last time period. It
3326 behaves like per_rcpt if all the recipient addresses are different, but
3327 duplicate recipient addresses do not increase the measured rate. Like
3328 the /count= option this is a general mechanism, so the per_addr option
3329 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3330 example, measure the rate that a client uses different sender addresses
3331 with the options per_mail/unique=$sender_address. There are further
3332 details in the main documentation.
3334 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3336 TF/06 Removed a few PCRE remnants.
3338 TF/07 Automatically extract Exim's version number from tags in the git
3339 repository when doing development or release builds.
3341 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3342 Bugzilla 879. Patch from Paul Fisher.
3344 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3345 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3348 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3350 PP/05 Variable $av_failed, true if the AV scanner deferred.
3351 Bugzilla 1078. Patch from John Horne.
3353 PP/06 Stop make process more reliably on build failure.
3354 Bugzilla 1087. Patch from Heiko Schlittermann.
3356 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3357 Bugzilla 1089. Patch from Heiko Schlittermann.
3359 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3360 Bugzilla 1131. Patch from Holger Weiß.
3362 PP/09 Handle IPv6 addresses with SPF.
3363 Bugzilla 860. Patch from Wolfgang Breyha.
3365 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3367 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3370 PP/11 match_* no longer expand right-hand-side by default.
3371 New compile-time build option, EXPAND_LISTMATCH_RHS.
3372 New expansion conditions, "inlist", "inlisti".
3374 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3376 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3378 PP/14 fix log_write() format string regression from TF/03.
3379 Bugzilla 1152. Patch from Dmitry Isaikin.
3385 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3387 PP/02 Harmonised TLS library version reporting; only show if debugging.
3388 Layout now matches that introduced for other libraries in 4.74 PP/03.
3390 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3392 PP/04 New "dns_use_edns0" global option.
3394 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3397 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3398 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3400 TK/01 Updated PolarSSL code to 0.14.2.
3401 Bugzilla 1097. Patch from Andreas Metzler.
3403 PP/07 Catch divide-by-zero in ${eval:...}.
3404 Fixes bugzilla 1102.
3406 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3409 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3410 format-string attack -- SECURITY: remote arbitrary code execution.
3412 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3413 time unintentionally subject to list matching rules, letting the header
3414 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3415 arbitrary string expansion). This allowed for information disclosure.
3417 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3418 INT_MIN/-1 -- value coerced to INT_MAX.
3424 NM/01 Workaround for PCRE version dependency in version reporting
3427 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3428 This fixes portability to compilers other than gcc, notably
3429 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3431 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3432 makefiles for portability to HP-UX and POSIX correctness.
3434 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3435 Also via indented variable definition in the Makefile.
3436 (Debugging by Oliver Heesakkers).
3438 PP/02 Restore caching of spamd results with expanded spamd_address.
3439 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3441 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3442 Improves build reliability. Fix from: Frank Elsner
3444 NM/02 Fix wide character breakage in the rfc2047 coding
3445 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3447 NM/03 Allow underscore in dnslist lookups
3448 Fixes bug 1026. Patch from Graeme Fowler
3450 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3451 Code patches from Adam Ciarcinski of NetBSD.
3453 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3456 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3457 is logged, to avoid truncation. Patch from John Horne.
3459 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3460 Patch from Jakob Hirsch.
3462 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3463 SQL string expansion failure details.
3464 Patch from Andrey Oktyabrski.
3466 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3467 Patch from Simon Arlott.
3469 PP/09 New lookups functionality failed to compile on old gcc which rejects
3470 extern declarations in function scope.
3471 Patch from Oliver Fleischmann
3473 PP/10 Use sig_atomic_t for flags set from signal handlers.
3474 Check getgroups() return and improve debugging.
3475 Fixed developed for diagnosis in bug 927 (which turned out to be
3478 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3479 Patch from Mark Zealey.
3481 PP/12 Bugzilla 1056: Improved spamd server selection.
3482 Patch from Mark Zealey.
3484 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3485 Based on patch from Heiko Schlittermann.
3487 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3488 Patch from Uwe Doering, sign-off by Michael Haardt.
3490 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3491 variable declaration deep within a block. Bug and patch from
3494 PP/15 lookups-Makefile IRIX compatibility coercion.
3496 PP/16 Make DISABLE_DKIM build knob functional.
3498 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3499 Patch by Simon Arlott
3501 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3502 variable argument macros. Our copy now differs from upstream.
3508 TF/01 Failure to get a lock on a hints database can have serious
3509 consequences so log it to the panic log.
3511 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3512 controlled using the smtp_confirmation log selector.
3514 TF/03 Include the error message when we fail to unlink a spool file.
3516 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3517 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3518 for maintaining out-of-tree patches for some time.
3520 PP/01 Bugzilla 139: Documentation and portability issues.
3521 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3522 Handle per-OS dynamic-module compilation flags.
3524 PP/02 Let /dev/null have normal permissions.
3525 The 4.73 fixes were a little too stringent and complained about the
3526 permissions on /dev/null. Exempt it from some checks.
3527 Reported by Andreas M. Kirchwitz.
3529 PP/03 Report version information for many libraries, including
3530 Exim version information for dynamically loaded libraries. Created
3531 version.h, now support a version extension string for distributors
3532 who patch heavily. Dynamic module ABI change.
3534 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3535 privilege escalation vulnerability whereby the Exim run-time user
3536 can cause root to append content of the attacker's choosing to
3539 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3542 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3543 If dropping privileges for untrusted macros, we disabled normal logging
3544 on the basis that it would fail; for the Exim run-time user, this is not
3545 the case, and it resulted in successful deliveries going unlogged.
3546 Fixed. Reported by Andreas Metzler.
3552 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3553 only prepend for the Resent-* case. Fixes regression introduced in
3554 Exim 4.70 by NM/22 for Bugzilla 607.
3556 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3557 increasing numbers of administrators be bitten by this.
3559 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3561 PP/03 Bugzilla 994: added openssl_options main configuration option.
3563 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3565 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3567 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3569 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3570 without a peer certificate, leading to a segfault because of an
3571 assumption that peers always have certificates. Be a little more
3572 paranoid. Problem reported by Martin Tscholak.
3574 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3575 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3576 NB: ClamAV planning to remove STREAM in "middle of 2010".
3577 CL also introduces -bmalware, various -d+acl logging additions and
3578 more caution in buffer sizes.
3580 PP/09 Implemented reverse_ip expansion operator.
3582 PP/10 Bugzilla 937: provide a "debug" ACL control.
3584 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3586 PP/12 Bugzilla 973: Implement --version.
3588 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3590 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3592 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3594 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3595 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3596 ignore trailing whitespace.
3598 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3600 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3603 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3604 Notification from Dr Andrew Aitchison.
3606 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3607 ExtendedDetectionInfo response format.
3608 Notification from John Horne.
3610 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3613 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3614 XSL and documented dependency on system catalogs, with examples of how
3617 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3620 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3621 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3622 configuration file which is writeable by the Exim user or group.
3624 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3625 of configuration files to cover files specified with the -C option if
3626 they are going to be used with root privileges, not just the default
3629 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3630 option (effectively making it always true).
3632 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3633 files to be used while preserving root privileges.
3635 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3636 that rogue child processes cannot use them.
3638 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3639 run-time user, instead of root.
3641 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3642 Exim run-time user without dropping privileges.
3644 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3645 result string, instead of calling string_vformat() twice with the same
3648 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3649 for other users. Others should always drop root privileges if they use
3650 -C on the command line, even for a whitelisted configure file.
3652 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3654 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3660 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3661 $data_path, and $header_path variables; fixed documentation bugs and
3664 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3665 exipick to access non-standard spools, including the "frozen" queue
3668 NM/01 Bugzilla 965: Support mysql stored procedures.
3669 Patch from Alain Williams
3671 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3673 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3674 Patch from Andreas Metzler
3676 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3677 Patch from Kirill Miazine
3679 NM/05 Bugzilla 671: Added umask to procmail example.
3681 JJ/03 installed exipick 20100323.0, fixing doc bug
3683 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3684 directory. Notification and patch from Dan Rosenberg.
3686 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3688 TK/02 Improve log output when DKIM signing operation fails.
3690 MH/01 Treat the transport option dkim_domain as a colon separated
3691 list, not as a single string, and sign the message with each element,
3692 omitting multiple occurences of the same signer.
3694 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3695 Bugzilla 985, 986. Patch by Simon Arlott
3697 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3698 Patch by Simon Arlott
3700 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3701 MBX locking. Notification from Dan Rosenberg.
3707 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3709 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3711 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3713 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3715 NM/04 Bugzilla 915: Flag broken perl installation during build.
3721 TK/01 Added patch by Johannes Berg that expands the main option
3722 "spamd_address" if it starts with a dollar sign.
3724 TK/02 Write list of recipients to X-Envelope-Sender header when building
3725 the mbox-format spool file for content scanning (suggested by Jakob
3728 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3729 (http://www.dcc-servers.net/) support via dccifd. Activated by
3730 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3732 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3733 by Mark Daniel Reidel <mr@df.eu>.
3735 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3736 When building exim an external PCRE library is now needed -
3737 PCRE is a system library on the majority of modern systems.
3738 See entry on PCRE_LIBS in EDITME file.
3740 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3741 conversation. Added nologin parameter to request.
3742 Patch contributed by Kirill Miazine.
3744 TF/01 Do not log submission mode rewrites if they do not change the address.
3746 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3748 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3749 log files in place. Contributed by Roberto Lima.
3751 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3753 TF/03 Bugzilla 615: When checking the local_parts router precondition
3754 after a local_part_suffix or local_part_prefix option, Exim now
3755 does not use the address's named list lookup cache, since this
3756 contains cached lookups for the whole local part.
3758 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3759 Robert Millan. Documentation is in experimental-spec.txt.
3761 TF/04 Bugzilla 668: Fix parallel build (make -j).
3763 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3765 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3766 Patch provided by Jan Srzednicki.
3768 TF/05 Leading white space used to be stripped from $spam_report which
3769 wrecked the formatting. Now it is preserved.
3771 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3772 that they are available at delivery time.
3774 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3776 TF/08 TLS error reporting now respects the incoming_interface and
3777 incoming_port log selectors.
3779 TF/09 Produce a more useful error message if an SMTP transport's hosts
3780 setting expands to an empty string.
3782 NM/06 Bugzilla 744: EXPN did not work under TLS.
3783 Patch provided by Phil Pennock.
3785 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3786 Patch provided by Richard Godbee.
3788 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3789 acl_smtp_notquit, added index entry.
3791 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3792 Patch provided by Eugene Bujak.
3794 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3795 accept(). Patch provided by Maxim Dounin.
3797 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3798 Patch provided by Phil Pennock.
3800 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3802 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3803 Patch provided by Brad "anomie" Jorsch.
3805 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3806 Patch provided by Dean Brooks.
3808 TK/05 Add native DKIM support (does not depend on external libraries).
3810 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3811 Patch provided by Graeme Fowler.
3813 NM/16 Bugzilla 851: Documentation example syntax fix.
3815 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3817 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3820 NM/19 Bugzilla 745: TLS version reporting.
3821 Patch provided by Phil Pennock.
3823 NM/20 Bugzilla 167: bool: condition support.
3824 Patch provided by Phil Pennock.
3826 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3827 clients. Patch provided by Phil Pennock.
3829 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3830 Patch provided by Brad "anomie" Jorsch.
3832 NM/23 Bugzilla 687: Fix misparses in eximstats.
3833 Patch provided by Heiko Schlittermann.
3835 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3836 Patch provided by Heiko Schlittermann.
3838 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3839 plus update to original patch.
3841 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3843 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3844 Patch provided by David Brownlee.
3846 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3848 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3850 NM/30 Bugzilla 888: TLS documentation bugfixes.
3852 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3854 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3855 Unlike the original bugzilla I have changed all shell scripts in src tree.
3857 NM/33 Bugzilla 898: Transport filter timeout fix.
3858 Patch by Todd Rinaldo.
3860 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3861 Patch by Serge Demonchaux.
3863 NM/35 Bugzilla 39: Base64 decode bug fixes.
3864 Patch by Jakob Hirsch.
3866 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3868 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3870 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3872 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3878 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3879 ALT-N's libdkim that I have put here:
3880 http://duncanthrax.net/exim-experimental/
3882 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3883 were called 'true' and it seems that C99 defines that as a reserved
3884 keyword to be used with 'bool' variable types. That means you could
3885 not include C99-style headers which use bools without triggering
3886 build errors in sieve.c.
3888 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3889 as mailq or other aliases. Changed the --help handling significantly
3890 to do whats expected. exim_usage() emits usage/help information.
3892 SC/01 Added the -bylocaldomain option to eximstats.
3894 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3896 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3898 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3904 PH/01 Another patch from the Sieve maintainer.
3906 PH/02 When an IPv6 address is converted to a string for single-key lookup
3907 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3908 dots are used instead of colons so that keys in lsearch files need not
3909 contain colons. This was done some time before quoting was made available
3910 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3911 (notated using the quote facility) so as to distinguish them from IPv4
3912 keys. This meant that lookups for IP addresses in host lists did not work
3913 for iplsearch lookups.
3915 This has been fixed by arranging for IPv6 addresses to be expressed with
3916 colons if the lookup type is iplsearch. This is not incompatible, because
3917 previously such lookups could never work.
3919 The situation is now rather anomalous, since one *can* have colons in
3920 ordinary lsearch keys. However, making the change in all cases is
3921 incompatible and would probably break a number of configurations.
3923 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3926 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3927 conversion specification without a maximum field width, thereby enabling
3928 a rogue spamd server to cause a buffer overflow. While nobody in their
3929 right mind would setup Exim to query an untrusted spamd server, an
3930 attacker that gains access to a server running spamd could potentially
3931 exploit this vulnerability to run arbitrary code as the Exim user.
3933 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3934 $primary_hostname instead of what libspf2 thinks the hosts name is.
3936 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3937 a directory entry by the name of the lookup key. Previously, if a
3938 symlink pointed to a non-existing file or a file in a directory that
3939 Exim lacked permissions to read, a lookup for a key matching that
3940 symlink would fail. Now it is enough that a matching directory entry
3941 exists, symlink or not. (Bugzilla 503.)
3943 PH/03 The body_linecount and body_zerocount variables are now exported in the
3946 PH/04 Added the $dnslist_matched variable.
3948 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3949 This means they are set thereafter only if the connection becomes
3952 PH/06 Added the client_condition to authenticators so that some can be skipped
3953 by clients under certain conditions.
3955 PH/07 The error message for a badly-placed control=no_multiline_responses left
3956 "_responses" off the end of the name.
3958 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3960 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3961 (without spaces) instead of just copying the configuration text.
3963 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3965 PH/11 Added $max_received_linelength.
3967 PH/12 Added +ignore_defer and +include_defer to host lists.
3969 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3970 way in which PCRE > 7.0 is built.
3972 PH/14 Implemented queue_only_load_latch.
3974 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3975 MAIL command. The effect was to mangle the value on 64-bit systems.
3977 PH/16 Another patch from the Sieve maintainer.
3979 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3981 PH/18 If a system quota error occurred while trying to create the file for
3982 a maildir delivery, the message "Mailbox is full" was not appended to the
3983 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3984 only to a quota excession during the actual writing of the file.
3986 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3987 characters?) which causes problems in log lines. The DN values are now
3988 passed through string_printing() before being added to log lines.
3990 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3991 and InterBase are left for another time.)
3993 PH/21 Added message_body_newlines option.
3995 PH/22 Guard against possible overflow in moan_check_errorcopy().
3997 PH/23 POSIX allows open() to be a macro; guard against that.
3999 PH/24 If the recipient of an error message contained an @ in the local part
4000 (suitably quoted, of course), incorrect values were put in $domain and
4001 $local_part during the evaluation of errors_copy.
4007 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
4008 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
4011 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
4012 issue a MAIL command.
4014 PH/02 In an ACL statement such as
4016 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
4018 if a client was not listed at all, or was listed with a value other than
4019 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
4020 the condition was not true (as it should be), so access was not denied.
4021 The bug was that the ! inversion was incorrectly passed on to the second
4022 item. This has been fixed.
4024 PH/03 Added additional dnslists conditions == and =& which are different from
4025 = and & when the dns lookup returns more than one IP address.
4027 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
4028 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
4030 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
4031 FSYNC, which compiles an option called disable_fsync that allows for
4032 bypassing fsync(). The documentation is heavily laced with warnings.
4034 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
4036 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
4037 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
4038 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
4039 including adding "make clean"; (3) Added -fPIC when compiling the test
4040 dynamically loaded module, to get rid of a warning.
4042 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
4043 message fails, move_frozen_messages = true and ignore_bounce_errors_after
4044 = 0s. The bug is otherwise harmless.
4046 PH/07 There was a bug in the dovecot authenticator such that the value of
4047 $auth1 could be overwritten, and so not correctly preserved, after a
4048 successful authentication. This usually meant that the value preserved by
4049 the server_setid option was incorrect.
4051 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
4053 PH/09 Installed PCRE release 7.0.
4055 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
4056 run for batched SMTP input. It is now run at the start of every message
4057 in the batch. While fixing this I discovered that the process information
4058 (output by running exiwhat) was not always getting set for -bs and -bS
4059 input. This is fixed, and it now also says "batched" for BSMTP.
4061 PH/11 Added control=no_pipelining.
4063 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4064 patch, slightly modified), and move the expansion of helo_data till after
4065 the connection is made in the smtp transport (so it can use these
4068 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4070 PH/14 Added log_selector = +pid.
4072 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4074 PH/16 Add ${if forany and ${if forall.
4076 PH/17 Added dsn_from option to vary the From: line in DSNs.
4078 PH/18 Flush SMTP output before performing a callout, unless control =
4079 no_callout_flush is set.
4081 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4082 was true (the default) a successful delivery failed to delete the retry
4083 item, thus causing premature timeout of the address. The bug is now
4086 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4088 PH/21 Long custom messages for fakedefer and fakereject are now split up
4089 into multiline responses in the same way that messages for "deny" and
4090 other ACL rejections are.
4092 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4093 with slight modification.
4095 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4096 draft, changing the syntax and factoring some duplicate code".
4098 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4099 for deliveries of the second and subsequent messages over the same SMTP
4102 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4103 ${reduce, with only minor "tidies".
4105 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4107 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4108 expansion side effects.
4110 PH/27 When a message times out after an over-quota error from an Exim-imposed
4111 quota, the bounce message says "mailbox is full". This message was not
4112 being given when it was a system quota that was exceeded. It now should
4115 MH/03 Made $recipients available in local_scan(). local_scan() already has
4116 better access to the recipient list through recipients_list[], but
4117 $recipients can be useful in postmaster-provided expansion strings.
4119 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4120 in the case of a MAIL command with additional options following the
4121 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4122 were accidentally chopped off.
4124 PH/29 SMTP synchronization checks are implemented when a command is read -
4125 there is a check that no more input is waiting when there shouldn't be
4126 any. However, for some commands, a delay in an ACL can mean that it is
4127 some time before the response is written. In this time, more input might
4128 arrive, invalidly. So now there are extra checks after an ACL has run for
4129 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4130 pipelining has not been advertised.
4132 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4134 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4135 returned in the SMTP response when smtp_return_error_details was false.
4136 This has been fixed.
4138 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4139 instead of the C I/O that was originally supplied, because problems were
4140 reported on Solaris.
4142 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4143 Exim which did not show up earlier: it was assuming that a call to
4144 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4145 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4146 was a macro that became an assignment, so it seemed to work. This has
4147 changed to a proper function call with a void return, hence the compile
4148 error. Exim's code has been fixed.
4150 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4153 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4155 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4157 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4158 because it turns out to be too big or there is a timeout) there is no
4159 "Completed" line in the log. When some messages of this type were
4160 selected by exigrep, they were listed as "not completed". Others were
4161 picked up by some special patterns. I have improved the selection
4162 criteria to be more general.
4164 PH/38 The host_find_failed option in the manualroute router can now be set
4165 to "ignore", to completely ignore a host whose IP address cannot be
4166 found. If all hosts are ignored, the behaviour is controlled by the new
4167 host_all_ignored option.
4169 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4170 homing or because of multiple MX records with /mx) generated more than
4171 one IP address, and the following item turned out to be the local host,
4172 all the secondary addresses of the first item were incorrectly removed
4173 from the list, along with the local host and any following hosts (which
4174 is what is supposed to happen).
4176 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4177 whoever called Exim into the -H file. In the case of the daemon it was
4178 behaving confusingly. When first started, it used values for whoever
4179 started the daemon, but after a SIGHUP it used the Exim user (because it
4180 calls itself on a restart). I have changed the code so that it now always
4183 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4184 message are rejected with the same error (e.g. no authentication or bad
4185 sender address), and a DATA command is nevertheless sent (as can happen
4186 with PIPELINING or a stupid MUA), the error message that was given to the
4187 RCPT commands is included in the rejection of the DATA command. This is
4188 intended to be helpful for MUAs that show only the final error to their
4191 PH/42 Another patch from the Sieve maintainer.
4193 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4194 Eximstats - Fixed some broken HTML links and added missing column headers
4196 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4197 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4199 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4201 PH/43 Yet another patch from the Sieve maintainer.
4203 PH/44 I found a way to check for a TCP/IP connection going away before sending
4204 the response to the final '.' that terminates a message, but only in the
4205 case where the client has not sent further data following the '.'
4206 (unfortunately, this is allowed). However, in many cases there won't be
4207 any further data because there won't be any more messages to send. A call
4208 to select() can be used: if it shows that the input is "ready", there is
4209 either input waiting, or the socket has been closed. An attempt to read
4210 the next input character can distinguish the two cases. Previously, Exim
4211 would have sent an OK response which the client would never have see.
4212 This could lead to message repetition. This fix should cure that, at
4213 least in a lot of common cases.
4215 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4216 advertised in response to EHLO.
4222 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4223 fixed by 4.65/MH/01 (is this a record?) are fixed:
4225 (i) An empty string was always treated as zero by the numeric comparison
4226 operators. This behaviour has been restored.
4228 (ii) It is documented that the numeric comparison operators always treat
4229 their arguments as decimal numbers. This was broken in that numbers
4230 starting with 0 were being interpreted as octal.
4232 While fixing these problems I realized that there was another issue that
4233 hadn't been noticed. Values of message_size_limit (both the global option
4234 and the transport option) were treated as octal if they started with 0.
4235 The documentation was vague. These values are now always treated as
4236 decimal, and I will make that clear in the documentation.
4242 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4243 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4246 MH/01 Don't check that the operands of numeric comparison operators are
4247 integers when their expansion is in "skipping" mode (fixes bug
4248 introduced by 4.64-PH/07).
4250 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4251 child addresses, Exim now panics and dies. Previously, because the count
4252 is held in a short int, deliveries were likely to be lost. As such a
4253 large number of recipients for a single message is ridiculous
4254 (performance will be very, very poor), I have chosen to impose a limit
4255 rather than extend the field.
4261 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4262 leftover -K file (the existence of which was triggered by #402).
4263 While we were at it, introduced process PID as part of the -K
4264 filename. This should rule out race conditions when creating
4267 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4268 processing considerably. Previous code took too long for large mails,
4269 triggering a timeout which in turn triggers #401.
4271 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4272 in the DK code in transports.c. sendfile() is not really portable,
4273 hence the _LINUX specificness.
4275 TF/01 In the add_headers option to the mail command in an Exim filter,
4276 there was a bug that Exim would claim a syntax error in any
4277 header after the first one which had an odd number of characters
4280 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4281 callout verification, Exim cached a "reject" for the entire domain. This
4282 is correct for most verifications, but it is not correct for a recipient
4283 verification with use_sender or use_postmaster set, because in that case
4284 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4285 case of MAIL FROM:<> rejection from other early rejections (e.g.
4286 rejection of HELO). When verifying a recipient using a non-null MAIL
4287 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4288 Whatever the result of the callout, the value of the domain cache is
4289 left unchanged (for any other kind of callout, getting as far as trying
4290 RCPT means that the domain itself is ok).
4292 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4295 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4296 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4297 session, the daemon ignores ECONNECT errors and logs others; it now
4298 ignores EPIPE as well.
4300 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4301 (quoted-printable decoding).
4303 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4304 later the small subsequent patch to fix an introduced bug.
4306 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4308 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4310 PH/08 An error is now given if message_size_limit is specified negative.
4312 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4313 to be given (somewhat) arbitrary names.
4315 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4318 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4319 miscellaneous code fixes
4321 PH/10 Added the log_reject_target ACL modifier to specify where to log
4324 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4325 hostname. This is wrong, because it relates to the incoming message (and
4326 probably the interface on which it is arriving) and not to the outgoing
4327 callout (which could be using a different interface). This has been
4328 changed to use the value of the helo_data option from the smtp transport
4329 instead - this is what is used when a message is actually being sent. If
4330 there is no remote transport (possible with a router that sets up host
4331 addresses), $smtp_active_hostname is used.
4333 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4334 tweaks were necessary in order to get it to work (see also 21 below):
4335 (a) The code assumed that strncpy() returns a negative number on buffer
4336 overflow, which isn't the case. Replaced with Exim's string_format()
4338 (b) There were several signed/unsigned issues. I just did the minimum
4339 hacking in of casts. There is scope for a larger refactoring.
4340 (c) The code used strcasecmp() which is not a standard C function.
4341 Replaced with Exim's strcmpic() function.
4342 (d) The code set only $1; it now sets $auth1 as well.
4343 (e) A simple test gave the error "authentication client didn't specify
4344 service in request". It would seem that Dovecot has changed its
4345 interface. Fortunately there's a specification; I followed it and
4346 changed what the client sends and it appears to be working now.
4348 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4351 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4352 address A is aliased to B and C, where B exists and C does not. Without
4353 -v the output is "A verified" because verification stops after a
4354 successful redirection if more than one address is generated. However,
4355 with -v the child addresses are also verified. Exim was outputting "A
4356 failed to verify" and then showing the successful verification for C,
4357 with its parentage. It now outputs "B failed to verify", showing B's
4358 parentage before showing the successful verification of C.
4360 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4361 look up a TXT record in a specific list after matching in a combined
4364 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4365 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4366 they consult the DNS. I had assumed they would set it the way they
4367 wanted; and indeed my experiments on Linux seem to show that in some
4368 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4369 To be on the safe side, however, I have now made the interface to
4370 host_find_byname() similar to host_find_bydns(), with an argument
4371 containing the DNS resolver options. The host_find_byname() function now
4372 sets these options at its start, just as host_find_bydns() does. The smtp
4373 transport options dns_qualify_single and dns_search_parents are passed to
4374 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4375 of host_find_byname() use the default settings of RES_DEFNAMES
4376 (qualify_single) but not RES_DNSRCH (search_parents).
4378 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4379 spool_read_header() do less string testing, by means of a preliminary
4380 switch on the second character of optional "-foo" lines. (This is
4381 overdue, caused by the large number of possibilities that now exist.
4382 Originally there were few.) While I was there, I also converted the
4383 str(n)cmp tests so they don't re-test the leading "-" and the first
4384 character, in the hope this might squeeze out yet more improvement.
4386 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4387 flag allowing group syntax was set by the header_syntax check but not
4388 turned off, possible causing trouble later; (2) The flag was not being
4389 set at all for the header_verify test, causing "group"-style headers to
4390 be rejected. I have now set it in this case, and also caused header_
4391 verify to ignore an empty address taken from a group. While doing this, I
4392 came across some other cases where the code for allowing group syntax
4393 while scanning a header line wasn't quite right (mostly, not resetting
4394 the flag correctly in the right place). These bugs could have caused
4395 trouble for malformed header lines. I hope it is now all correct.
4397 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4398 with the "reply" argument non-NULL. The code, however (which originally
4399 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4400 but it didn't always do it. This confused somebody who was copying the
4401 code for some other use. I have removed all the tests.
4403 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4404 feature that was used to support insecure browsers during the U.S. crypto
4405 embargo. It requires special client support, and Exim is probably the
4406 only MTA that supported it -- and would never use it because real RSA is
4407 always available. This code has been removed, because it had the bad
4408 effect of slowing Exim down by computing (never used) parameters for the
4409 RSA_EXPORT functionality.
4411 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4412 authenticator to fail if there's a tab character in the incoming data
4413 (there should never be unless someone is messing about, as it's supposed
4414 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4415 if the connection is using TLS or if the remote IP is the same as the
4416 local IP, and the "valid-client-cert option" if a client certificate has
4419 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4420 authenticators. This can be used for authorization after authentication
4421 succeeds. (In the case of plaintext, it servers for both authentication
4424 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4425 if any retry times were supplied.
4427 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4428 connection, where there is no client IP address to check. In this
4429 situation, the verify now always succeeds.
4431 PH/25 Applied John Jetmore's -Mset patch.
4433 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4435 PH/27 In a string expansion for a processed (not raw) header when multiple
4436 headers of the same name were present, leading whitespace was being
4437 removed from all of them, but trailing whitespace was being removed only
4438 from the last one. Now trailing whitespace is removed from each header
4439 before concatenation. Completely empty headers in a concatenation (as
4440 before) are ignored.
4442 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4443 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4445 PH/29 [Removed. This was a change that I later backed out, and forgot to
4446 correct the ChangeLog entry (that I had efficiently created) before
4447 committing the later change.]
4449 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4450 address errors (4xx response to RCPT) over the same connection as other
4451 messages routed to the same hosts. Such deliveries are always "forced",
4452 so retry times are not inspected. This resulted in far too many retries
4453 for the affected addresses. The effect occurred only when there were more
4454 hosts than the hosts_max_try setting in the smtp transport when it had
4455 the 4xx errors. Those hosts that it had tried were not added to the list
4456 of hosts for which the message was waiting, so if all were tried, there
4457 was no problem. Two fixes have been applied:
4459 (i) If there are any address or message errors in an SMTP delivery, none
4460 of the hosts (tried or untried) are now added to the list of hosts
4461 for which the message is waiting, so the message should not be a
4462 candidate for sending over the same connection that was used for a
4463 successful delivery of some other message. This seems entirely
4464 reasonable: after all the message is NOT "waiting for some host".
4465 This is so "obvious" that I'm not sure why it wasn't done
4466 previously. Hope I haven't missed anything, but it can't do any
4467 harm, as the worst effect is to miss an optimization.
4469 (ii) If, despite (i), such a delivery is accidentally attempted, the
4470 routing retry time is respected, so at least it doesn't keep
4471 hammering the server.
4473 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4474 in ${readsocket because some servers need this prod.
4476 PH/32 Added some extra debug output when updating a wait-xxx database.
4478 PH/33 The hint "could be header name not terminated by colon", which has been
4479 given for certain expansion errors for a long time, was not being given
4480 for the ${if def:h_colon_omitted{... case.
4482 PH/34 The spec says: "With one important exception, whenever a domain list is
4483 being scanned, $domain contains the subject domain." There was at least
4484 one case where this was not true.
4486 PH/35 The error "getsockname() failed: connection reset by peer" was being
4487 written to the panic log as well as the main log, but it isn't really
4488 panic-worthy as it just means the connection died rather early on. I have
4489 removed the panic log writing for the ECONNRESET error when getsockname()
4492 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4493 runs only) independently of the message's sender address. This meant
4494 that, if the 4xx error was in fact related to the sender, a different
4495 message to the same recipient with a different sender could confuse
4496 things. In particular, this can happen when sending to a greylisting
4497 server, but other circumstances could also provoke similar problems.
4498 I have changed the default so that the retry time for these errors is now
4499 based a combination of the sender and recipient addresses. This change
4500 can be overridden by setting address_retry_include_sender=false in the
4503 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4504 remote server are returned as part of bounce messages. This was not
4505 happening for LMTP over a pipe (the lmtp transport), but now it is the
4506 same for both kinds of LMTP.
4508 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4509 in header lines that were in fact CNAMEs. This is no longer the case.
4511 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4512 and queue runs started by the daemon processed all messages. This has
4513 been fixed so that -R and -S can now usefully be given with -q<time>.
4515 PH/40 Import PCRE release 6.7 (fixes some bugs).
4517 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4519 PH/42 Give an error if -q is specified more than once.
4521 PH/43 Renamed the variables $interface_address and $interface_port as
4522 $received_ip_address and $received_port, to make it clear that these
4523 values apply to message reception, and not to the outgoing interface when
4524 a message is delivered. (The old names remain recognized, of course.)
4526 PH/44 There was no timeout on the connect() call when using a Unix domain
4527 socket in the ${readsocket expansion. There now is.
4529 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4530 be meaningful with "accept".
4532 SC/01 Eximstats V1.43
4533 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4535 SC/02 Eximstats V1.44
4536 Use a glob alias rather than an array ref in the generated
4537 parser. This improves both readability and performance.
4539 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4540 Collect SpamAssassin and rejection statistics.
4541 Don't display local sender or destination tables unless
4542 there is data to show.
4543 Added average volumes into the top table text output.
4545 SC/04 Eximstats V1.46
4546 Collect data on the number of addresses (recipients)
4547 as well as the number of messages.
4549 SC/05 Eximstats V1.47
4550 Added 'Message too big' to the list of mail rejection
4551 reasons (thanks to Marco Gaiarin).
4553 SC/06 Eximstats V1.48
4554 Mainlog lines which have GMT offsets and are too short to
4555 have a flag are now skipped.
4557 SC/07 Eximstats V1.49 (Alain Williams)
4558 Added the -emptyok flag.
4560 SC/08 Eximstats V1.50
4561 Fixes for obtaining the IP address from reject messages.
4563 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4564 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4565 whitespace changes from 4.64-PH/27
4567 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4570 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4571 are found, allow negative numbers in numeric criteria)
4573 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4575 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4576 to match changes made in 4.64-PH/43
4578 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4580 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4581 "domain" is actually an IP address, and force a failure. This locks out
4582 those revolvers/nameservers that support "A-for-A" lookups, in
4583 contravention of the specifications.
4585 PH/48 When a host name was looked up from an IP address, and the subsequent
4586 forward lookup of the name timed out, the host name was left in
4587 $sender_host_name, contrary to the specification.
4589 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4590 restricted to single-key lookups, Exim was not diagnosing an error if
4591 * or *@ was used with a query-style lookup.
4593 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4595 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4596 long ago, but noone interested enough thought of it. Let's just say that
4597 the "1.1" means that there are some new functions that weren't there at
4598 some point in the past.
4600 PH/51 Error processing for expansion failure of helo_data from an smtp
4601 transport during callout processing was broken.
4603 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4604 tested/used via the -bh/-bhc/-bs options.
4606 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4607 bug, fixed in subsequent PCRE releases).
4609 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4610 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4612 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4618 SC/01 Use a glob alias rather than an array ref in eximstats generated
4619 parser. This improves both readability and performance.
4621 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4622 Don't display local sender or destination tables in eximstats unless
4623 there is data to show.
4624 Added average volumes into the eximstats top table text output.
4626 SC/03 Collect data on the number of addresses (recipients) as well
4627 as the number of messages in eximstats.
4629 TF/01 Correct an error in the documentation for the redirect router. Exim
4630 does (usually) call initgroups() when daemonizing.
4632 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4633 with consistent privilege compared to when running as a daemon.
4635 TF/03 Note in the spec that $authenticated_id is not set for local
4636 submissions from trusted users.
4638 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4639 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4641 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4642 by adding some example configuration directives to the default
4643 configuration file. A little bit of work is required to uncomment the
4644 directives and define how usernames and passwords are checked, but
4645 there is now a framework to start from.
4647 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4648 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4649 without this. I don't know how relevant this is to other LDAP libraries.
4651 PH/02 Add the verb name to the "unknown ACL verb" error.
4653 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4655 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4657 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4658 directory not expanded when it should be if an expanded home directory
4659 was set for the address (which is overridden by the transport).
4661 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4664 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4665 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4666 because it is too late at that time, and has no effect.
4668 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4669 security issue with \' (bugzilla #107). I could not use the
4670 PQescapeStringConn() function, because it needs a PGconn value as one of
4673 PH/08 When testing addresses using -bt, indicate those final addresses that
4674 are duplicates that would not cause an additional delivery. At least one
4675 person was confused, thinking that -bt output corresponded to deliveries.
4676 (Suppressing duplicates isn't a good idea as you lose the information
4677 about possibly different redirections that led to the duplicates.)
4679 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4680 systems where poll() doesn't work, in particular OS X.
4682 PH/10 Added more information to debugging output for retry time not reached.
4684 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4685 operations in malware.c.
4687 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4690 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4691 syslog_duplication set false, log lines that would normally be written
4692 both the the main log and to the reject log were not written to syslog at
4695 PH/14 In the default configuration, change the use of "message" in ACL warn
4696 statements to "add_header".
4698 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4699 not followed by a command (e.g. "seen endif").
4701 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4702 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4705 PH/17 Added extra conditions to the default value of delay_warning_condition
4709 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4710 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4711 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4714 The Auto-Submitted: and various List- headers are standardised, whereas I
4715 don't think Precedence: ever was.
4717 PH/18 Refactored debugging code in route_finduser() to show more information,
4718 in particular, the error code if getpwnam() issues one.
4720 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4721 This is apparently needed in addition to the PH/07 change above to avoid
4722 any possible encoding problems.
4724 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4725 but not after initializing Perl.
4727 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4728 output them only if debugging. By default they are written stderr,
4729 apparently, which is not desirable.
4731 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4734 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4737 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4739 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4740 authenticated or an ident call has been made. Suppress the default
4741 values for $authenticated_id and $authenticated_sender (but permit -oMai
4742 and -oMas) when testing with -bh.
4744 PH/24 Re-jigged the order of the tests in the default configuration so that the
4745 tests for valid domains and recipients precede the DNS black list and CSA
4746 tests, on the grounds that those ones are more expensive.
4748 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4749 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4750 This bug exists in every version of Exim that I still have, right back to
4753 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4754 However, an attempt to turn on case-sensitivity in a regex key by
4755 including (?-i) didn't work because the subject string was already
4756 lowercased, and the effects were non-intuitive. It turns out that a
4757 one-line patch can be used to allow (?-i) to work as expected.
4763 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4764 other effects) broke the use of negated acl sub-conditions.
4766 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4769 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4770 "Deny" causes Exim to reject the incoming connection with a 554 error.
4771 Unfortunately, if there is a major crisis, such as a disk failure,
4772 tcp-wrappers gives "deny", whereas what one would like would be some
4773 kind of temporary error. A kludge has been added to help with this.
4774 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4775 554 error is used if errno is still zero or contains ENOENT (which occurs
4776 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4779 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4781 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4782 errors. Otherwise a message that provokes a temporary error (when other
4783 messages do not) can cause a whole host to time out.
4785 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4786 addresses were routed directly to files or pipes from a redirect router.
4787 File deliveries just didn't batch; pipe deliveries might have suffered
4790 PH/06 A failure to get a lock for a hints database would erroneously always say
4791 "Failed to get write lock", even when it was really a read lock.
4793 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4794 of 0600. This has been changed to use the value of the lockfile_mode
4795 option (which defaults to 0600).
4797 PH/08 Applied small patch from the Sieve maintainer.
4799 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4800 folder from quota calculations, a direct delivery into this folder messed
4801 up the contents of the maildirsize file. This was because the regex was
4802 used only to exclude .Trash (or whatever) when the size of the mailbox
4803 was calculated. There was no check that a delivery was happening into an
4804 excluded directory. This bug has been fixed by ignoring all quota
4805 processing for deliveries into excluded directories.
4807 PH/10 Added the maildirfolder_create_regex option to appendfile.
4813 PH/01 The code for finding all the local interface addresses on a FreeBSD
4814 system running IPv6 was broken. This may well have applied to all BSD
4815 systems, as well as to others that have similar system calls. The broken
4816 code found IPv4 interfaces correctly, but gave incorrect values for the
4817 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4818 that it would not match correctly against @[] and not recognize the IPv6
4821 PH/02 The ipliteral router was not recognizing addresses of the form user@
4822 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4824 PH/03 Added disable_ipv6.
4826 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4827 decoded form, because it is most often used to construct To: headers
4828 lines in autoreplies, and the decoded form may well be syntactically
4829 invalid. However, $reply_address has leading white space removed, and all
4830 newlines turned into spaces so that the autoreply transport does not
4833 PH/05 If group was specified without a user on a router, and no group or user
4834 was specified on a transport, the group from the router was ignored.
4836 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4837 for visible compile-time settings that can be used to change these
4838 numbers, for those that want even more. Backwards compatibility with old
4839 spool files has been maintained. However, going back to a previous Exim
4840 release will lost any variables that are in spool files.
4842 PH/07 Two small changes when running in the test harness: increase delay when
4843 passing a TCP/IP connection to a new process, in case the original
4844 process has to generate a bounce, and remove special handling of
4845 127.0.0.2 (sic), which is no longer necessary.
4847 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4848 be the same on different OS.
4850 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4853 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4854 whether --show-vars was specified or not
4856 JJ/02 exipick: Added support for new ACL variable spool format introduced
4859 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4860 syntactically invalid From: or Reply-to: line, and a filter used this to
4861 generate an autoreply, and therefore failed to obtain an address for the
4862 autoreply, Exim could try to deliver to a non-existent relative file
4863 name, causing unrelated and misleading errors. What now happens is that
4864 it logs this as a hard delivery error, but does not attempt to create a
4867 PH/11 The exinext utility has a -C option for testing purposes, but although
4868 the given file was scanned by exinext itself; it wasn't being passed on
4869 when Exim was called.
4871 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4872 an end-of-file indication when reading a command response.
4874 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4875 compiled. In many other places in Exim, IPv6 addresses are always
4876 recognized, so I have changed this. It also means that IPv4 domain
4877 literals of the form [IPV4:n.n.n.n] are now always recognized.
4879 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4880 used if the router is not running as root, for example, when verifying at
4881 ACL time, or when using -bh. The debugging output from this situation was
4882 non-existent - all you got was a failure to exec. I have made two
4885 (a) Failures to set uid/gid, the current directory, or a process leader
4886 in a subprocess such as that created by queryprogram now generate
4887 suitable debugging output when -d is set.
4889 (b) The queryprogram router detects when it is not running as root,
4890 outputs suitable debugging information if -d is set, and then runs
4891 the subprocess without attempting to change uid/gid.
4893 PH/15 Minor change to Makefile for building test_host (undocumented testing
4896 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4897 additional section of a DNS packet that returns MX or SRV records.
4898 Instead, it always explicitly searches for A/AAAA records. This avoids
4899 major problems that occur when a DNS server includes only records of one
4900 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4901 fixed another bug: if SRV records were looked up and the corresponding
4902 address records were *not* found in the additional section, the port
4903 values from the SRV records were lost.
4905 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4906 using the correct key (the original address) when searching the retry
4907 rules in order to find which one to use for generating the retry hint.
4909 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4910 adding the default one. Similarly, if it contains a Reply-To: header, the
4911 errors_reply_to option, if set, is not used.
4913 PH/19 When calculating a retry time, Exim used to measure the "time since
4914 failure" by looking at the "first failed" field in the retry record. Now
4915 it does not use this if it is later than than the arrival time of the
4916 message. Instead it uses the arrival time. This makes for better
4917 behaviour in cases where some deliveries succeed, thus re-setting the
4918 "first failed" field. An example is a quota failure for a huge message
4919 when small messages continue to be delivered. Without this change, the
4920 "time since failure" will always be short, possible causing more frequent
4921 delivery attempts for the huge message than are intended.
4922 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4924 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4925 $1, $2, $3) because the numerical variables can be reset during some
4926 expansion items (e.g. "match"), thereby losing the authentication data.
4928 PH/21 Make -bV show the size of off_t variables so that the test suite can
4929 decide whether to run tests for quotas > 2G.
4931 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4932 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4933 filecount value is greater than 2G or if a quota value is greater than 2G
4934 on a system where the size of off_t is not greater than 4, a panic error
4937 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4938 never match. The debug and -bh output now contains an explicit error
4939 message indicating a malformed IPv4 address or mask.
4941 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4942 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4943 PH/23 above applies.
4945 PH/25 Do not write to syslog when running in the test harness. The only
4946 occasion when this arises is a failure to open the main or panic logs
4947 (for which there is an explicit test).
4949 PH/26 Added the /no_tell option to "control=freeze".
4951 PH/27 If a host name lookup failed very early in a connection, for example, if
4952 the IP address matched host_lookup and the reverse lookup yielded a name
4953 that did not have a forward lookup, an error message of the form "no IP
4954 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4955 could be logged. Now it outputs the IP address instead of "NULL".
4957 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4958 allows the sender and the authenticated sender to be set when
4959 submitting a message from within Exim. Since child_open_exim() is
4960 documented for local_scan(), the new function should be too.
4962 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4963 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4964 results in an empty string is now treated as unset.
4966 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4968 PH/31 Added sender_verify_fail logging option.
4970 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4971 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4972 tidied the source and removed it altogether.
4974 PH/33 When a queue run was abandoned because the load average was too high, a
4975 log line was always written; now it is written only if the queue_run log
4976 selector is set. In addition, the log line for abandonment now contains
4977 information about the queue run such as the pid. This is always present
4978 in "start" and "stop" lines but was omitted from the "abandon" line.
4980 PH/34 Omit spaces between a header name and the colon in the error message that
4981 is given when verify = headers_syntax fails (if there are lots of them,
4982 the message gets confusing).
4984 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4985 names, as there are now some PTR records that contain slashes. This check
4986 is only to protect against broken name servers that fall over on strange
4987 characters, so the fact that it applies to all lookups doesn't matter.
4989 PH/36 Now that the new test suite is complete, we can remove some of the
4990 special code in Exim that was needed for the old test suite. For example,
4991 sorting DNS records because real resolvers return them in an arbitrary
4992 order. The new test suite's fake resolver always returns records in the
4995 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4996 bounces) except when queue_only is set, to avoid logging races between
4997 the different processes.
4999 PH/38 Panic-die if .include specifies a non-absolute path.
5001 PH/39 A tweak to the "H" retry rule from its user.
5003 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
5004 a label. They prevented compilation on older perls.
5006 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
5007 a warning to be raised on newish perls.
5009 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
5010 on queue. Changes to match documented behaviour of showing count of
5011 messages matching specified criteria.
5013 PH/40 Changed the default ident timeout from 30s to 5s.
5015 PH/41 Added support for the use of login_cap features, on those BSD systems
5016 that have them, for controlling the resources used by pipe deliveries.
5018 PH/42 The content-scanning code uses fopen() to create files in which to put
5019 message data. Previously it was not paying any attention to the mode of
5020 the files. Exim runs with umask(0) because the rest of the code creates
5021 files with open(), and sets the required mode explicitly. Thus, these
5022 files were ending up world-writeable. This was not a big issue, because,
5023 being within the spool directory, they were not world-accessible. I have
5024 created a function called modefopen, which takes an additional mode
5025 argument. It sets umask(777), creates the file, chmods it to the required
5026 mode, then resets the umask. All the relevant calls to fopen() in the
5027 content scanning code have been changed to use this function.
5029 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
5030 to 24 hours. This avoids potential overflow problems when processing G
5031 and H retry rules. I suspect nobody ever tinkers with this value.
5033 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
5035 PH/45 When the plaintext authenticator is running as a client, the server's
5036 challenges are checked to ensure they are valid base64 strings. By
5037 default, the authentication attempt is cancelled if an invalid string is
5038 received. Setting client_ignore_invalid_base64 true ignores these errors.
5039 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
5040 they are received. Thus, the responses can be made to depend on the
5041 challenges. If an invalid string is ignored, an empty string is placed in
5044 PH/46 Messages that are created by the autoreply transport now contains a
5045 References: header, in accordance with RFCs 2822 and 3834.
5047 PH/47 Added authenticated_sender_force to the smtp transport.
5049 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
5051 PH/49 Installed latest patch from the Sieve maintainer.
5053 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
5054 was also set, the appendfile transport was unnecessarily scanning a
5055 directory of message files (e.g. for maildir delivery) to find the count
5056 of files (along with the size), even though it did not need this
5057 information. It now does the scan only if it needs to find either the
5058 size of the count of files.
5060 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5062 PH/52 Two bugs concerned with error handling when the smtp transport is
5065 (i) Exim was not creating retry information for temporary errors given
5066 for individual recipients after the DATA command when the smtp transport
5067 was used in LMTP mode. This meant that they could be retried too
5068 frequently, and not timed out correctly.
5070 (ii) Exim was setting the flag that allows error details to be returned
5071 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5072 recipients that were returned after the DATA command.
5074 PH/53 This is related to PH/52, but is more general: for any failing address,
5075 when detailed error information was permitted to be returned to the
5076 sender, but the error was temporary, then after the final timeout, only
5077 "retry timeout exceeded" was returned. Now it returns the full error as
5078 well as "retry timeout exceeded".
5080 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5081 do this, and (what is worse) MTAs that accept it.
5083 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5084 will now be deprecated.
5086 PH/56 New os.c-cygwin from the Cygwin maintainer.
5088 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5089 formats (previously only available in exim formats via -bpr, -bpru,
5090 and -bpra. Now also available in native and exiqgrep formats)
5092 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5093 with very large, slow to parse queues
5095 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5097 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5099 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5100 responses to authentication challenges, though it was showing the
5101 challenges; (ii) I've removed the CR characters from the debug output for
5104 PH/58 Allow for the insertion of a newline as well as a space when a string
5105 is turned into more than one encoded-word during RFC 2047 encoding. The
5106 Sieve code now uses this.
5108 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5109 data_4xx, lost_connection, tls_required.
5111 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5112 message was being sent as an SMTP response.
5114 PH/61 Add -l and -k options to exicyclog.
5116 PH/62 When verifying, if an address was redirected to one new address, so that
5117 verification continued, and the new address failed or deferred after
5118 having set something in $address_data, the value of $address_data was not
5119 passed back to the ACL. This was different to the case when no
5120 redirection occurred. The value is now passed back in both cases.
5122 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5123 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5124 use login_cap.h, so on its own it isn't the distinguishing feature. The
5125 new name refers directly to the setclassresources() function.
5127 PH/65 Added configuration files for NetBSD3.
5129 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5131 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5132 is preferred over IPv4.
5134 PH/68 The bounce_return_message and bounce_return_body options were not being
5135 honoured for bounces generated during the reception of non-SMTP messages.
5136 In particular, this applied to messages rejected by the ACL. This bug has
5137 been fixed. However, if bounce_return_message is true and bounce_return_
5138 body is false, the headers that are returned for a non-SMTP message
5139 include only those that have been read before the error was detected.
5140 (In the case of an ACL rejection, they have all been read.)
5142 PH/69 The HTML version of the specification is now built in a directory called
5143 spec_html instead of spec.html, because the latter looks like a path with
5144 a MIME-type, and this confuses some software.
5146 PH/70 Catch two compiler warnings in sieve.c.
5148 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5149 function verify_get_ident() calls ip_connect() to connect a socket, but
5150 if the "connect()" function timed out, ip_connect() used to close the
5151 socket. However, verify_get_ident() also closes the socket later, and in
5152 between Exim writes to the log, which may get opened at this point. When
5153 the socket was closed in ip_connect(), the log could get the same file
5154 descriptor number as the socket. This naturally causes chaos. The fix is
5155 not to close the socket in ip_connect(); the socket should be closed by
5156 the function that creates it. There was only one place in the code where
5157 this was missing, in the iplookup router, which I don't think anybody now
5158 uses, but I've fixed it anyway.
5160 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5161 well as to direct DNS lookups. Otherwise the handling of names in host
5162 lists is inconsistent and therefore confusing.
5168 PH/01 Two changes to the default runtime configuration:
5170 (1) Move the checks for relay_from_hosts and authenticated clients from
5171 after to before the (commented out) DNS black list checks.
5173 (2) Add control=submission to the relay_from_hosts and authenticated
5174 clients checks, on the grounds that messages accepted by these
5175 statements are most likely to be submissions.
5177 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5179 (1) Generate an error if the third argument for the ${prvs expansion is
5182 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5185 (3) Reset the variables that are obtained from the first argument of
5186 ${prvscheck and used in the second argument before leaving the code,
5187 because their memory is reclaimed, so using them afterwards may do
5190 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5191 one (it's much easier than Tom thought :-).
5193 (5) Because of (4), we can now allow for the use of $prvscheck_result
5194 inside the third argument.
5196 PH/03 For some reason, the default setting of PATH when running a command from
5197 a pipe transport was just "/usr/bin". I have changed it to
5200 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5201 anything to be listed in the output from -bV.
5203 PH/05 When a filter generated an autoreply, the entire To: header line was
5204 quoted in the delivery log line, like this:
5206 => >A.N.Other <ano@some.domain> <original@ddress> ...
5208 This has been changed so that it extracts the operative address. There
5209 may be more than one such address. If so, they are comma-separated, like
5212 => >ano@some.domain,ona@other.domain <original@ddress> ...
5214 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5215 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5216 not being looked up in the rDNS to get a host name, Exim was showing the
5217 IP address twice in Received: lines, even though the IP addresses were
5218 identical. For example:
5220 Received: from [1.2.3.4] (helo=[1.2.3.4])
5222 However, if the real host name was known, it was omitting the HELO data
5223 if it matched the actual IP address. This has been tidied up so that it
5224 doesn't show the same IP address twice.
5226 PH/07 When both +timestamp and +memory debugging was on, the value given by
5227 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5228 called by the debug printing, thereby overwriting the timestamp buffer.
5229 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5231 PH/08 When the original message was included in an autoreply transport, it
5232 always said "this is a copy of the message, including all the headers",
5233 even if body_only or headers_only was set. It now gives an appropriate
5236 PH/09 Applied a patch from the Sieve maintainer which:
5238 o fixes some comments
5239 o adds the (disabled) notify extension core
5240 o adds some debug output for the result of if/elsif tests
5241 o points to the current vacation draft in the documentation
5242 and documents the missing references header update
5246 o fixes a bug in processing the envelope test (when testing
5247 multiple envelope elements, the last element determined the
5250 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5251 Electronic Mail") by including:
5253 Auto-submitted: auto-generated
5255 in the messages that it generates (bounce messages and others, such as
5256 warnings). In the case of bounce messages for non-SMTP messages, there was
5257 also a typo: it was using "Auto_submitted" (underscore instead of
5258 hyphen). Since every message generated by Exim is necessarily in response
5259 to another message, thes have all been changed to:
5261 Auto-Submitted: auto-replied
5263 in accordance with these statements in the RFC:
5265 The auto-replied keyword:
5267 - SHOULD be used on messages sent in direct response to another
5268 message by an automatic process,
5270 - MUST NOT be used on manually-generated messages,
5272 - MAY be used on Delivery Status Notifications (DSNs) and Message
5273 Disposition Notifications (MDNs),
5275 - MUST NOT be used on messages generated by automatic or periodic
5276 processes, except for messages which are automatic responses to
5279 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5280 to the default Received: header definition.
5282 PH/12 Added log selector acl_warn_skipped (default on).
5284 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5285 variables because (a) they are in the wrong storage pool and (b) even if
5286 they were copied, it wouldn't work properly because of the caching.
5288 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5289 checking when decoding. Apparently there are clients that generate
5290 overlong encoded strings. Why am I not surprised?
5292 PH/15 If the first argument of "${if match_address" was not empty, but did not
5293 contain an "@" character, Exim crashed. Now it writes a panic log message
5294 and treats the condition as false.
5296 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5298 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5299 extension "envelope-auth". The code is finished and in agreement with
5300 other implementations, but there is no documentation so far and in fact,
5301 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5302 not changing the active code.
5304 Print executed "if" and "elsif" statements when debugging is used. This
5305 helps a great deal to understand what a filter does.
5307 Document more things not specified clearly in RFC3028. I had all this
5308 sorted out, when out of a sudden new issues came to my mind. Oops."
5310 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5313 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5314 canonical form (as documented). However, after a host name lookup from
5315 the IP address, check_host() was doing a simple string comparison with
5316 addresses acquired from the DNS when checking that the found name did
5317 have the original IP as one of its addresses. Since any found IPv6
5318 addresses are likely to be in abbreviated form, the comparison could
5319 fail. Luckily, there already exists a function for doing the comparison
5320 by converting both addresses to binary, so now that is used instead of
5321 the text comparison.
5323 PH/20 There was another similar case to PH/19, when a complete host name was
5324 given in a host list; looking up its IP address could give an abbreviated
5325 form, whereas the current host's name might or might not be abbreviated.
5326 The same fix has been applied.
5332 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5333 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5336 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5337 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5339 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5341 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5342 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5343 Also, for "Auto-Submitted", treat anything other than "no" as
5344 non-personal, in accordance with RFC 3834. (Previously it treated
5345 anything starting "auto-" as non-personal.)
5347 TF/01 The control=submission/name=... option had a problem with syntax
5348 errors if the name included a slash character. The /name= option
5349 now slurps the rest of the string, so it can include any characters
5350 but it must come last in the list of options (after /sender_retain
5353 PH/05 Some modifications to the interface to the fake nameserver for the new
5361 TK/01 Added the "success_on_redirect" address verification option. See
5362 NewStuff for rationale and an example.
5364 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5366 PH/02 Patch to exigrep to allow it to work on syslog lines.
5368 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5369 fread() to skip over the body file's header line, because in Cygwin the
5370 header line is locked and is inaccessible.
5372 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5373 co-exist for some time) to make it clear that it is the Exim ID that is
5374 referenced, not the Message-ID: header line.
5376 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5377 string_format() function, because snprintf() does not exist on all
5380 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5381 ${stat: expansion item.
5383 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5384 protocol synchronization error", to keep the pedants happy.
5386 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5387 well as for IRIX systems, when gcc is being used. See the host.c source
5390 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5392 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5395 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5396 transport and to the smtp transport in LMTP mode.
5398 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5400 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5401 run a filter in a subprocess. This could lead to confusion in subsequent
5402 lookups in the parent process. There should also be a search_tidyup() at
5403 the end of the subprocess.
5405 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5406 only if the host matched helo_try_verify_hosts, which caused the
5407 verification to occur when the EHLO/HELO command was issued. The ACL just
5408 tested the remembered result. Now, if a previous verification attempt has
5409 not happened, "verify = helo" does it there and then.
5411 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5413 TK/03 Fix log output including CR from clamd.
5415 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5416 exist provoked a memory error which could cause a segfault.
5418 PH/15 Installed PCRE 6.2
5420 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5422 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5423 of the problem. Specifically, suggested +O2 rather than +O1 for the
5426 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5428 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5429 record, the port was not correctly logged when the outgoing_port log
5430 selector was set (it logged the transort's default port).
5432 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5433 fallback_hosts, and "hosts" in the smtp transport.
5435 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5436 host errors such as "Connection refused".
5438 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5439 authentication with radiusclient 0.4.9:
5441 - Error returned from rc_read_config was caught wrongly
5442 - Username/password not passed on to radius server due to wrong length.
5444 The presumption is that some radiusclient API changes for 4.51/PH/17
5445 were not taken care of correctly. The code is still untested by me (my
5446 Linux distribution still has 0.3.2 of radiusclient), but it was
5447 contributed by a Radius user.
5449 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5450 expanding the "port" option of the smtp transport.
5452 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5453 while reading a MIME header. Thanks to Tom Hughes for a patch.
5455 PH/24 Include config.h inside local_scan.h so that configuration settings are
5458 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5459 that in an ACL for RCPT (for example), you can examine exactly what was
5462 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5463 commands, but it was not correctly comparing the address with the actual
5464 client host address. Thus, it would show the EHLO address in Received:
5465 header lines when this was not necessary.
5467 PH/27 Added the % operator to ${eval:}.
5469 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5470 it should be ignoring failures (because with -C, for example, it has lost
5471 privilege). It wasn't ignoring creation failures other than "already
5474 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5477 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5478 because an input line was too long, either on its own, or by virtue of
5479 too many continuations, the temporary file was not being removed, and the
5480 return code was incorrect.
5482 PH/31 Missing "BOOL" in function definition in filtertest.c.
5484 PH/32 Applied Sieve patches from the maintainer.
5486 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5488 PH/33 Added "verify = not_blind".
5490 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5491 Local/Makefile (with some defaults set). These are used in built scripts
5492 such as exicyclog, but they have never been used in the exim_install
5493 script (though there are many overriding facilities there). I have
5494 arranged that the exim_install script now takes note of these two
5497 PH/35 Installed configuration files for Dragonfly.
5499 PH/36 When a locally submitted message by a trusted user did not contain a
5500 From: header, and the sender address was obtained from -f or from an SMTP
5501 MAIL command, and the trusted user did not use -F to supply a sender
5502 name, $originator_name was incorrectly used when constructing a From:
5503 header. Furthermore, $originator_name was used for submission mode
5504 messages from external hosts without From: headers in a similar way,
5505 which is clearly wrong.
5507 PH/37 Added control=suppress_local_fixups.
5509 PH/38 When log_selector = +received_sender was set, and the addition of the
5510 sender made the log line's construction buffer exactly full, or one byte
5511 less than full, an overflow happened when the terminating "\n" was
5514 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5515 when the result of a list match is failure because a DNS lookup failed.
5517 PH/40 RM_COMMAND is now used in the building process.
5519 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5520 the "build-* directories that it finds.
5522 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5523 address in a domain literal was a prefix of an interface address.
5525 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5526 when verifying a sender address, unless rewrite_headers is false.
5528 PH/44 Wrote a long comment about why errors_to addresses are verified as
5529 recipients, not senders.
5531 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5532 the ratelimit ACL was added.
5534 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5536 PH/46 Added extra information about PostgreSQL errors to the error string.
5538 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5539 avoiding the need to install special zones in a real server. This is
5540 backwards compatible; if it can't find the fake resolver, it drops back.
5541 Thus, both old and new test suites can be run.
5543 TF/02 Added util/ratelimit.pl
5545 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5546 clock is set back in time.
5548 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5549 Candler <B.Candler@pobox.com>.
5551 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5552 OK for addresses that are the result of redirections.
5554 PH/48 A number of further additions for the benefit of the new test suite,
5555 including a fake gethostbyname() that interfaces to the fake DNS resolver
5558 TF/06 The fix for widen_domains has also been applied to qualify_single and
5559 search_parents which are the other dnslookup options that can cause
5562 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5565 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5567 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5568 service" if it encountered an MX record with an empty target hostname.
5569 The message is now "an MX or SRV record indicated no SMTP service".
5571 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5572 if the DNS of the sending site is misconfigured. This is quite a
5573 common situation. This change restores the behaviour of treating a
5574 helo verification defer as a failure.
5576 PH/51 If self=fail was set on a router, the bounce message did not include the
5577 actual error message.
5583 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5585 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5586 command itself ended in error, the underlying message about the transport
5587 filter timeout was being overwritten with the pipe command error. Now the
5588 underlying error message should be appended to the second error message.
5590 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5592 PH/02 Reduce the amount of output that "make" produces by default. Full output
5593 can still be requested.
5595 PH/03 The warning log line about a condition test deferring for a "warn" verb
5596 was being output only once per connection, rather than after each
5597 occurrence (because it was using the same function as for successful
5598 "warn" verbs). This seems wrong, so I have changed it.
5600 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5601 it should not have, which might have caused a crash in the right
5602 circumstances, but probably never did.
5604 PH/04 Installed a modified version of Tony Finch's patch to make submission
5605 mode fix the return path as well as the Sender: header line, and to
5606 add a /name= option so that you can make the user's friendly name appear
5609 TF/03 Added the control = fakedefer ACL modifier.
5611 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5612 Mark Lowes for thorough testing.
5614 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5616 TK/03 Merged latest SRS patch from Miles Wilton.
5618 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5619 with the definition in sysexits.h (which is #included earlier).
5620 Fortunately, Exim does not actually use EX_OK. The code used to try to
5621 preserve the sysexits.h value, by assuming that macro definitions were
5622 scanned for macro replacements. I have been disabused of this notion,
5623 so now the code just undefines EX_OK before #including unistd.h.
5625 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5626 in the smtp transport. When a block could not be written in a single
5627 write() function, the timeout was being re-applied to each part-write.
5628 This seems wrong - if the receiver was accepting one byte at a time it
5629 would take for ever. The timeout is now adjusted when this happens. It
5630 doesn't have to be particularly precise.
5632 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5633 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5635 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5636 without a domain if the check to <postmaster@domain> fails.
5638 SC/01 Eximstats: added -xls and the ability to specify output files
5639 (patch written by Frank Heydlauf).
5641 SC/02 Eximstats: use FileHandles for outputting results.
5643 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5645 SC/04 Eximstats: fixed display of large numbers with -nvr option
5647 SC/05 Eximstats: fixed merging of reports with empty tables.
5649 SC/06 Eximstats: added the -include_original_destination flag
5651 SC/07 Eximstats: removed tabs and trailing whitespace.
5653 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5655 TK/06 MBOX spool code: Add real "From " MBOX separator line
5656 so the .eml file is really in mbox format (even though
5657 most programs do not really care). Patch from Alex Miller.
5659 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5660 The latter is generated from $received_to and is only set if the
5661 message has one envelope recipient. SA can use these headers,
5662 obviously out-of-the-box. Patch from Alex Miller.
5664 PH/08 The ${def test on a variable was returning false if the variable's
5665 value was "0", contrary to what the specification has always said!
5666 The result should be true unless the variable is empty.
5668 PH/09 The syntax error of a character other than { following "${if
5669 def:variable_name" (after optional whitespace) was not being diagnosed.
5670 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5671 accidental colon was present, for example, could give incorrect results.
5673 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5674 result is used (not including appendfile, where other changes are about
5677 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5678 This involved changing a lot of size variables from int to off_t. It
5679 should work with maildirs and everything.
5681 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5682 spamd dying while we are connected to it.
5684 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5687 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5688 function for BDB 4.3.
5690 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5692 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5693 the sources for PCRE have been re-arranged and more files are now
5696 PH/15 The code I had for printing potentially long long variables in PH/11
5697 above was not the best (it lost precision). The length of off_t variables
5698 is now inspected at build time, and an appropriate printing format (%ld
5699 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5700 to be "long long int" or "long int". This is needed for the internal
5701 formatting function string_vformat().
5703 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5704 the configuration file to be ":syslog", then the script "guesses" where
5705 the logs files are, rather than using the compiled in default. In our
5706 case the guess is not the same as the compiled default, so the script
5707 suddenly stopped working when I started to use syslog. The patch checks
5708 to see if log_file_path is "". If so, it attempts to read it from exim
5709 with no configuration file to get the compiled in version, before it
5710 falls back to the previous guessing code."
5712 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5713 implementing BATV in an Exim configuration. See NewStuff for the gory
5716 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5717 Makefile that are specific to HP-UX.
5719 PH/18 If the "use_postmaster" option was set for a recipient callout together
5720 with the "random" option, the postmaster address was used as the MAIL
5721 FROM address for the random test, but not for the subsequent recipient
5722 test. It is now used for both.
5724 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5725 patch removes a few documentation additions to RFC 3028, because the
5726 latest draft now contains them. It adds the new en;ascii-case comparator
5727 and a new error check for 8bit text in MIME parts. Comparator and
5728 require names are now matched exactly. I enabled the subaddress
5729 extension, but it is not well tested yet (read: it works for me)."
5731 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5732 rework some of the code of TK/09 above to avoid the hardwired use of
5733 "%lld" and "long long". Replaced the call to snprintf() with a call to
5736 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5737 records point to non-existent hosts", "retry timeout exceeded", and
5738 "retry time not reached for any host after a long failure period".
5740 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5741 experimental DomainKeys support:
5743 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5744 (2) On an error such as an illegally used "control", the wrong name for
5745 the control was given.
5747 These problems did NOT occur unless DomainKeys support was compiled.
5749 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5751 PH/24 Added ${if match_ip condition.
5753 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5754 databases so that it will be absolutely obvious if a crash occurs in the
5755 DB library. This is a regular occurrence (often caused by mis-matched
5758 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5759 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5760 picked up on a user's system that detects such things. There doesn't seem
5761 to be a gcc warning option for this - only an attribute that has to be
5762 put on the function's prototype. It seems that in Fedora Core 4 they have
5763 set this on a number of new functions. No doubt there will be more in due
5766 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5767 specify a transport. However, if an address that was verified by such a
5768 router was the subject of a callout, Exim crashed because it tried to
5769 read the rcpt_include_affixes from the non-existent transport. Now it
5770 just assumes that the setting of that option is false. This bug was
5771 introduced by 4.51/PH/31.
5773 PH/28 Changed -d+all to exclude +memory, because that information is very
5774 rarely of interest, but it makes the output a lot bigger. People tend to
5775 do -d+all out of habit.
5777 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5778 code in os-type was giving problems when libc.so lives in lib64, like on
5781 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5782 aren't the modern standard, and it seems that some systems' include files
5783 don't always have them. Exim was already checking for some of the newer
5784 ones like T_AAAA, and defining it itself. I've added checks for all the
5785 record types that Exim uses.
5787 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5788 not automatically generating a new one, as it is supposed to. This
5789 prevented TLS from working. If the file did exist, but contained invalid
5790 data, a new version was generated, as expected. It was only the case of a
5791 non-existent file that was broken.
5793 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5794 with a change in libdomainkeys > 0.64.
5796 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5797 from DNS. If the selector record carries the flag, it now has
5798 precedence over the domain-wide flag.
5800 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5802 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5803 the use of a port name that isn't defined in /etc/services) occurred, the
5804 message was deferred as in a normal delivery, and thus remained on the
5805 spool, instead of being failed because of the mua_wrapper setting. This
5806 is now fixed, and I tidied up some of the mua_wrapper messages at the
5809 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5810 the messages in a hash of arrays rather than using individual hashes.
5811 This is a bit cleaner and results in dramatic memory savings, albeit
5812 at a slight CPU cost.
5814 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5815 as requested by Marc Sherman.
5817 SC/10 Eximstats: added histograms for user specified patterns as requested
5820 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5822 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5823 fopen() in the content-scanning modules that did not already have it.
5829 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5830 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5832 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5834 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5836 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5837 to test Sieve filters that use "vacation".
5839 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5840 that changes the way the GnuTLS parameters are stored in the cache file.
5841 The new format can be generated externally. For backward compatibility,
5842 if the data in the cache doesn't make sense, Exim assumes it has read an
5843 old-format file, and it generates new data and writes a new file. This
5844 means that you can't go back to an older release without removing the
5847 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5848 work if there are any delivery delays because "one_time" forces the
5849 parent to be marked "delivered", so its unseen clone is never tried
5850 again. For this reason, Exim now forbids the simultaneous setting of
5853 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5854 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5855 entry if you want to know the details. The fix, however, neglected to
5856 consider the case when local delivery batching is involved. The test for
5857 "previously delivered" was not happening when checking to see if an
5858 address could be batched with a previous (undelivered) one; under
5859 certain circumstances this could lead to multiple deliveries to the same
5862 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5863 in its include files, and this causes problems building Exim.
5865 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5866 header_syntax) but Exim was just ignoring anything given after a slash.
5867 In particular, this caused confusion with an attempt to use "verify =
5868 reverse_host_lookup/defer_ok". An error is now given when options are
5869 supplied for verify items that do not have them. (Maybe reverse_host_
5870 lookup should have a defer_ok option, but that's a different point.)
5872 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5873 defined by RFC 821) to 2048, because there were problems with some AUTH
5874 commands, and RFC 1869 says the size should be increased for extended
5875 SMTP commands that take arguments.
5877 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5880 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5881 "unknown" error; now it says that the functionality isn't in the binary.
5883 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5884 an address' error message when a string expansion fails (syntax or
5885 whatever). Otherwise the password may appear in the log. Following change
5886 PH/42 below, there is no longer a chance of it appearing in a bounce
5889 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5891 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5892 of its addresses was ever tried. (Bugzilla bug #2.)
5894 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5895 the result incorrectly in the debug output. (It correctly added a newline
5896 to what was transported.)
5898 TF/01 Added $received_time.
5900 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5901 commented out examples of how to interface to a virus scanner and to
5902 SpamAssassin. Also added commented examples of av_scanner and
5903 spamd_address settings.
5905 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5906 and controls are allowed in which ACLs. There were a couple of minor
5907 errors. Some of the entries in the conditions table (which is a table of
5908 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5909 negation of where the condition IS allowed.
5911 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5913 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5914 header file does not have a version number, so I've had to invent a new
5915 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5916 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5917 radiusclient), but it was contributed by a Radius user.
5919 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5920 files or directories, for OpenSSL.
5922 PH/19 When an Exim process that is running as root has to create an Exim log
5923 file, it does so in a subprocess that runs as exim:exim so as to get the
5924 ownership right at creation (otherwise, other Exim processes might see
5925 the file with the wrong ownership). There was no test for failure of this
5926 fork() call, which would lead to the process getting stuck as it waited
5927 for a non-existent subprocess. Forks do occasionally fail when resources
5928 run out. I reviewed all the other calls to fork(); they all seem to check
5931 PH/20 When checking for unexpected SMTP input at connect time (before writing
5932 the banner), Exim was not dealing correctly with a non-positive return
5933 from the read() function. If the client had disconnected by this time,
5934 the result was a log entry for a synchronization error with an empty
5935 string after "input=" when read() returned zero. If read() returned -1
5936 (an event I could not check), uninitialized data bytes were printed.
5937 There were reports of junk text (parts of files, etc) appearing after
5940 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5942 PH/22 Added support for macro redefinition, and (re)definition in between
5943 driver and ACL definitions.
5945 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5946 forgetting to use the resulting value; it was using the unexpanded value.
5948 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5949 hadn't been configured. The fix is from Juergen Kreileder, who
5950 understands it better than I do:
5952 "Here's what I see happening with three configured cyrus_sasl
5953 authenticators configured (plain, login, cram-md5):
5955 On startup auth_cyrus_sasl_init() gets called for each of these.
5956 This means three calls to sasl_listmech() without a specified mech_list.
5957 => SASL tests which mechs of all available mechs actually work
5958 => three warnings about OTP not working
5959 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5961 With the patch, sasl_listmech() also gets called three times. But now
5962 SASL's mech_list option is set to the server_mech specified in the the
5963 authenticator. Or in other words, the answer from sasl_listmech()
5964 gets limited to just the mech you're testing for (which is different
5966 => the return list contains just 'plain' or 'login', 'cram-md5' or
5967 nothing depending on the value of ob->server_mech.
5969 I've just tested the patch: Authentication still works fine,
5970 unavailable mechs specified in the exim configuration are still
5971 caught, and the auth.log warnings about OTP are gone."
5973 PH/25 When debugging is enabled, the contents of the command line are added
5974 to the debugging output, even when log_selector=+arguments is not
5977 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5978 answer is "GNU", and only if the return is "GNU/something" is the answer
5981 PH/27 $acl_verify_message is now set immediately after the failure of a
5982 verification in an ACL, and so is available in subsequent modifiers. In
5983 particular, the message can be preserved by coding like this:
5985 warn !verify = sender
5986 set acl_m0 = $acl_verify_message
5988 Previously, $acl_verify_message was set only while expanding "message"
5989 and "log_message" when a very denied access.
5991 PH/28 Modified OS/os.c-Linux with
5993 -#ifndef OS_LOAD_AVERAGE
5994 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5996 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5997 nomenclature these days.)
5999 PH/29 Installed patch from the Sieve maintainer that adds the options
6000 sieve_useraddress and sieve_subaddress to the redirect router.
6002 PH/30 In these circumstances:
6003 . Two addresses routed to the same list of hosts;
6004 . First host does not offer TLS;
6005 . First host accepts first address;
6006 . First host gives temporary error to second address;
6007 . Second host offers TLS and a TLS session is established;
6008 . Second host accepts second address.
6009 Exim incorrectly logged both deliveries with the TLS parameters (cipher
6010 and peerdn, if requested) that were in fact used only for the second
6013 PH/31 When doing a callout as part of verifying an address, Exim was not paying
6014 attention to any local part prefix or suffix that was matched by the
6015 router that accepted the address. It now behaves in the same way as it
6016 does for delivery: the affixes are removed from the local part unless
6017 rcpt_include_affixes is set on the transport.
6019 PH/32 Add the sender address, as F=<...>, to the log line when logging a
6020 timeout during the DATA phase of an incoming message.
6022 PH/33 Sieve envelope tests were broken for match types other than :is. I have
6023 applied a patch sanctioned by the Sieve maintainer.
6025 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
6026 the uid or gid is negative. A case of a negative gid caused this to be
6027 noticed. The fix allows for either to be negative.
6029 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
6030 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
6033 PH/36 The change PH/12 above was broken. Fixed it.
6035 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
6036 the grounds that routing the same address twice would always produce the
6037 same answer. This might have been true once, but it is certainly no
6038 longer true now. Routing a child address may depend on the previous
6039 routing that produced that child. Some complicated redirection strategies
6040 went wrong when messages had multiple recipients, and made Exim's
6041 behaviour dependent on the order in which the addresses were given.
6043 I have moved the duplicate checking until after the routing is complete.
6044 Exim scans the addresses that are assigned to local and remote
6045 transports, and removes any duplicates. This means that more work will be
6046 done, as duplicates will always all be routed, but duplicates are
6047 presumably rare, so I don't expect this is of any significance.
6049 For deliveries to pipes, files, and autoreplies, the duplicate checking
6050 still happens during the routing process, since they are not going to be
6053 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
6054 It corrects a timeout issue with spamd. This is Ian's comment: "The
6055 background is that sometimes spamd either never reads data from a
6056 connection it has accepted, or it never writes response data. The exiscan
6057 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
6058 blindly assumes that writes won't block so it may never time out."
6060 PH/39 Allow G after quota size as well as K and M.
6062 PH/40 The value set for $authenticated_id in an authenticator may not contain
6063 binary zeroes or newlines because the value is written to log lines and
6064 to spool files. There was no check on this. Now the value is run through
6065 the string_printing() function so that such characters are converted to
6066 printable escape sequences.
6068 PH/41 $message_linecount is a new variable that contains the total number of
6069 lines in the message. Compare $body_linecount, which is the count for the
6072 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6073 bounce and delay warning messages, except in certain special cases, which
6076 (a) An SMTP error message from a remote host;
6077 (b) A message specified in a :fail: redirection;
6078 (c) A message specified in a "fail" command in a system filter;
6079 (d) A message specified in a FAIL return from the queryprogram router;
6080 (e) A message specified by the cannot_route_message router option.
6082 In these cases only, Exim does include the error details in bounce and
6083 warning messages. There are also a few cases where bland messages such
6084 as "unrouteable address" or "local delivery error" are given.
6086 PH/43 $value is now also set for the "else" part of a ${run expansion.
6088 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6089 being worked on, but at least Exim now implements the latest version to
6092 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6093 process to complete was treated as a delivery failure, a timeout while
6094 writing the message to the pipe was logged, but erroneously treated as a
6095 successful delivery. Such timeouts include transport filter timeouts. For
6096 consistency with the overall process timeout, these timeouts are now
6097 treated as errors, giving rise to delivery failures by default. However,
6098 there is now a new Boolean option for the pipe transport called
6099 timeout_defer, which, if set TRUE, converts the failures into defers for
6100 both kinds of timeout. A transport filter timeout is now identified in
6103 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6104 systems where "make" and "gmake" are different, calling "gmake" at top
6105 level broke things. I've arranged for the value of $(MAKE) to be passed
6106 from the Makefile to this script so that it can call the same version of
6110 A note about Exim versions 4.44 and 4.50
6111 ----------------------------------------
6113 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6114 changes of various kinds. As a consequence, a big documentation update was
6115 needed. This delayed the release for rather longer than seemed good, especially
6116 in the light of a couple of (minor) security issues. Therefore, the changes
6117 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6118 release. So 4.44 and 4.50 are in effect two different branches that both start
6121 I have left the 4.50 change log unchanged; it contains all the changes since
6122 4.43. The change log for 4.44 is below; many of its items are identical to
6123 those for 4.50. This seems to be the most sensible way to preserve the
6124 historical information.
6130 1. Minor wording change to the doc/README.SIEVE file.
6132 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6133 computation of the current number of files was incorrect.
6135 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6136 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6139 4. Give more explanation in the error message when the command for a transport
6140 filter fails to execute.
6142 5. There are several places where Exim runs a non-Exim command in a
6143 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6144 was being done only for the command run by the queryprogram router. It is
6145 now done for all such subprocesses. The other cases are: ${run, transport
6146 filters, and the commands run by the lmtp and pipe transports.
6148 6. Added CONFIGURE_GROUP build-time option.
6150 7. Some older OS have a limit of 256 on the maximum number of file
6151 descriptors. Exim was using setrlimit() to set 1000 as a large value
6152 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6153 systems. I've change it so that if it can't get 1000, it tries for 256.
6155 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6156 was an oversight, and furthermore, ever since the addition of extra
6157 controls (e.g. 4.43/32), the checks on when to allow different forms of
6158 "control" were broken. There should now be diagnostics for all cases when a
6159 control that does not make sense is encountered.
6161 9. Added the /retain_sender option to "control=submission".
6163 10. $recipients is now available in the predata ACL (oversight).
6165 11. Tidy the search cache before the fork to do a delivery from a message
6166 received from the command line. Otherwise the child will trigger a lookup
6167 failure and thereby defer the delivery if it tries to use (for example) a
6168 cached ldap connection that the parent has called unbind on.
6170 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6171 of $address_data from the recipient verification was clobbered by the
6172 sender verification.
6174 13. The value of address_data from a sender verification is now available in
6175 $sender_address_data in subsequent conditions in the ACL statement.
6177 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6179 15. Added a new option "connect=<time>" to callout options, to set a different
6182 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6183 was its contents. (It was OK if the option was not defined at all.)
6185 17. A "Completed" log line is now written for messages that are removed from
6186 the spool by the -Mrm option.
6188 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6189 information about exactly what failed.
6191 19. Added -dd to debug only the daemon process.
6193 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6194 handles timeouts, both on the server side and network timeouts. Renamed the
6195 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6197 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6198 It is now set to "smtps".
6200 22. $host_address is now set to the target address during the checking of
6201 ignore_target_hosts.
6203 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6204 being passed; this would have caused $sender_host_name to have been used if
6205 matching the list had actually called for a host name (not very likely,
6206 since this list is usually IP addresses). A host name is now passed as
6209 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6210 code that specifies a non-restarting handler (typically sigaction() in
6211 modern systems) in an attempt to fix a rare and obscure crash bug.
6213 25. Narrowed the window for a race in the daemon that could cause it to ignore
6214 SIGCHLD signals. This is not a major problem, because they are used only to
6215 wake it up if nothing else does.
6217 26. A malformed maildirsize file could cause Exim to calculate negative values
6218 for the mailbox size or file count. Odd effects could occur as a result.
6219 The maildirsize information is now recalculated if the size or filecount
6222 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6223 support for a long time. Removed HAVE_SYS_VFS_H.
6225 28. Installed the latest version of exipick from John Jetmore.
6227 29. In an address list, if the pattern was not a regular expression, an empty
6228 subject address (from a bounce message) matched only if the pattern was an
6229 empty string. Non-empty patterns were not even tested. This was the wrong
6230 because it is perfectly reasonable to use an empty address as part of a
6231 database query. An empty address is now tested by patterns that are
6232 lookups. However, all the other forms of pattern expect the subject to
6233 contain a local part and a domain, and therefore, for them, an empty
6234 address still always fails if the pattern is not itself empty.
6236 30. Exim went into a mad DNS loop when attempting to do a callout where the
6237 host was specified on an smtp transport, and looking it up yielded more
6238 than one IP address.
6240 31. Re-factored the code for checking spool and log partition space into a
6241 function that finds that data and another that does the check. The former
6242 is then used to implement four new variables: $spool_space, $log_space,
6243 $spool_inodes, and $log_inodes.
6245 32. The RFC2047 encoding function was originally intended for short strings
6246 such as real names; it was not keeping to the 75-character limit for
6247 encoded words that the RFC imposes. It now respects the limit, and
6248 generates multiple encoded words if necessary. To be on the safe side, I
6249 have increased the buffer size for the ${rfc2047: expansion operator from
6252 33. It is now permitted to omit both strings after an "if" condition; if the
6253 condition is true, the result is "true". As before, when the second string
6254 is omitted, a false condition yields an empty string. This makes it less
6255 cumbersome to write custom ACL and router conditions.
6257 34. Failure to deliver a bounce message always caused it to be frozen, even if
6258 there was an errors_to setting on the router. The errors_to setting is now
6261 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6262 canonical form (fully expanded) before being placed in
6263 $sender_host_address.
6265 36. The table in the code that translates DNS record types into text (T_A to
6266 "A" for instance) was missing entries for NS and CNAME. It is just possible
6267 that this could have caused confusion if both these types were looked up
6268 for the same domain, because the text type is used as part of Exim's
6269 per-process caching. But the chance of anyone hitting this buglet seems
6272 37. The dnsdb lookup has been extended in a number of ways.
6274 (1) There is a new type, "zns", which walks up the domain tree until it
6275 finds some nameserver records. It should be used with care.
6277 (2) There is a new type, "mxh", which is like "mx" except that it returns
6278 just the host names, not the priorities.
6280 (3) It is now possible to give a list of domains (or IP addresses) to be
6281 looked up. The behaviour when one of the lookups defers can be
6282 controlled by a keyword.
6284 (4) It is now possible to specify the separator character for use when
6285 multiple records are returned.
6287 38. The dnslists ACL condition has been extended: it is now possible to supply
6288 a list of IP addresses and/or domains to be looked up in a particular DNS
6291 39. Added log_selector=+queue_time_overall.
6293 40. When running the queue in the test harness, wait just a tad after forking a
6294 delivery process, to get repeatability of debugging output.
6296 41. Include certificate and key file names in error message when GnuTLS fails
6297 to set them up, because the GnuTLS error message doesn't include the name
6298 of the failing file when there is a problem reading it.
6300 42. Allow both -bf and -bF in the same test run.
6302 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6304 44. The "Exiscan patch" is now merged into the mainline Exim source.
6306 45. Sometimes the final signoff response after QUIT could fail to get
6307 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6308 < 0 before doing a fflush(). This bug looks as though it goes back to the
6309 introduction of TLS in release 3.20, but "sometimes" must have been rare
6310 because the tests only now provoked it.
6312 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6313 (this can affect the format of dates).
6315 47. exim_tidydb, when checking for the continued existence of a message for
6316 which it has found a message-specific retry record, was not finding
6317 messages that were in split spool directories. Consequently, it was
6318 deleting retry records that should have stayed in existence.
6320 48. Steve fixed some bugs in eximstats.
6322 49. The SPA authentication driver was not abandoning authentication and moving
6323 on to the next authenticator when an expansion was forced to fail,
6324 contradicting the general specification for all authenticators. Instead it
6325 was generating a temporary error. It now behaves as specified.
6327 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6328 (the order specifies the preference for clients). The order is now AES256,
6329 AES128, 3DES, ARCFOUR128.
6331 51. Small patch to Sieve code - explicitly set From: when generating an
6334 52. Exim crashed if a remote delivery caused a very long error message to be
6335 recorded - for instance if somebody sent an entire SpamAssassin report back
6336 as a large number of 550 error lines. This bug was coincidentally fixed by
6337 increasing the size of one of Exim's internal buffers (big_buffer) that
6338 happened as part of the Exiscan merge. However, to be on the safe side, I
6339 have made the code more robust (and fixed the comments that describe what
6342 53. Now that there can be additional text after "Completed" in log lines (if
6343 the queue_time_overall log selector is set), a one-byte patch to exigrep
6344 was needed to allow it to recognize "Completed" as not the last thing in
6347 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6348 patch that reportedly fixes this has been added. I am not expert enough to
6349 create a test for it. This is what the patch creator wrote:
6351 "I found a little strange behaviour of ldap code when working with
6352 Windows 2003 AD Domain, where users was placed in more than one
6353 Organization Units. When I tried to give exim partial DN, the exit code
6354 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6355 But simultaneously result of request was absolutely normal ldap result,
6356 so I produce this patch..."
6358 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6359 REFERENCE, so I have modified the code to exclude the patch when that macro
6362 55. Some experimental protocols are using DNS PTR records for new purposes. The
6363 keys for these records are domain names, not reversed IP addresses. The
6364 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6365 leaves it alone. Component reversal etc. now happens only for IP addresses.
6368 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6370 57. Double the size of the debug message buffer (to 2048) so that more of very
6371 long debug lines gets shown.
6373 58. The exicyclog utility now does better if the number of log files to keep
6374 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6376 59. Two changes related to the smtp_active_hostname option:
6378 (1) $smtp_active_hostname is now available as a variable.
6379 (2) The default for smtp_banner uses $smtp_active_hostname instead
6380 of $primary_hostname.
6382 60. The host_aton() function is supposed to be passed a string that is known
6383 to be a valid IP address. However, in the case of IPv6 addresses, it was
6384 not checking this. This is a hostage to fortune. Exim now panics and dies
6385 if the condition is not met. A case was found where this could be provoked
6386 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6387 components; fortuitously, this particular loophole had already been fixed
6388 by change 4.50/55 above.
6390 If there are any other similar loopholes, the new check in host_aton()
6391 itself should stop them being exploited. The report I received stated that
6392 data on the command line could provoke the exploit when Exim was running as
6393 exim, but did not say which command line option was involved. All I could
6394 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6395 running as the user.
6398 61. There was a buffer overflow vulnerability in the SPA authentication code
6399 (which came originally from the Samba project). I have added a test to the
6400 spa_base64_to_bits() function which I hope fixes it.
6403 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6404 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6406 63. The daemon start-up calls getloadavg() while still root for those OS that
6407 need the first call to be done as root, but it missed one case: when
6408 deliver_queue_load_max is set with deliver_drop_privilege. This is
6409 necessary for the benefit of the queue runner, because there is no re-exec
6410 when deliver_drop_privilege is set.
6412 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6413 This has been fixed.
6415 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6416 was in use, was not putting the data itself into the right store pool;
6417 consequently, it could be overwritten for a subsequent message in the same
6418 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6421 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6423 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6424 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6425 the function were treating the return as a boolean value, which happened to
6426 work because 0=false and not-0=true, but is not correct code.
6428 68. The host_aton() function was not handling scoped IPv6 addresses (those
6429 with, for example, "%eth0" on the end) correctly.
6431 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6432 negated items (that is, ~something) in unsigned ints. Some compilers
6433 apparently mutter when there is no cast.
6435 70. If an address verification called from an ACL failed, and did not produce a
6436 user-specific message (i.e. there was only a "system" message), nothing was
6437 put in $acl_verify_message. In this situation, it now puts the system
6440 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6441 session; change 4.31/43 added the unwanted input to the log line - except
6442 that it did not do this in the start of session case. It now does.
6444 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6445 This is wrong and can cause the other end to generate a synchronization
6446 error if it is another Exim or anything else that does the synchronization
6447 check. A QUIT command is no longer sent after a timeout.
6449 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6450 during host lookups.
6452 74. The defer_ok option of callout verification was not working if it was used
6453 when verifying addresses in header lines, that is, for this case:
6455 verify = header_sender/callout=defer_ok
6457 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6458 those file descriptors could be used for SMTP connections. If anything
6459 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6460 could be sent to the SMTP client, causing chaos. The daemon now opens
6461 stdin, stdout, and stderr to /dev/null when it puts itself into the
6464 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6465 log by default. The user can override this with suitable Perl magic.
6467 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6468 the log message when discard triggers, was not working for the DATA ACL or
6469 for the non-SMTP ACL.
6471 78. Error message wording change in sieve.c.
6473 79. If smtp_accept_max_per_host was set, the number of connections could be
6474 restricted to fewer than expected, because the daemon was trying to set up
6475 a new connection before checking whether the processes handling previous
6476 connections had finished. The check for completed processes is now done
6477 earlier. On busy systems, this bug wouldn't be noticed because something
6478 else would have woken the daemon, and it would have reaped the completed
6481 80. If a message was submitted locally by a user whose login name contained one
6482 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6483 It caused a spool format error. I have fixed the spool reading code. A
6484 related problem was that the "from" clause in the Received: line became
6485 illegal because of the space(s). It is now covered by ${quote_local_part.
6487 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6490 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6492 83. Patch from Sieve maintainer to fix unterminated string problem in
6493 "vacation" handling.
6495 84. Some minor changes to the Linux configuration files to help with other
6496 OS variants using glibc.
6498 85. One more patch for Sieve to update vacation handling to latest spec.
6501 ----------------------------------------------------
6502 See the note above about the 4.44 and 4.50 releases.
6503 ----------------------------------------------------
6509 1. Change 4.43/35 introduced a bug that caused file counts to be
6510 incorrectly computed when quota_filecount was set in an appendfile
6513 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6514 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6517 3. Give more explanation in the error message when the command for a transport
6518 filter fails to execute.
6520 4. There are several places where Exim runs a non-Exim command in a
6521 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6522 was being done only for the command run by the queryprogram router. It is
6523 now done for all such subprocesses. The other cases are: ${run, transport
6524 filters, and the commands run by the lmtp and pipe transports.
6526 5. Some older OS have a limit of 256 on the maximum number of file
6527 descriptors. Exim was using setrlimit() to set 1000 as a large value
6528 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6529 systems. I've change it so that if it can't get 1000, it tries for 256.
6531 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6532 was an oversight, and furthermore, ever since the addition of extra
6533 controls (e.g. 4.43/32), the checks on when to allow different forms of
6534 "control" were broken. There should now be diagnostics for all cases when a
6535 control that does not make sense is encountered.
6537 7. $recipients is now available in the predata ACL (oversight).
6539 8. Tidy the search cache before the fork to do a delivery from a message
6540 received from the command line. Otherwise the child will trigger a lookup
6541 failure and thereby defer the delivery if it tries to use (for example) a
6542 cached ldap connection that the parent has called unbind on.
6544 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6545 of $address_data from the recipient verification was clobbered by the
6546 sender verification.
6548 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6549 was its contents. (It was OK if the option was not defined at all.)
6551 11. A "Completed" log line is now written for messages that are removed from
6552 the spool by the -Mrm option.
6554 12. $host_address is now set to the target address during the checking of
6555 ignore_target_hosts.
6557 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6558 being passed; this would have caused $sender_host_name to have been used if
6559 matching the list had actually called for a host name (not very likely,
6560 since this list is usually IP addresses). A host name is now passed as
6563 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6564 code that specifies a non-restarting handler (typically sigaction() in
6565 modern systems) in an attempt to fix a rare and obscure crash bug.
6567 15. Narrowed the window for a race in the daemon that could cause it to ignore
6568 SIGCHLD signals. This is not a major problem, because they are used only to
6569 wake it up if nothing else does.
6571 16. A malformed maildirsize file could cause Exim to calculate negative values
6572 for the mailbox size or file count. Odd effects could occur as a result.
6573 The maildirsize information is now recalculated if the size or filecount
6576 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6577 support for a long time. Removed HAVE_SYS_VFS_H.
6579 18. Updated exipick to current release from John Jetmore.
6581 19. Allow an empty sender to be matched against a lookup in an address list.
6582 Previously the only cases considered were a regular expression, or an
6585 20. Exim went into a mad DNS lookup loop when doing a callout where the
6586 host was specified on the transport, if the DNS lookup yielded more than
6589 21. The RFC2047 encoding function was originally intended for short strings
6590 such as real names; it was not keeping to the 75-character limit for
6591 encoded words that the RFC imposes. It now respects the limit, and
6592 generates multiple encoded words if necessary. To be on the safe side, I
6593 have increased the buffer size for the ${rfc2047: expansion operator from
6596 22. Failure to deliver a bounce message always caused it to be frozen, even if
6597 there was an errors_to setting on the router. The errors_to setting is now
6600 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6601 canonical form (fully expanded) before being placed in
6602 $sender_host_address.
6604 24. Updated eximstats to version 1.33
6606 25. Include certificate and key file names in error message when GnuTLS fails
6607 to set them up, because the GnuTLS error message doesn't include the name
6608 of the failing file when there is a problem reading it.
6610 26. Expand error message when OpenSSL has problems setting up cert/key files.
6613 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6614 (this can affect the format of dates).
6616 28. exim_tidydb, when checking for the continued existence of a message for
6617 which it has found a message-specific retry record, was not finding
6618 messages that were in split spool directories. Consequently, it was
6619 deleting retry records that should have stayed in existence.
6621 29. eximstats updated to version 1.35
6622 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6623 1.35 - bugfix such that pie charts by volume are generated correctly
6625 30. The SPA authentication driver was not abandoning authentication and moving
6626 on to the next authenticator when an expansion was forced to fail,
6627 contradicting the general specification for all authenticators. Instead it
6628 was generating a temporary error. It now behaves as specified.
6630 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6631 (the order specifies the preference for clients). The order is now AES256,
6632 AES128, 3DES, ARCFOUR128.
6634 31. Small patch to Sieve code - explicitly set From: when generating an
6637 32. Exim crashed if a remote delivery caused a very long error message to be
6638 recorded - for instance if somebody sent an entire SpamAssassin report back
6639 as a large number of 550 error lines. This bug was coincidentally fixed by
6640 increasing the size of one of Exim's internal buffers (big_buffer) that
6641 happened as part of the Exiscan merge. However, to be on the safe side, I
6642 have made the code more robust (and fixed the comments that describe what
6645 33. Some experimental protocols are using DNS PTR records for new purposes. The
6646 keys for these records are domain names, not reversed IP addresses. The
6647 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6648 leaves it alone. Component reversal etc. now happens only for IP addresses.
6651 34. The host_aton() function is supposed to be passed a string that is known
6652 to be a valid IP address. However, in the case of IPv6 addresses, it was
6653 not checking this. This is a hostage to fortune. Exim now panics and dies
6654 if the condition is not met. A case was found where this could be provoked
6655 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6656 components; fortuitously, this particular loophole had already been fixed
6657 by change 4.50/55 or 4.44/33 above.
6659 If there are any other similar loopholes, the new check in host_aton()
6660 itself should stop them being exploited. The report I received stated that
6661 data on the command line could provoke the exploit when Exim was running as
6662 exim, but did not say which command line option was involved. All I could
6663 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6664 running as the user.
6667 35. There was a buffer overflow vulnerability in the SPA authentication code
6668 (which came originally from the Samba project). I have added a test to the
6669 spa_base64_to_bits() function which I hope fixes it.
6672 36. The daemon start-up calls getloadavg() while still root for those OS that
6673 need the first call to be done as root, but it missed one case: when
6674 deliver_queue_load_max is set with deliver_drop_privilege. This is
6675 necessary for the benefit of the queue runner, because there is no re-exec
6676 when deliver_drop_privilege is set.
6678 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6679 was in use, was not putting the data itself into the right store pool;
6680 consequently, it could be overwritten for a subsequent message in the same
6681 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6684 38. Sometimes the final signoff response after QUIT could fail to get
6685 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6686 < 0 before doing a fflush(). This bug looks as though it goes back to the
6687 introduction of TLS in release 3.20, but "sometimes" must have been rare
6688 because the tests only now provoked it.
6694 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6695 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6696 Now it returns an integer. A number of calls were still expecting a T/F
6697 return. Fortuitously, in all cases, the tests worked in OK situations,
6698 which is the norm. However, things would have gone wrong on any write
6699 failures on the smtp file descriptor. This function is used when sending
6700 messages over SMTP and also when doing verify callouts.
6702 2. When Exim is called to do synchronous delivery of a locally submitted
6703 message (the -odf or -odi options), it no longer closes stderr before doing
6706 3. Implemented the mua_wrapper option.
6708 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6710 5. Implemented the functions header_remove(), header_testname(),
6711 header_add_at_position(), and receive_remove_recipient(), and exported them
6714 6. If an ACL "warn" statement specified the addition of headers, Exim already
6715 inserted X-ACL-Warn: at the start if there was no header name. However, it
6716 was not making this test for the second and subsequent header lines if
6717 there were newlines in the string. This meant that an invalid header could
6718 be inserted if Exim was badly configured.
6720 7. Allow an ACL "warn" statement to add header lines at the start or after all
6721 the Received: headers, as well as at the end.
6723 8. Added the rcpt_4xx retry error code.
6725 9. Added postmaster_mailfrom=xxx to callout verification option.
6727 10. Added mailfrom=xxxx to the callout verification option, for verify=
6730 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6731 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6733 12. Inserted some casts to stop certain compilers warning when using pointer
6734 differences as field lengths or precisions in printf-type calls (mostly
6735 affecting debugging statements).
6737 13. Added optional readline() support for -be (dynamically loaded).
6739 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6740 same clock tick as a message's arrival, so that its received time was the
6741 same as the "first fail" time on the retry record, and that message
6742 remained on the queue past the ultimate address timeout, every queue runner
6743 would try a delivery (because it was past the ultimate address timeout) but
6744 after another failure, the ultimate address timeout, which should have then
6745 bounced the address, did not kick in. This was a "< instead of <=" error;
6746 in most cases the first failure would have been in the next clock tick
6747 after the received time, and all would be well.
6749 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6750 being recognized when the domain list was tested by the match_domain
6751 condition in an expansion string.
6753 16. Added the ${str2b64: operator.
6755 17. Exim was always calling setrlimit() to set a large limit for the number of
6756 processes, without checking whether the existing limit was already
6757 adequate. (It did check for the limit on file descriptors.) Furthermore,
6758 errors from getrlimit() and setrlimit() were being ignored. Now they are
6759 logged to the main and panic logs, but Exim does carry on, to try to do its
6760 job under whatever limits there are.
6762 18. Imported PCRE 5.0.
6764 19. Trivial typo in log message " temporarily refused connection" (the leading
6767 20. If the log selector return_path_on_delivery was set and an address was
6768 redirected to /dev/null, the delivery process crashed because it assumed
6769 that a return path would always be set for a "successful" delivery. In this
6770 case, the whole delivery is bypassed as an optimization, and therefore no
6773 21. Internal re-arrangement: the function for sending a challenge and reading
6774 a response while authentication was assuming a zero-terminated challenge
6775 string. It's now changed to take a pointer and a length, to allow for
6776 binary data in such strings.
6778 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6780 23. Exim was not respecting finduser_retries when seeking the login of the
6781 uid under which it was called; it was always trying 10 times. (The default
6782 setting of finduser_retries is zero.) Also, it was sleeping after the final
6783 failure, which is pointless.
6785 24. Implemented tls_on_connect_ports.
6787 25. Implemented acl_smtp_predata.
6789 26. If the domain in control=submission is set empty, Exim assumes that the
6790 authenticated id is a complete email address when it generates From: or
6791 Sender: header lines.
6793 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6794 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6795 chown and chgrp in /bin and hostname in /usr/bin.
6797 28. Exim was keeping the "process log" file open after each use, just as it
6798 does for the main log. This opens the possibility of it remaining open for
6799 long periods when the USR1 signal hits a daemon. Occasional processlog
6800 errors were reported, that could have been caused by this. Anyway, it seems
6801 much more sensible not to leave this file open at all, so that is what now
6804 29. The long-running daemon process does not normally write to the log once it
6805 has entered its main loop, and it closes the log before doing so. This is
6806 so that log files can straightforwardly be renamed and moved. However,
6807 there are a couple of unusual error situations where the daemon does write
6808 log entries, and I had neglected to close the log afterwards.
6810 30. The text of an SMTP error response that was received during a remote
6811 delivery was being truncated at 512 bytes. This is too short for some of
6812 the long messages that one sometimes sees. I've increased the limit to
6815 31. It is now possible to make retry rules that apply only when a message has a
6816 specific sender, in particular, an empty sender.
6818 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6819 it possible to be selective about when SMTP synchronization is enforced.
6821 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6823 32. Implemented hosts_connection_nolog.
6825 33. Added an ACL for QUIT.
6827 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6830 35. Added mailbox_size and mailbox_filecount to appendfile.
6832 36. Added control = no_multiline_responses to ACLs.
6834 37. There was a bug in the logic of the code that waits for the clock to tick
6835 in the case where the clock went backwards by a substantial amount such
6836 that the microsecond fraction of "now" was more than the microsecond
6837 fraction of "then" (but the whole seconds number was less).
6839 38. Added support for the libradius Radius client library this is found on
6840 FreeBSD (previously only the radiusclient library was supported).
6846 1. When certain lookups returned multiple values in the form name=value, the
6847 quoting of the values was not always being done properly. Specifically:
6848 (a) If the value started with a double quote, but contained no whitespace,
6850 (b) If the value contained whitespace other than a space character (i.e.
6851 tabs or newlines or carriage returns) it was not quoted.
6852 This fix has been applied to the mysql and pgsql lookups by writing a
6853 separate quoting function and calling it from the lookup code. The fix
6854 should probably also be applied to nisplus, ibase and oracle lookups, but
6855 since I cannot test any of those, I have not disturbed their existing code.
6857 2. A hit in the callout cache for a specific address caused a log line with no
6858 reason for rejecting RCPT. Now it says "Previous (cached) callout
6859 verification failure".
6861 3. There was an off-by-one bug in the queryprogram router. An over-long
6862 return line was truncated at 256 instead of 255 characters, thereby
6863 overflowing its buffer with the terminating zero. As well as fixing this, I
6864 have increased the buffer size to 1024 (and made a note to document this).
6866 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6867 when Exim is waiting for an SMTP response from a remote server, Exim
6868 restarts its select() call on the socket, thereby resetting its timeout.
6869 This is not a problem when such interrupts are rare. Somebody set up a cron
6870 job to run exiwhat every 2 minutes, which is less than the normal select()
6871 timeout (5 or 10 minutes). This meant that the select() timeout never
6872 kicked in because it was always reset. I have fixed this by comparing the
6873 time when an interrupt arrives with the time at the start of the first call
6874 to select(). If more time than the timeout has elapsed, the interrupt is
6875 treated as a timeout.
6877 5. Some internal re-factoring in preparation for the addition of Sieve
6878 extensions (by MH). In particular, the "personal" test is moved to a
6879 separate function, and given an option for scanning Cc: and Bcc: (which is
6880 not set for Exim filters).
6882 6. When Exim created an email address using the login of the caller as the
6883 local part (e.g. when creating a From: or Sender: header line), it was not
6884 quoting the local part when it contained special characters such as @.
6886 7. Installed new OpenBSD configuration files.
6888 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6889 try to make them clearer.
6891 9. Callout options, other than the timeout value, were being ignored when
6892 verifying sender addresses in header lines. For example, when using
6894 verify = header_sender/callout=no_cache
6896 the cache was (incorrectly) being used.
6898 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6899 only the Cygwin environment.
6901 11. When return_path_on_delivery was set as a log selector, if different remote
6902 addresses in the same message used different return paths and parallel
6903 remote delivery occurred, the wrong values would sometimes be logged.
6904 (Whenever a remote delivery process finished, the return path value from
6905 the most recently started remote delivery process was logged.)
6907 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6908 lines when AUTH and/or TLS are in use. This is the "received protocol"
6909 field. Exim used to use "asmtp" for authenticated SMTP, without any
6910 indication (in the protocol name) for TLS use. Now it follows the RFC and
6911 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6912 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6913 names appear in log lines as well as in Received: header lines.
6915 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6916 extensions, and comparison tests, and to fix some bugs.
6918 14. Changes to the "personal" filter test:
6920 (1) The test was buggy in that it was just doing the equivalent of
6921 "contains" tests on header lines. For example, if a user's address was
6922 anne@some.where, the "personal" test would incorrectly be true for
6924 To: susanne@some.where
6926 This test is now done by extracting each address from the header in turn,
6927 and checking the entire address. Other tests that are part of "personal"
6928 are now done using regular expressions (for example, to check local parts
6929 of addresses in From: header lines).
6931 (2) The list of non-personal local parts in From: addresses has been
6932 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6933 taken from the Sieve specification recommendations.
6935 (3) If the message contains any header line starting with "List-" it is
6936 treated as non-personal.
6938 (4) The test for "circular" in the Subject: header line has been removed
6939 because it now seems ill-conceived.
6941 15. Minor typos in src/EDITME comments corrected.
6943 16. Installed latest exipick from John Jetmore.
6945 17. If headers_add on a router specified a text string that was too long for
6946 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6947 of string_sprintf() is now avoided.
6949 18. $message_body_size was not set (it was always zero) when running the DATA
6950 ACL and the local_scan() function.
6952 19. For the "mail" command in an Exim filter, no default was being set for
6953 the once_repeat time, causing a random time value to be used if "once" was
6954 specified. (If the value happened to be <= 0, no repeat happened.) The
6955 default is now 0s, meaning "never repeat". The "vacation" command was OK
6956 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6957 (I found it when inspecting the code).
6959 20. There is now an overall timeout for performing a callout verification. It
6960 defaults to 4 times the callout timeout, which applies to individual SMTP
6961 commands during the callout. The overall timeout applies when there is more
6962 than one host that can be tried. The timeout is checked before trying the
6963 next host. This prevents very long delays if there are a large number of
6964 hosts and all are timing out (e.g. when the network connections are timing
6965 out). The value of the overall timeout can be changed by specifying an
6966 additional sub-option for "callout", called "maxwait". For example:
6968 verify = sender/callout=5s,maxwait=20s
6970 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6971 to the end before writing, but this should make it even safer).
6973 22. Exim was forgetting that it had advertised PIPELINING for the second and
6974 subsequent messages on an SMTP connection. It was also not resetting its
6975 memory on STARTTLS and an internal HELO.
6977 23. When Exim logs an SMTP synchronization error within a session, it now
6978 records whether PIPELINING has been advertised or not.
6980 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6981 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6982 rather than long int.
6984 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6986 26. Added the never_mail option to autoreply.
6992 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6993 crash if the getsockname() call failed; this can happen if a connection is
6994 closed very soon after it is established. The problem was simply in the
6995 order in which certain operations were done, causing Exim to try to write
6996 to the SMTP stream before it had set up the file descriptor. The bug has
6997 been fixed by making things happen in the correct order.
7003 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
7004 before the connection was closed, thus losing the rejection response.
7006 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
7007 some early Solaris releases, but causes trouble in current releases where
7008 socklen_t is defined.
7010 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
7013 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
7016 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
7017 that releasing the top of it at the end releases what was used for sub-
7018 expansions (unless the block got too big). However, discard this block if
7019 the first thing is a variable or header, so that we can use its block when
7020 it is dynamic (useful for very large $message_headers, for example).
7022 6. Lookups now cache *every* query, not just the most recent. A new, separate
7023 store pool is used for this. It can be recovered when all lookup caches are
7024 flushed. Lookups now release memory at the end of their result strings.
7025 This has involved some general refactoring of the lookup sources.
7027 7. Some code has been added to the store_xxx() functions to reduce the amount
7028 of flapping under certain conditions.
7030 8. log_incoming_interface used to affect only the <= reception log lines. Now
7031 it causes the local interface and port to be added to several more SMTP log
7032 lines, for example "SMTP connection from", and rejection lines.
7034 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
7036 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
7038 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
7039 could be overwritten at the end of the current message (or the start of a
7040 new message if it was set in a HELO ACL). The value is now preserved for
7041 the duration of the SMTP connection.
7043 12. If a transport had a headers_rewrite setting, and a matching header line
7044 contained an unqualified address, that address was qualified, even if it
7045 did not match any rewriting rules. The underlying bug was that the values
7046 of the flags that permit the existence of unqualified sender and recipient
7047 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
7048 non-local messages, and by -bnq for local messages) were not being
7049 preserved with the message after it was received.
7051 13. When Exim was logging an SMTP synchronization error, it could sometimes log
7052 "next input=" as part of the text comprising the host identity instead of
7053 the correct text. The code was using the same buffer for two different
7054 strings. However, depending on which order the printing function evaluated
7055 its arguments, the bug did not always show up. Under Linux, for example, my
7056 test suite worked just fine.
7058 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
7059 doesn't work with some older versions of Perl. It has been changed to "my",
7060 which in any case is probably the better facility to use.
7062 15. A really picky compiler found some instances of statements for creating
7063 error messages that either had too many or two few arguments for the format
7066 16. The size of the buffer for calls to the DNS resolver has been increased
7067 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7068 for addresses that have a lot of PTR records. This alleviates a problem; it
7069 does not fully solve it.
7071 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7072 buffer now truncates the list and logs the incident, which is the same
7073 action as happens when Exim is looking up a host name and its aliases.
7074 Previously in this situation something unpredictable would happen;
7075 sometimes it was "internal error: store_reset failed".
7077 18. If a server dropped the connection unexpectedly when an Exim client was
7078 using GnuTLS and trying to read a response, the client delivery process
7079 crashed while trying to generate an error log message.
7081 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7082 string, for example:
7084 warn message = H1: something\nH2: something
7086 the text was added as a single header line from Exim's point of view
7087 though it ended up OK in the delivered message. However, searching for the
7088 second and subsequent header lines using $h_h2: did not work. This has been
7089 fixed. Similarly, if a system filter added multiple headers in this way,
7090 the routers could not see them.
7092 20. Expanded the error message when iplsearch is called with an invalid key to
7093 suggest using net-iplsearch in a host list.
7095 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7096 ACLs are no longer actually imposed (and a message to that effect is
7099 22. If a "gecos" field in a passwd entry contained escaped characters, in
7100 particular, if it contained a \" sequence, Exim got it wrong when building
7101 a From: or a Sender: header from that name. A second bug also caused
7102 incorrect handling when an unquoted " was present following a character
7103 that needed quoting.
7105 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7106 was not being matched caselessly.
7108 24. Arranged for all hyphens in the exim.8 source to be escaped with
7111 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7112 properly. Recipient callout cache records were still being keyed to include
7113 the sender, even when use_sender was set false. This led to far more
7114 callouts that were necessary. The sender is no longer included in the key
7115 when use_sender is false.
7117 26. Added "control = submission" modifier to ACLs.
7119 27. Added the ${base62d: operator to decode base 62 numbers.
7121 28. dnsdb lookups can now access SRV records.
7123 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7124 the configuration file.
7126 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7127 (-v) mode. This makes the output for a verbose queue run more intelligible.
7129 31. Added a use_postmaster feature to recipient callouts.
7131 32. Added the $body_zerocount variable, containing the number of binary zero
7132 bytes in the message body.
7134 33. The time of last modification of the "new" subdirectory is now used as the
7135 "mailbox time last read" when there is a quota error for a maildir
7138 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7140 35. Added +ignore_unknown as a special item in host lists.
7142 36. Code for decoding IPv6 addresses in host lists is now included, even if
7143 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7144 address was recognized as an IP address, but was then not correctly decoded
7145 into binary, causing unexpected and incorrect effects when compared with
7152 1. Very minor rewording of debugging text in manualroute to say "list of
7153 hosts" instead of "hostlist".
7155 2. If verify=header_syntax was set, and a header line with an unqualified
7156 address (no domain) and a large number of spaces between the end of the
7157 name and the colon was received, the reception process suffered a buffer
7158 overflow, and (when I tested it) crashed. This was caused by some obsolete
7159 code that should have been removed. The fix is to remove it!
7161 3. When running in the test harness, delay a bit after writing a bounce
7162 message to get a bit more predictability in the log output.
7164 4. Added a call to search_tidyup() just before forking a reception process. In
7165 theory, someone could use a lookup in the expansion of smtp_accept_max_
7166 per_host which, without the tidyup, could leave open a database connection.
7168 5. Added the variables $recipient_data and $sender_data which get set from a
7169 lookup success in an ACL "recipients" or "senders" condition, or a router
7170 "senders" option, similar to $domain_data and $local_part_data.
7172 6. Moved the writing of debug_print from before to after the "senders" test
7175 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7176 problems for message scanning, either using a data ACL, or using
7177 local_scan() because the Received: header was not generated till after they
7178 were called (in order to set the time as the time of reception completion).
7179 I have revised the way this works. The header is now generated after the
7180 body is received, but before the ACL or local_scan() are called. After they
7181 are run, the timestamp in the header is updated.
7187 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7188 before starting a queue runner without re-exec. This happened only when
7189 deliver_drop_privilege was set or when the Exim user was set to root. The
7190 effect of the bug was that timeouts during subsequent deliveries caused
7191 crashes instead of being properly handled. The handler is now left at its
7192 default (and expected) setting.
7194 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7195 message, again when deliver_drop_privilege is set or Exim is run as root.
7196 The bug described in (1) was not present in this case, but the tidying up
7197 of the other signals was missing. I have made the two cases consistent.
7199 3. The ignore_target_hosts setting on a manualroute router was being ignored
7200 for hosts that were looked up using the /MX notation.
7202 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7205 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7206 operated on the sender address. After changing the $sender_address to <>
7207 for the sender address verify, Exim was re-instated it as the original
7208 (before rewriting) address, but remembering that it had rewritten it, so it
7209 wasn't rewriting it again. This bug also had the effect of breaking the
7210 sender address verification caching when the sender address was rewritten.
7212 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7213 This has been changed so that if the ip literal address matches
7214 ignore_target_hosts, the router declines.
7216 7. Added expansion conditions match_domain, match_address, and match_local_
7217 part (NOT match_host).
7219 8. The placeholder for the Received: header didn't have a length field set.
7221 9. Added code to Exim itself and to exim_lock to test for a specific race
7222 condition that could lead to file corruption when using MBX delivery. The
7223 issue is with the lockfile that is created in /tmp. If this file is removed
7224 after a process has opened it but before that process has acquired a lock,
7225 there is the potential for a second process to recreate the file and also
7226 acquire a lock. This could lead to two Exim processes writing to the file
7227 at the same time. The added code performs the same test as UW imapd; it
7228 checks after acquiring the lock that its file descriptor still refers to
7229 the same named file.
7231 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7232 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7235 11. Added the smtp_active_hostname option. If used, this will typically be made
7236 to depend on the incoming interface address. Because $interface_address is
7237 not set up until the daemon has forked a reception process, error responses
7238 that can happen earlier (such as "too many connections") no longer contain
7241 12. If an expansion in a condition on a "warn" statement fails because a lookup
7242 defers, the "warn" statement is abandoned, and the next ACL statement is
7243 processed. Previously this caused the whole ACL to be aborted.
7245 13. Added the iplsearch lookup type.
7247 14. Added ident_timeout as a log selector.
7249 15. Added tls_certificate_verified as a log selector.
7251 16. Added a global option tls_require_ciphers (compare the smtp transport
7252 option of the same name). This controls incoming TLS connections.
7254 17. I finally figured out how to make tls_require_ciphers do a similar thing
7255 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7256 before starting the TLS session.
7258 18. Tabs are now shown as \t in -bP output.
7260 19. If the log selector return_path_on_delivery was set, Exim crashed when
7261 bouncing a message because it had too many Received: header lines.
7263 20. If two routers both had headers_remove settings, and the first one included
7264 a superfluous trailing colon, the final name in the first list and the
7265 first name in the second list were incorrectly joined into one item (with a
7266 colon in the middle).
7272 1. Added -C and -D options to the exinext utility, mainly to make it easier
7273 to include in the automated testing, but these could be helpful when
7274 multiple configurations are in use.
7276 2. The exinext utility was not formatting the output nicely when there was
7277 an alternate port involved in the retry record key, nor when there was a
7278 message id as well (for retries that were specific to a specific message
7279 and a specific host). It was also confused by IPv6 addresses, because of
7280 the additional colons they contain. I have fixed the IPv4 problem, and
7281 patched it up to do a reasonable job for IPv6.
7283 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7284 delivery, the log line now contains "pipelined" if PIPELINING was used.
7286 4. An SMTP transport process used to panic and die if the bind() call to set
7287 an explicit outgoing interface failed. This has been changed; it is now
7288 treated in the same way as a connect() failure.
7290 5. A reference to $sender_host_name in the part of a conditional expansion
7291 that was being skipped was still causing a DNS lookup. This no longer
7294 6. The def: expansion condition was not recognizing references to header lines
7295 that used bh_ and bheader_.
7297 7. Added the _cache feature to named lists.
7299 8. The code for checking quota_filecount in the appendfile transport was
7300 allowing one more file than it should have been.
7302 9. For compatibility with Sendmail, the command line option
7310 and sets the incoming protocol and host name (for trusted callers). The
7311 host name and its colon can be omitted when only the protocol is to be set.
7312 Note the Exim already has two private options, -pd and -ps, that refer to
7313 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7314 "s", but I don't think that's a major issue.
7316 10. A number of refactoring changes to the code, none of which should affect
7319 (a) The number of logging options was getting close to filling up the
7320 32-bit word that was used as a bit map. I have split them into two classes:
7321 those that are passed in the argument to log_write(), and those that are
7322 only ever tested independently outside of that function. These are now in
7323 separate 32-bit words, so there is plenty of room for expansion again.
7324 There is no change in the user interface or the logging behaviour.
7326 (b) When building, for example, log lines, the code previously used a
7327 macro that called string_cat() twice, in order to add two strings. This is
7328 not really sufficiently general. Furthermore, there was one instance where
7329 it was actually wrong because one of the argument was used twice, and in
7330 one call a function was used. (As it happened, calling the function twice
7331 did not affect the overall behaviour.) The macro has been replaced by a
7332 function that can join an arbitrary number of extra strings onto a growing
7335 (c) The code for expansion conditions now uses a table and a binary chop
7336 instead of a serial search (which was left over from when there were very
7337 few conditions). Also, it now recognizes conditions like "pam" even when
7338 the relevant support is not compiled in: a suitably worded error message is
7339 given if an attempt is made to use such a condition.
7341 11. Added ${time_interval:xxxxx}.
7343 12. A bug was causing one of the ddress fields not to be passed back correctly
7344 from remote delivery subprocesses. The field in question was not being
7345 subsequently used, so this caused to problems in practice.
7347 13. Added new log selectors queue_time and deliver_time.
7349 14. Might have fixed a bug in maildirsizefile handling that threw up
7350 "unexpected character" debug warnings, and recalculated the data
7351 unnecessarily. In any case, I expanded the warning message to give more
7354 15. Added the message "Restricted characters in address" to the statements in
7355 the default ACL that block characters like @ and % in local parts.
7357 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7358 Three changes have been made:
7360 (a) There was a serious bug; a negative response to MAIL caused the whole
7361 recipient domain to be cached as invalid, thereby blocking all messages
7362 to all local parts at the same domain, from all senders. This bug has
7363 been fixed. The domain is no longer cached after a negative response to
7364 MAIL if the sender used is not empty.
7366 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7369 (c) A new callout option, "use_sender" has been added for people who want
7370 the modified behaviour.
7376 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7379 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7380 indeed breaks things for older releases.
7382 3. Added additional logging to the case where there is a problem reading data
7383 from a filter that is running in a subprocess using a pipe, in order to
7384 try to track down a specific problem.
7386 4. Testing facility fudge: when running in the test harness and attempting
7387 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7388 getting "No route to host". Convert this to a timeout.
7390 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7393 6. Some OS don't have socklen_t but use size_t instead. This affects the
7394 fifth argument of getsockopt() amongst other things. This is now
7395 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7396 can be set for individual OS. I have set it for SunOS5, OSF1, and
7397 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7398 some earlier ones do not.
7400 7. Change 4.30/15 was not doing the test caselessly.
7402 8. The standard form for an IPv6 address literal was being rejected by address
7403 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7404 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7405 this, as well as the form without the "IPv6" on the front (but only when
7406 address literals are enabled, of course).
7408 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7410 10. Exim crashed if a message with an empty sender address specified by -f
7411 encountered a router with an errors_to setting. This could be provoked only
7412 by a command such as
7416 where an empty string was supplied; "<>" did not hit this bug.
7418 11. Installed PCRE release 4.5.
7420 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7421 remained set. It is now erased.
7423 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7424 times from message ids (which are base 36 rather than the normal 62).
7426 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7427 were being counted as actual protocol errors, and logged if the log
7428 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7429 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7430 and DATA following a set of rejected RCPTs do not count as protocol errors.
7431 In other words, Exim assumes they were pipelined, though this may not
7432 actually be the case. Of course, in all cases the client gets an
7433 appropriate error code.
7435 15. If a lookup fails in an ACL condition, a message about the failure may
7436 be available; it is used if testing the ACL cannot continue, because most
7437 such messages specify what the cause of the deferral is. However, some
7438 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7439 that caused an old message to be retained and used if a later statement
7440 caused a defer, replacing the real cause of the deferral.
7442 16. If an IP address had so many PTR records that the DNS lookup buffer
7443 was not large enough to hold them, Exim could crash while trying to process
7444 the truncated data. It now detects and logs this case.
7446 17. Further to 4.21/58, another change has been made: if (and only if) the
7447 first line of a message (the first header line) ends with CRLF, a bare LF
7448 in a subsequent header line has a space inserted after it, so as not to
7449 terminate the header.
7451 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7452 unnecessarily, used atoi() instead of strtol(), and didn't check the
7453 termination when getting file sizes from file names by regex.
7455 19. Completely re-implemented the support for maildirsize files, in the light
7456 of a number of problems with the previous contributed implementation
7457 (4.30/29). In particular:
7459 . If the quota is zero, the maildirsize file is maintained, but no quota is
7462 . If the maildir directory does not exist, it is created before any attempt
7463 to write a maildirsize file.
7465 . The quota value in the file is just a cache; if the quota is changed in
7466 the transport, the new value overrides.
7468 . A regular expression is available for excluding directories from the
7471 20. The autoreply transport checks the characters in options that define the
7472 message's headers; it allows continued headers, but it was checking with
7473 isspace() after an embedded newline instead of explicitly looking for a
7476 21. If all the "regular" hosts to which an address was routed had passed their
7477 expiry times, and had not reached their retry times, the address was
7478 bounced, even if fallback hosts were defined. Now Exim should go on to try
7481 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7482 equivalent code in the SMTP transport. Some hosts send humungous responses
7483 to HELO/EHLO, more than 1024 it seems.
7485 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7486 gives compiler warnings in some environments. I've now done it "properly",
7489 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7490 (because of problems with the built-in one) was declared to return uschar *
7491 instead of char *, causing compiler failure.
7493 25. Fixed a file descriptor leak when processing alias/forward files.
7495 26. Fixed a minor format string issue in dbfn.c.
7497 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7499 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7500 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7503 29. When a sender address is verified, it is cached, to save repeating the test
7504 when there is more than one recipient in a message. However, when the
7505 verification involves a callout, it is possible for different callout
7506 options to be set for different recipients. It is too complicated to keep
7507 track of this in the cache, so now Exim always runs a verification when a
7508 callout is required, relying on the callout cache for the optimization.
7509 The overhead is duplication of the address routing, but this should not be
7512 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7513 to be verified with callout=postmaster, and the main callout worked but the
7514 postmaster check failed, the verification correctly failed. However, if a
7515 subsequent RCPT command asked for sender verification *without* the
7516 postmaster check, incorrect caching caused this verification also to fail,
7519 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7520 it was not caching the DNS options (qualify_single, search_parents) that
7521 were used when the lookup failed. A subsequent lookup with different
7522 options therefore always gave the same answer, though there were cases
7523 where it should not have. (Example: a "domains = !$mx_any" option on a
7524 dnslookup router: the "domains" option is always processed without any
7525 widening, but the router might have qualify_single set.) Now Exim uses the
7526 cached value only when the same options are set.
7528 32. Added John Jetmore's "exipick" utility to the distribution.
7530 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7531 than a timeout (e.g. a certificate is required, and is not provided), an
7532 Exim server now closes the connection immediately. Previously it waited for
7533 the client to close - but if the client is SSL, it seems that they each
7534 wait for each other, leading to a delay before one of them times out.
7536 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7537 maintained 0.8.x compatibility because I don't think many are using it, and
7538 it is clearly obsolete.
7540 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7543 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7544 client certificate was expired. A simple patch fixes this, though I don't
7545 understand the full logic of why the verify callback is called multiple
7548 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7549 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7550 which causes problems with some clients (such as the Certicom SSL Plus
7551 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7552 disables the coutermeasure allowing Eudora to connect."
7554 38. Exim was not checking that a write() to a log file succeeded. This could
7555 lead to Bad Things if a log got too big, in particular if it hit a file
7556 size limit. Exim now panics and dies if it cannot write to a log file, just
7557 as it does if it cannot open a log file.
7559 39. Modified OS/Makefile-Linux so that it now contains
7561 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7563 The two -D definitions ensure that Exim is compiled with large file
7564 support, which makes it possible to handle log files that are bigger than
7567 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7568 instance) a domain was checked against a named list that involved a lookup,
7569 causing $domain_data to be set, then another domain was checked against the
7570 same list, then the first domain was re-checked, the value of $domain_data
7571 after the final check could be wrong. In particular, if the second check
7572 failed, it could be set empty. This bug probably also applied to
7575 41. The strip_trailing_dot option was not being applied to the address given
7576 with the -f command-line option.
7578 42. The code for reading a message's header from the spool was incrementing
7579 $received_count, but never initializing it. This meant that the value was
7580 incorrect (doubled) while delivering a message in the same process in which
7581 it was received. In the most common configuration of Exim, this never
7582 happens - a fresh exec is done - but it can happen when
7583 deliver_drop_privilege is set.
7585 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7586 it now includes up to 150 characters of the unexpected data in the log
7589 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7590 and building data strings. The size of both of these buffers was 10 000
7591 bytes - far larger than anybody would *ever* want, thought I. Needless to
7592 say, somebody hit the limit. I have increased the maximum line length to
7593 20 000 and the maximum data length of concatenated lines to 100 000. I have
7594 also fixed two bugs, because there was no checking on these buffers. Tsk,
7595 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7596 buffer is too small.
7598 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7599 lsearch lookups. Now it does.
7601 46. When parsing a route_list item in a manualroute router, a fixed-length
7602 buffer was used for the list of hosts. I made this 1024 bytes long,
7603 thinking that nobody would ever have a list of hosts that long. Wrong.
7604 Somebody had a whole pile of complicated expansion conditions, and the
7605 string was silently truncated, leading to an expansion error. It turns out
7606 that it is easier to change to an unlimited length (owing to other changes
7607 that have happened since this code was originally written) than to build
7608 structure for giving a limitation error. The length of the item that
7609 expands into the list of hosts is now unlimited.
7611 47. The lsearch lookup could not handle data where the length of text line was
7612 more than 4095 characters. Such lines were truncated, leading to shortened
7613 data being returned. It should now handle lines of any length.
7615 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7616 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7619 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7620 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7621 no longer happens in comment lines. A list of replacements is now placed
7622 at the head of all of the source files, except those whose only change is
7623 to replace PERL_COMMAND in the very first #! line.
7625 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7626 messages on the queue, with a bottom-up merge sort, using code contributed
7627 by Michael Haardt. This should make operations like -bp somewhat faster on
7628 large queues. It won't affect queue runners, except when queue_run_in_order
7631 51. Installed eximstats 1.31 in the distribution.
7633 52. Added support for SRV lookups to the dnslookup router.
7635 53. If an ACL referred to $message_body or $message_body_end, the value was not
7636 reset for any messages that followed in the same SMTP session.
7638 54. The store-handling optimization for building very long strings was not
7639 differentiating between the different store pools. I don't think this
7640 actually made any difference in practice, but I've tidied it.
7642 55. While running the routers to verify a sender address, $sender_address
7643 was still set to the sender address. This is wrong, because when routing to
7644 send a bounce to the sender, it would be empty. Therefore, I have changed
7645 it so that, while verifying a sender address, $sender_address is set to <>.
7646 (There is no change to what happens when verifying a recipient address.)
7648 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7649 target A or AAAA records (if not already returned) without resetting the
7650 qualify_single or search_parents options of the DNS resolver. These are
7651 inappropriate in this case because the targets of MX and SRV records must
7652 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7653 target that, when qualified, matched something in the local domain. These
7654 two options are now turned off when doing these lookups.
7656 57. It seems that at least some releases of Reiserfs (which does not have the
7657 concept of a fixed number of inodes) returns zero and not -1 for the
7658 number of available inodes. This interacted badly with check_spool_inodes,
7659 which assumed that -1 was the "no such thing" setting. What I have done is
7660 to check that the total number of inodes is greater than zero before doing
7661 the test of how many are available.
7663 58. When a "warn" ACL statement has a log_message modifier, the message is
7664 remembered, and not repeated. This is to avoid a lot of repetition when a
7665 message has many recipients that cause the same warning to be written.
7666 However, Exim was preserving the list of already written lines for an
7667 entire SMTP session, which doesn't seem right. The memory is now reset if a
7668 new message is started.
7670 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7671 debugging output unless log_rewrite was also set.
7673 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7674 of (int)(handle) when we know that handle contains (void *)(-1).
7676 61. The Exim daemon panic-logs an error return when it closes the incoming
7677 connection. However "connection reset by peer" seems to be common, and
7678 isn't really an error worthy of noting specially, so that particular error
7681 62. When Exim is trying to find all the local interfaces, it used to panic and
7682 die if the ioctl to get the interface flags failed. However, it seems that
7683 on at least one OS (Solaris 9) it is possible to have an interface that is
7684 included in the list of interfaces, but for which you get a failure error
7685 for this call. This happens when the interface is not "plumbed" into a
7686 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7687 failure of the "get flags" call assumes that the interface is down.
7689 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7690 makes life easier for people who are doing arithmetic on fields extracted
7691 from dates, where you often get leading zeros that should not be
7692 interpreted as octal.
7694 64. Added qualify_domain to the redirect router, to override the global
7697 65. If a pathologically long header line contained very many addresses (the
7698 report of this problem mentioned 10 000) and each of them was rewritten,
7699 Exim could use up a very large amount of memory. (It kept on making new
7700 copies of the header line as it rewrote, and never released the old ones.)
7701 At the expense of a bit more processing, the header rewriting function has
7702 been changed so that it no longer eats memory in this way.
7704 66. The generation of the Received: header has been moved from the time that a
7705 message starts to be received, to the time that it finishes. The timestamp
7706 in the Received: header should now be very close to that of the <= log
7707 line. There are two side-effects of this change:
7709 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7710 logged header lines no longer include the local Received: line, because
7711 it has not yet been created. The same applies to a copy of the message
7712 that is returned to a non-SMTP sender when a message is rejected.
7714 (b) When a filter file is tested using -bf, no additional Received: header
7715 is added to the test message. After some thought, I decided that this
7718 This change does not affect the value of $received_for. It is still set
7719 after address rewriting, but before local_scan() is called.
7721 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7723 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7724 gave an unhelpful panic error message, and a defer error. I have managed to
7725 change this behaviour so that it now rejects any supplied certificate,
7726 which seems right, as the list of acceptable certificates is empty.
7728 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7729 gave an unhelpful defer error. I have not managed to make this reject any
7730 supplied certificates, but the error message it gives is "no certificate
7731 supplied", which is not helpful.
7733 70. exigrep's output now also includes lines that are not associated with any
7734 message, but which match the given pattern. Implemented by a patch from
7735 Martin Sluka, which also tidied up the Perl a bit.
7737 71. Recipient callout verification, like sender verification, was using <> in
7738 the MAIL FROM command. This isn't really the right thing, since the actual
7739 sender may affect whether the remote host accepts the recipient or not. I
7740 have changed it to use the actual sender in the callout; this means that
7741 the cache record is now keyed on a recipient/sender pair, not just the
7742 recipient address. There doesn't seem to be a real danger of callout loops,
7743 since a callout by the remote host to check the sender would use <>.
7744 [SEE ABOVE: changed after hitting problems.]
7746 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7747 temporary errors. However, in the case of such a code being given after
7748 the end of a data transmission (i.e. after ".") Exim was failing to write
7749 a retry record for the message. (Yes, there was some broken host that was
7750 actually sending 8xx at this point.)
7752 73. An unknown lookup type in a host list could cause Exim to panic-die when
7753 the list was checked. (An example that provoked this was putting <; in the
7754 middle of a list instead of at the start.) If this happened during a DATA
7755 ACL check, a -D file could be left lying around. This kind of configuration
7756 error no longer causes Exim to die; instead it causes a defer error. The
7757 incident is still logged to the main and panic logs.
7759 74. Buglet left over from Exim 3 conversion. The message "too many messages
7760 in one connection" was written to the rejectlog but not the mainlog, except
7761 when address rewriting (yes!) was being logged.
7763 75. Added write_rejectlog option.
7765 76. When a system filter was run not as root (that is, when system_filter_user
7766 was set), the values of the $n variables were not being returned to the
7767 main process; thus, they were not subsequently available in the $sn
7770 77. Added +return_path_on_delivery log selector.
7772 78. A connection timeout was being treated differently from recipients deferred
7773 when testing hosts_max_try with a message that was older than the host's
7774 retry timeout. (The host should not be counted, thus allowing all hosts to
7775 be tried at least once before bouncing.) This may have been the cause of an
7776 occasionally reported bug whereby a message would remain on the queue
7777 longer than the retry timeout, but would be bounced if a delivery was
7778 forced. I say "may" because I never totally pinned down the problem;
7779 setting up timeout/retry tests is difficult. See also the next item.
7781 79. The ultimate address timeout was not being applied to errors that involved
7782 a combination of host plus message (for example, a timeout on a MAIL
7783 command). When an address resolved to a number of possible hosts, and they
7784 were not all tried for each delivery (e.g. because of hosts_max_try), a
7785 message could remain on the queue longer than the retry timeout.
7787 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7790 81. Fixed an obscure SMTP outgoing bug which required at least the following
7791 conditions: (a) there was another message waiting for the same server;
7792 (b) the server returned 5xx to all RCPT commands in the first message so
7793 that the message was not completed; (c) the server dropped the connection
7794 or gave a negative response to the RSET that Exim sends to abort the
7795 transaction. The observed case was a dropped connection after DATA that had
7796 been sent in pipelining mode. That is, the server had advertised PIPELINING
7797 but was not implementing it correctly. The effect of the bug was incorrect
7798 behaviour, such as trying another host, and this could lead to a crash.
7804 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7805 and daemon.c were passed as pointers to ints; they should have been
7806 pointers to socklen_t variables (which are typically unsigned ints).
7808 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7811 3. Fixed a really odd bug that affected only the testing scheme; patching a
7812 certain fixed string in the binary changed the value of another string that
7813 happened to be identical to the end of the original first string.
7815 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7816 name", it returns that address as the IP address. On some operating
7817 systems (e.g. Solaris), it also passes back the IP address string as the
7818 "host name". However, on others (e.g. Linux), it passes back an empty
7819 string. Exim wasn't checking for this, and was changing the host name to an
7820 empty string, assuming it had been canonicalized.
7822 5. Although rare, it is permitted to have more than one PTR record for a given
7823 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7824 all the names associated with an address, because they do in Solaris.
7825 However, it seems that they do not in Linux for data that comes from the
7826 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7827 I found this out when I moved to a new Linux workstation and tried to run
7828 the Exim test suite.
7830 To get round this problem I have changed the code so that it now does its
7831 own call to the DNS to look up PTR records when searching for a host name.
7832 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7833 addresses that are only in /etc/hosts are still found.
7835 This behaviour is, however, controlled by an option called host_lookup_
7836 order, which defaults to "bydns:byaddr". If people want to use the other
7837 order, or indeed, just use one or the other means of lookup, they can
7838 specify it in this variable.
7840 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7841 some operating systems, this comes back from gethostbyaddr() as an empty
7842 string, and this is what Exim used to test for. However, it seems that in
7843 other systems, "." is yielded. Exim now tests for this case too.
7845 7. The values of check_spool_space and check_log_space are now held internally
7846 as a number of kilobytes instead of an absolute number of bytes. If a
7847 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7848 kilobyte. This means that much larger values can be stored.
7850 8. Exim monitor: an attempt to get the action menu when not actually pointing
7851 at a message produces an empty menu entitled "No message selected". This
7852 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7853 no entries in it ("Shell widget menu has zero width and/or height"). So I
7854 have added a single, blank menu entry in this case.
7856 9. Added ${quote_local_part.
7858 10. MIME decoding is now applied to the contents of Subject: header lines when
7861 11. Now that a reference to $sender_host_address automatically causes a reverse
7862 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7863 host lookup before query-style lookups in lists that might use this
7864 variable. This has therefore been abolished, and the "net-" prefix is no
7865 longer necessary for query-style lookups.
7867 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7868 have been a typo for LFLAGS, so it has been changed.
7870 13. The install script calls Exim with "-C /dev/null" in order to find the
7871 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7872 to be output. However, since Exim outputs its version number before the
7873 error, it didn't break the script. It just looked ugly. I fixed this by
7874 always allowing "-C /dev/null" if the caller is root.
7876 14. Ignore overlarge ACL variable number when reading spool file - insurance
7877 against a later release with more variables having written the file.
7879 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7880 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7881 this, as well as the form without the "IPv6" on the front.
7883 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7884 OS/Makefile-Darwin file.
7886 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7887 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7889 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7890 variable. However, some OS use ints for inodes. I've added cast to long int
7891 to get rid of the compiler warning.
7893 19. I had forgotten to lock out "/../" in configuration file names when
7894 ALT_CONFIG_PREFIX was set.
7896 20. Routers used for verification do not need to specify transports. However,
7897 if such a router generated a host list, and callout was configured, Exim
7898 crashed, because it could not find a port number from the (non-existent)
7899 transport. It now assumes port 25 in this circumstance.
7901 21. Added the -t option to exigrep.
7903 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7904 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7905 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7906 them is set, LOOKUP_LSEARCH is forced.
7908 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7910 24. Added sender and host information to the "rejected by local_scan()" log
7911 line; previously there was no indication of these.
7913 25. Added .include_if_exists.
7915 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7916 Linux. It turns out that not all file systems support this. Apparently some
7917 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7918 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7919 not supported on the file descriptor, is now ignored when Exim is trying to
7920 sync a directory. This applies only to Linux.
7922 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7924 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7925 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7928 29. Added support for maildirsize files from supplied patch (modified a bit).
7930 30. The use of :fail: followed by an empty string could lead Exim to respond to
7931 sender verification failures with (e.g.):
7933 550 Verification failed for <xxx>
7934 550 Sender verify failed
7936 where the first response line was missing the '-' that indicates it is not
7937 the final line of the response.
7939 31. The loop for finding the name of the user that called Exim had a hardwired
7940 limit of 10; it now uses the value of finduser_retries, which is used for
7941 all other user lookups.
7943 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7946 33. Exim was neglecting to zero errno before one call of strtol() when
7947 expanding a string and expecting an integer value. On some systems this
7948 resulted in spurious "integer overflow" errors. Also, it was casting the
7949 result into an int without checking.
7951 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7952 did not work. The code looks as if it has *never* worked, though it appears
7953 to have been documented since at least release 1.62. I have made it work.
7955 35. The "timeout_DNS" error in retry rules, also documented since at least
7956 1.62, also never worked. As it isn't clear exactly what this means, and
7957 clearly it isn't a major issue, I have abolished the feature by treating it
7958 as "timeout", and writing a warning to the main and panic logs.
7960 36. The display of retry rules for -brt wasn't always showing the error code
7963 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7964 timeout_connect_A, timeout_connect_MX.
7966 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7967 to the empty sender.
7969 39. The daemon was not analysing the content of -oX till after it had closed
7970 stderr and disconnected from the controlling terminal. This meant that any
7971 syntax errors were only noted on the panic log, and the return code from
7972 the command was 0. By re-arranging the code a little, I've made the
7973 decoding happen first, so such errors now appear on stderr, and the return
7974 code is 1. However, the actual setting up of the sockets still happens in
7975 the disconnected process, so errors there are still only recorded on the
7978 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7979 connections (as happens on some IP stacks) was logged at start up time as
7980 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7981 it from "IPv6 and IPv4", which means that two separate sockets are being
7984 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7985 says whether AF_INET or AF_INET6 was passed as an argument.
7987 42. Exiwhat output was messed up when time zones were included in log
7990 43. Exiwhat now gives more information about the daemon's listening ports,
7991 and whether -tls-on-connect was used.
7993 44. The "port" option of the smtp transport is now expanded.
7995 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7996 silently ignored. Now an error message is written to the main and panic
7999 46. There's a new ACL modifier called "logwrite" which writes to a log file
8000 as soon as it is encountered.
8002 47. Added $local_user_uid and $local_user_gid at routing time.
8004 48. Exim crashed when trying to verify a sender address that was being
8007 49. Exim was recognizing only a space character after ".include". It now also
8008 recognizes a tab character.
8010 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
8011 extracting the relevant information from the specification. The man page no
8012 longer contains scrambled data for the -d option, and I've added a section
8013 at the front about calling Exim under different names.
8015 51. Added "extra_headers" argument to the "mail" command in filter files.
8017 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
8020 53. Installed eximstats 1.29.
8022 54. Added transport_filter_timeout as a generic transport option.
8024 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
8025 Cc: header lines. This was required by RFC 822, but it not required by RFC
8028 56. Exim used to add From:, Date:, and Message-Id: header lines to any
8029 incoming messages that did not have them. Now it does so only if the
8030 message originates locally, that is, if there is no associated remote host
8031 address. When Resent- header lines are present, this applies to the Resent-
8032 lines rather than the non-Resent- lines.
8034 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
8035 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
8037 58. Messages for configuration errors now include the name of the main
8038 configuration file - useful now that there may be more than one file in a
8039 list (.included file names were always shown).
8041 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
8042 for those rare installations that do not start the daemon as root or run it
8043 setuid root. I've cut out the call to initgroups() if the daemon is not
8046 60. The Exim user and group can now be bound into the binary as text strings
8047 that are looked up at the start of Exim's processing.
8049 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
8051 62. Added $mailstore_basename variable.
8053 63. Installed patch to sieve.c from Michael Haardt.
8055 64. When Exim failed to open the panic log after failing to open the main log,
8056 the original message it was trying to log was written to stderr and debug
8057 output, but if they were not available (the usual case in production), it
8058 was lost. Now it is written to syslog before the two lines that record the
8059 failures to open the logs.
8061 65. Users' Exim filters run in subprocesses under the user's uid. It is
8062 possible for a "deliver" command or an alias in a "personal" command to
8063 provoke an address rewrite. If logging of address rewriting is configured,
8064 this fails because the process is not running as root or exim. There may be
8065 a better way of dealing with this, but for the moment (because 4.30 needs
8066 to be released), I have disabled address rewrite logging when running a
8067 filter in a non-root, non-exim process.
8073 1. The buildconfig auxiliary program wasn't quoting the value set for
8074 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8075 not defined. This bug was masked in 4.22 by the effect that was fixed in
8078 2. Some messages that were rejected after a message id was allocated were
8079 shown as "incomplete" by exigrep. It no longer does this for messages that
8080 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8082 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8083 have allow_domain_literals set, the ID did not get logged in the <= line.
8084 Domain literals are now always recognized in Message-ID: header lines.
8086 4. The first argument for a ${extract expansion item is the key name or field
8087 number. Leading and trailing spaces in this item were not being ignored,
8088 causing some misleading effects.
8090 5. When deliver_drop_privilege was set, single queue runner processes started
8091 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8092 same command in the process it spins off) were not dropping privilege.
8094 6. When the daemon running as "exim" started a queue runner, it always
8095 re-executed Exim in the spun-off process. This is a waste of effort when
8096 deliver_drop_privilege is set. The new process now just calls the
8097 queue-runner function directly.
8103 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8106 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8107 ignored. Though the use of -oP was forcing the writing of a pid file, it
8108 was always written to the default place.
8110 3. If the message "no IP address found for host xxxx" is generated during
8111 incoming verification, it is now followed by identification of the incoming
8112 connection (so you can more easily find what provoked it).
8114 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8116 5. Added some features to "harden" Exim a bit more against certain attacks:
8118 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8119 be put in Local/Makefile. This is like the never_users runtime option,
8120 but it cannot be overridden. The default setting is "root".
8122 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8123 prefix string with which any file named in a -C command line option
8126 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8127 is retained for -C and -D only if the caller of Exim is root. Without
8128 it, the exim user may also use -C and -D and retain privilege.
8130 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8131 command line option is disabled.
8133 6. Macro names set by the -D option must start with an upper case letter, just
8134 like macro names defined in the configuration file.
8136 7. Added "dereference=" facility to LDAP.
8138 8. Two instances of the typo "uknown" in the source files are fixed.
8140 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8141 the Configure-Makefile script screwed up while processing it.
8143 10. Incorporated PCRE 4.4.
8145 11. The SMTP synchronization check was not operating right at the start of an
8146 SMTP session. For example, it could not catch a HELO sent before the client
8147 waited for the greeting. There is now a check for outstanding input at the
8148 point when the greeting is written. Because of the duplex, asynchronous
8149 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8150 way, but not yet received, when the check is performed.
8152 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8153 on TCP/IP sockets, because this apparently causes some broken clients to
8156 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8157 unchanged) from the Cygwin maintainer.
8159 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8160 was supported instead of testing for mbx. Effectively a typo.
8162 15. The spa authenticator server code was not checking that the input it
8163 received was valid base64.
8165 16. The debug output line for the "set" modifier in ACLs was not showing the
8166 name of the variable that was being set.
8168 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8170 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8171 lookup on its own. Something else was needed to trigger the lookup. For
8172 example, a match in host_lookup or the need for a host name in a host list.
8173 Now, if $sender_host_name is referenced and the host name has not yet been
8174 looked up, a lookup is performed. If the lookup fails, the variable remains
8175 empty, and $host_lookup_failed is set to "1".
8177 19. Added "eqi" as a case-independent comparison operator.
8179 20. The saslauthd authentication condition could segfault if neither service
8180 nor realm was specified.
8182 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8183 error message that was logged was misleading, and incoming SMTP
8184 connections were dropped. The message is now more accurate, and temporary
8185 errors are given to SMTP connections.
8187 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8188 (except RSET) with a 421 error, until QUIT is received. However, it was
8189 failing to send a response to QUIT.
8191 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8192 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8193 ACL is now run after the helo_try_verify_hosts code.
8195 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8196 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8197 case-independent, so other case variants are also recognized). Apparently
8198 some systems use these upper case variants.
8200 25. If more than two messages were waiting for the same host, and a transport
8201 filter was specified for the transport, Exim sent two messages over the
8202 same TCP/IP connection, and then failed with "socket operation on non-
8203 socket" when it tried to send the third.
8205 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8207 27. The extern definition of crypt16() in expand.c was not being excluded when
8208 the OS had its own crypt16() function.
8210 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8211 as a preferred synonym for return_size_limit, both as an option and as an
8214 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8216 30. Changed the default configuration ACL to relax the local part checking rule
8217 for addresses that are not in any local domains. For these addresses,
8218 slashes and pipe symbols are allowed within local parts, but the sequence
8219 /../ is explicitly forbidden.
8221 31. SPA server authentication was not clearing the challenge buffer before
8224 32. log_message in a "warn" ACL statement was writing to the reject log as
8225 well as to the main log, which contradicts the documentation and doesn't
8226 seem right (because no rejection is happening). So I have stopped it.
8228 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8229 However, I am unable to do any testing of this.
8231 34. Fixed an infelicity in the appendfile transport. When checking directories
8232 for a mailbox, to see if any needed to be created, it was accidentally
8233 using path names with one or more superfluous leading slashes; tracing
8234 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8236 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8237 contents are added to the log line that is written for every discarded
8238 recipient. (Previously a log_message setting was ignored.)
8240 36. The ${quote: operator now quotes the string if it is empty.
8242 37. The install script runs exim in order to find its version number. If for
8243 some reason other than non-existence or emptiness, which it checks, it
8244 could not run './exim', it was installing it with an empty version number,
8245 i.e. as "exim-". This error state is now caught, and the installation is
8248 38. An argument was missing from the function that creates an error message
8249 when Exim fails to connect to the socket for saslauthd authentication.
8250 This could cause Exim to crash, or give a corrupted message.
8252 39. Added isip, isip4, and isip6 to ${if conditions.
8254 40. The ACL variables $acl_xx are now saved with the message, and can be
8255 accessed later in routers, transports, and filters.
8257 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8258 strings in the file are not string-expanded.
8260 42. If a MAIL command specified a SIZE value that was too large to fit into an
8261 int variable, the check against message_size_limit failed. Such values are
8262 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8263 day this will have to be increased, but I don't think I want to be around
8264 when emails are that large.
8271 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8272 iconv() is not standard in FreeBSD.
8274 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8275 IPv6 enabled. The observed symptom was a segmentation fault on return from
8276 the function os_common_find_running_interfaces() in src/os.c.
8278 3. In the check_special_case() function in daemon.c I had used "errno" as an
8279 argument name, which causes warnings on some systems. This was basically a
8280 typo, since it was named "eno" in the comments!
8282 4. The code that waits for the clock to tick (at a resolution of some fraction
8283 of a second) so as to ensure message-id uniqueness was always waiting for
8284 at least one whole tick, when it could have waited for less. [This is
8285 almost certainly not relevant at current processor speeds, where it is
8286 unlikely to ever wait at all. But we try to future-proof.]
8288 5. The function that sleeps for a time interval that includes fractions of a
8289 second contained a race. It did not block SIGALRM between setting the
8290 timer, and suspending (a couple of lines later). If the interval was short
8291 and the sigsuspend() was delayed until after it had expired, the suspension
8292 never ended. On busy systems this could lead to processes getting stuck for
8295 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8296 process, before it forks any delivery processes. The open lookup caching
8297 mechanism meant that the open file or database connection was passed into
8298 the delivery process. The problem was that delivery processes always tidy
8299 up cached lookup data. This could cause a problem for the next delivery
8300 process started by the queue runner, because the external queue runner
8301 process does not know about the closure. So the next delivery process
8302 still has data in the lookup cache. In the case of a file lookup, there was
8303 no problem because closing a file descriptor in a subprocess doesn't affect
8304 the parent. However, if the lookup was caching a connection to a database,
8305 the connection was closed, and the second delivery process was likely to
8306 see errors such as "PGSQL: query failed: server closed the connection
8307 unexpectedly". The problem has been fixed by closing all cached lookups
8308 in a queue runner before running a delivery process.
8310 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8311 seem to have the "const" qualifier which it has on other OS. I've
8314 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8315 *of the same type* (client or server) with the same public name that an
8316 error should be diagnosed.
8318 9. When Exim looked up a host name for an IP address, but failed to find the
8319 original IP address when looking up the host name (a safety check), it
8320 output the message "<ip address> does not match any IP for NULL", which was
8321 confusing, to say the least. The bug was that the host name should have
8322 appeared instead of "NULL".
8324 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8325 user that is built into the binary, and the -C or -D options is used, root
8326 privilege is dropped before the configuration file is read. In addition,
8327 logging is switched to stderr instead of the normal log files. If the
8328 configuration then re-defines the Exim user, the unprivileged environment
8329 is probably not what is expected, so Exim logs a panic warning message (but
8332 However, if deliver_drop_privilege is set, the unprivileged state may well
8333 be exactly what is intended, so the warning has been cut out in that case,
8334 and Exim is allowed to try to write to its normal log files.
8340 1. smtp_return_error_details was not giving details for temporary sender
8341 or receiver verification errors.
8343 2. Diagnose a configuration error if two authenticators have the same public
8346 3. Exim used not to create the message log file for a message until the first
8347 delivery attempt. This could be confusing when incoming messages were held
8348 for policy or load reasons. The message log file is now created at the time
8349 the message is received, and an initial "Received" line is written to it.
8351 4. The automatically generated man page for command line options had a minor
8352 bug that caused no ill effects; however, a more serious problem was that
8353 the procedure for building the man page automatically didn't always
8354 operate. Consequently, release 4.20 contains an out-of-date version. This
8355 shouldn't happen again.
8357 5. When building Exim with embedded Perl support, the script that builds the
8358 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8359 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8361 6. The freeze_tell option was not being used for messages that were frozen on
8362 arrival, either by an ACL or by local_scan().
8364 7. Added the smtp_incomplete_transaction log selector.
8366 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8367 was accepting AUTH without a new EHLO.
8369 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8370 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8373 10. Logging of TCP/IP connections (when configured) now happens in the main
8374 daemon process instead of the child process, so that the TCP/IP connection
8375 count is more accurate (but it can never be perfect).
8377 11. The use of "drop" in a nested ACL was not being handled correctly in the
8378 outer ACL. Now, if condition failure induced by the nested "drop" causes
8379 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8380 or "require"), the connection is dropped.
8382 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8383 that yield "discard" can now be used with an "accept" or a "discard" verb,
8384 but an error is generated for any others (because I can't see a useful way
8385 to define what should happen).
8387 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8388 are now processed in the same way as lines in the Exim configuration file.
8389 In particular, continuation lines are supported.
8391 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8393 15. Added -ti meaning -t -i.
8395 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8396 domains, and warn by logging if others are found.
8398 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8399 returned from GIFCONF when Exim is trying to find the list of interfaces on
8400 a host. The code in os.c has been modified to copy each ifreq to an aligned
8401 structure in all cases.
8403 Also, in some cases, the returned ifreq's were being copied to a 'struct
8404 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8405 means the last couple of bytes of an IPv6 address could be chopped if the
8406 ifreq contained only a normal sockaddr (14 bytes storage).
8408 18. Named domain lists were not supported in the hosts_treat_as_local option.
8409 An entry such as +xxxx was not recognized, and was treated as a literal
8412 19. Ensure that header lines added by a DATA ACL are included in the reject log
8413 if the ACL subsequently rejects the message.
8415 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8416 MD5 (which is deprecated).
8418 21. When testing a filter file using -bf, Exim was writing a message when it
8419 took the sender from a "From " line in the message, but it was not doing so
8420 when it took $return_path from a Return-Path: header line. It now does.
8422 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8423 with a valid header line field name (a series of printing characters
8424 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8426 23. Changed "disc" in the source to "disk" to conform to the documentation and
8427 the book and for uniformity.
8429 24. Ignore Sendmail's -Ooption=value command line item.
8431 25. When execve() failed while trying to run a command in a pipe transport,
8432 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8433 could be confused with a return value of 69 from the command itself. This
8434 has been changed to 127, the value the shell returns if it is asked to run
8435 a non-existent command. The wording for the related log line suggests a
8436 non-existent command as the problem.
8438 26. If received_header_text expands to an empty string, do not add a Received:
8439 header line to the message. (Well, it adds a token one on the spool, but
8440 marks it "old" so that it doesn't get used or transmitted.)
8442 27. Installed eximstats 1.28 (addition of -nt option).
8444 28. There was no check for failure on the call to getsockname() in the daemon
8445 code. This can fail if there is a shortage of resources on the system, with
8446 ENOMEM, for example. A temporary error is now given on failure.
8448 29. Contrary to the C standard, it seems that in some environments, the
8449 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8450 program. Exim now does this explicitly; it affects the formatting of
8451 timestamps using strftime().
8453 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8454 complaints. I've now initialized all the variables, to avoid this.
8456 32. Header lines added by a system filter were not being "seen" during
8457 transport-time rewrites.
8459 33. The info_callback() function passed to OpenSSL is set up with type void
8460 (*)(SSL *, int, int), as described somewhere. However, when calling the
8461 function (actually a macro) that sets it up, the type void(*)() is
8462 expected. I've put in a cast to prevent warnings from picky compilers.
8464 34. If a DNS black list lookup found a CNAME record, but there were no A
8465 records associated with the domain it pointed at, Exim crashed.
8467 35. If a DNS black list lookup returned more than one A record, Exim ignored
8468 all but the first. It now scans all returned addresses if a particular IP
8469 value is being sought. In this situation, the contents of the
8470 $dnslist_value variable are a list of all the addresses, separated by a
8473 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8474 to accept a host name and all its aliases if the forward lookup for any of
8475 them yielded the IP address of the incoming connection. Now it accepts only
8476 those names whose forward lookup yields the correct IP address. Any other
8477 names are discarded. This closes a loophole whereby a rogue DNS
8478 administrator could create reverse DNS records to break through a
8479 wildcarded host restriction in an ACL.
8481 37. If a user filter or a system filter that ran in a subprocess used any of
8482 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8483 the wrong values were passed to the pipe command ($thisaddress had the
8484 value of $0, $0 had the value of $1, etc). This bug was introduced by
8485 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8487 38. Improved the line breaking for long SMTP error messages from ACLs.
8488 Previously, if there was no break point between 40 and 75 characters, Exim
8489 left the rest of the message alone. Two changes have been made: (a) I've
8490 reduced the minimum length to 35 characters; (b) if it can't find a break
8491 point between 35 and 75 characters, it looks ahead and uses the first one
8492 that it finds. This may give the occasional overlong line, but at least the
8493 remaining text gets split now.
8495 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8496 file descriptors might be low, and that setting 1000 would always raise it.
8497 It turns out that in some environments, the limit is already over 1000 and
8498 that lowering it causes trouble. So now Exim takes care not to decrease it.
8500 40. When delivering a message, the value of $return_path is set to $sender_
8501 address at the start of routing (routers may change the value). By an
8502 oversight, this default was not being set up when an address was tested by
8503 -bt or -bv, which affected the outcome if any router or filter referred to
8506 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8507 log only when "message" or "log_message" are set. However, if one of the
8508 conditions was an address verification, or a call to a nested ACL, the
8509 messages generated by the underlying test were being passed through. This
8510 no longer happens. The underlying message is available in $acl_verify_
8511 message for both "message" and "log_message" expansions, so it can be
8512 passed through if needed.
8514 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8515 new expansion $bh_ to give the encoded byte string without charset
8516 translation. Translation happens only if iconv() is available; HAVE_ICONV
8517 indicates this at build time. HEADERS_CHARSET gives the charset to
8518 translate to; headers_charset can change it in the configuration, and
8519 "headers charset" can change it in an individual filter file.
8521 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8522 that creates RFC 2047 encoded "words" labels them as that charset instead
8523 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8524 expansion operator; (ii) when Exim creates a From: line for a local
8525 message; (iii) when a header line is rewritten to include a "phrase" part.
8527 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8528 buggy, causing it to skip the first lines of messages whose message ID
8529 ended in 'D'. This would not have bitten before Exim release 4.14, because
8530 message IDs were unlikely to end in 'D' before then. The effect was to have
8531 incorrect size information for certain domains.
8533 45. #include "config.h" was missing at the start of the crypt16.c module. This
8534 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8537 46. If there was a timeout during a "random" callout check, Exim treated it as
8538 a failure of the random address, and carried on sending RSET and the real
8539 address. If the delay was just some slowness somewhere, the response to the
8540 original RCPT would be taken as a response to RSET and so on, causing
8541 mayhem of various kinds.
8543 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8544 when I implemented it. It didn't allow for the fact that some option values
8545 may legitimately be negative (e.g. size_addition), and it didn't even do
8546 the right test for positive values.
8548 48. Domain names in DNS records are case-independent. Exim always looks them up
8549 in lower case. Some resolvers return domain names in exactly the case they
8550 appear in the zone file, that is, they may contain uppercase letters. Not
8551 all resolvers do this - some return always lower case. Exim was treating a
8552 change of case by a resolver as a change of domain, similar to a widening
8553 of a domain abbreviation. This triggered its re-routing code and so it was
8554 trying to route what was effectively the same domain again. This normally
8555 caused routing to fail (because the router wouldn't handle the domain
8556 twice). Now Exim checks for this case specially, and just changes the
8557 casing of the domain that it ultimately uses when it transmits the message
8560 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8563 50. If a filter generated a file delivery with a non-absolute name (possible if
8564 no home directory exists for the router), the forbid_file option was not
8567 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8568 the existing equality matching.
8570 52. Exim was using ints instead of ino_t variables in some places where it was
8571 dealing with inode numbers.
8573 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8574 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8575 called TMPDIR, and if it finds it is different, it changes its value.
8577 54. The smtp_printf() function is now made available to local_scan() so
8578 additional output lines can be written before returning. There is also an
8579 smtp_fflush() function to enable the detection of a dropped connection.
8580 The variables smtp_input and smtp_batched_input are exported to
8583 55. Changed the default runtime configuration: the message "Unknown user"
8584 has been removed from the ACL, and instead placed on the localuser router,
8585 using the cannot_route_message feature. This means that any verification
8586 failures that generate their own messages won't get overridden. Similarly,
8587 the "Unrouteable address" message that was in the ACL for unverifiable
8588 relay addresses has also been removed.
8590 56. Added hosts_avoid_esmtp to the smtp transport.
8592 57. The exicyclog script was not checking for the esoteric option
8593 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8594 will work only if exicyclog is run under the appropriate euid.
8596 58. Following a discussion on the list, the rules by which Exim recognises line
8597 endings on incoming messages have been changed. The -dropcr and drop_cr
8598 options are now no-ops, retained only for backwards compatibility. The
8599 following line terminators are recognized: LF CRLF CR. However, special
8600 processing applies to CR:
8602 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8603 nor a local message in the state where . is a terminator.
8605 (ii) If a bare CR is encountered in a header line, an extra space is added
8606 after the line terminator so as not to end the header. The reasoning
8607 behind this is that bare CRs in header lines are most likely either
8608 to be mistakes, or people trying to play silly games.
8610 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8611 was being incorrectly given as 18 bytes larger than it should have been.
8612 This is a VOB (very old bug).
8614 60. This may never have affected anything current, but just in case it has:
8615 When the local host is found other than at the start of a list of hosts,
8616 the local host, those with the same MX, and any that follow, are discarded.
8617 When the list in question was part of a longer list of hosts, the following
8618 hosts (not currently being processed) were also being discarded. This no
8619 longer happens. I'm not sure if this situation could ever has previously
8622 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8625 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8626 header. This is something that is recommended in a new Internet Draft, and
8627 is something that is documented as being done by Sendmail. There are two
8628 possible values. For messages generated by the autoreply transport, Exim
8631 Auto-Submitted: auto-replied
8633 whereas for all other generated messages (e.g. bounces) it adds
8635 Auto-Submitted: auto-generated
8637 63. The "personal" condition in filters now includes a test for the
8638 Auto-Submitted: header. If it contains the string "auto-" the message it
8639 not considered personal.
8641 64. Added rcpt_include_affixes as a generic transport option.
8643 65. Added queue_only_override (default true).
8645 66. Added the syslog_duplication option.
8647 67. If what should have been the first header line of a message consisted of
8648 a space followed by a colon, Exim was mis-interpreting it as a header line.
8649 It isn't of course - it is syntactically invalid and should therefore be
8650 treated as the start of the message body. The misbehaviour could have
8651 caused a number of strange effects, including loss of data in subsequent
8652 header lines, and spool format errors.
8654 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8655 client host had authenticated. This control can now be exercised by an ACL
8656 for more flexibility.
8658 69. By default, callouts do not happen when testing with -bh. There is now a
8659 variant, -bhc, which does actually run the callout code, including
8660 consulting and updating the callout cache.
8662 70. Added support for saslauthd authentication, courtesy of Alexander
8665 71. If statvfs() failed on the spool or log directories while checking their
8666 size for availability, Exim confusingly gave the error "space shortage".
8667 Furthermore, in debugging mode it crashed with a floating point exception.
8668 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8669 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8670 serious problem, Exim now writes to the main and panic logs when this
8671 happens, with details of the failure. It then refuses to accept the
8672 incoming message, giving the message "spool directory problem" or "log
8673 directory problem" with a 421 code for SMTP messages.
8675 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8676 0, 1, and 2 exist, because some OS complain for execs without them (see
8677 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8678 descriptors. However, the code omitted to check that the open succeeded,
8679 causing mysterious errors if for some reason the permissions on /dev/null
8680 got screwed. Now Exim writes a message to the main and panic logs, and
8681 bombs out if it can't open /dev/null.
8683 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8684 interact so that it is all more flexible. It is supposed to remain
8685 backwards compatible. Also added extra_local_interfaces.
8687 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8688 to bomb out with an assertion failure - to the client this appears as a
8689 connection drop. This problem occurs in the part of the code that was taken
8690 from the Samba project. Fortunately, the assertion is in a very simple
8691 function, so I have fixed this by reproducing the function inline in the
8692 one place where it is called, and arranging for authentication to fail
8693 instead of killing the process with assert().
8695 75. The SPA client code was not working when the server requested OEM rather
8696 than Unicode encoding.
8698 76. Added code to make require_files with a specific uid setting more usable in
8699 the case where statting the file as root fails - usually a non-root-mounted
8700 NFS file system. When this happens and the failure is EACCES, Exim now
8701 forks a subprocess and does the per-uid checking as the relevant uid.
8703 77. Added process_log_path.
8705 78. If log_file_path was not explicitly set, a setting of check_log_space or
8706 check_log_inodes was ignored.
8708 79. If a space check for the spool or log partitions fails, the incident is now
8709 logged. Of course, in the latter case the data may get lost...
8711 80. Added the %p formatting code to string_format() so that it can be used to
8712 print addresses in debug_print(). Adjusted all the address printing in the
8713 debugging in store.c to use %p rather than %d.
8715 81. There was a concern that a line of code in smtp_in.c could overflow a
8716 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8717 initially expressed, the concern was not well-founded, because trailing
8718 spaces are removed early. However, if the trailing spaces were followed by
8719 a NULL, they did not get removed, so the overflow was possible. Two fixes
8722 (a) I re-wrote the offending code in a cleaner fashion.
8723 (b) If an incoming SMTP command contains a NULL character, it is rejected
8726 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8727 runs initgroups(), so that if the Exim user is in any additional groups,
8728 they will be used during message reception.
8734 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob