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.
43 JH/01 Support list of dkim results in the dkim_status ACL condition, making
44 it more usable in the data ACL.
46 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
47 Previously This was only logged, on the assumption that errors would be
48 seen for a previous fflush(). However, a fuse filesystem has been
49 reported as showing this an error for the fclose(). The spool is now in
50 an uncertain state, and we have logged and responded acceptance. Change
51 this to respond with a temp-reject, wipe spoolfiles, and log the error
54 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
55 during a recipient verify callout, a QUIT command was attempted on the
56 now-closed callout channel, causing a paniclog entry.
58 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
59 a connection_reject log_selector, under tls_on_connect. Previously
60 with this combination, when the connect ACL rejected, a spurious
61 paniclog entry was made.
63 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
64 of loadbalancer-detection for resumption, in 4.96 - which tries to
65 use the EHLO response. SMTPS does not have one at the time it is starting
66 TLS. Change the default for the smtp transport host_name_extract option
67 to be a static string, for TLS-on-connect cases; meaning that resumption
68 will always be attempted (unless deliberately overriden).
70 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
71 chunk-separator specification. This was broken by hardening introduced
74 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
75 included the -H with the id; this also messed up exiqgrep.
77 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
78 was not properly skipped and empty elements would cause mis-parsing.
79 Tighten parsing of DKIM header records. Previously, all but lowercase
80 alpha chars would be ignored in potential tag names.
82 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
83 being searched. Previously we only had one for IPv4 addresses. Per the
84 documentation, the error results by default in a no-match result for the
85 list. It is logged if the unknown_in_list log_selector is used.
87 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
88 the routing operation. Previously it would silently stop routing the
91 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
92 info-request event close in time to a scheduled run timer could result in
93 the latter being missed, and no further queue scheduled runs being
94 initiated. This ouwld be more likely on high-load systems.
96 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
97 LF-only mode (as detected from the first header line). Previously we did
98 accept that in (normal) CRLF mode; this has been raised as a possible
99 attack scenario (under the name "smtp smuggling").
101 JH/13 Add an fdatasync call for the received message data file in spool, before
102 loggging reception and sending the SMTP ack. Previously we only flushed
103 the stdio buffer so there was still the possibility of a disk error.
105 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
106 address. Previously, for the last address in a header line (commonly
107 there is only one) the terminating newline was part of the logged
110 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
111 header, when parsing for address-qualification. Previously one was only
112 written if there were rewrite rules.
114 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
117 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
118 the multiple-queue-runners facility for 4.97 broke this, giving only a
119 one-time run of the queue.
121 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
124 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
125 TLS session resulted in a forced-fail, a misleading error was logged for
126 the expansino of tls_certificates. This would affect the common case of
127 that option being set (main-section options) but not having any variable
128 parts. It could also potentially affect tls_privatekeys. The underlyding
129 coding errors go back to 4.90 but were only exposed in 4.97.
131 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
132 pcre2 library starting allocating 20kB rather than 112 bytes per match
133 call, which broke the 2GB total limitation on Exim's memory management
134 when a user had over 104207 messages stored and the appendfile
135 maildir_quota_directory_regex option is in use. Release the allocated
136 memory every thosand files to avoid this.
137 The same issue arises with the ACL regex condition, which is applied
138 to every line of a received message.
140 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
141 which all recipients had been handled (itself an issue) a null-pointer
142 deref was done on trying to write a retry record. Fix that by counting
143 the outstanding recipients before trying to transmit the message.
144 The situation arose for a second MX try within a transport run, when the
145 first had perm-rejected a recipient (the only one for the connection, in
146 the case seen) during pipelining, and then closed the TCP connection.
147 The transport classified that as an I/O error, leaving the message
148 outstanding but having marked up the recipient as dealt-with. It then
149 tried another MX because of the I/O error. Fix this by converting the
150 message-level status to ok if there was a close but all recipients were
151 dealt with. Thanks to Wolfgand Breyha for debug runs.
153 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
154 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
156 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
158 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
159 option specified a fixed address, later rewriting on that address would
160 trip on the configuration data being readonly. Instead of modifying
161 in-place, copy data. Found and fixed by Peter Benie.
163 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
164 data a null pointer was followed. Find and testcase by Sebastian Bugge.
166 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
167 decimal 127 chars were not encoded, and lowercase hex was used for
168 encoded values. Outstanding since at least 1999.
170 JH/27 Fix crash in logging. When a message with a large number of recipients
171 had been received, and logging of recipients is enabled, the buffer used
172 for logging could reach limit. A read using a null pointer would then
173 be done, resulting in a crash of the receiving process before an SMTP
174 ACK for the message was returned to the sending system. Duplicate
175 messages were created as a result.
176 Find and debug help by Mateusz Krawczyk
178 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
179 DB, wrapping transport record bare-ip "host names" and ipv6
180 "host addresses" in square-brackets. This makes the parsing that
181 exinext does more reliable.
183 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
186 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
188 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
189 ipv6 addresses for the sender. Previously the uncompressed form was used,
190 and if used in textual form this would result in behavior difference
193 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
194 now classed as a protocol error and subject to smtp_max_synprot_errors.
196 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
197 ".." and has following characters.
199 JH/34 Fix delivery ordering for 2-phase queue run combined with
202 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
203 Previously the $mime_filename variable would have an incorrect value.
204 While in the code, extend coverage to name= which previously was only
205 supported for single parameters, despite also filling in $mime_filename.
211 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
212 SMTP connection" log lines.
214 JH/02 Option default value updates:
215 - queue_fast_ramp (main) true (was false)
216 - remote_max_parallel (main) 4 (was 2)
218 JH/03 Cache static regex pattern compilations, for use by ACLs.
220 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
221 Make the rewrite never match and keep the logging. Trust the
222 admin to be using verify=header-syntax (to actually reject the message).
224 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
225 (under Linux) we watch the dir containing the final file; previously
226 it would be the dir with the first symlink. We still do not monitor
229 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
230 dn_expand() is happy to pass them through.
232 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
233 the file with the proof had an unchanged name, the new proof(s) were
234 loaded on top of the old ones (and nover used; the old ones were stapled).
236 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
237 more than one message arrived in a single connection a reference from
238 the earlier message could be re-used. Often a sigsegv resulted.
239 These variables were introduced in Exim 4.87.
240 Debug help from Graeme Fowler.
242 JH/09 Fix ${filter } for conditions that modify $value. Previously the
243 modified version would be used in construction the result, and a memory
246 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
247 Find and fix by Jasen Betts.
249 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
250 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
251 the systemwide configuration to override the Exim config.
253 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
254 API changes in libopendmarc.
256 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
257 pid 1, in the normal "background daemon" mode, having to drop process-
258 group leadership also lost track of needing to create listener sockets.
260 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
261 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
263 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
264 a capture group which obtained no text (eg. "(abc)*" matching zero
265 occurrences) could cause a segfault if the corresponding $<n> was
268 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
269 included a close-brace character (eg. it itself used an expansion) an
272 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
273 starting TLS. Previously it was after, meaning that attackers on such
274 ports had to be screened using the host_reject_connection main config
275 option. The new sequence aligns better with the STARTTLS behaviour, and
276 permits defences against crypto-processing load attacks, even though it
277 is strictly an incompatible change.
278 Also, avoid sending any SMTP fail response for either the connect ACL
279 or host_reject_connection, for TLS-on-connect ports.
281 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
282 Previously this was not permitted, but it makes reasonable sense.
283 While there, restore a restriction on using it from a connect ACL; given
284 the change JH/16 it could only return false (and before 4.91 was not
287 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
288 was exactly sized compared to the log buffer, a crash occurred with the
289 misleading message "bad memory reference; pool not found".
290 Found and traced by Jasen Betts.
292 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
293 dns_again_means_nonexist included an element causing a DNS lookup which
294 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
295 included (though probably not limited to) a process crash from stack
296 memory limit, or from excessive open files. Replace this with a paniclog
297 whine (as this is likely a configuration error), and returning
300 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
301 this always failed, probably leading to the usual downgrade to in-clear
304 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
305 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
306 to not checking that list for these lookups.
308 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
311 JH/23 Fix crash in string expansions. Previously, if an empty variable was
312 immediately followed by an expansion operator, a null-indirection read
313 was done, killing the process.
315 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
316 include an SMTP response string which is longer than that supported
317 by the delivering transport. Alleviate by wrapping such lines before
320 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
321 chars (RFC limit). Previously a limit of 12 items was made, which with
322 a not-impossible References: in the message being bounced could still
323 be over-large and get stopped in the transport.
325 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
326 close. Previously a bare socket close was done.
328 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
331 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
332 message being considered for delivery was already being handled by
333 another process, and having an SMTP connection already open, the function
334 to close it tried to use an uninitialized variable. This would afftect
335 high-volume sites more, especially when running mailing-list-style loads.
336 Pollution of logs was the major effect, as the other process delivered
337 the message. Found and partly investigated by Graeme Fowler.
339 JH/29 Change format of the internal ID used for message identification. The old
340 version only supported 31 bits for a PID element; the new 64 (on systems
341 which can use Base-62 encoding, which is all currently supported ones
342 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
343 and must use Base-36). The new ID is 23 characters rather than 16, and is
344 visible in various places - notably logs, message headers, and spool file
345 names. Various of the ancillary utilities also have to know the format.
346 As well as the expanded PID portion, the sub-second part of the time
347 recorded in the ID is expanded to support finer precision. Theoretically
348 this permits a receive rate from a single comms channel of better than the
350 The major timestamp part of the ID is not changed; at 6 characters it is
351 usable until about year 3700.
352 Updating from previously releases is fully supported: old-format spool
353 files are still usable, and the utilities support both formats. New
354 message will use the new format. The one hints-DB file type which uses
355 message-IDs (the transport wait- DB) will be discarded if an old-format ID
356 is seen; new ones will be built with only new-format IDs.
357 Optionally, a utility can be used to convert spool files from old to new,
358 but this is only an efficiency measure not a requirement for operation
359 Downgrading from new to old requires running a provided utility, having
360 first stopped all operations. This will convert any spool files from new
361 back to old (losing time-precision and PID information) and remove any
362 wait- hints databases.
364 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
365 we treated them as item separators when parsing for a list item, but they
366 need to be protected by the doublequotes. While there, add handling for
369 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
370 Found and fixed by Jasen Betts. No testcase for this as my usual text
371 editor insists on emitting only valid UTF-8.
373 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
374 a null-indirection SIGSEGV for the receive process.
376 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
377 -bh use. Internal checking would spot this and take a panic.
379 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
380 In 4.96 this would expand to empty.
382 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
383 certificate. Find and fix by Andreas Metzler.
385 JH/36 Add ARC info to DMARC hostory records.
387 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
388 or fakedefer. Previously the sender could discover that the message
389 had in fact been accepted.
391 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
392 sequences. Previously the input was not noted as being tainted; notably
393 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
394 bad coding of authenticators.
396 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
397 and ${tr...}. Found and diagnosed by Heiko Schlichting.
399 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
400 could be triggered by externally-supplied input. Found by Trend Micro.
403 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
404 be triggered by externally-controlled input. Found by Trend Micro.
407 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
408 be triggered by externally-controlled input. Found by Trend Micro.
411 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
412 Make the rewrite never match and keep the logging. Trust the
413 admin to be using verify=header-syntax (to actually reject the message).
415 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
418 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
424 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
425 after reception to before a subsequent reception. This should
426 mean slightly faster delivery, and also confirmation of reception
429 JH/02 Move from using the pcre library to pcre2. The former is no longer
430 being developed or supported (by the original developer).
432 JH/03 Constification work in the filters module required a major version
433 bump for the local-scan API. Specifically, the "headers_charset"
434 global which is visible via the API is now const and may therefore
435 not be modified by local-scan code.
437 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
438 sendfile() didi not account for the way the ClamAV driver code called it.
440 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
441 time check was being done for every character; replace that with one
444 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
445 sent was prefixed with a length byte.
447 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
448 RFC 5321. Previously Dovecot (at least) would log errors during
451 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
452 in 4.61 without a reason logged. Binaries will be bigger, which might
453 matter on diskspace-constrained systems, but debug is easier.
455 JH/09 Fix macro-definition during "-be" expansion testing. The move to
456 write-protected store for macros had not accounted for these runtime
457 additions; fix by removing this protection for "-be" mode.
459 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
460 handing out large-numbered file descriptors, violating the usual Unix
461 assumption (and required by Posix) that the lowest possible number will be
462 allocated by the kernel when a new one is needed. In the daemon, and any
463 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
464 are not useable for FD_SET() [and hence select()] and overwrite the stack.
465 Assorted crashes happen.
467 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
468 main-section options or in a connect ACL, the value from the first ever
469 connection was never replaced for subsequent connections. Found by
472 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
473 though only once PCRE2 was introduced: the memory accounting used under
474 debug offset allocations by an int, giving a hard trap in early startup.
475 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
477 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
478 with underbars is given. The write-protection of configuration introduced
479 in 4.95 trapped when normalisation was applied to an option not needing
482 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
484 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
485 failing to close the certificates directory, every hour or any time it
488 JH/16 Debugging initiated by an ACL control now continues through into routing
489 and transport processes. Previously debugging stopped any time Exim
490 re-execs, or for processing a queued message.
492 JH/17 The "expand" debug selector now gives more detail, specifically on the
493 result of expansion operators and items.
495 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
496 bad comparison between the option value and the name of the file to
497 be included was done, and a mismatch was wrongly identified.
498 4.88 to 4.95 are affected.
500 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
502 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
503 supplied as the db file-pair basename. Previously, if a directory
504 path was given, for example via the autoreply "once" option, the DB
505 file.pag and file.dir files would be created in that directory's
508 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
509 "taint" log_selector. These were previously deprecated.
511 JH/22 Fix static address-list lookups to properly return the matched item.
512 Previously only the domain part was returned.
514 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
515 the call into OpenSSL to send a TLS Close was being repeated; this
516 resulted in the library waiting for the peer's Close. If that was never
517 sent we waited forever. Fix by tracking send calls.
519 JH/24 The ${run} expansion item now expands its command string elements after
520 splitting. Previously it was before; the new ordering makes handling
521 zero-length arguments simpler. The old ordering can be obtained by
522 appending a new option "preexpand", after a comma, to the "run".
524 JH/25 Taint-check exec arguments for transport-initiated external processes.
525 Previously, tainted values could be used. This affects "pipe", "lmtp" and
526 "queryprogram" transport, transport-filter, and ETRN commands.
527 The ${run} expansion is also affected: in "preexpand" mode no part of
528 the command line may be tainted, in default mode the executable name
531 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
532 the the facility was not passed across execs, and only the first message
533 passed over a connection could use BDAT; any further ones using DATA.
535 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
536 uses $sending_ip_address and an interface is specified.
537 Previously any use of the local address in the EHLO name disabled
538 PIPECONNECT, the common case being to use the rDNS of it.
540 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
541 resumption. Previously verify failed because no certificate status is
542 passed on the wire for the restarted session. Fix by using the recorded
543 ocsp status of the stored session for the new connection.
545 JH/29 TLS resumption: the key for session lookup in the client now includes
546 more info that a server could potentially use in configuring a TLS
547 session, avoiding oferring mismatching sessions to such a server.
548 Previously only the server IP was used.
550 JH/30 Fix string_copyn() for limit greater than actual string length.
551 Previously the copied amount was the limit, which could result in a
552 overlapping memcpy for newly allocated destination soon after a
553 source string shorter than the limit. Found/investigated by KM.
555 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
556 close; it may be needed for a subsequent connection. This caused a
557 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
559 JH/32 Fix CHUNKING for a second message on a connection when the first was
560 rejected. Previously we did not reset the chunking-offered state, and
561 erroneously rejected the BDAT command. Investigation help from
564 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
565 an empty address. Previously the expansion returned an error.
567 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
568 proxy. Previously these were misparsed, leading to paniclog entries.
574 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
575 related applications. Previously an "H" was used where available info
576 says that "M" should be, so change to match.
578 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
579 as arguments, so an implementation trying to copy these into a local
580 buffer was taking a taint-enforcement trap. Fix by using dynamically
581 created buffers. Similar fix for radius expansion condition.
583 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
584 reasonable, eg. to count headers. Fix by using dynamically created
585 buffers rather than a local. Do similar fixes for ACL actions "dcc",
586 "log_reject_target", "malware" and "spam"; the arguments are expanded
587 so could be handling tainted values.
589 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
590 broken the (no-op) support for this sendmail command. Restore it
591 to doing nothing, silently, and returning good status.
593 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
594 record path was given (or the default used) without a leading directory
595 path, an error occurred on trying to open it. Use the transport's working
598 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
599 transport. Previously it was the name on the DNS A-record; use instead
600 the head of the CNAME chain leading there (if there is one). This seems
601 to align better with RFC 6125.
603 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
604 smtp_accept_max_per_host allocated resources which were not released
605 when the limit was exceeded. This eventually crashed the daemon. Fix
606 by adding a release action in that path.
608 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
609 expanded; previously using tainted values was rejected. Fix by using
610 dynamically-created buffers.
612 JH/09 Relax restrictions on ACL verify condition needing access to message
613 headers. Previously they were only permitted in data and non-smtp ACLs;
614 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
615 not_blind, header_sender and header_names_ascii verification.
617 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
618 Previously a macro used one argument twice; when called with the
619 argument as an expression having side-effects, incorrect operation
620 resulted. Use an inlineable function.
622 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
623 held open for a verify callout. Previously this wan not accounted for
624 and a corrupt onward SMTP conversation resulted.
626 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
627 Previously they were embedded naively in the constructed address; when
628 needed, strip the quoting and quote the entire local_part.
629 Also make the inbound_srs expansion condition handle quoting.
631 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
632 excluded, not matching the documentation.
634 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
635 was given for the sqlite_dbfile a trap resulted.
637 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
638 "name" argument resulted in a trap. There is no reason to disallow such;
639 this was a coding error.
641 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
642 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
643 spent suspended, ignoring the POSIX definition. Previously we assumed
644 it did and a constant offset from real time could be used as a correction.
645 Change to using the same clock source for the start-of-message and the
646 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
647 exists, just to get a clock slightly more aligned to reality.
649 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
650 RFC says it is optional some validators care. The missing char was not
651 intended but triggered by a line-wrap alignment. Discovery and fix by
652 Guillaume Outters, hacked on by JH.
654 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
655 name being quoted was tainted a trap would be taken. Fix by using
656 dynamically created buffers. The routine could have been called by a
657 rewrite with the "h" flag, by using the "-F" command-line option, or
658 by using a "name=" option on a control=submission ACL modifier.
660 JH/19 SPF: change the Authentication-Results expansion component to give
661 smtp.helo when the sender domain is empty. Previously it gave
664 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
665 not in 127.0.0.0/8 to help in spotting list domains taken over by a
666 domain-parking registrar.
668 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
669 Previously when a whitespace character was specified it was not inserted
670 after removing the newline.
672 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
673 the domain part of the recipient address. This overrides any tls_sni
674 option set, which was previously used.
676 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
679 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
680 is_tainted() had an off-by-one error in the overenthusiastic direction.
681 Find and fix by Gavan. Although NetBSD is not a supported platform for
682 4.94 this bug could affect other platforms.
684 PP/01 Fix default prime selection to be consistent.
685 One path used ike23 still, instead of exim.dev.20160529.3; now both
686 execution flows will use the same DH primes (currently
687 exim.dev.20160529.3).
689 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
690 option in smtp transport, to match the documentation. Previously
691 verification was not being done in some cases where it should have been.
693 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
694 than one server was defined and depending on the platform memory layout
695 details, an internal consistency trap could be hit while walking the list
698 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
699 files. The value is used by the authresults expansion item. Previously
700 if this was used in a router or transport, a crash could result.
702 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
703 have a sufficient incidence of EINTR returns from select that an
704 interaction with other operations done by the main daemon loop exposed
705 a bug in the error-handling. This was benign apart from the log
708 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
709 for consistency with delivered "=>" and failed "**" lines. While we're
710 there, handle PRX and TFO.
712 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
713 applied. This resulted, if any header-line rewrite rules were configured,
714 in a panic-log triggerable by sending a message with a long address in
715 a header. Fix by increasing the arbitrary limit to larger than a single
716 (dewrapped) 5322 header line maximum size.
718 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
719 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
720 RFC 6648 which deprecates X- options in protocols as a general practice.
721 Changeover between the implementations is handled by the mechanisms
724 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
725 a remote which uses callout/hold. Previously the local was queued.
727 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
730 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
731 log line. The asterisk is now consistently appended to the remote IP
732 (and port, if given), and will also be provided on defer and fail log
733 lines. Previously it could be placed on the local IP if that was being
734 logged, and was only provided on delivery lines.
736 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
738 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
739 authenticator client_send option. Previously the next char, after a pair
740 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
741 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
742 documentation. There is still no way to get a leading ^ immediately
743 after a NUL (ie. for the password of a PLAIN method authenticator.
745 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
746 files. For bad sizes read, delete the record and whine to paniclog.
748 JH/38 When logging an AUTH failure, as server, do not include sensitive
749 information. Previously, the credentials would be included if given
750 as part of the AUTH command line and an ACL denied authentication.
752 JH/39 Bug 2691: fix $local_part_data. When the matching list element
753 referred to a file, bad data was returned. This likely also affected
756 JH/40 The gsasl authenticator now supports caching of the salted password
757 generated by the client-side implementation. This required the addition
758 of a new variable: $auth4.
760 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
761 left undeleted; the attempt to re-create it then failed - resulting in
762 the usual "SIGHUP tp have daemon reload configuration" to not work.
763 This affected any platform not supporting "abstract" Unix-domain
764 sockets (i.e. not Linux).
766 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
767 recipients" response to RCPT in a later response, with a 250. The
768 previous coding assumed this would not happen, and under PIPELINING
769 would result in both lost and duplicate recipients for a message.
771 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
772 Previously the weighting was incorrectly applied. Similar fix for socks
773 proxies. Found and fixed by Heiko Schlichting.
775 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
776 not handle sub-lists included using the +namedlist syntax. While
777 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
778 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
781 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
782 Previously the permanent pool was used, so the store could not be freed.
783 This meant a connection with many messages would use continually-growing
786 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
787 per-pool so as not to waste too much space. Previously a constant size
788 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
789 DOS attacks harder. The cost is wasted memory use in the larger blocks.
791 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
792 same space repeatedly, and a smaller process footprint.
794 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
795 for GnuTLS. Previously the name started "%s" which, while not a bug,
796 looked as if if might be one.
798 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
799 "continued connection") make the $proxy_* variables available. Previously
800 the information was not passed across the exec() call for subsequent
801 transport executions. This also mean that the log lines for the
802 messages can show the proxy information.
804 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
805 receive time. With modern systems the difference is significant.
806 The historical behaviour can be restored by disabling (a new) log_selector
807 "queue_time_exclusive".
809 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
810 content) were specifically tested for. Now, also cover expansions
811 resulting in ACL names and inline ACL content.
813 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
814 making it unusable in complex expressions.
816 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
817 fail with a taint-check on the spoolfile name, and leave the message
820 HS/01 Enforce absolute PID file path name.
822 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
824 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
826 PP/02 Bug 2643: Correct TLS DH constants.
827 A missing NUL termination in our code-generation tool had led to some
828 incorrect Diffie-Hellman constants in the Exim source.
829 Reported by kylon94, code-gen tool fix by Simon Arlott.
831 PP/03 Impose security length checks on various command-line options.
832 Fixes CVE-2020-SPRSS reported by Qualys.
834 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
835 better. Reported by Qualys.
837 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
838 providing a particularly obnoxious sender full name.
841 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
843 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
846 PP/08 Change default for recipients_max from unlimited to 50,000.
848 PP/09 Fix security issue with too many recipients on a message (to remove a
849 known security problem if someone does set recipients_max to unlimited,
850 or if local additions add to the recipient list).
851 Fixes CVE-2020-RCPTL reported by Qualys.
853 PP/10 Fix security issue in SMTP verb option parsing
854 Fixes CVE-2020-EXOPT reported by Qualys.
856 PP/11 Fix security issue in BDAT state confusion.
857 Ensure we reset known-good where we know we need to not be reading BDAT
858 data, as a general case fix, and move the places where we switch to BDAT
859 mode until after various protocol state checks.
860 Fixes CVE-2020-BDATA reported by Qualys.
862 HS/03 Die on "/../" in msglog file names
864 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
865 the Exim runtime user are allowed to create files.
867 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
870 QS/03 When reading the output from interpreted forward files we do not
871 pass the pipe between the parent and the interpreting process to
872 executed child processes (if any).
874 QS/04 Always die if requested from internal logging, even is logging is
877 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
878 the API; compilation noo longer completes with DMARC support included.
879 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
880 been reported on other platforms.
882 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
884 JH/56 Make the majority of info read from config files readonly, for defence-in-
885 depth against exploits. Suggestion by Qualys.
886 Not supported on Solaris 10.
888 JH/57 Fix control=fakreject for a custom message containing tainted data.
889 Previously this resulted in a log complaint, due to a re-expansion present
890 since fakereject was originally introduced.
892 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
893 modifier was given, a loop resulted.
895 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
896 pipelined SMTP command followed the BDAT LAST then it would be
897 incorrectly treated as part of the message body, causing a verification
900 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
901 require looser validation rules than those for 821-level addresses,
902 which only permit IP addresses.
908 JH/01 Avoid costly startup code when not strictly needed. This reduces time
909 for some exim process initialisations. It does mean that the logging
910 of TLS configuration problems is only done for the daemon startup.
912 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
914 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
915 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
918 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
919 DKIM signing is being done. Previously a transport_filter would always
920 disable CHUNKING, falling back to traditional DATA.
922 JH/05 Regard command-line recipients as tainted.
924 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
926 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
927 PAM library frees one of the arguments given to it, despite the
928 documentation. Therefore a plain malloc must be used.
930 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
931 on-stack buffers were used, resulting in a taint trap when DSN information
932 copied from a received message was written into the buffer.
934 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
935 the ordering of its ARC headers. This caused a crash.
937 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
938 a new record was being constructed with information from the peer, a trap
941 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
942 installation would get error messages from DMARC verify, when it hit the
943 nonexistent file indicated by the default. Distros wanting DMARC enabled
944 should both provide the file and set the option.
945 Also enforce no DMARC verification for command-line sourced messages.
947 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
948 could, depending on the platform, hang at the STARTTLS response.
950 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
951 message on a connection. Previously if one message had ARC headers and
952 the following one did not, a crash could result when adding an
953 Authentication-Results: header.
955 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
956 Exim main code and Exim-related utities. The introduction of taint
957 tracking also did many adjustments to string handling. Since then, eximon
958 frequently terminated with an assert failure.
960 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
961 check for 452 responses. This slightly helps the inefficieny of doing
962 a large alias-expansion into a recipient-limited target. The max_rcpt
963 transport option still applies (and at the current default, will override
964 the new feature). The check is done for either cause of synch, and forces
965 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
966 connection. The new facility is not tunable at this time.
968 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
969 library live data was being used, so the results became garbage. Make
970 copies while it is still usable.
972 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
973 on delivery deferred (==) and failed (**) lines (if a delivery was
974 attemtped). Previously it was only on completion (=>) lines.
976 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
977 for the expansion of the server_scram_iter and server_scram_salt options.
979 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
980 are now specifically given a NO_DATA response without hitting the system
981 resolver. The library goes on to do the now-standard TXT lookup.
982 Use of dnsdb lookups is not affected.
984 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
985 only retrieve the errormessage once. Previously two calls to dlerror()
986 were used, and the second one (for mainlog/paniclog) retrieved null
989 JH/20 Taint checking: disallow use of tainted data for
990 - the appendfile transport file and directory options
991 - the pipe transport command
992 - the autoreply transport file, log and once options
993 - file names used by the redirect router (including filter files)
995 - paths used by single-key lookups
996 Previously this was permitted.
998 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
999 adjusted the size of a major service buffer; this failed because the
1000 buffer was in use at the time. Change to a compile-time increase in the
1001 buffer size, when this authenticator is compiled into exim.
1003 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
1004 previous fast-mode was untenable in the face of glibs using mmap to
1005 support larger malloc requests.
1007 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
1008 New values supported, if defined on system where compiled:
1009 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
1010 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
1012 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
1013 running a limited number of proceses in parallel, a benefit is gained. The
1014 amount varies with the platform hardware and load. The use of the option
1015 queue_run_in_order means we cannot do this, as ordering becomes
1018 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1019 had introduced a string-copy (for ensuring NUL-termination) which was not
1020 appropriate for that case, which can include embedded NUL bytes in the
1021 block of data. Investigation showed the copy to actually be needless, the
1022 data being length-specified.
1024 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1025 done during a receiving connection, and both used TLS, global info was
1026 used rather than per-connection info for tracking the state of data
1027 queued for transmission. This could result in a connection hang.
1029 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1030 Previously, when delivering serveral messages down a single connection
1031 only the first would provide a SIZE. This was due to the size information
1032 not being properly tracked.
1034 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1035 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1036 expansion and logging. Previously, spurious values such as a future
1037 minute could be seen.
1039 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1040 it could crash from a null-deref. This could also affect the
1041 ${addresses: } operator and ${readsock } item.
1043 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1044 message following a mime one, the variable was not reset.
1046 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1047 cached capability (perhaps the peer reneged?) and immediately retry in
1050 JH/31 Fix spurious detection of timeout while writing to transport filter.
1052 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1053 an attempt to copy the string was made before checking it.
1055 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1056 taint of the lookup key was maintained; we now regard the presence in the
1057 filesystem as sufficient validation.
1059 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1060 argument is supplied.
1062 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1063 Previously this was not checked, and nonempty relative paths made an
1064 access under Exim's current working directory.
1066 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1067 Previously no event was raised.
1069 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1070 parameter supplied by the sender MAIL FROM command. Previously it was
1071 ignored, and only the check_spool_space option value for the required
1074 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1075 the size of the signing public-key. Previously it was instead giving
1076 the size of the signature hash.
1078 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1079 the default. See the (new) dkim_verify_min_keysizes option.
1081 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1082 and an ACL use a lookup for checking either the local_part or domain,
1083 stale data could be accessed. Ensure that variable references are
1084 dropped between messages.
1086 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1087 by the client was not checked as pointing within response data before
1088 being used. A malicious client could thus cause an out-of-bounds read and
1089 possibly gain authentication. Fix by adding the check.
1091 JH/42 Internationalisation: change the default for downconversion in the smtp
1092 transport to be "if needed". Previously it was "as previously set" for
1093 the message, which usually meant "if needed" for message-submission but
1094 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1095 even when the envelope addresses did not need it, resulting in forwarding
1096 failures to non-supporting MTAs. A downconvert in such cases will be
1097 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1098 transport. The change does mean that addresses needing conversion will
1099 be converted when previously a delivery failure would occur.
1101 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1102 response was received it would be used unchecked in a fail-DSN, violating
1103 standards on line-length limits. Truncate if needed.
1105 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1106 doesn't work. (Additionally add a new main config option to configure the
1113 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1114 side, to decode a TLS 1.3 packet capture.
1116 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1117 Previously the default library behaviour applied, sending two, each in
1118 its own TCP segment.
1120 JH/03 Debug output for ACL now gives the config file name and line number for
1123 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1125 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1127 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1128 buffer overrun for (non-chunking) other transports.
1130 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1131 TLS1.3, means that a server rejecting a client certificate is not visible
1132 to the client until the first read of encrypted data (typically the
1133 response to EHLO). Add detection for that case and treat it as a failed
1134 TLS connection attempt, so that the normal retry-in-clear can work (if
1135 suitably configured).
1137 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1138 and/or domain. Found and fixed by Jason Betts.
1140 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1141 configuration). If a CNAME target was not a wellformed name pattern, a
1144 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1145 the OS reports them interleaved with other addresses.
1147 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1148 used both for input and for a verify callout, both encrypted, SMTP
1149 responses being sent by the server could be lost. This resulted in
1150 dropped connections and sometimes bounces generated by a peer sending
1153 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1154 string. Previously it was possible to cause undefined behaviour in a
1155 library routine (usually a crash). Found by "zerons".
1157 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1160 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1161 API was removed, so update to use the newer ones.
1163 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1164 any timeout set, is taking a long time. Previously we would hang on to a
1165 rotated logfile "forever" if the input was arriving with long gaps
1166 (a previous attempt to fix addressed lack, for a long time, of initial
1169 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1170 shared (NFS) environment. The length of the tempfile name is now
1171 4 + 16 ("hdr.$message_exim_id") which might break on file
1172 systems which restrict the file name length to lower values.
1173 (It was "hdr.$pid".)
1175 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1176 shared (NFS) environment.
1178 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1179 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1182 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1183 on some platforms for bit 31.
1185 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1186 to changes apparently associated with TLS1.3 handling some of the APIs
1187 previously used were either nonfunctional or inappropriate. Strings
1188 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1189 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1190 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1191 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1192 and the use of specific cipher names in the encrypted= ACL condition.
1194 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1196 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1197 verification result was not updated unless hosts_require_ocsp applied.
1199 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1200 queue_list_requires_admin set to false, non-admin users were denied the
1203 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1204 directory-of-certs mode. Previously they were advertised despite the
1207 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1208 A single TCP connection by a client will now hold a TLS connection open
1209 for multiple message deliveries, by default. Previously the default was to
1212 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1213 default. If built with the facility, DANE will be used. The facility
1214 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1216 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1217 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1218 must be defined and you must still, unless you define DISABLE_TLS, manage
1219 the the include-dir and library-file requirements that go with that
1220 choice. Non-TLS builds are still supported.
1222 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1225 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1226 default. If the platform supports and has the facility enabled, it will
1227 be requested on all coneections.
1229 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1230 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1232 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1234 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1235 success-DSN messages. Previously the From: header was always the default
1236 one for these; the option was ignored.
1238 JH/28 Fix the timeout on smtp response to apply to the whole response.
1239 Previously it was reset for every read, so a teergrubing peer sending
1240 single bytes within the time limit could extend the connection for a
1241 long time. Credit to Qualsys Security Advisory Team for the discovery.
1243 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1244 delivery address, which leaked information of the results of local
1245 forwarding. Change to the original envelope recipient address, per
1248 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1249 requested. Previously not bounce was generated and a log entry of
1250 error ignored was made.
1252 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1254 JH/32 Introduce a general tainting mechanism for values read from the input
1255 channel, and values derived from them. Refuse to expand any tainted
1256 values, to catch one form of exploit.
1258 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1259 was unused and the unexpanded text used for the test. Found and
1260 fixed by Ruben Jenster.
1262 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1263 an attempt to use a TLS library read routine dereffed a nul pointer,
1266 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1267 them in our smtp response.
1269 JH/36 Have the general router option retry_use_local_part default to true when
1270 any of the restrictive preconditions are set (to anything). Previously it
1271 was only for check_local user. The change removes one item of manual
1272 configuration which is required for proper retries when a remote router
1273 handles a subset of addresses for a domain.
1275 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1276 link count into consideration.
1278 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1279 caused the extension of big_buffer, the following lines were ignored.
1281 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1282 accordance with RFC 2308. Previously there was no expiry, so a longlived
1283 receive process (eg. due to ACL delays) versus a short SOA value could
1286 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1288 JH/39 Promote DMARC support to mainline.
1290 JH/40 Bug 2452: Add a References: header to DSNs.
1292 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1293 parameters. The relevant library call is documented as "Deprecated: This
1294 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1295 3.6.0, DH parameters are negotiated following RFC7919."
1297 HS/06 Change the default of dnssec_request_domains to "*"
1299 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1300 carried on and emitted a BDAT command, even when PIPELINING was not
1303 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1304 buffer was used for the filename, resulting in a trap when tainted
1305 arguments (eg. $domain) were used.
1307 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1308 recommended to avoid a possible server-load attack. The feature can be
1309 re-enabled via the openssl_options main cofiguration option.
1311 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1312 for version 4.90 - adding a "more data" boolean to the arguments.
1313 Bumped the ABI version number also, this having been missed previously;
1314 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1315 respect of usage of smtp_printf() by either local_scan code or libraries
1316 accessed via the ${dlfunc } expansion item. Both will need coding
1317 adjustment for any calls to smtp_printf() to match the new function
1318 signature; a FALSE value for the new argument is always safe.
1320 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1321 the file-offset (which the Linux syscall does, and exim expects); this
1322 resulted in an indefinite loop.
1324 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1325 to do ARC verification. The Authentication-Results: header line added
1326 by the configuration then had no ARC item.
1328 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1329 an incorrect mode was used for reading the result, resulting in it being
1336 JH/01 Remove code calling the customisable local_scan function, unless a new
1337 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1339 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1340 non-signal-safe functions being used.
1342 JH/03 Bug 2269: When presented with a received message having a stupidly large
1343 number of DKIM-Signature headers, disable DKIM verification to avoid
1344 a resource-consumption attack. The limit is set at twenty.
1346 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1347 report of oldest_pass in ${authres } in consequence, and separate out
1348 some descriptions of reasons for verification fail.
1350 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1351 files in the spool were present and unlocked. A queue-runner could spot
1352 them, resulting in a duplicate delivery. Fix that by doing the unlock
1353 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1354 add more error-checking on spoolfile handling while that code is being
1357 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1358 No known attacks, no CVE, this is defensive hardening.
1360 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1361 a queue-runner could start a delivery while other operations were ongoing.
1362 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1363 Found and investigated by Tim Stewart. Fix by using the open message data
1364 file handle rather than opening another, and not locally closing it (which
1365 releases a lock) for that case, while creating the temporary .eml format
1366 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1368 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1369 $sender_verify_failure/$recipient_verify_failure to "random".
1371 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1374 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1375 Previously this would segfault.
1377 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1380 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1381 like zero, since the resolver should be doing this for us, But we need one
1382 as a CNAME but no MX presence gets the CNAME returned; we need to check
1383 that doesn't point to an MX to declare it "no MX returned" rather than
1384 "error, loop". A new main option is added so the older capability of
1385 following some limited number of chain links is maintained.
1387 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1389 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1390 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1391 now-deprecated earlier definitions used only specified the range up to TLS
1392 1.2 (in the older-version library docs).
1394 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1396 JH/15 Rework TLS client-side context management. Stop using a global, and
1397 explicitly pass a context around. This enables future use of TLS for
1398 connections to service-daemons (eg. malware scanning) while a client smtp
1399 connection is using TLS; with cutthrough connections this is quite likely.
1401 JH/16 Fix ARC verification to do AS checks in reverse order.
1403 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1405 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1406 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1407 Previously the "utf8" would be re-prepended for every additional message.
1409 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1410 Previously thery were accepted, resulting in issues when attempting to
1411 forward messages to a non-supporting MTA.
1413 PP/02 Let -n work with printing macros too, not just options.
1415 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1416 one parent address was copied, and bogus data was used at delivery-logging
1417 time. Either a crash (after delivery) or bogus log data could result.
1418 Discovery and analysis by Tim Stewart.
1420 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1421 Previously if the string ended mid-character, we did not insert the
1422 promised '?' replacement.
1424 PP/04 Documentation: current string operators work on bytes, not codepoints.
1426 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1427 should pack well giving a smaller memory footprint so better caching and
1428 therefore performance. Group the declarations where this can't be done so
1429 that the byte-sized flag variables are not interspersed among pointer
1430 variables, giving a better chance of good packing by the compiler.
1432 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1433 non-null, to avoid issues with sites running BATV. Previously reports were
1434 sent with an empty envelope sender so looked like bounces.
1436 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1437 The ignore_error flag wasn't being returned from the filter subprocess so
1438 was not set for later routers. Investigation and fix by Matthias Kurz.
1440 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1441 and a msg:complete for the whole, when a message is manually removed using
1442 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1444 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1445 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1446 hope that is portable enough.
1448 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1449 requiring a known-CA anchor certificate; make it now rely entirely on the
1450 TLSA as an anchor. Checking the name on the leaf cert against the name
1451 on the A-record for the host is still done for TA (but not for EE mode).
1453 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1454 included in delivery lines for non-proxied connections, when compiled with
1455 SUPPORT_SOCKS and running with proxy logging enabled.
1457 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1458 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1459 move the existing event to fire before the normal logging of message
1460 failure so that custom logging is bracketed by normal logging.
1462 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1463 msg:fail:internal event. Developement by Matthias Kurz.
1465 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1466 far too small for todays use of crypto signatures stored there. Go all
1467 the way to the max DNS message size of 64kB, even though this might be
1468 overmuch for IOT constrained device use.
1470 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1471 copy a string over itself. The library routine is documented as not
1472 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1474 JH/32 For main options check_spool_space and check_inode_space, where the
1475 platform supports 64b integers, support more than the previous 2^31 kB
1476 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1477 the previous G, M, k.
1479 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1480 $authenticated_fail_id variable on authentication failure. Previously
1483 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1484 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1485 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1486 GNUTLS_SEC_PARAM_MEDIUM.
1488 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1489 side. Previously we would continue as if no SNI had been received.
1491 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1492 "<" character, which should be a list-separator specification, we walked
1493 off past the nul-terimation.
1495 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1496 causes) even when the retry time is not yet met. Previously they were
1497 not, meaning that when (say) an account was over-quota and temp-rejecting,
1498 and multiple senders' messages were queued, only one sender would get
1499 notified on each configured delay_warning cycle.
1501 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1503 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1504 cipher-suites, an error can be left on the stack even for a succeeding
1505 accept; this results in impossible error messages when a later operation
1508 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1509 return error codes indicating retry. Under TLS1.3 this becomes required.
1511 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1512 it only wrote the new authenticators, resulting in a lack of tracking of
1513 peer changes of ESMTP extensions until the next cache flush.
1515 JH/41 Fix the loop reading a message header line to check for integer overflow,
1516 and more-often against header_maxsize. Previously a crafted message could
1517 induce a crash of the recive process; now the message is cleanly rejected.
1519 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1520 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1526 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1527 When redis_servers is set to a list of > 1 element, and the Redis servers
1528 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1529 case of MOVED into a DEFER case instead, thus moving the query onto the
1530 next server in the list. For a cluster of N elements, all N servers must
1531 be defined in redis_servers.
1533 GF/02 Catch and remove uninitialized value warning in exiqsumm
1534 Check for existence of @ARGV before looking at $ARGV[0]
1536 JH/01 Replace the store_release() internal interface with store_newblock(),
1537 which internalises the check required to safely use the old one, plus
1538 the allocate and data copy operations duplicated in both (!) of the
1539 extant use locations.
1541 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1542 modifier. This matches the restriction on the commandline.
1544 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1545 Previously only the last row was returned.
1547 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1548 we assumed that tags in the header were well-formed, and parsed the
1549 element content after inspecting only the first char of the tag.
1550 Assumptions at that stage could crash the receive process on malformed
1553 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1554 While running the DKIM ACL we operate on the Permanent memory pool so that
1555 variables created with "set" persist to the DATA ACL. Also (at any time)
1556 DNS lookups that fail create cache records using the Permanent pool. But
1557 expansions release any allocations made on the current pool - so a dnsdb
1558 lookup expansion done in the DKIM ACL releases the memory used for the
1559 DNS negative-cache, and bad things result. Solution is to switch to the
1560 Main pool for expansions.
1561 While we're in that code, add checks on the DNS cache during store_reset,
1562 active in the testsuite.
1563 Problem spotted, and debugging aided, by Wolfgang Breyha.
1565 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1566 When none of the hosts presented to a transport match an already-open
1567 connection, close it and proceed with the list. Previously we would
1568 queue the message. Spotted by Lena with Yahoo, probably involving
1571 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1572 Previously a spurious "250 OK id=" response was appended to the proper
1575 JH/08 The "support for" informational output now, which built with Content
1576 Scanning support, has a line for the malware scanner interfaces compiled
1577 in. Interface can be individually included or not at build time.
1579 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1580 by the template makefile "src/EDITME". The "STREAM" support for an older
1581 ClamAV interface method is removed.
1583 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1584 rows affected is given instead).
1586 JH/11 The runtime Berkeley DB library version is now additionally output by
1587 "exim -d -bV". Previously only the compile-time version was shown.
1589 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1590 SMTP connection. Previously, when one had more recipients than the
1591 first, an abortive onward connection was made. Move to full support for
1592 multiple onward connections in sequence, handling cutthrough connection
1593 for all multi-message initiating connections.
1595 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1596 routers. Previously, a multi-recipient message would fail to match the
1597 onward-connection opened for the first recipient, and cause its closure.
1599 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1600 a timeout on read on a GnuTLS initiating connection, resulting in the
1601 initiating connection being dropped. This mattered most when the callout
1602 was marked defer_ok. Fix to keep the two timeout-detection methods
1605 JH/15 Relax results from ACL control request to enable cutthrough, in
1606 unsupported situations, from error to silently (except under debug)
1607 ignoring. This covers use with PRDR, frozen messages, queue-only and
1610 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1612 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1613 metadata, resulting in a crash in free().
1615 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1616 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1617 Broken also in d185889f4, with init system revamp.
1619 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1620 Previously we abruptly closed the connection after reading a malware-
1621 found indication; now we go on to read the "scan ok" response line,
1624 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1625 ACL. Previously, a crash would result.
1627 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1628 macro text after a replacement (previously it was only once per line) and
1629 by skipping builtin macros when searching for an uppercase lead character.
1631 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1632 for the build is renamed.
1634 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1635 was allocated for every new TLS startup, meaning one per message. Fix
1636 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1638 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1639 reported the original. Fix to report (as far as possible) the ACL
1640 result replacing the original.
1642 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1643 OpenSSL. Certificate information is loaded for every new TLS startup,
1644 and the resources needed to be freed.
1646 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1648 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1651 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1652 DATA response info to the (existing) per-recipient response info for
1653 the "C=" log element. It can have useful tracking info from the
1654 destination system. Patch from Simon Arlott.
1656 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1657 length value. Previously this would segfault.
1659 HS/02 Support Avast multiline protoocol, this allows passing flags to
1660 newer versions of the scanner.
1662 JH/28 Ensure that variables possibly set during message acceptance are marked
1663 dead before release of memory in the daemon loop. This stops complaints
1664 about them when the debug_store option is enabled. Discovered specifically
1665 for sender_rate_period, but applies to a whole set of variables.
1666 Do the same for the queue-runner and queue-list loops, for variables set
1667 from spool message files. Do the same for the SMTP per-message loop, for
1668 certain variables indirectly set in ACL operations.
1670 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1671 as a multi-recipient message from a mailinglist manager). The coding had
1672 an arbitrary cutoff number of characters while checking for more input;
1673 enforced by writing a NUL into the buffer. This corrupted long / fast
1674 input. The problem was exposed more widely when more pipelineing of SMTP
1675 responses was introduced, and one Exim system was feeding another.
1676 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1677 receiving system, and refused recipients seen by the sending system
1678 (propating to people being dropped from mailing lists).
1679 Discovered and pinpointed by David Carter.
1681 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1682 replaced by the ${authresults } expansion.
1684 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1686 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1687 allows proper process termination in container environments.
1689 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1690 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1692 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1693 and "err_perm", deprecated since 4.83 when the RFC-defined words
1694 "temperror" and "permerror" were introduced.
1696 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1697 transport-filters or DKIM-signing. The restriction was lost in the
1698 consolidation of verify-callout and delivery SMTP handling.
1699 Extend the restriction to also cover ARC-signing.
1701 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1702 in defer=pass mode supply a 450 to the initiator. Previously the message
1705 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1706 tls_require_ciphers is used as before.
1708 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1709 "pass_unscanned". Only tmpfails from the scanner are written to
1710 the paniclog, as they may require admin intervention (permission
1711 denied, license issues). Other scanner errors (like decompression
1712 bombs) do not cause a paniclog entry.
1714 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1715 Previously it was possible to log spurious information in receive log
1718 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1719 triggered odd behaviour from Outlook Express clients.
1721 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1724 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1725 since the IETF WG has not yet settled on that versus the original
1726 "bare" representation.
1728 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1729 Previously the millisecond value corrupted the output.
1730 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1731 corrupted the output.
1737 JH/01 Rework error string handling in TLS interface so that the caller in
1738 more cases is responsible for logging. This permits library-sourced
1739 string to be attached to addresses during delivery, and collapses
1740 pairs of long lines into single ones.
1742 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1743 during configuration. Wildcards are allowed and expanded.
1745 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1746 This permits better logging.
1748 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1749 do not close it down and have the child transport start it up again on
1750 the passed-on TCP connection. Instead, proxy the child (and any
1751 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1752 affected: the continued delivery log lines do not have any DNSSEC, TLS
1753 Certificate or OCSP information. TLS cipher information is still logged.
1755 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1756 identical IP addresses on different listening ports. Will also affect
1759 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1760 add noisy ifdef guards to special-case this sillyness.
1761 Patch from Bernd Kuhls.
1763 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1764 than 255 are no longer allowed.
1766 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1767 Disable the session-cache too, which might reduce our load. Since we
1768 currrectly use a new context for every connection, both as server and
1769 client, there is no benefit for these.
1770 GnuTLS appears to not support tickets server-side by default (we don't
1771 call gnutls_session_ticket_enable_server()) but client side is enabled
1772 by default on recent versions (3.1.3 +) unless the PFS priority string
1775 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1776 <https://reproducible-builds.org/specs/source-date-epoch/>.
1778 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1779 the check for any unsuccessful recipients did not notice the limit, and
1780 erroneously found still-pending ones.
1782 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1783 MSG_MORE. Only in-clear (not on TLS connections).
1785 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1786 transport-filter is involved we can buffer the headers in memory for
1787 creating the signature, and read the spool data file once for the
1788 signature and again for transmission.
1790 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1791 4.77 as the kernel support then wasn't solid, having issues in 64bit
1792 mode. Now, it's been long enough. Add support for FreeBSD also.
1794 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1795 case where the routing stage had gathered several addresses to send to
1796 a host before calling the transport for the first, we previously failed
1797 to close down TLS in the old transport process before passing the TCP
1798 connection to the new process. The new one sent a STARTTLS command
1799 which naturally failed, giving a failed delivery and bloating the retry
1800 database. Investigation and fix prototype from Wolfgang Breyha.
1802 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1803 false-negatives in the check that the sender had not preempted a response
1804 or prompt from Exim (running as a server), due to that code's lack of
1805 awareness of the SMTP input buffering.
1807 PP/04 Add commandline_checks_require_admin option.
1808 Exim drops privileges sanely, various checks such as -be aren't a
1809 security problem, as long as you trust local users with access to their
1810 own account. When invoked by services which pass untrusted data to
1811 Exim, this might be an issue. Set this option in main configuration
1812 AND make fixes to the calling application, such as using `--` to stop
1815 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1816 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1817 responses to those, into a single TLS record each way (this usually means
1818 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1821 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1822 affects you only if you're dancing at the edge of the param size limits.
1823 If you are, and this message makes sense to you, then: raise the
1824 configured limit or use OpenSSL 1.1. Nothing we can do for older
1827 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1828 cmdline element to get the documented default one. Previously it was
1831 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1832 are unsuable for non-message-specific reasons - eg. connection timeout,
1833 banner-time rejection.
1835 JH/16 Fix logging of delivery remote port, when specified by router, under
1838 PP/06 Repair manualroute's ability to take options in any order, even if one
1839 is the name of a transport.
1842 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1844 JH/17 Change the list-building routines interface to use the expanding-string
1845 triplet model, for better allocation and copying behaviour.
1847 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1848 Previously it was constructed the first time a possibly-matching string
1849 was met in the configuration file input during startup; now it is done
1852 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1853 compatible one, to avoid the (poorly documented) possibility of a config
1854 file in the working directory redirecting the DB files, possibly correpting
1855 some existing file. CVE-2017-10140 assigned for BDB.
1857 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1858 cache-hot. Previously, although the result was properly cached, the
1859 initial verify call returned a defer.
1861 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1862 the main verify for receipient in uncached-mode.
1864 JH/22 Retire historical build files to an "unsupported" subdir. These are
1865 defined as "ones for which we have no current evidence of testing".
1867 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1868 if present. Previously it was ignored.
1870 JH/24 Start using specified-initialisers in C structure init coding. This is
1871 a C99 feature (it's 2017, so now considered safe).
1873 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1874 if was a fixed-sized field and bitmask ops via macros; it is now more
1877 PP/07 GitHub PR 56: Apply MariaDB build fix.
1878 Patch provided by Jaroslav Škarvada.
1880 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1881 during Coverity cleanups [4.87 JH/47]
1882 Diagnosis and fix provided by Michael Fischer v. Mollard.
1884 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1885 the right size to place the terminating semicolon on its own folded
1886 line, the header hash was calculated to an incorrect value thanks to
1887 the (relaxed) space the fold became.
1889 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1890 and confused the parent.
1892 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1893 which could crash as a result. This could lead to undeliverable messages.
1895 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1898 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1899 matters on fast-turnover and PID-randomising systems, which were getting
1900 out-of-order delivery.
1902 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1903 a possibly-overlapping copy. The symptom was that "Remote host closed
1904 connection in response to HELO" was logged instead of the actual 4xx
1907 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1908 Previously only that bufferd was discarded, resulting in SYMTP command
1911 JH/32 DKIM: when a message has multiple signatures matching an identity given
1912 in dkim_verify_signers, run the dkim acl once for each. Previously only
1913 one run was done. Bug 2189.
1915 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1916 "panic the current process" to "deliberately defer". The panic log is
1917 still written with the problem list name; the mail and reject logs now
1918 get a temp-reject line for the message that was being handled, saying
1919 something like "domains check lookup or other defer". The SMTP 451
1920 message is still "Temporary local problem".
1922 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1923 A crafted sequence of BDAT commands could result in in-use memory beeing
1924 freed. CVE-2017-16943.
1926 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1927 from SMTP input. Previously it was always done; now only done for DATA
1928 and not BDAT commands. CVE-2017-16944.
1930 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1931 to the message (such as an overlong header line). Previously this was
1932 not done and we did not exit BDAT mode. Followon from the previous item
1933 though a different problem.
1939 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1940 than -2003 did; needs libidn2 in addition to libidn.
1942 JH/02 The path option on a pipe transport is now expanded before use.
1944 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1945 Patch provided by "Björn", documentation fix added too.
1947 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1948 missing a wire-to-host endian conversion.
1950 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1951 close after a BDAT command line could be taken as a following command,
1952 giving a synch failure. Fix by only checking for synch immediately
1953 before acknowledging the chunk.
1955 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1956 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1957 macro. Patches provided by Josh Soref.
1959 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1960 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1961 by IANA as a service extension. However, John Klensin suggests that we
1964 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1965 the dkim code may be unix-mode line endings rather than smtp wire-format
1966 CRLF, so prepend a CR to any bare LF.
1968 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1969 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1971 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1972 the first were themselves being wrongly included in the feed into dkim
1973 processing; with most chunk sizes in use this resulted in an incorrect
1974 body hash calculated value.
1976 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1977 DKIM signature block, for verification. Although advised against by
1978 standards it is specifically not ruled illegal.
1980 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1982 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1983 missing a body hash (the bh= tag).
1985 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1986 It seems that HAProxy sends the Proxy Protocol information in clear and
1987 only then does a TLS startup, so do the same.
1989 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1990 TCP connections (such as for Spamd) unless the daemon successfully set
1991 Fast Open mode on its listening sockets. This fixes breakage seen on
1992 too-old kernels or those not configured for Fast Open, at the cost of
1993 requiring both directions being enabled for TFO, and TFO never being used
1994 by non-daemon-related Exim processes.
1996 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1997 endings, at least on the first header line. Try to canonify any that get
1998 past that check, despite the cost.
2000 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
2001 now limited to an arbitrary five deep, while parsing addresses with the
2002 strip_excess_angle_brackets option enabled.
2004 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
2005 instead leave the unprompted TLS handshake in socket buffer for the
2006 TLS library to consume.
2008 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
2010 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
2012 JH/16 Drop variables when they go out of scope. Memory management drops a whole
2013 region in one operation, for speed, and this leaves assigned pointers
2014 dangling. Add checks run only under the testsuite which checks all
2015 variables at a store-reset and panics on a dangling pointer; add code
2016 explicitly nulling out all the variables discovered. Fixes one known
2017 bug: a transport crash, where a dangling pointer for $sending_ip_address
2018 originally assigned in a verify callout, is re-used.
2020 PP/06 Drop '.' from @INC in various Perl scripts.
2022 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2024 PP/08 Reduce a number of compilation warnings under clang; building with
2025 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2026 should be warning-free.
2028 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2030 HS/01 Fix portability problems introduced by PP/08 for platforms where
2031 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2033 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2034 chunk. This allows us to accept broken chunked messages. We need a more
2035 general solution here.
2037 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2038 already-broken messages in the queue.
2040 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2042 JH/19 Fix reference counting bug in routing-generated-address tracking.
2048 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2049 supports it and a size is available (ie. the sending peer gave us one).
2051 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2052 years of being deprecated). The replacements are the ACLs
2053 acl_smtp_mime and acl_not_smtp_mime.
2055 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2056 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2057 or even an in-clear connection were permitted. Now, if the host lookup
2058 was dnssec and dane was requested then the host is only used if the
2059 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2060 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2061 if one fails this test.
2062 This means that a poorly-configured remote DNS will make it incommunicado;
2063 but it protects against a DNS-interception attack on it.
2065 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2066 non-noisy when a race steals the message being considered.
2068 JH/05 If main configuration option tls_certificate is unset, generate a
2069 self-signed certificate for inbound TLS connections.
2071 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2072 in rewrites and routers.
2074 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2075 and logged a warning sing 4.83; now they are a configuration file error.
2077 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2078 (lacking @domain). Apply the same qualification processing as RCPT.
2080 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2082 JH/10 Support ${sha256:} applied to a string (as well as the previous
2085 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2086 a cutthrough deliver is pending, as we always want to make a connection.
2087 This also avoids re-routing the message when later placing the cutthrough
2088 connection after a verify cache hit.
2089 Do not update it with the verify result either.
2091 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2092 when routing results in more than one destination address.
2094 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2095 signing (which inhibits the cutthrough capability). Previously only
2096 the presence of an option was tested; now an expansion evaluating as
2097 empty is permissible (obviously it should depend only on data available
2098 when the cutthrough connection is made).
2100 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2101 the relevant preceding SMTP command did not note the pipelining mode.
2103 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2104 Previously they were not counted.
2106 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2107 as one having no matching records. Previously we deferred the message
2108 that needed the lookup.
2110 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2111 distinguished as "(=".
2113 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2114 for missing MX records. Previously it only worked for missing A records.
2116 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2118 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2119 after the data-go-ahead and data-ack. Patch from Jason Betts.
2121 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2122 even for a "none" policy. Patch from Tony Meyer.
2124 JH/22 Fix continued use of a connection for further deliveries. If a port was
2125 specified by a router, it must also match for the delivery to be
2128 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2129 When one of the recipients of a message was unsuitable for the connection
2130 (has no matching addresses), we lost track of needing to mark it
2131 deferred. As a result mail would be lost.
2133 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2135 JH/25 Decoding ACL controls is now done using a binary search; the source code
2136 takes up less space and should be simpler to maintain. Merge the ACL
2137 condition decode tables also, with similar effect.
2139 JH/26 Fix problem with one_time used on a redirect router which returned the
2140 parent address unchanged. A retry would see the parent address marked as
2141 delivered, so not attempt the (identical) child. As a result mail would
2144 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2145 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2146 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2149 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2150 Main config options check_{log,spool}_{inodes,space} are now
2151 100 inodes, 10MB unless set otherwise in the configuration.
2153 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2154 Previously it only applied to the main-section connection policy
2157 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2159 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2160 by me. Added RFC7919 DH primes as an alternative.
2162 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2163 are not in the system include path.
2165 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2166 GnuTLS, when a session startup failed (eg because the client disconnected)
2167 Exim did stdio operations after fclose. This was exposed by a recent
2168 change which nulled out the file handle after the fclose.
2170 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2171 signed directly by the cert-signing cert, rather than an intermediate
2172 OCSP-signing cert. This is the model used by LetsEncrypt.
2174 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2176 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2177 an incoming connection.
2179 HS/02 Bug 1802: Do not half-close the connection after sending a request
2182 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2183 fallback to "prime256v1".
2185 JH/34 SECURITY: Use proper copy of DATA command in error message.
2186 Could leak key material. Remotely exploitable. CVE-2016-9963.
2192 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2193 and 3.4.4 - once the server is enabled to respond to an OCSP request
2194 it does even when not requested, resulting in a stapling non-aware
2195 client dropping the TLS connection.
2197 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2198 support variable-length bit vectors. No functional change.
2200 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2201 The I= interface field on outgoing lines is now after the H= remote
2202 host field, same as incoming lines. There is a separate
2203 outgoing_interface log selector which allows you to disable the
2206 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2207 If not running log_selector +smtp_connection the mainlog would be held
2208 open indefinitely after a "too many connections" event, including to a
2209 deleted file after a log rotate. Leave the per net connection logging
2210 leaving it open for efficiency as that will be quickly detected by the
2211 check on the next write.
2213 HS/01 Bug 1671: Fix post transport crash.
2214 Processing the wait-<transport> messages could crash the delivery
2215 process if the message IDs didn't exist for some reason. When
2216 using 'split_spool_directory=yes' the construction of the spool
2217 file name failed already, exposing the same netto behaviour.
2219 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2220 mime_regex ACL conditions.
2222 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2223 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2224 to HELO, local diagnostic string.
2226 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2227 log line to debug. Even when configured with a tls authenticator many
2228 client connections are expected to not authenticate in this way, so
2229 an authenticate fail is not an error.
2231 HS/02 Add the Exim version string to the process info. This way exiwhat
2232 gives some more detail about the running daemon.
2234 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2235 matter for fast-change records such as DNSBLs.
2237 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2238 retry record, even if constant. There may be multiple transports with
2239 different interface settings and the retry behaviour needs to be kept
2242 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2244 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2246 JH/10 Bug 840: fix log_defer_output option of pipe transport
2248 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2249 hosts_randomize. This matters a lot when combined with mua_wrapper.
2251 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2252 ${quote_pgsql:<string>} operator.
2254 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2256 JH/14 Change header file name for freeradius-client. Relevant if compiling
2257 with Radius support; from the Gentoo tree and checked under Fedora.
2259 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2261 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2262 option transport_filter, meaning no filtering.
2264 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2266 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2267 defaults to "*" (all hosts). The variable is now available when not built
2268 with TLS, default unset, mainly to enable keeping the testsuite sane.
2269 If a server certificate is not supplied (via tls_certificate) an error is
2270 logged, and clients will find TLS connections fail on startup. Presumably
2271 they will retry in-clear.
2272 Packagers of Exim are strongly encouraged to create a server certificate
2273 at installation time.
2275 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2276 with the $config_file variable.
2278 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2279 in transport context, after the attempt, and per-recipient. The latter type
2280 is per host attempted. The event data is the error message, and the errno
2281 information encodes the lookup type (A vs. MX) used for the (first) host,
2282 and the trailing two digits of the smtp 4xx response.
2284 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2285 to write to mainlog (or rejectlog, paniclog) in the window between file
2286 creation and permissions/ownership being changed. Particularly affects
2287 installations where exicyclog is run as root, rather than exim user;
2288 result is that the running daemon panics and dies.
2290 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2292 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2293 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2294 "pri" and "weight". Note that the previous implicit priority given by the
2295 list order is no longer honoured.
2297 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2298 for DKIM processing.
2300 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2301 by defining SUPPORT_SOCKS.
2303 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2304 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2305 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2306 variables are renamed to proxy_{local,external}_{address,port}.
2308 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2309 for a build by defining SUPPORT_I18N
2311 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2312 of the query string, and make ${quote_redis:} do that quoting.
2314 JH/29 Move Events support from Experimental to mainline, enabled by default
2315 and removable for a build by defining DISABLE_EVENT.
2317 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2319 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2320 cached by the daemon.
2322 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2323 by defining LOOKUP_REDIS. The libhiredis library is required.
2325 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2326 keys are given for lookup.
2328 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2329 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2330 only supported when built with TLS support. The PolarSSL SHA routines
2331 are still used when the TLS library is too old for convenient support.
2333 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2334 openssl_options), for security. OpenSSL forces this from version 1.1.0
2335 server-side so match that on older versions.
2337 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2338 allocation for $value could be released as the expansion processing
2339 concluded, but leaving the global pointer active for it.
2341 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2342 and to use the domains and local_parts ACL conditions.
2344 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2345 incorrectly not doubled on cutthrough transmission, hence seen as a
2346 body-termination at the receiving system - resulting in truncated mails.
2347 Commonly the sender saw a TCP-level error, and retransmitted the message
2348 via the normal store-and-forward channel. This could result in duplicates
2349 received - but deduplicating mailstores were liable to retain only the
2350 initial truncated version.
2352 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2354 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2356 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2357 we're in there, support oversigning also; bug 1309.
2359 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2361 HS/04 Add support for keep_environment and add_environment options.
2363 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2364 either intentional arithmetic overflow during PRNG, or testing config-
2367 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2368 delivery resulted in actual delivery. Cancel cutthrough before DATA
2371 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2372 rejects a recipient: pass the reject to the originator.
2374 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2375 Many were false-positives and ignorable, but it's worth fixing the
2378 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2379 for the new environment-manipulation done at startup. Move the routines
2380 from being local to tls.c to being global via the os.c file.
2382 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2383 an extract embedded as result-arg for a map, the first arg for extract
2384 is unavailable so we cannot tell if this is a numbered or keyed
2385 extraction. Accept either.
2391 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2394 JH/02 The smtp transport option "multi_domain" is now expanded.
2396 JH/03 The smtp transport now requests PRDR by default, if the server offers
2399 JH/04 Certificate name checking on server certificates, when exim is a client,
2400 is now done by default. The transport option tls_verify_cert_hostnames
2401 can be used to disable this per-host. The build option
2402 EXPERIMENTAL_CERTNAMES is withdrawn.
2404 JH/05 The value of the tls_verify_certificates smtp transport and main options
2405 default to the word "system" to access the system default CA bundle.
2406 For GnuTLS, only version 3.0.20 or later.
2408 JH/06 Verification of the server certificate for a TLS connection is now tried
2409 (but not required) by default. The verification status is now logged by
2410 default, for both outbound TLS and client-certificate supplying inbound
2413 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2416 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2417 Status Notification (bounce) messages are now MIME format per RFC 3464.
2418 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2419 under the control of the dsn_advertise_hosts option, and routers may
2420 have a dsn_lasthop option.
2422 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2423 default, modifiable by a malware= option. The list separator for
2424 the options can now be changed in the usual way. Bug 68.
2426 JH/10 The smtp_receive_timeout main option is now expanded before use.
2428 JH/11 The incoming_interface log option now also enables logging of the
2429 local interface on delivery outgoing connections.
2431 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2432 if the interface and destination host and port all match.
2434 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2437 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2438 Patch from Andrew Lewis.
2440 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2441 now supports optional time-restrictions, weighting, and priority
2442 modifiers per server. Patch originally by <rommer@active.by>.
2444 JH/16 The spamd_address main option now supports a mixed list of local
2445 and remote servers. Remote servers can be IPv6 addresses, and
2446 specify a port-range.
2448 JH/17 Bug 68: The spamd_address main option now supports an optional
2449 timeout value per server.
2451 JH/18 Bug 1581: Router and transport options headers_add/remove can
2452 now have the list separator specified.
2454 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2457 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2460 JH/21 Support for the A6 type of dns record is withdrawn.
2462 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2463 rather than the verbs used.
2465 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2466 from 255 to 1024 chars.
2468 JH/24 Verification callouts now attempt to use TLS by default.
2470 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2471 are generic router options now. The defaults didn't change.
2473 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2474 Original patch from Alexander Shikoff, worked over by JH.
2476 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2477 files if ZCAT_COMMAND is not executable.
2479 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2481 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2483 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2484 Normally benign, it bites when the pair was led to by a CNAME;
2485 modern usage is to not canonicalize the domain to a CNAME target
2486 (and we were inconsistent anyway for A-only vs AAAA+A).
2488 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2490 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2491 when evaluating $sender_host_dnssec.
2493 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2494 $sender_helo_dnssec variable.
2496 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2498 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2500 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2502 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2503 documented as working, but never had. Support all but $spam_report.
2505 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2506 added for tls authenticator.
2508 HS/03 Add perl_taintmode main config option
2514 TL/01 When running the test suite, the README says that variables such as
2515 no_msglog_check are global and can be placed anywhere in a specific
2516 test's script, however it was observed that placement needed to be near
2517 the beginning for it to behave that way. Changed the runtest perl
2518 script to read through the entire script once to detect and set these
2519 variables, reset to the beginning of the script, and then run through
2520 the script parsing/test process like normal.
2522 TL/02 The BSD's have an arc4random API. One of the functions to induce
2523 adding randomness was arc4random_stir(), but it has been removed in
2524 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2525 function when detected.
2527 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2528 cause callback expansion.
2530 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2531 syntax errors in an expansion can be treated as a string instead of
2532 logging or causing an error, due to the internal use of bool_lax
2533 instead of bool when processing it.
2535 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2536 server certificates when making smtp deliveries.
2538 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2540 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2542 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2544 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2545 Merged patch from Sebastian Wiedenroth.
2547 JH/05 Fix results-pipe from transport process. Several recipients, combined
2548 with certificate use, exposed issues where response data items split
2549 over buffer boundaries were not parsed properly. This eventually
2550 resulted in duplicates being sent. This issue only became common enough
2551 to notice due to the introduction of connection certificate information,
2552 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2554 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2555 size buffer was used, resulting in syntax errors when an expansion
2558 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2559 version 3.3.6 or later.
2561 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2562 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2563 both become "event_action", the variables become $event_name, $event_data
2564 and $event_defer_errno. There is a new variable $verify_mode, usable in
2565 routers, transports and related events. The tls:cert event is now also
2566 raised for inbound connections, if the main configuration event_action
2569 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2570 early OCSP support, but no stapling (appears to be less than 1.0.0).
2572 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2573 server certificate names available under the smtp transport option
2574 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2577 JH/10 Time-related extraction expansions from certificates now use the main
2578 option "timezone" setting for output formatting, and are consistent
2579 between OpenSSL and GnuTLS compilations. Bug 1541.
2581 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2582 encoded parameter in the incoming message. Bug 1558.
2584 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2585 include certificate info, eximon was claiming there were spoolfile
2588 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2590 JH/14 Log delivery-related information more consistently, using the sequence
2591 "H=<name> [<ip>]" wherever possible.
2593 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2594 are problematic for Debian distribution, omit them from the release
2597 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2599 JH/16 Fix string representation of time values on 64bit time_t architectures.
2602 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2603 output list separator was used.
2608 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2609 checkers that were complaining about end of non-void function with no
2612 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2613 This was a regression introduced in 4.83 by another bugfix.
2615 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2617 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2618 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2624 TF/01 Correctly close the server side of TLS when forking for delivery.
2626 When a message was received over SMTP with TLS, Exim failed to clear up
2627 the incoming connection properly after forking off the child process to
2628 deliver the message. In some situations the subsequent outgoing
2629 delivery connection happened to have the same fd number as the incoming
2630 connection previously had. Exim would try to use TLS and fail, logging
2631 a "Bad file descriptor" error.
2633 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2634 utilities have not been installed.
2636 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2637 temporary space as the ACL may create new global variables.
2639 TL/01 LDAP support uses per connection or global context settings, depending
2640 upon the detected version of the libraries at build time.
2642 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2643 to extract and use the src ip:port in logging and expansions as if it
2644 were a direct connection from the outside internet. PPv2 support was
2645 updated based on HAProxy spec change in May 2014.
2647 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2649 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2650 Properly escape header and check for NULL return.
2652 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2655 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2657 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2658 characters in header names, implemented as a verify condition.
2659 Contributed by Michael Fischer v. Mollard.
2661 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2662 results permerror and temperror. Previous values are deprecated but
2663 still accepted. In a future release, err_perm and err_temp will be
2664 completely removed, which will be a backward incompatibility if the
2665 ACL tests for either of these two old results. Patch contributed by
2666 user bes-internal on the mailing list.
2668 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2670 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2671 selectors, in both main and reject logs.
2673 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2676 JH/07 Add malware type "sock" for talking to simple daemon.
2678 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2680 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2681 routers/transports under cutthrough routing.
2683 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2684 numbers. Touch up "bool" conditional to keep the same definition.
2686 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2688 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2690 JH/12 Expand items in router/transport headers_add or headers_remove lists
2691 individually rather than the list as a whole. Bug 1452.
2693 Required for reasonable handling of multiple headers_ options when
2694 they may be empty; requires that headers_remove items with embedded
2695 colons must have them doubled (or the list-separator changed).
2697 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2698 view the policy declared in the DMARC record. Currently, $dmarc_status
2699 is a combined value of both the record presence and the result of the
2702 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2704 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2705 dnslookup router and the smtp transport (applying to the forward
2708 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2709 of ldap servers used for a specific lookup. Patch provided by Heiko
2712 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2713 New variable $lookup_dnssec_authenticated for observability.
2715 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2716 Patch submitted by Lars Timman.
2718 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2720 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2721 Requires trusted mode and valid format message id, aborts otherwise.
2722 Patch contributed by Heiko Schlichting.
2724 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2725 certextract with support for various fields. Bug 1358.
2727 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2728 is requested by default, modifiable by smtp transport option
2731 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2732 operate on certificate variables to give certificate fingerprints
2733 Also new ${sha256:cert_variable}.
2735 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2737 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2738 Christian Aistleitner.
2740 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2742 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2743 file. Patch from Wolfgang Breyha.
2745 JH/25 Expand the coverage of the delivery $host and $host_address to
2746 client authenticators run in verify callout. Bug 1476.
2748 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2749 align with daemon_smtp_ports. Bug 72.
2751 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2752 support and error reporting did not work properly.
2754 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2755 and is readable. Patch from Andrew Colin Kissa.
2757 TL/14 Enhance documentation of ${run expansion and how it parses the
2758 commandline after expansion, particularly in the case when an
2759 unquoted variable expansion results in an empty value.
2761 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2763 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2764 by renaming away from it. Addresses GH issue 15, reported by
2767 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2769 TL/15 SECURITY: prevent double expansion in math comparison functions
2770 (can expand unsanitized data). Not remotely exploitable.
2777 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2779 PP/02 Make -n do something, by making it not do something.
2780 When combined with -bP, the name of an option is not output.
2782 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2785 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2786 $sender_host_name and config options to manage this, and basic check
2789 PP/05 DSCP support for outbound connections and control modifier for inbound.
2791 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2792 (Only plugin which currently uses this is kerberos4, which nobody should
2793 be using, but we should make it available and other future plugins might
2794 conceivably use it, even though it would break NAT; stuff *should* be
2795 using channel bindings instead).
2797 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2798 name; added for Sendmail compatibility; requires admin caller.
2799 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2800 just ignore it); requires trusted caller.
2801 Also parse but ignore: -Ac -Am -X<logfile>
2804 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2806 TL/02 Add +smtp_confirmation as a default logging option.
2808 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2809 Patch by Magnus Holmgren from 2007-02-20.
2811 TL/04 Bugzilla 1281 - Spec typo.
2812 Bugzilla 1283 - Spec typo.
2813 Bugzilla 1290 - Spec grammar fixes.
2815 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2817 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2819 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2820 mailing list by by Dmitry Isaikin.
2822 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2824 JH/02 Support "G" suffix to numbers in ${if comparisons.
2826 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2828 NM/01 Bugzilla 1197 - Spec typo
2829 Bugzilla 1196 - Spec examples corrections
2831 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2833 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2834 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2837 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2838 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2840 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2841 "acl {{name}{arg}...}", and optional args on acl condition
2844 JH/05 Permit multiple router/transport headers_add/remove lines.
2846 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2848 JH/07 Avoid using a waiting database for a single-message-only transport.
2849 Performance patch from Paul Fisher. Bugzilla 1262.
2851 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2854 JH/09 Add $headers_added variable, with content from use of ACL modifier
2855 add_header (but not yet added to the message). Bugzilla 199.
2857 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2858 Pulled from Bugzilla 817 by Wolfgang Breyha.
2860 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2862 (nb: this is the same fix as in Exim 4.80.1)
2864 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2867 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2870 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2872 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2873 advertise SMTP AUTH mechanism to us, instead of a generic
2874 protocol violation error. Also, make Exim more robust to bad
2875 data from the Dovecot auth socket.
2877 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2879 When a queue runner is handling a message, Exim first routes the
2880 recipient addresses, during which it prunes them based on the retry
2881 hints database. After that it attempts to deliver the message to
2882 any remaining recipients. It then updates the hints database using
2885 So if a recipient address works intermittently, it can get repeatedly
2886 deferred at routing time. The retry hints record remains fresh so the
2887 address never reaches the final cutoff time.
2889 This is a fairly common occurrence when a user is bumping up against
2890 their storage quota. Exim had some logic in its local delivery code
2891 to deal with this. However it did not apply to per-recipient defers
2892 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2894 This change adds a proper retry rule check during routing so that the
2895 final cutoff time is checked against the message's age. We only do
2896 this check if there is an address retry record and there is not a
2897 domain retry record; this implies that previous attempts to handle
2898 the address had the retry_use_local_parts option turned on. We use
2899 this as an approximation for the destination being like a local
2900 delivery, as in LMTP.
2902 I suspect this new check makes the old local delivery cutoff check
2903 redundant, but I have not verified this so I left the code in place.
2905 TF/02 Correct gecos expansion when From: is a prefix of the username.
2907 Test 0254 submits a message to Exim with the header
2911 When I ran the test suite under the user fanf2, Exim expanded
2912 the header to contain my full name, whereas it should have added
2913 a Resent-Sender: header. It erroneously treats any prefix of the
2914 username as equal to the username.
2916 This change corrects that bug.
2918 GF/01 DCC debug and logging tidyup
2919 Error conditions log to paniclog rather than rejectlog.
2920 Debug lines prefixed by "DCC: " to remove any ambiguity.
2922 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2924 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2925 Bug spotted by Jeremy Harris; was flawed since initial commit.
2926 Would have resulted in OCSP responses post-SNI triggering an Exim
2927 NULL dereference and crash.
2929 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2931 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2932 Bug detection, analysis and fix by Samuel Thibault.
2933 Bugzilla 1331, Debian bug #698092.
2935 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2937 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2938 Server implementation by Todd Lyons, client by JH.
2939 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2940 config variable "prdr_enable" controls whether the server
2941 advertises the facility. If the client requests PRDR a new
2942 acl_data_smtp_prdr ACL is called once for each recipient, after
2943 the body content is received and before the acl_smtp_data ACL.
2944 The client is controlled by both of: a hosts_try_prdr option
2945 on the smtp transport, and the server advertisement.
2946 Default client logging of deliveries and rejections involving
2947 PRDR are flagged with the string "PRDR".
2949 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2950 fclose(). Diagnosis by Todd Lyons.
2952 PP/17 Update configure.default to handle IPv6 localhost better.
2953 Patch by Alain Williams (plus minor tweaks).
2956 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2957 This is now consistent with GnuTLS, and is now documented: the
2958 previous undocumented portable approach to treating the option as
2959 unset was to force an expansion failure. That still works, and
2960 an empty string is now equivalent.
2962 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2963 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2964 not performing validation itself.
2966 PP/20 Added force_command boolean option to pipe transport.
2967 Patch from Nick Koston, of cPanel Inc.
2969 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2972 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2974 PP/21 Fix eximon continuous updating with timestamped log-files.
2975 Broken in a format-string cleanup in 4.80, missed when I repaired the
2976 other false fix of the same issue.
2977 Report and fix from Heiko Schlichting.
2980 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2981 Report from Prashanth Katuri.
2983 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2984 It's SecureTransport, so affects any MacOS clients which use the
2985 system-integrated TLS libraries, including email clients.
2987 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2988 using a MIME ACL for non-SMTP local injection.
2989 Report and assistance in diagnosis by Warren Baker.
2991 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2993 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2995 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2996 last id that failed so it may be referenced in subsequent ACL's.
2998 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
3001 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
3002 ldap library initialization, allowing self-signed CA's to be
3003 used. Also properly sets require_cert option later in code by
3004 using NULL (global ldap config) instead of ldap handle (per
3005 session). Bug diagnosis and testing by alxgomz.
3007 TL/12 Enhanced documentation in the ratelimit.pl script provided in
3008 the src/util/ subdirectory.
3010 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
3011 renamed to Transport Post Delivery Action by Jeremy Harris, as
3014 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
3015 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
3016 redis_servers = needs to be configured which will be used by the redis
3017 lookup. Patch from Warren Baker, of The Packet Hub.
3019 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3021 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3022 hostname or reverse DNS when processing a host list. Used suggestions
3023 from multiple comments on this bug.
3025 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3027 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3028 Missed a few lines, added it to make the runtest require no keyboard
3031 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3032 contains upper case chars. Make router use caseful_local_part.
3034 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3035 support when GnuTLS has been built with p11-kit.
3041 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3043 This, or similar/improved, will also be change PP/11 of 4.82.
3049 PP/01 Handle short writes when writing local log-files.
3050 In practice, only affects FreeBSD (8 onwards).
3051 Bugzilla 1053, with thanks to Dmitry Isaikin.
3053 NM/01 Bugzilla 949 - Documentation tweak
3055 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3058 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3060 PP/02 Implemented gsasl authenticator.
3062 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3064 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3065 `pkg-config foo` for cflags/libs.
3067 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3068 with rest of GSASL and with heimdal_gssapi.
3070 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3071 `pkg-config foo` for cflags/libs for the TLS implementation.
3073 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3074 properties get this fed in as external SSF. A number of robustness
3075 and debugging improvements to the cyrus_sasl authenticator.
3077 PP/08 cyrus_sasl server now expands the server_realm option.
3079 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3080 Patch by Jeremy Harris.
3082 PP/10 Added dbmjz lookup type.
3084 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3086 PP/12 MAIL args handles TAB as well as SP, for better interop with
3087 non-compliant senders.
3088 Analysis and variant patch by Todd Lyons.
3090 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3091 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3092 Patch from Dirk Mueller <dmueller@suse.com>
3094 PP/13 tls_peerdn now print-escaped for spool files.
3095 Observed some $tls_peerdn in wild which contained \n, which resulted
3096 in spool file corruption.
3098 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3099 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3100 or write after TLS renegotiation, which otherwise led to messages
3103 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3104 as a tracking header (ie: a signed header comes before the signature).
3105 Patch from Wolfgang Breyha.
3107 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3108 comma-sep list; embedded commas doubled.
3110 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3112 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3114 Report and patch from Dmitry Banschikov.
3116 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3117 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3118 failures. We appear to now support TLS1.1+ with Exim.
3120 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3121 lets Exim select keys and certificates based upon TLS SNI from client.
3122 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3123 before an outbound SMTP session. New log_selector, +tls_sni.
3125 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3126 NULL dereference. Report and patch from Alun Jones.
3128 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3129 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3130 Not seeing resolver debug output on NetBSD, but suspect this is a
3131 resolver implementation change.
3133 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3134 Left warnings. Added "eximon gdb" invocation mode.
3136 PP/21 Defaulting "accept_8bitmime" to true, not false.
3138 PP/22 Added -bw for inetd wait mode support.
3140 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3141 locate the relevant includes and libraries. Made this the default.
3143 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3144 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3146 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3147 This may cause build issues on older platforms.
3149 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3150 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3151 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3152 Added SNI support via GnuTLS too.
3153 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3155 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3157 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3158 Applied second patch from Janne, implementing suggestion to default
3159 multiple-strings-in-record handling to match SPF spec.
3161 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3163 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3164 read-only, out of scope).
3165 Patch from Wolfgang Breyha, report from Stuart Northfield.
3167 PP/29 Fix three issues highlighted by clang analyser static analysis.
3168 Only crash-plausible issue would require the Cambridge-specific
3169 iplookup router and a misconfiguration.
3170 Report from Marcin Mirosław.
3172 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3174 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3175 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3176 As part of this, removing so much warning spew let me fix some minor
3177 real issues in debug logging.
3179 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3180 assignment on my part. Fixed.
3182 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3183 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3184 Janne Snabb (who went above and beyond: thank you).
3186 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3187 string otherwise requires a connection and a bunch more work and it's
3188 relatively easy to get wrong. Should also expose TLS library linkage
3191 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3192 64-bit ${eval} (JH/03).
3194 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3195 GNU libc to support some of the 64-bit stuff, should not lead to
3196 conflicts. Defined before os.h is pulled in, so if a given platform
3197 needs to override this, it can.
3199 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3200 protection layer was required, which is not implemented.
3201 Bugzilla 1254, patch from Wolfgang Breyha.
3203 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3204 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3205 tls_dhparam take prime identifiers. Also unbreak combination of
3206 OpenSSL+DH_params+TLSSNI.
3208 PP/39 Disable SSLv2 by default in OpenSSL support.
3214 PP/01 Solaris build fix for Oracle's LDAP libraries.
3215 Bugzilla 1109, patch from Stephen Usher.
3217 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3219 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3222 TF/02 Fix a couple more cases where we did not log the error message
3223 when unlink() failed. See also change 4.74-TF/03.
3225 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3226 lock up or crash if it happened to be inside a call to libc when it
3227 got a SIGUSR1 from exiwhat.
3229 The SIGUSR1 handler appends the current process status to the process
3230 log which is later printed by exiwhat. It used to use the general
3231 purpose logging code to do this, but several functions it calls are
3232 not safe for signals.
3234 The new output code in the SIGUSR1 handler is specific to the process
3235 log, and simple enough that it's easy to inspect for signal safety.
3236 Removing some special cases also simplifies the general logging code.
3237 Removing the spurious timestamps from the process log simplifies
3240 TF/04 Improved ratelimit ACL condition.
3242 The /noupdate option has been deprecated in favour of /readonly which
3243 has clearer semantics. The /leaky, /strict, and /readonly update modes
3244 are mutually exclusive. The update mode is no longer included in the
3245 database key; it just determines when the database is updated. (This
3246 means that when you upgrade Exim will forget old rate measurements.)
3248 Exim now checks that the per_* options are used with an update mode that
3249 makes sense for the current ACL. For example, when Exim is processing a
3250 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3251 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3252 must specify per_mail/readonly. If you omit the update mode it defaults to
3253 /leaky where that makes sense (as before) or /readonly where required.
3255 The /noupdate option is now undocumented but still supported for
3256 backwards compatibility. It is equivalent to /readonly except that in
3257 ACLs where /readonly is required you may specify /leaky/noupdate or
3258 /strict/noupdate which are treated the same as /readonly.
3260 A useful new feature is the /count= option. This is a generalization
3261 of the per_byte option, so that you can measure the throughput of other
3262 aggregate values. For example, the per_byte option is now equivalent
3263 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3265 The per_rcpt option has been generalized using the /count= mechanism
3266 (though it's more complicated than the per_byte equivalence). When it is
3267 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3268 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3269 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3270 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3271 Note that using per_rcpt with a non-readonly update mode in more than
3272 one ACL will cause the recipients to be double-counted. (The per_mail
3273 and per_byte options don't have this problem.)
3275 The handling of very low rates has changed slightly. If the computed rate
3276 is less than the event's count (usually one) then this event is the first
3277 after a long gap. In this case the rate is set to the same as this event's
3278 count, so that the first message of a spam run is counted properly.
3280 The major new feature is a mechanism for counting the rate of unique
3281 events. The new per_addr option counts the number of different
3282 recipients that someone has sent messages to in the last time period. It
3283 behaves like per_rcpt if all the recipient addresses are different, but
3284 duplicate recipient addresses do not increase the measured rate. Like
3285 the /count= option this is a general mechanism, so the per_addr option
3286 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3287 example, measure the rate that a client uses different sender addresses
3288 with the options per_mail/unique=$sender_address. There are further
3289 details in the main documentation.
3291 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3293 TF/06 Removed a few PCRE remnants.
3295 TF/07 Automatically extract Exim's version number from tags in the git
3296 repository when doing development or release builds.
3298 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3299 Bugzilla 879. Patch from Paul Fisher.
3301 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3302 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3305 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3307 PP/05 Variable $av_failed, true if the AV scanner deferred.
3308 Bugzilla 1078. Patch from John Horne.
3310 PP/06 Stop make process more reliably on build failure.
3311 Bugzilla 1087. Patch from Heiko Schlittermann.
3313 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3314 Bugzilla 1089. Patch from Heiko Schlittermann.
3316 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3317 Bugzilla 1131. Patch from Holger Weiß.
3319 PP/09 Handle IPv6 addresses with SPF.
3320 Bugzilla 860. Patch from Wolfgang Breyha.
3322 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3324 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3327 PP/11 match_* no longer expand right-hand-side by default.
3328 New compile-time build option, EXPAND_LISTMATCH_RHS.
3329 New expansion conditions, "inlist", "inlisti".
3331 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3333 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3335 PP/14 fix log_write() format string regression from TF/03.
3336 Bugzilla 1152. Patch from Dmitry Isaikin.
3342 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3344 PP/02 Harmonised TLS library version reporting; only show if debugging.
3345 Layout now matches that introduced for other libraries in 4.74 PP/03.
3347 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3349 PP/04 New "dns_use_edns0" global option.
3351 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3354 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3355 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3357 TK/01 Updated PolarSSL code to 0.14.2.
3358 Bugzilla 1097. Patch from Andreas Metzler.
3360 PP/07 Catch divide-by-zero in ${eval:...}.
3361 Fixes bugzilla 1102.
3363 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3366 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3367 format-string attack -- SECURITY: remote arbitrary code execution.
3369 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3370 time unintentionally subject to list matching rules, letting the header
3371 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3372 arbitrary string expansion). This allowed for information disclosure.
3374 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3375 INT_MIN/-1 -- value coerced to INT_MAX.
3381 NM/01 Workaround for PCRE version dependency in version reporting
3384 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3385 This fixes portability to compilers other than gcc, notably
3386 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3388 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3389 makefiles for portability to HP-UX and POSIX correctness.
3391 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3392 Also via indented variable definition in the Makefile.
3393 (Debugging by Oliver Heesakkers).
3395 PP/02 Restore caching of spamd results with expanded spamd_address.
3396 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3398 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3399 Improves build reliability. Fix from: Frank Elsner
3401 NM/02 Fix wide character breakage in the rfc2047 coding
3402 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3404 NM/03 Allow underscore in dnslist lookups
3405 Fixes bug 1026. Patch from Graeme Fowler
3407 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3408 Code patches from Adam Ciarcinski of NetBSD.
3410 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3413 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3414 is logged, to avoid truncation. Patch from John Horne.
3416 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3417 Patch from Jakob Hirsch.
3419 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3420 SQL string expansion failure details.
3421 Patch from Andrey Oktyabrski.
3423 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3424 Patch from Simon Arlott.
3426 PP/09 New lookups functionality failed to compile on old gcc which rejects
3427 extern declarations in function scope.
3428 Patch from Oliver Fleischmann
3430 PP/10 Use sig_atomic_t for flags set from signal handlers.
3431 Check getgroups() return and improve debugging.
3432 Fixed developed for diagnosis in bug 927 (which turned out to be
3435 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3436 Patch from Mark Zealey.
3438 PP/12 Bugzilla 1056: Improved spamd server selection.
3439 Patch from Mark Zealey.
3441 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3442 Based on patch from Heiko Schlittermann.
3444 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3445 Patch from Uwe Doering, sign-off by Michael Haardt.
3447 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3448 variable declaration deep within a block. Bug and patch from
3451 PP/15 lookups-Makefile IRIX compatibility coercion.
3453 PP/16 Make DISABLE_DKIM build knob functional.
3455 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3456 Patch by Simon Arlott
3458 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3459 variable argument macros. Our copy now differs from upstream.
3465 TF/01 Failure to get a lock on a hints database can have serious
3466 consequences so log it to the panic log.
3468 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3469 controlled using the smtp_confirmation log selector.
3471 TF/03 Include the error message when we fail to unlink a spool file.
3473 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3474 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3475 for maintaining out-of-tree patches for some time.
3477 PP/01 Bugzilla 139: Documentation and portability issues.
3478 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3479 Handle per-OS dynamic-module compilation flags.
3481 PP/02 Let /dev/null have normal permissions.
3482 The 4.73 fixes were a little too stringent and complained about the
3483 permissions on /dev/null. Exempt it from some checks.
3484 Reported by Andreas M. Kirchwitz.
3486 PP/03 Report version information for many libraries, including
3487 Exim version information for dynamically loaded libraries. Created
3488 version.h, now support a version extension string for distributors
3489 who patch heavily. Dynamic module ABI change.
3491 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3492 privilege escalation vulnerability whereby the Exim run-time user
3493 can cause root to append content of the attacker's choosing to
3496 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3499 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3500 If dropping privileges for untrusted macros, we disabled normal logging
3501 on the basis that it would fail; for the Exim run-time user, this is not
3502 the case, and it resulted in successful deliveries going unlogged.
3503 Fixed. Reported by Andreas Metzler.
3509 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3510 only prepend for the Resent-* case. Fixes regression introduced in
3511 Exim 4.70 by NM/22 for Bugzilla 607.
3513 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3514 increasing numbers of administrators be bitten by this.
3516 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3518 PP/03 Bugzilla 994: added openssl_options main configuration option.
3520 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3522 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3524 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3526 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3527 without a peer certificate, leading to a segfault because of an
3528 assumption that peers always have certificates. Be a little more
3529 paranoid. Problem reported by Martin Tscholak.
3531 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3532 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3533 NB: ClamAV planning to remove STREAM in "middle of 2010".
3534 CL also introduces -bmalware, various -d+acl logging additions and
3535 more caution in buffer sizes.
3537 PP/09 Implemented reverse_ip expansion operator.
3539 PP/10 Bugzilla 937: provide a "debug" ACL control.
3541 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3543 PP/12 Bugzilla 973: Implement --version.
3545 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3547 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3549 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3551 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3552 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3553 ignore trailing whitespace.
3555 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3557 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3560 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3561 Notification from Dr Andrew Aitchison.
3563 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3564 ExtendedDetectionInfo response format.
3565 Notification from John Horne.
3567 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3570 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3571 XSL and documented dependency on system catalogs, with examples of how
3574 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3577 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3578 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3579 configuration file which is writeable by the Exim user or group.
3581 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3582 of configuration files to cover files specified with the -C option if
3583 they are going to be used with root privileges, not just the default
3586 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3587 option (effectively making it always true).
3589 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3590 files to be used while preserving root privileges.
3592 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3593 that rogue child processes cannot use them.
3595 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3596 run-time user, instead of root.
3598 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3599 Exim run-time user without dropping privileges.
3601 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3602 result string, instead of calling string_vformat() twice with the same
3605 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3606 for other users. Others should always drop root privileges if they use
3607 -C on the command line, even for a whitelisted configure file.
3609 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3611 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3617 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3618 $data_path, and $header_path variables; fixed documentation bugs and
3621 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3622 exipick to access non-standard spools, including the "frozen" queue
3625 NM/01 Bugzilla 965: Support mysql stored procedures.
3626 Patch from Alain Williams
3628 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3630 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3631 Patch from Andreas Metzler
3633 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3634 Patch from Kirill Miazine
3636 NM/05 Bugzilla 671: Added umask to procmail example.
3638 JJ/03 installed exipick 20100323.0, fixing doc bug
3640 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3641 directory. Notification and patch from Dan Rosenberg.
3643 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3645 TK/02 Improve log output when DKIM signing operation fails.
3647 MH/01 Treat the transport option dkim_domain as a colon separated
3648 list, not as a single string, and sign the message with each element,
3649 omitting multiple occurences of the same signer.
3651 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3652 Bugzilla 985, 986. Patch by Simon Arlott
3654 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3655 Patch by Simon Arlott
3657 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3658 MBX locking. Notification from Dan Rosenberg.
3664 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3666 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3668 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3670 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3672 NM/04 Bugzilla 915: Flag broken perl installation during build.
3678 TK/01 Added patch by Johannes Berg that expands the main option
3679 "spamd_address" if it starts with a dollar sign.
3681 TK/02 Write list of recipients to X-Envelope-Sender header when building
3682 the mbox-format spool file for content scanning (suggested by Jakob
3685 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3686 (http://www.dcc-servers.net/) support via dccifd. Activated by
3687 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3689 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3690 by Mark Daniel Reidel <mr@df.eu>.
3692 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3693 When building exim an external PCRE library is now needed -
3694 PCRE is a system library on the majority of modern systems.
3695 See entry on PCRE_LIBS in EDITME file.
3697 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3698 conversation. Added nologin parameter to request.
3699 Patch contributed by Kirill Miazine.
3701 TF/01 Do not log submission mode rewrites if they do not change the address.
3703 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3705 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3706 log files in place. Contributed by Roberto Lima.
3708 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3710 TF/03 Bugzilla 615: When checking the local_parts router precondition
3711 after a local_part_suffix or local_part_prefix option, Exim now
3712 does not use the address's named list lookup cache, since this
3713 contains cached lookups for the whole local part.
3715 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3716 Robert Millan. Documentation is in experimental-spec.txt.
3718 TF/04 Bugzilla 668: Fix parallel build (make -j).
3720 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3722 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3723 Patch provided by Jan Srzednicki.
3725 TF/05 Leading white space used to be stripped from $spam_report which
3726 wrecked the formatting. Now it is preserved.
3728 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3729 that they are available at delivery time.
3731 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3733 TF/08 TLS error reporting now respects the incoming_interface and
3734 incoming_port log selectors.
3736 TF/09 Produce a more useful error message if an SMTP transport's hosts
3737 setting expands to an empty string.
3739 NM/06 Bugzilla 744: EXPN did not work under TLS.
3740 Patch provided by Phil Pennock.
3742 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3743 Patch provided by Richard Godbee.
3745 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3746 acl_smtp_notquit, added index entry.
3748 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3749 Patch provided by Eugene Bujak.
3751 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3752 accept(). Patch provided by Maxim Dounin.
3754 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3755 Patch provided by Phil Pennock.
3757 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3759 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3760 Patch provided by Brad "anomie" Jorsch.
3762 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3763 Patch provided by Dean Brooks.
3765 TK/05 Add native DKIM support (does not depend on external libraries).
3767 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3768 Patch provided by Graeme Fowler.
3770 NM/16 Bugzilla 851: Documentation example syntax fix.
3772 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3774 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3777 NM/19 Bugzilla 745: TLS version reporting.
3778 Patch provided by Phil Pennock.
3780 NM/20 Bugzilla 167: bool: condition support.
3781 Patch provided by Phil Pennock.
3783 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3784 clients. Patch provided by Phil Pennock.
3786 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3787 Patch provided by Brad "anomie" Jorsch.
3789 NM/23 Bugzilla 687: Fix misparses in eximstats.
3790 Patch provided by Heiko Schlittermann.
3792 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3793 Patch provided by Heiko Schlittermann.
3795 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3796 plus update to original patch.
3798 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3800 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3801 Patch provided by David Brownlee.
3803 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3805 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3807 NM/30 Bugzilla 888: TLS documentation bugfixes.
3809 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3811 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3812 Unlike the original bugzilla I have changed all shell scripts in src tree.
3814 NM/33 Bugzilla 898: Transport filter timeout fix.
3815 Patch by Todd Rinaldo.
3817 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3818 Patch by Serge Demonchaux.
3820 NM/35 Bugzilla 39: Base64 decode bug fixes.
3821 Patch by Jakob Hirsch.
3823 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3825 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3827 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3829 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3835 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3836 ALT-N's libdkim that I have put here:
3837 http://duncanthrax.net/exim-experimental/
3839 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3840 were called 'true' and it seems that C99 defines that as a reserved
3841 keyword to be used with 'bool' variable types. That means you could
3842 not include C99-style headers which use bools without triggering
3843 build errors in sieve.c.
3845 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3846 as mailq or other aliases. Changed the --help handling significantly
3847 to do whats expected. exim_usage() emits usage/help information.
3849 SC/01 Added the -bylocaldomain option to eximstats.
3851 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3853 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3855 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3861 PH/01 Another patch from the Sieve maintainer.
3863 PH/02 When an IPv6 address is converted to a string for single-key lookup
3864 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3865 dots are used instead of colons so that keys in lsearch files need not
3866 contain colons. This was done some time before quoting was made available
3867 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3868 (notated using the quote facility) so as to distinguish them from IPv4
3869 keys. This meant that lookups for IP addresses in host lists did not work
3870 for iplsearch lookups.
3872 This has been fixed by arranging for IPv6 addresses to be expressed with
3873 colons if the lookup type is iplsearch. This is not incompatible, because
3874 previously such lookups could never work.
3876 The situation is now rather anomalous, since one *can* have colons in
3877 ordinary lsearch keys. However, making the change in all cases is
3878 incompatible and would probably break a number of configurations.
3880 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3883 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3884 conversion specification without a maximum field width, thereby enabling
3885 a rogue spamd server to cause a buffer overflow. While nobody in their
3886 right mind would setup Exim to query an untrusted spamd server, an
3887 attacker that gains access to a server running spamd could potentially
3888 exploit this vulnerability to run arbitrary code as the Exim user.
3890 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3891 $primary_hostname instead of what libspf2 thinks the hosts name is.
3893 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3894 a directory entry by the name of the lookup key. Previously, if a
3895 symlink pointed to a non-existing file or a file in a directory that
3896 Exim lacked permissions to read, a lookup for a key matching that
3897 symlink would fail. Now it is enough that a matching directory entry
3898 exists, symlink or not. (Bugzilla 503.)
3900 PH/03 The body_linecount and body_zerocount variables are now exported in the
3903 PH/04 Added the $dnslist_matched variable.
3905 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3906 This means they are set thereafter only if the connection becomes
3909 PH/06 Added the client_condition to authenticators so that some can be skipped
3910 by clients under certain conditions.
3912 PH/07 The error message for a badly-placed control=no_multiline_responses left
3913 "_responses" off the end of the name.
3915 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3917 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3918 (without spaces) instead of just copying the configuration text.
3920 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3922 PH/11 Added $max_received_linelength.
3924 PH/12 Added +ignore_defer and +include_defer to host lists.
3926 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3927 way in which PCRE > 7.0 is built.
3929 PH/14 Implemented queue_only_load_latch.
3931 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3932 MAIL command. The effect was to mangle the value on 64-bit systems.
3934 PH/16 Another patch from the Sieve maintainer.
3936 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3938 PH/18 If a system quota error occurred while trying to create the file for
3939 a maildir delivery, the message "Mailbox is full" was not appended to the
3940 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3941 only to a quota excession during the actual writing of the file.
3943 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3944 characters?) which causes problems in log lines. The DN values are now
3945 passed through string_printing() before being added to log lines.
3947 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3948 and InterBase are left for another time.)
3950 PH/21 Added message_body_newlines option.
3952 PH/22 Guard against possible overflow in moan_check_errorcopy().
3954 PH/23 POSIX allows open() to be a macro; guard against that.
3956 PH/24 If the recipient of an error message contained an @ in the local part
3957 (suitably quoted, of course), incorrect values were put in $domain and
3958 $local_part during the evaluation of errors_copy.
3964 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3965 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3968 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3969 issue a MAIL command.
3971 PH/02 In an ACL statement such as
3973 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3975 if a client was not listed at all, or was listed with a value other than
3976 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3977 the condition was not true (as it should be), so access was not denied.
3978 The bug was that the ! inversion was incorrectly passed on to the second
3979 item. This has been fixed.
3981 PH/03 Added additional dnslists conditions == and =& which are different from
3982 = and & when the dns lookup returns more than one IP address.
3984 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3985 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3987 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3988 FSYNC, which compiles an option called disable_fsync that allows for
3989 bypassing fsync(). The documentation is heavily laced with warnings.
3991 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3993 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3994 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3995 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3996 including adding "make clean"; (3) Added -fPIC when compiling the test
3997 dynamically loaded module, to get rid of a warning.
3999 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
4000 message fails, move_frozen_messages = true and ignore_bounce_errors_after
4001 = 0s. The bug is otherwise harmless.
4003 PH/07 There was a bug in the dovecot authenticator such that the value of
4004 $auth1 could be overwritten, and so not correctly preserved, after a
4005 successful authentication. This usually meant that the value preserved by
4006 the server_setid option was incorrect.
4008 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
4010 PH/09 Installed PCRE release 7.0.
4012 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
4013 run for batched SMTP input. It is now run at the start of every message
4014 in the batch. While fixing this I discovered that the process information
4015 (output by running exiwhat) was not always getting set for -bs and -bS
4016 input. This is fixed, and it now also says "batched" for BSMTP.
4018 PH/11 Added control=no_pipelining.
4020 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4021 patch, slightly modified), and move the expansion of helo_data till after
4022 the connection is made in the smtp transport (so it can use these
4025 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4027 PH/14 Added log_selector = +pid.
4029 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4031 PH/16 Add ${if forany and ${if forall.
4033 PH/17 Added dsn_from option to vary the From: line in DSNs.
4035 PH/18 Flush SMTP output before performing a callout, unless control =
4036 no_callout_flush is set.
4038 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4039 was true (the default) a successful delivery failed to delete the retry
4040 item, thus causing premature timeout of the address. The bug is now
4043 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4045 PH/21 Long custom messages for fakedefer and fakereject are now split up
4046 into multiline responses in the same way that messages for "deny" and
4047 other ACL rejections are.
4049 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4050 with slight modification.
4052 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4053 draft, changing the syntax and factoring some duplicate code".
4055 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4056 for deliveries of the second and subsequent messages over the same SMTP
4059 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4060 ${reduce, with only minor "tidies".
4062 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4064 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4065 expansion side effects.
4067 PH/27 When a message times out after an over-quota error from an Exim-imposed
4068 quota, the bounce message says "mailbox is full". This message was not
4069 being given when it was a system quota that was exceeded. It now should
4072 MH/03 Made $recipients available in local_scan(). local_scan() already has
4073 better access to the recipient list through recipients_list[], but
4074 $recipients can be useful in postmaster-provided expansion strings.
4076 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4077 in the case of a MAIL command with additional options following the
4078 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4079 were accidentally chopped off.
4081 PH/29 SMTP synchronization checks are implemented when a command is read -
4082 there is a check that no more input is waiting when there shouldn't be
4083 any. However, for some commands, a delay in an ACL can mean that it is
4084 some time before the response is written. In this time, more input might
4085 arrive, invalidly. So now there are extra checks after an ACL has run for
4086 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4087 pipelining has not been advertised.
4089 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4091 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4092 returned in the SMTP response when smtp_return_error_details was false.
4093 This has been fixed.
4095 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4096 instead of the C I/O that was originally supplied, because problems were
4097 reported on Solaris.
4099 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4100 Exim which did not show up earlier: it was assuming that a call to
4101 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4102 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4103 was a macro that became an assignment, so it seemed to work. This has
4104 changed to a proper function call with a void return, hence the compile
4105 error. Exim's code has been fixed.
4107 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4110 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4112 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4114 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4115 because it turns out to be too big or there is a timeout) there is no
4116 "Completed" line in the log. When some messages of this type were
4117 selected by exigrep, they were listed as "not completed". Others were
4118 picked up by some special patterns. I have improved the selection
4119 criteria to be more general.
4121 PH/38 The host_find_failed option in the manualroute router can now be set
4122 to "ignore", to completely ignore a host whose IP address cannot be
4123 found. If all hosts are ignored, the behaviour is controlled by the new
4124 host_all_ignored option.
4126 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4127 homing or because of multiple MX records with /mx) generated more than
4128 one IP address, and the following item turned out to be the local host,
4129 all the secondary addresses of the first item were incorrectly removed
4130 from the list, along with the local host and any following hosts (which
4131 is what is supposed to happen).
4133 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4134 whoever called Exim into the -H file. In the case of the daemon it was
4135 behaving confusingly. When first started, it used values for whoever
4136 started the daemon, but after a SIGHUP it used the Exim user (because it
4137 calls itself on a restart). I have changed the code so that it now always
4140 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4141 message are rejected with the same error (e.g. no authentication or bad
4142 sender address), and a DATA command is nevertheless sent (as can happen
4143 with PIPELINING or a stupid MUA), the error message that was given to the
4144 RCPT commands is included in the rejection of the DATA command. This is
4145 intended to be helpful for MUAs that show only the final error to their
4148 PH/42 Another patch from the Sieve maintainer.
4150 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4151 Eximstats - Fixed some broken HTML links and added missing column headers
4153 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4154 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4156 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4158 PH/43 Yet another patch from the Sieve maintainer.
4160 PH/44 I found a way to check for a TCP/IP connection going away before sending
4161 the response to the final '.' that terminates a message, but only in the
4162 case where the client has not sent further data following the '.'
4163 (unfortunately, this is allowed). However, in many cases there won't be
4164 any further data because there won't be any more messages to send. A call
4165 to select() can be used: if it shows that the input is "ready", there is
4166 either input waiting, or the socket has been closed. An attempt to read
4167 the next input character can distinguish the two cases. Previously, Exim
4168 would have sent an OK response which the client would never have see.
4169 This could lead to message repetition. This fix should cure that, at
4170 least in a lot of common cases.
4172 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4173 advertised in response to EHLO.
4179 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4180 fixed by 4.65/MH/01 (is this a record?) are fixed:
4182 (i) An empty string was always treated as zero by the numeric comparison
4183 operators. This behaviour has been restored.
4185 (ii) It is documented that the numeric comparison operators always treat
4186 their arguments as decimal numbers. This was broken in that numbers
4187 starting with 0 were being interpreted as octal.
4189 While fixing these problems I realized that there was another issue that
4190 hadn't been noticed. Values of message_size_limit (both the global option
4191 and the transport option) were treated as octal if they started with 0.
4192 The documentation was vague. These values are now always treated as
4193 decimal, and I will make that clear in the documentation.
4199 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4200 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4203 MH/01 Don't check that the operands of numeric comparison operators are
4204 integers when their expansion is in "skipping" mode (fixes bug
4205 introduced by 4.64-PH/07).
4207 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4208 child addresses, Exim now panics and dies. Previously, because the count
4209 is held in a short int, deliveries were likely to be lost. As such a
4210 large number of recipients for a single message is ridiculous
4211 (performance will be very, very poor), I have chosen to impose a limit
4212 rather than extend the field.
4218 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4219 leftover -K file (the existence of which was triggered by #402).
4220 While we were at it, introduced process PID as part of the -K
4221 filename. This should rule out race conditions when creating
4224 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4225 processing considerably. Previous code took too long for large mails,
4226 triggering a timeout which in turn triggers #401.
4228 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4229 in the DK code in transports.c. sendfile() is not really portable,
4230 hence the _LINUX specificness.
4232 TF/01 In the add_headers option to the mail command in an Exim filter,
4233 there was a bug that Exim would claim a syntax error in any
4234 header after the first one which had an odd number of characters
4237 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4238 callout verification, Exim cached a "reject" for the entire domain. This
4239 is correct for most verifications, but it is not correct for a recipient
4240 verification with use_sender or use_postmaster set, because in that case
4241 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4242 case of MAIL FROM:<> rejection from other early rejections (e.g.
4243 rejection of HELO). When verifying a recipient using a non-null MAIL
4244 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4245 Whatever the result of the callout, the value of the domain cache is
4246 left unchanged (for any other kind of callout, getting as far as trying
4247 RCPT means that the domain itself is ok).
4249 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4252 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4253 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4254 session, the daemon ignores ECONNECT errors and logs others; it now
4255 ignores EPIPE as well.
4257 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4258 (quoted-printable decoding).
4260 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4261 later the small subsequent patch to fix an introduced bug.
4263 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4265 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4267 PH/08 An error is now given if message_size_limit is specified negative.
4269 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4270 to be given (somewhat) arbitrary names.
4272 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4275 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4276 miscellaneous code fixes
4278 PH/10 Added the log_reject_target ACL modifier to specify where to log
4281 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4282 hostname. This is wrong, because it relates to the incoming message (and
4283 probably the interface on which it is arriving) and not to the outgoing
4284 callout (which could be using a different interface). This has been
4285 changed to use the value of the helo_data option from the smtp transport
4286 instead - this is what is used when a message is actually being sent. If
4287 there is no remote transport (possible with a router that sets up host
4288 addresses), $smtp_active_hostname is used.
4290 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4291 tweaks were necessary in order to get it to work (see also 21 below):
4292 (a) The code assumed that strncpy() returns a negative number on buffer
4293 overflow, which isn't the case. Replaced with Exim's string_format()
4295 (b) There were several signed/unsigned issues. I just did the minimum
4296 hacking in of casts. There is scope for a larger refactoring.
4297 (c) The code used strcasecmp() which is not a standard C function.
4298 Replaced with Exim's strcmpic() function.
4299 (d) The code set only $1; it now sets $auth1 as well.
4300 (e) A simple test gave the error "authentication client didn't specify
4301 service in request". It would seem that Dovecot has changed its
4302 interface. Fortunately there's a specification; I followed it and
4303 changed what the client sends and it appears to be working now.
4305 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4308 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4309 address A is aliased to B and C, where B exists and C does not. Without
4310 -v the output is "A verified" because verification stops after a
4311 successful redirection if more than one address is generated. However,
4312 with -v the child addresses are also verified. Exim was outputting "A
4313 failed to verify" and then showing the successful verification for C,
4314 with its parentage. It now outputs "B failed to verify", showing B's
4315 parentage before showing the successful verification of C.
4317 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4318 look up a TXT record in a specific list after matching in a combined
4321 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4322 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4323 they consult the DNS. I had assumed they would set it the way they
4324 wanted; and indeed my experiments on Linux seem to show that in some
4325 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4326 To be on the safe side, however, I have now made the interface to
4327 host_find_byname() similar to host_find_bydns(), with an argument
4328 containing the DNS resolver options. The host_find_byname() function now
4329 sets these options at its start, just as host_find_bydns() does. The smtp
4330 transport options dns_qualify_single and dns_search_parents are passed to
4331 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4332 of host_find_byname() use the default settings of RES_DEFNAMES
4333 (qualify_single) but not RES_DNSRCH (search_parents).
4335 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4336 spool_read_header() do less string testing, by means of a preliminary
4337 switch on the second character of optional "-foo" lines. (This is
4338 overdue, caused by the large number of possibilities that now exist.
4339 Originally there were few.) While I was there, I also converted the
4340 str(n)cmp tests so they don't re-test the leading "-" and the first
4341 character, in the hope this might squeeze out yet more improvement.
4343 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4344 flag allowing group syntax was set by the header_syntax check but not
4345 turned off, possible causing trouble later; (2) The flag was not being
4346 set at all for the header_verify test, causing "group"-style headers to
4347 be rejected. I have now set it in this case, and also caused header_
4348 verify to ignore an empty address taken from a group. While doing this, I
4349 came across some other cases where the code for allowing group syntax
4350 while scanning a header line wasn't quite right (mostly, not resetting
4351 the flag correctly in the right place). These bugs could have caused
4352 trouble for malformed header lines. I hope it is now all correct.
4354 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4355 with the "reply" argument non-NULL. The code, however (which originally
4356 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4357 but it didn't always do it. This confused somebody who was copying the
4358 code for some other use. I have removed all the tests.
4360 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4361 feature that was used to support insecure browsers during the U.S. crypto
4362 embargo. It requires special client support, and Exim is probably the
4363 only MTA that supported it -- and would never use it because real RSA is
4364 always available. This code has been removed, because it had the bad
4365 effect of slowing Exim down by computing (never used) parameters for the
4366 RSA_EXPORT functionality.
4368 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4369 authenticator to fail if there's a tab character in the incoming data
4370 (there should never be unless someone is messing about, as it's supposed
4371 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4372 if the connection is using TLS or if the remote IP is the same as the
4373 local IP, and the "valid-client-cert option" if a client certificate has
4376 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4377 authenticators. This can be used for authorization after authentication
4378 succeeds. (In the case of plaintext, it servers for both authentication
4381 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4382 if any retry times were supplied.
4384 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4385 connection, where there is no client IP address to check. In this
4386 situation, the verify now always succeeds.
4388 PH/25 Applied John Jetmore's -Mset patch.
4390 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4392 PH/27 In a string expansion for a processed (not raw) header when multiple
4393 headers of the same name were present, leading whitespace was being
4394 removed from all of them, but trailing whitespace was being removed only
4395 from the last one. Now trailing whitespace is removed from each header
4396 before concatenation. Completely empty headers in a concatenation (as
4397 before) are ignored.
4399 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4400 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4402 PH/29 [Removed. This was a change that I later backed out, and forgot to
4403 correct the ChangeLog entry (that I had efficiently created) before
4404 committing the later change.]
4406 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4407 address errors (4xx response to RCPT) over the same connection as other
4408 messages routed to the same hosts. Such deliveries are always "forced",
4409 so retry times are not inspected. This resulted in far too many retries
4410 for the affected addresses. The effect occurred only when there were more
4411 hosts than the hosts_max_try setting in the smtp transport when it had
4412 the 4xx errors. Those hosts that it had tried were not added to the list
4413 of hosts for which the message was waiting, so if all were tried, there
4414 was no problem. Two fixes have been applied:
4416 (i) If there are any address or message errors in an SMTP delivery, none
4417 of the hosts (tried or untried) are now added to the list of hosts
4418 for which the message is waiting, so the message should not be a
4419 candidate for sending over the same connection that was used for a
4420 successful delivery of some other message. This seems entirely
4421 reasonable: after all the message is NOT "waiting for some host".
4422 This is so "obvious" that I'm not sure why it wasn't done
4423 previously. Hope I haven't missed anything, but it can't do any
4424 harm, as the worst effect is to miss an optimization.
4426 (ii) If, despite (i), such a delivery is accidentally attempted, the
4427 routing retry time is respected, so at least it doesn't keep
4428 hammering the server.
4430 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4431 in ${readsocket because some servers need this prod.
4433 PH/32 Added some extra debug output when updating a wait-xxx database.
4435 PH/33 The hint "could be header name not terminated by colon", which has been
4436 given for certain expansion errors for a long time, was not being given
4437 for the ${if def:h_colon_omitted{... case.
4439 PH/34 The spec says: "With one important exception, whenever a domain list is
4440 being scanned, $domain contains the subject domain." There was at least
4441 one case where this was not true.
4443 PH/35 The error "getsockname() failed: connection reset by peer" was being
4444 written to the panic log as well as the main log, but it isn't really
4445 panic-worthy as it just means the connection died rather early on. I have
4446 removed the panic log writing for the ECONNRESET error when getsockname()
4449 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4450 runs only) independently of the message's sender address. This meant
4451 that, if the 4xx error was in fact related to the sender, a different
4452 message to the same recipient with a different sender could confuse
4453 things. In particular, this can happen when sending to a greylisting
4454 server, but other circumstances could also provoke similar problems.
4455 I have changed the default so that the retry time for these errors is now
4456 based a combination of the sender and recipient addresses. This change
4457 can be overridden by setting address_retry_include_sender=false in the
4460 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4461 remote server are returned as part of bounce messages. This was not
4462 happening for LMTP over a pipe (the lmtp transport), but now it is the
4463 same for both kinds of LMTP.
4465 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4466 in header lines that were in fact CNAMEs. This is no longer the case.
4468 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4469 and queue runs started by the daemon processed all messages. This has
4470 been fixed so that -R and -S can now usefully be given with -q<time>.
4472 PH/40 Import PCRE release 6.7 (fixes some bugs).
4474 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4476 PH/42 Give an error if -q is specified more than once.
4478 PH/43 Renamed the variables $interface_address and $interface_port as
4479 $received_ip_address and $received_port, to make it clear that these
4480 values apply to message reception, and not to the outgoing interface when
4481 a message is delivered. (The old names remain recognized, of course.)
4483 PH/44 There was no timeout on the connect() call when using a Unix domain
4484 socket in the ${readsocket expansion. There now is.
4486 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4487 be meaningful with "accept".
4489 SC/01 Eximstats V1.43
4490 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4492 SC/02 Eximstats V1.44
4493 Use a glob alias rather than an array ref in the generated
4494 parser. This improves both readability and performance.
4496 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4497 Collect SpamAssassin and rejection statistics.
4498 Don't display local sender or destination tables unless
4499 there is data to show.
4500 Added average volumes into the top table text output.
4502 SC/04 Eximstats V1.46
4503 Collect data on the number of addresses (recipients)
4504 as well as the number of messages.
4506 SC/05 Eximstats V1.47
4507 Added 'Message too big' to the list of mail rejection
4508 reasons (thanks to Marco Gaiarin).
4510 SC/06 Eximstats V1.48
4511 Mainlog lines which have GMT offsets and are too short to
4512 have a flag are now skipped.
4514 SC/07 Eximstats V1.49 (Alain Williams)
4515 Added the -emptyok flag.
4517 SC/08 Eximstats V1.50
4518 Fixes for obtaining the IP address from reject messages.
4520 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4521 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4522 whitespace changes from 4.64-PH/27
4524 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4527 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4528 are found, allow negative numbers in numeric criteria)
4530 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4532 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4533 to match changes made in 4.64-PH/43
4535 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4537 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4538 "domain" is actually an IP address, and force a failure. This locks out
4539 those revolvers/nameservers that support "A-for-A" lookups, in
4540 contravention of the specifications.
4542 PH/48 When a host name was looked up from an IP address, and the subsequent
4543 forward lookup of the name timed out, the host name was left in
4544 $sender_host_name, contrary to the specification.
4546 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4547 restricted to single-key lookups, Exim was not diagnosing an error if
4548 * or *@ was used with a query-style lookup.
4550 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4552 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4553 long ago, but noone interested enough thought of it. Let's just say that
4554 the "1.1" means that there are some new functions that weren't there at
4555 some point in the past.
4557 PH/51 Error processing for expansion failure of helo_data from an smtp
4558 transport during callout processing was broken.
4560 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4561 tested/used via the -bh/-bhc/-bs options.
4563 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4564 bug, fixed in subsequent PCRE releases).
4566 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4567 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4569 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4575 SC/01 Use a glob alias rather than an array ref in eximstats generated
4576 parser. This improves both readability and performance.
4578 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4579 Don't display local sender or destination tables in eximstats unless
4580 there is data to show.
4581 Added average volumes into the eximstats top table text output.
4583 SC/03 Collect data on the number of addresses (recipients) as well
4584 as the number of messages in eximstats.
4586 TF/01 Correct an error in the documentation for the redirect router. Exim
4587 does (usually) call initgroups() when daemonizing.
4589 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4590 with consistent privilege compared to when running as a daemon.
4592 TF/03 Note in the spec that $authenticated_id is not set for local
4593 submissions from trusted users.
4595 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4596 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4598 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4599 by adding some example configuration directives to the default
4600 configuration file. A little bit of work is required to uncomment the
4601 directives and define how usernames and passwords are checked, but
4602 there is now a framework to start from.
4604 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4605 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4606 without this. I don't know how relevant this is to other LDAP libraries.
4608 PH/02 Add the verb name to the "unknown ACL verb" error.
4610 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4612 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4614 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4615 directory not expanded when it should be if an expanded home directory
4616 was set for the address (which is overridden by the transport).
4618 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4621 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4622 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4623 because it is too late at that time, and has no effect.
4625 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4626 security issue with \' (bugzilla #107). I could not use the
4627 PQescapeStringConn() function, because it needs a PGconn value as one of
4630 PH/08 When testing addresses using -bt, indicate those final addresses that
4631 are duplicates that would not cause an additional delivery. At least one
4632 person was confused, thinking that -bt output corresponded to deliveries.
4633 (Suppressing duplicates isn't a good idea as you lose the information
4634 about possibly different redirections that led to the duplicates.)
4636 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4637 systems where poll() doesn't work, in particular OS X.
4639 PH/10 Added more information to debugging output for retry time not reached.
4641 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4642 operations in malware.c.
4644 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4647 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4648 syslog_duplication set false, log lines that would normally be written
4649 both the the main log and to the reject log were not written to syslog at
4652 PH/14 In the default configuration, change the use of "message" in ACL warn
4653 statements to "add_header".
4655 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4656 not followed by a command (e.g. "seen endif").
4658 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4659 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4662 PH/17 Added extra conditions to the default value of delay_warning_condition
4666 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4667 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4668 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4671 The Auto-Submitted: and various List- headers are standardised, whereas I
4672 don't think Precedence: ever was.
4674 PH/18 Refactored debugging code in route_finduser() to show more information,
4675 in particular, the error code if getpwnam() issues one.
4677 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4678 This is apparently needed in addition to the PH/07 change above to avoid
4679 any possible encoding problems.
4681 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4682 but not after initializing Perl.
4684 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4685 output them only if debugging. By default they are written stderr,
4686 apparently, which is not desirable.
4688 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4691 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4694 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4696 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4697 authenticated or an ident call has been made. Suppress the default
4698 values for $authenticated_id and $authenticated_sender (but permit -oMai
4699 and -oMas) when testing with -bh.
4701 PH/24 Re-jigged the order of the tests in the default configuration so that the
4702 tests for valid domains and recipients precede the DNS black list and CSA
4703 tests, on the grounds that those ones are more expensive.
4705 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4706 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4707 This bug exists in every version of Exim that I still have, right back to
4710 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4711 However, an attempt to turn on case-sensitivity in a regex key by
4712 including (?-i) didn't work because the subject string was already
4713 lowercased, and the effects were non-intuitive. It turns out that a
4714 one-line patch can be used to allow (?-i) to work as expected.
4720 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4721 other effects) broke the use of negated acl sub-conditions.
4723 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4726 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4727 "Deny" causes Exim to reject the incoming connection with a 554 error.
4728 Unfortunately, if there is a major crisis, such as a disk failure,
4729 tcp-wrappers gives "deny", whereas what one would like would be some
4730 kind of temporary error. A kludge has been added to help with this.
4731 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4732 554 error is used if errno is still zero or contains ENOENT (which occurs
4733 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4736 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4738 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4739 errors. Otherwise a message that provokes a temporary error (when other
4740 messages do not) can cause a whole host to time out.
4742 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4743 addresses were routed directly to files or pipes from a redirect router.
4744 File deliveries just didn't batch; pipe deliveries might have suffered
4747 PH/06 A failure to get a lock for a hints database would erroneously always say
4748 "Failed to get write lock", even when it was really a read lock.
4750 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4751 of 0600. This has been changed to use the value of the lockfile_mode
4752 option (which defaults to 0600).
4754 PH/08 Applied small patch from the Sieve maintainer.
4756 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4757 folder from quota calculations, a direct delivery into this folder messed
4758 up the contents of the maildirsize file. This was because the regex was
4759 used only to exclude .Trash (or whatever) when the size of the mailbox
4760 was calculated. There was no check that a delivery was happening into an
4761 excluded directory. This bug has been fixed by ignoring all quota
4762 processing for deliveries into excluded directories.
4764 PH/10 Added the maildirfolder_create_regex option to appendfile.
4770 PH/01 The code for finding all the local interface addresses on a FreeBSD
4771 system running IPv6 was broken. This may well have applied to all BSD
4772 systems, as well as to others that have similar system calls. The broken
4773 code found IPv4 interfaces correctly, but gave incorrect values for the
4774 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4775 that it would not match correctly against @[] and not recognize the IPv6
4778 PH/02 The ipliteral router was not recognizing addresses of the form user@
4779 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4781 PH/03 Added disable_ipv6.
4783 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4784 decoded form, because it is most often used to construct To: headers
4785 lines in autoreplies, and the decoded form may well be syntactically
4786 invalid. However, $reply_address has leading white space removed, and all
4787 newlines turned into spaces so that the autoreply transport does not
4790 PH/05 If group was specified without a user on a router, and no group or user
4791 was specified on a transport, the group from the router was ignored.
4793 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4794 for visible compile-time settings that can be used to change these
4795 numbers, for those that want even more. Backwards compatibility with old
4796 spool files has been maintained. However, going back to a previous Exim
4797 release will lost any variables that are in spool files.
4799 PH/07 Two small changes when running in the test harness: increase delay when
4800 passing a TCP/IP connection to a new process, in case the original
4801 process has to generate a bounce, and remove special handling of
4802 127.0.0.2 (sic), which is no longer necessary.
4804 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4805 be the same on different OS.
4807 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4810 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4811 whether --show-vars was specified or not
4813 JJ/02 exipick: Added support for new ACL variable spool format introduced
4816 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4817 syntactically invalid From: or Reply-to: line, and a filter used this to
4818 generate an autoreply, and therefore failed to obtain an address for the
4819 autoreply, Exim could try to deliver to a non-existent relative file
4820 name, causing unrelated and misleading errors. What now happens is that
4821 it logs this as a hard delivery error, but does not attempt to create a
4824 PH/11 The exinext utility has a -C option for testing purposes, but although
4825 the given file was scanned by exinext itself; it wasn't being passed on
4826 when Exim was called.
4828 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4829 an end-of-file indication when reading a command response.
4831 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4832 compiled. In many other places in Exim, IPv6 addresses are always
4833 recognized, so I have changed this. It also means that IPv4 domain
4834 literals of the form [IPV4:n.n.n.n] are now always recognized.
4836 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4837 used if the router is not running as root, for example, when verifying at
4838 ACL time, or when using -bh. The debugging output from this situation was
4839 non-existent - all you got was a failure to exec. I have made two
4842 (a) Failures to set uid/gid, the current directory, or a process leader
4843 in a subprocess such as that created by queryprogram now generate
4844 suitable debugging output when -d is set.
4846 (b) The queryprogram router detects when it is not running as root,
4847 outputs suitable debugging information if -d is set, and then runs
4848 the subprocess without attempting to change uid/gid.
4850 PH/15 Minor change to Makefile for building test_host (undocumented testing
4853 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4854 additional section of a DNS packet that returns MX or SRV records.
4855 Instead, it always explicitly searches for A/AAAA records. This avoids
4856 major problems that occur when a DNS server includes only records of one
4857 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4858 fixed another bug: if SRV records were looked up and the corresponding
4859 address records were *not* found in the additional section, the port
4860 values from the SRV records were lost.
4862 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4863 using the correct key (the original address) when searching the retry
4864 rules in order to find which one to use for generating the retry hint.
4866 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4867 adding the default one. Similarly, if it contains a Reply-To: header, the
4868 errors_reply_to option, if set, is not used.
4870 PH/19 When calculating a retry time, Exim used to measure the "time since
4871 failure" by looking at the "first failed" field in the retry record. Now
4872 it does not use this if it is later than than the arrival time of the
4873 message. Instead it uses the arrival time. This makes for better
4874 behaviour in cases where some deliveries succeed, thus re-setting the
4875 "first failed" field. An example is a quota failure for a huge message
4876 when small messages continue to be delivered. Without this change, the
4877 "time since failure" will always be short, possible causing more frequent
4878 delivery attempts for the huge message than are intended.
4879 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4881 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4882 $1, $2, $3) because the numerical variables can be reset during some
4883 expansion items (e.g. "match"), thereby losing the authentication data.
4885 PH/21 Make -bV show the size of off_t variables so that the test suite can
4886 decide whether to run tests for quotas > 2G.
4888 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4889 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4890 filecount value is greater than 2G or if a quota value is greater than 2G
4891 on a system where the size of off_t is not greater than 4, a panic error
4894 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4895 never match. The debug and -bh output now contains an explicit error
4896 message indicating a malformed IPv4 address or mask.
4898 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4899 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4900 PH/23 above applies.
4902 PH/25 Do not write to syslog when running in the test harness. The only
4903 occasion when this arises is a failure to open the main or panic logs
4904 (for which there is an explicit test).
4906 PH/26 Added the /no_tell option to "control=freeze".
4908 PH/27 If a host name lookup failed very early in a connection, for example, if
4909 the IP address matched host_lookup and the reverse lookup yielded a name
4910 that did not have a forward lookup, an error message of the form "no IP
4911 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4912 could be logged. Now it outputs the IP address instead of "NULL".
4914 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4915 allows the sender and the authenticated sender to be set when
4916 submitting a message from within Exim. Since child_open_exim() is
4917 documented for local_scan(), the new function should be too.
4919 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4920 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4921 results in an empty string is now treated as unset.
4923 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4925 PH/31 Added sender_verify_fail logging option.
4927 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4928 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4929 tidied the source and removed it altogether.
4931 PH/33 When a queue run was abandoned because the load average was too high, a
4932 log line was always written; now it is written only if the queue_run log
4933 selector is set. In addition, the log line for abandonment now contains
4934 information about the queue run such as the pid. This is always present
4935 in "start" and "stop" lines but was omitted from the "abandon" line.
4937 PH/34 Omit spaces between a header name and the colon in the error message that
4938 is given when verify = headers_syntax fails (if there are lots of them,
4939 the message gets confusing).
4941 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4942 names, as there are now some PTR records that contain slashes. This check
4943 is only to protect against broken name servers that fall over on strange
4944 characters, so the fact that it applies to all lookups doesn't matter.
4946 PH/36 Now that the new test suite is complete, we can remove some of the
4947 special code in Exim that was needed for the old test suite. For example,
4948 sorting DNS records because real resolvers return them in an arbitrary
4949 order. The new test suite's fake resolver always returns records in the
4952 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4953 bounces) except when queue_only is set, to avoid logging races between
4954 the different processes.
4956 PH/38 Panic-die if .include specifies a non-absolute path.
4958 PH/39 A tweak to the "H" retry rule from its user.
4960 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4961 a label. They prevented compilation on older perls.
4963 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4964 a warning to be raised on newish perls.
4966 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4967 on queue. Changes to match documented behaviour of showing count of
4968 messages matching specified criteria.
4970 PH/40 Changed the default ident timeout from 30s to 5s.
4972 PH/41 Added support for the use of login_cap features, on those BSD systems
4973 that have them, for controlling the resources used by pipe deliveries.
4975 PH/42 The content-scanning code uses fopen() to create files in which to put
4976 message data. Previously it was not paying any attention to the mode of
4977 the files. Exim runs with umask(0) because the rest of the code creates
4978 files with open(), and sets the required mode explicitly. Thus, these
4979 files were ending up world-writeable. This was not a big issue, because,
4980 being within the spool directory, they were not world-accessible. I have
4981 created a function called modefopen, which takes an additional mode
4982 argument. It sets umask(777), creates the file, chmods it to the required
4983 mode, then resets the umask. All the relevant calls to fopen() in the
4984 content scanning code have been changed to use this function.
4986 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4987 to 24 hours. This avoids potential overflow problems when processing G
4988 and H retry rules. I suspect nobody ever tinkers with this value.
4990 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4992 PH/45 When the plaintext authenticator is running as a client, the server's
4993 challenges are checked to ensure they are valid base64 strings. By
4994 default, the authentication attempt is cancelled if an invalid string is
4995 received. Setting client_ignore_invalid_base64 true ignores these errors.
4996 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4997 they are received. Thus, the responses can be made to depend on the
4998 challenges. If an invalid string is ignored, an empty string is placed in
5001 PH/46 Messages that are created by the autoreply transport now contains a
5002 References: header, in accordance with RFCs 2822 and 3834.
5004 PH/47 Added authenticated_sender_force to the smtp transport.
5006 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
5008 PH/49 Installed latest patch from the Sieve maintainer.
5010 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
5011 was also set, the appendfile transport was unnecessarily scanning a
5012 directory of message files (e.g. for maildir delivery) to find the count
5013 of files (along with the size), even though it did not need this
5014 information. It now does the scan only if it needs to find either the
5015 size of the count of files.
5017 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5019 PH/52 Two bugs concerned with error handling when the smtp transport is
5022 (i) Exim was not creating retry information for temporary errors given
5023 for individual recipients after the DATA command when the smtp transport
5024 was used in LMTP mode. This meant that they could be retried too
5025 frequently, and not timed out correctly.
5027 (ii) Exim was setting the flag that allows error details to be returned
5028 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5029 recipients that were returned after the DATA command.
5031 PH/53 This is related to PH/52, but is more general: for any failing address,
5032 when detailed error information was permitted to be returned to the
5033 sender, but the error was temporary, then after the final timeout, only
5034 "retry timeout exceeded" was returned. Now it returns the full error as
5035 well as "retry timeout exceeded".
5037 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5038 do this, and (what is worse) MTAs that accept it.
5040 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5041 will now be deprecated.
5043 PH/56 New os.c-cygwin from the Cygwin maintainer.
5045 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5046 formats (previously only available in exim formats via -bpr, -bpru,
5047 and -bpra. Now also available in native and exiqgrep formats)
5049 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5050 with very large, slow to parse queues
5052 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5054 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5056 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5057 responses to authentication challenges, though it was showing the
5058 challenges; (ii) I've removed the CR characters from the debug output for
5061 PH/58 Allow for the insertion of a newline as well as a space when a string
5062 is turned into more than one encoded-word during RFC 2047 encoding. The
5063 Sieve code now uses this.
5065 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5066 data_4xx, lost_connection, tls_required.
5068 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5069 message was being sent as an SMTP response.
5071 PH/61 Add -l and -k options to exicyclog.
5073 PH/62 When verifying, if an address was redirected to one new address, so that
5074 verification continued, and the new address failed or deferred after
5075 having set something in $address_data, the value of $address_data was not
5076 passed back to the ACL. This was different to the case when no
5077 redirection occurred. The value is now passed back in both cases.
5079 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5080 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5081 use login_cap.h, so on its own it isn't the distinguishing feature. The
5082 new name refers directly to the setclassresources() function.
5084 PH/65 Added configuration files for NetBSD3.
5086 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5088 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5089 is preferred over IPv4.
5091 PH/68 The bounce_return_message and bounce_return_body options were not being
5092 honoured for bounces generated during the reception of non-SMTP messages.
5093 In particular, this applied to messages rejected by the ACL. This bug has
5094 been fixed. However, if bounce_return_message is true and bounce_return_
5095 body is false, the headers that are returned for a non-SMTP message
5096 include only those that have been read before the error was detected.
5097 (In the case of an ACL rejection, they have all been read.)
5099 PH/69 The HTML version of the specification is now built in a directory called
5100 spec_html instead of spec.html, because the latter looks like a path with
5101 a MIME-type, and this confuses some software.
5103 PH/70 Catch two compiler warnings in sieve.c.
5105 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5106 function verify_get_ident() calls ip_connect() to connect a socket, but
5107 if the "connect()" function timed out, ip_connect() used to close the
5108 socket. However, verify_get_ident() also closes the socket later, and in
5109 between Exim writes to the log, which may get opened at this point. When
5110 the socket was closed in ip_connect(), the log could get the same file
5111 descriptor number as the socket. This naturally causes chaos. The fix is
5112 not to close the socket in ip_connect(); the socket should be closed by
5113 the function that creates it. There was only one place in the code where
5114 this was missing, in the iplookup router, which I don't think anybody now
5115 uses, but I've fixed it anyway.
5117 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5118 well as to direct DNS lookups. Otherwise the handling of names in host
5119 lists is inconsistent and therefore confusing.
5125 PH/01 Two changes to the default runtime configuration:
5127 (1) Move the checks for relay_from_hosts and authenticated clients from
5128 after to before the (commented out) DNS black list checks.
5130 (2) Add control=submission to the relay_from_hosts and authenticated
5131 clients checks, on the grounds that messages accepted by these
5132 statements are most likely to be submissions.
5134 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5136 (1) Generate an error if the third argument for the ${prvs expansion is
5139 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5142 (3) Reset the variables that are obtained from the first argument of
5143 ${prvscheck and used in the second argument before leaving the code,
5144 because their memory is reclaimed, so using them afterwards may do
5147 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5148 one (it's much easier than Tom thought :-).
5150 (5) Because of (4), we can now allow for the use of $prvscheck_result
5151 inside the third argument.
5153 PH/03 For some reason, the default setting of PATH when running a command from
5154 a pipe transport was just "/usr/bin". I have changed it to
5157 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5158 anything to be listed in the output from -bV.
5160 PH/05 When a filter generated an autoreply, the entire To: header line was
5161 quoted in the delivery log line, like this:
5163 => >A.N.Other <ano@some.domain> <original@ddress> ...
5165 This has been changed so that it extracts the operative address. There
5166 may be more than one such address. If so, they are comma-separated, like
5169 => >ano@some.domain,ona@other.domain <original@ddress> ...
5171 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5172 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5173 not being looked up in the rDNS to get a host name, Exim was showing the
5174 IP address twice in Received: lines, even though the IP addresses were
5175 identical. For example:
5177 Received: from [1.2.3.4] (helo=[1.2.3.4])
5179 However, if the real host name was known, it was omitting the HELO data
5180 if it matched the actual IP address. This has been tidied up so that it
5181 doesn't show the same IP address twice.
5183 PH/07 When both +timestamp and +memory debugging was on, the value given by
5184 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5185 called by the debug printing, thereby overwriting the timestamp buffer.
5186 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5188 PH/08 When the original message was included in an autoreply transport, it
5189 always said "this is a copy of the message, including all the headers",
5190 even if body_only or headers_only was set. It now gives an appropriate
5193 PH/09 Applied a patch from the Sieve maintainer which:
5195 o fixes some comments
5196 o adds the (disabled) notify extension core
5197 o adds some debug output for the result of if/elsif tests
5198 o points to the current vacation draft in the documentation
5199 and documents the missing references header update
5203 o fixes a bug in processing the envelope test (when testing
5204 multiple envelope elements, the last element determined the
5207 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5208 Electronic Mail") by including:
5210 Auto-submitted: auto-generated
5212 in the messages that it generates (bounce messages and others, such as
5213 warnings). In the case of bounce messages for non-SMTP messages, there was
5214 also a typo: it was using "Auto_submitted" (underscore instead of
5215 hyphen). Since every message generated by Exim is necessarily in response
5216 to another message, thes have all been changed to:
5218 Auto-Submitted: auto-replied
5220 in accordance with these statements in the RFC:
5222 The auto-replied keyword:
5224 - SHOULD be used on messages sent in direct response to another
5225 message by an automatic process,
5227 - MUST NOT be used on manually-generated messages,
5229 - MAY be used on Delivery Status Notifications (DSNs) and Message
5230 Disposition Notifications (MDNs),
5232 - MUST NOT be used on messages generated by automatic or periodic
5233 processes, except for messages which are automatic responses to
5236 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5237 to the default Received: header definition.
5239 PH/12 Added log selector acl_warn_skipped (default on).
5241 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5242 variables because (a) they are in the wrong storage pool and (b) even if
5243 they were copied, it wouldn't work properly because of the caching.
5245 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5246 checking when decoding. Apparently there are clients that generate
5247 overlong encoded strings. Why am I not surprised?
5249 PH/15 If the first argument of "${if match_address" was not empty, but did not
5250 contain an "@" character, Exim crashed. Now it writes a panic log message
5251 and treats the condition as false.
5253 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5255 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5256 extension "envelope-auth". The code is finished and in agreement with
5257 other implementations, but there is no documentation so far and in fact,
5258 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5259 not changing the active code.
5261 Print executed "if" and "elsif" statements when debugging is used. This
5262 helps a great deal to understand what a filter does.
5264 Document more things not specified clearly in RFC3028. I had all this
5265 sorted out, when out of a sudden new issues came to my mind. Oops."
5267 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5270 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5271 canonical form (as documented). However, after a host name lookup from
5272 the IP address, check_host() was doing a simple string comparison with
5273 addresses acquired from the DNS when checking that the found name did
5274 have the original IP as one of its addresses. Since any found IPv6
5275 addresses are likely to be in abbreviated form, the comparison could
5276 fail. Luckily, there already exists a function for doing the comparison
5277 by converting both addresses to binary, so now that is used instead of
5278 the text comparison.
5280 PH/20 There was another similar case to PH/19, when a complete host name was
5281 given in a host list; looking up its IP address could give an abbreviated
5282 form, whereas the current host's name might or might not be abbreviated.
5283 The same fix has been applied.
5289 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5290 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5293 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5294 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5296 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5298 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5299 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5300 Also, for "Auto-Submitted", treat anything other than "no" as
5301 non-personal, in accordance with RFC 3834. (Previously it treated
5302 anything starting "auto-" as non-personal.)
5304 TF/01 The control=submission/name=... option had a problem with syntax
5305 errors if the name included a slash character. The /name= option
5306 now slurps the rest of the string, so it can include any characters
5307 but it must come last in the list of options (after /sender_retain
5310 PH/05 Some modifications to the interface to the fake nameserver for the new
5318 TK/01 Added the "success_on_redirect" address verification option. See
5319 NewStuff for rationale and an example.
5321 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5323 PH/02 Patch to exigrep to allow it to work on syslog lines.
5325 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5326 fread() to skip over the body file's header line, because in Cygwin the
5327 header line is locked and is inaccessible.
5329 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5330 co-exist for some time) to make it clear that it is the Exim ID that is
5331 referenced, not the Message-ID: header line.
5333 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5334 string_format() function, because snprintf() does not exist on all
5337 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5338 ${stat: expansion item.
5340 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5341 protocol synchronization error", to keep the pedants happy.
5343 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5344 well as for IRIX systems, when gcc is being used. See the host.c source
5347 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5349 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5352 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5353 transport and to the smtp transport in LMTP mode.
5355 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5357 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5358 run a filter in a subprocess. This could lead to confusion in subsequent
5359 lookups in the parent process. There should also be a search_tidyup() at
5360 the end of the subprocess.
5362 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5363 only if the host matched helo_try_verify_hosts, which caused the
5364 verification to occur when the EHLO/HELO command was issued. The ACL just
5365 tested the remembered result. Now, if a previous verification attempt has
5366 not happened, "verify = helo" does it there and then.
5368 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5370 TK/03 Fix log output including CR from clamd.
5372 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5373 exist provoked a memory error which could cause a segfault.
5375 PH/15 Installed PCRE 6.2
5377 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5379 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5380 of the problem. Specifically, suggested +O2 rather than +O1 for the
5383 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5385 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5386 record, the port was not correctly logged when the outgoing_port log
5387 selector was set (it logged the transort's default port).
5389 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5390 fallback_hosts, and "hosts" in the smtp transport.
5392 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5393 host errors such as "Connection refused".
5395 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5396 authentication with radiusclient 0.4.9:
5398 - Error returned from rc_read_config was caught wrongly
5399 - Username/password not passed on to radius server due to wrong length.
5401 The presumption is that some radiusclient API changes for 4.51/PH/17
5402 were not taken care of correctly. The code is still untested by me (my
5403 Linux distribution still has 0.3.2 of radiusclient), but it was
5404 contributed by a Radius user.
5406 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5407 expanding the "port" option of the smtp transport.
5409 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5410 while reading a MIME header. Thanks to Tom Hughes for a patch.
5412 PH/24 Include config.h inside local_scan.h so that configuration settings are
5415 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5416 that in an ACL for RCPT (for example), you can examine exactly what was
5419 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5420 commands, but it was not correctly comparing the address with the actual
5421 client host address. Thus, it would show the EHLO address in Received:
5422 header lines when this was not necessary.
5424 PH/27 Added the % operator to ${eval:}.
5426 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5427 it should be ignoring failures (because with -C, for example, it has lost
5428 privilege). It wasn't ignoring creation failures other than "already
5431 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5434 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5435 because an input line was too long, either on its own, or by virtue of
5436 too many continuations, the temporary file was not being removed, and the
5437 return code was incorrect.
5439 PH/31 Missing "BOOL" in function definition in filtertest.c.
5441 PH/32 Applied Sieve patches from the maintainer.
5443 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5445 PH/33 Added "verify = not_blind".
5447 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5448 Local/Makefile (with some defaults set). These are used in built scripts
5449 such as exicyclog, but they have never been used in the exim_install
5450 script (though there are many overriding facilities there). I have
5451 arranged that the exim_install script now takes note of these two
5454 PH/35 Installed configuration files for Dragonfly.
5456 PH/36 When a locally submitted message by a trusted user did not contain a
5457 From: header, and the sender address was obtained from -f or from an SMTP
5458 MAIL command, and the trusted user did not use -F to supply a sender
5459 name, $originator_name was incorrectly used when constructing a From:
5460 header. Furthermore, $originator_name was used for submission mode
5461 messages from external hosts without From: headers in a similar way,
5462 which is clearly wrong.
5464 PH/37 Added control=suppress_local_fixups.
5466 PH/38 When log_selector = +received_sender was set, and the addition of the
5467 sender made the log line's construction buffer exactly full, or one byte
5468 less than full, an overflow happened when the terminating "\n" was
5471 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5472 when the result of a list match is failure because a DNS lookup failed.
5474 PH/40 RM_COMMAND is now used in the building process.
5476 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5477 the "build-* directories that it finds.
5479 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5480 address in a domain literal was a prefix of an interface address.
5482 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5483 when verifying a sender address, unless rewrite_headers is false.
5485 PH/44 Wrote a long comment about why errors_to addresses are verified as
5486 recipients, not senders.
5488 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5489 the ratelimit ACL was added.
5491 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5493 PH/46 Added extra information about PostgreSQL errors to the error string.
5495 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5496 avoiding the need to install special zones in a real server. This is
5497 backwards compatible; if it can't find the fake resolver, it drops back.
5498 Thus, both old and new test suites can be run.
5500 TF/02 Added util/ratelimit.pl
5502 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5503 clock is set back in time.
5505 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5506 Candler <B.Candler@pobox.com>.
5508 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5509 OK for addresses that are the result of redirections.
5511 PH/48 A number of further additions for the benefit of the new test suite,
5512 including a fake gethostbyname() that interfaces to the fake DNS resolver
5515 TF/06 The fix for widen_domains has also been applied to qualify_single and
5516 search_parents which are the other dnslookup options that can cause
5519 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5522 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5524 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5525 service" if it encountered an MX record with an empty target hostname.
5526 The message is now "an MX or SRV record indicated no SMTP service".
5528 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5529 if the DNS of the sending site is misconfigured. This is quite a
5530 common situation. This change restores the behaviour of treating a
5531 helo verification defer as a failure.
5533 PH/51 If self=fail was set on a router, the bounce message did not include the
5534 actual error message.
5540 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5542 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5543 command itself ended in error, the underlying message about the transport
5544 filter timeout was being overwritten with the pipe command error. Now the
5545 underlying error message should be appended to the second error message.
5547 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5549 PH/02 Reduce the amount of output that "make" produces by default. Full output
5550 can still be requested.
5552 PH/03 The warning log line about a condition test deferring for a "warn" verb
5553 was being output only once per connection, rather than after each
5554 occurrence (because it was using the same function as for successful
5555 "warn" verbs). This seems wrong, so I have changed it.
5557 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5558 it should not have, which might have caused a crash in the right
5559 circumstances, but probably never did.
5561 PH/04 Installed a modified version of Tony Finch's patch to make submission
5562 mode fix the return path as well as the Sender: header line, and to
5563 add a /name= option so that you can make the user's friendly name appear
5566 TF/03 Added the control = fakedefer ACL modifier.
5568 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5569 Mark Lowes for thorough testing.
5571 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5573 TK/03 Merged latest SRS patch from Miles Wilton.
5575 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5576 with the definition in sysexits.h (which is #included earlier).
5577 Fortunately, Exim does not actually use EX_OK. The code used to try to
5578 preserve the sysexits.h value, by assuming that macro definitions were
5579 scanned for macro replacements. I have been disabused of this notion,
5580 so now the code just undefines EX_OK before #including unistd.h.
5582 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5583 in the smtp transport. When a block could not be written in a single
5584 write() function, the timeout was being re-applied to each part-write.
5585 This seems wrong - if the receiver was accepting one byte at a time it
5586 would take for ever. The timeout is now adjusted when this happens. It
5587 doesn't have to be particularly precise.
5589 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5590 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5592 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5593 without a domain if the check to <postmaster@domain> fails.
5595 SC/01 Eximstats: added -xls and the ability to specify output files
5596 (patch written by Frank Heydlauf).
5598 SC/02 Eximstats: use FileHandles for outputting results.
5600 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5602 SC/04 Eximstats: fixed display of large numbers with -nvr option
5604 SC/05 Eximstats: fixed merging of reports with empty tables.
5606 SC/06 Eximstats: added the -include_original_destination flag
5608 SC/07 Eximstats: removed tabs and trailing whitespace.
5610 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5612 TK/06 MBOX spool code: Add real "From " MBOX separator line
5613 so the .eml file is really in mbox format (even though
5614 most programs do not really care). Patch from Alex Miller.
5616 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5617 The latter is generated from $received_to and is only set if the
5618 message has one envelope recipient. SA can use these headers,
5619 obviously out-of-the-box. Patch from Alex Miller.
5621 PH/08 The ${def test on a variable was returning false if the variable's
5622 value was "0", contrary to what the specification has always said!
5623 The result should be true unless the variable is empty.
5625 PH/09 The syntax error of a character other than { following "${if
5626 def:variable_name" (after optional whitespace) was not being diagnosed.
5627 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5628 accidental colon was present, for example, could give incorrect results.
5630 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5631 result is used (not including appendfile, where other changes are about
5634 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5635 This involved changing a lot of size variables from int to off_t. It
5636 should work with maildirs and everything.
5638 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5639 spamd dying while we are connected to it.
5641 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5644 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5645 function for BDB 4.3.
5647 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5649 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5650 the sources for PCRE have been re-arranged and more files are now
5653 PH/15 The code I had for printing potentially long long variables in PH/11
5654 above was not the best (it lost precision). The length of off_t variables
5655 is now inspected at build time, and an appropriate printing format (%ld
5656 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5657 to be "long long int" or "long int". This is needed for the internal
5658 formatting function string_vformat().
5660 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5661 the configuration file to be ":syslog", then the script "guesses" where
5662 the logs files are, rather than using the compiled in default. In our
5663 case the guess is not the same as the compiled default, so the script
5664 suddenly stopped working when I started to use syslog. The patch checks
5665 to see if log_file_path is "". If so, it attempts to read it from exim
5666 with no configuration file to get the compiled in version, before it
5667 falls back to the previous guessing code."
5669 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5670 implementing BATV in an Exim configuration. See NewStuff for the gory
5673 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5674 Makefile that are specific to HP-UX.
5676 PH/18 If the "use_postmaster" option was set for a recipient callout together
5677 with the "random" option, the postmaster address was used as the MAIL
5678 FROM address for the random test, but not for the subsequent recipient
5679 test. It is now used for both.
5681 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5682 patch removes a few documentation additions to RFC 3028, because the
5683 latest draft now contains them. It adds the new en;ascii-case comparator
5684 and a new error check for 8bit text in MIME parts. Comparator and
5685 require names are now matched exactly. I enabled the subaddress
5686 extension, but it is not well tested yet (read: it works for me)."
5688 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5689 rework some of the code of TK/09 above to avoid the hardwired use of
5690 "%lld" and "long long". Replaced the call to snprintf() with a call to
5693 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5694 records point to non-existent hosts", "retry timeout exceeded", and
5695 "retry time not reached for any host after a long failure period".
5697 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5698 experimental DomainKeys support:
5700 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5701 (2) On an error such as an illegally used "control", the wrong name for
5702 the control was given.
5704 These problems did NOT occur unless DomainKeys support was compiled.
5706 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5708 PH/24 Added ${if match_ip condition.
5710 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5711 databases so that it will be absolutely obvious if a crash occurs in the
5712 DB library. This is a regular occurrence (often caused by mis-matched
5715 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5716 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5717 picked up on a user's system that detects such things. There doesn't seem
5718 to be a gcc warning option for this - only an attribute that has to be
5719 put on the function's prototype. It seems that in Fedora Core 4 they have
5720 set this on a number of new functions. No doubt there will be more in due
5723 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5724 specify a transport. However, if an address that was verified by such a
5725 router was the subject of a callout, Exim crashed because it tried to
5726 read the rcpt_include_affixes from the non-existent transport. Now it
5727 just assumes that the setting of that option is false. This bug was
5728 introduced by 4.51/PH/31.
5730 PH/28 Changed -d+all to exclude +memory, because that information is very
5731 rarely of interest, but it makes the output a lot bigger. People tend to
5732 do -d+all out of habit.
5734 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5735 code in os-type was giving problems when libc.so lives in lib64, like on
5738 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5739 aren't the modern standard, and it seems that some systems' include files
5740 don't always have them. Exim was already checking for some of the newer
5741 ones like T_AAAA, and defining it itself. I've added checks for all the
5742 record types that Exim uses.
5744 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5745 not automatically generating a new one, as it is supposed to. This
5746 prevented TLS from working. If the file did exist, but contained invalid
5747 data, a new version was generated, as expected. It was only the case of a
5748 non-existent file that was broken.
5750 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5751 with a change in libdomainkeys > 0.64.
5753 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5754 from DNS. If the selector record carries the flag, it now has
5755 precedence over the domain-wide flag.
5757 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5759 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5760 the use of a port name that isn't defined in /etc/services) occurred, the
5761 message was deferred as in a normal delivery, and thus remained on the
5762 spool, instead of being failed because of the mua_wrapper setting. This
5763 is now fixed, and I tidied up some of the mua_wrapper messages at the
5766 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5767 the messages in a hash of arrays rather than using individual hashes.
5768 This is a bit cleaner and results in dramatic memory savings, albeit
5769 at a slight CPU cost.
5771 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5772 as requested by Marc Sherman.
5774 SC/10 Eximstats: added histograms for user specified patterns as requested
5777 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5779 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5780 fopen() in the content-scanning modules that did not already have it.
5786 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5787 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5789 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5791 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5793 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5794 to test Sieve filters that use "vacation".
5796 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5797 that changes the way the GnuTLS parameters are stored in the cache file.
5798 The new format can be generated externally. For backward compatibility,
5799 if the data in the cache doesn't make sense, Exim assumes it has read an
5800 old-format file, and it generates new data and writes a new file. This
5801 means that you can't go back to an older release without removing the
5804 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5805 work if there are any delivery delays because "one_time" forces the
5806 parent to be marked "delivered", so its unseen clone is never tried
5807 again. For this reason, Exim now forbids the simultaneous setting of
5810 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5811 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5812 entry if you want to know the details. The fix, however, neglected to
5813 consider the case when local delivery batching is involved. The test for
5814 "previously delivered" was not happening when checking to see if an
5815 address could be batched with a previous (undelivered) one; under
5816 certain circumstances this could lead to multiple deliveries to the same
5819 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5820 in its include files, and this causes problems building Exim.
5822 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5823 header_syntax) but Exim was just ignoring anything given after a slash.
5824 In particular, this caused confusion with an attempt to use "verify =
5825 reverse_host_lookup/defer_ok". An error is now given when options are
5826 supplied for verify items that do not have them. (Maybe reverse_host_
5827 lookup should have a defer_ok option, but that's a different point.)
5829 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5830 defined by RFC 821) to 2048, because there were problems with some AUTH
5831 commands, and RFC 1869 says the size should be increased for extended
5832 SMTP commands that take arguments.
5834 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5837 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5838 "unknown" error; now it says that the functionality isn't in the binary.
5840 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5841 an address' error message when a string expansion fails (syntax or
5842 whatever). Otherwise the password may appear in the log. Following change
5843 PH/42 below, there is no longer a chance of it appearing in a bounce
5846 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5848 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5849 of its addresses was ever tried. (Bugzilla bug #2.)
5851 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5852 the result incorrectly in the debug output. (It correctly added a newline
5853 to what was transported.)
5855 TF/01 Added $received_time.
5857 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5858 commented out examples of how to interface to a virus scanner and to
5859 SpamAssassin. Also added commented examples of av_scanner and
5860 spamd_address settings.
5862 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5863 and controls are allowed in which ACLs. There were a couple of minor
5864 errors. Some of the entries in the conditions table (which is a table of
5865 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5866 negation of where the condition IS allowed.
5868 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5870 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5871 header file does not have a version number, so I've had to invent a new
5872 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5873 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5874 radiusclient), but it was contributed by a Radius user.
5876 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5877 files or directories, for OpenSSL.
5879 PH/19 When an Exim process that is running as root has to create an Exim log
5880 file, it does so in a subprocess that runs as exim:exim so as to get the
5881 ownership right at creation (otherwise, other Exim processes might see
5882 the file with the wrong ownership). There was no test for failure of this
5883 fork() call, which would lead to the process getting stuck as it waited
5884 for a non-existent subprocess. Forks do occasionally fail when resources
5885 run out. I reviewed all the other calls to fork(); they all seem to check
5888 PH/20 When checking for unexpected SMTP input at connect time (before writing
5889 the banner), Exim was not dealing correctly with a non-positive return
5890 from the read() function. If the client had disconnected by this time,
5891 the result was a log entry for a synchronization error with an empty
5892 string after "input=" when read() returned zero. If read() returned -1
5893 (an event I could not check), uninitialized data bytes were printed.
5894 There were reports of junk text (parts of files, etc) appearing after
5897 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5899 PH/22 Added support for macro redefinition, and (re)definition in between
5900 driver and ACL definitions.
5902 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5903 forgetting to use the resulting value; it was using the unexpanded value.
5905 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5906 hadn't been configured. The fix is from Juergen Kreileder, who
5907 understands it better than I do:
5909 "Here's what I see happening with three configured cyrus_sasl
5910 authenticators configured (plain, login, cram-md5):
5912 On startup auth_cyrus_sasl_init() gets called for each of these.
5913 This means three calls to sasl_listmech() without a specified mech_list.
5914 => SASL tests which mechs of all available mechs actually work
5915 => three warnings about OTP not working
5916 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5918 With the patch, sasl_listmech() also gets called three times. But now
5919 SASL's mech_list option is set to the server_mech specified in the the
5920 authenticator. Or in other words, the answer from sasl_listmech()
5921 gets limited to just the mech you're testing for (which is different
5923 => the return list contains just 'plain' or 'login', 'cram-md5' or
5924 nothing depending on the value of ob->server_mech.
5926 I've just tested the patch: Authentication still works fine,
5927 unavailable mechs specified in the exim configuration are still
5928 caught, and the auth.log warnings about OTP are gone."
5930 PH/25 When debugging is enabled, the contents of the command line are added
5931 to the debugging output, even when log_selector=+arguments is not
5934 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5935 answer is "GNU", and only if the return is "GNU/something" is the answer
5938 PH/27 $acl_verify_message is now set immediately after the failure of a
5939 verification in an ACL, and so is available in subsequent modifiers. In
5940 particular, the message can be preserved by coding like this:
5942 warn !verify = sender
5943 set acl_m0 = $acl_verify_message
5945 Previously, $acl_verify_message was set only while expanding "message"
5946 and "log_message" when a very denied access.
5948 PH/28 Modified OS/os.c-Linux with
5950 -#ifndef OS_LOAD_AVERAGE
5951 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5953 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5954 nomenclature these days.)
5956 PH/29 Installed patch from the Sieve maintainer that adds the options
5957 sieve_useraddress and sieve_subaddress to the redirect router.
5959 PH/30 In these circumstances:
5960 . Two addresses routed to the same list of hosts;
5961 . First host does not offer TLS;
5962 . First host accepts first address;
5963 . First host gives temporary error to second address;
5964 . Second host offers TLS and a TLS session is established;
5965 . Second host accepts second address.
5966 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5967 and peerdn, if requested) that were in fact used only for the second
5970 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5971 attention to any local part prefix or suffix that was matched by the
5972 router that accepted the address. It now behaves in the same way as it
5973 does for delivery: the affixes are removed from the local part unless
5974 rcpt_include_affixes is set on the transport.
5976 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5977 timeout during the DATA phase of an incoming message.
5979 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5980 applied a patch sanctioned by the Sieve maintainer.
5982 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5983 the uid or gid is negative. A case of a negative gid caused this to be
5984 noticed. The fix allows for either to be negative.
5986 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5987 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5990 PH/36 The change PH/12 above was broken. Fixed it.
5992 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5993 the grounds that routing the same address twice would always produce the
5994 same answer. This might have been true once, but it is certainly no
5995 longer true now. Routing a child address may depend on the previous
5996 routing that produced that child. Some complicated redirection strategies
5997 went wrong when messages had multiple recipients, and made Exim's
5998 behaviour dependent on the order in which the addresses were given.
6000 I have moved the duplicate checking until after the routing is complete.
6001 Exim scans the addresses that are assigned to local and remote
6002 transports, and removes any duplicates. This means that more work will be
6003 done, as duplicates will always all be routed, but duplicates are
6004 presumably rare, so I don't expect this is of any significance.
6006 For deliveries to pipes, files, and autoreplies, the duplicate checking
6007 still happens during the routing process, since they are not going to be
6010 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
6011 It corrects a timeout issue with spamd. This is Ian's comment: "The
6012 background is that sometimes spamd either never reads data from a
6013 connection it has accepted, or it never writes response data. The exiscan
6014 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
6015 blindly assumes that writes won't block so it may never time out."
6017 PH/39 Allow G after quota size as well as K and M.
6019 PH/40 The value set for $authenticated_id in an authenticator may not contain
6020 binary zeroes or newlines because the value is written to log lines and
6021 to spool files. There was no check on this. Now the value is run through
6022 the string_printing() function so that such characters are converted to
6023 printable escape sequences.
6025 PH/41 $message_linecount is a new variable that contains the total number of
6026 lines in the message. Compare $body_linecount, which is the count for the
6029 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6030 bounce and delay warning messages, except in certain special cases, which
6033 (a) An SMTP error message from a remote host;
6034 (b) A message specified in a :fail: redirection;
6035 (c) A message specified in a "fail" command in a system filter;
6036 (d) A message specified in a FAIL return from the queryprogram router;
6037 (e) A message specified by the cannot_route_message router option.
6039 In these cases only, Exim does include the error details in bounce and
6040 warning messages. There are also a few cases where bland messages such
6041 as "unrouteable address" or "local delivery error" are given.
6043 PH/43 $value is now also set for the "else" part of a ${run expansion.
6045 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6046 being worked on, but at least Exim now implements the latest version to
6049 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6050 process to complete was treated as a delivery failure, a timeout while
6051 writing the message to the pipe was logged, but erroneously treated as a
6052 successful delivery. Such timeouts include transport filter timeouts. For
6053 consistency with the overall process timeout, these timeouts are now
6054 treated as errors, giving rise to delivery failures by default. However,
6055 there is now a new Boolean option for the pipe transport called
6056 timeout_defer, which, if set TRUE, converts the failures into defers for
6057 both kinds of timeout. A transport filter timeout is now identified in
6060 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6061 systems where "make" and "gmake" are different, calling "gmake" at top
6062 level broke things. I've arranged for the value of $(MAKE) to be passed
6063 from the Makefile to this script so that it can call the same version of
6067 A note about Exim versions 4.44 and 4.50
6068 ----------------------------------------
6070 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6071 changes of various kinds. As a consequence, a big documentation update was
6072 needed. This delayed the release for rather longer than seemed good, especially
6073 in the light of a couple of (minor) security issues. Therefore, the changes
6074 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6075 release. So 4.44 and 4.50 are in effect two different branches that both start
6078 I have left the 4.50 change log unchanged; it contains all the changes since
6079 4.43. The change log for 4.44 is below; many of its items are identical to
6080 those for 4.50. This seems to be the most sensible way to preserve the
6081 historical information.
6087 1. Minor wording change to the doc/README.SIEVE file.
6089 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6090 computation of the current number of files was incorrect.
6092 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6093 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6096 4. Give more explanation in the error message when the command for a transport
6097 filter fails to execute.
6099 5. There are several places where Exim runs a non-Exim command in a
6100 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6101 was being done only for the command run by the queryprogram router. It is
6102 now done for all such subprocesses. The other cases are: ${run, transport
6103 filters, and the commands run by the lmtp and pipe transports.
6105 6. Added CONFIGURE_GROUP build-time option.
6107 7. Some older OS have a limit of 256 on the maximum number of file
6108 descriptors. Exim was using setrlimit() to set 1000 as a large value
6109 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6110 systems. I've change it so that if it can't get 1000, it tries for 256.
6112 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6113 was an oversight, and furthermore, ever since the addition of extra
6114 controls (e.g. 4.43/32), the checks on when to allow different forms of
6115 "control" were broken. There should now be diagnostics for all cases when a
6116 control that does not make sense is encountered.
6118 9. Added the /retain_sender option to "control=submission".
6120 10. $recipients is now available in the predata ACL (oversight).
6122 11. Tidy the search cache before the fork to do a delivery from a message
6123 received from the command line. Otherwise the child will trigger a lookup
6124 failure and thereby defer the delivery if it tries to use (for example) a
6125 cached ldap connection that the parent has called unbind on.
6127 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6128 of $address_data from the recipient verification was clobbered by the
6129 sender verification.
6131 13. The value of address_data from a sender verification is now available in
6132 $sender_address_data in subsequent conditions in the ACL statement.
6134 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6136 15. Added a new option "connect=<time>" to callout options, to set a different
6139 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6140 was its contents. (It was OK if the option was not defined at all.)
6142 17. A "Completed" log line is now written for messages that are removed from
6143 the spool by the -Mrm option.
6145 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6146 information about exactly what failed.
6148 19. Added -dd to debug only the daemon process.
6150 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6151 handles timeouts, both on the server side and network timeouts. Renamed the
6152 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6154 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6155 It is now set to "smtps".
6157 22. $host_address is now set to the target address during the checking of
6158 ignore_target_hosts.
6160 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6161 being passed; this would have caused $sender_host_name to have been used if
6162 matching the list had actually called for a host name (not very likely,
6163 since this list is usually IP addresses). A host name is now passed as
6166 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6167 code that specifies a non-restarting handler (typically sigaction() in
6168 modern systems) in an attempt to fix a rare and obscure crash bug.
6170 25. Narrowed the window for a race in the daemon that could cause it to ignore
6171 SIGCHLD signals. This is not a major problem, because they are used only to
6172 wake it up if nothing else does.
6174 26. A malformed maildirsize file could cause Exim to calculate negative values
6175 for the mailbox size or file count. Odd effects could occur as a result.
6176 The maildirsize information is now recalculated if the size or filecount
6179 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6180 support for a long time. Removed HAVE_SYS_VFS_H.
6182 28. Installed the latest version of exipick from John Jetmore.
6184 29. In an address list, if the pattern was not a regular expression, an empty
6185 subject address (from a bounce message) matched only if the pattern was an
6186 empty string. Non-empty patterns were not even tested. This was the wrong
6187 because it is perfectly reasonable to use an empty address as part of a
6188 database query. An empty address is now tested by patterns that are
6189 lookups. However, all the other forms of pattern expect the subject to
6190 contain a local part and a domain, and therefore, for them, an empty
6191 address still always fails if the pattern is not itself empty.
6193 30. Exim went into a mad DNS loop when attempting to do a callout where the
6194 host was specified on an smtp transport, and looking it up yielded more
6195 than one IP address.
6197 31. Re-factored the code for checking spool and log partition space into a
6198 function that finds that data and another that does the check. The former
6199 is then used to implement four new variables: $spool_space, $log_space,
6200 $spool_inodes, and $log_inodes.
6202 32. The RFC2047 encoding function was originally intended for short strings
6203 such as real names; it was not keeping to the 75-character limit for
6204 encoded words that the RFC imposes. It now respects the limit, and
6205 generates multiple encoded words if necessary. To be on the safe side, I
6206 have increased the buffer size for the ${rfc2047: expansion operator from
6209 33. It is now permitted to omit both strings after an "if" condition; if the
6210 condition is true, the result is "true". As before, when the second string
6211 is omitted, a false condition yields an empty string. This makes it less
6212 cumbersome to write custom ACL and router conditions.
6214 34. Failure to deliver a bounce message always caused it to be frozen, even if
6215 there was an errors_to setting on the router. The errors_to setting is now
6218 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6219 canonical form (fully expanded) before being placed in
6220 $sender_host_address.
6222 36. The table in the code that translates DNS record types into text (T_A to
6223 "A" for instance) was missing entries for NS and CNAME. It is just possible
6224 that this could have caused confusion if both these types were looked up
6225 for the same domain, because the text type is used as part of Exim's
6226 per-process caching. But the chance of anyone hitting this buglet seems
6229 37. The dnsdb lookup has been extended in a number of ways.
6231 (1) There is a new type, "zns", which walks up the domain tree until it
6232 finds some nameserver records. It should be used with care.
6234 (2) There is a new type, "mxh", which is like "mx" except that it returns
6235 just the host names, not the priorities.
6237 (3) It is now possible to give a list of domains (or IP addresses) to be
6238 looked up. The behaviour when one of the lookups defers can be
6239 controlled by a keyword.
6241 (4) It is now possible to specify the separator character for use when
6242 multiple records are returned.
6244 38. The dnslists ACL condition has been extended: it is now possible to supply
6245 a list of IP addresses and/or domains to be looked up in a particular DNS
6248 39. Added log_selector=+queue_time_overall.
6250 40. When running the queue in the test harness, wait just a tad after forking a
6251 delivery process, to get repeatability of debugging output.
6253 41. Include certificate and key file names in error message when GnuTLS fails
6254 to set them up, because the GnuTLS error message doesn't include the name
6255 of the failing file when there is a problem reading it.
6257 42. Allow both -bf and -bF in the same test run.
6259 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6261 44. The "Exiscan patch" is now merged into the mainline Exim source.
6263 45. Sometimes the final signoff response after QUIT could fail to get
6264 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6265 < 0 before doing a fflush(). This bug looks as though it goes back to the
6266 introduction of TLS in release 3.20, but "sometimes" must have been rare
6267 because the tests only now provoked it.
6269 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6270 (this can affect the format of dates).
6272 47. exim_tidydb, when checking for the continued existence of a message for
6273 which it has found a message-specific retry record, was not finding
6274 messages that were in split spool directories. Consequently, it was
6275 deleting retry records that should have stayed in existence.
6277 48. Steve fixed some bugs in eximstats.
6279 49. The SPA authentication driver was not abandoning authentication and moving
6280 on to the next authenticator when an expansion was forced to fail,
6281 contradicting the general specification for all authenticators. Instead it
6282 was generating a temporary error. It now behaves as specified.
6284 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6285 (the order specifies the preference for clients). The order is now AES256,
6286 AES128, 3DES, ARCFOUR128.
6288 51. Small patch to Sieve code - explicitly set From: when generating an
6291 52. Exim crashed if a remote delivery caused a very long error message to be
6292 recorded - for instance if somebody sent an entire SpamAssassin report back
6293 as a large number of 550 error lines. This bug was coincidentally fixed by
6294 increasing the size of one of Exim's internal buffers (big_buffer) that
6295 happened as part of the Exiscan merge. However, to be on the safe side, I
6296 have made the code more robust (and fixed the comments that describe what
6299 53. Now that there can be additional text after "Completed" in log lines (if
6300 the queue_time_overall log selector is set), a one-byte patch to exigrep
6301 was needed to allow it to recognize "Completed" as not the last thing in
6304 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6305 patch that reportedly fixes this has been added. I am not expert enough to
6306 create a test for it. This is what the patch creator wrote:
6308 "I found a little strange behaviour of ldap code when working with
6309 Windows 2003 AD Domain, where users was placed in more than one
6310 Organization Units. When I tried to give exim partial DN, the exit code
6311 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6312 But simultaneously result of request was absolutely normal ldap result,
6313 so I produce this patch..."
6315 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6316 REFERENCE, so I have modified the code to exclude the patch when that macro
6319 55. Some experimental protocols are using DNS PTR records for new purposes. The
6320 keys for these records are domain names, not reversed IP addresses. The
6321 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6322 leaves it alone. Component reversal etc. now happens only for IP addresses.
6325 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6327 57. Double the size of the debug message buffer (to 2048) so that more of very
6328 long debug lines gets shown.
6330 58. The exicyclog utility now does better if the number of log files to keep
6331 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6333 59. Two changes related to the smtp_active_hostname option:
6335 (1) $smtp_active_hostname is now available as a variable.
6336 (2) The default for smtp_banner uses $smtp_active_hostname instead
6337 of $primary_hostname.
6339 60. The host_aton() function is supposed to be passed a string that is known
6340 to be a valid IP address. However, in the case of IPv6 addresses, it was
6341 not checking this. This is a hostage to fortune. Exim now panics and dies
6342 if the condition is not met. A case was found where this could be provoked
6343 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6344 components; fortuitously, this particular loophole had already been fixed
6345 by change 4.50/55 above.
6347 If there are any other similar loopholes, the new check in host_aton()
6348 itself should stop them being exploited. The report I received stated that
6349 data on the command line could provoke the exploit when Exim was running as
6350 exim, but did not say which command line option was involved. All I could
6351 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6352 running as the user.
6355 61. There was a buffer overflow vulnerability in the SPA authentication code
6356 (which came originally from the Samba project). I have added a test to the
6357 spa_base64_to_bits() function which I hope fixes it.
6360 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6361 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6363 63. The daemon start-up calls getloadavg() while still root for those OS that
6364 need the first call to be done as root, but it missed one case: when
6365 deliver_queue_load_max is set with deliver_drop_privilege. This is
6366 necessary for the benefit of the queue runner, because there is no re-exec
6367 when deliver_drop_privilege is set.
6369 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6370 This has been fixed.
6372 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6373 was in use, was not putting the data itself into the right store pool;
6374 consequently, it could be overwritten for a subsequent message in the same
6375 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6378 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6380 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6381 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6382 the function were treating the return as a boolean value, which happened to
6383 work because 0=false and not-0=true, but is not correct code.
6385 68. The host_aton() function was not handling scoped IPv6 addresses (those
6386 with, for example, "%eth0" on the end) correctly.
6388 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6389 negated items (that is, ~something) in unsigned ints. Some compilers
6390 apparently mutter when there is no cast.
6392 70. If an address verification called from an ACL failed, and did not produce a
6393 user-specific message (i.e. there was only a "system" message), nothing was
6394 put in $acl_verify_message. In this situation, it now puts the system
6397 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6398 session; change 4.31/43 added the unwanted input to the log line - except
6399 that it did not do this in the start of session case. It now does.
6401 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6402 This is wrong and can cause the other end to generate a synchronization
6403 error if it is another Exim or anything else that does the synchronization
6404 check. A QUIT command is no longer sent after a timeout.
6406 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6407 during host lookups.
6409 74. The defer_ok option of callout verification was not working if it was used
6410 when verifying addresses in header lines, that is, for this case:
6412 verify = header_sender/callout=defer_ok
6414 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6415 those file descriptors could be used for SMTP connections. If anything
6416 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6417 could be sent to the SMTP client, causing chaos. The daemon now opens
6418 stdin, stdout, and stderr to /dev/null when it puts itself into the
6421 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6422 log by default. The user can override this with suitable Perl magic.
6424 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6425 the log message when discard triggers, was not working for the DATA ACL or
6426 for the non-SMTP ACL.
6428 78. Error message wording change in sieve.c.
6430 79. If smtp_accept_max_per_host was set, the number of connections could be
6431 restricted to fewer than expected, because the daemon was trying to set up
6432 a new connection before checking whether the processes handling previous
6433 connections had finished. The check for completed processes is now done
6434 earlier. On busy systems, this bug wouldn't be noticed because something
6435 else would have woken the daemon, and it would have reaped the completed
6438 80. If a message was submitted locally by a user whose login name contained one
6439 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6440 It caused a spool format error. I have fixed the spool reading code. A
6441 related problem was that the "from" clause in the Received: line became
6442 illegal because of the space(s). It is now covered by ${quote_local_part.
6444 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6447 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6449 83. Patch from Sieve maintainer to fix unterminated string problem in
6450 "vacation" handling.
6452 84. Some minor changes to the Linux configuration files to help with other
6453 OS variants using glibc.
6455 85. One more patch for Sieve to update vacation handling to latest spec.
6458 ----------------------------------------------------
6459 See the note above about the 4.44 and 4.50 releases.
6460 ----------------------------------------------------
6466 1. Change 4.43/35 introduced a bug that caused file counts to be
6467 incorrectly computed when quota_filecount was set in an appendfile
6470 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6471 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6474 3. Give more explanation in the error message when the command for a transport
6475 filter fails to execute.
6477 4. There are several places where Exim runs a non-Exim command in a
6478 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6479 was being done only for the command run by the queryprogram router. It is
6480 now done for all such subprocesses. The other cases are: ${run, transport
6481 filters, and the commands run by the lmtp and pipe transports.
6483 5. Some older OS have a limit of 256 on the maximum number of file
6484 descriptors. Exim was using setrlimit() to set 1000 as a large value
6485 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6486 systems. I've change it so that if it can't get 1000, it tries for 256.
6488 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6489 was an oversight, and furthermore, ever since the addition of extra
6490 controls (e.g. 4.43/32), the checks on when to allow different forms of
6491 "control" were broken. There should now be diagnostics for all cases when a
6492 control that does not make sense is encountered.
6494 7. $recipients is now available in the predata ACL (oversight).
6496 8. Tidy the search cache before the fork to do a delivery from a message
6497 received from the command line. Otherwise the child will trigger a lookup
6498 failure and thereby defer the delivery if it tries to use (for example) a
6499 cached ldap connection that the parent has called unbind on.
6501 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6502 of $address_data from the recipient verification was clobbered by the
6503 sender verification.
6505 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6506 was its contents. (It was OK if the option was not defined at all.)
6508 11. A "Completed" log line is now written for messages that are removed from
6509 the spool by the -Mrm option.
6511 12. $host_address is now set to the target address during the checking of
6512 ignore_target_hosts.
6514 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6515 being passed; this would have caused $sender_host_name to have been used if
6516 matching the list had actually called for a host name (not very likely,
6517 since this list is usually IP addresses). A host name is now passed as
6520 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6521 code that specifies a non-restarting handler (typically sigaction() in
6522 modern systems) in an attempt to fix a rare and obscure crash bug.
6524 15. Narrowed the window for a race in the daemon that could cause it to ignore
6525 SIGCHLD signals. This is not a major problem, because they are used only to
6526 wake it up if nothing else does.
6528 16. A malformed maildirsize file could cause Exim to calculate negative values
6529 for the mailbox size or file count. Odd effects could occur as a result.
6530 The maildirsize information is now recalculated if the size or filecount
6533 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6534 support for a long time. Removed HAVE_SYS_VFS_H.
6536 18. Updated exipick to current release from John Jetmore.
6538 19. Allow an empty sender to be matched against a lookup in an address list.
6539 Previously the only cases considered were a regular expression, or an
6542 20. Exim went into a mad DNS lookup loop when doing a callout where the
6543 host was specified on the transport, if the DNS lookup yielded more than
6546 21. The RFC2047 encoding function was originally intended for short strings
6547 such as real names; it was not keeping to the 75-character limit for
6548 encoded words that the RFC imposes. It now respects the limit, and
6549 generates multiple encoded words if necessary. To be on the safe side, I
6550 have increased the buffer size for the ${rfc2047: expansion operator from
6553 22. Failure to deliver a bounce message always caused it to be frozen, even if
6554 there was an errors_to setting on the router. The errors_to setting is now
6557 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6558 canonical form (fully expanded) before being placed in
6559 $sender_host_address.
6561 24. Updated eximstats to version 1.33
6563 25. Include certificate and key file names in error message when GnuTLS fails
6564 to set them up, because the GnuTLS error message doesn't include the name
6565 of the failing file when there is a problem reading it.
6567 26. Expand error message when OpenSSL has problems setting up cert/key files.
6570 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6571 (this can affect the format of dates).
6573 28. exim_tidydb, when checking for the continued existence of a message for
6574 which it has found a message-specific retry record, was not finding
6575 messages that were in split spool directories. Consequently, it was
6576 deleting retry records that should have stayed in existence.
6578 29. eximstats updated to version 1.35
6579 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6580 1.35 - bugfix such that pie charts by volume are generated correctly
6582 30. The SPA authentication driver was not abandoning authentication and moving
6583 on to the next authenticator when an expansion was forced to fail,
6584 contradicting the general specification for all authenticators. Instead it
6585 was generating a temporary error. It now behaves as specified.
6587 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6588 (the order specifies the preference for clients). The order is now AES256,
6589 AES128, 3DES, ARCFOUR128.
6591 31. Small patch to Sieve code - explicitly set From: when generating an
6594 32. Exim crashed if a remote delivery caused a very long error message to be
6595 recorded - for instance if somebody sent an entire SpamAssassin report back
6596 as a large number of 550 error lines. This bug was coincidentally fixed by
6597 increasing the size of one of Exim's internal buffers (big_buffer) that
6598 happened as part of the Exiscan merge. However, to be on the safe side, I
6599 have made the code more robust (and fixed the comments that describe what
6602 33. Some experimental protocols are using DNS PTR records for new purposes. The
6603 keys for these records are domain names, not reversed IP addresses. The
6604 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6605 leaves it alone. Component reversal etc. now happens only for IP addresses.
6608 34. The host_aton() function is supposed to be passed a string that is known
6609 to be a valid IP address. However, in the case of IPv6 addresses, it was
6610 not checking this. This is a hostage to fortune. Exim now panics and dies
6611 if the condition is not met. A case was found where this could be provoked
6612 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6613 components; fortuitously, this particular loophole had already been fixed
6614 by change 4.50/55 or 4.44/33 above.
6616 If there are any other similar loopholes, the new check in host_aton()
6617 itself should stop them being exploited. The report I received stated that
6618 data on the command line could provoke the exploit when Exim was running as
6619 exim, but did not say which command line option was involved. All I could
6620 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6621 running as the user.
6624 35. There was a buffer overflow vulnerability in the SPA authentication code
6625 (which came originally from the Samba project). I have added a test to the
6626 spa_base64_to_bits() function which I hope fixes it.
6629 36. The daemon start-up calls getloadavg() while still root for those OS that
6630 need the first call to be done as root, but it missed one case: when
6631 deliver_queue_load_max is set with deliver_drop_privilege. This is
6632 necessary for the benefit of the queue runner, because there is no re-exec
6633 when deliver_drop_privilege is set.
6635 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6636 was in use, was not putting the data itself into the right store pool;
6637 consequently, it could be overwritten for a subsequent message in the same
6638 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6641 38. Sometimes the final signoff response after QUIT could fail to get
6642 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6643 < 0 before doing a fflush(). This bug looks as though it goes back to the
6644 introduction of TLS in release 3.20, but "sometimes" must have been rare
6645 because the tests only now provoked it.
6651 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6652 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6653 Now it returns an integer. A number of calls were still expecting a T/F
6654 return. Fortuitously, in all cases, the tests worked in OK situations,
6655 which is the norm. However, things would have gone wrong on any write
6656 failures on the smtp file descriptor. This function is used when sending
6657 messages over SMTP and also when doing verify callouts.
6659 2. When Exim is called to do synchronous delivery of a locally submitted
6660 message (the -odf or -odi options), it no longer closes stderr before doing
6663 3. Implemented the mua_wrapper option.
6665 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6667 5. Implemented the functions header_remove(), header_testname(),
6668 header_add_at_position(), and receive_remove_recipient(), and exported them
6671 6. If an ACL "warn" statement specified the addition of headers, Exim already
6672 inserted X-ACL-Warn: at the start if there was no header name. However, it
6673 was not making this test for the second and subsequent header lines if
6674 there were newlines in the string. This meant that an invalid header could
6675 be inserted if Exim was badly configured.
6677 7. Allow an ACL "warn" statement to add header lines at the start or after all
6678 the Received: headers, as well as at the end.
6680 8. Added the rcpt_4xx retry error code.
6682 9. Added postmaster_mailfrom=xxx to callout verification option.
6684 10. Added mailfrom=xxxx to the callout verification option, for verify=
6687 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6688 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6690 12. Inserted some casts to stop certain compilers warning when using pointer
6691 differences as field lengths or precisions in printf-type calls (mostly
6692 affecting debugging statements).
6694 13. Added optional readline() support for -be (dynamically loaded).
6696 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6697 same clock tick as a message's arrival, so that its received time was the
6698 same as the "first fail" time on the retry record, and that message
6699 remained on the queue past the ultimate address timeout, every queue runner
6700 would try a delivery (because it was past the ultimate address timeout) but
6701 after another failure, the ultimate address timeout, which should have then
6702 bounced the address, did not kick in. This was a "< instead of <=" error;
6703 in most cases the first failure would have been in the next clock tick
6704 after the received time, and all would be well.
6706 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6707 being recognized when the domain list was tested by the match_domain
6708 condition in an expansion string.
6710 16. Added the ${str2b64: operator.
6712 17. Exim was always calling setrlimit() to set a large limit for the number of
6713 processes, without checking whether the existing limit was already
6714 adequate. (It did check for the limit on file descriptors.) Furthermore,
6715 errors from getrlimit() and setrlimit() were being ignored. Now they are
6716 logged to the main and panic logs, but Exim does carry on, to try to do its
6717 job under whatever limits there are.
6719 18. Imported PCRE 5.0.
6721 19. Trivial typo in log message " temporarily refused connection" (the leading
6724 20. If the log selector return_path_on_delivery was set and an address was
6725 redirected to /dev/null, the delivery process crashed because it assumed
6726 that a return path would always be set for a "successful" delivery. In this
6727 case, the whole delivery is bypassed as an optimization, and therefore no
6730 21. Internal re-arrangement: the function for sending a challenge and reading
6731 a response while authentication was assuming a zero-terminated challenge
6732 string. It's now changed to take a pointer and a length, to allow for
6733 binary data in such strings.
6735 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6737 23. Exim was not respecting finduser_retries when seeking the login of the
6738 uid under which it was called; it was always trying 10 times. (The default
6739 setting of finduser_retries is zero.) Also, it was sleeping after the final
6740 failure, which is pointless.
6742 24. Implemented tls_on_connect_ports.
6744 25. Implemented acl_smtp_predata.
6746 26. If the domain in control=submission is set empty, Exim assumes that the
6747 authenticated id is a complete email address when it generates From: or
6748 Sender: header lines.
6750 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6751 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6752 chown and chgrp in /bin and hostname in /usr/bin.
6754 28. Exim was keeping the "process log" file open after each use, just as it
6755 does for the main log. This opens the possibility of it remaining open for
6756 long periods when the USR1 signal hits a daemon. Occasional processlog
6757 errors were reported, that could have been caused by this. Anyway, it seems
6758 much more sensible not to leave this file open at all, so that is what now
6761 29. The long-running daemon process does not normally write to the log once it
6762 has entered its main loop, and it closes the log before doing so. This is
6763 so that log files can straightforwardly be renamed and moved. However,
6764 there are a couple of unusual error situations where the daemon does write
6765 log entries, and I had neglected to close the log afterwards.
6767 30. The text of an SMTP error response that was received during a remote
6768 delivery was being truncated at 512 bytes. This is too short for some of
6769 the long messages that one sometimes sees. I've increased the limit to
6772 31. It is now possible to make retry rules that apply only when a message has a
6773 specific sender, in particular, an empty sender.
6775 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6776 it possible to be selective about when SMTP synchronization is enforced.
6778 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6780 32. Implemented hosts_connection_nolog.
6782 33. Added an ACL for QUIT.
6784 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6787 35. Added mailbox_size and mailbox_filecount to appendfile.
6789 36. Added control = no_multiline_responses to ACLs.
6791 37. There was a bug in the logic of the code that waits for the clock to tick
6792 in the case where the clock went backwards by a substantial amount such
6793 that the microsecond fraction of "now" was more than the microsecond
6794 fraction of "then" (but the whole seconds number was less).
6796 38. Added support for the libradius Radius client library this is found on
6797 FreeBSD (previously only the radiusclient library was supported).
6803 1. When certain lookups returned multiple values in the form name=value, the
6804 quoting of the values was not always being done properly. Specifically:
6805 (a) If the value started with a double quote, but contained no whitespace,
6807 (b) If the value contained whitespace other than a space character (i.e.
6808 tabs or newlines or carriage returns) it was not quoted.
6809 This fix has been applied to the mysql and pgsql lookups by writing a
6810 separate quoting function and calling it from the lookup code. The fix
6811 should probably also be applied to nisplus, ibase and oracle lookups, but
6812 since I cannot test any of those, I have not disturbed their existing code.
6814 2. A hit in the callout cache for a specific address caused a log line with no
6815 reason for rejecting RCPT. Now it says "Previous (cached) callout
6816 verification failure".
6818 3. There was an off-by-one bug in the queryprogram router. An over-long
6819 return line was truncated at 256 instead of 255 characters, thereby
6820 overflowing its buffer with the terminating zero. As well as fixing this, I
6821 have increased the buffer size to 1024 (and made a note to document this).
6823 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6824 when Exim is waiting for an SMTP response from a remote server, Exim
6825 restarts its select() call on the socket, thereby resetting its timeout.
6826 This is not a problem when such interrupts are rare. Somebody set up a cron
6827 job to run exiwhat every 2 minutes, which is less than the normal select()
6828 timeout (5 or 10 minutes). This meant that the select() timeout never
6829 kicked in because it was always reset. I have fixed this by comparing the
6830 time when an interrupt arrives with the time at the start of the first call
6831 to select(). If more time than the timeout has elapsed, the interrupt is
6832 treated as a timeout.
6834 5. Some internal re-factoring in preparation for the addition of Sieve
6835 extensions (by MH). In particular, the "personal" test is moved to a
6836 separate function, and given an option for scanning Cc: and Bcc: (which is
6837 not set for Exim filters).
6839 6. When Exim created an email address using the login of the caller as the
6840 local part (e.g. when creating a From: or Sender: header line), it was not
6841 quoting the local part when it contained special characters such as @.
6843 7. Installed new OpenBSD configuration files.
6845 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6846 try to make them clearer.
6848 9. Callout options, other than the timeout value, were being ignored when
6849 verifying sender addresses in header lines. For example, when using
6851 verify = header_sender/callout=no_cache
6853 the cache was (incorrectly) being used.
6855 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6856 only the Cygwin environment.
6858 11. When return_path_on_delivery was set as a log selector, if different remote
6859 addresses in the same message used different return paths and parallel
6860 remote delivery occurred, the wrong values would sometimes be logged.
6861 (Whenever a remote delivery process finished, the return path value from
6862 the most recently started remote delivery process was logged.)
6864 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6865 lines when AUTH and/or TLS are in use. This is the "received protocol"
6866 field. Exim used to use "asmtp" for authenticated SMTP, without any
6867 indication (in the protocol name) for TLS use. Now it follows the RFC and
6868 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6869 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6870 names appear in log lines as well as in Received: header lines.
6872 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6873 extensions, and comparison tests, and to fix some bugs.
6875 14. Changes to the "personal" filter test:
6877 (1) The test was buggy in that it was just doing the equivalent of
6878 "contains" tests on header lines. For example, if a user's address was
6879 anne@some.where, the "personal" test would incorrectly be true for
6881 To: susanne@some.where
6883 This test is now done by extracting each address from the header in turn,
6884 and checking the entire address. Other tests that are part of "personal"
6885 are now done using regular expressions (for example, to check local parts
6886 of addresses in From: header lines).
6888 (2) The list of non-personal local parts in From: addresses has been
6889 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6890 taken from the Sieve specification recommendations.
6892 (3) If the message contains any header line starting with "List-" it is
6893 treated as non-personal.
6895 (4) The test for "circular" in the Subject: header line has been removed
6896 because it now seems ill-conceived.
6898 15. Minor typos in src/EDITME comments corrected.
6900 16. Installed latest exipick from John Jetmore.
6902 17. If headers_add on a router specified a text string that was too long for
6903 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6904 of string_sprintf() is now avoided.
6906 18. $message_body_size was not set (it was always zero) when running the DATA
6907 ACL and the local_scan() function.
6909 19. For the "mail" command in an Exim filter, no default was being set for
6910 the once_repeat time, causing a random time value to be used if "once" was
6911 specified. (If the value happened to be <= 0, no repeat happened.) The
6912 default is now 0s, meaning "never repeat". The "vacation" command was OK
6913 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6914 (I found it when inspecting the code).
6916 20. There is now an overall timeout for performing a callout verification. It
6917 defaults to 4 times the callout timeout, which applies to individual SMTP
6918 commands during the callout. The overall timeout applies when there is more
6919 than one host that can be tried. The timeout is checked before trying the
6920 next host. This prevents very long delays if there are a large number of
6921 hosts and all are timing out (e.g. when the network connections are timing
6922 out). The value of the overall timeout can be changed by specifying an
6923 additional sub-option for "callout", called "maxwait". For example:
6925 verify = sender/callout=5s,maxwait=20s
6927 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6928 to the end before writing, but this should make it even safer).
6930 22. Exim was forgetting that it had advertised PIPELINING for the second and
6931 subsequent messages on an SMTP connection. It was also not resetting its
6932 memory on STARTTLS and an internal HELO.
6934 23. When Exim logs an SMTP synchronization error within a session, it now
6935 records whether PIPELINING has been advertised or not.
6937 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6938 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6939 rather than long int.
6941 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6943 26. Added the never_mail option to autoreply.
6949 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6950 crash if the getsockname() call failed; this can happen if a connection is
6951 closed very soon after it is established. The problem was simply in the
6952 order in which certain operations were done, causing Exim to try to write
6953 to the SMTP stream before it had set up the file descriptor. The bug has
6954 been fixed by making things happen in the correct order.
6960 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6961 before the connection was closed, thus losing the rejection response.
6963 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6964 some early Solaris releases, but causes trouble in current releases where
6965 socklen_t is defined.
6967 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6970 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6973 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6974 that releasing the top of it at the end releases what was used for sub-
6975 expansions (unless the block got too big). However, discard this block if
6976 the first thing is a variable or header, so that we can use its block when
6977 it is dynamic (useful for very large $message_headers, for example).
6979 6. Lookups now cache *every* query, not just the most recent. A new, separate
6980 store pool is used for this. It can be recovered when all lookup caches are
6981 flushed. Lookups now release memory at the end of their result strings.
6982 This has involved some general refactoring of the lookup sources.
6984 7. Some code has been added to the store_xxx() functions to reduce the amount
6985 of flapping under certain conditions.
6987 8. log_incoming_interface used to affect only the <= reception log lines. Now
6988 it causes the local interface and port to be added to several more SMTP log
6989 lines, for example "SMTP connection from", and rejection lines.
6991 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6993 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6995 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6996 could be overwritten at the end of the current message (or the start of a
6997 new message if it was set in a HELO ACL). The value is now preserved for
6998 the duration of the SMTP connection.
7000 12. If a transport had a headers_rewrite setting, and a matching header line
7001 contained an unqualified address, that address was qualified, even if it
7002 did not match any rewriting rules. The underlying bug was that the values
7003 of the flags that permit the existence of unqualified sender and recipient
7004 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
7005 non-local messages, and by -bnq for local messages) were not being
7006 preserved with the message after it was received.
7008 13. When Exim was logging an SMTP synchronization error, it could sometimes log
7009 "next input=" as part of the text comprising the host identity instead of
7010 the correct text. The code was using the same buffer for two different
7011 strings. However, depending on which order the printing function evaluated
7012 its arguments, the bug did not always show up. Under Linux, for example, my
7013 test suite worked just fine.
7015 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
7016 doesn't work with some older versions of Perl. It has been changed to "my",
7017 which in any case is probably the better facility to use.
7019 15. A really picky compiler found some instances of statements for creating
7020 error messages that either had too many or two few arguments for the format
7023 16. The size of the buffer for calls to the DNS resolver has been increased
7024 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7025 for addresses that have a lot of PTR records. This alleviates a problem; it
7026 does not fully solve it.
7028 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7029 buffer now truncates the list and logs the incident, which is the same
7030 action as happens when Exim is looking up a host name and its aliases.
7031 Previously in this situation something unpredictable would happen;
7032 sometimes it was "internal error: store_reset failed".
7034 18. If a server dropped the connection unexpectedly when an Exim client was
7035 using GnuTLS and trying to read a response, the client delivery process
7036 crashed while trying to generate an error log message.
7038 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7039 string, for example:
7041 warn message = H1: something\nH2: something
7043 the text was added as a single header line from Exim's point of view
7044 though it ended up OK in the delivered message. However, searching for the
7045 second and subsequent header lines using $h_h2: did not work. This has been
7046 fixed. Similarly, if a system filter added multiple headers in this way,
7047 the routers could not see them.
7049 20. Expanded the error message when iplsearch is called with an invalid key to
7050 suggest using net-iplsearch in a host list.
7052 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7053 ACLs are no longer actually imposed (and a message to that effect is
7056 22. If a "gecos" field in a passwd entry contained escaped characters, in
7057 particular, if it contained a \" sequence, Exim got it wrong when building
7058 a From: or a Sender: header from that name. A second bug also caused
7059 incorrect handling when an unquoted " was present following a character
7060 that needed quoting.
7062 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7063 was not being matched caselessly.
7065 24. Arranged for all hyphens in the exim.8 source to be escaped with
7068 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7069 properly. Recipient callout cache records were still being keyed to include
7070 the sender, even when use_sender was set false. This led to far more
7071 callouts that were necessary. The sender is no longer included in the key
7072 when use_sender is false.
7074 26. Added "control = submission" modifier to ACLs.
7076 27. Added the ${base62d: operator to decode base 62 numbers.
7078 28. dnsdb lookups can now access SRV records.
7080 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7081 the configuration file.
7083 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7084 (-v) mode. This makes the output for a verbose queue run more intelligible.
7086 31. Added a use_postmaster feature to recipient callouts.
7088 32. Added the $body_zerocount variable, containing the number of binary zero
7089 bytes in the message body.
7091 33. The time of last modification of the "new" subdirectory is now used as the
7092 "mailbox time last read" when there is a quota error for a maildir
7095 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7097 35. Added +ignore_unknown as a special item in host lists.
7099 36. Code for decoding IPv6 addresses in host lists is now included, even if
7100 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7101 address was recognized as an IP address, but was then not correctly decoded
7102 into binary, causing unexpected and incorrect effects when compared with
7109 1. Very minor rewording of debugging text in manualroute to say "list of
7110 hosts" instead of "hostlist".
7112 2. If verify=header_syntax was set, and a header line with an unqualified
7113 address (no domain) and a large number of spaces between the end of the
7114 name and the colon was received, the reception process suffered a buffer
7115 overflow, and (when I tested it) crashed. This was caused by some obsolete
7116 code that should have been removed. The fix is to remove it!
7118 3. When running in the test harness, delay a bit after writing a bounce
7119 message to get a bit more predictability in the log output.
7121 4. Added a call to search_tidyup() just before forking a reception process. In
7122 theory, someone could use a lookup in the expansion of smtp_accept_max_
7123 per_host which, without the tidyup, could leave open a database connection.
7125 5. Added the variables $recipient_data and $sender_data which get set from a
7126 lookup success in an ACL "recipients" or "senders" condition, or a router
7127 "senders" option, similar to $domain_data and $local_part_data.
7129 6. Moved the writing of debug_print from before to after the "senders" test
7132 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7133 problems for message scanning, either using a data ACL, or using
7134 local_scan() because the Received: header was not generated till after they
7135 were called (in order to set the time as the time of reception completion).
7136 I have revised the way this works. The header is now generated after the
7137 body is received, but before the ACL or local_scan() are called. After they
7138 are run, the timestamp in the header is updated.
7144 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7145 before starting a queue runner without re-exec. This happened only when
7146 deliver_drop_privilege was set or when the Exim user was set to root. The
7147 effect of the bug was that timeouts during subsequent deliveries caused
7148 crashes instead of being properly handled. The handler is now left at its
7149 default (and expected) setting.
7151 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7152 message, again when deliver_drop_privilege is set or Exim is run as root.
7153 The bug described in (1) was not present in this case, but the tidying up
7154 of the other signals was missing. I have made the two cases consistent.
7156 3. The ignore_target_hosts setting on a manualroute router was being ignored
7157 for hosts that were looked up using the /MX notation.
7159 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7162 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7163 operated on the sender address. After changing the $sender_address to <>
7164 for the sender address verify, Exim was re-instated it as the original
7165 (before rewriting) address, but remembering that it had rewritten it, so it
7166 wasn't rewriting it again. This bug also had the effect of breaking the
7167 sender address verification caching when the sender address was rewritten.
7169 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7170 This has been changed so that if the ip literal address matches
7171 ignore_target_hosts, the router declines.
7173 7. Added expansion conditions match_domain, match_address, and match_local_
7174 part (NOT match_host).
7176 8. The placeholder for the Received: header didn't have a length field set.
7178 9. Added code to Exim itself and to exim_lock to test for a specific race
7179 condition that could lead to file corruption when using MBX delivery. The
7180 issue is with the lockfile that is created in /tmp. If this file is removed
7181 after a process has opened it but before that process has acquired a lock,
7182 there is the potential for a second process to recreate the file and also
7183 acquire a lock. This could lead to two Exim processes writing to the file
7184 at the same time. The added code performs the same test as UW imapd; it
7185 checks after acquiring the lock that its file descriptor still refers to
7186 the same named file.
7188 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7189 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7192 11. Added the smtp_active_hostname option. If used, this will typically be made
7193 to depend on the incoming interface address. Because $interface_address is
7194 not set up until the daemon has forked a reception process, error responses
7195 that can happen earlier (such as "too many connections") no longer contain
7198 12. If an expansion in a condition on a "warn" statement fails because a lookup
7199 defers, the "warn" statement is abandoned, and the next ACL statement is
7200 processed. Previously this caused the whole ACL to be aborted.
7202 13. Added the iplsearch lookup type.
7204 14. Added ident_timeout as a log selector.
7206 15. Added tls_certificate_verified as a log selector.
7208 16. Added a global option tls_require_ciphers (compare the smtp transport
7209 option of the same name). This controls incoming TLS connections.
7211 17. I finally figured out how to make tls_require_ciphers do a similar thing
7212 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7213 before starting the TLS session.
7215 18. Tabs are now shown as \t in -bP output.
7217 19. If the log selector return_path_on_delivery was set, Exim crashed when
7218 bouncing a message because it had too many Received: header lines.
7220 20. If two routers both had headers_remove settings, and the first one included
7221 a superfluous trailing colon, the final name in the first list and the
7222 first name in the second list were incorrectly joined into one item (with a
7223 colon in the middle).
7229 1. Added -C and -D options to the exinext utility, mainly to make it easier
7230 to include in the automated testing, but these could be helpful when
7231 multiple configurations are in use.
7233 2. The exinext utility was not formatting the output nicely when there was
7234 an alternate port involved in the retry record key, nor when there was a
7235 message id as well (for retries that were specific to a specific message
7236 and a specific host). It was also confused by IPv6 addresses, because of
7237 the additional colons they contain. I have fixed the IPv4 problem, and
7238 patched it up to do a reasonable job for IPv6.
7240 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7241 delivery, the log line now contains "pipelined" if PIPELINING was used.
7243 4. An SMTP transport process used to panic and die if the bind() call to set
7244 an explicit outgoing interface failed. This has been changed; it is now
7245 treated in the same way as a connect() failure.
7247 5. A reference to $sender_host_name in the part of a conditional expansion
7248 that was being skipped was still causing a DNS lookup. This no longer
7251 6. The def: expansion condition was not recognizing references to header lines
7252 that used bh_ and bheader_.
7254 7. Added the _cache feature to named lists.
7256 8. The code for checking quota_filecount in the appendfile transport was
7257 allowing one more file than it should have been.
7259 9. For compatibility with Sendmail, the command line option
7267 and sets the incoming protocol and host name (for trusted callers). The
7268 host name and its colon can be omitted when only the protocol is to be set.
7269 Note the Exim already has two private options, -pd and -ps, that refer to
7270 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7271 "s", but I don't think that's a major issue.
7273 10. A number of refactoring changes to the code, none of which should affect
7276 (a) The number of logging options was getting close to filling up the
7277 32-bit word that was used as a bit map. I have split them into two classes:
7278 those that are passed in the argument to log_write(), and those that are
7279 only ever tested independently outside of that function. These are now in
7280 separate 32-bit words, so there is plenty of room for expansion again.
7281 There is no change in the user interface or the logging behaviour.
7283 (b) When building, for example, log lines, the code previously used a
7284 macro that called string_cat() twice, in order to add two strings. This is
7285 not really sufficiently general. Furthermore, there was one instance where
7286 it was actually wrong because one of the argument was used twice, and in
7287 one call a function was used. (As it happened, calling the function twice
7288 did not affect the overall behaviour.) The macro has been replaced by a
7289 function that can join an arbitrary number of extra strings onto a growing
7292 (c) The code for expansion conditions now uses a table and a binary chop
7293 instead of a serial search (which was left over from when there were very
7294 few conditions). Also, it now recognizes conditions like "pam" even when
7295 the relevant support is not compiled in: a suitably worded error message is
7296 given if an attempt is made to use such a condition.
7298 11. Added ${time_interval:xxxxx}.
7300 12. A bug was causing one of the ddress fields not to be passed back correctly
7301 from remote delivery subprocesses. The field in question was not being
7302 subsequently used, so this caused to problems in practice.
7304 13. Added new log selectors queue_time and deliver_time.
7306 14. Might have fixed a bug in maildirsizefile handling that threw up
7307 "unexpected character" debug warnings, and recalculated the data
7308 unnecessarily. In any case, I expanded the warning message to give more
7311 15. Added the message "Restricted characters in address" to the statements in
7312 the default ACL that block characters like @ and % in local parts.
7314 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7315 Three changes have been made:
7317 (a) There was a serious bug; a negative response to MAIL caused the whole
7318 recipient domain to be cached as invalid, thereby blocking all messages
7319 to all local parts at the same domain, from all senders. This bug has
7320 been fixed. The domain is no longer cached after a negative response to
7321 MAIL if the sender used is not empty.
7323 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7326 (c) A new callout option, "use_sender" has been added for people who want
7327 the modified behaviour.
7333 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7336 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7337 indeed breaks things for older releases.
7339 3. Added additional logging to the case where there is a problem reading data
7340 from a filter that is running in a subprocess using a pipe, in order to
7341 try to track down a specific problem.
7343 4. Testing facility fudge: when running in the test harness and attempting
7344 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7345 getting "No route to host". Convert this to a timeout.
7347 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7350 6. Some OS don't have socklen_t but use size_t instead. This affects the
7351 fifth argument of getsockopt() amongst other things. This is now
7352 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7353 can be set for individual OS. I have set it for SunOS5, OSF1, and
7354 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7355 some earlier ones do not.
7357 7. Change 4.30/15 was not doing the test caselessly.
7359 8. The standard form for an IPv6 address literal was being rejected by address
7360 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7361 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7362 this, as well as the form without the "IPv6" on the front (but only when
7363 address literals are enabled, of course).
7365 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7367 10. Exim crashed if a message with an empty sender address specified by -f
7368 encountered a router with an errors_to setting. This could be provoked only
7369 by a command such as
7373 where an empty string was supplied; "<>" did not hit this bug.
7375 11. Installed PCRE release 4.5.
7377 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7378 remained set. It is now erased.
7380 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7381 times from message ids (which are base 36 rather than the normal 62).
7383 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7384 were being counted as actual protocol errors, and logged if the log
7385 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7386 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7387 and DATA following a set of rejected RCPTs do not count as protocol errors.
7388 In other words, Exim assumes they were pipelined, though this may not
7389 actually be the case. Of course, in all cases the client gets an
7390 appropriate error code.
7392 15. If a lookup fails in an ACL condition, a message about the failure may
7393 be available; it is used if testing the ACL cannot continue, because most
7394 such messages specify what the cause of the deferral is. However, some
7395 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7396 that caused an old message to be retained and used if a later statement
7397 caused a defer, replacing the real cause of the deferral.
7399 16. If an IP address had so many PTR records that the DNS lookup buffer
7400 was not large enough to hold them, Exim could crash while trying to process
7401 the truncated data. It now detects and logs this case.
7403 17. Further to 4.21/58, another change has been made: if (and only if) the
7404 first line of a message (the first header line) ends with CRLF, a bare LF
7405 in a subsequent header line has a space inserted after it, so as not to
7406 terminate the header.
7408 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7409 unnecessarily, used atoi() instead of strtol(), and didn't check the
7410 termination when getting file sizes from file names by regex.
7412 19. Completely re-implemented the support for maildirsize files, in the light
7413 of a number of problems with the previous contributed implementation
7414 (4.30/29). In particular:
7416 . If the quota is zero, the maildirsize file is maintained, but no quota is
7419 . If the maildir directory does not exist, it is created before any attempt
7420 to write a maildirsize file.
7422 . The quota value in the file is just a cache; if the quota is changed in
7423 the transport, the new value overrides.
7425 . A regular expression is available for excluding directories from the
7428 20. The autoreply transport checks the characters in options that define the
7429 message's headers; it allows continued headers, but it was checking with
7430 isspace() after an embedded newline instead of explicitly looking for a
7433 21. If all the "regular" hosts to which an address was routed had passed their
7434 expiry times, and had not reached their retry times, the address was
7435 bounced, even if fallback hosts were defined. Now Exim should go on to try
7438 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7439 equivalent code in the SMTP transport. Some hosts send humungous responses
7440 to HELO/EHLO, more than 1024 it seems.
7442 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7443 gives compiler warnings in some environments. I've now done it "properly",
7446 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7447 (because of problems with the built-in one) was declared to return uschar *
7448 instead of char *, causing compiler failure.
7450 25. Fixed a file descriptor leak when processing alias/forward files.
7452 26. Fixed a minor format string issue in dbfn.c.
7454 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7456 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7457 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7460 29. When a sender address is verified, it is cached, to save repeating the test
7461 when there is more than one recipient in a message. However, when the
7462 verification involves a callout, it is possible for different callout
7463 options to be set for different recipients. It is too complicated to keep
7464 track of this in the cache, so now Exim always runs a verification when a
7465 callout is required, relying on the callout cache for the optimization.
7466 The overhead is duplication of the address routing, but this should not be
7469 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7470 to be verified with callout=postmaster, and the main callout worked but the
7471 postmaster check failed, the verification correctly failed. However, if a
7472 subsequent RCPT command asked for sender verification *without* the
7473 postmaster check, incorrect caching caused this verification also to fail,
7476 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7477 it was not caching the DNS options (qualify_single, search_parents) that
7478 were used when the lookup failed. A subsequent lookup with different
7479 options therefore always gave the same answer, though there were cases
7480 where it should not have. (Example: a "domains = !$mx_any" option on a
7481 dnslookup router: the "domains" option is always processed without any
7482 widening, but the router might have qualify_single set.) Now Exim uses the
7483 cached value only when the same options are set.
7485 32. Added John Jetmore's "exipick" utility to the distribution.
7487 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7488 than a timeout (e.g. a certificate is required, and is not provided), an
7489 Exim server now closes the connection immediately. Previously it waited for
7490 the client to close - but if the client is SSL, it seems that they each
7491 wait for each other, leading to a delay before one of them times out.
7493 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7494 maintained 0.8.x compatibility because I don't think many are using it, and
7495 it is clearly obsolete.
7497 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7500 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7501 client certificate was expired. A simple patch fixes this, though I don't
7502 understand the full logic of why the verify callback is called multiple
7505 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7506 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7507 which causes problems with some clients (such as the Certicom SSL Plus
7508 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7509 disables the coutermeasure allowing Eudora to connect."
7511 38. Exim was not checking that a write() to a log file succeeded. This could
7512 lead to Bad Things if a log got too big, in particular if it hit a file
7513 size limit. Exim now panics and dies if it cannot write to a log file, just
7514 as it does if it cannot open a log file.
7516 39. Modified OS/Makefile-Linux so that it now contains
7518 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7520 The two -D definitions ensure that Exim is compiled with large file
7521 support, which makes it possible to handle log files that are bigger than
7524 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7525 instance) a domain was checked against a named list that involved a lookup,
7526 causing $domain_data to be set, then another domain was checked against the
7527 same list, then the first domain was re-checked, the value of $domain_data
7528 after the final check could be wrong. In particular, if the second check
7529 failed, it could be set empty. This bug probably also applied to
7532 41. The strip_trailing_dot option was not being applied to the address given
7533 with the -f command-line option.
7535 42. The code for reading a message's header from the spool was incrementing
7536 $received_count, but never initializing it. This meant that the value was
7537 incorrect (doubled) while delivering a message in the same process in which
7538 it was received. In the most common configuration of Exim, this never
7539 happens - a fresh exec is done - but it can happen when
7540 deliver_drop_privilege is set.
7542 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7543 it now includes up to 150 characters of the unexpected data in the log
7546 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7547 and building data strings. The size of both of these buffers was 10 000
7548 bytes - far larger than anybody would *ever* want, thought I. Needless to
7549 say, somebody hit the limit. I have increased the maximum line length to
7550 20 000 and the maximum data length of concatenated lines to 100 000. I have
7551 also fixed two bugs, because there was no checking on these buffers. Tsk,
7552 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7553 buffer is too small.
7555 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7556 lsearch lookups. Now it does.
7558 46. When parsing a route_list item in a manualroute router, a fixed-length
7559 buffer was used for the list of hosts. I made this 1024 bytes long,
7560 thinking that nobody would ever have a list of hosts that long. Wrong.
7561 Somebody had a whole pile of complicated expansion conditions, and the
7562 string was silently truncated, leading to an expansion error. It turns out
7563 that it is easier to change to an unlimited length (owing to other changes
7564 that have happened since this code was originally written) than to build
7565 structure for giving a limitation error. The length of the item that
7566 expands into the list of hosts is now unlimited.
7568 47. The lsearch lookup could not handle data where the length of text line was
7569 more than 4095 characters. Such lines were truncated, leading to shortened
7570 data being returned. It should now handle lines of any length.
7572 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7573 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7576 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7577 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7578 no longer happens in comment lines. A list of replacements is now placed
7579 at the head of all of the source files, except those whose only change is
7580 to replace PERL_COMMAND in the very first #! line.
7582 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7583 messages on the queue, with a bottom-up merge sort, using code contributed
7584 by Michael Haardt. This should make operations like -bp somewhat faster on
7585 large queues. It won't affect queue runners, except when queue_run_in_order
7588 51. Installed eximstats 1.31 in the distribution.
7590 52. Added support for SRV lookups to the dnslookup router.
7592 53. If an ACL referred to $message_body or $message_body_end, the value was not
7593 reset for any messages that followed in the same SMTP session.
7595 54. The store-handling optimization for building very long strings was not
7596 differentiating between the different store pools. I don't think this
7597 actually made any difference in practice, but I've tidied it.
7599 55. While running the routers to verify a sender address, $sender_address
7600 was still set to the sender address. This is wrong, because when routing to
7601 send a bounce to the sender, it would be empty. Therefore, I have changed
7602 it so that, while verifying a sender address, $sender_address is set to <>.
7603 (There is no change to what happens when verifying a recipient address.)
7605 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7606 target A or AAAA records (if not already returned) without resetting the
7607 qualify_single or search_parents options of the DNS resolver. These are
7608 inappropriate in this case because the targets of MX and SRV records must
7609 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7610 target that, when qualified, matched something in the local domain. These
7611 two options are now turned off when doing these lookups.
7613 57. It seems that at least some releases of Reiserfs (which does not have the
7614 concept of a fixed number of inodes) returns zero and not -1 for the
7615 number of available inodes. This interacted badly with check_spool_inodes,
7616 which assumed that -1 was the "no such thing" setting. What I have done is
7617 to check that the total number of inodes is greater than zero before doing
7618 the test of how many are available.
7620 58. When a "warn" ACL statement has a log_message modifier, the message is
7621 remembered, and not repeated. This is to avoid a lot of repetition when a
7622 message has many recipients that cause the same warning to be written.
7623 However, Exim was preserving the list of already written lines for an
7624 entire SMTP session, which doesn't seem right. The memory is now reset if a
7625 new message is started.
7627 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7628 debugging output unless log_rewrite was also set.
7630 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7631 of (int)(handle) when we know that handle contains (void *)(-1).
7633 61. The Exim daemon panic-logs an error return when it closes the incoming
7634 connection. However "connection reset by peer" seems to be common, and
7635 isn't really an error worthy of noting specially, so that particular error
7638 62. When Exim is trying to find all the local interfaces, it used to panic and
7639 die if the ioctl to get the interface flags failed. However, it seems that
7640 on at least one OS (Solaris 9) it is possible to have an interface that is
7641 included in the list of interfaces, but for which you get a failure error
7642 for this call. This happens when the interface is not "plumbed" into a
7643 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7644 failure of the "get flags" call assumes that the interface is down.
7646 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7647 makes life easier for people who are doing arithmetic on fields extracted
7648 from dates, where you often get leading zeros that should not be
7649 interpreted as octal.
7651 64. Added qualify_domain to the redirect router, to override the global
7654 65. If a pathologically long header line contained very many addresses (the
7655 report of this problem mentioned 10 000) and each of them was rewritten,
7656 Exim could use up a very large amount of memory. (It kept on making new
7657 copies of the header line as it rewrote, and never released the old ones.)
7658 At the expense of a bit more processing, the header rewriting function has
7659 been changed so that it no longer eats memory in this way.
7661 66. The generation of the Received: header has been moved from the time that a
7662 message starts to be received, to the time that it finishes. The timestamp
7663 in the Received: header should now be very close to that of the <= log
7664 line. There are two side-effects of this change:
7666 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7667 logged header lines no longer include the local Received: line, because
7668 it has not yet been created. The same applies to a copy of the message
7669 that is returned to a non-SMTP sender when a message is rejected.
7671 (b) When a filter file is tested using -bf, no additional Received: header
7672 is added to the test message. After some thought, I decided that this
7675 This change does not affect the value of $received_for. It is still set
7676 after address rewriting, but before local_scan() is called.
7678 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7680 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7681 gave an unhelpful panic error message, and a defer error. I have managed to
7682 change this behaviour so that it now rejects any supplied certificate,
7683 which seems right, as the list of acceptable certificates is empty.
7685 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7686 gave an unhelpful defer error. I have not managed to make this reject any
7687 supplied certificates, but the error message it gives is "no certificate
7688 supplied", which is not helpful.
7690 70. exigrep's output now also includes lines that are not associated with any
7691 message, but which match the given pattern. Implemented by a patch from
7692 Martin Sluka, which also tidied up the Perl a bit.
7694 71. Recipient callout verification, like sender verification, was using <> in
7695 the MAIL FROM command. This isn't really the right thing, since the actual
7696 sender may affect whether the remote host accepts the recipient or not. I
7697 have changed it to use the actual sender in the callout; this means that
7698 the cache record is now keyed on a recipient/sender pair, not just the
7699 recipient address. There doesn't seem to be a real danger of callout loops,
7700 since a callout by the remote host to check the sender would use <>.
7701 [SEE ABOVE: changed after hitting problems.]
7703 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7704 temporary errors. However, in the case of such a code being given after
7705 the end of a data transmission (i.e. after ".") Exim was failing to write
7706 a retry record for the message. (Yes, there was some broken host that was
7707 actually sending 8xx at this point.)
7709 73. An unknown lookup type in a host list could cause Exim to panic-die when
7710 the list was checked. (An example that provoked this was putting <; in the
7711 middle of a list instead of at the start.) If this happened during a DATA
7712 ACL check, a -D file could be left lying around. This kind of configuration
7713 error no longer causes Exim to die; instead it causes a defer error. The
7714 incident is still logged to the main and panic logs.
7716 74. Buglet left over from Exim 3 conversion. The message "too many messages
7717 in one connection" was written to the rejectlog but not the mainlog, except
7718 when address rewriting (yes!) was being logged.
7720 75. Added write_rejectlog option.
7722 76. When a system filter was run not as root (that is, when system_filter_user
7723 was set), the values of the $n variables were not being returned to the
7724 main process; thus, they were not subsequently available in the $sn
7727 77. Added +return_path_on_delivery log selector.
7729 78. A connection timeout was being treated differently from recipients deferred
7730 when testing hosts_max_try with a message that was older than the host's
7731 retry timeout. (The host should not be counted, thus allowing all hosts to
7732 be tried at least once before bouncing.) This may have been the cause of an
7733 occasionally reported bug whereby a message would remain on the queue
7734 longer than the retry timeout, but would be bounced if a delivery was
7735 forced. I say "may" because I never totally pinned down the problem;
7736 setting up timeout/retry tests is difficult. See also the next item.
7738 79. The ultimate address timeout was not being applied to errors that involved
7739 a combination of host plus message (for example, a timeout on a MAIL
7740 command). When an address resolved to a number of possible hosts, and they
7741 were not all tried for each delivery (e.g. because of hosts_max_try), a
7742 message could remain on the queue longer than the retry timeout.
7744 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7747 81. Fixed an obscure SMTP outgoing bug which required at least the following
7748 conditions: (a) there was another message waiting for the same server;
7749 (b) the server returned 5xx to all RCPT commands in the first message so
7750 that the message was not completed; (c) the server dropped the connection
7751 or gave a negative response to the RSET that Exim sends to abort the
7752 transaction. The observed case was a dropped connection after DATA that had
7753 been sent in pipelining mode. That is, the server had advertised PIPELINING
7754 but was not implementing it correctly. The effect of the bug was incorrect
7755 behaviour, such as trying another host, and this could lead to a crash.
7761 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7762 and daemon.c were passed as pointers to ints; they should have been
7763 pointers to socklen_t variables (which are typically unsigned ints).
7765 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7768 3. Fixed a really odd bug that affected only the testing scheme; patching a
7769 certain fixed string in the binary changed the value of another string that
7770 happened to be identical to the end of the original first string.
7772 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7773 name", it returns that address as the IP address. On some operating
7774 systems (e.g. Solaris), it also passes back the IP address string as the
7775 "host name". However, on others (e.g. Linux), it passes back an empty
7776 string. Exim wasn't checking for this, and was changing the host name to an
7777 empty string, assuming it had been canonicalized.
7779 5. Although rare, it is permitted to have more than one PTR record for a given
7780 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7781 all the names associated with an address, because they do in Solaris.
7782 However, it seems that they do not in Linux for data that comes from the
7783 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7784 I found this out when I moved to a new Linux workstation and tried to run
7785 the Exim test suite.
7787 To get round this problem I have changed the code so that it now does its
7788 own call to the DNS to look up PTR records when searching for a host name.
7789 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7790 addresses that are only in /etc/hosts are still found.
7792 This behaviour is, however, controlled by an option called host_lookup_
7793 order, which defaults to "bydns:byaddr". If people want to use the other
7794 order, or indeed, just use one or the other means of lookup, they can
7795 specify it in this variable.
7797 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7798 some operating systems, this comes back from gethostbyaddr() as an empty
7799 string, and this is what Exim used to test for. However, it seems that in
7800 other systems, "." is yielded. Exim now tests for this case too.
7802 7. The values of check_spool_space and check_log_space are now held internally
7803 as a number of kilobytes instead of an absolute number of bytes. If a
7804 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7805 kilobyte. This means that much larger values can be stored.
7807 8. Exim monitor: an attempt to get the action menu when not actually pointing
7808 at a message produces an empty menu entitled "No message selected". This
7809 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7810 no entries in it ("Shell widget menu has zero width and/or height"). So I
7811 have added a single, blank menu entry in this case.
7813 9. Added ${quote_local_part.
7815 10. MIME decoding is now applied to the contents of Subject: header lines when
7818 11. Now that a reference to $sender_host_address automatically causes a reverse
7819 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7820 host lookup before query-style lookups in lists that might use this
7821 variable. This has therefore been abolished, and the "net-" prefix is no
7822 longer necessary for query-style lookups.
7824 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7825 have been a typo for LFLAGS, so it has been changed.
7827 13. The install script calls Exim with "-C /dev/null" in order to find the
7828 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7829 to be output. However, since Exim outputs its version number before the
7830 error, it didn't break the script. It just looked ugly. I fixed this by
7831 always allowing "-C /dev/null" if the caller is root.
7833 14. Ignore overlarge ACL variable number when reading spool file - insurance
7834 against a later release with more variables having written the file.
7836 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7837 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7838 this, as well as the form without the "IPv6" on the front.
7840 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7841 OS/Makefile-Darwin file.
7843 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7844 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7846 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7847 variable. However, some OS use ints for inodes. I've added cast to long int
7848 to get rid of the compiler warning.
7850 19. I had forgotten to lock out "/../" in configuration file names when
7851 ALT_CONFIG_PREFIX was set.
7853 20. Routers used for verification do not need to specify transports. However,
7854 if such a router generated a host list, and callout was configured, Exim
7855 crashed, because it could not find a port number from the (non-existent)
7856 transport. It now assumes port 25 in this circumstance.
7858 21. Added the -t option to exigrep.
7860 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7861 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7862 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7863 them is set, LOOKUP_LSEARCH is forced.
7865 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7867 24. Added sender and host information to the "rejected by local_scan()" log
7868 line; previously there was no indication of these.
7870 25. Added .include_if_exists.
7872 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7873 Linux. It turns out that not all file systems support this. Apparently some
7874 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7875 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7876 not supported on the file descriptor, is now ignored when Exim is trying to
7877 sync a directory. This applies only to Linux.
7879 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7881 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7882 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7885 29. Added support for maildirsize files from supplied patch (modified a bit).
7887 30. The use of :fail: followed by an empty string could lead Exim to respond to
7888 sender verification failures with (e.g.):
7890 550 Verification failed for <xxx>
7891 550 Sender verify failed
7893 where the first response line was missing the '-' that indicates it is not
7894 the final line of the response.
7896 31. The loop for finding the name of the user that called Exim had a hardwired
7897 limit of 10; it now uses the value of finduser_retries, which is used for
7898 all other user lookups.
7900 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7903 33. Exim was neglecting to zero errno before one call of strtol() when
7904 expanding a string and expecting an integer value. On some systems this
7905 resulted in spurious "integer overflow" errors. Also, it was casting the
7906 result into an int without checking.
7908 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7909 did not work. The code looks as if it has *never* worked, though it appears
7910 to have been documented since at least release 1.62. I have made it work.
7912 35. The "timeout_DNS" error in retry rules, also documented since at least
7913 1.62, also never worked. As it isn't clear exactly what this means, and
7914 clearly it isn't a major issue, I have abolished the feature by treating it
7915 as "timeout", and writing a warning to the main and panic logs.
7917 36. The display of retry rules for -brt wasn't always showing the error code
7920 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7921 timeout_connect_A, timeout_connect_MX.
7923 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7924 to the empty sender.
7926 39. The daemon was not analysing the content of -oX till after it had closed
7927 stderr and disconnected from the controlling terminal. This meant that any
7928 syntax errors were only noted on the panic log, and the return code from
7929 the command was 0. By re-arranging the code a little, I've made the
7930 decoding happen first, so such errors now appear on stderr, and the return
7931 code is 1. However, the actual setting up of the sockets still happens in
7932 the disconnected process, so errors there are still only recorded on the
7935 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7936 connections (as happens on some IP stacks) was logged at start up time as
7937 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7938 it from "IPv6 and IPv4", which means that two separate sockets are being
7941 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7942 says whether AF_INET or AF_INET6 was passed as an argument.
7944 42. Exiwhat output was messed up when time zones were included in log
7947 43. Exiwhat now gives more information about the daemon's listening ports,
7948 and whether -tls-on-connect was used.
7950 44. The "port" option of the smtp transport is now expanded.
7952 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7953 silently ignored. Now an error message is written to the main and panic
7956 46. There's a new ACL modifier called "logwrite" which writes to a log file
7957 as soon as it is encountered.
7959 47. Added $local_user_uid and $local_user_gid at routing time.
7961 48. Exim crashed when trying to verify a sender address that was being
7964 49. Exim was recognizing only a space character after ".include". It now also
7965 recognizes a tab character.
7967 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7968 extracting the relevant information from the specification. The man page no
7969 longer contains scrambled data for the -d option, and I've added a section
7970 at the front about calling Exim under different names.
7972 51. Added "extra_headers" argument to the "mail" command in filter files.
7974 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7977 53. Installed eximstats 1.29.
7979 54. Added transport_filter_timeout as a generic transport option.
7981 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7982 Cc: header lines. This was required by RFC 822, but it not required by RFC
7985 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7986 incoming messages that did not have them. Now it does so only if the
7987 message originates locally, that is, if there is no associated remote host
7988 address. When Resent- header lines are present, this applies to the Resent-
7989 lines rather than the non-Resent- lines.
7991 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7992 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7994 58. Messages for configuration errors now include the name of the main
7995 configuration file - useful now that there may be more than one file in a
7996 list (.included file names were always shown).
7998 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7999 for those rare installations that do not start the daemon as root or run it
8000 setuid root. I've cut out the call to initgroups() if the daemon is not
8003 60. The Exim user and group can now be bound into the binary as text strings
8004 that are looked up at the start of Exim's processing.
8006 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
8008 62. Added $mailstore_basename variable.
8010 63. Installed patch to sieve.c from Michael Haardt.
8012 64. When Exim failed to open the panic log after failing to open the main log,
8013 the original message it was trying to log was written to stderr and debug
8014 output, but if they were not available (the usual case in production), it
8015 was lost. Now it is written to syslog before the two lines that record the
8016 failures to open the logs.
8018 65. Users' Exim filters run in subprocesses under the user's uid. It is
8019 possible for a "deliver" command or an alias in a "personal" command to
8020 provoke an address rewrite. If logging of address rewriting is configured,
8021 this fails because the process is not running as root or exim. There may be
8022 a better way of dealing with this, but for the moment (because 4.30 needs
8023 to be released), I have disabled address rewrite logging when running a
8024 filter in a non-root, non-exim process.
8030 1. The buildconfig auxiliary program wasn't quoting the value set for
8031 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8032 not defined. This bug was masked in 4.22 by the effect that was fixed in
8035 2. Some messages that were rejected after a message id was allocated were
8036 shown as "incomplete" by exigrep. It no longer does this for messages that
8037 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8039 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8040 have allow_domain_literals set, the ID did not get logged in the <= line.
8041 Domain literals are now always recognized in Message-ID: header lines.
8043 4. The first argument for a ${extract expansion item is the key name or field
8044 number. Leading and trailing spaces in this item were not being ignored,
8045 causing some misleading effects.
8047 5. When deliver_drop_privilege was set, single queue runner processes started
8048 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8049 same command in the process it spins off) were not dropping privilege.
8051 6. When the daemon running as "exim" started a queue runner, it always
8052 re-executed Exim in the spun-off process. This is a waste of effort when
8053 deliver_drop_privilege is set. The new process now just calls the
8054 queue-runner function directly.
8060 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8063 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8064 ignored. Though the use of -oP was forcing the writing of a pid file, it
8065 was always written to the default place.
8067 3. If the message "no IP address found for host xxxx" is generated during
8068 incoming verification, it is now followed by identification of the incoming
8069 connection (so you can more easily find what provoked it).
8071 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8073 5. Added some features to "harden" Exim a bit more against certain attacks:
8075 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8076 be put in Local/Makefile. This is like the never_users runtime option,
8077 but it cannot be overridden. The default setting is "root".
8079 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8080 prefix string with which any file named in a -C command line option
8083 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8084 is retained for -C and -D only if the caller of Exim is root. Without
8085 it, the exim user may also use -C and -D and retain privilege.
8087 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8088 command line option is disabled.
8090 6. Macro names set by the -D option must start with an upper case letter, just
8091 like macro names defined in the configuration file.
8093 7. Added "dereference=" facility to LDAP.
8095 8. Two instances of the typo "uknown" in the source files are fixed.
8097 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8098 the Configure-Makefile script screwed up while processing it.
8100 10. Incorporated PCRE 4.4.
8102 11. The SMTP synchronization check was not operating right at the start of an
8103 SMTP session. For example, it could not catch a HELO sent before the client
8104 waited for the greeting. There is now a check for outstanding input at the
8105 point when the greeting is written. Because of the duplex, asynchronous
8106 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8107 way, but not yet received, when the check is performed.
8109 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8110 on TCP/IP sockets, because this apparently causes some broken clients to
8113 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8114 unchanged) from the Cygwin maintainer.
8116 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8117 was supported instead of testing for mbx. Effectively a typo.
8119 15. The spa authenticator server code was not checking that the input it
8120 received was valid base64.
8122 16. The debug output line for the "set" modifier in ACLs was not showing the
8123 name of the variable that was being set.
8125 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8127 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8128 lookup on its own. Something else was needed to trigger the lookup. For
8129 example, a match in host_lookup or the need for a host name in a host list.
8130 Now, if $sender_host_name is referenced and the host name has not yet been
8131 looked up, a lookup is performed. If the lookup fails, the variable remains
8132 empty, and $host_lookup_failed is set to "1".
8134 19. Added "eqi" as a case-independent comparison operator.
8136 20. The saslauthd authentication condition could segfault if neither service
8137 nor realm was specified.
8139 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8140 error message that was logged was misleading, and incoming SMTP
8141 connections were dropped. The message is now more accurate, and temporary
8142 errors are given to SMTP connections.
8144 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8145 (except RSET) with a 421 error, until QUIT is received. However, it was
8146 failing to send a response to QUIT.
8148 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8149 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8150 ACL is now run after the helo_try_verify_hosts code.
8152 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8153 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8154 case-independent, so other case variants are also recognized). Apparently
8155 some systems use these upper case variants.
8157 25. If more than two messages were waiting for the same host, and a transport
8158 filter was specified for the transport, Exim sent two messages over the
8159 same TCP/IP connection, and then failed with "socket operation on non-
8160 socket" when it tried to send the third.
8162 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8164 27. The extern definition of crypt16() in expand.c was not being excluded when
8165 the OS had its own crypt16() function.
8167 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8168 as a preferred synonym for return_size_limit, both as an option and as an
8171 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8173 30. Changed the default configuration ACL to relax the local part checking rule
8174 for addresses that are not in any local domains. For these addresses,
8175 slashes and pipe symbols are allowed within local parts, but the sequence
8176 /../ is explicitly forbidden.
8178 31. SPA server authentication was not clearing the challenge buffer before
8181 32. log_message in a "warn" ACL statement was writing to the reject log as
8182 well as to the main log, which contradicts the documentation and doesn't
8183 seem right (because no rejection is happening). So I have stopped it.
8185 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8186 However, I am unable to do any testing of this.
8188 34. Fixed an infelicity in the appendfile transport. When checking directories
8189 for a mailbox, to see if any needed to be created, it was accidentally
8190 using path names with one or more superfluous leading slashes; tracing
8191 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8193 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8194 contents are added to the log line that is written for every discarded
8195 recipient. (Previously a log_message setting was ignored.)
8197 36. The ${quote: operator now quotes the string if it is empty.
8199 37. The install script runs exim in order to find its version number. If for
8200 some reason other than non-existence or emptiness, which it checks, it
8201 could not run './exim', it was installing it with an empty version number,
8202 i.e. as "exim-". This error state is now caught, and the installation is
8205 38. An argument was missing from the function that creates an error message
8206 when Exim fails to connect to the socket for saslauthd authentication.
8207 This could cause Exim to crash, or give a corrupted message.
8209 39. Added isip, isip4, and isip6 to ${if conditions.
8211 40. The ACL variables $acl_xx are now saved with the message, and can be
8212 accessed later in routers, transports, and filters.
8214 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8215 strings in the file are not string-expanded.
8217 42. If a MAIL command specified a SIZE value that was too large to fit into an
8218 int variable, the check against message_size_limit failed. Such values are
8219 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8220 day this will have to be increased, but I don't think I want to be around
8221 when emails are that large.
8228 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8229 iconv() is not standard in FreeBSD.
8231 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8232 IPv6 enabled. The observed symptom was a segmentation fault on return from
8233 the function os_common_find_running_interfaces() in src/os.c.
8235 3. In the check_special_case() function in daemon.c I had used "errno" as an
8236 argument name, which causes warnings on some systems. This was basically a
8237 typo, since it was named "eno" in the comments!
8239 4. The code that waits for the clock to tick (at a resolution of some fraction
8240 of a second) so as to ensure message-id uniqueness was always waiting for
8241 at least one whole tick, when it could have waited for less. [This is
8242 almost certainly not relevant at current processor speeds, where it is
8243 unlikely to ever wait at all. But we try to future-proof.]
8245 5. The function that sleeps for a time interval that includes fractions of a
8246 second contained a race. It did not block SIGALRM between setting the
8247 timer, and suspending (a couple of lines later). If the interval was short
8248 and the sigsuspend() was delayed until after it had expired, the suspension
8249 never ended. On busy systems this could lead to processes getting stuck for
8252 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8253 process, before it forks any delivery processes. The open lookup caching
8254 mechanism meant that the open file or database connection was passed into
8255 the delivery process. The problem was that delivery processes always tidy
8256 up cached lookup data. This could cause a problem for the next delivery
8257 process started by the queue runner, because the external queue runner
8258 process does not know about the closure. So the next delivery process
8259 still has data in the lookup cache. In the case of a file lookup, there was
8260 no problem because closing a file descriptor in a subprocess doesn't affect
8261 the parent. However, if the lookup was caching a connection to a database,
8262 the connection was closed, and the second delivery process was likely to
8263 see errors such as "PGSQL: query failed: server closed the connection
8264 unexpectedly". The problem has been fixed by closing all cached lookups
8265 in a queue runner before running a delivery process.
8267 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8268 seem to have the "const" qualifier which it has on other OS. I've
8271 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8272 *of the same type* (client or server) with the same public name that an
8273 error should be diagnosed.
8275 9. When Exim looked up a host name for an IP address, but failed to find the
8276 original IP address when looking up the host name (a safety check), it
8277 output the message "<ip address> does not match any IP for NULL", which was
8278 confusing, to say the least. The bug was that the host name should have
8279 appeared instead of "NULL".
8281 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8282 user that is built into the binary, and the -C or -D options is used, root
8283 privilege is dropped before the configuration file is read. In addition,
8284 logging is switched to stderr instead of the normal log files. If the
8285 configuration then re-defines the Exim user, the unprivileged environment
8286 is probably not what is expected, so Exim logs a panic warning message (but
8289 However, if deliver_drop_privilege is set, the unprivileged state may well
8290 be exactly what is intended, so the warning has been cut out in that case,
8291 and Exim is allowed to try to write to its normal log files.
8297 1. smtp_return_error_details was not giving details for temporary sender
8298 or receiver verification errors.
8300 2. Diagnose a configuration error if two authenticators have the same public
8303 3. Exim used not to create the message log file for a message until the first
8304 delivery attempt. This could be confusing when incoming messages were held
8305 for policy or load reasons. The message log file is now created at the time
8306 the message is received, and an initial "Received" line is written to it.
8308 4. The automatically generated man page for command line options had a minor
8309 bug that caused no ill effects; however, a more serious problem was that
8310 the procedure for building the man page automatically didn't always
8311 operate. Consequently, release 4.20 contains an out-of-date version. This
8312 shouldn't happen again.
8314 5. When building Exim with embedded Perl support, the script that builds the
8315 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8316 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8318 6. The freeze_tell option was not being used for messages that were frozen on
8319 arrival, either by an ACL or by local_scan().
8321 7. Added the smtp_incomplete_transaction log selector.
8323 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8324 was accepting AUTH without a new EHLO.
8326 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8327 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8330 10. Logging of TCP/IP connections (when configured) now happens in the main
8331 daemon process instead of the child process, so that the TCP/IP connection
8332 count is more accurate (but it can never be perfect).
8334 11. The use of "drop" in a nested ACL was not being handled correctly in the
8335 outer ACL. Now, if condition failure induced by the nested "drop" causes
8336 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8337 or "require"), the connection is dropped.
8339 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8340 that yield "discard" can now be used with an "accept" or a "discard" verb,
8341 but an error is generated for any others (because I can't see a useful way
8342 to define what should happen).
8344 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8345 are now processed in the same way as lines in the Exim configuration file.
8346 In particular, continuation lines are supported.
8348 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8350 15. Added -ti meaning -t -i.
8352 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8353 domains, and warn by logging if others are found.
8355 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8356 returned from GIFCONF when Exim is trying to find the list of interfaces on
8357 a host. The code in os.c has been modified to copy each ifreq to an aligned
8358 structure in all cases.
8360 Also, in some cases, the returned ifreq's were being copied to a 'struct
8361 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8362 means the last couple of bytes of an IPv6 address could be chopped if the
8363 ifreq contained only a normal sockaddr (14 bytes storage).
8365 18. Named domain lists were not supported in the hosts_treat_as_local option.
8366 An entry such as +xxxx was not recognized, and was treated as a literal
8369 19. Ensure that header lines added by a DATA ACL are included in the reject log
8370 if the ACL subsequently rejects the message.
8372 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8373 MD5 (which is deprecated).
8375 21. When testing a filter file using -bf, Exim was writing a message when it
8376 took the sender from a "From " line in the message, but it was not doing so
8377 when it took $return_path from a Return-Path: header line. It now does.
8379 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8380 with a valid header line field name (a series of printing characters
8381 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8383 23. Changed "disc" in the source to "disk" to conform to the documentation and
8384 the book and for uniformity.
8386 24. Ignore Sendmail's -Ooption=value command line item.
8388 25. When execve() failed while trying to run a command in a pipe transport,
8389 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8390 could be confused with a return value of 69 from the command itself. This
8391 has been changed to 127, the value the shell returns if it is asked to run
8392 a non-existent command. The wording for the related log line suggests a
8393 non-existent command as the problem.
8395 26. If received_header_text expands to an empty string, do not add a Received:
8396 header line to the message. (Well, it adds a token one on the spool, but
8397 marks it "old" so that it doesn't get used or transmitted.)
8399 27. Installed eximstats 1.28 (addition of -nt option).
8401 28. There was no check for failure on the call to getsockname() in the daemon
8402 code. This can fail if there is a shortage of resources on the system, with
8403 ENOMEM, for example. A temporary error is now given on failure.
8405 29. Contrary to the C standard, it seems that in some environments, the
8406 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8407 program. Exim now does this explicitly; it affects the formatting of
8408 timestamps using strftime().
8410 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8411 complaints. I've now initialized all the variables, to avoid this.
8413 32. Header lines added by a system filter were not being "seen" during
8414 transport-time rewrites.
8416 33. The info_callback() function passed to OpenSSL is set up with type void
8417 (*)(SSL *, int, int), as described somewhere. However, when calling the
8418 function (actually a macro) that sets it up, the type void(*)() is
8419 expected. I've put in a cast to prevent warnings from picky compilers.
8421 34. If a DNS black list lookup found a CNAME record, but there were no A
8422 records associated with the domain it pointed at, Exim crashed.
8424 35. If a DNS black list lookup returned more than one A record, Exim ignored
8425 all but the first. It now scans all returned addresses if a particular IP
8426 value is being sought. In this situation, the contents of the
8427 $dnslist_value variable are a list of all the addresses, separated by a
8430 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8431 to accept a host name and all its aliases if the forward lookup for any of
8432 them yielded the IP address of the incoming connection. Now it accepts only
8433 those names whose forward lookup yields the correct IP address. Any other
8434 names are discarded. This closes a loophole whereby a rogue DNS
8435 administrator could create reverse DNS records to break through a
8436 wildcarded host restriction in an ACL.
8438 37. If a user filter or a system filter that ran in a subprocess used any of
8439 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8440 the wrong values were passed to the pipe command ($thisaddress had the
8441 value of $0, $0 had the value of $1, etc). This bug was introduced by
8442 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8444 38. Improved the line breaking for long SMTP error messages from ACLs.
8445 Previously, if there was no break point between 40 and 75 characters, Exim
8446 left the rest of the message alone. Two changes have been made: (a) I've
8447 reduced the minimum length to 35 characters; (b) if it can't find a break
8448 point between 35 and 75 characters, it looks ahead and uses the first one
8449 that it finds. This may give the occasional overlong line, but at least the
8450 remaining text gets split now.
8452 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8453 file descriptors might be low, and that setting 1000 would always raise it.
8454 It turns out that in some environments, the limit is already over 1000 and
8455 that lowering it causes trouble. So now Exim takes care not to decrease it.
8457 40. When delivering a message, the value of $return_path is set to $sender_
8458 address at the start of routing (routers may change the value). By an
8459 oversight, this default was not being set up when an address was tested by
8460 -bt or -bv, which affected the outcome if any router or filter referred to
8463 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8464 log only when "message" or "log_message" are set. However, if one of the
8465 conditions was an address verification, or a call to a nested ACL, the
8466 messages generated by the underlying test were being passed through. This
8467 no longer happens. The underlying message is available in $acl_verify_
8468 message for both "message" and "log_message" expansions, so it can be
8469 passed through if needed.
8471 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8472 new expansion $bh_ to give the encoded byte string without charset
8473 translation. Translation happens only if iconv() is available; HAVE_ICONV
8474 indicates this at build time. HEADERS_CHARSET gives the charset to
8475 translate to; headers_charset can change it in the configuration, and
8476 "headers charset" can change it in an individual filter file.
8478 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8479 that creates RFC 2047 encoded "words" labels them as that charset instead
8480 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8481 expansion operator; (ii) when Exim creates a From: line for a local
8482 message; (iii) when a header line is rewritten to include a "phrase" part.
8484 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8485 buggy, causing it to skip the first lines of messages whose message ID
8486 ended in 'D'. This would not have bitten before Exim release 4.14, because
8487 message IDs were unlikely to end in 'D' before then. The effect was to have
8488 incorrect size information for certain domains.
8490 45. #include "config.h" was missing at the start of the crypt16.c module. This
8491 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8494 46. If there was a timeout during a "random" callout check, Exim treated it as
8495 a failure of the random address, and carried on sending RSET and the real
8496 address. If the delay was just some slowness somewhere, the response to the
8497 original RCPT would be taken as a response to RSET and so on, causing
8498 mayhem of various kinds.
8500 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8501 when I implemented it. It didn't allow for the fact that some option values
8502 may legitimately be negative (e.g. size_addition), and it didn't even do
8503 the right test for positive values.
8505 48. Domain names in DNS records are case-independent. Exim always looks them up
8506 in lower case. Some resolvers return domain names in exactly the case they
8507 appear in the zone file, that is, they may contain uppercase letters. Not
8508 all resolvers do this - some return always lower case. Exim was treating a
8509 change of case by a resolver as a change of domain, similar to a widening
8510 of a domain abbreviation. This triggered its re-routing code and so it was
8511 trying to route what was effectively the same domain again. This normally
8512 caused routing to fail (because the router wouldn't handle the domain
8513 twice). Now Exim checks for this case specially, and just changes the
8514 casing of the domain that it ultimately uses when it transmits the message
8517 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8520 50. If a filter generated a file delivery with a non-absolute name (possible if
8521 no home directory exists for the router), the forbid_file option was not
8524 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8525 the existing equality matching.
8527 52. Exim was using ints instead of ino_t variables in some places where it was
8528 dealing with inode numbers.
8530 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8531 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8532 called TMPDIR, and if it finds it is different, it changes its value.
8534 54. The smtp_printf() function is now made available to local_scan() so
8535 additional output lines can be written before returning. There is also an
8536 smtp_fflush() function to enable the detection of a dropped connection.
8537 The variables smtp_input and smtp_batched_input are exported to
8540 55. Changed the default runtime configuration: the message "Unknown user"
8541 has been removed from the ACL, and instead placed on the localuser router,
8542 using the cannot_route_message feature. This means that any verification
8543 failures that generate their own messages won't get overridden. Similarly,
8544 the "Unrouteable address" message that was in the ACL for unverifiable
8545 relay addresses has also been removed.
8547 56. Added hosts_avoid_esmtp to the smtp transport.
8549 57. The exicyclog script was not checking for the esoteric option
8550 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8551 will work only if exicyclog is run under the appropriate euid.
8553 58. Following a discussion on the list, the rules by which Exim recognises line
8554 endings on incoming messages have been changed. The -dropcr and drop_cr
8555 options are now no-ops, retained only for backwards compatibility. The
8556 following line terminators are recognized: LF CRLF CR. However, special
8557 processing applies to CR:
8559 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8560 nor a local message in the state where . is a terminator.
8562 (ii) If a bare CR is encountered in a header line, an extra space is added
8563 after the line terminator so as not to end the header. The reasoning
8564 behind this is that bare CRs in header lines are most likely either
8565 to be mistakes, or people trying to play silly games.
8567 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8568 was being incorrectly given as 18 bytes larger than it should have been.
8569 This is a VOB (very old bug).
8571 60. This may never have affected anything current, but just in case it has:
8572 When the local host is found other than at the start of a list of hosts,
8573 the local host, those with the same MX, and any that follow, are discarded.
8574 When the list in question was part of a longer list of hosts, the following
8575 hosts (not currently being processed) were also being discarded. This no
8576 longer happens. I'm not sure if this situation could ever has previously
8579 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8582 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8583 header. This is something that is recommended in a new Internet Draft, and
8584 is something that is documented as being done by Sendmail. There are two
8585 possible values. For messages generated by the autoreply transport, Exim
8588 Auto-Submitted: auto-replied
8590 whereas for all other generated messages (e.g. bounces) it adds
8592 Auto-Submitted: auto-generated
8594 63. The "personal" condition in filters now includes a test for the
8595 Auto-Submitted: header. If it contains the string "auto-" the message it
8596 not considered personal.
8598 64. Added rcpt_include_affixes as a generic transport option.
8600 65. Added queue_only_override (default true).
8602 66. Added the syslog_duplication option.
8604 67. If what should have been the first header line of a message consisted of
8605 a space followed by a colon, Exim was mis-interpreting it as a header line.
8606 It isn't of course - it is syntactically invalid and should therefore be
8607 treated as the start of the message body. The misbehaviour could have
8608 caused a number of strange effects, including loss of data in subsequent
8609 header lines, and spool format errors.
8611 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8612 client host had authenticated. This control can now be exercised by an ACL
8613 for more flexibility.
8615 69. By default, callouts do not happen when testing with -bh. There is now a
8616 variant, -bhc, which does actually run the callout code, including
8617 consulting and updating the callout cache.
8619 70. Added support for saslauthd authentication, courtesy of Alexander
8622 71. If statvfs() failed on the spool or log directories while checking their
8623 size for availability, Exim confusingly gave the error "space shortage".
8624 Furthermore, in debugging mode it crashed with a floating point exception.
8625 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8626 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8627 serious problem, Exim now writes to the main and panic logs when this
8628 happens, with details of the failure. It then refuses to accept the
8629 incoming message, giving the message "spool directory problem" or "log
8630 directory problem" with a 421 code for SMTP messages.
8632 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8633 0, 1, and 2 exist, because some OS complain for execs without them (see
8634 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8635 descriptors. However, the code omitted to check that the open succeeded,
8636 causing mysterious errors if for some reason the permissions on /dev/null
8637 got screwed. Now Exim writes a message to the main and panic logs, and
8638 bombs out if it can't open /dev/null.
8640 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8641 interact so that it is all more flexible. It is supposed to remain
8642 backwards compatible. Also added extra_local_interfaces.
8644 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8645 to bomb out with an assertion failure - to the client this appears as a
8646 connection drop. This problem occurs in the part of the code that was taken
8647 from the Samba project. Fortunately, the assertion is in a very simple
8648 function, so I have fixed this by reproducing the function inline in the
8649 one place where it is called, and arranging for authentication to fail
8650 instead of killing the process with assert().
8652 75. The SPA client code was not working when the server requested OEM rather
8653 than Unicode encoding.
8655 76. Added code to make require_files with a specific uid setting more usable in
8656 the case where statting the file as root fails - usually a non-root-mounted
8657 NFS file system. When this happens and the failure is EACCES, Exim now
8658 forks a subprocess and does the per-uid checking as the relevant uid.
8660 77. Added process_log_path.
8662 78. If log_file_path was not explicitly set, a setting of check_log_space or
8663 check_log_inodes was ignored.
8665 79. If a space check for the spool or log partitions fails, the incident is now
8666 logged. Of course, in the latter case the data may get lost...
8668 80. Added the %p formatting code to string_format() so that it can be used to
8669 print addresses in debug_print(). Adjusted all the address printing in the
8670 debugging in store.c to use %p rather than %d.
8672 81. There was a concern that a line of code in smtp_in.c could overflow a
8673 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8674 initially expressed, the concern was not well-founded, because trailing
8675 spaces are removed early. However, if the trailing spaces were followed by
8676 a NULL, they did not get removed, so the overflow was possible. Two fixes
8679 (a) I re-wrote the offending code in a cleaner fashion.
8680 (b) If an incoming SMTP command contains a NULL character, it is rejected
8683 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8684 runs initgroups(), so that if the Exim user is in any additional groups,
8685 they will be used during message reception.
8691 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob