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.
11 NM/01 Bugzilla 949 - Documentation tweak
13 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
16 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
18 PP/02 Implemented gsasl authenticator.
20 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
22 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
23 `pkg-config foo` for cflags/libs.
25 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
26 with rest of GSASL and with heimdal_gssapi.
28 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
29 `pkg-config foo` for cflags/libs for the TLS implementation.
31 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
32 properties get this fed in as external SSF. A number of robustness
33 and debugging improvements to the cyrus_sasl authenticator.
39 PP/01 Solaris build fix for Oracle's LDAP libraries.
40 Bugzilla 1109, patch from Stephen Usher.
42 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
44 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
47 TF/02 Fix a couple more cases where we did not log the error message
48 when unlink() failed. See also change 4.74-TF/03.
50 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
51 lock up or crash if it happened to be inside a call to libc when it
52 got a SIGUSR1 from exiwhat.
54 The SIGUSR1 handler appends the current process status to the process
55 log which is later printed by exiwhat. It used to use the general
56 purpose logging code to do this, but several functions it calls are
59 The new output code in the SIGUSR1 handler is specific to the process
60 log, and simple enough that it's easy to inspect for signal safety.
61 Removing some special cases also simplifies the general logging code.
62 Removing the spurious timestamps from the process log simplifies
65 TF/04 Improved ratelimit ACL condition.
67 The /noupdate option has been deprecated in favour of /readonly which
68 has clearer semantics. The /leaky, /strict, and /readonly update modes
69 are mutually exclusive. The update mode is no longer included in the
70 database key; it just determines when the database is updated. (This
71 means that when you upgrde Exim will forget old rate measurements.)
73 Exim now checks that the per_* options are used with an update mode that
74 makes sense for the current ACL. For example, when Exim is processing a
75 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
76 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
77 must specify per_mail/readonly. If you omit the update mode it defaults to
78 /leaky where that makes sense (as before) or /readonly where required.
80 The /noupdate option is now undocumented but still supported for
81 backwards compatibility. It is equivalent to /readonly except that in
82 ACLs where /readonly is required you may specify /leaky/noupdate or
83 /strict/noupdate which are treated the same as /readonly.
85 A useful new feature is the /count= option. This is a generalization
86 of the per_byte option, so that you can measure the throughput of other
87 aggregate values. For example, the per_byte option is now equivalent
88 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
90 The per_rcpt option has been generalized using the /count= mechanism
91 (though it's more complicated than the per_byte equivalence). When it is
92 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
93 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
94 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
95 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
96 Note that using per_rcpt with a non-readonly update mode in more than
97 one ACL will cause the recipients to be double-counted. (The per_mail
98 and per_byte options don't have this problem.)
100 The handling of very low rates has changed slightly. If the computed rate
101 is less than the event's count (usually one) then this event is the first
102 after a long gap. In this case the rate is set to the same as this event's
103 count, so that the first message of a spam run is counted properly.
105 The major new feature is a mechanism for counting the rate of unique
106 events. The new per_addr option counts the number of different
107 recipients that someone has sent messages to in the last time period. It
108 behaves like per_rcpt if all the recipient addresses are different, but
109 duplicate recipient addresses do not increase the measured rate. Like
110 the /count= option this is a general mechanism, so the per_addr option
111 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
112 example, measure the rate that a client uses different sender addresses
113 with the options per_mail/unique=$sender_address. There are further
114 details in the main documentation.
116 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
118 TF/06 Removed a few PCRE remnants.
120 TF/07 Automatically extract Exim's version number from tags in the git
121 repository when doing development or release builds.
123 PP/02 Raise smtp_cmd_buffer_size to 16kB.
124 Bugzilla 879. Patch from Paul Fisher.
126 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
127 Heavily based on revision 40f9a89a from Simon Arlott's tree.
130 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
132 PP/05 Variable $av_failed, true if the AV scanner deferred.
133 Bugzilla 1078. Patch from John Horne.
135 PP/06 Stop make process more reliably on build failure.
136 Bugzilla 1087. Patch from Heiko Schlittermann.
138 PP/07 Make maildir_use_size_file an _expandable_ boolean.
139 Bugzilla 1089. Patch from Heiko Schlittermann.
141 PP/08 Handle ${run} returning more data than OS pipe buffer size.
142 Bugzilla 1131. Patch from Holger Weiß.
144 PP/09 Handle IPv6 addresses with SPF.
145 Bugzilla 860. Patch from Wolfgang Breyha.
147 PP/10 GnuTLS: support TLS 1.2 & 1.1.
149 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
152 PP/11 match_* no longer expand right-hand-side by default.
153 New compile-time build option, EXPAND_LISTMATCH_RHS.
154 New expansion conditions, "inlist", "inlisti".
156 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
158 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
160 PP/14 fix log_write() format string regression from TF/03.
161 Bugzilla 1152. Patch from Dmitry Isaikin.
167 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
169 PP/02 Harmonised TLS library version reporting; only show if debugging.
170 Layout now matches that introduced for other libraries in 4.74 PP/03.
172 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
174 PP/04 New "dns_use_edns0" global option.
176 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
179 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
180 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
182 TK/01 Updated PolarSSL code to 0.14.2.
183 Bugzilla 1097. Patch from Andreas Metzler.
185 PP/07 Catch divide-by-zero in ${eval:...}.
188 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
191 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
192 format-string attack -- SECURITY: remote arbitrary code execution.
194 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
195 time unintentionally subject to list matching rules, letting the header
196 cause arbitrary Exim lookups (of items which can occur in lists, *not*
197 arbitrary string expansion). This allowed for information disclosure.
199 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
200 INT_MIN/-1 -- value coerced to INT_MAX.
206 NM/01 Workround for PCRE version dependency in version reporting
209 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
210 This fixes portability to compilers other than gcc, notably
211 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
213 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
214 makefiles for portability to HP-UX and POSIX correctness.
216 PP/01 Permit LOOKUP_foo enabling on the make command-line.
217 Also via indented variable definition in the Makefile.
218 (Debugging by Oliver Heesakkers).
220 PP/02 Restore caching of spamd results with expanded spamd_address.
221 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
223 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
224 Improves build reliability. Fix from: Frank Elsner
226 NM/02 Fix wide character breakage in the rfc2047 coding
227 Fixes bug 1064. Patch from Andrey N. Oktyabrski
229 NM/03 Allow underscore in dnslist lookups
230 Fixes bug 1026. Patch from Graeme Fowler
232 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
233 Code patches from Adam Ciarcinski of NetBSD.
235 NM/04 Fixed exiqgrep to cope with mailq missing size issue
238 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
239 is logged, to avoid truncation. Patch from John Horne.
241 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
242 Patch from Jakob Hirsch.
244 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
245 SQL string expansion failure details.
246 Patch from Andrey Oktyabrski.
248 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
249 Patch from Simon Arlott.
251 PP/09 New lookups functionality failed to compile on old gcc which rejects
252 extern declarations in function scope.
253 Patch from Oliver Fleischmann
255 PP/10 Use sig_atomic_t for flags set from signal handlers.
256 Check getgroups() return and improve debugging.
257 Fixed developed for diagnosis in bug 927 (which turned out to be
260 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
261 Patch from Mark Zealey.
263 PP/12 Bugzilla 1056: Improved spamd server selection.
264 Patch from Mark Zealey.
266 PP/13 Bugzilla 1086: Deal with maildir quota file races.
267 Based on patch from Heiko Schlittermann.
269 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
270 Patch from Uwe Doering, sign-off by Michael Haardt.
272 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
273 variable declaration deep within a block. Bug and patch from
276 PP/15 lookups-Makefile IRIX compatibilty coercion.
278 PP/16 Make DISABLE_DKIM build knob functional.
280 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
281 Patch by Simon Arlott
283 TF/03 Fix valgrind.h portability to C89 compilers that do not support
284 variable argument macros. Our copy now differs from upstream.
290 TF/01 Failure to get a lock on a hints database can have serious
291 consequences so log it to the panic log.
293 TF/02 Log LMTP confirmation messages in the same way as SMTP,
294 controlled using the smtp_confirmation log selector.
296 TF/03 Include the error message when we fail to unlink a spool file.
298 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
299 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
300 for maintaining out-of-tree patches for some time.
302 PP/01 Bugzilla 139: Documentation and portability issues.
303 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
304 Handle per-OS dynamic-module compilation flags.
306 PP/02 Let /dev/null have normal permissions.
307 The 4.73 fixes were a little too stringent and complained about the
308 permissions on /dev/null. Exempt it from some checks.
309 Reported by Andreas M. Kirchwitz.
311 PP/03 Report version information for many libraries, including
312 Exim version information for dynamically loaded libraries. Created
313 version.h, now support a version extension string for distributors
314 who patch heavily. Dynamic module ABI change.
316 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
317 privilege escalation vulnerability whereby the Exim run-time user
318 can cause root to append content of the attacker's choosing to
321 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
324 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
325 If dropping privileges for untrusted macros, we disabled normal logging
326 on the basis that it would fail; for the Exim run-time user, this is not
327 the case, and it resulted in successful deliveries going unlogged.
328 Fixed. Reported by Andreas Metzler.
334 PP/01 Date: & Message-Id: revert to normally being appended to a message,
335 only prepend for the Resent-* case. Fixes regression introduced in
336 Exim 4.70 by NM/22 for Bugzilla 607.
338 PP/02 Include check_rfc2047_length in configure.default because we're seeing
339 increasing numbers of administrators be bitten by this.
341 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
343 PP/03 Bugzilla 994: added openssl_options main configuration option.
345 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
347 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
349 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
351 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
352 without a peer certificate, leading to a segfault because of an
353 assumption that peers always have certificates. Be a little more
354 paranoid. Problem reported by Martin Tscholak.
356 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
357 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
358 NB: ClamAV planning to remove STREAM in "middle of 2010".
359 CL also introduces -bmalware, various -d+acl logging additions and
360 more caution in buffer sizes.
362 PP/09 Implemented reverse_ip expansion operator.
364 PP/10 Bugzilla 937: provide a "debug" ACL control.
366 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
368 PP/12 Bugzilla 973: Implement --version.
370 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
372 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
374 PP/15 Bugzilla 816: support multiple condition rules on Routers.
376 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
377 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
378 ignore trailing whitespace.
380 JJ/02 prevent non-panic DKIM error from being sent to paniclog
382 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
385 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
386 Notification from Dr Andrew Aitchison.
388 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
389 ExtendedDetectionInfo response format.
390 Notification from John Horne.
392 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
395 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
396 XSL and documented dependency on system catalogs, with examples of how
399 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
402 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
403 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
404 configuration file which is writeable by the Exim user or group.
406 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
407 of configuration files to cover files specified with the -C option if
408 they are going to be used with root privileges, not just the default
411 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
412 option (effectively making it always true).
414 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
415 files to be used while preserving root privileges.
417 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
418 that rogue child processes cannot use them.
420 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
421 run-time user, instead of root.
423 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
424 Exim run-time user without dropping privileges.
426 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
427 result string, instead of calling string_vformat() twice with the same
430 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
431 for other users. Others should always drop root privileges if they use
432 -C on the command line, even for a whitelisted configure file.
434 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
436 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
442 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
443 $data_path, and $header_path variables; fixed documentation bugs and
446 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
447 exipick to access non-standard spools, including the "frozen" queue
450 NM/01 Bugzilla 965: Support mysql stored procedures.
451 Patch from Alain Williams
453 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
455 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
456 Patch from Andreas Metzler
458 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
459 Patch from Kirill Miazine
461 NM/05 Bugzilla 671: Added umask to procmail example.
463 JJ/03 installed exipick 20100323.0, fixing doc bug
465 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
466 directory. Notification and patch from Dan Rosenberg.
468 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
470 TK/02 Improve log output when DKIM signing operation fails.
472 MH/01 Treat the transport option dkim_domain as a colon separated
473 list, not as a single string, and sign the message with each element,
474 omitting multiple occurences of the same signer.
476 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
477 Bugzilla 985, 986. Patch by Simon Arlott
479 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
480 Patch by Simon Arlott
482 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
483 MBX locking. Notification from Dan Rosenberg.
489 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
491 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
493 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
495 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
497 NM/04 Bugzilla 915: Flag broken perl installation during build.
503 TK/01 Added patch by Johannes Berg that expands the main option
504 "spamd_address" if it starts with a dollar sign.
506 TK/02 Write list of recipients to X-Envelope-Sender header when building
507 the mbox-format spool file for content scanning (suggested by Jakob
510 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
511 (http://www.dcc-servers.net/) support via dccifd. Activated by
512 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
514 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
515 by Mark Daniel Reidel <mr@df.eu>.
517 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
518 When building exim an external PCRE library is now needed -
519 PCRE is a system library on the majority of modern systems.
520 See entry on PCRE_LIBS in EDITME file.
522 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
523 conversation. Added nologin parameter to request.
524 Patch contributed by Kirill Miazine.
526 TF/01 Do not log submission mode rewrites if they do not change the address.
528 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
530 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
531 log files in place. Contributed by Roberto Lima.
533 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
535 TF/03 Bugzilla 615: When checking the local_parts router precondition
536 after a local_part_suffix or local_part_prefix option, Exim now
537 does not use the address's named list lookup cache, since this
538 contains cached lookups for the whole local part.
540 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
541 Robert Millan. Documentation is in experimental-spec.txt.
543 TF/04 Bugzilla 668: Fix parallel build (make -j).
545 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
547 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
548 Patch provided by Jan Srzednicki.
550 TF/05 Leading white space used to be stripped from $spam_report which
551 wrecked the formatting. Now it is preserved.
553 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
554 that they are available at delivery time.
556 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
558 TF/08 TLS error reporting now respects the incoming_interface and
559 incoming_port log selectors.
561 TF/09 Produce a more useful error message if an SMTP transport's hosts
562 setting expands to an empty string.
564 NM/06 Bugzilla 744: EXPN did not work under TLS.
565 Patch provided by Phil Pennock.
567 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
568 Patch provided by Richard Godbee.
570 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
571 acl_smtp_notquit, added index entry.
573 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
574 Patch provided by Eugene Bujak.
576 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
577 accept(). Patch provided by Maxim Dounin.
579 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
580 Patch provided by Phil Pennock.
582 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
584 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
585 Patch provided by Brad "anomie" Jorsch.
587 NM/14 Bugzilla 622: Added timeout setting to transport filter.
588 Patch provided by Dean Brooks.
590 TK/05 Add native DKIM support (does not depend on external libraries).
592 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
593 Patch provided by Graeme Fowler.
595 NM/16 Bugzilla 851: Documentation example syntax fix.
597 NM/17 Changed NOTICE file to remove references to embedded PCRE.
599 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
602 NM/19 Bugzilla 745: TLS version reporting.
603 Patch provided by Phil Pennock.
605 NM/20 Bugzilla 167: bool: condition support.
606 Patch provided by Phil Pennock.
608 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
609 clients. Patch provided by Phil Pennock.
611 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
612 Patch provided by Brad "anomie" Jorsch.
614 NM/23 Bugzilla 687: Fix misparses in eximstats.
615 Patch provided by Heiko Schlittermann.
617 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
618 Patch provided by Heiko Schlittermann.
620 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
621 plus update to original patch.
623 NM/26 Bugzilla 799: Documentation correction for ratelimit.
625 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
626 Patch provided by David Brownlee.
628 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
630 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
632 NM/30 Bugzilla 888: TLS documentation bugfixes.
634 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
636 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
637 Unlike the original bugzilla I have changed all shell scripts in src tree.
639 NM/33 Bugzilla 898: Transport filter timeout fix.
640 Patch by Todd Rinaldo.
642 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
643 Patch by Serge Demonchaux.
645 NM/35 Bugzilla 39: Base64 decode bug fixes.
646 Patch by Jakob Hirsch.
648 NM/36 Bugzilla 909: Correct connect() call in dcc code.
650 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
652 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
654 NM/39 Bugzilla 911: Fixed MakeLinks build script.
660 TK/01 Add preliminary DKIM support. Currently requires a forked version of
661 ALT-N's libdkim that I have put here:
662 http://duncanthrax.net/exim-experimental/
664 Note to Michael Haardt: I had to rename some vars in sieve.c. They
665 were called 'true' and it seems that C99 defines that as a reserved
666 keyword to be used with 'bool' variable types. That means you could
667 not include C99-style headers which use bools without triggering
668 build errors in sieve.c.
670 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
671 as mailq or other aliases. Changed the --help handling significantly
672 to do whats expected. exim_usage() emits usage/help information.
674 SC/01 Added the -bylocaldomain option to eximstats.
676 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
678 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
680 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
686 PH/01 Another patch from the Sieve maintainer.
688 PH/02 When an IPv6 address is converted to a string for single-key lookup
689 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
690 dots are used instead of colons so that keys in lsearch files need not
691 contain colons. This was done some time before quoting was made available
692 in lsearch files. However, iplsearch files do require colons in IPv6 keys
693 (notated using the quote facility) so as to distinguish them from IPv4
694 keys. This meant that lookups for IP addresses in host lists did not work
695 for iplsearch lookups.
697 This has been fixed by arranging for IPv6 addresses to be expressed with
698 colons if the lookup type is iplsearch. This is not incompatible, because
699 previously such lookups could never work.
701 The situation is now rather anomolous, since one *can* have colons in
702 ordinary lsearch keys. However, making the change in all cases is
703 incompatible and would probably break a number of configurations.
705 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
708 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
709 conversion specification without a maximum field width, thereby enabling
710 a rogue spamd server to cause a buffer overflow. While nobody in their
711 right mind would setup Exim to query an untrusted spamd server, an
712 attacker that gains access to a server running spamd could potentially
713 exploit this vulnerability to run arbitrary code as the Exim user.
715 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
716 $primary_hostname instead of what libspf2 thinks the hosts name is.
718 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
719 a directory entry by the name of the lookup key. Previously, if a
720 symlink pointed to a non-existing file or a file in a directory that
721 Exim lacked permissions to read, a lookup for a key matching that
722 symlink would fail. Now it is enough that a matching directory entry
723 exists, symlink or not. (Bugzilla 503.)
725 PH/03 The body_linecount and body_zerocount variables are now exported in the
728 PH/04 Added the $dnslist_matched variable.
730 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
731 This means they are set thereafter only if the connection becomes
734 PH/06 Added the client_condition to authenticators so that some can be skipped
735 by clients under certain conditions.
737 PH/07 The error message for a badly-placed control=no_multiline_responses left
738 "_responses" off the end of the name.
740 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
742 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
743 (without spaces) instead of just copying the configuration text.
745 PH/10 Added the /noupdate option to the ratelimit ACL condition.
747 PH/11 Added $max_received_linelength.
749 PH/12 Added +ignore_defer and +include_defer to host lists.
751 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
752 way in which PCRE > 7.0 is built.
754 PH/14 Implemented queue_only_load_latch.
756 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
757 MAIL command. The effect was to mangle the value on 64-bit systems.
759 PH/16 Another patch from the Sieve maintainer.
761 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
763 PH/18 If a system quota error occurred while trying to create the file for
764 a maildir delivery, the message "Mailbox is full" was not appended to the
765 bounce if the delivery eventually timed out. Change 4.67/27 below applied
766 only to a quota excession during the actual writing of the file.
768 PH/19 It seems that peer DN values may contain newlines (and other non-printing
769 characters?) which causes problems in log lines. The DN values are now
770 passed through string_printing() before being added to log lines.
772 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
773 and InterBase are left for another time.)
775 PH/21 Added message_body_newlines option.
777 PH/22 Guard against possible overflow in moan_check_errorcopy().
779 PH/23 POSIX allows open() to be a macro; guard against that.
781 PH/24 If the recipient of an error message contained an @ in the local part
782 (suitably quoted, of course), incorrect values were put in $domain and
783 $local_part during the evaluation of errors_copy.
789 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
790 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
793 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
794 issue a MAIL command.
796 PH/02 In an ACL statement such as
798 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
800 if a client was not listed at all, or was listed with a value other than
801 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
802 the condition was not true (as it should be), so access was not denied.
803 The bug was that the ! inversion was incorrectly passed on to the second
804 item. This has been fixed.
806 PH/03 Added additional dnslists conditions == and =& which are different from
807 = and & when the dns lookup returns more than one IP address.
809 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
810 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
812 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
813 FSYNC, which compiles an option called disable_fsync that allows for
814 bypassing fsync(). The documentation is heavily laced with warnings.
816 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
818 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
819 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
820 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
821 including adding "make clean"; (3) Added -fPIC when compiling the test
822 dynamically loaded module, to get rid of a warning.
824 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
825 message fails, move_frozen_messages = true and ignore_bounce_errors_after
826 = 0s. The bug is otherwise harmless.
828 PH/07 There was a bug in the dovecot authenticator such that the value of
829 $auth1 could be overwritten, and so not correctly preserved, after a
830 successful authentication. This usually meant that the value preserved by
831 the server_setid option was incorrect.
833 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
835 PH/09 Installed PCRE release 7.0.
837 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
838 run for batched SMTP input. It is now run at the start of every message
839 in the batch. While fixing this I discovered that the process information
840 (output by running exiwhat) was not always getting set for -bs and -bS
841 input. This is fixed, and it now also says "batched" for BSMTP.
843 PH/11 Added control=no_pipelining.
845 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
846 patch, slightly modified), and move the expansion of helo_data till after
847 the connection is made in the smtp transport (so it can use these
850 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
852 PH/14 Added log_selector = +pid.
854 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
856 PH/16 Add ${if forany and ${if forall.
858 PH/17 Added dsn_from option to vary the From: line in DSNs.
860 PH/18 Flush SMTP output before performing a callout, unless control =
861 no_callout_flush is set.
863 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
864 was true (the default) a successful delivery failed to delete the retry
865 item, thus causing premature timeout of the address. The bug is now
868 PH/20 Added hosts_avoid_pipelining to the smtp transport.
870 PH/21 Long custom messages for fakedefer and fakereject are now split up
871 into multiline reponses in the same way that messages for "deny" and
872 other ACL rejections are.
874 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
875 with slight modification.
877 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
878 draft, changing the syntax and factoring some duplicate code".
880 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
881 for deliveries of the second and subsequent messages over the same SMTP
884 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
885 ${reduce, with only minor "tidies".
887 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
889 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
890 expansion side effects.
892 PH/27 When a message times out after an over-quota error from an Exim-imposed
893 quota, the bounce message says "mailbox is full". This message was not
894 being given when it was a system quota that was exceeded. It now should
897 MH/03 Made $recipients available in local_scan(). local_scan() already has
898 better access to the recipient list through recipients_list[], but
899 $recipients can be useful in postmaster-provided expansion strings.
901 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
902 in the case of a MAIL command with additional options following the
903 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
904 were accidentally chopped off.
906 PH/29 SMTP synchronization checks are implemented when a command is read -
907 there is a check that no more input is waiting when there shouldn't be
908 any. However, for some commands, a delay in an ACL can mean that it is
909 some time before the response is written. In this time, more input might
910 arrive, invalidly. So now there are extra checks after an ACL has run for
911 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
912 pipelining has not been advertised.
914 PH/30 MH's patch to allow iscntrl() characters to be list separators.
916 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
917 returned in the SMTP response when smtp_return_error_details was false.
920 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
921 instead of the C I/O that was originally supplied, because problems were
924 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
925 Exim which did not show up earlier: it was assuming that a call to
926 SSL_CTX_set_info_callback() might give an error value. In fact, there is
927 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
928 was a macro that became an assignment, so it seemed to work. This has
929 changed to a proper function call with a void return, hence the compile
930 error. Exim's code has been fixed.
932 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
935 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
937 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
939 PH/37 If a message is not accepted after it has had an id assigned (e.g.
940 because it turns out to be too big or there is a timeout) there is no
941 "Completed" line in the log. When some messages of this type were
942 selected by exigrep, they were listed as "not completed". Others were
943 picked up by some special patterns. I have improved the selection
944 criteria to be more general.
946 PH/38 The host_find_failed option in the manualroute router can now be set
947 to "ignore", to completely ignore a host whose IP address cannot be
948 found. If all hosts are ignored, the behaviour is controlled by the new
949 host_all_ignored option.
951 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
952 homing or because of multiple MX records with /mx) generated more than
953 one IP address, and the following item turned out to be the local host,
954 all the secondary addresses of the first item were incorrectly removed
955 from the list, along with the local host and any following hosts (which
956 is what is supposed to happen).
958 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
959 whoever called Exim into the -H file. In the case of the daemon it was
960 behaving confusingly. When first started, it used values for whoever
961 started the daemon, but after a SIGHUP it used the Exim user (because it
962 calls itself on a restart). I have changed the code so that it now always
965 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
966 message are rejected with the same error (e.g. no authentication or bad
967 sender address), and a DATA command is nevertheless sent (as can happen
968 with PIPELINING or a stupid MUA), the error message that was given to the
969 RCPT commands is included in the rejection of the DATA command. This is
970 intended to be helpful for MUAs that show only the final error to their
973 PH/42 Another patch from the Sieve maintainer.
975 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
976 Eximstats - Fixed some broken HTML links and added missing column headers
978 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
979 columns for Rejects, Temp Rejects, Ham, and Spam rows.
981 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
983 PH/43 Yet another patch from the Sieve maintainer.
985 PH/44 I found a way to check for a TCP/IP connection going away before sending
986 the response to the final '.' that terminates a message, but only in the
987 case where the client has not sent further data following the '.'
988 (unfortunately, this is allowed). However, in many cases there won't be
989 any further data because there won't be any more messages to send. A call
990 to select() can be used: if it shows that the input is "ready", there is
991 either input waiting, or the socket has been closed. An attempt to read
992 the next input character can distinguish the two cases. Previously, Exim
993 would have sent an OK response which the client would never have see.
994 This could lead to message repetition. This fix should cure that, at
995 least in a lot of common cases.
997 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
998 advertised in response to EHLO.
1004 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1005 fixed by 4.65/MH/01 (is this a record?) are fixed:
1007 (i) An empty string was always treated as zero by the numeric comparison
1008 operators. This behaviour has been restored.
1010 (ii) It is documented that the numeric comparison operators always treat
1011 their arguments as decimal numbers. This was broken in that numbers
1012 starting with 0 were being interpreted as octal.
1014 While fixing these problems I realized that there was another issue that
1015 hadn't been noticed. Values of message_size_limit (both the global option
1016 and the transport option) were treated as octal if they started with 0.
1017 The documentation was vague. These values are now always treated as
1018 decimal, and I will make that clear in the documentation.
1024 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1025 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1028 MH/01 Don't check that the operands of numeric comparison operators are
1029 integers when their expansion is in "skipping" mode (fixes bug
1030 introduced by 4.64-PH/07).
1032 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1033 child addresses, Exim now panics and dies. Previously, because the count
1034 is held in a short int, deliveries were likely to be lost. As such a
1035 large number of recipients for a single message is ridiculous
1036 (performance will be very, very poor), I have chosen to impose a limit
1037 rather than extend the field.
1043 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1044 leftover -K file (the existence of which was triggered by #402).
1045 While we were at it, introduced process PID as part of the -K
1046 filename. This should rule out race conditions when creating
1049 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1050 processing considerably. Previous code took too long for large mails,
1051 triggering a timeout which in turn triggers #401.
1053 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1054 in the DK code in transports.c. sendfile() is not really portable,
1055 hence the _LINUX specificness.
1057 TF/01 In the add_headers option to the mail command in an Exim filter,
1058 there was a bug that Exim would claim a syntax error in any
1059 header after the first one which had an odd number of characters
1062 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1063 callout verification, Exim cached a "reject" for the entire domain. This
1064 is correct for most verifications, but it is not correct for a recipient
1065 verification with use_sender or use_postmaster set, because in that case
1066 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1067 case of MAIL FROM:<> rejection from other early rejections (e.g.
1068 rejection of HELO). When verifying a recipient using a non-null MAIL
1069 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1070 Whatever the result of the callout, the value of the domain cache is
1071 left unchanged (for any other kind of callout, getting as far as trying
1072 RCPT means that the domain itself is ok).
1074 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1077 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1078 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1079 session, the daemon ignores ECONNECT errors and logs others; it now
1080 ignores EPIPE as well.
1082 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1083 (quoted-printable decoding).
1085 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1086 later the small subsequent patch to fix an introduced bug.
1088 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1090 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1092 PH/08 An error is now given if message_size_limit is specified negative.
1094 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1095 to be given (somewhat) arbitrary names.
1097 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1100 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1101 miscellaneous code fixes
1103 PH/10 Added the log_reject_target ACL modifier to specify where to log
1106 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1107 hostname. This is wrong, because it relates to the incoming message (and
1108 probably the interface on which it is arriving) and not to the outgoing
1109 callout (which could be using a different interface). This has been
1110 changed to use the value of the helo_data option from the smtp transport
1111 instead - this is what is used when a message is actually being sent. If
1112 there is no remote transport (possible with a router that sets up host
1113 addresses), $smtp_active_hostname is used.
1115 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1116 tweaks were necessary in order to get it to work (see also 21 below):
1117 (a) The code assumed that strncpy() returns a negative number on buffer
1118 overflow, which isn't the case. Replaced with Exim's string_format()
1120 (b) There were several signed/unsigned issues. I just did the minimum
1121 hacking in of casts. There is scope for a larger refactoring.
1122 (c) The code used strcasecmp() which is not a standard C function.
1123 Replaced with Exim's strcmpic() function.
1124 (d) The code set only $1; it now sets $auth1 as well.
1125 (e) A simple test gave the error "authentication client didn't specify
1126 service in request". It would seem that Dovecot has changed its
1127 interface. Fortunately there's a specification; I followed it and
1128 changed what the client sends and it appears to be working now.
1130 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1133 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1134 address A is aliased to B and C, where B exists and C does not. Without
1135 -v the output is "A verified" because verification stops after a
1136 successful redirection if more than one address is generated. However,
1137 with -v the child addresses are also verified. Exim was outputting "A
1138 failed to verify" and then showing the successful verification for C,
1139 with its parentage. It now outputs "B failed to verify", showing B's
1140 parentage before showing the successful verification of C.
1142 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1143 look up a TXT record in a specific list after matching in a combined
1146 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1147 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1148 they consult the DNS. I had assumed they would set it the way they
1149 wanted; and indeed my experiments on Linux seem to show that in some
1150 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1151 To be on the safe side, however, I have now made the interface to
1152 host_find_byname() similar to host_find_bydns(), with an argument
1153 containing the DNS resolver options. The host_find_byname() function now
1154 sets these options at its start, just as host_find_bydns() does. The smtp
1155 transport options dns_qualify_single and dns_search_parents are passed to
1156 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1157 of host_find_byname() use the default settings of RES_DEFNAMES
1158 (qualify_single) but not RES_DNSRCH (search_parents).
1160 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1161 spool_read_header() do less string testing, by means of a preliminary
1162 switch on the second character of optional "-foo" lines. (This is
1163 overdue, caused by the large number of possibilities that now exist.
1164 Originally there were few.) While I was there, I also converted the
1165 str(n)cmp tests so they don't re-test the leading "-" and the first
1166 character, in the hope this might squeeze out yet more improvement.
1168 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1169 flag allowing group syntax was set by the header_syntax check but not
1170 turned off, possible causing trouble later; (2) The flag was not being
1171 set at all for the header_verify test, causing "group"-style headers to
1172 be rejected. I have now set it in this case, and also caused header_
1173 verify to ignore an empty address taken from a group. While doing this, I
1174 came across some other cases where the code for allowing group syntax
1175 while scanning a header line wasn't quite right (mostly, not resetting
1176 the flag correctly in the right place). These bugs could have caused
1177 trouble for malformed header lines. I hope it is now all correct.
1179 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1180 with the "reply" argument non-NULL. The code, however (which originally
1181 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1182 but it didn't always do it. This confused somebody who was copying the
1183 code for some other use. I have removed all the tests.
1185 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1186 feature that was used to support insecure browsers during the U.S. crypto
1187 embargo. It requires special client support, and Exim is probably the
1188 only MTA that supported it -- and would never use it because real RSA is
1189 always available. This code has been removed, because it had the bad
1190 effect of slowing Exim down by computing (never used) parameters for the
1191 RSA_EXPORT functionality.
1193 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1194 authenticator to fail if there's a tab character in the incoming data
1195 (there should never be unless someone is messing about, as it's supposed
1196 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1197 if the connection is using TLS or if the remote IP is the same as the
1198 local IP, and the "valid-client-cert option" if a client certificate has
1201 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1202 authenticators. This can be used for authorization after authentication
1203 succeeds. (In the case of plaintext, it servers for both authentication
1206 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1207 if any retry times were supplied.
1209 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1210 connection, where there is no client IP address to check. In this
1211 situation, the verify now always succeeds.
1213 PH/25 Applied John Jetmore's -Mset patch.
1215 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1217 PH/27 In a string expansion for a processed (not raw) header when multiple
1218 headers of the same name were present, leading whitespace was being
1219 removed from all of them, but trailing whitespace was being removed only
1220 from the last one. Now trailing whitespace is removed from each header
1221 before concatenation. Completely empty headers in a concatenation (as
1222 before) are ignored.
1224 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1225 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1227 PH/29 [Removed. This was a change that I later backed out, and forgot to
1228 correct the ChangeLog entry (that I had efficiently created) before
1229 committing the later change.]
1231 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1232 address errors (4xx response to RCPT) over the same connection as other
1233 messages routed to the same hosts. Such deliveries are always "forced",
1234 so retry times are not inspected. This resulted in far too many retries
1235 for the affected addresses. The effect occurred only when there were more
1236 hosts than the hosts_max_try setting in the smtp transport when it had
1237 the 4xx errors. Those hosts that it had tried were not added to the list
1238 of hosts for which the message was waiting, so if all were tried, there
1239 was no problem. Two fixes have been applied:
1241 (i) If there are any address or message errors in an SMTP delivery, none
1242 of the hosts (tried or untried) are now added to the list of hosts
1243 for which the message is waiting, so the message should not be a
1244 candidate for sending over the same connection that was used for a
1245 successful delivery of some other message. This seems entirely
1246 reasonable: after all the message is NOT "waiting for some host".
1247 This is so "obvious" that I'm not sure why it wasn't done
1248 previously. Hope I haven't missed anything, but it can't do any
1249 harm, as the worst effect is to miss an optimization.
1251 (ii) If, despite (i), such a delivery is accidentally attempted, the
1252 routing retry time is respected, so at least it doesn't keep
1253 hammering the server.
1255 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1256 in ${readsocket because some servers need this prod.
1258 PH/32 Added some extra debug output when updating a wait-xxx database.
1260 PH/33 The hint "could be header name not terminated by colon", which has been
1261 given for certain expansion errors for a long time, was not being given
1262 for the ${if def:h_colon_omitted{... case.
1264 PH/34 The spec says: "With one important exception, whenever a domain list is
1265 being scanned, $domain contains the subject domain." There was at least
1266 one case where this was not true.
1268 PH/35 The error "getsockname() failed: connection reset by peer" was being
1269 written to the panic log as well as the main log, but it isn't really
1270 panic-worthy as it just means the connection died rather early on. I have
1271 removed the panic log writing for the ECONNRESET error when getsockname()
1274 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1275 runs only) independently of the message's sender address. This meant
1276 that, if the 4xx error was in fact related to the sender, a different
1277 message to the same recipient with a different sender could confuse
1278 things. In particualar, this can happen when sending to a greylisting
1279 server, but other circumstances could also provoke similar problems.
1280 I have changed the default so that the retry time for these errors is now
1281 based a combination of the sender and recipient addresses. This change
1282 can be overridden by setting address_retry_include_sender=false in the
1285 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1286 remote server are returned as part of bounce messages. This was not
1287 happening for LMTP over a pipe (the lmtp transport), but now it is the
1288 same for both kinds of LMTP.
1290 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1291 in header lines that were in fact CNAMEs. This is no longer the case.
1293 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1294 and queue runs started by the daemon processed all messages. This has
1295 been fixed so that -R and -S can now usefully be given with -q<time>.
1297 PH/40 Import PCRE release 6.7 (fixes some bugs).
1299 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1301 PH/42 Give an error if -q is specified more than once.
1303 PH/43 Renamed the variables $interface_address and $interface_port as
1304 $received_ip_address and $received_port, to make it clear that these
1305 values apply to message reception, and not to the outgoing interface when
1306 a message is delivered. (The old names remain recognized, of course.)
1308 PH/44 There was no timeout on the connect() call when using a Unix domain
1309 socket in the ${readsocket expansion. There now is.
1311 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1312 be meaningful with "accept".
1314 SC/01 Eximstats V1.43
1315 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1317 SC/02 Eximstats V1.44
1318 Use a glob alias rather than an array ref in the generated
1319 parser. This improves both readability and performance.
1321 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1322 Collect SpamAssassin and rejection statistics.
1323 Don't display local sender or destination tables unless
1324 there is data to show.
1325 Added average volumes into the top table text output.
1327 SC/04 Eximstats V1.46
1328 Collect data on the number of addresses (recipients)
1329 as well as the number of messages.
1331 SC/05 Eximstats V1.47
1332 Added 'Message too big' to the list of mail rejection
1333 reasons (thanks to Marco Gaiarin).
1335 SC/06 Eximstats V1.48
1336 Mainlog lines which have GMT offsets and are too short to
1337 have a flag are now skipped.
1339 SC/07 Eximstats V1.49 (Alain Williams)
1340 Added the -emptyok flag.
1342 SC/08 Eximstats V1.50
1343 Fixes for obtaining the IP address from reject messages.
1345 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1346 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1347 whitesspace changes from 4.64-PH/27
1349 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1352 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1353 are found, allow negative numbers in numeric criteria)
1355 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1357 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1358 to match changes made in 4.64-PH/43
1360 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1362 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1363 "domain" is actually an IP address, and force a failure. This locks out
1364 those revolvers/nameservers that support "A-for-A" lookups, in
1365 contravention of the specifications.
1367 PH/48 When a host name was looked up from an IP address, and the subsequent
1368 forward lookup of the name timed out, the host name was left in
1369 $sender_host_name, contrary to the specification.
1371 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1372 restricted to single-key lookups, Exim was not diagnosing an error if
1373 * or *@ was used with a query-style lookup.
1375 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1377 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1378 long ago, but noone interested enough thought of it. Let's just say that
1379 the "1.1" means that there are some new functions that weren't there at
1380 some point in the past.
1382 PH/51 Error processing for expansion failure of helo_data from an smtp
1383 transport during callout processing was broken.
1385 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1386 tested/used via the -bh/-bhc/-bs options.
1388 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1389 bug, fixed in subsequent PCRE releases).
1391 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1392 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1394 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1400 SC/01 Use a glob alias rather than an array ref in eximstats generated
1401 parser. This improves both readability and performance.
1403 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1404 Don't display local sender or destination tables in eximstats unless
1405 there is data to show.
1406 Added average volumes into the eximstats top table text output.
1408 SC/03 Collect data on the number of addresses (recipients) as well
1409 as the number of messages in eximstats.
1411 TF/01 Correct an error in the documentation for the redirect router. Exim
1412 does (usually) call initgroups() when daemonizing.
1414 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1415 with consistent privilege compared to when running as a daemon.
1417 TF/03 Note in the spec that $authenticated_id is not set for local
1418 submissions from trusted users.
1420 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1421 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1423 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1424 by adding some example configuration directives to the default
1425 configuration file. A little bit of work is required to uncomment the
1426 directives and define how usernames and passwords are checked, but
1427 there is now a framework to start from.
1429 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1430 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1431 without this. I don't know how relevant this is to other LDAP libraries.
1433 PH/02 Add the verb name to the "unknown ACL verb" error.
1435 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1437 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1439 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1440 directory not expanded when it should be if an expanded home directory
1441 was set for the address (which is overridden by the transport).
1443 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1446 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1447 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1448 because it is too late at that time, and has no effect.
1450 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1451 security issue with \' (bugzilla #107). I could not use the
1452 PQescapeStringConn() function, because it needs a PGconn value as one of
1455 PH/08 When testing addresses using -bt, indicate those final addresses that
1456 are duplicates that would not cause an additional delivery. At least one
1457 person was confused, thinking that -bt output corresponded to deliveries.
1458 (Suppressing duplicates isn't a good idea as you lose the information
1459 about possibly different redirections that led to the duplicates.)
1461 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1462 systems where poll() doesn't work, in particular OS X.
1464 PH/10 Added more information to debugging output for retry time not reached.
1466 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1467 operations in malware.c.
1469 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1472 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1473 syslog_duplication set false, log lines that would normally be written
1474 both the the main log and to the reject log were not written to syslog at
1477 PH/14 In the default configuration, change the use of "message" in ACL warn
1478 statements to "add_header".
1480 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1481 not followed by a command (e.g. "seen endif").
1483 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1484 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1487 PH/17 Added extra conditions to the default value of delay_warning_condition
1491 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1492 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1493 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1496 The Auto-Submitted: and various List- headers are standardised, whereas I
1497 don't think Precedence: ever was.
1499 PH/18 Refactored debugging code in route_finduser() to show more information,
1500 in particular, the error code if getpwnam() issues one.
1502 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1503 This is apparently needed in addition to the PH/07 change above to avoid
1504 any possible encoding problems.
1506 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1507 but not after initializing Perl.
1509 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1510 output them only if debugging. By default they are written stderr,
1511 apparently, which is not desirable.
1513 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1516 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1519 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1521 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1522 authenticated or an ident call has been made. Suppress the default
1523 values for $authenticated_id and $authenticated_sender (but permit -oMai
1524 and -oMas) when testing with -bh.
1526 PH/24 Re-jigged the order of the tests in the default configuration so that the
1527 tests for valid domains and recipients precede the DNS black list and CSA
1528 tests, on the grounds that those ones are more expensive.
1530 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1531 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1532 This bug exists in every version of Exim that I still have, right back to
1535 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1536 However, an attempt to turn on case-sensitivity in a regex key by
1537 including (?-i) didn't work because the subject string was already
1538 lowercased, and the effects were non-intuitive. It turns out that a
1539 one-line patch can be used to allow (?-i) to work as expected.
1545 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1546 other effects) broke the use of negated acl sub-conditions.
1548 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1551 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1552 "Deny" causes Exim to reject the incoming connection with a 554 error.
1553 Unfortunately, if there is a major crisis, such as a disk failure,
1554 tcp-wrappers gives "deny", whereas what one would like would be some
1555 kind of temporary error. A kludge has been added to help with this.
1556 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1557 554 error is used if errno is still zero or contains ENOENT (which occurs
1558 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1561 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1563 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1564 errors. Otherwise a message that provokes a temporary error (when other
1565 messages do not) can cause a whole host to time out.
1567 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1568 addresses were routed directly to files or pipes from a redirect router.
1569 File deliveries just didn't batch; pipe deliveries might have suffered
1572 PH/06 A failure to get a lock for a hints database would erroneously always say
1573 "Failed to get write lock", even when it was really a read lock.
1575 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1576 of 0600. This has been changed to use the value of the lockfile_mode
1577 option (which defaults to 0600).
1579 PH/08 Applied small patch from the Sieve maintainer.
1581 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1582 folder from quota calculations, a direct delivery into this folder messed
1583 up the contents of the maildirsize file. This was because the regex was
1584 used only to exclude .Trash (or whatever) when the size of the mailbox
1585 was calculated. There was no check that a delivery was happening into an
1586 excluded directory. This bug has been fixed by ignoring all quota
1587 processing for deliveries into excluded directories.
1589 PH/10 Added the maildirfolder_create_regex option to appendfile.
1595 PH/01 The code for finding all the local interface addresses on a FreeBSD
1596 system running IPv6 was broken. This may well have applied to all BSD
1597 systems, as well as to others that have similar system calls. The broken
1598 code found IPv4 interfaces correctly, but gave incorrect values for the
1599 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1600 that it would not match correctly against @[] and not recognize the IPv6
1603 PH/02 The ipliteral router was not recognizing addresses of the form user@
1604 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1606 PH/03 Added disable_ipv6.
1608 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1609 decoded form, because it is most often used to construct To: headers
1610 lines in autoreplies, and the decoded form may well be syntactically
1611 invalid. However, $reply_address has leading white space removed, and all
1612 newlines turned into spaces so that the autoreply transport does not
1615 PH/05 If group was specified without a user on a router, and no group or user
1616 was specified on a transport, the group from the router was ignored.
1618 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1619 for visible compile-time settings that can be used to change these
1620 numbers, for those that want even more. Backwards compatibility with old
1621 spool files has been maintained. However, going back to a previous Exim
1622 release will lost any variables that are in spool files.
1624 PH/07 Two small changes when running in the test harness: increase delay when
1625 passing a TCP/IP connection to a new process, in case the original
1626 process has to generate a bounce, and remove special handling of
1627 127.0.0.2 (sic), which is no longer necessary.
1629 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1630 be the same on different OS.
1632 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1635 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1636 whether --show-vars was specified or not
1638 JJ/02 exipick: Added support for new ACL variable spool format introduced
1641 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1642 syntactically invalid From: or Reply-to: line, and a filter used this to
1643 generate an autoreply, and therefore failed to obtain an address for the
1644 autoreply, Exim could try to deliver to a non-existent relative file
1645 name, causing unrelated and misleading errors. What now happens is that
1646 it logs this as a hard delivery error, but does not attempt to create a
1649 PH/11 The exinext utility has a -C option for testing purposes, but although
1650 the given file was scanned by exinext itself; it wasn't being passed on
1651 when Exim was called.
1653 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1654 an end-of-file indication when reading a command response.
1656 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1657 compiled. In many other places in Exim, IPv6 addresses are always
1658 recognized, so I have changed this. It also means that IPv4 domain
1659 literals of the form [IPV4:n.n.n.n] are now always recognized.
1661 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1662 used if the router is not running as root, for example, when verifying at
1663 ACL time, or when using -bh. The debugging output from this situation was
1664 non-existent - all you got was a failure to exec. I have made two
1667 (a) Failures to set uid/gid, the current directory, or a process leader
1668 in a subprocess such as that created by queryprogram now generate
1669 suitable debugging ouput when -d is set.
1671 (b) The queryprogram router detects when it is not running as root,
1672 outputs suitable debugging information if -d is set, and then runs
1673 the subprocess without attempting to change uid/gid.
1675 PH/15 Minor change to Makefile for building test_host (undocumented testing
1678 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1679 additional section of a DNS packet that returns MX or SRV records.
1680 Instead, it always explicitly searches for A/AAAA records. This avoids
1681 major problems that occur when a DNS server includes only records of one
1682 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1683 fixed another bug: if SRV records were looked up and the corresponding
1684 address records were *not* found in the additional section, the port
1685 values from the SRV records were lost.
1687 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1688 using the correct key (the original address) when searching the retry
1689 rules in order to find which one to use for generating the retry hint.
1691 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1692 adding the default one. Similarly, if it contains a Reply-To: header, the
1693 errors_reply_to option, if set, is not used.
1695 PH/19 When calculating a retry time, Exim used to measure the "time since
1696 failure" by looking at the "first failed" field in the retry record. Now
1697 it does not use this if it is later than than the arrival time of the
1698 message. Instead it uses the arrival time. This makes for better
1699 behaviour in cases where some deliveries succeed, thus re-setting the
1700 "first failed" field. An example is a quota failure for a huge message
1701 when small messages continue to be delivered. Without this change, the
1702 "time since failure" will always be short, possible causing more frequent
1703 delivery attempts for the huge message than are intended.
1704 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1706 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1707 $1, $2, $3) because the numerical variables can be reset during some
1708 expansion items (e.g. "match"), thereby losing the authentication data.
1710 PH/21 Make -bV show the size of off_t variables so that the test suite can
1711 decide whether to run tests for quotas > 2G.
1713 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1714 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1715 filecount value is greater than 2G or if a quota value is greater than 2G
1716 on a system where the size of off_t is not greater than 4, a panic error
1719 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1720 never match. The debug and -bh output now contains an explicit error
1721 message indicating a malformed IPv4 address or mask.
1723 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1724 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1725 PH/23 above applies.
1727 PH/25 Do not write to syslog when running in the test harness. The only
1728 occasion when this arises is a failure to open the main or panic logs
1729 (for which there is an explicit test).
1731 PH/26 Added the /no_tell option to "control=freeze".
1733 PH/27 If a host name lookup failed very early in a connection, for example, if
1734 the IP address matched host_lookup and the reverse lookup yielded a name
1735 that did not have a forward lookup, an error message of the form "no IP
1736 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1737 could be logged. Now it outputs the IP address instead of "NULL".
1739 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1740 allows the sender and the authenticated sender to be set when
1741 submitting a message from within Exim. Since child_open_exim() is
1742 documented for local_scan(), the new function should be too.
1744 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1745 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1746 results in an empty string is now treated as unset.
1748 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1750 PH/31 Added sender_verify_fail logging option.
1752 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1753 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1754 tidied the source and removed it altogether.
1756 PH/33 When a queue run was abandoned because the load average was too high, a
1757 log line was always written; now it is written only if the queue_run log
1758 selector is set. In addition, the log line for abandonment now contains
1759 information about the queue run such as the pid. This is always present
1760 in "start" and "stop" lines but was omitted from the "abandon" line.
1762 PH/34 Omit spaces between a header name and the colon in the error message that
1763 is given when verify = headers_syntax fails (if there are lots of them,
1764 the message gets confusing).
1766 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1767 names, as there are now some PTR records that contain slashes. This check
1768 is only to protect against broken name servers that fall over on strange
1769 characters, so the fact that it applies to all lookups doesn't matter.
1771 PH/36 Now that the new test suite is complete, we can remove some of the
1772 special code in Exim that was needed for the old test suite. For example,
1773 sorting DNS records because real resolvers return them in an arbitrary
1774 order. The new test suite's fake resolver always returns records in the
1777 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1778 bounces) except when queue_only is set, to avoid logging races between
1779 the different processes.
1781 PH/38 Panic-die if .include specifies a non-absolute path.
1783 PH/39 A tweak to the "H" retry rule from its user.
1785 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1786 a label. They prevented compilation on older perls.
1788 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1789 a warning to be raised on newish perls.
1791 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1792 on queue. Changes to match documented behaviour of showing count of
1793 messages matching specified criteria.
1795 PH/40 Changed the default ident timeout from 30s to 5s.
1797 PH/41 Added support for the use of login_cap features, on those BSD systems
1798 that have them, for controlling the resources used by pipe deliveries.
1800 PH/42 The content-scanning code uses fopen() to create files in which to put
1801 message data. Previously it was not paying any attention to the mode of
1802 the files. Exim runs with umask(0) because the rest of the code creates
1803 files with open(), and sets the required mode explicitly. Thus, these
1804 files were ending up world-writeable. This was not a big issue, because,
1805 being within the spool directory, they were not world-accessible. I have
1806 created a function called modefopen, which takes an additional mode
1807 argument. It sets umask(777), creates the file, chmods it to the required
1808 mode, then resets the umask. All the relevant calls to fopen() in the
1809 content scanning code have been changed to use this function.
1811 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1812 to 24 hours. This avoids potential overflow problems when processing G
1813 and H retry rules. I suspect nobody ever tinkers with this value.
1815 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1817 PH/45 When the plaintext authenticator is running as a client, the server's
1818 challenges are checked to ensure they are valid base64 strings. By
1819 default, the authentication attempt is cancelled if an invalid string is
1820 received. Setting client_ignore_invalid_base64 true ignores these errors.
1821 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1822 they are received. Thus, the responses can be made to depend on the
1823 challenges. If an invalid string is ignored, an empty string is placed in
1826 PH/46 Messages that are created by the autoreply transport now contains a
1827 References: header, in accordance with RFCs 2822 and 3834.
1829 PH/47 Added authenticated_sender_force to the smtp transport.
1831 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1833 PH/49 Installed latest patch from the Sieve maintainer.
1835 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1836 was also set, the appendfile transport was unnecessarily scanning a
1837 directory of message files (e.g. for maildir delivery) to find the count
1838 of files (along with the size), even though it did not need this
1839 information. It now does the scan only if it needs to find either the
1840 size of the count of files.
1842 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1844 PH/52 Two bugs concerned with error handling when the smtp transport is
1847 (i) Exim was not creating retry information for temporary errors given
1848 for individual recipients after the DATA command when the smtp transport
1849 was used in LMTP mode. This meant that they could be retried too
1850 frequently, and not timed out correctly.
1852 (ii) Exim was setting the flag that allows error details to be returned
1853 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1854 recipients that were returned after the DATA command.
1856 PH/53 This is related to PH/52, but is more general: for any failing address,
1857 when detailed error information was permitted to be returned to the
1858 sender, but the error was temporary, then after the final timeout, only
1859 "retry timeout exceeded" was returned. Now it returns the full error as
1860 well as "retry timeout exceeded".
1862 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1863 do this, and (what is worse) MTAs that accept it.
1865 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1866 will now be deprecated.
1868 PH/56 New os.c-cygwin from the Cygwin maintainer.
1870 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1871 formats (previously only available in exim formats via -bpr, -bpru,
1872 and -bpra. Now also available in native and exiqgrep formats)
1874 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1875 with very large, slow to parse queues
1877 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1879 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1881 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1882 responses to authentication challenges, though it was showing the
1883 challenges; (ii) I've removed the CR characters from the debug output for
1886 PH/58 Allow for the insertion of a newline as well as a space when a string
1887 is turned into more than one encoded-word during RFC 2047 encoding. The
1888 Sieve code now uses this.
1890 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1891 data_4xx, lost_connection, tls_required.
1893 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1894 message was being sent as an SMTP response.
1896 PH/61 Add -l and -k options to exicyclog.
1898 PH/62 When verifying, if an address was redirected to one new address, so that
1899 verification continued, and the new address failed or deferred after
1900 having set something in $address_data, the value of $address_data was not
1901 passed back to the ACL. This was different to the case when no
1902 redirection occurred. The value is now passed back in both cases.
1904 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1905 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1906 use login_cap.h, so on its own it isn't the distinguishing feature. The
1907 new name refers directly to the setclassresources() function.
1909 PH/65 Added configuration files for NetBSD3.
1911 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1913 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1914 is preferred over IPv4.
1916 PH/68 The bounce_return_message and bounce_return_body options were not being
1917 honoured for bounces generated during the reception of non-SMTP messages.
1918 In particular, this applied to messages rejected by the ACL. This bug has
1919 been fixed. However, if bounce_return_message is true and bounce_return_
1920 body is false, the headers that are returned for a non-SMTP message
1921 include only those that have been read before the error was detected.
1922 (In the case of an ACL rejection, they have all been read.)
1924 PH/69 The HTML version of the specification is now built in a directory called
1925 spec_html instead of spec.html, because the latter looks like a path with
1926 a MIME-type, and this confuses some software.
1928 PH/70 Catch two compiler warnings in sieve.c.
1930 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1931 function verify_get_ident() calls ip_connect() to connect a socket, but
1932 if the "connect()" function timed out, ip_connect() used to close the
1933 socket. However, verify_get_ident() also closes the socket later, and in
1934 between Exim writes to the log, which may get opened at this point. When
1935 the socket was closed in ip_connect(), the log could get the same file
1936 descriptor number as the socket. This naturally causes chaos. The fix is
1937 not to close the socket in ip_connect(); the socket should be closed by
1938 the function that creates it. There was only one place in the code where
1939 this was missing, in the iplookup router, which I don't think anybody now
1940 uses, but I've fixed it anyway.
1942 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1943 well as to direct DNS lookups. Otherwise the handling of names in host
1944 lists is inconsistent and therefore confusing.
1950 PH/01 Two changes to the default runtime configuration:
1952 (1) Move the checks for relay_from_hosts and authenticated clients from
1953 after to before the (commented out) DNS black list checks.
1955 (2) Add control=submission to the relay_from_hosts and authenticated
1956 clients checks, on the grounds that messages accepted by these
1957 statements are most likely to be submissions.
1959 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1961 (1) Generate an error if the third argument for the ${prvs expansion is
1964 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1967 (3) Reset the variables that are obtained from the first argument of
1968 ${prvscheck and used in the second argument before leaving the code,
1969 because their memory is reclaimed, so using them afterwards may do
1972 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1973 one (it's much easier than Tom thought :-).
1975 (5) Because of (4), we can now allow for the use of $prvscheck_result
1976 inside the third argument.
1978 PH/03 For some reason, the default setting of PATH when running a command from
1979 a pipe transport was just "/usr/bin". I have changed it to
1982 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1983 anything to be listed in the output from -bV.
1985 PH/05 When a filter generated an autoreply, the entire To: header line was
1986 quoted in the delivery log line, like this:
1988 => >A.N.Other <ano@some.domain> <original@ddress> ...
1990 This has been changed so that it extracts the operative address. There
1991 may be more than one such address. If so, they are comma-separated, like
1994 => >ano@some.domain,ona@other.domain <original@ddress> ...
1996 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1997 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1998 not being looked up in the rDNS to get a host name, Exim was showing the
1999 IP address twice in Received: lines, even though the IP addresses were
2000 identical. For example:
2002 Received: from [1.2.3.4] (helo=[1.2.3.4])
2004 However, if the real host name was known, it was omitting the HELO data
2005 if it matched the actual IP address. This has been tidied up so that it
2006 doesn't show the same IP address twice.
2008 PH/07 When both +timestamp and +memory debugging was on, the value given by
2009 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2010 called by the debug printing, thereby overwriting the timestamp buffer.
2011 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2013 PH/08 When the original message was included in an autoreply transport, it
2014 always said "this is a copy of the message, including all the headers",
2015 even if body_only or headers_only was set. It now gives an appropriate
2018 PH/09 Applied a patch from the Sieve maintainer which:
2020 o fixes some comments
2021 o adds the (disabled) notify extension core
2022 o adds some debug output for the result of if/elsif tests
2023 o points to the current vacation draft in the documentation
2024 and documents the missing references header update
2028 o fixes a bug in processing the envelope test (when testing
2029 multiple envelope elements, the last element determinted the
2032 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2033 Electronic Mail") by including:
2035 Auto-submitted: auto-generated
2037 in the messages that it generates (bounce messages and others, such as
2038 warnings). In the case of bounce messages for non-SMTP mesages, there was
2039 also a typo: it was using "Auto_submitted" (underscore instead of
2040 hyphen). Since every message generated by Exim is necessarily in response
2041 to another message, thes have all been changed to:
2043 Auto-Submitted: auto-replied
2045 in accordance with these statements in the RFC:
2047 The auto-replied keyword:
2049 - SHOULD be used on messages sent in direct response to another
2050 message by an automatic process,
2052 - MUST NOT be used on manually-generated messages,
2054 - MAY be used on Delivery Status Notifications (DSNs) and Message
2055 Disposition Notifications (MDNs),
2057 - MUST NOT be used on messages generated by automatic or periodic
2058 processes, except for messages which are automatic responses to
2061 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2062 to the default Received: header definition.
2064 PH/12 Added log selector acl_warn_skipped (default on).
2066 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2067 variables because (a) they are in the wrong storage pool and (b) even if
2068 they were copied, it wouldn't work properly because of the caching.
2070 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2071 checking when decoding. Apparently there are clients that generate
2072 overlong encoded strings. Why am I not surprised?
2074 PH/15 If the first argument of "${if match_address" was not empty, but did not
2075 contain an "@" character, Exim crashed. Now it writes a panic log message
2076 and treats the condition as false.
2078 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2080 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2081 extension "envelope-auth". The code is finished and in agreement with
2082 other implementations, but there is no documentation so far and in fact,
2083 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2084 not changing the active code.
2086 Print executed "if" and "elsif" statements when debugging is used. This
2087 helps a great deal to understand what a filter does.
2089 Document more things not specified clearly in RFC3028. I had all this
2090 sorted out, when out of a sudden new issues came to my mind. Oops."
2092 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2095 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2096 canonical form (as documented). However, after a host name lookup from
2097 the IP address, check_host() was doing a simple string comparison with
2098 addresses acquired from the DNS when checking that the found name did
2099 have the original IP as one of its addresses. Since any found IPv6
2100 addresses are likely to be in abbreviated form, the comparison could
2101 fail. Luckily, there already exists a function for doing the comparison
2102 by converting both addresses to binary, so now that is used instead of
2103 the text comparison.
2105 PH/20 There was another similar case to PH/19, when a complete host name was
2106 given in a host list; looking up its IP address could give an abbreviated
2107 form, whereas the current host's name might or might not be abbreviated.
2108 The same fix has been applied.
2114 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2115 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2118 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2119 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2121 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2123 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2124 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2125 Also, for "Auto-Submitted", treat anything other than "no" as
2126 non-personal, in accordance with RFC 3834. (Previously it treated
2127 anything starting "auto-" as non-personal.)
2129 TF/01 The control=submission/name=... option had a problem with syntax
2130 errors if the name included a slash character. The /name= option
2131 now slurps the rest of the string, so it can include any characters
2132 but it must come last in the list of options (after /sender_retain
2135 PH/05 Some modifications to the interface to the fake nameserver for the new
2143 TK/01 Added the "success_on_redirect" address verification option. See
2144 NewStuff for rationale and an example.
2146 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2148 PH/02 Patch to exigrep to allow it to work on syslog lines.
2150 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2151 fread() to skip over the body file's header line, because in Cygwin the
2152 header line is locked and is inaccessible.
2154 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2155 co-exist for some time) to make it clear that it is the Exim ID that is
2156 referenced, not the Message-ID: header line.
2158 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2159 string_format() function, because snprintf() does not exist on all
2162 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2163 ${stat: expansion item.
2165 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2166 protocol synchronization error", to keep the pedants happy.
2168 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2169 well as for IRIX systems, when gcc is being used. See the host.c source
2172 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2174 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2177 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2178 transport and to the smtp transport in LMTP mode.
2180 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2182 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2183 run a filter in a subprocess. This could lead to confusion in subsequent
2184 lookups in the parent process. There should also be a search_tidyup() at
2185 the end of the subprocess.
2187 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2188 only if the host matched helo_try_verify_hosts, which caused the
2189 verification to occur when the EHLO/HELO command was issued. The ACL just
2190 tested the remembered result. Now, if a previous verification attempt has
2191 not happened, "verify = helo" does it there and then.
2193 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2195 TK/03 Fix log output including CR from clamd.
2197 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2198 exist provoked a memory error which could cause a segfault.
2200 PH/15 Installed PCRE 6.2
2202 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2204 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2205 of the problem. Specifically, suggested +O2 rather than +O1 for the
2208 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2210 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2211 record, the port was not correctly logged when the outgoing_port log
2212 selector was set (it logged the transort's default port).
2214 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2215 fallback_hosts, and "hosts" in the smtp transport.
2217 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2218 host errors such as "Connection refused".
2220 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2221 authentication with radiusclient 0.4.9:
2223 - Error returned from rc_read_config was caught wrongly
2224 - Username/password not passed on to radius server due to wrong length.
2226 The presumption is that some radiusclient API changes for 4.51/PH/17
2227 were not taken care of correctly. The code is still untested by me (my
2228 Linux distribution still has 0.3.2 of radiusclient), but it was
2229 contributed by a Radius user.
2231 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2232 expanding the "port" option of the smtp transport.
2234 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2235 while reading a MIME header. Thanks to Tom Hughes for a patch.
2237 PH/24 Include config.h inside local_scan.h so that configuration settings are
2240 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2241 that in an ACL for RCPT (for example), you can examine exactly what was
2244 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2245 commands, but it was not correctly comparing the address with the actual
2246 client host address. Thus, it would show the EHLO address in Received:
2247 header lines when this was not necessary.
2249 PH/27 Added the % operator to ${eval:}.
2251 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2252 it should be ignoring failures (because with -C, for example, it has lost
2253 privilege). It wasn't ignoring creation failures other than "already
2256 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2259 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2260 because an input line was too long, either on its own, or by virtue of
2261 too many continuations, the temporary file was not being removed, and the
2262 return code was incorrect.
2264 PH/31 Missing "BOOL" in function definition in filtertest.c.
2266 PH/32 Applied Sieve patches from the maintainer.
2268 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2270 PH/33 Added "verify = not_blind".
2272 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2273 Local/Makefile (with some defaults set). These are used in built scripts
2274 such as exicyclog, but they have never been used in the exim_install
2275 script (though there are many overriding facilities there). I have
2276 arranged that the exim_install script now takes note of these two
2279 PH/35 Installed configuration files for Dragonfly.
2281 PH/36 When a locally submitted message by a trusted user did not contain a
2282 From: header, and the sender address was obtained from -f or from an SMTP
2283 MAIL command, and the trusted user did not use -F to supply a sender
2284 name, $originator_name was incorrectly used when constructing a From:
2285 header. Furthermore, $originator_name was used for submission mode
2286 messages from external hosts without From: headers in a similar way,
2287 which is clearly wrong.
2289 PH/37 Added control=suppress_local_fixups.
2291 PH/38 When log_selector = +received_sender was set, and the addition of the
2292 sender made the log line's construction buffer exactly full, or one byte
2293 less than full, an overflow happened when the terminating "\n" was
2296 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2297 when the result of a list match is failure because a DNS lookup failed.
2299 PH/40 RM_COMMAND is now used in the building process.
2301 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2302 the "build-* directories that it finds.
2304 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2305 address in a domain literal was a prefix of an interface address.
2307 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2308 when verifying a sender address, unless rewrite_headers is false.
2310 PH/44 Wrote a long comment about why errors_to addresses are verified as
2311 recipients, not senders.
2313 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2314 the ratelimit ACL was added.
2316 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2318 PH/46 Added extra information about PostgreSQL errors to the error string.
2320 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2321 avoiding the need to install special zones in a real server. This is
2322 backwards compatible; if it can't find the fake resolver, it drops back.
2323 Thus, both old and new test suites can be run.
2325 TF/02 Added util/ratelimit.pl
2327 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2328 clock is set back in time.
2330 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2331 Candler <B.Candler@pobox.com>.
2333 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2334 OK for addresses that are the result of redirections.
2336 PH/48 A number of further additions for the benefit of the new test suite,
2337 including a fake gethostbyname() that interfaces to the fake DNS resolver
2340 TF/06 The fix for widen_domains has also been applied to qualify_single and
2341 search_parents which are the other dnslookup options that can cause
2344 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2347 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2349 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2350 service" if it encountered an MX record with an empty target hostname.
2351 The message is now "an MX or SRV record indicated no SMTP service".
2353 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2354 if the DNS of the sending site is misconfigured. This is quite a
2355 common situation. This change restores the behaviour of treating a
2356 helo verification defer as a failure.
2358 PH/51 If self=fail was set on a router, the bounce message did not include the
2359 actual error message.
2365 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2367 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2368 command itself ended in error, the underlying message about the transport
2369 filter timeout was being overwritten with the pipe command error. Now the
2370 underlying error message should be appended to the second error message.
2372 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2374 PH/02 Reduce the amount of output that "make" produces by default. Full output
2375 can still be requested.
2377 PH/03 The warning log line about a condition test deferring for a "warn" verb
2378 was being output only once per connection, rather than after each
2379 occurrence (because it was using the same function as for successful
2380 "warn" verbs). This seems wrong, so I have changed it.
2382 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2383 it should not have, which might have caused a crash in the right
2384 circumstances, but probably never did.
2386 PH/04 Installed a modified version of Tony Finch's patch to make submission
2387 mode fix the return path as well as the Sender: header line, and to
2388 add a /name= option so that you can make the user's friendly name appear
2391 TF/03 Added the control = fakedefer ACL modifier.
2393 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2394 Mark Lowes for thorough testing.
2396 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2398 TK/03 Merged latest SRS patch from Miles Wilton.
2400 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2401 with the definition in sysexits.h (which is #included earlier).
2402 Fortunately, Exim does not actually use EX_OK. The code used to try to
2403 preserve the sysexits.h value, by assumimg that macro definitions were
2404 scanned for macro replacements. I have been disabused of this notion,
2405 so now the code just undefines EX_OK before #including unistd.h.
2407 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2408 in the smtp transport. When a block could not be written in a single
2409 write() function, the timeout was being re-applied to each part-write.
2410 This seems wrong - if the receiver was accepting one byte at a time it
2411 would take for ever. The timeout is now adjusted when this happens. It
2412 doesn't have to be particularly precise.
2414 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2415 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2417 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2418 without a domain if the check to <postmaster@domain> fails.
2420 SC/01 Eximstats: added -xls and the ability to specify output files
2421 (patch written by Frank Heydlauf).
2423 SC/02 Eximstats: use FileHandles for outputing results.
2425 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2427 SC/04 Eximstats: fixed display of large numbers with -nvr option
2429 SC/05 Eximstats: fixed merging of reports with empty tables.
2431 SC/06 Eximstats: added the -include_original_destination flag
2433 SC/07 Eximstats: removed tabs and trailing whitespace.
2435 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2437 TK/06 MBOX spool code: Add real "From " MBOX separator line
2438 so the .eml file is really in mbox format (even though
2439 most programs do not really care). Patch from Alex Miller.
2441 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2442 The latter is generated from $received_to and is only set if the
2443 message has one envelope recipient. SA can use these headers,
2444 obviously out-of-the-box. Patch from Alex Miller.
2446 PH/08 The ${def test on a variable was returning false if the variable's
2447 value was "0", contrary to what the specification has always said!
2448 The result should be true unless the variable is empty.
2450 PH/09 The syntax error of a character other than { following "${if
2451 def:variable_name" (after optional whitespace) was not being diagnosed.
2452 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2453 accidental colon was present, for example, could give incorrect results.
2455 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2456 result is used (not including appendfile, where other changes are about
2459 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2460 This involved changing a lot of size variables from int to off_t. It
2461 should work with maildirs and everything.
2463 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2464 spamd dying while we are connected to it.
2466 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2469 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2470 function for BDB 4.3.
2472 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2474 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2475 the sources for PCRE have been re-arranged and more files are now
2478 PH/15 The code I had for printing potentially long long variables in PH/11
2479 above was not the best (it lost precision). The length of off_t variables
2480 is now inspected at build time, and an appropriate printing format (%ld
2481 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2482 to be "long long int" or "long int". This is needed for the internal
2483 formatting function string_vformat().
2485 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2486 the configuration file to be ":syslog", then the script "guesses" where
2487 the logs files are, rather than using the compiled in default. In our
2488 case the guess is not the same as the compiled default, so the script
2489 suddenly stopped working when I started to use syslog. The patch checks
2490 to see if log_file_path is "". If so, it attempts to read it from exim
2491 with no configuration file to get the compiled in version, before it
2492 falls back to the previous guessing code."
2494 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2495 implementing BATV in an Exim configuration. See NewStuff for the gory
2498 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2499 Makefile that are specific to HP-UX.
2501 PH/18 If the "use_postmaster" option was set for a recipient callout together
2502 with the "random" option, the postmaster address was used as the MAIL
2503 FROM address for the random test, but not for the subsequent recipient
2504 test. It is now used for both.
2506 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2507 patch removes a few documentation additions to RFC 3028, because the
2508 latest draft now contains them. It adds the new en;ascii-case comparator
2509 and a new error check for 8bit text in MIME parts. Comparator and
2510 require names are now matched exactly. I enabled the subaddress
2511 extension, but it is not well tested yet (read: it works for me)."
2513 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2514 rework some of the code of TK/09 above to avoid the hardwired use of
2515 "%lld" and "long long". Replaced the call to snprintf() with a call to
2518 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2519 records point to non-existent hosts", "retry timeout exceeded", and
2520 "retry time not reached for any host after a long failure period".
2522 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2523 experimental DomainKeys support:
2525 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2526 (2) On an error such as an illegally used "control", the wrong name for
2527 the control was given.
2529 These problems did NOT occur unless DomainKeys support was compiled.
2531 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2533 PH/24 Added ${if match_ip condition.
2535 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2536 databases so that it will be absolutely obvious if a crash occurs in the
2537 DB library. This is a regular occurrence (often caused by mis-matched
2540 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2541 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2542 picked up on a user's system that detects such things. There doesn't seem
2543 to be a gcc warning option for this - only an attribute that has to be
2544 put on the function's prototype. It seems that in Fedora Core 4 they have
2545 set this on a number of new functions. No doubt there will be more in due
2548 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2549 specify a transport. However, if an address that was verified by such a
2550 router was the subject of a callout, Exim crashed because it tried to
2551 read the rcpt_include_affixes from the non-existent transport. Now it
2552 just assumes that the setting of that option is false. This bug was
2553 introduced by 4.51/PH/31.
2555 PH/28 Changed -d+all to exclude +memory, because that information is very
2556 rarely of interest, but it makes the output a lot bigger. People tend to
2557 do -d+all out of habit.
2559 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2560 code in os-type was giving problems when libc.so lives in lib64, like on
2563 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2564 aren't the modern standard, and it seems that some systems' include files
2565 don't always have them. Exim was already checking for some of the newer
2566 ones like T_AAAA, and defining it itself. I've added checks for all the
2567 record types that Exim uses.
2569 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2570 not automatically generating a new one, as it is supposed to. This
2571 prevented TLS from working. If the file did exist, but contained invalid
2572 data, a new version was generated, as expected. It was only the case of a
2573 non-existent file that was broken.
2575 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2576 with a change in libdomainkeys > 0.64.
2578 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2579 from DNS. If the selector record carries the flag, it now has
2580 precedence over the domain-wide flag.
2582 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2584 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2585 the use of a port name that isn't defined in /etc/services) occurred, the
2586 message was deferred as in a normal delivery, and thus remained on the
2587 spool, instead of being failed because of the mua_wrapper setting. This
2588 is now fixed, and I tidied up some of the mua_wrapper messages at the
2591 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2592 the messages in a hash of arrays rather than using individual hashes.
2593 This is a bit cleaner and results in dramatic memory savings, albeit
2594 at a slight CPU cost.
2596 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2597 as requested by Marc Sherman.
2599 SC/10 Eximstats: added histograms for user specified patterns as requested
2602 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2604 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2605 fopen() in the content-scanning modules that did not already have it.
2611 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2612 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2614 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2616 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2618 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2619 to test Sieve filters that use "vacation".
2621 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2622 that changes the way the GnuTLS parameters are stored in the cache file.
2623 The new format can be generated externally. For backward compatibility,
2624 if the data in the cache doesn't make sense, Exim assumes it has read an
2625 old-format file, and it generates new data and writes a new file. This
2626 means that you can't go back to an older release without removing the
2629 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2630 work if there are any delivery delays because "one_time" forces the
2631 parent to be marked "delivered", so its unseen clone is never tried
2632 again. For this reason, Exim now forbids the simultaneous setting of
2635 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2636 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2637 entry if you want to know the details. The fix, however, neglected to
2638 consider the case when local delivery batching is involved. The test for
2639 "previously delivered" was not happening when checking to see if an
2640 address could be batched with a previous (undelivered) one; under
2641 certain circumstances this could lead to multiple deliveries to the same
2644 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2645 in its include files, and this causes problems building Exim.
2647 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2648 header_syntax) but Exim was just ignoring anything given after a slash.
2649 In particular, this caused confusion with an attempt to use "verify =
2650 reverse_host_lookup/defer_ok". An error is now given when options are
2651 supplied for verify items that do not have them. (Maybe reverse_host_
2652 lookup should have a defer_ok option, but that's a different point.)
2654 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2655 defined by RFC 821) to 2048, because there were problems with some AUTH
2656 commands, and RFC 1869 says the size should be increased for extended
2657 SMTP commands that take arguments.
2659 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2662 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2663 "unknown" error; now it says that the functionality isn't in the binary.
2665 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2666 an address' error message when a string expansion fails (syntax or
2667 whatever). Otherwise the password may appear in the log. Following change
2668 PH/42 below, there is no longer a chance of it appearing in a bounce
2671 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2673 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2674 of its addresses was ever tried. (Bugzilla bug #2.)
2676 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2677 the result incorrectly in the debug output. (It correctly added a newline
2678 to what was transported.)
2680 TF/01 Added $received_time.
2682 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2683 commented out examples of how to interface to a virus scanner and to
2684 SpamAssassin. Also added commented examples of av_scanner and
2685 spamd_address settings.
2687 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2688 and controls are allowed in which ACLs. There were a couple of minor
2689 errors. Some of the entries in the conditions table (which is a table of
2690 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2691 negation of where the condition IS allowed.
2693 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2695 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2696 header file does not have a version number, so I've had to invent a new
2697 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2698 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2699 radiusclient), but it was contributed by a Radius user.
2701 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2702 files or directories, for OpenSSL.
2704 PH/19 When an Exim process that is running as root has to create an Exim log
2705 file, it does so in a subprocess that runs as exim:exim so as to get the
2706 ownership right at creation (otherwise, other Exim processes might see
2707 the file with the wrong ownership). There was no test for failure of this
2708 fork() call, which would lead to the process getting stuck as it waited
2709 for a non-existent subprocess. Forks do occasionally fail when resources
2710 run out. I reviewed all the other calls to fork(); they all seem to check
2713 PH/20 When checking for unexpected SMTP input at connect time (before writing
2714 the banner), Exim was not dealing correctly with a non-positive return
2715 from the read() function. If the client had disconnected by this time,
2716 the result was a log entry for a synchronization error with an empty
2717 string after "input=" when read() returned zero. If read() returned -1
2718 (an event I could not check), uninitialized data bytes were printed.
2719 There were reports of junk text (parts of files, etc) appearing after
2722 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2724 PH/22 Added support for macro redefinition, and (re)definition in between
2725 driver and ACL definitions.
2727 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2728 forgetting to use the resulting value; it was using the unexpanded value.
2730 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2731 hadn't been configured. The fix is from Juergen Kreileder, who
2732 understands it better than I do:
2734 "Here's what I see happening with three configured cyrus_sasl
2735 authenticators configured (plain, login, cram-md5):
2737 On startup auth_cyrus_sasl_init() gets called for each of these.
2738 This means three calls to sasl_listmech() without a specified mech_list.
2739 => SASL tests which mechs of all available mechs actually work
2740 => three warnings about OTP not working
2741 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2743 With the patch, sasl_listmech() also gets called three times. But now
2744 SASL's mech_list option is set to the server_mech specified in the the
2745 authenticator. Or in other words, the answer from sasl_listmech()
2746 gets limited to just the mech you're testing for (which is different
2748 => the return list contains just 'plain' or 'login', 'cram-md5' or
2749 nothing depending on the value of ob->server_mech.
2751 I've just tested the patch: Authentication still works fine,
2752 unavailable mechs specified in the exim configuration are still
2753 caught, and the auth.log warnings about OTP are gone."
2755 PH/25 When debugging is enabled, the contents of the command line are added
2756 to the debugging output, even when log_selector=+arguments is not
2759 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2760 answer is "GNU", and only if the return is "GNU/something" is the answer
2763 PH/27 $acl_verify_message is now set immediately after the failure of a
2764 verification in an ACL, and so is available in subsequent modifiers. In
2765 particular, the message can be preserved by coding like this:
2767 warn !verify = sender
2768 set acl_m0 = $acl_verify_message
2770 Previously, $acl_verify_message was set only while expanding "message"
2771 and "log_message" when a very denied access.
2773 PH/28 Modified OS/os.c-Linux with
2775 -#ifndef OS_LOAD_AVERAGE
2776 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2778 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2779 nomenclature these days.)
2781 PH/29 Installed patch from the Sieve maintainer that adds the options
2782 sieve_useraddress and sieve_subaddress to the redirect router.
2784 PH/30 In these circumstances:
2785 . Two addresses routed to the same list of hosts;
2786 . First host does not offer TLS;
2787 . First host accepts first address;
2788 . First host gives temporary error to second address;
2789 . Second host offers TLS and a TLS session is established;
2790 . Second host accepts second address.
2791 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2792 and peerdn, if requested) that were in fact used only for the second
2795 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2796 attention to any local part prefix or suffix that was matched by the
2797 router that accepted the address. It now behaves in the same way as it
2798 does for delivery: the affixes are removed from the local part unless
2799 rcpt_include_affixes is set on the transport.
2801 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2802 timeout during the DATA phase of an incoming message.
2804 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2805 applied a patch sanctioned by the Sieve maintainer.
2807 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2808 the uid or gid is negative. A case of a negative gid caused this to be
2809 noticed. The fix allows for either to be negative.
2811 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2812 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2815 PH/36 The change PH/12 above was broken. Fixed it.
2817 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2818 the grounds that routing the same address twice would always produce the
2819 same answer. This might have been true once, but it is certainly no
2820 longer true now. Routing a child address may depend on the previous
2821 routing that produced that child. Some complicated redirection strategies
2822 went wrong when messages had multiple recipients, and made Exim's
2823 behaviour dependent on the order in which the addresses were given.
2825 I have moved the duplicate checking until after the routing is complete.
2826 Exim scans the addresses that are assigned to local and remote
2827 transports, and removes any duplicates. This means that more work will be
2828 done, as duplicates will always all be routed, but duplicates are
2829 presumably rare, so I don't expect this is of any significance.
2831 For deliveries to pipes, files, and autoreplies, the duplicate checking
2832 still happens during the routing process, since they are not going to be
2835 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2836 It corrects a timeout issue with spamd. This is Ian's comment: "The
2837 background is that sometimes spamd either never reads data from a
2838 connection it has accepted, or it never writes response data. The exiscan
2839 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2840 blindly assumes that writes won't block so it may never time out."
2842 PH/39 Allow G after quota size as well as K and M.
2844 PH/40 The value set for $authenticated_id in an authenticator may not contain
2845 binary zeroes or newlines because the value is written to log lines and
2846 to spool files. There was no check on this. Now the value is run through
2847 the string_printing() function so that such characters are converted to
2848 printable escape sequences.
2850 PH/41 $message_linecount is a new variable that contains the total number of
2851 lines in the message. Compare $body_linecount, which is the count for the
2854 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2855 bounce and delay warning messages, except in certain special cases, which
2858 (a) An SMTP error message from a remote host;
2859 (b) A message specified in a :fail: redirection;
2860 (c) A message specified in a "fail" command in a system filter;
2861 (d) A message specified in a FAIL return from the queryprogram router;
2862 (e) A message specified by the cannot_route_message router option.
2864 In these cases only, Exim does include the error details in bounce and
2865 warning messages. There are also a few cases where bland messages such
2866 as "unrouteable address" or "local delivery error" are given.
2868 PH/43 $value is now also set for the "else" part of a ${run expansion.
2870 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2871 being worked on, but at least Exim now implements the latest version to
2874 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2875 process to complete was treated as a delivery failure, a timeout while
2876 writing the message to the pipe was logged, but erroneously treated as a
2877 successful delivery. Such timeouts include transport filter timeouts. For
2878 consistency with the overall process timeout, these timeouts are now
2879 treated as errors, giving rise to delivery failures by default. However,
2880 there is now a new Boolean option for the pipe transport called
2881 timeout_defer, which, if set TRUE, converts the failures into defers for
2882 both kinds of timeout. A transport filter timeout is now identified in
2885 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2886 systems where "make" and "gmake" are different, calling "gmake" at top
2887 level broke things. I've arranged for the value of $(MAKE) to be passed
2888 from the Makefile to this script so that it can call the same version of
2892 A note about Exim versions 4.44 and 4.50
2893 ----------------------------------------
2895 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2896 changes of various kinds. As a consequence, a big documentation update was
2897 needed. This delayed the release for rather longer than seemed good, especially
2898 in the light of a couple of (minor) security issues. Therefore, the changes
2899 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2900 release. So 4.44 and 4.50 are in effect two different branches that both start
2903 I have left the 4.50 change log unchanged; it contains all the changes since
2904 4.43. The change log for 4.44 is below; many of its items are identical to
2905 those for 4.50. This seems to be the most sensible way to preserve the
2906 historical information.
2912 1. Minor wording change to the doc/README.SIEVE file.
2914 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2915 computation of the current number of files was incorrect.
2917 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2918 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2921 4. Give more explanation in the error message when the command for a transport
2922 filter fails to execute.
2924 5. There are several places where Exim runs a non-Exim command in a
2925 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2926 was being done only for the command run by the queryprogram router. It is
2927 now done for all such subprocesses. The other cases are: ${run, transport
2928 filters, and the commands run by the lmtp and pipe transports.
2930 6. Added CONFIGURE_GROUP build-time option.
2932 7. Some older OS have a limit of 256 on the maximum number of file
2933 descriptors. Exim was using setrlimit() to set 1000 as a large value
2934 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2935 systems. I've change it so that if it can't get 1000, it tries for 256.
2937 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2938 was an oversight, and furthermore, ever since the addition of extra
2939 controls (e.g. 4.43/32), the checks on when to allow different forms of
2940 "control" were broken. There should now be diagnostics for all cases when a
2941 control that does not make sense is encountered.
2943 9. Added the /retain_sender option to "control=submission".
2945 10. $recipients is now available in the predata ACL (oversight).
2947 11. Tidy the search cache before the fork to do a delivery from a message
2948 received from the command line. Otherwise the child will trigger a lookup
2949 failure and thereby defer the delivery if it tries to use (for example) a
2950 cached ldap connection that the parent has called unbind on.
2952 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2953 of $address_data from the recipient verification was clobbered by the
2954 sender verification.
2956 13. The value of address_data from a sender verification is now available in
2957 $sender_address_data in subsequent conditions in the ACL statement.
2959 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2961 15. Added a new option "connect=<time>" to callout options, to set a different
2964 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2965 was its contents. (It was OK if the option was not defined at all.)
2967 17. A "Completed" log line is now written for messages that are removed from
2968 the spool by the -Mrm option.
2970 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2971 information about exactly what failed.
2973 19. Added -dd to debug only the daemon process.
2975 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2976 handles timeouts, both on the server side and network timeouts. Renamed the
2977 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2979 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2980 It is now set to "smtps".
2982 22. $host_address is now set to the target address during the checking of
2983 ignore_target_hosts.
2985 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2986 being passed; this would have caused $sender_host_name to have been used if
2987 matching the list had actually called for a host name (not very likely,
2988 since this list is usually IP addresses). A host name is now passed as
2991 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2992 code that specifies a non-restarting handler (typically sigaction() in
2993 modern systems) in an attempt to fix a rare and obscure crash bug.
2995 25. Narrowed the window for a race in the daemon that could cause it to ignore
2996 SIGCHLD signals. This is not a major problem, because they are used only to
2997 wake it up if nothing else does.
2999 26. A malformed maildirsize file could cause Exim to calculate negative values
3000 for the mailbox size or file count. Odd effects could occur as a result.
3001 The maildirsize information is now recalculated if the size or filecount
3004 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3005 support for a long time. Removed HAVE_SYS_VFS_H.
3007 28. Installed the latest version of exipick from John Jetmore.
3009 29. In an address list, if the pattern was not a regular expression, an empty
3010 subject address (from a bounce message) matched only if the pattern was an
3011 empty string. Non-empty patterns were not even tested. This was the wrong
3012 because it is perfectly reasonable to use an empty address as part of a
3013 database query. An empty address is now tested by patterns that are
3014 lookups. However, all the other forms of pattern expect the subject to
3015 contain a local part and a domain, and therefore, for them, an empty
3016 address still always fails if the pattern is not itself empty.
3018 30. Exim went into a mad DNS loop when attempting to do a callout where the
3019 host was specified on an smtp transport, and looking it up yielded more
3020 than one IP address.
3022 31. Re-factored the code for checking spool and log partition space into a
3023 function that finds that data and another that does the check. The former
3024 is then used to implement four new variables: $spool_space, $log_space,
3025 $spool_inodes, and $log_inodes.
3027 32. The RFC2047 encoding function was originally intended for short strings
3028 such as real names; it was not keeping to the 75-character limit for
3029 encoded words that the RFC imposes. It now respects the limit, and
3030 generates multiple encoded words if necessary. To be on the safe side, I
3031 have increased the buffer size for the ${rfc2047: expansion operator from
3034 33. It is now permitted to omit both strings after an "if" condition; if the
3035 condition is true, the result is "true". As before, when the second string
3036 is omitted, a false condition yields an empty string. This makes it less
3037 cumbersome to write custom ACL and router conditions.
3039 34. Failure to deliver a bounce message always caused it to be frozen, even if
3040 there was an errors_to setting on the router. The errors_to setting is now
3043 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3044 canonical form (fully expanded) before being placed in
3045 $sender_host_address.
3047 36. The table in the code that translates DNS record types into text (T_A to
3048 "A" for instance) was missing entries for NS and CNAME. It is just possible
3049 that this could have caused confusion if both these types were looked up
3050 for the same domain, because the text type is used as part of Exim's
3051 per-process caching. But the chance of anyone hitting this buglet seems
3054 37. The dnsdb lookup has been extended in a number of ways.
3056 (1) There is a new type, "zns", which walks up the domain tree until it
3057 finds some nameserver records. It should be used with care.
3059 (2) There is a new type, "mxh", which is like "mx" except that it returns
3060 just the host names, not the priorities.
3062 (3) It is now possible to give a list of domains (or IP addresses) to be
3063 looked up. The behaviour when one of the lookups defers can be
3064 controlled by a keyword.
3066 (4) It is now possible to specify the separator character for use when
3067 multiple records are returned.
3069 38. The dnslists ACL condition has been extended: it is now possible to supply
3070 a list of IP addresses and/or domains to be looked up in a particular DNS
3073 39. Added log_selector=+queue_time_overall.
3075 40. When running the queue in the test harness, wait just a tad after forking a
3076 delivery process, to get repeatability of debugging output.
3078 41. Include certificate and key file names in error message when GnuTLS fails
3079 to set them up, because the GnuTLS error message doesn't include the name
3080 of the failing file when there is a problem reading it.
3082 42. Allow both -bf and -bF in the same test run.
3084 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3086 44. The "Exiscan patch" is now merged into the mainline Exim source.
3088 45. Sometimes the final signoff response after QUIT could fail to get
3089 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3090 < 0 before doing a fflush(). This bug looks as though it goes back to the
3091 introduction of TLS in release 3.20, but "sometimes" must have been rare
3092 because the tests only now provoked it.
3094 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3095 (this can affect the format of dates).
3097 47. exim_tidydb, when checking for the continued existence of a message for
3098 which it has found a message-specific retry record, was not finding
3099 messages that were in split spool directories. Consequently, it was
3100 deleting retry records that should have stayed in existence.
3102 48. Steve fixed some bugs in eximstats.
3104 49. The SPA authentication driver was not abandoning authentication and moving
3105 on to the next authenticator when an expansion was forced to fail,
3106 contradicting the general specification for all authenticators. Instead it
3107 was generating a temporary error. It now behaves as specified.
3109 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3110 (the order specifies the preference for clients). The order is now AES256,
3111 AES128, 3DES, ARCFOUR128.
3113 51. Small patch to Sieve code - explicitly set From: when generating an
3116 52. Exim crashed if a remote delivery caused a very long error message to be
3117 recorded - for instance if somebody sent an entire SpamAssassin report back
3118 as a large number of 550 error lines. This bug was coincidentally fixed by
3119 increasing the size of one of Exim's internal buffers (big_buffer) that
3120 happened as part of the Exiscan merge. However, to be on the safe side, I
3121 have made the code more robust (and fixed the comments that describe what
3124 53. Now that there can be additional text after "Completed" in log lines (if
3125 the queue_time_overall log selector is set), a one-byte patch to exigrep
3126 was needed to allow it to recognize "Completed" as not the last thing in
3129 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3130 patch that reportedly fixes this has been added. I am not expert enough to
3131 create a test for it. This is what the patch creator wrote:
3133 "I found a little strange behaviour of ldap code when working with
3134 Windows 2003 AD Domain, where users was placed in more than one
3135 Organization Units. When I tried to give exim partial DN, the exit code
3136 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3137 But simultaneously result of request was absolutely normal ldap result,
3138 so I produce this patch..."
3140 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3141 REFERENCE, so I have modified the code to exclude the patch when that macro
3144 55. Some experimental protocols are using DNS PTR records for new purposes. The
3145 keys for these records are domain names, not reversed IP addresses. The
3146 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3147 leaves it alone. Component reversal etc. now happens only for IP addresses.
3150 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3152 57. Double the size of the debug message buffer (to 2048) so that more of very
3153 long debug lines gets shown.
3155 58. The exicyclog utility now does better if the number of log files to keep
3156 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3158 59. Two changes related to the smtp_active_hostname option:
3160 (1) $smtp_active_hostname is now available as a variable.
3161 (2) The default for smtp_banner uses $smtp_active_hostname instead
3162 of $primary_hostname.
3164 60. The host_aton() function is supposed to be passed a string that is known
3165 to be a valid IP address. However, in the case of IPv6 addresses, it was
3166 not checking this. This is a hostage to fortune. Exim now panics and dies
3167 if the condition is not met. A case was found where this could be provoked
3168 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3169 components; fortuitously, this particular loophole had already been fixed
3170 by change 4.50/55 above.
3172 If there are any other similar loopholes, the new check in host_aton()
3173 itself should stop them being exploited. The report I received stated that
3174 data on the command line could provoke the exploit when Exim was running as
3175 exim, but did not say which command line option was involved. All I could
3176 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3177 running as the user.
3180 61. There was a buffer overflow vulnerability in the SPA authentication code
3181 (which came originally from the Samba project). I have added a test to the
3182 spa_base64_to_bits() function which I hope fixes it.
3185 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3186 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3188 63. The daemon start-up calls getloadavg() while still root for those OS that
3189 need the first call to be done as root, but it missed one case: when
3190 deliver_queue_load_max is set with deliver_drop_privilege. This is
3191 necessary for the benefit of the queue runner, because there is no re-exec
3192 when deliver_drop_privilege is set.
3194 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3195 This has been fixed.
3197 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3198 was in use, was not putting the data itself into the right store pool;
3199 consequently, it could be overwritten for a subsequent message in the same
3200 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3203 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3205 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3206 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3207 the function were treating the return as a boolean value, which happened to
3208 work because 0=false and not-0=true, but is not correct code.
3210 68. The host_aton() function was not handling scoped IPv6 addresses (those
3211 with, for example, "%eth0" on the end) correctly.
3213 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3214 negated items (that is, ~something) in unsigned ints. Some compilers
3215 apparently mutter when there is no cast.
3217 70. If an address verification called from an ACL failed, and did not produce a
3218 user-specific message (i.e. there was only a "system" message), nothing was
3219 put in $acl_verify_message. In this situation, it now puts the system
3222 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3223 session; change 4.31/43 added the unwanted input to the log line - except
3224 that it did not do this in the start of session case. It now does.
3226 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3227 This is wrong and can cause the other end to generate a synchronization
3228 error if it is another Exim or anything else that does the synchronization
3229 check. A QUIT command is no longer sent after a timeout.
3231 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3232 during host lookups.
3234 74. The defer_ok option of callout verification was not working if it was used
3235 when verifying addresses in header lines, that is, for this case:
3237 verify = header_sender/callout=defer_ok
3239 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3240 those file descriptors could be used for SMTP connections. If anything
3241 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3242 could be sent to the SMTP client, causing chaos. The daemon now opens
3243 stdin, stdout, and stderr to /dev/null when it puts itself into the
3246 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3247 log by default. The user can override this with suitable Perl magic.
3249 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3250 the log message when discard triggers, was not working for the DATA ACL or
3251 for the non-SMTP ACL.
3253 78. Error message wording change in sieve.c.
3255 79. If smtp_accept_max_per_host was set, the number of connections could be
3256 restricted to fewer than expected, because the daemon was trying to set up
3257 a new connection before checking whether the processes handling previous
3258 connections had finished. The check for completed processes is now done
3259 earlier. On busy systems, this bug wouldn't be noticed because something
3260 else would have woken the daemon, and it would have reaped the completed
3263 80. If a message was submitted locally by a user whose login name contained one
3264 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3265 It caused a spool format error. I have fixed the spool reading code. A
3266 related problem was that the "from" clause in the Received: line became
3267 illegal because of the space(s). It is now covered by ${quote_local_part.
3269 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3272 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3274 83. Patch from Sieve maintainer to fix unterminated string problem in
3275 "vacation" handling.
3277 84. Some minor changes to the Linux configuration files to help with other
3278 OS variants using glibc.
3280 85. One more patch for Sieve to update vacation handling to latest spec.
3283 ----------------------------------------------------
3284 See the note above about the 4.44 and 4.50 releases.
3285 ----------------------------------------------------
3291 1. Change 4.43/35 introduced a bug that caused file counts to be
3292 incorrectly computed when quota_filecount was set in an appendfile
3295 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3296 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3299 3. Give more explanation in the error message when the command for a transport
3300 filter fails to execute.
3302 4. There are several places where Exim runs a non-Exim command in a
3303 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3304 was being done only for the command run by the queryprogram router. It is
3305 now done for all such subprocesses. The other cases are: ${run, transport
3306 filters, and the commands run by the lmtp and pipe transports.
3308 5. Some older OS have a limit of 256 on the maximum number of file
3309 descriptors. Exim was using setrlimit() to set 1000 as a large value
3310 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3311 systems. I've change it so that if it can't get 1000, it tries for 256.
3313 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3314 was an oversight, and furthermore, ever since the addition of extra
3315 controls (e.g. 4.43/32), the checks on when to allow different forms of
3316 "control" were broken. There should now be diagnostics for all cases when a
3317 control that does not make sense is encountered.
3319 7. $recipients is now available in the predata ACL (oversight).
3321 8. Tidy the search cache before the fork to do a delivery from a message
3322 received from the command line. Otherwise the child will trigger a lookup
3323 failure and thereby defer the delivery if it tries to use (for example) a
3324 cached ldap connection that the parent has called unbind on.
3326 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3327 of $address_data from the recipient verification was clobbered by the
3328 sender verification.
3330 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3331 was its contents. (It was OK if the option was not defined at all.)
3333 11. A "Completed" log line is now written for messages that are removed from
3334 the spool by the -Mrm option.
3336 12. $host_address is now set to the target address during the checking of
3337 ignore_target_hosts.
3339 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3340 being passed; this would have caused $sender_host_name to have been used if
3341 matching the list had actually called for a host name (not very likely,
3342 since this list is usually IP addresses). A host name is now passed as
3345 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3346 code that specifies a non-restarting handler (typically sigaction() in
3347 modern systems) in an attempt to fix a rare and obscure crash bug.
3349 15. Narrowed the window for a race in the daemon that could cause it to ignore
3350 SIGCHLD signals. This is not a major problem, because they are used only to
3351 wake it up if nothing else does.
3353 16. A malformed maildirsize file could cause Exim to calculate negative values
3354 for the mailbox size or file count. Odd effects could occur as a result.
3355 The maildirsize information is now recalculated if the size or filecount
3358 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3359 support for a long time. Removed HAVE_SYS_VFS_H.
3361 18. Updated exipick to current release from John Jetmore.
3363 19. Allow an empty sender to be matched against a lookup in an address list.
3364 Previously the only cases considered were a regular expression, or an
3367 20. Exim went into a mad DNS lookup loop when doing a callout where the
3368 host was specified on the transport, if the DNS lookup yielded more than
3371 21. The RFC2047 encoding function was originally intended for short strings
3372 such as real names; it was not keeping to the 75-character limit for
3373 encoded words that the RFC imposes. It now respects the limit, and
3374 generates multiple encoded words if necessary. To be on the safe side, I
3375 have increased the buffer size for the ${rfc2047: expansion operator from
3378 22. Failure to deliver a bounce message always caused it to be frozen, even if
3379 there was an errors_to setting on the router. The errors_to setting is now
3382 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3383 canonical form (fully expanded) before being placed in
3384 $sender_host_address.
3386 24. Updated eximstats to version 1.33
3388 25. Include certificate and key file names in error message when GnuTLS fails
3389 to set them up, because the GnuTLS error message doesn't include the name
3390 of the failing file when there is a problem reading it.
3392 26. Expand error message when OpenSSL has problems setting up cert/key files.
3395 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3396 (this can affect the format of dates).
3398 28. exim_tidydb, when checking for the continued existence of a message for
3399 which it has found a message-specific retry record, was not finding
3400 messages that were in split spool directories. Consequently, it was
3401 deleting retry records that should have stayed in existence.
3403 29. eximstats updated to version 1.35
3404 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3405 1.35 - bugfix such that pie charts by volume are generated correctly
3407 30. The SPA authentication driver was not abandoning authentication and moving
3408 on to the next authenticator when an expansion was forced to fail,
3409 contradicting the general specification for all authenticators. Instead it
3410 was generating a temporary error. It now behaves as specified.
3412 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3413 (the order specifies the preference for clients). The order is now AES256,
3414 AES128, 3DES, ARCFOUR128.
3416 31. Small patch to Sieve code - explicitly set From: when generating an
3419 32. Exim crashed if a remote delivery caused a very long error message to be
3420 recorded - for instance if somebody sent an entire SpamAssassin report back
3421 as a large number of 550 error lines. This bug was coincidentally fixed by
3422 increasing the size of one of Exim's internal buffers (big_buffer) that
3423 happened as part of the Exiscan merge. However, to be on the safe side, I
3424 have made the code more robust (and fixed the comments that describe what
3427 33. Some experimental protocols are using DNS PTR records for new purposes. The
3428 keys for these records are domain names, not reversed IP addresses. The
3429 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3430 leaves it alone. Component reversal etc. now happens only for IP addresses.
3433 34. The host_aton() function is supposed to be passed a string that is known
3434 to be a valid IP address. However, in the case of IPv6 addresses, it was
3435 not checking this. This is a hostage to fortune. Exim now panics and dies
3436 if the condition is not met. A case was found where this could be provoked
3437 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3438 components; fortuitously, this particular loophole had already been fixed
3439 by change 4.50/55 or 4.44/33 above.
3441 If there are any other similar loopholes, the new check in host_aton()
3442 itself should stop them being exploited. The report I received stated that
3443 data on the command line could provoke the exploit when Exim was running as
3444 exim, but did not say which command line option was involved. All I could
3445 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3446 running as the user.
3449 35. There was a buffer overflow vulnerability in the SPA authentication code
3450 (which came originally from the Samba project). I have added a test to the
3451 spa_base64_to_bits() function which I hope fixes it.
3454 36. The daemon start-up calls getloadavg() while still root for those OS that
3455 need the first call to be done as root, but it missed one case: when
3456 deliver_queue_load_max is set with deliver_drop_privilege. This is
3457 necessary for the benefit of the queue runner, because there is no re-exec
3458 when deliver_drop_privilege is set.
3460 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3461 was in use, was not putting the data itself into the right store pool;
3462 consequently, it could be overwritten for a subsequent message in the same
3463 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3466 38. Sometimes the final signoff response after QUIT could fail to get
3467 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3468 < 0 before doing a fflush(). This bug looks as though it goes back to the
3469 introduction of TLS in release 3.20, but "sometimes" must have been rare
3470 because the tests only now provoked it.
3476 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3477 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3478 Now it returns an integer. A number of calls were still expecting a T/F
3479 return. Fortuitously, in all cases, the tests worked in OK situations,
3480 which is the norm. However, things would have gone wrong on any write
3481 failures on the smtp file descriptor. This function is used when sending
3482 messages over SMTP and also when doing verify callouts.
3484 2. When Exim is called to do synchronous delivery of a locally submitted
3485 message (the -odf or -odi options), it no longer closes stderr before doing
3488 3. Implemented the mua_wrapper option.
3490 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3492 5. Implemented the functions header_remove(), header_testname(),
3493 header_add_at_position(), and receive_remove_recipient(), and exported them
3496 6. If an ACL "warn" statement specified the addition of headers, Exim already
3497 inserted X-ACL-Warn: at the start if there was no header name. However, it
3498 was not making this test for the second and subsequent header lines if
3499 there were newlines in the string. This meant that an invalid header could
3500 be inserted if Exim was badly configured.
3502 7. Allow an ACL "warn" statement to add header lines at the start or after all
3503 the Received: headers, as well as at the end.
3505 8. Added the rcpt_4xx retry error code.
3507 9. Added postmaster_mailfrom=xxx to callout verification option.
3509 10. Added mailfrom=xxxx to the callout verification option, for verify=
3512 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3513 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3515 12. Inserted some casts to stop certain compilers warning when using pointer
3516 differences as field lengths or precisions in printf-type calls (mostly
3517 affecting debugging statements).
3519 13. Added optional readline() support for -be (dynamically loaded).
3521 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3522 same clock tick as a message's arrival, so that its received time was the
3523 same as the "first fail" time on the retry record, and that message
3524 remained on the queue past the ultimate address timeout, every queue runner
3525 would try a delivery (because it was past the ultimate address timeout) but
3526 after another failure, the ultimate address timeout, which should have then
3527 bounced the address, did not kick in. This was a "< instead of <=" error;
3528 in most cases the first failure would have been in the next clock tick
3529 after the received time, and all would be well.
3531 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3532 being recognized when the domain list was tested by the match_domain
3533 condition in an expansion string.
3535 16. Added the ${str2b64: operator.
3537 17. Exim was always calling setrlimit() to set a large limit for the number of
3538 processes, without checking whether the existing limit was already
3539 adequate. (It did check for the limit on file descriptors.) Furthermore,
3540 errors from getrlimit() and setrlimit() were being ignored. Now they are
3541 logged to the main and panic logs, but Exim does carry on, to try to do its
3542 job under whatever limits there are.
3544 18. Imported PCRE 5.0.
3546 19. Trivial typo in log message " temporarily refused connection" (the leading
3549 20. If the log selector return_path_on_delivery was set and an address was
3550 redirected to /dev/null, the delivery process crashed because it assumed
3551 that a return path would always be set for a "successful" delivery. In this
3552 case, the whole delivery is bypassed as an optimization, and therefore no
3555 21. Internal re-arrangement: the function for sending a challenge and reading
3556 a response while authentication was assuming a zero-terminated challenge
3557 string. It's now changed to take a pointer and a length, to allow for
3558 binary data in such strings.
3560 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3562 23. Exim was not respecting finduser_retries when seeking the login of the
3563 uid under which it was called; it was always trying 10 times. (The default
3564 setting of finduser_retries is zero.) Also, it was sleeping after the final
3565 failure, which is pointless.
3567 24. Implemented tls_on_connect_ports.
3569 25. Implemented acl_smtp_predata.
3571 26. If the domain in control=submission is set empty, Exim assumes that the
3572 authenticated id is a complete email address when it generates From: or
3573 Sender: header lines.
3575 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3576 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3577 chown and chgrp in /bin and hostname in /usr/bin.
3579 28. Exim was keeping the "process log" file open after each use, just as it
3580 does for the main log. This opens the possibility of it remaining open for
3581 long periods when the USR1 signal hits a daemon. Occasional processlog
3582 errors were reported, that could have been caused by this. Anyway, it seems
3583 much more sensible not to leave this file open at all, so that is what now
3586 29. The long-running daemon process does not normally write to the log once it
3587 has entered its main loop, and it closes the log before doing so. This is
3588 so that log files can straightforwardly be renamed and moved. However,
3589 there are a couple of unusual error situations where the daemon does write
3590 log entries, and I had neglected to close the log afterwards.
3592 30. The text of an SMTP error response that was received during a remote
3593 delivery was being truncated at 512 bytes. This is too short for some of
3594 the long messages that one sometimes sees. I've increased the limit to
3597 31. It is now possible to make retry rules that apply only when a message has a
3598 specific sender, in particular, an empty sender.
3600 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3601 it possible to be selective about when SMTP synchronization is enforced.
3603 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3605 32. Implemented hosts_connection_nolog.
3607 33. Added an ACL for QUIT.
3609 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3612 35. Added mailbox_size and mailbox_filecount to appendfile.
3614 36. Added control = no_multiline_responses to ACLs.
3616 37. There was a bug in the logic of the code that waits for the clock to tick
3617 in the case where the clock went backwards by a substantial amount such
3618 that the microsecond fraction of "now" was more than the microsecond
3619 fraction of "then" (but the whole seconds number was less).
3621 38. Added support for the libradius Radius client library this is found on
3622 FreeBSD (previously only the radiusclient library was supported).
3628 1. When certain lookups returned multiple values in the form name=value, the
3629 quoting of the values was not always being done properly. Specifically:
3630 (a) If the value started with a double quote, but contained no whitespace,
3632 (b) If the value contained whitespace other than a space character (i.e.
3633 tabs or newlines or carriage returns) it was not quoted.
3634 This fix has been applied to the mysql and pgsql lookups by writing a
3635 separate quoting function and calling it from the lookup code. The fix
3636 should probably also be applied to nisplus, ibase and oracle lookups, but
3637 since I cannot test any of those, I have not disturbed their existing code.
3639 2. A hit in the callout cache for a specific address caused a log line with no
3640 reason for rejecting RCPT. Now it says "Previous (cached) callout
3641 verification failure".
3643 3. There was an off-by-one bug in the queryprogram router. An over-long
3644 return line was truncated at 256 instead of 255 characters, thereby
3645 overflowing its buffer with the terminating zero. As well as fixing this, I
3646 have increased the buffer size to 1024 (and made a note to document this).
3648 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3649 when Exim is waiting for an SMTP response from a remote server, Exim
3650 restarts its select() call on the socket, thereby resetting its timeout.
3651 This is not a problem when such interrupts are rare. Somebody set up a cron
3652 job to run exiwhat every 2 minutes, which is less than the normal select()
3653 timeout (5 or 10 minutes). This meant that the select() timeout never
3654 kicked in because it was always reset. I have fixed this by comparing the
3655 time when an interrupt arrives with the time at the start of the first call
3656 to select(). If more time than the timeout has elapsed, the interrupt is
3657 treated as a timeout.
3659 5. Some internal re-factoring in preparation for the addition of Sieve
3660 extensions (by MH). In particular, the "personal" test is moved to a
3661 separate function, and given an option for scanning Cc: and Bcc: (which is
3662 not set for Exim filters).
3664 6. When Exim created an email address using the login of the caller as the
3665 local part (e.g. when creating a From: or Sender: header line), it was not
3666 quoting the local part when it contained special characters such as @.
3668 7. Installed new OpenBSD configuration files.
3670 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3671 try to make them clearer.
3673 9. Callout options, other than the timeout value, were being ignored when
3674 verifying sender addresses in header lines. For example, when using
3676 verify = header_sender/callout=no_cache
3678 the cache was (incorrectly) being used.
3680 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3681 only the Cygwin environment.
3683 11. When return_path_on_delivery was set as a log selector, if different remote
3684 addresses in the same message used different return paths and parallel
3685 remote delivery occurred, the wrong values would sometimes be logged.
3686 (Whenever a remote delivery process finished, the return path value from
3687 the most recently started remote delivery process was logged.)
3689 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3690 lines when AUTH and/or TLS are in use. This is the "received protocol"
3691 field. Exim used to use "asmtp" for authenticated SMTP, without any
3692 indication (in the protocol name) for TLS use. Now it follows the RFC and
3693 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3694 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3695 names appear in log lines as well as in Received: header lines.
3697 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3698 extensions, and comparison tests, and to fix some bugs.
3700 14. Changes to the "personal" filter test:
3702 (1) The test was buggy in that it was just doing the equivalent of
3703 "contains" tests on header lines. For example, if a user's address was
3704 anne@some.where, the "personal" test would incorrectly be true for
3706 To: susanne@some.where
3708 This test is now done by extracting each address from the header in turn,
3709 and checking the entire address. Other tests that are part of "personal"
3710 are now done using regular expressions (for example, to check local parts
3711 of addresses in From: header lines).
3713 (2) The list of non-personal local parts in From: addresses has been
3714 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3715 taken from the Sieve specification recommendations.
3717 (3) If the message contains any header line starting with "List-" it is
3718 treated as non-personal.
3720 (4) The test for "circular" in the Subject: header line has been removed
3721 because it now seems ill-conceived.
3723 15. Minor typos in src/EDITME comments corrected.
3725 16. Installed latest exipick from John Jetmore.
3727 17. If headers_add on a router specified a text string that was too long for
3728 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3729 of string_sprintf() is now avoided.
3731 18. $message_body_size was not set (it was always zero) when running the DATA
3732 ACL and the local_scan() function.
3734 19. For the "mail" command in an Exim filter, no default was being set for
3735 the once_repeat time, causing a random time value to be used if "once" was
3736 specified. (If the value happened to be <= 0, no repeat happened.) The
3737 default is now 0s, meaning "never repeat". The "vacation" command was OK
3738 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3739 (I found it when inspecting the code).
3741 20. There is now an overall timeout for performing a callout verification. It
3742 defaults to 4 times the callout timeout, which applies to individual SMTP
3743 commands during the callout. The overall timeout applies when there is more
3744 than one host that can be tried. The timeout is checked before trying the
3745 next host. This prevents very long delays if there are a large number of
3746 hosts and all are timing out (e.g. when the network connections are timing
3747 out). The value of the overall timeout can be changed by specifying an
3748 additional sub-option for "callout", called "maxwait". For example:
3750 verify = sender/callout=5s,maxwait=20s
3752 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3753 to the end before writing, but this should make it even safer).
3755 22. Exim was forgetting that it had advertised PIPELINING for the second and
3756 subsequent messages on an SMTP connection. It was also not resetting its
3757 memory on STARTTLS and an internal HELO.
3759 23. When Exim logs an SMTP synchronization error within a session, it now
3760 records whether PIPELINING has been advertised or not.
3762 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3763 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3764 rather than long int.
3766 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3768 26. Added the never_mail option to autoreply.
3774 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3775 crash if the getsockname() call failed; this can happen if a connection is
3776 closed very soon after it is established. The problem was simply in the
3777 order in which certain operations were done, causing Exim to try to write
3778 to the SMTP stream before it had set up the file descriptor. The bug has
3779 been fixed by making things happen in the correct order.
3785 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3786 before the connection was closed, thus losing the rejection response.
3788 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3789 some early Solaris releases, but causes trouble in current releases where
3790 socklen_t is defined.
3792 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3795 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3798 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3799 that releasing the top of it at the end releases what was used for sub-
3800 expansions (unless the block got too big). However, discard this block if
3801 the first thing is a variable or header, so that we can use its block when
3802 it is dynamic (useful for very large $message_headers, for example).
3804 6. Lookups now cache *every* query, not just the most recent. A new, separate
3805 store pool is used for this. It can be recovered when all lookup caches are
3806 flushed. Lookups now release memory at the end of their result strings.
3807 This has involved some general refactoring of the lookup sources.
3809 7. Some code has been added to the store_xxx() functions to reduce the amount
3810 of flapping under certain conditions.
3812 8. log_incoming_interface used to affect only the <= reception log lines. Now
3813 it causes the local interface and port to be added to several more SMTP log
3814 lines, for example "SMTP connection from", and rejection lines.
3816 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3818 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3820 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3821 could be overwritten at the end of the current message (or the start of a
3822 new message if it was set in a HELO ACL). The value is now preserved for
3823 the duration of the SMTP connection.
3825 12. If a transport had a headers_rewrite setting, and a matching header line
3826 contained an unqualified address, that address was qualified, even if it
3827 did not match any rewriting rules. The underlying bug was that the values
3828 of the flags that permit the existence of unqualified sender and recipient
3829 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3830 non-local messages, and by -bnq for local messages) were not being
3831 preserved with the message after it was received.
3833 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3834 "next input=" as part of the text comprising the host identity instead of
3835 the correct text. The code was using the same buffer for two different
3836 strings. However, depending on which order the printing function evaluated
3837 its arguments, the bug did not always show up. Under Linux, for example, my
3838 test suite worked just fine.
3840 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3841 doesn't work with some older versions of Perl. It has been changed to "my",
3842 which in any case is probably the better facility to use.
3844 15. A really picky compiler found some instances of statements for creating
3845 error messages that either had too many or two few arguments for the format
3848 16. The size of the buffer for calls to the DNS resolver has been increased
3849 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3850 for addresses that have a lot of PTR records. This alleviates a problem; it
3851 does not fully solve it.
3853 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3854 buffer now truncates the list and logs the incident, which is the same
3855 action as happens when Exim is looking up a host name and its aliases.
3856 Previously in this situation something unpredictable would happen;
3857 sometimes it was "internal error: store_reset failed".
3859 18. If a server dropped the connection unexpectedly when an Exim client was
3860 using GnuTLS and trying to read a response, the client delivery process
3861 crashed while trying to generate an error log message.
3863 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3864 string, for example:
3866 warn message = H1: something\nH2: something
3868 the text was added as a single header line from Exim's point of view
3869 though it ended up OK in the delivered message. However, searching for the
3870 second and subsequent header lines using $h_h2: did not work. This has been
3871 fixed. Similarly, if a system filter added multiple headers in this way,
3872 the routers could not see them.
3874 20. Expanded the error message when iplsearch is called with an invalid key to
3875 suggest using net-iplsearch in a host list.
3877 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3878 ACLs are no longer actually imposed (and a message to that effect is
3881 22. If a "gecos" field in a passwd entry contained escaped characters, in
3882 particular, if it contained a \" sequence, Exim got it wrong when building
3883 a From: or a Sender: header from that name. A second bug also caused
3884 incorrect handling when an unquoted " was present following a character
3885 that needed quoting.
3887 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3888 was not being matched caselessly.
3890 24. Arranged for all hyphens in the exim.8 source to be escaped with
3893 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3894 properly. Recipient callout cache records were still being keyed to include
3895 the sender, even when use_sender was set false. This led to far more
3896 callouts that were necessary. The sender is no longer included in the key
3897 when use_sender is false.
3899 26. Added "control = submission" modifier to ACLs.
3901 27. Added the ${base62d: operator to decode base 62 numbers.
3903 28. dnsdb lookups can now access SRV records.
3905 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3906 the configuration file.
3908 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3909 (-v) mode. This makes the output for a verbose queue run more intelligible.
3911 31. Added a use_postmaster feature to recipient callouts.
3913 32. Added the $body_zerocount variable, containing the number of binary zero
3914 bytes in the message body.
3916 33. The time of last modification of the "new" subdirectory is now used as the
3917 "mailbox time last read" when there is a quota error for a maildir
3920 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3922 35. Added +ignore_unknown as a special item in host lists.
3924 36. Code for decoding IPv6 addresses in host lists is now included, even if
3925 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3926 address was recognized as an IP address, but was then not correctly decoded
3927 into binary, causing unexpected and incorrect effects when compared with
3934 1. Very minor rewording of debugging text in manualroute to say "list of
3935 hosts" instead of "hostlist".
3937 2. If verify=header_syntax was set, and a header line with an unqualified
3938 address (no domain) and a large number of spaces between the end of the
3939 name and the colon was received, the reception process suffered a buffer
3940 overflow, and (when I tested it) crashed. This was caused by some obsolete
3941 code that should have been removed. The fix is to remove it!
3943 3. When running in the test harness, delay a bit after writing a bounce
3944 message to get a bit more predictability in the log output.
3946 4. Added a call to search_tidyup() just before forking a reception process. In
3947 theory, someone could use a lookup in the expansion of smtp_accept_max_
3948 per_host which, without the tidyup, could leave open a database connection.
3950 5. Added the variables $recipient_data and $sender_data which get set from a
3951 lookup success in an ACL "recipients" or "senders" condition, or a router
3952 "senders" option, similar to $domain_data and $local_part_data.
3954 6. Moved the writing of debug_print from before to after the "senders" test
3957 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3958 problems for message scanning, either using a data ACL, or using
3959 local_scan() because the Received: header was not generated till after they
3960 were called (in order to set the time as the time of reception completion).
3961 I have revised the way this works. The header is now generated after the
3962 body is received, but before the ACL or local_scan() are called. After they
3963 are run, the timestamp in the header is updated.
3969 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3970 before starting a queue runner without re-exec. This happened only when
3971 deliver_drop_privilege was set or when the Exim user was set to root. The
3972 effect of the bug was that timeouts during subsequent deliveries caused
3973 crashes instead of being properly handled. The handler is now left at its
3974 default (and expected) setting.
3976 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3977 message, again when deliver_drop_privilege is set or Exim is run as root.
3978 The bug described in (1) was not present in this case, but the tidying up
3979 of the other signals was missing. I have made the two cases consistent.
3981 3. The ignore_target_hosts setting on a manualroute router was being ignored
3982 for hosts that were looked up using the /MX notation.
3984 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3987 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3988 operated on the sender address. After changing the $sender_address to <>
3989 for the sender address verify, Exim was re-instated it as the original
3990 (before rewriting) address, but remembering that it had rewritten it, so it
3991 wasn't rewriting it again. This bug also had the effect of breaking the
3992 sender address verification caching when the sender address was rewritten.
3994 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3995 This has been changed so that if the ip literal address matches
3996 ignore_target_hosts, the router declines.
3998 7. Added expansion conditions match_domain, match_address, and match_local_
3999 part (NOT match_host).
4001 8. The placeholder for the Received: header didn't have a length field set.
4003 9. Added code to Exim itself and to exim_lock to test for a specific race
4004 condition that could lead to file corruption when using MBX delivery. The
4005 issue is with the lockfile that is created in /tmp. If this file is removed
4006 after a process has opened it but before that process has acquired a lock,
4007 there is the potential for a second process to recreate the file and also
4008 acquire a lock. This could lead to two Exim processes writing to the file
4009 at the same time. The added code performs the same test as UW imapd; it
4010 checks after acquiring the lock that its file descriptor still refers to
4011 the same named file.
4013 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4014 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4017 11. Added the smtp_active_hostname option. If used, this will typically be made
4018 to depend on the incoming interface address. Because $interface_address is
4019 not set up until the daemon has forked a reception process, error responses
4020 that can happen earlier (such as "too many connections") no longer contain
4023 12. If an expansion in a condition on a "warn" statement fails because a lookup
4024 defers, the "warn" statement is abandoned, and the next ACL statement is
4025 processed. Previously this caused the whole ACL to be aborted.
4027 13. Added the iplsearch lookup type.
4029 14. Added ident_timeout as a log selector.
4031 15. Added tls_certificate_verified as a log selector.
4033 16. Added a global option tls_require_ciphers (compare the smtp transport
4034 option of the same name). This controls incoming TLS connections.
4036 17. I finally figured out how to make tls_require_ciphers do a similar thing
4037 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4038 before starting the TLS session.
4040 18. Tabs are now shown as \t in -bP output.
4042 19. If the log selector return_path_on_delivery was set, Exim crashed when
4043 bouncing a message because it had too many Received: header lines.
4045 20. If two routers both had headers_remove settings, and the first one included
4046 a superfluous trailing colon, the final name in the first list and the
4047 first name in the second list were incorrectly joined into one item (with a
4048 colon in the middle).
4054 1. Added -C and -D options to the exinext utility, mainly to make it easier
4055 to include in the automated testing, but these could be helpful when
4056 multiple configurations are in use.
4058 2. The exinext utility was not formatting the output nicely when there was
4059 an alternate port involved in the retry record key, nor when there was a
4060 message id as well (for retries that were specific to a specific message
4061 and a specific host). It was also confused by IPv6 addresses, because of
4062 the additional colons they contain. I have fixed the IPv4 problem, and
4063 patched it up to do a reasonable job for IPv6.
4065 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4066 delivery, the log line now contains "pipelined" if PIPELINING was used.
4068 4. An SMTP transport process used to panic and die if the bind() call to set
4069 an explicit outgoing interface failed. This has been changed; it is now
4070 treated in the same way as a connect() failure.
4072 5. A reference to $sender_host_name in the part of a conditional expansion
4073 that was being skipped was still causing a DNS lookup. This no longer
4076 6. The def: expansion condition was not recognizing references to header lines
4077 that used bh_ and bheader_.
4079 7. Added the _cache feature to named lists.
4081 8. The code for checking quota_filecount in the appendfile transport was
4082 allowing one more file than it should have been.
4084 9. For compatibility with Sendmail, the command line option
4092 and sets the incoming protocol and host name (for trusted callers). The
4093 host name and its colon can be omitted when only the protocol is to be set.
4094 Note the Exim already has two private options, -pd and -ps, that refer to
4095 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4096 "s", but I don't think that's a major issue.
4098 10. A number of refactoring changes to the code, none of which should affect
4101 (a) The number of logging options was getting close to filling up the
4102 32-bit word that was used as a bit map. I have split them into two classes:
4103 those that are passed in the argument to log_write(), and those that are
4104 only ever tested independently outside of that function. These are now in
4105 separate 32-bit words, so there is plenty of room for expansion again.
4106 There is no change in the user interface or the logging behaviour.
4108 (b) When building, for example, log lines, the code previously used a
4109 macro that called string_cat() twice, in order to add two strings. This is
4110 not really sufficiently general. Furthermore, there was one instance where
4111 it was actually wrong because one of the argument was used twice, and in
4112 one call a function was used. (As it happened, calling the function twice
4113 did not affect the overall behaviour.) The macro has been replaced by a
4114 function that can join an arbitrary number of extra strings onto a growing
4117 (c) The code for expansion conditions now uses a table and a binary chop
4118 instead of a serial search (which was left over from when there were very
4119 few conditions). Also, it now recognizes conditions like "pam" even when
4120 the relevant support is not compiled in: a suitably worded error message is
4121 given if an attempt is made to use such a condition.
4123 11. Added ${time_interval:xxxxx}.
4125 12. A bug was causing one of the ddress fields not to be passed back correctly
4126 from remote delivery subprocesses. The field in question was not being
4127 subsequently used, so this caused to problems in practice.
4129 13. Added new log selectors queue_time and deliver_time.
4131 14. Might have fixed a bug in maildirsizefile handling that threw up
4132 "unexpected character" debug warnings, and recalculated the data
4133 unnecessarily. In any case, I expanded the warning message to give more
4136 15. Added the message "Restricted characters in address" to the statements in
4137 the default ACL that block characters like @ and % in local parts.
4139 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4140 Three changes have been made:
4142 (a) There was a serious bug; a negative response to MAIL caused the whole
4143 recipient domain to be cached as invalid, thereby blocking all messages
4144 to all local parts at the same domain, from all senders. This bug has
4145 been fixed. The domain is no longer cached after a negative response to
4146 MAIL if the sender used is not empty.
4148 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4151 (c) A new callout option, "use_sender" has been added for people who want
4152 the modified behaviour.
4158 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4161 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4162 indeed breaks things for older releases.
4164 3. Added additional logging to the case where there is a problem reading data
4165 from a filter that is running in a subprocess using a pipe, in order to
4166 try to track down a specific problem.
4168 4. Testing facility fudge: when running in the test harness and attempting
4169 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4170 getting "No route to host". Convert this to a timeout.
4172 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4175 6. Some OS don't have socklen_t but use size_t instead. This affects the
4176 fifth argument of getsockopt() amongst other things. This is now
4177 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4178 can be set for individual OS. I have set it for SunOS5, OSF1, and
4179 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4180 some earlier ones do not.
4182 7. Change 4.30/15 was not doing the test caselessly.
4184 8. The standard form for an IPv6 address literal was being rejected by address
4185 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4186 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4187 this, as well as the form without the "IPv6" on the front (but only when
4188 address literals are enabled, of course).
4190 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4192 10. Exim crashed if a message with an empty sender address specified by -f
4193 encountered a router with an errors_to setting. This could be provoked only
4194 by a command such as
4198 where an empty string was supplied; "<>" did not hit this bug.
4200 11. Installed PCRE release 4.5.
4202 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4203 remained set. It is now erased.
4205 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4206 times from message ids (which are base 36 rather than the normal 62).
4208 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4209 were being counted as actual protocol errors, and logged if the log
4210 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4211 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4212 and DATA following a set of rejected RCPTs do not count as protocol errors.
4213 In other words, Exim assumes they were pipelined, though this may not
4214 actually be the case. Of course, in all cases the client gets an
4215 appropriate error code.
4217 15. If a lookup fails in an ACL condition, a message about the failure may
4218 be available; it is used if testing the ACL cannot continue, because most
4219 such messages specify what the cause of the deferral is. However, some
4220 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4221 that caused an old message to be retained and used if a later statement
4222 caused a defer, replacing the real cause of the deferral.
4224 16. If an IP address had so many PTR records that the DNS lookup buffer
4225 was not large enough to hold them, Exim could crash while trying to process
4226 the truncated data. It now detects and logs this case.
4228 17. Further to 4.21/58, another change has been made: if (and only if) the
4229 first line of a message (the first header line) ends with CRLF, a bare LF
4230 in a subsequent header line has a space inserted after it, so as not to
4231 terminate the header.
4233 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4234 unnecessarily, used atoi() instead of strtol(), and didn't check the
4235 termination when getting file sizes from file names by regex.
4237 19. Completely re-implemented the support for maildirsize files, in the light
4238 of a number of problems with the previous contributed implementation
4239 (4.30/29). In particular:
4241 . If the quota is zero, the maildirsize file is maintained, but no quota is
4244 . If the maildir directory does not exist, it is created before any attempt
4245 to write a maildirsize file.
4247 . The quota value in the file is just a cache; if the quota is changed in
4248 the transport, the new value overrides.
4250 . A regular expression is available for excluding directories from the
4253 20. The autoreply transport checks the characters in options that define the
4254 message's headers; it allows continued headers, but it was checking with
4255 isspace() after an embedded newline instead of explicitly looking for a
4258 21. If all the "regular" hosts to which an address was routed had passed their
4259 expiry times, and had not reached their retry times, the address was
4260 bounced, even if fallback hosts were defined. Now Exim should go on to try
4263 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4264 equivalent code in the SMTP transport. Some hosts send humungous responses
4265 to HELO/EHLO, more than 1024 it seems.
4267 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4268 gives compiler warnings in some environments. I've now done it "properly",
4271 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4272 (because of problems with the built-in one) was declared to return uschar *
4273 instead of char *, causing compiler failure.
4275 25. Fixed a file descriptor leak when processing alias/forward files.
4277 26. Fixed a minor format string issue in dbfn.c.
4279 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4281 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4282 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4285 29. When a sender address is verified, it is cached, to save repeating the test
4286 when there is more than one recipient in a message. However, when the
4287 verification involves a callout, it is possible for different callout
4288 options to be set for different recipients. It is too complicated to keep
4289 track of this in the cache, so now Exim always runs a verification when a
4290 callout is required, relying on the callout cache for the optimization.
4291 The overhead is duplication of the address routing, but this should not be
4294 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4295 to be verified with callout=postmaster, and the main callout worked but the
4296 postmaster check failed, the verification correctly failed. However, if a
4297 subsequent RCPT command asked for sender verification *without* the
4298 postmaster check, incorrect caching caused this verification also to fail,
4301 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4302 it was not caching the DNS options (qualify_single, search_parents) that
4303 were used when the lookup failed. A subsequent lookup with different
4304 options therefore always gave the same answer, though there were cases
4305 where it should not have. (Example: a "domains = !$mx_any" option on a
4306 dnslookup router: the "domains" option is always processed without any
4307 widening, but the router might have qualify_single set.) Now Exim uses the
4308 cached value only when the same options are set.
4310 32. Added John Jetmore's "exipick" utility to the distribution.
4312 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4313 than a timeout (e.g. a certificate is required, and is not provided), an
4314 Exim server now closes the connection immediately. Previously it waited for
4315 the client to close - but if the client is SSL, it seems that they each
4316 wait for each other, leading to a delay before one of them times out.
4318 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4319 maintained 0.8.x compatibility because I don't think many are using it, and
4320 it is clearly obsolete.
4322 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4325 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4326 client certificate was expired. A simple patch fixes this, though I don't
4327 understand the full logic of why the verify callback is called multiple
4330 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4331 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4332 which causes problems with some clients (such as the Certicom SSL Plus
4333 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4334 disables the coutermeasure allowing Eudora to connect."
4336 38. Exim was not checking that a write() to a log file succeeded. This could
4337 lead to Bad Things if a log got too big, in particular if it hit a file
4338 size limit. Exim now panics and dies if it cannot write to a log file, just
4339 as it does if it cannot open a log file.
4341 39. Modified OS/Makefile-Linux so that it now contains
4343 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4345 The two -D definitions ensure that Exim is compiled with large file
4346 support, which makes it possible to handle log files that are bigger than
4349 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4350 instance) a domain was checked against a named list that involved a lookup,
4351 causing $domain_data to be set, then another domain was checked against the
4352 same list, then the first domain was re-checked, the value of $domain_data
4353 after the final check could be wrong. In particular, if the second check
4354 failed, it could be set empty. This bug probably also applied to
4357 41. The strip_trailing_dot option was not being applied to the address given
4358 with the -f command-line option.
4360 42. The code for reading a message's header from the spool was incrementing
4361 $received_count, but never initializing it. This meant that the value was
4362 incorrect (doubled) while delivering a message in the same process in which
4363 it was received. In the most common configuration of Exim, this never
4364 happens - a fresh exec is done - but it can happen when
4365 deliver_drop_privilege is set.
4367 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4368 it now includes up to 150 characters of the unexpected data in the log
4371 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4372 and building data strings. The size of both of these buffers was 10 000
4373 bytes - far larger than anybody would *ever* want, thought I. Needless to
4374 say, somebody hit the limit. I have increased the maximum line length to
4375 20 000 and the maximum data length of concatenated lines to 100 000. I have
4376 also fixed two bugs, because there was no checking on these buffers. Tsk,
4377 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4378 buffer is too small.
4380 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4381 lsearch lookups. Now it does.
4383 46. When parsing a route_list item in a manualroute router, a fixed-length
4384 buffer was used for the list of hosts. I made this 1024 bytes long,
4385 thinking that nobody would ever have a list of hosts that long. Wrong.
4386 Somebody had a whole pile of complicated expansion conditions, and the
4387 string was silently truncated, leading to an expansion error. It turns out
4388 that it is easier to change to an unlimited length (owing to other changes
4389 that have happened since this code was originally written) than to build
4390 structure for giving a limitation error. The length of the item that
4391 expands into the list of hosts is now unlimited.
4393 47. The lsearch lookup could not handle data where the length of text line was
4394 more than 4095 characters. Such lines were truncated, leading to shortened
4395 data being returned. It should now handle lines of any length.
4397 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4398 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4401 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4402 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4403 no longer happens in comment lines. A list of replacements is now placed
4404 at the head of all of the source files, except those whose only change is
4405 to replace PERL_COMMAND in the very first #! line.
4407 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4408 messages on the queue, with a bottom-up merge sort, using code contributed
4409 by Michael Haardt. This should make operations like -bp somewhat faster on
4410 large queues. It won't affect queue runners, except when queue_run_in_order
4413 51. Installed eximstats 1.31 in the distribution.
4415 52. Added support for SRV lookups to the dnslookup router.
4417 53. If an ACL referred to $message_body or $message_body_end, the value was not
4418 reset for any messages that followed in the same SMTP session.
4420 54. The store-handling optimization for building very long strings was not
4421 differentiating between the different store pools. I don't think this
4422 actually made any difference in practice, but I've tidied it.
4424 55. While running the routers to verify a sender address, $sender_address
4425 was still set to the sender address. This is wrong, because when routing to
4426 send a bounce to the sender, it would be empty. Therefore, I have changed
4427 it so that, while verifying a sender address, $sender_address is set to <>.
4428 (There is no change to what happens when verifying a recipient address.)
4430 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4431 target A or AAAA records (if not already returned) without resetting the
4432 qualify_single or search_parents options of the DNS resolver. These are
4433 inappropriate in this case because the targets of MX and SRV records must
4434 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4435 target that, when qualified, matched something in the local domain. These
4436 two options are now turned off when doing these lookups.
4438 57. It seems that at least some releases of Reiserfs (which does not have the
4439 concept of a fixed number of inodes) returns zero and not -1 for the
4440 number of available inodes. This interacted badly with check_spool_inodes,
4441 which assumed that -1 was the "no such thing" setting. What I have done is
4442 to check that the total number of inodes is greater than zero before doing
4443 the test of how many are available.
4445 58. When a "warn" ACL statement has a log_message modifier, the message is
4446 remembered, and not repeated. This is to avoid a lot of repetition when a
4447 message has many recipients that cause the same warning to be written.
4448 Howewer, Exim was preserving the list of already written lines for an
4449 entire SMTP session, which doesn't seem right. The memory is now reset if a
4450 new message is started.
4452 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4453 debugging output unless log_rewrite was also set.
4455 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4456 of (int)(handle) when we know that handle contains (void *)(-1).
4458 61. The Exim daemon panic-logs an error return when it closes the incoming
4459 connection. However "connection reset by peer" seems to be common, and
4460 isn't really an error worthy of noting specially, so that particular error
4463 62. When Exim is trying to find all the local interfaces, it used to panic and
4464 die if the ioctl to get the interface flags failed. However, it seems that
4465 on at least one OS (Solaris 9) it is possible to have an interface that is
4466 included in the list of interfaces, but for which you get a failure error
4467 for this call. This happens when the interface is not "plumbed" into a
4468 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4469 failure of the "get flags" call assumes that the interface is down.
4471 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4472 makes life easier for people who are doing arithmetic on fields extracted
4473 from dates, where you often get leading zeros that should not be
4474 interpreted as octal.
4476 64. Added qualify_domain to the redirect router, to override the global
4479 65. If a pathologically long header line contained very many addresses (the
4480 report of this problem mentioned 10 000) and each of them was rewritten,
4481 Exim could use up a very large amount of memory. (It kept on making new
4482 copies of the header line as it rewrote, and never released the old ones.)
4483 At the expense of a bit more processing, the header rewriting function has
4484 been changed so that it no longer eats memory in this way.
4486 66. The generation of the Received: header has been moved from the time that a
4487 message starts to be received, to the time that it finishes. The timestamp
4488 in the Received: header should now be very close to that of the <= log
4489 line. There are two side-effects of this change:
4491 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4492 logged header lines no longer include the local Received: line, because
4493 it has not yet been created. The same applies to a copy of the message
4494 that is returned to a non-SMTP sender when a message is rejected.
4496 (b) When a filter file is tested using -bf, no additional Received: header
4497 is added to the test message. After some thought, I decided that this
4500 This change does not affect the value of $received_for. It is still set
4501 after address rewriting, but before local_scan() is called.
4503 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4505 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4506 gave an unhelpful panic error message, and a defer error. I have managed to
4507 change this behaviour so that it now rejects any supplied certificate,
4508 which seems right, as the list of acceptable certificates is empty.
4510 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4511 gave an unhelpful defer error. I have not managed to make this reject any
4512 supplied certificates, but the error message it gives is "no certificate
4513 supplied", which is not helpful.
4515 70. exigrep's output now also includes lines that are not associated with any
4516 message, but which match the given pattern. Implemented by a patch from
4517 Martin Sluka, which also tidied up the Perl a bit.
4519 71. Recipient callout verification, like sender verification, was using <> in
4520 the MAIL FROM command. This isn't really the right thing, since the actual
4521 sender may affect whether the remote host accepts the recipient or not. I
4522 have changed it to use the actual sender in the callout; this means that
4523 the cache record is now keyed on a recipient/sender pair, not just the
4524 recipient address. There doesn't seem to be a real danger of callout loops,
4525 since a callout by the remote host to check the sender would use <>.
4526 [SEE ABOVE: changed after hitting problems.]
4528 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4529 temporary errors. However, in the case of such a code being given after
4530 the end of a data transmission (i.e. after ".") Exim was failing to write
4531 a retry record for the message. (Yes, there was some broken host that was
4532 actually sending 8xx at this point.)
4534 73. An unknown lookup type in a host list could cause Exim to panic-die when
4535 the list was checked. (An example that provoked this was putting <; in the
4536 middle of a list instead of at the start.) If this happened during a DATA
4537 ACL check, a -D file could be left lying around. This kind of configuration
4538 error no longer causes Exim to die; instead it causes a defer errror. The
4539 incident is still logged to the main and panic logs.
4541 74. Buglet left over from Exim 3 conversion. The message "too many messages
4542 in one connection" was written to the rejectlog but not the mainlog, except
4543 when address rewriting (yes!) was being logged.
4545 75. Added write_rejectlog option.
4547 76. When a system filter was run not as root (that is, when system_filter_user
4548 was set), the values of the $n variables were not being returned to the
4549 main process; thus, they were not subsequently available in the $sn
4552 77. Added +return_path_on_delivery log selector.
4554 78. A connection timeout was being treated differently from recipients deferred
4555 when testing hosts_max_try with a message that was older than the host's
4556 retry timeout. (The host should not be counted, thus allowing all hosts to
4557 be tried at least once before bouncing.) This may have been the cause of an
4558 occasionally reported bug whereby a message would remain on the queue
4559 longer than the retry timeout, but would be bounced if a delivery was
4560 forced. I say "may" because I never totally pinned down the problem;
4561 setting up timeout/retry tests is difficult. See also the next item.
4563 79. The ultimate address timeout was not being applied to errors that involved
4564 a combination of host plus message (for example, a timeout on a MAIL
4565 command). When an address resolved to a number of possible hosts, and they
4566 were not all tried for each delivery (e.g. because of hosts_max_try), a
4567 message could remain on the queue longer than the retry timeout.
4569 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4572 81. Fixed an obscure SMTP outgoing bug which required at least the following
4573 conditions: (a) there was another message waiting for the same server;
4574 (b) the server returned 5xx to all RCPT commands in the first message so
4575 that the message was not completed; (c) the server dropped the connection
4576 or gave a negative response to the RSET that Exim sends to abort the
4577 transaction. The observed case was a dropped connection after DATA that had
4578 been sent in pipelining mode. That is, the server had advertised PIPELINING
4579 but was not implementing it correctly. The effect of the bug was incorrect
4580 behaviour, such as trying another host, and this could lead to a crash.
4586 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4587 and daemon.c were passed as pointers to ints; they should have been
4588 pointers to socklen_t variables (which are typically unsigned ints).
4590 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4593 3. Fixed a really odd bug that affected only the testing scheme; patching a
4594 certain fixed string in the binary changed the value of another string that
4595 happened to be identical to the end of the original first string.
4597 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4598 name", it returns that address as the IP address. On some operating
4599 systems (e.g. Solaris), it also passes back the IP address string as the
4600 "host name". However, on others (e.g. Linux), it passes back an empty
4601 string. Exim wasn't checking for this, and was changing the host name to an
4602 empty string, assuming it had been canonicized.
4604 5. Although rare, it is permitted to have more than one PTR record for a given
4605 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4606 all the names associated with an address, because they do in Solaris.
4607 However, it seems that they do not in Linux for data that comes from the
4608 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4609 I found this out when I moved to a new Linux workstation and tried to run
4610 the Exim test suite.
4612 To get round this problem I have changed the code so that it now does its
4613 own call to the DNS to look up PTR records when searching for a host name.
4614 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4615 addresses that are only in /etc/hosts are still found.
4617 This behaviour is, however, controlled by an option called host_lookup_
4618 order, which defaults to "bydns:byaddr". If people want to use the other
4619 order, or indeed, just use one or the other means of lookup, they can
4620 specify it in this variable.
4622 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4623 some operating systems, this comes back from gethostbyaddr() as an empty
4624 string, and this is what Exim used to test for. However, it seems that in
4625 other systems, "." is yielded. Exim now tests for this case too.
4627 7. The values of check_spool_space and check_log_space are now held internally
4628 as a number of kilobytes instead of an absolute number of bytes. If a
4629 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4630 kilobyte. This means that much larger values can be stored.
4632 8. Exim monitor: an attempt to get the action menu when not actually pointing
4633 at a message produces an empty menu entitled "No message selected". This
4634 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4635 no entries in it ("Shell widget menu has zero width and/or height"). So I
4636 have added a single, blank menu entry in this case.
4638 9. Added ${quote_local_part.
4640 10. MIME decoding is now applied to the contents of Subject: header lines when
4643 11. Now that a reference to $sender_host_address automatically causes a reverse
4644 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4645 host lookup before query-style lookups in lists that might use this
4646 variable. This has therefore been abolished, and the "net-" prefix is no
4647 longer necessary for query-style lookups.
4649 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4650 have been a typo for LFLAGS, so it has been changed.
4652 13. The install script calls Exim with "-C /dev/null" in order to find the
4653 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4654 to be output. Howeve, since Exim outputs its version number before the
4655 error, it didn't break the script. It just looked ugly. I fixed this by
4656 always allowing "-C /dev/null" if the caller is root.
4658 14. Ignore overlarge ACL variable number when reading spool file - insurance
4659 against a later release with more variables having written the file.
4661 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4662 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4663 this, as well as the form without the "IPv6" on the front.
4665 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4666 OS/Makefile-Darwin file.
4668 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4669 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4671 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4672 variable. However, some OS use ints for inodes. I've added cast to long int
4673 to get rid of the compiler warning.
4675 19. I had forgotten to lock out "/../" in configuration file names when
4676 ALT_CONFIG_PREFIX was set.
4678 20. Routers used for verification do not need to specify transports. However,
4679 if such a router generated a host list, and callout was configured, Exim
4680 crashed, because it could not find a port number from the (non-existent)
4681 transport. It now assumes port 25 in this circumstance.
4683 21. Added the -t option to exigrep.
4685 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4686 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4687 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4688 them is set, LOOKUP_LSEARCH is forced.
4690 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4692 24. Added sender and host information to the "rejected by local_scan()" log
4693 line; previously there was no indication of these.
4695 25. Added .include_if_exists.
4697 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4698 Linux. It turns out that not all file systems support this. Apparently some
4699 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4700 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4701 not supported on the file descriptor, is now ignored when Exim is trying to
4702 sync a directory. This applies only to Linux.
4704 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4706 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4707 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4710 29. Added support for maildirsize files from supplied patch (modified a bit).
4712 30. The use of :fail: followed by an empty string could lead Exim to respond to
4713 sender verification failures with (e.g.):
4715 550 Verification failed for <xxx>
4716 550 Sender verify failed
4718 where the first response line was missing the '-' that indicates it is not
4719 the final line of the response.
4721 31. The loop for finding the name of the user that called Exim had a hardwired
4722 limit of 10; it now uses the value of finduser_retries, which is used for
4723 all other user lookups.
4725 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4728 33. Exim was neglecting to zero errno before one call of strtol() when
4729 expanding a string and expecting an integer value. On some systems this
4730 resulted in spurious "integer overflow" errors. Also, it was casting the
4731 result into an int without checking.
4733 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4734 did not work. The code looks as if it has *never* worked, though it appears
4735 to have been documented since at least releast 1.62. I have made it work.
4737 35. The "timeout_DNS" error in retry rules, also documented since at least
4738 1.62, also never worked. As it isn't clear exactly what this means, and
4739 clearly it isn't a major issue, I have abolished the feature by treating it
4740 as "timeout", and writing a warning to the main and panic logs.
4742 36. The display of retry rules for -brt wasn't always showing the error code
4745 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4746 timeout_connect_A, timeout_connect_MX.
4748 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4749 to the empty sender.
4751 39. The daemon was not analysing the content of -oX till after it had closed
4752 stderr and disconnected from the controlling terminal. This meant that any
4753 syntax errors were only noted on the panic log, and the return code from
4754 the command was 0. By re-arranging the code a little, I've made the
4755 decoding happen first, so such errors now appear on stderr, and the return
4756 code is 1. However, the actual setting up of the sockets still happens in
4757 the disconnected process, so errors there are still only recorded on the
4760 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4761 connections (as happens on some IP stacks) was logged at start up time as
4762 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4763 it from "IPv6 and IPv4", which means that two separate sockets are being
4766 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4767 says whether AF_INET or AF_INET6 was passed as an argument.
4769 42. Exiwhat output was messed up when time zones were included in log
4772 43. Exiwhat now gives more information about the daemon's listening ports,
4773 and whether -tls-on-connect was used.
4775 44. The "port" option of the smtp transport is now expanded.
4777 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4778 silently ignored. Now an error message is written to the main and panic
4781 46. There's a new ACL modifier called "logwrite" which writes to a log file
4782 as soon as it is encountered.
4784 47. Added $local_user_uid and $local_user_gid at routing time.
4786 48. Exim crashed when trying to verify a sender address that was being
4789 49. Exim was recognizing only a space character after ".include". It now also
4790 recognizes a tab character.
4792 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4793 extracting the relevant information from the specification. The man page no
4794 longer contains scrambled data for the -d option, and I've added a section
4795 at the front about calling Exim under different names.
4797 51. Added "extra_headers" argument to the "mail" command in filter files.
4799 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4802 53. Installed eximstats 1.29.
4804 54. Added transport_filter_timeout as a generic transport option.
4806 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4807 Cc: header lines. This was required by RFC 822, but it not required by RFC
4810 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4811 incoming messages that did not have them. Now it does so only if the
4812 message originates locally, that is, if there is no associated remote host
4813 address. When Resent- header lines are present, this applies to the Resent-
4814 lines rather than the non-Resent- lines.
4816 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4817 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4819 58. Messages for configuration errors now include the name of the main
4820 configuration file - useful now that there may be more than one file in a
4821 list (.included file names were always shown).
4823 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4824 for those rare installations that do not start the daemon as root or run it
4825 setuid root. I've cut out the call to initgroups() if the daemon is not
4828 60. The Exim user and group can now be bound into the binary as text strings
4829 that are looked up at the start of Exim's processing.
4831 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4833 62. Added $mailstore_basename variable.
4835 63. Installed patch to sieve.c from Michael Haardt.
4837 64. When Exim failed to open the panic log after failing to open the main log,
4838 the original message it was trying to log was written to stderr and debug
4839 output, but if they were not available (the usual case in production), it
4840 was lost. Now it is written to syslog before the two lines that record the
4841 failures to open the logs.
4843 65. Users' Exim filters run in subprocesses under the user's uid. It is
4844 possible for a "deliver" command or an alias in a "personal" command to
4845 provoke an address rewrite. If logging of address rewriting is configured,
4846 this fails because the process is not running as root or exim. There may be
4847 a better way of dealing with this, but for the moment (because 4.30 needs
4848 to be released), I have disabled address rewrite logging when running a
4849 filter in a non-root, non-exim process.
4855 1. The buildconfig auxiliary program wasn't quoting the value set for
4856 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4857 not defined. This bug was masked in 4.22 by the effect that was fixed in
4860 2. Some messages that were rejected after a message id was allocated were
4861 shown as "incomplete" by exigrep. It no longer does this for messages that
4862 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4864 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4865 have allow_domain_literals set, the ID did not get logged in the <= line.
4866 Domain literals are now always recognized in Message-ID: header lines.
4868 4. The first argument for a ${extract expansion item is the key name or field
4869 number. Leading and trailing spaces in this item were not being ignored,
4870 causing some misleading effects.
4872 5. When deliver_drop_privilege was set, single queue runner processes started
4873 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4874 same command in the process it spins off) were not dropping privilege.
4876 6. When the daemon running as "exim" started a queue runner, it always
4877 re-executed Exim in the spun-off process. This is a waste of effort when
4878 deliver_drop_privilege is set. The new process now just calls the
4879 queue-runner function directly.
4885 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4888 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4889 ignored. Though the use of -oP was forcing the writing of a pid file, it
4890 was always written to the default place.
4892 3. If the message "no IP address found for host xxxx" is generated during
4893 incoming verification, it is now followed by identification of the incoming
4894 connection (so you can more easily find what provoked it).
4896 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4898 5. Added some features to "harden" Exim a bit more against certain attacks:
4900 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4901 be put in Local/Makefile. This is like the never_users runtime option,
4902 but it cannot be overridden. The default setting is "root".
4904 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4905 prefix string with which any file named in a -C command line option
4908 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4909 is retained for -C and -D only if the caller of Exim is root. Without
4910 it, the exim user may also use -C and -D and retain privilege.
4912 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4913 command line option is disabled.
4915 6. Macro names set by the -D option must start with an upper case letter, just
4916 like macro names defined in the configuration file.
4918 7. Added "dereference=" facility to LDAP.
4920 8. Two instances of the typo "uknown" in the source files are fixed.
4922 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4923 the Configure-Makefile script screwed up while processing it.
4925 10. Incorporated PCRE 4.4.
4927 11. The SMTP synchronization check was not operating right at the start of an
4928 SMTP session. For example, it could not catch a HELO sent before the client
4929 waited for the greeting. There is now a check for outstanding input at the
4930 point when the greeting is written. Because of the duplex, asynchronous
4931 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4932 way, but not yet received, when the check is performed.
4934 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4935 on TCP/IP sockets, because this apparently causes some broken clients to
4938 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4939 unchanged) from the Cygwin maintainer.
4941 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4942 was supported instead of testing for mbx. Effectively a typo.
4944 15. The spa authenticator server code was not checking that the input it
4945 received was valid base64.
4947 16. The debug output line for the "set" modifier in ACLs was not showing the
4948 name of the variable that was being set.
4950 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4952 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4953 lookup on its own. Something else was needed to trigger the lookup. For
4954 example, a match in host_lookup or the need for a host name in a host list.
4955 Now, if $sender_host_name is referenced and the host name has not yet been
4956 looked up, a lookup is performed. If the lookup fails, the variable remains
4957 empty, and $host_lookup_failed is set to "1".
4959 19. Added "eqi" as a case-independent comparison operator.
4961 20. The saslauthd authentication condition could segfault if neither service
4962 nor realm was specified.
4964 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4965 error message that was logged was misleading, and incoming SMTP
4966 connections were dropped. The message is now more accurate, and temporary
4967 errors are given to SMTP connections.
4969 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4970 (except RSET) with a 421 error, until QUIT is received. However, it was
4971 failing to send a response to QUIT.
4973 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4974 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4975 ACL is now run after the helo_try_verify_hosts code.
4977 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4978 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4979 case-independent, so other case variants are also recognized). Apparently
4980 some systems use these upper case variants.
4982 25. If more than two messages were waiting for the same host, and a transport
4983 filter was specified for the transport, Exim sent two messages over the
4984 same TCP/IP connection, and then failed with "socket operation on non-
4985 socket" when it tried to send the third.
4987 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4989 27. The extern definition of crypt16() in expand.c was not being excluded when
4990 the OS had its own crypt16() function.
4992 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4993 as a preferred synonym for return_size_limit, both as an option and as an
4996 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4998 30. Changed the default configuration ACL to relax the local part checking rule
4999 for addresses that are not in any local domains. For these addresses,
5000 slashes and pipe symbols are allowed within local parts, but the sequence
5001 /../ is explicitly forbidden.
5003 31. SPA server authentication was not clearing the challenge buffer before
5006 32. log_message in a "warn" ACL statement was writing to the reject log as
5007 well as to the main log, which contradicts the documentation and doesn't
5008 seem right (because no rejection is happening). So I have stopped it.
5010 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5011 However, I am unable to do any testing of this.
5013 34. Fixed an infelicity in the appendfile transport. When checking directories
5014 for a mailbox, to see if any needed to be created, it was accidentally
5015 using path names with one or more superfluous leading slashes; tracing
5016 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5018 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5019 contents are added to the log line that is written for every discarded
5020 recipient. (Previously a log_message setting was ignored.)
5022 36. The ${quote: operator now quotes the string if it is empty.
5024 37. The install script runs exim in order to find its version number. If for
5025 some reason other than non-existence or emptiness, which it checks, it
5026 could not run './exim', it was installing it with an empty version number,
5027 i.e. as "exim-". This error state is now caught, and the installation is
5030 38. An argument was missing from the function that creates an error message
5031 when Exim fails to connect to the socket for saslauthd authentication.
5032 This could cause Exim to crash, or give a corrupted message.
5034 39. Added isip, isip4, and isip6 to ${if conditions.
5036 40. The ACL variables $acl_xx are now saved with the message, and can be
5037 accessed later in routers, transports, and filters.
5039 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5040 strings in the file are not string-expanded.
5042 42. If a MAIL command specified a SIZE value that was too large to fit into an
5043 int variable, the check against message_size_limit failed. Such values are
5044 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5045 day this will have to be increased, but I don't think I want to be around
5046 when emails are that large.
5053 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5054 iconv() is not standard in FreeBSD.
5056 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5057 IPv6 enabled. The observed symptom was a segmentation fault on return from
5058 the function os_common_find_running_interfaces() in src/os.c.
5060 3. In the check_special_case() function in daemon.c I had used "errno" as an
5061 argument name, which causes warnings on some systems. This was basically a
5062 typo, since it was named "eno" in the comments!
5064 4. The code that waits for the clock to tick (at a resolution of some fraction
5065 of a second) so as to ensure message-id uniqueness was always waiting for
5066 at least one whole tick, when it could have waited for less. [This is
5067 almost certainly not relevant at current processor speeds, where it is
5068 unlikely to ever wait at all. But we try to future-proof.]
5070 5. The function that sleeps for a time interval that includes fractions of a
5071 second contained a race. It did not block SIGALRM between setting the
5072 timer, and suspending (a couple of lines later). If the interval was short
5073 and the sigsuspend() was delayed until after it had expired, the suspension
5074 never ended. On busy systems this could lead to processes getting stuck for
5077 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5078 process, before it forks any delivery processes. The open lookup caching
5079 mechanism meant that the open file or database connection was passed into
5080 the delivery process. The problem was that delivery processes always tidy
5081 up cached lookup data. This could cause a problem for the next delivery
5082 process started by the queue runner, because the external queue runner
5083 process does not know about the closure. So the next delivery process
5084 still has data in the lookup cache. In the case of a file lookup, there was
5085 no problem because closing a file descriptor in a subprocess doesn't affect
5086 the parent. However, if the lookup was caching a connection to a database,
5087 the connection was closed, and the second delivery process was likely to
5088 see errors such as "PGSQL: query failed: server closed the connection
5089 unexpectedly". The problem has been fixed by closing all cached lookups
5090 in a queue runner before running a delivery process.
5092 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5093 seem to have the "const" qualifier which it has on other OS. I've
5096 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5097 *of the same type* (client or server) with the same public name that an
5098 error should be diagnosed.
5100 9. When Exim looked up a host name for an IP address, but failed to find the
5101 original IP address when looking up the host name (a safety check), it
5102 output the message "<ip address> does not match any IP for NULL", which was
5103 confusing, to say the least. The bug was that the host name should have
5104 appeared instead of "NULL".
5106 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5107 user that is built into the binary, and the -C or -D options is used, root
5108 privilege is dropped before the configuration file is read. In addition,
5109 logging is switched to stderr instead of the normal log files. If the
5110 configuration then re-defines the Exim user, the unprivileged environment
5111 is probably not what is expected, so Exim logs a panic warning message (but
5114 However, if deliver_drop_privilege is set, the unprivileged state may well
5115 be exactly what is intended, so the warning has been cut out in that case,
5116 and Exim is allowed to try to write to its normal log files.
5122 1. smtp_return_error_details was not giving details for temporary sender
5123 or receiver verification errors.
5125 2. Diagnose a configuration error if two authenticators have the same public
5128 3. Exim used not to create the message log file for a message until the first
5129 delivery attempt. This could be confusing when incoming messages were held
5130 for policy or load reasons. The message log file is now created at the time
5131 the message is received, and an initial "Received" line is written to it.
5133 4. The automatically generated man page for command line options had a minor
5134 bug that caused no ill effects; however, a more serious problem was that
5135 the procedure for building the man page automatically didn't always
5136 operate. Consequently, release 4.20 contains an out-of-date version. This
5137 shouldn't happen again.
5139 5. When building Exim with embedded Perl support, the script that builds the
5140 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5141 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5143 6. The freeze_tell option was not being used for messages that were frozen on
5144 arrival, either by an ACL or by local_scan().
5146 7. Added the smtp_incomplete_transaction log selector.
5148 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5149 was accepting AUTH without a new EHLO.
5151 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5152 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5155 10. Logging of TCP/IP connections (when configured) now happens in the main
5156 daemon process instead of the child process, so that the TCP/IP connection
5157 count is more accurate (but it can never be perfect).
5159 11. The use of "drop" in a nested ACL was not being handled correctly in the
5160 outer ACL. Now, if condition failure induced by the nested "drop" causes
5161 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5162 or "require"), the connection is dropped.
5164 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5165 that yield "discard" can now be used with an "accept" or a "discard" verb,
5166 but an error is generated for any others (because I can't see a useful way
5167 to define what should happen).
5169 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5170 are now processed in the same way as lines in the Exim configuration file.
5171 In particular, continuation lines are supported.
5173 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5175 15. Added -ti meaning -t -i.
5177 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5178 domains, and warn by logging if others are found.
5180 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5181 returned from GIFCONF when Exim is trying to find the list of interfaces on
5182 a host. The code in os.c has been modified to copy each ifreq to an aligned
5183 structure in all cases.
5185 Also, in some cases, the returned ifreq's were being copied to a 'struct
5186 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5187 means the last couple of bytes of an IPv6 address could be chopped if the
5188 ifreq contained only a normal sockaddr (14 bytes storage).
5190 18. Named domain lists were not supported in the hosts_treat_as_local option.
5191 An entry such as +xxxx was not recognized, and was treated as a literal
5194 19. Ensure that header lines added by a DATA ACL are included in the reject log
5195 if the ACL subsequently rejects the message.
5197 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5198 MD5 (which is deprecated).
5200 21. When testing a filter file using -bf, Exim was writing a message when it
5201 took the sender from a "From " line in the message, but it was not doing so
5202 when it took $return_path from a Return-Path: header line. It now does.
5204 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5205 with a valid header line field name (a series of printing characters
5206 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5208 23. Changed "disc" in the source to "disk" to conform to the documentation and
5209 the book and for uniformity.
5211 24. Ignore Sendmail's -Ooption=value command line item.
5213 25. When execve() failed while trying to run a command in a pipe transport,
5214 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5215 could be confused with a return value of 69 from the command itself. This
5216 has been changed to 127, the value the shell returns if it is asked to run
5217 a non-existent command. The wording for the related log line suggests a
5218 non-existent command as the problem.
5220 26. If received_header_text expands to an empty string, do not add a Received:
5221 header line to the message. (Well, it adds a token one on the spool, but
5222 marks it "old" so that it doesn't get used or transmitted.)
5224 27. Installed eximstats 1.28 (addition of -nt option).
5226 28. There was no check for failure on the call to getsockname() in the daemon
5227 code. This can fail if there is a shortage of resources on the system, with
5228 ENOMEM, for example. A temporary error is now given on failure.
5230 29. Contrary to the C standard, it seems that in some environments, the
5231 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5232 program. Exim now does this explicitly; it affects the formatting of
5233 timestamps using strftime().
5235 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5236 complaints. I've now initialized all the variables, to avoid this.
5238 32. Header lines added by a system filter were not being "seen" during
5239 transport-time rewrites.
5241 33. The info_callback() function passed to OpenSSL is set up with type void
5242 (*)(SSL *, int, int), as described somewhere. However, when calling the
5243 function (actually a macro) that sets it up, the type void(*)() is
5244 expected. I've put in a cast to prevent warnings from picky compilers.
5246 34. If a DNS black list lookup found a CNAME record, but there were no A
5247 records associated with the domain it pointed at, Exim crashed.
5249 35. If a DNS black list lookup returned more than one A record, Exim ignored
5250 all but the first. It now scans all returned addresses if a particular IP
5251 value is being sought. In this situation, the contents of the
5252 $dnslist_value variable are a list of all the addresses, separated by a
5255 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5256 to accept a host name and all its aliases if the forward lookup for any of
5257 them yielded the IP address of the incoming connection. Now it accepts only
5258 those names whose forward lookup yields the correct IP address. Any other
5259 names are discarded. This closes a loophole whereby a rogue DNS
5260 administrator could create reverse DNS records to break through a
5261 wildcarded host restriction in an ACL.
5263 37. If a user filter or a system filter that ran in a subprocess used any of
5264 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5265 the wrong values were passed to the pipe command ($thisaddress had the
5266 value of $0, $0 had the value of $1, etc). This bug was introduced by
5267 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5269 38. Improved the line breaking for long SMTP error messages from ACLs.
5270 Previously, if there was no break point between 40 and 75 characters, Exim
5271 left the rest of the message alone. Two changes have been made: (a) I've
5272 reduced the minimum length to 35 characters; (b) if it can't find a break
5273 point between 35 and 75 characters, it looks ahead and uses the first one
5274 that it finds. This may give the occasional overlong line, but at least the
5275 remaining text gets split now.
5277 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5278 file descriptors might be low, and that setting 1000 would always raise it.
5279 It turns out that in some environments, the limit is already over 1000 and
5280 that lowering it causes trouble. So now Exim takes care not to decrease it.
5282 40. When delivering a message, the value of $return_path is set to $sender_
5283 address at the start of routing (routers may change the value). By an
5284 oversight, this default was not being set up when an address was tested by
5285 -bt or -bv, which affected the outcome if any router or filter referred to
5288 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5289 log only when "message" or "log_message" are set. However, if one of the
5290 conditions was an address verification, or a call to a nested ACL, the
5291 messages generated by the underlying test were being passed through. This
5292 no longer happens. The underlying message is available in $acl_verify_
5293 message for both "message" and "log_message" expansions, so it can be
5294 passed through if needed.
5296 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5297 new expansion $bh_ to give the encoded byte string without charset
5298 translation. Translation happens only if iconv() is available; HAVE_ICONV
5299 indicates this at build time. HEADERS_CHARSET gives the charset to
5300 translate to; headers_charset can change it in the configuration, and
5301 "headers charset" can change it in an individual filter file.
5303 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5304 that creates RFC 2047 encoded "words" labels them as that charset instead
5305 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5306 expansion operator; (ii) when Exim creates a From: line for a local
5307 message; (iii) when a header line is rewritten to include a "phrase" part.
5309 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5310 buggy, causing it to skip the first lines of messages whose message ID
5311 ended in 'D'. This would not have bitten before Exim release 4.14, because
5312 message IDs were unlikely to end in 'D' before then. The effect was to have
5313 incorrect size information for certain domains.
5315 45. #include "config.h" was missing at the start of the crypt16.c module. This
5316 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5319 46. If there was a timeout during a "random" callout check, Exim treated it as
5320 a failure of the random address, and carried on sending RSET and the real
5321 address. If the delay was just some slowness somewhere, the response to the
5322 original RCPT would be taken as a response to RSET and so on, causing
5323 mayhem of various kinds.
5325 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5326 when I implemented it. It didn't allow for the fact that some option values
5327 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5328 the right test for positive values.
5330 48. Domain names in DNS records are case-independent. Exim always looks them up
5331 in lower case. Some resolvers return domain names in exactly the case they
5332 appear in the zone file, that is, they may contain uppercase letters. Not
5333 all resolvers do this - some return always lower case. Exim was treating a
5334 change of case by a resolver as a change of domain, similar to a widening
5335 of a domain abbreviation. This triggered its re-routing code and so it was
5336 trying to route what was effectively the same domain again. This normally
5337 caused routing to fail (because the router wouldn't handle the domain
5338 twice). Now Exim checks for this case specially, and just changes the
5339 casing of the domain that it ultimately uses when it transmits the message
5342 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5345 50. If a filter generated a file delivery with a non-absolute name (possible if
5346 no home directory exists for the router), the forbid_file option was not
5349 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5350 the existing equality matching.
5352 52. Exim was using ints instead of ino_t variables in some places where it was
5353 dealing with inode numbers.
5355 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5356 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5357 called TMPDIR, and if it finds it is different, it changes its value.
5359 54. The smtp_printf() function is now made available to local_scan() so
5360 additional output lines can be written before returning. There is also an
5361 smtp_fflush() function to enable the detection of a dropped connection.
5362 The variables smtp_input and smtp_batched_input are exported to
5365 55. Changed the default runtime configuration: the message "Unknown user"
5366 has been removed from the ACL, and instead placed on the localuser router,
5367 using the cannot_route_message feature. This means that any verification
5368 failures that generate their own messages won't get overridden. Similarly,
5369 the "Unrouteable address" message that was in the ACL for unverifiable
5370 relay addresses has also been removed.
5372 56. Added hosts_avoid_esmtp to the smtp transport.
5374 57. The exicyclog script was not checking for the esoteric option
5375 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5376 will work only if exicyclog is run under the appropriate euid.
5378 58. Following a discussion on the list, the rules by which Exim recognises line
5379 endings on incoming messages have been changed. The -dropcr and drop_cr
5380 options are now no-ops, retained only for backwards compatibility. The
5381 following line terminators are recognized: LF CRLF CR. However, special
5382 processing applies to CR:
5384 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5385 nor a local message in the state where . is a terminator.
5387 (ii) If a bare CR is encountered in a header line, an extra space is added
5388 after the line terminator so as not to end the header. The reasoning
5389 behind this is that bare CRs in header lines are most likely either
5390 to be mistakes, or people trying to play silly games.
5392 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5393 was being incorrectly given as 18 bytes larger than it should have been.
5394 This is a VOB (very old bug).
5396 60. This may never have affected anything current, but just in case it has:
5397 When the local host is found other than at the start of a list of hosts,
5398 the local host, those with the same MX, and any that follow, are discarded.
5399 When the list in question was part of a longer list of hosts, the following
5400 hosts (not currently being processed) were also being discarded. This no
5401 longer happens. I'm not sure if this situation could ever has previously
5404 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5407 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5408 header. This is something that is recommended in a new Internet Draft, and
5409 is something that is documented as being done by Sendmail. There are two
5410 possible values. For messages generated by the autoreply transport, Exim
5413 Auto-Submitted: auto-replied
5415 whereas for all other generated messages (e.g. bounces) it adds
5417 Auto-Submitted: auto-generated
5419 63. The "personal" condition in filters now includes a test for the
5420 Auto-Submitted: header. If it contains the string "auto-" the message it
5421 not considered personal.
5423 64. Added rcpt_include_affixes as a generic transport option.
5425 65. Added queue_only_override (default true).
5427 66. Added the syslog_duplication option.
5429 67. If what should have been the first header line of a message consisted of
5430 a space followed by a colon, Exim was mis-interpreting it as a header line.
5431 It isn't of course - it is syntactically invalid and should therefore be
5432 treated as the start of the message body. The misbehaviour could have
5433 caused a number of strange effects, including loss of data in subsequent
5434 header lines, and spool format errors.
5436 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5437 client host had authenticated. This control can now be exercised by an ACL
5438 for more flexibility.
5440 69. By default, callouts do not happen when testing with -bh. There is now a
5441 variant, -bhc, which does actually run the callout code, including
5442 consulting and updating the callout cache.
5444 70. Added support for saslauthd authentication, courtesy of Alexander
5447 71. If statvfs() failed on the spool or log directories while checking their
5448 size for availability, Exim confusingly gave the error "space shortage".
5449 Furthermore, in debugging mode it crashed with a floating point exception.
5450 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5451 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5452 serious problem, Exim now writes to the main and panic logs when this
5453 happens, with details of the failure. It then refuses to accept the
5454 incoming message, giving the message "spool directory problem" or "log
5455 directory problem" with a 421 code for SMTP messages.
5457 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5458 0, 1, and 2 exist, because some OS complain for execs without them (see
5459 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5460 descriptors. However, the code omitted to check that the open succeeded,
5461 causing mysterious errors if for some reason the permissions on /dev/null
5462 got screwed. Now Exim writes a message to the main and panic logs, and
5463 bombs out if it can't open /dev/null.
5465 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5466 interact so that it is all more flexible. It is supposed to remain
5467 backwards compatible. Also added extra_local_interfaces.
5469 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5470 to bomb out with an assertion failure - to the client this appears as a
5471 connection drop. This problem occurs in the part of the code that was taken
5472 from the Samba project. Fortunately, the assertion is in a very simple
5473 function, so I have fixed this by reproducing the function inline in the
5474 one place where it is called, and arranging for authentication to fail
5475 instead of killing the process with assert().
5477 75. The SPA client code was not working when the server requested OEM rather
5478 than Unicode encoding.
5480 76. Added code to make require_files with a specific uid setting more usable in
5481 the case where statting the file as root fails - usually a non-root-mounted
5482 NFS file system. When this happens and the failure is EACCES, Exim now
5483 forks a subprocess and does the per-uid checking as the relevant uid.
5485 77. Added process_log_path.
5487 78. If log_file_path was not explicitly set, a setting of check_log_space or
5488 check_log_inodes was ignored.
5490 79. If a space check for the spool or log partitions fails, the incident is now
5491 logged. Of course, in the latter case the data may get lost...
5493 80. Added the %p formatting code to string_format() so that it can be used to
5494 print addresses in debug_print(). Adjusted all the address printing in the
5495 debugging in store.c to use %p rather than %d.
5497 81. There was a concern that a line of code in smtp_in.c could overflow a
5498 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5499 initially expressed, the concern was not well-founded, because trailing
5500 spaces are removed early. However, if the trailing spaces were followed by
5501 a NULL, they did not get removed, so the overflow was possible. Two fixes
5504 (a) I re-wrote the offending code in a cleaner fashion.
5505 (b) If an incoming SMTP command contains a NULL character, it is rejected
5508 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5509 runs initgroups(), so that if the Exim user is in any additional groups,
5510 they will be used during message reception.
5516 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob