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.
65 JH/01 Support list of dkim results in the dkim_status ACL condition, making
66 it more usable in the data ACL.
68 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
69 Previously This was only logged, on the assumption that errors would be
70 seen for a previous fflush(). However, a fuse filesystem has been
71 reported as showing this an error for the fclose(). The spool is now in
72 an uncertain state, and we have logged and responded acceptance. Change
73 this to respond with a temp-reject, wipe spoolfiles, and log the error
76 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
77 during a recipient verify callout, a QUIT command was attempted on the
78 now-closed callout channel, causing a paniclog entry.
80 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
81 a connection_reject log_selector, under tls_on_connect. Previously
82 with this combination, when the connect ACL rejected, a spurious
83 paniclog entry was made.
85 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
86 of loadbalancer-detection for resumption, in 4.96 - which tries to
87 use the EHLO response. SMTPS does not have one at the time it is starting
88 TLS. Change the default for the smtp transport host_name_extract option
89 to be a static string, for TLS-on-connect cases; meaning that resumption
90 will always be attempted (unless deliberately overriden).
92 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
93 chunk-separator specification. This was broken by hardening introduced
96 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
97 included the -H with the id; this also messed up exiqgrep.
99 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
100 was not properly skipped and empty elements would cause mis-parsing.
101 Tighten parsing of DKIM header records. Previously, all but lowercase
102 alpha chars would be ignored in potential tag names.
104 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
105 being searched. Previously we only had one for IPv4 addresses. Per the
106 documentation, the error results by default in a no-match result for the
107 list. It is logged if the unknown_in_list log_selector is used.
109 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
110 the routing operation. Previously it would silently stop routing the
113 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
114 info-request event close in time to a scheduled run timer could result in
115 the latter being missed, and no further queue scheduled runs being
116 initiated. This ouwld be more likely on high-load systems.
118 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
119 LF-only mode (as detected from the first header line). Previously we did
120 accept that in (normal) CRLF mode; this has been raised as a possible
121 attack scenario (under the name "smtp smuggling").
123 JH/13 Add an fdatasync call for the received message data file in spool, before
124 loggging reception and sending the SMTP ack. Previously we only flushed
125 the stdio buffer so there was still the possibility of a disk error.
127 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
128 address. Previously, for the last address in a header line (commonly
129 there is only one) the terminating newline was part of the logged
132 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
133 header, when parsing for address-qualification. Previously one was only
134 written if there were rewrite rules.
136 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
139 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
140 the multiple-queue-runners facility for 4.97 broke this, giving only a
141 one-time run of the queue.
143 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
146 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
147 TLS session resulted in a forced-fail, a misleading error was logged for
148 the expansino of tls_certificates. This would affect the common case of
149 that option being set (main-section options) but not having any variable
150 parts. It could also potentially affect tls_privatekeys. The underlyding
151 coding errors go back to 4.90 but were only exposed in 4.97.
153 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
154 pcre2 library starting allocating 20kB rather than 112 bytes per match
155 call, which broke the 2GB total limitation on Exim's memory management
156 when a user had over 104207 messages stored and the appendfile
157 maildir_quota_directory_regex option is in use. Release the allocated
158 memory every thosand files to avoid this.
159 The same issue arises with the ACL regex condition, which is applied
160 to every line of a received message.
162 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
163 which all recipients had been handled (itself an issue) a null-pointer
164 deref was done on trying to write a retry record. Fix that by counting
165 the outstanding recipients before trying to transmit the message.
166 The situation arose for a second MX try within a transport run, when the
167 first had perm-rejected a recipient (the only one for the connection, in
168 the case seen) during pipelining, and then closed the TCP connection.
169 The transport classified that as an I/O error, leaving the message
170 outstanding but having marked up the recipient as dealt-with. It then
171 tried another MX because of the I/O error. Fix this by converting the
172 message-level status to ok if there was a close but all recipients were
173 dealt with. Thanks to Wolfgand Breyha for debug runs.
175 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
176 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
178 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
180 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
181 option specified a fixed address, later rewriting on that address would
182 trip on the configuration data being readonly. Instead of modifying
183 in-place, copy data. Found and fixed by Peter Benie.
185 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
186 data a null pointer was followed. Find and testcase by Sebastian Bugge.
188 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
189 decimal 127 chars were not encoded, and lowercase hex was used for
190 encoded values. Outstanding since at least 1999.
192 JH/27 Fix crash in logging. When a message with a large number of recipients
193 had been received, and logging of recipients is enabled, the buffer used
194 for logging could reach limit. A read using a null pointer would then
195 be done, resulting in a crash of the receiving process before an SMTP
196 ACK for the message was returned to the sending system. Duplicate
197 messages were created as a result.
198 Find and debug help by Mateusz Krawczyk
200 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
201 DB, wrapping transport record bare-ip "host names" and ipv6
202 "host addresses" in square-brackets. This makes the parsing that
203 exinext does more reliable.
205 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
208 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
210 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
211 ipv6 addresses for the sender. Previously the uncompressed form was used,
212 and if used in textual form this would result in behavior difference
215 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
216 now classed as a protocol error and subject to smtp_max_synprot_errors.
218 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
219 ".." and has following characters.
221 JH/34 Fix delivery ordering for 2-phase queue run combined with
224 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
225 Previously the $mime_filename variable would have an incorrect value.
226 While in the code, extend coverage to name= which previously was only
227 supported for single parameters, despite also filling in $mime_filename.
233 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
234 SMTP connection" log lines.
236 JH/02 Option default value updates:
237 - queue_fast_ramp (main) true (was false)
238 - remote_max_parallel (main) 4 (was 2)
240 JH/03 Cache static regex pattern compilations, for use by ACLs.
242 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
243 Make the rewrite never match and keep the logging. Trust the
244 admin to be using verify=header-syntax (to actually reject the message).
246 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
247 (under Linux) we watch the dir containing the final file; previously
248 it would be the dir with the first symlink. We still do not monitor
251 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
252 dn_expand() is happy to pass them through.
254 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
255 the file with the proof had an unchanged name, the new proof(s) were
256 loaded on top of the old ones (and nover used; the old ones were stapled).
258 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
259 more than one message arrived in a single connection a reference from
260 the earlier message could be re-used. Often a sigsegv resulted.
261 These variables were introduced in Exim 4.87.
262 Debug help from Graeme Fowler.
264 JH/09 Fix ${filter } for conditions that modify $value. Previously the
265 modified version would be used in construction the result, and a memory
268 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
269 Find and fix by Jasen Betts.
271 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
272 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
273 the systemwide configuration to override the Exim config.
275 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
276 API changes in libopendmarc.
278 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
279 pid 1, in the normal "background daemon" mode, having to drop process-
280 group leadership also lost track of needing to create listener sockets.
282 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
283 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
285 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
286 a capture group which obtained no text (eg. "(abc)*" matching zero
287 occurrences) could cause a segfault if the corresponding $<n> was
290 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
291 included a close-brace character (eg. it itself used an expansion) an
294 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
295 starting TLS. Previously it was after, meaning that attackers on such
296 ports had to be screened using the host_reject_connection main config
297 option. The new sequence aligns better with the STARTTLS behaviour, and
298 permits defences against crypto-processing load attacks, even though it
299 is strictly an incompatible change.
300 Also, avoid sending any SMTP fail response for either the connect ACL
301 or host_reject_connection, for TLS-on-connect ports.
303 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
304 Previously this was not permitted, but it makes reasonable sense.
305 While there, restore a restriction on using it from a connect ACL; given
306 the change JH/16 it could only return false (and before 4.91 was not
309 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
310 was exactly sized compared to the log buffer, a crash occurred with the
311 misleading message "bad memory reference; pool not found".
312 Found and traced by Jasen Betts.
314 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
315 dns_again_means_nonexist included an element causing a DNS lookup which
316 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
317 included (though probably not limited to) a process crash from stack
318 memory limit, or from excessive open files. Replace this with a paniclog
319 whine (as this is likely a configuration error), and returning
322 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
323 this always failed, probably leading to the usual downgrade to in-clear
326 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
327 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
328 to not checking that list for these lookups.
330 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
333 JH/23 Fix crash in string expansions. Previously, if an empty variable was
334 immediately followed by an expansion operator, a null-indirection read
335 was done, killing the process.
337 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
338 include an SMTP response string which is longer than that supported
339 by the delivering transport. Alleviate by wrapping such lines before
342 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
343 chars (RFC limit). Previously a limit of 12 items was made, which with
344 a not-impossible References: in the message being bounced could still
345 be over-large and get stopped in the transport.
347 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
348 close. Previously a bare socket close was done.
350 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
353 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
354 message being considered for delivery was already being handled by
355 another process, and having an SMTP connection already open, the function
356 to close it tried to use an uninitialized variable. This would afftect
357 high-volume sites more, especially when running mailing-list-style loads.
358 Pollution of logs was the major effect, as the other process delivered
359 the message. Found and partly investigated by Graeme Fowler.
361 JH/29 Change format of the internal ID used for message identification. The old
362 version only supported 31 bits for a PID element; the new 64 (on systems
363 which can use Base-62 encoding, which is all currently supported ones
364 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
365 and must use Base-36). The new ID is 23 characters rather than 16, and is
366 visible in various places - notably logs, message headers, and spool file
367 names. Various of the ancillary utilities also have to know the format.
368 As well as the expanded PID portion, the sub-second part of the time
369 recorded in the ID is expanded to support finer precision. Theoretically
370 this permits a receive rate from a single comms channel of better than the
372 The major timestamp part of the ID is not changed; at 6 characters it is
373 usable until about year 3700.
374 Updating from previously releases is fully supported: old-format spool
375 files are still usable, and the utilities support both formats. New
376 message will use the new format. The one hints-DB file type which uses
377 message-IDs (the transport wait- DB) will be discarded if an old-format ID
378 is seen; new ones will be built with only new-format IDs.
379 Optionally, a utility can be used to convert spool files from old to new,
380 but this is only an efficiency measure not a requirement for operation
381 Downgrading from new to old requires running a provided utility, having
382 first stopped all operations. This will convert any spool files from new
383 back to old (losing time-precision and PID information) and remove any
384 wait- hints databases.
386 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
387 we treated them as item separators when parsing for a list item, but they
388 need to be protected by the doublequotes. While there, add handling for
391 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
392 Found and fixed by Jasen Betts. No testcase for this as my usual text
393 editor insists on emitting only valid UTF-8.
395 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
396 a null-indirection SIGSEGV for the receive process.
398 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
399 -bh use. Internal checking would spot this and take a panic.
401 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
402 In 4.96 this would expand to empty.
404 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
405 certificate. Find and fix by Andreas Metzler.
407 JH/36 Add ARC info to DMARC hostory records.
409 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
410 or fakedefer. Previously the sender could discover that the message
411 had in fact been accepted.
413 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
414 sequences. Previously the input was not noted as being tainted; notably
415 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
416 bad coding of authenticators.
418 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
419 and ${tr...}. Found and diagnosed by Heiko Schlichting.
421 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
422 could be triggered by externally-supplied input. Found by Trend Micro.
425 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
426 be triggered by externally-controlled input. Found by Trend Micro.
429 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
430 be triggered by externally-controlled input. Found by Trend Micro.
433 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
434 Make the rewrite never match and keep the logging. Trust the
435 admin to be using verify=header-syntax (to actually reject the message).
437 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
440 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
446 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
447 after reception to before a subsequent reception. This should
448 mean slightly faster delivery, and also confirmation of reception
451 JH/02 Move from using the pcre library to pcre2. The former is no longer
452 being developed or supported (by the original developer).
454 JH/03 Constification work in the filters module required a major version
455 bump for the local-scan API. Specifically, the "headers_charset"
456 global which is visible via the API is now const and may therefore
457 not be modified by local-scan code.
459 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
460 sendfile() didi not account for the way the ClamAV driver code called it.
462 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
463 time check was being done for every character; replace that with one
466 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
467 sent was prefixed with a length byte.
469 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
470 RFC 5321. Previously Dovecot (at least) would log errors during
473 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
474 in 4.61 without a reason logged. Binaries will be bigger, which might
475 matter on diskspace-constrained systems, but debug is easier.
477 JH/09 Fix macro-definition during "-be" expansion testing. The move to
478 write-protected store for macros had not accounted for these runtime
479 additions; fix by removing this protection for "-be" mode.
481 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
482 handing out large-numbered file descriptors, violating the usual Unix
483 assumption (and required by Posix) that the lowest possible number will be
484 allocated by the kernel when a new one is needed. In the daemon, and any
485 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
486 are not useable for FD_SET() [and hence select()] and overwrite the stack.
487 Assorted crashes happen.
489 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
490 main-section options or in a connect ACL, the value from the first ever
491 connection was never replaced for subsequent connections. Found by
494 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
495 though only once PCRE2 was introduced: the memory accounting used under
496 debug offset allocations by an int, giving a hard trap in early startup.
497 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
499 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
500 with underbars is given. The write-protection of configuration introduced
501 in 4.95 trapped when normalisation was applied to an option not needing
504 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
506 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
507 failing to close the certificates directory, every hour or any time it
510 JH/16 Debugging initiated by an ACL control now continues through into routing
511 and transport processes. Previously debugging stopped any time Exim
512 re-execs, or for processing a queued message.
514 JH/17 The "expand" debug selector now gives more detail, specifically on the
515 result of expansion operators and items.
517 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
518 bad comparison between the option value and the name of the file to
519 be included was done, and a mismatch was wrongly identified.
520 4.88 to 4.95 are affected.
522 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
524 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
525 supplied as the db file-pair basename. Previously, if a directory
526 path was given, for example via the autoreply "once" option, the DB
527 file.pag and file.dir files would be created in that directory's
530 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
531 "taint" log_selector. These were previously deprecated.
533 JH/22 Fix static address-list lookups to properly return the matched item.
534 Previously only the domain part was returned.
536 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
537 the call into OpenSSL to send a TLS Close was being repeated; this
538 resulted in the library waiting for the peer's Close. If that was never
539 sent we waited forever. Fix by tracking send calls.
541 JH/24 The ${run} expansion item now expands its command string elements after
542 splitting. Previously it was before; the new ordering makes handling
543 zero-length arguments simpler. The old ordering can be obtained by
544 appending a new option "preexpand", after a comma, to the "run".
546 JH/25 Taint-check exec arguments for transport-initiated external processes.
547 Previously, tainted values could be used. This affects "pipe", "lmtp" and
548 "queryprogram" transport, transport-filter, and ETRN commands.
549 The ${run} expansion is also affected: in "preexpand" mode no part of
550 the command line may be tainted, in default mode the executable name
553 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
554 the the facility was not passed across execs, and only the first message
555 passed over a connection could use BDAT; any further ones using DATA.
557 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
558 uses $sending_ip_address and an interface is specified.
559 Previously any use of the local address in the EHLO name disabled
560 PIPECONNECT, the common case being to use the rDNS of it.
562 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
563 resumption. Previously verify failed because no certificate status is
564 passed on the wire for the restarted session. Fix by using the recorded
565 ocsp status of the stored session for the new connection.
567 JH/29 TLS resumption: the key for session lookup in the client now includes
568 more info that a server could potentially use in configuring a TLS
569 session, avoiding oferring mismatching sessions to such a server.
570 Previously only the server IP was used.
572 JH/30 Fix string_copyn() for limit greater than actual string length.
573 Previously the copied amount was the limit, which could result in a
574 overlapping memcpy for newly allocated destination soon after a
575 source string shorter than the limit. Found/investigated by KM.
577 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
578 close; it may be needed for a subsequent connection. This caused a
579 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
581 JH/32 Fix CHUNKING for a second message on a connection when the first was
582 rejected. Previously we did not reset the chunking-offered state, and
583 erroneously rejected the BDAT command. Investigation help from
586 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
587 an empty address. Previously the expansion returned an error.
589 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
590 proxy. Previously these were misparsed, leading to paniclog entries.
596 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
597 related applications. Previously an "H" was used where available info
598 says that "M" should be, so change to match.
600 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
601 as arguments, so an implementation trying to copy these into a local
602 buffer was taking a taint-enforcement trap. Fix by using dynamically
603 created buffers. Similar fix for radius expansion condition.
605 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
606 reasonable, eg. to count headers. Fix by using dynamically created
607 buffers rather than a local. Do similar fixes for ACL actions "dcc",
608 "log_reject_target", "malware" and "spam"; the arguments are expanded
609 so could be handling tainted values.
611 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
612 broken the (no-op) support for this sendmail command. Restore it
613 to doing nothing, silently, and returning good status.
615 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
616 record path was given (or the default used) without a leading directory
617 path, an error occurred on trying to open it. Use the transport's working
620 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
621 transport. Previously it was the name on the DNS A-record; use instead
622 the head of the CNAME chain leading there (if there is one). This seems
623 to align better with RFC 6125.
625 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
626 smtp_accept_max_per_host allocated resources which were not released
627 when the limit was exceeded. This eventually crashed the daemon. Fix
628 by adding a release action in that path.
630 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
631 expanded; previously using tainted values was rejected. Fix by using
632 dynamically-created buffers.
634 JH/09 Relax restrictions on ACL verify condition needing access to message
635 headers. Previously they were only permitted in data and non-smtp ACLs;
636 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
637 not_blind, header_sender and header_names_ascii verification.
639 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
640 Previously a macro used one argument twice; when called with the
641 argument as an expression having side-effects, incorrect operation
642 resulted. Use an inlineable function.
644 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
645 held open for a verify callout. Previously this wan not accounted for
646 and a corrupt onward SMTP conversation resulted.
648 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
649 Previously they were embedded naively in the constructed address; when
650 needed, strip the quoting and quote the entire local_part.
651 Also make the inbound_srs expansion condition handle quoting.
653 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
654 excluded, not matching the documentation.
656 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
657 was given for the sqlite_dbfile a trap resulted.
659 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
660 "name" argument resulted in a trap. There is no reason to disallow such;
661 this was a coding error.
663 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
664 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
665 spent suspended, ignoring the POSIX definition. Previously we assumed
666 it did and a constant offset from real time could be used as a correction.
667 Change to using the same clock source for the start-of-message and the
668 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
669 exists, just to get a clock slightly more aligned to reality.
671 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
672 RFC says it is optional some validators care. The missing char was not
673 intended but triggered by a line-wrap alignment. Discovery and fix by
674 Guillaume Outters, hacked on by JH.
676 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
677 name being quoted was tainted a trap would be taken. Fix by using
678 dynamically created buffers. The routine could have been called by a
679 rewrite with the "h" flag, by using the "-F" command-line option, or
680 by using a "name=" option on a control=submission ACL modifier.
682 JH/19 SPF: change the Authentication-Results expansion component to give
683 smtp.helo when the sender domain is empty. Previously it gave
686 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
687 not in 127.0.0.0/8 to help in spotting list domains taken over by a
688 domain-parking registrar.
690 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
691 Previously when a whitespace character was specified it was not inserted
692 after removing the newline.
694 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
695 the domain part of the recipient address. This overrides any tls_sni
696 option set, which was previously used.
698 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
701 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
702 is_tainted() had an off-by-one error in the overenthusiastic direction.
703 Find and fix by Gavan. Although NetBSD is not a supported platform for
704 4.94 this bug could affect other platforms.
706 PP/01 Fix default prime selection to be consistent.
707 One path used ike23 still, instead of exim.dev.20160529.3; now both
708 execution flows will use the same DH primes (currently
709 exim.dev.20160529.3).
711 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
712 option in smtp transport, to match the documentation. Previously
713 verification was not being done in some cases where it should have been.
715 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
716 than one server was defined and depending on the platform memory layout
717 details, an internal consistency trap could be hit while walking the list
720 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
721 files. The value is used by the authresults expansion item. Previously
722 if this was used in a router or transport, a crash could result.
724 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
725 have a sufficient incidence of EINTR returns from select that an
726 interaction with other operations done by the main daemon loop exposed
727 a bug in the error-handling. This was benign apart from the log
730 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
731 for consistency with delivered "=>" and failed "**" lines. While we're
732 there, handle PRX and TFO.
734 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
735 applied. This resulted, if any header-line rewrite rules were configured,
736 in a panic-log triggerable by sending a message with a long address in
737 a header. Fix by increasing the arbitrary limit to larger than a single
738 (dewrapped) 5322 header line maximum size.
740 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
741 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
742 RFC 6648 which deprecates X- options in protocols as a general practice.
743 Changeover between the implementations is handled by the mechanisms
746 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
747 a remote which uses callout/hold. Previously the local was queued.
749 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
752 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
753 log line. The asterisk is now consistently appended to the remote IP
754 (and port, if given), and will also be provided on defer and fail log
755 lines. Previously it could be placed on the local IP if that was being
756 logged, and was only provided on delivery lines.
758 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
760 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
761 authenticator client_send option. Previously the next char, after a pair
762 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
763 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
764 documentation. There is still no way to get a leading ^ immediately
765 after a NUL (ie. for the password of a PLAIN method authenticator.
767 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
768 files. For bad sizes read, delete the record and whine to paniclog.
770 JH/38 When logging an AUTH failure, as server, do not include sensitive
771 information. Previously, the credentials would be included if given
772 as part of the AUTH command line and an ACL denied authentication.
774 JH/39 Bug 2691: fix $local_part_data. When the matching list element
775 referred to a file, bad data was returned. This likely also affected
778 JH/40 The gsasl authenticator now supports caching of the salted password
779 generated by the client-side implementation. This required the addition
780 of a new variable: $auth4.
782 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
783 left undeleted; the attempt to re-create it then failed - resulting in
784 the usual "SIGHUP tp have daemon reload configuration" to not work.
785 This affected any platform not supporting "abstract" Unix-domain
786 sockets (i.e. not Linux).
788 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
789 recipients" response to RCPT in a later response, with a 250. The
790 previous coding assumed this would not happen, and under PIPELINING
791 would result in both lost and duplicate recipients for a message.
793 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
794 Previously the weighting was incorrectly applied. Similar fix for socks
795 proxies. Found and fixed by Heiko Schlichting.
797 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
798 not handle sub-lists included using the +namedlist syntax. While
799 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
800 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
803 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
804 Previously the permanent pool was used, so the store could not be freed.
805 This meant a connection with many messages would use continually-growing
808 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
809 per-pool so as not to waste too much space. Previously a constant size
810 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
811 DOS attacks harder. The cost is wasted memory use in the larger blocks.
813 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
814 same space repeatedly, and a smaller process footprint.
816 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
817 for GnuTLS. Previously the name started "%s" which, while not a bug,
818 looked as if if might be one.
820 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
821 "continued connection") make the $proxy_* variables available. Previously
822 the information was not passed across the exec() call for subsequent
823 transport executions. This also mean that the log lines for the
824 messages can show the proxy information.
826 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
827 receive time. With modern systems the difference is significant.
828 The historical behaviour can be restored by disabling (a new) log_selector
829 "queue_time_exclusive".
831 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
832 content) were specifically tested for. Now, also cover expansions
833 resulting in ACL names and inline ACL content.
835 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
836 making it unusable in complex expressions.
838 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
839 fail with a taint-check on the spoolfile name, and leave the message
842 HS/01 Enforce absolute PID file path name.
844 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
846 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
848 PP/02 Bug 2643: Correct TLS DH constants.
849 A missing NUL termination in our code-generation tool had led to some
850 incorrect Diffie-Hellman constants in the Exim source.
851 Reported by kylon94, code-gen tool fix by Simon Arlott.
853 PP/03 Impose security length checks on various command-line options.
854 Fixes CVE-2020-SPRSS reported by Qualys.
856 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
857 better. Reported by Qualys.
859 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
860 providing a particularly obnoxious sender full name.
863 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
865 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
868 PP/08 Change default for recipients_max from unlimited to 50,000.
870 PP/09 Fix security issue with too many recipients on a message (to remove a
871 known security problem if someone does set recipients_max to unlimited,
872 or if local additions add to the recipient list).
873 Fixes CVE-2020-RCPTL reported by Qualys.
875 PP/10 Fix security issue in SMTP verb option parsing
876 Fixes CVE-2020-EXOPT reported by Qualys.
878 PP/11 Fix security issue in BDAT state confusion.
879 Ensure we reset known-good where we know we need to not be reading BDAT
880 data, as a general case fix, and move the places where we switch to BDAT
881 mode until after various protocol state checks.
882 Fixes CVE-2020-BDATA reported by Qualys.
884 HS/03 Die on "/../" in msglog file names
886 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
887 the Exim runtime user are allowed to create files.
889 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
892 QS/03 When reading the output from interpreted forward files we do not
893 pass the pipe between the parent and the interpreting process to
894 executed child processes (if any).
896 QS/04 Always die if requested from internal logging, even is logging is
899 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
900 the API; compilation noo longer completes with DMARC support included.
901 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
902 been reported on other platforms.
904 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
906 JH/56 Make the majority of info read from config files readonly, for defence-in-
907 depth against exploits. Suggestion by Qualys.
908 Not supported on Solaris 10.
910 JH/57 Fix control=fakreject for a custom message containing tainted data.
911 Previously this resulted in a log complaint, due to a re-expansion present
912 since fakereject was originally introduced.
914 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
915 modifier was given, a loop resulted.
917 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
918 pipelined SMTP command followed the BDAT LAST then it would be
919 incorrectly treated as part of the message body, causing a verification
922 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
923 require looser validation rules than those for 821-level addresses,
924 which only permit IP addresses.
930 JH/01 Avoid costly startup code when not strictly needed. This reduces time
931 for some exim process initialisations. It does mean that the logging
932 of TLS configuration problems is only done for the daemon startup.
934 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
936 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
937 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
940 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
941 DKIM signing is being done. Previously a transport_filter would always
942 disable CHUNKING, falling back to traditional DATA.
944 JH/05 Regard command-line recipients as tainted.
946 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
948 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
949 PAM library frees one of the arguments given to it, despite the
950 documentation. Therefore a plain malloc must be used.
952 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
953 on-stack buffers were used, resulting in a taint trap when DSN information
954 copied from a received message was written into the buffer.
956 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
957 the ordering of its ARC headers. This caused a crash.
959 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
960 a new record was being constructed with information from the peer, a trap
963 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
964 installation would get error messages from DMARC verify, when it hit the
965 nonexistent file indicated by the default. Distros wanting DMARC enabled
966 should both provide the file and set the option.
967 Also enforce no DMARC verification for command-line sourced messages.
969 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
970 could, depending on the platform, hang at the STARTTLS response.
972 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
973 message on a connection. Previously if one message had ARC headers and
974 the following one did not, a crash could result when adding an
975 Authentication-Results: header.
977 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
978 Exim main code and Exim-related utities. The introduction of taint
979 tracking also did many adjustments to string handling. Since then, eximon
980 frequently terminated with an assert failure.
982 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
983 check for 452 responses. This slightly helps the inefficieny of doing
984 a large alias-expansion into a recipient-limited target. The max_rcpt
985 transport option still applies (and at the current default, will override
986 the new feature). The check is done for either cause of synch, and forces
987 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
988 connection. The new facility is not tunable at this time.
990 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
991 library live data was being used, so the results became garbage. Make
992 copies while it is still usable.
994 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
995 on delivery deferred (==) and failed (**) lines (if a delivery was
996 attemtped). Previously it was only on completion (=>) lines.
998 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
999 for the expansion of the server_scram_iter and server_scram_salt options.
1001 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
1002 are now specifically given a NO_DATA response without hitting the system
1003 resolver. The library goes on to do the now-standard TXT lookup.
1004 Use of dnsdb lookups is not affected.
1006 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
1007 only retrieve the errormessage once. Previously two calls to dlerror()
1008 were used, and the second one (for mainlog/paniclog) retrieved null
1011 JH/20 Taint checking: disallow use of tainted data for
1012 - the appendfile transport file and directory options
1013 - the pipe transport command
1014 - the autoreply transport file, log and once options
1015 - file names used by the redirect router (including filter files)
1017 - paths used by single-key lookups
1018 Previously this was permitted.
1020 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
1021 adjusted the size of a major service buffer; this failed because the
1022 buffer was in use at the time. Change to a compile-time increase in the
1023 buffer size, when this authenticator is compiled into exim.
1025 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
1026 previous fast-mode was untenable in the face of glibs using mmap to
1027 support larger malloc requests.
1029 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
1030 New values supported, if defined on system where compiled:
1031 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
1032 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
1034 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
1035 running a limited number of proceses in parallel, a benefit is gained. The
1036 amount varies with the platform hardware and load. The use of the option
1037 queue_run_in_order means we cannot do this, as ordering becomes
1040 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1041 had introduced a string-copy (for ensuring NUL-termination) which was not
1042 appropriate for that case, which can include embedded NUL bytes in the
1043 block of data. Investigation showed the copy to actually be needless, the
1044 data being length-specified.
1046 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1047 done during a receiving connection, and both used TLS, global info was
1048 used rather than per-connection info for tracking the state of data
1049 queued for transmission. This could result in a connection hang.
1051 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1052 Previously, when delivering serveral messages down a single connection
1053 only the first would provide a SIZE. This was due to the size information
1054 not being properly tracked.
1056 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1057 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1058 expansion and logging. Previously, spurious values such as a future
1059 minute could be seen.
1061 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1062 it could crash from a null-deref. This could also affect the
1063 ${addresses: } operator and ${readsock } item.
1065 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1066 message following a mime one, the variable was not reset.
1068 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1069 cached capability (perhaps the peer reneged?) and immediately retry in
1072 JH/31 Fix spurious detection of timeout while writing to transport filter.
1074 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1075 an attempt to copy the string was made before checking it.
1077 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1078 taint of the lookup key was maintained; we now regard the presence in the
1079 filesystem as sufficient validation.
1081 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1082 argument is supplied.
1084 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1085 Previously this was not checked, and nonempty relative paths made an
1086 access under Exim's current working directory.
1088 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1089 Previously no event was raised.
1091 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1092 parameter supplied by the sender MAIL FROM command. Previously it was
1093 ignored, and only the check_spool_space option value for the required
1096 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1097 the size of the signing public-key. Previously it was instead giving
1098 the size of the signature hash.
1100 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1101 the default. See the (new) dkim_verify_min_keysizes option.
1103 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1104 and an ACL use a lookup for checking either the local_part or domain,
1105 stale data could be accessed. Ensure that variable references are
1106 dropped between messages.
1108 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1109 by the client was not checked as pointing within response data before
1110 being used. A malicious client could thus cause an out-of-bounds read and
1111 possibly gain authentication. Fix by adding the check.
1113 JH/42 Internationalisation: change the default for downconversion in the smtp
1114 transport to be "if needed". Previously it was "as previously set" for
1115 the message, which usually meant "if needed" for message-submission but
1116 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1117 even when the envelope addresses did not need it, resulting in forwarding
1118 failures to non-supporting MTAs. A downconvert in such cases will be
1119 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1120 transport. The change does mean that addresses needing conversion will
1121 be converted when previously a delivery failure would occur.
1123 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1124 response was received it would be used unchecked in a fail-DSN, violating
1125 standards on line-length limits. Truncate if needed.
1127 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1128 doesn't work. (Additionally add a new main config option to configure the
1135 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1136 side, to decode a TLS 1.3 packet capture.
1138 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1139 Previously the default library behaviour applied, sending two, each in
1140 its own TCP segment.
1142 JH/03 Debug output for ACL now gives the config file name and line number for
1145 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1147 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1149 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1150 buffer overrun for (non-chunking) other transports.
1152 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1153 TLS1.3, means that a server rejecting a client certificate is not visible
1154 to the client until the first read of encrypted data (typically the
1155 response to EHLO). Add detection for that case and treat it as a failed
1156 TLS connection attempt, so that the normal retry-in-clear can work (if
1157 suitably configured).
1159 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1160 and/or domain. Found and fixed by Jason Betts.
1162 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1163 configuration). If a CNAME target was not a wellformed name pattern, a
1166 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1167 the OS reports them interleaved with other addresses.
1169 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1170 used both for input and for a verify callout, both encrypted, SMTP
1171 responses being sent by the server could be lost. This resulted in
1172 dropped connections and sometimes bounces generated by a peer sending
1175 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1176 string. Previously it was possible to cause undefined behaviour in a
1177 library routine (usually a crash). Found by "zerons".
1179 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1182 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1183 API was removed, so update to use the newer ones.
1185 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1186 any timeout set, is taking a long time. Previously we would hang on to a
1187 rotated logfile "forever" if the input was arriving with long gaps
1188 (a previous attempt to fix addressed lack, for a long time, of initial
1191 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1192 shared (NFS) environment. The length of the tempfile name is now
1193 4 + 16 ("hdr.$message_exim_id") which might break on file
1194 systems which restrict the file name length to lower values.
1195 (It was "hdr.$pid".)
1197 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1198 shared (NFS) environment.
1200 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1201 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1204 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1205 on some platforms for bit 31.
1207 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1208 to changes apparently associated with TLS1.3 handling some of the APIs
1209 previously used were either nonfunctional or inappropriate. Strings
1210 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1211 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1212 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1213 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1214 and the use of specific cipher names in the encrypted= ACL condition.
1216 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1218 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1219 verification result was not updated unless hosts_require_ocsp applied.
1221 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1222 queue_list_requires_admin set to false, non-admin users were denied the
1225 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1226 directory-of-certs mode. Previously they were advertised despite the
1229 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1230 A single TCP connection by a client will now hold a TLS connection open
1231 for multiple message deliveries, by default. Previously the default was to
1234 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1235 default. If built with the facility, DANE will be used. The facility
1236 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1238 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1239 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1240 must be defined and you must still, unless you define DISABLE_TLS, manage
1241 the the include-dir and library-file requirements that go with that
1242 choice. Non-TLS builds are still supported.
1244 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1247 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1248 default. If the platform supports and has the facility enabled, it will
1249 be requested on all coneections.
1251 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1252 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1254 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1256 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1257 success-DSN messages. Previously the From: header was always the default
1258 one for these; the option was ignored.
1260 JH/28 Fix the timeout on smtp response to apply to the whole response.
1261 Previously it was reset for every read, so a teergrubing peer sending
1262 single bytes within the time limit could extend the connection for a
1263 long time. Credit to Qualsys Security Advisory Team for the discovery.
1265 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1266 delivery address, which leaked information of the results of local
1267 forwarding. Change to the original envelope recipient address, per
1270 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1271 requested. Previously not bounce was generated and a log entry of
1272 error ignored was made.
1274 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1276 JH/32 Introduce a general tainting mechanism for values read from the input
1277 channel, and values derived from them. Refuse to expand any tainted
1278 values, to catch one form of exploit.
1280 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1281 was unused and the unexpanded text used for the test. Found and
1282 fixed by Ruben Jenster.
1284 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1285 an attempt to use a TLS library read routine dereffed a nul pointer,
1288 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1289 them in our smtp response.
1291 JH/36 Have the general router option retry_use_local_part default to true when
1292 any of the restrictive preconditions are set (to anything). Previously it
1293 was only for check_local user. The change removes one item of manual
1294 configuration which is required for proper retries when a remote router
1295 handles a subset of addresses for a domain.
1297 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1298 link count into consideration.
1300 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1301 caused the extension of big_buffer, the following lines were ignored.
1303 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1304 accordance with RFC 2308. Previously there was no expiry, so a longlived
1305 receive process (eg. due to ACL delays) versus a short SOA value could
1308 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1310 JH/39 Promote DMARC support to mainline.
1312 JH/40 Bug 2452: Add a References: header to DSNs.
1314 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1315 parameters. The relevant library call is documented as "Deprecated: This
1316 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1317 3.6.0, DH parameters are negotiated following RFC7919."
1319 HS/06 Change the default of dnssec_request_domains to "*"
1321 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1322 carried on and emitted a BDAT command, even when PIPELINING was not
1325 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1326 buffer was used for the filename, resulting in a trap when tainted
1327 arguments (eg. $domain) were used.
1329 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1330 recommended to avoid a possible server-load attack. The feature can be
1331 re-enabled via the openssl_options main cofiguration option.
1333 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1334 for version 4.90 - adding a "more data" boolean to the arguments.
1335 Bumped the ABI version number also, this having been missed previously;
1336 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1337 respect of usage of smtp_printf() by either local_scan code or libraries
1338 accessed via the ${dlfunc } expansion item. Both will need coding
1339 adjustment for any calls to smtp_printf() to match the new function
1340 signature; a FALSE value for the new argument is always safe.
1342 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1343 the file-offset (which the Linux syscall does, and exim expects); this
1344 resulted in an indefinite loop.
1346 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1347 to do ARC verification. The Authentication-Results: header line added
1348 by the configuration then had no ARC item.
1350 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1351 an incorrect mode was used for reading the result, resulting in it being
1358 JH/01 Remove code calling the customisable local_scan function, unless a new
1359 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1361 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1362 non-signal-safe functions being used.
1364 JH/03 Bug 2269: When presented with a received message having a stupidly large
1365 number of DKIM-Signature headers, disable DKIM verification to avoid
1366 a resource-consumption attack. The limit is set at twenty.
1368 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1369 report of oldest_pass in ${authres } in consequence, and separate out
1370 some descriptions of reasons for verification fail.
1372 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1373 files in the spool were present and unlocked. A queue-runner could spot
1374 them, resulting in a duplicate delivery. Fix that by doing the unlock
1375 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1376 add more error-checking on spoolfile handling while that code is being
1379 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1380 No known attacks, no CVE, this is defensive hardening.
1382 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1383 a queue-runner could start a delivery while other operations were ongoing.
1384 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1385 Found and investigated by Tim Stewart. Fix by using the open message data
1386 file handle rather than opening another, and not locally closing it (which
1387 releases a lock) for that case, while creating the temporary .eml format
1388 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1390 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1391 $sender_verify_failure/$recipient_verify_failure to "random".
1393 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1396 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1397 Previously this would segfault.
1399 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1402 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1403 like zero, since the resolver should be doing this for us, But we need one
1404 as a CNAME but no MX presence gets the CNAME returned; we need to check
1405 that doesn't point to an MX to declare it "no MX returned" rather than
1406 "error, loop". A new main option is added so the older capability of
1407 following some limited number of chain links is maintained.
1409 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1411 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1412 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1413 now-deprecated earlier definitions used only specified the range up to TLS
1414 1.2 (in the older-version library docs).
1416 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1418 JH/15 Rework TLS client-side context management. Stop using a global, and
1419 explicitly pass a context around. This enables future use of TLS for
1420 connections to service-daemons (eg. malware scanning) while a client smtp
1421 connection is using TLS; with cutthrough connections this is quite likely.
1423 JH/16 Fix ARC verification to do AS checks in reverse order.
1425 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1427 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1428 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1429 Previously the "utf8" would be re-prepended for every additional message.
1431 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1432 Previously thery were accepted, resulting in issues when attempting to
1433 forward messages to a non-supporting MTA.
1435 PP/02 Let -n work with printing macros too, not just options.
1437 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1438 one parent address was copied, and bogus data was used at delivery-logging
1439 time. Either a crash (after delivery) or bogus log data could result.
1440 Discovery and analysis by Tim Stewart.
1442 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1443 Previously if the string ended mid-character, we did not insert the
1444 promised '?' replacement.
1446 PP/04 Documentation: current string operators work on bytes, not codepoints.
1448 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1449 should pack well giving a smaller memory footprint so better caching and
1450 therefore performance. Group the declarations where this can't be done so
1451 that the byte-sized flag variables are not interspersed among pointer
1452 variables, giving a better chance of good packing by the compiler.
1454 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1455 non-null, to avoid issues with sites running BATV. Previously reports were
1456 sent with an empty envelope sender so looked like bounces.
1458 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1459 The ignore_error flag wasn't being returned from the filter subprocess so
1460 was not set for later routers. Investigation and fix by Matthias Kurz.
1462 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1463 and a msg:complete for the whole, when a message is manually removed using
1464 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1466 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1467 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1468 hope that is portable enough.
1470 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1471 requiring a known-CA anchor certificate; make it now rely entirely on the
1472 TLSA as an anchor. Checking the name on the leaf cert against the name
1473 on the A-record for the host is still done for TA (but not for EE mode).
1475 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1476 included in delivery lines for non-proxied connections, when compiled with
1477 SUPPORT_SOCKS and running with proxy logging enabled.
1479 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1480 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1481 move the existing event to fire before the normal logging of message
1482 failure so that custom logging is bracketed by normal logging.
1484 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1485 msg:fail:internal event. Developement by Matthias Kurz.
1487 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1488 far too small for todays use of crypto signatures stored there. Go all
1489 the way to the max DNS message size of 64kB, even though this might be
1490 overmuch for IOT constrained device use.
1492 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1493 copy a string over itself. The library routine is documented as not
1494 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1496 JH/32 For main options check_spool_space and check_inode_space, where the
1497 platform supports 64b integers, support more than the previous 2^31 kB
1498 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1499 the previous G, M, k.
1501 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1502 $authenticated_fail_id variable on authentication failure. Previously
1505 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1506 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1507 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1508 GNUTLS_SEC_PARAM_MEDIUM.
1510 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1511 side. Previously we would continue as if no SNI had been received.
1513 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1514 "<" character, which should be a list-separator specification, we walked
1515 off past the nul-terimation.
1517 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1518 causes) even when the retry time is not yet met. Previously they were
1519 not, meaning that when (say) an account was over-quota and temp-rejecting,
1520 and multiple senders' messages were queued, only one sender would get
1521 notified on each configured delay_warning cycle.
1523 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1525 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1526 cipher-suites, an error can be left on the stack even for a succeeding
1527 accept; this results in impossible error messages when a later operation
1530 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1531 return error codes indicating retry. Under TLS1.3 this becomes required.
1533 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1534 it only wrote the new authenticators, resulting in a lack of tracking of
1535 peer changes of ESMTP extensions until the next cache flush.
1537 JH/41 Fix the loop reading a message header line to check for integer overflow,
1538 and more-often against header_maxsize. Previously a crafted message could
1539 induce a crash of the recive process; now the message is cleanly rejected.
1541 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1542 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1548 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1549 When redis_servers is set to a list of > 1 element, and the Redis servers
1550 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1551 case of MOVED into a DEFER case instead, thus moving the query onto the
1552 next server in the list. For a cluster of N elements, all N servers must
1553 be defined in redis_servers.
1555 GF/02 Catch and remove uninitialized value warning in exiqsumm
1556 Check for existence of @ARGV before looking at $ARGV[0]
1558 JH/01 Replace the store_release() internal interface with store_newblock(),
1559 which internalises the check required to safely use the old one, plus
1560 the allocate and data copy operations duplicated in both (!) of the
1561 extant use locations.
1563 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1564 modifier. This matches the restriction on the commandline.
1566 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1567 Previously only the last row was returned.
1569 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1570 we assumed that tags in the header were well-formed, and parsed the
1571 element content after inspecting only the first char of the tag.
1572 Assumptions at that stage could crash the receive process on malformed
1575 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1576 While running the DKIM ACL we operate on the Permanent memory pool so that
1577 variables created with "set" persist to the DATA ACL. Also (at any time)
1578 DNS lookups that fail create cache records using the Permanent pool. But
1579 expansions release any allocations made on the current pool - so a dnsdb
1580 lookup expansion done in the DKIM ACL releases the memory used for the
1581 DNS negative-cache, and bad things result. Solution is to switch to the
1582 Main pool for expansions.
1583 While we're in that code, add checks on the DNS cache during store_reset,
1584 active in the testsuite.
1585 Problem spotted, and debugging aided, by Wolfgang Breyha.
1587 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1588 When none of the hosts presented to a transport match an already-open
1589 connection, close it and proceed with the list. Previously we would
1590 queue the message. Spotted by Lena with Yahoo, probably involving
1593 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1594 Previously a spurious "250 OK id=" response was appended to the proper
1597 JH/08 The "support for" informational output now, which built with Content
1598 Scanning support, has a line for the malware scanner interfaces compiled
1599 in. Interface can be individually included or not at build time.
1601 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1602 by the template makefile "src/EDITME". The "STREAM" support for an older
1603 ClamAV interface method is removed.
1605 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1606 rows affected is given instead).
1608 JH/11 The runtime Berkeley DB library version is now additionally output by
1609 "exim -d -bV". Previously only the compile-time version was shown.
1611 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1612 SMTP connection. Previously, when one had more recipients than the
1613 first, an abortive onward connection was made. Move to full support for
1614 multiple onward connections in sequence, handling cutthrough connection
1615 for all multi-message initiating connections.
1617 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1618 routers. Previously, a multi-recipient message would fail to match the
1619 onward-connection opened for the first recipient, and cause its closure.
1621 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1622 a timeout on read on a GnuTLS initiating connection, resulting in the
1623 initiating connection being dropped. This mattered most when the callout
1624 was marked defer_ok. Fix to keep the two timeout-detection methods
1627 JH/15 Relax results from ACL control request to enable cutthrough, in
1628 unsupported situations, from error to silently (except under debug)
1629 ignoring. This covers use with PRDR, frozen messages, queue-only and
1632 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1634 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1635 metadata, resulting in a crash in free().
1637 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1638 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1639 Broken also in d185889f4, with init system revamp.
1641 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1642 Previously we abruptly closed the connection after reading a malware-
1643 found indication; now we go on to read the "scan ok" response line,
1646 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1647 ACL. Previously, a crash would result.
1649 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1650 macro text after a replacement (previously it was only once per line) and
1651 by skipping builtin macros when searching for an uppercase lead character.
1653 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1654 for the build is renamed.
1656 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1657 was allocated for every new TLS startup, meaning one per message. Fix
1658 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1660 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1661 reported the original. Fix to report (as far as possible) the ACL
1662 result replacing the original.
1664 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1665 OpenSSL. Certificate information is loaded for every new TLS startup,
1666 and the resources needed to be freed.
1668 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1670 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1673 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1674 DATA response info to the (existing) per-recipient response info for
1675 the "C=" log element. It can have useful tracking info from the
1676 destination system. Patch from Simon Arlott.
1678 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1679 length value. Previously this would segfault.
1681 HS/02 Support Avast multiline protoocol, this allows passing flags to
1682 newer versions of the scanner.
1684 JH/28 Ensure that variables possibly set during message acceptance are marked
1685 dead before release of memory in the daemon loop. This stops complaints
1686 about them when the debug_store option is enabled. Discovered specifically
1687 for sender_rate_period, but applies to a whole set of variables.
1688 Do the same for the queue-runner and queue-list loops, for variables set
1689 from spool message files. Do the same for the SMTP per-message loop, for
1690 certain variables indirectly set in ACL operations.
1692 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1693 as a multi-recipient message from a mailinglist manager). The coding had
1694 an arbitrary cutoff number of characters while checking for more input;
1695 enforced by writing a NUL into the buffer. This corrupted long / fast
1696 input. The problem was exposed more widely when more pipelineing of SMTP
1697 responses was introduced, and one Exim system was feeding another.
1698 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1699 receiving system, and refused recipients seen by the sending system
1700 (propating to people being dropped from mailing lists).
1701 Discovered and pinpointed by David Carter.
1703 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1704 replaced by the ${authresults } expansion.
1706 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1708 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1709 allows proper process termination in container environments.
1711 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1712 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1714 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1715 and "err_perm", deprecated since 4.83 when the RFC-defined words
1716 "temperror" and "permerror" were introduced.
1718 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1719 transport-filters or DKIM-signing. The restriction was lost in the
1720 consolidation of verify-callout and delivery SMTP handling.
1721 Extend the restriction to also cover ARC-signing.
1723 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1724 in defer=pass mode supply a 450 to the initiator. Previously the message
1727 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1728 tls_require_ciphers is used as before.
1730 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1731 "pass_unscanned". Only tmpfails from the scanner are written to
1732 the paniclog, as they may require admin intervention (permission
1733 denied, license issues). Other scanner errors (like decompression
1734 bombs) do not cause a paniclog entry.
1736 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1737 Previously it was possible to log spurious information in receive log
1740 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1741 triggered odd behaviour from Outlook Express clients.
1743 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1746 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1747 since the IETF WG has not yet settled on that versus the original
1748 "bare" representation.
1750 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1751 Previously the millisecond value corrupted the output.
1752 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1753 corrupted the output.
1759 JH/01 Rework error string handling in TLS interface so that the caller in
1760 more cases is responsible for logging. This permits library-sourced
1761 string to be attached to addresses during delivery, and collapses
1762 pairs of long lines into single ones.
1764 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1765 during configuration. Wildcards are allowed and expanded.
1767 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1768 This permits better logging.
1770 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1771 do not close it down and have the child transport start it up again on
1772 the passed-on TCP connection. Instead, proxy the child (and any
1773 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1774 affected: the continued delivery log lines do not have any DNSSEC, TLS
1775 Certificate or OCSP information. TLS cipher information is still logged.
1777 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1778 identical IP addresses on different listening ports. Will also affect
1781 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1782 add noisy ifdef guards to special-case this sillyness.
1783 Patch from Bernd Kuhls.
1785 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1786 than 255 are no longer allowed.
1788 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1789 Disable the session-cache too, which might reduce our load. Since we
1790 currrectly use a new context for every connection, both as server and
1791 client, there is no benefit for these.
1792 GnuTLS appears to not support tickets server-side by default (we don't
1793 call gnutls_session_ticket_enable_server()) but client side is enabled
1794 by default on recent versions (3.1.3 +) unless the PFS priority string
1797 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1798 <https://reproducible-builds.org/specs/source-date-epoch/>.
1800 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1801 the check for any unsuccessful recipients did not notice the limit, and
1802 erroneously found still-pending ones.
1804 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1805 MSG_MORE. Only in-clear (not on TLS connections).
1807 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1808 transport-filter is involved we can buffer the headers in memory for
1809 creating the signature, and read the spool data file once for the
1810 signature and again for transmission.
1812 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1813 4.77 as the kernel support then wasn't solid, having issues in 64bit
1814 mode. Now, it's been long enough. Add support for FreeBSD also.
1816 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1817 case where the routing stage had gathered several addresses to send to
1818 a host before calling the transport for the first, we previously failed
1819 to close down TLS in the old transport process before passing the TCP
1820 connection to the new process. The new one sent a STARTTLS command
1821 which naturally failed, giving a failed delivery and bloating the retry
1822 database. Investigation and fix prototype from Wolfgang Breyha.
1824 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1825 false-negatives in the check that the sender had not preempted a response
1826 or prompt from Exim (running as a server), due to that code's lack of
1827 awareness of the SMTP input buffering.
1829 PP/04 Add commandline_checks_require_admin option.
1830 Exim drops privileges sanely, various checks such as -be aren't a
1831 security problem, as long as you trust local users with access to their
1832 own account. When invoked by services which pass untrusted data to
1833 Exim, this might be an issue. Set this option in main configuration
1834 AND make fixes to the calling application, such as using `--` to stop
1837 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1838 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1839 responses to those, into a single TLS record each way (this usually means
1840 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1843 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1844 affects you only if you're dancing at the edge of the param size limits.
1845 If you are, and this message makes sense to you, then: raise the
1846 configured limit or use OpenSSL 1.1. Nothing we can do for older
1849 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1850 cmdline element to get the documented default one. Previously it was
1853 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1854 are unsuable for non-message-specific reasons - eg. connection timeout,
1855 banner-time rejection.
1857 JH/16 Fix logging of delivery remote port, when specified by router, under
1860 PP/06 Repair manualroute's ability to take options in any order, even if one
1861 is the name of a transport.
1864 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1866 JH/17 Change the list-building routines interface to use the expanding-string
1867 triplet model, for better allocation and copying behaviour.
1869 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1870 Previously it was constructed the first time a possibly-matching string
1871 was met in the configuration file input during startup; now it is done
1874 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1875 compatible one, to avoid the (poorly documented) possibility of a config
1876 file in the working directory redirecting the DB files, possibly correpting
1877 some existing file. CVE-2017-10140 assigned for BDB.
1879 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1880 cache-hot. Previously, although the result was properly cached, the
1881 initial verify call returned a defer.
1883 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1884 the main verify for receipient in uncached-mode.
1886 JH/22 Retire historical build files to an "unsupported" subdir. These are
1887 defined as "ones for which we have no current evidence of testing".
1889 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1890 if present. Previously it was ignored.
1892 JH/24 Start using specified-initialisers in C structure init coding. This is
1893 a C99 feature (it's 2017, so now considered safe).
1895 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1896 if was a fixed-sized field and bitmask ops via macros; it is now more
1899 PP/07 GitHub PR 56: Apply MariaDB build fix.
1900 Patch provided by Jaroslav Å karvada.
1902 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1903 during Coverity cleanups [4.87 JH/47]
1904 Diagnosis and fix provided by Michael Fischer v. Mollard.
1906 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1907 the right size to place the terminating semicolon on its own folded
1908 line, the header hash was calculated to an incorrect value thanks to
1909 the (relaxed) space the fold became.
1911 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1912 and confused the parent.
1914 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1915 which could crash as a result. This could lead to undeliverable messages.
1917 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1920 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1921 matters on fast-turnover and PID-randomising systems, which were getting
1922 out-of-order delivery.
1924 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1925 a possibly-overlapping copy. The symptom was that "Remote host closed
1926 connection in response to HELO" was logged instead of the actual 4xx
1929 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1930 Previously only that bufferd was discarded, resulting in SYMTP command
1933 JH/32 DKIM: when a message has multiple signatures matching an identity given
1934 in dkim_verify_signers, run the dkim acl once for each. Previously only
1935 one run was done. Bug 2189.
1937 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1938 "panic the current process" to "deliberately defer". The panic log is
1939 still written with the problem list name; the mail and reject logs now
1940 get a temp-reject line for the message that was being handled, saying
1941 something like "domains check lookup or other defer". The SMTP 451
1942 message is still "Temporary local problem".
1944 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1945 A crafted sequence of BDAT commands could result in in-use memory beeing
1946 freed. CVE-2017-16943.
1948 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1949 from SMTP input. Previously it was always done; now only done for DATA
1950 and not BDAT commands. CVE-2017-16944.
1952 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1953 to the message (such as an overlong header line). Previously this was
1954 not done and we did not exit BDAT mode. Followon from the previous item
1955 though a different problem.
1961 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1962 than -2003 did; needs libidn2 in addition to libidn.
1964 JH/02 The path option on a pipe transport is now expanded before use.
1966 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1967 Patch provided by "Björn", documentation fix added too.
1969 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1970 missing a wire-to-host endian conversion.
1972 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1973 close after a BDAT command line could be taken as a following command,
1974 giving a synch failure. Fix by only checking for synch immediately
1975 before acknowledging the chunk.
1977 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1978 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1979 macro. Patches provided by Josh Soref.
1981 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1982 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1983 by IANA as a service extension. However, John Klensin suggests that we
1986 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1987 the dkim code may be unix-mode line endings rather than smtp wire-format
1988 CRLF, so prepend a CR to any bare LF.
1990 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1991 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1993 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1994 the first were themselves being wrongly included in the feed into dkim
1995 processing; with most chunk sizes in use this resulted in an incorrect
1996 body hash calculated value.
1998 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1999 DKIM signature block, for verification. Although advised against by
2000 standards it is specifically not ruled illegal.
2002 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
2004 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
2005 missing a body hash (the bh= tag).
2007 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
2008 It seems that HAProxy sends the Proxy Protocol information in clear and
2009 only then does a TLS startup, so do the same.
2011 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
2012 TCP connections (such as for Spamd) unless the daemon successfully set
2013 Fast Open mode on its listening sockets. This fixes breakage seen on
2014 too-old kernels or those not configured for Fast Open, at the cost of
2015 requiring both directions being enabled for TFO, and TFO never being used
2016 by non-daemon-related Exim processes.
2018 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
2019 endings, at least on the first header line. Try to canonify any that get
2020 past that check, despite the cost.
2022 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
2023 now limited to an arbitrary five deep, while parsing addresses with the
2024 strip_excess_angle_brackets option enabled.
2026 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
2027 instead leave the unprompted TLS handshake in socket buffer for the
2028 TLS library to consume.
2030 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
2032 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
2034 JH/16 Drop variables when they go out of scope. Memory management drops a whole
2035 region in one operation, for speed, and this leaves assigned pointers
2036 dangling. Add checks run only under the testsuite which checks all
2037 variables at a store-reset and panics on a dangling pointer; add code
2038 explicitly nulling out all the variables discovered. Fixes one known
2039 bug: a transport crash, where a dangling pointer for $sending_ip_address
2040 originally assigned in a verify callout, is re-used.
2042 PP/06 Drop '.' from @INC in various Perl scripts.
2044 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2046 PP/08 Reduce a number of compilation warnings under clang; building with
2047 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2048 should be warning-free.
2050 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2052 HS/01 Fix portability problems introduced by PP/08 for platforms where
2053 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2055 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2056 chunk. This allows us to accept broken chunked messages. We need a more
2057 general solution here.
2059 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2060 already-broken messages in the queue.
2062 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2064 JH/19 Fix reference counting bug in routing-generated-address tracking.
2070 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2071 supports it and a size is available (ie. the sending peer gave us one).
2073 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2074 years of being deprecated). The replacements are the ACLs
2075 acl_smtp_mime and acl_not_smtp_mime.
2077 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2078 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2079 or even an in-clear connection were permitted. Now, if the host lookup
2080 was dnssec and dane was requested then the host is only used if the
2081 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2082 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2083 if one fails this test.
2084 This means that a poorly-configured remote DNS will make it incommunicado;
2085 but it protects against a DNS-interception attack on it.
2087 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2088 non-noisy when a race steals the message being considered.
2090 JH/05 If main configuration option tls_certificate is unset, generate a
2091 self-signed certificate for inbound TLS connections.
2093 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2094 in rewrites and routers.
2096 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2097 and logged a warning sing 4.83; now they are a configuration file error.
2099 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2100 (lacking @domain). Apply the same qualification processing as RCPT.
2102 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2104 JH/10 Support ${sha256:} applied to a string (as well as the previous
2107 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2108 a cutthrough deliver is pending, as we always want to make a connection.
2109 This also avoids re-routing the message when later placing the cutthrough
2110 connection after a verify cache hit.
2111 Do not update it with the verify result either.
2113 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2114 when routing results in more than one destination address.
2116 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2117 signing (which inhibits the cutthrough capability). Previously only
2118 the presence of an option was tested; now an expansion evaluating as
2119 empty is permissible (obviously it should depend only on data available
2120 when the cutthrough connection is made).
2122 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2123 the relevant preceding SMTP command did not note the pipelining mode.
2125 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2126 Previously they were not counted.
2128 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2129 as one having no matching records. Previously we deferred the message
2130 that needed the lookup.
2132 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2133 distinguished as "(=".
2135 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2136 for missing MX records. Previously it only worked for missing A records.
2138 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2140 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2141 after the data-go-ahead and data-ack. Patch from Jason Betts.
2143 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2144 even for a "none" policy. Patch from Tony Meyer.
2146 JH/22 Fix continued use of a connection for further deliveries. If a port was
2147 specified by a router, it must also match for the delivery to be
2150 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2151 When one of the recipients of a message was unsuitable for the connection
2152 (has no matching addresses), we lost track of needing to mark it
2153 deferred. As a result mail would be lost.
2155 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2157 JH/25 Decoding ACL controls is now done using a binary search; the source code
2158 takes up less space and should be simpler to maintain. Merge the ACL
2159 condition decode tables also, with similar effect.
2161 JH/26 Fix problem with one_time used on a redirect router which returned the
2162 parent address unchanged. A retry would see the parent address marked as
2163 delivered, so not attempt the (identical) child. As a result mail would
2166 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2167 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2168 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2171 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2172 Main config options check_{log,spool}_{inodes,space} are now
2173 100 inodes, 10MB unless set otherwise in the configuration.
2175 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2176 Previously it only applied to the main-section connection policy
2179 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2181 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2182 by me. Added RFC7919 DH primes as an alternative.
2184 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2185 are not in the system include path.
2187 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2188 GnuTLS, when a session startup failed (eg because the client disconnected)
2189 Exim did stdio operations after fclose. This was exposed by a recent
2190 change which nulled out the file handle after the fclose.
2192 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2193 signed directly by the cert-signing cert, rather than an intermediate
2194 OCSP-signing cert. This is the model used by LetsEncrypt.
2196 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2198 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2199 an incoming connection.
2201 HS/02 Bug 1802: Do not half-close the connection after sending a request
2204 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2205 fallback to "prime256v1".
2207 JH/34 SECURITY: Use proper copy of DATA command in error message.
2208 Could leak key material. Remotely exploitable. CVE-2016-9963.
2214 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2215 and 3.4.4 - once the server is enabled to respond to an OCSP request
2216 it does even when not requested, resulting in a stapling non-aware
2217 client dropping the TLS connection.
2219 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2220 support variable-length bit vectors. No functional change.
2222 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2223 The I= interface field on outgoing lines is now after the H= remote
2224 host field, same as incoming lines. There is a separate
2225 outgoing_interface log selector which allows you to disable the
2228 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2229 If not running log_selector +smtp_connection the mainlog would be held
2230 open indefinitely after a "too many connections" event, including to a
2231 deleted file after a log rotate. Leave the per net connection logging
2232 leaving it open for efficiency as that will be quickly detected by the
2233 check on the next write.
2235 HS/01 Bug 1671: Fix post transport crash.
2236 Processing the wait-<transport> messages could crash the delivery
2237 process if the message IDs didn't exist for some reason. When
2238 using 'split_spool_directory=yes' the construction of the spool
2239 file name failed already, exposing the same netto behaviour.
2241 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2242 mime_regex ACL conditions.
2244 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2245 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2246 to HELO, local diagnostic string.
2248 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2249 log line to debug. Even when configured with a tls authenticator many
2250 client connections are expected to not authenticate in this way, so
2251 an authenticate fail is not an error.
2253 HS/02 Add the Exim version string to the process info. This way exiwhat
2254 gives some more detail about the running daemon.
2256 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2257 matter for fast-change records such as DNSBLs.
2259 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2260 retry record, even if constant. There may be multiple transports with
2261 different interface settings and the retry behaviour needs to be kept
2264 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2266 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2268 JH/10 Bug 840: fix log_defer_output option of pipe transport
2270 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2271 hosts_randomize. This matters a lot when combined with mua_wrapper.
2273 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2274 ${quote_pgsql:<string>} operator.
2276 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2278 JH/14 Change header file name for freeradius-client. Relevant if compiling
2279 with Radius support; from the Gentoo tree and checked under Fedora.
2281 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2283 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2284 option transport_filter, meaning no filtering.
2286 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2288 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2289 defaults to "*" (all hosts). The variable is now available when not built
2290 with TLS, default unset, mainly to enable keeping the testsuite sane.
2291 If a server certificate is not supplied (via tls_certificate) an error is
2292 logged, and clients will find TLS connections fail on startup. Presumably
2293 they will retry in-clear.
2294 Packagers of Exim are strongly encouraged to create a server certificate
2295 at installation time.
2297 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2298 with the $config_file variable.
2300 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2301 in transport context, after the attempt, and per-recipient. The latter type
2302 is per host attempted. The event data is the error message, and the errno
2303 information encodes the lookup type (A vs. MX) used for the (first) host,
2304 and the trailing two digits of the smtp 4xx response.
2306 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2307 to write to mainlog (or rejectlog, paniclog) in the window between file
2308 creation and permissions/ownership being changed. Particularly affects
2309 installations where exicyclog is run as root, rather than exim user;
2310 result is that the running daemon panics and dies.
2312 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2314 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2315 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2316 "pri" and "weight". Note that the previous implicit priority given by the
2317 list order is no longer honoured.
2319 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2320 for DKIM processing.
2322 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2323 by defining SUPPORT_SOCKS.
2325 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2326 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2327 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2328 variables are renamed to proxy_{local,external}_{address,port}.
2330 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2331 for a build by defining SUPPORT_I18N
2333 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2334 of the query string, and make ${quote_redis:} do that quoting.
2336 JH/29 Move Events support from Experimental to mainline, enabled by default
2337 and removable for a build by defining DISABLE_EVENT.
2339 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2341 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2342 cached by the daemon.
2344 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2345 by defining LOOKUP_REDIS. The libhiredis library is required.
2347 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2348 keys are given for lookup.
2350 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2351 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2352 only supported when built with TLS support. The PolarSSL SHA routines
2353 are still used when the TLS library is too old for convenient support.
2355 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2356 openssl_options), for security. OpenSSL forces this from version 1.1.0
2357 server-side so match that on older versions.
2359 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2360 allocation for $value could be released as the expansion processing
2361 concluded, but leaving the global pointer active for it.
2363 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2364 and to use the domains and local_parts ACL conditions.
2366 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2367 incorrectly not doubled on cutthrough transmission, hence seen as a
2368 body-termination at the receiving system - resulting in truncated mails.
2369 Commonly the sender saw a TCP-level error, and retransmitted the message
2370 via the normal store-and-forward channel. This could result in duplicates
2371 received - but deduplicating mailstores were liable to retain only the
2372 initial truncated version.
2374 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2376 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2378 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2379 we're in there, support oversigning also; bug 1309.
2381 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2383 HS/04 Add support for keep_environment and add_environment options.
2385 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2386 either intentional arithmetic overflow during PRNG, or testing config-
2389 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2390 delivery resulted in actual delivery. Cancel cutthrough before DATA
2393 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2394 rejects a recipient: pass the reject to the originator.
2396 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2397 Many were false-positives and ignorable, but it's worth fixing the
2400 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2401 for the new environment-manipulation done at startup. Move the routines
2402 from being local to tls.c to being global via the os.c file.
2404 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2405 an extract embedded as result-arg for a map, the first arg for extract
2406 is unavailable so we cannot tell if this is a numbered or keyed
2407 extraction. Accept either.
2413 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2416 JH/02 The smtp transport option "multi_domain" is now expanded.
2418 JH/03 The smtp transport now requests PRDR by default, if the server offers
2421 JH/04 Certificate name checking on server certificates, when exim is a client,
2422 is now done by default. The transport option tls_verify_cert_hostnames
2423 can be used to disable this per-host. The build option
2424 EXPERIMENTAL_CERTNAMES is withdrawn.
2426 JH/05 The value of the tls_verify_certificates smtp transport and main options
2427 default to the word "system" to access the system default CA bundle.
2428 For GnuTLS, only version 3.0.20 or later.
2430 JH/06 Verification of the server certificate for a TLS connection is now tried
2431 (but not required) by default. The verification status is now logged by
2432 default, for both outbound TLS and client-certificate supplying inbound
2435 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2438 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2439 Status Notification (bounce) messages are now MIME format per RFC 3464.
2440 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2441 under the control of the dsn_advertise_hosts option, and routers may
2442 have a dsn_lasthop option.
2444 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2445 default, modifiable by a malware= option. The list separator for
2446 the options can now be changed in the usual way. Bug 68.
2448 JH/10 The smtp_receive_timeout main option is now expanded before use.
2450 JH/11 The incoming_interface log option now also enables logging of the
2451 local interface on delivery outgoing connections.
2453 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2454 if the interface and destination host and port all match.
2456 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2459 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2460 Patch from Andrew Lewis.
2462 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2463 now supports optional time-restrictions, weighting, and priority
2464 modifiers per server. Patch originally by <rommer@active.by>.
2466 JH/16 The spamd_address main option now supports a mixed list of local
2467 and remote servers. Remote servers can be IPv6 addresses, and
2468 specify a port-range.
2470 JH/17 Bug 68: The spamd_address main option now supports an optional
2471 timeout value per server.
2473 JH/18 Bug 1581: Router and transport options headers_add/remove can
2474 now have the list separator specified.
2476 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2479 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2482 JH/21 Support for the A6 type of dns record is withdrawn.
2484 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2485 rather than the verbs used.
2487 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2488 from 255 to 1024 chars.
2490 JH/24 Verification callouts now attempt to use TLS by default.
2492 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2493 are generic router options now. The defaults didn't change.
2495 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2496 Original patch from Alexander Shikoff, worked over by JH.
2498 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2499 files if ZCAT_COMMAND is not executable.
2501 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2503 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2505 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2506 Normally benign, it bites when the pair was led to by a CNAME;
2507 modern usage is to not canonicalize the domain to a CNAME target
2508 (and we were inconsistent anyway for A-only vs AAAA+A).
2510 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2512 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2513 when evaluating $sender_host_dnssec.
2515 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2516 $sender_helo_dnssec variable.
2518 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2520 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2522 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2524 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2525 documented as working, but never had. Support all but $spam_report.
2527 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2528 added for tls authenticator.
2530 HS/03 Add perl_taintmode main config option
2536 TL/01 When running the test suite, the README says that variables such as
2537 no_msglog_check are global and can be placed anywhere in a specific
2538 test's script, however it was observed that placement needed to be near
2539 the beginning for it to behave that way. Changed the runtest perl
2540 script to read through the entire script once to detect and set these
2541 variables, reset to the beginning of the script, and then run through
2542 the script parsing/test process like normal.
2544 TL/02 The BSD's have an arc4random API. One of the functions to induce
2545 adding randomness was arc4random_stir(), but it has been removed in
2546 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2547 function when detected.
2549 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2550 cause callback expansion.
2552 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2553 syntax errors in an expansion can be treated as a string instead of
2554 logging or causing an error, due to the internal use of bool_lax
2555 instead of bool when processing it.
2557 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2558 server certificates when making smtp deliveries.
2560 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2562 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2564 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2566 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2567 Merged patch from Sebastian Wiedenroth.
2569 JH/05 Fix results-pipe from transport process. Several recipients, combined
2570 with certificate use, exposed issues where response data items split
2571 over buffer boundaries were not parsed properly. This eventually
2572 resulted in duplicates being sent. This issue only became common enough
2573 to notice due to the introduction of connection certificate information,
2574 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2576 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2577 size buffer was used, resulting in syntax errors when an expansion
2580 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2581 version 3.3.6 or later.
2583 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2584 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2585 both become "event_action", the variables become $event_name, $event_data
2586 and $event_defer_errno. There is a new variable $verify_mode, usable in
2587 routers, transports and related events. The tls:cert event is now also
2588 raised for inbound connections, if the main configuration event_action
2591 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2592 early OCSP support, but no stapling (appears to be less than 1.0.0).
2594 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2595 server certificate names available under the smtp transport option
2596 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2599 JH/10 Time-related extraction expansions from certificates now use the main
2600 option "timezone" setting for output formatting, and are consistent
2601 between OpenSSL and GnuTLS compilations. Bug 1541.
2603 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2604 encoded parameter in the incoming message. Bug 1558.
2606 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2607 include certificate info, eximon was claiming there were spoolfile
2610 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2612 JH/14 Log delivery-related information more consistently, using the sequence
2613 "H=<name> [<ip>]" wherever possible.
2615 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2616 are problematic for Debian distribution, omit them from the release
2619 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2621 JH/16 Fix string representation of time values on 64bit time_t architectures.
2624 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2625 output list separator was used.
2630 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2631 checkers that were complaining about end of non-void function with no
2634 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2635 This was a regression introduced in 4.83 by another bugfix.
2637 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2639 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2640 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2646 TF/01 Correctly close the server side of TLS when forking for delivery.
2648 When a message was received over SMTP with TLS, Exim failed to clear up
2649 the incoming connection properly after forking off the child process to
2650 deliver the message. In some situations the subsequent outgoing
2651 delivery connection happened to have the same fd number as the incoming
2652 connection previously had. Exim would try to use TLS and fail, logging
2653 a "Bad file descriptor" error.
2655 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2656 utilities have not been installed.
2658 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2659 temporary space as the ACL may create new global variables.
2661 TL/01 LDAP support uses per connection or global context settings, depending
2662 upon the detected version of the libraries at build time.
2664 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2665 to extract and use the src ip:port in logging and expansions as if it
2666 were a direct connection from the outside internet. PPv2 support was
2667 updated based on HAProxy spec change in May 2014.
2669 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2671 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2672 Properly escape header and check for NULL return.
2674 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2677 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2679 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2680 characters in header names, implemented as a verify condition.
2681 Contributed by Michael Fischer v. Mollard.
2683 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2684 results permerror and temperror. Previous values are deprecated but
2685 still accepted. In a future release, err_perm and err_temp will be
2686 completely removed, which will be a backward incompatibility if the
2687 ACL tests for either of these two old results. Patch contributed by
2688 user bes-internal on the mailing list.
2690 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2692 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2693 selectors, in both main and reject logs.
2695 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2698 JH/07 Add malware type "sock" for talking to simple daemon.
2700 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2702 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2703 routers/transports under cutthrough routing.
2705 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2706 numbers. Touch up "bool" conditional to keep the same definition.
2708 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2710 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2712 JH/12 Expand items in router/transport headers_add or headers_remove lists
2713 individually rather than the list as a whole. Bug 1452.
2715 Required for reasonable handling of multiple headers_ options when
2716 they may be empty; requires that headers_remove items with embedded
2717 colons must have them doubled (or the list-separator changed).
2719 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2720 view the policy declared in the DMARC record. Currently, $dmarc_status
2721 is a combined value of both the record presence and the result of the
2724 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2726 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2727 dnslookup router and the smtp transport (applying to the forward
2730 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2731 of ldap servers used for a specific lookup. Patch provided by Heiko
2734 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2735 New variable $lookup_dnssec_authenticated for observability.
2737 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2738 Patch submitted by Lars Timman.
2740 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2742 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2743 Requires trusted mode and valid format message id, aborts otherwise.
2744 Patch contributed by Heiko Schlichting.
2746 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2747 certextract with support for various fields. Bug 1358.
2749 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2750 is requested by default, modifiable by smtp transport option
2753 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2754 operate on certificate variables to give certificate fingerprints
2755 Also new ${sha256:cert_variable}.
2757 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2759 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2760 Christian Aistleitner.
2762 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2764 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2765 file. Patch from Wolfgang Breyha.
2767 JH/25 Expand the coverage of the delivery $host and $host_address to
2768 client authenticators run in verify callout. Bug 1476.
2770 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2771 align with daemon_smtp_ports. Bug 72.
2773 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2774 support and error reporting did not work properly.
2776 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2777 and is readable. Patch from Andrew Colin Kissa.
2779 TL/14 Enhance documentation of ${run expansion and how it parses the
2780 commandline after expansion, particularly in the case when an
2781 unquoted variable expansion results in an empty value.
2783 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2785 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2786 by renaming away from it. Addresses GH issue 15, reported by
2789 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2791 TL/15 SECURITY: prevent double expansion in math comparison functions
2792 (can expand unsanitized data). Not remotely exploitable.
2799 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2801 PP/02 Make -n do something, by making it not do something.
2802 When combined with -bP, the name of an option is not output.
2804 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2807 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2808 $sender_host_name and config options to manage this, and basic check
2811 PP/05 DSCP support for outbound connections and control modifier for inbound.
2813 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2814 (Only plugin which currently uses this is kerberos4, which nobody should
2815 be using, but we should make it available and other future plugins might
2816 conceivably use it, even though it would break NAT; stuff *should* be
2817 using channel bindings instead).
2819 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2820 name; added for Sendmail compatibility; requires admin caller.
2821 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2822 just ignore it); requires trusted caller.
2823 Also parse but ignore: -Ac -Am -X<logfile>
2826 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2828 TL/02 Add +smtp_confirmation as a default logging option.
2830 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2831 Patch by Magnus Holmgren from 2007-02-20.
2833 TL/04 Bugzilla 1281 - Spec typo.
2834 Bugzilla 1283 - Spec typo.
2835 Bugzilla 1290 - Spec grammar fixes.
2837 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2839 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2841 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2842 mailing list by by Dmitry Isaikin.
2844 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2846 JH/02 Support "G" suffix to numbers in ${if comparisons.
2848 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2850 NM/01 Bugzilla 1197 - Spec typo
2851 Bugzilla 1196 - Spec examples corrections
2853 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2855 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2856 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2859 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2860 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2862 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2863 "acl {{name}{arg}...}", and optional args on acl condition
2866 JH/05 Permit multiple router/transport headers_add/remove lines.
2868 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2870 JH/07 Avoid using a waiting database for a single-message-only transport.
2871 Performance patch from Paul Fisher. Bugzilla 1262.
2873 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2876 JH/09 Add $headers_added variable, with content from use of ACL modifier
2877 add_header (but not yet added to the message). Bugzilla 199.
2879 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2880 Pulled from Bugzilla 817 by Wolfgang Breyha.
2882 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2884 (nb: this is the same fix as in Exim 4.80.1)
2886 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2889 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2892 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2894 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2895 advertise SMTP AUTH mechanism to us, instead of a generic
2896 protocol violation error. Also, make Exim more robust to bad
2897 data from the Dovecot auth socket.
2899 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2901 When a queue runner is handling a message, Exim first routes the
2902 recipient addresses, during which it prunes them based on the retry
2903 hints database. After that it attempts to deliver the message to
2904 any remaining recipients. It then updates the hints database using
2907 So if a recipient address works intermittently, it can get repeatedly
2908 deferred at routing time. The retry hints record remains fresh so the
2909 address never reaches the final cutoff time.
2911 This is a fairly common occurrence when a user is bumping up against
2912 their storage quota. Exim had some logic in its local delivery code
2913 to deal with this. However it did not apply to per-recipient defers
2914 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2916 This change adds a proper retry rule check during routing so that the
2917 final cutoff time is checked against the message's age. We only do
2918 this check if there is an address retry record and there is not a
2919 domain retry record; this implies that previous attempts to handle
2920 the address had the retry_use_local_parts option turned on. We use
2921 this as an approximation for the destination being like a local
2922 delivery, as in LMTP.
2924 I suspect this new check makes the old local delivery cutoff check
2925 redundant, but I have not verified this so I left the code in place.
2927 TF/02 Correct gecos expansion when From: is a prefix of the username.
2929 Test 0254 submits a message to Exim with the header
2933 When I ran the test suite under the user fanf2, Exim expanded
2934 the header to contain my full name, whereas it should have added
2935 a Resent-Sender: header. It erroneously treats any prefix of the
2936 username as equal to the username.
2938 This change corrects that bug.
2940 GF/01 DCC debug and logging tidyup
2941 Error conditions log to paniclog rather than rejectlog.
2942 Debug lines prefixed by "DCC: " to remove any ambiguity.
2944 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2946 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2947 Bug spotted by Jeremy Harris; was flawed since initial commit.
2948 Would have resulted in OCSP responses post-SNI triggering an Exim
2949 NULL dereference and crash.
2951 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2953 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2954 Bug detection, analysis and fix by Samuel Thibault.
2955 Bugzilla 1331, Debian bug #698092.
2957 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2959 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2960 Server implementation by Todd Lyons, client by JH.
2961 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2962 config variable "prdr_enable" controls whether the server
2963 advertises the facility. If the client requests PRDR a new
2964 acl_data_smtp_prdr ACL is called once for each recipient, after
2965 the body content is received and before the acl_smtp_data ACL.
2966 The client is controlled by both of: a hosts_try_prdr option
2967 on the smtp transport, and the server advertisement.
2968 Default client logging of deliveries and rejections involving
2969 PRDR are flagged with the string "PRDR".
2971 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2972 fclose(). Diagnosis by Todd Lyons.
2974 PP/17 Update configure.default to handle IPv6 localhost better.
2975 Patch by Alain Williams (plus minor tweaks).
2978 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2979 This is now consistent with GnuTLS, and is now documented: the
2980 previous undocumented portable approach to treating the option as
2981 unset was to force an expansion failure. That still works, and
2982 an empty string is now equivalent.
2984 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2985 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2986 not performing validation itself.
2988 PP/20 Added force_command boolean option to pipe transport.
2989 Patch from Nick Koston, of cPanel Inc.
2991 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2994 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2996 PP/21 Fix eximon continuous updating with timestamped log-files.
2997 Broken in a format-string cleanup in 4.80, missed when I repaired the
2998 other false fix of the same issue.
2999 Report and fix from Heiko Schlichting.
3002 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
3003 Report from Prashanth Katuri.
3005 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
3006 It's SecureTransport, so affects any MacOS clients which use the
3007 system-integrated TLS libraries, including email clients.
3009 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
3010 using a MIME ACL for non-SMTP local injection.
3011 Report and assistance in diagnosis by Warren Baker.
3013 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
3015 JH/16 Fix comparisons for 64b. Bugzilla 1385.
3017 TL/09 Add expansion variable $authenticated_fail_id to keep track of
3018 last id that failed so it may be referenced in subsequent ACL's.
3020 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
3023 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
3024 ldap library initialization, allowing self-signed CA's to be
3025 used. Also properly sets require_cert option later in code by
3026 using NULL (global ldap config) instead of ldap handle (per
3027 session). Bug diagnosis and testing by alxgomz.
3029 TL/12 Enhanced documentation in the ratelimit.pl script provided in
3030 the src/util/ subdirectory.
3032 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
3033 renamed to Transport Post Delivery Action by Jeremy Harris, as
3036 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
3037 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
3038 redis_servers = needs to be configured which will be used by the redis
3039 lookup. Patch from Warren Baker, of The Packet Hub.
3041 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3043 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3044 hostname or reverse DNS when processing a host list. Used suggestions
3045 from multiple comments on this bug.
3047 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3049 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3050 Missed a few lines, added it to make the runtest require no keyboard
3053 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3054 contains upper case chars. Make router use caseful_local_part.
3056 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3057 support when GnuTLS has been built with p11-kit.
3063 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3065 This, or similar/improved, will also be change PP/11 of 4.82.
3071 PP/01 Handle short writes when writing local log-files.
3072 In practice, only affects FreeBSD (8 onwards).
3073 Bugzilla 1053, with thanks to Dmitry Isaikin.
3075 NM/01 Bugzilla 949 - Documentation tweak
3077 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3080 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3082 PP/02 Implemented gsasl authenticator.
3084 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3086 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3087 `pkg-config foo` for cflags/libs.
3089 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3090 with rest of GSASL and with heimdal_gssapi.
3092 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3093 `pkg-config foo` for cflags/libs for the TLS implementation.
3095 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3096 properties get this fed in as external SSF. A number of robustness
3097 and debugging improvements to the cyrus_sasl authenticator.
3099 PP/08 cyrus_sasl server now expands the server_realm option.
3101 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3102 Patch by Jeremy Harris.
3104 PP/10 Added dbmjz lookup type.
3106 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3108 PP/12 MAIL args handles TAB as well as SP, for better interop with
3109 non-compliant senders.
3110 Analysis and variant patch by Todd Lyons.
3112 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3113 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3114 Patch from Dirk Mueller <dmueller@suse.com>
3116 PP/13 tls_peerdn now print-escaped for spool files.
3117 Observed some $tls_peerdn in wild which contained \n, which resulted
3118 in spool file corruption.
3120 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3121 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3122 or write after TLS renegotiation, which otherwise led to messages
3125 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3126 as a tracking header (ie: a signed header comes before the signature).
3127 Patch from Wolfgang Breyha.
3129 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3130 comma-sep list; embedded commas doubled.
3132 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3134 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3136 Report and patch from Dmitry Banschikov.
3138 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3139 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3140 failures. We appear to now support TLS1.1+ with Exim.
3142 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3143 lets Exim select keys and certificates based upon TLS SNI from client.
3144 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3145 before an outbound SMTP session. New log_selector, +tls_sni.
3147 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3148 NULL dereference. Report and patch from Alun Jones.
3150 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3151 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3152 Not seeing resolver debug output on NetBSD, but suspect this is a
3153 resolver implementation change.
3155 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3156 Left warnings. Added "eximon gdb" invocation mode.
3158 PP/21 Defaulting "accept_8bitmime" to true, not false.
3160 PP/22 Added -bw for inetd wait mode support.
3162 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3163 locate the relevant includes and libraries. Made this the default.
3165 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3166 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3168 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3169 This may cause build issues on older platforms.
3171 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3172 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3173 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3174 Added SNI support via GnuTLS too.
3175 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3177 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3179 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3180 Applied second patch from Janne, implementing suggestion to default
3181 multiple-strings-in-record handling to match SPF spec.
3183 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3185 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3186 read-only, out of scope).
3187 Patch from Wolfgang Breyha, report from Stuart Northfield.
3189 PP/29 Fix three issues highlighted by clang analyser static analysis.
3190 Only crash-plausible issue would require the Cambridge-specific
3191 iplookup router and a misconfiguration.
3192 Report from Marcin Mirosław.
3194 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3196 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3197 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3198 As part of this, removing so much warning spew let me fix some minor
3199 real issues in debug logging.
3201 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3202 assignment on my part. Fixed.
3204 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3205 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3206 Janne Snabb (who went above and beyond: thank you).
3208 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3209 string otherwise requires a connection and a bunch more work and it's
3210 relatively easy to get wrong. Should also expose TLS library linkage
3213 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3214 64-bit ${eval} (JH/03).
3216 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3217 GNU libc to support some of the 64-bit stuff, should not lead to
3218 conflicts. Defined before os.h is pulled in, so if a given platform
3219 needs to override this, it can.
3221 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3222 protection layer was required, which is not implemented.
3223 Bugzilla 1254, patch from Wolfgang Breyha.
3225 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3226 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3227 tls_dhparam take prime identifiers. Also unbreak combination of
3228 OpenSSL+DH_params+TLSSNI.
3230 PP/39 Disable SSLv2 by default in OpenSSL support.
3236 PP/01 Solaris build fix for Oracle's LDAP libraries.
3237 Bugzilla 1109, patch from Stephen Usher.
3239 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3241 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3244 TF/02 Fix a couple more cases where we did not log the error message
3245 when unlink() failed. See also change 4.74-TF/03.
3247 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3248 lock up or crash if it happened to be inside a call to libc when it
3249 got a SIGUSR1 from exiwhat.
3251 The SIGUSR1 handler appends the current process status to the process
3252 log which is later printed by exiwhat. It used to use the general
3253 purpose logging code to do this, but several functions it calls are
3254 not safe for signals.
3256 The new output code in the SIGUSR1 handler is specific to the process
3257 log, and simple enough that it's easy to inspect for signal safety.
3258 Removing some special cases also simplifies the general logging code.
3259 Removing the spurious timestamps from the process log simplifies
3262 TF/04 Improved ratelimit ACL condition.
3264 The /noupdate option has been deprecated in favour of /readonly which
3265 has clearer semantics. The /leaky, /strict, and /readonly update modes
3266 are mutually exclusive. The update mode is no longer included in the
3267 database key; it just determines when the database is updated. (This
3268 means that when you upgrade Exim will forget old rate measurements.)
3270 Exim now checks that the per_* options are used with an update mode that
3271 makes sense for the current ACL. For example, when Exim is processing a
3272 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3273 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3274 must specify per_mail/readonly. If you omit the update mode it defaults to
3275 /leaky where that makes sense (as before) or /readonly where required.
3277 The /noupdate option is now undocumented but still supported for
3278 backwards compatibility. It is equivalent to /readonly except that in
3279 ACLs where /readonly is required you may specify /leaky/noupdate or
3280 /strict/noupdate which are treated the same as /readonly.
3282 A useful new feature is the /count= option. This is a generalization
3283 of the per_byte option, so that you can measure the throughput of other
3284 aggregate values. For example, the per_byte option is now equivalent
3285 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3287 The per_rcpt option has been generalized using the /count= mechanism
3288 (though it's more complicated than the per_byte equivalence). When it is
3289 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3290 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3291 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3292 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3293 Note that using per_rcpt with a non-readonly update mode in more than
3294 one ACL will cause the recipients to be double-counted. (The per_mail
3295 and per_byte options don't have this problem.)
3297 The handling of very low rates has changed slightly. If the computed rate
3298 is less than the event's count (usually one) then this event is the first
3299 after a long gap. In this case the rate is set to the same as this event's
3300 count, so that the first message of a spam run is counted properly.
3302 The major new feature is a mechanism for counting the rate of unique
3303 events. The new per_addr option counts the number of different
3304 recipients that someone has sent messages to in the last time period. It
3305 behaves like per_rcpt if all the recipient addresses are different, but
3306 duplicate recipient addresses do not increase the measured rate. Like
3307 the /count= option this is a general mechanism, so the per_addr option
3308 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3309 example, measure the rate that a client uses different sender addresses
3310 with the options per_mail/unique=$sender_address. There are further
3311 details in the main documentation.
3313 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3315 TF/06 Removed a few PCRE remnants.
3317 TF/07 Automatically extract Exim's version number from tags in the git
3318 repository when doing development or release builds.
3320 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3321 Bugzilla 879. Patch from Paul Fisher.
3323 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3324 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3327 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3329 PP/05 Variable $av_failed, true if the AV scanner deferred.
3330 Bugzilla 1078. Patch from John Horne.
3332 PP/06 Stop make process more reliably on build failure.
3333 Bugzilla 1087. Patch from Heiko Schlittermann.
3335 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3336 Bugzilla 1089. Patch from Heiko Schlittermann.
3338 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3339 Bugzilla 1131. Patch from Holger Weiß.
3341 PP/09 Handle IPv6 addresses with SPF.
3342 Bugzilla 860. Patch from Wolfgang Breyha.
3344 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3346 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3349 PP/11 match_* no longer expand right-hand-side by default.
3350 New compile-time build option, EXPAND_LISTMATCH_RHS.
3351 New expansion conditions, "inlist", "inlisti".
3353 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3355 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3357 PP/14 fix log_write() format string regression from TF/03.
3358 Bugzilla 1152. Patch from Dmitry Isaikin.
3364 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3366 PP/02 Harmonised TLS library version reporting; only show if debugging.
3367 Layout now matches that introduced for other libraries in 4.74 PP/03.
3369 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3371 PP/04 New "dns_use_edns0" global option.
3373 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3376 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3377 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3379 TK/01 Updated PolarSSL code to 0.14.2.
3380 Bugzilla 1097. Patch from Andreas Metzler.
3382 PP/07 Catch divide-by-zero in ${eval:...}.
3383 Fixes bugzilla 1102.
3385 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3388 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3389 format-string attack -- SECURITY: remote arbitrary code execution.
3391 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3392 time unintentionally subject to list matching rules, letting the header
3393 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3394 arbitrary string expansion). This allowed for information disclosure.
3396 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3397 INT_MIN/-1 -- value coerced to INT_MAX.
3403 NM/01 Workaround for PCRE version dependency in version reporting
3406 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3407 This fixes portability to compilers other than gcc, notably
3408 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3410 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3411 makefiles for portability to HP-UX and POSIX correctness.
3413 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3414 Also via indented variable definition in the Makefile.
3415 (Debugging by Oliver Heesakkers).
3417 PP/02 Restore caching of spamd results with expanded spamd_address.
3418 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3420 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3421 Improves build reliability. Fix from: Frank Elsner
3423 NM/02 Fix wide character breakage in the rfc2047 coding
3424 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3426 NM/03 Allow underscore in dnslist lookups
3427 Fixes bug 1026. Patch from Graeme Fowler
3429 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3430 Code patches from Adam Ciarcinski of NetBSD.
3432 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3435 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3436 is logged, to avoid truncation. Patch from John Horne.
3438 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3439 Patch from Jakob Hirsch.
3441 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3442 SQL string expansion failure details.
3443 Patch from Andrey Oktyabrski.
3445 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3446 Patch from Simon Arlott.
3448 PP/09 New lookups functionality failed to compile on old gcc which rejects
3449 extern declarations in function scope.
3450 Patch from Oliver Fleischmann
3452 PP/10 Use sig_atomic_t for flags set from signal handlers.
3453 Check getgroups() return and improve debugging.
3454 Fixed developed for diagnosis in bug 927 (which turned out to be
3457 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3458 Patch from Mark Zealey.
3460 PP/12 Bugzilla 1056: Improved spamd server selection.
3461 Patch from Mark Zealey.
3463 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3464 Based on patch from Heiko Schlittermann.
3466 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3467 Patch from Uwe Doering, sign-off by Michael Haardt.
3469 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3470 variable declaration deep within a block. Bug and patch from
3473 PP/15 lookups-Makefile IRIX compatibility coercion.
3475 PP/16 Make DISABLE_DKIM build knob functional.
3477 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3478 Patch by Simon Arlott
3480 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3481 variable argument macros. Our copy now differs from upstream.
3487 TF/01 Failure to get a lock on a hints database can have serious
3488 consequences so log it to the panic log.
3490 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3491 controlled using the smtp_confirmation log selector.
3493 TF/03 Include the error message when we fail to unlink a spool file.
3495 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3496 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3497 for maintaining out-of-tree patches for some time.
3499 PP/01 Bugzilla 139: Documentation and portability issues.
3500 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3501 Handle per-OS dynamic-module compilation flags.
3503 PP/02 Let /dev/null have normal permissions.
3504 The 4.73 fixes were a little too stringent and complained about the
3505 permissions on /dev/null. Exempt it from some checks.
3506 Reported by Andreas M. Kirchwitz.
3508 PP/03 Report version information for many libraries, including
3509 Exim version information for dynamically loaded libraries. Created
3510 version.h, now support a version extension string for distributors
3511 who patch heavily. Dynamic module ABI change.
3513 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3514 privilege escalation vulnerability whereby the Exim run-time user
3515 can cause root to append content of the attacker's choosing to
3518 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3521 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3522 If dropping privileges for untrusted macros, we disabled normal logging
3523 on the basis that it would fail; for the Exim run-time user, this is not
3524 the case, and it resulted in successful deliveries going unlogged.
3525 Fixed. Reported by Andreas Metzler.
3531 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3532 only prepend for the Resent-* case. Fixes regression introduced in
3533 Exim 4.70 by NM/22 for Bugzilla 607.
3535 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3536 increasing numbers of administrators be bitten by this.
3538 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3540 PP/03 Bugzilla 994: added openssl_options main configuration option.
3542 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3544 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3546 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3548 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3549 without a peer certificate, leading to a segfault because of an
3550 assumption that peers always have certificates. Be a little more
3551 paranoid. Problem reported by Martin Tscholak.
3553 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3554 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3555 NB: ClamAV planning to remove STREAM in "middle of 2010".
3556 CL also introduces -bmalware, various -d+acl logging additions and
3557 more caution in buffer sizes.
3559 PP/09 Implemented reverse_ip expansion operator.
3561 PP/10 Bugzilla 937: provide a "debug" ACL control.
3563 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3565 PP/12 Bugzilla 973: Implement --version.
3567 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3569 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3571 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3573 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3574 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3575 ignore trailing whitespace.
3577 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3579 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3582 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3583 Notification from Dr Andrew Aitchison.
3585 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3586 ExtendedDetectionInfo response format.
3587 Notification from John Horne.
3589 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3592 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3593 XSL and documented dependency on system catalogs, with examples of how
3596 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3599 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3600 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3601 configuration file which is writeable by the Exim user or group.
3603 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3604 of configuration files to cover files specified with the -C option if
3605 they are going to be used with root privileges, not just the default
3608 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3609 option (effectively making it always true).
3611 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3612 files to be used while preserving root privileges.
3614 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3615 that rogue child processes cannot use them.
3617 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3618 run-time user, instead of root.
3620 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3621 Exim run-time user without dropping privileges.
3623 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3624 result string, instead of calling string_vformat() twice with the same
3627 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3628 for other users. Others should always drop root privileges if they use
3629 -C on the command line, even for a whitelisted configure file.
3631 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3633 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3639 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3640 $data_path, and $header_path variables; fixed documentation bugs and
3643 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3644 exipick to access non-standard spools, including the "frozen" queue
3647 NM/01 Bugzilla 965: Support mysql stored procedures.
3648 Patch from Alain Williams
3650 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3652 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3653 Patch from Andreas Metzler
3655 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3656 Patch from Kirill Miazine
3658 NM/05 Bugzilla 671: Added umask to procmail example.
3660 JJ/03 installed exipick 20100323.0, fixing doc bug
3662 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3663 directory. Notification and patch from Dan Rosenberg.
3665 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3667 TK/02 Improve log output when DKIM signing operation fails.
3669 MH/01 Treat the transport option dkim_domain as a colon separated
3670 list, not as a single string, and sign the message with each element,
3671 omitting multiple occurences of the same signer.
3673 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3674 Bugzilla 985, 986. Patch by Simon Arlott
3676 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3677 Patch by Simon Arlott
3679 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3680 MBX locking. Notification from Dan Rosenberg.
3686 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3688 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3690 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3692 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3694 NM/04 Bugzilla 915: Flag broken perl installation during build.
3700 TK/01 Added patch by Johannes Berg that expands the main option
3701 "spamd_address" if it starts with a dollar sign.
3703 TK/02 Write list of recipients to X-Envelope-Sender header when building
3704 the mbox-format spool file for content scanning (suggested by Jakob
3707 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3708 (http://www.dcc-servers.net/) support via dccifd. Activated by
3709 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3711 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3712 by Mark Daniel Reidel <mr@df.eu>.
3714 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3715 When building exim an external PCRE library is now needed -
3716 PCRE is a system library on the majority of modern systems.
3717 See entry on PCRE_LIBS in EDITME file.
3719 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3720 conversation. Added nologin parameter to request.
3721 Patch contributed by Kirill Miazine.
3723 TF/01 Do not log submission mode rewrites if they do not change the address.
3725 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3727 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3728 log files in place. Contributed by Roberto Lima.
3730 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3732 TF/03 Bugzilla 615: When checking the local_parts router precondition
3733 after a local_part_suffix or local_part_prefix option, Exim now
3734 does not use the address's named list lookup cache, since this
3735 contains cached lookups for the whole local part.
3737 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3738 Robert Millan. Documentation is in experimental-spec.txt.
3740 TF/04 Bugzilla 668: Fix parallel build (make -j).
3742 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3744 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3745 Patch provided by Jan Srzednicki.
3747 TF/05 Leading white space used to be stripped from $spam_report which
3748 wrecked the formatting. Now it is preserved.
3750 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3751 that they are available at delivery time.
3753 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3755 TF/08 TLS error reporting now respects the incoming_interface and
3756 incoming_port log selectors.
3758 TF/09 Produce a more useful error message if an SMTP transport's hosts
3759 setting expands to an empty string.
3761 NM/06 Bugzilla 744: EXPN did not work under TLS.
3762 Patch provided by Phil Pennock.
3764 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3765 Patch provided by Richard Godbee.
3767 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3768 acl_smtp_notquit, added index entry.
3770 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3771 Patch provided by Eugene Bujak.
3773 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3774 accept(). Patch provided by Maxim Dounin.
3776 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3777 Patch provided by Phil Pennock.
3779 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3781 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3782 Patch provided by Brad "anomie" Jorsch.
3784 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3785 Patch provided by Dean Brooks.
3787 TK/05 Add native DKIM support (does not depend on external libraries).
3789 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3790 Patch provided by Graeme Fowler.
3792 NM/16 Bugzilla 851: Documentation example syntax fix.
3794 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3796 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3799 NM/19 Bugzilla 745: TLS version reporting.
3800 Patch provided by Phil Pennock.
3802 NM/20 Bugzilla 167: bool: condition support.
3803 Patch provided by Phil Pennock.
3805 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3806 clients. Patch provided by Phil Pennock.
3808 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3809 Patch provided by Brad "anomie" Jorsch.
3811 NM/23 Bugzilla 687: Fix misparses in eximstats.
3812 Patch provided by Heiko Schlittermann.
3814 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3815 Patch provided by Heiko Schlittermann.
3817 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3818 plus update to original patch.
3820 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3822 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3823 Patch provided by David Brownlee.
3825 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3827 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3829 NM/30 Bugzilla 888: TLS documentation bugfixes.
3831 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3833 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3834 Unlike the original bugzilla I have changed all shell scripts in src tree.
3836 NM/33 Bugzilla 898: Transport filter timeout fix.
3837 Patch by Todd Rinaldo.
3839 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3840 Patch by Serge Demonchaux.
3842 NM/35 Bugzilla 39: Base64 decode bug fixes.
3843 Patch by Jakob Hirsch.
3845 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3847 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3849 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3851 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3857 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3858 ALT-N's libdkim that I have put here:
3859 http://duncanthrax.net/exim-experimental/
3861 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3862 were called 'true' and it seems that C99 defines that as a reserved
3863 keyword to be used with 'bool' variable types. That means you could
3864 not include C99-style headers which use bools without triggering
3865 build errors in sieve.c.
3867 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3868 as mailq or other aliases. Changed the --help handling significantly
3869 to do whats expected. exim_usage() emits usage/help information.
3871 SC/01 Added the -bylocaldomain option to eximstats.
3873 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3875 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3877 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3883 PH/01 Another patch from the Sieve maintainer.
3885 PH/02 When an IPv6 address is converted to a string for single-key lookup
3886 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3887 dots are used instead of colons so that keys in lsearch files need not
3888 contain colons. This was done some time before quoting was made available
3889 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3890 (notated using the quote facility) so as to distinguish them from IPv4
3891 keys. This meant that lookups for IP addresses in host lists did not work
3892 for iplsearch lookups.
3894 This has been fixed by arranging for IPv6 addresses to be expressed with
3895 colons if the lookup type is iplsearch. This is not incompatible, because
3896 previously such lookups could never work.
3898 The situation is now rather anomalous, since one *can* have colons in
3899 ordinary lsearch keys. However, making the change in all cases is
3900 incompatible and would probably break a number of configurations.
3902 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3905 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3906 conversion specification without a maximum field width, thereby enabling
3907 a rogue spamd server to cause a buffer overflow. While nobody in their
3908 right mind would setup Exim to query an untrusted spamd server, an
3909 attacker that gains access to a server running spamd could potentially
3910 exploit this vulnerability to run arbitrary code as the Exim user.
3912 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3913 $primary_hostname instead of what libspf2 thinks the hosts name is.
3915 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3916 a directory entry by the name of the lookup key. Previously, if a
3917 symlink pointed to a non-existing file or a file in a directory that
3918 Exim lacked permissions to read, a lookup for a key matching that
3919 symlink would fail. Now it is enough that a matching directory entry
3920 exists, symlink or not. (Bugzilla 503.)
3922 PH/03 The body_linecount and body_zerocount variables are now exported in the
3925 PH/04 Added the $dnslist_matched variable.
3927 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3928 This means they are set thereafter only if the connection becomes
3931 PH/06 Added the client_condition to authenticators so that some can be skipped
3932 by clients under certain conditions.
3934 PH/07 The error message for a badly-placed control=no_multiline_responses left
3935 "_responses" off the end of the name.
3937 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3939 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3940 (without spaces) instead of just copying the configuration text.
3942 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3944 PH/11 Added $max_received_linelength.
3946 PH/12 Added +ignore_defer and +include_defer to host lists.
3948 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3949 way in which PCRE > 7.0 is built.
3951 PH/14 Implemented queue_only_load_latch.
3953 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3954 MAIL command. The effect was to mangle the value on 64-bit systems.
3956 PH/16 Another patch from the Sieve maintainer.
3958 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3960 PH/18 If a system quota error occurred while trying to create the file for
3961 a maildir delivery, the message "Mailbox is full" was not appended to the
3962 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3963 only to a quota excession during the actual writing of the file.
3965 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3966 characters?) which causes problems in log lines. The DN values are now
3967 passed through string_printing() before being added to log lines.
3969 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3970 and InterBase are left for another time.)
3972 PH/21 Added message_body_newlines option.
3974 PH/22 Guard against possible overflow in moan_check_errorcopy().
3976 PH/23 POSIX allows open() to be a macro; guard against that.
3978 PH/24 If the recipient of an error message contained an @ in the local part
3979 (suitably quoted, of course), incorrect values were put in $domain and
3980 $local_part during the evaluation of errors_copy.
3986 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3987 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3990 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3991 issue a MAIL command.
3993 PH/02 In an ACL statement such as
3995 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3997 if a client was not listed at all, or was listed with a value other than
3998 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3999 the condition was not true (as it should be), so access was not denied.
4000 The bug was that the ! inversion was incorrectly passed on to the second
4001 item. This has been fixed.
4003 PH/03 Added additional dnslists conditions == and =& which are different from
4004 = and & when the dns lookup returns more than one IP address.
4006 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
4007 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
4009 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
4010 FSYNC, which compiles an option called disable_fsync that allows for
4011 bypassing fsync(). The documentation is heavily laced with warnings.
4013 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
4015 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
4016 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
4017 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
4018 including adding "make clean"; (3) Added -fPIC when compiling the test
4019 dynamically loaded module, to get rid of a warning.
4021 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
4022 message fails, move_frozen_messages = true and ignore_bounce_errors_after
4023 = 0s. The bug is otherwise harmless.
4025 PH/07 There was a bug in the dovecot authenticator such that the value of
4026 $auth1 could be overwritten, and so not correctly preserved, after a
4027 successful authentication. This usually meant that the value preserved by
4028 the server_setid option was incorrect.
4030 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
4032 PH/09 Installed PCRE release 7.0.
4034 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
4035 run for batched SMTP input. It is now run at the start of every message
4036 in the batch. While fixing this I discovered that the process information
4037 (output by running exiwhat) was not always getting set for -bs and -bS
4038 input. This is fixed, and it now also says "batched" for BSMTP.
4040 PH/11 Added control=no_pipelining.
4042 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4043 patch, slightly modified), and move the expansion of helo_data till after
4044 the connection is made in the smtp transport (so it can use these
4047 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4049 PH/14 Added log_selector = +pid.
4051 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4053 PH/16 Add ${if forany and ${if forall.
4055 PH/17 Added dsn_from option to vary the From: line in DSNs.
4057 PH/18 Flush SMTP output before performing a callout, unless control =
4058 no_callout_flush is set.
4060 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4061 was true (the default) a successful delivery failed to delete the retry
4062 item, thus causing premature timeout of the address. The bug is now
4065 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4067 PH/21 Long custom messages for fakedefer and fakereject are now split up
4068 into multiline responses in the same way that messages for "deny" and
4069 other ACL rejections are.
4071 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4072 with slight modification.
4074 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4075 draft, changing the syntax and factoring some duplicate code".
4077 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4078 for deliveries of the second and subsequent messages over the same SMTP
4081 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4082 ${reduce, with only minor "tidies".
4084 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4086 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4087 expansion side effects.
4089 PH/27 When a message times out after an over-quota error from an Exim-imposed
4090 quota, the bounce message says "mailbox is full". This message was not
4091 being given when it was a system quota that was exceeded. It now should
4094 MH/03 Made $recipients available in local_scan(). local_scan() already has
4095 better access to the recipient list through recipients_list[], but
4096 $recipients can be useful in postmaster-provided expansion strings.
4098 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4099 in the case of a MAIL command with additional options following the
4100 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4101 were accidentally chopped off.
4103 PH/29 SMTP synchronization checks are implemented when a command is read -
4104 there is a check that no more input is waiting when there shouldn't be
4105 any. However, for some commands, a delay in an ACL can mean that it is
4106 some time before the response is written. In this time, more input might
4107 arrive, invalidly. So now there are extra checks after an ACL has run for
4108 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4109 pipelining has not been advertised.
4111 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4113 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4114 returned in the SMTP response when smtp_return_error_details was false.
4115 This has been fixed.
4117 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4118 instead of the C I/O that was originally supplied, because problems were
4119 reported on Solaris.
4121 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4122 Exim which did not show up earlier: it was assuming that a call to
4123 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4124 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4125 was a macro that became an assignment, so it seemed to work. This has
4126 changed to a proper function call with a void return, hence the compile
4127 error. Exim's code has been fixed.
4129 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4132 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4134 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4136 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4137 because it turns out to be too big or there is a timeout) there is no
4138 "Completed" line in the log. When some messages of this type were
4139 selected by exigrep, they were listed as "not completed". Others were
4140 picked up by some special patterns. I have improved the selection
4141 criteria to be more general.
4143 PH/38 The host_find_failed option in the manualroute router can now be set
4144 to "ignore", to completely ignore a host whose IP address cannot be
4145 found. If all hosts are ignored, the behaviour is controlled by the new
4146 host_all_ignored option.
4148 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4149 homing or because of multiple MX records with /mx) generated more than
4150 one IP address, and the following item turned out to be the local host,
4151 all the secondary addresses of the first item were incorrectly removed
4152 from the list, along with the local host and any following hosts (which
4153 is what is supposed to happen).
4155 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4156 whoever called Exim into the -H file. In the case of the daemon it was
4157 behaving confusingly. When first started, it used values for whoever
4158 started the daemon, but after a SIGHUP it used the Exim user (because it
4159 calls itself on a restart). I have changed the code so that it now always
4162 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4163 message are rejected with the same error (e.g. no authentication or bad
4164 sender address), and a DATA command is nevertheless sent (as can happen
4165 with PIPELINING or a stupid MUA), the error message that was given to the
4166 RCPT commands is included in the rejection of the DATA command. This is
4167 intended to be helpful for MUAs that show only the final error to their
4170 PH/42 Another patch from the Sieve maintainer.
4172 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4173 Eximstats - Fixed some broken HTML links and added missing column headers
4175 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4176 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4178 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4180 PH/43 Yet another patch from the Sieve maintainer.
4182 PH/44 I found a way to check for a TCP/IP connection going away before sending
4183 the response to the final '.' that terminates a message, but only in the
4184 case where the client has not sent further data following the '.'
4185 (unfortunately, this is allowed). However, in many cases there won't be
4186 any further data because there won't be any more messages to send. A call
4187 to select() can be used: if it shows that the input is "ready", there is
4188 either input waiting, or the socket has been closed. An attempt to read
4189 the next input character can distinguish the two cases. Previously, Exim
4190 would have sent an OK response which the client would never have see.
4191 This could lead to message repetition. This fix should cure that, at
4192 least in a lot of common cases.
4194 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4195 advertised in response to EHLO.
4201 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4202 fixed by 4.65/MH/01 (is this a record?) are fixed:
4204 (i) An empty string was always treated as zero by the numeric comparison
4205 operators. This behaviour has been restored.
4207 (ii) It is documented that the numeric comparison operators always treat
4208 their arguments as decimal numbers. This was broken in that numbers
4209 starting with 0 were being interpreted as octal.
4211 While fixing these problems I realized that there was another issue that
4212 hadn't been noticed. Values of message_size_limit (both the global option
4213 and the transport option) were treated as octal if they started with 0.
4214 The documentation was vague. These values are now always treated as
4215 decimal, and I will make that clear in the documentation.
4221 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4222 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4225 MH/01 Don't check that the operands of numeric comparison operators are
4226 integers when their expansion is in "skipping" mode (fixes bug
4227 introduced by 4.64-PH/07).
4229 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4230 child addresses, Exim now panics and dies. Previously, because the count
4231 is held in a short int, deliveries were likely to be lost. As such a
4232 large number of recipients for a single message is ridiculous
4233 (performance will be very, very poor), I have chosen to impose a limit
4234 rather than extend the field.
4240 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4241 leftover -K file (the existence of which was triggered by #402).
4242 While we were at it, introduced process PID as part of the -K
4243 filename. This should rule out race conditions when creating
4246 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4247 processing considerably. Previous code took too long for large mails,
4248 triggering a timeout which in turn triggers #401.
4250 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4251 in the DK code in transports.c. sendfile() is not really portable,
4252 hence the _LINUX specificness.
4254 TF/01 In the add_headers option to the mail command in an Exim filter,
4255 there was a bug that Exim would claim a syntax error in any
4256 header after the first one which had an odd number of characters
4259 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4260 callout verification, Exim cached a "reject" for the entire domain. This
4261 is correct for most verifications, but it is not correct for a recipient
4262 verification with use_sender or use_postmaster set, because in that case
4263 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4264 case of MAIL FROM:<> rejection from other early rejections (e.g.
4265 rejection of HELO). When verifying a recipient using a non-null MAIL
4266 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4267 Whatever the result of the callout, the value of the domain cache is
4268 left unchanged (for any other kind of callout, getting as far as trying
4269 RCPT means that the domain itself is ok).
4271 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4274 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4275 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4276 session, the daemon ignores ECONNECT errors and logs others; it now
4277 ignores EPIPE as well.
4279 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4280 (quoted-printable decoding).
4282 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4283 later the small subsequent patch to fix an introduced bug.
4285 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4287 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4289 PH/08 An error is now given if message_size_limit is specified negative.
4291 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4292 to be given (somewhat) arbitrary names.
4294 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4297 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4298 miscellaneous code fixes
4300 PH/10 Added the log_reject_target ACL modifier to specify where to log
4303 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4304 hostname. This is wrong, because it relates to the incoming message (and
4305 probably the interface on which it is arriving) and not to the outgoing
4306 callout (which could be using a different interface). This has been
4307 changed to use the value of the helo_data option from the smtp transport
4308 instead - this is what is used when a message is actually being sent. If
4309 there is no remote transport (possible with a router that sets up host
4310 addresses), $smtp_active_hostname is used.
4312 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4313 tweaks were necessary in order to get it to work (see also 21 below):
4314 (a) The code assumed that strncpy() returns a negative number on buffer
4315 overflow, which isn't the case. Replaced with Exim's string_format()
4317 (b) There were several signed/unsigned issues. I just did the minimum
4318 hacking in of casts. There is scope for a larger refactoring.
4319 (c) The code used strcasecmp() which is not a standard C function.
4320 Replaced with Exim's strcmpic() function.
4321 (d) The code set only $1; it now sets $auth1 as well.
4322 (e) A simple test gave the error "authentication client didn't specify
4323 service in request". It would seem that Dovecot has changed its
4324 interface. Fortunately there's a specification; I followed it and
4325 changed what the client sends and it appears to be working now.
4327 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4330 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4331 address A is aliased to B and C, where B exists and C does not. Without
4332 -v the output is "A verified" because verification stops after a
4333 successful redirection if more than one address is generated. However,
4334 with -v the child addresses are also verified. Exim was outputting "A
4335 failed to verify" and then showing the successful verification for C,
4336 with its parentage. It now outputs "B failed to verify", showing B's
4337 parentage before showing the successful verification of C.
4339 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4340 look up a TXT record in a specific list after matching in a combined
4343 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4344 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4345 they consult the DNS. I had assumed they would set it the way they
4346 wanted; and indeed my experiments on Linux seem to show that in some
4347 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4348 To be on the safe side, however, I have now made the interface to
4349 host_find_byname() similar to host_find_bydns(), with an argument
4350 containing the DNS resolver options. The host_find_byname() function now
4351 sets these options at its start, just as host_find_bydns() does. The smtp
4352 transport options dns_qualify_single and dns_search_parents are passed to
4353 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4354 of host_find_byname() use the default settings of RES_DEFNAMES
4355 (qualify_single) but not RES_DNSRCH (search_parents).
4357 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4358 spool_read_header() do less string testing, by means of a preliminary
4359 switch on the second character of optional "-foo" lines. (This is
4360 overdue, caused by the large number of possibilities that now exist.
4361 Originally there were few.) While I was there, I also converted the
4362 str(n)cmp tests so they don't re-test the leading "-" and the first
4363 character, in the hope this might squeeze out yet more improvement.
4365 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4366 flag allowing group syntax was set by the header_syntax check but not
4367 turned off, possible causing trouble later; (2) The flag was not being
4368 set at all for the header_verify test, causing "group"-style headers to
4369 be rejected. I have now set it in this case, and also caused header_
4370 verify to ignore an empty address taken from a group. While doing this, I
4371 came across some other cases where the code for allowing group syntax
4372 while scanning a header line wasn't quite right (mostly, not resetting
4373 the flag correctly in the right place). These bugs could have caused
4374 trouble for malformed header lines. I hope it is now all correct.
4376 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4377 with the "reply" argument non-NULL. The code, however (which originally
4378 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4379 but it didn't always do it. This confused somebody who was copying the
4380 code for some other use. I have removed all the tests.
4382 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4383 feature that was used to support insecure browsers during the U.S. crypto
4384 embargo. It requires special client support, and Exim is probably the
4385 only MTA that supported it -- and would never use it because real RSA is
4386 always available. This code has been removed, because it had the bad
4387 effect of slowing Exim down by computing (never used) parameters for the
4388 RSA_EXPORT functionality.
4390 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4391 authenticator to fail if there's a tab character in the incoming data
4392 (there should never be unless someone is messing about, as it's supposed
4393 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4394 if the connection is using TLS or if the remote IP is the same as the
4395 local IP, and the "valid-client-cert option" if a client certificate has
4398 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4399 authenticators. This can be used for authorization after authentication
4400 succeeds. (In the case of plaintext, it servers for both authentication
4403 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4404 if any retry times were supplied.
4406 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4407 connection, where there is no client IP address to check. In this
4408 situation, the verify now always succeeds.
4410 PH/25 Applied John Jetmore's -Mset patch.
4412 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4414 PH/27 In a string expansion for a processed (not raw) header when multiple
4415 headers of the same name were present, leading whitespace was being
4416 removed from all of them, but trailing whitespace was being removed only
4417 from the last one. Now trailing whitespace is removed from each header
4418 before concatenation. Completely empty headers in a concatenation (as
4419 before) are ignored.
4421 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4422 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4424 PH/29 [Removed. This was a change that I later backed out, and forgot to
4425 correct the ChangeLog entry (that I had efficiently created) before
4426 committing the later change.]
4428 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4429 address errors (4xx response to RCPT) over the same connection as other
4430 messages routed to the same hosts. Such deliveries are always "forced",
4431 so retry times are not inspected. This resulted in far too many retries
4432 for the affected addresses. The effect occurred only when there were more
4433 hosts than the hosts_max_try setting in the smtp transport when it had
4434 the 4xx errors. Those hosts that it had tried were not added to the list
4435 of hosts for which the message was waiting, so if all were tried, there
4436 was no problem. Two fixes have been applied:
4438 (i) If there are any address or message errors in an SMTP delivery, none
4439 of the hosts (tried or untried) are now added to the list of hosts
4440 for which the message is waiting, so the message should not be a
4441 candidate for sending over the same connection that was used for a
4442 successful delivery of some other message. This seems entirely
4443 reasonable: after all the message is NOT "waiting for some host".
4444 This is so "obvious" that I'm not sure why it wasn't done
4445 previously. Hope I haven't missed anything, but it can't do any
4446 harm, as the worst effect is to miss an optimization.
4448 (ii) If, despite (i), such a delivery is accidentally attempted, the
4449 routing retry time is respected, so at least it doesn't keep
4450 hammering the server.
4452 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4453 in ${readsocket because some servers need this prod.
4455 PH/32 Added some extra debug output when updating a wait-xxx database.
4457 PH/33 The hint "could be header name not terminated by colon", which has been
4458 given for certain expansion errors for a long time, was not being given
4459 for the ${if def:h_colon_omitted{... case.
4461 PH/34 The spec says: "With one important exception, whenever a domain list is
4462 being scanned, $domain contains the subject domain." There was at least
4463 one case where this was not true.
4465 PH/35 The error "getsockname() failed: connection reset by peer" was being
4466 written to the panic log as well as the main log, but it isn't really
4467 panic-worthy as it just means the connection died rather early on. I have
4468 removed the panic log writing for the ECONNRESET error when getsockname()
4471 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4472 runs only) independently of the message's sender address. This meant
4473 that, if the 4xx error was in fact related to the sender, a different
4474 message to the same recipient with a different sender could confuse
4475 things. In particular, this can happen when sending to a greylisting
4476 server, but other circumstances could also provoke similar problems.
4477 I have changed the default so that the retry time for these errors is now
4478 based a combination of the sender and recipient addresses. This change
4479 can be overridden by setting address_retry_include_sender=false in the
4482 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4483 remote server are returned as part of bounce messages. This was not
4484 happening for LMTP over a pipe (the lmtp transport), but now it is the
4485 same for both kinds of LMTP.
4487 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4488 in header lines that were in fact CNAMEs. This is no longer the case.
4490 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4491 and queue runs started by the daemon processed all messages. This has
4492 been fixed so that -R and -S can now usefully be given with -q<time>.
4494 PH/40 Import PCRE release 6.7 (fixes some bugs).
4496 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4498 PH/42 Give an error if -q is specified more than once.
4500 PH/43 Renamed the variables $interface_address and $interface_port as
4501 $received_ip_address and $received_port, to make it clear that these
4502 values apply to message reception, and not to the outgoing interface when
4503 a message is delivered. (The old names remain recognized, of course.)
4505 PH/44 There was no timeout on the connect() call when using a Unix domain
4506 socket in the ${readsocket expansion. There now is.
4508 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4509 be meaningful with "accept".
4511 SC/01 Eximstats V1.43
4512 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4514 SC/02 Eximstats V1.44
4515 Use a glob alias rather than an array ref in the generated
4516 parser. This improves both readability and performance.
4518 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4519 Collect SpamAssassin and rejection statistics.
4520 Don't display local sender or destination tables unless
4521 there is data to show.
4522 Added average volumes into the top table text output.
4524 SC/04 Eximstats V1.46
4525 Collect data on the number of addresses (recipients)
4526 as well as the number of messages.
4528 SC/05 Eximstats V1.47
4529 Added 'Message too big' to the list of mail rejection
4530 reasons (thanks to Marco Gaiarin).
4532 SC/06 Eximstats V1.48
4533 Mainlog lines which have GMT offsets and are too short to
4534 have a flag are now skipped.
4536 SC/07 Eximstats V1.49 (Alain Williams)
4537 Added the -emptyok flag.
4539 SC/08 Eximstats V1.50
4540 Fixes for obtaining the IP address from reject messages.
4542 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4543 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4544 whitespace changes from 4.64-PH/27
4546 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4549 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4550 are found, allow negative numbers in numeric criteria)
4552 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4554 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4555 to match changes made in 4.64-PH/43
4557 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4559 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4560 "domain" is actually an IP address, and force a failure. This locks out
4561 those revolvers/nameservers that support "A-for-A" lookups, in
4562 contravention of the specifications.
4564 PH/48 When a host name was looked up from an IP address, and the subsequent
4565 forward lookup of the name timed out, the host name was left in
4566 $sender_host_name, contrary to the specification.
4568 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4569 restricted to single-key lookups, Exim was not diagnosing an error if
4570 * or *@ was used with a query-style lookup.
4572 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4574 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4575 long ago, but noone interested enough thought of it. Let's just say that
4576 the "1.1" means that there are some new functions that weren't there at
4577 some point in the past.
4579 PH/51 Error processing for expansion failure of helo_data from an smtp
4580 transport during callout processing was broken.
4582 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4583 tested/used via the -bh/-bhc/-bs options.
4585 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4586 bug, fixed in subsequent PCRE releases).
4588 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4589 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4591 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4597 SC/01 Use a glob alias rather than an array ref in eximstats generated
4598 parser. This improves both readability and performance.
4600 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4601 Don't display local sender or destination tables in eximstats unless
4602 there is data to show.
4603 Added average volumes into the eximstats top table text output.
4605 SC/03 Collect data on the number of addresses (recipients) as well
4606 as the number of messages in eximstats.
4608 TF/01 Correct an error in the documentation for the redirect router. Exim
4609 does (usually) call initgroups() when daemonizing.
4611 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4612 with consistent privilege compared to when running as a daemon.
4614 TF/03 Note in the spec that $authenticated_id is not set for local
4615 submissions from trusted users.
4617 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4618 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4620 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4621 by adding some example configuration directives to the default
4622 configuration file. A little bit of work is required to uncomment the
4623 directives and define how usernames and passwords are checked, but
4624 there is now a framework to start from.
4626 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4627 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4628 without this. I don't know how relevant this is to other LDAP libraries.
4630 PH/02 Add the verb name to the "unknown ACL verb" error.
4632 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4634 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4636 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4637 directory not expanded when it should be if an expanded home directory
4638 was set for the address (which is overridden by the transport).
4640 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4643 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4644 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4645 because it is too late at that time, and has no effect.
4647 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4648 security issue with \' (bugzilla #107). I could not use the
4649 PQescapeStringConn() function, because it needs a PGconn value as one of
4652 PH/08 When testing addresses using -bt, indicate those final addresses that
4653 are duplicates that would not cause an additional delivery. At least one
4654 person was confused, thinking that -bt output corresponded to deliveries.
4655 (Suppressing duplicates isn't a good idea as you lose the information
4656 about possibly different redirections that led to the duplicates.)
4658 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4659 systems where poll() doesn't work, in particular OS X.
4661 PH/10 Added more information to debugging output for retry time not reached.
4663 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4664 operations in malware.c.
4666 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4669 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4670 syslog_duplication set false, log lines that would normally be written
4671 both the the main log and to the reject log were not written to syslog at
4674 PH/14 In the default configuration, change the use of "message" in ACL warn
4675 statements to "add_header".
4677 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4678 not followed by a command (e.g. "seen endif").
4680 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4681 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4684 PH/17 Added extra conditions to the default value of delay_warning_condition
4688 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4689 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4690 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4693 The Auto-Submitted: and various List- headers are standardised, whereas I
4694 don't think Precedence: ever was.
4696 PH/18 Refactored debugging code in route_finduser() to show more information,
4697 in particular, the error code if getpwnam() issues one.
4699 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4700 This is apparently needed in addition to the PH/07 change above to avoid
4701 any possible encoding problems.
4703 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4704 but not after initializing Perl.
4706 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4707 output them only if debugging. By default they are written stderr,
4708 apparently, which is not desirable.
4710 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4713 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4716 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4718 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4719 authenticated or an ident call has been made. Suppress the default
4720 values for $authenticated_id and $authenticated_sender (but permit -oMai
4721 and -oMas) when testing with -bh.
4723 PH/24 Re-jigged the order of the tests in the default configuration so that the
4724 tests for valid domains and recipients precede the DNS black list and CSA
4725 tests, on the grounds that those ones are more expensive.
4727 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4728 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4729 This bug exists in every version of Exim that I still have, right back to
4732 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4733 However, an attempt to turn on case-sensitivity in a regex key by
4734 including (?-i) didn't work because the subject string was already
4735 lowercased, and the effects were non-intuitive. It turns out that a
4736 one-line patch can be used to allow (?-i) to work as expected.
4742 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4743 other effects) broke the use of negated acl sub-conditions.
4745 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4748 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4749 "Deny" causes Exim to reject the incoming connection with a 554 error.
4750 Unfortunately, if there is a major crisis, such as a disk failure,
4751 tcp-wrappers gives "deny", whereas what one would like would be some
4752 kind of temporary error. A kludge has been added to help with this.
4753 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4754 554 error is used if errno is still zero or contains ENOENT (which occurs
4755 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4758 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4760 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4761 errors. Otherwise a message that provokes a temporary error (when other
4762 messages do not) can cause a whole host to time out.
4764 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4765 addresses were routed directly to files or pipes from a redirect router.
4766 File deliveries just didn't batch; pipe deliveries might have suffered
4769 PH/06 A failure to get a lock for a hints database would erroneously always say
4770 "Failed to get write lock", even when it was really a read lock.
4772 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4773 of 0600. This has been changed to use the value of the lockfile_mode
4774 option (which defaults to 0600).
4776 PH/08 Applied small patch from the Sieve maintainer.
4778 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4779 folder from quota calculations, a direct delivery into this folder messed
4780 up the contents of the maildirsize file. This was because the regex was
4781 used only to exclude .Trash (or whatever) when the size of the mailbox
4782 was calculated. There was no check that a delivery was happening into an
4783 excluded directory. This bug has been fixed by ignoring all quota
4784 processing for deliveries into excluded directories.
4786 PH/10 Added the maildirfolder_create_regex option to appendfile.
4792 PH/01 The code for finding all the local interface addresses on a FreeBSD
4793 system running IPv6 was broken. This may well have applied to all BSD
4794 systems, as well as to others that have similar system calls. The broken
4795 code found IPv4 interfaces correctly, but gave incorrect values for the
4796 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4797 that it would not match correctly against @[] and not recognize the IPv6
4800 PH/02 The ipliteral router was not recognizing addresses of the form user@
4801 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4803 PH/03 Added disable_ipv6.
4805 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4806 decoded form, because it is most often used to construct To: headers
4807 lines in autoreplies, and the decoded form may well be syntactically
4808 invalid. However, $reply_address has leading white space removed, and all
4809 newlines turned into spaces so that the autoreply transport does not
4812 PH/05 If group was specified without a user on a router, and no group or user
4813 was specified on a transport, the group from the router was ignored.
4815 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4816 for visible compile-time settings that can be used to change these
4817 numbers, for those that want even more. Backwards compatibility with old
4818 spool files has been maintained. However, going back to a previous Exim
4819 release will lost any variables that are in spool files.
4821 PH/07 Two small changes when running in the test harness: increase delay when
4822 passing a TCP/IP connection to a new process, in case the original
4823 process has to generate a bounce, and remove special handling of
4824 127.0.0.2 (sic), which is no longer necessary.
4826 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4827 be the same on different OS.
4829 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4832 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4833 whether --show-vars was specified or not
4835 JJ/02 exipick: Added support for new ACL variable spool format introduced
4838 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4839 syntactically invalid From: or Reply-to: line, and a filter used this to
4840 generate an autoreply, and therefore failed to obtain an address for the
4841 autoreply, Exim could try to deliver to a non-existent relative file
4842 name, causing unrelated and misleading errors. What now happens is that
4843 it logs this as a hard delivery error, but does not attempt to create a
4846 PH/11 The exinext utility has a -C option for testing purposes, but although
4847 the given file was scanned by exinext itself; it wasn't being passed on
4848 when Exim was called.
4850 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4851 an end-of-file indication when reading a command response.
4853 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4854 compiled. In many other places in Exim, IPv6 addresses are always
4855 recognized, so I have changed this. It also means that IPv4 domain
4856 literals of the form [IPV4:n.n.n.n] are now always recognized.
4858 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4859 used if the router is not running as root, for example, when verifying at
4860 ACL time, or when using -bh. The debugging output from this situation was
4861 non-existent - all you got was a failure to exec. I have made two
4864 (a) Failures to set uid/gid, the current directory, or a process leader
4865 in a subprocess such as that created by queryprogram now generate
4866 suitable debugging output when -d is set.
4868 (b) The queryprogram router detects when it is not running as root,
4869 outputs suitable debugging information if -d is set, and then runs
4870 the subprocess without attempting to change uid/gid.
4872 PH/15 Minor change to Makefile for building test_host (undocumented testing
4875 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4876 additional section of a DNS packet that returns MX or SRV records.
4877 Instead, it always explicitly searches for A/AAAA records. This avoids
4878 major problems that occur when a DNS server includes only records of one
4879 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4880 fixed another bug: if SRV records were looked up and the corresponding
4881 address records were *not* found in the additional section, the port
4882 values from the SRV records were lost.
4884 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4885 using the correct key (the original address) when searching the retry
4886 rules in order to find which one to use for generating the retry hint.
4888 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4889 adding the default one. Similarly, if it contains a Reply-To: header, the
4890 errors_reply_to option, if set, is not used.
4892 PH/19 When calculating a retry time, Exim used to measure the "time since
4893 failure" by looking at the "first failed" field in the retry record. Now
4894 it does not use this if it is later than than the arrival time of the
4895 message. Instead it uses the arrival time. This makes for better
4896 behaviour in cases where some deliveries succeed, thus re-setting the
4897 "first failed" field. An example is a quota failure for a huge message
4898 when small messages continue to be delivered. Without this change, the
4899 "time since failure" will always be short, possible causing more frequent
4900 delivery attempts for the huge message than are intended.
4901 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4903 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4904 $1, $2, $3) because the numerical variables can be reset during some
4905 expansion items (e.g. "match"), thereby losing the authentication data.
4907 PH/21 Make -bV show the size of off_t variables so that the test suite can
4908 decide whether to run tests for quotas > 2G.
4910 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4911 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4912 filecount value is greater than 2G or if a quota value is greater than 2G
4913 on a system where the size of off_t is not greater than 4, a panic error
4916 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4917 never match. The debug and -bh output now contains an explicit error
4918 message indicating a malformed IPv4 address or mask.
4920 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4921 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4922 PH/23 above applies.
4924 PH/25 Do not write to syslog when running in the test harness. The only
4925 occasion when this arises is a failure to open the main or panic logs
4926 (for which there is an explicit test).
4928 PH/26 Added the /no_tell option to "control=freeze".
4930 PH/27 If a host name lookup failed very early in a connection, for example, if
4931 the IP address matched host_lookup and the reverse lookup yielded a name
4932 that did not have a forward lookup, an error message of the form "no IP
4933 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4934 could be logged. Now it outputs the IP address instead of "NULL".
4936 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4937 allows the sender and the authenticated sender to be set when
4938 submitting a message from within Exim. Since child_open_exim() is
4939 documented for local_scan(), the new function should be too.
4941 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4942 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4943 results in an empty string is now treated as unset.
4945 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4947 PH/31 Added sender_verify_fail logging option.
4949 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4950 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4951 tidied the source and removed it altogether.
4953 PH/33 When a queue run was abandoned because the load average was too high, a
4954 log line was always written; now it is written only if the queue_run log
4955 selector is set. In addition, the log line for abandonment now contains
4956 information about the queue run such as the pid. This is always present
4957 in "start" and "stop" lines but was omitted from the "abandon" line.
4959 PH/34 Omit spaces between a header name and the colon in the error message that
4960 is given when verify = headers_syntax fails (if there are lots of them,
4961 the message gets confusing).
4963 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4964 names, as there are now some PTR records that contain slashes. This check
4965 is only to protect against broken name servers that fall over on strange
4966 characters, so the fact that it applies to all lookups doesn't matter.
4968 PH/36 Now that the new test suite is complete, we can remove some of the
4969 special code in Exim that was needed for the old test suite. For example,
4970 sorting DNS records because real resolvers return them in an arbitrary
4971 order. The new test suite's fake resolver always returns records in the
4974 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4975 bounces) except when queue_only is set, to avoid logging races between
4976 the different processes.
4978 PH/38 Panic-die if .include specifies a non-absolute path.
4980 PH/39 A tweak to the "H" retry rule from its user.
4982 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4983 a label. They prevented compilation on older perls.
4985 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4986 a warning to be raised on newish perls.
4988 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4989 on queue. Changes to match documented behaviour of showing count of
4990 messages matching specified criteria.
4992 PH/40 Changed the default ident timeout from 30s to 5s.
4994 PH/41 Added support for the use of login_cap features, on those BSD systems
4995 that have them, for controlling the resources used by pipe deliveries.
4997 PH/42 The content-scanning code uses fopen() to create files in which to put
4998 message data. Previously it was not paying any attention to the mode of
4999 the files. Exim runs with umask(0) because the rest of the code creates
5000 files with open(), and sets the required mode explicitly. Thus, these
5001 files were ending up world-writeable. This was not a big issue, because,
5002 being within the spool directory, they were not world-accessible. I have
5003 created a function called modefopen, which takes an additional mode
5004 argument. It sets umask(777), creates the file, chmods it to the required
5005 mode, then resets the umask. All the relevant calls to fopen() in the
5006 content scanning code have been changed to use this function.
5008 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
5009 to 24 hours. This avoids potential overflow problems when processing G
5010 and H retry rules. I suspect nobody ever tinkers with this value.
5012 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
5014 PH/45 When the plaintext authenticator is running as a client, the server's
5015 challenges are checked to ensure they are valid base64 strings. By
5016 default, the authentication attempt is cancelled if an invalid string is
5017 received. Setting client_ignore_invalid_base64 true ignores these errors.
5018 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
5019 they are received. Thus, the responses can be made to depend on the
5020 challenges. If an invalid string is ignored, an empty string is placed in
5023 PH/46 Messages that are created by the autoreply transport now contains a
5024 References: header, in accordance with RFCs 2822 and 3834.
5026 PH/47 Added authenticated_sender_force to the smtp transport.
5028 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
5030 PH/49 Installed latest patch from the Sieve maintainer.
5032 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
5033 was also set, the appendfile transport was unnecessarily scanning a
5034 directory of message files (e.g. for maildir delivery) to find the count
5035 of files (along with the size), even though it did not need this
5036 information. It now does the scan only if it needs to find either the
5037 size of the count of files.
5039 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5041 PH/52 Two bugs concerned with error handling when the smtp transport is
5044 (i) Exim was not creating retry information for temporary errors given
5045 for individual recipients after the DATA command when the smtp transport
5046 was used in LMTP mode. This meant that they could be retried too
5047 frequently, and not timed out correctly.
5049 (ii) Exim was setting the flag that allows error details to be returned
5050 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5051 recipients that were returned after the DATA command.
5053 PH/53 This is related to PH/52, but is more general: for any failing address,
5054 when detailed error information was permitted to be returned to the
5055 sender, but the error was temporary, then after the final timeout, only
5056 "retry timeout exceeded" was returned. Now it returns the full error as
5057 well as "retry timeout exceeded".
5059 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5060 do this, and (what is worse) MTAs that accept it.
5062 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5063 will now be deprecated.
5065 PH/56 New os.c-cygwin from the Cygwin maintainer.
5067 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5068 formats (previously only available in exim formats via -bpr, -bpru,
5069 and -bpra. Now also available in native and exiqgrep formats)
5071 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5072 with very large, slow to parse queues
5074 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5076 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5078 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5079 responses to authentication challenges, though it was showing the
5080 challenges; (ii) I've removed the CR characters from the debug output for
5083 PH/58 Allow for the insertion of a newline as well as a space when a string
5084 is turned into more than one encoded-word during RFC 2047 encoding. The
5085 Sieve code now uses this.
5087 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5088 data_4xx, lost_connection, tls_required.
5090 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5091 message was being sent as an SMTP response.
5093 PH/61 Add -l and -k options to exicyclog.
5095 PH/62 When verifying, if an address was redirected to one new address, so that
5096 verification continued, and the new address failed or deferred after
5097 having set something in $address_data, the value of $address_data was not
5098 passed back to the ACL. This was different to the case when no
5099 redirection occurred. The value is now passed back in both cases.
5101 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5102 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5103 use login_cap.h, so on its own it isn't the distinguishing feature. The
5104 new name refers directly to the setclassresources() function.
5106 PH/65 Added configuration files for NetBSD3.
5108 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5110 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5111 is preferred over IPv4.
5113 PH/68 The bounce_return_message and bounce_return_body options were not being
5114 honoured for bounces generated during the reception of non-SMTP messages.
5115 In particular, this applied to messages rejected by the ACL. This bug has
5116 been fixed. However, if bounce_return_message is true and bounce_return_
5117 body is false, the headers that are returned for a non-SMTP message
5118 include only those that have been read before the error was detected.
5119 (In the case of an ACL rejection, they have all been read.)
5121 PH/69 The HTML version of the specification is now built in a directory called
5122 spec_html instead of spec.html, because the latter looks like a path with
5123 a MIME-type, and this confuses some software.
5125 PH/70 Catch two compiler warnings in sieve.c.
5127 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5128 function verify_get_ident() calls ip_connect() to connect a socket, but
5129 if the "connect()" function timed out, ip_connect() used to close the
5130 socket. However, verify_get_ident() also closes the socket later, and in
5131 between Exim writes to the log, which may get opened at this point. When
5132 the socket was closed in ip_connect(), the log could get the same file
5133 descriptor number as the socket. This naturally causes chaos. The fix is
5134 not to close the socket in ip_connect(); the socket should be closed by
5135 the function that creates it. There was only one place in the code where
5136 this was missing, in the iplookup router, which I don't think anybody now
5137 uses, but I've fixed it anyway.
5139 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5140 well as to direct DNS lookups. Otherwise the handling of names in host
5141 lists is inconsistent and therefore confusing.
5147 PH/01 Two changes to the default runtime configuration:
5149 (1) Move the checks for relay_from_hosts and authenticated clients from
5150 after to before the (commented out) DNS black list checks.
5152 (2) Add control=submission to the relay_from_hosts and authenticated
5153 clients checks, on the grounds that messages accepted by these
5154 statements are most likely to be submissions.
5156 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5158 (1) Generate an error if the third argument for the ${prvs expansion is
5161 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5164 (3) Reset the variables that are obtained from the first argument of
5165 ${prvscheck and used in the second argument before leaving the code,
5166 because their memory is reclaimed, so using them afterwards may do
5169 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5170 one (it's much easier than Tom thought :-).
5172 (5) Because of (4), we can now allow for the use of $prvscheck_result
5173 inside the third argument.
5175 PH/03 For some reason, the default setting of PATH when running a command from
5176 a pipe transport was just "/usr/bin". I have changed it to
5179 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5180 anything to be listed in the output from -bV.
5182 PH/05 When a filter generated an autoreply, the entire To: header line was
5183 quoted in the delivery log line, like this:
5185 => >A.N.Other <ano@some.domain> <original@ddress> ...
5187 This has been changed so that it extracts the operative address. There
5188 may be more than one such address. If so, they are comma-separated, like
5191 => >ano@some.domain,ona@other.domain <original@ddress> ...
5193 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5194 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5195 not being looked up in the rDNS to get a host name, Exim was showing the
5196 IP address twice in Received: lines, even though the IP addresses were
5197 identical. For example:
5199 Received: from [1.2.3.4] (helo=[1.2.3.4])
5201 However, if the real host name was known, it was omitting the HELO data
5202 if it matched the actual IP address. This has been tidied up so that it
5203 doesn't show the same IP address twice.
5205 PH/07 When both +timestamp and +memory debugging was on, the value given by
5206 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5207 called by the debug printing, thereby overwriting the timestamp buffer.
5208 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5210 PH/08 When the original message was included in an autoreply transport, it
5211 always said "this is a copy of the message, including all the headers",
5212 even if body_only or headers_only was set. It now gives an appropriate
5215 PH/09 Applied a patch from the Sieve maintainer which:
5217 o fixes some comments
5218 o adds the (disabled) notify extension core
5219 o adds some debug output for the result of if/elsif tests
5220 o points to the current vacation draft in the documentation
5221 and documents the missing references header update
5225 o fixes a bug in processing the envelope test (when testing
5226 multiple envelope elements, the last element determined the
5229 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5230 Electronic Mail") by including:
5232 Auto-submitted: auto-generated
5234 in the messages that it generates (bounce messages and others, such as
5235 warnings). In the case of bounce messages for non-SMTP messages, there was
5236 also a typo: it was using "Auto_submitted" (underscore instead of
5237 hyphen). Since every message generated by Exim is necessarily in response
5238 to another message, thes have all been changed to:
5240 Auto-Submitted: auto-replied
5242 in accordance with these statements in the RFC:
5244 The auto-replied keyword:
5246 - SHOULD be used on messages sent in direct response to another
5247 message by an automatic process,
5249 - MUST NOT be used on manually-generated messages,
5251 - MAY be used on Delivery Status Notifications (DSNs) and Message
5252 Disposition Notifications (MDNs),
5254 - MUST NOT be used on messages generated by automatic or periodic
5255 processes, except for messages which are automatic responses to
5258 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5259 to the default Received: header definition.
5261 PH/12 Added log selector acl_warn_skipped (default on).
5263 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5264 variables because (a) they are in the wrong storage pool and (b) even if
5265 they were copied, it wouldn't work properly because of the caching.
5267 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5268 checking when decoding. Apparently there are clients that generate
5269 overlong encoded strings. Why am I not surprised?
5271 PH/15 If the first argument of "${if match_address" was not empty, but did not
5272 contain an "@" character, Exim crashed. Now it writes a panic log message
5273 and treats the condition as false.
5275 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5277 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5278 extension "envelope-auth". The code is finished and in agreement with
5279 other implementations, but there is no documentation so far and in fact,
5280 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5281 not changing the active code.
5283 Print executed "if" and "elsif" statements when debugging is used. This
5284 helps a great deal to understand what a filter does.
5286 Document more things not specified clearly in RFC3028. I had all this
5287 sorted out, when out of a sudden new issues came to my mind. Oops."
5289 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5292 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5293 canonical form (as documented). However, after a host name lookup from
5294 the IP address, check_host() was doing a simple string comparison with
5295 addresses acquired from the DNS when checking that the found name did
5296 have the original IP as one of its addresses. Since any found IPv6
5297 addresses are likely to be in abbreviated form, the comparison could
5298 fail. Luckily, there already exists a function for doing the comparison
5299 by converting both addresses to binary, so now that is used instead of
5300 the text comparison.
5302 PH/20 There was another similar case to PH/19, when a complete host name was
5303 given in a host list; looking up its IP address could give an abbreviated
5304 form, whereas the current host's name might or might not be abbreviated.
5305 The same fix has been applied.
5311 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5312 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5315 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5316 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5318 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5320 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5321 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5322 Also, for "Auto-Submitted", treat anything other than "no" as
5323 non-personal, in accordance with RFC 3834. (Previously it treated
5324 anything starting "auto-" as non-personal.)
5326 TF/01 The control=submission/name=... option had a problem with syntax
5327 errors if the name included a slash character. The /name= option
5328 now slurps the rest of the string, so it can include any characters
5329 but it must come last in the list of options (after /sender_retain
5332 PH/05 Some modifications to the interface to the fake nameserver for the new
5340 TK/01 Added the "success_on_redirect" address verification option. See
5341 NewStuff for rationale and an example.
5343 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5345 PH/02 Patch to exigrep to allow it to work on syslog lines.
5347 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5348 fread() to skip over the body file's header line, because in Cygwin the
5349 header line is locked and is inaccessible.
5351 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5352 co-exist for some time) to make it clear that it is the Exim ID that is
5353 referenced, not the Message-ID: header line.
5355 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5356 string_format() function, because snprintf() does not exist on all
5359 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5360 ${stat: expansion item.
5362 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5363 protocol synchronization error", to keep the pedants happy.
5365 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5366 well as for IRIX systems, when gcc is being used. See the host.c source
5369 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5371 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5374 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5375 transport and to the smtp transport in LMTP mode.
5377 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5379 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5380 run a filter in a subprocess. This could lead to confusion in subsequent
5381 lookups in the parent process. There should also be a search_tidyup() at
5382 the end of the subprocess.
5384 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5385 only if the host matched helo_try_verify_hosts, which caused the
5386 verification to occur when the EHLO/HELO command was issued. The ACL just
5387 tested the remembered result. Now, if a previous verification attempt has
5388 not happened, "verify = helo" does it there and then.
5390 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5392 TK/03 Fix log output including CR from clamd.
5394 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5395 exist provoked a memory error which could cause a segfault.
5397 PH/15 Installed PCRE 6.2
5399 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5401 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5402 of the problem. Specifically, suggested +O2 rather than +O1 for the
5405 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5407 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5408 record, the port was not correctly logged when the outgoing_port log
5409 selector was set (it logged the transort's default port).
5411 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5412 fallback_hosts, and "hosts" in the smtp transport.
5414 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5415 host errors such as "Connection refused".
5417 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5418 authentication with radiusclient 0.4.9:
5420 - Error returned from rc_read_config was caught wrongly
5421 - Username/password not passed on to radius server due to wrong length.
5423 The presumption is that some radiusclient API changes for 4.51/PH/17
5424 were not taken care of correctly. The code is still untested by me (my
5425 Linux distribution still has 0.3.2 of radiusclient), but it was
5426 contributed by a Radius user.
5428 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5429 expanding the "port" option of the smtp transport.
5431 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5432 while reading a MIME header. Thanks to Tom Hughes for a patch.
5434 PH/24 Include config.h inside local_scan.h so that configuration settings are
5437 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5438 that in an ACL for RCPT (for example), you can examine exactly what was
5441 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5442 commands, but it was not correctly comparing the address with the actual
5443 client host address. Thus, it would show the EHLO address in Received:
5444 header lines when this was not necessary.
5446 PH/27 Added the % operator to ${eval:}.
5448 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5449 it should be ignoring failures (because with -C, for example, it has lost
5450 privilege). It wasn't ignoring creation failures other than "already
5453 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5456 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5457 because an input line was too long, either on its own, or by virtue of
5458 too many continuations, the temporary file was not being removed, and the
5459 return code was incorrect.
5461 PH/31 Missing "BOOL" in function definition in filtertest.c.
5463 PH/32 Applied Sieve patches from the maintainer.
5465 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5467 PH/33 Added "verify = not_blind".
5469 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5470 Local/Makefile (with some defaults set). These are used in built scripts
5471 such as exicyclog, but they have never been used in the exim_install
5472 script (though there are many overriding facilities there). I have
5473 arranged that the exim_install script now takes note of these two
5476 PH/35 Installed configuration files for Dragonfly.
5478 PH/36 When a locally submitted message by a trusted user did not contain a
5479 From: header, and the sender address was obtained from -f or from an SMTP
5480 MAIL command, and the trusted user did not use -F to supply a sender
5481 name, $originator_name was incorrectly used when constructing a From:
5482 header. Furthermore, $originator_name was used for submission mode
5483 messages from external hosts without From: headers in a similar way,
5484 which is clearly wrong.
5486 PH/37 Added control=suppress_local_fixups.
5488 PH/38 When log_selector = +received_sender was set, and the addition of the
5489 sender made the log line's construction buffer exactly full, or one byte
5490 less than full, an overflow happened when the terminating "\n" was
5493 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5494 when the result of a list match is failure because a DNS lookup failed.
5496 PH/40 RM_COMMAND is now used in the building process.
5498 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5499 the "build-* directories that it finds.
5501 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5502 address in a domain literal was a prefix of an interface address.
5504 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5505 when verifying a sender address, unless rewrite_headers is false.
5507 PH/44 Wrote a long comment about why errors_to addresses are verified as
5508 recipients, not senders.
5510 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5511 the ratelimit ACL was added.
5513 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5515 PH/46 Added extra information about PostgreSQL errors to the error string.
5517 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5518 avoiding the need to install special zones in a real server. This is
5519 backwards compatible; if it can't find the fake resolver, it drops back.
5520 Thus, both old and new test suites can be run.
5522 TF/02 Added util/ratelimit.pl
5524 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5525 clock is set back in time.
5527 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5528 Candler <B.Candler@pobox.com>.
5530 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5531 OK for addresses that are the result of redirections.
5533 PH/48 A number of further additions for the benefit of the new test suite,
5534 including a fake gethostbyname() that interfaces to the fake DNS resolver
5537 TF/06 The fix for widen_domains has also been applied to qualify_single and
5538 search_parents which are the other dnslookup options that can cause
5541 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5544 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5546 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5547 service" if it encountered an MX record with an empty target hostname.
5548 The message is now "an MX or SRV record indicated no SMTP service".
5550 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5551 if the DNS of the sending site is misconfigured. This is quite a
5552 common situation. This change restores the behaviour of treating a
5553 helo verification defer as a failure.
5555 PH/51 If self=fail was set on a router, the bounce message did not include the
5556 actual error message.
5562 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5564 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5565 command itself ended in error, the underlying message about the transport
5566 filter timeout was being overwritten with the pipe command error. Now the
5567 underlying error message should be appended to the second error message.
5569 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5571 PH/02 Reduce the amount of output that "make" produces by default. Full output
5572 can still be requested.
5574 PH/03 The warning log line about a condition test deferring for a "warn" verb
5575 was being output only once per connection, rather than after each
5576 occurrence (because it was using the same function as for successful
5577 "warn" verbs). This seems wrong, so I have changed it.
5579 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5580 it should not have, which might have caused a crash in the right
5581 circumstances, but probably never did.
5583 PH/04 Installed a modified version of Tony Finch's patch to make submission
5584 mode fix the return path as well as the Sender: header line, and to
5585 add a /name= option so that you can make the user's friendly name appear
5588 TF/03 Added the control = fakedefer ACL modifier.
5590 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5591 Mark Lowes for thorough testing.
5593 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5595 TK/03 Merged latest SRS patch from Miles Wilton.
5597 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5598 with the definition in sysexits.h (which is #included earlier).
5599 Fortunately, Exim does not actually use EX_OK. The code used to try to
5600 preserve the sysexits.h value, by assuming that macro definitions were
5601 scanned for macro replacements. I have been disabused of this notion,
5602 so now the code just undefines EX_OK before #including unistd.h.
5604 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5605 in the smtp transport. When a block could not be written in a single
5606 write() function, the timeout was being re-applied to each part-write.
5607 This seems wrong - if the receiver was accepting one byte at a time it
5608 would take for ever. The timeout is now adjusted when this happens. It
5609 doesn't have to be particularly precise.
5611 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5612 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5614 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5615 without a domain if the check to <postmaster@domain> fails.
5617 SC/01 Eximstats: added -xls and the ability to specify output files
5618 (patch written by Frank Heydlauf).
5620 SC/02 Eximstats: use FileHandles for outputting results.
5622 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5624 SC/04 Eximstats: fixed display of large numbers with -nvr option
5626 SC/05 Eximstats: fixed merging of reports with empty tables.
5628 SC/06 Eximstats: added the -include_original_destination flag
5630 SC/07 Eximstats: removed tabs and trailing whitespace.
5632 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5634 TK/06 MBOX spool code: Add real "From " MBOX separator line
5635 so the .eml file is really in mbox format (even though
5636 most programs do not really care). Patch from Alex Miller.
5638 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5639 The latter is generated from $received_to and is only set if the
5640 message has one envelope recipient. SA can use these headers,
5641 obviously out-of-the-box. Patch from Alex Miller.
5643 PH/08 The ${def test on a variable was returning false if the variable's
5644 value was "0", contrary to what the specification has always said!
5645 The result should be true unless the variable is empty.
5647 PH/09 The syntax error of a character other than { following "${if
5648 def:variable_name" (after optional whitespace) was not being diagnosed.
5649 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5650 accidental colon was present, for example, could give incorrect results.
5652 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5653 result is used (not including appendfile, where other changes are about
5656 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5657 This involved changing a lot of size variables from int to off_t. It
5658 should work with maildirs and everything.
5660 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5661 spamd dying while we are connected to it.
5663 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5666 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5667 function for BDB 4.3.
5669 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5671 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5672 the sources for PCRE have been re-arranged and more files are now
5675 PH/15 The code I had for printing potentially long long variables in PH/11
5676 above was not the best (it lost precision). The length of off_t variables
5677 is now inspected at build time, and an appropriate printing format (%ld
5678 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5679 to be "long long int" or "long int". This is needed for the internal
5680 formatting function string_vformat().
5682 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5683 the configuration file to be ":syslog", then the script "guesses" where
5684 the logs files are, rather than using the compiled in default. In our
5685 case the guess is not the same as the compiled default, so the script
5686 suddenly stopped working when I started to use syslog. The patch checks
5687 to see if log_file_path is "". If so, it attempts to read it from exim
5688 with no configuration file to get the compiled in version, before it
5689 falls back to the previous guessing code."
5691 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5692 implementing BATV in an Exim configuration. See NewStuff for the gory
5695 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5696 Makefile that are specific to HP-UX.
5698 PH/18 If the "use_postmaster" option was set for a recipient callout together
5699 with the "random" option, the postmaster address was used as the MAIL
5700 FROM address for the random test, but not for the subsequent recipient
5701 test. It is now used for both.
5703 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5704 patch removes a few documentation additions to RFC 3028, because the
5705 latest draft now contains them. It adds the new en;ascii-case comparator
5706 and a new error check for 8bit text in MIME parts. Comparator and
5707 require names are now matched exactly. I enabled the subaddress
5708 extension, but it is not well tested yet (read: it works for me)."
5710 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5711 rework some of the code of TK/09 above to avoid the hardwired use of
5712 "%lld" and "long long". Replaced the call to snprintf() with a call to
5715 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5716 records point to non-existent hosts", "retry timeout exceeded", and
5717 "retry time not reached for any host after a long failure period".
5719 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5720 experimental DomainKeys support:
5722 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5723 (2) On an error such as an illegally used "control", the wrong name for
5724 the control was given.
5726 These problems did NOT occur unless DomainKeys support was compiled.
5728 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5730 PH/24 Added ${if match_ip condition.
5732 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5733 databases so that it will be absolutely obvious if a crash occurs in the
5734 DB library. This is a regular occurrence (often caused by mis-matched
5737 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5738 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5739 picked up on a user's system that detects such things. There doesn't seem
5740 to be a gcc warning option for this - only an attribute that has to be
5741 put on the function's prototype. It seems that in Fedora Core 4 they have
5742 set this on a number of new functions. No doubt there will be more in due
5745 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5746 specify a transport. However, if an address that was verified by such a
5747 router was the subject of a callout, Exim crashed because it tried to
5748 read the rcpt_include_affixes from the non-existent transport. Now it
5749 just assumes that the setting of that option is false. This bug was
5750 introduced by 4.51/PH/31.
5752 PH/28 Changed -d+all to exclude +memory, because that information is very
5753 rarely of interest, but it makes the output a lot bigger. People tend to
5754 do -d+all out of habit.
5756 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5757 code in os-type was giving problems when libc.so lives in lib64, like on
5760 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5761 aren't the modern standard, and it seems that some systems' include files
5762 don't always have them. Exim was already checking for some of the newer
5763 ones like T_AAAA, and defining it itself. I've added checks for all the
5764 record types that Exim uses.
5766 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5767 not automatically generating a new one, as it is supposed to. This
5768 prevented TLS from working. If the file did exist, but contained invalid
5769 data, a new version was generated, as expected. It was only the case of a
5770 non-existent file that was broken.
5772 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5773 with a change in libdomainkeys > 0.64.
5775 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5776 from DNS. If the selector record carries the flag, it now has
5777 precedence over the domain-wide flag.
5779 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5781 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5782 the use of a port name that isn't defined in /etc/services) occurred, the
5783 message was deferred as in a normal delivery, and thus remained on the
5784 spool, instead of being failed because of the mua_wrapper setting. This
5785 is now fixed, and I tidied up some of the mua_wrapper messages at the
5788 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5789 the messages in a hash of arrays rather than using individual hashes.
5790 This is a bit cleaner and results in dramatic memory savings, albeit
5791 at a slight CPU cost.
5793 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5794 as requested by Marc Sherman.
5796 SC/10 Eximstats: added histograms for user specified patterns as requested
5799 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5801 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5802 fopen() in the content-scanning modules that did not already have it.
5808 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5809 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5811 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5813 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5815 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5816 to test Sieve filters that use "vacation".
5818 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5819 that changes the way the GnuTLS parameters are stored in the cache file.
5820 The new format can be generated externally. For backward compatibility,
5821 if the data in the cache doesn't make sense, Exim assumes it has read an
5822 old-format file, and it generates new data and writes a new file. This
5823 means that you can't go back to an older release without removing the
5826 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5827 work if there are any delivery delays because "one_time" forces the
5828 parent to be marked "delivered", so its unseen clone is never tried
5829 again. For this reason, Exim now forbids the simultaneous setting of
5832 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5833 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5834 entry if you want to know the details. The fix, however, neglected to
5835 consider the case when local delivery batching is involved. The test for
5836 "previously delivered" was not happening when checking to see if an
5837 address could be batched with a previous (undelivered) one; under
5838 certain circumstances this could lead to multiple deliveries to the same
5841 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5842 in its include files, and this causes problems building Exim.
5844 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5845 header_syntax) but Exim was just ignoring anything given after a slash.
5846 In particular, this caused confusion with an attempt to use "verify =
5847 reverse_host_lookup/defer_ok". An error is now given when options are
5848 supplied for verify items that do not have them. (Maybe reverse_host_
5849 lookup should have a defer_ok option, but that's a different point.)
5851 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5852 defined by RFC 821) to 2048, because there were problems with some AUTH
5853 commands, and RFC 1869 says the size should be increased for extended
5854 SMTP commands that take arguments.
5856 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5859 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5860 "unknown" error; now it says that the functionality isn't in the binary.
5862 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5863 an address' error message when a string expansion fails (syntax or
5864 whatever). Otherwise the password may appear in the log. Following change
5865 PH/42 below, there is no longer a chance of it appearing in a bounce
5868 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5870 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5871 of its addresses was ever tried. (Bugzilla bug #2.)
5873 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5874 the result incorrectly in the debug output. (It correctly added a newline
5875 to what was transported.)
5877 TF/01 Added $received_time.
5879 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5880 commented out examples of how to interface to a virus scanner and to
5881 SpamAssassin. Also added commented examples of av_scanner and
5882 spamd_address settings.
5884 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5885 and controls are allowed in which ACLs. There were a couple of minor
5886 errors. Some of the entries in the conditions table (which is a table of
5887 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5888 negation of where the condition IS allowed.
5890 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5892 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5893 header file does not have a version number, so I've had to invent a new
5894 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5895 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5896 radiusclient), but it was contributed by a Radius user.
5898 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5899 files or directories, for OpenSSL.
5901 PH/19 When an Exim process that is running as root has to create an Exim log
5902 file, it does so in a subprocess that runs as exim:exim so as to get the
5903 ownership right at creation (otherwise, other Exim processes might see
5904 the file with the wrong ownership). There was no test for failure of this
5905 fork() call, which would lead to the process getting stuck as it waited
5906 for a non-existent subprocess. Forks do occasionally fail when resources
5907 run out. I reviewed all the other calls to fork(); they all seem to check
5910 PH/20 When checking for unexpected SMTP input at connect time (before writing
5911 the banner), Exim was not dealing correctly with a non-positive return
5912 from the read() function. If the client had disconnected by this time,
5913 the result was a log entry for a synchronization error with an empty
5914 string after "input=" when read() returned zero. If read() returned -1
5915 (an event I could not check), uninitialized data bytes were printed.
5916 There were reports of junk text (parts of files, etc) appearing after
5919 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5921 PH/22 Added support for macro redefinition, and (re)definition in between
5922 driver and ACL definitions.
5924 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5925 forgetting to use the resulting value; it was using the unexpanded value.
5927 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5928 hadn't been configured. The fix is from Juergen Kreileder, who
5929 understands it better than I do:
5931 "Here's what I see happening with three configured cyrus_sasl
5932 authenticators configured (plain, login, cram-md5):
5934 On startup auth_cyrus_sasl_init() gets called for each of these.
5935 This means three calls to sasl_listmech() without a specified mech_list.
5936 => SASL tests which mechs of all available mechs actually work
5937 => three warnings about OTP not working
5938 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5940 With the patch, sasl_listmech() also gets called three times. But now
5941 SASL's mech_list option is set to the server_mech specified in the the
5942 authenticator. Or in other words, the answer from sasl_listmech()
5943 gets limited to just the mech you're testing for (which is different
5945 => the return list contains just 'plain' or 'login', 'cram-md5' or
5946 nothing depending on the value of ob->server_mech.
5948 I've just tested the patch: Authentication still works fine,
5949 unavailable mechs specified in the exim configuration are still
5950 caught, and the auth.log warnings about OTP are gone."
5952 PH/25 When debugging is enabled, the contents of the command line are added
5953 to the debugging output, even when log_selector=+arguments is not
5956 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5957 answer is "GNU", and only if the return is "GNU/something" is the answer
5960 PH/27 $acl_verify_message is now set immediately after the failure of a
5961 verification in an ACL, and so is available in subsequent modifiers. In
5962 particular, the message can be preserved by coding like this:
5964 warn !verify = sender
5965 set acl_m0 = $acl_verify_message
5967 Previously, $acl_verify_message was set only while expanding "message"
5968 and "log_message" when a very denied access.
5970 PH/28 Modified OS/os.c-Linux with
5972 -#ifndef OS_LOAD_AVERAGE
5973 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5975 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5976 nomenclature these days.)
5978 PH/29 Installed patch from the Sieve maintainer that adds the options
5979 sieve_useraddress and sieve_subaddress to the redirect router.
5981 PH/30 In these circumstances:
5982 . Two addresses routed to the same list of hosts;
5983 . First host does not offer TLS;
5984 . First host accepts first address;
5985 . First host gives temporary error to second address;
5986 . Second host offers TLS and a TLS session is established;
5987 . Second host accepts second address.
5988 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5989 and peerdn, if requested) that were in fact used only for the second
5992 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5993 attention to any local part prefix or suffix that was matched by the
5994 router that accepted the address. It now behaves in the same way as it
5995 does for delivery: the affixes are removed from the local part unless
5996 rcpt_include_affixes is set on the transport.
5998 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5999 timeout during the DATA phase of an incoming message.
6001 PH/33 Sieve envelope tests were broken for match types other than :is. I have
6002 applied a patch sanctioned by the Sieve maintainer.
6004 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
6005 the uid or gid is negative. A case of a negative gid caused this to be
6006 noticed. The fix allows for either to be negative.
6008 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
6009 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
6012 PH/36 The change PH/12 above was broken. Fixed it.
6014 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
6015 the grounds that routing the same address twice would always produce the
6016 same answer. This might have been true once, but it is certainly no
6017 longer true now. Routing a child address may depend on the previous
6018 routing that produced that child. Some complicated redirection strategies
6019 went wrong when messages had multiple recipients, and made Exim's
6020 behaviour dependent on the order in which the addresses were given.
6022 I have moved the duplicate checking until after the routing is complete.
6023 Exim scans the addresses that are assigned to local and remote
6024 transports, and removes any duplicates. This means that more work will be
6025 done, as duplicates will always all be routed, but duplicates are
6026 presumably rare, so I don't expect this is of any significance.
6028 For deliveries to pipes, files, and autoreplies, the duplicate checking
6029 still happens during the routing process, since they are not going to be
6032 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
6033 It corrects a timeout issue with spamd. This is Ian's comment: "The
6034 background is that sometimes spamd either never reads data from a
6035 connection it has accepted, or it never writes response data. The exiscan
6036 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
6037 blindly assumes that writes won't block so it may never time out."
6039 PH/39 Allow G after quota size as well as K and M.
6041 PH/40 The value set for $authenticated_id in an authenticator may not contain
6042 binary zeroes or newlines because the value is written to log lines and
6043 to spool files. There was no check on this. Now the value is run through
6044 the string_printing() function so that such characters are converted to
6045 printable escape sequences.
6047 PH/41 $message_linecount is a new variable that contains the total number of
6048 lines in the message. Compare $body_linecount, which is the count for the
6051 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6052 bounce and delay warning messages, except in certain special cases, which
6055 (a) An SMTP error message from a remote host;
6056 (b) A message specified in a :fail: redirection;
6057 (c) A message specified in a "fail" command in a system filter;
6058 (d) A message specified in a FAIL return from the queryprogram router;
6059 (e) A message specified by the cannot_route_message router option.
6061 In these cases only, Exim does include the error details in bounce and
6062 warning messages. There are also a few cases where bland messages such
6063 as "unrouteable address" or "local delivery error" are given.
6065 PH/43 $value is now also set for the "else" part of a ${run expansion.
6067 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6068 being worked on, but at least Exim now implements the latest version to
6071 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6072 process to complete was treated as a delivery failure, a timeout while
6073 writing the message to the pipe was logged, but erroneously treated as a
6074 successful delivery. Such timeouts include transport filter timeouts. For
6075 consistency with the overall process timeout, these timeouts are now
6076 treated as errors, giving rise to delivery failures by default. However,
6077 there is now a new Boolean option for the pipe transport called
6078 timeout_defer, which, if set TRUE, converts the failures into defers for
6079 both kinds of timeout. A transport filter timeout is now identified in
6082 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6083 systems where "make" and "gmake" are different, calling "gmake" at top
6084 level broke things. I've arranged for the value of $(MAKE) to be passed
6085 from the Makefile to this script so that it can call the same version of
6089 A note about Exim versions 4.44 and 4.50
6090 ----------------------------------------
6092 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6093 changes of various kinds. As a consequence, a big documentation update was
6094 needed. This delayed the release for rather longer than seemed good, especially
6095 in the light of a couple of (minor) security issues. Therefore, the changes
6096 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6097 release. So 4.44 and 4.50 are in effect two different branches that both start
6100 I have left the 4.50 change log unchanged; it contains all the changes since
6101 4.43. The change log for 4.44 is below; many of its items are identical to
6102 those for 4.50. This seems to be the most sensible way to preserve the
6103 historical information.
6109 1. Minor wording change to the doc/README.SIEVE file.
6111 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6112 computation of the current number of files was incorrect.
6114 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6115 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6118 4. Give more explanation in the error message when the command for a transport
6119 filter fails to execute.
6121 5. There are several places where Exim runs a non-Exim command in a
6122 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6123 was being done only for the command run by the queryprogram router. It is
6124 now done for all such subprocesses. The other cases are: ${run, transport
6125 filters, and the commands run by the lmtp and pipe transports.
6127 6. Added CONFIGURE_GROUP build-time option.
6129 7. Some older OS have a limit of 256 on the maximum number of file
6130 descriptors. Exim was using setrlimit() to set 1000 as a large value
6131 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6132 systems. I've change it so that if it can't get 1000, it tries for 256.
6134 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6135 was an oversight, and furthermore, ever since the addition of extra
6136 controls (e.g. 4.43/32), the checks on when to allow different forms of
6137 "control" were broken. There should now be diagnostics for all cases when a
6138 control that does not make sense is encountered.
6140 9. Added the /retain_sender option to "control=submission".
6142 10. $recipients is now available in the predata ACL (oversight).
6144 11. Tidy the search cache before the fork to do a delivery from a message
6145 received from the command line. Otherwise the child will trigger a lookup
6146 failure and thereby defer the delivery if it tries to use (for example) a
6147 cached ldap connection that the parent has called unbind on.
6149 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6150 of $address_data from the recipient verification was clobbered by the
6151 sender verification.
6153 13. The value of address_data from a sender verification is now available in
6154 $sender_address_data in subsequent conditions in the ACL statement.
6156 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6158 15. Added a new option "connect=<time>" to callout options, to set a different
6161 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6162 was its contents. (It was OK if the option was not defined at all.)
6164 17. A "Completed" log line is now written for messages that are removed from
6165 the spool by the -Mrm option.
6167 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6168 information about exactly what failed.
6170 19. Added -dd to debug only the daemon process.
6172 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6173 handles timeouts, both on the server side and network timeouts. Renamed the
6174 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6176 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6177 It is now set to "smtps".
6179 22. $host_address is now set to the target address during the checking of
6180 ignore_target_hosts.
6182 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6183 being passed; this would have caused $sender_host_name to have been used if
6184 matching the list had actually called for a host name (not very likely,
6185 since this list is usually IP addresses). A host name is now passed as
6188 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6189 code that specifies a non-restarting handler (typically sigaction() in
6190 modern systems) in an attempt to fix a rare and obscure crash bug.
6192 25. Narrowed the window for a race in the daemon that could cause it to ignore
6193 SIGCHLD signals. This is not a major problem, because they are used only to
6194 wake it up if nothing else does.
6196 26. A malformed maildirsize file could cause Exim to calculate negative values
6197 for the mailbox size or file count. Odd effects could occur as a result.
6198 The maildirsize information is now recalculated if the size or filecount
6201 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6202 support for a long time. Removed HAVE_SYS_VFS_H.
6204 28. Installed the latest version of exipick from John Jetmore.
6206 29. In an address list, if the pattern was not a regular expression, an empty
6207 subject address (from a bounce message) matched only if the pattern was an
6208 empty string. Non-empty patterns were not even tested. This was the wrong
6209 because it is perfectly reasonable to use an empty address as part of a
6210 database query. An empty address is now tested by patterns that are
6211 lookups. However, all the other forms of pattern expect the subject to
6212 contain a local part and a domain, and therefore, for them, an empty
6213 address still always fails if the pattern is not itself empty.
6215 30. Exim went into a mad DNS loop when attempting to do a callout where the
6216 host was specified on an smtp transport, and looking it up yielded more
6217 than one IP address.
6219 31. Re-factored the code for checking spool and log partition space into a
6220 function that finds that data and another that does the check. The former
6221 is then used to implement four new variables: $spool_space, $log_space,
6222 $spool_inodes, and $log_inodes.
6224 32. The RFC2047 encoding function was originally intended for short strings
6225 such as real names; it was not keeping to the 75-character limit for
6226 encoded words that the RFC imposes. It now respects the limit, and
6227 generates multiple encoded words if necessary. To be on the safe side, I
6228 have increased the buffer size for the ${rfc2047: expansion operator from
6231 33. It is now permitted to omit both strings after an "if" condition; if the
6232 condition is true, the result is "true". As before, when the second string
6233 is omitted, a false condition yields an empty string. This makes it less
6234 cumbersome to write custom ACL and router conditions.
6236 34. Failure to deliver a bounce message always caused it to be frozen, even if
6237 there was an errors_to setting on the router. The errors_to setting is now
6240 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6241 canonical form (fully expanded) before being placed in
6242 $sender_host_address.
6244 36. The table in the code that translates DNS record types into text (T_A to
6245 "A" for instance) was missing entries for NS and CNAME. It is just possible
6246 that this could have caused confusion if both these types were looked up
6247 for the same domain, because the text type is used as part of Exim's
6248 per-process caching. But the chance of anyone hitting this buglet seems
6251 37. The dnsdb lookup has been extended in a number of ways.
6253 (1) There is a new type, "zns", which walks up the domain tree until it
6254 finds some nameserver records. It should be used with care.
6256 (2) There is a new type, "mxh", which is like "mx" except that it returns
6257 just the host names, not the priorities.
6259 (3) It is now possible to give a list of domains (or IP addresses) to be
6260 looked up. The behaviour when one of the lookups defers can be
6261 controlled by a keyword.
6263 (4) It is now possible to specify the separator character for use when
6264 multiple records are returned.
6266 38. The dnslists ACL condition has been extended: it is now possible to supply
6267 a list of IP addresses and/or domains to be looked up in a particular DNS
6270 39. Added log_selector=+queue_time_overall.
6272 40. When running the queue in the test harness, wait just a tad after forking a
6273 delivery process, to get repeatability of debugging output.
6275 41. Include certificate and key file names in error message when GnuTLS fails
6276 to set them up, because the GnuTLS error message doesn't include the name
6277 of the failing file when there is a problem reading it.
6279 42. Allow both -bf and -bF in the same test run.
6281 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6283 44. The "Exiscan patch" is now merged into the mainline Exim source.
6285 45. Sometimes the final signoff response after QUIT could fail to get
6286 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6287 < 0 before doing a fflush(). This bug looks as though it goes back to the
6288 introduction of TLS in release 3.20, but "sometimes" must have been rare
6289 because the tests only now provoked it.
6291 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6292 (this can affect the format of dates).
6294 47. exim_tidydb, when checking for the continued existence of a message for
6295 which it has found a message-specific retry record, was not finding
6296 messages that were in split spool directories. Consequently, it was
6297 deleting retry records that should have stayed in existence.
6299 48. Steve fixed some bugs in eximstats.
6301 49. The SPA authentication driver was not abandoning authentication and moving
6302 on to the next authenticator when an expansion was forced to fail,
6303 contradicting the general specification for all authenticators. Instead it
6304 was generating a temporary error. It now behaves as specified.
6306 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6307 (the order specifies the preference for clients). The order is now AES256,
6308 AES128, 3DES, ARCFOUR128.
6310 51. Small patch to Sieve code - explicitly set From: when generating an
6313 52. Exim crashed if a remote delivery caused a very long error message to be
6314 recorded - for instance if somebody sent an entire SpamAssassin report back
6315 as a large number of 550 error lines. This bug was coincidentally fixed by
6316 increasing the size of one of Exim's internal buffers (big_buffer) that
6317 happened as part of the Exiscan merge. However, to be on the safe side, I
6318 have made the code more robust (and fixed the comments that describe what
6321 53. Now that there can be additional text after "Completed" in log lines (if
6322 the queue_time_overall log selector is set), a one-byte patch to exigrep
6323 was needed to allow it to recognize "Completed" as not the last thing in
6326 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6327 patch that reportedly fixes this has been added. I am not expert enough to
6328 create a test for it. This is what the patch creator wrote:
6330 "I found a little strange behaviour of ldap code when working with
6331 Windows 2003 AD Domain, where users was placed in more than one
6332 Organization Units. When I tried to give exim partial DN, the exit code
6333 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6334 But simultaneously result of request was absolutely normal ldap result,
6335 so I produce this patch..."
6337 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6338 REFERENCE, so I have modified the code to exclude the patch when that macro
6341 55. Some experimental protocols are using DNS PTR records for new purposes. The
6342 keys for these records are domain names, not reversed IP addresses. The
6343 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6344 leaves it alone. Component reversal etc. now happens only for IP addresses.
6347 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6349 57. Double the size of the debug message buffer (to 2048) so that more of very
6350 long debug lines gets shown.
6352 58. The exicyclog utility now does better if the number of log files to keep
6353 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6355 59. Two changes related to the smtp_active_hostname option:
6357 (1) $smtp_active_hostname is now available as a variable.
6358 (2) The default for smtp_banner uses $smtp_active_hostname instead
6359 of $primary_hostname.
6361 60. The host_aton() function is supposed to be passed a string that is known
6362 to be a valid IP address. However, in the case of IPv6 addresses, it was
6363 not checking this. This is a hostage to fortune. Exim now panics and dies
6364 if the condition is not met. A case was found where this could be provoked
6365 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6366 components; fortuitously, this particular loophole had already been fixed
6367 by change 4.50/55 above.
6369 If there are any other similar loopholes, the new check in host_aton()
6370 itself should stop them being exploited. The report I received stated that
6371 data on the command line could provoke the exploit when Exim was running as
6372 exim, but did not say which command line option was involved. All I could
6373 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6374 running as the user.
6377 61. There was a buffer overflow vulnerability in the SPA authentication code
6378 (which came originally from the Samba project). I have added a test to the
6379 spa_base64_to_bits() function which I hope fixes it.
6382 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6383 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6385 63. The daemon start-up calls getloadavg() while still root for those OS that
6386 need the first call to be done as root, but it missed one case: when
6387 deliver_queue_load_max is set with deliver_drop_privilege. This is
6388 necessary for the benefit of the queue runner, because there is no re-exec
6389 when deliver_drop_privilege is set.
6391 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6392 This has been fixed.
6394 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6395 was in use, was not putting the data itself into the right store pool;
6396 consequently, it could be overwritten for a subsequent message in the same
6397 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6400 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6402 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6403 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6404 the function were treating the return as a boolean value, which happened to
6405 work because 0=false and not-0=true, but is not correct code.
6407 68. The host_aton() function was not handling scoped IPv6 addresses (those
6408 with, for example, "%eth0" on the end) correctly.
6410 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6411 negated items (that is, ~something) in unsigned ints. Some compilers
6412 apparently mutter when there is no cast.
6414 70. If an address verification called from an ACL failed, and did not produce a
6415 user-specific message (i.e. there was only a "system" message), nothing was
6416 put in $acl_verify_message. In this situation, it now puts the system
6419 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6420 session; change 4.31/43 added the unwanted input to the log line - except
6421 that it did not do this in the start of session case. It now does.
6423 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6424 This is wrong and can cause the other end to generate a synchronization
6425 error if it is another Exim or anything else that does the synchronization
6426 check. A QUIT command is no longer sent after a timeout.
6428 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6429 during host lookups.
6431 74. The defer_ok option of callout verification was not working if it was used
6432 when verifying addresses in header lines, that is, for this case:
6434 verify = header_sender/callout=defer_ok
6436 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6437 those file descriptors could be used for SMTP connections. If anything
6438 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6439 could be sent to the SMTP client, causing chaos. The daemon now opens
6440 stdin, stdout, and stderr to /dev/null when it puts itself into the
6443 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6444 log by default. The user can override this with suitable Perl magic.
6446 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6447 the log message when discard triggers, was not working for the DATA ACL or
6448 for the non-SMTP ACL.
6450 78. Error message wording change in sieve.c.
6452 79. If smtp_accept_max_per_host was set, the number of connections could be
6453 restricted to fewer than expected, because the daemon was trying to set up
6454 a new connection before checking whether the processes handling previous
6455 connections had finished. The check for completed processes is now done
6456 earlier. On busy systems, this bug wouldn't be noticed because something
6457 else would have woken the daemon, and it would have reaped the completed
6460 80. If a message was submitted locally by a user whose login name contained one
6461 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6462 It caused a spool format error. I have fixed the spool reading code. A
6463 related problem was that the "from" clause in the Received: line became
6464 illegal because of the space(s). It is now covered by ${quote_local_part.
6466 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6469 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6471 83. Patch from Sieve maintainer to fix unterminated string problem in
6472 "vacation" handling.
6474 84. Some minor changes to the Linux configuration files to help with other
6475 OS variants using glibc.
6477 85. One more patch for Sieve to update vacation handling to latest spec.
6480 ----------------------------------------------------
6481 See the note above about the 4.44 and 4.50 releases.
6482 ----------------------------------------------------
6488 1. Change 4.43/35 introduced a bug that caused file counts to be
6489 incorrectly computed when quota_filecount was set in an appendfile
6492 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6493 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6496 3. Give more explanation in the error message when the command for a transport
6497 filter fails to execute.
6499 4. There are several places where Exim runs a non-Exim command in a
6500 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6501 was being done only for the command run by the queryprogram router. It is
6502 now done for all such subprocesses. The other cases are: ${run, transport
6503 filters, and the commands run by the lmtp and pipe transports.
6505 5. Some older OS have a limit of 256 on the maximum number of file
6506 descriptors. Exim was using setrlimit() to set 1000 as a large value
6507 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6508 systems. I've change it so that if it can't get 1000, it tries for 256.
6510 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6511 was an oversight, and furthermore, ever since the addition of extra
6512 controls (e.g. 4.43/32), the checks on when to allow different forms of
6513 "control" were broken. There should now be diagnostics for all cases when a
6514 control that does not make sense is encountered.
6516 7. $recipients is now available in the predata ACL (oversight).
6518 8. Tidy the search cache before the fork to do a delivery from a message
6519 received from the command line. Otherwise the child will trigger a lookup
6520 failure and thereby defer the delivery if it tries to use (for example) a
6521 cached ldap connection that the parent has called unbind on.
6523 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6524 of $address_data from the recipient verification was clobbered by the
6525 sender verification.
6527 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6528 was its contents. (It was OK if the option was not defined at all.)
6530 11. A "Completed" log line is now written for messages that are removed from
6531 the spool by the -Mrm option.
6533 12. $host_address is now set to the target address during the checking of
6534 ignore_target_hosts.
6536 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6537 being passed; this would have caused $sender_host_name to have been used if
6538 matching the list had actually called for a host name (not very likely,
6539 since this list is usually IP addresses). A host name is now passed as
6542 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6543 code that specifies a non-restarting handler (typically sigaction() in
6544 modern systems) in an attempt to fix a rare and obscure crash bug.
6546 15. Narrowed the window for a race in the daemon that could cause it to ignore
6547 SIGCHLD signals. This is not a major problem, because they are used only to
6548 wake it up if nothing else does.
6550 16. A malformed maildirsize file could cause Exim to calculate negative values
6551 for the mailbox size or file count. Odd effects could occur as a result.
6552 The maildirsize information is now recalculated if the size or filecount
6555 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6556 support for a long time. Removed HAVE_SYS_VFS_H.
6558 18. Updated exipick to current release from John Jetmore.
6560 19. Allow an empty sender to be matched against a lookup in an address list.
6561 Previously the only cases considered were a regular expression, or an
6564 20. Exim went into a mad DNS lookup loop when doing a callout where the
6565 host was specified on the transport, if the DNS lookup yielded more than
6568 21. The RFC2047 encoding function was originally intended for short strings
6569 such as real names; it was not keeping to the 75-character limit for
6570 encoded words that the RFC imposes. It now respects the limit, and
6571 generates multiple encoded words if necessary. To be on the safe side, I
6572 have increased the buffer size for the ${rfc2047: expansion operator from
6575 22. Failure to deliver a bounce message always caused it to be frozen, even if
6576 there was an errors_to setting on the router. The errors_to setting is now
6579 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6580 canonical form (fully expanded) before being placed in
6581 $sender_host_address.
6583 24. Updated eximstats to version 1.33
6585 25. Include certificate and key file names in error message when GnuTLS fails
6586 to set them up, because the GnuTLS error message doesn't include the name
6587 of the failing file when there is a problem reading it.
6589 26. Expand error message when OpenSSL has problems setting up cert/key files.
6592 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6593 (this can affect the format of dates).
6595 28. exim_tidydb, when checking for the continued existence of a message for
6596 which it has found a message-specific retry record, was not finding
6597 messages that were in split spool directories. Consequently, it was
6598 deleting retry records that should have stayed in existence.
6600 29. eximstats updated to version 1.35
6601 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6602 1.35 - bugfix such that pie charts by volume are generated correctly
6604 30. The SPA authentication driver was not abandoning authentication and moving
6605 on to the next authenticator when an expansion was forced to fail,
6606 contradicting the general specification for all authenticators. Instead it
6607 was generating a temporary error. It now behaves as specified.
6609 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6610 (the order specifies the preference for clients). The order is now AES256,
6611 AES128, 3DES, ARCFOUR128.
6613 31. Small patch to Sieve code - explicitly set From: when generating an
6616 32. Exim crashed if a remote delivery caused a very long error message to be
6617 recorded - for instance if somebody sent an entire SpamAssassin report back
6618 as a large number of 550 error lines. This bug was coincidentally fixed by
6619 increasing the size of one of Exim's internal buffers (big_buffer) that
6620 happened as part of the Exiscan merge. However, to be on the safe side, I
6621 have made the code more robust (and fixed the comments that describe what
6624 33. Some experimental protocols are using DNS PTR records for new purposes. The
6625 keys for these records are domain names, not reversed IP addresses. The
6626 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6627 leaves it alone. Component reversal etc. now happens only for IP addresses.
6630 34. The host_aton() function is supposed to be passed a string that is known
6631 to be a valid IP address. However, in the case of IPv6 addresses, it was
6632 not checking this. This is a hostage to fortune. Exim now panics and dies
6633 if the condition is not met. A case was found where this could be provoked
6634 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6635 components; fortuitously, this particular loophole had already been fixed
6636 by change 4.50/55 or 4.44/33 above.
6638 If there are any other similar loopholes, the new check in host_aton()
6639 itself should stop them being exploited. The report I received stated that
6640 data on the command line could provoke the exploit when Exim was running as
6641 exim, but did not say which command line option was involved. All I could
6642 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6643 running as the user.
6646 35. There was a buffer overflow vulnerability in the SPA authentication code
6647 (which came originally from the Samba project). I have added a test to the
6648 spa_base64_to_bits() function which I hope fixes it.
6651 36. The daemon start-up calls getloadavg() while still root for those OS that
6652 need the first call to be done as root, but it missed one case: when
6653 deliver_queue_load_max is set with deliver_drop_privilege. This is
6654 necessary for the benefit of the queue runner, because there is no re-exec
6655 when deliver_drop_privilege is set.
6657 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6658 was in use, was not putting the data itself into the right store pool;
6659 consequently, it could be overwritten for a subsequent message in the same
6660 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6663 38. Sometimes the final signoff response after QUIT could fail to get
6664 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6665 < 0 before doing a fflush(). This bug looks as though it goes back to the
6666 introduction of TLS in release 3.20, but "sometimes" must have been rare
6667 because the tests only now provoked it.
6673 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6674 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6675 Now it returns an integer. A number of calls were still expecting a T/F
6676 return. Fortuitously, in all cases, the tests worked in OK situations,
6677 which is the norm. However, things would have gone wrong on any write
6678 failures on the smtp file descriptor. This function is used when sending
6679 messages over SMTP and also when doing verify callouts.
6681 2. When Exim is called to do synchronous delivery of a locally submitted
6682 message (the -odf or -odi options), it no longer closes stderr before doing
6685 3. Implemented the mua_wrapper option.
6687 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6689 5. Implemented the functions header_remove(), header_testname(),
6690 header_add_at_position(), and receive_remove_recipient(), and exported them
6693 6. If an ACL "warn" statement specified the addition of headers, Exim already
6694 inserted X-ACL-Warn: at the start if there was no header name. However, it
6695 was not making this test for the second and subsequent header lines if
6696 there were newlines in the string. This meant that an invalid header could
6697 be inserted if Exim was badly configured.
6699 7. Allow an ACL "warn" statement to add header lines at the start or after all
6700 the Received: headers, as well as at the end.
6702 8. Added the rcpt_4xx retry error code.
6704 9. Added postmaster_mailfrom=xxx to callout verification option.
6706 10. Added mailfrom=xxxx to the callout verification option, for verify=
6709 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6710 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6712 12. Inserted some casts to stop certain compilers warning when using pointer
6713 differences as field lengths or precisions in printf-type calls (mostly
6714 affecting debugging statements).
6716 13. Added optional readline() support for -be (dynamically loaded).
6718 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6719 same clock tick as a message's arrival, so that its received time was the
6720 same as the "first fail" time on the retry record, and that message
6721 remained on the queue past the ultimate address timeout, every queue runner
6722 would try a delivery (because it was past the ultimate address timeout) but
6723 after another failure, the ultimate address timeout, which should have then
6724 bounced the address, did not kick in. This was a "< instead of <=" error;
6725 in most cases the first failure would have been in the next clock tick
6726 after the received time, and all would be well.
6728 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6729 being recognized when the domain list was tested by the match_domain
6730 condition in an expansion string.
6732 16. Added the ${str2b64: operator.
6734 17. Exim was always calling setrlimit() to set a large limit for the number of
6735 processes, without checking whether the existing limit was already
6736 adequate. (It did check for the limit on file descriptors.) Furthermore,
6737 errors from getrlimit() and setrlimit() were being ignored. Now they are
6738 logged to the main and panic logs, but Exim does carry on, to try to do its
6739 job under whatever limits there are.
6741 18. Imported PCRE 5.0.
6743 19. Trivial typo in log message " temporarily refused connection" (the leading
6746 20. If the log selector return_path_on_delivery was set and an address was
6747 redirected to /dev/null, the delivery process crashed because it assumed
6748 that a return path would always be set for a "successful" delivery. In this
6749 case, the whole delivery is bypassed as an optimization, and therefore no
6752 21. Internal re-arrangement: the function for sending a challenge and reading
6753 a response while authentication was assuming a zero-terminated challenge
6754 string. It's now changed to take a pointer and a length, to allow for
6755 binary data in such strings.
6757 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6759 23. Exim was not respecting finduser_retries when seeking the login of the
6760 uid under which it was called; it was always trying 10 times. (The default
6761 setting of finduser_retries is zero.) Also, it was sleeping after the final
6762 failure, which is pointless.
6764 24. Implemented tls_on_connect_ports.
6766 25. Implemented acl_smtp_predata.
6768 26. If the domain in control=submission is set empty, Exim assumes that the
6769 authenticated id is a complete email address when it generates From: or
6770 Sender: header lines.
6772 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6773 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6774 chown and chgrp in /bin and hostname in /usr/bin.
6776 28. Exim was keeping the "process log" file open after each use, just as it
6777 does for the main log. This opens the possibility of it remaining open for
6778 long periods when the USR1 signal hits a daemon. Occasional processlog
6779 errors were reported, that could have been caused by this. Anyway, it seems
6780 much more sensible not to leave this file open at all, so that is what now
6783 29. The long-running daemon process does not normally write to the log once it
6784 has entered its main loop, and it closes the log before doing so. This is
6785 so that log files can straightforwardly be renamed and moved. However,
6786 there are a couple of unusual error situations where the daemon does write
6787 log entries, and I had neglected to close the log afterwards.
6789 30. The text of an SMTP error response that was received during a remote
6790 delivery was being truncated at 512 bytes. This is too short for some of
6791 the long messages that one sometimes sees. I've increased the limit to
6794 31. It is now possible to make retry rules that apply only when a message has a
6795 specific sender, in particular, an empty sender.
6797 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6798 it possible to be selective about when SMTP synchronization is enforced.
6800 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6802 32. Implemented hosts_connection_nolog.
6804 33. Added an ACL for QUIT.
6806 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6809 35. Added mailbox_size and mailbox_filecount to appendfile.
6811 36. Added control = no_multiline_responses to ACLs.
6813 37. There was a bug in the logic of the code that waits for the clock to tick
6814 in the case where the clock went backwards by a substantial amount such
6815 that the microsecond fraction of "now" was more than the microsecond
6816 fraction of "then" (but the whole seconds number was less).
6818 38. Added support for the libradius Radius client library this is found on
6819 FreeBSD (previously only the radiusclient library was supported).
6825 1. When certain lookups returned multiple values in the form name=value, the
6826 quoting of the values was not always being done properly. Specifically:
6827 (a) If the value started with a double quote, but contained no whitespace,
6829 (b) If the value contained whitespace other than a space character (i.e.
6830 tabs or newlines or carriage returns) it was not quoted.
6831 This fix has been applied to the mysql and pgsql lookups by writing a
6832 separate quoting function and calling it from the lookup code. The fix
6833 should probably also be applied to nisplus, ibase and oracle lookups, but
6834 since I cannot test any of those, I have not disturbed their existing code.
6836 2. A hit in the callout cache for a specific address caused a log line with no
6837 reason for rejecting RCPT. Now it says "Previous (cached) callout
6838 verification failure".
6840 3. There was an off-by-one bug in the queryprogram router. An over-long
6841 return line was truncated at 256 instead of 255 characters, thereby
6842 overflowing its buffer with the terminating zero. As well as fixing this, I
6843 have increased the buffer size to 1024 (and made a note to document this).
6845 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6846 when Exim is waiting for an SMTP response from a remote server, Exim
6847 restarts its select() call on the socket, thereby resetting its timeout.
6848 This is not a problem when such interrupts are rare. Somebody set up a cron
6849 job to run exiwhat every 2 minutes, which is less than the normal select()
6850 timeout (5 or 10 minutes). This meant that the select() timeout never
6851 kicked in because it was always reset. I have fixed this by comparing the
6852 time when an interrupt arrives with the time at the start of the first call
6853 to select(). If more time than the timeout has elapsed, the interrupt is
6854 treated as a timeout.
6856 5. Some internal re-factoring in preparation for the addition of Sieve
6857 extensions (by MH). In particular, the "personal" test is moved to a
6858 separate function, and given an option for scanning Cc: and Bcc: (which is
6859 not set for Exim filters).
6861 6. When Exim created an email address using the login of the caller as the
6862 local part (e.g. when creating a From: or Sender: header line), it was not
6863 quoting the local part when it contained special characters such as @.
6865 7. Installed new OpenBSD configuration files.
6867 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6868 try to make them clearer.
6870 9. Callout options, other than the timeout value, were being ignored when
6871 verifying sender addresses in header lines. For example, when using
6873 verify = header_sender/callout=no_cache
6875 the cache was (incorrectly) being used.
6877 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6878 only the Cygwin environment.
6880 11. When return_path_on_delivery was set as a log selector, if different remote
6881 addresses in the same message used different return paths and parallel
6882 remote delivery occurred, the wrong values would sometimes be logged.
6883 (Whenever a remote delivery process finished, the return path value from
6884 the most recently started remote delivery process was logged.)
6886 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6887 lines when AUTH and/or TLS are in use. This is the "received protocol"
6888 field. Exim used to use "asmtp" for authenticated SMTP, without any
6889 indication (in the protocol name) for TLS use. Now it follows the RFC and
6890 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6891 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6892 names appear in log lines as well as in Received: header lines.
6894 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6895 extensions, and comparison tests, and to fix some bugs.
6897 14. Changes to the "personal" filter test:
6899 (1) The test was buggy in that it was just doing the equivalent of
6900 "contains" tests on header lines. For example, if a user's address was
6901 anne@some.where, the "personal" test would incorrectly be true for
6903 To: susanne@some.where
6905 This test is now done by extracting each address from the header in turn,
6906 and checking the entire address. Other tests that are part of "personal"
6907 are now done using regular expressions (for example, to check local parts
6908 of addresses in From: header lines).
6910 (2) The list of non-personal local parts in From: addresses has been
6911 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6912 taken from the Sieve specification recommendations.
6914 (3) If the message contains any header line starting with "List-" it is
6915 treated as non-personal.
6917 (4) The test for "circular" in the Subject: header line has been removed
6918 because it now seems ill-conceived.
6920 15. Minor typos in src/EDITME comments corrected.
6922 16. Installed latest exipick from John Jetmore.
6924 17. If headers_add on a router specified a text string that was too long for
6925 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6926 of string_sprintf() is now avoided.
6928 18. $message_body_size was not set (it was always zero) when running the DATA
6929 ACL and the local_scan() function.
6931 19. For the "mail" command in an Exim filter, no default was being set for
6932 the once_repeat time, causing a random time value to be used if "once" was
6933 specified. (If the value happened to be <= 0, no repeat happened.) The
6934 default is now 0s, meaning "never repeat". The "vacation" command was OK
6935 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6936 (I found it when inspecting the code).
6938 20. There is now an overall timeout for performing a callout verification. It
6939 defaults to 4 times the callout timeout, which applies to individual SMTP
6940 commands during the callout. The overall timeout applies when there is more
6941 than one host that can be tried. The timeout is checked before trying the
6942 next host. This prevents very long delays if there are a large number of
6943 hosts and all are timing out (e.g. when the network connections are timing
6944 out). The value of the overall timeout can be changed by specifying an
6945 additional sub-option for "callout", called "maxwait". For example:
6947 verify = sender/callout=5s,maxwait=20s
6949 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6950 to the end before writing, but this should make it even safer).
6952 22. Exim was forgetting that it had advertised PIPELINING for the second and
6953 subsequent messages on an SMTP connection. It was also not resetting its
6954 memory on STARTTLS and an internal HELO.
6956 23. When Exim logs an SMTP synchronization error within a session, it now
6957 records whether PIPELINING has been advertised or not.
6959 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6960 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6961 rather than long int.
6963 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6965 26. Added the never_mail option to autoreply.
6971 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6972 crash if the getsockname() call failed; this can happen if a connection is
6973 closed very soon after it is established. The problem was simply in the
6974 order in which certain operations were done, causing Exim to try to write
6975 to the SMTP stream before it had set up the file descriptor. The bug has
6976 been fixed by making things happen in the correct order.
6982 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6983 before the connection was closed, thus losing the rejection response.
6985 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6986 some early Solaris releases, but causes trouble in current releases where
6987 socklen_t is defined.
6989 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6992 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6995 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6996 that releasing the top of it at the end releases what was used for sub-
6997 expansions (unless the block got too big). However, discard this block if
6998 the first thing is a variable or header, so that we can use its block when
6999 it is dynamic (useful for very large $message_headers, for example).
7001 6. Lookups now cache *every* query, not just the most recent. A new, separate
7002 store pool is used for this. It can be recovered when all lookup caches are
7003 flushed. Lookups now release memory at the end of their result strings.
7004 This has involved some general refactoring of the lookup sources.
7006 7. Some code has been added to the store_xxx() functions to reduce the amount
7007 of flapping under certain conditions.
7009 8. log_incoming_interface used to affect only the <= reception log lines. Now
7010 it causes the local interface and port to be added to several more SMTP log
7011 lines, for example "SMTP connection from", and rejection lines.
7013 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
7015 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
7017 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
7018 could be overwritten at the end of the current message (or the start of a
7019 new message if it was set in a HELO ACL). The value is now preserved for
7020 the duration of the SMTP connection.
7022 12. If a transport had a headers_rewrite setting, and a matching header line
7023 contained an unqualified address, that address was qualified, even if it
7024 did not match any rewriting rules. The underlying bug was that the values
7025 of the flags that permit the existence of unqualified sender and recipient
7026 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
7027 non-local messages, and by -bnq for local messages) were not being
7028 preserved with the message after it was received.
7030 13. When Exim was logging an SMTP synchronization error, it could sometimes log
7031 "next input=" as part of the text comprising the host identity instead of
7032 the correct text. The code was using the same buffer for two different
7033 strings. However, depending on which order the printing function evaluated
7034 its arguments, the bug did not always show up. Under Linux, for example, my
7035 test suite worked just fine.
7037 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
7038 doesn't work with some older versions of Perl. It has been changed to "my",
7039 which in any case is probably the better facility to use.
7041 15. A really picky compiler found some instances of statements for creating
7042 error messages that either had too many or two few arguments for the format
7045 16. The size of the buffer for calls to the DNS resolver has been increased
7046 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7047 for addresses that have a lot of PTR records. This alleviates a problem; it
7048 does not fully solve it.
7050 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7051 buffer now truncates the list and logs the incident, which is the same
7052 action as happens when Exim is looking up a host name and its aliases.
7053 Previously in this situation something unpredictable would happen;
7054 sometimes it was "internal error: store_reset failed".
7056 18. If a server dropped the connection unexpectedly when an Exim client was
7057 using GnuTLS and trying to read a response, the client delivery process
7058 crashed while trying to generate an error log message.
7060 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7061 string, for example:
7063 warn message = H1: something\nH2: something
7065 the text was added as a single header line from Exim's point of view
7066 though it ended up OK in the delivered message. However, searching for the
7067 second and subsequent header lines using $h_h2: did not work. This has been
7068 fixed. Similarly, if a system filter added multiple headers in this way,
7069 the routers could not see them.
7071 20. Expanded the error message when iplsearch is called with an invalid key to
7072 suggest using net-iplsearch in a host list.
7074 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7075 ACLs are no longer actually imposed (and a message to that effect is
7078 22. If a "gecos" field in a passwd entry contained escaped characters, in
7079 particular, if it contained a \" sequence, Exim got it wrong when building
7080 a From: or a Sender: header from that name. A second bug also caused
7081 incorrect handling when an unquoted " was present following a character
7082 that needed quoting.
7084 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7085 was not being matched caselessly.
7087 24. Arranged for all hyphens in the exim.8 source to be escaped with
7090 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7091 properly. Recipient callout cache records were still being keyed to include
7092 the sender, even when use_sender was set false. This led to far more
7093 callouts that were necessary. The sender is no longer included in the key
7094 when use_sender is false.
7096 26. Added "control = submission" modifier to ACLs.
7098 27. Added the ${base62d: operator to decode base 62 numbers.
7100 28. dnsdb lookups can now access SRV records.
7102 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7103 the configuration file.
7105 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7106 (-v) mode. This makes the output for a verbose queue run more intelligible.
7108 31. Added a use_postmaster feature to recipient callouts.
7110 32. Added the $body_zerocount variable, containing the number of binary zero
7111 bytes in the message body.
7113 33. The time of last modification of the "new" subdirectory is now used as the
7114 "mailbox time last read" when there is a quota error for a maildir
7117 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7119 35. Added +ignore_unknown as a special item in host lists.
7121 36. Code for decoding IPv6 addresses in host lists is now included, even if
7122 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7123 address was recognized as an IP address, but was then not correctly decoded
7124 into binary, causing unexpected and incorrect effects when compared with
7131 1. Very minor rewording of debugging text in manualroute to say "list of
7132 hosts" instead of "hostlist".
7134 2. If verify=header_syntax was set, and a header line with an unqualified
7135 address (no domain) and a large number of spaces between the end of the
7136 name and the colon was received, the reception process suffered a buffer
7137 overflow, and (when I tested it) crashed. This was caused by some obsolete
7138 code that should have been removed. The fix is to remove it!
7140 3. When running in the test harness, delay a bit after writing a bounce
7141 message to get a bit more predictability in the log output.
7143 4. Added a call to search_tidyup() just before forking a reception process. In
7144 theory, someone could use a lookup in the expansion of smtp_accept_max_
7145 per_host which, without the tidyup, could leave open a database connection.
7147 5. Added the variables $recipient_data and $sender_data which get set from a
7148 lookup success in an ACL "recipients" or "senders" condition, or a router
7149 "senders" option, similar to $domain_data and $local_part_data.
7151 6. Moved the writing of debug_print from before to after the "senders" test
7154 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7155 problems for message scanning, either using a data ACL, or using
7156 local_scan() because the Received: header was not generated till after they
7157 were called (in order to set the time as the time of reception completion).
7158 I have revised the way this works. The header is now generated after the
7159 body is received, but before the ACL or local_scan() are called. After they
7160 are run, the timestamp in the header is updated.
7166 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7167 before starting a queue runner without re-exec. This happened only when
7168 deliver_drop_privilege was set or when the Exim user was set to root. The
7169 effect of the bug was that timeouts during subsequent deliveries caused
7170 crashes instead of being properly handled. The handler is now left at its
7171 default (and expected) setting.
7173 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7174 message, again when deliver_drop_privilege is set or Exim is run as root.
7175 The bug described in (1) was not present in this case, but the tidying up
7176 of the other signals was missing. I have made the two cases consistent.
7178 3. The ignore_target_hosts setting on a manualroute router was being ignored
7179 for hosts that were looked up using the /MX notation.
7181 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7184 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7185 operated on the sender address. After changing the $sender_address to <>
7186 for the sender address verify, Exim was re-instated it as the original
7187 (before rewriting) address, but remembering that it had rewritten it, so it
7188 wasn't rewriting it again. This bug also had the effect of breaking the
7189 sender address verification caching when the sender address was rewritten.
7191 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7192 This has been changed so that if the ip literal address matches
7193 ignore_target_hosts, the router declines.
7195 7. Added expansion conditions match_domain, match_address, and match_local_
7196 part (NOT match_host).
7198 8. The placeholder for the Received: header didn't have a length field set.
7200 9. Added code to Exim itself and to exim_lock to test for a specific race
7201 condition that could lead to file corruption when using MBX delivery. The
7202 issue is with the lockfile that is created in /tmp. If this file is removed
7203 after a process has opened it but before that process has acquired a lock,
7204 there is the potential for a second process to recreate the file and also
7205 acquire a lock. This could lead to two Exim processes writing to the file
7206 at the same time. The added code performs the same test as UW imapd; it
7207 checks after acquiring the lock that its file descriptor still refers to
7208 the same named file.
7210 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7211 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7214 11. Added the smtp_active_hostname option. If used, this will typically be made
7215 to depend on the incoming interface address. Because $interface_address is
7216 not set up until the daemon has forked a reception process, error responses
7217 that can happen earlier (such as "too many connections") no longer contain
7220 12. If an expansion in a condition on a "warn" statement fails because a lookup
7221 defers, the "warn" statement is abandoned, and the next ACL statement is
7222 processed. Previously this caused the whole ACL to be aborted.
7224 13. Added the iplsearch lookup type.
7226 14. Added ident_timeout as a log selector.
7228 15. Added tls_certificate_verified as a log selector.
7230 16. Added a global option tls_require_ciphers (compare the smtp transport
7231 option of the same name). This controls incoming TLS connections.
7233 17. I finally figured out how to make tls_require_ciphers do a similar thing
7234 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7235 before starting the TLS session.
7237 18. Tabs are now shown as \t in -bP output.
7239 19. If the log selector return_path_on_delivery was set, Exim crashed when
7240 bouncing a message because it had too many Received: header lines.
7242 20. If two routers both had headers_remove settings, and the first one included
7243 a superfluous trailing colon, the final name in the first list and the
7244 first name in the second list were incorrectly joined into one item (with a
7245 colon in the middle).
7251 1. Added -C and -D options to the exinext utility, mainly to make it easier
7252 to include in the automated testing, but these could be helpful when
7253 multiple configurations are in use.
7255 2. The exinext utility was not formatting the output nicely when there was
7256 an alternate port involved in the retry record key, nor when there was a
7257 message id as well (for retries that were specific to a specific message
7258 and a specific host). It was also confused by IPv6 addresses, because of
7259 the additional colons they contain. I have fixed the IPv4 problem, and
7260 patched it up to do a reasonable job for IPv6.
7262 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7263 delivery, the log line now contains "pipelined" if PIPELINING was used.
7265 4. An SMTP transport process used to panic and die if the bind() call to set
7266 an explicit outgoing interface failed. This has been changed; it is now
7267 treated in the same way as a connect() failure.
7269 5. A reference to $sender_host_name in the part of a conditional expansion
7270 that was being skipped was still causing a DNS lookup. This no longer
7273 6. The def: expansion condition was not recognizing references to header lines
7274 that used bh_ and bheader_.
7276 7. Added the _cache feature to named lists.
7278 8. The code for checking quota_filecount in the appendfile transport was
7279 allowing one more file than it should have been.
7281 9. For compatibility with Sendmail, the command line option
7289 and sets the incoming protocol and host name (for trusted callers). The
7290 host name and its colon can be omitted when only the protocol is to be set.
7291 Note the Exim already has two private options, -pd and -ps, that refer to
7292 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7293 "s", but I don't think that's a major issue.
7295 10. A number of refactoring changes to the code, none of which should affect
7298 (a) The number of logging options was getting close to filling up the
7299 32-bit word that was used as a bit map. I have split them into two classes:
7300 those that are passed in the argument to log_write(), and those that are
7301 only ever tested independently outside of that function. These are now in
7302 separate 32-bit words, so there is plenty of room for expansion again.
7303 There is no change in the user interface or the logging behaviour.
7305 (b) When building, for example, log lines, the code previously used a
7306 macro that called string_cat() twice, in order to add two strings. This is
7307 not really sufficiently general. Furthermore, there was one instance where
7308 it was actually wrong because one of the argument was used twice, and in
7309 one call a function was used. (As it happened, calling the function twice
7310 did not affect the overall behaviour.) The macro has been replaced by a
7311 function that can join an arbitrary number of extra strings onto a growing
7314 (c) The code for expansion conditions now uses a table and a binary chop
7315 instead of a serial search (which was left over from when there were very
7316 few conditions). Also, it now recognizes conditions like "pam" even when
7317 the relevant support is not compiled in: a suitably worded error message is
7318 given if an attempt is made to use such a condition.
7320 11. Added ${time_interval:xxxxx}.
7322 12. A bug was causing one of the ddress fields not to be passed back correctly
7323 from remote delivery subprocesses. The field in question was not being
7324 subsequently used, so this caused to problems in practice.
7326 13. Added new log selectors queue_time and deliver_time.
7328 14. Might have fixed a bug in maildirsizefile handling that threw up
7329 "unexpected character" debug warnings, and recalculated the data
7330 unnecessarily. In any case, I expanded the warning message to give more
7333 15. Added the message "Restricted characters in address" to the statements in
7334 the default ACL that block characters like @ and % in local parts.
7336 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7337 Three changes have been made:
7339 (a) There was a serious bug; a negative response to MAIL caused the whole
7340 recipient domain to be cached as invalid, thereby blocking all messages
7341 to all local parts at the same domain, from all senders. This bug has
7342 been fixed. The domain is no longer cached after a negative response to
7343 MAIL if the sender used is not empty.
7345 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7348 (c) A new callout option, "use_sender" has been added for people who want
7349 the modified behaviour.
7355 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7358 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7359 indeed breaks things for older releases.
7361 3. Added additional logging to the case where there is a problem reading data
7362 from a filter that is running in a subprocess using a pipe, in order to
7363 try to track down a specific problem.
7365 4. Testing facility fudge: when running in the test harness and attempting
7366 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7367 getting "No route to host". Convert this to a timeout.
7369 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7372 6. Some OS don't have socklen_t but use size_t instead. This affects the
7373 fifth argument of getsockopt() amongst other things. This is now
7374 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7375 can be set for individual OS. I have set it for SunOS5, OSF1, and
7376 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7377 some earlier ones do not.
7379 7. Change 4.30/15 was not doing the test caselessly.
7381 8. The standard form for an IPv6 address literal was being rejected by address
7382 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7383 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7384 this, as well as the form without the "IPv6" on the front (but only when
7385 address literals are enabled, of course).
7387 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7389 10. Exim crashed if a message with an empty sender address specified by -f
7390 encountered a router with an errors_to setting. This could be provoked only
7391 by a command such as
7395 where an empty string was supplied; "<>" did not hit this bug.
7397 11. Installed PCRE release 4.5.
7399 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7400 remained set. It is now erased.
7402 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7403 times from message ids (which are base 36 rather than the normal 62).
7405 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7406 were being counted as actual protocol errors, and logged if the log
7407 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7408 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7409 and DATA following a set of rejected RCPTs do not count as protocol errors.
7410 In other words, Exim assumes they were pipelined, though this may not
7411 actually be the case. Of course, in all cases the client gets an
7412 appropriate error code.
7414 15. If a lookup fails in an ACL condition, a message about the failure may
7415 be available; it is used if testing the ACL cannot continue, because most
7416 such messages specify what the cause of the deferral is. However, some
7417 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7418 that caused an old message to be retained and used if a later statement
7419 caused a defer, replacing the real cause of the deferral.
7421 16. If an IP address had so many PTR records that the DNS lookup buffer
7422 was not large enough to hold them, Exim could crash while trying to process
7423 the truncated data. It now detects and logs this case.
7425 17. Further to 4.21/58, another change has been made: if (and only if) the
7426 first line of a message (the first header line) ends with CRLF, a bare LF
7427 in a subsequent header line has a space inserted after it, so as not to
7428 terminate the header.
7430 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7431 unnecessarily, used atoi() instead of strtol(), and didn't check the
7432 termination when getting file sizes from file names by regex.
7434 19. Completely re-implemented the support for maildirsize files, in the light
7435 of a number of problems with the previous contributed implementation
7436 (4.30/29). In particular:
7438 . If the quota is zero, the maildirsize file is maintained, but no quota is
7441 . If the maildir directory does not exist, it is created before any attempt
7442 to write a maildirsize file.
7444 . The quota value in the file is just a cache; if the quota is changed in
7445 the transport, the new value overrides.
7447 . A regular expression is available for excluding directories from the
7450 20. The autoreply transport checks the characters in options that define the
7451 message's headers; it allows continued headers, but it was checking with
7452 isspace() after an embedded newline instead of explicitly looking for a
7455 21. If all the "regular" hosts to which an address was routed had passed their
7456 expiry times, and had not reached their retry times, the address was
7457 bounced, even if fallback hosts were defined. Now Exim should go on to try
7460 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7461 equivalent code in the SMTP transport. Some hosts send humungous responses
7462 to HELO/EHLO, more than 1024 it seems.
7464 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7465 gives compiler warnings in some environments. I've now done it "properly",
7468 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7469 (because of problems with the built-in one) was declared to return uschar *
7470 instead of char *, causing compiler failure.
7472 25. Fixed a file descriptor leak when processing alias/forward files.
7474 26. Fixed a minor format string issue in dbfn.c.
7476 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7478 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7479 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7482 29. When a sender address is verified, it is cached, to save repeating the test
7483 when there is more than one recipient in a message. However, when the
7484 verification involves a callout, it is possible for different callout
7485 options to be set for different recipients. It is too complicated to keep
7486 track of this in the cache, so now Exim always runs a verification when a
7487 callout is required, relying on the callout cache for the optimization.
7488 The overhead is duplication of the address routing, but this should not be
7491 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7492 to be verified with callout=postmaster, and the main callout worked but the
7493 postmaster check failed, the verification correctly failed. However, if a
7494 subsequent RCPT command asked for sender verification *without* the
7495 postmaster check, incorrect caching caused this verification also to fail,
7498 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7499 it was not caching the DNS options (qualify_single, search_parents) that
7500 were used when the lookup failed. A subsequent lookup with different
7501 options therefore always gave the same answer, though there were cases
7502 where it should not have. (Example: a "domains = !$mx_any" option on a
7503 dnslookup router: the "domains" option is always processed without any
7504 widening, but the router might have qualify_single set.) Now Exim uses the
7505 cached value only when the same options are set.
7507 32. Added John Jetmore's "exipick" utility to the distribution.
7509 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7510 than a timeout (e.g. a certificate is required, and is not provided), an
7511 Exim server now closes the connection immediately. Previously it waited for
7512 the client to close - but if the client is SSL, it seems that they each
7513 wait for each other, leading to a delay before one of them times out.
7515 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7516 maintained 0.8.x compatibility because I don't think many are using it, and
7517 it is clearly obsolete.
7519 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7522 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7523 client certificate was expired. A simple patch fixes this, though I don't
7524 understand the full logic of why the verify callback is called multiple
7527 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7528 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7529 which causes problems with some clients (such as the Certicom SSL Plus
7530 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7531 disables the coutermeasure allowing Eudora to connect."
7533 38. Exim was not checking that a write() to a log file succeeded. This could
7534 lead to Bad Things if a log got too big, in particular if it hit a file
7535 size limit. Exim now panics and dies if it cannot write to a log file, just
7536 as it does if it cannot open a log file.
7538 39. Modified OS/Makefile-Linux so that it now contains
7540 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7542 The two -D definitions ensure that Exim is compiled with large file
7543 support, which makes it possible to handle log files that are bigger than
7546 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7547 instance) a domain was checked against a named list that involved a lookup,
7548 causing $domain_data to be set, then another domain was checked against the
7549 same list, then the first domain was re-checked, the value of $domain_data
7550 after the final check could be wrong. In particular, if the second check
7551 failed, it could be set empty. This bug probably also applied to
7554 41. The strip_trailing_dot option was not being applied to the address given
7555 with the -f command-line option.
7557 42. The code for reading a message's header from the spool was incrementing
7558 $received_count, but never initializing it. This meant that the value was
7559 incorrect (doubled) while delivering a message in the same process in which
7560 it was received. In the most common configuration of Exim, this never
7561 happens - a fresh exec is done - but it can happen when
7562 deliver_drop_privilege is set.
7564 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7565 it now includes up to 150 characters of the unexpected data in the log
7568 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7569 and building data strings. The size of both of these buffers was 10 000
7570 bytes - far larger than anybody would *ever* want, thought I. Needless to
7571 say, somebody hit the limit. I have increased the maximum line length to
7572 20 000 and the maximum data length of concatenated lines to 100 000. I have
7573 also fixed two bugs, because there was no checking on these buffers. Tsk,
7574 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7575 buffer is too small.
7577 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7578 lsearch lookups. Now it does.
7580 46. When parsing a route_list item in a manualroute router, a fixed-length
7581 buffer was used for the list of hosts. I made this 1024 bytes long,
7582 thinking that nobody would ever have a list of hosts that long. Wrong.
7583 Somebody had a whole pile of complicated expansion conditions, and the
7584 string was silently truncated, leading to an expansion error. It turns out
7585 that it is easier to change to an unlimited length (owing to other changes
7586 that have happened since this code was originally written) than to build
7587 structure for giving a limitation error. The length of the item that
7588 expands into the list of hosts is now unlimited.
7590 47. The lsearch lookup could not handle data where the length of text line was
7591 more than 4095 characters. Such lines were truncated, leading to shortened
7592 data being returned. It should now handle lines of any length.
7594 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7595 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7598 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7599 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7600 no longer happens in comment lines. A list of replacements is now placed
7601 at the head of all of the source files, except those whose only change is
7602 to replace PERL_COMMAND in the very first #! line.
7604 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7605 messages on the queue, with a bottom-up merge sort, using code contributed
7606 by Michael Haardt. This should make operations like -bp somewhat faster on
7607 large queues. It won't affect queue runners, except when queue_run_in_order
7610 51. Installed eximstats 1.31 in the distribution.
7612 52. Added support for SRV lookups to the dnslookup router.
7614 53. If an ACL referred to $message_body or $message_body_end, the value was not
7615 reset for any messages that followed in the same SMTP session.
7617 54. The store-handling optimization for building very long strings was not
7618 differentiating between the different store pools. I don't think this
7619 actually made any difference in practice, but I've tidied it.
7621 55. While running the routers to verify a sender address, $sender_address
7622 was still set to the sender address. This is wrong, because when routing to
7623 send a bounce to the sender, it would be empty. Therefore, I have changed
7624 it so that, while verifying a sender address, $sender_address is set to <>.
7625 (There is no change to what happens when verifying a recipient address.)
7627 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7628 target A or AAAA records (if not already returned) without resetting the
7629 qualify_single or search_parents options of the DNS resolver. These are
7630 inappropriate in this case because the targets of MX and SRV records must
7631 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7632 target that, when qualified, matched something in the local domain. These
7633 two options are now turned off when doing these lookups.
7635 57. It seems that at least some releases of Reiserfs (which does not have the
7636 concept of a fixed number of inodes) returns zero and not -1 for the
7637 number of available inodes. This interacted badly with check_spool_inodes,
7638 which assumed that -1 was the "no such thing" setting. What I have done is
7639 to check that the total number of inodes is greater than zero before doing
7640 the test of how many are available.
7642 58. When a "warn" ACL statement has a log_message modifier, the message is
7643 remembered, and not repeated. This is to avoid a lot of repetition when a
7644 message has many recipients that cause the same warning to be written.
7645 However, Exim was preserving the list of already written lines for an
7646 entire SMTP session, which doesn't seem right. The memory is now reset if a
7647 new message is started.
7649 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7650 debugging output unless log_rewrite was also set.
7652 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7653 of (int)(handle) when we know that handle contains (void *)(-1).
7655 61. The Exim daemon panic-logs an error return when it closes the incoming
7656 connection. However "connection reset by peer" seems to be common, and
7657 isn't really an error worthy of noting specially, so that particular error
7660 62. When Exim is trying to find all the local interfaces, it used to panic and
7661 die if the ioctl to get the interface flags failed. However, it seems that
7662 on at least one OS (Solaris 9) it is possible to have an interface that is
7663 included in the list of interfaces, but for which you get a failure error
7664 for this call. This happens when the interface is not "plumbed" into a
7665 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7666 failure of the "get flags" call assumes that the interface is down.
7668 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7669 makes life easier for people who are doing arithmetic on fields extracted
7670 from dates, where you often get leading zeros that should not be
7671 interpreted as octal.
7673 64. Added qualify_domain to the redirect router, to override the global
7676 65. If a pathologically long header line contained very many addresses (the
7677 report of this problem mentioned 10 000) and each of them was rewritten,
7678 Exim could use up a very large amount of memory. (It kept on making new
7679 copies of the header line as it rewrote, and never released the old ones.)
7680 At the expense of a bit more processing, the header rewriting function has
7681 been changed so that it no longer eats memory in this way.
7683 66. The generation of the Received: header has been moved from the time that a
7684 message starts to be received, to the time that it finishes. The timestamp
7685 in the Received: header should now be very close to that of the <= log
7686 line. There are two side-effects of this change:
7688 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7689 logged header lines no longer include the local Received: line, because
7690 it has not yet been created. The same applies to a copy of the message
7691 that is returned to a non-SMTP sender when a message is rejected.
7693 (b) When a filter file is tested using -bf, no additional Received: header
7694 is added to the test message. After some thought, I decided that this
7697 This change does not affect the value of $received_for. It is still set
7698 after address rewriting, but before local_scan() is called.
7700 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7702 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7703 gave an unhelpful panic error message, and a defer error. I have managed to
7704 change this behaviour so that it now rejects any supplied certificate,
7705 which seems right, as the list of acceptable certificates is empty.
7707 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7708 gave an unhelpful defer error. I have not managed to make this reject any
7709 supplied certificates, but the error message it gives is "no certificate
7710 supplied", which is not helpful.
7712 70. exigrep's output now also includes lines that are not associated with any
7713 message, but which match the given pattern. Implemented by a patch from
7714 Martin Sluka, which also tidied up the Perl a bit.
7716 71. Recipient callout verification, like sender verification, was using <> in
7717 the MAIL FROM command. This isn't really the right thing, since the actual
7718 sender may affect whether the remote host accepts the recipient or not. I
7719 have changed it to use the actual sender in the callout; this means that
7720 the cache record is now keyed on a recipient/sender pair, not just the
7721 recipient address. There doesn't seem to be a real danger of callout loops,
7722 since a callout by the remote host to check the sender would use <>.
7723 [SEE ABOVE: changed after hitting problems.]
7725 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7726 temporary errors. However, in the case of such a code being given after
7727 the end of a data transmission (i.e. after ".") Exim was failing to write
7728 a retry record for the message. (Yes, there was some broken host that was
7729 actually sending 8xx at this point.)
7731 73. An unknown lookup type in a host list could cause Exim to panic-die when
7732 the list was checked. (An example that provoked this was putting <; in the
7733 middle of a list instead of at the start.) If this happened during a DATA
7734 ACL check, a -D file could be left lying around. This kind of configuration
7735 error no longer causes Exim to die; instead it causes a defer error. The
7736 incident is still logged to the main and panic logs.
7738 74. Buglet left over from Exim 3 conversion. The message "too many messages
7739 in one connection" was written to the rejectlog but not the mainlog, except
7740 when address rewriting (yes!) was being logged.
7742 75. Added write_rejectlog option.
7744 76. When a system filter was run not as root (that is, when system_filter_user
7745 was set), the values of the $n variables were not being returned to the
7746 main process; thus, they were not subsequently available in the $sn
7749 77. Added +return_path_on_delivery log selector.
7751 78. A connection timeout was being treated differently from recipients deferred
7752 when testing hosts_max_try with a message that was older than the host's
7753 retry timeout. (The host should not be counted, thus allowing all hosts to
7754 be tried at least once before bouncing.) This may have been the cause of an
7755 occasionally reported bug whereby a message would remain on the queue
7756 longer than the retry timeout, but would be bounced if a delivery was
7757 forced. I say "may" because I never totally pinned down the problem;
7758 setting up timeout/retry tests is difficult. See also the next item.
7760 79. The ultimate address timeout was not being applied to errors that involved
7761 a combination of host plus message (for example, a timeout on a MAIL
7762 command). When an address resolved to a number of possible hosts, and they
7763 were not all tried for each delivery (e.g. because of hosts_max_try), a
7764 message could remain on the queue longer than the retry timeout.
7766 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7769 81. Fixed an obscure SMTP outgoing bug which required at least the following
7770 conditions: (a) there was another message waiting for the same server;
7771 (b) the server returned 5xx to all RCPT commands in the first message so
7772 that the message was not completed; (c) the server dropped the connection
7773 or gave a negative response to the RSET that Exim sends to abort the
7774 transaction. The observed case was a dropped connection after DATA that had
7775 been sent in pipelining mode. That is, the server had advertised PIPELINING
7776 but was not implementing it correctly. The effect of the bug was incorrect
7777 behaviour, such as trying another host, and this could lead to a crash.
7783 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7784 and daemon.c were passed as pointers to ints; they should have been
7785 pointers to socklen_t variables (which are typically unsigned ints).
7787 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7790 3. Fixed a really odd bug that affected only the testing scheme; patching a
7791 certain fixed string in the binary changed the value of another string that
7792 happened to be identical to the end of the original first string.
7794 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7795 name", it returns that address as the IP address. On some operating
7796 systems (e.g. Solaris), it also passes back the IP address string as the
7797 "host name". However, on others (e.g. Linux), it passes back an empty
7798 string. Exim wasn't checking for this, and was changing the host name to an
7799 empty string, assuming it had been canonicalized.
7801 5. Although rare, it is permitted to have more than one PTR record for a given
7802 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7803 all the names associated with an address, because they do in Solaris.
7804 However, it seems that they do not in Linux for data that comes from the
7805 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7806 I found this out when I moved to a new Linux workstation and tried to run
7807 the Exim test suite.
7809 To get round this problem I have changed the code so that it now does its
7810 own call to the DNS to look up PTR records when searching for a host name.
7811 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7812 addresses that are only in /etc/hosts are still found.
7814 This behaviour is, however, controlled by an option called host_lookup_
7815 order, which defaults to "bydns:byaddr". If people want to use the other
7816 order, or indeed, just use one or the other means of lookup, they can
7817 specify it in this variable.
7819 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7820 some operating systems, this comes back from gethostbyaddr() as an empty
7821 string, and this is what Exim used to test for. However, it seems that in
7822 other systems, "." is yielded. Exim now tests for this case too.
7824 7. The values of check_spool_space and check_log_space are now held internally
7825 as a number of kilobytes instead of an absolute number of bytes. If a
7826 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7827 kilobyte. This means that much larger values can be stored.
7829 8. Exim monitor: an attempt to get the action menu when not actually pointing
7830 at a message produces an empty menu entitled "No message selected". This
7831 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7832 no entries in it ("Shell widget menu has zero width and/or height"). So I
7833 have added a single, blank menu entry in this case.
7835 9. Added ${quote_local_part.
7837 10. MIME decoding is now applied to the contents of Subject: header lines when
7840 11. Now that a reference to $sender_host_address automatically causes a reverse
7841 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7842 host lookup before query-style lookups in lists that might use this
7843 variable. This has therefore been abolished, and the "net-" prefix is no
7844 longer necessary for query-style lookups.
7846 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7847 have been a typo for LFLAGS, so it has been changed.
7849 13. The install script calls Exim with "-C /dev/null" in order to find the
7850 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7851 to be output. However, since Exim outputs its version number before the
7852 error, it didn't break the script. It just looked ugly. I fixed this by
7853 always allowing "-C /dev/null" if the caller is root.
7855 14. Ignore overlarge ACL variable number when reading spool file - insurance
7856 against a later release with more variables having written the file.
7858 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7859 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7860 this, as well as the form without the "IPv6" on the front.
7862 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7863 OS/Makefile-Darwin file.
7865 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7866 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7868 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7869 variable. However, some OS use ints for inodes. I've added cast to long int
7870 to get rid of the compiler warning.
7872 19. I had forgotten to lock out "/../" in configuration file names when
7873 ALT_CONFIG_PREFIX was set.
7875 20. Routers used for verification do not need to specify transports. However,
7876 if such a router generated a host list, and callout was configured, Exim
7877 crashed, because it could not find a port number from the (non-existent)
7878 transport. It now assumes port 25 in this circumstance.
7880 21. Added the -t option to exigrep.
7882 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7883 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7884 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7885 them is set, LOOKUP_LSEARCH is forced.
7887 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7889 24. Added sender and host information to the "rejected by local_scan()" log
7890 line; previously there was no indication of these.
7892 25. Added .include_if_exists.
7894 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7895 Linux. It turns out that not all file systems support this. Apparently some
7896 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7897 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7898 not supported on the file descriptor, is now ignored when Exim is trying to
7899 sync a directory. This applies only to Linux.
7901 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7903 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7904 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7907 29. Added support for maildirsize files from supplied patch (modified a bit).
7909 30. The use of :fail: followed by an empty string could lead Exim to respond to
7910 sender verification failures with (e.g.):
7912 550 Verification failed for <xxx>
7913 550 Sender verify failed
7915 where the first response line was missing the '-' that indicates it is not
7916 the final line of the response.
7918 31. The loop for finding the name of the user that called Exim had a hardwired
7919 limit of 10; it now uses the value of finduser_retries, which is used for
7920 all other user lookups.
7922 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7925 33. Exim was neglecting to zero errno before one call of strtol() when
7926 expanding a string and expecting an integer value. On some systems this
7927 resulted in spurious "integer overflow" errors. Also, it was casting the
7928 result into an int without checking.
7930 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7931 did not work. The code looks as if it has *never* worked, though it appears
7932 to have been documented since at least release 1.62. I have made it work.
7934 35. The "timeout_DNS" error in retry rules, also documented since at least
7935 1.62, also never worked. As it isn't clear exactly what this means, and
7936 clearly it isn't a major issue, I have abolished the feature by treating it
7937 as "timeout", and writing a warning to the main and panic logs.
7939 36. The display of retry rules for -brt wasn't always showing the error code
7942 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7943 timeout_connect_A, timeout_connect_MX.
7945 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7946 to the empty sender.
7948 39. The daemon was not analysing the content of -oX till after it had closed
7949 stderr and disconnected from the controlling terminal. This meant that any
7950 syntax errors were only noted on the panic log, and the return code from
7951 the command was 0. By re-arranging the code a little, I've made the
7952 decoding happen first, so such errors now appear on stderr, and the return
7953 code is 1. However, the actual setting up of the sockets still happens in
7954 the disconnected process, so errors there are still only recorded on the
7957 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7958 connections (as happens on some IP stacks) was logged at start up time as
7959 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7960 it from "IPv6 and IPv4", which means that two separate sockets are being
7963 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7964 says whether AF_INET or AF_INET6 was passed as an argument.
7966 42. Exiwhat output was messed up when time zones were included in log
7969 43. Exiwhat now gives more information about the daemon's listening ports,
7970 and whether -tls-on-connect was used.
7972 44. The "port" option of the smtp transport is now expanded.
7974 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7975 silently ignored. Now an error message is written to the main and panic
7978 46. There's a new ACL modifier called "logwrite" which writes to a log file
7979 as soon as it is encountered.
7981 47. Added $local_user_uid and $local_user_gid at routing time.
7983 48. Exim crashed when trying to verify a sender address that was being
7986 49. Exim was recognizing only a space character after ".include". It now also
7987 recognizes a tab character.
7989 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7990 extracting the relevant information from the specification. The man page no
7991 longer contains scrambled data for the -d option, and I've added a section
7992 at the front about calling Exim under different names.
7994 51. Added "extra_headers" argument to the "mail" command in filter files.
7996 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7999 53. Installed eximstats 1.29.
8001 54. Added transport_filter_timeout as a generic transport option.
8003 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
8004 Cc: header lines. This was required by RFC 822, but it not required by RFC
8007 56. Exim used to add From:, Date:, and Message-Id: header lines to any
8008 incoming messages that did not have them. Now it does so only if the
8009 message originates locally, that is, if there is no associated remote host
8010 address. When Resent- header lines are present, this applies to the Resent-
8011 lines rather than the non-Resent- lines.
8013 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
8014 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
8016 58. Messages for configuration errors now include the name of the main
8017 configuration file - useful now that there may be more than one file in a
8018 list (.included file names were always shown).
8020 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
8021 for those rare installations that do not start the daemon as root or run it
8022 setuid root. I've cut out the call to initgroups() if the daemon is not
8025 60. The Exim user and group can now be bound into the binary as text strings
8026 that are looked up at the start of Exim's processing.
8028 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
8030 62. Added $mailstore_basename variable.
8032 63. Installed patch to sieve.c from Michael Haardt.
8034 64. When Exim failed to open the panic log after failing to open the main log,
8035 the original message it was trying to log was written to stderr and debug
8036 output, but if they were not available (the usual case in production), it
8037 was lost. Now it is written to syslog before the two lines that record the
8038 failures to open the logs.
8040 65. Users' Exim filters run in subprocesses under the user's uid. It is
8041 possible for a "deliver" command or an alias in a "personal" command to
8042 provoke an address rewrite. If logging of address rewriting is configured,
8043 this fails because the process is not running as root or exim. There may be
8044 a better way of dealing with this, but for the moment (because 4.30 needs
8045 to be released), I have disabled address rewrite logging when running a
8046 filter in a non-root, non-exim process.
8052 1. The buildconfig auxiliary program wasn't quoting the value set for
8053 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8054 not defined. This bug was masked in 4.22 by the effect that was fixed in
8057 2. Some messages that were rejected after a message id was allocated were
8058 shown as "incomplete" by exigrep. It no longer does this for messages that
8059 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8061 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8062 have allow_domain_literals set, the ID did not get logged in the <= line.
8063 Domain literals are now always recognized in Message-ID: header lines.
8065 4. The first argument for a ${extract expansion item is the key name or field
8066 number. Leading and trailing spaces in this item were not being ignored,
8067 causing some misleading effects.
8069 5. When deliver_drop_privilege was set, single queue runner processes started
8070 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8071 same command in the process it spins off) were not dropping privilege.
8073 6. When the daemon running as "exim" started a queue runner, it always
8074 re-executed Exim in the spun-off process. This is a waste of effort when
8075 deliver_drop_privilege is set. The new process now just calls the
8076 queue-runner function directly.
8082 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8085 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8086 ignored. Though the use of -oP was forcing the writing of a pid file, it
8087 was always written to the default place.
8089 3. If the message "no IP address found for host xxxx" is generated during
8090 incoming verification, it is now followed by identification of the incoming
8091 connection (so you can more easily find what provoked it).
8093 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8095 5. Added some features to "harden" Exim a bit more against certain attacks:
8097 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8098 be put in Local/Makefile. This is like the never_users runtime option,
8099 but it cannot be overridden. The default setting is "root".
8101 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8102 prefix string with which any file named in a -C command line option
8105 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8106 is retained for -C and -D only if the caller of Exim is root. Without
8107 it, the exim user may also use -C and -D and retain privilege.
8109 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8110 command line option is disabled.
8112 6. Macro names set by the -D option must start with an upper case letter, just
8113 like macro names defined in the configuration file.
8115 7. Added "dereference=" facility to LDAP.
8117 8. Two instances of the typo "uknown" in the source files are fixed.
8119 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8120 the Configure-Makefile script screwed up while processing it.
8122 10. Incorporated PCRE 4.4.
8124 11. The SMTP synchronization check was not operating right at the start of an
8125 SMTP session. For example, it could not catch a HELO sent before the client
8126 waited for the greeting. There is now a check for outstanding input at the
8127 point when the greeting is written. Because of the duplex, asynchronous
8128 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8129 way, but not yet received, when the check is performed.
8131 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8132 on TCP/IP sockets, because this apparently causes some broken clients to
8135 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8136 unchanged) from the Cygwin maintainer.
8138 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8139 was supported instead of testing for mbx. Effectively a typo.
8141 15. The spa authenticator server code was not checking that the input it
8142 received was valid base64.
8144 16. The debug output line for the "set" modifier in ACLs was not showing the
8145 name of the variable that was being set.
8147 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8149 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8150 lookup on its own. Something else was needed to trigger the lookup. For
8151 example, a match in host_lookup or the need for a host name in a host list.
8152 Now, if $sender_host_name is referenced and the host name has not yet been
8153 looked up, a lookup is performed. If the lookup fails, the variable remains
8154 empty, and $host_lookup_failed is set to "1".
8156 19. Added "eqi" as a case-independent comparison operator.
8158 20. The saslauthd authentication condition could segfault if neither service
8159 nor realm was specified.
8161 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8162 error message that was logged was misleading, and incoming SMTP
8163 connections were dropped. The message is now more accurate, and temporary
8164 errors are given to SMTP connections.
8166 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8167 (except RSET) with a 421 error, until QUIT is received. However, it was
8168 failing to send a response to QUIT.
8170 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8171 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8172 ACL is now run after the helo_try_verify_hosts code.
8174 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8175 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8176 case-independent, so other case variants are also recognized). Apparently
8177 some systems use these upper case variants.
8179 25. If more than two messages were waiting for the same host, and a transport
8180 filter was specified for the transport, Exim sent two messages over the
8181 same TCP/IP connection, and then failed with "socket operation on non-
8182 socket" when it tried to send the third.
8184 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8186 27. The extern definition of crypt16() in expand.c was not being excluded when
8187 the OS had its own crypt16() function.
8189 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8190 as a preferred synonym for return_size_limit, both as an option and as an
8193 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8195 30. Changed the default configuration ACL to relax the local part checking rule
8196 for addresses that are not in any local domains. For these addresses,
8197 slashes and pipe symbols are allowed within local parts, but the sequence
8198 /../ is explicitly forbidden.
8200 31. SPA server authentication was not clearing the challenge buffer before
8203 32. log_message in a "warn" ACL statement was writing to the reject log as
8204 well as to the main log, which contradicts the documentation and doesn't
8205 seem right (because no rejection is happening). So I have stopped it.
8207 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8208 However, I am unable to do any testing of this.
8210 34. Fixed an infelicity in the appendfile transport. When checking directories
8211 for a mailbox, to see if any needed to be created, it was accidentally
8212 using path names with one or more superfluous leading slashes; tracing
8213 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8215 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8216 contents are added to the log line that is written for every discarded
8217 recipient. (Previously a log_message setting was ignored.)
8219 36. The ${quote: operator now quotes the string if it is empty.
8221 37. The install script runs exim in order to find its version number. If for
8222 some reason other than non-existence or emptiness, which it checks, it
8223 could not run './exim', it was installing it with an empty version number,
8224 i.e. as "exim-". This error state is now caught, and the installation is
8227 38. An argument was missing from the function that creates an error message
8228 when Exim fails to connect to the socket for saslauthd authentication.
8229 This could cause Exim to crash, or give a corrupted message.
8231 39. Added isip, isip4, and isip6 to ${if conditions.
8233 40. The ACL variables $acl_xx are now saved with the message, and can be
8234 accessed later in routers, transports, and filters.
8236 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8237 strings in the file are not string-expanded.
8239 42. If a MAIL command specified a SIZE value that was too large to fit into an
8240 int variable, the check against message_size_limit failed. Such values are
8241 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8242 day this will have to be increased, but I don't think I want to be around
8243 when emails are that large.
8250 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8251 iconv() is not standard in FreeBSD.
8253 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8254 IPv6 enabled. The observed symptom was a segmentation fault on return from
8255 the function os_common_find_running_interfaces() in src/os.c.
8257 3. In the check_special_case() function in daemon.c I had used "errno" as an
8258 argument name, which causes warnings on some systems. This was basically a
8259 typo, since it was named "eno" in the comments!
8261 4. The code that waits for the clock to tick (at a resolution of some fraction
8262 of a second) so as to ensure message-id uniqueness was always waiting for
8263 at least one whole tick, when it could have waited for less. [This is
8264 almost certainly not relevant at current processor speeds, where it is
8265 unlikely to ever wait at all. But we try to future-proof.]
8267 5. The function that sleeps for a time interval that includes fractions of a
8268 second contained a race. It did not block SIGALRM between setting the
8269 timer, and suspending (a couple of lines later). If the interval was short
8270 and the sigsuspend() was delayed until after it had expired, the suspension
8271 never ended. On busy systems this could lead to processes getting stuck for
8274 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8275 process, before it forks any delivery processes. The open lookup caching
8276 mechanism meant that the open file or database connection was passed into
8277 the delivery process. The problem was that delivery processes always tidy
8278 up cached lookup data. This could cause a problem for the next delivery
8279 process started by the queue runner, because the external queue runner
8280 process does not know about the closure. So the next delivery process
8281 still has data in the lookup cache. In the case of a file lookup, there was
8282 no problem because closing a file descriptor in a subprocess doesn't affect
8283 the parent. However, if the lookup was caching a connection to a database,
8284 the connection was closed, and the second delivery process was likely to
8285 see errors such as "PGSQL: query failed: server closed the connection
8286 unexpectedly". The problem has been fixed by closing all cached lookups
8287 in a queue runner before running a delivery process.
8289 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8290 seem to have the "const" qualifier which it has on other OS. I've
8293 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8294 *of the same type* (client or server) with the same public name that an
8295 error should be diagnosed.
8297 9. When Exim looked up a host name for an IP address, but failed to find the
8298 original IP address when looking up the host name (a safety check), it
8299 output the message "<ip address> does not match any IP for NULL", which was
8300 confusing, to say the least. The bug was that the host name should have
8301 appeared instead of "NULL".
8303 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8304 user that is built into the binary, and the -C or -D options is used, root
8305 privilege is dropped before the configuration file is read. In addition,
8306 logging is switched to stderr instead of the normal log files. If the
8307 configuration then re-defines the Exim user, the unprivileged environment
8308 is probably not what is expected, so Exim logs a panic warning message (but
8311 However, if deliver_drop_privilege is set, the unprivileged state may well
8312 be exactly what is intended, so the warning has been cut out in that case,
8313 and Exim is allowed to try to write to its normal log files.
8319 1. smtp_return_error_details was not giving details for temporary sender
8320 or receiver verification errors.
8322 2. Diagnose a configuration error if two authenticators have the same public
8325 3. Exim used not to create the message log file for a message until the first
8326 delivery attempt. This could be confusing when incoming messages were held
8327 for policy or load reasons. The message log file is now created at the time
8328 the message is received, and an initial "Received" line is written to it.
8330 4. The automatically generated man page for command line options had a minor
8331 bug that caused no ill effects; however, a more serious problem was that
8332 the procedure for building the man page automatically didn't always
8333 operate. Consequently, release 4.20 contains an out-of-date version. This
8334 shouldn't happen again.
8336 5. When building Exim with embedded Perl support, the script that builds the
8337 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8338 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8340 6. The freeze_tell option was not being used for messages that were frozen on
8341 arrival, either by an ACL or by local_scan().
8343 7. Added the smtp_incomplete_transaction log selector.
8345 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8346 was accepting AUTH without a new EHLO.
8348 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8349 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8352 10. Logging of TCP/IP connections (when configured) now happens in the main
8353 daemon process instead of the child process, so that the TCP/IP connection
8354 count is more accurate (but it can never be perfect).
8356 11. The use of "drop" in a nested ACL was not being handled correctly in the
8357 outer ACL. Now, if condition failure induced by the nested "drop" causes
8358 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8359 or "require"), the connection is dropped.
8361 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8362 that yield "discard" can now be used with an "accept" or a "discard" verb,
8363 but an error is generated for any others (because I can't see a useful way
8364 to define what should happen).
8366 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8367 are now processed in the same way as lines in the Exim configuration file.
8368 In particular, continuation lines are supported.
8370 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8372 15. Added -ti meaning -t -i.
8374 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8375 domains, and warn by logging if others are found.
8377 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8378 returned from GIFCONF when Exim is trying to find the list of interfaces on
8379 a host. The code in os.c has been modified to copy each ifreq to an aligned
8380 structure in all cases.
8382 Also, in some cases, the returned ifreq's were being copied to a 'struct
8383 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8384 means the last couple of bytes of an IPv6 address could be chopped if the
8385 ifreq contained only a normal sockaddr (14 bytes storage).
8387 18. Named domain lists were not supported in the hosts_treat_as_local option.
8388 An entry such as +xxxx was not recognized, and was treated as a literal
8391 19. Ensure that header lines added by a DATA ACL are included in the reject log
8392 if the ACL subsequently rejects the message.
8394 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8395 MD5 (which is deprecated).
8397 21. When testing a filter file using -bf, Exim was writing a message when it
8398 took the sender from a "From " line in the message, but it was not doing so
8399 when it took $return_path from a Return-Path: header line. It now does.
8401 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8402 with a valid header line field name (a series of printing characters
8403 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8405 23. Changed "disc" in the source to "disk" to conform to the documentation and
8406 the book and for uniformity.
8408 24. Ignore Sendmail's -Ooption=value command line item.
8410 25. When execve() failed while trying to run a command in a pipe transport,
8411 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8412 could be confused with a return value of 69 from the command itself. This
8413 has been changed to 127, the value the shell returns if it is asked to run
8414 a non-existent command. The wording for the related log line suggests a
8415 non-existent command as the problem.
8417 26. If received_header_text expands to an empty string, do not add a Received:
8418 header line to the message. (Well, it adds a token one on the spool, but
8419 marks it "old" so that it doesn't get used or transmitted.)
8421 27. Installed eximstats 1.28 (addition of -nt option).
8423 28. There was no check for failure on the call to getsockname() in the daemon
8424 code. This can fail if there is a shortage of resources on the system, with
8425 ENOMEM, for example. A temporary error is now given on failure.
8427 29. Contrary to the C standard, it seems that in some environments, the
8428 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8429 program. Exim now does this explicitly; it affects the formatting of
8430 timestamps using strftime().
8432 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8433 complaints. I've now initialized all the variables, to avoid this.
8435 32. Header lines added by a system filter were not being "seen" during
8436 transport-time rewrites.
8438 33. The info_callback() function passed to OpenSSL is set up with type void
8439 (*)(SSL *, int, int), as described somewhere. However, when calling the
8440 function (actually a macro) that sets it up, the type void(*)() is
8441 expected. I've put in a cast to prevent warnings from picky compilers.
8443 34. If a DNS black list lookup found a CNAME record, but there were no A
8444 records associated with the domain it pointed at, Exim crashed.
8446 35. If a DNS black list lookup returned more than one A record, Exim ignored
8447 all but the first. It now scans all returned addresses if a particular IP
8448 value is being sought. In this situation, the contents of the
8449 $dnslist_value variable are a list of all the addresses, separated by a
8452 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8453 to accept a host name and all its aliases if the forward lookup for any of
8454 them yielded the IP address of the incoming connection. Now it accepts only
8455 those names whose forward lookup yields the correct IP address. Any other
8456 names are discarded. This closes a loophole whereby a rogue DNS
8457 administrator could create reverse DNS records to break through a
8458 wildcarded host restriction in an ACL.
8460 37. If a user filter or a system filter that ran in a subprocess used any of
8461 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8462 the wrong values were passed to the pipe command ($thisaddress had the
8463 value of $0, $0 had the value of $1, etc). This bug was introduced by
8464 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8466 38. Improved the line breaking for long SMTP error messages from ACLs.
8467 Previously, if there was no break point between 40 and 75 characters, Exim
8468 left the rest of the message alone. Two changes have been made: (a) I've
8469 reduced the minimum length to 35 characters; (b) if it can't find a break
8470 point between 35 and 75 characters, it looks ahead and uses the first one
8471 that it finds. This may give the occasional overlong line, but at least the
8472 remaining text gets split now.
8474 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8475 file descriptors might be low, and that setting 1000 would always raise it.
8476 It turns out that in some environments, the limit is already over 1000 and
8477 that lowering it causes trouble. So now Exim takes care not to decrease it.
8479 40. When delivering a message, the value of $return_path is set to $sender_
8480 address at the start of routing (routers may change the value). By an
8481 oversight, this default was not being set up when an address was tested by
8482 -bt or -bv, which affected the outcome if any router or filter referred to
8485 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8486 log only when "message" or "log_message" are set. However, if one of the
8487 conditions was an address verification, or a call to a nested ACL, the
8488 messages generated by the underlying test were being passed through. This
8489 no longer happens. The underlying message is available in $acl_verify_
8490 message for both "message" and "log_message" expansions, so it can be
8491 passed through if needed.
8493 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8494 new expansion $bh_ to give the encoded byte string without charset
8495 translation. Translation happens only if iconv() is available; HAVE_ICONV
8496 indicates this at build time. HEADERS_CHARSET gives the charset to
8497 translate to; headers_charset can change it in the configuration, and
8498 "headers charset" can change it in an individual filter file.
8500 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8501 that creates RFC 2047 encoded "words" labels them as that charset instead
8502 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8503 expansion operator; (ii) when Exim creates a From: line for a local
8504 message; (iii) when a header line is rewritten to include a "phrase" part.
8506 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8507 buggy, causing it to skip the first lines of messages whose message ID
8508 ended in 'D'. This would not have bitten before Exim release 4.14, because
8509 message IDs were unlikely to end in 'D' before then. The effect was to have
8510 incorrect size information for certain domains.
8512 45. #include "config.h" was missing at the start of the crypt16.c module. This
8513 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8516 46. If there was a timeout during a "random" callout check, Exim treated it as
8517 a failure of the random address, and carried on sending RSET and the real
8518 address. If the delay was just some slowness somewhere, the response to the
8519 original RCPT would be taken as a response to RSET and so on, causing
8520 mayhem of various kinds.
8522 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8523 when I implemented it. It didn't allow for the fact that some option values
8524 may legitimately be negative (e.g. size_addition), and it didn't even do
8525 the right test for positive values.
8527 48. Domain names in DNS records are case-independent. Exim always looks them up
8528 in lower case. Some resolvers return domain names in exactly the case they
8529 appear in the zone file, that is, they may contain uppercase letters. Not
8530 all resolvers do this - some return always lower case. Exim was treating a
8531 change of case by a resolver as a change of domain, similar to a widening
8532 of a domain abbreviation. This triggered its re-routing code and so it was
8533 trying to route what was effectively the same domain again. This normally
8534 caused routing to fail (because the router wouldn't handle the domain
8535 twice). Now Exim checks for this case specially, and just changes the
8536 casing of the domain that it ultimately uses when it transmits the message
8539 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8542 50. If a filter generated a file delivery with a non-absolute name (possible if
8543 no home directory exists for the router), the forbid_file option was not
8546 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8547 the existing equality matching.
8549 52. Exim was using ints instead of ino_t variables in some places where it was
8550 dealing with inode numbers.
8552 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8553 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8554 called TMPDIR, and if it finds it is different, it changes its value.
8556 54. The smtp_printf() function is now made available to local_scan() so
8557 additional output lines can be written before returning. There is also an
8558 smtp_fflush() function to enable the detection of a dropped connection.
8559 The variables smtp_input and smtp_batched_input are exported to
8562 55. Changed the default runtime configuration: the message "Unknown user"
8563 has been removed from the ACL, and instead placed on the localuser router,
8564 using the cannot_route_message feature. This means that any verification
8565 failures that generate their own messages won't get overridden. Similarly,
8566 the "Unrouteable address" message that was in the ACL for unverifiable
8567 relay addresses has also been removed.
8569 56. Added hosts_avoid_esmtp to the smtp transport.
8571 57. The exicyclog script was not checking for the esoteric option
8572 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8573 will work only if exicyclog is run under the appropriate euid.
8575 58. Following a discussion on the list, the rules by which Exim recognises line
8576 endings on incoming messages have been changed. The -dropcr and drop_cr
8577 options are now no-ops, retained only for backwards compatibility. The
8578 following line terminators are recognized: LF CRLF CR. However, special
8579 processing applies to CR:
8581 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8582 nor a local message in the state where . is a terminator.
8584 (ii) If a bare CR is encountered in a header line, an extra space is added
8585 after the line terminator so as not to end the header. The reasoning
8586 behind this is that bare CRs in header lines are most likely either
8587 to be mistakes, or people trying to play silly games.
8589 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8590 was being incorrectly given as 18 bytes larger than it should have been.
8591 This is a VOB (very old bug).
8593 60. This may never have affected anything current, but just in case it has:
8594 When the local host is found other than at the start of a list of hosts,
8595 the local host, those with the same MX, and any that follow, are discarded.
8596 When the list in question was part of a longer list of hosts, the following
8597 hosts (not currently being processed) were also being discarded. This no
8598 longer happens. I'm not sure if this situation could ever has previously
8601 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8604 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8605 header. This is something that is recommended in a new Internet Draft, and
8606 is something that is documented as being done by Sendmail. There are two
8607 possible values. For messages generated by the autoreply transport, Exim
8610 Auto-Submitted: auto-replied
8612 whereas for all other generated messages (e.g. bounces) it adds
8614 Auto-Submitted: auto-generated
8616 63. The "personal" condition in filters now includes a test for the
8617 Auto-Submitted: header. If it contains the string "auto-" the message it
8618 not considered personal.
8620 64. Added rcpt_include_affixes as a generic transport option.
8622 65. Added queue_only_override (default true).
8624 66. Added the syslog_duplication option.
8626 67. If what should have been the first header line of a message consisted of
8627 a space followed by a colon, Exim was mis-interpreting it as a header line.
8628 It isn't of course - it is syntactically invalid and should therefore be
8629 treated as the start of the message body. The misbehaviour could have
8630 caused a number of strange effects, including loss of data in subsequent
8631 header lines, and spool format errors.
8633 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8634 client host had authenticated. This control can now be exercised by an ACL
8635 for more flexibility.
8637 69. By default, callouts do not happen when testing with -bh. There is now a
8638 variant, -bhc, which does actually run the callout code, including
8639 consulting and updating the callout cache.
8641 70. Added support for saslauthd authentication, courtesy of Alexander
8644 71. If statvfs() failed on the spool or log directories while checking their
8645 size for availability, Exim confusingly gave the error "space shortage".
8646 Furthermore, in debugging mode it crashed with a floating point exception.
8647 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8648 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8649 serious problem, Exim now writes to the main and panic logs when this
8650 happens, with details of the failure. It then refuses to accept the
8651 incoming message, giving the message "spool directory problem" or "log
8652 directory problem" with a 421 code for SMTP messages.
8654 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8655 0, 1, and 2 exist, because some OS complain for execs without them (see
8656 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8657 descriptors. However, the code omitted to check that the open succeeded,
8658 causing mysterious errors if for some reason the permissions on /dev/null
8659 got screwed. Now Exim writes a message to the main and panic logs, and
8660 bombs out if it can't open /dev/null.
8662 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8663 interact so that it is all more flexible. It is supposed to remain
8664 backwards compatible. Also added extra_local_interfaces.
8666 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8667 to bomb out with an assertion failure - to the client this appears as a
8668 connection drop. This problem occurs in the part of the code that was taken
8669 from the Samba project. Fortunately, the assertion is in a very simple
8670 function, so I have fixed this by reproducing the function inline in the
8671 one place where it is called, and arranging for authentication to fail
8672 instead of killing the process with assert().
8674 75. The SPA client code was not working when the server requested OEM rather
8675 than Unicode encoding.
8677 76. Added code to make require_files with a specific uid setting more usable in
8678 the case where statting the file as root fails - usually a non-root-mounted
8679 NFS file system. When this happens and the failure is EACCES, Exim now
8680 forks a subprocess and does the per-uid checking as the relevant uid.
8682 77. Added process_log_path.
8684 78. If log_file_path was not explicitly set, a setting of check_log_space or
8685 check_log_inodes was ignored.
8687 79. If a space check for the spool or log partitions fails, the incident is now
8688 logged. Of course, in the latter case the data may get lost...
8690 80. Added the %p formatting code to string_format() so that it can be used to
8691 print addresses in debug_print(). Adjusted all the address printing in the
8692 debugging in store.c to use %p rather than %d.
8694 81. There was a concern that a line of code in smtp_in.c could overflow a
8695 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8696 initially expressed, the concern was not well-founded, because trailing
8697 spaces are removed early. However, if the trailing spaces were followed by
8698 a NULL, they did not get removed, so the overflow was possible. Two fixes
8701 (a) I re-wrote the offending code in a cleaner fashion.
8702 (b) If an incoming SMTP command contains a NULL character, it is rejected
8705 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8706 runs initgroups(), so that if the Exim user is in any additional groups,
8707 they will be used during message reception.
8713 The change log for 4.20 and earlier releases has been archived.