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.
35 PP/08 cyrus_sasl server now expands the server_realm option.
37 PP/09 Bugzilla 1214 - Log authentication information in reject log.
38 Patch by Jeremy Harris.
44 PP/01 Solaris build fix for Oracle's LDAP libraries.
45 Bugzilla 1109, patch from Stephen Usher.
47 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
49 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
52 TF/02 Fix a couple more cases where we did not log the error message
53 when unlink() failed. See also change 4.74-TF/03.
55 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
56 lock up or crash if it happened to be inside a call to libc when it
57 got a SIGUSR1 from exiwhat.
59 The SIGUSR1 handler appends the current process status to the process
60 log which is later printed by exiwhat. It used to use the general
61 purpose logging code to do this, but several functions it calls are
64 The new output code in the SIGUSR1 handler is specific to the process
65 log, and simple enough that it's easy to inspect for signal safety.
66 Removing some special cases also simplifies the general logging code.
67 Removing the spurious timestamps from the process log simplifies
70 TF/04 Improved ratelimit ACL condition.
72 The /noupdate option has been deprecated in favour of /readonly which
73 has clearer semantics. The /leaky, /strict, and /readonly update modes
74 are mutually exclusive. The update mode is no longer included in the
75 database key; it just determines when the database is updated. (This
76 means that when you upgrde Exim will forget old rate measurements.)
78 Exim now checks that the per_* options are used with an update mode that
79 makes sense for the current ACL. For example, when Exim is processing a
80 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
81 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
82 must specify per_mail/readonly. If you omit the update mode it defaults to
83 /leaky where that makes sense (as before) or /readonly where required.
85 The /noupdate option is now undocumented but still supported for
86 backwards compatibility. It is equivalent to /readonly except that in
87 ACLs where /readonly is required you may specify /leaky/noupdate or
88 /strict/noupdate which are treated the same as /readonly.
90 A useful new feature is the /count= option. This is a generalization
91 of the per_byte option, so that you can measure the throughput of other
92 aggregate values. For example, the per_byte option is now equivalent
93 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
95 The per_rcpt option has been generalized using the /count= mechanism
96 (though it's more complicated than the per_byte equivalence). When it is
97 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
98 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
99 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
100 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
101 Note that using per_rcpt with a non-readonly update mode in more than
102 one ACL will cause the recipients to be double-counted. (The per_mail
103 and per_byte options don't have this problem.)
105 The handling of very low rates has changed slightly. If the computed rate
106 is less than the event's count (usually one) then this event is the first
107 after a long gap. In this case the rate is set to the same as this event's
108 count, so that the first message of a spam run is counted properly.
110 The major new feature is a mechanism for counting the rate of unique
111 events. The new per_addr option counts the number of different
112 recipients that someone has sent messages to in the last time period. It
113 behaves like per_rcpt if all the recipient addresses are different, but
114 duplicate recipient addresses do not increase the measured rate. Like
115 the /count= option this is a general mechanism, so the per_addr option
116 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
117 example, measure the rate that a client uses different sender addresses
118 with the options per_mail/unique=$sender_address. There are further
119 details in the main documentation.
121 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
123 TF/06 Removed a few PCRE remnants.
125 TF/07 Automatically extract Exim's version number from tags in the git
126 repository when doing development or release builds.
128 PP/02 Raise smtp_cmd_buffer_size to 16kB.
129 Bugzilla 879. Patch from Paul Fisher.
131 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
132 Heavily based on revision 40f9a89a from Simon Arlott's tree.
135 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
137 PP/05 Variable $av_failed, true if the AV scanner deferred.
138 Bugzilla 1078. Patch from John Horne.
140 PP/06 Stop make process more reliably on build failure.
141 Bugzilla 1087. Patch from Heiko Schlittermann.
143 PP/07 Make maildir_use_size_file an _expandable_ boolean.
144 Bugzilla 1089. Patch from Heiko Schlittermann.
146 PP/08 Handle ${run} returning more data than OS pipe buffer size.
147 Bugzilla 1131. Patch from Holger Weiß.
149 PP/09 Handle IPv6 addresses with SPF.
150 Bugzilla 860. Patch from Wolfgang Breyha.
152 PP/10 GnuTLS: support TLS 1.2 & 1.1.
154 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
157 PP/11 match_* no longer expand right-hand-side by default.
158 New compile-time build option, EXPAND_LISTMATCH_RHS.
159 New expansion conditions, "inlist", "inlisti".
161 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
163 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
165 PP/14 fix log_write() format string regression from TF/03.
166 Bugzilla 1152. Patch from Dmitry Isaikin.
172 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
174 PP/02 Harmonised TLS library version reporting; only show if debugging.
175 Layout now matches that introduced for other libraries in 4.74 PP/03.
177 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
179 PP/04 New "dns_use_edns0" global option.
181 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
184 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
185 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
187 TK/01 Updated PolarSSL code to 0.14.2.
188 Bugzilla 1097. Patch from Andreas Metzler.
190 PP/07 Catch divide-by-zero in ${eval:...}.
193 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
196 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
197 format-string attack -- SECURITY: remote arbitrary code execution.
199 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
200 time unintentionally subject to list matching rules, letting the header
201 cause arbitrary Exim lookups (of items which can occur in lists, *not*
202 arbitrary string expansion). This allowed for information disclosure.
204 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
205 INT_MIN/-1 -- value coerced to INT_MAX.
211 NM/01 Workround for PCRE version dependency in version reporting
214 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
215 This fixes portability to compilers other than gcc, notably
216 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
218 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
219 makefiles for portability to HP-UX and POSIX correctness.
221 PP/01 Permit LOOKUP_foo enabling on the make command-line.
222 Also via indented variable definition in the Makefile.
223 (Debugging by Oliver Heesakkers).
225 PP/02 Restore caching of spamd results with expanded spamd_address.
226 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
228 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
229 Improves build reliability. Fix from: Frank Elsner
231 NM/02 Fix wide character breakage in the rfc2047 coding
232 Fixes bug 1064. Patch from Andrey N. Oktyabrski
234 NM/03 Allow underscore in dnslist lookups
235 Fixes bug 1026. Patch from Graeme Fowler
237 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
238 Code patches from Adam Ciarcinski of NetBSD.
240 NM/04 Fixed exiqgrep to cope with mailq missing size issue
243 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
244 is logged, to avoid truncation. Patch from John Horne.
246 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
247 Patch from Jakob Hirsch.
249 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
250 SQL string expansion failure details.
251 Patch from Andrey Oktyabrski.
253 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
254 Patch from Simon Arlott.
256 PP/09 New lookups functionality failed to compile on old gcc which rejects
257 extern declarations in function scope.
258 Patch from Oliver Fleischmann
260 PP/10 Use sig_atomic_t for flags set from signal handlers.
261 Check getgroups() return and improve debugging.
262 Fixed developed for diagnosis in bug 927 (which turned out to be
265 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
266 Patch from Mark Zealey.
268 PP/12 Bugzilla 1056: Improved spamd server selection.
269 Patch from Mark Zealey.
271 PP/13 Bugzilla 1086: Deal with maildir quota file races.
272 Based on patch from Heiko Schlittermann.
274 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
275 Patch from Uwe Doering, sign-off by Michael Haardt.
277 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
278 variable declaration deep within a block. Bug and patch from
281 PP/15 lookups-Makefile IRIX compatibilty coercion.
283 PP/16 Make DISABLE_DKIM build knob functional.
285 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
286 Patch by Simon Arlott
288 TF/03 Fix valgrind.h portability to C89 compilers that do not support
289 variable argument macros. Our copy now differs from upstream.
295 TF/01 Failure to get a lock on a hints database can have serious
296 consequences so log it to the panic log.
298 TF/02 Log LMTP confirmation messages in the same way as SMTP,
299 controlled using the smtp_confirmation log selector.
301 TF/03 Include the error message when we fail to unlink a spool file.
303 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
304 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
305 for maintaining out-of-tree patches for some time.
307 PP/01 Bugzilla 139: Documentation and portability issues.
308 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
309 Handle per-OS dynamic-module compilation flags.
311 PP/02 Let /dev/null have normal permissions.
312 The 4.73 fixes were a little too stringent and complained about the
313 permissions on /dev/null. Exempt it from some checks.
314 Reported by Andreas M. Kirchwitz.
316 PP/03 Report version information for many libraries, including
317 Exim version information for dynamically loaded libraries. Created
318 version.h, now support a version extension string for distributors
319 who patch heavily. Dynamic module ABI change.
321 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
322 privilege escalation vulnerability whereby the Exim run-time user
323 can cause root to append content of the attacker's choosing to
326 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
329 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
330 If dropping privileges for untrusted macros, we disabled normal logging
331 on the basis that it would fail; for the Exim run-time user, this is not
332 the case, and it resulted in successful deliveries going unlogged.
333 Fixed. Reported by Andreas Metzler.
339 PP/01 Date: & Message-Id: revert to normally being appended to a message,
340 only prepend for the Resent-* case. Fixes regression introduced in
341 Exim 4.70 by NM/22 for Bugzilla 607.
343 PP/02 Include check_rfc2047_length in configure.default because we're seeing
344 increasing numbers of administrators be bitten by this.
346 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
348 PP/03 Bugzilla 994: added openssl_options main configuration option.
350 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
352 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
354 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
356 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
357 without a peer certificate, leading to a segfault because of an
358 assumption that peers always have certificates. Be a little more
359 paranoid. Problem reported by Martin Tscholak.
361 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
362 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
363 NB: ClamAV planning to remove STREAM in "middle of 2010".
364 CL also introduces -bmalware, various -d+acl logging additions and
365 more caution in buffer sizes.
367 PP/09 Implemented reverse_ip expansion operator.
369 PP/10 Bugzilla 937: provide a "debug" ACL control.
371 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
373 PP/12 Bugzilla 973: Implement --version.
375 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
377 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
379 PP/15 Bugzilla 816: support multiple condition rules on Routers.
381 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
382 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
383 ignore trailing whitespace.
385 JJ/02 prevent non-panic DKIM error from being sent to paniclog
387 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
390 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
391 Notification from Dr Andrew Aitchison.
393 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
394 ExtendedDetectionInfo response format.
395 Notification from John Horne.
397 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
400 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
401 XSL and documented dependency on system catalogs, with examples of how
404 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
407 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
408 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
409 configuration file which is writeable by the Exim user or group.
411 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
412 of configuration files to cover files specified with the -C option if
413 they are going to be used with root privileges, not just the default
416 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
417 option (effectively making it always true).
419 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
420 files to be used while preserving root privileges.
422 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
423 that rogue child processes cannot use them.
425 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
426 run-time user, instead of root.
428 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
429 Exim run-time user without dropping privileges.
431 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
432 result string, instead of calling string_vformat() twice with the same
435 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
436 for other users. Others should always drop root privileges if they use
437 -C on the command line, even for a whitelisted configure file.
439 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
441 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
447 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
448 $data_path, and $header_path variables; fixed documentation bugs and
451 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
452 exipick to access non-standard spools, including the "frozen" queue
455 NM/01 Bugzilla 965: Support mysql stored procedures.
456 Patch from Alain Williams
458 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
460 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
461 Patch from Andreas Metzler
463 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
464 Patch from Kirill Miazine
466 NM/05 Bugzilla 671: Added umask to procmail example.
468 JJ/03 installed exipick 20100323.0, fixing doc bug
470 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
471 directory. Notification and patch from Dan Rosenberg.
473 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
475 TK/02 Improve log output when DKIM signing operation fails.
477 MH/01 Treat the transport option dkim_domain as a colon separated
478 list, not as a single string, and sign the message with each element,
479 omitting multiple occurences of the same signer.
481 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
482 Bugzilla 985, 986. Patch by Simon Arlott
484 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
485 Patch by Simon Arlott
487 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
488 MBX locking. Notification from Dan Rosenberg.
494 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
496 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
498 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
500 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
502 NM/04 Bugzilla 915: Flag broken perl installation during build.
508 TK/01 Added patch by Johannes Berg that expands the main option
509 "spamd_address" if it starts with a dollar sign.
511 TK/02 Write list of recipients to X-Envelope-Sender header when building
512 the mbox-format spool file for content scanning (suggested by Jakob
515 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
516 (http://www.dcc-servers.net/) support via dccifd. Activated by
517 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
519 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
520 by Mark Daniel Reidel <mr@df.eu>.
522 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
523 When building exim an external PCRE library is now needed -
524 PCRE is a system library on the majority of modern systems.
525 See entry on PCRE_LIBS in EDITME file.
527 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
528 conversation. Added nologin parameter to request.
529 Patch contributed by Kirill Miazine.
531 TF/01 Do not log submission mode rewrites if they do not change the address.
533 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
535 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
536 log files in place. Contributed by Roberto Lima.
538 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
540 TF/03 Bugzilla 615: When checking the local_parts router precondition
541 after a local_part_suffix or local_part_prefix option, Exim now
542 does not use the address's named list lookup cache, since this
543 contains cached lookups for the whole local part.
545 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
546 Robert Millan. Documentation is in experimental-spec.txt.
548 TF/04 Bugzilla 668: Fix parallel build (make -j).
550 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
552 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
553 Patch provided by Jan Srzednicki.
555 TF/05 Leading white space used to be stripped from $spam_report which
556 wrecked the formatting. Now it is preserved.
558 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
559 that they are available at delivery time.
561 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
563 TF/08 TLS error reporting now respects the incoming_interface and
564 incoming_port log selectors.
566 TF/09 Produce a more useful error message if an SMTP transport's hosts
567 setting expands to an empty string.
569 NM/06 Bugzilla 744: EXPN did not work under TLS.
570 Patch provided by Phil Pennock.
572 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
573 Patch provided by Richard Godbee.
575 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
576 acl_smtp_notquit, added index entry.
578 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
579 Patch provided by Eugene Bujak.
581 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
582 accept(). Patch provided by Maxim Dounin.
584 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
585 Patch provided by Phil Pennock.
587 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
589 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
590 Patch provided by Brad "anomie" Jorsch.
592 NM/14 Bugzilla 622: Added timeout setting to transport filter.
593 Patch provided by Dean Brooks.
595 TK/05 Add native DKIM support (does not depend on external libraries).
597 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
598 Patch provided by Graeme Fowler.
600 NM/16 Bugzilla 851: Documentation example syntax fix.
602 NM/17 Changed NOTICE file to remove references to embedded PCRE.
604 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
607 NM/19 Bugzilla 745: TLS version reporting.
608 Patch provided by Phil Pennock.
610 NM/20 Bugzilla 167: bool: condition support.
611 Patch provided by Phil Pennock.
613 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
614 clients. Patch provided by Phil Pennock.
616 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
617 Patch provided by Brad "anomie" Jorsch.
619 NM/23 Bugzilla 687: Fix misparses in eximstats.
620 Patch provided by Heiko Schlittermann.
622 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
623 Patch provided by Heiko Schlittermann.
625 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
626 plus update to original patch.
628 NM/26 Bugzilla 799: Documentation correction for ratelimit.
630 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
631 Patch provided by David Brownlee.
633 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
635 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
637 NM/30 Bugzilla 888: TLS documentation bugfixes.
639 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
641 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
642 Unlike the original bugzilla I have changed all shell scripts in src tree.
644 NM/33 Bugzilla 898: Transport filter timeout fix.
645 Patch by Todd Rinaldo.
647 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
648 Patch by Serge Demonchaux.
650 NM/35 Bugzilla 39: Base64 decode bug fixes.
651 Patch by Jakob Hirsch.
653 NM/36 Bugzilla 909: Correct connect() call in dcc code.
655 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
657 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
659 NM/39 Bugzilla 911: Fixed MakeLinks build script.
665 TK/01 Add preliminary DKIM support. Currently requires a forked version of
666 ALT-N's libdkim that I have put here:
667 http://duncanthrax.net/exim-experimental/
669 Note to Michael Haardt: I had to rename some vars in sieve.c. They
670 were called 'true' and it seems that C99 defines that as a reserved
671 keyword to be used with 'bool' variable types. That means you could
672 not include C99-style headers which use bools without triggering
673 build errors in sieve.c.
675 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
676 as mailq or other aliases. Changed the --help handling significantly
677 to do whats expected. exim_usage() emits usage/help information.
679 SC/01 Added the -bylocaldomain option to eximstats.
681 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
683 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
685 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
691 PH/01 Another patch from the Sieve maintainer.
693 PH/02 When an IPv6 address is converted to a string for single-key lookup
694 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
695 dots are used instead of colons so that keys in lsearch files need not
696 contain colons. This was done some time before quoting was made available
697 in lsearch files. However, iplsearch files do require colons in IPv6 keys
698 (notated using the quote facility) so as to distinguish them from IPv4
699 keys. This meant that lookups for IP addresses in host lists did not work
700 for iplsearch lookups.
702 This has been fixed by arranging for IPv6 addresses to be expressed with
703 colons if the lookup type is iplsearch. This is not incompatible, because
704 previously such lookups could never work.
706 The situation is now rather anomolous, since one *can* have colons in
707 ordinary lsearch keys. However, making the change in all cases is
708 incompatible and would probably break a number of configurations.
710 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
713 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
714 conversion specification without a maximum field width, thereby enabling
715 a rogue spamd server to cause a buffer overflow. While nobody in their
716 right mind would setup Exim to query an untrusted spamd server, an
717 attacker that gains access to a server running spamd could potentially
718 exploit this vulnerability to run arbitrary code as the Exim user.
720 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
721 $primary_hostname instead of what libspf2 thinks the hosts name is.
723 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
724 a directory entry by the name of the lookup key. Previously, if a
725 symlink pointed to a non-existing file or a file in a directory that
726 Exim lacked permissions to read, a lookup for a key matching that
727 symlink would fail. Now it is enough that a matching directory entry
728 exists, symlink or not. (Bugzilla 503.)
730 PH/03 The body_linecount and body_zerocount variables are now exported in the
733 PH/04 Added the $dnslist_matched variable.
735 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
736 This means they are set thereafter only if the connection becomes
739 PH/06 Added the client_condition to authenticators so that some can be skipped
740 by clients under certain conditions.
742 PH/07 The error message for a badly-placed control=no_multiline_responses left
743 "_responses" off the end of the name.
745 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
747 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
748 (without spaces) instead of just copying the configuration text.
750 PH/10 Added the /noupdate option to the ratelimit ACL condition.
752 PH/11 Added $max_received_linelength.
754 PH/12 Added +ignore_defer and +include_defer to host lists.
756 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
757 way in which PCRE > 7.0 is built.
759 PH/14 Implemented queue_only_load_latch.
761 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
762 MAIL command. The effect was to mangle the value on 64-bit systems.
764 PH/16 Another patch from the Sieve maintainer.
766 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
768 PH/18 If a system quota error occurred while trying to create the file for
769 a maildir delivery, the message "Mailbox is full" was not appended to the
770 bounce if the delivery eventually timed out. Change 4.67/27 below applied
771 only to a quota excession during the actual writing of the file.
773 PH/19 It seems that peer DN values may contain newlines (and other non-printing
774 characters?) which causes problems in log lines. The DN values are now
775 passed through string_printing() before being added to log lines.
777 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
778 and InterBase are left for another time.)
780 PH/21 Added message_body_newlines option.
782 PH/22 Guard against possible overflow in moan_check_errorcopy().
784 PH/23 POSIX allows open() to be a macro; guard against that.
786 PH/24 If the recipient of an error message contained an @ in the local part
787 (suitably quoted, of course), incorrect values were put in $domain and
788 $local_part during the evaluation of errors_copy.
794 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
795 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
798 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
799 issue a MAIL command.
801 PH/02 In an ACL statement such as
803 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
805 if a client was not listed at all, or was listed with a value other than
806 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
807 the condition was not true (as it should be), so access was not denied.
808 The bug was that the ! inversion was incorrectly passed on to the second
809 item. This has been fixed.
811 PH/03 Added additional dnslists conditions == and =& which are different from
812 = and & when the dns lookup returns more than one IP address.
814 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
815 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
817 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
818 FSYNC, which compiles an option called disable_fsync that allows for
819 bypassing fsync(). The documentation is heavily laced with warnings.
821 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
823 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
824 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
825 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
826 including adding "make clean"; (3) Added -fPIC when compiling the test
827 dynamically loaded module, to get rid of a warning.
829 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
830 message fails, move_frozen_messages = true and ignore_bounce_errors_after
831 = 0s. The bug is otherwise harmless.
833 PH/07 There was a bug in the dovecot authenticator such that the value of
834 $auth1 could be overwritten, and so not correctly preserved, after a
835 successful authentication. This usually meant that the value preserved by
836 the server_setid option was incorrect.
838 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
840 PH/09 Installed PCRE release 7.0.
842 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
843 run for batched SMTP input. It is now run at the start of every message
844 in the batch. While fixing this I discovered that the process information
845 (output by running exiwhat) was not always getting set for -bs and -bS
846 input. This is fixed, and it now also says "batched" for BSMTP.
848 PH/11 Added control=no_pipelining.
850 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
851 patch, slightly modified), and move the expansion of helo_data till after
852 the connection is made in the smtp transport (so it can use these
855 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
857 PH/14 Added log_selector = +pid.
859 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
861 PH/16 Add ${if forany and ${if forall.
863 PH/17 Added dsn_from option to vary the From: line in DSNs.
865 PH/18 Flush SMTP output before performing a callout, unless control =
866 no_callout_flush is set.
868 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
869 was true (the default) a successful delivery failed to delete the retry
870 item, thus causing premature timeout of the address. The bug is now
873 PH/20 Added hosts_avoid_pipelining to the smtp transport.
875 PH/21 Long custom messages for fakedefer and fakereject are now split up
876 into multiline reponses in the same way that messages for "deny" and
877 other ACL rejections are.
879 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
880 with slight modification.
882 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
883 draft, changing the syntax and factoring some duplicate code".
885 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
886 for deliveries of the second and subsequent messages over the same SMTP
889 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
890 ${reduce, with only minor "tidies".
892 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
894 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
895 expansion side effects.
897 PH/27 When a message times out after an over-quota error from an Exim-imposed
898 quota, the bounce message says "mailbox is full". This message was not
899 being given when it was a system quota that was exceeded. It now should
902 MH/03 Made $recipients available in local_scan(). local_scan() already has
903 better access to the recipient list through recipients_list[], but
904 $recipients can be useful in postmaster-provided expansion strings.
906 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
907 in the case of a MAIL command with additional options following the
908 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
909 were accidentally chopped off.
911 PH/29 SMTP synchronization checks are implemented when a command is read -
912 there is a check that no more input is waiting when there shouldn't be
913 any. However, for some commands, a delay in an ACL can mean that it is
914 some time before the response is written. In this time, more input might
915 arrive, invalidly. So now there are extra checks after an ACL has run for
916 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
917 pipelining has not been advertised.
919 PH/30 MH's patch to allow iscntrl() characters to be list separators.
921 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
922 returned in the SMTP response when smtp_return_error_details was false.
925 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
926 instead of the C I/O that was originally supplied, because problems were
929 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
930 Exim which did not show up earlier: it was assuming that a call to
931 SSL_CTX_set_info_callback() might give an error value. In fact, there is
932 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
933 was a macro that became an assignment, so it seemed to work. This has
934 changed to a proper function call with a void return, hence the compile
935 error. Exim's code has been fixed.
937 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
940 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
942 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
944 PH/37 If a message is not accepted after it has had an id assigned (e.g.
945 because it turns out to be too big or there is a timeout) there is no
946 "Completed" line in the log. When some messages of this type were
947 selected by exigrep, they were listed as "not completed". Others were
948 picked up by some special patterns. I have improved the selection
949 criteria to be more general.
951 PH/38 The host_find_failed option in the manualroute router can now be set
952 to "ignore", to completely ignore a host whose IP address cannot be
953 found. If all hosts are ignored, the behaviour is controlled by the new
954 host_all_ignored option.
956 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
957 homing or because of multiple MX records with /mx) generated more than
958 one IP address, and the following item turned out to be the local host,
959 all the secondary addresses of the first item were incorrectly removed
960 from the list, along with the local host and any following hosts (which
961 is what is supposed to happen).
963 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
964 whoever called Exim into the -H file. In the case of the daemon it was
965 behaving confusingly. When first started, it used values for whoever
966 started the daemon, but after a SIGHUP it used the Exim user (because it
967 calls itself on a restart). I have changed the code so that it now always
970 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
971 message are rejected with the same error (e.g. no authentication or bad
972 sender address), and a DATA command is nevertheless sent (as can happen
973 with PIPELINING or a stupid MUA), the error message that was given to the
974 RCPT commands is included in the rejection of the DATA command. This is
975 intended to be helpful for MUAs that show only the final error to their
978 PH/42 Another patch from the Sieve maintainer.
980 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
981 Eximstats - Fixed some broken HTML links and added missing column headers
983 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
984 columns for Rejects, Temp Rejects, Ham, and Spam rows.
986 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
988 PH/43 Yet another patch from the Sieve maintainer.
990 PH/44 I found a way to check for a TCP/IP connection going away before sending
991 the response to the final '.' that terminates a message, but only in the
992 case where the client has not sent further data following the '.'
993 (unfortunately, this is allowed). However, in many cases there won't be
994 any further data because there won't be any more messages to send. A call
995 to select() can be used: if it shows that the input is "ready", there is
996 either input waiting, or the socket has been closed. An attempt to read
997 the next input character can distinguish the two cases. Previously, Exim
998 would have sent an OK response which the client would never have see.
999 This could lead to message repetition. This fix should cure that, at
1000 least in a lot of common cases.
1002 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1003 advertised in response to EHLO.
1009 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1010 fixed by 4.65/MH/01 (is this a record?) are fixed:
1012 (i) An empty string was always treated as zero by the numeric comparison
1013 operators. This behaviour has been restored.
1015 (ii) It is documented that the numeric comparison operators always treat
1016 their arguments as decimal numbers. This was broken in that numbers
1017 starting with 0 were being interpreted as octal.
1019 While fixing these problems I realized that there was another issue that
1020 hadn't been noticed. Values of message_size_limit (both the global option
1021 and the transport option) were treated as octal if they started with 0.
1022 The documentation was vague. These values are now always treated as
1023 decimal, and I will make that clear in the documentation.
1029 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1030 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1033 MH/01 Don't check that the operands of numeric comparison operators are
1034 integers when their expansion is in "skipping" mode (fixes bug
1035 introduced by 4.64-PH/07).
1037 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1038 child addresses, Exim now panics and dies. Previously, because the count
1039 is held in a short int, deliveries were likely to be lost. As such a
1040 large number of recipients for a single message is ridiculous
1041 (performance will be very, very poor), I have chosen to impose a limit
1042 rather than extend the field.
1048 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1049 leftover -K file (the existence of which was triggered by #402).
1050 While we were at it, introduced process PID as part of the -K
1051 filename. This should rule out race conditions when creating
1054 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1055 processing considerably. Previous code took too long for large mails,
1056 triggering a timeout which in turn triggers #401.
1058 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1059 in the DK code in transports.c. sendfile() is not really portable,
1060 hence the _LINUX specificness.
1062 TF/01 In the add_headers option to the mail command in an Exim filter,
1063 there was a bug that Exim would claim a syntax error in any
1064 header after the first one which had an odd number of characters
1067 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1068 callout verification, Exim cached a "reject" for the entire domain. This
1069 is correct for most verifications, but it is not correct for a recipient
1070 verification with use_sender or use_postmaster set, because in that case
1071 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1072 case of MAIL FROM:<> rejection from other early rejections (e.g.
1073 rejection of HELO). When verifying a recipient using a non-null MAIL
1074 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1075 Whatever the result of the callout, the value of the domain cache is
1076 left unchanged (for any other kind of callout, getting as far as trying
1077 RCPT means that the domain itself is ok).
1079 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1082 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1083 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1084 session, the daemon ignores ECONNECT errors and logs others; it now
1085 ignores EPIPE as well.
1087 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1088 (quoted-printable decoding).
1090 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1091 later the small subsequent patch to fix an introduced bug.
1093 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1095 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1097 PH/08 An error is now given if message_size_limit is specified negative.
1099 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1100 to be given (somewhat) arbitrary names.
1102 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1105 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1106 miscellaneous code fixes
1108 PH/10 Added the log_reject_target ACL modifier to specify where to log
1111 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1112 hostname. This is wrong, because it relates to the incoming message (and
1113 probably the interface on which it is arriving) and not to the outgoing
1114 callout (which could be using a different interface). This has been
1115 changed to use the value of the helo_data option from the smtp transport
1116 instead - this is what is used when a message is actually being sent. If
1117 there is no remote transport (possible with a router that sets up host
1118 addresses), $smtp_active_hostname is used.
1120 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1121 tweaks were necessary in order to get it to work (see also 21 below):
1122 (a) The code assumed that strncpy() returns a negative number on buffer
1123 overflow, which isn't the case. Replaced with Exim's string_format()
1125 (b) There were several signed/unsigned issues. I just did the minimum
1126 hacking in of casts. There is scope for a larger refactoring.
1127 (c) The code used strcasecmp() which is not a standard C function.
1128 Replaced with Exim's strcmpic() function.
1129 (d) The code set only $1; it now sets $auth1 as well.
1130 (e) A simple test gave the error "authentication client didn't specify
1131 service in request". It would seem that Dovecot has changed its
1132 interface. Fortunately there's a specification; I followed it and
1133 changed what the client sends and it appears to be working now.
1135 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1138 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1139 address A is aliased to B and C, where B exists and C does not. Without
1140 -v the output is "A verified" because verification stops after a
1141 successful redirection if more than one address is generated. However,
1142 with -v the child addresses are also verified. Exim was outputting "A
1143 failed to verify" and then showing the successful verification for C,
1144 with its parentage. It now outputs "B failed to verify", showing B's
1145 parentage before showing the successful verification of C.
1147 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1148 look up a TXT record in a specific list after matching in a combined
1151 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1152 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1153 they consult the DNS. I had assumed they would set it the way they
1154 wanted; and indeed my experiments on Linux seem to show that in some
1155 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1156 To be on the safe side, however, I have now made the interface to
1157 host_find_byname() similar to host_find_bydns(), with an argument
1158 containing the DNS resolver options. The host_find_byname() function now
1159 sets these options at its start, just as host_find_bydns() does. The smtp
1160 transport options dns_qualify_single and dns_search_parents are passed to
1161 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1162 of host_find_byname() use the default settings of RES_DEFNAMES
1163 (qualify_single) but not RES_DNSRCH (search_parents).
1165 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1166 spool_read_header() do less string testing, by means of a preliminary
1167 switch on the second character of optional "-foo" lines. (This is
1168 overdue, caused by the large number of possibilities that now exist.
1169 Originally there were few.) While I was there, I also converted the
1170 str(n)cmp tests so they don't re-test the leading "-" and the first
1171 character, in the hope this might squeeze out yet more improvement.
1173 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1174 flag allowing group syntax was set by the header_syntax check but not
1175 turned off, possible causing trouble later; (2) The flag was not being
1176 set at all for the header_verify test, causing "group"-style headers to
1177 be rejected. I have now set it in this case, and also caused header_
1178 verify to ignore an empty address taken from a group. While doing this, I
1179 came across some other cases where the code for allowing group syntax
1180 while scanning a header line wasn't quite right (mostly, not resetting
1181 the flag correctly in the right place). These bugs could have caused
1182 trouble for malformed header lines. I hope it is now all correct.
1184 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1185 with the "reply" argument non-NULL. The code, however (which originally
1186 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1187 but it didn't always do it. This confused somebody who was copying the
1188 code for some other use. I have removed all the tests.
1190 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1191 feature that was used to support insecure browsers during the U.S. crypto
1192 embargo. It requires special client support, and Exim is probably the
1193 only MTA that supported it -- and would never use it because real RSA is
1194 always available. This code has been removed, because it had the bad
1195 effect of slowing Exim down by computing (never used) parameters for the
1196 RSA_EXPORT functionality.
1198 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1199 authenticator to fail if there's a tab character in the incoming data
1200 (there should never be unless someone is messing about, as it's supposed
1201 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1202 if the connection is using TLS or if the remote IP is the same as the
1203 local IP, and the "valid-client-cert option" if a client certificate has
1206 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1207 authenticators. This can be used for authorization after authentication
1208 succeeds. (In the case of plaintext, it servers for both authentication
1211 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1212 if any retry times were supplied.
1214 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1215 connection, where there is no client IP address to check. In this
1216 situation, the verify now always succeeds.
1218 PH/25 Applied John Jetmore's -Mset patch.
1220 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1222 PH/27 In a string expansion for a processed (not raw) header when multiple
1223 headers of the same name were present, leading whitespace was being
1224 removed from all of them, but trailing whitespace was being removed only
1225 from the last one. Now trailing whitespace is removed from each header
1226 before concatenation. Completely empty headers in a concatenation (as
1227 before) are ignored.
1229 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1230 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1232 PH/29 [Removed. This was a change that I later backed out, and forgot to
1233 correct the ChangeLog entry (that I had efficiently created) before
1234 committing the later change.]
1236 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1237 address errors (4xx response to RCPT) over the same connection as other
1238 messages routed to the same hosts. Such deliveries are always "forced",
1239 so retry times are not inspected. This resulted in far too many retries
1240 for the affected addresses. The effect occurred only when there were more
1241 hosts than the hosts_max_try setting in the smtp transport when it had
1242 the 4xx errors. Those hosts that it had tried were not added to the list
1243 of hosts for which the message was waiting, so if all were tried, there
1244 was no problem. Two fixes have been applied:
1246 (i) If there are any address or message errors in an SMTP delivery, none
1247 of the hosts (tried or untried) are now added to the list of hosts
1248 for which the message is waiting, so the message should not be a
1249 candidate for sending over the same connection that was used for a
1250 successful delivery of some other message. This seems entirely
1251 reasonable: after all the message is NOT "waiting for some host".
1252 This is so "obvious" that I'm not sure why it wasn't done
1253 previously. Hope I haven't missed anything, but it can't do any
1254 harm, as the worst effect is to miss an optimization.
1256 (ii) If, despite (i), such a delivery is accidentally attempted, the
1257 routing retry time is respected, so at least it doesn't keep
1258 hammering the server.
1260 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1261 in ${readsocket because some servers need this prod.
1263 PH/32 Added some extra debug output when updating a wait-xxx database.
1265 PH/33 The hint "could be header name not terminated by colon", which has been
1266 given for certain expansion errors for a long time, was not being given
1267 for the ${if def:h_colon_omitted{... case.
1269 PH/34 The spec says: "With one important exception, whenever a domain list is
1270 being scanned, $domain contains the subject domain." There was at least
1271 one case where this was not true.
1273 PH/35 The error "getsockname() failed: connection reset by peer" was being
1274 written to the panic log as well as the main log, but it isn't really
1275 panic-worthy as it just means the connection died rather early on. I have
1276 removed the panic log writing for the ECONNRESET error when getsockname()
1279 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1280 runs only) independently of the message's sender address. This meant
1281 that, if the 4xx error was in fact related to the sender, a different
1282 message to the same recipient with a different sender could confuse
1283 things. In particualar, this can happen when sending to a greylisting
1284 server, but other circumstances could also provoke similar problems.
1285 I have changed the default so that the retry time for these errors is now
1286 based a combination of the sender and recipient addresses. This change
1287 can be overridden by setting address_retry_include_sender=false in the
1290 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1291 remote server are returned as part of bounce messages. This was not
1292 happening for LMTP over a pipe (the lmtp transport), but now it is the
1293 same for both kinds of LMTP.
1295 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1296 in header lines that were in fact CNAMEs. This is no longer the case.
1298 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1299 and queue runs started by the daemon processed all messages. This has
1300 been fixed so that -R and -S can now usefully be given with -q<time>.
1302 PH/40 Import PCRE release 6.7 (fixes some bugs).
1304 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1306 PH/42 Give an error if -q is specified more than once.
1308 PH/43 Renamed the variables $interface_address and $interface_port as
1309 $received_ip_address and $received_port, to make it clear that these
1310 values apply to message reception, and not to the outgoing interface when
1311 a message is delivered. (The old names remain recognized, of course.)
1313 PH/44 There was no timeout on the connect() call when using a Unix domain
1314 socket in the ${readsocket expansion. There now is.
1316 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1317 be meaningful with "accept".
1319 SC/01 Eximstats V1.43
1320 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1322 SC/02 Eximstats V1.44
1323 Use a glob alias rather than an array ref in the generated
1324 parser. This improves both readability and performance.
1326 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1327 Collect SpamAssassin and rejection statistics.
1328 Don't display local sender or destination tables unless
1329 there is data to show.
1330 Added average volumes into the top table text output.
1332 SC/04 Eximstats V1.46
1333 Collect data on the number of addresses (recipients)
1334 as well as the number of messages.
1336 SC/05 Eximstats V1.47
1337 Added 'Message too big' to the list of mail rejection
1338 reasons (thanks to Marco Gaiarin).
1340 SC/06 Eximstats V1.48
1341 Mainlog lines which have GMT offsets and are too short to
1342 have a flag are now skipped.
1344 SC/07 Eximstats V1.49 (Alain Williams)
1345 Added the -emptyok flag.
1347 SC/08 Eximstats V1.50
1348 Fixes for obtaining the IP address from reject messages.
1350 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1351 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1352 whitesspace changes from 4.64-PH/27
1354 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1357 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1358 are found, allow negative numbers in numeric criteria)
1360 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1362 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1363 to match changes made in 4.64-PH/43
1365 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1367 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1368 "domain" is actually an IP address, and force a failure. This locks out
1369 those revolvers/nameservers that support "A-for-A" lookups, in
1370 contravention of the specifications.
1372 PH/48 When a host name was looked up from an IP address, and the subsequent
1373 forward lookup of the name timed out, the host name was left in
1374 $sender_host_name, contrary to the specification.
1376 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1377 restricted to single-key lookups, Exim was not diagnosing an error if
1378 * or *@ was used with a query-style lookup.
1380 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1382 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1383 long ago, but noone interested enough thought of it. Let's just say that
1384 the "1.1" means that there are some new functions that weren't there at
1385 some point in the past.
1387 PH/51 Error processing for expansion failure of helo_data from an smtp
1388 transport during callout processing was broken.
1390 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1391 tested/used via the -bh/-bhc/-bs options.
1393 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1394 bug, fixed in subsequent PCRE releases).
1396 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1397 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1399 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1405 SC/01 Use a glob alias rather than an array ref in eximstats generated
1406 parser. This improves both readability and performance.
1408 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1409 Don't display local sender or destination tables in eximstats unless
1410 there is data to show.
1411 Added average volumes into the eximstats top table text output.
1413 SC/03 Collect data on the number of addresses (recipients) as well
1414 as the number of messages in eximstats.
1416 TF/01 Correct an error in the documentation for the redirect router. Exim
1417 does (usually) call initgroups() when daemonizing.
1419 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1420 with consistent privilege compared to when running as a daemon.
1422 TF/03 Note in the spec that $authenticated_id is not set for local
1423 submissions from trusted users.
1425 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1426 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1428 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1429 by adding some example configuration directives to the default
1430 configuration file. A little bit of work is required to uncomment the
1431 directives and define how usernames and passwords are checked, but
1432 there is now a framework to start from.
1434 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1435 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1436 without this. I don't know how relevant this is to other LDAP libraries.
1438 PH/02 Add the verb name to the "unknown ACL verb" error.
1440 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1442 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1444 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1445 directory not expanded when it should be if an expanded home directory
1446 was set for the address (which is overridden by the transport).
1448 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1451 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1452 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1453 because it is too late at that time, and has no effect.
1455 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1456 security issue with \' (bugzilla #107). I could not use the
1457 PQescapeStringConn() function, because it needs a PGconn value as one of
1460 PH/08 When testing addresses using -bt, indicate those final addresses that
1461 are duplicates that would not cause an additional delivery. At least one
1462 person was confused, thinking that -bt output corresponded to deliveries.
1463 (Suppressing duplicates isn't a good idea as you lose the information
1464 about possibly different redirections that led to the duplicates.)
1466 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1467 systems where poll() doesn't work, in particular OS X.
1469 PH/10 Added more information to debugging output for retry time not reached.
1471 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1472 operations in malware.c.
1474 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1477 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1478 syslog_duplication set false, log lines that would normally be written
1479 both the the main log and to the reject log were not written to syslog at
1482 PH/14 In the default configuration, change the use of "message" in ACL warn
1483 statements to "add_header".
1485 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1486 not followed by a command (e.g. "seen endif").
1488 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1489 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1492 PH/17 Added extra conditions to the default value of delay_warning_condition
1496 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1497 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1498 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1501 The Auto-Submitted: and various List- headers are standardised, whereas I
1502 don't think Precedence: ever was.
1504 PH/18 Refactored debugging code in route_finduser() to show more information,
1505 in particular, the error code if getpwnam() issues one.
1507 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1508 This is apparently needed in addition to the PH/07 change above to avoid
1509 any possible encoding problems.
1511 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1512 but not after initializing Perl.
1514 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1515 output them only if debugging. By default they are written stderr,
1516 apparently, which is not desirable.
1518 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1521 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1524 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1526 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1527 authenticated or an ident call has been made. Suppress the default
1528 values for $authenticated_id and $authenticated_sender (but permit -oMai
1529 and -oMas) when testing with -bh.
1531 PH/24 Re-jigged the order of the tests in the default configuration so that the
1532 tests for valid domains and recipients precede the DNS black list and CSA
1533 tests, on the grounds that those ones are more expensive.
1535 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1536 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1537 This bug exists in every version of Exim that I still have, right back to
1540 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1541 However, an attempt to turn on case-sensitivity in a regex key by
1542 including (?-i) didn't work because the subject string was already
1543 lowercased, and the effects were non-intuitive. It turns out that a
1544 one-line patch can be used to allow (?-i) to work as expected.
1550 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1551 other effects) broke the use of negated acl sub-conditions.
1553 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1556 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1557 "Deny" causes Exim to reject the incoming connection with a 554 error.
1558 Unfortunately, if there is a major crisis, such as a disk failure,
1559 tcp-wrappers gives "deny", whereas what one would like would be some
1560 kind of temporary error. A kludge has been added to help with this.
1561 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1562 554 error is used if errno is still zero or contains ENOENT (which occurs
1563 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1566 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1568 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1569 errors. Otherwise a message that provokes a temporary error (when other
1570 messages do not) can cause a whole host to time out.
1572 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1573 addresses were routed directly to files or pipes from a redirect router.
1574 File deliveries just didn't batch; pipe deliveries might have suffered
1577 PH/06 A failure to get a lock for a hints database would erroneously always say
1578 "Failed to get write lock", even when it was really a read lock.
1580 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1581 of 0600. This has been changed to use the value of the lockfile_mode
1582 option (which defaults to 0600).
1584 PH/08 Applied small patch from the Sieve maintainer.
1586 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1587 folder from quota calculations, a direct delivery into this folder messed
1588 up the contents of the maildirsize file. This was because the regex was
1589 used only to exclude .Trash (or whatever) when the size of the mailbox
1590 was calculated. There was no check that a delivery was happening into an
1591 excluded directory. This bug has been fixed by ignoring all quota
1592 processing for deliveries into excluded directories.
1594 PH/10 Added the maildirfolder_create_regex option to appendfile.
1600 PH/01 The code for finding all the local interface addresses on a FreeBSD
1601 system running IPv6 was broken. This may well have applied to all BSD
1602 systems, as well as to others that have similar system calls. The broken
1603 code found IPv4 interfaces correctly, but gave incorrect values for the
1604 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1605 that it would not match correctly against @[] and not recognize the IPv6
1608 PH/02 The ipliteral router was not recognizing addresses of the form user@
1609 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1611 PH/03 Added disable_ipv6.
1613 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1614 decoded form, because it is most often used to construct To: headers
1615 lines in autoreplies, and the decoded form may well be syntactically
1616 invalid. However, $reply_address has leading white space removed, and all
1617 newlines turned into spaces so that the autoreply transport does not
1620 PH/05 If group was specified without a user on a router, and no group or user
1621 was specified on a transport, the group from the router was ignored.
1623 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1624 for visible compile-time settings that can be used to change these
1625 numbers, for those that want even more. Backwards compatibility with old
1626 spool files has been maintained. However, going back to a previous Exim
1627 release will lost any variables that are in spool files.
1629 PH/07 Two small changes when running in the test harness: increase delay when
1630 passing a TCP/IP connection to a new process, in case the original
1631 process has to generate a bounce, and remove special handling of
1632 127.0.0.2 (sic), which is no longer necessary.
1634 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1635 be the same on different OS.
1637 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1640 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1641 whether --show-vars was specified or not
1643 JJ/02 exipick: Added support for new ACL variable spool format introduced
1646 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1647 syntactically invalid From: or Reply-to: line, and a filter used this to
1648 generate an autoreply, and therefore failed to obtain an address for the
1649 autoreply, Exim could try to deliver to a non-existent relative file
1650 name, causing unrelated and misleading errors. What now happens is that
1651 it logs this as a hard delivery error, but does not attempt to create a
1654 PH/11 The exinext utility has a -C option for testing purposes, but although
1655 the given file was scanned by exinext itself; it wasn't being passed on
1656 when Exim was called.
1658 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1659 an end-of-file indication when reading a command response.
1661 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1662 compiled. In many other places in Exim, IPv6 addresses are always
1663 recognized, so I have changed this. It also means that IPv4 domain
1664 literals of the form [IPV4:n.n.n.n] are now always recognized.
1666 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1667 used if the router is not running as root, for example, when verifying at
1668 ACL time, or when using -bh. The debugging output from this situation was
1669 non-existent - all you got was a failure to exec. I have made two
1672 (a) Failures to set uid/gid, the current directory, or a process leader
1673 in a subprocess such as that created by queryprogram now generate
1674 suitable debugging ouput when -d is set.
1676 (b) The queryprogram router detects when it is not running as root,
1677 outputs suitable debugging information if -d is set, and then runs
1678 the subprocess without attempting to change uid/gid.
1680 PH/15 Minor change to Makefile for building test_host (undocumented testing
1683 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1684 additional section of a DNS packet that returns MX or SRV records.
1685 Instead, it always explicitly searches for A/AAAA records. This avoids
1686 major problems that occur when a DNS server includes only records of one
1687 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1688 fixed another bug: if SRV records were looked up and the corresponding
1689 address records were *not* found in the additional section, the port
1690 values from the SRV records were lost.
1692 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1693 using the correct key (the original address) when searching the retry
1694 rules in order to find which one to use for generating the retry hint.
1696 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1697 adding the default one. Similarly, if it contains a Reply-To: header, the
1698 errors_reply_to option, if set, is not used.
1700 PH/19 When calculating a retry time, Exim used to measure the "time since
1701 failure" by looking at the "first failed" field in the retry record. Now
1702 it does not use this if it is later than than the arrival time of the
1703 message. Instead it uses the arrival time. This makes for better
1704 behaviour in cases where some deliveries succeed, thus re-setting the
1705 "first failed" field. An example is a quota failure for a huge message
1706 when small messages continue to be delivered. Without this change, the
1707 "time since failure" will always be short, possible causing more frequent
1708 delivery attempts for the huge message than are intended.
1709 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1711 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1712 $1, $2, $3) because the numerical variables can be reset during some
1713 expansion items (e.g. "match"), thereby losing the authentication data.
1715 PH/21 Make -bV show the size of off_t variables so that the test suite can
1716 decide whether to run tests for quotas > 2G.
1718 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1719 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1720 filecount value is greater than 2G or if a quota value is greater than 2G
1721 on a system where the size of off_t is not greater than 4, a panic error
1724 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1725 never match. The debug and -bh output now contains an explicit error
1726 message indicating a malformed IPv4 address or mask.
1728 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1729 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1730 PH/23 above applies.
1732 PH/25 Do not write to syslog when running in the test harness. The only
1733 occasion when this arises is a failure to open the main or panic logs
1734 (for which there is an explicit test).
1736 PH/26 Added the /no_tell option to "control=freeze".
1738 PH/27 If a host name lookup failed very early in a connection, for example, if
1739 the IP address matched host_lookup and the reverse lookup yielded a name
1740 that did not have a forward lookup, an error message of the form "no IP
1741 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1742 could be logged. Now it outputs the IP address instead of "NULL".
1744 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1745 allows the sender and the authenticated sender to be set when
1746 submitting a message from within Exim. Since child_open_exim() is
1747 documented for local_scan(), the new function should be too.
1749 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1750 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1751 results in an empty string is now treated as unset.
1753 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1755 PH/31 Added sender_verify_fail logging option.
1757 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1758 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1759 tidied the source and removed it altogether.
1761 PH/33 When a queue run was abandoned because the load average was too high, a
1762 log line was always written; now it is written only if the queue_run log
1763 selector is set. In addition, the log line for abandonment now contains
1764 information about the queue run such as the pid. This is always present
1765 in "start" and "stop" lines but was omitted from the "abandon" line.
1767 PH/34 Omit spaces between a header name and the colon in the error message that
1768 is given when verify = headers_syntax fails (if there are lots of them,
1769 the message gets confusing).
1771 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1772 names, as there are now some PTR records that contain slashes. This check
1773 is only to protect against broken name servers that fall over on strange
1774 characters, so the fact that it applies to all lookups doesn't matter.
1776 PH/36 Now that the new test suite is complete, we can remove some of the
1777 special code in Exim that was needed for the old test suite. For example,
1778 sorting DNS records because real resolvers return them in an arbitrary
1779 order. The new test suite's fake resolver always returns records in the
1782 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1783 bounces) except when queue_only is set, to avoid logging races between
1784 the different processes.
1786 PH/38 Panic-die if .include specifies a non-absolute path.
1788 PH/39 A tweak to the "H" retry rule from its user.
1790 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1791 a label. They prevented compilation on older perls.
1793 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1794 a warning to be raised on newish perls.
1796 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1797 on queue. Changes to match documented behaviour of showing count of
1798 messages matching specified criteria.
1800 PH/40 Changed the default ident timeout from 30s to 5s.
1802 PH/41 Added support for the use of login_cap features, on those BSD systems
1803 that have them, for controlling the resources used by pipe deliveries.
1805 PH/42 The content-scanning code uses fopen() to create files in which to put
1806 message data. Previously it was not paying any attention to the mode of
1807 the files. Exim runs with umask(0) because the rest of the code creates
1808 files with open(), and sets the required mode explicitly. Thus, these
1809 files were ending up world-writeable. This was not a big issue, because,
1810 being within the spool directory, they were not world-accessible. I have
1811 created a function called modefopen, which takes an additional mode
1812 argument. It sets umask(777), creates the file, chmods it to the required
1813 mode, then resets the umask. All the relevant calls to fopen() in the
1814 content scanning code have been changed to use this function.
1816 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1817 to 24 hours. This avoids potential overflow problems when processing G
1818 and H retry rules. I suspect nobody ever tinkers with this value.
1820 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1822 PH/45 When the plaintext authenticator is running as a client, the server's
1823 challenges are checked to ensure they are valid base64 strings. By
1824 default, the authentication attempt is cancelled if an invalid string is
1825 received. Setting client_ignore_invalid_base64 true ignores these errors.
1826 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1827 they are received. Thus, the responses can be made to depend on the
1828 challenges. If an invalid string is ignored, an empty string is placed in
1831 PH/46 Messages that are created by the autoreply transport now contains a
1832 References: header, in accordance with RFCs 2822 and 3834.
1834 PH/47 Added authenticated_sender_force to the smtp transport.
1836 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1838 PH/49 Installed latest patch from the Sieve maintainer.
1840 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1841 was also set, the appendfile transport was unnecessarily scanning a
1842 directory of message files (e.g. for maildir delivery) to find the count
1843 of files (along with the size), even though it did not need this
1844 information. It now does the scan only if it needs to find either the
1845 size of the count of files.
1847 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1849 PH/52 Two bugs concerned with error handling when the smtp transport is
1852 (i) Exim was not creating retry information for temporary errors given
1853 for individual recipients after the DATA command when the smtp transport
1854 was used in LMTP mode. This meant that they could be retried too
1855 frequently, and not timed out correctly.
1857 (ii) Exim was setting the flag that allows error details to be returned
1858 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1859 recipients that were returned after the DATA command.
1861 PH/53 This is related to PH/52, but is more general: for any failing address,
1862 when detailed error information was permitted to be returned to the
1863 sender, but the error was temporary, then after the final timeout, only
1864 "retry timeout exceeded" was returned. Now it returns the full error as
1865 well as "retry timeout exceeded".
1867 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1868 do this, and (what is worse) MTAs that accept it.
1870 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1871 will now be deprecated.
1873 PH/56 New os.c-cygwin from the Cygwin maintainer.
1875 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1876 formats (previously only available in exim formats via -bpr, -bpru,
1877 and -bpra. Now also available in native and exiqgrep formats)
1879 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1880 with very large, slow to parse queues
1882 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1884 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1886 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1887 responses to authentication challenges, though it was showing the
1888 challenges; (ii) I've removed the CR characters from the debug output for
1891 PH/58 Allow for the insertion of a newline as well as a space when a string
1892 is turned into more than one encoded-word during RFC 2047 encoding. The
1893 Sieve code now uses this.
1895 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1896 data_4xx, lost_connection, tls_required.
1898 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1899 message was being sent as an SMTP response.
1901 PH/61 Add -l and -k options to exicyclog.
1903 PH/62 When verifying, if an address was redirected to one new address, so that
1904 verification continued, and the new address failed or deferred after
1905 having set something in $address_data, the value of $address_data was not
1906 passed back to the ACL. This was different to the case when no
1907 redirection occurred. The value is now passed back in both cases.
1909 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1910 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1911 use login_cap.h, so on its own it isn't the distinguishing feature. The
1912 new name refers directly to the setclassresources() function.
1914 PH/65 Added configuration files for NetBSD3.
1916 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1918 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1919 is preferred over IPv4.
1921 PH/68 The bounce_return_message and bounce_return_body options were not being
1922 honoured for bounces generated during the reception of non-SMTP messages.
1923 In particular, this applied to messages rejected by the ACL. This bug has
1924 been fixed. However, if bounce_return_message is true and bounce_return_
1925 body is false, the headers that are returned for a non-SMTP message
1926 include only those that have been read before the error was detected.
1927 (In the case of an ACL rejection, they have all been read.)
1929 PH/69 The HTML version of the specification is now built in a directory called
1930 spec_html instead of spec.html, because the latter looks like a path with
1931 a MIME-type, and this confuses some software.
1933 PH/70 Catch two compiler warnings in sieve.c.
1935 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1936 function verify_get_ident() calls ip_connect() to connect a socket, but
1937 if the "connect()" function timed out, ip_connect() used to close the
1938 socket. However, verify_get_ident() also closes the socket later, and in
1939 between Exim writes to the log, which may get opened at this point. When
1940 the socket was closed in ip_connect(), the log could get the same file
1941 descriptor number as the socket. This naturally causes chaos. The fix is
1942 not to close the socket in ip_connect(); the socket should be closed by
1943 the function that creates it. There was only one place in the code where
1944 this was missing, in the iplookup router, which I don't think anybody now
1945 uses, but I've fixed it anyway.
1947 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1948 well as to direct DNS lookups. Otherwise the handling of names in host
1949 lists is inconsistent and therefore confusing.
1955 PH/01 Two changes to the default runtime configuration:
1957 (1) Move the checks for relay_from_hosts and authenticated clients from
1958 after to before the (commented out) DNS black list checks.
1960 (2) Add control=submission to the relay_from_hosts and authenticated
1961 clients checks, on the grounds that messages accepted by these
1962 statements are most likely to be submissions.
1964 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1966 (1) Generate an error if the third argument for the ${prvs expansion is
1969 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1972 (3) Reset the variables that are obtained from the first argument of
1973 ${prvscheck and used in the second argument before leaving the code,
1974 because their memory is reclaimed, so using them afterwards may do
1977 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1978 one (it's much easier than Tom thought :-).
1980 (5) Because of (4), we can now allow for the use of $prvscheck_result
1981 inside the third argument.
1983 PH/03 For some reason, the default setting of PATH when running a command from
1984 a pipe transport was just "/usr/bin". I have changed it to
1987 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1988 anything to be listed in the output from -bV.
1990 PH/05 When a filter generated an autoreply, the entire To: header line was
1991 quoted in the delivery log line, like this:
1993 => >A.N.Other <ano@some.domain> <original@ddress> ...
1995 This has been changed so that it extracts the operative address. There
1996 may be more than one such address. If so, they are comma-separated, like
1999 => >ano@some.domain,ona@other.domain <original@ddress> ...
2001 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2002 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2003 not being looked up in the rDNS to get a host name, Exim was showing the
2004 IP address twice in Received: lines, even though the IP addresses were
2005 identical. For example:
2007 Received: from [1.2.3.4] (helo=[1.2.3.4])
2009 However, if the real host name was known, it was omitting the HELO data
2010 if it matched the actual IP address. This has been tidied up so that it
2011 doesn't show the same IP address twice.
2013 PH/07 When both +timestamp and +memory debugging was on, the value given by
2014 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2015 called by the debug printing, thereby overwriting the timestamp buffer.
2016 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2018 PH/08 When the original message was included in an autoreply transport, it
2019 always said "this is a copy of the message, including all the headers",
2020 even if body_only or headers_only was set. It now gives an appropriate
2023 PH/09 Applied a patch from the Sieve maintainer which:
2025 o fixes some comments
2026 o adds the (disabled) notify extension core
2027 o adds some debug output for the result of if/elsif tests
2028 o points to the current vacation draft in the documentation
2029 and documents the missing references header update
2033 o fixes a bug in processing the envelope test (when testing
2034 multiple envelope elements, the last element determinted the
2037 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2038 Electronic Mail") by including:
2040 Auto-submitted: auto-generated
2042 in the messages that it generates (bounce messages and others, such as
2043 warnings). In the case of bounce messages for non-SMTP mesages, there was
2044 also a typo: it was using "Auto_submitted" (underscore instead of
2045 hyphen). Since every message generated by Exim is necessarily in response
2046 to another message, thes have all been changed to:
2048 Auto-Submitted: auto-replied
2050 in accordance with these statements in the RFC:
2052 The auto-replied keyword:
2054 - SHOULD be used on messages sent in direct response to another
2055 message by an automatic process,
2057 - MUST NOT be used on manually-generated messages,
2059 - MAY be used on Delivery Status Notifications (DSNs) and Message
2060 Disposition Notifications (MDNs),
2062 - MUST NOT be used on messages generated by automatic or periodic
2063 processes, except for messages which are automatic responses to
2066 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2067 to the default Received: header definition.
2069 PH/12 Added log selector acl_warn_skipped (default on).
2071 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2072 variables because (a) they are in the wrong storage pool and (b) even if
2073 they were copied, it wouldn't work properly because of the caching.
2075 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2076 checking when decoding. Apparently there are clients that generate
2077 overlong encoded strings. Why am I not surprised?
2079 PH/15 If the first argument of "${if match_address" was not empty, but did not
2080 contain an "@" character, Exim crashed. Now it writes a panic log message
2081 and treats the condition as false.
2083 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2085 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2086 extension "envelope-auth". The code is finished and in agreement with
2087 other implementations, but there is no documentation so far and in fact,
2088 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2089 not changing the active code.
2091 Print executed "if" and "elsif" statements when debugging is used. This
2092 helps a great deal to understand what a filter does.
2094 Document more things not specified clearly in RFC3028. I had all this
2095 sorted out, when out of a sudden new issues came to my mind. Oops."
2097 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2100 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2101 canonical form (as documented). However, after a host name lookup from
2102 the IP address, check_host() was doing a simple string comparison with
2103 addresses acquired from the DNS when checking that the found name did
2104 have the original IP as one of its addresses. Since any found IPv6
2105 addresses are likely to be in abbreviated form, the comparison could
2106 fail. Luckily, there already exists a function for doing the comparison
2107 by converting both addresses to binary, so now that is used instead of
2108 the text comparison.
2110 PH/20 There was another similar case to PH/19, when a complete host name was
2111 given in a host list; looking up its IP address could give an abbreviated
2112 form, whereas the current host's name might or might not be abbreviated.
2113 The same fix has been applied.
2119 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2120 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2123 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2124 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2126 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2128 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2129 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2130 Also, for "Auto-Submitted", treat anything other than "no" as
2131 non-personal, in accordance with RFC 3834. (Previously it treated
2132 anything starting "auto-" as non-personal.)
2134 TF/01 The control=submission/name=... option had a problem with syntax
2135 errors if the name included a slash character. The /name= option
2136 now slurps the rest of the string, so it can include any characters
2137 but it must come last in the list of options (after /sender_retain
2140 PH/05 Some modifications to the interface to the fake nameserver for the new
2148 TK/01 Added the "success_on_redirect" address verification option. See
2149 NewStuff for rationale and an example.
2151 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2153 PH/02 Patch to exigrep to allow it to work on syslog lines.
2155 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2156 fread() to skip over the body file's header line, because in Cygwin the
2157 header line is locked and is inaccessible.
2159 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2160 co-exist for some time) to make it clear that it is the Exim ID that is
2161 referenced, not the Message-ID: header line.
2163 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2164 string_format() function, because snprintf() does not exist on all
2167 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2168 ${stat: expansion item.
2170 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2171 protocol synchronization error", to keep the pedants happy.
2173 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2174 well as for IRIX systems, when gcc is being used. See the host.c source
2177 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2179 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2182 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2183 transport and to the smtp transport in LMTP mode.
2185 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2187 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2188 run a filter in a subprocess. This could lead to confusion in subsequent
2189 lookups in the parent process. There should also be a search_tidyup() at
2190 the end of the subprocess.
2192 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2193 only if the host matched helo_try_verify_hosts, which caused the
2194 verification to occur when the EHLO/HELO command was issued. The ACL just
2195 tested the remembered result. Now, if a previous verification attempt has
2196 not happened, "verify = helo" does it there and then.
2198 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2200 TK/03 Fix log output including CR from clamd.
2202 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2203 exist provoked a memory error which could cause a segfault.
2205 PH/15 Installed PCRE 6.2
2207 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2209 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2210 of the problem. Specifically, suggested +O2 rather than +O1 for the
2213 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2215 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2216 record, the port was not correctly logged when the outgoing_port log
2217 selector was set (it logged the transort's default port).
2219 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2220 fallback_hosts, and "hosts" in the smtp transport.
2222 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2223 host errors such as "Connection refused".
2225 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2226 authentication with radiusclient 0.4.9:
2228 - Error returned from rc_read_config was caught wrongly
2229 - Username/password not passed on to radius server due to wrong length.
2231 The presumption is that some radiusclient API changes for 4.51/PH/17
2232 were not taken care of correctly. The code is still untested by me (my
2233 Linux distribution still has 0.3.2 of radiusclient), but it was
2234 contributed by a Radius user.
2236 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2237 expanding the "port" option of the smtp transport.
2239 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2240 while reading a MIME header. Thanks to Tom Hughes for a patch.
2242 PH/24 Include config.h inside local_scan.h so that configuration settings are
2245 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2246 that in an ACL for RCPT (for example), you can examine exactly what was
2249 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2250 commands, but it was not correctly comparing the address with the actual
2251 client host address. Thus, it would show the EHLO address in Received:
2252 header lines when this was not necessary.
2254 PH/27 Added the % operator to ${eval:}.
2256 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2257 it should be ignoring failures (because with -C, for example, it has lost
2258 privilege). It wasn't ignoring creation failures other than "already
2261 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2264 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2265 because an input line was too long, either on its own, or by virtue of
2266 too many continuations, the temporary file was not being removed, and the
2267 return code was incorrect.
2269 PH/31 Missing "BOOL" in function definition in filtertest.c.
2271 PH/32 Applied Sieve patches from the maintainer.
2273 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2275 PH/33 Added "verify = not_blind".
2277 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2278 Local/Makefile (with some defaults set). These are used in built scripts
2279 such as exicyclog, but they have never been used in the exim_install
2280 script (though there are many overriding facilities there). I have
2281 arranged that the exim_install script now takes note of these two
2284 PH/35 Installed configuration files for Dragonfly.
2286 PH/36 When a locally submitted message by a trusted user did not contain a
2287 From: header, and the sender address was obtained from -f or from an SMTP
2288 MAIL command, and the trusted user did not use -F to supply a sender
2289 name, $originator_name was incorrectly used when constructing a From:
2290 header. Furthermore, $originator_name was used for submission mode
2291 messages from external hosts without From: headers in a similar way,
2292 which is clearly wrong.
2294 PH/37 Added control=suppress_local_fixups.
2296 PH/38 When log_selector = +received_sender was set, and the addition of the
2297 sender made the log line's construction buffer exactly full, or one byte
2298 less than full, an overflow happened when the terminating "\n" was
2301 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2302 when the result of a list match is failure because a DNS lookup failed.
2304 PH/40 RM_COMMAND is now used in the building process.
2306 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2307 the "build-* directories that it finds.
2309 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2310 address in a domain literal was a prefix of an interface address.
2312 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2313 when verifying a sender address, unless rewrite_headers is false.
2315 PH/44 Wrote a long comment about why errors_to addresses are verified as
2316 recipients, not senders.
2318 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2319 the ratelimit ACL was added.
2321 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2323 PH/46 Added extra information about PostgreSQL errors to the error string.
2325 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2326 avoiding the need to install special zones in a real server. This is
2327 backwards compatible; if it can't find the fake resolver, it drops back.
2328 Thus, both old and new test suites can be run.
2330 TF/02 Added util/ratelimit.pl
2332 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2333 clock is set back in time.
2335 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2336 Candler <B.Candler@pobox.com>.
2338 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2339 OK for addresses that are the result of redirections.
2341 PH/48 A number of further additions for the benefit of the new test suite,
2342 including a fake gethostbyname() that interfaces to the fake DNS resolver
2345 TF/06 The fix for widen_domains has also been applied to qualify_single and
2346 search_parents which are the other dnslookup options that can cause
2349 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2352 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2354 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2355 service" if it encountered an MX record with an empty target hostname.
2356 The message is now "an MX or SRV record indicated no SMTP service".
2358 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2359 if the DNS of the sending site is misconfigured. This is quite a
2360 common situation. This change restores the behaviour of treating a
2361 helo verification defer as a failure.
2363 PH/51 If self=fail was set on a router, the bounce message did not include the
2364 actual error message.
2370 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2372 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2373 command itself ended in error, the underlying message about the transport
2374 filter timeout was being overwritten with the pipe command error. Now the
2375 underlying error message should be appended to the second error message.
2377 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2379 PH/02 Reduce the amount of output that "make" produces by default. Full output
2380 can still be requested.
2382 PH/03 The warning log line about a condition test deferring for a "warn" verb
2383 was being output only once per connection, rather than after each
2384 occurrence (because it was using the same function as for successful
2385 "warn" verbs). This seems wrong, so I have changed it.
2387 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2388 it should not have, which might have caused a crash in the right
2389 circumstances, but probably never did.
2391 PH/04 Installed a modified version of Tony Finch's patch to make submission
2392 mode fix the return path as well as the Sender: header line, and to
2393 add a /name= option so that you can make the user's friendly name appear
2396 TF/03 Added the control = fakedefer ACL modifier.
2398 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2399 Mark Lowes for thorough testing.
2401 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2403 TK/03 Merged latest SRS patch from Miles Wilton.
2405 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2406 with the definition in sysexits.h (which is #included earlier).
2407 Fortunately, Exim does not actually use EX_OK. The code used to try to
2408 preserve the sysexits.h value, by assumimg that macro definitions were
2409 scanned for macro replacements. I have been disabused of this notion,
2410 so now the code just undefines EX_OK before #including unistd.h.
2412 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2413 in the smtp transport. When a block could not be written in a single
2414 write() function, the timeout was being re-applied to each part-write.
2415 This seems wrong - if the receiver was accepting one byte at a time it
2416 would take for ever. The timeout is now adjusted when this happens. It
2417 doesn't have to be particularly precise.
2419 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2420 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2422 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2423 without a domain if the check to <postmaster@domain> fails.
2425 SC/01 Eximstats: added -xls and the ability to specify output files
2426 (patch written by Frank Heydlauf).
2428 SC/02 Eximstats: use FileHandles for outputing results.
2430 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2432 SC/04 Eximstats: fixed display of large numbers with -nvr option
2434 SC/05 Eximstats: fixed merging of reports with empty tables.
2436 SC/06 Eximstats: added the -include_original_destination flag
2438 SC/07 Eximstats: removed tabs and trailing whitespace.
2440 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2442 TK/06 MBOX spool code: Add real "From " MBOX separator line
2443 so the .eml file is really in mbox format (even though
2444 most programs do not really care). Patch from Alex Miller.
2446 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2447 The latter is generated from $received_to and is only set if the
2448 message has one envelope recipient. SA can use these headers,
2449 obviously out-of-the-box. Patch from Alex Miller.
2451 PH/08 The ${def test on a variable was returning false if the variable's
2452 value was "0", contrary to what the specification has always said!
2453 The result should be true unless the variable is empty.
2455 PH/09 The syntax error of a character other than { following "${if
2456 def:variable_name" (after optional whitespace) was not being diagnosed.
2457 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2458 accidental colon was present, for example, could give incorrect results.
2460 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2461 result is used (not including appendfile, where other changes are about
2464 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2465 This involved changing a lot of size variables from int to off_t. It
2466 should work with maildirs and everything.
2468 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2469 spamd dying while we are connected to it.
2471 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2474 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2475 function for BDB 4.3.
2477 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2479 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2480 the sources for PCRE have been re-arranged and more files are now
2483 PH/15 The code I had for printing potentially long long variables in PH/11
2484 above was not the best (it lost precision). The length of off_t variables
2485 is now inspected at build time, and an appropriate printing format (%ld
2486 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2487 to be "long long int" or "long int". This is needed for the internal
2488 formatting function string_vformat().
2490 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2491 the configuration file to be ":syslog", then the script "guesses" where
2492 the logs files are, rather than using the compiled in default. In our
2493 case the guess is not the same as the compiled default, so the script
2494 suddenly stopped working when I started to use syslog. The patch checks
2495 to see if log_file_path is "". If so, it attempts to read it from exim
2496 with no configuration file to get the compiled in version, before it
2497 falls back to the previous guessing code."
2499 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2500 implementing BATV in an Exim configuration. See NewStuff for the gory
2503 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2504 Makefile that are specific to HP-UX.
2506 PH/18 If the "use_postmaster" option was set for a recipient callout together
2507 with the "random" option, the postmaster address was used as the MAIL
2508 FROM address for the random test, but not for the subsequent recipient
2509 test. It is now used for both.
2511 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2512 patch removes a few documentation additions to RFC 3028, because the
2513 latest draft now contains them. It adds the new en;ascii-case comparator
2514 and a new error check for 8bit text in MIME parts. Comparator and
2515 require names are now matched exactly. I enabled the subaddress
2516 extension, but it is not well tested yet (read: it works for me)."
2518 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2519 rework some of the code of TK/09 above to avoid the hardwired use of
2520 "%lld" and "long long". Replaced the call to snprintf() with a call to
2523 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2524 records point to non-existent hosts", "retry timeout exceeded", and
2525 "retry time not reached for any host after a long failure period".
2527 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2528 experimental DomainKeys support:
2530 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2531 (2) On an error such as an illegally used "control", the wrong name for
2532 the control was given.
2534 These problems did NOT occur unless DomainKeys support was compiled.
2536 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2538 PH/24 Added ${if match_ip condition.
2540 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2541 databases so that it will be absolutely obvious if a crash occurs in the
2542 DB library. This is a regular occurrence (often caused by mis-matched
2545 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2546 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2547 picked up on a user's system that detects such things. There doesn't seem
2548 to be a gcc warning option for this - only an attribute that has to be
2549 put on the function's prototype. It seems that in Fedora Core 4 they have
2550 set this on a number of new functions. No doubt there will be more in due
2553 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2554 specify a transport. However, if an address that was verified by such a
2555 router was the subject of a callout, Exim crashed because it tried to
2556 read the rcpt_include_affixes from the non-existent transport. Now it
2557 just assumes that the setting of that option is false. This bug was
2558 introduced by 4.51/PH/31.
2560 PH/28 Changed -d+all to exclude +memory, because that information is very
2561 rarely of interest, but it makes the output a lot bigger. People tend to
2562 do -d+all out of habit.
2564 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2565 code in os-type was giving problems when libc.so lives in lib64, like on
2568 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2569 aren't the modern standard, and it seems that some systems' include files
2570 don't always have them. Exim was already checking for some of the newer
2571 ones like T_AAAA, and defining it itself. I've added checks for all the
2572 record types that Exim uses.
2574 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2575 not automatically generating a new one, as it is supposed to. This
2576 prevented TLS from working. If the file did exist, but contained invalid
2577 data, a new version was generated, as expected. It was only the case of a
2578 non-existent file that was broken.
2580 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2581 with a change in libdomainkeys > 0.64.
2583 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2584 from DNS. If the selector record carries the flag, it now has
2585 precedence over the domain-wide flag.
2587 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2589 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2590 the use of a port name that isn't defined in /etc/services) occurred, the
2591 message was deferred as in a normal delivery, and thus remained on the
2592 spool, instead of being failed because of the mua_wrapper setting. This
2593 is now fixed, and I tidied up some of the mua_wrapper messages at the
2596 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2597 the messages in a hash of arrays rather than using individual hashes.
2598 This is a bit cleaner and results in dramatic memory savings, albeit
2599 at a slight CPU cost.
2601 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2602 as requested by Marc Sherman.
2604 SC/10 Eximstats: added histograms for user specified patterns as requested
2607 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2609 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2610 fopen() in the content-scanning modules that did not already have it.
2616 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2617 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2619 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2621 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2623 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2624 to test Sieve filters that use "vacation".
2626 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2627 that changes the way the GnuTLS parameters are stored in the cache file.
2628 The new format can be generated externally. For backward compatibility,
2629 if the data in the cache doesn't make sense, Exim assumes it has read an
2630 old-format file, and it generates new data and writes a new file. This
2631 means that you can't go back to an older release without removing the
2634 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2635 work if there are any delivery delays because "one_time" forces the
2636 parent to be marked "delivered", so its unseen clone is never tried
2637 again. For this reason, Exim now forbids the simultaneous setting of
2640 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2641 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2642 entry if you want to know the details. The fix, however, neglected to
2643 consider the case when local delivery batching is involved. The test for
2644 "previously delivered" was not happening when checking to see if an
2645 address could be batched with a previous (undelivered) one; under
2646 certain circumstances this could lead to multiple deliveries to the same
2649 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2650 in its include files, and this causes problems building Exim.
2652 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2653 header_syntax) but Exim was just ignoring anything given after a slash.
2654 In particular, this caused confusion with an attempt to use "verify =
2655 reverse_host_lookup/defer_ok". An error is now given when options are
2656 supplied for verify items that do not have them. (Maybe reverse_host_
2657 lookup should have a defer_ok option, but that's a different point.)
2659 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2660 defined by RFC 821) to 2048, because there were problems with some AUTH
2661 commands, and RFC 1869 says the size should be increased for extended
2662 SMTP commands that take arguments.
2664 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2667 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2668 "unknown" error; now it says that the functionality isn't in the binary.
2670 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2671 an address' error message when a string expansion fails (syntax or
2672 whatever). Otherwise the password may appear in the log. Following change
2673 PH/42 below, there is no longer a chance of it appearing in a bounce
2676 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2678 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2679 of its addresses was ever tried. (Bugzilla bug #2.)
2681 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2682 the result incorrectly in the debug output. (It correctly added a newline
2683 to what was transported.)
2685 TF/01 Added $received_time.
2687 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2688 commented out examples of how to interface to a virus scanner and to
2689 SpamAssassin. Also added commented examples of av_scanner and
2690 spamd_address settings.
2692 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2693 and controls are allowed in which ACLs. There were a couple of minor
2694 errors. Some of the entries in the conditions table (which is a table of
2695 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2696 negation of where the condition IS allowed.
2698 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2700 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2701 header file does not have a version number, so I've had to invent a new
2702 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2703 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2704 radiusclient), but it was contributed by a Radius user.
2706 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2707 files or directories, for OpenSSL.
2709 PH/19 When an Exim process that is running as root has to create an Exim log
2710 file, it does so in a subprocess that runs as exim:exim so as to get the
2711 ownership right at creation (otherwise, other Exim processes might see
2712 the file with the wrong ownership). There was no test for failure of this
2713 fork() call, which would lead to the process getting stuck as it waited
2714 for a non-existent subprocess. Forks do occasionally fail when resources
2715 run out. I reviewed all the other calls to fork(); they all seem to check
2718 PH/20 When checking for unexpected SMTP input at connect time (before writing
2719 the banner), Exim was not dealing correctly with a non-positive return
2720 from the read() function. If the client had disconnected by this time,
2721 the result was a log entry for a synchronization error with an empty
2722 string after "input=" when read() returned zero. If read() returned -1
2723 (an event I could not check), uninitialized data bytes were printed.
2724 There were reports of junk text (parts of files, etc) appearing after
2727 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2729 PH/22 Added support for macro redefinition, and (re)definition in between
2730 driver and ACL definitions.
2732 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2733 forgetting to use the resulting value; it was using the unexpanded value.
2735 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2736 hadn't been configured. The fix is from Juergen Kreileder, who
2737 understands it better than I do:
2739 "Here's what I see happening with three configured cyrus_sasl
2740 authenticators configured (plain, login, cram-md5):
2742 On startup auth_cyrus_sasl_init() gets called for each of these.
2743 This means three calls to sasl_listmech() without a specified mech_list.
2744 => SASL tests which mechs of all available mechs actually work
2745 => three warnings about OTP not working
2746 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2748 With the patch, sasl_listmech() also gets called three times. But now
2749 SASL's mech_list option is set to the server_mech specified in the the
2750 authenticator. Or in other words, the answer from sasl_listmech()
2751 gets limited to just the mech you're testing for (which is different
2753 => the return list contains just 'plain' or 'login', 'cram-md5' or
2754 nothing depending on the value of ob->server_mech.
2756 I've just tested the patch: Authentication still works fine,
2757 unavailable mechs specified in the exim configuration are still
2758 caught, and the auth.log warnings about OTP are gone."
2760 PH/25 When debugging is enabled, the contents of the command line are added
2761 to the debugging output, even when log_selector=+arguments is not
2764 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2765 answer is "GNU", and only if the return is "GNU/something" is the answer
2768 PH/27 $acl_verify_message is now set immediately after the failure of a
2769 verification in an ACL, and so is available in subsequent modifiers. In
2770 particular, the message can be preserved by coding like this:
2772 warn !verify = sender
2773 set acl_m0 = $acl_verify_message
2775 Previously, $acl_verify_message was set only while expanding "message"
2776 and "log_message" when a very denied access.
2778 PH/28 Modified OS/os.c-Linux with
2780 -#ifndef OS_LOAD_AVERAGE
2781 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2783 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2784 nomenclature these days.)
2786 PH/29 Installed patch from the Sieve maintainer that adds the options
2787 sieve_useraddress and sieve_subaddress to the redirect router.
2789 PH/30 In these circumstances:
2790 . Two addresses routed to the same list of hosts;
2791 . First host does not offer TLS;
2792 . First host accepts first address;
2793 . First host gives temporary error to second address;
2794 . Second host offers TLS and a TLS session is established;
2795 . Second host accepts second address.
2796 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2797 and peerdn, if requested) that were in fact used only for the second
2800 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2801 attention to any local part prefix or suffix that was matched by the
2802 router that accepted the address. It now behaves in the same way as it
2803 does for delivery: the affixes are removed from the local part unless
2804 rcpt_include_affixes is set on the transport.
2806 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2807 timeout during the DATA phase of an incoming message.
2809 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2810 applied a patch sanctioned by the Sieve maintainer.
2812 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2813 the uid or gid is negative. A case of a negative gid caused this to be
2814 noticed. The fix allows for either to be negative.
2816 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2817 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2820 PH/36 The change PH/12 above was broken. Fixed it.
2822 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2823 the grounds that routing the same address twice would always produce the
2824 same answer. This might have been true once, but it is certainly no
2825 longer true now. Routing a child address may depend on the previous
2826 routing that produced that child. Some complicated redirection strategies
2827 went wrong when messages had multiple recipients, and made Exim's
2828 behaviour dependent on the order in which the addresses were given.
2830 I have moved the duplicate checking until after the routing is complete.
2831 Exim scans the addresses that are assigned to local and remote
2832 transports, and removes any duplicates. This means that more work will be
2833 done, as duplicates will always all be routed, but duplicates are
2834 presumably rare, so I don't expect this is of any significance.
2836 For deliveries to pipes, files, and autoreplies, the duplicate checking
2837 still happens during the routing process, since they are not going to be
2840 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2841 It corrects a timeout issue with spamd. This is Ian's comment: "The
2842 background is that sometimes spamd either never reads data from a
2843 connection it has accepted, or it never writes response data. The exiscan
2844 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2845 blindly assumes that writes won't block so it may never time out."
2847 PH/39 Allow G after quota size as well as K and M.
2849 PH/40 The value set for $authenticated_id in an authenticator may not contain
2850 binary zeroes or newlines because the value is written to log lines and
2851 to spool files. There was no check on this. Now the value is run through
2852 the string_printing() function so that such characters are converted to
2853 printable escape sequences.
2855 PH/41 $message_linecount is a new variable that contains the total number of
2856 lines in the message. Compare $body_linecount, which is the count for the
2859 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2860 bounce and delay warning messages, except in certain special cases, which
2863 (a) An SMTP error message from a remote host;
2864 (b) A message specified in a :fail: redirection;
2865 (c) A message specified in a "fail" command in a system filter;
2866 (d) A message specified in a FAIL return from the queryprogram router;
2867 (e) A message specified by the cannot_route_message router option.
2869 In these cases only, Exim does include the error details in bounce and
2870 warning messages. There are also a few cases where bland messages such
2871 as "unrouteable address" or "local delivery error" are given.
2873 PH/43 $value is now also set for the "else" part of a ${run expansion.
2875 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2876 being worked on, but at least Exim now implements the latest version to
2879 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2880 process to complete was treated as a delivery failure, a timeout while
2881 writing the message to the pipe was logged, but erroneously treated as a
2882 successful delivery. Such timeouts include transport filter timeouts. For
2883 consistency with the overall process timeout, these timeouts are now
2884 treated as errors, giving rise to delivery failures by default. However,
2885 there is now a new Boolean option for the pipe transport called
2886 timeout_defer, which, if set TRUE, converts the failures into defers for
2887 both kinds of timeout. A transport filter timeout is now identified in
2890 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2891 systems where "make" and "gmake" are different, calling "gmake" at top
2892 level broke things. I've arranged for the value of $(MAKE) to be passed
2893 from the Makefile to this script so that it can call the same version of
2897 A note about Exim versions 4.44 and 4.50
2898 ----------------------------------------
2900 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2901 changes of various kinds. As a consequence, a big documentation update was
2902 needed. This delayed the release for rather longer than seemed good, especially
2903 in the light of a couple of (minor) security issues. Therefore, the changes
2904 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2905 release. So 4.44 and 4.50 are in effect two different branches that both start
2908 I have left the 4.50 change log unchanged; it contains all the changes since
2909 4.43. The change log for 4.44 is below; many of its items are identical to
2910 those for 4.50. This seems to be the most sensible way to preserve the
2911 historical information.
2917 1. Minor wording change to the doc/README.SIEVE file.
2919 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2920 computation of the current number of files was incorrect.
2922 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2923 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2926 4. Give more explanation in the error message when the command for a transport
2927 filter fails to execute.
2929 5. There are several places where Exim runs a non-Exim command in a
2930 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2931 was being done only for the command run by the queryprogram router. It is
2932 now done for all such subprocesses. The other cases are: ${run, transport
2933 filters, and the commands run by the lmtp and pipe transports.
2935 6. Added CONFIGURE_GROUP build-time option.
2937 7. Some older OS have a limit of 256 on the maximum number of file
2938 descriptors. Exim was using setrlimit() to set 1000 as a large value
2939 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2940 systems. I've change it so that if it can't get 1000, it tries for 256.
2942 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2943 was an oversight, and furthermore, ever since the addition of extra
2944 controls (e.g. 4.43/32), the checks on when to allow different forms of
2945 "control" were broken. There should now be diagnostics for all cases when a
2946 control that does not make sense is encountered.
2948 9. Added the /retain_sender option to "control=submission".
2950 10. $recipients is now available in the predata ACL (oversight).
2952 11. Tidy the search cache before the fork to do a delivery from a message
2953 received from the command line. Otherwise the child will trigger a lookup
2954 failure and thereby defer the delivery if it tries to use (for example) a
2955 cached ldap connection that the parent has called unbind on.
2957 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2958 of $address_data from the recipient verification was clobbered by the
2959 sender verification.
2961 13. The value of address_data from a sender verification is now available in
2962 $sender_address_data in subsequent conditions in the ACL statement.
2964 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2966 15. Added a new option "connect=<time>" to callout options, to set a different
2969 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2970 was its contents. (It was OK if the option was not defined at all.)
2972 17. A "Completed" log line is now written for messages that are removed from
2973 the spool by the -Mrm option.
2975 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2976 information about exactly what failed.
2978 19. Added -dd to debug only the daemon process.
2980 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2981 handles timeouts, both on the server side and network timeouts. Renamed the
2982 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2984 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2985 It is now set to "smtps".
2987 22. $host_address is now set to the target address during the checking of
2988 ignore_target_hosts.
2990 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2991 being passed; this would have caused $sender_host_name to have been used if
2992 matching the list had actually called for a host name (not very likely,
2993 since this list is usually IP addresses). A host name is now passed as
2996 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2997 code that specifies a non-restarting handler (typically sigaction() in
2998 modern systems) in an attempt to fix a rare and obscure crash bug.
3000 25. Narrowed the window for a race in the daemon that could cause it to ignore
3001 SIGCHLD signals. This is not a major problem, because they are used only to
3002 wake it up if nothing else does.
3004 26. A malformed maildirsize file could cause Exim to calculate negative values
3005 for the mailbox size or file count. Odd effects could occur as a result.
3006 The maildirsize information is now recalculated if the size or filecount
3009 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3010 support for a long time. Removed HAVE_SYS_VFS_H.
3012 28. Installed the latest version of exipick from John Jetmore.
3014 29. In an address list, if the pattern was not a regular expression, an empty
3015 subject address (from a bounce message) matched only if the pattern was an
3016 empty string. Non-empty patterns were not even tested. This was the wrong
3017 because it is perfectly reasonable to use an empty address as part of a
3018 database query. An empty address is now tested by patterns that are
3019 lookups. However, all the other forms of pattern expect the subject to
3020 contain a local part and a domain, and therefore, for them, an empty
3021 address still always fails if the pattern is not itself empty.
3023 30. Exim went into a mad DNS loop when attempting to do a callout where the
3024 host was specified on an smtp transport, and looking it up yielded more
3025 than one IP address.
3027 31. Re-factored the code for checking spool and log partition space into a
3028 function that finds that data and another that does the check. The former
3029 is then used to implement four new variables: $spool_space, $log_space,
3030 $spool_inodes, and $log_inodes.
3032 32. The RFC2047 encoding function was originally intended for short strings
3033 such as real names; it was not keeping to the 75-character limit for
3034 encoded words that the RFC imposes. It now respects the limit, and
3035 generates multiple encoded words if necessary. To be on the safe side, I
3036 have increased the buffer size for the ${rfc2047: expansion operator from
3039 33. It is now permitted to omit both strings after an "if" condition; if the
3040 condition is true, the result is "true". As before, when the second string
3041 is omitted, a false condition yields an empty string. This makes it less
3042 cumbersome to write custom ACL and router conditions.
3044 34. Failure to deliver a bounce message always caused it to be frozen, even if
3045 there was an errors_to setting on the router. The errors_to setting is now
3048 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3049 canonical form (fully expanded) before being placed in
3050 $sender_host_address.
3052 36. The table in the code that translates DNS record types into text (T_A to
3053 "A" for instance) was missing entries for NS and CNAME. It is just possible
3054 that this could have caused confusion if both these types were looked up
3055 for the same domain, because the text type is used as part of Exim's
3056 per-process caching. But the chance of anyone hitting this buglet seems
3059 37. The dnsdb lookup has been extended in a number of ways.
3061 (1) There is a new type, "zns", which walks up the domain tree until it
3062 finds some nameserver records. It should be used with care.
3064 (2) There is a new type, "mxh", which is like "mx" except that it returns
3065 just the host names, not the priorities.
3067 (3) It is now possible to give a list of domains (or IP addresses) to be
3068 looked up. The behaviour when one of the lookups defers can be
3069 controlled by a keyword.
3071 (4) It is now possible to specify the separator character for use when
3072 multiple records are returned.
3074 38. The dnslists ACL condition has been extended: it is now possible to supply
3075 a list of IP addresses and/or domains to be looked up in a particular DNS
3078 39. Added log_selector=+queue_time_overall.
3080 40. When running the queue in the test harness, wait just a tad after forking a
3081 delivery process, to get repeatability of debugging output.
3083 41. Include certificate and key file names in error message when GnuTLS fails
3084 to set them up, because the GnuTLS error message doesn't include the name
3085 of the failing file when there is a problem reading it.
3087 42. Allow both -bf and -bF in the same test run.
3089 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3091 44. The "Exiscan patch" is now merged into the mainline Exim source.
3093 45. Sometimes the final signoff response after QUIT could fail to get
3094 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3095 < 0 before doing a fflush(). This bug looks as though it goes back to the
3096 introduction of TLS in release 3.20, but "sometimes" must have been rare
3097 because the tests only now provoked it.
3099 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3100 (this can affect the format of dates).
3102 47. exim_tidydb, when checking for the continued existence of a message for
3103 which it has found a message-specific retry record, was not finding
3104 messages that were in split spool directories. Consequently, it was
3105 deleting retry records that should have stayed in existence.
3107 48. Steve fixed some bugs in eximstats.
3109 49. The SPA authentication driver was not abandoning authentication and moving
3110 on to the next authenticator when an expansion was forced to fail,
3111 contradicting the general specification for all authenticators. Instead it
3112 was generating a temporary error. It now behaves as specified.
3114 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3115 (the order specifies the preference for clients). The order is now AES256,
3116 AES128, 3DES, ARCFOUR128.
3118 51. Small patch to Sieve code - explicitly set From: when generating an
3121 52. Exim crashed if a remote delivery caused a very long error message to be
3122 recorded - for instance if somebody sent an entire SpamAssassin report back
3123 as a large number of 550 error lines. This bug was coincidentally fixed by
3124 increasing the size of one of Exim's internal buffers (big_buffer) that
3125 happened as part of the Exiscan merge. However, to be on the safe side, I
3126 have made the code more robust (and fixed the comments that describe what
3129 53. Now that there can be additional text after "Completed" in log lines (if
3130 the queue_time_overall log selector is set), a one-byte patch to exigrep
3131 was needed to allow it to recognize "Completed" as not the last thing in
3134 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3135 patch that reportedly fixes this has been added. I am not expert enough to
3136 create a test for it. This is what the patch creator wrote:
3138 "I found a little strange behaviour of ldap code when working with
3139 Windows 2003 AD Domain, where users was placed in more than one
3140 Organization Units. When I tried to give exim partial DN, the exit code
3141 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3142 But simultaneously result of request was absolutely normal ldap result,
3143 so I produce this patch..."
3145 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3146 REFERENCE, so I have modified the code to exclude the patch when that macro
3149 55. Some experimental protocols are using DNS PTR records for new purposes. The
3150 keys for these records are domain names, not reversed IP addresses. The
3151 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3152 leaves it alone. Component reversal etc. now happens only for IP addresses.
3155 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3157 57. Double the size of the debug message buffer (to 2048) so that more of very
3158 long debug lines gets shown.
3160 58. The exicyclog utility now does better if the number of log files to keep
3161 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3163 59. Two changes related to the smtp_active_hostname option:
3165 (1) $smtp_active_hostname is now available as a variable.
3166 (2) The default for smtp_banner uses $smtp_active_hostname instead
3167 of $primary_hostname.
3169 60. The host_aton() function is supposed to be passed a string that is known
3170 to be a valid IP address. However, in the case of IPv6 addresses, it was
3171 not checking this. This is a hostage to fortune. Exim now panics and dies
3172 if the condition is not met. A case was found where this could be provoked
3173 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3174 components; fortuitously, this particular loophole had already been fixed
3175 by change 4.50/55 above.
3177 If there are any other similar loopholes, the new check in host_aton()
3178 itself should stop them being exploited. The report I received stated that
3179 data on the command line could provoke the exploit when Exim was running as
3180 exim, but did not say which command line option was involved. All I could
3181 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3182 running as the user.
3185 61. There was a buffer overflow vulnerability in the SPA authentication code
3186 (which came originally from the Samba project). I have added a test to the
3187 spa_base64_to_bits() function which I hope fixes it.
3190 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3191 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3193 63. The daemon start-up calls getloadavg() while still root for those OS that
3194 need the first call to be done as root, but it missed one case: when
3195 deliver_queue_load_max is set with deliver_drop_privilege. This is
3196 necessary for the benefit of the queue runner, because there is no re-exec
3197 when deliver_drop_privilege is set.
3199 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3200 This has been fixed.
3202 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3203 was in use, was not putting the data itself into the right store pool;
3204 consequently, it could be overwritten for a subsequent message in the same
3205 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3208 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3210 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3211 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3212 the function were treating the return as a boolean value, which happened to
3213 work because 0=false and not-0=true, but is not correct code.
3215 68. The host_aton() function was not handling scoped IPv6 addresses (those
3216 with, for example, "%eth0" on the end) correctly.
3218 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3219 negated items (that is, ~something) in unsigned ints. Some compilers
3220 apparently mutter when there is no cast.
3222 70. If an address verification called from an ACL failed, and did not produce a
3223 user-specific message (i.e. there was only a "system" message), nothing was
3224 put in $acl_verify_message. In this situation, it now puts the system
3227 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3228 session; change 4.31/43 added the unwanted input to the log line - except
3229 that it did not do this in the start of session case. It now does.
3231 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3232 This is wrong and can cause the other end to generate a synchronization
3233 error if it is another Exim or anything else that does the synchronization
3234 check. A QUIT command is no longer sent after a timeout.
3236 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3237 during host lookups.
3239 74. The defer_ok option of callout verification was not working if it was used
3240 when verifying addresses in header lines, that is, for this case:
3242 verify = header_sender/callout=defer_ok
3244 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3245 those file descriptors could be used for SMTP connections. If anything
3246 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3247 could be sent to the SMTP client, causing chaos. The daemon now opens
3248 stdin, stdout, and stderr to /dev/null when it puts itself into the
3251 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3252 log by default. The user can override this with suitable Perl magic.
3254 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3255 the log message when discard triggers, was not working for the DATA ACL or
3256 for the non-SMTP ACL.
3258 78. Error message wording change in sieve.c.
3260 79. If smtp_accept_max_per_host was set, the number of connections could be
3261 restricted to fewer than expected, because the daemon was trying to set up
3262 a new connection before checking whether the processes handling previous
3263 connections had finished. The check for completed processes is now done
3264 earlier. On busy systems, this bug wouldn't be noticed because something
3265 else would have woken the daemon, and it would have reaped the completed
3268 80. If a message was submitted locally by a user whose login name contained one
3269 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3270 It caused a spool format error. I have fixed the spool reading code. A
3271 related problem was that the "from" clause in the Received: line became
3272 illegal because of the space(s). It is now covered by ${quote_local_part.
3274 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3277 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3279 83. Patch from Sieve maintainer to fix unterminated string problem in
3280 "vacation" handling.
3282 84. Some minor changes to the Linux configuration files to help with other
3283 OS variants using glibc.
3285 85. One more patch for Sieve to update vacation handling to latest spec.
3288 ----------------------------------------------------
3289 See the note above about the 4.44 and 4.50 releases.
3290 ----------------------------------------------------
3296 1. Change 4.43/35 introduced a bug that caused file counts to be
3297 incorrectly computed when quota_filecount was set in an appendfile
3300 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3301 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3304 3. Give more explanation in the error message when the command for a transport
3305 filter fails to execute.
3307 4. There are several places where Exim runs a non-Exim command in a
3308 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3309 was being done only for the command run by the queryprogram router. It is
3310 now done for all such subprocesses. The other cases are: ${run, transport
3311 filters, and the commands run by the lmtp and pipe transports.
3313 5. Some older OS have a limit of 256 on the maximum number of file
3314 descriptors. Exim was using setrlimit() to set 1000 as a large value
3315 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3316 systems. I've change it so that if it can't get 1000, it tries for 256.
3318 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3319 was an oversight, and furthermore, ever since the addition of extra
3320 controls (e.g. 4.43/32), the checks on when to allow different forms of
3321 "control" were broken. There should now be diagnostics for all cases when a
3322 control that does not make sense is encountered.
3324 7. $recipients is now available in the predata ACL (oversight).
3326 8. Tidy the search cache before the fork to do a delivery from a message
3327 received from the command line. Otherwise the child will trigger a lookup
3328 failure and thereby defer the delivery if it tries to use (for example) a
3329 cached ldap connection that the parent has called unbind on.
3331 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3332 of $address_data from the recipient verification was clobbered by the
3333 sender verification.
3335 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3336 was its contents. (It was OK if the option was not defined at all.)
3338 11. A "Completed" log line is now written for messages that are removed from
3339 the spool by the -Mrm option.
3341 12. $host_address is now set to the target address during the checking of
3342 ignore_target_hosts.
3344 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3345 being passed; this would have caused $sender_host_name to have been used if
3346 matching the list had actually called for a host name (not very likely,
3347 since this list is usually IP addresses). A host name is now passed as
3350 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3351 code that specifies a non-restarting handler (typically sigaction() in
3352 modern systems) in an attempt to fix a rare and obscure crash bug.
3354 15. Narrowed the window for a race in the daemon that could cause it to ignore
3355 SIGCHLD signals. This is not a major problem, because they are used only to
3356 wake it up if nothing else does.
3358 16. A malformed maildirsize file could cause Exim to calculate negative values
3359 for the mailbox size or file count. Odd effects could occur as a result.
3360 The maildirsize information is now recalculated if the size or filecount
3363 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3364 support for a long time. Removed HAVE_SYS_VFS_H.
3366 18. Updated exipick to current release from John Jetmore.
3368 19. Allow an empty sender to be matched against a lookup in an address list.
3369 Previously the only cases considered were a regular expression, or an
3372 20. Exim went into a mad DNS lookup loop when doing a callout where the
3373 host was specified on the transport, if the DNS lookup yielded more than
3376 21. The RFC2047 encoding function was originally intended for short strings
3377 such as real names; it was not keeping to the 75-character limit for
3378 encoded words that the RFC imposes. It now respects the limit, and
3379 generates multiple encoded words if necessary. To be on the safe side, I
3380 have increased the buffer size for the ${rfc2047: expansion operator from
3383 22. Failure to deliver a bounce message always caused it to be frozen, even if
3384 there was an errors_to setting on the router. The errors_to setting is now
3387 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3388 canonical form (fully expanded) before being placed in
3389 $sender_host_address.
3391 24. Updated eximstats to version 1.33
3393 25. Include certificate and key file names in error message when GnuTLS fails
3394 to set them up, because the GnuTLS error message doesn't include the name
3395 of the failing file when there is a problem reading it.
3397 26. Expand error message when OpenSSL has problems setting up cert/key files.
3400 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3401 (this can affect the format of dates).
3403 28. exim_tidydb, when checking for the continued existence of a message for
3404 which it has found a message-specific retry record, was not finding
3405 messages that were in split spool directories. Consequently, it was
3406 deleting retry records that should have stayed in existence.
3408 29. eximstats updated to version 1.35
3409 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3410 1.35 - bugfix such that pie charts by volume are generated correctly
3412 30. The SPA authentication driver was not abandoning authentication and moving
3413 on to the next authenticator when an expansion was forced to fail,
3414 contradicting the general specification for all authenticators. Instead it
3415 was generating a temporary error. It now behaves as specified.
3417 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3418 (the order specifies the preference for clients). The order is now AES256,
3419 AES128, 3DES, ARCFOUR128.
3421 31. Small patch to Sieve code - explicitly set From: when generating an
3424 32. Exim crashed if a remote delivery caused a very long error message to be
3425 recorded - for instance if somebody sent an entire SpamAssassin report back
3426 as a large number of 550 error lines. This bug was coincidentally fixed by
3427 increasing the size of one of Exim's internal buffers (big_buffer) that
3428 happened as part of the Exiscan merge. However, to be on the safe side, I
3429 have made the code more robust (and fixed the comments that describe what
3432 33. Some experimental protocols are using DNS PTR records for new purposes. The
3433 keys for these records are domain names, not reversed IP addresses. The
3434 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3435 leaves it alone. Component reversal etc. now happens only for IP addresses.
3438 34. The host_aton() function is supposed to be passed a string that is known
3439 to be a valid IP address. However, in the case of IPv6 addresses, it was
3440 not checking this. This is a hostage to fortune. Exim now panics and dies
3441 if the condition is not met. A case was found where this could be provoked
3442 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3443 components; fortuitously, this particular loophole had already been fixed
3444 by change 4.50/55 or 4.44/33 above.
3446 If there are any other similar loopholes, the new check in host_aton()
3447 itself should stop them being exploited. The report I received stated that
3448 data on the command line could provoke the exploit when Exim was running as
3449 exim, but did not say which command line option was involved. All I could
3450 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3451 running as the user.
3454 35. There was a buffer overflow vulnerability in the SPA authentication code
3455 (which came originally from the Samba project). I have added a test to the
3456 spa_base64_to_bits() function which I hope fixes it.
3459 36. The daemon start-up calls getloadavg() while still root for those OS that
3460 need the first call to be done as root, but it missed one case: when
3461 deliver_queue_load_max is set with deliver_drop_privilege. This is
3462 necessary for the benefit of the queue runner, because there is no re-exec
3463 when deliver_drop_privilege is set.
3465 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3466 was in use, was not putting the data itself into the right store pool;
3467 consequently, it could be overwritten for a subsequent message in the same
3468 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3471 38. Sometimes the final signoff response after QUIT could fail to get
3472 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3473 < 0 before doing a fflush(). This bug looks as though it goes back to the
3474 introduction of TLS in release 3.20, but "sometimes" must have been rare
3475 because the tests only now provoked it.
3481 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3482 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3483 Now it returns an integer. A number of calls were still expecting a T/F
3484 return. Fortuitously, in all cases, the tests worked in OK situations,
3485 which is the norm. However, things would have gone wrong on any write
3486 failures on the smtp file descriptor. This function is used when sending
3487 messages over SMTP and also when doing verify callouts.
3489 2. When Exim is called to do synchronous delivery of a locally submitted
3490 message (the -odf or -odi options), it no longer closes stderr before doing
3493 3. Implemented the mua_wrapper option.
3495 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3497 5. Implemented the functions header_remove(), header_testname(),
3498 header_add_at_position(), and receive_remove_recipient(), and exported them
3501 6. If an ACL "warn" statement specified the addition of headers, Exim already
3502 inserted X-ACL-Warn: at the start if there was no header name. However, it
3503 was not making this test for the second and subsequent header lines if
3504 there were newlines in the string. This meant that an invalid header could
3505 be inserted if Exim was badly configured.
3507 7. Allow an ACL "warn" statement to add header lines at the start or after all
3508 the Received: headers, as well as at the end.
3510 8. Added the rcpt_4xx retry error code.
3512 9. Added postmaster_mailfrom=xxx to callout verification option.
3514 10. Added mailfrom=xxxx to the callout verification option, for verify=
3517 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3518 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3520 12. Inserted some casts to stop certain compilers warning when using pointer
3521 differences as field lengths or precisions in printf-type calls (mostly
3522 affecting debugging statements).
3524 13. Added optional readline() support for -be (dynamically loaded).
3526 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3527 same clock tick as a message's arrival, so that its received time was the
3528 same as the "first fail" time on the retry record, and that message
3529 remained on the queue past the ultimate address timeout, every queue runner
3530 would try a delivery (because it was past the ultimate address timeout) but
3531 after another failure, the ultimate address timeout, which should have then
3532 bounced the address, did not kick in. This was a "< instead of <=" error;
3533 in most cases the first failure would have been in the next clock tick
3534 after the received time, and all would be well.
3536 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3537 being recognized when the domain list was tested by the match_domain
3538 condition in an expansion string.
3540 16. Added the ${str2b64: operator.
3542 17. Exim was always calling setrlimit() to set a large limit for the number of
3543 processes, without checking whether the existing limit was already
3544 adequate. (It did check for the limit on file descriptors.) Furthermore,
3545 errors from getrlimit() and setrlimit() were being ignored. Now they are
3546 logged to the main and panic logs, but Exim does carry on, to try to do its
3547 job under whatever limits there are.
3549 18. Imported PCRE 5.0.
3551 19. Trivial typo in log message " temporarily refused connection" (the leading
3554 20. If the log selector return_path_on_delivery was set and an address was
3555 redirected to /dev/null, the delivery process crashed because it assumed
3556 that a return path would always be set for a "successful" delivery. In this
3557 case, the whole delivery is bypassed as an optimization, and therefore no
3560 21. Internal re-arrangement: the function for sending a challenge and reading
3561 a response while authentication was assuming a zero-terminated challenge
3562 string. It's now changed to take a pointer and a length, to allow for
3563 binary data in such strings.
3565 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3567 23. Exim was not respecting finduser_retries when seeking the login of the
3568 uid under which it was called; it was always trying 10 times. (The default
3569 setting of finduser_retries is zero.) Also, it was sleeping after the final
3570 failure, which is pointless.
3572 24. Implemented tls_on_connect_ports.
3574 25. Implemented acl_smtp_predata.
3576 26. If the domain in control=submission is set empty, Exim assumes that the
3577 authenticated id is a complete email address when it generates From: or
3578 Sender: header lines.
3580 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3581 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3582 chown and chgrp in /bin and hostname in /usr/bin.
3584 28. Exim was keeping the "process log" file open after each use, just as it
3585 does for the main log. This opens the possibility of it remaining open for
3586 long periods when the USR1 signal hits a daemon. Occasional processlog
3587 errors were reported, that could have been caused by this. Anyway, it seems
3588 much more sensible not to leave this file open at all, so that is what now
3591 29. The long-running daemon process does not normally write to the log once it
3592 has entered its main loop, and it closes the log before doing so. This is
3593 so that log files can straightforwardly be renamed and moved. However,
3594 there are a couple of unusual error situations where the daemon does write
3595 log entries, and I had neglected to close the log afterwards.
3597 30. The text of an SMTP error response that was received during a remote
3598 delivery was being truncated at 512 bytes. This is too short for some of
3599 the long messages that one sometimes sees. I've increased the limit to
3602 31. It is now possible to make retry rules that apply only when a message has a
3603 specific sender, in particular, an empty sender.
3605 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3606 it possible to be selective about when SMTP synchronization is enforced.
3608 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3610 32. Implemented hosts_connection_nolog.
3612 33. Added an ACL for QUIT.
3614 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3617 35. Added mailbox_size and mailbox_filecount to appendfile.
3619 36. Added control = no_multiline_responses to ACLs.
3621 37. There was a bug in the logic of the code that waits for the clock to tick
3622 in the case where the clock went backwards by a substantial amount such
3623 that the microsecond fraction of "now" was more than the microsecond
3624 fraction of "then" (but the whole seconds number was less).
3626 38. Added support for the libradius Radius client library this is found on
3627 FreeBSD (previously only the radiusclient library was supported).
3633 1. When certain lookups returned multiple values in the form name=value, the
3634 quoting of the values was not always being done properly. Specifically:
3635 (a) If the value started with a double quote, but contained no whitespace,
3637 (b) If the value contained whitespace other than a space character (i.e.
3638 tabs or newlines or carriage returns) it was not quoted.
3639 This fix has been applied to the mysql and pgsql lookups by writing a
3640 separate quoting function and calling it from the lookup code. The fix
3641 should probably also be applied to nisplus, ibase and oracle lookups, but
3642 since I cannot test any of those, I have not disturbed their existing code.
3644 2. A hit in the callout cache for a specific address caused a log line with no
3645 reason for rejecting RCPT. Now it says "Previous (cached) callout
3646 verification failure".
3648 3. There was an off-by-one bug in the queryprogram router. An over-long
3649 return line was truncated at 256 instead of 255 characters, thereby
3650 overflowing its buffer with the terminating zero. As well as fixing this, I
3651 have increased the buffer size to 1024 (and made a note to document this).
3653 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3654 when Exim is waiting for an SMTP response from a remote server, Exim
3655 restarts its select() call on the socket, thereby resetting its timeout.
3656 This is not a problem when such interrupts are rare. Somebody set up a cron
3657 job to run exiwhat every 2 minutes, which is less than the normal select()
3658 timeout (5 or 10 minutes). This meant that the select() timeout never
3659 kicked in because it was always reset. I have fixed this by comparing the
3660 time when an interrupt arrives with the time at the start of the first call
3661 to select(). If more time than the timeout has elapsed, the interrupt is
3662 treated as a timeout.
3664 5. Some internal re-factoring in preparation for the addition of Sieve
3665 extensions (by MH). In particular, the "personal" test is moved to a
3666 separate function, and given an option for scanning Cc: and Bcc: (which is
3667 not set for Exim filters).
3669 6. When Exim created an email address using the login of the caller as the
3670 local part (e.g. when creating a From: or Sender: header line), it was not
3671 quoting the local part when it contained special characters such as @.
3673 7. Installed new OpenBSD configuration files.
3675 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3676 try to make them clearer.
3678 9. Callout options, other than the timeout value, were being ignored when
3679 verifying sender addresses in header lines. For example, when using
3681 verify = header_sender/callout=no_cache
3683 the cache was (incorrectly) being used.
3685 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3686 only the Cygwin environment.
3688 11. When return_path_on_delivery was set as a log selector, if different remote
3689 addresses in the same message used different return paths and parallel
3690 remote delivery occurred, the wrong values would sometimes be logged.
3691 (Whenever a remote delivery process finished, the return path value from
3692 the most recently started remote delivery process was logged.)
3694 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3695 lines when AUTH and/or TLS are in use. This is the "received protocol"
3696 field. Exim used to use "asmtp" for authenticated SMTP, without any
3697 indication (in the protocol name) for TLS use. Now it follows the RFC and
3698 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3699 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3700 names appear in log lines as well as in Received: header lines.
3702 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3703 extensions, and comparison tests, and to fix some bugs.
3705 14. Changes to the "personal" filter test:
3707 (1) The test was buggy in that it was just doing the equivalent of
3708 "contains" tests on header lines. For example, if a user's address was
3709 anne@some.where, the "personal" test would incorrectly be true for
3711 To: susanne@some.where
3713 This test is now done by extracting each address from the header in turn,
3714 and checking the entire address. Other tests that are part of "personal"
3715 are now done using regular expressions (for example, to check local parts
3716 of addresses in From: header lines).
3718 (2) The list of non-personal local parts in From: addresses has been
3719 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3720 taken from the Sieve specification recommendations.
3722 (3) If the message contains any header line starting with "List-" it is
3723 treated as non-personal.
3725 (4) The test for "circular" in the Subject: header line has been removed
3726 because it now seems ill-conceived.
3728 15. Minor typos in src/EDITME comments corrected.
3730 16. Installed latest exipick from John Jetmore.
3732 17. If headers_add on a router specified a text string that was too long for
3733 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3734 of string_sprintf() is now avoided.
3736 18. $message_body_size was not set (it was always zero) when running the DATA
3737 ACL and the local_scan() function.
3739 19. For the "mail" command in an Exim filter, no default was being set for
3740 the once_repeat time, causing a random time value to be used if "once" was
3741 specified. (If the value happened to be <= 0, no repeat happened.) The
3742 default is now 0s, meaning "never repeat". The "vacation" command was OK
3743 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3744 (I found it when inspecting the code).
3746 20. There is now an overall timeout for performing a callout verification. It
3747 defaults to 4 times the callout timeout, which applies to individual SMTP
3748 commands during the callout. The overall timeout applies when there is more
3749 than one host that can be tried. The timeout is checked before trying the
3750 next host. This prevents very long delays if there are a large number of
3751 hosts and all are timing out (e.g. when the network connections are timing
3752 out). The value of the overall timeout can be changed by specifying an
3753 additional sub-option for "callout", called "maxwait". For example:
3755 verify = sender/callout=5s,maxwait=20s
3757 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3758 to the end before writing, but this should make it even safer).
3760 22. Exim was forgetting that it had advertised PIPELINING for the second and
3761 subsequent messages on an SMTP connection. It was also not resetting its
3762 memory on STARTTLS and an internal HELO.
3764 23. When Exim logs an SMTP synchronization error within a session, it now
3765 records whether PIPELINING has been advertised or not.
3767 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3768 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3769 rather than long int.
3771 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3773 26. Added the never_mail option to autoreply.
3779 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3780 crash if the getsockname() call failed; this can happen if a connection is
3781 closed very soon after it is established. The problem was simply in the
3782 order in which certain operations were done, causing Exim to try to write
3783 to the SMTP stream before it had set up the file descriptor. The bug has
3784 been fixed by making things happen in the correct order.
3790 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3791 before the connection was closed, thus losing the rejection response.
3793 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3794 some early Solaris releases, but causes trouble in current releases where
3795 socklen_t is defined.
3797 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3800 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3803 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3804 that releasing the top of it at the end releases what was used for sub-
3805 expansions (unless the block got too big). However, discard this block if
3806 the first thing is a variable or header, so that we can use its block when
3807 it is dynamic (useful for very large $message_headers, for example).
3809 6. Lookups now cache *every* query, not just the most recent. A new, separate
3810 store pool is used for this. It can be recovered when all lookup caches are
3811 flushed. Lookups now release memory at the end of their result strings.
3812 This has involved some general refactoring of the lookup sources.
3814 7. Some code has been added to the store_xxx() functions to reduce the amount
3815 of flapping under certain conditions.
3817 8. log_incoming_interface used to affect only the <= reception log lines. Now
3818 it causes the local interface and port to be added to several more SMTP log
3819 lines, for example "SMTP connection from", and rejection lines.
3821 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3823 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3825 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3826 could be overwritten at the end of the current message (or the start of a
3827 new message if it was set in a HELO ACL). The value is now preserved for
3828 the duration of the SMTP connection.
3830 12. If a transport had a headers_rewrite setting, and a matching header line
3831 contained an unqualified address, that address was qualified, even if it
3832 did not match any rewriting rules. The underlying bug was that the values
3833 of the flags that permit the existence of unqualified sender and recipient
3834 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3835 non-local messages, and by -bnq for local messages) were not being
3836 preserved with the message after it was received.
3838 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3839 "next input=" as part of the text comprising the host identity instead of
3840 the correct text. The code was using the same buffer for two different
3841 strings. However, depending on which order the printing function evaluated
3842 its arguments, the bug did not always show up. Under Linux, for example, my
3843 test suite worked just fine.
3845 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3846 doesn't work with some older versions of Perl. It has been changed to "my",
3847 which in any case is probably the better facility to use.
3849 15. A really picky compiler found some instances of statements for creating
3850 error messages that either had too many or two few arguments for the format
3853 16. The size of the buffer for calls to the DNS resolver has been increased
3854 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3855 for addresses that have a lot of PTR records. This alleviates a problem; it
3856 does not fully solve it.
3858 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3859 buffer now truncates the list and logs the incident, which is the same
3860 action as happens when Exim is looking up a host name and its aliases.
3861 Previously in this situation something unpredictable would happen;
3862 sometimes it was "internal error: store_reset failed".
3864 18. If a server dropped the connection unexpectedly when an Exim client was
3865 using GnuTLS and trying to read a response, the client delivery process
3866 crashed while trying to generate an error log message.
3868 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3869 string, for example:
3871 warn message = H1: something\nH2: something
3873 the text was added as a single header line from Exim's point of view
3874 though it ended up OK in the delivered message. However, searching for the
3875 second and subsequent header lines using $h_h2: did not work. This has been
3876 fixed. Similarly, if a system filter added multiple headers in this way,
3877 the routers could not see them.
3879 20. Expanded the error message when iplsearch is called with an invalid key to
3880 suggest using net-iplsearch in a host list.
3882 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3883 ACLs are no longer actually imposed (and a message to that effect is
3886 22. If a "gecos" field in a passwd entry contained escaped characters, in
3887 particular, if it contained a \" sequence, Exim got it wrong when building
3888 a From: or a Sender: header from that name. A second bug also caused
3889 incorrect handling when an unquoted " was present following a character
3890 that needed quoting.
3892 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3893 was not being matched caselessly.
3895 24. Arranged for all hyphens in the exim.8 source to be escaped with
3898 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3899 properly. Recipient callout cache records were still being keyed to include
3900 the sender, even when use_sender was set false. This led to far more
3901 callouts that were necessary. The sender is no longer included in the key
3902 when use_sender is false.
3904 26. Added "control = submission" modifier to ACLs.
3906 27. Added the ${base62d: operator to decode base 62 numbers.
3908 28. dnsdb lookups can now access SRV records.
3910 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3911 the configuration file.
3913 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3914 (-v) mode. This makes the output for a verbose queue run more intelligible.
3916 31. Added a use_postmaster feature to recipient callouts.
3918 32. Added the $body_zerocount variable, containing the number of binary zero
3919 bytes in the message body.
3921 33. The time of last modification of the "new" subdirectory is now used as the
3922 "mailbox time last read" when there is a quota error for a maildir
3925 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3927 35. Added +ignore_unknown as a special item in host lists.
3929 36. Code for decoding IPv6 addresses in host lists is now included, even if
3930 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3931 address was recognized as an IP address, but was then not correctly decoded
3932 into binary, causing unexpected and incorrect effects when compared with
3939 1. Very minor rewording of debugging text in manualroute to say "list of
3940 hosts" instead of "hostlist".
3942 2. If verify=header_syntax was set, and a header line with an unqualified
3943 address (no domain) and a large number of spaces between the end of the
3944 name and the colon was received, the reception process suffered a buffer
3945 overflow, and (when I tested it) crashed. This was caused by some obsolete
3946 code that should have been removed. The fix is to remove it!
3948 3. When running in the test harness, delay a bit after writing a bounce
3949 message to get a bit more predictability in the log output.
3951 4. Added a call to search_tidyup() just before forking a reception process. In
3952 theory, someone could use a lookup in the expansion of smtp_accept_max_
3953 per_host which, without the tidyup, could leave open a database connection.
3955 5. Added the variables $recipient_data and $sender_data which get set from a
3956 lookup success in an ACL "recipients" or "senders" condition, or a router
3957 "senders" option, similar to $domain_data and $local_part_data.
3959 6. Moved the writing of debug_print from before to after the "senders" test
3962 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3963 problems for message scanning, either using a data ACL, or using
3964 local_scan() because the Received: header was not generated till after they
3965 were called (in order to set the time as the time of reception completion).
3966 I have revised the way this works. The header is now generated after the
3967 body is received, but before the ACL or local_scan() are called. After they
3968 are run, the timestamp in the header is updated.
3974 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3975 before starting a queue runner without re-exec. This happened only when
3976 deliver_drop_privilege was set or when the Exim user was set to root. The
3977 effect of the bug was that timeouts during subsequent deliveries caused
3978 crashes instead of being properly handled. The handler is now left at its
3979 default (and expected) setting.
3981 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3982 message, again when deliver_drop_privilege is set or Exim is run as root.
3983 The bug described in (1) was not present in this case, but the tidying up
3984 of the other signals was missing. I have made the two cases consistent.
3986 3. The ignore_target_hosts setting on a manualroute router was being ignored
3987 for hosts that were looked up using the /MX notation.
3989 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3992 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3993 operated on the sender address. After changing the $sender_address to <>
3994 for the sender address verify, Exim was re-instated it as the original
3995 (before rewriting) address, but remembering that it had rewritten it, so it
3996 wasn't rewriting it again. This bug also had the effect of breaking the
3997 sender address verification caching when the sender address was rewritten.
3999 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4000 This has been changed so that if the ip literal address matches
4001 ignore_target_hosts, the router declines.
4003 7. Added expansion conditions match_domain, match_address, and match_local_
4004 part (NOT match_host).
4006 8. The placeholder for the Received: header didn't have a length field set.
4008 9. Added code to Exim itself and to exim_lock to test for a specific race
4009 condition that could lead to file corruption when using MBX delivery. The
4010 issue is with the lockfile that is created in /tmp. If this file is removed
4011 after a process has opened it but before that process has acquired a lock,
4012 there is the potential for a second process to recreate the file and also
4013 acquire a lock. This could lead to two Exim processes writing to the file
4014 at the same time. The added code performs the same test as UW imapd; it
4015 checks after acquiring the lock that its file descriptor still refers to
4016 the same named file.
4018 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4019 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4022 11. Added the smtp_active_hostname option. If used, this will typically be made
4023 to depend on the incoming interface address. Because $interface_address is
4024 not set up until the daemon has forked a reception process, error responses
4025 that can happen earlier (such as "too many connections") no longer contain
4028 12. If an expansion in a condition on a "warn" statement fails because a lookup
4029 defers, the "warn" statement is abandoned, and the next ACL statement is
4030 processed. Previously this caused the whole ACL to be aborted.
4032 13. Added the iplsearch lookup type.
4034 14. Added ident_timeout as a log selector.
4036 15. Added tls_certificate_verified as a log selector.
4038 16. Added a global option tls_require_ciphers (compare the smtp transport
4039 option of the same name). This controls incoming TLS connections.
4041 17. I finally figured out how to make tls_require_ciphers do a similar thing
4042 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4043 before starting the TLS session.
4045 18. Tabs are now shown as \t in -bP output.
4047 19. If the log selector return_path_on_delivery was set, Exim crashed when
4048 bouncing a message because it had too many Received: header lines.
4050 20. If two routers both had headers_remove settings, and the first one included
4051 a superfluous trailing colon, the final name in the first list and the
4052 first name in the second list were incorrectly joined into one item (with a
4053 colon in the middle).
4059 1. Added -C and -D options to the exinext utility, mainly to make it easier
4060 to include in the automated testing, but these could be helpful when
4061 multiple configurations are in use.
4063 2. The exinext utility was not formatting the output nicely when there was
4064 an alternate port involved in the retry record key, nor when there was a
4065 message id as well (for retries that were specific to a specific message
4066 and a specific host). It was also confused by IPv6 addresses, because of
4067 the additional colons they contain. I have fixed the IPv4 problem, and
4068 patched it up to do a reasonable job for IPv6.
4070 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4071 delivery, the log line now contains "pipelined" if PIPELINING was used.
4073 4. An SMTP transport process used to panic and die if the bind() call to set
4074 an explicit outgoing interface failed. This has been changed; it is now
4075 treated in the same way as a connect() failure.
4077 5. A reference to $sender_host_name in the part of a conditional expansion
4078 that was being skipped was still causing a DNS lookup. This no longer
4081 6. The def: expansion condition was not recognizing references to header lines
4082 that used bh_ and bheader_.
4084 7. Added the _cache feature to named lists.
4086 8. The code for checking quota_filecount in the appendfile transport was
4087 allowing one more file than it should have been.
4089 9. For compatibility with Sendmail, the command line option
4097 and sets the incoming protocol and host name (for trusted callers). The
4098 host name and its colon can be omitted when only the protocol is to be set.
4099 Note the Exim already has two private options, -pd and -ps, that refer to
4100 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4101 "s", but I don't think that's a major issue.
4103 10. A number of refactoring changes to the code, none of which should affect
4106 (a) The number of logging options was getting close to filling up the
4107 32-bit word that was used as a bit map. I have split them into two classes:
4108 those that are passed in the argument to log_write(), and those that are
4109 only ever tested independently outside of that function. These are now in
4110 separate 32-bit words, so there is plenty of room for expansion again.
4111 There is no change in the user interface or the logging behaviour.
4113 (b) When building, for example, log lines, the code previously used a
4114 macro that called string_cat() twice, in order to add two strings. This is
4115 not really sufficiently general. Furthermore, there was one instance where
4116 it was actually wrong because one of the argument was used twice, and in
4117 one call a function was used. (As it happened, calling the function twice
4118 did not affect the overall behaviour.) The macro has been replaced by a
4119 function that can join an arbitrary number of extra strings onto a growing
4122 (c) The code for expansion conditions now uses a table and a binary chop
4123 instead of a serial search (which was left over from when there were very
4124 few conditions). Also, it now recognizes conditions like "pam" even when
4125 the relevant support is not compiled in: a suitably worded error message is
4126 given if an attempt is made to use such a condition.
4128 11. Added ${time_interval:xxxxx}.
4130 12. A bug was causing one of the ddress fields not to be passed back correctly
4131 from remote delivery subprocesses. The field in question was not being
4132 subsequently used, so this caused to problems in practice.
4134 13. Added new log selectors queue_time and deliver_time.
4136 14. Might have fixed a bug in maildirsizefile handling that threw up
4137 "unexpected character" debug warnings, and recalculated the data
4138 unnecessarily. In any case, I expanded the warning message to give more
4141 15. Added the message "Restricted characters in address" to the statements in
4142 the default ACL that block characters like @ and % in local parts.
4144 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4145 Three changes have been made:
4147 (a) There was a serious bug; a negative response to MAIL caused the whole
4148 recipient domain to be cached as invalid, thereby blocking all messages
4149 to all local parts at the same domain, from all senders. This bug has
4150 been fixed. The domain is no longer cached after a negative response to
4151 MAIL if the sender used is not empty.
4153 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4156 (c) A new callout option, "use_sender" has been added for people who want
4157 the modified behaviour.
4163 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4166 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4167 indeed breaks things for older releases.
4169 3. Added additional logging to the case where there is a problem reading data
4170 from a filter that is running in a subprocess using a pipe, in order to
4171 try to track down a specific problem.
4173 4. Testing facility fudge: when running in the test harness and attempting
4174 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4175 getting "No route to host". Convert this to a timeout.
4177 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4180 6. Some OS don't have socklen_t but use size_t instead. This affects the
4181 fifth argument of getsockopt() amongst other things. This is now
4182 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4183 can be set for individual OS. I have set it for SunOS5, OSF1, and
4184 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4185 some earlier ones do not.
4187 7. Change 4.30/15 was not doing the test caselessly.
4189 8. The standard form for an IPv6 address literal was being rejected by address
4190 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4191 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4192 this, as well as the form without the "IPv6" on the front (but only when
4193 address literals are enabled, of course).
4195 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4197 10. Exim crashed if a message with an empty sender address specified by -f
4198 encountered a router with an errors_to setting. This could be provoked only
4199 by a command such as
4203 where an empty string was supplied; "<>" did not hit this bug.
4205 11. Installed PCRE release 4.5.
4207 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4208 remained set. It is now erased.
4210 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4211 times from message ids (which are base 36 rather than the normal 62).
4213 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4214 were being counted as actual protocol errors, and logged if the log
4215 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4216 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4217 and DATA following a set of rejected RCPTs do not count as protocol errors.
4218 In other words, Exim assumes they were pipelined, though this may not
4219 actually be the case. Of course, in all cases the client gets an
4220 appropriate error code.
4222 15. If a lookup fails in an ACL condition, a message about the failure may
4223 be available; it is used if testing the ACL cannot continue, because most
4224 such messages specify what the cause of the deferral is. However, some
4225 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4226 that caused an old message to be retained and used if a later statement
4227 caused a defer, replacing the real cause of the deferral.
4229 16. If an IP address had so many PTR records that the DNS lookup buffer
4230 was not large enough to hold them, Exim could crash while trying to process
4231 the truncated data. It now detects and logs this case.
4233 17. Further to 4.21/58, another change has been made: if (and only if) the
4234 first line of a message (the first header line) ends with CRLF, a bare LF
4235 in a subsequent header line has a space inserted after it, so as not to
4236 terminate the header.
4238 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4239 unnecessarily, used atoi() instead of strtol(), and didn't check the
4240 termination when getting file sizes from file names by regex.
4242 19. Completely re-implemented the support for maildirsize files, in the light
4243 of a number of problems with the previous contributed implementation
4244 (4.30/29). In particular:
4246 . If the quota is zero, the maildirsize file is maintained, but no quota is
4249 . If the maildir directory does not exist, it is created before any attempt
4250 to write a maildirsize file.
4252 . The quota value in the file is just a cache; if the quota is changed in
4253 the transport, the new value overrides.
4255 . A regular expression is available for excluding directories from the
4258 20. The autoreply transport checks the characters in options that define the
4259 message's headers; it allows continued headers, but it was checking with
4260 isspace() after an embedded newline instead of explicitly looking for a
4263 21. If all the "regular" hosts to which an address was routed had passed their
4264 expiry times, and had not reached their retry times, the address was
4265 bounced, even if fallback hosts were defined. Now Exim should go on to try
4268 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4269 equivalent code in the SMTP transport. Some hosts send humungous responses
4270 to HELO/EHLO, more than 1024 it seems.
4272 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4273 gives compiler warnings in some environments. I've now done it "properly",
4276 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4277 (because of problems with the built-in one) was declared to return uschar *
4278 instead of char *, causing compiler failure.
4280 25. Fixed a file descriptor leak when processing alias/forward files.
4282 26. Fixed a minor format string issue in dbfn.c.
4284 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4286 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4287 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4290 29. When a sender address is verified, it is cached, to save repeating the test
4291 when there is more than one recipient in a message. However, when the
4292 verification involves a callout, it is possible for different callout
4293 options to be set for different recipients. It is too complicated to keep
4294 track of this in the cache, so now Exim always runs a verification when a
4295 callout is required, relying on the callout cache for the optimization.
4296 The overhead is duplication of the address routing, but this should not be
4299 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4300 to be verified with callout=postmaster, and the main callout worked but the
4301 postmaster check failed, the verification correctly failed. However, if a
4302 subsequent RCPT command asked for sender verification *without* the
4303 postmaster check, incorrect caching caused this verification also to fail,
4306 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4307 it was not caching the DNS options (qualify_single, search_parents) that
4308 were used when the lookup failed. A subsequent lookup with different
4309 options therefore always gave the same answer, though there were cases
4310 where it should not have. (Example: a "domains = !$mx_any" option on a
4311 dnslookup router: the "domains" option is always processed without any
4312 widening, but the router might have qualify_single set.) Now Exim uses the
4313 cached value only when the same options are set.
4315 32. Added John Jetmore's "exipick" utility to the distribution.
4317 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4318 than a timeout (e.g. a certificate is required, and is not provided), an
4319 Exim server now closes the connection immediately. Previously it waited for
4320 the client to close - but if the client is SSL, it seems that they each
4321 wait for each other, leading to a delay before one of them times out.
4323 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4324 maintained 0.8.x compatibility because I don't think many are using it, and
4325 it is clearly obsolete.
4327 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4330 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4331 client certificate was expired. A simple patch fixes this, though I don't
4332 understand the full logic of why the verify callback is called multiple
4335 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4336 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4337 which causes problems with some clients (such as the Certicom SSL Plus
4338 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4339 disables the coutermeasure allowing Eudora to connect."
4341 38. Exim was not checking that a write() to a log file succeeded. This could
4342 lead to Bad Things if a log got too big, in particular if it hit a file
4343 size limit. Exim now panics and dies if it cannot write to a log file, just
4344 as it does if it cannot open a log file.
4346 39. Modified OS/Makefile-Linux so that it now contains
4348 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4350 The two -D definitions ensure that Exim is compiled with large file
4351 support, which makes it possible to handle log files that are bigger than
4354 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4355 instance) a domain was checked against a named list that involved a lookup,
4356 causing $domain_data to be set, then another domain was checked against the
4357 same list, then the first domain was re-checked, the value of $domain_data
4358 after the final check could be wrong. In particular, if the second check
4359 failed, it could be set empty. This bug probably also applied to
4362 41. The strip_trailing_dot option was not being applied to the address given
4363 with the -f command-line option.
4365 42. The code for reading a message's header from the spool was incrementing
4366 $received_count, but never initializing it. This meant that the value was
4367 incorrect (doubled) while delivering a message in the same process in which
4368 it was received. In the most common configuration of Exim, this never
4369 happens - a fresh exec is done - but it can happen when
4370 deliver_drop_privilege is set.
4372 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4373 it now includes up to 150 characters of the unexpected data in the log
4376 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4377 and building data strings. The size of both of these buffers was 10 000
4378 bytes - far larger than anybody would *ever* want, thought I. Needless to
4379 say, somebody hit the limit. I have increased the maximum line length to
4380 20 000 and the maximum data length of concatenated lines to 100 000. I have
4381 also fixed two bugs, because there was no checking on these buffers. Tsk,
4382 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4383 buffer is too small.
4385 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4386 lsearch lookups. Now it does.
4388 46. When parsing a route_list item in a manualroute router, a fixed-length
4389 buffer was used for the list of hosts. I made this 1024 bytes long,
4390 thinking that nobody would ever have a list of hosts that long. Wrong.
4391 Somebody had a whole pile of complicated expansion conditions, and the
4392 string was silently truncated, leading to an expansion error. It turns out
4393 that it is easier to change to an unlimited length (owing to other changes
4394 that have happened since this code was originally written) than to build
4395 structure for giving a limitation error. The length of the item that
4396 expands into the list of hosts is now unlimited.
4398 47. The lsearch lookup could not handle data where the length of text line was
4399 more than 4095 characters. Such lines were truncated, leading to shortened
4400 data being returned. It should now handle lines of any length.
4402 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4403 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4406 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4407 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4408 no longer happens in comment lines. A list of replacements is now placed
4409 at the head of all of the source files, except those whose only change is
4410 to replace PERL_COMMAND in the very first #! line.
4412 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4413 messages on the queue, with a bottom-up merge sort, using code contributed
4414 by Michael Haardt. This should make operations like -bp somewhat faster on
4415 large queues. It won't affect queue runners, except when queue_run_in_order
4418 51. Installed eximstats 1.31 in the distribution.
4420 52. Added support for SRV lookups to the dnslookup router.
4422 53. If an ACL referred to $message_body or $message_body_end, the value was not
4423 reset for any messages that followed in the same SMTP session.
4425 54. The store-handling optimization for building very long strings was not
4426 differentiating between the different store pools. I don't think this
4427 actually made any difference in practice, but I've tidied it.
4429 55. While running the routers to verify a sender address, $sender_address
4430 was still set to the sender address. This is wrong, because when routing to
4431 send a bounce to the sender, it would be empty. Therefore, I have changed
4432 it so that, while verifying a sender address, $sender_address is set to <>.
4433 (There is no change to what happens when verifying a recipient address.)
4435 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4436 target A or AAAA records (if not already returned) without resetting the
4437 qualify_single or search_parents options of the DNS resolver. These are
4438 inappropriate in this case because the targets of MX and SRV records must
4439 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4440 target that, when qualified, matched something in the local domain. These
4441 two options are now turned off when doing these lookups.
4443 57. It seems that at least some releases of Reiserfs (which does not have the
4444 concept of a fixed number of inodes) returns zero and not -1 for the
4445 number of available inodes. This interacted badly with check_spool_inodes,
4446 which assumed that -1 was the "no such thing" setting. What I have done is
4447 to check that the total number of inodes is greater than zero before doing
4448 the test of how many are available.
4450 58. When a "warn" ACL statement has a log_message modifier, the message is
4451 remembered, and not repeated. This is to avoid a lot of repetition when a
4452 message has many recipients that cause the same warning to be written.
4453 Howewer, Exim was preserving the list of already written lines for an
4454 entire SMTP session, which doesn't seem right. The memory is now reset if a
4455 new message is started.
4457 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4458 debugging output unless log_rewrite was also set.
4460 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4461 of (int)(handle) when we know that handle contains (void *)(-1).
4463 61. The Exim daemon panic-logs an error return when it closes the incoming
4464 connection. However "connection reset by peer" seems to be common, and
4465 isn't really an error worthy of noting specially, so that particular error
4468 62. When Exim is trying to find all the local interfaces, it used to panic and
4469 die if the ioctl to get the interface flags failed. However, it seems that
4470 on at least one OS (Solaris 9) it is possible to have an interface that is
4471 included in the list of interfaces, but for which you get a failure error
4472 for this call. This happens when the interface is not "plumbed" into a
4473 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4474 failure of the "get flags" call assumes that the interface is down.
4476 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4477 makes life easier for people who are doing arithmetic on fields extracted
4478 from dates, where you often get leading zeros that should not be
4479 interpreted as octal.
4481 64. Added qualify_domain to the redirect router, to override the global
4484 65. If a pathologically long header line contained very many addresses (the
4485 report of this problem mentioned 10 000) and each of them was rewritten,
4486 Exim could use up a very large amount of memory. (It kept on making new
4487 copies of the header line as it rewrote, and never released the old ones.)
4488 At the expense of a bit more processing, the header rewriting function has
4489 been changed so that it no longer eats memory in this way.
4491 66. The generation of the Received: header has been moved from the time that a
4492 message starts to be received, to the time that it finishes. The timestamp
4493 in the Received: header should now be very close to that of the <= log
4494 line. There are two side-effects of this change:
4496 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4497 logged header lines no longer include the local Received: line, because
4498 it has not yet been created. The same applies to a copy of the message
4499 that is returned to a non-SMTP sender when a message is rejected.
4501 (b) When a filter file is tested using -bf, no additional Received: header
4502 is added to the test message. After some thought, I decided that this
4505 This change does not affect the value of $received_for. It is still set
4506 after address rewriting, but before local_scan() is called.
4508 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4510 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4511 gave an unhelpful panic error message, and a defer error. I have managed to
4512 change this behaviour so that it now rejects any supplied certificate,
4513 which seems right, as the list of acceptable certificates is empty.
4515 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4516 gave an unhelpful defer error. I have not managed to make this reject any
4517 supplied certificates, but the error message it gives is "no certificate
4518 supplied", which is not helpful.
4520 70. exigrep's output now also includes lines that are not associated with any
4521 message, but which match the given pattern. Implemented by a patch from
4522 Martin Sluka, which also tidied up the Perl a bit.
4524 71. Recipient callout verification, like sender verification, was using <> in
4525 the MAIL FROM command. This isn't really the right thing, since the actual
4526 sender may affect whether the remote host accepts the recipient or not. I
4527 have changed it to use the actual sender in the callout; this means that
4528 the cache record is now keyed on a recipient/sender pair, not just the
4529 recipient address. There doesn't seem to be a real danger of callout loops,
4530 since a callout by the remote host to check the sender would use <>.
4531 [SEE ABOVE: changed after hitting problems.]
4533 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4534 temporary errors. However, in the case of such a code being given after
4535 the end of a data transmission (i.e. after ".") Exim was failing to write
4536 a retry record for the message. (Yes, there was some broken host that was
4537 actually sending 8xx at this point.)
4539 73. An unknown lookup type in a host list could cause Exim to panic-die when
4540 the list was checked. (An example that provoked this was putting <; in the
4541 middle of a list instead of at the start.) If this happened during a DATA
4542 ACL check, a -D file could be left lying around. This kind of configuration
4543 error no longer causes Exim to die; instead it causes a defer errror. The
4544 incident is still logged to the main and panic logs.
4546 74. Buglet left over from Exim 3 conversion. The message "too many messages
4547 in one connection" was written to the rejectlog but not the mainlog, except
4548 when address rewriting (yes!) was being logged.
4550 75. Added write_rejectlog option.
4552 76. When a system filter was run not as root (that is, when system_filter_user
4553 was set), the values of the $n variables were not being returned to the
4554 main process; thus, they were not subsequently available in the $sn
4557 77. Added +return_path_on_delivery log selector.
4559 78. A connection timeout was being treated differently from recipients deferred
4560 when testing hosts_max_try with a message that was older than the host's
4561 retry timeout. (The host should not be counted, thus allowing all hosts to
4562 be tried at least once before bouncing.) This may have been the cause of an
4563 occasionally reported bug whereby a message would remain on the queue
4564 longer than the retry timeout, but would be bounced if a delivery was
4565 forced. I say "may" because I never totally pinned down the problem;
4566 setting up timeout/retry tests is difficult. See also the next item.
4568 79. The ultimate address timeout was not being applied to errors that involved
4569 a combination of host plus message (for example, a timeout on a MAIL
4570 command). When an address resolved to a number of possible hosts, and they
4571 were not all tried for each delivery (e.g. because of hosts_max_try), a
4572 message could remain on the queue longer than the retry timeout.
4574 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4577 81. Fixed an obscure SMTP outgoing bug which required at least the following
4578 conditions: (a) there was another message waiting for the same server;
4579 (b) the server returned 5xx to all RCPT commands in the first message so
4580 that the message was not completed; (c) the server dropped the connection
4581 or gave a negative response to the RSET that Exim sends to abort the
4582 transaction. The observed case was a dropped connection after DATA that had
4583 been sent in pipelining mode. That is, the server had advertised PIPELINING
4584 but was not implementing it correctly. The effect of the bug was incorrect
4585 behaviour, such as trying another host, and this could lead to a crash.
4591 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4592 and daemon.c were passed as pointers to ints; they should have been
4593 pointers to socklen_t variables (which are typically unsigned ints).
4595 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4598 3. Fixed a really odd bug that affected only the testing scheme; patching a
4599 certain fixed string in the binary changed the value of another string that
4600 happened to be identical to the end of the original first string.
4602 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4603 name", it returns that address as the IP address. On some operating
4604 systems (e.g. Solaris), it also passes back the IP address string as the
4605 "host name". However, on others (e.g. Linux), it passes back an empty
4606 string. Exim wasn't checking for this, and was changing the host name to an
4607 empty string, assuming it had been canonicized.
4609 5. Although rare, it is permitted to have more than one PTR record for a given
4610 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4611 all the names associated with an address, because they do in Solaris.
4612 However, it seems that they do not in Linux for data that comes from the
4613 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4614 I found this out when I moved to a new Linux workstation and tried to run
4615 the Exim test suite.
4617 To get round this problem I have changed the code so that it now does its
4618 own call to the DNS to look up PTR records when searching for a host name.
4619 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4620 addresses that are only in /etc/hosts are still found.
4622 This behaviour is, however, controlled by an option called host_lookup_
4623 order, which defaults to "bydns:byaddr". If people want to use the other
4624 order, or indeed, just use one or the other means of lookup, they can
4625 specify it in this variable.
4627 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4628 some operating systems, this comes back from gethostbyaddr() as an empty
4629 string, and this is what Exim used to test for. However, it seems that in
4630 other systems, "." is yielded. Exim now tests for this case too.
4632 7. The values of check_spool_space and check_log_space are now held internally
4633 as a number of kilobytes instead of an absolute number of bytes. If a
4634 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4635 kilobyte. This means that much larger values can be stored.
4637 8. Exim monitor: an attempt to get the action menu when not actually pointing
4638 at a message produces an empty menu entitled "No message selected". This
4639 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4640 no entries in it ("Shell widget menu has zero width and/or height"). So I
4641 have added a single, blank menu entry in this case.
4643 9. Added ${quote_local_part.
4645 10. MIME decoding is now applied to the contents of Subject: header lines when
4648 11. Now that a reference to $sender_host_address automatically causes a reverse
4649 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4650 host lookup before query-style lookups in lists that might use this
4651 variable. This has therefore been abolished, and the "net-" prefix is no
4652 longer necessary for query-style lookups.
4654 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4655 have been a typo for LFLAGS, so it has been changed.
4657 13. The install script calls Exim with "-C /dev/null" in order to find the
4658 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4659 to be output. Howeve, since Exim outputs its version number before the
4660 error, it didn't break the script. It just looked ugly. I fixed this by
4661 always allowing "-C /dev/null" if the caller is root.
4663 14. Ignore overlarge ACL variable number when reading spool file - insurance
4664 against a later release with more variables having written the file.
4666 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4667 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4668 this, as well as the form without the "IPv6" on the front.
4670 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4671 OS/Makefile-Darwin file.
4673 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4674 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4676 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4677 variable. However, some OS use ints for inodes. I've added cast to long int
4678 to get rid of the compiler warning.
4680 19. I had forgotten to lock out "/../" in configuration file names when
4681 ALT_CONFIG_PREFIX was set.
4683 20. Routers used for verification do not need to specify transports. However,
4684 if such a router generated a host list, and callout was configured, Exim
4685 crashed, because it could not find a port number from the (non-existent)
4686 transport. It now assumes port 25 in this circumstance.
4688 21. Added the -t option to exigrep.
4690 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4691 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4692 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4693 them is set, LOOKUP_LSEARCH is forced.
4695 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4697 24. Added sender and host information to the "rejected by local_scan()" log
4698 line; previously there was no indication of these.
4700 25. Added .include_if_exists.
4702 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4703 Linux. It turns out that not all file systems support this. Apparently some
4704 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4705 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4706 not supported on the file descriptor, is now ignored when Exim is trying to
4707 sync a directory. This applies only to Linux.
4709 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4711 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4712 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4715 29. Added support for maildirsize files from supplied patch (modified a bit).
4717 30. The use of :fail: followed by an empty string could lead Exim to respond to
4718 sender verification failures with (e.g.):
4720 550 Verification failed for <xxx>
4721 550 Sender verify failed
4723 where the first response line was missing the '-' that indicates it is not
4724 the final line of the response.
4726 31. The loop for finding the name of the user that called Exim had a hardwired
4727 limit of 10; it now uses the value of finduser_retries, which is used for
4728 all other user lookups.
4730 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4733 33. Exim was neglecting to zero errno before one call of strtol() when
4734 expanding a string and expecting an integer value. On some systems this
4735 resulted in spurious "integer overflow" errors. Also, it was casting the
4736 result into an int without checking.
4738 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4739 did not work. The code looks as if it has *never* worked, though it appears
4740 to have been documented since at least releast 1.62. I have made it work.
4742 35. The "timeout_DNS" error in retry rules, also documented since at least
4743 1.62, also never worked. As it isn't clear exactly what this means, and
4744 clearly it isn't a major issue, I have abolished the feature by treating it
4745 as "timeout", and writing a warning to the main and panic logs.
4747 36. The display of retry rules for -brt wasn't always showing the error code
4750 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4751 timeout_connect_A, timeout_connect_MX.
4753 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4754 to the empty sender.
4756 39. The daemon was not analysing the content of -oX till after it had closed
4757 stderr and disconnected from the controlling terminal. This meant that any
4758 syntax errors were only noted on the panic log, and the return code from
4759 the command was 0. By re-arranging the code a little, I've made the
4760 decoding happen first, so such errors now appear on stderr, and the return
4761 code is 1. However, the actual setting up of the sockets still happens in
4762 the disconnected process, so errors there are still only recorded on the
4765 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4766 connections (as happens on some IP stacks) was logged at start up time as
4767 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4768 it from "IPv6 and IPv4", which means that two separate sockets are being
4771 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4772 says whether AF_INET or AF_INET6 was passed as an argument.
4774 42. Exiwhat output was messed up when time zones were included in log
4777 43. Exiwhat now gives more information about the daemon's listening ports,
4778 and whether -tls-on-connect was used.
4780 44. The "port" option of the smtp transport is now expanded.
4782 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4783 silently ignored. Now an error message is written to the main and panic
4786 46. There's a new ACL modifier called "logwrite" which writes to a log file
4787 as soon as it is encountered.
4789 47. Added $local_user_uid and $local_user_gid at routing time.
4791 48. Exim crashed when trying to verify a sender address that was being
4794 49. Exim was recognizing only a space character after ".include". It now also
4795 recognizes a tab character.
4797 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4798 extracting the relevant information from the specification. The man page no
4799 longer contains scrambled data for the -d option, and I've added a section
4800 at the front about calling Exim under different names.
4802 51. Added "extra_headers" argument to the "mail" command in filter files.
4804 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4807 53. Installed eximstats 1.29.
4809 54. Added transport_filter_timeout as a generic transport option.
4811 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4812 Cc: header lines. This was required by RFC 822, but it not required by RFC
4815 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4816 incoming messages that did not have them. Now it does so only if the
4817 message originates locally, that is, if there is no associated remote host
4818 address. When Resent- header lines are present, this applies to the Resent-
4819 lines rather than the non-Resent- lines.
4821 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4822 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4824 58. Messages for configuration errors now include the name of the main
4825 configuration file - useful now that there may be more than one file in a
4826 list (.included file names were always shown).
4828 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4829 for those rare installations that do not start the daemon as root or run it
4830 setuid root. I've cut out the call to initgroups() if the daemon is not
4833 60. The Exim user and group can now be bound into the binary as text strings
4834 that are looked up at the start of Exim's processing.
4836 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4838 62. Added $mailstore_basename variable.
4840 63. Installed patch to sieve.c from Michael Haardt.
4842 64. When Exim failed to open the panic log after failing to open the main log,
4843 the original message it was trying to log was written to stderr and debug
4844 output, but if they were not available (the usual case in production), it
4845 was lost. Now it is written to syslog before the two lines that record the
4846 failures to open the logs.
4848 65. Users' Exim filters run in subprocesses under the user's uid. It is
4849 possible for a "deliver" command or an alias in a "personal" command to
4850 provoke an address rewrite. If logging of address rewriting is configured,
4851 this fails because the process is not running as root or exim. There may be
4852 a better way of dealing with this, but for the moment (because 4.30 needs
4853 to be released), I have disabled address rewrite logging when running a
4854 filter in a non-root, non-exim process.
4860 1. The buildconfig auxiliary program wasn't quoting the value set for
4861 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4862 not defined. This bug was masked in 4.22 by the effect that was fixed in
4865 2. Some messages that were rejected after a message id was allocated were
4866 shown as "incomplete" by exigrep. It no longer does this for messages that
4867 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4869 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4870 have allow_domain_literals set, the ID did not get logged in the <= line.
4871 Domain literals are now always recognized in Message-ID: header lines.
4873 4. The first argument for a ${extract expansion item is the key name or field
4874 number. Leading and trailing spaces in this item were not being ignored,
4875 causing some misleading effects.
4877 5. When deliver_drop_privilege was set, single queue runner processes started
4878 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4879 same command in the process it spins off) were not dropping privilege.
4881 6. When the daemon running as "exim" started a queue runner, it always
4882 re-executed Exim in the spun-off process. This is a waste of effort when
4883 deliver_drop_privilege is set. The new process now just calls the
4884 queue-runner function directly.
4890 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4893 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4894 ignored. Though the use of -oP was forcing the writing of a pid file, it
4895 was always written to the default place.
4897 3. If the message "no IP address found for host xxxx" is generated during
4898 incoming verification, it is now followed by identification of the incoming
4899 connection (so you can more easily find what provoked it).
4901 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4903 5. Added some features to "harden" Exim a bit more against certain attacks:
4905 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4906 be put in Local/Makefile. This is like the never_users runtime option,
4907 but it cannot be overridden. The default setting is "root".
4909 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4910 prefix string with which any file named in a -C command line option
4913 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4914 is retained for -C and -D only if the caller of Exim is root. Without
4915 it, the exim user may also use -C and -D and retain privilege.
4917 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4918 command line option is disabled.
4920 6. Macro names set by the -D option must start with an upper case letter, just
4921 like macro names defined in the configuration file.
4923 7. Added "dereference=" facility to LDAP.
4925 8. Two instances of the typo "uknown" in the source files are fixed.
4927 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4928 the Configure-Makefile script screwed up while processing it.
4930 10. Incorporated PCRE 4.4.
4932 11. The SMTP synchronization check was not operating right at the start of an
4933 SMTP session. For example, it could not catch a HELO sent before the client
4934 waited for the greeting. There is now a check for outstanding input at the
4935 point when the greeting is written. Because of the duplex, asynchronous
4936 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4937 way, but not yet received, when the check is performed.
4939 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4940 on TCP/IP sockets, because this apparently causes some broken clients to
4943 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4944 unchanged) from the Cygwin maintainer.
4946 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4947 was supported instead of testing for mbx. Effectively a typo.
4949 15. The spa authenticator server code was not checking that the input it
4950 received was valid base64.
4952 16. The debug output line for the "set" modifier in ACLs was not showing the
4953 name of the variable that was being set.
4955 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4957 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4958 lookup on its own. Something else was needed to trigger the lookup. For
4959 example, a match in host_lookup or the need for a host name in a host list.
4960 Now, if $sender_host_name is referenced and the host name has not yet been
4961 looked up, a lookup is performed. If the lookup fails, the variable remains
4962 empty, and $host_lookup_failed is set to "1".
4964 19. Added "eqi" as a case-independent comparison operator.
4966 20. The saslauthd authentication condition could segfault if neither service
4967 nor realm was specified.
4969 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4970 error message that was logged was misleading, and incoming SMTP
4971 connections were dropped. The message is now more accurate, and temporary
4972 errors are given to SMTP connections.
4974 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4975 (except RSET) with a 421 error, until QUIT is received. However, it was
4976 failing to send a response to QUIT.
4978 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4979 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4980 ACL is now run after the helo_try_verify_hosts code.
4982 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4983 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4984 case-independent, so other case variants are also recognized). Apparently
4985 some systems use these upper case variants.
4987 25. If more than two messages were waiting for the same host, and a transport
4988 filter was specified for the transport, Exim sent two messages over the
4989 same TCP/IP connection, and then failed with "socket operation on non-
4990 socket" when it tried to send the third.
4992 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4994 27. The extern definition of crypt16() in expand.c was not being excluded when
4995 the OS had its own crypt16() function.
4997 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4998 as a preferred synonym for return_size_limit, both as an option and as an
5001 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5003 30. Changed the default configuration ACL to relax the local part checking rule
5004 for addresses that are not in any local domains. For these addresses,
5005 slashes and pipe symbols are allowed within local parts, but the sequence
5006 /../ is explicitly forbidden.
5008 31. SPA server authentication was not clearing the challenge buffer before
5011 32. log_message in a "warn" ACL statement was writing to the reject log as
5012 well as to the main log, which contradicts the documentation and doesn't
5013 seem right (because no rejection is happening). So I have stopped it.
5015 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5016 However, I am unable to do any testing of this.
5018 34. Fixed an infelicity in the appendfile transport. When checking directories
5019 for a mailbox, to see if any needed to be created, it was accidentally
5020 using path names with one or more superfluous leading slashes; tracing
5021 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5023 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5024 contents are added to the log line that is written for every discarded
5025 recipient. (Previously a log_message setting was ignored.)
5027 36. The ${quote: operator now quotes the string if it is empty.
5029 37. The install script runs exim in order to find its version number. If for
5030 some reason other than non-existence or emptiness, which it checks, it
5031 could not run './exim', it was installing it with an empty version number,
5032 i.e. as "exim-". This error state is now caught, and the installation is
5035 38. An argument was missing from the function that creates an error message
5036 when Exim fails to connect to the socket for saslauthd authentication.
5037 This could cause Exim to crash, or give a corrupted message.
5039 39. Added isip, isip4, and isip6 to ${if conditions.
5041 40. The ACL variables $acl_xx are now saved with the message, and can be
5042 accessed later in routers, transports, and filters.
5044 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5045 strings in the file are not string-expanded.
5047 42. If a MAIL command specified a SIZE value that was too large to fit into an
5048 int variable, the check against message_size_limit failed. Such values are
5049 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5050 day this will have to be increased, but I don't think I want to be around
5051 when emails are that large.
5058 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5059 iconv() is not standard in FreeBSD.
5061 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5062 IPv6 enabled. The observed symptom was a segmentation fault on return from
5063 the function os_common_find_running_interfaces() in src/os.c.
5065 3. In the check_special_case() function in daemon.c I had used "errno" as an
5066 argument name, which causes warnings on some systems. This was basically a
5067 typo, since it was named "eno" in the comments!
5069 4. The code that waits for the clock to tick (at a resolution of some fraction
5070 of a second) so as to ensure message-id uniqueness was always waiting for
5071 at least one whole tick, when it could have waited for less. [This is
5072 almost certainly not relevant at current processor speeds, where it is
5073 unlikely to ever wait at all. But we try to future-proof.]
5075 5. The function that sleeps for a time interval that includes fractions of a
5076 second contained a race. It did not block SIGALRM between setting the
5077 timer, and suspending (a couple of lines later). If the interval was short
5078 and the sigsuspend() was delayed until after it had expired, the suspension
5079 never ended. On busy systems this could lead to processes getting stuck for
5082 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5083 process, before it forks any delivery processes. The open lookup caching
5084 mechanism meant that the open file or database connection was passed into
5085 the delivery process. The problem was that delivery processes always tidy
5086 up cached lookup data. This could cause a problem for the next delivery
5087 process started by the queue runner, because the external queue runner
5088 process does not know about the closure. So the next delivery process
5089 still has data in the lookup cache. In the case of a file lookup, there was
5090 no problem because closing a file descriptor in a subprocess doesn't affect
5091 the parent. However, if the lookup was caching a connection to a database,
5092 the connection was closed, and the second delivery process was likely to
5093 see errors such as "PGSQL: query failed: server closed the connection
5094 unexpectedly". The problem has been fixed by closing all cached lookups
5095 in a queue runner before running a delivery process.
5097 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5098 seem to have the "const" qualifier which it has on other OS. I've
5101 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5102 *of the same type* (client or server) with the same public name that an
5103 error should be diagnosed.
5105 9. When Exim looked up a host name for an IP address, but failed to find the
5106 original IP address when looking up the host name (a safety check), it
5107 output the message "<ip address> does not match any IP for NULL", which was
5108 confusing, to say the least. The bug was that the host name should have
5109 appeared instead of "NULL".
5111 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5112 user that is built into the binary, and the -C or -D options is used, root
5113 privilege is dropped before the configuration file is read. In addition,
5114 logging is switched to stderr instead of the normal log files. If the
5115 configuration then re-defines the Exim user, the unprivileged environment
5116 is probably not what is expected, so Exim logs a panic warning message (but
5119 However, if deliver_drop_privilege is set, the unprivileged state may well
5120 be exactly what is intended, so the warning has been cut out in that case,
5121 and Exim is allowed to try to write to its normal log files.
5127 1. smtp_return_error_details was not giving details for temporary sender
5128 or receiver verification errors.
5130 2. Diagnose a configuration error if two authenticators have the same public
5133 3. Exim used not to create the message log file for a message until the first
5134 delivery attempt. This could be confusing when incoming messages were held
5135 for policy or load reasons. The message log file is now created at the time
5136 the message is received, and an initial "Received" line is written to it.
5138 4. The automatically generated man page for command line options had a minor
5139 bug that caused no ill effects; however, a more serious problem was that
5140 the procedure for building the man page automatically didn't always
5141 operate. Consequently, release 4.20 contains an out-of-date version. This
5142 shouldn't happen again.
5144 5. When building Exim with embedded Perl support, the script that builds the
5145 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5146 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5148 6. The freeze_tell option was not being used for messages that were frozen on
5149 arrival, either by an ACL or by local_scan().
5151 7. Added the smtp_incomplete_transaction log selector.
5153 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5154 was accepting AUTH without a new EHLO.
5156 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5157 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5160 10. Logging of TCP/IP connections (when configured) now happens in the main
5161 daemon process instead of the child process, so that the TCP/IP connection
5162 count is more accurate (but it can never be perfect).
5164 11. The use of "drop" in a nested ACL was not being handled correctly in the
5165 outer ACL. Now, if condition failure induced by the nested "drop" causes
5166 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5167 or "require"), the connection is dropped.
5169 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5170 that yield "discard" can now be used with an "accept" or a "discard" verb,
5171 but an error is generated for any others (because I can't see a useful way
5172 to define what should happen).
5174 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5175 are now processed in the same way as lines in the Exim configuration file.
5176 In particular, continuation lines are supported.
5178 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5180 15. Added -ti meaning -t -i.
5182 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5183 domains, and warn by logging if others are found.
5185 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5186 returned from GIFCONF when Exim is trying to find the list of interfaces on
5187 a host. The code in os.c has been modified to copy each ifreq to an aligned
5188 structure in all cases.
5190 Also, in some cases, the returned ifreq's were being copied to a 'struct
5191 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5192 means the last couple of bytes of an IPv6 address could be chopped if the
5193 ifreq contained only a normal sockaddr (14 bytes storage).
5195 18. Named domain lists were not supported in the hosts_treat_as_local option.
5196 An entry such as +xxxx was not recognized, and was treated as a literal
5199 19. Ensure that header lines added by a DATA ACL are included in the reject log
5200 if the ACL subsequently rejects the message.
5202 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5203 MD5 (which is deprecated).
5205 21. When testing a filter file using -bf, Exim was writing a message when it
5206 took the sender from a "From " line in the message, but it was not doing so
5207 when it took $return_path from a Return-Path: header line. It now does.
5209 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5210 with a valid header line field name (a series of printing characters
5211 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5213 23. Changed "disc" in the source to "disk" to conform to the documentation and
5214 the book and for uniformity.
5216 24. Ignore Sendmail's -Ooption=value command line item.
5218 25. When execve() failed while trying to run a command in a pipe transport,
5219 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5220 could be confused with a return value of 69 from the command itself. This
5221 has been changed to 127, the value the shell returns if it is asked to run
5222 a non-existent command. The wording for the related log line suggests a
5223 non-existent command as the problem.
5225 26. If received_header_text expands to an empty string, do not add a Received:
5226 header line to the message. (Well, it adds a token one on the spool, but
5227 marks it "old" so that it doesn't get used or transmitted.)
5229 27. Installed eximstats 1.28 (addition of -nt option).
5231 28. There was no check for failure on the call to getsockname() in the daemon
5232 code. This can fail if there is a shortage of resources on the system, with
5233 ENOMEM, for example. A temporary error is now given on failure.
5235 29. Contrary to the C standard, it seems that in some environments, the
5236 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5237 program. Exim now does this explicitly; it affects the formatting of
5238 timestamps using strftime().
5240 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5241 complaints. I've now initialized all the variables, to avoid this.
5243 32. Header lines added by a system filter were not being "seen" during
5244 transport-time rewrites.
5246 33. The info_callback() function passed to OpenSSL is set up with type void
5247 (*)(SSL *, int, int), as described somewhere. However, when calling the
5248 function (actually a macro) that sets it up, the type void(*)() is
5249 expected. I've put in a cast to prevent warnings from picky compilers.
5251 34. If a DNS black list lookup found a CNAME record, but there were no A
5252 records associated with the domain it pointed at, Exim crashed.
5254 35. If a DNS black list lookup returned more than one A record, Exim ignored
5255 all but the first. It now scans all returned addresses if a particular IP
5256 value is being sought. In this situation, the contents of the
5257 $dnslist_value variable are a list of all the addresses, separated by a
5260 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5261 to accept a host name and all its aliases if the forward lookup for any of
5262 them yielded the IP address of the incoming connection. Now it accepts only
5263 those names whose forward lookup yields the correct IP address. Any other
5264 names are discarded. This closes a loophole whereby a rogue DNS
5265 administrator could create reverse DNS records to break through a
5266 wildcarded host restriction in an ACL.
5268 37. If a user filter or a system filter that ran in a subprocess used any of
5269 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5270 the wrong values were passed to the pipe command ($thisaddress had the
5271 value of $0, $0 had the value of $1, etc). This bug was introduced by
5272 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5274 38. Improved the line breaking for long SMTP error messages from ACLs.
5275 Previously, if there was no break point between 40 and 75 characters, Exim
5276 left the rest of the message alone. Two changes have been made: (a) I've
5277 reduced the minimum length to 35 characters; (b) if it can't find a break
5278 point between 35 and 75 characters, it looks ahead and uses the first one
5279 that it finds. This may give the occasional overlong line, but at least the
5280 remaining text gets split now.
5282 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5283 file descriptors might be low, and that setting 1000 would always raise it.
5284 It turns out that in some environments, the limit is already over 1000 and
5285 that lowering it causes trouble. So now Exim takes care not to decrease it.
5287 40. When delivering a message, the value of $return_path is set to $sender_
5288 address at the start of routing (routers may change the value). By an
5289 oversight, this default was not being set up when an address was tested by
5290 -bt or -bv, which affected the outcome if any router or filter referred to
5293 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5294 log only when "message" or "log_message" are set. However, if one of the
5295 conditions was an address verification, or a call to a nested ACL, the
5296 messages generated by the underlying test were being passed through. This
5297 no longer happens. The underlying message is available in $acl_verify_
5298 message for both "message" and "log_message" expansions, so it can be
5299 passed through if needed.
5301 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5302 new expansion $bh_ to give the encoded byte string without charset
5303 translation. Translation happens only if iconv() is available; HAVE_ICONV
5304 indicates this at build time. HEADERS_CHARSET gives the charset to
5305 translate to; headers_charset can change it in the configuration, and
5306 "headers charset" can change it in an individual filter file.
5308 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5309 that creates RFC 2047 encoded "words" labels them as that charset instead
5310 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5311 expansion operator; (ii) when Exim creates a From: line for a local
5312 message; (iii) when a header line is rewritten to include a "phrase" part.
5314 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5315 buggy, causing it to skip the first lines of messages whose message ID
5316 ended in 'D'. This would not have bitten before Exim release 4.14, because
5317 message IDs were unlikely to end in 'D' before then. The effect was to have
5318 incorrect size information for certain domains.
5320 45. #include "config.h" was missing at the start of the crypt16.c module. This
5321 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5324 46. If there was a timeout during a "random" callout check, Exim treated it as
5325 a failure of the random address, and carried on sending RSET and the real
5326 address. If the delay was just some slowness somewhere, the response to the
5327 original RCPT would be taken as a response to RSET and so on, causing
5328 mayhem of various kinds.
5330 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5331 when I implemented it. It didn't allow for the fact that some option values
5332 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5333 the right test for positive values.
5335 48. Domain names in DNS records are case-independent. Exim always looks them up
5336 in lower case. Some resolvers return domain names in exactly the case they
5337 appear in the zone file, that is, they may contain uppercase letters. Not
5338 all resolvers do this - some return always lower case. Exim was treating a
5339 change of case by a resolver as a change of domain, similar to a widening
5340 of a domain abbreviation. This triggered its re-routing code and so it was
5341 trying to route what was effectively the same domain again. This normally
5342 caused routing to fail (because the router wouldn't handle the domain
5343 twice). Now Exim checks for this case specially, and just changes the
5344 casing of the domain that it ultimately uses when it transmits the message
5347 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5350 50. If a filter generated a file delivery with a non-absolute name (possible if
5351 no home directory exists for the router), the forbid_file option was not
5354 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5355 the existing equality matching.
5357 52. Exim was using ints instead of ino_t variables in some places where it was
5358 dealing with inode numbers.
5360 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5361 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5362 called TMPDIR, and if it finds it is different, it changes its value.
5364 54. The smtp_printf() function is now made available to local_scan() so
5365 additional output lines can be written before returning. There is also an
5366 smtp_fflush() function to enable the detection of a dropped connection.
5367 The variables smtp_input and smtp_batched_input are exported to
5370 55. Changed the default runtime configuration: the message "Unknown user"
5371 has been removed from the ACL, and instead placed on the localuser router,
5372 using the cannot_route_message feature. This means that any verification
5373 failures that generate their own messages won't get overridden. Similarly,
5374 the "Unrouteable address" message that was in the ACL for unverifiable
5375 relay addresses has also been removed.
5377 56. Added hosts_avoid_esmtp to the smtp transport.
5379 57. The exicyclog script was not checking for the esoteric option
5380 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5381 will work only if exicyclog is run under the appropriate euid.
5383 58. Following a discussion on the list, the rules by which Exim recognises line
5384 endings on incoming messages have been changed. The -dropcr and drop_cr
5385 options are now no-ops, retained only for backwards compatibility. The
5386 following line terminators are recognized: LF CRLF CR. However, special
5387 processing applies to CR:
5389 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5390 nor a local message in the state where . is a terminator.
5392 (ii) If a bare CR is encountered in a header line, an extra space is added
5393 after the line terminator so as not to end the header. The reasoning
5394 behind this is that bare CRs in header lines are most likely either
5395 to be mistakes, or people trying to play silly games.
5397 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5398 was being incorrectly given as 18 bytes larger than it should have been.
5399 This is a VOB (very old bug).
5401 60. This may never have affected anything current, but just in case it has:
5402 When the local host is found other than at the start of a list of hosts,
5403 the local host, those with the same MX, and any that follow, are discarded.
5404 When the list in question was part of a longer list of hosts, the following
5405 hosts (not currently being processed) were also being discarded. This no
5406 longer happens. I'm not sure if this situation could ever has previously
5409 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5412 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5413 header. This is something that is recommended in a new Internet Draft, and
5414 is something that is documented as being done by Sendmail. There are two
5415 possible values. For messages generated by the autoreply transport, Exim
5418 Auto-Submitted: auto-replied
5420 whereas for all other generated messages (e.g. bounces) it adds
5422 Auto-Submitted: auto-generated
5424 63. The "personal" condition in filters now includes a test for the
5425 Auto-Submitted: header. If it contains the string "auto-" the message it
5426 not considered personal.
5428 64. Added rcpt_include_affixes as a generic transport option.
5430 65. Added queue_only_override (default true).
5432 66. Added the syslog_duplication option.
5434 67. If what should have been the first header line of a message consisted of
5435 a space followed by a colon, Exim was mis-interpreting it as a header line.
5436 It isn't of course - it is syntactically invalid and should therefore be
5437 treated as the start of the message body. The misbehaviour could have
5438 caused a number of strange effects, including loss of data in subsequent
5439 header lines, and spool format errors.
5441 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5442 client host had authenticated. This control can now be exercised by an ACL
5443 for more flexibility.
5445 69. By default, callouts do not happen when testing with -bh. There is now a
5446 variant, -bhc, which does actually run the callout code, including
5447 consulting and updating the callout cache.
5449 70. Added support for saslauthd authentication, courtesy of Alexander
5452 71. If statvfs() failed on the spool or log directories while checking their
5453 size for availability, Exim confusingly gave the error "space shortage".
5454 Furthermore, in debugging mode it crashed with a floating point exception.
5455 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5456 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5457 serious problem, Exim now writes to the main and panic logs when this
5458 happens, with details of the failure. It then refuses to accept the
5459 incoming message, giving the message "spool directory problem" or "log
5460 directory problem" with a 421 code for SMTP messages.
5462 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5463 0, 1, and 2 exist, because some OS complain for execs without them (see
5464 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5465 descriptors. However, the code omitted to check that the open succeeded,
5466 causing mysterious errors if for some reason the permissions on /dev/null
5467 got screwed. Now Exim writes a message to the main and panic logs, and
5468 bombs out if it can't open /dev/null.
5470 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5471 interact so that it is all more flexible. It is supposed to remain
5472 backwards compatible. Also added extra_local_interfaces.
5474 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5475 to bomb out with an assertion failure - to the client this appears as a
5476 connection drop. This problem occurs in the part of the code that was taken
5477 from the Samba project. Fortunately, the assertion is in a very simple
5478 function, so I have fixed this by reproducing the function inline in the
5479 one place where it is called, and arranging for authentication to fail
5480 instead of killing the process with assert().
5482 75. The SPA client code was not working when the server requested OEM rather
5483 than Unicode encoding.
5485 76. Added code to make require_files with a specific uid setting more usable in
5486 the case where statting the file as root fails - usually a non-root-mounted
5487 NFS file system. When this happens and the failure is EACCES, Exim now
5488 forks a subprocess and does the per-uid checking as the relevant uid.
5490 77. Added process_log_path.
5492 78. If log_file_path was not explicitly set, a setting of check_log_space or
5493 check_log_inodes was ignored.
5495 79. If a space check for the spool or log partitions fails, the incident is now
5496 logged. Of course, in the latter case the data may get lost...
5498 80. Added the %p formatting code to string_format() so that it can be used to
5499 print addresses in debug_print(). Adjusted all the address printing in the
5500 debugging in store.c to use %p rather than %d.
5502 81. There was a concern that a line of code in smtp_in.c could overflow a
5503 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5504 initially expressed, the concern was not well-founded, because trailing
5505 spaces are removed early. However, if the trailing spaces were followed by
5506 a NULL, they did not get removed, so the overflow was possible. Two fixes
5509 (a) I re-wrote the offending code in a cleaner fashion.
5510 (b) If an incoming SMTP command contains a NULL character, it is rejected
5513 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5514 runs initgroups(), so that if the Exim user is in any additional groups,
5515 they will be used during message reception.
5521 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob