1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Handle short writes when writing local log-files.
8 In practice, only affects FreeBSD (8 onwards).
9 Bugzilla 1053, with thanks to Dmitry Isaikin.
15 PP/01 Solaris build fix for Oracle's LDAP libraries.
16 Bugzilla 1109, patch from Stephen Usher.
18 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
20 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
23 TF/02 Fix a couple more cases where we did not log the error message
24 when unlink() failed. See also change 4.74-TF/03.
26 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
27 lock up or crash if it happened to be inside a call to libc when it
28 got a SIGUSR1 from exiwhat.
30 The SIGUSR1 handler appends the current process status to the process
31 log which is later printed by exiwhat. It used to use the general
32 purpose logging code to do this, but several functions it calls are
35 The new output code in the SIGUSR1 handler is specific to the process
36 log, and simple enough that it's easy to inspect for signal safety.
37 Removing some special cases also simplifies the general logging code.
38 Removing the spurious timestamps from the process log simplifies
41 TF/04 Improved ratelimit ACL condition.
43 The /noupdate option has been deprecated in favour of /readonly which
44 has clearer semantics. The /leaky, /strict, and /readonly update modes
45 are mutually exclusive. The update mode is no longer included in the
46 database key; it just determines when the database is updated. (This
47 means that when you upgrde Exim will forget old rate measurements.)
49 Exim now checks that the per_* options are used with an update mode that
50 makes sense for the current ACL. For example, when Exim is processing a
51 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
52 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
53 must specify per_mail/readonly. If you omit the update mode it defaults to
54 /leaky where that makes sense (as before) or /readonly where required.
56 The /noupdate option is now undocumented but still supported for
57 backwards compatibility. It is equivalent to /readonly except that in
58 ACLs where /readonly is required you may specify /leaky/noupdate or
59 /strict/noupdate which are treated the same as /readonly.
61 A useful new feature is the /count= option. This is a generalization
62 of the per_byte option, so that you can measure the throughput of other
63 aggregate values. For example, the per_byte option is now equivalent
64 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
66 The per_rcpt option has been generalized using the /count= mechanism
67 (though it's more complicated than the per_byte equivalence). When it is
68 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
69 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
70 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
71 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
72 Note that using per_rcpt with a non-readonly update mode in more than
73 one ACL will cause the recipients to be double-counted. (The per_mail
74 and per_byte options don't have this problem.)
76 The handling of very low rates has changed slightly. If the computed rate
77 is less than the event's count (usually one) then this event is the first
78 after a long gap. In this case the rate is set to the same as this event's
79 count, so that the first message of a spam run is counted properly.
81 The major new feature is a mechanism for counting the rate of unique
82 events. The new per_addr option counts the number of different
83 recipients that someone has sent messages to in the last time period. It
84 behaves like per_rcpt if all the recipient addresses are different, but
85 duplicate recipient addresses do not increase the measured rate. Like
86 the /count= option this is a general mechanism, so the per_addr option
87 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
88 example, measure the rate that a client uses different sender addresses
89 with the options per_mail/unique=$sender_address. There are further
90 details in the main documentation.
92 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
94 TF/06 Removed a few PCRE remnants.
96 TF/07 Automatically extract Exim's version number from tags in the git
97 repository when doing development or release builds.
99 PP/02 Raise smtp_cmd_buffer_size to 16kB.
100 Bugzilla 879. Patch from Paul Fisher.
102 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
103 Heavily based on revision 40f9a89a from Simon Arlott's tree.
106 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
108 PP/05 Variable $av_failed, true if the AV scanner deferred.
109 Bugzilla 1078. Patch from John Horne.
111 PP/06 Stop make process more reliably on build failure.
112 Bugzilla 1087. Patch from Heiko Schlittermann.
114 PP/07 Make maildir_use_size_file an _expandable_ boolean.
115 Bugzilla 1089. Patch from Heiko Schlittermann.
117 PP/08 Handle ${run} returning more data than OS pipe buffer size.
118 Bugzilla 1131. Patch from Holger Weiß.
120 PP/09 Handle IPv6 addresses with SPF.
121 Bugzilla 860. Patch from Wolfgang Breyha.
123 PP/10 GnuTLS: support TLS 1.2 & 1.1.
125 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
128 PP/11 match_* no longer expand right-hand-side by default.
129 New compile-time build option, EXPAND_LISTMATCH_RHS.
130 New expansion conditions, "inlist", "inlisti".
132 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
134 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
136 PP/14 fix log_write() format string regression from TF/03.
137 Bugzilla 1152. Patch from Dmitry Isaikin.
143 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
145 PP/02 Harmonised TLS library version reporting; only show if debugging.
146 Layout now matches that introduced for other libraries in 4.74 PP/03.
148 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
150 PP/04 New "dns_use_edns0" global option.
152 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
155 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
156 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
158 TK/01 Updated PolarSSL code to 0.14.2.
159 Bugzilla 1097. Patch from Andreas Metzler.
161 PP/07 Catch divide-by-zero in ${eval:...}.
164 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
167 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
168 format-string attack -- SECURITY: remote arbitrary code execution.
170 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
171 time unintentionally subject to list matching rules, letting the header
172 cause arbitrary Exim lookups (of items which can occur in lists, *not*
173 arbitrary string expansion). This allowed for information disclosure.
175 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
176 INT_MIN/-1 -- value coerced to INT_MAX.
182 NM/01 Workround for PCRE version dependency in version reporting
185 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
186 This fixes portability to compilers other than gcc, notably
187 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
189 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
190 makefiles for portability to HP-UX and POSIX correctness.
192 PP/01 Permit LOOKUP_foo enabling on the make command-line.
193 Also via indented variable definition in the Makefile.
194 (Debugging by Oliver Heesakkers).
196 PP/02 Restore caching of spamd results with expanded spamd_address.
197 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
199 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
200 Improves build reliability. Fix from: Frank Elsner
202 NM/02 Fix wide character breakage in the rfc2047 coding
203 Fixes bug 1064. Patch from Andrey N. Oktyabrski
205 NM/03 Allow underscore in dnslist lookups
206 Fixes bug 1026. Patch from Graeme Fowler
208 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
209 Code patches from Adam Ciarcinski of NetBSD.
211 NM/04 Fixed exiqgrep to cope with mailq missing size issue
214 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
215 is logged, to avoid truncation. Patch from John Horne.
217 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
218 Patch from Jakob Hirsch.
220 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
221 SQL string expansion failure details.
222 Patch from Andrey Oktyabrski.
224 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
225 Patch from Simon Arlott.
227 PP/09 New lookups functionality failed to compile on old gcc which rejects
228 extern declarations in function scope.
229 Patch from Oliver Fleischmann
231 PP/10 Use sig_atomic_t for flags set from signal handlers.
232 Check getgroups() return and improve debugging.
233 Fixed developed for diagnosis in bug 927 (which turned out to be
236 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
237 Patch from Mark Zealey.
239 PP/12 Bugzilla 1056: Improved spamd server selection.
240 Patch from Mark Zealey.
242 PP/13 Bugzilla 1086: Deal with maildir quota file races.
243 Based on patch from Heiko Schlittermann.
245 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
246 Patch from Uwe Doering, sign-off by Michael Haardt.
248 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
249 variable declaration deep within a block. Bug and patch from
252 PP/15 lookups-Makefile IRIX compatibilty coercion.
254 PP/16 Make DISABLE_DKIM build knob functional.
256 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
257 Patch by Simon Arlott
259 TF/03 Fix valgrind.h portability to C89 compilers that do not support
260 variable argument macros. Our copy now differs from upstream.
266 TF/01 Failure to get a lock on a hints database can have serious
267 consequences so log it to the panic log.
269 TF/02 Log LMTP confirmation messages in the same way as SMTP,
270 controlled using the smtp_confirmation log selector.
272 TF/03 Include the error message when we fail to unlink a spool file.
274 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
275 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
276 for maintaining out-of-tree patches for some time.
278 PP/01 Bugzilla 139: Documentation and portability issues.
279 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
280 Handle per-OS dynamic-module compilation flags.
282 PP/02 Let /dev/null have normal permissions.
283 The 4.73 fixes were a little too stringent and complained about the
284 permissions on /dev/null. Exempt it from some checks.
285 Reported by Andreas M. Kirchwitz.
287 PP/03 Report version information for many libraries, including
288 Exim version information for dynamically loaded libraries. Created
289 version.h, now support a version extension string for distributors
290 who patch heavily. Dynamic module ABI change.
292 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
293 privilege escalation vulnerability whereby the Exim run-time user
294 can cause root to append content of the attacker's choosing to
297 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
300 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
301 If dropping privileges for untrusted macros, we disabled normal logging
302 on the basis that it would fail; for the Exim run-time user, this is not
303 the case, and it resulted in successful deliveries going unlogged.
304 Fixed. Reported by Andreas Metzler.
310 PP/01 Date: & Message-Id: revert to normally being appended to a message,
311 only prepend for the Resent-* case. Fixes regression introduced in
312 Exim 4.70 by NM/22 for Bugzilla 607.
314 PP/02 Include check_rfc2047_length in configure.default because we're seeing
315 increasing numbers of administrators be bitten by this.
317 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
319 PP/03 Bugzilla 994: added openssl_options main configuration option.
321 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
323 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
325 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
327 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
328 without a peer certificate, leading to a segfault because of an
329 assumption that peers always have certificates. Be a little more
330 paranoid. Problem reported by Martin Tscholak.
332 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
333 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
334 NB: ClamAV planning to remove STREAM in "middle of 2010".
335 CL also introduces -bmalware, various -d+acl logging additions and
336 more caution in buffer sizes.
338 PP/09 Implemented reverse_ip expansion operator.
340 PP/10 Bugzilla 937: provide a "debug" ACL control.
342 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
344 PP/12 Bugzilla 973: Implement --version.
346 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
348 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
350 PP/15 Bugzilla 816: support multiple condition rules on Routers.
352 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
353 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
354 ignore trailing whitespace.
356 JJ/02 prevent non-panic DKIM error from being sent to paniclog
358 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
361 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
362 Notification from Dr Andrew Aitchison.
364 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
365 ExtendedDetectionInfo response format.
366 Notification from John Horne.
368 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
371 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
372 XSL and documented dependency on system catalogs, with examples of how
375 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
378 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
379 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
380 configuration file which is writeable by the Exim user or group.
382 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
383 of configuration files to cover files specified with the -C option if
384 they are going to be used with root privileges, not just the default
387 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
388 option (effectively making it always true).
390 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
391 files to be used while preserving root privileges.
393 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
394 that rogue child processes cannot use them.
396 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
397 run-time user, instead of root.
399 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
400 Exim run-time user without dropping privileges.
402 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
403 result string, instead of calling string_vformat() twice with the same
406 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
407 for other users. Others should always drop root privileges if they use
408 -C on the command line, even for a whitelisted configure file.
410 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
412 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
418 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
419 $data_path, and $header_path variables; fixed documentation bugs and
422 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
423 exipick to access non-standard spools, including the "frozen" queue
426 NM/01 Bugzilla 965: Support mysql stored procedures.
427 Patch from Alain Williams
429 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
431 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
432 Patch from Andreas Metzler
434 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
435 Patch from Kirill Miazine
437 NM/05 Bugzilla 671: Added umask to procmail example.
439 JJ/03 installed exipick 20100323.0, fixing doc bug
441 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
442 directory. Notification and patch from Dan Rosenberg.
444 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
446 TK/02 Improve log output when DKIM signing operation fails.
448 MH/01 Treat the transport option dkim_domain as a colon separated
449 list, not as a single string, and sign the message with each element,
450 omitting multiple occurences of the same signer.
452 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
453 Bugzilla 985, 986. Patch by Simon Arlott
455 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
456 Patch by Simon Arlott
458 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
459 MBX locking. Notification from Dan Rosenberg.
465 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
467 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
469 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
471 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
473 NM/04 Bugzilla 915: Flag broken perl installation during build.
479 TK/01 Added patch by Johannes Berg that expands the main option
480 "spamd_address" if it starts with a dollar sign.
482 TK/02 Write list of recipients to X-Envelope-Sender header when building
483 the mbox-format spool file for content scanning (suggested by Jakob
486 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
487 (http://www.dcc-servers.net/) support via dccifd. Activated by
488 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
490 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
491 by Mark Daniel Reidel <mr@df.eu>.
493 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
494 When building exim an external PCRE library is now needed -
495 PCRE is a system library on the majority of modern systems.
496 See entry on PCRE_LIBS in EDITME file.
498 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
499 conversation. Added nologin parameter to request.
500 Patch contributed by Kirill Miazine.
502 TF/01 Do not log submission mode rewrites if they do not change the address.
504 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
506 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
507 log files in place. Contributed by Roberto Lima.
509 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
511 TF/03 Bugzilla 615: When checking the local_parts router precondition
512 after a local_part_suffix or local_part_prefix option, Exim now
513 does not use the address's named list lookup cache, since this
514 contains cached lookups for the whole local part.
516 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
517 Robert Millan. Documentation is in experimental-spec.txt.
519 TF/04 Bugzilla 668: Fix parallel build (make -j).
521 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
523 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
524 Patch provided by Jan Srzednicki.
526 TF/05 Leading white space used to be stripped from $spam_report which
527 wrecked the formatting. Now it is preserved.
529 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
530 that they are available at delivery time.
532 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
534 TF/08 TLS error reporting now respects the incoming_interface and
535 incoming_port log selectors.
537 TF/09 Produce a more useful error message if an SMTP transport's hosts
538 setting expands to an empty string.
540 NM/06 Bugzilla 744: EXPN did not work under TLS.
541 Patch provided by Phil Pennock.
543 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
544 Patch provided by Richard Godbee.
546 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
547 acl_smtp_notquit, added index entry.
549 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
550 Patch provided by Eugene Bujak.
552 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
553 accept(). Patch provided by Maxim Dounin.
555 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
556 Patch provided by Phil Pennock.
558 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
560 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
561 Patch provided by Brad "anomie" Jorsch.
563 NM/14 Bugzilla 622: Added timeout setting to transport filter.
564 Patch provided by Dean Brooks.
566 TK/05 Add native DKIM support (does not depend on external libraries).
568 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
569 Patch provided by Graeme Fowler.
571 NM/16 Bugzilla 851: Documentation example syntax fix.
573 NM/17 Changed NOTICE file to remove references to embedded PCRE.
575 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
578 NM/19 Bugzilla 745: TLS version reporting.
579 Patch provided by Phil Pennock.
581 NM/20 Bugzilla 167: bool: condition support.
582 Patch provided by Phil Pennock.
584 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
585 clients. Patch provided by Phil Pennock.
587 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
588 Patch provided by Brad "anomie" Jorsch.
590 NM/23 Bugzilla 687: Fix misparses in eximstats.
591 Patch provided by Heiko Schlittermann.
593 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
594 Patch provided by Heiko Schlittermann.
596 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
597 plus update to original patch.
599 NM/26 Bugzilla 799: Documentation correction for ratelimit.
601 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
602 Patch provided by David Brownlee.
604 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
606 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
608 NM/30 Bugzilla 888: TLS documentation bugfixes.
610 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
612 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
613 Unlike the original bugzilla I have changed all shell scripts in src tree.
615 NM/33 Bugzilla 898: Transport filter timeout fix.
616 Patch by Todd Rinaldo.
618 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
619 Patch by Serge Demonchaux.
621 NM/35 Bugzilla 39: Base64 decode bug fixes.
622 Patch by Jakob Hirsch.
624 NM/36 Bugzilla 909: Correct connect() call in dcc code.
626 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
628 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
630 NM/39 Bugzilla 911: Fixed MakeLinks build script.
636 TK/01 Add preliminary DKIM support. Currently requires a forked version of
637 ALT-N's libdkim that I have put here:
638 http://duncanthrax.net/exim-experimental/
640 Note to Michael Haardt: I had to rename some vars in sieve.c. They
641 were called 'true' and it seems that C99 defines that as a reserved
642 keyword to be used with 'bool' variable types. That means you could
643 not include C99-style headers which use bools without triggering
644 build errors in sieve.c.
646 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
647 as mailq or other aliases. Changed the --help handling significantly
648 to do whats expected. exim_usage() emits usage/help information.
650 SC/01 Added the -bylocaldomain option to eximstats.
652 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
654 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
656 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
662 PH/01 Another patch from the Sieve maintainer.
664 PH/02 When an IPv6 address is converted to a string for single-key lookup
665 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
666 dots are used instead of colons so that keys in lsearch files need not
667 contain colons. This was done some time before quoting was made available
668 in lsearch files. However, iplsearch files do require colons in IPv6 keys
669 (notated using the quote facility) so as to distinguish them from IPv4
670 keys. This meant that lookups for IP addresses in host lists did not work
671 for iplsearch lookups.
673 This has been fixed by arranging for IPv6 addresses to be expressed with
674 colons if the lookup type is iplsearch. This is not incompatible, because
675 previously such lookups could never work.
677 The situation is now rather anomolous, since one *can* have colons in
678 ordinary lsearch keys. However, making the change in all cases is
679 incompatible and would probably break a number of configurations.
681 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
684 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
685 conversion specification without a maximum field width, thereby enabling
686 a rogue spamd server to cause a buffer overflow. While nobody in their
687 right mind would setup Exim to query an untrusted spamd server, an
688 attacker that gains access to a server running spamd could potentially
689 exploit this vulnerability to run arbitrary code as the Exim user.
691 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
692 $primary_hostname instead of what libspf2 thinks the hosts name is.
694 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
695 a directory entry by the name of the lookup key. Previously, if a
696 symlink pointed to a non-existing file or a file in a directory that
697 Exim lacked permissions to read, a lookup for a key matching that
698 symlink would fail. Now it is enough that a matching directory entry
699 exists, symlink or not. (Bugzilla 503.)
701 PH/03 The body_linecount and body_zerocount variables are now exported in the
704 PH/04 Added the $dnslist_matched variable.
706 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
707 This means they are set thereafter only if the connection becomes
710 PH/06 Added the client_condition to authenticators so that some can be skipped
711 by clients under certain conditions.
713 PH/07 The error message for a badly-placed control=no_multiline_responses left
714 "_responses" off the end of the name.
716 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
718 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
719 (without spaces) instead of just copying the configuration text.
721 PH/10 Added the /noupdate option to the ratelimit ACL condition.
723 PH/11 Added $max_received_linelength.
725 PH/12 Added +ignore_defer and +include_defer to host lists.
727 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
728 way in which PCRE > 7.0 is built.
730 PH/14 Implemented queue_only_load_latch.
732 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
733 MAIL command. The effect was to mangle the value on 64-bit systems.
735 PH/16 Another patch from the Sieve maintainer.
737 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
739 PH/18 If a system quota error occurred while trying to create the file for
740 a maildir delivery, the message "Mailbox is full" was not appended to the
741 bounce if the delivery eventually timed out. Change 4.67/27 below applied
742 only to a quota excession during the actual writing of the file.
744 PH/19 It seems that peer DN values may contain newlines (and other non-printing
745 characters?) which causes problems in log lines. The DN values are now
746 passed through string_printing() before being added to log lines.
748 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
749 and InterBase are left for another time.)
751 PH/21 Added message_body_newlines option.
753 PH/22 Guard against possible overflow in moan_check_errorcopy().
755 PH/23 POSIX allows open() to be a macro; guard against that.
757 PH/24 If the recipient of an error message contained an @ in the local part
758 (suitably quoted, of course), incorrect values were put in $domain and
759 $local_part during the evaluation of errors_copy.
765 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
766 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
769 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
770 issue a MAIL command.
772 PH/02 In an ACL statement such as
774 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
776 if a client was not listed at all, or was listed with a value other than
777 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
778 the condition was not true (as it should be), so access was not denied.
779 The bug was that the ! inversion was incorrectly passed on to the second
780 item. This has been fixed.
782 PH/03 Added additional dnslists conditions == and =& which are different from
783 = and & when the dns lookup returns more than one IP address.
785 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
786 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
788 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
789 FSYNC, which compiles an option called disable_fsync that allows for
790 bypassing fsync(). The documentation is heavily laced with warnings.
792 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
794 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
795 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
796 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
797 including adding "make clean"; (3) Added -fPIC when compiling the test
798 dynamically loaded module, to get rid of a warning.
800 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
801 message fails, move_frozen_messages = true and ignore_bounce_errors_after
802 = 0s. The bug is otherwise harmless.
804 PH/07 There was a bug in the dovecot authenticator such that the value of
805 $auth1 could be overwritten, and so not correctly preserved, after a
806 successful authentication. This usually meant that the value preserved by
807 the server_setid option was incorrect.
809 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
811 PH/09 Installed PCRE release 7.0.
813 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
814 run for batched SMTP input. It is now run at the start of every message
815 in the batch. While fixing this I discovered that the process information
816 (output by running exiwhat) was not always getting set for -bs and -bS
817 input. This is fixed, and it now also says "batched" for BSMTP.
819 PH/11 Added control=no_pipelining.
821 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
822 patch, slightly modified), and move the expansion of helo_data till after
823 the connection is made in the smtp transport (so it can use these
826 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
828 PH/14 Added log_selector = +pid.
830 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
832 PH/16 Add ${if forany and ${if forall.
834 PH/17 Added dsn_from option to vary the From: line in DSNs.
836 PH/18 Flush SMTP output before performing a callout, unless control =
837 no_callout_flush is set.
839 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
840 was true (the default) a successful delivery failed to delete the retry
841 item, thus causing premature timeout of the address. The bug is now
844 PH/20 Added hosts_avoid_pipelining to the smtp transport.
846 PH/21 Long custom messages for fakedefer and fakereject are now split up
847 into multiline reponses in the same way that messages for "deny" and
848 other ACL rejections are.
850 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
851 with slight modification.
853 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
854 draft, changing the syntax and factoring some duplicate code".
856 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
857 for deliveries of the second and subsequent messages over the same SMTP
860 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
861 ${reduce, with only minor "tidies".
863 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
865 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
866 expansion side effects.
868 PH/27 When a message times out after an over-quota error from an Exim-imposed
869 quota, the bounce message says "mailbox is full". This message was not
870 being given when it was a system quota that was exceeded. It now should
873 MH/03 Made $recipients available in local_scan(). local_scan() already has
874 better access to the recipient list through recipients_list[], but
875 $recipients can be useful in postmaster-provided expansion strings.
877 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
878 in the case of a MAIL command with additional options following the
879 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
880 were accidentally chopped off.
882 PH/29 SMTP synchronization checks are implemented when a command is read -
883 there is a check that no more input is waiting when there shouldn't be
884 any. However, for some commands, a delay in an ACL can mean that it is
885 some time before the response is written. In this time, more input might
886 arrive, invalidly. So now there are extra checks after an ACL has run for
887 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
888 pipelining has not been advertised.
890 PH/30 MH's patch to allow iscntrl() characters to be list separators.
892 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
893 returned in the SMTP response when smtp_return_error_details was false.
896 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
897 instead of the C I/O that was originally supplied, because problems were
900 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
901 Exim which did not show up earlier: it was assuming that a call to
902 SSL_CTX_set_info_callback() might give an error value. In fact, there is
903 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
904 was a macro that became an assignment, so it seemed to work. This has
905 changed to a proper function call with a void return, hence the compile
906 error. Exim's code has been fixed.
908 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
911 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
913 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
915 PH/37 If a message is not accepted after it has had an id assigned (e.g.
916 because it turns out to be too big or there is a timeout) there is no
917 "Completed" line in the log. When some messages of this type were
918 selected by exigrep, they were listed as "not completed". Others were
919 picked up by some special patterns. I have improved the selection
920 criteria to be more general.
922 PH/38 The host_find_failed option in the manualroute router can now be set
923 to "ignore", to completely ignore a host whose IP address cannot be
924 found. If all hosts are ignored, the behaviour is controlled by the new
925 host_all_ignored option.
927 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
928 homing or because of multiple MX records with /mx) generated more than
929 one IP address, and the following item turned out to be the local host,
930 all the secondary addresses of the first item were incorrectly removed
931 from the list, along with the local host and any following hosts (which
932 is what is supposed to happen).
934 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
935 whoever called Exim into the -H file. In the case of the daemon it was
936 behaving confusingly. When first started, it used values for whoever
937 started the daemon, but after a SIGHUP it used the Exim user (because it
938 calls itself on a restart). I have changed the code so that it now always
941 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
942 message are rejected with the same error (e.g. no authentication or bad
943 sender address), and a DATA command is nevertheless sent (as can happen
944 with PIPELINING or a stupid MUA), the error message that was given to the
945 RCPT commands is included in the rejection of the DATA command. This is
946 intended to be helpful for MUAs that show only the final error to their
949 PH/42 Another patch from the Sieve maintainer.
951 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
952 Eximstats - Fixed some broken HTML links and added missing column headers
954 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
955 columns for Rejects, Temp Rejects, Ham, and Spam rows.
957 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
959 PH/43 Yet another patch from the Sieve maintainer.
961 PH/44 I found a way to check for a TCP/IP connection going away before sending
962 the response to the final '.' that terminates a message, but only in the
963 case where the client has not sent further data following the '.'
964 (unfortunately, this is allowed). However, in many cases there won't be
965 any further data because there won't be any more messages to send. A call
966 to select() can be used: if it shows that the input is "ready", there is
967 either input waiting, or the socket has been closed. An attempt to read
968 the next input character can distinguish the two cases. Previously, Exim
969 would have sent an OK response which the client would never have see.
970 This could lead to message repetition. This fix should cure that, at
971 least in a lot of common cases.
973 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
974 advertised in response to EHLO.
980 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
981 fixed by 4.65/MH/01 (is this a record?) are fixed:
983 (i) An empty string was always treated as zero by the numeric comparison
984 operators. This behaviour has been restored.
986 (ii) It is documented that the numeric comparison operators always treat
987 their arguments as decimal numbers. This was broken in that numbers
988 starting with 0 were being interpreted as octal.
990 While fixing these problems I realized that there was another issue that
991 hadn't been noticed. Values of message_size_limit (both the global option
992 and the transport option) were treated as octal if they started with 0.
993 The documentation was vague. These values are now always treated as
994 decimal, and I will make that clear in the documentation.
1000 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1001 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1004 MH/01 Don't check that the operands of numeric comparison operators are
1005 integers when their expansion is in "skipping" mode (fixes bug
1006 introduced by 4.64-PH/07).
1008 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1009 child addresses, Exim now panics and dies. Previously, because the count
1010 is held in a short int, deliveries were likely to be lost. As such a
1011 large number of recipients for a single message is ridiculous
1012 (performance will be very, very poor), I have chosen to impose a limit
1013 rather than extend the field.
1019 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1020 leftover -K file (the existence of which was triggered by #402).
1021 While we were at it, introduced process PID as part of the -K
1022 filename. This should rule out race conditions when creating
1025 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1026 processing considerably. Previous code took too long for large mails,
1027 triggering a timeout which in turn triggers #401.
1029 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1030 in the DK code in transports.c. sendfile() is not really portable,
1031 hence the _LINUX specificness.
1033 TF/01 In the add_headers option to the mail command in an Exim filter,
1034 there was a bug that Exim would claim a syntax error in any
1035 header after the first one which had an odd number of characters
1038 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1039 callout verification, Exim cached a "reject" for the entire domain. This
1040 is correct for most verifications, but it is not correct for a recipient
1041 verification with use_sender or use_postmaster set, because in that case
1042 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1043 case of MAIL FROM:<> rejection from other early rejections (e.g.
1044 rejection of HELO). When verifying a recipient using a non-null MAIL
1045 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1046 Whatever the result of the callout, the value of the domain cache is
1047 left unchanged (for any other kind of callout, getting as far as trying
1048 RCPT means that the domain itself is ok).
1050 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1053 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1054 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1055 session, the daemon ignores ECONNECT errors and logs others; it now
1056 ignores EPIPE as well.
1058 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1059 (quoted-printable decoding).
1061 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1062 later the small subsequent patch to fix an introduced bug.
1064 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1066 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1068 PH/08 An error is now given if message_size_limit is specified negative.
1070 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1071 to be given (somewhat) arbitrary names.
1073 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1076 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1077 miscellaneous code fixes
1079 PH/10 Added the log_reject_target ACL modifier to specify where to log
1082 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1083 hostname. This is wrong, because it relates to the incoming message (and
1084 probably the interface on which it is arriving) and not to the outgoing
1085 callout (which could be using a different interface). This has been
1086 changed to use the value of the helo_data option from the smtp transport
1087 instead - this is what is used when a message is actually being sent. If
1088 there is no remote transport (possible with a router that sets up host
1089 addresses), $smtp_active_hostname is used.
1091 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1092 tweaks were necessary in order to get it to work (see also 21 below):
1093 (a) The code assumed that strncpy() returns a negative number on buffer
1094 overflow, which isn't the case. Replaced with Exim's string_format()
1096 (b) There were several signed/unsigned issues. I just did the minimum
1097 hacking in of casts. There is scope for a larger refactoring.
1098 (c) The code used strcasecmp() which is not a standard C function.
1099 Replaced with Exim's strcmpic() function.
1100 (d) The code set only $1; it now sets $auth1 as well.
1101 (e) A simple test gave the error "authentication client didn't specify
1102 service in request". It would seem that Dovecot has changed its
1103 interface. Fortunately there's a specification; I followed it and
1104 changed what the client sends and it appears to be working now.
1106 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1109 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1110 address A is aliased to B and C, where B exists and C does not. Without
1111 -v the output is "A verified" because verification stops after a
1112 successful redirection if more than one address is generated. However,
1113 with -v the child addresses are also verified. Exim was outputting "A
1114 failed to verify" and then showing the successful verification for C,
1115 with its parentage. It now outputs "B failed to verify", showing B's
1116 parentage before showing the successful verification of C.
1118 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1119 look up a TXT record in a specific list after matching in a combined
1122 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1123 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1124 they consult the DNS. I had assumed they would set it the way they
1125 wanted; and indeed my experiments on Linux seem to show that in some
1126 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1127 To be on the safe side, however, I have now made the interface to
1128 host_find_byname() similar to host_find_bydns(), with an argument
1129 containing the DNS resolver options. The host_find_byname() function now
1130 sets these options at its start, just as host_find_bydns() does. The smtp
1131 transport options dns_qualify_single and dns_search_parents are passed to
1132 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1133 of host_find_byname() use the default settings of RES_DEFNAMES
1134 (qualify_single) but not RES_DNSRCH (search_parents).
1136 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1137 spool_read_header() do less string testing, by means of a preliminary
1138 switch on the second character of optional "-foo" lines. (This is
1139 overdue, caused by the large number of possibilities that now exist.
1140 Originally there were few.) While I was there, I also converted the
1141 str(n)cmp tests so they don't re-test the leading "-" and the first
1142 character, in the hope this might squeeze out yet more improvement.
1144 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1145 flag allowing group syntax was set by the header_syntax check but not
1146 turned off, possible causing trouble later; (2) The flag was not being
1147 set at all for the header_verify test, causing "group"-style headers to
1148 be rejected. I have now set it in this case, and also caused header_
1149 verify to ignore an empty address taken from a group. While doing this, I
1150 came across some other cases where the code for allowing group syntax
1151 while scanning a header line wasn't quite right (mostly, not resetting
1152 the flag correctly in the right place). These bugs could have caused
1153 trouble for malformed header lines. I hope it is now all correct.
1155 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1156 with the "reply" argument non-NULL. The code, however (which originally
1157 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1158 but it didn't always do it. This confused somebody who was copying the
1159 code for some other use. I have removed all the tests.
1161 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1162 feature that was used to support insecure browsers during the U.S. crypto
1163 embargo. It requires special client support, and Exim is probably the
1164 only MTA that supported it -- and would never use it because real RSA is
1165 always available. This code has been removed, because it had the bad
1166 effect of slowing Exim down by computing (never used) parameters for the
1167 RSA_EXPORT functionality.
1169 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1170 authenticator to fail if there's a tab character in the incoming data
1171 (there should never be unless someone is messing about, as it's supposed
1172 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1173 if the connection is using TLS or if the remote IP is the same as the
1174 local IP, and the "valid-client-cert option" if a client certificate has
1177 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1178 authenticators. This can be used for authorization after authentication
1179 succeeds. (In the case of plaintext, it servers for both authentication
1182 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1183 if any retry times were supplied.
1185 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1186 connection, where there is no client IP address to check. In this
1187 situation, the verify now always succeeds.
1189 PH/25 Applied John Jetmore's -Mset patch.
1191 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1193 PH/27 In a string expansion for a processed (not raw) header when multiple
1194 headers of the same name were present, leading whitespace was being
1195 removed from all of them, but trailing whitespace was being removed only
1196 from the last one. Now trailing whitespace is removed from each header
1197 before concatenation. Completely empty headers in a concatenation (as
1198 before) are ignored.
1200 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1201 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1203 PH/29 [Removed. This was a change that I later backed out, and forgot to
1204 correct the ChangeLog entry (that I had efficiently created) before
1205 committing the later change.]
1207 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1208 address errors (4xx response to RCPT) over the same connection as other
1209 messages routed to the same hosts. Such deliveries are always "forced",
1210 so retry times are not inspected. This resulted in far too many retries
1211 for the affected addresses. The effect occurred only when there were more
1212 hosts than the hosts_max_try setting in the smtp transport when it had
1213 the 4xx errors. Those hosts that it had tried were not added to the list
1214 of hosts for which the message was waiting, so if all were tried, there
1215 was no problem. Two fixes have been applied:
1217 (i) If there are any address or message errors in an SMTP delivery, none
1218 of the hosts (tried or untried) are now added to the list of hosts
1219 for which the message is waiting, so the message should not be a
1220 candidate for sending over the same connection that was used for a
1221 successful delivery of some other message. This seems entirely
1222 reasonable: after all the message is NOT "waiting for some host".
1223 This is so "obvious" that I'm not sure why it wasn't done
1224 previously. Hope I haven't missed anything, but it can't do any
1225 harm, as the worst effect is to miss an optimization.
1227 (ii) If, despite (i), such a delivery is accidentally attempted, the
1228 routing retry time is respected, so at least it doesn't keep
1229 hammering the server.
1231 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1232 in ${readsocket because some servers need this prod.
1234 PH/32 Added some extra debug output when updating a wait-xxx database.
1236 PH/33 The hint "could be header name not terminated by colon", which has been
1237 given for certain expansion errors for a long time, was not being given
1238 for the ${if def:h_colon_omitted{... case.
1240 PH/34 The spec says: "With one important exception, whenever a domain list is
1241 being scanned, $domain contains the subject domain." There was at least
1242 one case where this was not true.
1244 PH/35 The error "getsockname() failed: connection reset by peer" was being
1245 written to the panic log as well as the main log, but it isn't really
1246 panic-worthy as it just means the connection died rather early on. I have
1247 removed the panic log writing for the ECONNRESET error when getsockname()
1250 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1251 runs only) independently of the message's sender address. This meant
1252 that, if the 4xx error was in fact related to the sender, a different
1253 message to the same recipient with a different sender could confuse
1254 things. In particualar, this can happen when sending to a greylisting
1255 server, but other circumstances could also provoke similar problems.
1256 I have changed the default so that the retry time for these errors is now
1257 based a combination of the sender and recipient addresses. This change
1258 can be overridden by setting address_retry_include_sender=false in the
1261 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1262 remote server are returned as part of bounce messages. This was not
1263 happening for LMTP over a pipe (the lmtp transport), but now it is the
1264 same for both kinds of LMTP.
1266 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1267 in header lines that were in fact CNAMEs. This is no longer the case.
1269 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1270 and queue runs started by the daemon processed all messages. This has
1271 been fixed so that -R and -S can now usefully be given with -q<time>.
1273 PH/40 Import PCRE release 6.7 (fixes some bugs).
1275 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1277 PH/42 Give an error if -q is specified more than once.
1279 PH/43 Renamed the variables $interface_address and $interface_port as
1280 $received_ip_address and $received_port, to make it clear that these
1281 values apply to message reception, and not to the outgoing interface when
1282 a message is delivered. (The old names remain recognized, of course.)
1284 PH/44 There was no timeout on the connect() call when using a Unix domain
1285 socket in the ${readsocket expansion. There now is.
1287 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1288 be meaningful with "accept".
1290 SC/01 Eximstats V1.43
1291 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1293 SC/02 Eximstats V1.44
1294 Use a glob alias rather than an array ref in the generated
1295 parser. This improves both readability and performance.
1297 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1298 Collect SpamAssassin and rejection statistics.
1299 Don't display local sender or destination tables unless
1300 there is data to show.
1301 Added average volumes into the top table text output.
1303 SC/04 Eximstats V1.46
1304 Collect data on the number of addresses (recipients)
1305 as well as the number of messages.
1307 SC/05 Eximstats V1.47
1308 Added 'Message too big' to the list of mail rejection
1309 reasons (thanks to Marco Gaiarin).
1311 SC/06 Eximstats V1.48
1312 Mainlog lines which have GMT offsets and are too short to
1313 have a flag are now skipped.
1315 SC/07 Eximstats V1.49 (Alain Williams)
1316 Added the -emptyok flag.
1318 SC/08 Eximstats V1.50
1319 Fixes for obtaining the IP address from reject messages.
1321 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1322 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1323 whitesspace changes from 4.64-PH/27
1325 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1328 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1329 are found, allow negative numbers in numeric criteria)
1331 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1333 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1334 to match changes made in 4.64-PH/43
1336 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1338 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1339 "domain" is actually an IP address, and force a failure. This locks out
1340 those revolvers/nameservers that support "A-for-A" lookups, in
1341 contravention of the specifications.
1343 PH/48 When a host name was looked up from an IP address, and the subsequent
1344 forward lookup of the name timed out, the host name was left in
1345 $sender_host_name, contrary to the specification.
1347 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1348 restricted to single-key lookups, Exim was not diagnosing an error if
1349 * or *@ was used with a query-style lookup.
1351 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1353 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1354 long ago, but noone interested enough thought of it. Let's just say that
1355 the "1.1" means that there are some new functions that weren't there at
1356 some point in the past.
1358 PH/51 Error processing for expansion failure of helo_data from an smtp
1359 transport during callout processing was broken.
1361 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1362 tested/used via the -bh/-bhc/-bs options.
1364 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1365 bug, fixed in subsequent PCRE releases).
1367 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1368 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1370 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1376 SC/01 Use a glob alias rather than an array ref in eximstats generated
1377 parser. This improves both readability and performance.
1379 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1380 Don't display local sender or destination tables in eximstats unless
1381 there is data to show.
1382 Added average volumes into the eximstats top table text output.
1384 SC/03 Collect data on the number of addresses (recipients) as well
1385 as the number of messages in eximstats.
1387 TF/01 Correct an error in the documentation for the redirect router. Exim
1388 does (usually) call initgroups() when daemonizing.
1390 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1391 with consistent privilege compared to when running as a daemon.
1393 TF/03 Note in the spec that $authenticated_id is not set for local
1394 submissions from trusted users.
1396 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1397 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1399 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1400 by adding some example configuration directives to the default
1401 configuration file. A little bit of work is required to uncomment the
1402 directives and define how usernames and passwords are checked, but
1403 there is now a framework to start from.
1405 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1406 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1407 without this. I don't know how relevant this is to other LDAP libraries.
1409 PH/02 Add the verb name to the "unknown ACL verb" error.
1411 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1413 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1415 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1416 directory not expanded when it should be if an expanded home directory
1417 was set for the address (which is overridden by the transport).
1419 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1422 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1423 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1424 because it is too late at that time, and has no effect.
1426 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1427 security issue with \' (bugzilla #107). I could not use the
1428 PQescapeStringConn() function, because it needs a PGconn value as one of
1431 PH/08 When testing addresses using -bt, indicate those final addresses that
1432 are duplicates that would not cause an additional delivery. At least one
1433 person was confused, thinking that -bt output corresponded to deliveries.
1434 (Suppressing duplicates isn't a good idea as you lose the information
1435 about possibly different redirections that led to the duplicates.)
1437 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1438 systems where poll() doesn't work, in particular OS X.
1440 PH/10 Added more information to debugging output for retry time not reached.
1442 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1443 operations in malware.c.
1445 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1448 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1449 syslog_duplication set false, log lines that would normally be written
1450 both the the main log and to the reject log were not written to syslog at
1453 PH/14 In the default configuration, change the use of "message" in ACL warn
1454 statements to "add_header".
1456 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1457 not followed by a command (e.g. "seen endif").
1459 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1460 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1463 PH/17 Added extra conditions to the default value of delay_warning_condition
1467 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1468 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1469 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1472 The Auto-Submitted: and various List- headers are standardised, whereas I
1473 don't think Precedence: ever was.
1475 PH/18 Refactored debugging code in route_finduser() to show more information,
1476 in particular, the error code if getpwnam() issues one.
1478 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1479 This is apparently needed in addition to the PH/07 change above to avoid
1480 any possible encoding problems.
1482 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1483 but not after initializing Perl.
1485 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1486 output them only if debugging. By default they are written stderr,
1487 apparently, which is not desirable.
1489 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1492 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1495 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1497 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1498 authenticated or an ident call has been made. Suppress the default
1499 values for $authenticated_id and $authenticated_sender (but permit -oMai
1500 and -oMas) when testing with -bh.
1502 PH/24 Re-jigged the order of the tests in the default configuration so that the
1503 tests for valid domains and recipients precede the DNS black list and CSA
1504 tests, on the grounds that those ones are more expensive.
1506 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1507 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1508 This bug exists in every version of Exim that I still have, right back to
1511 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1512 However, an attempt to turn on case-sensitivity in a regex key by
1513 including (?-i) didn't work because the subject string was already
1514 lowercased, and the effects were non-intuitive. It turns out that a
1515 one-line patch can be used to allow (?-i) to work as expected.
1521 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1522 other effects) broke the use of negated acl sub-conditions.
1524 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1527 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1528 "Deny" causes Exim to reject the incoming connection with a 554 error.
1529 Unfortunately, if there is a major crisis, such as a disk failure,
1530 tcp-wrappers gives "deny", whereas what one would like would be some
1531 kind of temporary error. A kludge has been added to help with this.
1532 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1533 554 error is used if errno is still zero or contains ENOENT (which occurs
1534 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1537 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1539 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1540 errors. Otherwise a message that provokes a temporary error (when other
1541 messages do not) can cause a whole host to time out.
1543 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1544 addresses were routed directly to files or pipes from a redirect router.
1545 File deliveries just didn't batch; pipe deliveries might have suffered
1548 PH/06 A failure to get a lock for a hints database would erroneously always say
1549 "Failed to get write lock", even when it was really a read lock.
1551 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1552 of 0600. This has been changed to use the value of the lockfile_mode
1553 option (which defaults to 0600).
1555 PH/08 Applied small patch from the Sieve maintainer.
1557 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1558 folder from quota calculations, a direct delivery into this folder messed
1559 up the contents of the maildirsize file. This was because the regex was
1560 used only to exclude .Trash (or whatever) when the size of the mailbox
1561 was calculated. There was no check that a delivery was happening into an
1562 excluded directory. This bug has been fixed by ignoring all quota
1563 processing for deliveries into excluded directories.
1565 PH/10 Added the maildirfolder_create_regex option to appendfile.
1571 PH/01 The code for finding all the local interface addresses on a FreeBSD
1572 system running IPv6 was broken. This may well have applied to all BSD
1573 systems, as well as to others that have similar system calls. The broken
1574 code found IPv4 interfaces correctly, but gave incorrect values for the
1575 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1576 that it would not match correctly against @[] and not recognize the IPv6
1579 PH/02 The ipliteral router was not recognizing addresses of the form user@
1580 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1582 PH/03 Added disable_ipv6.
1584 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1585 decoded form, because it is most often used to construct To: headers
1586 lines in autoreplies, and the decoded form may well be syntactically
1587 invalid. However, $reply_address has leading white space removed, and all
1588 newlines turned into spaces so that the autoreply transport does not
1591 PH/05 If group was specified without a user on a router, and no group or user
1592 was specified on a transport, the group from the router was ignored.
1594 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1595 for visible compile-time settings that can be used to change these
1596 numbers, for those that want even more. Backwards compatibility with old
1597 spool files has been maintained. However, going back to a previous Exim
1598 release will lost any variables that are in spool files.
1600 PH/07 Two small changes when running in the test harness: increase delay when
1601 passing a TCP/IP connection to a new process, in case the original
1602 process has to generate a bounce, and remove special handling of
1603 127.0.0.2 (sic), which is no longer necessary.
1605 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1606 be the same on different OS.
1608 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1611 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1612 whether --show-vars was specified or not
1614 JJ/02 exipick: Added support for new ACL variable spool format introduced
1617 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1618 syntactically invalid From: or Reply-to: line, and a filter used this to
1619 generate an autoreply, and therefore failed to obtain an address for the
1620 autoreply, Exim could try to deliver to a non-existent relative file
1621 name, causing unrelated and misleading errors. What now happens is that
1622 it logs this as a hard delivery error, but does not attempt to create a
1625 PH/11 The exinext utility has a -C option for testing purposes, but although
1626 the given file was scanned by exinext itself; it wasn't being passed on
1627 when Exim was called.
1629 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1630 an end-of-file indication when reading a command response.
1632 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1633 compiled. In many other places in Exim, IPv6 addresses are always
1634 recognized, so I have changed this. It also means that IPv4 domain
1635 literals of the form [IPV4:n.n.n.n] are now always recognized.
1637 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1638 used if the router is not running as root, for example, when verifying at
1639 ACL time, or when using -bh. The debugging output from this situation was
1640 non-existent - all you got was a failure to exec. I have made two
1643 (a) Failures to set uid/gid, the current directory, or a process leader
1644 in a subprocess such as that created by queryprogram now generate
1645 suitable debugging ouput when -d is set.
1647 (b) The queryprogram router detects when it is not running as root,
1648 outputs suitable debugging information if -d is set, and then runs
1649 the subprocess without attempting to change uid/gid.
1651 PH/15 Minor change to Makefile for building test_host (undocumented testing
1654 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1655 additional section of a DNS packet that returns MX or SRV records.
1656 Instead, it always explicitly searches for A/AAAA records. This avoids
1657 major problems that occur when a DNS server includes only records of one
1658 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1659 fixed another bug: if SRV records were looked up and the corresponding
1660 address records were *not* found in the additional section, the port
1661 values from the SRV records were lost.
1663 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1664 using the correct key (the original address) when searching the retry
1665 rules in order to find which one to use for generating the retry hint.
1667 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1668 adding the default one. Similarly, if it contains a Reply-To: header, the
1669 errors_reply_to option, if set, is not used.
1671 PH/19 When calculating a retry time, Exim used to measure the "time since
1672 failure" by looking at the "first failed" field in the retry record. Now
1673 it does not use this if it is later than than the arrival time of the
1674 message. Instead it uses the arrival time. This makes for better
1675 behaviour in cases where some deliveries succeed, thus re-setting the
1676 "first failed" field. An example is a quota failure for a huge message
1677 when small messages continue to be delivered. Without this change, the
1678 "time since failure" will always be short, possible causing more frequent
1679 delivery attempts for the huge message than are intended.
1680 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1682 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1683 $1, $2, $3) because the numerical variables can be reset during some
1684 expansion items (e.g. "match"), thereby losing the authentication data.
1686 PH/21 Make -bV show the size of off_t variables so that the test suite can
1687 decide whether to run tests for quotas > 2G.
1689 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1690 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1691 filecount value is greater than 2G or if a quota value is greater than 2G
1692 on a system where the size of off_t is not greater than 4, a panic error
1695 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1696 never match. The debug and -bh output now contains an explicit error
1697 message indicating a malformed IPv4 address or mask.
1699 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1700 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1701 PH/23 above applies.
1703 PH/25 Do not write to syslog when running in the test harness. The only
1704 occasion when this arises is a failure to open the main or panic logs
1705 (for which there is an explicit test).
1707 PH/26 Added the /no_tell option to "control=freeze".
1709 PH/27 If a host name lookup failed very early in a connection, for example, if
1710 the IP address matched host_lookup and the reverse lookup yielded a name
1711 that did not have a forward lookup, an error message of the form "no IP
1712 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1713 could be logged. Now it outputs the IP address instead of "NULL".
1715 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1716 allows the sender and the authenticated sender to be set when
1717 submitting a message from within Exim. Since child_open_exim() is
1718 documented for local_scan(), the new function should be too.
1720 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1721 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1722 results in an empty string is now treated as unset.
1724 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1726 PH/31 Added sender_verify_fail logging option.
1728 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1729 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1730 tidied the source and removed it altogether.
1732 PH/33 When a queue run was abandoned because the load average was too high, a
1733 log line was always written; now it is written only if the queue_run log
1734 selector is set. In addition, the log line for abandonment now contains
1735 information about the queue run such as the pid. This is always present
1736 in "start" and "stop" lines but was omitted from the "abandon" line.
1738 PH/34 Omit spaces between a header name and the colon in the error message that
1739 is given when verify = headers_syntax fails (if there are lots of them,
1740 the message gets confusing).
1742 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1743 names, as there are now some PTR records that contain slashes. This check
1744 is only to protect against broken name servers that fall over on strange
1745 characters, so the fact that it applies to all lookups doesn't matter.
1747 PH/36 Now that the new test suite is complete, we can remove some of the
1748 special code in Exim that was needed for the old test suite. For example,
1749 sorting DNS records because real resolvers return them in an arbitrary
1750 order. The new test suite's fake resolver always returns records in the
1753 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1754 bounces) except when queue_only is set, to avoid logging races between
1755 the different processes.
1757 PH/38 Panic-die if .include specifies a non-absolute path.
1759 PH/39 A tweak to the "H" retry rule from its user.
1761 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1762 a label. They prevented compilation on older perls.
1764 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1765 a warning to be raised on newish perls.
1767 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1768 on queue. Changes to match documented behaviour of showing count of
1769 messages matching specified criteria.
1771 PH/40 Changed the default ident timeout from 30s to 5s.
1773 PH/41 Added support for the use of login_cap features, on those BSD systems
1774 that have them, for controlling the resources used by pipe deliveries.
1776 PH/42 The content-scanning code uses fopen() to create files in which to put
1777 message data. Previously it was not paying any attention to the mode of
1778 the files. Exim runs with umask(0) because the rest of the code creates
1779 files with open(), and sets the required mode explicitly. Thus, these
1780 files were ending up world-writeable. This was not a big issue, because,
1781 being within the spool directory, they were not world-accessible. I have
1782 created a function called modefopen, which takes an additional mode
1783 argument. It sets umask(777), creates the file, chmods it to the required
1784 mode, then resets the umask. All the relevant calls to fopen() in the
1785 content scanning code have been changed to use this function.
1787 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1788 to 24 hours. This avoids potential overflow problems when processing G
1789 and H retry rules. I suspect nobody ever tinkers with this value.
1791 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1793 PH/45 When the plaintext authenticator is running as a client, the server's
1794 challenges are checked to ensure they are valid base64 strings. By
1795 default, the authentication attempt is cancelled if an invalid string is
1796 received. Setting client_ignore_invalid_base64 true ignores these errors.
1797 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1798 they are received. Thus, the responses can be made to depend on the
1799 challenges. If an invalid string is ignored, an empty string is placed in
1802 PH/46 Messages that are created by the autoreply transport now contains a
1803 References: header, in accordance with RFCs 2822 and 3834.
1805 PH/47 Added authenticated_sender_force to the smtp transport.
1807 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1809 PH/49 Installed latest patch from the Sieve maintainer.
1811 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1812 was also set, the appendfile transport was unnecessarily scanning a
1813 directory of message files (e.g. for maildir delivery) to find the count
1814 of files (along with the size), even though it did not need this
1815 information. It now does the scan only if it needs to find either the
1816 size of the count of files.
1818 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1820 PH/52 Two bugs concerned with error handling when the smtp transport is
1823 (i) Exim was not creating retry information for temporary errors given
1824 for individual recipients after the DATA command when the smtp transport
1825 was used in LMTP mode. This meant that they could be retried too
1826 frequently, and not timed out correctly.
1828 (ii) Exim was setting the flag that allows error details to be returned
1829 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1830 recipients that were returned after the DATA command.
1832 PH/53 This is related to PH/52, but is more general: for any failing address,
1833 when detailed error information was permitted to be returned to the
1834 sender, but the error was temporary, then after the final timeout, only
1835 "retry timeout exceeded" was returned. Now it returns the full error as
1836 well as "retry timeout exceeded".
1838 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1839 do this, and (what is worse) MTAs that accept it.
1841 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1842 will now be deprecated.
1844 PH/56 New os.c-cygwin from the Cygwin maintainer.
1846 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1847 formats (previously only available in exim formats via -bpr, -bpru,
1848 and -bpra. Now also available in native and exiqgrep formats)
1850 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1851 with very large, slow to parse queues
1853 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1855 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1857 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1858 responses to authentication challenges, though it was showing the
1859 challenges; (ii) I've removed the CR characters from the debug output for
1862 PH/58 Allow for the insertion of a newline as well as a space when a string
1863 is turned into more than one encoded-word during RFC 2047 encoding. The
1864 Sieve code now uses this.
1866 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1867 data_4xx, lost_connection, tls_required.
1869 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1870 message was being sent as an SMTP response.
1872 PH/61 Add -l and -k options to exicyclog.
1874 PH/62 When verifying, if an address was redirected to one new address, so that
1875 verification continued, and the new address failed or deferred after
1876 having set something in $address_data, the value of $address_data was not
1877 passed back to the ACL. This was different to the case when no
1878 redirection occurred. The value is now passed back in both cases.
1880 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1881 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1882 use login_cap.h, so on its own it isn't the distinguishing feature. The
1883 new name refers directly to the setclassresources() function.
1885 PH/65 Added configuration files for NetBSD3.
1887 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1889 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1890 is preferred over IPv4.
1892 PH/68 The bounce_return_message and bounce_return_body options were not being
1893 honoured for bounces generated during the reception of non-SMTP messages.
1894 In particular, this applied to messages rejected by the ACL. This bug has
1895 been fixed. However, if bounce_return_message is true and bounce_return_
1896 body is false, the headers that are returned for a non-SMTP message
1897 include only those that have been read before the error was detected.
1898 (In the case of an ACL rejection, they have all been read.)
1900 PH/69 The HTML version of the specification is now built in a directory called
1901 spec_html instead of spec.html, because the latter looks like a path with
1902 a MIME-type, and this confuses some software.
1904 PH/70 Catch two compiler warnings in sieve.c.
1906 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1907 function verify_get_ident() calls ip_connect() to connect a socket, but
1908 if the "connect()" function timed out, ip_connect() used to close the
1909 socket. However, verify_get_ident() also closes the socket later, and in
1910 between Exim writes to the log, which may get opened at this point. When
1911 the socket was closed in ip_connect(), the log could get the same file
1912 descriptor number as the socket. This naturally causes chaos. The fix is
1913 not to close the socket in ip_connect(); the socket should be closed by
1914 the function that creates it. There was only one place in the code where
1915 this was missing, in the iplookup router, which I don't think anybody now
1916 uses, but I've fixed it anyway.
1918 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1919 well as to direct DNS lookups. Otherwise the handling of names in host
1920 lists is inconsistent and therefore confusing.
1926 PH/01 Two changes to the default runtime configuration:
1928 (1) Move the checks for relay_from_hosts and authenticated clients from
1929 after to before the (commented out) DNS black list checks.
1931 (2) Add control=submission to the relay_from_hosts and authenticated
1932 clients checks, on the grounds that messages accepted by these
1933 statements are most likely to be submissions.
1935 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1937 (1) Generate an error if the third argument for the ${prvs expansion is
1940 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1943 (3) Reset the variables that are obtained from the first argument of
1944 ${prvscheck and used in the second argument before leaving the code,
1945 because their memory is reclaimed, so using them afterwards may do
1948 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1949 one (it's much easier than Tom thought :-).
1951 (5) Because of (4), we can now allow for the use of $prvscheck_result
1952 inside the third argument.
1954 PH/03 For some reason, the default setting of PATH when running a command from
1955 a pipe transport was just "/usr/bin". I have changed it to
1958 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1959 anything to be listed in the output from -bV.
1961 PH/05 When a filter generated an autoreply, the entire To: header line was
1962 quoted in the delivery log line, like this:
1964 => >A.N.Other <ano@some.domain> <original@ddress> ...
1966 This has been changed so that it extracts the operative address. There
1967 may be more than one such address. If so, they are comma-separated, like
1970 => >ano@some.domain,ona@other.domain <original@ddress> ...
1972 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1973 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1974 not being looked up in the rDNS to get a host name, Exim was showing the
1975 IP address twice in Received: lines, even though the IP addresses were
1976 identical. For example:
1978 Received: from [1.2.3.4] (helo=[1.2.3.4])
1980 However, if the real host name was known, it was omitting the HELO data
1981 if it matched the actual IP address. This has been tidied up so that it
1982 doesn't show the same IP address twice.
1984 PH/07 When both +timestamp and +memory debugging was on, the value given by
1985 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1986 called by the debug printing, thereby overwriting the timestamp buffer.
1987 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1989 PH/08 When the original message was included in an autoreply transport, it
1990 always said "this is a copy of the message, including all the headers",
1991 even if body_only or headers_only was set. It now gives an appropriate
1994 PH/09 Applied a patch from the Sieve maintainer which:
1996 o fixes some comments
1997 o adds the (disabled) notify extension core
1998 o adds some debug output for the result of if/elsif tests
1999 o points to the current vacation draft in the documentation
2000 and documents the missing references header update
2004 o fixes a bug in processing the envelope test (when testing
2005 multiple envelope elements, the last element determinted the
2008 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2009 Electronic Mail") by including:
2011 Auto-submitted: auto-generated
2013 in the messages that it generates (bounce messages and others, such as
2014 warnings). In the case of bounce messages for non-SMTP mesages, there was
2015 also a typo: it was using "Auto_submitted" (underscore instead of
2016 hyphen). Since every message generated by Exim is necessarily in response
2017 to another message, thes have all been changed to:
2019 Auto-Submitted: auto-replied
2021 in accordance with these statements in the RFC:
2023 The auto-replied keyword:
2025 - SHOULD be used on messages sent in direct response to another
2026 message by an automatic process,
2028 - MUST NOT be used on manually-generated messages,
2030 - MAY be used on Delivery Status Notifications (DSNs) and Message
2031 Disposition Notifications (MDNs),
2033 - MUST NOT be used on messages generated by automatic or periodic
2034 processes, except for messages which are automatic responses to
2037 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2038 to the default Received: header definition.
2040 PH/12 Added log selector acl_warn_skipped (default on).
2042 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2043 variables because (a) they are in the wrong storage pool and (b) even if
2044 they were copied, it wouldn't work properly because of the caching.
2046 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2047 checking when decoding. Apparently there are clients that generate
2048 overlong encoded strings. Why am I not surprised?
2050 PH/15 If the first argument of "${if match_address" was not empty, but did not
2051 contain an "@" character, Exim crashed. Now it writes a panic log message
2052 and treats the condition as false.
2054 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2056 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2057 extension "envelope-auth". The code is finished and in agreement with
2058 other implementations, but there is no documentation so far and in fact,
2059 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2060 not changing the active code.
2062 Print executed "if" and "elsif" statements when debugging is used. This
2063 helps a great deal to understand what a filter does.
2065 Document more things not specified clearly in RFC3028. I had all this
2066 sorted out, when out of a sudden new issues came to my mind. Oops."
2068 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2071 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2072 canonical form (as documented). However, after a host name lookup from
2073 the IP address, check_host() was doing a simple string comparison with
2074 addresses acquired from the DNS when checking that the found name did
2075 have the original IP as one of its addresses. Since any found IPv6
2076 addresses are likely to be in abbreviated form, the comparison could
2077 fail. Luckily, there already exists a function for doing the comparison
2078 by converting both addresses to binary, so now that is used instead of
2079 the text comparison.
2081 PH/20 There was another similar case to PH/19, when a complete host name was
2082 given in a host list; looking up its IP address could give an abbreviated
2083 form, whereas the current host's name might or might not be abbreviated.
2084 The same fix has been applied.
2090 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2091 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2094 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2095 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2097 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2099 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2100 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2101 Also, for "Auto-Submitted", treat anything other than "no" as
2102 non-personal, in accordance with RFC 3834. (Previously it treated
2103 anything starting "auto-" as non-personal.)
2105 TF/01 The control=submission/name=... option had a problem with syntax
2106 errors if the name included a slash character. The /name= option
2107 now slurps the rest of the string, so it can include any characters
2108 but it must come last in the list of options (after /sender_retain
2111 PH/05 Some modifications to the interface to the fake nameserver for the new
2119 TK/01 Added the "success_on_redirect" address verification option. See
2120 NewStuff for rationale and an example.
2122 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2124 PH/02 Patch to exigrep to allow it to work on syslog lines.
2126 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2127 fread() to skip over the body file's header line, because in Cygwin the
2128 header line is locked and is inaccessible.
2130 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2131 co-exist for some time) to make it clear that it is the Exim ID that is
2132 referenced, not the Message-ID: header line.
2134 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2135 string_format() function, because snprintf() does not exist on all
2138 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2139 ${stat: expansion item.
2141 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2142 protocol synchronization error", to keep the pedants happy.
2144 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2145 well as for IRIX systems, when gcc is being used. See the host.c source
2148 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2150 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2153 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2154 transport and to the smtp transport in LMTP mode.
2156 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2158 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2159 run a filter in a subprocess. This could lead to confusion in subsequent
2160 lookups in the parent process. There should also be a search_tidyup() at
2161 the end of the subprocess.
2163 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2164 only if the host matched helo_try_verify_hosts, which caused the
2165 verification to occur when the EHLO/HELO command was issued. The ACL just
2166 tested the remembered result. Now, if a previous verification attempt has
2167 not happened, "verify = helo" does it there and then.
2169 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2171 TK/03 Fix log output including CR from clamd.
2173 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2174 exist provoked a memory error which could cause a segfault.
2176 PH/15 Installed PCRE 6.2
2178 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2180 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2181 of the problem. Specifically, suggested +O2 rather than +O1 for the
2184 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2186 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2187 record, the port was not correctly logged when the outgoing_port log
2188 selector was set (it logged the transort's default port).
2190 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2191 fallback_hosts, and "hosts" in the smtp transport.
2193 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2194 host errors such as "Connection refused".
2196 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2197 authentication with radiusclient 0.4.9:
2199 - Error returned from rc_read_config was caught wrongly
2200 - Username/password not passed on to radius server due to wrong length.
2202 The presumption is that some radiusclient API changes for 4.51/PH/17
2203 were not taken care of correctly. The code is still untested by me (my
2204 Linux distribution still has 0.3.2 of radiusclient), but it was
2205 contributed by a Radius user.
2207 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2208 expanding the "port" option of the smtp transport.
2210 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2211 while reading a MIME header. Thanks to Tom Hughes for a patch.
2213 PH/24 Include config.h inside local_scan.h so that configuration settings are
2216 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2217 that in an ACL for RCPT (for example), you can examine exactly what was
2220 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2221 commands, but it was not correctly comparing the address with the actual
2222 client host address. Thus, it would show the EHLO address in Received:
2223 header lines when this was not necessary.
2225 PH/27 Added the % operator to ${eval:}.
2227 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2228 it should be ignoring failures (because with -C, for example, it has lost
2229 privilege). It wasn't ignoring creation failures other than "already
2232 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2235 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2236 because an input line was too long, either on its own, or by virtue of
2237 too many continuations, the temporary file was not being removed, and the
2238 return code was incorrect.
2240 PH/31 Missing "BOOL" in function definition in filtertest.c.
2242 PH/32 Applied Sieve patches from the maintainer.
2244 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2246 PH/33 Added "verify = not_blind".
2248 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2249 Local/Makefile (with some defaults set). These are used in built scripts
2250 such as exicyclog, but they have never been used in the exim_install
2251 script (though there are many overriding facilities there). I have
2252 arranged that the exim_install script now takes note of these two
2255 PH/35 Installed configuration files for Dragonfly.
2257 PH/36 When a locally submitted message by a trusted user did not contain a
2258 From: header, and the sender address was obtained from -f or from an SMTP
2259 MAIL command, and the trusted user did not use -F to supply a sender
2260 name, $originator_name was incorrectly used when constructing a From:
2261 header. Furthermore, $originator_name was used for submission mode
2262 messages from external hosts without From: headers in a similar way,
2263 which is clearly wrong.
2265 PH/37 Added control=suppress_local_fixups.
2267 PH/38 When log_selector = +received_sender was set, and the addition of the
2268 sender made the log line's construction buffer exactly full, or one byte
2269 less than full, an overflow happened when the terminating "\n" was
2272 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2273 when the result of a list match is failure because a DNS lookup failed.
2275 PH/40 RM_COMMAND is now used in the building process.
2277 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2278 the "build-* directories that it finds.
2280 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2281 address in a domain literal was a prefix of an interface address.
2283 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2284 when verifying a sender address, unless rewrite_headers is false.
2286 PH/44 Wrote a long comment about why errors_to addresses are verified as
2287 recipients, not senders.
2289 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2290 the ratelimit ACL was added.
2292 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2294 PH/46 Added extra information about PostgreSQL errors to the error string.
2296 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2297 avoiding the need to install special zones in a real server. This is
2298 backwards compatible; if it can't find the fake resolver, it drops back.
2299 Thus, both old and new test suites can be run.
2301 TF/02 Added util/ratelimit.pl
2303 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2304 clock is set back in time.
2306 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2307 Candler <B.Candler@pobox.com>.
2309 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2310 OK for addresses that are the result of redirections.
2312 PH/48 A number of further additions for the benefit of the new test suite,
2313 including a fake gethostbyname() that interfaces to the fake DNS resolver
2316 TF/06 The fix for widen_domains has also been applied to qualify_single and
2317 search_parents which are the other dnslookup options that can cause
2320 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2323 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2325 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2326 service" if it encountered an MX record with an empty target hostname.
2327 The message is now "an MX or SRV record indicated no SMTP service".
2329 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2330 if the DNS of the sending site is misconfigured. This is quite a
2331 common situation. This change restores the behaviour of treating a
2332 helo verification defer as a failure.
2334 PH/51 If self=fail was set on a router, the bounce message did not include the
2335 actual error message.
2341 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2343 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2344 command itself ended in error, the underlying message about the transport
2345 filter timeout was being overwritten with the pipe command error. Now the
2346 underlying error message should be appended to the second error message.
2348 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2350 PH/02 Reduce the amount of output that "make" produces by default. Full output
2351 can still be requested.
2353 PH/03 The warning log line about a condition test deferring for a "warn" verb
2354 was being output only once per connection, rather than after each
2355 occurrence (because it was using the same function as for successful
2356 "warn" verbs). This seems wrong, so I have changed it.
2358 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2359 it should not have, which might have caused a crash in the right
2360 circumstances, but probably never did.
2362 PH/04 Installed a modified version of Tony Finch's patch to make submission
2363 mode fix the return path as well as the Sender: header line, and to
2364 add a /name= option so that you can make the user's friendly name appear
2367 TF/03 Added the control = fakedefer ACL modifier.
2369 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2370 Mark Lowes for thorough testing.
2372 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2374 TK/03 Merged latest SRS patch from Miles Wilton.
2376 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2377 with the definition in sysexits.h (which is #included earlier).
2378 Fortunately, Exim does not actually use EX_OK. The code used to try to
2379 preserve the sysexits.h value, by assumimg that macro definitions were
2380 scanned for macro replacements. I have been disabused of this notion,
2381 so now the code just undefines EX_OK before #including unistd.h.
2383 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2384 in the smtp transport. When a block could not be written in a single
2385 write() function, the timeout was being re-applied to each part-write.
2386 This seems wrong - if the receiver was accepting one byte at a time it
2387 would take for ever. The timeout is now adjusted when this happens. It
2388 doesn't have to be particularly precise.
2390 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2391 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2393 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2394 without a domain if the check to <postmaster@domain> fails.
2396 SC/01 Eximstats: added -xls and the ability to specify output files
2397 (patch written by Frank Heydlauf).
2399 SC/02 Eximstats: use FileHandles for outputing results.
2401 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2403 SC/04 Eximstats: fixed display of large numbers with -nvr option
2405 SC/05 Eximstats: fixed merging of reports with empty tables.
2407 SC/06 Eximstats: added the -include_original_destination flag
2409 SC/07 Eximstats: removed tabs and trailing whitespace.
2411 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2413 TK/06 MBOX spool code: Add real "From " MBOX separator line
2414 so the .eml file is really in mbox format (even though
2415 most programs do not really care). Patch from Alex Miller.
2417 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2418 The latter is generated from $received_to and is only set if the
2419 message has one envelope recipient. SA can use these headers,
2420 obviously out-of-the-box. Patch from Alex Miller.
2422 PH/08 The ${def test on a variable was returning false if the variable's
2423 value was "0", contrary to what the specification has always said!
2424 The result should be true unless the variable is empty.
2426 PH/09 The syntax error of a character other than { following "${if
2427 def:variable_name" (after optional whitespace) was not being diagnosed.
2428 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2429 accidental colon was present, for example, could give incorrect results.
2431 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2432 result is used (not including appendfile, where other changes are about
2435 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2436 This involved changing a lot of size variables from int to off_t. It
2437 should work with maildirs and everything.
2439 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2440 spamd dying while we are connected to it.
2442 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2445 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2446 function for BDB 4.3.
2448 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2450 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2451 the sources for PCRE have been re-arranged and more files are now
2454 PH/15 The code I had for printing potentially long long variables in PH/11
2455 above was not the best (it lost precision). The length of off_t variables
2456 is now inspected at build time, and an appropriate printing format (%ld
2457 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2458 to be "long long int" or "long int". This is needed for the internal
2459 formatting function string_vformat().
2461 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2462 the configuration file to be ":syslog", then the script "guesses" where
2463 the logs files are, rather than using the compiled in default. In our
2464 case the guess is not the same as the compiled default, so the script
2465 suddenly stopped working when I started to use syslog. The patch checks
2466 to see if log_file_path is "". If so, it attempts to read it from exim
2467 with no configuration file to get the compiled in version, before it
2468 falls back to the previous guessing code."
2470 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2471 implementing BATV in an Exim configuration. See NewStuff for the gory
2474 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2475 Makefile that are specific to HP-UX.
2477 PH/18 If the "use_postmaster" option was set for a recipient callout together
2478 with the "random" option, the postmaster address was used as the MAIL
2479 FROM address for the random test, but not for the subsequent recipient
2480 test. It is now used for both.
2482 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2483 patch removes a few documentation additions to RFC 3028, because the
2484 latest draft now contains them. It adds the new en;ascii-case comparator
2485 and a new error check for 8bit text in MIME parts. Comparator and
2486 require names are now matched exactly. I enabled the subaddress
2487 extension, but it is not well tested yet (read: it works for me)."
2489 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2490 rework some of the code of TK/09 above to avoid the hardwired use of
2491 "%lld" and "long long". Replaced the call to snprintf() with a call to
2494 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2495 records point to non-existent hosts", "retry timeout exceeded", and
2496 "retry time not reached for any host after a long failure period".
2498 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2499 experimental DomainKeys support:
2501 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2502 (2) On an error such as an illegally used "control", the wrong name for
2503 the control was given.
2505 These problems did NOT occur unless DomainKeys support was compiled.
2507 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2509 PH/24 Added ${if match_ip condition.
2511 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2512 databases so that it will be absolutely obvious if a crash occurs in the
2513 DB library. This is a regular occurrence (often caused by mis-matched
2516 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2517 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2518 picked up on a user's system that detects such things. There doesn't seem
2519 to be a gcc warning option for this - only an attribute that has to be
2520 put on the function's prototype. It seems that in Fedora Core 4 they have
2521 set this on a number of new functions. No doubt there will be more in due
2524 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2525 specify a transport. However, if an address that was verified by such a
2526 router was the subject of a callout, Exim crashed because it tried to
2527 read the rcpt_include_affixes from the non-existent transport. Now it
2528 just assumes that the setting of that option is false. This bug was
2529 introduced by 4.51/PH/31.
2531 PH/28 Changed -d+all to exclude +memory, because that information is very
2532 rarely of interest, but it makes the output a lot bigger. People tend to
2533 do -d+all out of habit.
2535 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2536 code in os-type was giving problems when libc.so lives in lib64, like on
2539 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2540 aren't the modern standard, and it seems that some systems' include files
2541 don't always have them. Exim was already checking for some of the newer
2542 ones like T_AAAA, and defining it itself. I've added checks for all the
2543 record types that Exim uses.
2545 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2546 not automatically generating a new one, as it is supposed to. This
2547 prevented TLS from working. If the file did exist, but contained invalid
2548 data, a new version was generated, as expected. It was only the case of a
2549 non-existent file that was broken.
2551 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2552 with a change in libdomainkeys > 0.64.
2554 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2555 from DNS. If the selector record carries the flag, it now has
2556 precedence over the domain-wide flag.
2558 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2560 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2561 the use of a port name that isn't defined in /etc/services) occurred, the
2562 message was deferred as in a normal delivery, and thus remained on the
2563 spool, instead of being failed because of the mua_wrapper setting. This
2564 is now fixed, and I tidied up some of the mua_wrapper messages at the
2567 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2568 the messages in a hash of arrays rather than using individual hashes.
2569 This is a bit cleaner and results in dramatic memory savings, albeit
2570 at a slight CPU cost.
2572 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2573 as requested by Marc Sherman.
2575 SC/10 Eximstats: added histograms for user specified patterns as requested
2578 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2580 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2581 fopen() in the content-scanning modules that did not already have it.
2587 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2588 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2590 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2592 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2594 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2595 to test Sieve filters that use "vacation".
2597 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2598 that changes the way the GnuTLS parameters are stored in the cache file.
2599 The new format can be generated externally. For backward compatibility,
2600 if the data in the cache doesn't make sense, Exim assumes it has read an
2601 old-format file, and it generates new data and writes a new file. This
2602 means that you can't go back to an older release without removing the
2605 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2606 work if there are any delivery delays because "one_time" forces the
2607 parent to be marked "delivered", so its unseen clone is never tried
2608 again. For this reason, Exim now forbids the simultaneous setting of
2611 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2612 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2613 entry if you want to know the details. The fix, however, neglected to
2614 consider the case when local delivery batching is involved. The test for
2615 "previously delivered" was not happening when checking to see if an
2616 address could be batched with a previous (undelivered) one; under
2617 certain circumstances this could lead to multiple deliveries to the same
2620 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2621 in its include files, and this causes problems building Exim.
2623 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2624 header_syntax) but Exim was just ignoring anything given after a slash.
2625 In particular, this caused confusion with an attempt to use "verify =
2626 reverse_host_lookup/defer_ok". An error is now given when options are
2627 supplied for verify items that do not have them. (Maybe reverse_host_
2628 lookup should have a defer_ok option, but that's a different point.)
2630 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2631 defined by RFC 821) to 2048, because there were problems with some AUTH
2632 commands, and RFC 1869 says the size should be increased for extended
2633 SMTP commands that take arguments.
2635 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2638 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2639 "unknown" error; now it says that the functionality isn't in the binary.
2641 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2642 an address' error message when a string expansion fails (syntax or
2643 whatever). Otherwise the password may appear in the log. Following change
2644 PH/42 below, there is no longer a chance of it appearing in a bounce
2647 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2649 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2650 of its addresses was ever tried. (Bugzilla bug #2.)
2652 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2653 the result incorrectly in the debug output. (It correctly added a newline
2654 to what was transported.)
2656 TF/01 Added $received_time.
2658 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2659 commented out examples of how to interface to a virus scanner and to
2660 SpamAssassin. Also added commented examples of av_scanner and
2661 spamd_address settings.
2663 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2664 and controls are allowed in which ACLs. There were a couple of minor
2665 errors. Some of the entries in the conditions table (which is a table of
2666 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2667 negation of where the condition IS allowed.
2669 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2671 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2672 header file does not have a version number, so I've had to invent a new
2673 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2674 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2675 radiusclient), but it was contributed by a Radius user.
2677 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2678 files or directories, for OpenSSL.
2680 PH/19 When an Exim process that is running as root has to create an Exim log
2681 file, it does so in a subprocess that runs as exim:exim so as to get the
2682 ownership right at creation (otherwise, other Exim processes might see
2683 the file with the wrong ownership). There was no test for failure of this
2684 fork() call, which would lead to the process getting stuck as it waited
2685 for a non-existent subprocess. Forks do occasionally fail when resources
2686 run out. I reviewed all the other calls to fork(); they all seem to check
2689 PH/20 When checking for unexpected SMTP input at connect time (before writing
2690 the banner), Exim was not dealing correctly with a non-positive return
2691 from the read() function. If the client had disconnected by this time,
2692 the result was a log entry for a synchronization error with an empty
2693 string after "input=" when read() returned zero. If read() returned -1
2694 (an event I could not check), uninitialized data bytes were printed.
2695 There were reports of junk text (parts of files, etc) appearing after
2698 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2700 PH/22 Added support for macro redefinition, and (re)definition in between
2701 driver and ACL definitions.
2703 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2704 forgetting to use the resulting value; it was using the unexpanded value.
2706 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2707 hadn't been configured. The fix is from Juergen Kreileder, who
2708 understands it better than I do:
2710 "Here's what I see happening with three configured cyrus_sasl
2711 authenticators configured (plain, login, cram-md5):
2713 On startup auth_cyrus_sasl_init() gets called for each of these.
2714 This means three calls to sasl_listmech() without a specified mech_list.
2715 => SASL tests which mechs of all available mechs actually work
2716 => three warnings about OTP not working
2717 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2719 With the patch, sasl_listmech() also gets called three times. But now
2720 SASL's mech_list option is set to the server_mech specified in the the
2721 authenticator. Or in other words, the answer from sasl_listmech()
2722 gets limited to just the mech you're testing for (which is different
2724 => the return list contains just 'plain' or 'login', 'cram-md5' or
2725 nothing depending on the value of ob->server_mech.
2727 I've just tested the patch: Authentication still works fine,
2728 unavailable mechs specified in the exim configuration are still
2729 caught, and the auth.log warnings about OTP are gone."
2731 PH/25 When debugging is enabled, the contents of the command line are added
2732 to the debugging output, even when log_selector=+arguments is not
2735 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2736 answer is "GNU", and only if the return is "GNU/something" is the answer
2739 PH/27 $acl_verify_message is now set immediately after the failure of a
2740 verification in an ACL, and so is available in subsequent modifiers. In
2741 particular, the message can be preserved by coding like this:
2743 warn !verify = sender
2744 set acl_m0 = $acl_verify_message
2746 Previously, $acl_verify_message was set only while expanding "message"
2747 and "log_message" when a very denied access.
2749 PH/28 Modified OS/os.c-Linux with
2751 -#ifndef OS_LOAD_AVERAGE
2752 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2754 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2755 nomenclature these days.)
2757 PH/29 Installed patch from the Sieve maintainer that adds the options
2758 sieve_useraddress and sieve_subaddress to the redirect router.
2760 PH/30 In these circumstances:
2761 . Two addresses routed to the same list of hosts;
2762 . First host does not offer TLS;
2763 . First host accepts first address;
2764 . First host gives temporary error to second address;
2765 . Second host offers TLS and a TLS session is established;
2766 . Second host accepts second address.
2767 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2768 and peerdn, if requested) that were in fact used only for the second
2771 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2772 attention to any local part prefix or suffix that was matched by the
2773 router that accepted the address. It now behaves in the same way as it
2774 does for delivery: the affixes are removed from the local part unless
2775 rcpt_include_affixes is set on the transport.
2777 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2778 timeout during the DATA phase of an incoming message.
2780 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2781 applied a patch sanctioned by the Sieve maintainer.
2783 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2784 the uid or gid is negative. A case of a negative gid caused this to be
2785 noticed. The fix allows for either to be negative.
2787 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2788 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2791 PH/36 The change PH/12 above was broken. Fixed it.
2793 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2794 the grounds that routing the same address twice would always produce the
2795 same answer. This might have been true once, but it is certainly no
2796 longer true now. Routing a child address may depend on the previous
2797 routing that produced that child. Some complicated redirection strategies
2798 went wrong when messages had multiple recipients, and made Exim's
2799 behaviour dependent on the order in which the addresses were given.
2801 I have moved the duplicate checking until after the routing is complete.
2802 Exim scans the addresses that are assigned to local and remote
2803 transports, and removes any duplicates. This means that more work will be
2804 done, as duplicates will always all be routed, but duplicates are
2805 presumably rare, so I don't expect this is of any significance.
2807 For deliveries to pipes, files, and autoreplies, the duplicate checking
2808 still happens during the routing process, since they are not going to be
2811 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2812 It corrects a timeout issue with spamd. This is Ian's comment: "The
2813 background is that sometimes spamd either never reads data from a
2814 connection it has accepted, or it never writes response data. The exiscan
2815 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2816 blindly assumes that writes won't block so it may never time out."
2818 PH/39 Allow G after quota size as well as K and M.
2820 PH/40 The value set for $authenticated_id in an authenticator may not contain
2821 binary zeroes or newlines because the value is written to log lines and
2822 to spool files. There was no check on this. Now the value is run through
2823 the string_printing() function so that such characters are converted to
2824 printable escape sequences.
2826 PH/41 $message_linecount is a new variable that contains the total number of
2827 lines in the message. Compare $body_linecount, which is the count for the
2830 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2831 bounce and delay warning messages, except in certain special cases, which
2834 (a) An SMTP error message from a remote host;
2835 (b) A message specified in a :fail: redirection;
2836 (c) A message specified in a "fail" command in a system filter;
2837 (d) A message specified in a FAIL return from the queryprogram router;
2838 (e) A message specified by the cannot_route_message router option.
2840 In these cases only, Exim does include the error details in bounce and
2841 warning messages. There are also a few cases where bland messages such
2842 as "unrouteable address" or "local delivery error" are given.
2844 PH/43 $value is now also set for the "else" part of a ${run expansion.
2846 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2847 being worked on, but at least Exim now implements the latest version to
2850 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2851 process to complete was treated as a delivery failure, a timeout while
2852 writing the message to the pipe was logged, but erroneously treated as a
2853 successful delivery. Such timeouts include transport filter timeouts. For
2854 consistency with the overall process timeout, these timeouts are now
2855 treated as errors, giving rise to delivery failures by default. However,
2856 there is now a new Boolean option for the pipe transport called
2857 timeout_defer, which, if set TRUE, converts the failures into defers for
2858 both kinds of timeout. A transport filter timeout is now identified in
2861 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2862 systems where "make" and "gmake" are different, calling "gmake" at top
2863 level broke things. I've arranged for the value of $(MAKE) to be passed
2864 from the Makefile to this script so that it can call the same version of
2868 A note about Exim versions 4.44 and 4.50
2869 ----------------------------------------
2871 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2872 changes of various kinds. As a consequence, a big documentation update was
2873 needed. This delayed the release for rather longer than seemed good, especially
2874 in the light of a couple of (minor) security issues. Therefore, the changes
2875 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2876 release. So 4.44 and 4.50 are in effect two different branches that both start
2879 I have left the 4.50 change log unchanged; it contains all the changes since
2880 4.43. The change log for 4.44 is below; many of its items are identical to
2881 those for 4.50. This seems to be the most sensible way to preserve the
2882 historical information.
2888 1. Minor wording change to the doc/README.SIEVE file.
2890 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2891 computation of the current number of files was incorrect.
2893 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2894 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2897 4. Give more explanation in the error message when the command for a transport
2898 filter fails to execute.
2900 5. There are several places where Exim runs a non-Exim command in a
2901 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2902 was being done only for the command run by the queryprogram router. It is
2903 now done for all such subprocesses. The other cases are: ${run, transport
2904 filters, and the commands run by the lmtp and pipe transports.
2906 6. Added CONFIGURE_GROUP build-time option.
2908 7. Some older OS have a limit of 256 on the maximum number of file
2909 descriptors. Exim was using setrlimit() to set 1000 as a large value
2910 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2911 systems. I've change it so that if it can't get 1000, it tries for 256.
2913 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2914 was an oversight, and furthermore, ever since the addition of extra
2915 controls (e.g. 4.43/32), the checks on when to allow different forms of
2916 "control" were broken. There should now be diagnostics for all cases when a
2917 control that does not make sense is encountered.
2919 9. Added the /retain_sender option to "control=submission".
2921 10. $recipients is now available in the predata ACL (oversight).
2923 11. Tidy the search cache before the fork to do a delivery from a message
2924 received from the command line. Otherwise the child will trigger a lookup
2925 failure and thereby defer the delivery if it tries to use (for example) a
2926 cached ldap connection that the parent has called unbind on.
2928 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2929 of $address_data from the recipient verification was clobbered by the
2930 sender verification.
2932 13. The value of address_data from a sender verification is now available in
2933 $sender_address_data in subsequent conditions in the ACL statement.
2935 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2937 15. Added a new option "connect=<time>" to callout options, to set a different
2940 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2941 was its contents. (It was OK if the option was not defined at all.)
2943 17. A "Completed" log line is now written for messages that are removed from
2944 the spool by the -Mrm option.
2946 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2947 information about exactly what failed.
2949 19. Added -dd to debug only the daemon process.
2951 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2952 handles timeouts, both on the server side and network timeouts. Renamed the
2953 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2955 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2956 It is now set to "smtps".
2958 22. $host_address is now set to the target address during the checking of
2959 ignore_target_hosts.
2961 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2962 being passed; this would have caused $sender_host_name to have been used if
2963 matching the list had actually called for a host name (not very likely,
2964 since this list is usually IP addresses). A host name is now passed as
2967 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2968 code that specifies a non-restarting handler (typically sigaction() in
2969 modern systems) in an attempt to fix a rare and obscure crash bug.
2971 25. Narrowed the window for a race in the daemon that could cause it to ignore
2972 SIGCHLD signals. This is not a major problem, because they are used only to
2973 wake it up if nothing else does.
2975 26. A malformed maildirsize file could cause Exim to calculate negative values
2976 for the mailbox size or file count. Odd effects could occur as a result.
2977 The maildirsize information is now recalculated if the size or filecount
2980 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2981 support for a long time. Removed HAVE_SYS_VFS_H.
2983 28. Installed the latest version of exipick from John Jetmore.
2985 29. In an address list, if the pattern was not a regular expression, an empty
2986 subject address (from a bounce message) matched only if the pattern was an
2987 empty string. Non-empty patterns were not even tested. This was the wrong
2988 because it is perfectly reasonable to use an empty address as part of a
2989 database query. An empty address is now tested by patterns that are
2990 lookups. However, all the other forms of pattern expect the subject to
2991 contain a local part and a domain, and therefore, for them, an empty
2992 address still always fails if the pattern is not itself empty.
2994 30. Exim went into a mad DNS loop when attempting to do a callout where the
2995 host was specified on an smtp transport, and looking it up yielded more
2996 than one IP address.
2998 31. Re-factored the code for checking spool and log partition space into a
2999 function that finds that data and another that does the check. The former
3000 is then used to implement four new variables: $spool_space, $log_space,
3001 $spool_inodes, and $log_inodes.
3003 32. The RFC2047 encoding function was originally intended for short strings
3004 such as real names; it was not keeping to the 75-character limit for
3005 encoded words that the RFC imposes. It now respects the limit, and
3006 generates multiple encoded words if necessary. To be on the safe side, I
3007 have increased the buffer size for the ${rfc2047: expansion operator from
3010 33. It is now permitted to omit both strings after an "if" condition; if the
3011 condition is true, the result is "true". As before, when the second string
3012 is omitted, a false condition yields an empty string. This makes it less
3013 cumbersome to write custom ACL and router conditions.
3015 34. Failure to deliver a bounce message always caused it to be frozen, even if
3016 there was an errors_to setting on the router. The errors_to setting is now
3019 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3020 canonical form (fully expanded) before being placed in
3021 $sender_host_address.
3023 36. The table in the code that translates DNS record types into text (T_A to
3024 "A" for instance) was missing entries for NS and CNAME. It is just possible
3025 that this could have caused confusion if both these types were looked up
3026 for the same domain, because the text type is used as part of Exim's
3027 per-process caching. But the chance of anyone hitting this buglet seems
3030 37. The dnsdb lookup has been extended in a number of ways.
3032 (1) There is a new type, "zns", which walks up the domain tree until it
3033 finds some nameserver records. It should be used with care.
3035 (2) There is a new type, "mxh", which is like "mx" except that it returns
3036 just the host names, not the priorities.
3038 (3) It is now possible to give a list of domains (or IP addresses) to be
3039 looked up. The behaviour when one of the lookups defers can be
3040 controlled by a keyword.
3042 (4) It is now possible to specify the separator character for use when
3043 multiple records are returned.
3045 38. The dnslists ACL condition has been extended: it is now possible to supply
3046 a list of IP addresses and/or domains to be looked up in a particular DNS
3049 39. Added log_selector=+queue_time_overall.
3051 40. When running the queue in the test harness, wait just a tad after forking a
3052 delivery process, to get repeatability of debugging output.
3054 41. Include certificate and key file names in error message when GnuTLS fails
3055 to set them up, because the GnuTLS error message doesn't include the name
3056 of the failing file when there is a problem reading it.
3058 42. Allow both -bf and -bF in the same test run.
3060 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3062 44. The "Exiscan patch" is now merged into the mainline Exim source.
3064 45. Sometimes the final signoff response after QUIT could fail to get
3065 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3066 < 0 before doing a fflush(). This bug looks as though it goes back to the
3067 introduction of TLS in release 3.20, but "sometimes" must have been rare
3068 because the tests only now provoked it.
3070 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3071 (this can affect the format of dates).
3073 47. exim_tidydb, when checking for the continued existence of a message for
3074 which it has found a message-specific retry record, was not finding
3075 messages that were in split spool directories. Consequently, it was
3076 deleting retry records that should have stayed in existence.
3078 48. Steve fixed some bugs in eximstats.
3080 49. The SPA authentication driver was not abandoning authentication and moving
3081 on to the next authenticator when an expansion was forced to fail,
3082 contradicting the general specification for all authenticators. Instead it
3083 was generating a temporary error. It now behaves as specified.
3085 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3086 (the order specifies the preference for clients). The order is now AES256,
3087 AES128, 3DES, ARCFOUR128.
3089 51. Small patch to Sieve code - explicitly set From: when generating an
3092 52. Exim crashed if a remote delivery caused a very long error message to be
3093 recorded - for instance if somebody sent an entire SpamAssassin report back
3094 as a large number of 550 error lines. This bug was coincidentally fixed by
3095 increasing the size of one of Exim's internal buffers (big_buffer) that
3096 happened as part of the Exiscan merge. However, to be on the safe side, I
3097 have made the code more robust (and fixed the comments that describe what
3100 53. Now that there can be additional text after "Completed" in log lines (if
3101 the queue_time_overall log selector is set), a one-byte patch to exigrep
3102 was needed to allow it to recognize "Completed" as not the last thing in
3105 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3106 patch that reportedly fixes this has been added. I am not expert enough to
3107 create a test for it. This is what the patch creator wrote:
3109 "I found a little strange behaviour of ldap code when working with
3110 Windows 2003 AD Domain, where users was placed in more than one
3111 Organization Units. When I tried to give exim partial DN, the exit code
3112 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3113 But simultaneously result of request was absolutely normal ldap result,
3114 so I produce this patch..."
3116 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3117 REFERENCE, so I have modified the code to exclude the patch when that macro
3120 55. Some experimental protocols are using DNS PTR records for new purposes. The
3121 keys for these records are domain names, not reversed IP addresses. The
3122 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3123 leaves it alone. Component reversal etc. now happens only for IP addresses.
3126 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3128 57. Double the size of the debug message buffer (to 2048) so that more of very
3129 long debug lines gets shown.
3131 58. The exicyclog utility now does better if the number of log files to keep
3132 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3134 59. Two changes related to the smtp_active_hostname option:
3136 (1) $smtp_active_hostname is now available as a variable.
3137 (2) The default for smtp_banner uses $smtp_active_hostname instead
3138 of $primary_hostname.
3140 60. The host_aton() function is supposed to be passed a string that is known
3141 to be a valid IP address. However, in the case of IPv6 addresses, it was
3142 not checking this. This is a hostage to fortune. Exim now panics and dies
3143 if the condition is not met. A case was found where this could be provoked
3144 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3145 components; fortuitously, this particular loophole had already been fixed
3146 by change 4.50/55 above.
3148 If there are any other similar loopholes, the new check in host_aton()
3149 itself should stop them being exploited. The report I received stated that
3150 data on the command line could provoke the exploit when Exim was running as
3151 exim, but did not say which command line option was involved. All I could
3152 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3153 running as the user.
3156 61. There was a buffer overflow vulnerability in the SPA authentication code
3157 (which came originally from the Samba project). I have added a test to the
3158 spa_base64_to_bits() function which I hope fixes it.
3161 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3162 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3164 63. The daemon start-up calls getloadavg() while still root for those OS that
3165 need the first call to be done as root, but it missed one case: when
3166 deliver_queue_load_max is set with deliver_drop_privilege. This is
3167 necessary for the benefit of the queue runner, because there is no re-exec
3168 when deliver_drop_privilege is set.
3170 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3171 This has been fixed.
3173 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3174 was in use, was not putting the data itself into the right store pool;
3175 consequently, it could be overwritten for a subsequent message in the same
3176 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3179 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3181 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3182 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3183 the function were treating the return as a boolean value, which happened to
3184 work because 0=false and not-0=true, but is not correct code.
3186 68. The host_aton() function was not handling scoped IPv6 addresses (those
3187 with, for example, "%eth0" on the end) correctly.
3189 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3190 negated items (that is, ~something) in unsigned ints. Some compilers
3191 apparently mutter when there is no cast.
3193 70. If an address verification called from an ACL failed, and did not produce a
3194 user-specific message (i.e. there was only a "system" message), nothing was
3195 put in $acl_verify_message. In this situation, it now puts the system
3198 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3199 session; change 4.31/43 added the unwanted input to the log line - except
3200 that it did not do this in the start of session case. It now does.
3202 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3203 This is wrong and can cause the other end to generate a synchronization
3204 error if it is another Exim or anything else that does the synchronization
3205 check. A QUIT command is no longer sent after a timeout.
3207 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3208 during host lookups.
3210 74. The defer_ok option of callout verification was not working if it was used
3211 when verifying addresses in header lines, that is, for this case:
3213 verify = header_sender/callout=defer_ok
3215 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3216 those file descriptors could be used for SMTP connections. If anything
3217 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3218 could be sent to the SMTP client, causing chaos. The daemon now opens
3219 stdin, stdout, and stderr to /dev/null when it puts itself into the
3222 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3223 log by default. The user can override this with suitable Perl magic.
3225 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3226 the log message when discard triggers, was not working for the DATA ACL or
3227 for the non-SMTP ACL.
3229 78. Error message wording change in sieve.c.
3231 79. If smtp_accept_max_per_host was set, the number of connections could be
3232 restricted to fewer than expected, because the daemon was trying to set up
3233 a new connection before checking whether the processes handling previous
3234 connections had finished. The check for completed processes is now done
3235 earlier. On busy systems, this bug wouldn't be noticed because something
3236 else would have woken the daemon, and it would have reaped the completed
3239 80. If a message was submitted locally by a user whose login name contained one
3240 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3241 It caused a spool format error. I have fixed the spool reading code. A
3242 related problem was that the "from" clause in the Received: line became
3243 illegal because of the space(s). It is now covered by ${quote_local_part.
3245 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3248 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3250 83. Patch from Sieve maintainer to fix unterminated string problem in
3251 "vacation" handling.
3253 84. Some minor changes to the Linux configuration files to help with other
3254 OS variants using glibc.
3256 85. One more patch for Sieve to update vacation handling to latest spec.
3259 ----------------------------------------------------
3260 See the note above about the 4.44 and 4.50 releases.
3261 ----------------------------------------------------
3267 1. Change 4.43/35 introduced a bug that caused file counts to be
3268 incorrectly computed when quota_filecount was set in an appendfile
3271 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3272 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3275 3. Give more explanation in the error message when the command for a transport
3276 filter fails to execute.
3278 4. There are several places where Exim runs a non-Exim command in a
3279 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3280 was being done only for the command run by the queryprogram router. It is
3281 now done for all such subprocesses. The other cases are: ${run, transport
3282 filters, and the commands run by the lmtp and pipe transports.
3284 5. Some older OS have a limit of 256 on the maximum number of file
3285 descriptors. Exim was using setrlimit() to set 1000 as a large value
3286 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3287 systems. I've change it so that if it can't get 1000, it tries for 256.
3289 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3290 was an oversight, and furthermore, ever since the addition of extra
3291 controls (e.g. 4.43/32), the checks on when to allow different forms of
3292 "control" were broken. There should now be diagnostics for all cases when a
3293 control that does not make sense is encountered.
3295 7. $recipients is now available in the predata ACL (oversight).
3297 8. Tidy the search cache before the fork to do a delivery from a message
3298 received from the command line. Otherwise the child will trigger a lookup
3299 failure and thereby defer the delivery if it tries to use (for example) a
3300 cached ldap connection that the parent has called unbind on.
3302 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3303 of $address_data from the recipient verification was clobbered by the
3304 sender verification.
3306 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3307 was its contents. (It was OK if the option was not defined at all.)
3309 11. A "Completed" log line is now written for messages that are removed from
3310 the spool by the -Mrm option.
3312 12. $host_address is now set to the target address during the checking of
3313 ignore_target_hosts.
3315 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3316 being passed; this would have caused $sender_host_name to have been used if
3317 matching the list had actually called for a host name (not very likely,
3318 since this list is usually IP addresses). A host name is now passed as
3321 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3322 code that specifies a non-restarting handler (typically sigaction() in
3323 modern systems) in an attempt to fix a rare and obscure crash bug.
3325 15. Narrowed the window for a race in the daemon that could cause it to ignore
3326 SIGCHLD signals. This is not a major problem, because they are used only to
3327 wake it up if nothing else does.
3329 16. A malformed maildirsize file could cause Exim to calculate negative values
3330 for the mailbox size or file count. Odd effects could occur as a result.
3331 The maildirsize information is now recalculated if the size or filecount
3334 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3335 support for a long time. Removed HAVE_SYS_VFS_H.
3337 18. Updated exipick to current release from John Jetmore.
3339 19. Allow an empty sender to be matched against a lookup in an address list.
3340 Previously the only cases considered were a regular expression, or an
3343 20. Exim went into a mad DNS lookup loop when doing a callout where the
3344 host was specified on the transport, if the DNS lookup yielded more than
3347 21. The RFC2047 encoding function was originally intended for short strings
3348 such as real names; it was not keeping to the 75-character limit for
3349 encoded words that the RFC imposes. It now respects the limit, and
3350 generates multiple encoded words if necessary. To be on the safe side, I
3351 have increased the buffer size for the ${rfc2047: expansion operator from
3354 22. Failure to deliver a bounce message always caused it to be frozen, even if
3355 there was an errors_to setting on the router. The errors_to setting is now
3358 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3359 canonical form (fully expanded) before being placed in
3360 $sender_host_address.
3362 24. Updated eximstats to version 1.33
3364 25. Include certificate and key file names in error message when GnuTLS fails
3365 to set them up, because the GnuTLS error message doesn't include the name
3366 of the failing file when there is a problem reading it.
3368 26. Expand error message when OpenSSL has problems setting up cert/key files.
3371 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3372 (this can affect the format of dates).
3374 28. exim_tidydb, when checking for the continued existence of a message for
3375 which it has found a message-specific retry record, was not finding
3376 messages that were in split spool directories. Consequently, it was
3377 deleting retry records that should have stayed in existence.
3379 29. eximstats updated to version 1.35
3380 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3381 1.35 - bugfix such that pie charts by volume are generated correctly
3383 30. The SPA authentication driver was not abandoning authentication and moving
3384 on to the next authenticator when an expansion was forced to fail,
3385 contradicting the general specification for all authenticators. Instead it
3386 was generating a temporary error. It now behaves as specified.
3388 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3389 (the order specifies the preference for clients). The order is now AES256,
3390 AES128, 3DES, ARCFOUR128.
3392 31. Small patch to Sieve code - explicitly set From: when generating an
3395 32. Exim crashed if a remote delivery caused a very long error message to be
3396 recorded - for instance if somebody sent an entire SpamAssassin report back
3397 as a large number of 550 error lines. This bug was coincidentally fixed by
3398 increasing the size of one of Exim's internal buffers (big_buffer) that
3399 happened as part of the Exiscan merge. However, to be on the safe side, I
3400 have made the code more robust (and fixed the comments that describe what
3403 33. Some experimental protocols are using DNS PTR records for new purposes. The
3404 keys for these records are domain names, not reversed IP addresses. The
3405 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3406 leaves it alone. Component reversal etc. now happens only for IP addresses.
3409 34. The host_aton() function is supposed to be passed a string that is known
3410 to be a valid IP address. However, in the case of IPv6 addresses, it was
3411 not checking this. This is a hostage to fortune. Exim now panics and dies
3412 if the condition is not met. A case was found where this could be provoked
3413 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3414 components; fortuitously, this particular loophole had already been fixed
3415 by change 4.50/55 or 4.44/33 above.
3417 If there are any other similar loopholes, the new check in host_aton()
3418 itself should stop them being exploited. The report I received stated that
3419 data on the command line could provoke the exploit when Exim was running as
3420 exim, but did not say which command line option was involved. All I could
3421 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3422 running as the user.
3425 35. There was a buffer overflow vulnerability in the SPA authentication code
3426 (which came originally from the Samba project). I have added a test to the
3427 spa_base64_to_bits() function which I hope fixes it.
3430 36. The daemon start-up calls getloadavg() while still root for those OS that
3431 need the first call to be done as root, but it missed one case: when
3432 deliver_queue_load_max is set with deliver_drop_privilege. This is
3433 necessary for the benefit of the queue runner, because there is no re-exec
3434 when deliver_drop_privilege is set.
3436 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3437 was in use, was not putting the data itself into the right store pool;
3438 consequently, it could be overwritten for a subsequent message in the same
3439 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3442 38. Sometimes the final signoff response after QUIT could fail to get
3443 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3444 < 0 before doing a fflush(). This bug looks as though it goes back to the
3445 introduction of TLS in release 3.20, but "sometimes" must have been rare
3446 because the tests only now provoked it.
3452 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3453 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3454 Now it returns an integer. A number of calls were still expecting a T/F
3455 return. Fortuitously, in all cases, the tests worked in OK situations,
3456 which is the norm. However, things would have gone wrong on any write
3457 failures on the smtp file descriptor. This function is used when sending
3458 messages over SMTP and also when doing verify callouts.
3460 2. When Exim is called to do synchronous delivery of a locally submitted
3461 message (the -odf or -odi options), it no longer closes stderr before doing
3464 3. Implemented the mua_wrapper option.
3466 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3468 5. Implemented the functions header_remove(), header_testname(),
3469 header_add_at_position(), and receive_remove_recipient(), and exported them
3472 6. If an ACL "warn" statement specified the addition of headers, Exim already
3473 inserted X-ACL-Warn: at the start if there was no header name. However, it
3474 was not making this test for the second and subsequent header lines if
3475 there were newlines in the string. This meant that an invalid header could
3476 be inserted if Exim was badly configured.
3478 7. Allow an ACL "warn" statement to add header lines at the start or after all
3479 the Received: headers, as well as at the end.
3481 8. Added the rcpt_4xx retry error code.
3483 9. Added postmaster_mailfrom=xxx to callout verification option.
3485 10. Added mailfrom=xxxx to the callout verification option, for verify=
3488 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3489 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3491 12. Inserted some casts to stop certain compilers warning when using pointer
3492 differences as field lengths or precisions in printf-type calls (mostly
3493 affecting debugging statements).
3495 13. Added optional readline() support for -be (dynamically loaded).
3497 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3498 same clock tick as a message's arrival, so that its received time was the
3499 same as the "first fail" time on the retry record, and that message
3500 remained on the queue past the ultimate address timeout, every queue runner
3501 would try a delivery (because it was past the ultimate address timeout) but
3502 after another failure, the ultimate address timeout, which should have then
3503 bounced the address, did not kick in. This was a "< instead of <=" error;
3504 in most cases the first failure would have been in the next clock tick
3505 after the received time, and all would be well.
3507 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3508 being recognized when the domain list was tested by the match_domain
3509 condition in an expansion string.
3511 16. Added the ${str2b64: operator.
3513 17. Exim was always calling setrlimit() to set a large limit for the number of
3514 processes, without checking whether the existing limit was already
3515 adequate. (It did check for the limit on file descriptors.) Furthermore,
3516 errors from getrlimit() and setrlimit() were being ignored. Now they are
3517 logged to the main and panic logs, but Exim does carry on, to try to do its
3518 job under whatever limits there are.
3520 18. Imported PCRE 5.0.
3522 19. Trivial typo in log message " temporarily refused connection" (the leading
3525 20. If the log selector return_path_on_delivery was set and an address was
3526 redirected to /dev/null, the delivery process crashed because it assumed
3527 that a return path would always be set for a "successful" delivery. In this
3528 case, the whole delivery is bypassed as an optimization, and therefore no
3531 21. Internal re-arrangement: the function for sending a challenge and reading
3532 a response while authentication was assuming a zero-terminated challenge
3533 string. It's now changed to take a pointer and a length, to allow for
3534 binary data in such strings.
3536 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3538 23. Exim was not respecting finduser_retries when seeking the login of the
3539 uid under which it was called; it was always trying 10 times. (The default
3540 setting of finduser_retries is zero.) Also, it was sleeping after the final
3541 failure, which is pointless.
3543 24. Implemented tls_on_connect_ports.
3545 25. Implemented acl_smtp_predata.
3547 26. If the domain in control=submission is set empty, Exim assumes that the
3548 authenticated id is a complete email address when it generates From: or
3549 Sender: header lines.
3551 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3552 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3553 chown and chgrp in /bin and hostname in /usr/bin.
3555 28. Exim was keeping the "process log" file open after each use, just as it
3556 does for the main log. This opens the possibility of it remaining open for
3557 long periods when the USR1 signal hits a daemon. Occasional processlog
3558 errors were reported, that could have been caused by this. Anyway, it seems
3559 much more sensible not to leave this file open at all, so that is what now
3562 29. The long-running daemon process does not normally write to the log once it
3563 has entered its main loop, and it closes the log before doing so. This is
3564 so that log files can straightforwardly be renamed and moved. However,
3565 there are a couple of unusual error situations where the daemon does write
3566 log entries, and I had neglected to close the log afterwards.
3568 30. The text of an SMTP error response that was received during a remote
3569 delivery was being truncated at 512 bytes. This is too short for some of
3570 the long messages that one sometimes sees. I've increased the limit to
3573 31. It is now possible to make retry rules that apply only when a message has a
3574 specific sender, in particular, an empty sender.
3576 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3577 it possible to be selective about when SMTP synchronization is enforced.
3579 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3581 32. Implemented hosts_connection_nolog.
3583 33. Added an ACL for QUIT.
3585 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3588 35. Added mailbox_size and mailbox_filecount to appendfile.
3590 36. Added control = no_multiline_responses to ACLs.
3592 37. There was a bug in the logic of the code that waits for the clock to tick
3593 in the case where the clock went backwards by a substantial amount such
3594 that the microsecond fraction of "now" was more than the microsecond
3595 fraction of "then" (but the whole seconds number was less).
3597 38. Added support for the libradius Radius client library this is found on
3598 FreeBSD (previously only the radiusclient library was supported).
3604 1. When certain lookups returned multiple values in the form name=value, the
3605 quoting of the values was not always being done properly. Specifically:
3606 (a) If the value started with a double quote, but contained no whitespace,
3608 (b) If the value contained whitespace other than a space character (i.e.
3609 tabs or newlines or carriage returns) it was not quoted.
3610 This fix has been applied to the mysql and pgsql lookups by writing a
3611 separate quoting function and calling it from the lookup code. The fix
3612 should probably also be applied to nisplus, ibase and oracle lookups, but
3613 since I cannot test any of those, I have not disturbed their existing code.
3615 2. A hit in the callout cache for a specific address caused a log line with no
3616 reason for rejecting RCPT. Now it says "Previous (cached) callout
3617 verification failure".
3619 3. There was an off-by-one bug in the queryprogram router. An over-long
3620 return line was truncated at 256 instead of 255 characters, thereby
3621 overflowing its buffer with the terminating zero. As well as fixing this, I
3622 have increased the buffer size to 1024 (and made a note to document this).
3624 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3625 when Exim is waiting for an SMTP response from a remote server, Exim
3626 restarts its select() call on the socket, thereby resetting its timeout.
3627 This is not a problem when such interrupts are rare. Somebody set up a cron
3628 job to run exiwhat every 2 minutes, which is less than the normal select()
3629 timeout (5 or 10 minutes). This meant that the select() timeout never
3630 kicked in because it was always reset. I have fixed this by comparing the
3631 time when an interrupt arrives with the time at the start of the first call
3632 to select(). If more time than the timeout has elapsed, the interrupt is
3633 treated as a timeout.
3635 5. Some internal re-factoring in preparation for the addition of Sieve
3636 extensions (by MH). In particular, the "personal" test is moved to a
3637 separate function, and given an option for scanning Cc: and Bcc: (which is
3638 not set for Exim filters).
3640 6. When Exim created an email address using the login of the caller as the
3641 local part (e.g. when creating a From: or Sender: header line), it was not
3642 quoting the local part when it contained special characters such as @.
3644 7. Installed new OpenBSD configuration files.
3646 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3647 try to make them clearer.
3649 9. Callout options, other than the timeout value, were being ignored when
3650 verifying sender addresses in header lines. For example, when using
3652 verify = header_sender/callout=no_cache
3654 the cache was (incorrectly) being used.
3656 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3657 only the Cygwin environment.
3659 11. When return_path_on_delivery was set as a log selector, if different remote
3660 addresses in the same message used different return paths and parallel
3661 remote delivery occurred, the wrong values would sometimes be logged.
3662 (Whenever a remote delivery process finished, the return path value from
3663 the most recently started remote delivery process was logged.)
3665 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3666 lines when AUTH and/or TLS are in use. This is the "received protocol"
3667 field. Exim used to use "asmtp" for authenticated SMTP, without any
3668 indication (in the protocol name) for TLS use. Now it follows the RFC and
3669 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3670 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3671 names appear in log lines as well as in Received: header lines.
3673 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3674 extensions, and comparison tests, and to fix some bugs.
3676 14. Changes to the "personal" filter test:
3678 (1) The test was buggy in that it was just doing the equivalent of
3679 "contains" tests on header lines. For example, if a user's address was
3680 anne@some.where, the "personal" test would incorrectly be true for
3682 To: susanne@some.where
3684 This test is now done by extracting each address from the header in turn,
3685 and checking the entire address. Other tests that are part of "personal"
3686 are now done using regular expressions (for example, to check local parts
3687 of addresses in From: header lines).
3689 (2) The list of non-personal local parts in From: addresses has been
3690 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3691 taken from the Sieve specification recommendations.
3693 (3) If the message contains any header line starting with "List-" it is
3694 treated as non-personal.
3696 (4) The test for "circular" in the Subject: header line has been removed
3697 because it now seems ill-conceived.
3699 15. Minor typos in src/EDITME comments corrected.
3701 16. Installed latest exipick from John Jetmore.
3703 17. If headers_add on a router specified a text string that was too long for
3704 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3705 of string_sprintf() is now avoided.
3707 18. $message_body_size was not set (it was always zero) when running the DATA
3708 ACL and the local_scan() function.
3710 19. For the "mail" command in an Exim filter, no default was being set for
3711 the once_repeat time, causing a random time value to be used if "once" was
3712 specified. (If the value happened to be <= 0, no repeat happened.) The
3713 default is now 0s, meaning "never repeat". The "vacation" command was OK
3714 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3715 (I found it when inspecting the code).
3717 20. There is now an overall timeout for performing a callout verification. It
3718 defaults to 4 times the callout timeout, which applies to individual SMTP
3719 commands during the callout. The overall timeout applies when there is more
3720 than one host that can be tried. The timeout is checked before trying the
3721 next host. This prevents very long delays if there are a large number of
3722 hosts and all are timing out (e.g. when the network connections are timing
3723 out). The value of the overall timeout can be changed by specifying an
3724 additional sub-option for "callout", called "maxwait". For example:
3726 verify = sender/callout=5s,maxwait=20s
3728 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3729 to the end before writing, but this should make it even safer).
3731 22. Exim was forgetting that it had advertised PIPELINING for the second and
3732 subsequent messages on an SMTP connection. It was also not resetting its
3733 memory on STARTTLS and an internal HELO.
3735 23. When Exim logs an SMTP synchronization error within a session, it now
3736 records whether PIPELINING has been advertised or not.
3738 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3739 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3740 rather than long int.
3742 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3744 26. Added the never_mail option to autoreply.
3750 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3751 crash if the getsockname() call failed; this can happen if a connection is
3752 closed very soon after it is established. The problem was simply in the
3753 order in which certain operations were done, causing Exim to try to write
3754 to the SMTP stream before it had set up the file descriptor. The bug has
3755 been fixed by making things happen in the correct order.
3761 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3762 before the connection was closed, thus losing the rejection response.
3764 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3765 some early Solaris releases, but causes trouble in current releases where
3766 socklen_t is defined.
3768 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3771 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3774 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3775 that releasing the top of it at the end releases what was used for sub-
3776 expansions (unless the block got too big). However, discard this block if
3777 the first thing is a variable or header, so that we can use its block when
3778 it is dynamic (useful for very large $message_headers, for example).
3780 6. Lookups now cache *every* query, not just the most recent. A new, separate
3781 store pool is used for this. It can be recovered when all lookup caches are
3782 flushed. Lookups now release memory at the end of their result strings.
3783 This has involved some general refactoring of the lookup sources.
3785 7. Some code has been added to the store_xxx() functions to reduce the amount
3786 of flapping under certain conditions.
3788 8. log_incoming_interface used to affect only the <= reception log lines. Now
3789 it causes the local interface and port to be added to several more SMTP log
3790 lines, for example "SMTP connection from", and rejection lines.
3792 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3794 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3796 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3797 could be overwritten at the end of the current message (or the start of a
3798 new message if it was set in a HELO ACL). The value is now preserved for
3799 the duration of the SMTP connection.
3801 12. If a transport had a headers_rewrite setting, and a matching header line
3802 contained an unqualified address, that address was qualified, even if it
3803 did not match any rewriting rules. The underlying bug was that the values
3804 of the flags that permit the existence of unqualified sender and recipient
3805 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3806 non-local messages, and by -bnq for local messages) were not being
3807 preserved with the message after it was received.
3809 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3810 "next input=" as part of the text comprising the host identity instead of
3811 the correct text. The code was using the same buffer for two different
3812 strings. However, depending on which order the printing function evaluated
3813 its arguments, the bug did not always show up. Under Linux, for example, my
3814 test suite worked just fine.
3816 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3817 doesn't work with some older versions of Perl. It has been changed to "my",
3818 which in any case is probably the better facility to use.
3820 15. A really picky compiler found some instances of statements for creating
3821 error messages that either had too many or two few arguments for the format
3824 16. The size of the buffer for calls to the DNS resolver has been increased
3825 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3826 for addresses that have a lot of PTR records. This alleviates a problem; it
3827 does not fully solve it.
3829 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3830 buffer now truncates the list and logs the incident, which is the same
3831 action as happens when Exim is looking up a host name and its aliases.
3832 Previously in this situation something unpredictable would happen;
3833 sometimes it was "internal error: store_reset failed".
3835 18. If a server dropped the connection unexpectedly when an Exim client was
3836 using GnuTLS and trying to read a response, the client delivery process
3837 crashed while trying to generate an error log message.
3839 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3840 string, for example:
3842 warn message = H1: something\nH2: something
3844 the text was added as a single header line from Exim's point of view
3845 though it ended up OK in the delivered message. However, searching for the
3846 second and subsequent header lines using $h_h2: did not work. This has been
3847 fixed. Similarly, if a system filter added multiple headers in this way,
3848 the routers could not see them.
3850 20. Expanded the error message when iplsearch is called with an invalid key to
3851 suggest using net-iplsearch in a host list.
3853 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3854 ACLs are no longer actually imposed (and a message to that effect is
3857 22. If a "gecos" field in a passwd entry contained escaped characters, in
3858 particular, if it contained a \" sequence, Exim got it wrong when building
3859 a From: or a Sender: header from that name. A second bug also caused
3860 incorrect handling when an unquoted " was present following a character
3861 that needed quoting.
3863 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3864 was not being matched caselessly.
3866 24. Arranged for all hyphens in the exim.8 source to be escaped with
3869 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3870 properly. Recipient callout cache records were still being keyed to include
3871 the sender, even when use_sender was set false. This led to far more
3872 callouts that were necessary. The sender is no longer included in the key
3873 when use_sender is false.
3875 26. Added "control = submission" modifier to ACLs.
3877 27. Added the ${base62d: operator to decode base 62 numbers.
3879 28. dnsdb lookups can now access SRV records.
3881 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3882 the configuration file.
3884 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3885 (-v) mode. This makes the output for a verbose queue run more intelligible.
3887 31. Added a use_postmaster feature to recipient callouts.
3889 32. Added the $body_zerocount variable, containing the number of binary zero
3890 bytes in the message body.
3892 33. The time of last modification of the "new" subdirectory is now used as the
3893 "mailbox time last read" when there is a quota error for a maildir
3896 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3898 35. Added +ignore_unknown as a special item in host lists.
3900 36. Code for decoding IPv6 addresses in host lists is now included, even if
3901 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3902 address was recognized as an IP address, but was then not correctly decoded
3903 into binary, causing unexpected and incorrect effects when compared with
3910 1. Very minor rewording of debugging text in manualroute to say "list of
3911 hosts" instead of "hostlist".
3913 2. If verify=header_syntax was set, and a header line with an unqualified
3914 address (no domain) and a large number of spaces between the end of the
3915 name and the colon was received, the reception process suffered a buffer
3916 overflow, and (when I tested it) crashed. This was caused by some obsolete
3917 code that should have been removed. The fix is to remove it!
3919 3. When running in the test harness, delay a bit after writing a bounce
3920 message to get a bit more predictability in the log output.
3922 4. Added a call to search_tidyup() just before forking a reception process. In
3923 theory, someone could use a lookup in the expansion of smtp_accept_max_
3924 per_host which, without the tidyup, could leave open a database connection.
3926 5. Added the variables $recipient_data and $sender_data which get set from a
3927 lookup success in an ACL "recipients" or "senders" condition, or a router
3928 "senders" option, similar to $domain_data and $local_part_data.
3930 6. Moved the writing of debug_print from before to after the "senders" test
3933 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3934 problems for message scanning, either using a data ACL, or using
3935 local_scan() because the Received: header was not generated till after they
3936 were called (in order to set the time as the time of reception completion).
3937 I have revised the way this works. The header is now generated after the
3938 body is received, but before the ACL or local_scan() are called. After they
3939 are run, the timestamp in the header is updated.
3945 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3946 before starting a queue runner without re-exec. This happened only when
3947 deliver_drop_privilege was set or when the Exim user was set to root. The
3948 effect of the bug was that timeouts during subsequent deliveries caused
3949 crashes instead of being properly handled. The handler is now left at its
3950 default (and expected) setting.
3952 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3953 message, again when deliver_drop_privilege is set or Exim is run as root.
3954 The bug described in (1) was not present in this case, but the tidying up
3955 of the other signals was missing. I have made the two cases consistent.
3957 3. The ignore_target_hosts setting on a manualroute router was being ignored
3958 for hosts that were looked up using the /MX notation.
3960 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3963 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3964 operated on the sender address. After changing the $sender_address to <>
3965 for the sender address verify, Exim was re-instated it as the original
3966 (before rewriting) address, but remembering that it had rewritten it, so it
3967 wasn't rewriting it again. This bug also had the effect of breaking the
3968 sender address verification caching when the sender address was rewritten.
3970 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3971 This has been changed so that if the ip literal address matches
3972 ignore_target_hosts, the router declines.
3974 7. Added expansion conditions match_domain, match_address, and match_local_
3975 part (NOT match_host).
3977 8. The placeholder for the Received: header didn't have a length field set.
3979 9. Added code to Exim itself and to exim_lock to test for a specific race
3980 condition that could lead to file corruption when using MBX delivery. The
3981 issue is with the lockfile that is created in /tmp. If this file is removed
3982 after a process has opened it but before that process has acquired a lock,
3983 there is the potential for a second process to recreate the file and also
3984 acquire a lock. This could lead to two Exim processes writing to the file
3985 at the same time. The added code performs the same test as UW imapd; it
3986 checks after acquiring the lock that its file descriptor still refers to
3987 the same named file.
3989 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3990 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3993 11. Added the smtp_active_hostname option. If used, this will typically be made
3994 to depend on the incoming interface address. Because $interface_address is
3995 not set up until the daemon has forked a reception process, error responses
3996 that can happen earlier (such as "too many connections") no longer contain
3999 12. If an expansion in a condition on a "warn" statement fails because a lookup
4000 defers, the "warn" statement is abandoned, and the next ACL statement is
4001 processed. Previously this caused the whole ACL to be aborted.
4003 13. Added the iplsearch lookup type.
4005 14. Added ident_timeout as a log selector.
4007 15. Added tls_certificate_verified as a log selector.
4009 16. Added a global option tls_require_ciphers (compare the smtp transport
4010 option of the same name). This controls incoming TLS connections.
4012 17. I finally figured out how to make tls_require_ciphers do a similar thing
4013 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4014 before starting the TLS session.
4016 18. Tabs are now shown as \t in -bP output.
4018 19. If the log selector return_path_on_delivery was set, Exim crashed when
4019 bouncing a message because it had too many Received: header lines.
4021 20. If two routers both had headers_remove settings, and the first one included
4022 a superfluous trailing colon, the final name in the first list and the
4023 first name in the second list were incorrectly joined into one item (with a
4024 colon in the middle).
4030 1. Added -C and -D options to the exinext utility, mainly to make it easier
4031 to include in the automated testing, but these could be helpful when
4032 multiple configurations are in use.
4034 2. The exinext utility was not formatting the output nicely when there was
4035 an alternate port involved in the retry record key, nor when there was a
4036 message id as well (for retries that were specific to a specific message
4037 and a specific host). It was also confused by IPv6 addresses, because of
4038 the additional colons they contain. I have fixed the IPv4 problem, and
4039 patched it up to do a reasonable job for IPv6.
4041 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4042 delivery, the log line now contains "pipelined" if PIPELINING was used.
4044 4. An SMTP transport process used to panic and die if the bind() call to set
4045 an explicit outgoing interface failed. This has been changed; it is now
4046 treated in the same way as a connect() failure.
4048 5. A reference to $sender_host_name in the part of a conditional expansion
4049 that was being skipped was still causing a DNS lookup. This no longer
4052 6. The def: expansion condition was not recognizing references to header lines
4053 that used bh_ and bheader_.
4055 7. Added the _cache feature to named lists.
4057 8. The code for checking quota_filecount in the appendfile transport was
4058 allowing one more file than it should have been.
4060 9. For compatibility with Sendmail, the command line option
4068 and sets the incoming protocol and host name (for trusted callers). The
4069 host name and its colon can be omitted when only the protocol is to be set.
4070 Note the Exim already has two private options, -pd and -ps, that refer to
4071 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4072 "s", but I don't think that's a major issue.
4074 10. A number of refactoring changes to the code, none of which should affect
4077 (a) The number of logging options was getting close to filling up the
4078 32-bit word that was used as a bit map. I have split them into two classes:
4079 those that are passed in the argument to log_write(), and those that are
4080 only ever tested independently outside of that function. These are now in
4081 separate 32-bit words, so there is plenty of room for expansion again.
4082 There is no change in the user interface or the logging behaviour.
4084 (b) When building, for example, log lines, the code previously used a
4085 macro that called string_cat() twice, in order to add two strings. This is
4086 not really sufficiently general. Furthermore, there was one instance where
4087 it was actually wrong because one of the argument was used twice, and in
4088 one call a function was used. (As it happened, calling the function twice
4089 did not affect the overall behaviour.) The macro has been replaced by a
4090 function that can join an arbitrary number of extra strings onto a growing
4093 (c) The code for expansion conditions now uses a table and a binary chop
4094 instead of a serial search (which was left over from when there were very
4095 few conditions). Also, it now recognizes conditions like "pam" even when
4096 the relevant support is not compiled in: a suitably worded error message is
4097 given if an attempt is made to use such a condition.
4099 11. Added ${time_interval:xxxxx}.
4101 12. A bug was causing one of the ddress fields not to be passed back correctly
4102 from remote delivery subprocesses. The field in question was not being
4103 subsequently used, so this caused to problems in practice.
4105 13. Added new log selectors queue_time and deliver_time.
4107 14. Might have fixed a bug in maildirsizefile handling that threw up
4108 "unexpected character" debug warnings, and recalculated the data
4109 unnecessarily. In any case, I expanded the warning message to give more
4112 15. Added the message "Restricted characters in address" to the statements in
4113 the default ACL that block characters like @ and % in local parts.
4115 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4116 Three changes have been made:
4118 (a) There was a serious bug; a negative response to MAIL caused the whole
4119 recipient domain to be cached as invalid, thereby blocking all messages
4120 to all local parts at the same domain, from all senders. This bug has
4121 been fixed. The domain is no longer cached after a negative response to
4122 MAIL if the sender used is not empty.
4124 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4127 (c) A new callout option, "use_sender" has been added for people who want
4128 the modified behaviour.
4134 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4137 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4138 indeed breaks things for older releases.
4140 3. Added additional logging to the case where there is a problem reading data
4141 from a filter that is running in a subprocess using a pipe, in order to
4142 try to track down a specific problem.
4144 4. Testing facility fudge: when running in the test harness and attempting
4145 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4146 getting "No route to host". Convert this to a timeout.
4148 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4151 6. Some OS don't have socklen_t but use size_t instead. This affects the
4152 fifth argument of getsockopt() amongst other things. This is now
4153 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4154 can be set for individual OS. I have set it for SunOS5, OSF1, and
4155 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4156 some earlier ones do not.
4158 7. Change 4.30/15 was not doing the test caselessly.
4160 8. The standard form for an IPv6 address literal was being rejected by address
4161 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4162 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4163 this, as well as the form without the "IPv6" on the front (but only when
4164 address literals are enabled, of course).
4166 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4168 10. Exim crashed if a message with an empty sender address specified by -f
4169 encountered a router with an errors_to setting. This could be provoked only
4170 by a command such as
4174 where an empty string was supplied; "<>" did not hit this bug.
4176 11. Installed PCRE release 4.5.
4178 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4179 remained set. It is now erased.
4181 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4182 times from message ids (which are base 36 rather than the normal 62).
4184 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4185 were being counted as actual protocol errors, and logged if the log
4186 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4187 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4188 and DATA following a set of rejected RCPTs do not count as protocol errors.
4189 In other words, Exim assumes they were pipelined, though this may not
4190 actually be the case. Of course, in all cases the client gets an
4191 appropriate error code.
4193 15. If a lookup fails in an ACL condition, a message about the failure may
4194 be available; it is used if testing the ACL cannot continue, because most
4195 such messages specify what the cause of the deferral is. However, some
4196 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4197 that caused an old message to be retained and used if a later statement
4198 caused a defer, replacing the real cause of the deferral.
4200 16. If an IP address had so many PTR records that the DNS lookup buffer
4201 was not large enough to hold them, Exim could crash while trying to process
4202 the truncated data. It now detects and logs this case.
4204 17. Further to 4.21/58, another change has been made: if (and only if) the
4205 first line of a message (the first header line) ends with CRLF, a bare LF
4206 in a subsequent header line has a space inserted after it, so as not to
4207 terminate the header.
4209 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4210 unnecessarily, used atoi() instead of strtol(), and didn't check the
4211 termination when getting file sizes from file names by regex.
4213 19. Completely re-implemented the support for maildirsize files, in the light
4214 of a number of problems with the previous contributed implementation
4215 (4.30/29). In particular:
4217 . If the quota is zero, the maildirsize file is maintained, but no quota is
4220 . If the maildir directory does not exist, it is created before any attempt
4221 to write a maildirsize file.
4223 . The quota value in the file is just a cache; if the quota is changed in
4224 the transport, the new value overrides.
4226 . A regular expression is available for excluding directories from the
4229 20. The autoreply transport checks the characters in options that define the
4230 message's headers; it allows continued headers, but it was checking with
4231 isspace() after an embedded newline instead of explicitly looking for a
4234 21. If all the "regular" hosts to which an address was routed had passed their
4235 expiry times, and had not reached their retry times, the address was
4236 bounced, even if fallback hosts were defined. Now Exim should go on to try
4239 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4240 equivalent code in the SMTP transport. Some hosts send humungous responses
4241 to HELO/EHLO, more than 1024 it seems.
4243 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4244 gives compiler warnings in some environments. I've now done it "properly",
4247 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4248 (because of problems with the built-in one) was declared to return uschar *
4249 instead of char *, causing compiler failure.
4251 25. Fixed a file descriptor leak when processing alias/forward files.
4253 26. Fixed a minor format string issue in dbfn.c.
4255 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4257 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4258 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4261 29. When a sender address is verified, it is cached, to save repeating the test
4262 when there is more than one recipient in a message. However, when the
4263 verification involves a callout, it is possible for different callout
4264 options to be set for different recipients. It is too complicated to keep
4265 track of this in the cache, so now Exim always runs a verification when a
4266 callout is required, relying on the callout cache for the optimization.
4267 The overhead is duplication of the address routing, but this should not be
4270 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4271 to be verified with callout=postmaster, and the main callout worked but the
4272 postmaster check failed, the verification correctly failed. However, if a
4273 subsequent RCPT command asked for sender verification *without* the
4274 postmaster check, incorrect caching caused this verification also to fail,
4277 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4278 it was not caching the DNS options (qualify_single, search_parents) that
4279 were used when the lookup failed. A subsequent lookup with different
4280 options therefore always gave the same answer, though there were cases
4281 where it should not have. (Example: a "domains = !$mx_any" option on a
4282 dnslookup router: the "domains" option is always processed without any
4283 widening, but the router might have qualify_single set.) Now Exim uses the
4284 cached value only when the same options are set.
4286 32. Added John Jetmore's "exipick" utility to the distribution.
4288 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4289 than a timeout (e.g. a certificate is required, and is not provided), an
4290 Exim server now closes the connection immediately. Previously it waited for
4291 the client to close - but if the client is SSL, it seems that they each
4292 wait for each other, leading to a delay before one of them times out.
4294 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4295 maintained 0.8.x compatibility because I don't think many are using it, and
4296 it is clearly obsolete.
4298 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4301 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4302 client certificate was expired. A simple patch fixes this, though I don't
4303 understand the full logic of why the verify callback is called multiple
4306 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4307 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4308 which causes problems with some clients (such as the Certicom SSL Plus
4309 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4310 disables the coutermeasure allowing Eudora to connect."
4312 38. Exim was not checking that a write() to a log file succeeded. This could
4313 lead to Bad Things if a log got too big, in particular if it hit a file
4314 size limit. Exim now panics and dies if it cannot write to a log file, just
4315 as it does if it cannot open a log file.
4317 39. Modified OS/Makefile-Linux so that it now contains
4319 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4321 The two -D definitions ensure that Exim is compiled with large file
4322 support, which makes it possible to handle log files that are bigger than
4325 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4326 instance) a domain was checked against a named list that involved a lookup,
4327 causing $domain_data to be set, then another domain was checked against the
4328 same list, then the first domain was re-checked, the value of $domain_data
4329 after the final check could be wrong. In particular, if the second check
4330 failed, it could be set empty. This bug probably also applied to
4333 41. The strip_trailing_dot option was not being applied to the address given
4334 with the -f command-line option.
4336 42. The code for reading a message's header from the spool was incrementing
4337 $received_count, but never initializing it. This meant that the value was
4338 incorrect (doubled) while delivering a message in the same process in which
4339 it was received. In the most common configuration of Exim, this never
4340 happens - a fresh exec is done - but it can happen when
4341 deliver_drop_privilege is set.
4343 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4344 it now includes up to 150 characters of the unexpected data in the log
4347 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4348 and building data strings. The size of both of these buffers was 10 000
4349 bytes - far larger than anybody would *ever* want, thought I. Needless to
4350 say, somebody hit the limit. I have increased the maximum line length to
4351 20 000 and the maximum data length of concatenated lines to 100 000. I have
4352 also fixed two bugs, because there was no checking on these buffers. Tsk,
4353 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4354 buffer is too small.
4356 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4357 lsearch lookups. Now it does.
4359 46. When parsing a route_list item in a manualroute router, a fixed-length
4360 buffer was used for the list of hosts. I made this 1024 bytes long,
4361 thinking that nobody would ever have a list of hosts that long. Wrong.
4362 Somebody had a whole pile of complicated expansion conditions, and the
4363 string was silently truncated, leading to an expansion error. It turns out
4364 that it is easier to change to an unlimited length (owing to other changes
4365 that have happened since this code was originally written) than to build
4366 structure for giving a limitation error. The length of the item that
4367 expands into the list of hosts is now unlimited.
4369 47. The lsearch lookup could not handle data where the length of text line was
4370 more than 4095 characters. Such lines were truncated, leading to shortened
4371 data being returned. It should now handle lines of any length.
4373 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4374 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4377 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4378 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4379 no longer happens in comment lines. A list of replacements is now placed
4380 at the head of all of the source files, except those whose only change is
4381 to replace PERL_COMMAND in the very first #! line.
4383 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4384 messages on the queue, with a bottom-up merge sort, using code contributed
4385 by Michael Haardt. This should make operations like -bp somewhat faster on
4386 large queues. It won't affect queue runners, except when queue_run_in_order
4389 51. Installed eximstats 1.31 in the distribution.
4391 52. Added support for SRV lookups to the dnslookup router.
4393 53. If an ACL referred to $message_body or $message_body_end, the value was not
4394 reset for any messages that followed in the same SMTP session.
4396 54. The store-handling optimization for building very long strings was not
4397 differentiating between the different store pools. I don't think this
4398 actually made any difference in practice, but I've tidied it.
4400 55. While running the routers to verify a sender address, $sender_address
4401 was still set to the sender address. This is wrong, because when routing to
4402 send a bounce to the sender, it would be empty. Therefore, I have changed
4403 it so that, while verifying a sender address, $sender_address is set to <>.
4404 (There is no change to what happens when verifying a recipient address.)
4406 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4407 target A or AAAA records (if not already returned) without resetting the
4408 qualify_single or search_parents options of the DNS resolver. These are
4409 inappropriate in this case because the targets of MX and SRV records must
4410 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4411 target that, when qualified, matched something in the local domain. These
4412 two options are now turned off when doing these lookups.
4414 57. It seems that at least some releases of Reiserfs (which does not have the
4415 concept of a fixed number of inodes) returns zero and not -1 for the
4416 number of available inodes. This interacted badly with check_spool_inodes,
4417 which assumed that -1 was the "no such thing" setting. What I have done is
4418 to check that the total number of inodes is greater than zero before doing
4419 the test of how many are available.
4421 58. When a "warn" ACL statement has a log_message modifier, the message is
4422 remembered, and not repeated. This is to avoid a lot of repetition when a
4423 message has many recipients that cause the same warning to be written.
4424 Howewer, Exim was preserving the list of already written lines for an
4425 entire SMTP session, which doesn't seem right. The memory is now reset if a
4426 new message is started.
4428 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4429 debugging output unless log_rewrite was also set.
4431 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4432 of (int)(handle) when we know that handle contains (void *)(-1).
4434 61. The Exim daemon panic-logs an error return when it closes the incoming
4435 connection. However "connection reset by peer" seems to be common, and
4436 isn't really an error worthy of noting specially, so that particular error
4439 62. When Exim is trying to find all the local interfaces, it used to panic and
4440 die if the ioctl to get the interface flags failed. However, it seems that
4441 on at least one OS (Solaris 9) it is possible to have an interface that is
4442 included in the list of interfaces, but for which you get a failure error
4443 for this call. This happens when the interface is not "plumbed" into a
4444 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4445 failure of the "get flags" call assumes that the interface is down.
4447 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4448 makes life easier for people who are doing arithmetic on fields extracted
4449 from dates, where you often get leading zeros that should not be
4450 interpreted as octal.
4452 64. Added qualify_domain to the redirect router, to override the global
4455 65. If a pathologically long header line contained very many addresses (the
4456 report of this problem mentioned 10 000) and each of them was rewritten,
4457 Exim could use up a very large amount of memory. (It kept on making new
4458 copies of the header line as it rewrote, and never released the old ones.)
4459 At the expense of a bit more processing, the header rewriting function has
4460 been changed so that it no longer eats memory in this way.
4462 66. The generation of the Received: header has been moved from the time that a
4463 message starts to be received, to the time that it finishes. The timestamp
4464 in the Received: header should now be very close to that of the <= log
4465 line. There are two side-effects of this change:
4467 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4468 logged header lines no longer include the local Received: line, because
4469 it has not yet been created. The same applies to a copy of the message
4470 that is returned to a non-SMTP sender when a message is rejected.
4472 (b) When a filter file is tested using -bf, no additional Received: header
4473 is added to the test message. After some thought, I decided that this
4476 This change does not affect the value of $received_for. It is still set
4477 after address rewriting, but before local_scan() is called.
4479 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4481 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4482 gave an unhelpful panic error message, and a defer error. I have managed to
4483 change this behaviour so that it now rejects any supplied certificate,
4484 which seems right, as the list of acceptable certificates is empty.
4486 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4487 gave an unhelpful defer error. I have not managed to make this reject any
4488 supplied certificates, but the error message it gives is "no certificate
4489 supplied", which is not helpful.
4491 70. exigrep's output now also includes lines that are not associated with any
4492 message, but which match the given pattern. Implemented by a patch from
4493 Martin Sluka, which also tidied up the Perl a bit.
4495 71. Recipient callout verification, like sender verification, was using <> in
4496 the MAIL FROM command. This isn't really the right thing, since the actual
4497 sender may affect whether the remote host accepts the recipient or not. I
4498 have changed it to use the actual sender in the callout; this means that
4499 the cache record is now keyed on a recipient/sender pair, not just the
4500 recipient address. There doesn't seem to be a real danger of callout loops,
4501 since a callout by the remote host to check the sender would use <>.
4502 [SEE ABOVE: changed after hitting problems.]
4504 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4505 temporary errors. However, in the case of such a code being given after
4506 the end of a data transmission (i.e. after ".") Exim was failing to write
4507 a retry record for the message. (Yes, there was some broken host that was
4508 actually sending 8xx at this point.)
4510 73. An unknown lookup type in a host list could cause Exim to panic-die when
4511 the list was checked. (An example that provoked this was putting <; in the
4512 middle of a list instead of at the start.) If this happened during a DATA
4513 ACL check, a -D file could be left lying around. This kind of configuration
4514 error no longer causes Exim to die; instead it causes a defer errror. The
4515 incident is still logged to the main and panic logs.
4517 74. Buglet left over from Exim 3 conversion. The message "too many messages
4518 in one connection" was written to the rejectlog but not the mainlog, except
4519 when address rewriting (yes!) was being logged.
4521 75. Added write_rejectlog option.
4523 76. When a system filter was run not as root (that is, when system_filter_user
4524 was set), the values of the $n variables were not being returned to the
4525 main process; thus, they were not subsequently available in the $sn
4528 77. Added +return_path_on_delivery log selector.
4530 78. A connection timeout was being treated differently from recipients deferred
4531 when testing hosts_max_try with a message that was older than the host's
4532 retry timeout. (The host should not be counted, thus allowing all hosts to
4533 be tried at least once before bouncing.) This may have been the cause of an
4534 occasionally reported bug whereby a message would remain on the queue
4535 longer than the retry timeout, but would be bounced if a delivery was
4536 forced. I say "may" because I never totally pinned down the problem;
4537 setting up timeout/retry tests is difficult. See also the next item.
4539 79. The ultimate address timeout was not being applied to errors that involved
4540 a combination of host plus message (for example, a timeout on a MAIL
4541 command). When an address resolved to a number of possible hosts, and they
4542 were not all tried for each delivery (e.g. because of hosts_max_try), a
4543 message could remain on the queue longer than the retry timeout.
4545 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4548 81. Fixed an obscure SMTP outgoing bug which required at least the following
4549 conditions: (a) there was another message waiting for the same server;
4550 (b) the server returned 5xx to all RCPT commands in the first message so
4551 that the message was not completed; (c) the server dropped the connection
4552 or gave a negative response to the RSET that Exim sends to abort the
4553 transaction. The observed case was a dropped connection after DATA that had
4554 been sent in pipelining mode. That is, the server had advertised PIPELINING
4555 but was not implementing it correctly. The effect of the bug was incorrect
4556 behaviour, such as trying another host, and this could lead to a crash.
4562 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4563 and daemon.c were passed as pointers to ints; they should have been
4564 pointers to socklen_t variables (which are typically unsigned ints).
4566 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4569 3. Fixed a really odd bug that affected only the testing scheme; patching a
4570 certain fixed string in the binary changed the value of another string that
4571 happened to be identical to the end of the original first string.
4573 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4574 name", it returns that address as the IP address. On some operating
4575 systems (e.g. Solaris), it also passes back the IP address string as the
4576 "host name". However, on others (e.g. Linux), it passes back an empty
4577 string. Exim wasn't checking for this, and was changing the host name to an
4578 empty string, assuming it had been canonicized.
4580 5. Although rare, it is permitted to have more than one PTR record for a given
4581 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4582 all the names associated with an address, because they do in Solaris.
4583 However, it seems that they do not in Linux for data that comes from the
4584 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4585 I found this out when I moved to a new Linux workstation and tried to run
4586 the Exim test suite.
4588 To get round this problem I have changed the code so that it now does its
4589 own call to the DNS to look up PTR records when searching for a host name.
4590 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4591 addresses that are only in /etc/hosts are still found.
4593 This behaviour is, however, controlled by an option called host_lookup_
4594 order, which defaults to "bydns:byaddr". If people want to use the other
4595 order, or indeed, just use one or the other means of lookup, they can
4596 specify it in this variable.
4598 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4599 some operating systems, this comes back from gethostbyaddr() as an empty
4600 string, and this is what Exim used to test for. However, it seems that in
4601 other systems, "." is yielded. Exim now tests for this case too.
4603 7. The values of check_spool_space and check_log_space are now held internally
4604 as a number of kilobytes instead of an absolute number of bytes. If a
4605 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4606 kilobyte. This means that much larger values can be stored.
4608 8. Exim monitor: an attempt to get the action menu when not actually pointing
4609 at a message produces an empty menu entitled "No message selected". This
4610 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4611 no entries in it ("Shell widget menu has zero width and/or height"). So I
4612 have added a single, blank menu entry in this case.
4614 9. Added ${quote_local_part.
4616 10. MIME decoding is now applied to the contents of Subject: header lines when
4619 11. Now that a reference to $sender_host_address automatically causes a reverse
4620 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4621 host lookup before query-style lookups in lists that might use this
4622 variable. This has therefore been abolished, and the "net-" prefix is no
4623 longer necessary for query-style lookups.
4625 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4626 have been a typo for LFLAGS, so it has been changed.
4628 13. The install script calls Exim with "-C /dev/null" in order to find the
4629 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4630 to be output. Howeve, since Exim outputs its version number before the
4631 error, it didn't break the script. It just looked ugly. I fixed this by
4632 always allowing "-C /dev/null" if the caller is root.
4634 14. Ignore overlarge ACL variable number when reading spool file - insurance
4635 against a later release with more variables having written the file.
4637 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4638 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4639 this, as well as the form without the "IPv6" on the front.
4641 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4642 OS/Makefile-Darwin file.
4644 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4645 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4647 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4648 variable. However, some OS use ints for inodes. I've added cast to long int
4649 to get rid of the compiler warning.
4651 19. I had forgotten to lock out "/../" in configuration file names when
4652 ALT_CONFIG_PREFIX was set.
4654 20. Routers used for verification do not need to specify transports. However,
4655 if such a router generated a host list, and callout was configured, Exim
4656 crashed, because it could not find a port number from the (non-existent)
4657 transport. It now assumes port 25 in this circumstance.
4659 21. Added the -t option to exigrep.
4661 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4662 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4663 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4664 them is set, LOOKUP_LSEARCH is forced.
4666 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4668 24. Added sender and host information to the "rejected by local_scan()" log
4669 line; previously there was no indication of these.
4671 25. Added .include_if_exists.
4673 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4674 Linux. It turns out that not all file systems support this. Apparently some
4675 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4676 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4677 not supported on the file descriptor, is now ignored when Exim is trying to
4678 sync a directory. This applies only to Linux.
4680 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4682 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4683 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4686 29. Added support for maildirsize files from supplied patch (modified a bit).
4688 30. The use of :fail: followed by an empty string could lead Exim to respond to
4689 sender verification failures with (e.g.):
4691 550 Verification failed for <xxx>
4692 550 Sender verify failed
4694 where the first response line was missing the '-' that indicates it is not
4695 the final line of the response.
4697 31. The loop for finding the name of the user that called Exim had a hardwired
4698 limit of 10; it now uses the value of finduser_retries, which is used for
4699 all other user lookups.
4701 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4704 33. Exim was neglecting to zero errno before one call of strtol() when
4705 expanding a string and expecting an integer value. On some systems this
4706 resulted in spurious "integer overflow" errors. Also, it was casting the
4707 result into an int without checking.
4709 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4710 did not work. The code looks as if it has *never* worked, though it appears
4711 to have been documented since at least releast 1.62. I have made it work.
4713 35. The "timeout_DNS" error in retry rules, also documented since at least
4714 1.62, also never worked. As it isn't clear exactly what this means, and
4715 clearly it isn't a major issue, I have abolished the feature by treating it
4716 as "timeout", and writing a warning to the main and panic logs.
4718 36. The display of retry rules for -brt wasn't always showing the error code
4721 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4722 timeout_connect_A, timeout_connect_MX.
4724 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4725 to the empty sender.
4727 39. The daemon was not analysing the content of -oX till after it had closed
4728 stderr and disconnected from the controlling terminal. This meant that any
4729 syntax errors were only noted on the panic log, and the return code from
4730 the command was 0. By re-arranging the code a little, I've made the
4731 decoding happen first, so such errors now appear on stderr, and the return
4732 code is 1. However, the actual setting up of the sockets still happens in
4733 the disconnected process, so errors there are still only recorded on the
4736 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4737 connections (as happens on some IP stacks) was logged at start up time as
4738 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4739 it from "IPv6 and IPv4", which means that two separate sockets are being
4742 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4743 says whether AF_INET or AF_INET6 was passed as an argument.
4745 42. Exiwhat output was messed up when time zones were included in log
4748 43. Exiwhat now gives more information about the daemon's listening ports,
4749 and whether -tls-on-connect was used.
4751 44. The "port" option of the smtp transport is now expanded.
4753 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4754 silently ignored. Now an error message is written to the main and panic
4757 46. There's a new ACL modifier called "logwrite" which writes to a log file
4758 as soon as it is encountered.
4760 47. Added $local_user_uid and $local_user_gid at routing time.
4762 48. Exim crashed when trying to verify a sender address that was being
4765 49. Exim was recognizing only a space character after ".include". It now also
4766 recognizes a tab character.
4768 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4769 extracting the relevant information from the specification. The man page no
4770 longer contains scrambled data for the -d option, and I've added a section
4771 at the front about calling Exim under different names.
4773 51. Added "extra_headers" argument to the "mail" command in filter files.
4775 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4778 53. Installed eximstats 1.29.
4780 54. Added transport_filter_timeout as a generic transport option.
4782 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4783 Cc: header lines. This was required by RFC 822, but it not required by RFC
4786 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4787 incoming messages that did not have them. Now it does so only if the
4788 message originates locally, that is, if there is no associated remote host
4789 address. When Resent- header lines are present, this applies to the Resent-
4790 lines rather than the non-Resent- lines.
4792 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4793 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4795 58. Messages for configuration errors now include the name of the main
4796 configuration file - useful now that there may be more than one file in a
4797 list (.included file names were always shown).
4799 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4800 for those rare installations that do not start the daemon as root or run it
4801 setuid root. I've cut out the call to initgroups() if the daemon is not
4804 60. The Exim user and group can now be bound into the binary as text strings
4805 that are looked up at the start of Exim's processing.
4807 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4809 62. Added $mailstore_basename variable.
4811 63. Installed patch to sieve.c from Michael Haardt.
4813 64. When Exim failed to open the panic log after failing to open the main log,
4814 the original message it was trying to log was written to stderr and debug
4815 output, but if they were not available (the usual case in production), it
4816 was lost. Now it is written to syslog before the two lines that record the
4817 failures to open the logs.
4819 65. Users' Exim filters run in subprocesses under the user's uid. It is
4820 possible for a "deliver" command or an alias in a "personal" command to
4821 provoke an address rewrite. If logging of address rewriting is configured,
4822 this fails because the process is not running as root or exim. There may be
4823 a better way of dealing with this, but for the moment (because 4.30 needs
4824 to be released), I have disabled address rewrite logging when running a
4825 filter in a non-root, non-exim process.
4831 1. The buildconfig auxiliary program wasn't quoting the value set for
4832 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4833 not defined. This bug was masked in 4.22 by the effect that was fixed in
4836 2. Some messages that were rejected after a message id was allocated were
4837 shown as "incomplete" by exigrep. It no longer does this for messages that
4838 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4840 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4841 have allow_domain_literals set, the ID did not get logged in the <= line.
4842 Domain literals are now always recognized in Message-ID: header lines.
4844 4. The first argument for a ${extract expansion item is the key name or field
4845 number. Leading and trailing spaces in this item were not being ignored,
4846 causing some misleading effects.
4848 5. When deliver_drop_privilege was set, single queue runner processes started
4849 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4850 same command in the process it spins off) were not dropping privilege.
4852 6. When the daemon running as "exim" started a queue runner, it always
4853 re-executed Exim in the spun-off process. This is a waste of effort when
4854 deliver_drop_privilege is set. The new process now just calls the
4855 queue-runner function directly.
4861 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4864 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4865 ignored. Though the use of -oP was forcing the writing of a pid file, it
4866 was always written to the default place.
4868 3. If the message "no IP address found for host xxxx" is generated during
4869 incoming verification, it is now followed by identification of the incoming
4870 connection (so you can more easily find what provoked it).
4872 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4874 5. Added some features to "harden" Exim a bit more against certain attacks:
4876 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4877 be put in Local/Makefile. This is like the never_users runtime option,
4878 but it cannot be overridden. The default setting is "root".
4880 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4881 prefix string with which any file named in a -C command line option
4884 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4885 is retained for -C and -D only if the caller of Exim is root. Without
4886 it, the exim user may also use -C and -D and retain privilege.
4888 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4889 command line option is disabled.
4891 6. Macro names set by the -D option must start with an upper case letter, just
4892 like macro names defined in the configuration file.
4894 7. Added "dereference=" facility to LDAP.
4896 8. Two instances of the typo "uknown" in the source files are fixed.
4898 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4899 the Configure-Makefile script screwed up while processing it.
4901 10. Incorporated PCRE 4.4.
4903 11. The SMTP synchronization check was not operating right at the start of an
4904 SMTP session. For example, it could not catch a HELO sent before the client
4905 waited for the greeting. There is now a check for outstanding input at the
4906 point when the greeting is written. Because of the duplex, asynchronous
4907 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4908 way, but not yet received, when the check is performed.
4910 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4911 on TCP/IP sockets, because this apparently causes some broken clients to
4914 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4915 unchanged) from the Cygwin maintainer.
4917 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4918 was supported instead of testing for mbx. Effectively a typo.
4920 15. The spa authenticator server code was not checking that the input it
4921 received was valid base64.
4923 16. The debug output line for the "set" modifier in ACLs was not showing the
4924 name of the variable that was being set.
4926 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4928 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4929 lookup on its own. Something else was needed to trigger the lookup. For
4930 example, a match in host_lookup or the need for a host name in a host list.
4931 Now, if $sender_host_name is referenced and the host name has not yet been
4932 looked up, a lookup is performed. If the lookup fails, the variable remains
4933 empty, and $host_lookup_failed is set to "1".
4935 19. Added "eqi" as a case-independent comparison operator.
4937 20. The saslauthd authentication condition could segfault if neither service
4938 nor realm was specified.
4940 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4941 error message that was logged was misleading, and incoming SMTP
4942 connections were dropped. The message is now more accurate, and temporary
4943 errors are given to SMTP connections.
4945 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4946 (except RSET) with a 421 error, until QUIT is received. However, it was
4947 failing to send a response to QUIT.
4949 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4950 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4951 ACL is now run after the helo_try_verify_hosts code.
4953 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4954 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4955 case-independent, so other case variants are also recognized). Apparently
4956 some systems use these upper case variants.
4958 25. If more than two messages were waiting for the same host, and a transport
4959 filter was specified for the transport, Exim sent two messages over the
4960 same TCP/IP connection, and then failed with "socket operation on non-
4961 socket" when it tried to send the third.
4963 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4965 27. The extern definition of crypt16() in expand.c was not being excluded when
4966 the OS had its own crypt16() function.
4968 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4969 as a preferred synonym for return_size_limit, both as an option and as an
4972 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4974 30. Changed the default configuration ACL to relax the local part checking rule
4975 for addresses that are not in any local domains. For these addresses,
4976 slashes and pipe symbols are allowed within local parts, but the sequence
4977 /../ is explicitly forbidden.
4979 31. SPA server authentication was not clearing the challenge buffer before
4982 32. log_message in a "warn" ACL statement was writing to the reject log as
4983 well as to the main log, which contradicts the documentation and doesn't
4984 seem right (because no rejection is happening). So I have stopped it.
4986 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4987 However, I am unable to do any testing of this.
4989 34. Fixed an infelicity in the appendfile transport. When checking directories
4990 for a mailbox, to see if any needed to be created, it was accidentally
4991 using path names with one or more superfluous leading slashes; tracing
4992 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4994 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4995 contents are added to the log line that is written for every discarded
4996 recipient. (Previously a log_message setting was ignored.)
4998 36. The ${quote: operator now quotes the string if it is empty.
5000 37. The install script runs exim in order to find its version number. If for
5001 some reason other than non-existence or emptiness, which it checks, it
5002 could not run './exim', it was installing it with an empty version number,
5003 i.e. as "exim-". This error state is now caught, and the installation is
5006 38. An argument was missing from the function that creates an error message
5007 when Exim fails to connect to the socket for saslauthd authentication.
5008 This could cause Exim to crash, or give a corrupted message.
5010 39. Added isip, isip4, and isip6 to ${if conditions.
5012 40. The ACL variables $acl_xx are now saved with the message, and can be
5013 accessed later in routers, transports, and filters.
5015 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5016 strings in the file are not string-expanded.
5018 42. If a MAIL command specified a SIZE value that was too large to fit into an
5019 int variable, the check against message_size_limit failed. Such values are
5020 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5021 day this will have to be increased, but I don't think I want to be around
5022 when emails are that large.
5029 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5030 iconv() is not standard in FreeBSD.
5032 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5033 IPv6 enabled. The observed symptom was a segmentation fault on return from
5034 the function os_common_find_running_interfaces() in src/os.c.
5036 3. In the check_special_case() function in daemon.c I had used "errno" as an
5037 argument name, which causes warnings on some systems. This was basically a
5038 typo, since it was named "eno" in the comments!
5040 4. The code that waits for the clock to tick (at a resolution of some fraction
5041 of a second) so as to ensure message-id uniqueness was always waiting for
5042 at least one whole tick, when it could have waited for less. [This is
5043 almost certainly not relevant at current processor speeds, where it is
5044 unlikely to ever wait at all. But we try to future-proof.]
5046 5. The function that sleeps for a time interval that includes fractions of a
5047 second contained a race. It did not block SIGALRM between setting the
5048 timer, and suspending (a couple of lines later). If the interval was short
5049 and the sigsuspend() was delayed until after it had expired, the suspension
5050 never ended. On busy systems this could lead to processes getting stuck for
5053 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5054 process, before it forks any delivery processes. The open lookup caching
5055 mechanism meant that the open file or database connection was passed into
5056 the delivery process. The problem was that delivery processes always tidy
5057 up cached lookup data. This could cause a problem for the next delivery
5058 process started by the queue runner, because the external queue runner
5059 process does not know about the closure. So the next delivery process
5060 still has data in the lookup cache. In the case of a file lookup, there was
5061 no problem because closing a file descriptor in a subprocess doesn't affect
5062 the parent. However, if the lookup was caching a connection to a database,
5063 the connection was closed, and the second delivery process was likely to
5064 see errors such as "PGSQL: query failed: server closed the connection
5065 unexpectedly". The problem has been fixed by closing all cached lookups
5066 in a queue runner before running a delivery process.
5068 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5069 seem to have the "const" qualifier which it has on other OS. I've
5072 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5073 *of the same type* (client or server) with the same public name that an
5074 error should be diagnosed.
5076 9. When Exim looked up a host name for an IP address, but failed to find the
5077 original IP address when looking up the host name (a safety check), it
5078 output the message "<ip address> does not match any IP for NULL", which was
5079 confusing, to say the least. The bug was that the host name should have
5080 appeared instead of "NULL".
5082 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5083 user that is built into the binary, and the -C or -D options is used, root
5084 privilege is dropped before the configuration file is read. In addition,
5085 logging is switched to stderr instead of the normal log files. If the
5086 configuration then re-defines the Exim user, the unprivileged environment
5087 is probably not what is expected, so Exim logs a panic warning message (but
5090 However, if deliver_drop_privilege is set, the unprivileged state may well
5091 be exactly what is intended, so the warning has been cut out in that case,
5092 and Exim is allowed to try to write to its normal log files.
5098 1. smtp_return_error_details was not giving details for temporary sender
5099 or receiver verification errors.
5101 2. Diagnose a configuration error if two authenticators have the same public
5104 3. Exim used not to create the message log file for a message until the first
5105 delivery attempt. This could be confusing when incoming messages were held
5106 for policy or load reasons. The message log file is now created at the time
5107 the message is received, and an initial "Received" line is written to it.
5109 4. The automatically generated man page for command line options had a minor
5110 bug that caused no ill effects; however, a more serious problem was that
5111 the procedure for building the man page automatically didn't always
5112 operate. Consequently, release 4.20 contains an out-of-date version. This
5113 shouldn't happen again.
5115 5. When building Exim with embedded Perl support, the script that builds the
5116 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5117 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5119 6. The freeze_tell option was not being used for messages that were frozen on
5120 arrival, either by an ACL or by local_scan().
5122 7. Added the smtp_incomplete_transaction log selector.
5124 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5125 was accepting AUTH without a new EHLO.
5127 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5128 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5131 10. Logging of TCP/IP connections (when configured) now happens in the main
5132 daemon process instead of the child process, so that the TCP/IP connection
5133 count is more accurate (but it can never be perfect).
5135 11. The use of "drop" in a nested ACL was not being handled correctly in the
5136 outer ACL. Now, if condition failure induced by the nested "drop" causes
5137 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5138 or "require"), the connection is dropped.
5140 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5141 that yield "discard" can now be used with an "accept" or a "discard" verb,
5142 but an error is generated for any others (because I can't see a useful way
5143 to define what should happen).
5145 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5146 are now processed in the same way as lines in the Exim configuration file.
5147 In particular, continuation lines are supported.
5149 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5151 15. Added -ti meaning -t -i.
5153 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5154 domains, and warn by logging if others are found.
5156 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5157 returned from GIFCONF when Exim is trying to find the list of interfaces on
5158 a host. The code in os.c has been modified to copy each ifreq to an aligned
5159 structure in all cases.
5161 Also, in some cases, the returned ifreq's were being copied to a 'struct
5162 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5163 means the last couple of bytes of an IPv6 address could be chopped if the
5164 ifreq contained only a normal sockaddr (14 bytes storage).
5166 18. Named domain lists were not supported in the hosts_treat_as_local option.
5167 An entry such as +xxxx was not recognized, and was treated as a literal
5170 19. Ensure that header lines added by a DATA ACL are included in the reject log
5171 if the ACL subsequently rejects the message.
5173 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5174 MD5 (which is deprecated).
5176 21. When testing a filter file using -bf, Exim was writing a message when it
5177 took the sender from a "From " line in the message, but it was not doing so
5178 when it took $return_path from a Return-Path: header line. It now does.
5180 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5181 with a valid header line field name (a series of printing characters
5182 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5184 23. Changed "disc" in the source to "disk" to conform to the documentation and
5185 the book and for uniformity.
5187 24. Ignore Sendmail's -Ooption=value command line item.
5189 25. When execve() failed while trying to run a command in a pipe transport,
5190 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5191 could be confused with a return value of 69 from the command itself. This
5192 has been changed to 127, the value the shell returns if it is asked to run
5193 a non-existent command. The wording for the related log line suggests a
5194 non-existent command as the problem.
5196 26. If received_header_text expands to an empty string, do not add a Received:
5197 header line to the message. (Well, it adds a token one on the spool, but
5198 marks it "old" so that it doesn't get used or transmitted.)
5200 27. Installed eximstats 1.28 (addition of -nt option).
5202 28. There was no check for failure on the call to getsockname() in the daemon
5203 code. This can fail if there is a shortage of resources on the system, with
5204 ENOMEM, for example. A temporary error is now given on failure.
5206 29. Contrary to the C standard, it seems that in some environments, the
5207 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5208 program. Exim now does this explicitly; it affects the formatting of
5209 timestamps using strftime().
5211 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5212 complaints. I've now initialized all the variables, to avoid this.
5214 32. Header lines added by a system filter were not being "seen" during
5215 transport-time rewrites.
5217 33. The info_callback() function passed to OpenSSL is set up with type void
5218 (*)(SSL *, int, int), as described somewhere. However, when calling the
5219 function (actually a macro) that sets it up, the type void(*)() is
5220 expected. I've put in a cast to prevent warnings from picky compilers.
5222 34. If a DNS black list lookup found a CNAME record, but there were no A
5223 records associated with the domain it pointed at, Exim crashed.
5225 35. If a DNS black list lookup returned more than one A record, Exim ignored
5226 all but the first. It now scans all returned addresses if a particular IP
5227 value is being sought. In this situation, the contents of the
5228 $dnslist_value variable are a list of all the addresses, separated by a
5231 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5232 to accept a host name and all its aliases if the forward lookup for any of
5233 them yielded the IP address of the incoming connection. Now it accepts only
5234 those names whose forward lookup yields the correct IP address. Any other
5235 names are discarded. This closes a loophole whereby a rogue DNS
5236 administrator could create reverse DNS records to break through a
5237 wildcarded host restriction in an ACL.
5239 37. If a user filter or a system filter that ran in a subprocess used any of
5240 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5241 the wrong values were passed to the pipe command ($thisaddress had the
5242 value of $0, $0 had the value of $1, etc). This bug was introduced by
5243 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5245 38. Improved the line breaking for long SMTP error messages from ACLs.
5246 Previously, if there was no break point between 40 and 75 characters, Exim
5247 left the rest of the message alone. Two changes have been made: (a) I've
5248 reduced the minimum length to 35 characters; (b) if it can't find a break
5249 point between 35 and 75 characters, it looks ahead and uses the first one
5250 that it finds. This may give the occasional overlong line, but at least the
5251 remaining text gets split now.
5253 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5254 file descriptors might be low, and that setting 1000 would always raise it.
5255 It turns out that in some environments, the limit is already over 1000 and
5256 that lowering it causes trouble. So now Exim takes care not to decrease it.
5258 40. When delivering a message, the value of $return_path is set to $sender_
5259 address at the start of routing (routers may change the value). By an
5260 oversight, this default was not being set up when an address was tested by
5261 -bt or -bv, which affected the outcome if any router or filter referred to
5264 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5265 log only when "message" or "log_message" are set. However, if one of the
5266 conditions was an address verification, or a call to a nested ACL, the
5267 messages generated by the underlying test were being passed through. This
5268 no longer happens. The underlying message is available in $acl_verify_
5269 message for both "message" and "log_message" expansions, so it can be
5270 passed through if needed.
5272 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5273 new expansion $bh_ to give the encoded byte string without charset
5274 translation. Translation happens only if iconv() is available; HAVE_ICONV
5275 indicates this at build time. HEADERS_CHARSET gives the charset to
5276 translate to; headers_charset can change it in the configuration, and
5277 "headers charset" can change it in an individual filter file.
5279 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5280 that creates RFC 2047 encoded "words" labels them as that charset instead
5281 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5282 expansion operator; (ii) when Exim creates a From: line for a local
5283 message; (iii) when a header line is rewritten to include a "phrase" part.
5285 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5286 buggy, causing it to skip the first lines of messages whose message ID
5287 ended in 'D'. This would not have bitten before Exim release 4.14, because
5288 message IDs were unlikely to end in 'D' before then. The effect was to have
5289 incorrect size information for certain domains.
5291 45. #include "config.h" was missing at the start of the crypt16.c module. This
5292 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5295 46. If there was a timeout during a "random" callout check, Exim treated it as
5296 a failure of the random address, and carried on sending RSET and the real
5297 address. If the delay was just some slowness somewhere, the response to the
5298 original RCPT would be taken as a response to RSET and so on, causing
5299 mayhem of various kinds.
5301 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5302 when I implemented it. It didn't allow for the fact that some option values
5303 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5304 the right test for positive values.
5306 48. Domain names in DNS records are case-independent. Exim always looks them up
5307 in lower case. Some resolvers return domain names in exactly the case they
5308 appear in the zone file, that is, they may contain uppercase letters. Not
5309 all resolvers do this - some return always lower case. Exim was treating a
5310 change of case by a resolver as a change of domain, similar to a widening
5311 of a domain abbreviation. This triggered its re-routing code and so it was
5312 trying to route what was effectively the same domain again. This normally
5313 caused routing to fail (because the router wouldn't handle the domain
5314 twice). Now Exim checks for this case specially, and just changes the
5315 casing of the domain that it ultimately uses when it transmits the message
5318 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5321 50. If a filter generated a file delivery with a non-absolute name (possible if
5322 no home directory exists for the router), the forbid_file option was not
5325 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5326 the existing equality matching.
5328 52. Exim was using ints instead of ino_t variables in some places where it was
5329 dealing with inode numbers.
5331 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5332 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5333 called TMPDIR, and if it finds it is different, it changes its value.
5335 54. The smtp_printf() function is now made available to local_scan() so
5336 additional output lines can be written before returning. There is also an
5337 smtp_fflush() function to enable the detection of a dropped connection.
5338 The variables smtp_input and smtp_batched_input are exported to
5341 55. Changed the default runtime configuration: the message "Unknown user"
5342 has been removed from the ACL, and instead placed on the localuser router,
5343 using the cannot_route_message feature. This means that any verification
5344 failures that generate their own messages won't get overridden. Similarly,
5345 the "Unrouteable address" message that was in the ACL for unverifiable
5346 relay addresses has also been removed.
5348 56. Added hosts_avoid_esmtp to the smtp transport.
5350 57. The exicyclog script was not checking for the esoteric option
5351 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5352 will work only if exicyclog is run under the appropriate euid.
5354 58. Following a discussion on the list, the rules by which Exim recognises line
5355 endings on incoming messages have been changed. The -dropcr and drop_cr
5356 options are now no-ops, retained only for backwards compatibility. The
5357 following line terminators are recognized: LF CRLF CR. However, special
5358 processing applies to CR:
5360 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5361 nor a local message in the state where . is a terminator.
5363 (ii) If a bare CR is encountered in a header line, an extra space is added
5364 after the line terminator so as not to end the header. The reasoning
5365 behind this is that bare CRs in header lines are most likely either
5366 to be mistakes, or people trying to play silly games.
5368 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5369 was being incorrectly given as 18 bytes larger than it should have been.
5370 This is a VOB (very old bug).
5372 60. This may never have affected anything current, but just in case it has:
5373 When the local host is found other than at the start of a list of hosts,
5374 the local host, those with the same MX, and any that follow, are discarded.
5375 When the list in question was part of a longer list of hosts, the following
5376 hosts (not currently being processed) were also being discarded. This no
5377 longer happens. I'm not sure if this situation could ever has previously
5380 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5383 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5384 header. This is something that is recommended in a new Internet Draft, and
5385 is something that is documented as being done by Sendmail. There are two
5386 possible values. For messages generated by the autoreply transport, Exim
5389 Auto-Submitted: auto-replied
5391 whereas for all other generated messages (e.g. bounces) it adds
5393 Auto-Submitted: auto-generated
5395 63. The "personal" condition in filters now includes a test for the
5396 Auto-Submitted: header. If it contains the string "auto-" the message it
5397 not considered personal.
5399 64. Added rcpt_include_affixes as a generic transport option.
5401 65. Added queue_only_override (default true).
5403 66. Added the syslog_duplication option.
5405 67. If what should have been the first header line of a message consisted of
5406 a space followed by a colon, Exim was mis-interpreting it as a header line.
5407 It isn't of course - it is syntactically invalid and should therefore be
5408 treated as the start of the message body. The misbehaviour could have
5409 caused a number of strange effects, including loss of data in subsequent
5410 header lines, and spool format errors.
5412 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5413 client host had authenticated. This control can now be exercised by an ACL
5414 for more flexibility.
5416 69. By default, callouts do not happen when testing with -bh. There is now a
5417 variant, -bhc, which does actually run the callout code, including
5418 consulting and updating the callout cache.
5420 70. Added support for saslauthd authentication, courtesy of Alexander
5423 71. If statvfs() failed on the spool or log directories while checking their
5424 size for availability, Exim confusingly gave the error "space shortage".
5425 Furthermore, in debugging mode it crashed with a floating point exception.
5426 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5427 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5428 serious problem, Exim now writes to the main and panic logs when this
5429 happens, with details of the failure. It then refuses to accept the
5430 incoming message, giving the message "spool directory problem" or "log
5431 directory problem" with a 421 code for SMTP messages.
5433 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5434 0, 1, and 2 exist, because some OS complain for execs without them (see
5435 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5436 descriptors. However, the code omitted to check that the open succeeded,
5437 causing mysterious errors if for some reason the permissions on /dev/null
5438 got screwed. Now Exim writes a message to the main and panic logs, and
5439 bombs out if it can't open /dev/null.
5441 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5442 interact so that it is all more flexible. It is supposed to remain
5443 backwards compatible. Also added extra_local_interfaces.
5445 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5446 to bomb out with an assertion failure - to the client this appears as a
5447 connection drop. This problem occurs in the part of the code that was taken
5448 from the Samba project. Fortunately, the assertion is in a very simple
5449 function, so I have fixed this by reproducing the function inline in the
5450 one place where it is called, and arranging for authentication to fail
5451 instead of killing the process with assert().
5453 75. The SPA client code was not working when the server requested OEM rather
5454 than Unicode encoding.
5456 76. Added code to make require_files with a specific uid setting more usable in
5457 the case where statting the file as root fails - usually a non-root-mounted
5458 NFS file system. When this happens and the failure is EACCES, Exim now
5459 forks a subprocess and does the per-uid checking as the relevant uid.
5461 77. Added process_log_path.
5463 78. If log_file_path was not explicitly set, a setting of check_log_space or
5464 check_log_inodes was ignored.
5466 79. If a space check for the spool or log partitions fails, the incident is now
5467 logged. Of course, in the latter case the data may get lost...
5469 80. Added the %p formatting code to string_format() so that it can be used to
5470 print addresses in debug_print(). Adjusted all the address printing in the
5471 debugging in store.c to use %p rather than %d.
5473 81. There was a concern that a line of code in smtp_in.c could overflow a
5474 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5475 initially expressed, the concern was not well-founded, because trailing
5476 spaces are removed early. However, if the trailing spaces were followed by
5477 a NULL, they did not get removed, so the overflow was possible. Two fixes
5480 (a) I re-wrote the offending code in a cleaner fashion.
5481 (b) If an incoming SMTP command contains a NULL character, it is rejected
5484 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5485 runs initgroups(), so that if the Exim user is in any additional groups,
5486 they will be used during message reception.
5492 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob