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.
40 PP/10 Added dbmjz lookup type.
46 PP/01 Solaris build fix for Oracle's LDAP libraries.
47 Bugzilla 1109, patch from Stephen Usher.
49 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
51 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
54 TF/02 Fix a couple more cases where we did not log the error message
55 when unlink() failed. See also change 4.74-TF/03.
57 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
58 lock up or crash if it happened to be inside a call to libc when it
59 got a SIGUSR1 from exiwhat.
61 The SIGUSR1 handler appends the current process status to the process
62 log which is later printed by exiwhat. It used to use the general
63 purpose logging code to do this, but several functions it calls are
66 The new output code in the SIGUSR1 handler is specific to the process
67 log, and simple enough that it's easy to inspect for signal safety.
68 Removing some special cases also simplifies the general logging code.
69 Removing the spurious timestamps from the process log simplifies
72 TF/04 Improved ratelimit ACL condition.
74 The /noupdate option has been deprecated in favour of /readonly which
75 has clearer semantics. The /leaky, /strict, and /readonly update modes
76 are mutually exclusive. The update mode is no longer included in the
77 database key; it just determines when the database is updated. (This
78 means that when you upgrde Exim will forget old rate measurements.)
80 Exim now checks that the per_* options are used with an update mode that
81 makes sense for the current ACL. For example, when Exim is processing a
82 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
83 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
84 must specify per_mail/readonly. If you omit the update mode it defaults to
85 /leaky where that makes sense (as before) or /readonly where required.
87 The /noupdate option is now undocumented but still supported for
88 backwards compatibility. It is equivalent to /readonly except that in
89 ACLs where /readonly is required you may specify /leaky/noupdate or
90 /strict/noupdate which are treated the same as /readonly.
92 A useful new feature is the /count= option. This is a generalization
93 of the per_byte option, so that you can measure the throughput of other
94 aggregate values. For example, the per_byte option is now equivalent
95 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
97 The per_rcpt option has been generalized using the /count= mechanism
98 (though it's more complicated than the per_byte equivalence). When it is
99 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
100 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
101 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
102 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
103 Note that using per_rcpt with a non-readonly update mode in more than
104 one ACL will cause the recipients to be double-counted. (The per_mail
105 and per_byte options don't have this problem.)
107 The handling of very low rates has changed slightly. If the computed rate
108 is less than the event's count (usually one) then this event is the first
109 after a long gap. In this case the rate is set to the same as this event's
110 count, so that the first message of a spam run is counted properly.
112 The major new feature is a mechanism for counting the rate of unique
113 events. The new per_addr option counts the number of different
114 recipients that someone has sent messages to in the last time period. It
115 behaves like per_rcpt if all the recipient addresses are different, but
116 duplicate recipient addresses do not increase the measured rate. Like
117 the /count= option this is a general mechanism, so the per_addr option
118 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
119 example, measure the rate that a client uses different sender addresses
120 with the options per_mail/unique=$sender_address. There are further
121 details in the main documentation.
123 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
125 TF/06 Removed a few PCRE remnants.
127 TF/07 Automatically extract Exim's version number from tags in the git
128 repository when doing development or release builds.
130 PP/02 Raise smtp_cmd_buffer_size to 16kB.
131 Bugzilla 879. Patch from Paul Fisher.
133 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
134 Heavily based on revision 40f9a89a from Simon Arlott's tree.
137 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
139 PP/05 Variable $av_failed, true if the AV scanner deferred.
140 Bugzilla 1078. Patch from John Horne.
142 PP/06 Stop make process more reliably on build failure.
143 Bugzilla 1087. Patch from Heiko Schlittermann.
145 PP/07 Make maildir_use_size_file an _expandable_ boolean.
146 Bugzilla 1089. Patch from Heiko Schlittermann.
148 PP/08 Handle ${run} returning more data than OS pipe buffer size.
149 Bugzilla 1131. Patch from Holger Weiß.
151 PP/09 Handle IPv6 addresses with SPF.
152 Bugzilla 860. Patch from Wolfgang Breyha.
154 PP/10 GnuTLS: support TLS 1.2 & 1.1.
156 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
159 PP/11 match_* no longer expand right-hand-side by default.
160 New compile-time build option, EXPAND_LISTMATCH_RHS.
161 New expansion conditions, "inlist", "inlisti".
163 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
165 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
167 PP/14 fix log_write() format string regression from TF/03.
168 Bugzilla 1152. Patch from Dmitry Isaikin.
174 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
176 PP/02 Harmonised TLS library version reporting; only show if debugging.
177 Layout now matches that introduced for other libraries in 4.74 PP/03.
179 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
181 PP/04 New "dns_use_edns0" global option.
183 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
186 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
187 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
189 TK/01 Updated PolarSSL code to 0.14.2.
190 Bugzilla 1097. Patch from Andreas Metzler.
192 PP/07 Catch divide-by-zero in ${eval:...}.
195 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
198 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
199 format-string attack -- SECURITY: remote arbitrary code execution.
201 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
202 time unintentionally subject to list matching rules, letting the header
203 cause arbitrary Exim lookups (of items which can occur in lists, *not*
204 arbitrary string expansion). This allowed for information disclosure.
206 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
207 INT_MIN/-1 -- value coerced to INT_MAX.
213 NM/01 Workround for PCRE version dependency in version reporting
216 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
217 This fixes portability to compilers other than gcc, notably
218 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
220 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
221 makefiles for portability to HP-UX and POSIX correctness.
223 PP/01 Permit LOOKUP_foo enabling on the make command-line.
224 Also via indented variable definition in the Makefile.
225 (Debugging by Oliver Heesakkers).
227 PP/02 Restore caching of spamd results with expanded spamd_address.
228 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
230 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
231 Improves build reliability. Fix from: Frank Elsner
233 NM/02 Fix wide character breakage in the rfc2047 coding
234 Fixes bug 1064. Patch from Andrey N. Oktyabrski
236 NM/03 Allow underscore in dnslist lookups
237 Fixes bug 1026. Patch from Graeme Fowler
239 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
240 Code patches from Adam Ciarcinski of NetBSD.
242 NM/04 Fixed exiqgrep to cope with mailq missing size issue
245 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
246 is logged, to avoid truncation. Patch from John Horne.
248 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
249 Patch from Jakob Hirsch.
251 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
252 SQL string expansion failure details.
253 Patch from Andrey Oktyabrski.
255 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
256 Patch from Simon Arlott.
258 PP/09 New lookups functionality failed to compile on old gcc which rejects
259 extern declarations in function scope.
260 Patch from Oliver Fleischmann
262 PP/10 Use sig_atomic_t for flags set from signal handlers.
263 Check getgroups() return and improve debugging.
264 Fixed developed for diagnosis in bug 927 (which turned out to be
267 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
268 Patch from Mark Zealey.
270 PP/12 Bugzilla 1056: Improved spamd server selection.
271 Patch from Mark Zealey.
273 PP/13 Bugzilla 1086: Deal with maildir quota file races.
274 Based on patch from Heiko Schlittermann.
276 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
277 Patch from Uwe Doering, sign-off by Michael Haardt.
279 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
280 variable declaration deep within a block. Bug and patch from
283 PP/15 lookups-Makefile IRIX compatibilty coercion.
285 PP/16 Make DISABLE_DKIM build knob functional.
287 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
288 Patch by Simon Arlott
290 TF/03 Fix valgrind.h portability to C89 compilers that do not support
291 variable argument macros. Our copy now differs from upstream.
297 TF/01 Failure to get a lock on a hints database can have serious
298 consequences so log it to the panic log.
300 TF/02 Log LMTP confirmation messages in the same way as SMTP,
301 controlled using the smtp_confirmation log selector.
303 TF/03 Include the error message when we fail to unlink a spool file.
305 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
306 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
307 for maintaining out-of-tree patches for some time.
309 PP/01 Bugzilla 139: Documentation and portability issues.
310 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
311 Handle per-OS dynamic-module compilation flags.
313 PP/02 Let /dev/null have normal permissions.
314 The 4.73 fixes were a little too stringent and complained about the
315 permissions on /dev/null. Exempt it from some checks.
316 Reported by Andreas M. Kirchwitz.
318 PP/03 Report version information for many libraries, including
319 Exim version information for dynamically loaded libraries. Created
320 version.h, now support a version extension string for distributors
321 who patch heavily. Dynamic module ABI change.
323 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
324 privilege escalation vulnerability whereby the Exim run-time user
325 can cause root to append content of the attacker's choosing to
328 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
331 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
332 If dropping privileges for untrusted macros, we disabled normal logging
333 on the basis that it would fail; for the Exim run-time user, this is not
334 the case, and it resulted in successful deliveries going unlogged.
335 Fixed. Reported by Andreas Metzler.
341 PP/01 Date: & Message-Id: revert to normally being appended to a message,
342 only prepend for the Resent-* case. Fixes regression introduced in
343 Exim 4.70 by NM/22 for Bugzilla 607.
345 PP/02 Include check_rfc2047_length in configure.default because we're seeing
346 increasing numbers of administrators be bitten by this.
348 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
350 PP/03 Bugzilla 994: added openssl_options main configuration option.
352 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
354 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
356 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
358 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
359 without a peer certificate, leading to a segfault because of an
360 assumption that peers always have certificates. Be a little more
361 paranoid. Problem reported by Martin Tscholak.
363 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
364 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
365 NB: ClamAV planning to remove STREAM in "middle of 2010".
366 CL also introduces -bmalware, various -d+acl logging additions and
367 more caution in buffer sizes.
369 PP/09 Implemented reverse_ip expansion operator.
371 PP/10 Bugzilla 937: provide a "debug" ACL control.
373 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
375 PP/12 Bugzilla 973: Implement --version.
377 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
379 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
381 PP/15 Bugzilla 816: support multiple condition rules on Routers.
383 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
384 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
385 ignore trailing whitespace.
387 JJ/02 prevent non-panic DKIM error from being sent to paniclog
389 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
392 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
393 Notification from Dr Andrew Aitchison.
395 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
396 ExtendedDetectionInfo response format.
397 Notification from John Horne.
399 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
402 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
403 XSL and documented dependency on system catalogs, with examples of how
406 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
409 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
410 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
411 configuration file which is writeable by the Exim user or group.
413 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
414 of configuration files to cover files specified with the -C option if
415 they are going to be used with root privileges, not just the default
418 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
419 option (effectively making it always true).
421 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
422 files to be used while preserving root privileges.
424 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
425 that rogue child processes cannot use them.
427 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
428 run-time user, instead of root.
430 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
431 Exim run-time user without dropping privileges.
433 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
434 result string, instead of calling string_vformat() twice with the same
437 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
438 for other users. Others should always drop root privileges if they use
439 -C on the command line, even for a whitelisted configure file.
441 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
443 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
449 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
450 $data_path, and $header_path variables; fixed documentation bugs and
453 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
454 exipick to access non-standard spools, including the "frozen" queue
457 NM/01 Bugzilla 965: Support mysql stored procedures.
458 Patch from Alain Williams
460 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
462 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
463 Patch from Andreas Metzler
465 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
466 Patch from Kirill Miazine
468 NM/05 Bugzilla 671: Added umask to procmail example.
470 JJ/03 installed exipick 20100323.0, fixing doc bug
472 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
473 directory. Notification and patch from Dan Rosenberg.
475 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
477 TK/02 Improve log output when DKIM signing operation fails.
479 MH/01 Treat the transport option dkim_domain as a colon separated
480 list, not as a single string, and sign the message with each element,
481 omitting multiple occurences of the same signer.
483 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
484 Bugzilla 985, 986. Patch by Simon Arlott
486 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
487 Patch by Simon Arlott
489 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
490 MBX locking. Notification from Dan Rosenberg.
496 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
498 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
500 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
502 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
504 NM/04 Bugzilla 915: Flag broken perl installation during build.
510 TK/01 Added patch by Johannes Berg that expands the main option
511 "spamd_address" if it starts with a dollar sign.
513 TK/02 Write list of recipients to X-Envelope-Sender header when building
514 the mbox-format spool file for content scanning (suggested by Jakob
517 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
518 (http://www.dcc-servers.net/) support via dccifd. Activated by
519 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
521 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
522 by Mark Daniel Reidel <mr@df.eu>.
524 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
525 When building exim an external PCRE library is now needed -
526 PCRE is a system library on the majority of modern systems.
527 See entry on PCRE_LIBS in EDITME file.
529 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
530 conversation. Added nologin parameter to request.
531 Patch contributed by Kirill Miazine.
533 TF/01 Do not log submission mode rewrites if they do not change the address.
535 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
537 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
538 log files in place. Contributed by Roberto Lima.
540 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
542 TF/03 Bugzilla 615: When checking the local_parts router precondition
543 after a local_part_suffix or local_part_prefix option, Exim now
544 does not use the address's named list lookup cache, since this
545 contains cached lookups for the whole local part.
547 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
548 Robert Millan. Documentation is in experimental-spec.txt.
550 TF/04 Bugzilla 668: Fix parallel build (make -j).
552 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
554 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
555 Patch provided by Jan Srzednicki.
557 TF/05 Leading white space used to be stripped from $spam_report which
558 wrecked the formatting. Now it is preserved.
560 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
561 that they are available at delivery time.
563 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
565 TF/08 TLS error reporting now respects the incoming_interface and
566 incoming_port log selectors.
568 TF/09 Produce a more useful error message if an SMTP transport's hosts
569 setting expands to an empty string.
571 NM/06 Bugzilla 744: EXPN did not work under TLS.
572 Patch provided by Phil Pennock.
574 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
575 Patch provided by Richard Godbee.
577 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
578 acl_smtp_notquit, added index entry.
580 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
581 Patch provided by Eugene Bujak.
583 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
584 accept(). Patch provided by Maxim Dounin.
586 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
587 Patch provided by Phil Pennock.
589 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
591 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
592 Patch provided by Brad "anomie" Jorsch.
594 NM/14 Bugzilla 622: Added timeout setting to transport filter.
595 Patch provided by Dean Brooks.
597 TK/05 Add native DKIM support (does not depend on external libraries).
599 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
600 Patch provided by Graeme Fowler.
602 NM/16 Bugzilla 851: Documentation example syntax fix.
604 NM/17 Changed NOTICE file to remove references to embedded PCRE.
606 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
609 NM/19 Bugzilla 745: TLS version reporting.
610 Patch provided by Phil Pennock.
612 NM/20 Bugzilla 167: bool: condition support.
613 Patch provided by Phil Pennock.
615 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
616 clients. Patch provided by Phil Pennock.
618 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
619 Patch provided by Brad "anomie" Jorsch.
621 NM/23 Bugzilla 687: Fix misparses in eximstats.
622 Patch provided by Heiko Schlittermann.
624 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
625 Patch provided by Heiko Schlittermann.
627 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
628 plus update to original patch.
630 NM/26 Bugzilla 799: Documentation correction for ratelimit.
632 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
633 Patch provided by David Brownlee.
635 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
637 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
639 NM/30 Bugzilla 888: TLS documentation bugfixes.
641 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
643 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
644 Unlike the original bugzilla I have changed all shell scripts in src tree.
646 NM/33 Bugzilla 898: Transport filter timeout fix.
647 Patch by Todd Rinaldo.
649 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
650 Patch by Serge Demonchaux.
652 NM/35 Bugzilla 39: Base64 decode bug fixes.
653 Patch by Jakob Hirsch.
655 NM/36 Bugzilla 909: Correct connect() call in dcc code.
657 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
659 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
661 NM/39 Bugzilla 911: Fixed MakeLinks build script.
667 TK/01 Add preliminary DKIM support. Currently requires a forked version of
668 ALT-N's libdkim that I have put here:
669 http://duncanthrax.net/exim-experimental/
671 Note to Michael Haardt: I had to rename some vars in sieve.c. They
672 were called 'true' and it seems that C99 defines that as a reserved
673 keyword to be used with 'bool' variable types. That means you could
674 not include C99-style headers which use bools without triggering
675 build errors in sieve.c.
677 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
678 as mailq or other aliases. Changed the --help handling significantly
679 to do whats expected. exim_usage() emits usage/help information.
681 SC/01 Added the -bylocaldomain option to eximstats.
683 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
685 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
687 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
693 PH/01 Another patch from the Sieve maintainer.
695 PH/02 When an IPv6 address is converted to a string for single-key lookup
696 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
697 dots are used instead of colons so that keys in lsearch files need not
698 contain colons. This was done some time before quoting was made available
699 in lsearch files. However, iplsearch files do require colons in IPv6 keys
700 (notated using the quote facility) so as to distinguish them from IPv4
701 keys. This meant that lookups for IP addresses in host lists did not work
702 for iplsearch lookups.
704 This has been fixed by arranging for IPv6 addresses to be expressed with
705 colons if the lookup type is iplsearch. This is not incompatible, because
706 previously such lookups could never work.
708 The situation is now rather anomolous, since one *can* have colons in
709 ordinary lsearch keys. However, making the change in all cases is
710 incompatible and would probably break a number of configurations.
712 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
715 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
716 conversion specification without a maximum field width, thereby enabling
717 a rogue spamd server to cause a buffer overflow. While nobody in their
718 right mind would setup Exim to query an untrusted spamd server, an
719 attacker that gains access to a server running spamd could potentially
720 exploit this vulnerability to run arbitrary code as the Exim user.
722 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
723 $primary_hostname instead of what libspf2 thinks the hosts name is.
725 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
726 a directory entry by the name of the lookup key. Previously, if a
727 symlink pointed to a non-existing file or a file in a directory that
728 Exim lacked permissions to read, a lookup for a key matching that
729 symlink would fail. Now it is enough that a matching directory entry
730 exists, symlink or not. (Bugzilla 503.)
732 PH/03 The body_linecount and body_zerocount variables are now exported in the
735 PH/04 Added the $dnslist_matched variable.
737 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
738 This means they are set thereafter only if the connection becomes
741 PH/06 Added the client_condition to authenticators so that some can be skipped
742 by clients under certain conditions.
744 PH/07 The error message for a badly-placed control=no_multiline_responses left
745 "_responses" off the end of the name.
747 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
749 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
750 (without spaces) instead of just copying the configuration text.
752 PH/10 Added the /noupdate option to the ratelimit ACL condition.
754 PH/11 Added $max_received_linelength.
756 PH/12 Added +ignore_defer and +include_defer to host lists.
758 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
759 way in which PCRE > 7.0 is built.
761 PH/14 Implemented queue_only_load_latch.
763 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
764 MAIL command. The effect was to mangle the value on 64-bit systems.
766 PH/16 Another patch from the Sieve maintainer.
768 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
770 PH/18 If a system quota error occurred while trying to create the file for
771 a maildir delivery, the message "Mailbox is full" was not appended to the
772 bounce if the delivery eventually timed out. Change 4.67/27 below applied
773 only to a quota excession during the actual writing of the file.
775 PH/19 It seems that peer DN values may contain newlines (and other non-printing
776 characters?) which causes problems in log lines. The DN values are now
777 passed through string_printing() before being added to log lines.
779 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
780 and InterBase are left for another time.)
782 PH/21 Added message_body_newlines option.
784 PH/22 Guard against possible overflow in moan_check_errorcopy().
786 PH/23 POSIX allows open() to be a macro; guard against that.
788 PH/24 If the recipient of an error message contained an @ in the local part
789 (suitably quoted, of course), incorrect values were put in $domain and
790 $local_part during the evaluation of errors_copy.
796 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
797 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
800 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
801 issue a MAIL command.
803 PH/02 In an ACL statement such as
805 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
807 if a client was not listed at all, or was listed with a value other than
808 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
809 the condition was not true (as it should be), so access was not denied.
810 The bug was that the ! inversion was incorrectly passed on to the second
811 item. This has been fixed.
813 PH/03 Added additional dnslists conditions == and =& which are different from
814 = and & when the dns lookup returns more than one IP address.
816 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
817 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
819 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
820 FSYNC, which compiles an option called disable_fsync that allows for
821 bypassing fsync(). The documentation is heavily laced with warnings.
823 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
825 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
826 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
827 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
828 including adding "make clean"; (3) Added -fPIC when compiling the test
829 dynamically loaded module, to get rid of a warning.
831 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
832 message fails, move_frozen_messages = true and ignore_bounce_errors_after
833 = 0s. The bug is otherwise harmless.
835 PH/07 There was a bug in the dovecot authenticator such that the value of
836 $auth1 could be overwritten, and so not correctly preserved, after a
837 successful authentication. This usually meant that the value preserved by
838 the server_setid option was incorrect.
840 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
842 PH/09 Installed PCRE release 7.0.
844 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
845 run for batched SMTP input. It is now run at the start of every message
846 in the batch. While fixing this I discovered that the process information
847 (output by running exiwhat) was not always getting set for -bs and -bS
848 input. This is fixed, and it now also says "batched" for BSMTP.
850 PH/11 Added control=no_pipelining.
852 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
853 patch, slightly modified), and move the expansion of helo_data till after
854 the connection is made in the smtp transport (so it can use these
857 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
859 PH/14 Added log_selector = +pid.
861 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
863 PH/16 Add ${if forany and ${if forall.
865 PH/17 Added dsn_from option to vary the From: line in DSNs.
867 PH/18 Flush SMTP output before performing a callout, unless control =
868 no_callout_flush is set.
870 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
871 was true (the default) a successful delivery failed to delete the retry
872 item, thus causing premature timeout of the address. The bug is now
875 PH/20 Added hosts_avoid_pipelining to the smtp transport.
877 PH/21 Long custom messages for fakedefer and fakereject are now split up
878 into multiline reponses in the same way that messages for "deny" and
879 other ACL rejections are.
881 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
882 with slight modification.
884 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
885 draft, changing the syntax and factoring some duplicate code".
887 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
888 for deliveries of the second and subsequent messages over the same SMTP
891 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
892 ${reduce, with only minor "tidies".
894 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
896 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
897 expansion side effects.
899 PH/27 When a message times out after an over-quota error from an Exim-imposed
900 quota, the bounce message says "mailbox is full". This message was not
901 being given when it was a system quota that was exceeded. It now should
904 MH/03 Made $recipients available in local_scan(). local_scan() already has
905 better access to the recipient list through recipients_list[], but
906 $recipients can be useful in postmaster-provided expansion strings.
908 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
909 in the case of a MAIL command with additional options following the
910 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
911 were accidentally chopped off.
913 PH/29 SMTP synchronization checks are implemented when a command is read -
914 there is a check that no more input is waiting when there shouldn't be
915 any. However, for some commands, a delay in an ACL can mean that it is
916 some time before the response is written. In this time, more input might
917 arrive, invalidly. So now there are extra checks after an ACL has run for
918 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
919 pipelining has not been advertised.
921 PH/30 MH's patch to allow iscntrl() characters to be list separators.
923 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
924 returned in the SMTP response when smtp_return_error_details was false.
927 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
928 instead of the C I/O that was originally supplied, because problems were
931 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
932 Exim which did not show up earlier: it was assuming that a call to
933 SSL_CTX_set_info_callback() might give an error value. In fact, there is
934 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
935 was a macro that became an assignment, so it seemed to work. This has
936 changed to a proper function call with a void return, hence the compile
937 error. Exim's code has been fixed.
939 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
942 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
944 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
946 PH/37 If a message is not accepted after it has had an id assigned (e.g.
947 because it turns out to be too big or there is a timeout) there is no
948 "Completed" line in the log. When some messages of this type were
949 selected by exigrep, they were listed as "not completed". Others were
950 picked up by some special patterns. I have improved the selection
951 criteria to be more general.
953 PH/38 The host_find_failed option in the manualroute router can now be set
954 to "ignore", to completely ignore a host whose IP address cannot be
955 found. If all hosts are ignored, the behaviour is controlled by the new
956 host_all_ignored option.
958 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
959 homing or because of multiple MX records with /mx) generated more than
960 one IP address, and the following item turned out to be the local host,
961 all the secondary addresses of the first item were incorrectly removed
962 from the list, along with the local host and any following hosts (which
963 is what is supposed to happen).
965 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
966 whoever called Exim into the -H file. In the case of the daemon it was
967 behaving confusingly. When first started, it used values for whoever
968 started the daemon, but after a SIGHUP it used the Exim user (because it
969 calls itself on a restart). I have changed the code so that it now always
972 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
973 message are rejected with the same error (e.g. no authentication or bad
974 sender address), and a DATA command is nevertheless sent (as can happen
975 with PIPELINING or a stupid MUA), the error message that was given to the
976 RCPT commands is included in the rejection of the DATA command. This is
977 intended to be helpful for MUAs that show only the final error to their
980 PH/42 Another patch from the Sieve maintainer.
982 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
983 Eximstats - Fixed some broken HTML links and added missing column headers
985 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
986 columns for Rejects, Temp Rejects, Ham, and Spam rows.
988 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
990 PH/43 Yet another patch from the Sieve maintainer.
992 PH/44 I found a way to check for a TCP/IP connection going away before sending
993 the response to the final '.' that terminates a message, but only in the
994 case where the client has not sent further data following the '.'
995 (unfortunately, this is allowed). However, in many cases there won't be
996 any further data because there won't be any more messages to send. A call
997 to select() can be used: if it shows that the input is "ready", there is
998 either input waiting, or the socket has been closed. An attempt to read
999 the next input character can distinguish the two cases. Previously, Exim
1000 would have sent an OK response which the client would never have see.
1001 This could lead to message repetition. This fix should cure that, at
1002 least in a lot of common cases.
1004 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1005 advertised in response to EHLO.
1011 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1012 fixed by 4.65/MH/01 (is this a record?) are fixed:
1014 (i) An empty string was always treated as zero by the numeric comparison
1015 operators. This behaviour has been restored.
1017 (ii) It is documented that the numeric comparison operators always treat
1018 their arguments as decimal numbers. This was broken in that numbers
1019 starting with 0 were being interpreted as octal.
1021 While fixing these problems I realized that there was another issue that
1022 hadn't been noticed. Values of message_size_limit (both the global option
1023 and the transport option) were treated as octal if they started with 0.
1024 The documentation was vague. These values are now always treated as
1025 decimal, and I will make that clear in the documentation.
1031 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1032 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1035 MH/01 Don't check that the operands of numeric comparison operators are
1036 integers when their expansion is in "skipping" mode (fixes bug
1037 introduced by 4.64-PH/07).
1039 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1040 child addresses, Exim now panics and dies. Previously, because the count
1041 is held in a short int, deliveries were likely to be lost. As such a
1042 large number of recipients for a single message is ridiculous
1043 (performance will be very, very poor), I have chosen to impose a limit
1044 rather than extend the field.
1050 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1051 leftover -K file (the existence of which was triggered by #402).
1052 While we were at it, introduced process PID as part of the -K
1053 filename. This should rule out race conditions when creating
1056 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1057 processing considerably. Previous code took too long for large mails,
1058 triggering a timeout which in turn triggers #401.
1060 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1061 in the DK code in transports.c. sendfile() is not really portable,
1062 hence the _LINUX specificness.
1064 TF/01 In the add_headers option to the mail command in an Exim filter,
1065 there was a bug that Exim would claim a syntax error in any
1066 header after the first one which had an odd number of characters
1069 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1070 callout verification, Exim cached a "reject" for the entire domain. This
1071 is correct for most verifications, but it is not correct for a recipient
1072 verification with use_sender or use_postmaster set, because in that case
1073 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1074 case of MAIL FROM:<> rejection from other early rejections (e.g.
1075 rejection of HELO). When verifying a recipient using a non-null MAIL
1076 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1077 Whatever the result of the callout, the value of the domain cache is
1078 left unchanged (for any other kind of callout, getting as far as trying
1079 RCPT means that the domain itself is ok).
1081 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1084 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1085 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1086 session, the daemon ignores ECONNECT errors and logs others; it now
1087 ignores EPIPE as well.
1089 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1090 (quoted-printable decoding).
1092 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1093 later the small subsequent patch to fix an introduced bug.
1095 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1097 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1099 PH/08 An error is now given if message_size_limit is specified negative.
1101 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1102 to be given (somewhat) arbitrary names.
1104 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1107 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1108 miscellaneous code fixes
1110 PH/10 Added the log_reject_target ACL modifier to specify where to log
1113 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1114 hostname. This is wrong, because it relates to the incoming message (and
1115 probably the interface on which it is arriving) and not to the outgoing
1116 callout (which could be using a different interface). This has been
1117 changed to use the value of the helo_data option from the smtp transport
1118 instead - this is what is used when a message is actually being sent. If
1119 there is no remote transport (possible with a router that sets up host
1120 addresses), $smtp_active_hostname is used.
1122 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1123 tweaks were necessary in order to get it to work (see also 21 below):
1124 (a) The code assumed that strncpy() returns a negative number on buffer
1125 overflow, which isn't the case. Replaced with Exim's string_format()
1127 (b) There were several signed/unsigned issues. I just did the minimum
1128 hacking in of casts. There is scope for a larger refactoring.
1129 (c) The code used strcasecmp() which is not a standard C function.
1130 Replaced with Exim's strcmpic() function.
1131 (d) The code set only $1; it now sets $auth1 as well.
1132 (e) A simple test gave the error "authentication client didn't specify
1133 service in request". It would seem that Dovecot has changed its
1134 interface. Fortunately there's a specification; I followed it and
1135 changed what the client sends and it appears to be working now.
1137 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1140 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1141 address A is aliased to B and C, where B exists and C does not. Without
1142 -v the output is "A verified" because verification stops after a
1143 successful redirection if more than one address is generated. However,
1144 with -v the child addresses are also verified. Exim was outputting "A
1145 failed to verify" and then showing the successful verification for C,
1146 with its parentage. It now outputs "B failed to verify", showing B's
1147 parentage before showing the successful verification of C.
1149 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1150 look up a TXT record in a specific list after matching in a combined
1153 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1154 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1155 they consult the DNS. I had assumed they would set it the way they
1156 wanted; and indeed my experiments on Linux seem to show that in some
1157 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1158 To be on the safe side, however, I have now made the interface to
1159 host_find_byname() similar to host_find_bydns(), with an argument
1160 containing the DNS resolver options. The host_find_byname() function now
1161 sets these options at its start, just as host_find_bydns() does. The smtp
1162 transport options dns_qualify_single and dns_search_parents are passed to
1163 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1164 of host_find_byname() use the default settings of RES_DEFNAMES
1165 (qualify_single) but not RES_DNSRCH (search_parents).
1167 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1168 spool_read_header() do less string testing, by means of a preliminary
1169 switch on the second character of optional "-foo" lines. (This is
1170 overdue, caused by the large number of possibilities that now exist.
1171 Originally there were few.) While I was there, I also converted the
1172 str(n)cmp tests so they don't re-test the leading "-" and the first
1173 character, in the hope this might squeeze out yet more improvement.
1175 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1176 flag allowing group syntax was set by the header_syntax check but not
1177 turned off, possible causing trouble later; (2) The flag was not being
1178 set at all for the header_verify test, causing "group"-style headers to
1179 be rejected. I have now set it in this case, and also caused header_
1180 verify to ignore an empty address taken from a group. While doing this, I
1181 came across some other cases where the code for allowing group syntax
1182 while scanning a header line wasn't quite right (mostly, not resetting
1183 the flag correctly in the right place). These bugs could have caused
1184 trouble for malformed header lines. I hope it is now all correct.
1186 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1187 with the "reply" argument non-NULL. The code, however (which originally
1188 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1189 but it didn't always do it. This confused somebody who was copying the
1190 code for some other use. I have removed all the tests.
1192 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1193 feature that was used to support insecure browsers during the U.S. crypto
1194 embargo. It requires special client support, and Exim is probably the
1195 only MTA that supported it -- and would never use it because real RSA is
1196 always available. This code has been removed, because it had the bad
1197 effect of slowing Exim down by computing (never used) parameters for the
1198 RSA_EXPORT functionality.
1200 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1201 authenticator to fail if there's a tab character in the incoming data
1202 (there should never be unless someone is messing about, as it's supposed
1203 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1204 if the connection is using TLS or if the remote IP is the same as the
1205 local IP, and the "valid-client-cert option" if a client certificate has
1208 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1209 authenticators. This can be used for authorization after authentication
1210 succeeds. (In the case of plaintext, it servers for both authentication
1213 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1214 if any retry times were supplied.
1216 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1217 connection, where there is no client IP address to check. In this
1218 situation, the verify now always succeeds.
1220 PH/25 Applied John Jetmore's -Mset patch.
1222 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1224 PH/27 In a string expansion for a processed (not raw) header when multiple
1225 headers of the same name were present, leading whitespace was being
1226 removed from all of them, but trailing whitespace was being removed only
1227 from the last one. Now trailing whitespace is removed from each header
1228 before concatenation. Completely empty headers in a concatenation (as
1229 before) are ignored.
1231 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1232 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1234 PH/29 [Removed. This was a change that I later backed out, and forgot to
1235 correct the ChangeLog entry (that I had efficiently created) before
1236 committing the later change.]
1238 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1239 address errors (4xx response to RCPT) over the same connection as other
1240 messages routed to the same hosts. Such deliveries are always "forced",
1241 so retry times are not inspected. This resulted in far too many retries
1242 for the affected addresses. The effect occurred only when there were more
1243 hosts than the hosts_max_try setting in the smtp transport when it had
1244 the 4xx errors. Those hosts that it had tried were not added to the list
1245 of hosts for which the message was waiting, so if all were tried, there
1246 was no problem. Two fixes have been applied:
1248 (i) If there are any address or message errors in an SMTP delivery, none
1249 of the hosts (tried or untried) are now added to the list of hosts
1250 for which the message is waiting, so the message should not be a
1251 candidate for sending over the same connection that was used for a
1252 successful delivery of some other message. This seems entirely
1253 reasonable: after all the message is NOT "waiting for some host".
1254 This is so "obvious" that I'm not sure why it wasn't done
1255 previously. Hope I haven't missed anything, but it can't do any
1256 harm, as the worst effect is to miss an optimization.
1258 (ii) If, despite (i), such a delivery is accidentally attempted, the
1259 routing retry time is respected, so at least it doesn't keep
1260 hammering the server.
1262 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1263 in ${readsocket because some servers need this prod.
1265 PH/32 Added some extra debug output when updating a wait-xxx database.
1267 PH/33 The hint "could be header name not terminated by colon", which has been
1268 given for certain expansion errors for a long time, was not being given
1269 for the ${if def:h_colon_omitted{... case.
1271 PH/34 The spec says: "With one important exception, whenever a domain list is
1272 being scanned, $domain contains the subject domain." There was at least
1273 one case where this was not true.
1275 PH/35 The error "getsockname() failed: connection reset by peer" was being
1276 written to the panic log as well as the main log, but it isn't really
1277 panic-worthy as it just means the connection died rather early on. I have
1278 removed the panic log writing for the ECONNRESET error when getsockname()
1281 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1282 runs only) independently of the message's sender address. This meant
1283 that, if the 4xx error was in fact related to the sender, a different
1284 message to the same recipient with a different sender could confuse
1285 things. In particualar, this can happen when sending to a greylisting
1286 server, but other circumstances could also provoke similar problems.
1287 I have changed the default so that the retry time for these errors is now
1288 based a combination of the sender and recipient addresses. This change
1289 can be overridden by setting address_retry_include_sender=false in the
1292 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1293 remote server are returned as part of bounce messages. This was not
1294 happening for LMTP over a pipe (the lmtp transport), but now it is the
1295 same for both kinds of LMTP.
1297 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1298 in header lines that were in fact CNAMEs. This is no longer the case.
1300 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1301 and queue runs started by the daemon processed all messages. This has
1302 been fixed so that -R and -S can now usefully be given with -q<time>.
1304 PH/40 Import PCRE release 6.7 (fixes some bugs).
1306 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1308 PH/42 Give an error if -q is specified more than once.
1310 PH/43 Renamed the variables $interface_address and $interface_port as
1311 $received_ip_address and $received_port, to make it clear that these
1312 values apply to message reception, and not to the outgoing interface when
1313 a message is delivered. (The old names remain recognized, of course.)
1315 PH/44 There was no timeout on the connect() call when using a Unix domain
1316 socket in the ${readsocket expansion. There now is.
1318 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1319 be meaningful with "accept".
1321 SC/01 Eximstats V1.43
1322 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1324 SC/02 Eximstats V1.44
1325 Use a glob alias rather than an array ref in the generated
1326 parser. This improves both readability and performance.
1328 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1329 Collect SpamAssassin and rejection statistics.
1330 Don't display local sender or destination tables unless
1331 there is data to show.
1332 Added average volumes into the top table text output.
1334 SC/04 Eximstats V1.46
1335 Collect data on the number of addresses (recipients)
1336 as well as the number of messages.
1338 SC/05 Eximstats V1.47
1339 Added 'Message too big' to the list of mail rejection
1340 reasons (thanks to Marco Gaiarin).
1342 SC/06 Eximstats V1.48
1343 Mainlog lines which have GMT offsets and are too short to
1344 have a flag are now skipped.
1346 SC/07 Eximstats V1.49 (Alain Williams)
1347 Added the -emptyok flag.
1349 SC/08 Eximstats V1.50
1350 Fixes for obtaining the IP address from reject messages.
1352 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1353 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1354 whitesspace changes from 4.64-PH/27
1356 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1359 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1360 are found, allow negative numbers in numeric criteria)
1362 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1364 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1365 to match changes made in 4.64-PH/43
1367 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1369 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1370 "domain" is actually an IP address, and force a failure. This locks out
1371 those revolvers/nameservers that support "A-for-A" lookups, in
1372 contravention of the specifications.
1374 PH/48 When a host name was looked up from an IP address, and the subsequent
1375 forward lookup of the name timed out, the host name was left in
1376 $sender_host_name, contrary to the specification.
1378 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1379 restricted to single-key lookups, Exim was not diagnosing an error if
1380 * or *@ was used with a query-style lookup.
1382 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1384 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1385 long ago, but noone interested enough thought of it. Let's just say that
1386 the "1.1" means that there are some new functions that weren't there at
1387 some point in the past.
1389 PH/51 Error processing for expansion failure of helo_data from an smtp
1390 transport during callout processing was broken.
1392 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1393 tested/used via the -bh/-bhc/-bs options.
1395 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1396 bug, fixed in subsequent PCRE releases).
1398 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1399 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1401 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1407 SC/01 Use a glob alias rather than an array ref in eximstats generated
1408 parser. This improves both readability and performance.
1410 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1411 Don't display local sender or destination tables in eximstats unless
1412 there is data to show.
1413 Added average volumes into the eximstats top table text output.
1415 SC/03 Collect data on the number of addresses (recipients) as well
1416 as the number of messages in eximstats.
1418 TF/01 Correct an error in the documentation for the redirect router. Exim
1419 does (usually) call initgroups() when daemonizing.
1421 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1422 with consistent privilege compared to when running as a daemon.
1424 TF/03 Note in the spec that $authenticated_id is not set for local
1425 submissions from trusted users.
1427 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1428 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1430 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1431 by adding some example configuration directives to the default
1432 configuration file. A little bit of work is required to uncomment the
1433 directives and define how usernames and passwords are checked, but
1434 there is now a framework to start from.
1436 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1437 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1438 without this. I don't know how relevant this is to other LDAP libraries.
1440 PH/02 Add the verb name to the "unknown ACL verb" error.
1442 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1444 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1446 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1447 directory not expanded when it should be if an expanded home directory
1448 was set for the address (which is overridden by the transport).
1450 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1453 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1454 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1455 because it is too late at that time, and has no effect.
1457 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1458 security issue with \' (bugzilla #107). I could not use the
1459 PQescapeStringConn() function, because it needs a PGconn value as one of
1462 PH/08 When testing addresses using -bt, indicate those final addresses that
1463 are duplicates that would not cause an additional delivery. At least one
1464 person was confused, thinking that -bt output corresponded to deliveries.
1465 (Suppressing duplicates isn't a good idea as you lose the information
1466 about possibly different redirections that led to the duplicates.)
1468 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1469 systems where poll() doesn't work, in particular OS X.
1471 PH/10 Added more information to debugging output for retry time not reached.
1473 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1474 operations in malware.c.
1476 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1479 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1480 syslog_duplication set false, log lines that would normally be written
1481 both the the main log and to the reject log were not written to syslog at
1484 PH/14 In the default configuration, change the use of "message" in ACL warn
1485 statements to "add_header".
1487 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1488 not followed by a command (e.g. "seen endif").
1490 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1491 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1494 PH/17 Added extra conditions to the default value of delay_warning_condition
1498 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1499 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1500 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1503 The Auto-Submitted: and various List- headers are standardised, whereas I
1504 don't think Precedence: ever was.
1506 PH/18 Refactored debugging code in route_finduser() to show more information,
1507 in particular, the error code if getpwnam() issues one.
1509 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1510 This is apparently needed in addition to the PH/07 change above to avoid
1511 any possible encoding problems.
1513 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1514 but not after initializing Perl.
1516 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1517 output them only if debugging. By default they are written stderr,
1518 apparently, which is not desirable.
1520 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1523 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1526 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1528 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1529 authenticated or an ident call has been made. Suppress the default
1530 values for $authenticated_id and $authenticated_sender (but permit -oMai
1531 and -oMas) when testing with -bh.
1533 PH/24 Re-jigged the order of the tests in the default configuration so that the
1534 tests for valid domains and recipients precede the DNS black list and CSA
1535 tests, on the grounds that those ones are more expensive.
1537 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1538 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1539 This bug exists in every version of Exim that I still have, right back to
1542 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1543 However, an attempt to turn on case-sensitivity in a regex key by
1544 including (?-i) didn't work because the subject string was already
1545 lowercased, and the effects were non-intuitive. It turns out that a
1546 one-line patch can be used to allow (?-i) to work as expected.
1552 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1553 other effects) broke the use of negated acl sub-conditions.
1555 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1558 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1559 "Deny" causes Exim to reject the incoming connection with a 554 error.
1560 Unfortunately, if there is a major crisis, such as a disk failure,
1561 tcp-wrappers gives "deny", whereas what one would like would be some
1562 kind of temporary error. A kludge has been added to help with this.
1563 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1564 554 error is used if errno is still zero or contains ENOENT (which occurs
1565 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1568 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1570 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1571 errors. Otherwise a message that provokes a temporary error (when other
1572 messages do not) can cause a whole host to time out.
1574 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1575 addresses were routed directly to files or pipes from a redirect router.
1576 File deliveries just didn't batch; pipe deliveries might have suffered
1579 PH/06 A failure to get a lock for a hints database would erroneously always say
1580 "Failed to get write lock", even when it was really a read lock.
1582 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1583 of 0600. This has been changed to use the value of the lockfile_mode
1584 option (which defaults to 0600).
1586 PH/08 Applied small patch from the Sieve maintainer.
1588 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1589 folder from quota calculations, a direct delivery into this folder messed
1590 up the contents of the maildirsize file. This was because the regex was
1591 used only to exclude .Trash (or whatever) when the size of the mailbox
1592 was calculated. There was no check that a delivery was happening into an
1593 excluded directory. This bug has been fixed by ignoring all quota
1594 processing for deliveries into excluded directories.
1596 PH/10 Added the maildirfolder_create_regex option to appendfile.
1602 PH/01 The code for finding all the local interface addresses on a FreeBSD
1603 system running IPv6 was broken. This may well have applied to all BSD
1604 systems, as well as to others that have similar system calls. The broken
1605 code found IPv4 interfaces correctly, but gave incorrect values for the
1606 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1607 that it would not match correctly against @[] and not recognize the IPv6
1610 PH/02 The ipliteral router was not recognizing addresses of the form user@
1611 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1613 PH/03 Added disable_ipv6.
1615 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1616 decoded form, because it is most often used to construct To: headers
1617 lines in autoreplies, and the decoded form may well be syntactically
1618 invalid. However, $reply_address has leading white space removed, and all
1619 newlines turned into spaces so that the autoreply transport does not
1622 PH/05 If group was specified without a user on a router, and no group or user
1623 was specified on a transport, the group from the router was ignored.
1625 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1626 for visible compile-time settings that can be used to change these
1627 numbers, for those that want even more. Backwards compatibility with old
1628 spool files has been maintained. However, going back to a previous Exim
1629 release will lost any variables that are in spool files.
1631 PH/07 Two small changes when running in the test harness: increase delay when
1632 passing a TCP/IP connection to a new process, in case the original
1633 process has to generate a bounce, and remove special handling of
1634 127.0.0.2 (sic), which is no longer necessary.
1636 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1637 be the same on different OS.
1639 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1642 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1643 whether --show-vars was specified or not
1645 JJ/02 exipick: Added support for new ACL variable spool format introduced
1648 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1649 syntactically invalid From: or Reply-to: line, and a filter used this to
1650 generate an autoreply, and therefore failed to obtain an address for the
1651 autoreply, Exim could try to deliver to a non-existent relative file
1652 name, causing unrelated and misleading errors. What now happens is that
1653 it logs this as a hard delivery error, but does not attempt to create a
1656 PH/11 The exinext utility has a -C option for testing purposes, but although
1657 the given file was scanned by exinext itself; it wasn't being passed on
1658 when Exim was called.
1660 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1661 an end-of-file indication when reading a command response.
1663 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1664 compiled. In many other places in Exim, IPv6 addresses are always
1665 recognized, so I have changed this. It also means that IPv4 domain
1666 literals of the form [IPV4:n.n.n.n] are now always recognized.
1668 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1669 used if the router is not running as root, for example, when verifying at
1670 ACL time, or when using -bh. The debugging output from this situation was
1671 non-existent - all you got was a failure to exec. I have made two
1674 (a) Failures to set uid/gid, the current directory, or a process leader
1675 in a subprocess such as that created by queryprogram now generate
1676 suitable debugging ouput when -d is set.
1678 (b) The queryprogram router detects when it is not running as root,
1679 outputs suitable debugging information if -d is set, and then runs
1680 the subprocess without attempting to change uid/gid.
1682 PH/15 Minor change to Makefile for building test_host (undocumented testing
1685 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1686 additional section of a DNS packet that returns MX or SRV records.
1687 Instead, it always explicitly searches for A/AAAA records. This avoids
1688 major problems that occur when a DNS server includes only records of one
1689 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1690 fixed another bug: if SRV records were looked up and the corresponding
1691 address records were *not* found in the additional section, the port
1692 values from the SRV records were lost.
1694 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1695 using the correct key (the original address) when searching the retry
1696 rules in order to find which one to use for generating the retry hint.
1698 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1699 adding the default one. Similarly, if it contains a Reply-To: header, the
1700 errors_reply_to option, if set, is not used.
1702 PH/19 When calculating a retry time, Exim used to measure the "time since
1703 failure" by looking at the "first failed" field in the retry record. Now
1704 it does not use this if it is later than than the arrival time of the
1705 message. Instead it uses the arrival time. This makes for better
1706 behaviour in cases where some deliveries succeed, thus re-setting the
1707 "first failed" field. An example is a quota failure for a huge message
1708 when small messages continue to be delivered. Without this change, the
1709 "time since failure" will always be short, possible causing more frequent
1710 delivery attempts for the huge message than are intended.
1711 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1713 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1714 $1, $2, $3) because the numerical variables can be reset during some
1715 expansion items (e.g. "match"), thereby losing the authentication data.
1717 PH/21 Make -bV show the size of off_t variables so that the test suite can
1718 decide whether to run tests for quotas > 2G.
1720 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1721 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1722 filecount value is greater than 2G or if a quota value is greater than 2G
1723 on a system where the size of off_t is not greater than 4, a panic error
1726 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1727 never match. The debug and -bh output now contains an explicit error
1728 message indicating a malformed IPv4 address or mask.
1730 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1731 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1732 PH/23 above applies.
1734 PH/25 Do not write to syslog when running in the test harness. The only
1735 occasion when this arises is a failure to open the main or panic logs
1736 (for which there is an explicit test).
1738 PH/26 Added the /no_tell option to "control=freeze".
1740 PH/27 If a host name lookup failed very early in a connection, for example, if
1741 the IP address matched host_lookup and the reverse lookup yielded a name
1742 that did not have a forward lookup, an error message of the form "no IP
1743 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1744 could be logged. Now it outputs the IP address instead of "NULL".
1746 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1747 allows the sender and the authenticated sender to be set when
1748 submitting a message from within Exim. Since child_open_exim() is
1749 documented for local_scan(), the new function should be too.
1751 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1752 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1753 results in an empty string is now treated as unset.
1755 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1757 PH/31 Added sender_verify_fail logging option.
1759 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1760 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1761 tidied the source and removed it altogether.
1763 PH/33 When a queue run was abandoned because the load average was too high, a
1764 log line was always written; now it is written only if the queue_run log
1765 selector is set. In addition, the log line for abandonment now contains
1766 information about the queue run such as the pid. This is always present
1767 in "start" and "stop" lines but was omitted from the "abandon" line.
1769 PH/34 Omit spaces between a header name and the colon in the error message that
1770 is given when verify = headers_syntax fails (if there are lots of them,
1771 the message gets confusing).
1773 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1774 names, as there are now some PTR records that contain slashes. This check
1775 is only to protect against broken name servers that fall over on strange
1776 characters, so the fact that it applies to all lookups doesn't matter.
1778 PH/36 Now that the new test suite is complete, we can remove some of the
1779 special code in Exim that was needed for the old test suite. For example,
1780 sorting DNS records because real resolvers return them in an arbitrary
1781 order. The new test suite's fake resolver always returns records in the
1784 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1785 bounces) except when queue_only is set, to avoid logging races between
1786 the different processes.
1788 PH/38 Panic-die if .include specifies a non-absolute path.
1790 PH/39 A tweak to the "H" retry rule from its user.
1792 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1793 a label. They prevented compilation on older perls.
1795 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1796 a warning to be raised on newish perls.
1798 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1799 on queue. Changes to match documented behaviour of showing count of
1800 messages matching specified criteria.
1802 PH/40 Changed the default ident timeout from 30s to 5s.
1804 PH/41 Added support for the use of login_cap features, on those BSD systems
1805 that have them, for controlling the resources used by pipe deliveries.
1807 PH/42 The content-scanning code uses fopen() to create files in which to put
1808 message data. Previously it was not paying any attention to the mode of
1809 the files. Exim runs with umask(0) because the rest of the code creates
1810 files with open(), and sets the required mode explicitly. Thus, these
1811 files were ending up world-writeable. This was not a big issue, because,
1812 being within the spool directory, they were not world-accessible. I have
1813 created a function called modefopen, which takes an additional mode
1814 argument. It sets umask(777), creates the file, chmods it to the required
1815 mode, then resets the umask. All the relevant calls to fopen() in the
1816 content scanning code have been changed to use this function.
1818 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1819 to 24 hours. This avoids potential overflow problems when processing G
1820 and H retry rules. I suspect nobody ever tinkers with this value.
1822 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1824 PH/45 When the plaintext authenticator is running as a client, the server's
1825 challenges are checked to ensure they are valid base64 strings. By
1826 default, the authentication attempt is cancelled if an invalid string is
1827 received. Setting client_ignore_invalid_base64 true ignores these errors.
1828 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1829 they are received. Thus, the responses can be made to depend on the
1830 challenges. If an invalid string is ignored, an empty string is placed in
1833 PH/46 Messages that are created by the autoreply transport now contains a
1834 References: header, in accordance with RFCs 2822 and 3834.
1836 PH/47 Added authenticated_sender_force to the smtp transport.
1838 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1840 PH/49 Installed latest patch from the Sieve maintainer.
1842 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1843 was also set, the appendfile transport was unnecessarily scanning a
1844 directory of message files (e.g. for maildir delivery) to find the count
1845 of files (along with the size), even though it did not need this
1846 information. It now does the scan only if it needs to find either the
1847 size of the count of files.
1849 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1851 PH/52 Two bugs concerned with error handling when the smtp transport is
1854 (i) Exim was not creating retry information for temporary errors given
1855 for individual recipients after the DATA command when the smtp transport
1856 was used in LMTP mode. This meant that they could be retried too
1857 frequently, and not timed out correctly.
1859 (ii) Exim was setting the flag that allows error details to be returned
1860 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1861 recipients that were returned after the DATA command.
1863 PH/53 This is related to PH/52, but is more general: for any failing address,
1864 when detailed error information was permitted to be returned to the
1865 sender, but the error was temporary, then after the final timeout, only
1866 "retry timeout exceeded" was returned. Now it returns the full error as
1867 well as "retry timeout exceeded".
1869 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1870 do this, and (what is worse) MTAs that accept it.
1872 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1873 will now be deprecated.
1875 PH/56 New os.c-cygwin from the Cygwin maintainer.
1877 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1878 formats (previously only available in exim formats via -bpr, -bpru,
1879 and -bpra. Now also available in native and exiqgrep formats)
1881 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1882 with very large, slow to parse queues
1884 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1886 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1888 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1889 responses to authentication challenges, though it was showing the
1890 challenges; (ii) I've removed the CR characters from the debug output for
1893 PH/58 Allow for the insertion of a newline as well as a space when a string
1894 is turned into more than one encoded-word during RFC 2047 encoding. The
1895 Sieve code now uses this.
1897 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1898 data_4xx, lost_connection, tls_required.
1900 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1901 message was being sent as an SMTP response.
1903 PH/61 Add -l and -k options to exicyclog.
1905 PH/62 When verifying, if an address was redirected to one new address, so that
1906 verification continued, and the new address failed or deferred after
1907 having set something in $address_data, the value of $address_data was not
1908 passed back to the ACL. This was different to the case when no
1909 redirection occurred. The value is now passed back in both cases.
1911 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1912 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1913 use login_cap.h, so on its own it isn't the distinguishing feature. The
1914 new name refers directly to the setclassresources() function.
1916 PH/65 Added configuration files for NetBSD3.
1918 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1920 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1921 is preferred over IPv4.
1923 PH/68 The bounce_return_message and bounce_return_body options were not being
1924 honoured for bounces generated during the reception of non-SMTP messages.
1925 In particular, this applied to messages rejected by the ACL. This bug has
1926 been fixed. However, if bounce_return_message is true and bounce_return_
1927 body is false, the headers that are returned for a non-SMTP message
1928 include only those that have been read before the error was detected.
1929 (In the case of an ACL rejection, they have all been read.)
1931 PH/69 The HTML version of the specification is now built in a directory called
1932 spec_html instead of spec.html, because the latter looks like a path with
1933 a MIME-type, and this confuses some software.
1935 PH/70 Catch two compiler warnings in sieve.c.
1937 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1938 function verify_get_ident() calls ip_connect() to connect a socket, but
1939 if the "connect()" function timed out, ip_connect() used to close the
1940 socket. However, verify_get_ident() also closes the socket later, and in
1941 between Exim writes to the log, which may get opened at this point. When
1942 the socket was closed in ip_connect(), the log could get the same file
1943 descriptor number as the socket. This naturally causes chaos. The fix is
1944 not to close the socket in ip_connect(); the socket should be closed by
1945 the function that creates it. There was only one place in the code where
1946 this was missing, in the iplookup router, which I don't think anybody now
1947 uses, but I've fixed it anyway.
1949 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1950 well as to direct DNS lookups. Otherwise the handling of names in host
1951 lists is inconsistent and therefore confusing.
1957 PH/01 Two changes to the default runtime configuration:
1959 (1) Move the checks for relay_from_hosts and authenticated clients from
1960 after to before the (commented out) DNS black list checks.
1962 (2) Add control=submission to the relay_from_hosts and authenticated
1963 clients checks, on the grounds that messages accepted by these
1964 statements are most likely to be submissions.
1966 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1968 (1) Generate an error if the third argument for the ${prvs expansion is
1971 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1974 (3) Reset the variables that are obtained from the first argument of
1975 ${prvscheck and used in the second argument before leaving the code,
1976 because their memory is reclaimed, so using them afterwards may do
1979 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1980 one (it's much easier than Tom thought :-).
1982 (5) Because of (4), we can now allow for the use of $prvscheck_result
1983 inside the third argument.
1985 PH/03 For some reason, the default setting of PATH when running a command from
1986 a pipe transport was just "/usr/bin". I have changed it to
1989 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1990 anything to be listed in the output from -bV.
1992 PH/05 When a filter generated an autoreply, the entire To: header line was
1993 quoted in the delivery log line, like this:
1995 => >A.N.Other <ano@some.domain> <original@ddress> ...
1997 This has been changed so that it extracts the operative address. There
1998 may be more than one such address. If so, they are comma-separated, like
2001 => >ano@some.domain,ona@other.domain <original@ddress> ...
2003 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2004 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2005 not being looked up in the rDNS to get a host name, Exim was showing the
2006 IP address twice in Received: lines, even though the IP addresses were
2007 identical. For example:
2009 Received: from [1.2.3.4] (helo=[1.2.3.4])
2011 However, if the real host name was known, it was omitting the HELO data
2012 if it matched the actual IP address. This has been tidied up so that it
2013 doesn't show the same IP address twice.
2015 PH/07 When both +timestamp and +memory debugging was on, the value given by
2016 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2017 called by the debug printing, thereby overwriting the timestamp buffer.
2018 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2020 PH/08 When the original message was included in an autoreply transport, it
2021 always said "this is a copy of the message, including all the headers",
2022 even if body_only or headers_only was set. It now gives an appropriate
2025 PH/09 Applied a patch from the Sieve maintainer which:
2027 o fixes some comments
2028 o adds the (disabled) notify extension core
2029 o adds some debug output for the result of if/elsif tests
2030 o points to the current vacation draft in the documentation
2031 and documents the missing references header update
2035 o fixes a bug in processing the envelope test (when testing
2036 multiple envelope elements, the last element determinted the
2039 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2040 Electronic Mail") by including:
2042 Auto-submitted: auto-generated
2044 in the messages that it generates (bounce messages and others, such as
2045 warnings). In the case of bounce messages for non-SMTP mesages, there was
2046 also a typo: it was using "Auto_submitted" (underscore instead of
2047 hyphen). Since every message generated by Exim is necessarily in response
2048 to another message, thes have all been changed to:
2050 Auto-Submitted: auto-replied
2052 in accordance with these statements in the RFC:
2054 The auto-replied keyword:
2056 - SHOULD be used on messages sent in direct response to another
2057 message by an automatic process,
2059 - MUST NOT be used on manually-generated messages,
2061 - MAY be used on Delivery Status Notifications (DSNs) and Message
2062 Disposition Notifications (MDNs),
2064 - MUST NOT be used on messages generated by automatic or periodic
2065 processes, except for messages which are automatic responses to
2068 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2069 to the default Received: header definition.
2071 PH/12 Added log selector acl_warn_skipped (default on).
2073 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2074 variables because (a) they are in the wrong storage pool and (b) even if
2075 they were copied, it wouldn't work properly because of the caching.
2077 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2078 checking when decoding. Apparently there are clients that generate
2079 overlong encoded strings. Why am I not surprised?
2081 PH/15 If the first argument of "${if match_address" was not empty, but did not
2082 contain an "@" character, Exim crashed. Now it writes a panic log message
2083 and treats the condition as false.
2085 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2087 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2088 extension "envelope-auth". The code is finished and in agreement with
2089 other implementations, but there is no documentation so far and in fact,
2090 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2091 not changing the active code.
2093 Print executed "if" and "elsif" statements when debugging is used. This
2094 helps a great deal to understand what a filter does.
2096 Document more things not specified clearly in RFC3028. I had all this
2097 sorted out, when out of a sudden new issues came to my mind. Oops."
2099 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2102 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2103 canonical form (as documented). However, after a host name lookup from
2104 the IP address, check_host() was doing a simple string comparison with
2105 addresses acquired from the DNS when checking that the found name did
2106 have the original IP as one of its addresses. Since any found IPv6
2107 addresses are likely to be in abbreviated form, the comparison could
2108 fail. Luckily, there already exists a function for doing the comparison
2109 by converting both addresses to binary, so now that is used instead of
2110 the text comparison.
2112 PH/20 There was another similar case to PH/19, when a complete host name was
2113 given in a host list; looking up its IP address could give an abbreviated
2114 form, whereas the current host's name might or might not be abbreviated.
2115 The same fix has been applied.
2121 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2122 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2125 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2126 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2128 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2130 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2131 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2132 Also, for "Auto-Submitted", treat anything other than "no" as
2133 non-personal, in accordance with RFC 3834. (Previously it treated
2134 anything starting "auto-" as non-personal.)
2136 TF/01 The control=submission/name=... option had a problem with syntax
2137 errors if the name included a slash character. The /name= option
2138 now slurps the rest of the string, so it can include any characters
2139 but it must come last in the list of options (after /sender_retain
2142 PH/05 Some modifications to the interface to the fake nameserver for the new
2150 TK/01 Added the "success_on_redirect" address verification option. See
2151 NewStuff for rationale and an example.
2153 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2155 PH/02 Patch to exigrep to allow it to work on syslog lines.
2157 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2158 fread() to skip over the body file's header line, because in Cygwin the
2159 header line is locked and is inaccessible.
2161 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2162 co-exist for some time) to make it clear that it is the Exim ID that is
2163 referenced, not the Message-ID: header line.
2165 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2166 string_format() function, because snprintf() does not exist on all
2169 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2170 ${stat: expansion item.
2172 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2173 protocol synchronization error", to keep the pedants happy.
2175 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2176 well as for IRIX systems, when gcc is being used. See the host.c source
2179 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2181 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2184 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2185 transport and to the smtp transport in LMTP mode.
2187 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2189 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2190 run a filter in a subprocess. This could lead to confusion in subsequent
2191 lookups in the parent process. There should also be a search_tidyup() at
2192 the end of the subprocess.
2194 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2195 only if the host matched helo_try_verify_hosts, which caused the
2196 verification to occur when the EHLO/HELO command was issued. The ACL just
2197 tested the remembered result. Now, if a previous verification attempt has
2198 not happened, "verify = helo" does it there and then.
2200 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2202 TK/03 Fix log output including CR from clamd.
2204 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2205 exist provoked a memory error which could cause a segfault.
2207 PH/15 Installed PCRE 6.2
2209 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2211 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2212 of the problem. Specifically, suggested +O2 rather than +O1 for the
2215 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2217 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2218 record, the port was not correctly logged when the outgoing_port log
2219 selector was set (it logged the transort's default port).
2221 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2222 fallback_hosts, and "hosts" in the smtp transport.
2224 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2225 host errors such as "Connection refused".
2227 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2228 authentication with radiusclient 0.4.9:
2230 - Error returned from rc_read_config was caught wrongly
2231 - Username/password not passed on to radius server due to wrong length.
2233 The presumption is that some radiusclient API changes for 4.51/PH/17
2234 were not taken care of correctly. The code is still untested by me (my
2235 Linux distribution still has 0.3.2 of radiusclient), but it was
2236 contributed by a Radius user.
2238 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2239 expanding the "port" option of the smtp transport.
2241 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2242 while reading a MIME header. Thanks to Tom Hughes for a patch.
2244 PH/24 Include config.h inside local_scan.h so that configuration settings are
2247 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2248 that in an ACL for RCPT (for example), you can examine exactly what was
2251 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2252 commands, but it was not correctly comparing the address with the actual
2253 client host address. Thus, it would show the EHLO address in Received:
2254 header lines when this was not necessary.
2256 PH/27 Added the % operator to ${eval:}.
2258 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2259 it should be ignoring failures (because with -C, for example, it has lost
2260 privilege). It wasn't ignoring creation failures other than "already
2263 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2266 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2267 because an input line was too long, either on its own, or by virtue of
2268 too many continuations, the temporary file was not being removed, and the
2269 return code was incorrect.
2271 PH/31 Missing "BOOL" in function definition in filtertest.c.
2273 PH/32 Applied Sieve patches from the maintainer.
2275 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2277 PH/33 Added "verify = not_blind".
2279 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2280 Local/Makefile (with some defaults set). These are used in built scripts
2281 such as exicyclog, but they have never been used in the exim_install
2282 script (though there are many overriding facilities there). I have
2283 arranged that the exim_install script now takes note of these two
2286 PH/35 Installed configuration files for Dragonfly.
2288 PH/36 When a locally submitted message by a trusted user did not contain a
2289 From: header, and the sender address was obtained from -f or from an SMTP
2290 MAIL command, and the trusted user did not use -F to supply a sender
2291 name, $originator_name was incorrectly used when constructing a From:
2292 header. Furthermore, $originator_name was used for submission mode
2293 messages from external hosts without From: headers in a similar way,
2294 which is clearly wrong.
2296 PH/37 Added control=suppress_local_fixups.
2298 PH/38 When log_selector = +received_sender was set, and the addition of the
2299 sender made the log line's construction buffer exactly full, or one byte
2300 less than full, an overflow happened when the terminating "\n" was
2303 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2304 when the result of a list match is failure because a DNS lookup failed.
2306 PH/40 RM_COMMAND is now used in the building process.
2308 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2309 the "build-* directories that it finds.
2311 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2312 address in a domain literal was a prefix of an interface address.
2314 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2315 when verifying a sender address, unless rewrite_headers is false.
2317 PH/44 Wrote a long comment about why errors_to addresses are verified as
2318 recipients, not senders.
2320 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2321 the ratelimit ACL was added.
2323 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2325 PH/46 Added extra information about PostgreSQL errors to the error string.
2327 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2328 avoiding the need to install special zones in a real server. This is
2329 backwards compatible; if it can't find the fake resolver, it drops back.
2330 Thus, both old and new test suites can be run.
2332 TF/02 Added util/ratelimit.pl
2334 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2335 clock is set back in time.
2337 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2338 Candler <B.Candler@pobox.com>.
2340 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2341 OK for addresses that are the result of redirections.
2343 PH/48 A number of further additions for the benefit of the new test suite,
2344 including a fake gethostbyname() that interfaces to the fake DNS resolver
2347 TF/06 The fix for widen_domains has also been applied to qualify_single and
2348 search_parents which are the other dnslookup options that can cause
2351 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2354 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2356 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2357 service" if it encountered an MX record with an empty target hostname.
2358 The message is now "an MX or SRV record indicated no SMTP service".
2360 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2361 if the DNS of the sending site is misconfigured. This is quite a
2362 common situation. This change restores the behaviour of treating a
2363 helo verification defer as a failure.
2365 PH/51 If self=fail was set on a router, the bounce message did not include the
2366 actual error message.
2372 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2374 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2375 command itself ended in error, the underlying message about the transport
2376 filter timeout was being overwritten with the pipe command error. Now the
2377 underlying error message should be appended to the second error message.
2379 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2381 PH/02 Reduce the amount of output that "make" produces by default. Full output
2382 can still be requested.
2384 PH/03 The warning log line about a condition test deferring for a "warn" verb
2385 was being output only once per connection, rather than after each
2386 occurrence (because it was using the same function as for successful
2387 "warn" verbs). This seems wrong, so I have changed it.
2389 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2390 it should not have, which might have caused a crash in the right
2391 circumstances, but probably never did.
2393 PH/04 Installed a modified version of Tony Finch's patch to make submission
2394 mode fix the return path as well as the Sender: header line, and to
2395 add a /name= option so that you can make the user's friendly name appear
2398 TF/03 Added the control = fakedefer ACL modifier.
2400 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2401 Mark Lowes for thorough testing.
2403 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2405 TK/03 Merged latest SRS patch from Miles Wilton.
2407 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2408 with the definition in sysexits.h (which is #included earlier).
2409 Fortunately, Exim does not actually use EX_OK. The code used to try to
2410 preserve the sysexits.h value, by assumimg that macro definitions were
2411 scanned for macro replacements. I have been disabused of this notion,
2412 so now the code just undefines EX_OK before #including unistd.h.
2414 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2415 in the smtp transport. When a block could not be written in a single
2416 write() function, the timeout was being re-applied to each part-write.
2417 This seems wrong - if the receiver was accepting one byte at a time it
2418 would take for ever. The timeout is now adjusted when this happens. It
2419 doesn't have to be particularly precise.
2421 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2422 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2424 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2425 without a domain if the check to <postmaster@domain> fails.
2427 SC/01 Eximstats: added -xls and the ability to specify output files
2428 (patch written by Frank Heydlauf).
2430 SC/02 Eximstats: use FileHandles for outputing results.
2432 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2434 SC/04 Eximstats: fixed display of large numbers with -nvr option
2436 SC/05 Eximstats: fixed merging of reports with empty tables.
2438 SC/06 Eximstats: added the -include_original_destination flag
2440 SC/07 Eximstats: removed tabs and trailing whitespace.
2442 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2444 TK/06 MBOX spool code: Add real "From " MBOX separator line
2445 so the .eml file is really in mbox format (even though
2446 most programs do not really care). Patch from Alex Miller.
2448 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2449 The latter is generated from $received_to and is only set if the
2450 message has one envelope recipient. SA can use these headers,
2451 obviously out-of-the-box. Patch from Alex Miller.
2453 PH/08 The ${def test on a variable was returning false if the variable's
2454 value was "0", contrary to what the specification has always said!
2455 The result should be true unless the variable is empty.
2457 PH/09 The syntax error of a character other than { following "${if
2458 def:variable_name" (after optional whitespace) was not being diagnosed.
2459 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2460 accidental colon was present, for example, could give incorrect results.
2462 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2463 result is used (not including appendfile, where other changes are about
2466 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2467 This involved changing a lot of size variables from int to off_t. It
2468 should work with maildirs and everything.
2470 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2471 spamd dying while we are connected to it.
2473 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2476 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2477 function for BDB 4.3.
2479 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2481 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2482 the sources for PCRE have been re-arranged and more files are now
2485 PH/15 The code I had for printing potentially long long variables in PH/11
2486 above was not the best (it lost precision). The length of off_t variables
2487 is now inspected at build time, and an appropriate printing format (%ld
2488 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2489 to be "long long int" or "long int". This is needed for the internal
2490 formatting function string_vformat().
2492 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2493 the configuration file to be ":syslog", then the script "guesses" where
2494 the logs files are, rather than using the compiled in default. In our
2495 case the guess is not the same as the compiled default, so the script
2496 suddenly stopped working when I started to use syslog. The patch checks
2497 to see if log_file_path is "". If so, it attempts to read it from exim
2498 with no configuration file to get the compiled in version, before it
2499 falls back to the previous guessing code."
2501 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2502 implementing BATV in an Exim configuration. See NewStuff for the gory
2505 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2506 Makefile that are specific to HP-UX.
2508 PH/18 If the "use_postmaster" option was set for a recipient callout together
2509 with the "random" option, the postmaster address was used as the MAIL
2510 FROM address for the random test, but not for the subsequent recipient
2511 test. It is now used for both.
2513 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2514 patch removes a few documentation additions to RFC 3028, because the
2515 latest draft now contains them. It adds the new en;ascii-case comparator
2516 and a new error check for 8bit text in MIME parts. Comparator and
2517 require names are now matched exactly. I enabled the subaddress
2518 extension, but it is not well tested yet (read: it works for me)."
2520 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2521 rework some of the code of TK/09 above to avoid the hardwired use of
2522 "%lld" and "long long". Replaced the call to snprintf() with a call to
2525 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2526 records point to non-existent hosts", "retry timeout exceeded", and
2527 "retry time not reached for any host after a long failure period".
2529 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2530 experimental DomainKeys support:
2532 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2533 (2) On an error such as an illegally used "control", the wrong name for
2534 the control was given.
2536 These problems did NOT occur unless DomainKeys support was compiled.
2538 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2540 PH/24 Added ${if match_ip condition.
2542 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2543 databases so that it will be absolutely obvious if a crash occurs in the
2544 DB library. This is a regular occurrence (often caused by mis-matched
2547 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2548 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2549 picked up on a user's system that detects such things. There doesn't seem
2550 to be a gcc warning option for this - only an attribute that has to be
2551 put on the function's prototype. It seems that in Fedora Core 4 they have
2552 set this on a number of new functions. No doubt there will be more in due
2555 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2556 specify a transport. However, if an address that was verified by such a
2557 router was the subject of a callout, Exim crashed because it tried to
2558 read the rcpt_include_affixes from the non-existent transport. Now it
2559 just assumes that the setting of that option is false. This bug was
2560 introduced by 4.51/PH/31.
2562 PH/28 Changed -d+all to exclude +memory, because that information is very
2563 rarely of interest, but it makes the output a lot bigger. People tend to
2564 do -d+all out of habit.
2566 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2567 code in os-type was giving problems when libc.so lives in lib64, like on
2570 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2571 aren't the modern standard, and it seems that some systems' include files
2572 don't always have them. Exim was already checking for some of the newer
2573 ones like T_AAAA, and defining it itself. I've added checks for all the
2574 record types that Exim uses.
2576 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2577 not automatically generating a new one, as it is supposed to. This
2578 prevented TLS from working. If the file did exist, but contained invalid
2579 data, a new version was generated, as expected. It was only the case of a
2580 non-existent file that was broken.
2582 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2583 with a change in libdomainkeys > 0.64.
2585 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2586 from DNS. If the selector record carries the flag, it now has
2587 precedence over the domain-wide flag.
2589 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2591 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2592 the use of a port name that isn't defined in /etc/services) occurred, the
2593 message was deferred as in a normal delivery, and thus remained on the
2594 spool, instead of being failed because of the mua_wrapper setting. This
2595 is now fixed, and I tidied up some of the mua_wrapper messages at the
2598 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2599 the messages in a hash of arrays rather than using individual hashes.
2600 This is a bit cleaner and results in dramatic memory savings, albeit
2601 at a slight CPU cost.
2603 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2604 as requested by Marc Sherman.
2606 SC/10 Eximstats: added histograms for user specified patterns as requested
2609 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2611 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2612 fopen() in the content-scanning modules that did not already have it.
2618 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2619 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2621 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2623 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2625 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2626 to test Sieve filters that use "vacation".
2628 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2629 that changes the way the GnuTLS parameters are stored in the cache file.
2630 The new format can be generated externally. For backward compatibility,
2631 if the data in the cache doesn't make sense, Exim assumes it has read an
2632 old-format file, and it generates new data and writes a new file. This
2633 means that you can't go back to an older release without removing the
2636 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2637 work if there are any delivery delays because "one_time" forces the
2638 parent to be marked "delivered", so its unseen clone is never tried
2639 again. For this reason, Exim now forbids the simultaneous setting of
2642 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2643 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2644 entry if you want to know the details. The fix, however, neglected to
2645 consider the case when local delivery batching is involved. The test for
2646 "previously delivered" was not happening when checking to see if an
2647 address could be batched with a previous (undelivered) one; under
2648 certain circumstances this could lead to multiple deliveries to the same
2651 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2652 in its include files, and this causes problems building Exim.
2654 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2655 header_syntax) but Exim was just ignoring anything given after a slash.
2656 In particular, this caused confusion with an attempt to use "verify =
2657 reverse_host_lookup/defer_ok". An error is now given when options are
2658 supplied for verify items that do not have them. (Maybe reverse_host_
2659 lookup should have a defer_ok option, but that's a different point.)
2661 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2662 defined by RFC 821) to 2048, because there were problems with some AUTH
2663 commands, and RFC 1869 says the size should be increased for extended
2664 SMTP commands that take arguments.
2666 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2669 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2670 "unknown" error; now it says that the functionality isn't in the binary.
2672 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2673 an address' error message when a string expansion fails (syntax or
2674 whatever). Otherwise the password may appear in the log. Following change
2675 PH/42 below, there is no longer a chance of it appearing in a bounce
2678 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2680 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2681 of its addresses was ever tried. (Bugzilla bug #2.)
2683 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2684 the result incorrectly in the debug output. (It correctly added a newline
2685 to what was transported.)
2687 TF/01 Added $received_time.
2689 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2690 commented out examples of how to interface to a virus scanner and to
2691 SpamAssassin. Also added commented examples of av_scanner and
2692 spamd_address settings.
2694 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2695 and controls are allowed in which ACLs. There were a couple of minor
2696 errors. Some of the entries in the conditions table (which is a table of
2697 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2698 negation of where the condition IS allowed.
2700 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2702 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2703 header file does not have a version number, so I've had to invent a new
2704 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2705 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2706 radiusclient), but it was contributed by a Radius user.
2708 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2709 files or directories, for OpenSSL.
2711 PH/19 When an Exim process that is running as root has to create an Exim log
2712 file, it does so in a subprocess that runs as exim:exim so as to get the
2713 ownership right at creation (otherwise, other Exim processes might see
2714 the file with the wrong ownership). There was no test for failure of this
2715 fork() call, which would lead to the process getting stuck as it waited
2716 for a non-existent subprocess. Forks do occasionally fail when resources
2717 run out. I reviewed all the other calls to fork(); they all seem to check
2720 PH/20 When checking for unexpected SMTP input at connect time (before writing
2721 the banner), Exim was not dealing correctly with a non-positive return
2722 from the read() function. If the client had disconnected by this time,
2723 the result was a log entry for a synchronization error with an empty
2724 string after "input=" when read() returned zero. If read() returned -1
2725 (an event I could not check), uninitialized data bytes were printed.
2726 There were reports of junk text (parts of files, etc) appearing after
2729 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2731 PH/22 Added support for macro redefinition, and (re)definition in between
2732 driver and ACL definitions.
2734 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2735 forgetting to use the resulting value; it was using the unexpanded value.
2737 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2738 hadn't been configured. The fix is from Juergen Kreileder, who
2739 understands it better than I do:
2741 "Here's what I see happening with three configured cyrus_sasl
2742 authenticators configured (plain, login, cram-md5):
2744 On startup auth_cyrus_sasl_init() gets called for each of these.
2745 This means three calls to sasl_listmech() without a specified mech_list.
2746 => SASL tests which mechs of all available mechs actually work
2747 => three warnings about OTP not working
2748 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2750 With the patch, sasl_listmech() also gets called three times. But now
2751 SASL's mech_list option is set to the server_mech specified in the the
2752 authenticator. Or in other words, the answer from sasl_listmech()
2753 gets limited to just the mech you're testing for (which is different
2755 => the return list contains just 'plain' or 'login', 'cram-md5' or
2756 nothing depending on the value of ob->server_mech.
2758 I've just tested the patch: Authentication still works fine,
2759 unavailable mechs specified in the exim configuration are still
2760 caught, and the auth.log warnings about OTP are gone."
2762 PH/25 When debugging is enabled, the contents of the command line are added
2763 to the debugging output, even when log_selector=+arguments is not
2766 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2767 answer is "GNU", and only if the return is "GNU/something" is the answer
2770 PH/27 $acl_verify_message is now set immediately after the failure of a
2771 verification in an ACL, and so is available in subsequent modifiers. In
2772 particular, the message can be preserved by coding like this:
2774 warn !verify = sender
2775 set acl_m0 = $acl_verify_message
2777 Previously, $acl_verify_message was set only while expanding "message"
2778 and "log_message" when a very denied access.
2780 PH/28 Modified OS/os.c-Linux with
2782 -#ifndef OS_LOAD_AVERAGE
2783 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2785 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2786 nomenclature these days.)
2788 PH/29 Installed patch from the Sieve maintainer that adds the options
2789 sieve_useraddress and sieve_subaddress to the redirect router.
2791 PH/30 In these circumstances:
2792 . Two addresses routed to the same list of hosts;
2793 . First host does not offer TLS;
2794 . First host accepts first address;
2795 . First host gives temporary error to second address;
2796 . Second host offers TLS and a TLS session is established;
2797 . Second host accepts second address.
2798 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2799 and peerdn, if requested) that were in fact used only for the second
2802 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2803 attention to any local part prefix or suffix that was matched by the
2804 router that accepted the address. It now behaves in the same way as it
2805 does for delivery: the affixes are removed from the local part unless
2806 rcpt_include_affixes is set on the transport.
2808 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2809 timeout during the DATA phase of an incoming message.
2811 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2812 applied a patch sanctioned by the Sieve maintainer.
2814 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2815 the uid or gid is negative. A case of a negative gid caused this to be
2816 noticed. The fix allows for either to be negative.
2818 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2819 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2822 PH/36 The change PH/12 above was broken. Fixed it.
2824 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2825 the grounds that routing the same address twice would always produce the
2826 same answer. This might have been true once, but it is certainly no
2827 longer true now. Routing a child address may depend on the previous
2828 routing that produced that child. Some complicated redirection strategies
2829 went wrong when messages had multiple recipients, and made Exim's
2830 behaviour dependent on the order in which the addresses were given.
2832 I have moved the duplicate checking until after the routing is complete.
2833 Exim scans the addresses that are assigned to local and remote
2834 transports, and removes any duplicates. This means that more work will be
2835 done, as duplicates will always all be routed, but duplicates are
2836 presumably rare, so I don't expect this is of any significance.
2838 For deliveries to pipes, files, and autoreplies, the duplicate checking
2839 still happens during the routing process, since they are not going to be
2842 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2843 It corrects a timeout issue with spamd. This is Ian's comment: "The
2844 background is that sometimes spamd either never reads data from a
2845 connection it has accepted, or it never writes response data. The exiscan
2846 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2847 blindly assumes that writes won't block so it may never time out."
2849 PH/39 Allow G after quota size as well as K and M.
2851 PH/40 The value set for $authenticated_id in an authenticator may not contain
2852 binary zeroes or newlines because the value is written to log lines and
2853 to spool files. There was no check on this. Now the value is run through
2854 the string_printing() function so that such characters are converted to
2855 printable escape sequences.
2857 PH/41 $message_linecount is a new variable that contains the total number of
2858 lines in the message. Compare $body_linecount, which is the count for the
2861 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2862 bounce and delay warning messages, except in certain special cases, which
2865 (a) An SMTP error message from a remote host;
2866 (b) A message specified in a :fail: redirection;
2867 (c) A message specified in a "fail" command in a system filter;
2868 (d) A message specified in a FAIL return from the queryprogram router;
2869 (e) A message specified by the cannot_route_message router option.
2871 In these cases only, Exim does include the error details in bounce and
2872 warning messages. There are also a few cases where bland messages such
2873 as "unrouteable address" or "local delivery error" are given.
2875 PH/43 $value is now also set for the "else" part of a ${run expansion.
2877 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2878 being worked on, but at least Exim now implements the latest version to
2881 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2882 process to complete was treated as a delivery failure, a timeout while
2883 writing the message to the pipe was logged, but erroneously treated as a
2884 successful delivery. Such timeouts include transport filter timeouts. For
2885 consistency with the overall process timeout, these timeouts are now
2886 treated as errors, giving rise to delivery failures by default. However,
2887 there is now a new Boolean option for the pipe transport called
2888 timeout_defer, which, if set TRUE, converts the failures into defers for
2889 both kinds of timeout. A transport filter timeout is now identified in
2892 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2893 systems where "make" and "gmake" are different, calling "gmake" at top
2894 level broke things. I've arranged for the value of $(MAKE) to be passed
2895 from the Makefile to this script so that it can call the same version of
2899 A note about Exim versions 4.44 and 4.50
2900 ----------------------------------------
2902 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2903 changes of various kinds. As a consequence, a big documentation update was
2904 needed. This delayed the release for rather longer than seemed good, especially
2905 in the light of a couple of (minor) security issues. Therefore, the changes
2906 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2907 release. So 4.44 and 4.50 are in effect two different branches that both start
2910 I have left the 4.50 change log unchanged; it contains all the changes since
2911 4.43. The change log for 4.44 is below; many of its items are identical to
2912 those for 4.50. This seems to be the most sensible way to preserve the
2913 historical information.
2919 1. Minor wording change to the doc/README.SIEVE file.
2921 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2922 computation of the current number of files was incorrect.
2924 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2925 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2928 4. Give more explanation in the error message when the command for a transport
2929 filter fails to execute.
2931 5. There are several places where Exim runs a non-Exim command in a
2932 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2933 was being done only for the command run by the queryprogram router. It is
2934 now done for all such subprocesses. The other cases are: ${run, transport
2935 filters, and the commands run by the lmtp and pipe transports.
2937 6. Added CONFIGURE_GROUP build-time option.
2939 7. Some older OS have a limit of 256 on the maximum number of file
2940 descriptors. Exim was using setrlimit() to set 1000 as a large value
2941 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2942 systems. I've change it so that if it can't get 1000, it tries for 256.
2944 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2945 was an oversight, and furthermore, ever since the addition of extra
2946 controls (e.g. 4.43/32), the checks on when to allow different forms of
2947 "control" were broken. There should now be diagnostics for all cases when a
2948 control that does not make sense is encountered.
2950 9. Added the /retain_sender option to "control=submission".
2952 10. $recipients is now available in the predata ACL (oversight).
2954 11. Tidy the search cache before the fork to do a delivery from a message
2955 received from the command line. Otherwise the child will trigger a lookup
2956 failure and thereby defer the delivery if it tries to use (for example) a
2957 cached ldap connection that the parent has called unbind on.
2959 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2960 of $address_data from the recipient verification was clobbered by the
2961 sender verification.
2963 13. The value of address_data from a sender verification is now available in
2964 $sender_address_data in subsequent conditions in the ACL statement.
2966 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2968 15. Added a new option "connect=<time>" to callout options, to set a different
2971 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2972 was its contents. (It was OK if the option was not defined at all.)
2974 17. A "Completed" log line is now written for messages that are removed from
2975 the spool by the -Mrm option.
2977 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2978 information about exactly what failed.
2980 19. Added -dd to debug only the daemon process.
2982 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2983 handles timeouts, both on the server side and network timeouts. Renamed the
2984 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2986 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2987 It is now set to "smtps".
2989 22. $host_address is now set to the target address during the checking of
2990 ignore_target_hosts.
2992 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2993 being passed; this would have caused $sender_host_name to have been used if
2994 matching the list had actually called for a host name (not very likely,
2995 since this list is usually IP addresses). A host name is now passed as
2998 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2999 code that specifies a non-restarting handler (typically sigaction() in
3000 modern systems) in an attempt to fix a rare and obscure crash bug.
3002 25. Narrowed the window for a race in the daemon that could cause it to ignore
3003 SIGCHLD signals. This is not a major problem, because they are used only to
3004 wake it up if nothing else does.
3006 26. A malformed maildirsize file could cause Exim to calculate negative values
3007 for the mailbox size or file count. Odd effects could occur as a result.
3008 The maildirsize information is now recalculated if the size or filecount
3011 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3012 support for a long time. Removed HAVE_SYS_VFS_H.
3014 28. Installed the latest version of exipick from John Jetmore.
3016 29. In an address list, if the pattern was not a regular expression, an empty
3017 subject address (from a bounce message) matched only if the pattern was an
3018 empty string. Non-empty patterns were not even tested. This was the wrong
3019 because it is perfectly reasonable to use an empty address as part of a
3020 database query. An empty address is now tested by patterns that are
3021 lookups. However, all the other forms of pattern expect the subject to
3022 contain a local part and a domain, and therefore, for them, an empty
3023 address still always fails if the pattern is not itself empty.
3025 30. Exim went into a mad DNS loop when attempting to do a callout where the
3026 host was specified on an smtp transport, and looking it up yielded more
3027 than one IP address.
3029 31. Re-factored the code for checking spool and log partition space into a
3030 function that finds that data and another that does the check. The former
3031 is then used to implement four new variables: $spool_space, $log_space,
3032 $spool_inodes, and $log_inodes.
3034 32. The RFC2047 encoding function was originally intended for short strings
3035 such as real names; it was not keeping to the 75-character limit for
3036 encoded words that the RFC imposes. It now respects the limit, and
3037 generates multiple encoded words if necessary. To be on the safe side, I
3038 have increased the buffer size for the ${rfc2047: expansion operator from
3041 33. It is now permitted to omit both strings after an "if" condition; if the
3042 condition is true, the result is "true". As before, when the second string
3043 is omitted, a false condition yields an empty string. This makes it less
3044 cumbersome to write custom ACL and router conditions.
3046 34. Failure to deliver a bounce message always caused it to be frozen, even if
3047 there was an errors_to setting on the router. The errors_to setting is now
3050 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3051 canonical form (fully expanded) before being placed in
3052 $sender_host_address.
3054 36. The table in the code that translates DNS record types into text (T_A to
3055 "A" for instance) was missing entries for NS and CNAME. It is just possible
3056 that this could have caused confusion if both these types were looked up
3057 for the same domain, because the text type is used as part of Exim's
3058 per-process caching. But the chance of anyone hitting this buglet seems
3061 37. The dnsdb lookup has been extended in a number of ways.
3063 (1) There is a new type, "zns", which walks up the domain tree until it
3064 finds some nameserver records. It should be used with care.
3066 (2) There is a new type, "mxh", which is like "mx" except that it returns
3067 just the host names, not the priorities.
3069 (3) It is now possible to give a list of domains (or IP addresses) to be
3070 looked up. The behaviour when one of the lookups defers can be
3071 controlled by a keyword.
3073 (4) It is now possible to specify the separator character for use when
3074 multiple records are returned.
3076 38. The dnslists ACL condition has been extended: it is now possible to supply
3077 a list of IP addresses and/or domains to be looked up in a particular DNS
3080 39. Added log_selector=+queue_time_overall.
3082 40. When running the queue in the test harness, wait just a tad after forking a
3083 delivery process, to get repeatability of debugging output.
3085 41. Include certificate and key file names in error message when GnuTLS fails
3086 to set them up, because the GnuTLS error message doesn't include the name
3087 of the failing file when there is a problem reading it.
3089 42. Allow both -bf and -bF in the same test run.
3091 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3093 44. The "Exiscan patch" is now merged into the mainline Exim source.
3095 45. Sometimes the final signoff response after QUIT could fail to get
3096 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3097 < 0 before doing a fflush(). This bug looks as though it goes back to the
3098 introduction of TLS in release 3.20, but "sometimes" must have been rare
3099 because the tests only now provoked it.
3101 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3102 (this can affect the format of dates).
3104 47. exim_tidydb, when checking for the continued existence of a message for
3105 which it has found a message-specific retry record, was not finding
3106 messages that were in split spool directories. Consequently, it was
3107 deleting retry records that should have stayed in existence.
3109 48. Steve fixed some bugs in eximstats.
3111 49. The SPA authentication driver was not abandoning authentication and moving
3112 on to the next authenticator when an expansion was forced to fail,
3113 contradicting the general specification for all authenticators. Instead it
3114 was generating a temporary error. It now behaves as specified.
3116 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3117 (the order specifies the preference for clients). The order is now AES256,
3118 AES128, 3DES, ARCFOUR128.
3120 51. Small patch to Sieve code - explicitly set From: when generating an
3123 52. Exim crashed if a remote delivery caused a very long error message to be
3124 recorded - for instance if somebody sent an entire SpamAssassin report back
3125 as a large number of 550 error lines. This bug was coincidentally fixed by
3126 increasing the size of one of Exim's internal buffers (big_buffer) that
3127 happened as part of the Exiscan merge. However, to be on the safe side, I
3128 have made the code more robust (and fixed the comments that describe what
3131 53. Now that there can be additional text after "Completed" in log lines (if
3132 the queue_time_overall log selector is set), a one-byte patch to exigrep
3133 was needed to allow it to recognize "Completed" as not the last thing in
3136 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3137 patch that reportedly fixes this has been added. I am not expert enough to
3138 create a test for it. This is what the patch creator wrote:
3140 "I found a little strange behaviour of ldap code when working with
3141 Windows 2003 AD Domain, where users was placed in more than one
3142 Organization Units. When I tried to give exim partial DN, the exit code
3143 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3144 But simultaneously result of request was absolutely normal ldap result,
3145 so I produce this patch..."
3147 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3148 REFERENCE, so I have modified the code to exclude the patch when that macro
3151 55. Some experimental protocols are using DNS PTR records for new purposes. The
3152 keys for these records are domain names, not reversed IP addresses. The
3153 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3154 leaves it alone. Component reversal etc. now happens only for IP addresses.
3157 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3159 57. Double the size of the debug message buffer (to 2048) so that more of very
3160 long debug lines gets shown.
3162 58. The exicyclog utility now does better if the number of log files to keep
3163 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3165 59. Two changes related to the smtp_active_hostname option:
3167 (1) $smtp_active_hostname is now available as a variable.
3168 (2) The default for smtp_banner uses $smtp_active_hostname instead
3169 of $primary_hostname.
3171 60. The host_aton() function is supposed to be passed a string that is known
3172 to be a valid IP address. However, in the case of IPv6 addresses, it was
3173 not checking this. This is a hostage to fortune. Exim now panics and dies
3174 if the condition is not met. A case was found where this could be provoked
3175 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3176 components; fortuitously, this particular loophole had already been fixed
3177 by change 4.50/55 above.
3179 If there are any other similar loopholes, the new check in host_aton()
3180 itself should stop them being exploited. The report I received stated that
3181 data on the command line could provoke the exploit when Exim was running as
3182 exim, but did not say which command line option was involved. All I could
3183 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3184 running as the user.
3187 61. There was a buffer overflow vulnerability in the SPA authentication code
3188 (which came originally from the Samba project). I have added a test to the
3189 spa_base64_to_bits() function which I hope fixes it.
3192 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3193 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3195 63. The daemon start-up calls getloadavg() while still root for those OS that
3196 need the first call to be done as root, but it missed one case: when
3197 deliver_queue_load_max is set with deliver_drop_privilege. This is
3198 necessary for the benefit of the queue runner, because there is no re-exec
3199 when deliver_drop_privilege is set.
3201 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3202 This has been fixed.
3204 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3205 was in use, was not putting the data itself into the right store pool;
3206 consequently, it could be overwritten for a subsequent message in the same
3207 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3210 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3212 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3213 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3214 the function were treating the return as a boolean value, which happened to
3215 work because 0=false and not-0=true, but is not correct code.
3217 68. The host_aton() function was not handling scoped IPv6 addresses (those
3218 with, for example, "%eth0" on the end) correctly.
3220 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3221 negated items (that is, ~something) in unsigned ints. Some compilers
3222 apparently mutter when there is no cast.
3224 70. If an address verification called from an ACL failed, and did not produce a
3225 user-specific message (i.e. there was only a "system" message), nothing was
3226 put in $acl_verify_message. In this situation, it now puts the system
3229 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3230 session; change 4.31/43 added the unwanted input to the log line - except
3231 that it did not do this in the start of session case. It now does.
3233 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3234 This is wrong and can cause the other end to generate a synchronization
3235 error if it is another Exim or anything else that does the synchronization
3236 check. A QUIT command is no longer sent after a timeout.
3238 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3239 during host lookups.
3241 74. The defer_ok option of callout verification was not working if it was used
3242 when verifying addresses in header lines, that is, for this case:
3244 verify = header_sender/callout=defer_ok
3246 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3247 those file descriptors could be used for SMTP connections. If anything
3248 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3249 could be sent to the SMTP client, causing chaos. The daemon now opens
3250 stdin, stdout, and stderr to /dev/null when it puts itself into the
3253 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3254 log by default. The user can override this with suitable Perl magic.
3256 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3257 the log message when discard triggers, was not working for the DATA ACL or
3258 for the non-SMTP ACL.
3260 78. Error message wording change in sieve.c.
3262 79. If smtp_accept_max_per_host was set, the number of connections could be
3263 restricted to fewer than expected, because the daemon was trying to set up
3264 a new connection before checking whether the processes handling previous
3265 connections had finished. The check for completed processes is now done
3266 earlier. On busy systems, this bug wouldn't be noticed because something
3267 else would have woken the daemon, and it would have reaped the completed
3270 80. If a message was submitted locally by a user whose login name contained one
3271 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3272 It caused a spool format error. I have fixed the spool reading code. A
3273 related problem was that the "from" clause in the Received: line became
3274 illegal because of the space(s). It is now covered by ${quote_local_part.
3276 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3279 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3281 83. Patch from Sieve maintainer to fix unterminated string problem in
3282 "vacation" handling.
3284 84. Some minor changes to the Linux configuration files to help with other
3285 OS variants using glibc.
3287 85. One more patch for Sieve to update vacation handling to latest spec.
3290 ----------------------------------------------------
3291 See the note above about the 4.44 and 4.50 releases.
3292 ----------------------------------------------------
3298 1. Change 4.43/35 introduced a bug that caused file counts to be
3299 incorrectly computed when quota_filecount was set in an appendfile
3302 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3303 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3306 3. Give more explanation in the error message when the command for a transport
3307 filter fails to execute.
3309 4. There are several places where Exim runs a non-Exim command in a
3310 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3311 was being done only for the command run by the queryprogram router. It is
3312 now done for all such subprocesses. The other cases are: ${run, transport
3313 filters, and the commands run by the lmtp and pipe transports.
3315 5. Some older OS have a limit of 256 on the maximum number of file
3316 descriptors. Exim was using setrlimit() to set 1000 as a large value
3317 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3318 systems. I've change it so that if it can't get 1000, it tries for 256.
3320 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3321 was an oversight, and furthermore, ever since the addition of extra
3322 controls (e.g. 4.43/32), the checks on when to allow different forms of
3323 "control" were broken. There should now be diagnostics for all cases when a
3324 control that does not make sense is encountered.
3326 7. $recipients is now available in the predata ACL (oversight).
3328 8. Tidy the search cache before the fork to do a delivery from a message
3329 received from the command line. Otherwise the child will trigger a lookup
3330 failure and thereby defer the delivery if it tries to use (for example) a
3331 cached ldap connection that the parent has called unbind on.
3333 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3334 of $address_data from the recipient verification was clobbered by the
3335 sender verification.
3337 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3338 was its contents. (It was OK if the option was not defined at all.)
3340 11. A "Completed" log line is now written for messages that are removed from
3341 the spool by the -Mrm option.
3343 12. $host_address is now set to the target address during the checking of
3344 ignore_target_hosts.
3346 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3347 being passed; this would have caused $sender_host_name to have been used if
3348 matching the list had actually called for a host name (not very likely,
3349 since this list is usually IP addresses). A host name is now passed as
3352 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3353 code that specifies a non-restarting handler (typically sigaction() in
3354 modern systems) in an attempt to fix a rare and obscure crash bug.
3356 15. Narrowed the window for a race in the daemon that could cause it to ignore
3357 SIGCHLD signals. This is not a major problem, because they are used only to
3358 wake it up if nothing else does.
3360 16. A malformed maildirsize file could cause Exim to calculate negative values
3361 for the mailbox size or file count. Odd effects could occur as a result.
3362 The maildirsize information is now recalculated if the size or filecount
3365 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3366 support for a long time. Removed HAVE_SYS_VFS_H.
3368 18. Updated exipick to current release from John Jetmore.
3370 19. Allow an empty sender to be matched against a lookup in an address list.
3371 Previously the only cases considered were a regular expression, or an
3374 20. Exim went into a mad DNS lookup loop when doing a callout where the
3375 host was specified on the transport, if the DNS lookup yielded more than
3378 21. The RFC2047 encoding function was originally intended for short strings
3379 such as real names; it was not keeping to the 75-character limit for
3380 encoded words that the RFC imposes. It now respects the limit, and
3381 generates multiple encoded words if necessary. To be on the safe side, I
3382 have increased the buffer size for the ${rfc2047: expansion operator from
3385 22. Failure to deliver a bounce message always caused it to be frozen, even if
3386 there was an errors_to setting on the router. The errors_to setting is now
3389 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3390 canonical form (fully expanded) before being placed in
3391 $sender_host_address.
3393 24. Updated eximstats to version 1.33
3395 25. Include certificate and key file names in error message when GnuTLS fails
3396 to set them up, because the GnuTLS error message doesn't include the name
3397 of the failing file when there is a problem reading it.
3399 26. Expand error message when OpenSSL has problems setting up cert/key files.
3402 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3403 (this can affect the format of dates).
3405 28. exim_tidydb, when checking for the continued existence of a message for
3406 which it has found a message-specific retry record, was not finding
3407 messages that were in split spool directories. Consequently, it was
3408 deleting retry records that should have stayed in existence.
3410 29. eximstats updated to version 1.35
3411 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3412 1.35 - bugfix such that pie charts by volume are generated correctly
3414 30. The SPA authentication driver was not abandoning authentication and moving
3415 on to the next authenticator when an expansion was forced to fail,
3416 contradicting the general specification for all authenticators. Instead it
3417 was generating a temporary error. It now behaves as specified.
3419 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3420 (the order specifies the preference for clients). The order is now AES256,
3421 AES128, 3DES, ARCFOUR128.
3423 31. Small patch to Sieve code - explicitly set From: when generating an
3426 32. Exim crashed if a remote delivery caused a very long error message to be
3427 recorded - for instance if somebody sent an entire SpamAssassin report back
3428 as a large number of 550 error lines. This bug was coincidentally fixed by
3429 increasing the size of one of Exim's internal buffers (big_buffer) that
3430 happened as part of the Exiscan merge. However, to be on the safe side, I
3431 have made the code more robust (and fixed the comments that describe what
3434 33. Some experimental protocols are using DNS PTR records for new purposes. The
3435 keys for these records are domain names, not reversed IP addresses. The
3436 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3437 leaves it alone. Component reversal etc. now happens only for IP addresses.
3440 34. The host_aton() function is supposed to be passed a string that is known
3441 to be a valid IP address. However, in the case of IPv6 addresses, it was
3442 not checking this. This is a hostage to fortune. Exim now panics and dies
3443 if the condition is not met. A case was found where this could be provoked
3444 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3445 components; fortuitously, this particular loophole had already been fixed
3446 by change 4.50/55 or 4.44/33 above.
3448 If there are any other similar loopholes, the new check in host_aton()
3449 itself should stop them being exploited. The report I received stated that
3450 data on the command line could provoke the exploit when Exim was running as
3451 exim, but did not say which command line option was involved. All I could
3452 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3453 running as the user.
3456 35. There was a buffer overflow vulnerability in the SPA authentication code
3457 (which came originally from the Samba project). I have added a test to the
3458 spa_base64_to_bits() function which I hope fixes it.
3461 36. The daemon start-up calls getloadavg() while still root for those OS that
3462 need the first call to be done as root, but it missed one case: when
3463 deliver_queue_load_max is set with deliver_drop_privilege. This is
3464 necessary for the benefit of the queue runner, because there is no re-exec
3465 when deliver_drop_privilege is set.
3467 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3468 was in use, was not putting the data itself into the right store pool;
3469 consequently, it could be overwritten for a subsequent message in the same
3470 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3473 38. Sometimes the final signoff response after QUIT could fail to get
3474 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3475 < 0 before doing a fflush(). This bug looks as though it goes back to the
3476 introduction of TLS in release 3.20, but "sometimes" must have been rare
3477 because the tests only now provoked it.
3483 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3484 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3485 Now it returns an integer. A number of calls were still expecting a T/F
3486 return. Fortuitously, in all cases, the tests worked in OK situations,
3487 which is the norm. However, things would have gone wrong on any write
3488 failures on the smtp file descriptor. This function is used when sending
3489 messages over SMTP and also when doing verify callouts.
3491 2. When Exim is called to do synchronous delivery of a locally submitted
3492 message (the -odf or -odi options), it no longer closes stderr before doing
3495 3. Implemented the mua_wrapper option.
3497 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3499 5. Implemented the functions header_remove(), header_testname(),
3500 header_add_at_position(), and receive_remove_recipient(), and exported them
3503 6. If an ACL "warn" statement specified the addition of headers, Exim already
3504 inserted X-ACL-Warn: at the start if there was no header name. However, it
3505 was not making this test for the second and subsequent header lines if
3506 there were newlines in the string. This meant that an invalid header could
3507 be inserted if Exim was badly configured.
3509 7. Allow an ACL "warn" statement to add header lines at the start or after all
3510 the Received: headers, as well as at the end.
3512 8. Added the rcpt_4xx retry error code.
3514 9. Added postmaster_mailfrom=xxx to callout verification option.
3516 10. Added mailfrom=xxxx to the callout verification option, for verify=
3519 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3520 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3522 12. Inserted some casts to stop certain compilers warning when using pointer
3523 differences as field lengths or precisions in printf-type calls (mostly
3524 affecting debugging statements).
3526 13. Added optional readline() support for -be (dynamically loaded).
3528 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3529 same clock tick as a message's arrival, so that its received time was the
3530 same as the "first fail" time on the retry record, and that message
3531 remained on the queue past the ultimate address timeout, every queue runner
3532 would try a delivery (because it was past the ultimate address timeout) but
3533 after another failure, the ultimate address timeout, which should have then
3534 bounced the address, did not kick in. This was a "< instead of <=" error;
3535 in most cases the first failure would have been in the next clock tick
3536 after the received time, and all would be well.
3538 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3539 being recognized when the domain list was tested by the match_domain
3540 condition in an expansion string.
3542 16. Added the ${str2b64: operator.
3544 17. Exim was always calling setrlimit() to set a large limit for the number of
3545 processes, without checking whether the existing limit was already
3546 adequate. (It did check for the limit on file descriptors.) Furthermore,
3547 errors from getrlimit() and setrlimit() were being ignored. Now they are
3548 logged to the main and panic logs, but Exim does carry on, to try to do its
3549 job under whatever limits there are.
3551 18. Imported PCRE 5.0.
3553 19. Trivial typo in log message " temporarily refused connection" (the leading
3556 20. If the log selector return_path_on_delivery was set and an address was
3557 redirected to /dev/null, the delivery process crashed because it assumed
3558 that a return path would always be set for a "successful" delivery. In this
3559 case, the whole delivery is bypassed as an optimization, and therefore no
3562 21. Internal re-arrangement: the function for sending a challenge and reading
3563 a response while authentication was assuming a zero-terminated challenge
3564 string. It's now changed to take a pointer and a length, to allow for
3565 binary data in such strings.
3567 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3569 23. Exim was not respecting finduser_retries when seeking the login of the
3570 uid under which it was called; it was always trying 10 times. (The default
3571 setting of finduser_retries is zero.) Also, it was sleeping after the final
3572 failure, which is pointless.
3574 24. Implemented tls_on_connect_ports.
3576 25. Implemented acl_smtp_predata.
3578 26. If the domain in control=submission is set empty, Exim assumes that the
3579 authenticated id is a complete email address when it generates From: or
3580 Sender: header lines.
3582 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3583 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3584 chown and chgrp in /bin and hostname in /usr/bin.
3586 28. Exim was keeping the "process log" file open after each use, just as it
3587 does for the main log. This opens the possibility of it remaining open for
3588 long periods when the USR1 signal hits a daemon. Occasional processlog
3589 errors were reported, that could have been caused by this. Anyway, it seems
3590 much more sensible not to leave this file open at all, so that is what now
3593 29. The long-running daemon process does not normally write to the log once it
3594 has entered its main loop, and it closes the log before doing so. This is
3595 so that log files can straightforwardly be renamed and moved. However,
3596 there are a couple of unusual error situations where the daemon does write
3597 log entries, and I had neglected to close the log afterwards.
3599 30. The text of an SMTP error response that was received during a remote
3600 delivery was being truncated at 512 bytes. This is too short for some of
3601 the long messages that one sometimes sees. I've increased the limit to
3604 31. It is now possible to make retry rules that apply only when a message has a
3605 specific sender, in particular, an empty sender.
3607 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3608 it possible to be selective about when SMTP synchronization is enforced.
3610 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3612 32. Implemented hosts_connection_nolog.
3614 33. Added an ACL for QUIT.
3616 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3619 35. Added mailbox_size and mailbox_filecount to appendfile.
3621 36. Added control = no_multiline_responses to ACLs.
3623 37. There was a bug in the logic of the code that waits for the clock to tick
3624 in the case where the clock went backwards by a substantial amount such
3625 that the microsecond fraction of "now" was more than the microsecond
3626 fraction of "then" (but the whole seconds number was less).
3628 38. Added support for the libradius Radius client library this is found on
3629 FreeBSD (previously only the radiusclient library was supported).
3635 1. When certain lookups returned multiple values in the form name=value, the
3636 quoting of the values was not always being done properly. Specifically:
3637 (a) If the value started with a double quote, but contained no whitespace,
3639 (b) If the value contained whitespace other than a space character (i.e.
3640 tabs or newlines or carriage returns) it was not quoted.
3641 This fix has been applied to the mysql and pgsql lookups by writing a
3642 separate quoting function and calling it from the lookup code. The fix
3643 should probably also be applied to nisplus, ibase and oracle lookups, but
3644 since I cannot test any of those, I have not disturbed their existing code.
3646 2. A hit in the callout cache for a specific address caused a log line with no
3647 reason for rejecting RCPT. Now it says "Previous (cached) callout
3648 verification failure".
3650 3. There was an off-by-one bug in the queryprogram router. An over-long
3651 return line was truncated at 256 instead of 255 characters, thereby
3652 overflowing its buffer with the terminating zero. As well as fixing this, I
3653 have increased the buffer size to 1024 (and made a note to document this).
3655 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3656 when Exim is waiting for an SMTP response from a remote server, Exim
3657 restarts its select() call on the socket, thereby resetting its timeout.
3658 This is not a problem when such interrupts are rare. Somebody set up a cron
3659 job to run exiwhat every 2 minutes, which is less than the normal select()
3660 timeout (5 or 10 minutes). This meant that the select() timeout never
3661 kicked in because it was always reset. I have fixed this by comparing the
3662 time when an interrupt arrives with the time at the start of the first call
3663 to select(). If more time than the timeout has elapsed, the interrupt is
3664 treated as a timeout.
3666 5. Some internal re-factoring in preparation for the addition of Sieve
3667 extensions (by MH). In particular, the "personal" test is moved to a
3668 separate function, and given an option for scanning Cc: and Bcc: (which is
3669 not set for Exim filters).
3671 6. When Exim created an email address using the login of the caller as the
3672 local part (e.g. when creating a From: or Sender: header line), it was not
3673 quoting the local part when it contained special characters such as @.
3675 7. Installed new OpenBSD configuration files.
3677 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3678 try to make them clearer.
3680 9. Callout options, other than the timeout value, were being ignored when
3681 verifying sender addresses in header lines. For example, when using
3683 verify = header_sender/callout=no_cache
3685 the cache was (incorrectly) being used.
3687 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3688 only the Cygwin environment.
3690 11. When return_path_on_delivery was set as a log selector, if different remote
3691 addresses in the same message used different return paths and parallel
3692 remote delivery occurred, the wrong values would sometimes be logged.
3693 (Whenever a remote delivery process finished, the return path value from
3694 the most recently started remote delivery process was logged.)
3696 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3697 lines when AUTH and/or TLS are in use. This is the "received protocol"
3698 field. Exim used to use "asmtp" for authenticated SMTP, without any
3699 indication (in the protocol name) for TLS use. Now it follows the RFC and
3700 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3701 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3702 names appear in log lines as well as in Received: header lines.
3704 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3705 extensions, and comparison tests, and to fix some bugs.
3707 14. Changes to the "personal" filter test:
3709 (1) The test was buggy in that it was just doing the equivalent of
3710 "contains" tests on header lines. For example, if a user's address was
3711 anne@some.where, the "personal" test would incorrectly be true for
3713 To: susanne@some.where
3715 This test is now done by extracting each address from the header in turn,
3716 and checking the entire address. Other tests that are part of "personal"
3717 are now done using regular expressions (for example, to check local parts
3718 of addresses in From: header lines).
3720 (2) The list of non-personal local parts in From: addresses has been
3721 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3722 taken from the Sieve specification recommendations.
3724 (3) If the message contains any header line starting with "List-" it is
3725 treated as non-personal.
3727 (4) The test for "circular" in the Subject: header line has been removed
3728 because it now seems ill-conceived.
3730 15. Minor typos in src/EDITME comments corrected.
3732 16. Installed latest exipick from John Jetmore.
3734 17. If headers_add on a router specified a text string that was too long for
3735 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3736 of string_sprintf() is now avoided.
3738 18. $message_body_size was not set (it was always zero) when running the DATA
3739 ACL and the local_scan() function.
3741 19. For the "mail" command in an Exim filter, no default was being set for
3742 the once_repeat time, causing a random time value to be used if "once" was
3743 specified. (If the value happened to be <= 0, no repeat happened.) The
3744 default is now 0s, meaning "never repeat". The "vacation" command was OK
3745 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3746 (I found it when inspecting the code).
3748 20. There is now an overall timeout for performing a callout verification. It
3749 defaults to 4 times the callout timeout, which applies to individual SMTP
3750 commands during the callout. The overall timeout applies when there is more
3751 than one host that can be tried. The timeout is checked before trying the
3752 next host. This prevents very long delays if there are a large number of
3753 hosts and all are timing out (e.g. when the network connections are timing
3754 out). The value of the overall timeout can be changed by specifying an
3755 additional sub-option for "callout", called "maxwait". For example:
3757 verify = sender/callout=5s,maxwait=20s
3759 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3760 to the end before writing, but this should make it even safer).
3762 22. Exim was forgetting that it had advertised PIPELINING for the second and
3763 subsequent messages on an SMTP connection. It was also not resetting its
3764 memory on STARTTLS and an internal HELO.
3766 23. When Exim logs an SMTP synchronization error within a session, it now
3767 records whether PIPELINING has been advertised or not.
3769 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3770 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3771 rather than long int.
3773 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3775 26. Added the never_mail option to autoreply.
3781 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3782 crash if the getsockname() call failed; this can happen if a connection is
3783 closed very soon after it is established. The problem was simply in the
3784 order in which certain operations were done, causing Exim to try to write
3785 to the SMTP stream before it had set up the file descriptor. The bug has
3786 been fixed by making things happen in the correct order.
3792 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3793 before the connection was closed, thus losing the rejection response.
3795 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3796 some early Solaris releases, but causes trouble in current releases where
3797 socklen_t is defined.
3799 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3802 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3805 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3806 that releasing the top of it at the end releases what was used for sub-
3807 expansions (unless the block got too big). However, discard this block if
3808 the first thing is a variable or header, so that we can use its block when
3809 it is dynamic (useful for very large $message_headers, for example).
3811 6. Lookups now cache *every* query, not just the most recent. A new, separate
3812 store pool is used for this. It can be recovered when all lookup caches are
3813 flushed. Lookups now release memory at the end of their result strings.
3814 This has involved some general refactoring of the lookup sources.
3816 7. Some code has been added to the store_xxx() functions to reduce the amount
3817 of flapping under certain conditions.
3819 8. log_incoming_interface used to affect only the <= reception log lines. Now
3820 it causes the local interface and port to be added to several more SMTP log
3821 lines, for example "SMTP connection from", and rejection lines.
3823 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3825 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3827 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3828 could be overwritten at the end of the current message (or the start of a
3829 new message if it was set in a HELO ACL). The value is now preserved for
3830 the duration of the SMTP connection.
3832 12. If a transport had a headers_rewrite setting, and a matching header line
3833 contained an unqualified address, that address was qualified, even if it
3834 did not match any rewriting rules. The underlying bug was that the values
3835 of the flags that permit the existence of unqualified sender and recipient
3836 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3837 non-local messages, and by -bnq for local messages) were not being
3838 preserved with the message after it was received.
3840 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3841 "next input=" as part of the text comprising the host identity instead of
3842 the correct text. The code was using the same buffer for two different
3843 strings. However, depending on which order the printing function evaluated
3844 its arguments, the bug did not always show up. Under Linux, for example, my
3845 test suite worked just fine.
3847 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3848 doesn't work with some older versions of Perl. It has been changed to "my",
3849 which in any case is probably the better facility to use.
3851 15. A really picky compiler found some instances of statements for creating
3852 error messages that either had too many or two few arguments for the format
3855 16. The size of the buffer for calls to the DNS resolver has been increased
3856 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3857 for addresses that have a lot of PTR records. This alleviates a problem; it
3858 does not fully solve it.
3860 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3861 buffer now truncates the list and logs the incident, which is the same
3862 action as happens when Exim is looking up a host name and its aliases.
3863 Previously in this situation something unpredictable would happen;
3864 sometimes it was "internal error: store_reset failed".
3866 18. If a server dropped the connection unexpectedly when an Exim client was
3867 using GnuTLS and trying to read a response, the client delivery process
3868 crashed while trying to generate an error log message.
3870 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3871 string, for example:
3873 warn message = H1: something\nH2: something
3875 the text was added as a single header line from Exim's point of view
3876 though it ended up OK in the delivered message. However, searching for the
3877 second and subsequent header lines using $h_h2: did not work. This has been
3878 fixed. Similarly, if a system filter added multiple headers in this way,
3879 the routers could not see them.
3881 20. Expanded the error message when iplsearch is called with an invalid key to
3882 suggest using net-iplsearch in a host list.
3884 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3885 ACLs are no longer actually imposed (and a message to that effect is
3888 22. If a "gecos" field in a passwd entry contained escaped characters, in
3889 particular, if it contained a \" sequence, Exim got it wrong when building
3890 a From: or a Sender: header from that name. A second bug also caused
3891 incorrect handling when an unquoted " was present following a character
3892 that needed quoting.
3894 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3895 was not being matched caselessly.
3897 24. Arranged for all hyphens in the exim.8 source to be escaped with
3900 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3901 properly. Recipient callout cache records were still being keyed to include
3902 the sender, even when use_sender was set false. This led to far more
3903 callouts that were necessary. The sender is no longer included in the key
3904 when use_sender is false.
3906 26. Added "control = submission" modifier to ACLs.
3908 27. Added the ${base62d: operator to decode base 62 numbers.
3910 28. dnsdb lookups can now access SRV records.
3912 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3913 the configuration file.
3915 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3916 (-v) mode. This makes the output for a verbose queue run more intelligible.
3918 31. Added a use_postmaster feature to recipient callouts.
3920 32. Added the $body_zerocount variable, containing the number of binary zero
3921 bytes in the message body.
3923 33. The time of last modification of the "new" subdirectory is now used as the
3924 "mailbox time last read" when there is a quota error for a maildir
3927 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3929 35. Added +ignore_unknown as a special item in host lists.
3931 36. Code for decoding IPv6 addresses in host lists is now included, even if
3932 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3933 address was recognized as an IP address, but was then not correctly decoded
3934 into binary, causing unexpected and incorrect effects when compared with
3941 1. Very minor rewording of debugging text in manualroute to say "list of
3942 hosts" instead of "hostlist".
3944 2. If verify=header_syntax was set, and a header line with an unqualified
3945 address (no domain) and a large number of spaces between the end of the
3946 name and the colon was received, the reception process suffered a buffer
3947 overflow, and (when I tested it) crashed. This was caused by some obsolete
3948 code that should have been removed. The fix is to remove it!
3950 3. When running in the test harness, delay a bit after writing a bounce
3951 message to get a bit more predictability in the log output.
3953 4. Added a call to search_tidyup() just before forking a reception process. In
3954 theory, someone could use a lookup in the expansion of smtp_accept_max_
3955 per_host which, without the tidyup, could leave open a database connection.
3957 5. Added the variables $recipient_data and $sender_data which get set from a
3958 lookup success in an ACL "recipients" or "senders" condition, or a router
3959 "senders" option, similar to $domain_data and $local_part_data.
3961 6. Moved the writing of debug_print from before to after the "senders" test
3964 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3965 problems for message scanning, either using a data ACL, or using
3966 local_scan() because the Received: header was not generated till after they
3967 were called (in order to set the time as the time of reception completion).
3968 I have revised the way this works. The header is now generated after the
3969 body is received, but before the ACL or local_scan() are called. After they
3970 are run, the timestamp in the header is updated.
3976 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3977 before starting a queue runner without re-exec. This happened only when
3978 deliver_drop_privilege was set or when the Exim user was set to root. The
3979 effect of the bug was that timeouts during subsequent deliveries caused
3980 crashes instead of being properly handled. The handler is now left at its
3981 default (and expected) setting.
3983 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3984 message, again when deliver_drop_privilege is set or Exim is run as root.
3985 The bug described in (1) was not present in this case, but the tidying up
3986 of the other signals was missing. I have made the two cases consistent.
3988 3. The ignore_target_hosts setting on a manualroute router was being ignored
3989 for hosts that were looked up using the /MX notation.
3991 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3994 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3995 operated on the sender address. After changing the $sender_address to <>
3996 for the sender address verify, Exim was re-instated it as the original
3997 (before rewriting) address, but remembering that it had rewritten it, so it
3998 wasn't rewriting it again. This bug also had the effect of breaking the
3999 sender address verification caching when the sender address was rewritten.
4001 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4002 This has been changed so that if the ip literal address matches
4003 ignore_target_hosts, the router declines.
4005 7. Added expansion conditions match_domain, match_address, and match_local_
4006 part (NOT match_host).
4008 8. The placeholder for the Received: header didn't have a length field set.
4010 9. Added code to Exim itself and to exim_lock to test for a specific race
4011 condition that could lead to file corruption when using MBX delivery. The
4012 issue is with the lockfile that is created in /tmp. If this file is removed
4013 after a process has opened it but before that process has acquired a lock,
4014 there is the potential for a second process to recreate the file and also
4015 acquire a lock. This could lead to two Exim processes writing to the file
4016 at the same time. The added code performs the same test as UW imapd; it
4017 checks after acquiring the lock that its file descriptor still refers to
4018 the same named file.
4020 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4021 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4024 11. Added the smtp_active_hostname option. If used, this will typically be made
4025 to depend on the incoming interface address. Because $interface_address is
4026 not set up until the daemon has forked a reception process, error responses
4027 that can happen earlier (such as "too many connections") no longer contain
4030 12. If an expansion in a condition on a "warn" statement fails because a lookup
4031 defers, the "warn" statement is abandoned, and the next ACL statement is
4032 processed. Previously this caused the whole ACL to be aborted.
4034 13. Added the iplsearch lookup type.
4036 14. Added ident_timeout as a log selector.
4038 15. Added tls_certificate_verified as a log selector.
4040 16. Added a global option tls_require_ciphers (compare the smtp transport
4041 option of the same name). This controls incoming TLS connections.
4043 17. I finally figured out how to make tls_require_ciphers do a similar thing
4044 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4045 before starting the TLS session.
4047 18. Tabs are now shown as \t in -bP output.
4049 19. If the log selector return_path_on_delivery was set, Exim crashed when
4050 bouncing a message because it had too many Received: header lines.
4052 20. If two routers both had headers_remove settings, and the first one included
4053 a superfluous trailing colon, the final name in the first list and the
4054 first name in the second list were incorrectly joined into one item (with a
4055 colon in the middle).
4061 1. Added -C and -D options to the exinext utility, mainly to make it easier
4062 to include in the automated testing, but these could be helpful when
4063 multiple configurations are in use.
4065 2. The exinext utility was not formatting the output nicely when there was
4066 an alternate port involved in the retry record key, nor when there was a
4067 message id as well (for retries that were specific to a specific message
4068 and a specific host). It was also confused by IPv6 addresses, because of
4069 the additional colons they contain. I have fixed the IPv4 problem, and
4070 patched it up to do a reasonable job for IPv6.
4072 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4073 delivery, the log line now contains "pipelined" if PIPELINING was used.
4075 4. An SMTP transport process used to panic and die if the bind() call to set
4076 an explicit outgoing interface failed. This has been changed; it is now
4077 treated in the same way as a connect() failure.
4079 5. A reference to $sender_host_name in the part of a conditional expansion
4080 that was being skipped was still causing a DNS lookup. This no longer
4083 6. The def: expansion condition was not recognizing references to header lines
4084 that used bh_ and bheader_.
4086 7. Added the _cache feature to named lists.
4088 8. The code for checking quota_filecount in the appendfile transport was
4089 allowing one more file than it should have been.
4091 9. For compatibility with Sendmail, the command line option
4099 and sets the incoming protocol and host name (for trusted callers). The
4100 host name and its colon can be omitted when only the protocol is to be set.
4101 Note the Exim already has two private options, -pd and -ps, that refer to
4102 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4103 "s", but I don't think that's a major issue.
4105 10. A number of refactoring changes to the code, none of which should affect
4108 (a) The number of logging options was getting close to filling up the
4109 32-bit word that was used as a bit map. I have split them into two classes:
4110 those that are passed in the argument to log_write(), and those that are
4111 only ever tested independently outside of that function. These are now in
4112 separate 32-bit words, so there is plenty of room for expansion again.
4113 There is no change in the user interface or the logging behaviour.
4115 (b) When building, for example, log lines, the code previously used a
4116 macro that called string_cat() twice, in order to add two strings. This is
4117 not really sufficiently general. Furthermore, there was one instance where
4118 it was actually wrong because one of the argument was used twice, and in
4119 one call a function was used. (As it happened, calling the function twice
4120 did not affect the overall behaviour.) The macro has been replaced by a
4121 function that can join an arbitrary number of extra strings onto a growing
4124 (c) The code for expansion conditions now uses a table and a binary chop
4125 instead of a serial search (which was left over from when there were very
4126 few conditions). Also, it now recognizes conditions like "pam" even when
4127 the relevant support is not compiled in: a suitably worded error message is
4128 given if an attempt is made to use such a condition.
4130 11. Added ${time_interval:xxxxx}.
4132 12. A bug was causing one of the ddress fields not to be passed back correctly
4133 from remote delivery subprocesses. The field in question was not being
4134 subsequently used, so this caused to problems in practice.
4136 13. Added new log selectors queue_time and deliver_time.
4138 14. Might have fixed a bug in maildirsizefile handling that threw up
4139 "unexpected character" debug warnings, and recalculated the data
4140 unnecessarily. In any case, I expanded the warning message to give more
4143 15. Added the message "Restricted characters in address" to the statements in
4144 the default ACL that block characters like @ and % in local parts.
4146 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4147 Three changes have been made:
4149 (a) There was a serious bug; a negative response to MAIL caused the whole
4150 recipient domain to be cached as invalid, thereby blocking all messages
4151 to all local parts at the same domain, from all senders. This bug has
4152 been fixed. The domain is no longer cached after a negative response to
4153 MAIL if the sender used is not empty.
4155 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4158 (c) A new callout option, "use_sender" has been added for people who want
4159 the modified behaviour.
4165 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4168 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4169 indeed breaks things for older releases.
4171 3. Added additional logging to the case where there is a problem reading data
4172 from a filter that is running in a subprocess using a pipe, in order to
4173 try to track down a specific problem.
4175 4. Testing facility fudge: when running in the test harness and attempting
4176 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4177 getting "No route to host". Convert this to a timeout.
4179 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4182 6. Some OS don't have socklen_t but use size_t instead. This affects the
4183 fifth argument of getsockopt() amongst other things. This is now
4184 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4185 can be set for individual OS. I have set it for SunOS5, OSF1, and
4186 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4187 some earlier ones do not.
4189 7. Change 4.30/15 was not doing the test caselessly.
4191 8. The standard form for an IPv6 address literal was being rejected by address
4192 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4193 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4194 this, as well as the form without the "IPv6" on the front (but only when
4195 address literals are enabled, of course).
4197 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4199 10. Exim crashed if a message with an empty sender address specified by -f
4200 encountered a router with an errors_to setting. This could be provoked only
4201 by a command such as
4205 where an empty string was supplied; "<>" did not hit this bug.
4207 11. Installed PCRE release 4.5.
4209 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4210 remained set. It is now erased.
4212 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4213 times from message ids (which are base 36 rather than the normal 62).
4215 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4216 were being counted as actual protocol errors, and logged if the log
4217 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4218 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4219 and DATA following a set of rejected RCPTs do not count as protocol errors.
4220 In other words, Exim assumes they were pipelined, though this may not
4221 actually be the case. Of course, in all cases the client gets an
4222 appropriate error code.
4224 15. If a lookup fails in an ACL condition, a message about the failure may
4225 be available; it is used if testing the ACL cannot continue, because most
4226 such messages specify what the cause of the deferral is. However, some
4227 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4228 that caused an old message to be retained and used if a later statement
4229 caused a defer, replacing the real cause of the deferral.
4231 16. If an IP address had so many PTR records that the DNS lookup buffer
4232 was not large enough to hold them, Exim could crash while trying to process
4233 the truncated data. It now detects and logs this case.
4235 17. Further to 4.21/58, another change has been made: if (and only if) the
4236 first line of a message (the first header line) ends with CRLF, a bare LF
4237 in a subsequent header line has a space inserted after it, so as not to
4238 terminate the header.
4240 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4241 unnecessarily, used atoi() instead of strtol(), and didn't check the
4242 termination when getting file sizes from file names by regex.
4244 19. Completely re-implemented the support for maildirsize files, in the light
4245 of a number of problems with the previous contributed implementation
4246 (4.30/29). In particular:
4248 . If the quota is zero, the maildirsize file is maintained, but no quota is
4251 . If the maildir directory does not exist, it is created before any attempt
4252 to write a maildirsize file.
4254 . The quota value in the file is just a cache; if the quota is changed in
4255 the transport, the new value overrides.
4257 . A regular expression is available for excluding directories from the
4260 20. The autoreply transport checks the characters in options that define the
4261 message's headers; it allows continued headers, but it was checking with
4262 isspace() after an embedded newline instead of explicitly looking for a
4265 21. If all the "regular" hosts to which an address was routed had passed their
4266 expiry times, and had not reached their retry times, the address was
4267 bounced, even if fallback hosts were defined. Now Exim should go on to try
4270 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4271 equivalent code in the SMTP transport. Some hosts send humungous responses
4272 to HELO/EHLO, more than 1024 it seems.
4274 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4275 gives compiler warnings in some environments. I've now done it "properly",
4278 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4279 (because of problems with the built-in one) was declared to return uschar *
4280 instead of char *, causing compiler failure.
4282 25. Fixed a file descriptor leak when processing alias/forward files.
4284 26. Fixed a minor format string issue in dbfn.c.
4286 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4288 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4289 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4292 29. When a sender address is verified, it is cached, to save repeating the test
4293 when there is more than one recipient in a message. However, when the
4294 verification involves a callout, it is possible for different callout
4295 options to be set for different recipients. It is too complicated to keep
4296 track of this in the cache, so now Exim always runs a verification when a
4297 callout is required, relying on the callout cache for the optimization.
4298 The overhead is duplication of the address routing, but this should not be
4301 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4302 to be verified with callout=postmaster, and the main callout worked but the
4303 postmaster check failed, the verification correctly failed. However, if a
4304 subsequent RCPT command asked for sender verification *without* the
4305 postmaster check, incorrect caching caused this verification also to fail,
4308 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4309 it was not caching the DNS options (qualify_single, search_parents) that
4310 were used when the lookup failed. A subsequent lookup with different
4311 options therefore always gave the same answer, though there were cases
4312 where it should not have. (Example: a "domains = !$mx_any" option on a
4313 dnslookup router: the "domains" option is always processed without any
4314 widening, but the router might have qualify_single set.) Now Exim uses the
4315 cached value only when the same options are set.
4317 32. Added John Jetmore's "exipick" utility to the distribution.
4319 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4320 than a timeout (e.g. a certificate is required, and is not provided), an
4321 Exim server now closes the connection immediately. Previously it waited for
4322 the client to close - but if the client is SSL, it seems that they each
4323 wait for each other, leading to a delay before one of them times out.
4325 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4326 maintained 0.8.x compatibility because I don't think many are using it, and
4327 it is clearly obsolete.
4329 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4332 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4333 client certificate was expired. A simple patch fixes this, though I don't
4334 understand the full logic of why the verify callback is called multiple
4337 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4338 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4339 which causes problems with some clients (such as the Certicom SSL Plus
4340 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4341 disables the coutermeasure allowing Eudora to connect."
4343 38. Exim was not checking that a write() to a log file succeeded. This could
4344 lead to Bad Things if a log got too big, in particular if it hit a file
4345 size limit. Exim now panics and dies if it cannot write to a log file, just
4346 as it does if it cannot open a log file.
4348 39. Modified OS/Makefile-Linux so that it now contains
4350 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4352 The two -D definitions ensure that Exim is compiled with large file
4353 support, which makes it possible to handle log files that are bigger than
4356 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4357 instance) a domain was checked against a named list that involved a lookup,
4358 causing $domain_data to be set, then another domain was checked against the
4359 same list, then the first domain was re-checked, the value of $domain_data
4360 after the final check could be wrong. In particular, if the second check
4361 failed, it could be set empty. This bug probably also applied to
4364 41. The strip_trailing_dot option was not being applied to the address given
4365 with the -f command-line option.
4367 42. The code for reading a message's header from the spool was incrementing
4368 $received_count, but never initializing it. This meant that the value was
4369 incorrect (doubled) while delivering a message in the same process in which
4370 it was received. In the most common configuration of Exim, this never
4371 happens - a fresh exec is done - but it can happen when
4372 deliver_drop_privilege is set.
4374 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4375 it now includes up to 150 characters of the unexpected data in the log
4378 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4379 and building data strings. The size of both of these buffers was 10 000
4380 bytes - far larger than anybody would *ever* want, thought I. Needless to
4381 say, somebody hit the limit. I have increased the maximum line length to
4382 20 000 and the maximum data length of concatenated lines to 100 000. I have
4383 also fixed two bugs, because there was no checking on these buffers. Tsk,
4384 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4385 buffer is too small.
4387 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4388 lsearch lookups. Now it does.
4390 46. When parsing a route_list item in a manualroute router, a fixed-length
4391 buffer was used for the list of hosts. I made this 1024 bytes long,
4392 thinking that nobody would ever have a list of hosts that long. Wrong.
4393 Somebody had a whole pile of complicated expansion conditions, and the
4394 string was silently truncated, leading to an expansion error. It turns out
4395 that it is easier to change to an unlimited length (owing to other changes
4396 that have happened since this code was originally written) than to build
4397 structure for giving a limitation error. The length of the item that
4398 expands into the list of hosts is now unlimited.
4400 47. The lsearch lookup could not handle data where the length of text line was
4401 more than 4095 characters. Such lines were truncated, leading to shortened
4402 data being returned. It should now handle lines of any length.
4404 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4405 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4408 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4409 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4410 no longer happens in comment lines. A list of replacements is now placed
4411 at the head of all of the source files, except those whose only change is
4412 to replace PERL_COMMAND in the very first #! line.
4414 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4415 messages on the queue, with a bottom-up merge sort, using code contributed
4416 by Michael Haardt. This should make operations like -bp somewhat faster on
4417 large queues. It won't affect queue runners, except when queue_run_in_order
4420 51. Installed eximstats 1.31 in the distribution.
4422 52. Added support for SRV lookups to the dnslookup router.
4424 53. If an ACL referred to $message_body or $message_body_end, the value was not
4425 reset for any messages that followed in the same SMTP session.
4427 54. The store-handling optimization for building very long strings was not
4428 differentiating between the different store pools. I don't think this
4429 actually made any difference in practice, but I've tidied it.
4431 55. While running the routers to verify a sender address, $sender_address
4432 was still set to the sender address. This is wrong, because when routing to
4433 send a bounce to the sender, it would be empty. Therefore, I have changed
4434 it so that, while verifying a sender address, $sender_address is set to <>.
4435 (There is no change to what happens when verifying a recipient address.)
4437 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4438 target A or AAAA records (if not already returned) without resetting the
4439 qualify_single or search_parents options of the DNS resolver. These are
4440 inappropriate in this case because the targets of MX and SRV records must
4441 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4442 target that, when qualified, matched something in the local domain. These
4443 two options are now turned off when doing these lookups.
4445 57. It seems that at least some releases of Reiserfs (which does not have the
4446 concept of a fixed number of inodes) returns zero and not -1 for the
4447 number of available inodes. This interacted badly with check_spool_inodes,
4448 which assumed that -1 was the "no such thing" setting. What I have done is
4449 to check that the total number of inodes is greater than zero before doing
4450 the test of how many are available.
4452 58. When a "warn" ACL statement has a log_message modifier, the message is
4453 remembered, and not repeated. This is to avoid a lot of repetition when a
4454 message has many recipients that cause the same warning to be written.
4455 Howewer, Exim was preserving the list of already written lines for an
4456 entire SMTP session, which doesn't seem right. The memory is now reset if a
4457 new message is started.
4459 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4460 debugging output unless log_rewrite was also set.
4462 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4463 of (int)(handle) when we know that handle contains (void *)(-1).
4465 61. The Exim daemon panic-logs an error return when it closes the incoming
4466 connection. However "connection reset by peer" seems to be common, and
4467 isn't really an error worthy of noting specially, so that particular error
4470 62. When Exim is trying to find all the local interfaces, it used to panic and
4471 die if the ioctl to get the interface flags failed. However, it seems that
4472 on at least one OS (Solaris 9) it is possible to have an interface that is
4473 included in the list of interfaces, but for which you get a failure error
4474 for this call. This happens when the interface is not "plumbed" into a
4475 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4476 failure of the "get flags" call assumes that the interface is down.
4478 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4479 makes life easier for people who are doing arithmetic on fields extracted
4480 from dates, where you often get leading zeros that should not be
4481 interpreted as octal.
4483 64. Added qualify_domain to the redirect router, to override the global
4486 65. If a pathologically long header line contained very many addresses (the
4487 report of this problem mentioned 10 000) and each of them was rewritten,
4488 Exim could use up a very large amount of memory. (It kept on making new
4489 copies of the header line as it rewrote, and never released the old ones.)
4490 At the expense of a bit more processing, the header rewriting function has
4491 been changed so that it no longer eats memory in this way.
4493 66. The generation of the Received: header has been moved from the time that a
4494 message starts to be received, to the time that it finishes. The timestamp
4495 in the Received: header should now be very close to that of the <= log
4496 line. There are two side-effects of this change:
4498 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4499 logged header lines no longer include the local Received: line, because
4500 it has not yet been created. The same applies to a copy of the message
4501 that is returned to a non-SMTP sender when a message is rejected.
4503 (b) When a filter file is tested using -bf, no additional Received: header
4504 is added to the test message. After some thought, I decided that this
4507 This change does not affect the value of $received_for. It is still set
4508 after address rewriting, but before local_scan() is called.
4510 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4512 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4513 gave an unhelpful panic error message, and a defer error. I have managed to
4514 change this behaviour so that it now rejects any supplied certificate,
4515 which seems right, as the list of acceptable certificates is empty.
4517 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4518 gave an unhelpful defer error. I have not managed to make this reject any
4519 supplied certificates, but the error message it gives is "no certificate
4520 supplied", which is not helpful.
4522 70. exigrep's output now also includes lines that are not associated with any
4523 message, but which match the given pattern. Implemented by a patch from
4524 Martin Sluka, which also tidied up the Perl a bit.
4526 71. Recipient callout verification, like sender verification, was using <> in
4527 the MAIL FROM command. This isn't really the right thing, since the actual
4528 sender may affect whether the remote host accepts the recipient or not. I
4529 have changed it to use the actual sender in the callout; this means that
4530 the cache record is now keyed on a recipient/sender pair, not just the
4531 recipient address. There doesn't seem to be a real danger of callout loops,
4532 since a callout by the remote host to check the sender would use <>.
4533 [SEE ABOVE: changed after hitting problems.]
4535 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4536 temporary errors. However, in the case of such a code being given after
4537 the end of a data transmission (i.e. after ".") Exim was failing to write
4538 a retry record for the message. (Yes, there was some broken host that was
4539 actually sending 8xx at this point.)
4541 73. An unknown lookup type in a host list could cause Exim to panic-die when
4542 the list was checked. (An example that provoked this was putting <; in the
4543 middle of a list instead of at the start.) If this happened during a DATA
4544 ACL check, a -D file could be left lying around. This kind of configuration
4545 error no longer causes Exim to die; instead it causes a defer errror. The
4546 incident is still logged to the main and panic logs.
4548 74. Buglet left over from Exim 3 conversion. The message "too many messages
4549 in one connection" was written to the rejectlog but not the mainlog, except
4550 when address rewriting (yes!) was being logged.
4552 75. Added write_rejectlog option.
4554 76. When a system filter was run not as root (that is, when system_filter_user
4555 was set), the values of the $n variables were not being returned to the
4556 main process; thus, they were not subsequently available in the $sn
4559 77. Added +return_path_on_delivery log selector.
4561 78. A connection timeout was being treated differently from recipients deferred
4562 when testing hosts_max_try with a message that was older than the host's
4563 retry timeout. (The host should not be counted, thus allowing all hosts to
4564 be tried at least once before bouncing.) This may have been the cause of an
4565 occasionally reported bug whereby a message would remain on the queue
4566 longer than the retry timeout, but would be bounced if a delivery was
4567 forced. I say "may" because I never totally pinned down the problem;
4568 setting up timeout/retry tests is difficult. See also the next item.
4570 79. The ultimate address timeout was not being applied to errors that involved
4571 a combination of host plus message (for example, a timeout on a MAIL
4572 command). When an address resolved to a number of possible hosts, and they
4573 were not all tried for each delivery (e.g. because of hosts_max_try), a
4574 message could remain on the queue longer than the retry timeout.
4576 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4579 81. Fixed an obscure SMTP outgoing bug which required at least the following
4580 conditions: (a) there was another message waiting for the same server;
4581 (b) the server returned 5xx to all RCPT commands in the first message so
4582 that the message was not completed; (c) the server dropped the connection
4583 or gave a negative response to the RSET that Exim sends to abort the
4584 transaction. The observed case was a dropped connection after DATA that had
4585 been sent in pipelining mode. That is, the server had advertised PIPELINING
4586 but was not implementing it correctly. The effect of the bug was incorrect
4587 behaviour, such as trying another host, and this could lead to a crash.
4593 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4594 and daemon.c were passed as pointers to ints; they should have been
4595 pointers to socklen_t variables (which are typically unsigned ints).
4597 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4600 3. Fixed a really odd bug that affected only the testing scheme; patching a
4601 certain fixed string in the binary changed the value of another string that
4602 happened to be identical to the end of the original first string.
4604 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4605 name", it returns that address as the IP address. On some operating
4606 systems (e.g. Solaris), it also passes back the IP address string as the
4607 "host name". However, on others (e.g. Linux), it passes back an empty
4608 string. Exim wasn't checking for this, and was changing the host name to an
4609 empty string, assuming it had been canonicized.
4611 5. Although rare, it is permitted to have more than one PTR record for a given
4612 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4613 all the names associated with an address, because they do in Solaris.
4614 However, it seems that they do not in Linux for data that comes from the
4615 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4616 I found this out when I moved to a new Linux workstation and tried to run
4617 the Exim test suite.
4619 To get round this problem I have changed the code so that it now does its
4620 own call to the DNS to look up PTR records when searching for a host name.
4621 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4622 addresses that are only in /etc/hosts are still found.
4624 This behaviour is, however, controlled by an option called host_lookup_
4625 order, which defaults to "bydns:byaddr". If people want to use the other
4626 order, or indeed, just use one or the other means of lookup, they can
4627 specify it in this variable.
4629 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4630 some operating systems, this comes back from gethostbyaddr() as an empty
4631 string, and this is what Exim used to test for. However, it seems that in
4632 other systems, "." is yielded. Exim now tests for this case too.
4634 7. The values of check_spool_space and check_log_space are now held internally
4635 as a number of kilobytes instead of an absolute number of bytes. If a
4636 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4637 kilobyte. This means that much larger values can be stored.
4639 8. Exim monitor: an attempt to get the action menu when not actually pointing
4640 at a message produces an empty menu entitled "No message selected". This
4641 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4642 no entries in it ("Shell widget menu has zero width and/or height"). So I
4643 have added a single, blank menu entry in this case.
4645 9. Added ${quote_local_part.
4647 10. MIME decoding is now applied to the contents of Subject: header lines when
4650 11. Now that a reference to $sender_host_address automatically causes a reverse
4651 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4652 host lookup before query-style lookups in lists that might use this
4653 variable. This has therefore been abolished, and the "net-" prefix is no
4654 longer necessary for query-style lookups.
4656 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4657 have been a typo for LFLAGS, so it has been changed.
4659 13. The install script calls Exim with "-C /dev/null" in order to find the
4660 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4661 to be output. Howeve, since Exim outputs its version number before the
4662 error, it didn't break the script. It just looked ugly. I fixed this by
4663 always allowing "-C /dev/null" if the caller is root.
4665 14. Ignore overlarge ACL variable number when reading spool file - insurance
4666 against a later release with more variables having written the file.
4668 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4669 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4670 this, as well as the form without the "IPv6" on the front.
4672 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4673 OS/Makefile-Darwin file.
4675 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4676 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4678 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4679 variable. However, some OS use ints for inodes. I've added cast to long int
4680 to get rid of the compiler warning.
4682 19. I had forgotten to lock out "/../" in configuration file names when
4683 ALT_CONFIG_PREFIX was set.
4685 20. Routers used for verification do not need to specify transports. However,
4686 if such a router generated a host list, and callout was configured, Exim
4687 crashed, because it could not find a port number from the (non-existent)
4688 transport. It now assumes port 25 in this circumstance.
4690 21. Added the -t option to exigrep.
4692 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4693 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4694 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4695 them is set, LOOKUP_LSEARCH is forced.
4697 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4699 24. Added sender and host information to the "rejected by local_scan()" log
4700 line; previously there was no indication of these.
4702 25. Added .include_if_exists.
4704 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4705 Linux. It turns out that not all file systems support this. Apparently some
4706 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4707 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4708 not supported on the file descriptor, is now ignored when Exim is trying to
4709 sync a directory. This applies only to Linux.
4711 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4713 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4714 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4717 29. Added support for maildirsize files from supplied patch (modified a bit).
4719 30. The use of :fail: followed by an empty string could lead Exim to respond to
4720 sender verification failures with (e.g.):
4722 550 Verification failed for <xxx>
4723 550 Sender verify failed
4725 where the first response line was missing the '-' that indicates it is not
4726 the final line of the response.
4728 31. The loop for finding the name of the user that called Exim had a hardwired
4729 limit of 10; it now uses the value of finduser_retries, which is used for
4730 all other user lookups.
4732 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4735 33. Exim was neglecting to zero errno before one call of strtol() when
4736 expanding a string and expecting an integer value. On some systems this
4737 resulted in spurious "integer overflow" errors. Also, it was casting the
4738 result into an int without checking.
4740 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4741 did not work. The code looks as if it has *never* worked, though it appears
4742 to have been documented since at least releast 1.62. I have made it work.
4744 35. The "timeout_DNS" error in retry rules, also documented since at least
4745 1.62, also never worked. As it isn't clear exactly what this means, and
4746 clearly it isn't a major issue, I have abolished the feature by treating it
4747 as "timeout", and writing a warning to the main and panic logs.
4749 36. The display of retry rules for -brt wasn't always showing the error code
4752 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4753 timeout_connect_A, timeout_connect_MX.
4755 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4756 to the empty sender.
4758 39. The daemon was not analysing the content of -oX till after it had closed
4759 stderr and disconnected from the controlling terminal. This meant that any
4760 syntax errors were only noted on the panic log, and the return code from
4761 the command was 0. By re-arranging the code a little, I've made the
4762 decoding happen first, so such errors now appear on stderr, and the return
4763 code is 1. However, the actual setting up of the sockets still happens in
4764 the disconnected process, so errors there are still only recorded on the
4767 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4768 connections (as happens on some IP stacks) was logged at start up time as
4769 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4770 it from "IPv6 and IPv4", which means that two separate sockets are being
4773 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4774 says whether AF_INET or AF_INET6 was passed as an argument.
4776 42. Exiwhat output was messed up when time zones were included in log
4779 43. Exiwhat now gives more information about the daemon's listening ports,
4780 and whether -tls-on-connect was used.
4782 44. The "port" option of the smtp transport is now expanded.
4784 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4785 silently ignored. Now an error message is written to the main and panic
4788 46. There's a new ACL modifier called "logwrite" which writes to a log file
4789 as soon as it is encountered.
4791 47. Added $local_user_uid and $local_user_gid at routing time.
4793 48. Exim crashed when trying to verify a sender address that was being
4796 49. Exim was recognizing only a space character after ".include". It now also
4797 recognizes a tab character.
4799 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4800 extracting the relevant information from the specification. The man page no
4801 longer contains scrambled data for the -d option, and I've added a section
4802 at the front about calling Exim under different names.
4804 51. Added "extra_headers" argument to the "mail" command in filter files.
4806 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4809 53. Installed eximstats 1.29.
4811 54. Added transport_filter_timeout as a generic transport option.
4813 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4814 Cc: header lines. This was required by RFC 822, but it not required by RFC
4817 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4818 incoming messages that did not have them. Now it does so only if the
4819 message originates locally, that is, if there is no associated remote host
4820 address. When Resent- header lines are present, this applies to the Resent-
4821 lines rather than the non-Resent- lines.
4823 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4824 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4826 58. Messages for configuration errors now include the name of the main
4827 configuration file - useful now that there may be more than one file in a
4828 list (.included file names were always shown).
4830 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4831 for those rare installations that do not start the daemon as root or run it
4832 setuid root. I've cut out the call to initgroups() if the daemon is not
4835 60. The Exim user and group can now be bound into the binary as text strings
4836 that are looked up at the start of Exim's processing.
4838 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4840 62. Added $mailstore_basename variable.
4842 63. Installed patch to sieve.c from Michael Haardt.
4844 64. When Exim failed to open the panic log after failing to open the main log,
4845 the original message it was trying to log was written to stderr and debug
4846 output, but if they were not available (the usual case in production), it
4847 was lost. Now it is written to syslog before the two lines that record the
4848 failures to open the logs.
4850 65. Users' Exim filters run in subprocesses under the user's uid. It is
4851 possible for a "deliver" command or an alias in a "personal" command to
4852 provoke an address rewrite. If logging of address rewriting is configured,
4853 this fails because the process is not running as root or exim. There may be
4854 a better way of dealing with this, but for the moment (because 4.30 needs
4855 to be released), I have disabled address rewrite logging when running a
4856 filter in a non-root, non-exim process.
4862 1. The buildconfig auxiliary program wasn't quoting the value set for
4863 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4864 not defined. This bug was masked in 4.22 by the effect that was fixed in
4867 2. Some messages that were rejected after a message id was allocated were
4868 shown as "incomplete" by exigrep. It no longer does this for messages that
4869 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4871 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4872 have allow_domain_literals set, the ID did not get logged in the <= line.
4873 Domain literals are now always recognized in Message-ID: header lines.
4875 4. The first argument for a ${extract expansion item is the key name or field
4876 number. Leading and trailing spaces in this item were not being ignored,
4877 causing some misleading effects.
4879 5. When deliver_drop_privilege was set, single queue runner processes started
4880 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4881 same command in the process it spins off) were not dropping privilege.
4883 6. When the daemon running as "exim" started a queue runner, it always
4884 re-executed Exim in the spun-off process. This is a waste of effort when
4885 deliver_drop_privilege is set. The new process now just calls the
4886 queue-runner function directly.
4892 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4895 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4896 ignored. Though the use of -oP was forcing the writing of a pid file, it
4897 was always written to the default place.
4899 3. If the message "no IP address found for host xxxx" is generated during
4900 incoming verification, it is now followed by identification of the incoming
4901 connection (so you can more easily find what provoked it).
4903 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4905 5. Added some features to "harden" Exim a bit more against certain attacks:
4907 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4908 be put in Local/Makefile. This is like the never_users runtime option,
4909 but it cannot be overridden. The default setting is "root".
4911 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4912 prefix string with which any file named in a -C command line option
4915 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4916 is retained for -C and -D only if the caller of Exim is root. Without
4917 it, the exim user may also use -C and -D and retain privilege.
4919 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4920 command line option is disabled.
4922 6. Macro names set by the -D option must start with an upper case letter, just
4923 like macro names defined in the configuration file.
4925 7. Added "dereference=" facility to LDAP.
4927 8. Two instances of the typo "uknown" in the source files are fixed.
4929 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4930 the Configure-Makefile script screwed up while processing it.
4932 10. Incorporated PCRE 4.4.
4934 11. The SMTP synchronization check was not operating right at the start of an
4935 SMTP session. For example, it could not catch a HELO sent before the client
4936 waited for the greeting. There is now a check for outstanding input at the
4937 point when the greeting is written. Because of the duplex, asynchronous
4938 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4939 way, but not yet received, when the check is performed.
4941 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4942 on TCP/IP sockets, because this apparently causes some broken clients to
4945 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4946 unchanged) from the Cygwin maintainer.
4948 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4949 was supported instead of testing for mbx. Effectively a typo.
4951 15. The spa authenticator server code was not checking that the input it
4952 received was valid base64.
4954 16. The debug output line for the "set" modifier in ACLs was not showing the
4955 name of the variable that was being set.
4957 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4959 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4960 lookup on its own. Something else was needed to trigger the lookup. For
4961 example, a match in host_lookup or the need for a host name in a host list.
4962 Now, if $sender_host_name is referenced and the host name has not yet been
4963 looked up, a lookup is performed. If the lookup fails, the variable remains
4964 empty, and $host_lookup_failed is set to "1".
4966 19. Added "eqi" as a case-independent comparison operator.
4968 20. The saslauthd authentication condition could segfault if neither service
4969 nor realm was specified.
4971 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4972 error message that was logged was misleading, and incoming SMTP
4973 connections were dropped. The message is now more accurate, and temporary
4974 errors are given to SMTP connections.
4976 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4977 (except RSET) with a 421 error, until QUIT is received. However, it was
4978 failing to send a response to QUIT.
4980 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4981 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4982 ACL is now run after the helo_try_verify_hosts code.
4984 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4985 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4986 case-independent, so other case variants are also recognized). Apparently
4987 some systems use these upper case variants.
4989 25. If more than two messages were waiting for the same host, and a transport
4990 filter was specified for the transport, Exim sent two messages over the
4991 same TCP/IP connection, and then failed with "socket operation on non-
4992 socket" when it tried to send the third.
4994 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4996 27. The extern definition of crypt16() in expand.c was not being excluded when
4997 the OS had its own crypt16() function.
4999 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5000 as a preferred synonym for return_size_limit, both as an option and as an
5003 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5005 30. Changed the default configuration ACL to relax the local part checking rule
5006 for addresses that are not in any local domains. For these addresses,
5007 slashes and pipe symbols are allowed within local parts, but the sequence
5008 /../ is explicitly forbidden.
5010 31. SPA server authentication was not clearing the challenge buffer before
5013 32. log_message in a "warn" ACL statement was writing to the reject log as
5014 well as to the main log, which contradicts the documentation and doesn't
5015 seem right (because no rejection is happening). So I have stopped it.
5017 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5018 However, I am unable to do any testing of this.
5020 34. Fixed an infelicity in the appendfile transport. When checking directories
5021 for a mailbox, to see if any needed to be created, it was accidentally
5022 using path names with one or more superfluous leading slashes; tracing
5023 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5025 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5026 contents are added to the log line that is written for every discarded
5027 recipient. (Previously a log_message setting was ignored.)
5029 36. The ${quote: operator now quotes the string if it is empty.
5031 37. The install script runs exim in order to find its version number. If for
5032 some reason other than non-existence or emptiness, which it checks, it
5033 could not run './exim', it was installing it with an empty version number,
5034 i.e. as "exim-". This error state is now caught, and the installation is
5037 38. An argument was missing from the function that creates an error message
5038 when Exim fails to connect to the socket for saslauthd authentication.
5039 This could cause Exim to crash, or give a corrupted message.
5041 39. Added isip, isip4, and isip6 to ${if conditions.
5043 40. The ACL variables $acl_xx are now saved with the message, and can be
5044 accessed later in routers, transports, and filters.
5046 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5047 strings in the file are not string-expanded.
5049 42. If a MAIL command specified a SIZE value that was too large to fit into an
5050 int variable, the check against message_size_limit failed. Such values are
5051 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5052 day this will have to be increased, but I don't think I want to be around
5053 when emails are that large.
5060 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5061 iconv() is not standard in FreeBSD.
5063 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5064 IPv6 enabled. The observed symptom was a segmentation fault on return from
5065 the function os_common_find_running_interfaces() in src/os.c.
5067 3. In the check_special_case() function in daemon.c I had used "errno" as an
5068 argument name, which causes warnings on some systems. This was basically a
5069 typo, since it was named "eno" in the comments!
5071 4. The code that waits for the clock to tick (at a resolution of some fraction
5072 of a second) so as to ensure message-id uniqueness was always waiting for
5073 at least one whole tick, when it could have waited for less. [This is
5074 almost certainly not relevant at current processor speeds, where it is
5075 unlikely to ever wait at all. But we try to future-proof.]
5077 5. The function that sleeps for a time interval that includes fractions of a
5078 second contained a race. It did not block SIGALRM between setting the
5079 timer, and suspending (a couple of lines later). If the interval was short
5080 and the sigsuspend() was delayed until after it had expired, the suspension
5081 never ended. On busy systems this could lead to processes getting stuck for
5084 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5085 process, before it forks any delivery processes. The open lookup caching
5086 mechanism meant that the open file or database connection was passed into
5087 the delivery process. The problem was that delivery processes always tidy
5088 up cached lookup data. This could cause a problem for the next delivery
5089 process started by the queue runner, because the external queue runner
5090 process does not know about the closure. So the next delivery process
5091 still has data in the lookup cache. In the case of a file lookup, there was
5092 no problem because closing a file descriptor in a subprocess doesn't affect
5093 the parent. However, if the lookup was caching a connection to a database,
5094 the connection was closed, and the second delivery process was likely to
5095 see errors such as "PGSQL: query failed: server closed the connection
5096 unexpectedly". The problem has been fixed by closing all cached lookups
5097 in a queue runner before running a delivery process.
5099 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5100 seem to have the "const" qualifier which it has on other OS. I've
5103 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5104 *of the same type* (client or server) with the same public name that an
5105 error should be diagnosed.
5107 9. When Exim looked up a host name for an IP address, but failed to find the
5108 original IP address when looking up the host name (a safety check), it
5109 output the message "<ip address> does not match any IP for NULL", which was
5110 confusing, to say the least. The bug was that the host name should have
5111 appeared instead of "NULL".
5113 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5114 user that is built into the binary, and the -C or -D options is used, root
5115 privilege is dropped before the configuration file is read. In addition,
5116 logging is switched to stderr instead of the normal log files. If the
5117 configuration then re-defines the Exim user, the unprivileged environment
5118 is probably not what is expected, so Exim logs a panic warning message (but
5121 However, if deliver_drop_privilege is set, the unprivileged state may well
5122 be exactly what is intended, so the warning has been cut out in that case,
5123 and Exim is allowed to try to write to its normal log files.
5129 1. smtp_return_error_details was not giving details for temporary sender
5130 or receiver verification errors.
5132 2. Diagnose a configuration error if two authenticators have the same public
5135 3. Exim used not to create the message log file for a message until the first
5136 delivery attempt. This could be confusing when incoming messages were held
5137 for policy or load reasons. The message log file is now created at the time
5138 the message is received, and an initial "Received" line is written to it.
5140 4. The automatically generated man page for command line options had a minor
5141 bug that caused no ill effects; however, a more serious problem was that
5142 the procedure for building the man page automatically didn't always
5143 operate. Consequently, release 4.20 contains an out-of-date version. This
5144 shouldn't happen again.
5146 5. When building Exim with embedded Perl support, the script that builds the
5147 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5148 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5150 6. The freeze_tell option was not being used for messages that were frozen on
5151 arrival, either by an ACL or by local_scan().
5153 7. Added the smtp_incomplete_transaction log selector.
5155 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5156 was accepting AUTH without a new EHLO.
5158 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5159 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5162 10. Logging of TCP/IP connections (when configured) now happens in the main
5163 daemon process instead of the child process, so that the TCP/IP connection
5164 count is more accurate (but it can never be perfect).
5166 11. The use of "drop" in a nested ACL was not being handled correctly in the
5167 outer ACL. Now, if condition failure induced by the nested "drop" causes
5168 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5169 or "require"), the connection is dropped.
5171 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5172 that yield "discard" can now be used with an "accept" or a "discard" verb,
5173 but an error is generated for any others (because I can't see a useful way
5174 to define what should happen).
5176 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5177 are now processed in the same way as lines in the Exim configuration file.
5178 In particular, continuation lines are supported.
5180 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5182 15. Added -ti meaning -t -i.
5184 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5185 domains, and warn by logging if others are found.
5187 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5188 returned from GIFCONF when Exim is trying to find the list of interfaces on
5189 a host. The code in os.c has been modified to copy each ifreq to an aligned
5190 structure in all cases.
5192 Also, in some cases, the returned ifreq's were being copied to a 'struct
5193 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5194 means the last couple of bytes of an IPv6 address could be chopped if the
5195 ifreq contained only a normal sockaddr (14 bytes storage).
5197 18. Named domain lists were not supported in the hosts_treat_as_local option.
5198 An entry such as +xxxx was not recognized, and was treated as a literal
5201 19. Ensure that header lines added by a DATA ACL are included in the reject log
5202 if the ACL subsequently rejects the message.
5204 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5205 MD5 (which is deprecated).
5207 21. When testing a filter file using -bf, Exim was writing a message when it
5208 took the sender from a "From " line in the message, but it was not doing so
5209 when it took $return_path from a Return-Path: header line. It now does.
5211 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5212 with a valid header line field name (a series of printing characters
5213 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5215 23. Changed "disc" in the source to "disk" to conform to the documentation and
5216 the book and for uniformity.
5218 24. Ignore Sendmail's -Ooption=value command line item.
5220 25. When execve() failed while trying to run a command in a pipe transport,
5221 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5222 could be confused with a return value of 69 from the command itself. This
5223 has been changed to 127, the value the shell returns if it is asked to run
5224 a non-existent command. The wording for the related log line suggests a
5225 non-existent command as the problem.
5227 26. If received_header_text expands to an empty string, do not add a Received:
5228 header line to the message. (Well, it adds a token one on the spool, but
5229 marks it "old" so that it doesn't get used or transmitted.)
5231 27. Installed eximstats 1.28 (addition of -nt option).
5233 28. There was no check for failure on the call to getsockname() in the daemon
5234 code. This can fail if there is a shortage of resources on the system, with
5235 ENOMEM, for example. A temporary error is now given on failure.
5237 29. Contrary to the C standard, it seems that in some environments, the
5238 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5239 program. Exim now does this explicitly; it affects the formatting of
5240 timestamps using strftime().
5242 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5243 complaints. I've now initialized all the variables, to avoid this.
5245 32. Header lines added by a system filter were not being "seen" during
5246 transport-time rewrites.
5248 33. The info_callback() function passed to OpenSSL is set up with type void
5249 (*)(SSL *, int, int), as described somewhere. However, when calling the
5250 function (actually a macro) that sets it up, the type void(*)() is
5251 expected. I've put in a cast to prevent warnings from picky compilers.
5253 34. If a DNS black list lookup found a CNAME record, but there were no A
5254 records associated with the domain it pointed at, Exim crashed.
5256 35. If a DNS black list lookup returned more than one A record, Exim ignored
5257 all but the first. It now scans all returned addresses if a particular IP
5258 value is being sought. In this situation, the contents of the
5259 $dnslist_value variable are a list of all the addresses, separated by a
5262 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5263 to accept a host name and all its aliases if the forward lookup for any of
5264 them yielded the IP address of the incoming connection. Now it accepts only
5265 those names whose forward lookup yields the correct IP address. Any other
5266 names are discarded. This closes a loophole whereby a rogue DNS
5267 administrator could create reverse DNS records to break through a
5268 wildcarded host restriction in an ACL.
5270 37. If a user filter or a system filter that ran in a subprocess used any of
5271 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5272 the wrong values were passed to the pipe command ($thisaddress had the
5273 value of $0, $0 had the value of $1, etc). This bug was introduced by
5274 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5276 38. Improved the line breaking for long SMTP error messages from ACLs.
5277 Previously, if there was no break point between 40 and 75 characters, Exim
5278 left the rest of the message alone. Two changes have been made: (a) I've
5279 reduced the minimum length to 35 characters; (b) if it can't find a break
5280 point between 35 and 75 characters, it looks ahead and uses the first one
5281 that it finds. This may give the occasional overlong line, but at least the
5282 remaining text gets split now.
5284 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5285 file descriptors might be low, and that setting 1000 would always raise it.
5286 It turns out that in some environments, the limit is already over 1000 and
5287 that lowering it causes trouble. So now Exim takes care not to decrease it.
5289 40. When delivering a message, the value of $return_path is set to $sender_
5290 address at the start of routing (routers may change the value). By an
5291 oversight, this default was not being set up when an address was tested by
5292 -bt or -bv, which affected the outcome if any router or filter referred to
5295 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5296 log only when "message" or "log_message" are set. However, if one of the
5297 conditions was an address verification, or a call to a nested ACL, the
5298 messages generated by the underlying test were being passed through. This
5299 no longer happens. The underlying message is available in $acl_verify_
5300 message for both "message" and "log_message" expansions, so it can be
5301 passed through if needed.
5303 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5304 new expansion $bh_ to give the encoded byte string without charset
5305 translation. Translation happens only if iconv() is available; HAVE_ICONV
5306 indicates this at build time. HEADERS_CHARSET gives the charset to
5307 translate to; headers_charset can change it in the configuration, and
5308 "headers charset" can change it in an individual filter file.
5310 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5311 that creates RFC 2047 encoded "words" labels them as that charset instead
5312 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5313 expansion operator; (ii) when Exim creates a From: line for a local
5314 message; (iii) when a header line is rewritten to include a "phrase" part.
5316 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5317 buggy, causing it to skip the first lines of messages whose message ID
5318 ended in 'D'. This would not have bitten before Exim release 4.14, because
5319 message IDs were unlikely to end in 'D' before then. The effect was to have
5320 incorrect size information for certain domains.
5322 45. #include "config.h" was missing at the start of the crypt16.c module. This
5323 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5326 46. If there was a timeout during a "random" callout check, Exim treated it as
5327 a failure of the random address, and carried on sending RSET and the real
5328 address. If the delay was just some slowness somewhere, the response to the
5329 original RCPT would be taken as a response to RSET and so on, causing
5330 mayhem of various kinds.
5332 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5333 when I implemented it. It didn't allow for the fact that some option values
5334 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5335 the right test for positive values.
5337 48. Domain names in DNS records are case-independent. Exim always looks them up
5338 in lower case. Some resolvers return domain names in exactly the case they
5339 appear in the zone file, that is, they may contain uppercase letters. Not
5340 all resolvers do this - some return always lower case. Exim was treating a
5341 change of case by a resolver as a change of domain, similar to a widening
5342 of a domain abbreviation. This triggered its re-routing code and so it was
5343 trying to route what was effectively the same domain again. This normally
5344 caused routing to fail (because the router wouldn't handle the domain
5345 twice). Now Exim checks for this case specially, and just changes the
5346 casing of the domain that it ultimately uses when it transmits the message
5349 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5352 50. If a filter generated a file delivery with a non-absolute name (possible if
5353 no home directory exists for the router), the forbid_file option was not
5356 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5357 the existing equality matching.
5359 52. Exim was using ints instead of ino_t variables in some places where it was
5360 dealing with inode numbers.
5362 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5363 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5364 called TMPDIR, and if it finds it is different, it changes its value.
5366 54. The smtp_printf() function is now made available to local_scan() so
5367 additional output lines can be written before returning. There is also an
5368 smtp_fflush() function to enable the detection of a dropped connection.
5369 The variables smtp_input and smtp_batched_input are exported to
5372 55. Changed the default runtime configuration: the message "Unknown user"
5373 has been removed from the ACL, and instead placed on the localuser router,
5374 using the cannot_route_message feature. This means that any verification
5375 failures that generate their own messages won't get overridden. Similarly,
5376 the "Unrouteable address" message that was in the ACL for unverifiable
5377 relay addresses has also been removed.
5379 56. Added hosts_avoid_esmtp to the smtp transport.
5381 57. The exicyclog script was not checking for the esoteric option
5382 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5383 will work only if exicyclog is run under the appropriate euid.
5385 58. Following a discussion on the list, the rules by which Exim recognises line
5386 endings on incoming messages have been changed. The -dropcr and drop_cr
5387 options are now no-ops, retained only for backwards compatibility. The
5388 following line terminators are recognized: LF CRLF CR. However, special
5389 processing applies to CR:
5391 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5392 nor a local message in the state where . is a terminator.
5394 (ii) If a bare CR is encountered in a header line, an extra space is added
5395 after the line terminator so as not to end the header. The reasoning
5396 behind this is that bare CRs in header lines are most likely either
5397 to be mistakes, or people trying to play silly games.
5399 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5400 was being incorrectly given as 18 bytes larger than it should have been.
5401 This is a VOB (very old bug).
5403 60. This may never have affected anything current, but just in case it has:
5404 When the local host is found other than at the start of a list of hosts,
5405 the local host, those with the same MX, and any that follow, are discarded.
5406 When the list in question was part of a longer list of hosts, the following
5407 hosts (not currently being processed) were also being discarded. This no
5408 longer happens. I'm not sure if this situation could ever has previously
5411 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5414 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5415 header. This is something that is recommended in a new Internet Draft, and
5416 is something that is documented as being done by Sendmail. There are two
5417 possible values. For messages generated by the autoreply transport, Exim
5420 Auto-Submitted: auto-replied
5422 whereas for all other generated messages (e.g. bounces) it adds
5424 Auto-Submitted: auto-generated
5426 63. The "personal" condition in filters now includes a test for the
5427 Auto-Submitted: header. If it contains the string "auto-" the message it
5428 not considered personal.
5430 64. Added rcpt_include_affixes as a generic transport option.
5432 65. Added queue_only_override (default true).
5434 66. Added the syslog_duplication option.
5436 67. If what should have been the first header line of a message consisted of
5437 a space followed by a colon, Exim was mis-interpreting it as a header line.
5438 It isn't of course - it is syntactically invalid and should therefore be
5439 treated as the start of the message body. The misbehaviour could have
5440 caused a number of strange effects, including loss of data in subsequent
5441 header lines, and spool format errors.
5443 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5444 client host had authenticated. This control can now be exercised by an ACL
5445 for more flexibility.
5447 69. By default, callouts do not happen when testing with -bh. There is now a
5448 variant, -bhc, which does actually run the callout code, including
5449 consulting and updating the callout cache.
5451 70. Added support for saslauthd authentication, courtesy of Alexander
5454 71. If statvfs() failed on the spool or log directories while checking their
5455 size for availability, Exim confusingly gave the error "space shortage".
5456 Furthermore, in debugging mode it crashed with a floating point exception.
5457 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5458 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5459 serious problem, Exim now writes to the main and panic logs when this
5460 happens, with details of the failure. It then refuses to accept the
5461 incoming message, giving the message "spool directory problem" or "log
5462 directory problem" with a 421 code for SMTP messages.
5464 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5465 0, 1, and 2 exist, because some OS complain for execs without them (see
5466 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5467 descriptors. However, the code omitted to check that the open succeeded,
5468 causing mysterious errors if for some reason the permissions on /dev/null
5469 got screwed. Now Exim writes a message to the main and panic logs, and
5470 bombs out if it can't open /dev/null.
5472 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5473 interact so that it is all more flexible. It is supposed to remain
5474 backwards compatible. Also added extra_local_interfaces.
5476 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5477 to bomb out with an assertion failure - to the client this appears as a
5478 connection drop. This problem occurs in the part of the code that was taken
5479 from the Samba project. Fortunately, the assertion is in a very simple
5480 function, so I have fixed this by reproducing the function inline in the
5481 one place where it is called, and arranging for authentication to fail
5482 instead of killing the process with assert().
5484 75. The SPA client code was not working when the server requested OEM rather
5485 than Unicode encoding.
5487 76. Added code to make require_files with a specific uid setting more usable in
5488 the case where statting the file as root fails - usually a non-root-mounted
5489 NFS file system. When this happens and the failure is EACCES, Exim now
5490 forks a subprocess and does the per-uid checking as the relevant uid.
5492 77. Added process_log_path.
5494 78. If log_file_path was not explicitly set, a setting of check_log_space or
5495 check_log_inodes was ignored.
5497 79. If a space check for the spool or log partitions fails, the incident is now
5498 logged. Of course, in the latter case the data may get lost...
5500 80. Added the %p formatting code to string_format() so that it can be used to
5501 print addresses in debug_print(). Adjusted all the address printing in the
5502 debugging in store.c to use %p rather than %d.
5504 81. There was a concern that a line of code in smtp_in.c could overflow a
5505 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5506 initially expressed, the concern was not well-founded, because trailing
5507 spaces are removed early. However, if the trailing spaces were followed by
5508 a NULL, they did not get removed, so the overflow was possible. Two fixes
5511 (a) I re-wrote the offending code in a cleaner fashion.
5512 (b) If an incoming SMTP command contains a NULL character, it is rejected
5515 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5516 runs initgroups(), so that if the Exim user is in any additional groups,
5517 they will be used during message reception.
5523 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob