1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PP/01 Solaris build fix for Oracle's LDAP libraries.
10 Bugzilla 1109, patch from Stephen Usher.
12 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
14 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
17 TF/02 Fix a couple more cases where we did not log the error message
18 when unlink() failed. See also change 4.74-TF/03.
20 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
21 lock up or crash if it happened to be inside a call to libc when it
22 got a SIGUSR1 from exiwhat.
24 The SIGUSR1 handler appends the current process status to the process
25 log which is later printed by exiwhat. It used to use the general
26 purpose logging code to do this, but several functions it calls are
29 The new output code in the SIGUSR1 handler is specific to the process
30 log, and simple enough that it's easy to inspect for signal safety.
31 Removing some special cases also simplifies the general logging code.
32 Removing the spurious timestamps from the process log simplifies
35 TF/04 Improved ratelimit ACL condition.
37 The /noupdate option has been deprecated in favour of /readonly which
38 has clearer semantics. The /leaky, /strict, and /readonly update modes
39 are mutually exclusive. The update mode is no longer included in the
40 database key; it just determines when the database is updated. (This
41 means that when you upgrde Exim will forget old rate measurements.)
43 Exim now checks that the per_* options are used with an update mode that
44 makes sense for the current ACL. For example, when Exim is processing a
45 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
46 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
47 must specify per_mail/readonly. If you omit the update mode it defaults to
48 /leaky where that makes sense (as before) or /readonly where required.
50 The /noupdate option is now undocumented but still supported for
51 backwards compatibility. It is equivalent to /readonly except that in
52 ACLs where /readonly is required you may specify /leaky/noupdate or
53 /strict/noupdate which are treated the same as /readonly.
55 A useful new feature is the /count= option. This is a generalization
56 of the per_byte option, so that you can measure the throughput of other
57 aggregate values. For example, the per_byte option is now equivalent
58 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
60 The per_rcpt option has been generalized using the /count= mechanism
61 (though it's more complicated than the per_byte equivalence). When it is
62 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
63 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
64 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
65 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
66 Note that using per_rcpt with a non-readonly update mode in more than
67 one ACL will cause the recipients to be double-counted. (The per_mail
68 and per_byte options don't have this problem.)
70 The handling of very low rates has changed slightly. If the computed rate
71 is less than the event's count (usually one) then this event is the first
72 after a long gap. In this case the rate is set to the same as this event's
73 count, so that the first message of a spam run is counted properly.
75 The major new feature is a mechanism for counting the rate of unique
76 events. The new per_addr option counts the number of different
77 recipients that someone has sent messages to in the last time period. It
78 behaves like per_rcpt if all the recipient addresses are different, but
79 duplicate recipient addresses do not increase the measured rate. Like
80 the /count= option this is a general mechanism, so the per_addr option
81 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
82 example, measure the rate that a client uses different sender addresses
83 with the options per_mail/unique=$sender_address. There are further
84 details in the main documentation.
90 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
92 PP/02 Harmonised TLS library version reporting; only show if debugging.
93 Layout now matches that introduced for other libraries in 4.74 PP/03.
95 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
97 PP/04 New "dns_use_edns0" global option.
99 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
102 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
103 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
105 TK/01 Updated PolarSSL code to 0.14.2.
106 Bugzilla 1097. Patch from Andreas Metzler.
108 PP/07 Catch divide-by-zero in ${eval:...}.
111 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
114 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
115 format-string attack -- SECURITY: remote arbitrary code execution.
117 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
118 time unintentionally subject to list matching rules, letting the header
119 cause arbitrary Exim lookups (of items which can occur in lists, *not*
120 arbitrary string expansion). This allowed for information disclosure.
122 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
123 INT_MIN/-1 -- value coerced to INT_MAX.
129 NM/01 Workround for PCRE version dependency in version reporting
132 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
133 This fixes portability to compilers other than gcc, notably
134 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
136 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
137 makefiles for portability to HP-UX and POSIX correctness.
139 PP/01 Permit LOOKUP_foo enabling on the make command-line.
140 Also via indented variable definition in the Makefile.
141 (Debugging by Oliver Heesakkers).
143 PP/02 Restore caching of spamd results with expanded spamd_address.
144 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
146 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
147 Improves build reliability. Fix from: Frank Elsner
149 NM/02 Fix wide character breakage in the rfc2047 coding
150 Fixes bug 1064. Patch from Andrey N. Oktyabrski
152 NM/03 Allow underscore in dnslist lookups
153 Fixes bug 1026. Patch from Graeme Fowler
155 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
156 Code patches from Adam Ciarcinski of NetBSD.
158 NM/04 Fixed exiqgrep to cope with mailq missing size issue
161 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
162 is logged, to avoid truncation. Patch from John Horne.
164 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
165 Patch from Jakob Hirsch.
167 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
168 SQL string expansion failure details.
169 Patch from Andrey Oktyabrski.
171 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
172 Patch from Simon Arlott.
174 PP/09 New lookups functionality failed to compile on old gcc which rejects
175 extern declarations in function scope.
176 Patch from Oliver Fleischmann
178 PP/10 Use sig_atomic_t for flags set from signal handlers.
179 Check getgroups() return and improve debugging.
180 Fixed developed for diagnosis in bug 927 (which turned out to be
183 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
184 Patch from Mark Zealey.
186 PP/12 Bugzilla 1056: Improved spamd server selection.
187 Patch from Mark Zealey.
189 PP/13 Bugzilla 1086: Deal with maildir quota file races.
190 Based on patch from Heiko Schlittermann.
192 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
193 Patch from Uwe Doering, sign-off by Michael Haardt.
195 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
196 variable declaration deep within a block. Bug and patch from
199 PP/15 lookups-Makefile IRIX compatibilty coercion.
201 PP/16 Make DISABLE_DKIM build knob functional.
203 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
204 Patch by Simon Arlott
206 TF/03 Fix valgrind.h portability to C89 compilers that do not support
207 variable argument macros. Our copy now differs from upstream.
213 TF/01 Failure to get a lock on a hints database can have serious
214 consequences so log it to the panic log.
216 TF/02 Log LMTP confirmation messages in the same way as SMTP,
217 controlled using the smtp_confirmation log selector.
219 TF/03 Include the error message when we fail to unlink a spool file.
221 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
222 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
223 for maintaining out-of-tree patches for some time.
225 PP/01 Bugzilla 139: Documentation and portability issues.
226 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
227 Handle per-OS dynamic-module compilation flags.
229 PP/02 Let /dev/null have normal permissions.
230 The 4.73 fixes were a little too stringent and complained about the
231 permissions on /dev/null. Exempt it from some checks.
232 Reported by Andreas M. Kirchwitz.
234 PP/03 Report version information for many libraries, including
235 Exim version information for dynamically loaded libraries. Created
236 version.h, now support a version extension string for distributors
237 who patch heavily. Dynamic module ABI change.
239 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
240 privilege escalation vulnerability whereby the Exim run-time user
241 can cause root to append content of the attacker's choosing to
244 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
247 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
248 If dropping privileges for untrusted macros, we disabled normal logging
249 on the basis that it would fail; for the Exim run-time user, this is not
250 the case, and it resulted in successful deliveries going unlogged.
251 Fixed. Reported by Andreas Metzler.
257 PP/01 Date: & Message-Id: revert to normally being appended to a message,
258 only prepend for the Resent-* case. Fixes regression introduced in
259 Exim 4.70 by NM/22 for Bugzilla 607.
261 PP/02 Include check_rfc2047_length in configure.default because we're seeing
262 increasing numbers of administrators be bitten by this.
264 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
266 PP/03 Bugzilla 994: added openssl_options main configuration option.
268 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
270 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
272 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
274 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
275 without a peer certificate, leading to a segfault because of an
276 assumption that peers always have certificates. Be a little more
277 paranoid. Problem reported by Martin Tscholak.
279 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
280 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
281 NB: ClamAV planning to remove STREAM in "middle of 2010".
282 CL also introduces -bmalware, various -d+acl logging additions and
283 more caution in buffer sizes.
285 PP/09 Implemented reverse_ip expansion operator.
287 PP/10 Bugzilla 937: provide a "debug" ACL control.
289 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
291 PP/12 Bugzilla 973: Implement --version.
293 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
295 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
297 PP/15 Bugzilla 816: support multiple condition rules on Routers.
299 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
300 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
301 ignore trailing whitespace.
303 JJ/02 prevent non-panic DKIM error from being sent to paniclog
305 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
308 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
309 Notification from Dr Andrew Aitchison.
311 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
312 ExtendedDetectionInfo response format.
313 Notification from John Horne.
315 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
318 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
319 XSL and documented dependency on system catalogs, with examples of how
322 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
325 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
326 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
327 configuration file which is writeable by the Exim user or group.
329 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
330 of configuration files to cover files specified with the -C option if
331 they are going to be used with root privileges, not just the default
334 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
335 option (effectively making it always true).
337 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
338 files to be used while preserving root privileges.
340 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
341 that rogue child processes cannot use them.
343 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
344 run-time user, instead of root.
346 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
347 Exim run-time user without dropping privileges.
349 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
350 result string, instead of calling string_vformat() twice with the same
353 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
354 for other users. Others should always drop root privileges if they use
355 -C on the command line, even for a whitelisted configure file.
357 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
359 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
365 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
366 $data_path, and $header_path variables; fixed documentation bugs and
369 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
370 exipick to access non-standard spools, including the "frozen" queue
373 NM/01 Bugzilla 965: Support mysql stored procedures.
374 Patch from Alain Williams
376 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
378 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
379 Patch from Andreas Metzler
381 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
382 Patch from Kirill Miazine
384 NM/05 Bugzilla 671: Added umask to procmail example.
386 JJ/03 installed exipick 20100323.0, fixing doc bug
388 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
389 directory. Notification and patch from Dan Rosenberg.
391 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
393 TK/02 Improve log output when DKIM signing operation fails.
395 MH/01 Treat the transport option dkim_domain as a colon separated
396 list, not as a single string, and sign the message with each element,
397 omitting multiple occurences of the same signer.
399 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
400 Bugzilla 985, 986. Patch by Simon Arlott
402 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
403 Patch by Simon Arlott
405 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
406 MBX locking. Notification from Dan Rosenberg.
412 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
414 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
416 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
418 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
420 NM/04 Bugzilla 915: Flag broken perl installation during build.
426 TK/01 Added patch by Johannes Berg that expands the main option
427 "spamd_address" if it starts with a dollar sign.
429 TK/02 Write list of recipients to X-Envelope-Sender header when building
430 the mbox-format spool file for content scanning (suggested by Jakob
433 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
434 (http://www.dcc-servers.net/) support via dccifd. Activated by
435 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
437 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
438 by Mark Daniel Reidel <mr@df.eu>.
440 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
441 When building exim an external PCRE library is now needed -
442 PCRE is a system library on the majority of modern systems.
443 See entry on PCRE_LIBS in EDITME file.
445 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
446 conversation. Added nologin parameter to request.
447 Patch contributed by Kirill Miazine.
449 TF/01 Do not log submission mode rewrites if they do not change the address.
451 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
453 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
454 log files in place. Contributed by Roberto Lima.
456 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
458 TF/03 Bugzilla 615: When checking the local_parts router precondition
459 after a local_part_suffix or local_part_prefix option, Exim now
460 does not use the address's named list lookup cache, since this
461 contains cached lookups for the whole local part.
463 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
464 Robert Millan. Documentation is in experimental-spec.txt.
466 TF/04 Bugzilla 668: Fix parallel build (make -j).
468 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
470 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
471 Patch provided by Jan Srzednicki.
473 TF/05 Leading white space used to be stripped from $spam_report which
474 wrecked the formatting. Now it is preserved.
476 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
477 that they are available at delivery time.
479 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
481 TF/08 TLS error reporting now respects the incoming_interface and
482 incoming_port log selectors.
484 TF/09 Produce a more useful error message if an SMTP transport's hosts
485 setting expands to an empty string.
487 NM/06 Bugzilla 744: EXPN did not work under TLS.
488 Patch provided by Phil Pennock.
490 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
491 Patch provided by Richard Godbee.
493 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
494 acl_smtp_notquit, added index entry.
496 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
497 Patch provided by Eugene Bujak.
499 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
500 accept(). Patch provided by Maxim Dounin.
502 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
503 Patch provided by Phil Pennock.
505 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
507 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
508 Patch provided by Brad "anomie" Jorsch.
510 NM/14 Bugzilla 622: Added timeout setting to transport filter.
511 Patch provided by Dean Brooks.
513 TK/05 Add native DKIM support (does not depend on external libraries).
515 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
516 Patch provided by Graeme Fowler.
518 NM/16 Bugzilla 851: Documentation example syntax fix.
520 NM/17 Changed NOTICE file to remove references to embedded PCRE.
522 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
525 NM/19 Bugzilla 745: TLS version reporting.
526 Patch provided by Phil Pennock.
528 NM/20 Bugzilla 167: bool: condition support.
529 Patch provided by Phil Pennock.
531 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
532 clients. Patch provided by Phil Pennock.
534 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
535 Patch provided by Brad "anomie" Jorsch.
537 NM/23 Bugzilla 687: Fix misparses in eximstats.
538 Patch provided by Heiko Schlittermann.
540 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
541 Patch provided by Heiko Schlittermann.
543 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
544 plus update to original patch.
546 NM/26 Bugzilla 799: Documentation correction for ratelimit.
548 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
549 Patch provided by David Brownlee.
551 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
553 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
555 NM/30 Bugzilla 888: TLS documentation bugfixes.
557 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
559 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
560 Unlike the original bugzilla I have changed all shell scripts in src tree.
562 NM/33 Bugzilla 898: Transport filter timeout fix.
563 Patch by Todd Rinaldo.
565 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
566 Patch by Serge Demonchaux.
568 NM/35 Bugzilla 39: Base64 decode bug fixes.
569 Patch by Jakob Hirsch.
571 NM/36 Bugzilla 909: Correct connect() call in dcc code.
573 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
575 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
577 NM/39 Bugzilla 911: Fixed MakeLinks build script.
583 TK/01 Add preliminary DKIM support. Currently requires a forked version of
584 ALT-N's libdkim that I have put here:
585 http://duncanthrax.net/exim-experimental/
587 Note to Michael Haardt: I had to rename some vars in sieve.c. They
588 were called 'true' and it seems that C99 defines that as a reserved
589 keyword to be used with 'bool' variable types. That means you could
590 not include C99-style headers which use bools without triggering
591 build errors in sieve.c.
593 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
594 as mailq or other aliases. Changed the --help handling significantly
595 to do whats expected. exim_usage() emits usage/help information.
597 SC/01 Added the -bylocaldomain option to eximstats.
599 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
601 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
603 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
609 PH/01 Another patch from the Sieve maintainer.
611 PH/02 When an IPv6 address is converted to a string for single-key lookup
612 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
613 dots are used instead of colons so that keys in lsearch files need not
614 contain colons. This was done some time before quoting was made available
615 in lsearch files. However, iplsearch files do require colons in IPv6 keys
616 (notated using the quote facility) so as to distinguish them from IPv4
617 keys. This meant that lookups for IP addresses in host lists did not work
618 for iplsearch lookups.
620 This has been fixed by arranging for IPv6 addresses to be expressed with
621 colons if the lookup type is iplsearch. This is not incompatible, because
622 previously such lookups could never work.
624 The situation is now rather anomolous, since one *can* have colons in
625 ordinary lsearch keys. However, making the change in all cases is
626 incompatible and would probably break a number of configurations.
628 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
631 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
632 conversion specification without a maximum field width, thereby enabling
633 a rogue spamd server to cause a buffer overflow. While nobody in their
634 right mind would setup Exim to query an untrusted spamd server, an
635 attacker that gains access to a server running spamd could potentially
636 exploit this vulnerability to run arbitrary code as the Exim user.
638 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
639 $primary_hostname instead of what libspf2 thinks the hosts name is.
641 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
642 a directory entry by the name of the lookup key. Previously, if a
643 symlink pointed to a non-existing file or a file in a directory that
644 Exim lacked permissions to read, a lookup for a key matching that
645 symlink would fail. Now it is enough that a matching directory entry
646 exists, symlink or not. (Bugzilla 503.)
648 PH/03 The body_linecount and body_zerocount variables are now exported in the
651 PH/04 Added the $dnslist_matched variable.
653 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
654 This means they are set thereafter only if the connection becomes
657 PH/06 Added the client_condition to authenticators so that some can be skipped
658 by clients under certain conditions.
660 PH/07 The error message for a badly-placed control=no_multiline_responses left
661 "_responses" off the end of the name.
663 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
665 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
666 (without spaces) instead of just copying the configuration text.
668 PH/10 Added the /noupdate option to the ratelimit ACL condition.
670 PH/11 Added $max_received_linelength.
672 PH/12 Added +ignore_defer and +include_defer to host lists.
674 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
675 way in which PCRE > 7.0 is built.
677 PH/14 Implemented queue_only_load_latch.
679 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
680 MAIL command. The effect was to mangle the value on 64-bit systems.
682 PH/16 Another patch from the Sieve maintainer.
684 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
686 PH/18 If a system quota error occurred while trying to create the file for
687 a maildir delivery, the message "Mailbox is full" was not appended to the
688 bounce if the delivery eventually timed out. Change 4.67/27 below applied
689 only to a quota excession during the actual writing of the file.
691 PH/19 It seems that peer DN values may contain newlines (and other non-printing
692 characters?) which causes problems in log lines. The DN values are now
693 passed through string_printing() before being added to log lines.
695 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
696 and InterBase are left for another time.)
698 PH/21 Added message_body_newlines option.
700 PH/22 Guard against possible overflow in moan_check_errorcopy().
702 PH/23 POSIX allows open() to be a macro; guard against that.
704 PH/24 If the recipient of an error message contained an @ in the local part
705 (suitably quoted, of course), incorrect values were put in $domain and
706 $local_part during the evaluation of errors_copy.
712 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
713 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
716 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
717 issue a MAIL command.
719 PH/02 In an ACL statement such as
721 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
723 if a client was not listed at all, or was listed with a value other than
724 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
725 the condition was not true (as it should be), so access was not denied.
726 The bug was that the ! inversion was incorrectly passed on to the second
727 item. This has been fixed.
729 PH/03 Added additional dnslists conditions == and =& which are different from
730 = and & when the dns lookup returns more than one IP address.
732 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
733 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
735 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
736 FSYNC, which compiles an option called disable_fsync that allows for
737 bypassing fsync(). The documentation is heavily laced with warnings.
739 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
741 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
742 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
743 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
744 including adding "make clean"; (3) Added -fPIC when compiling the test
745 dynamically loaded module, to get rid of a warning.
747 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
748 message fails, move_frozen_messages = true and ignore_bounce_errors_after
749 = 0s. The bug is otherwise harmless.
751 PH/07 There was a bug in the dovecot authenticator such that the value of
752 $auth1 could be overwritten, and so not correctly preserved, after a
753 successful authentication. This usually meant that the value preserved by
754 the server_setid option was incorrect.
756 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
758 PH/09 Installed PCRE release 7.0.
760 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
761 run for batched SMTP input. It is now run at the start of every message
762 in the batch. While fixing this I discovered that the process information
763 (output by running exiwhat) was not always getting set for -bs and -bS
764 input. This is fixed, and it now also says "batched" for BSMTP.
766 PH/11 Added control=no_pipelining.
768 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
769 patch, slightly modified), and move the expansion of helo_data till after
770 the connection is made in the smtp transport (so it can use these
773 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
775 PH/14 Added log_selector = +pid.
777 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
779 PH/16 Add ${if forany and ${if forall.
781 PH/17 Added dsn_from option to vary the From: line in DSNs.
783 PH/18 Flush SMTP output before performing a callout, unless control =
784 no_callout_flush is set.
786 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
787 was true (the default) a successful delivery failed to delete the retry
788 item, thus causing premature timeout of the address. The bug is now
791 PH/20 Added hosts_avoid_pipelining to the smtp transport.
793 PH/21 Long custom messages for fakedefer and fakereject are now split up
794 into multiline reponses in the same way that messages for "deny" and
795 other ACL rejections are.
797 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
798 with slight modification.
800 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
801 draft, changing the syntax and factoring some duplicate code".
803 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
804 for deliveries of the second and subsequent messages over the same SMTP
807 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
808 ${reduce, with only minor "tidies".
810 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
812 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
813 expansion side effects.
815 PH/27 When a message times out after an over-quota error from an Exim-imposed
816 quota, the bounce message says "mailbox is full". This message was not
817 being given when it was a system quota that was exceeded. It now should
820 MH/03 Made $recipients available in local_scan(). local_scan() already has
821 better access to the recipient list through recipients_list[], but
822 $recipients can be useful in postmaster-provided expansion strings.
824 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
825 in the case of a MAIL command with additional options following the
826 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
827 were accidentally chopped off.
829 PH/29 SMTP synchronization checks are implemented when a command is read -
830 there is a check that no more input is waiting when there shouldn't be
831 any. However, for some commands, a delay in an ACL can mean that it is
832 some time before the response is written. In this time, more input might
833 arrive, invalidly. So now there are extra checks after an ACL has run for
834 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
835 pipelining has not been advertised.
837 PH/30 MH's patch to allow iscntrl() characters to be list separators.
839 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
840 returned in the SMTP response when smtp_return_error_details was false.
843 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
844 instead of the C I/O that was originally supplied, because problems were
847 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
848 Exim which did not show up earlier: it was assuming that a call to
849 SSL_CTX_set_info_callback() might give an error value. In fact, there is
850 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
851 was a macro that became an assignment, so it seemed to work. This has
852 changed to a proper function call with a void return, hence the compile
853 error. Exim's code has been fixed.
855 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
858 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
860 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
862 PH/37 If a message is not accepted after it has had an id assigned (e.g.
863 because it turns out to be too big or there is a timeout) there is no
864 "Completed" line in the log. When some messages of this type were
865 selected by exigrep, they were listed as "not completed". Others were
866 picked up by some special patterns. I have improved the selection
867 criteria to be more general.
869 PH/38 The host_find_failed option in the manualroute router can now be set
870 to "ignore", to completely ignore a host whose IP address cannot be
871 found. If all hosts are ignored, the behaviour is controlled by the new
872 host_all_ignored option.
874 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
875 homing or because of multiple MX records with /mx) generated more than
876 one IP address, and the following item turned out to be the local host,
877 all the secondary addresses of the first item were incorrectly removed
878 from the list, along with the local host and any following hosts (which
879 is what is supposed to happen).
881 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
882 whoever called Exim into the -H file. In the case of the daemon it was
883 behaving confusingly. When first started, it used values for whoever
884 started the daemon, but after a SIGHUP it used the Exim user (because it
885 calls itself on a restart). I have changed the code so that it now always
888 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
889 message are rejected with the same error (e.g. no authentication or bad
890 sender address), and a DATA command is nevertheless sent (as can happen
891 with PIPELINING or a stupid MUA), the error message that was given to the
892 RCPT commands is included in the rejection of the DATA command. This is
893 intended to be helpful for MUAs that show only the final error to their
896 PH/42 Another patch from the Sieve maintainer.
898 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
899 Eximstats - Fixed some broken HTML links and added missing column headers
901 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
902 columns for Rejects, Temp Rejects, Ham, and Spam rows.
904 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
906 PH/43 Yet another patch from the Sieve maintainer.
908 PH/44 I found a way to check for a TCP/IP connection going away before sending
909 the response to the final '.' that terminates a message, but only in the
910 case where the client has not sent further data following the '.'
911 (unfortunately, this is allowed). However, in many cases there won't be
912 any further data because there won't be any more messages to send. A call
913 to select() can be used: if it shows that the input is "ready", there is
914 either input waiting, or the socket has been closed. An attempt to read
915 the next input character can distinguish the two cases. Previously, Exim
916 would have sent an OK response which the client would never have see.
917 This could lead to message repetition. This fix should cure that, at
918 least in a lot of common cases.
920 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
921 advertised in response to EHLO.
927 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
928 fixed by 4.65/MH/01 (is this a record?) are fixed:
930 (i) An empty string was always treated as zero by the numeric comparison
931 operators. This behaviour has been restored.
933 (ii) It is documented that the numeric comparison operators always treat
934 their arguments as decimal numbers. This was broken in that numbers
935 starting with 0 were being interpreted as octal.
937 While fixing these problems I realized that there was another issue that
938 hadn't been noticed. Values of message_size_limit (both the global option
939 and the transport option) were treated as octal if they started with 0.
940 The documentation was vague. These values are now always treated as
941 decimal, and I will make that clear in the documentation.
947 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
948 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
951 MH/01 Don't check that the operands of numeric comparison operators are
952 integers when their expansion is in "skipping" mode (fixes bug
953 introduced by 4.64-PH/07).
955 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
956 child addresses, Exim now panics and dies. Previously, because the count
957 is held in a short int, deliveries were likely to be lost. As such a
958 large number of recipients for a single message is ridiculous
959 (performance will be very, very poor), I have chosen to impose a limit
960 rather than extend the field.
966 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
967 leftover -K file (the existence of which was triggered by #402).
968 While we were at it, introduced process PID as part of the -K
969 filename. This should rule out race conditions when creating
972 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
973 processing considerably. Previous code took too long for large mails,
974 triggering a timeout which in turn triggers #401.
976 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
977 in the DK code in transports.c. sendfile() is not really portable,
978 hence the _LINUX specificness.
980 TF/01 In the add_headers option to the mail command in an Exim filter,
981 there was a bug that Exim would claim a syntax error in any
982 header after the first one which had an odd number of characters
985 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
986 callout verification, Exim cached a "reject" for the entire domain. This
987 is correct for most verifications, but it is not correct for a recipient
988 verification with use_sender or use_postmaster set, because in that case
989 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
990 case of MAIL FROM:<> rejection from other early rejections (e.g.
991 rejection of HELO). When verifying a recipient using a non-null MAIL
992 address, the cache is ignored if it shows MAIL FROM:<> rejection.
993 Whatever the result of the callout, the value of the domain cache is
994 left unchanged (for any other kind of callout, getting as far as trying
995 RCPT means that the domain itself is ok).
997 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1000 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1001 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1002 session, the daemon ignores ECONNECT errors and logs others; it now
1003 ignores EPIPE as well.
1005 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1006 (quoted-printable decoding).
1008 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1009 later the small subsequent patch to fix an introduced bug.
1011 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1013 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1015 PH/08 An error is now given if message_size_limit is specified negative.
1017 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1018 to be given (somewhat) arbitrary names.
1020 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1023 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1024 miscellaneous code fixes
1026 PH/10 Added the log_reject_target ACL modifier to specify where to log
1029 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1030 hostname. This is wrong, because it relates to the incoming message (and
1031 probably the interface on which it is arriving) and not to the outgoing
1032 callout (which could be using a different interface). This has been
1033 changed to use the value of the helo_data option from the smtp transport
1034 instead - this is what is used when a message is actually being sent. If
1035 there is no remote transport (possible with a router that sets up host
1036 addresses), $smtp_active_hostname is used.
1038 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1039 tweaks were necessary in order to get it to work (see also 21 below):
1040 (a) The code assumed that strncpy() returns a negative number on buffer
1041 overflow, which isn't the case. Replaced with Exim's string_format()
1043 (b) There were several signed/unsigned issues. I just did the minimum
1044 hacking in of casts. There is scope for a larger refactoring.
1045 (c) The code used strcasecmp() which is not a standard C function.
1046 Replaced with Exim's strcmpic() function.
1047 (d) The code set only $1; it now sets $auth1 as well.
1048 (e) A simple test gave the error "authentication client didn't specify
1049 service in request". It would seem that Dovecot has changed its
1050 interface. Fortunately there's a specification; I followed it and
1051 changed what the client sends and it appears to be working now.
1053 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1056 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1057 address A is aliased to B and C, where B exists and C does not. Without
1058 -v the output is "A verified" because verification stops after a
1059 successful redirection if more than one address is generated. However,
1060 with -v the child addresses are also verified. Exim was outputting "A
1061 failed to verify" and then showing the successful verification for C,
1062 with its parentage. It now outputs "B failed to verify", showing B's
1063 parentage before showing the successful verification of C.
1065 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1066 look up a TXT record in a specific list after matching in a combined
1069 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1070 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1071 they consult the DNS. I had assumed they would set it the way they
1072 wanted; and indeed my experiments on Linux seem to show that in some
1073 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1074 To be on the safe side, however, I have now made the interface to
1075 host_find_byname() similar to host_find_bydns(), with an argument
1076 containing the DNS resolver options. The host_find_byname() function now
1077 sets these options at its start, just as host_find_bydns() does. The smtp
1078 transport options dns_qualify_single and dns_search_parents are passed to
1079 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1080 of host_find_byname() use the default settings of RES_DEFNAMES
1081 (qualify_single) but not RES_DNSRCH (search_parents).
1083 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1084 spool_read_header() do less string testing, by means of a preliminary
1085 switch on the second character of optional "-foo" lines. (This is
1086 overdue, caused by the large number of possibilities that now exist.
1087 Originally there were few.) While I was there, I also converted the
1088 str(n)cmp tests so they don't re-test the leading "-" and the first
1089 character, in the hope this might squeeze out yet more improvement.
1091 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1092 flag allowing group syntax was set by the header_syntax check but not
1093 turned off, possible causing trouble later; (2) The flag was not being
1094 set at all for the header_verify test, causing "group"-style headers to
1095 be rejected. I have now set it in this case, and also caused header_
1096 verify to ignore an empty address taken from a group. While doing this, I
1097 came across some other cases where the code for allowing group syntax
1098 while scanning a header line wasn't quite right (mostly, not resetting
1099 the flag correctly in the right place). These bugs could have caused
1100 trouble for malformed header lines. I hope it is now all correct.
1102 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1103 with the "reply" argument non-NULL. The code, however (which originally
1104 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1105 but it didn't always do it. This confused somebody who was copying the
1106 code for some other use. I have removed all the tests.
1108 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1109 feature that was used to support insecure browsers during the U.S. crypto
1110 embargo. It requires special client support, and Exim is probably the
1111 only MTA that supported it -- and would never use it because real RSA is
1112 always available. This code has been removed, because it had the bad
1113 effect of slowing Exim down by computing (never used) parameters for the
1114 RSA_EXPORT functionality.
1116 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1117 authenticator to fail if there's a tab character in the incoming data
1118 (there should never be unless someone is messing about, as it's supposed
1119 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1120 if the connection is using TLS or if the remote IP is the same as the
1121 local IP, and the "valid-client-cert option" if a client certificate has
1124 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1125 authenticators. This can be used for authorization after authentication
1126 succeeds. (In the case of plaintext, it servers for both authentication
1129 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1130 if any retry times were supplied.
1132 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1133 connection, where there is no client IP address to check. In this
1134 situation, the verify now always succeeds.
1136 PH/25 Applied John Jetmore's -Mset patch.
1138 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1140 PH/27 In a string expansion for a processed (not raw) header when multiple
1141 headers of the same name were present, leading whitespace was being
1142 removed from all of them, but trailing whitespace was being removed only
1143 from the last one. Now trailing whitespace is removed from each header
1144 before concatenation. Completely empty headers in a concatenation (as
1145 before) are ignored.
1147 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1148 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1150 PH/29 [Removed. This was a change that I later backed out, and forgot to
1151 correct the ChangeLog entry (that I had efficiently created) before
1152 committing the later change.]
1154 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1155 address errors (4xx response to RCPT) over the same connection as other
1156 messages routed to the same hosts. Such deliveries are always "forced",
1157 so retry times are not inspected. This resulted in far too many retries
1158 for the affected addresses. The effect occurred only when there were more
1159 hosts than the hosts_max_try setting in the smtp transport when it had
1160 the 4xx errors. Those hosts that it had tried were not added to the list
1161 of hosts for which the message was waiting, so if all were tried, there
1162 was no problem. Two fixes have been applied:
1164 (i) If there are any address or message errors in an SMTP delivery, none
1165 of the hosts (tried or untried) are now added to the list of hosts
1166 for which the message is waiting, so the message should not be a
1167 candidate for sending over the same connection that was used for a
1168 successful delivery of some other message. This seems entirely
1169 reasonable: after all the message is NOT "waiting for some host".
1170 This is so "obvious" that I'm not sure why it wasn't done
1171 previously. Hope I haven't missed anything, but it can't do any
1172 harm, as the worst effect is to miss an optimization.
1174 (ii) If, despite (i), such a delivery is accidentally attempted, the
1175 routing retry time is respected, so at least it doesn't keep
1176 hammering the server.
1178 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1179 in ${readsocket because some servers need this prod.
1181 PH/32 Added some extra debug output when updating a wait-xxx database.
1183 PH/33 The hint "could be header name not terminated by colon", which has been
1184 given for certain expansion errors for a long time, was not being given
1185 for the ${if def:h_colon_omitted{... case.
1187 PH/34 The spec says: "With one important exception, whenever a domain list is
1188 being scanned, $domain contains the subject domain." There was at least
1189 one case where this was not true.
1191 PH/35 The error "getsockname() failed: connection reset by peer" was being
1192 written to the panic log as well as the main log, but it isn't really
1193 panic-worthy as it just means the connection died rather early on. I have
1194 removed the panic log writing for the ECONNRESET error when getsockname()
1197 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1198 runs only) independently of the message's sender address. This meant
1199 that, if the 4xx error was in fact related to the sender, a different
1200 message to the same recipient with a different sender could confuse
1201 things. In particualar, this can happen when sending to a greylisting
1202 server, but other circumstances could also provoke similar problems.
1203 I have changed the default so that the retry time for these errors is now
1204 based a combination of the sender and recipient addresses. This change
1205 can be overridden by setting address_retry_include_sender=false in the
1208 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1209 remote server are returned as part of bounce messages. This was not
1210 happening for LMTP over a pipe (the lmtp transport), but now it is the
1211 same for both kinds of LMTP.
1213 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1214 in header lines that were in fact CNAMEs. This is no longer the case.
1216 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1217 and queue runs started by the daemon processed all messages. This has
1218 been fixed so that -R and -S can now usefully be given with -q<time>.
1220 PH/40 Import PCRE release 6.7 (fixes some bugs).
1222 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1224 PH/42 Give an error if -q is specified more than once.
1226 PH/43 Renamed the variables $interface_address and $interface_port as
1227 $received_ip_address and $received_port, to make it clear that these
1228 values apply to message reception, and not to the outgoing interface when
1229 a message is delivered. (The old names remain recognized, of course.)
1231 PH/44 There was no timeout on the connect() call when using a Unix domain
1232 socket in the ${readsocket expansion. There now is.
1234 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1235 be meaningful with "accept".
1237 SC/01 Eximstats V1.43
1238 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1240 SC/02 Eximstats V1.44
1241 Use a glob alias rather than an array ref in the generated
1242 parser. This improves both readability and performance.
1244 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1245 Collect SpamAssassin and rejection statistics.
1246 Don't display local sender or destination tables unless
1247 there is data to show.
1248 Added average volumes into the top table text output.
1250 SC/04 Eximstats V1.46
1251 Collect data on the number of addresses (recipients)
1252 as well as the number of messages.
1254 SC/05 Eximstats V1.47
1255 Added 'Message too big' to the list of mail rejection
1256 reasons (thanks to Marco Gaiarin).
1258 SC/06 Eximstats V1.48
1259 Mainlog lines which have GMT offsets and are too short to
1260 have a flag are now skipped.
1262 SC/07 Eximstats V1.49 (Alain Williams)
1263 Added the -emptyok flag.
1265 SC/08 Eximstats V1.50
1266 Fixes for obtaining the IP address from reject messages.
1268 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1269 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1270 whitesspace changes from 4.64-PH/27
1272 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1275 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1276 are found, allow negative numbers in numeric criteria)
1278 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1280 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1281 to match changes made in 4.64-PH/43
1283 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1285 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1286 "domain" is actually an IP address, and force a failure. This locks out
1287 those revolvers/nameservers that support "A-for-A" lookups, in
1288 contravention of the specifications.
1290 PH/48 When a host name was looked up from an IP address, and the subsequent
1291 forward lookup of the name timed out, the host name was left in
1292 $sender_host_name, contrary to the specification.
1294 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1295 restricted to single-key lookups, Exim was not diagnosing an error if
1296 * or *@ was used with a query-style lookup.
1298 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1300 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1301 long ago, but noone interested enough thought of it. Let's just say that
1302 the "1.1" means that there are some new functions that weren't there at
1303 some point in the past.
1305 PH/51 Error processing for expansion failure of helo_data from an smtp
1306 transport during callout processing was broken.
1308 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1309 tested/used via the -bh/-bhc/-bs options.
1311 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1312 bug, fixed in subsequent PCRE releases).
1314 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1315 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1317 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1323 SC/01 Use a glob alias rather than an array ref in eximstats generated
1324 parser. This improves both readability and performance.
1326 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1327 Don't display local sender or destination tables in eximstats unless
1328 there is data to show.
1329 Added average volumes into the eximstats top table text output.
1331 SC/03 Collect data on the number of addresses (recipients) as well
1332 as the number of messages in eximstats.
1334 TF/01 Correct an error in the documentation for the redirect router. Exim
1335 does (usually) call initgroups() when daemonizing.
1337 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1338 with consistent privilege compared to when running as a daemon.
1340 TF/03 Note in the spec that $authenticated_id is not set for local
1341 submissions from trusted users.
1343 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1344 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1346 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1347 by adding some example configuration directives to the default
1348 configuration file. A little bit of work is required to uncomment the
1349 directives and define how usernames and passwords are checked, but
1350 there is now a framework to start from.
1352 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1353 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1354 without this. I don't know how relevant this is to other LDAP libraries.
1356 PH/02 Add the verb name to the "unknown ACL verb" error.
1358 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1360 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1362 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1363 directory not expanded when it should be if an expanded home directory
1364 was set for the address (which is overridden by the transport).
1366 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1369 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1370 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1371 because it is too late at that time, and has no effect.
1373 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1374 security issue with \' (bugzilla #107). I could not use the
1375 PQescapeStringConn() function, because it needs a PGconn value as one of
1378 PH/08 When testing addresses using -bt, indicate those final addresses that
1379 are duplicates that would not cause an additional delivery. At least one
1380 person was confused, thinking that -bt output corresponded to deliveries.
1381 (Suppressing duplicates isn't a good idea as you lose the information
1382 about possibly different redirections that led to the duplicates.)
1384 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1385 systems where poll() doesn't work, in particular OS X.
1387 PH/10 Added more information to debugging output for retry time not reached.
1389 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1390 operations in malware.c.
1392 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1395 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1396 syslog_duplication set false, log lines that would normally be written
1397 both the the main log and to the reject log were not written to syslog at
1400 PH/14 In the default configuration, change the use of "message" in ACL warn
1401 statements to "add_header".
1403 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1404 not followed by a command (e.g. "seen endif").
1406 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1407 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1410 PH/17 Added extra conditions to the default value of delay_warning_condition
1414 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1415 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1416 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1419 The Auto-Submitted: and various List- headers are standardised, whereas I
1420 don't think Precedence: ever was.
1422 PH/18 Refactored debugging code in route_finduser() to show more information,
1423 in particular, the error code if getpwnam() issues one.
1425 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1426 This is apparently needed in addition to the PH/07 change above to avoid
1427 any possible encoding problems.
1429 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1430 but not after initializing Perl.
1432 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1433 output them only if debugging. By default they are written stderr,
1434 apparently, which is not desirable.
1436 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1439 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1442 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1444 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1445 authenticated or an ident call has been made. Suppress the default
1446 values for $authenticated_id and $authenticated_sender (but permit -oMai
1447 and -oMas) when testing with -bh.
1449 PH/24 Re-jigged the order of the tests in the default configuration so that the
1450 tests for valid domains and recipients precede the DNS black list and CSA
1451 tests, on the grounds that those ones are more expensive.
1453 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1454 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1455 This bug exists in every version of Exim that I still have, right back to
1458 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1459 However, an attempt to turn on case-sensitivity in a regex key by
1460 including (?-i) didn't work because the subject string was already
1461 lowercased, and the effects were non-intuitive. It turns out that a
1462 one-line patch can be used to allow (?-i) to work as expected.
1468 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1469 other effects) broke the use of negated acl sub-conditions.
1471 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1474 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1475 "Deny" causes Exim to reject the incoming connection with a 554 error.
1476 Unfortunately, if there is a major crisis, such as a disk failure,
1477 tcp-wrappers gives "deny", whereas what one would like would be some
1478 kind of temporary error. A kludge has been added to help with this.
1479 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1480 554 error is used if errno is still zero or contains ENOENT (which occurs
1481 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1484 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1486 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1487 errors. Otherwise a message that provokes a temporary error (when other
1488 messages do not) can cause a whole host to time out.
1490 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1491 addresses were routed directly to files or pipes from a redirect router.
1492 File deliveries just didn't batch; pipe deliveries might have suffered
1495 PH/06 A failure to get a lock for a hints database would erroneously always say
1496 "Failed to get write lock", even when it was really a read lock.
1498 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1499 of 0600. This has been changed to use the value of the lockfile_mode
1500 option (which defaults to 0600).
1502 PH/08 Applied small patch from the Sieve maintainer.
1504 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1505 folder from quota calculations, a direct delivery into this folder messed
1506 up the contents of the maildirsize file. This was because the regex was
1507 used only to exclude .Trash (or whatever) when the size of the mailbox
1508 was calculated. There was no check that a delivery was happening into an
1509 excluded directory. This bug has been fixed by ignoring all quota
1510 processing for deliveries into excluded directories.
1512 PH/10 Added the maildirfolder_create_regex option to appendfile.
1518 PH/01 The code for finding all the local interface addresses on a FreeBSD
1519 system running IPv6 was broken. This may well have applied to all BSD
1520 systems, as well as to others that have similar system calls. The broken
1521 code found IPv4 interfaces correctly, but gave incorrect values for the
1522 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1523 that it would not match correctly against @[] and not recognize the IPv6
1526 PH/02 The ipliteral router was not recognizing addresses of the form user@
1527 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1529 PH/03 Added disable_ipv6.
1531 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1532 decoded form, because it is most often used to construct To: headers
1533 lines in autoreplies, and the decoded form may well be syntactically
1534 invalid. However, $reply_address has leading white space removed, and all
1535 newlines turned into spaces so that the autoreply transport does not
1538 PH/05 If group was specified without a user on a router, and no group or user
1539 was specified on a transport, the group from the router was ignored.
1541 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1542 for visible compile-time settings that can be used to change these
1543 numbers, for those that want even more. Backwards compatibility with old
1544 spool files has been maintained. However, going back to a previous Exim
1545 release will lost any variables that are in spool files.
1547 PH/07 Two small changes when running in the test harness: increase delay when
1548 passing a TCP/IP connection to a new process, in case the original
1549 process has to generate a bounce, and remove special handling of
1550 127.0.0.2 (sic), which is no longer necessary.
1552 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1553 be the same on different OS.
1555 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1558 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1559 whether --show-vars was specified or not
1561 JJ/02 exipick: Added support for new ACL variable spool format introduced
1564 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1565 syntactically invalid From: or Reply-to: line, and a filter used this to
1566 generate an autoreply, and therefore failed to obtain an address for the
1567 autoreply, Exim could try to deliver to a non-existent relative file
1568 name, causing unrelated and misleading errors. What now happens is that
1569 it logs this as a hard delivery error, but does not attempt to create a
1572 PH/11 The exinext utility has a -C option for testing purposes, but although
1573 the given file was scanned by exinext itself; it wasn't being passed on
1574 when Exim was called.
1576 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1577 an end-of-file indication when reading a command response.
1579 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1580 compiled. In many other places in Exim, IPv6 addresses are always
1581 recognized, so I have changed this. It also means that IPv4 domain
1582 literals of the form [IPV4:n.n.n.n] are now always recognized.
1584 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1585 used if the router is not running as root, for example, when verifying at
1586 ACL time, or when using -bh. The debugging output from this situation was
1587 non-existent - all you got was a failure to exec. I have made two
1590 (a) Failures to set uid/gid, the current directory, or a process leader
1591 in a subprocess such as that created by queryprogram now generate
1592 suitable debugging ouput when -d is set.
1594 (b) The queryprogram router detects when it is not running as root,
1595 outputs suitable debugging information if -d is set, and then runs
1596 the subprocess without attempting to change uid/gid.
1598 PH/15 Minor change to Makefile for building test_host (undocumented testing
1601 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1602 additional section of a DNS packet that returns MX or SRV records.
1603 Instead, it always explicitly searches for A/AAAA records. This avoids
1604 major problems that occur when a DNS server includes only records of one
1605 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1606 fixed another bug: if SRV records were looked up and the corresponding
1607 address records were *not* found in the additional section, the port
1608 values from the SRV records were lost.
1610 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1611 using the correct key (the original address) when searching the retry
1612 rules in order to find which one to use for generating the retry hint.
1614 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1615 adding the default one. Similarly, if it contains a Reply-To: header, the
1616 errors_reply_to option, if set, is not used.
1618 PH/19 When calculating a retry time, Exim used to measure the "time since
1619 failure" by looking at the "first failed" field in the retry record. Now
1620 it does not use this if it is later than than the arrival time of the
1621 message. Instead it uses the arrival time. This makes for better
1622 behaviour in cases where some deliveries succeed, thus re-setting the
1623 "first failed" field. An example is a quota failure for a huge message
1624 when small messages continue to be delivered. Without this change, the
1625 "time since failure" will always be short, possible causing more frequent
1626 delivery attempts for the huge message than are intended.
1627 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1629 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1630 $1, $2, $3) because the numerical variables can be reset during some
1631 expansion items (e.g. "match"), thereby losing the authentication data.
1633 PH/21 Make -bV show the size of off_t variables so that the test suite can
1634 decide whether to run tests for quotas > 2G.
1636 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1637 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1638 filecount value is greater than 2G or if a quota value is greater than 2G
1639 on a system where the size of off_t is not greater than 4, a panic error
1642 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1643 never match. The debug and -bh output now contains an explicit error
1644 message indicating a malformed IPv4 address or mask.
1646 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1647 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1648 PH/23 above applies.
1650 PH/25 Do not write to syslog when running in the test harness. The only
1651 occasion when this arises is a failure to open the main or panic logs
1652 (for which there is an explicit test).
1654 PH/26 Added the /no_tell option to "control=freeze".
1656 PH/27 If a host name lookup failed very early in a connection, for example, if
1657 the IP address matched host_lookup and the reverse lookup yielded a name
1658 that did not have a forward lookup, an error message of the form "no IP
1659 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1660 could be logged. Now it outputs the IP address instead of "NULL".
1662 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1663 allows the sender and the authenticated sender to be set when
1664 submitting a message from within Exim. Since child_open_exim() is
1665 documented for local_scan(), the new function should be too.
1667 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1668 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1669 results in an empty string is now treated as unset.
1671 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1673 PH/31 Added sender_verify_fail logging option.
1675 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1676 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1677 tidied the source and removed it altogether.
1679 PH/33 When a queue run was abandoned because the load average was too high, a
1680 log line was always written; now it is written only if the queue_run log
1681 selector is set. In addition, the log line for abandonment now contains
1682 information about the queue run such as the pid. This is always present
1683 in "start" and "stop" lines but was omitted from the "abandon" line.
1685 PH/34 Omit spaces between a header name and the colon in the error message that
1686 is given when verify = headers_syntax fails (if there are lots of them,
1687 the message gets confusing).
1689 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1690 names, as there are now some PTR records that contain slashes. This check
1691 is only to protect against broken name servers that fall over on strange
1692 characters, so the fact that it applies to all lookups doesn't matter.
1694 PH/36 Now that the new test suite is complete, we can remove some of the
1695 special code in Exim that was needed for the old test suite. For example,
1696 sorting DNS records because real resolvers return them in an arbitrary
1697 order. The new test suite's fake resolver always returns records in the
1700 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1701 bounces) except when queue_only is set, to avoid logging races between
1702 the different processes.
1704 PH/38 Panic-die if .include specifies a non-absolute path.
1706 PH/39 A tweak to the "H" retry rule from its user.
1708 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1709 a label. They prevented compilation on older perls.
1711 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1712 a warning to be raised on newish perls.
1714 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1715 on queue. Changes to match documented behaviour of showing count of
1716 messages matching specified criteria.
1718 PH/40 Changed the default ident timeout from 30s to 5s.
1720 PH/41 Added support for the use of login_cap features, on those BSD systems
1721 that have them, for controlling the resources used by pipe deliveries.
1723 PH/42 The content-scanning code uses fopen() to create files in which to put
1724 message data. Previously it was not paying any attention to the mode of
1725 the files. Exim runs with umask(0) because the rest of the code creates
1726 files with open(), and sets the required mode explicitly. Thus, these
1727 files were ending up world-writeable. This was not a big issue, because,
1728 being within the spool directory, they were not world-accessible. I have
1729 created a function called modefopen, which takes an additional mode
1730 argument. It sets umask(777), creates the file, chmods it to the required
1731 mode, then resets the umask. All the relevant calls to fopen() in the
1732 content scanning code have been changed to use this function.
1734 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1735 to 24 hours. This avoids potential overflow problems when processing G
1736 and H retry rules. I suspect nobody ever tinkers with this value.
1738 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1740 PH/45 When the plaintext authenticator is running as a client, the server's
1741 challenges are checked to ensure they are valid base64 strings. By
1742 default, the authentication attempt is cancelled if an invalid string is
1743 received. Setting client_ignore_invalid_base64 true ignores these errors.
1744 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1745 they are received. Thus, the responses can be made to depend on the
1746 challenges. If an invalid string is ignored, an empty string is placed in
1749 PH/46 Messages that are created by the autoreply transport now contains a
1750 References: header, in accordance with RFCs 2822 and 3834.
1752 PH/47 Added authenticated_sender_force to the smtp transport.
1754 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1756 PH/49 Installed latest patch from the Sieve maintainer.
1758 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1759 was also set, the appendfile transport was unnecessarily scanning a
1760 directory of message files (e.g. for maildir delivery) to find the count
1761 of files (along with the size), even though it did not need this
1762 information. It now does the scan only if it needs to find either the
1763 size of the count of files.
1765 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1767 PH/52 Two bugs concerned with error handling when the smtp transport is
1770 (i) Exim was not creating retry information for temporary errors given
1771 for individual recipients after the DATA command when the smtp transport
1772 was used in LMTP mode. This meant that they could be retried too
1773 frequently, and not timed out correctly.
1775 (ii) Exim was setting the flag that allows error details to be returned
1776 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1777 recipients that were returned after the DATA command.
1779 PH/53 This is related to PH/52, but is more general: for any failing address,
1780 when detailed error information was permitted to be returned to the
1781 sender, but the error was temporary, then after the final timeout, only
1782 "retry timeout exceeded" was returned. Now it returns the full error as
1783 well as "retry timeout exceeded".
1785 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1786 do this, and (what is worse) MTAs that accept it.
1788 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1789 will now be deprecated.
1791 PH/56 New os.c-cygwin from the Cygwin maintainer.
1793 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1794 formats (previously only available in exim formats via -bpr, -bpru,
1795 and -bpra. Now also available in native and exiqgrep formats)
1797 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1798 with very large, slow to parse queues
1800 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1802 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1804 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1805 responses to authentication challenges, though it was showing the
1806 challenges; (ii) I've removed the CR characters from the debug output for
1809 PH/58 Allow for the insertion of a newline as well as a space when a string
1810 is turned into more than one encoded-word during RFC 2047 encoding. The
1811 Sieve code now uses this.
1813 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1814 data_4xx, lost_connection, tls_required.
1816 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1817 message was being sent as an SMTP response.
1819 PH/61 Add -l and -k options to exicyclog.
1821 PH/62 When verifying, if an address was redirected to one new address, so that
1822 verification continued, and the new address failed or deferred after
1823 having set something in $address_data, the value of $address_data was not
1824 passed back to the ACL. This was different to the case when no
1825 redirection occurred. The value is now passed back in both cases.
1827 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1828 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1829 use login_cap.h, so on its own it isn't the distinguishing feature. The
1830 new name refers directly to the setclassresources() function.
1832 PH/65 Added configuration files for NetBSD3.
1834 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1836 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1837 is preferred over IPv4.
1839 PH/68 The bounce_return_message and bounce_return_body options were not being
1840 honoured for bounces generated during the reception of non-SMTP messages.
1841 In particular, this applied to messages rejected by the ACL. This bug has
1842 been fixed. However, if bounce_return_message is true and bounce_return_
1843 body is false, the headers that are returned for a non-SMTP message
1844 include only those that have been read before the error was detected.
1845 (In the case of an ACL rejection, they have all been read.)
1847 PH/69 The HTML version of the specification is now built in a directory called
1848 spec_html instead of spec.html, because the latter looks like a path with
1849 a MIME-type, and this confuses some software.
1851 PH/70 Catch two compiler warnings in sieve.c.
1853 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1854 function verify_get_ident() calls ip_connect() to connect a socket, but
1855 if the "connect()" function timed out, ip_connect() used to close the
1856 socket. However, verify_get_ident() also closes the socket later, and in
1857 between Exim writes to the log, which may get opened at this point. When
1858 the socket was closed in ip_connect(), the log could get the same file
1859 descriptor number as the socket. This naturally causes chaos. The fix is
1860 not to close the socket in ip_connect(); the socket should be closed by
1861 the function that creates it. There was only one place in the code where
1862 this was missing, in the iplookup router, which I don't think anybody now
1863 uses, but I've fixed it anyway.
1865 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1866 well as to direct DNS lookups. Otherwise the handling of names in host
1867 lists is inconsistent and therefore confusing.
1873 PH/01 Two changes to the default runtime configuration:
1875 (1) Move the checks for relay_from_hosts and authenticated clients from
1876 after to before the (commented out) DNS black list checks.
1878 (2) Add control=submission to the relay_from_hosts and authenticated
1879 clients checks, on the grounds that messages accepted by these
1880 statements are most likely to be submissions.
1882 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1884 (1) Generate an error if the third argument for the ${prvs expansion is
1887 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1890 (3) Reset the variables that are obtained from the first argument of
1891 ${prvscheck and used in the second argument before leaving the code,
1892 because their memory is reclaimed, so using them afterwards may do
1895 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1896 one (it's much easier than Tom thought :-).
1898 (5) Because of (4), we can now allow for the use of $prvscheck_result
1899 inside the third argument.
1901 PH/03 For some reason, the default setting of PATH when running a command from
1902 a pipe transport was just "/usr/bin". I have changed it to
1905 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1906 anything to be listed in the output from -bV.
1908 PH/05 When a filter generated an autoreply, the entire To: header line was
1909 quoted in the delivery log line, like this:
1911 => >A.N.Other <ano@some.domain> <original@ddress> ...
1913 This has been changed so that it extracts the operative address. There
1914 may be more than one such address. If so, they are comma-separated, like
1917 => >ano@some.domain,ona@other.domain <original@ddress> ...
1919 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1920 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1921 not being looked up in the rDNS to get a host name, Exim was showing the
1922 IP address twice in Received: lines, even though the IP addresses were
1923 identical. For example:
1925 Received: from [1.2.3.4] (helo=[1.2.3.4])
1927 However, if the real host name was known, it was omitting the HELO data
1928 if it matched the actual IP address. This has been tidied up so that it
1929 doesn't show the same IP address twice.
1931 PH/07 When both +timestamp and +memory debugging was on, the value given by
1932 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1933 called by the debug printing, thereby overwriting the timestamp buffer.
1934 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1936 PH/08 When the original message was included in an autoreply transport, it
1937 always said "this is a copy of the message, including all the headers",
1938 even if body_only or headers_only was set. It now gives an appropriate
1941 PH/09 Applied a patch from the Sieve maintainer which:
1943 o fixes some comments
1944 o adds the (disabled) notify extension core
1945 o adds some debug output for the result of if/elsif tests
1946 o points to the current vacation draft in the documentation
1947 and documents the missing references header update
1951 o fixes a bug in processing the envelope test (when testing
1952 multiple envelope elements, the last element determinted the
1955 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1956 Electronic Mail") by including:
1958 Auto-submitted: auto-generated
1960 in the messages that it generates (bounce messages and others, such as
1961 warnings). In the case of bounce messages for non-SMTP mesages, there was
1962 also a typo: it was using "Auto_submitted" (underscore instead of
1963 hyphen). Since every message generated by Exim is necessarily in response
1964 to another message, thes have all been changed to:
1966 Auto-Submitted: auto-replied
1968 in accordance with these statements in the RFC:
1970 The auto-replied keyword:
1972 - SHOULD be used on messages sent in direct response to another
1973 message by an automatic process,
1975 - MUST NOT be used on manually-generated messages,
1977 - MAY be used on Delivery Status Notifications (DSNs) and Message
1978 Disposition Notifications (MDNs),
1980 - MUST NOT be used on messages generated by automatic or periodic
1981 processes, except for messages which are automatic responses to
1984 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1985 to the default Received: header definition.
1987 PH/12 Added log selector acl_warn_skipped (default on).
1989 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1990 variables because (a) they are in the wrong storage pool and (b) even if
1991 they were copied, it wouldn't work properly because of the caching.
1993 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1994 checking when decoding. Apparently there are clients that generate
1995 overlong encoded strings. Why am I not surprised?
1997 PH/15 If the first argument of "${if match_address" was not empty, but did not
1998 contain an "@" character, Exim crashed. Now it writes a panic log message
1999 and treats the condition as false.
2001 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2003 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2004 extension "envelope-auth". The code is finished and in agreement with
2005 other implementations, but there is no documentation so far and in fact,
2006 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2007 not changing the active code.
2009 Print executed "if" and "elsif" statements when debugging is used. This
2010 helps a great deal to understand what a filter does.
2012 Document more things not specified clearly in RFC3028. I had all this
2013 sorted out, when out of a sudden new issues came to my mind. Oops."
2015 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2018 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2019 canonical form (as documented). However, after a host name lookup from
2020 the IP address, check_host() was doing a simple string comparison with
2021 addresses acquired from the DNS when checking that the found name did
2022 have the original IP as one of its addresses. Since any found IPv6
2023 addresses are likely to be in abbreviated form, the comparison could
2024 fail. Luckily, there already exists a function for doing the comparison
2025 by converting both addresses to binary, so now that is used instead of
2026 the text comparison.
2028 PH/20 There was another similar case to PH/19, when a complete host name was
2029 given in a host list; looking up its IP address could give an abbreviated
2030 form, whereas the current host's name might or might not be abbreviated.
2031 The same fix has been applied.
2037 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2038 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2041 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2042 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2044 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2046 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2047 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2048 Also, for "Auto-Submitted", treat anything other than "no" as
2049 non-personal, in accordance with RFC 3834. (Previously it treated
2050 anything starting "auto-" as non-personal.)
2052 TF/01 The control=submission/name=... option had a problem with syntax
2053 errors if the name included a slash character. The /name= option
2054 now slurps the rest of the string, so it can include any characters
2055 but it must come last in the list of options (after /sender_retain
2058 PH/05 Some modifications to the interface to the fake nameserver for the new
2066 TK/01 Added the "success_on_redirect" address verification option. See
2067 NewStuff for rationale and an example.
2069 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2071 PH/02 Patch to exigrep to allow it to work on syslog lines.
2073 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2074 fread() to skip over the body file's header line, because in Cygwin the
2075 header line is locked and is inaccessible.
2077 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2078 co-exist for some time) to make it clear that it is the Exim ID that is
2079 referenced, not the Message-ID: header line.
2081 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2082 string_format() function, because snprintf() does not exist on all
2085 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2086 ${stat: expansion item.
2088 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2089 protocol synchronization error", to keep the pedants happy.
2091 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2092 well as for IRIX systems, when gcc is being used. See the host.c source
2095 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2097 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2100 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2101 transport and to the smtp transport in LMTP mode.
2103 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2105 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2106 run a filter in a subprocess. This could lead to confusion in subsequent
2107 lookups in the parent process. There should also be a search_tidyup() at
2108 the end of the subprocess.
2110 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2111 only if the host matched helo_try_verify_hosts, which caused the
2112 verification to occur when the EHLO/HELO command was issued. The ACL just
2113 tested the remembered result. Now, if a previous verification attempt has
2114 not happened, "verify = helo" does it there and then.
2116 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2118 TK/03 Fix log output including CR from clamd.
2120 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2121 exist provoked a memory error which could cause a segfault.
2123 PH/15 Installed PCRE 6.2
2125 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2127 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2128 of the problem. Specifically, suggested +O2 rather than +O1 for the
2131 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2133 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2134 record, the port was not correctly logged when the outgoing_port log
2135 selector was set (it logged the transort's default port).
2137 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2138 fallback_hosts, and "hosts" in the smtp transport.
2140 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2141 host errors such as "Connection refused".
2143 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2144 authentication with radiusclient 0.4.9:
2146 - Error returned from rc_read_config was caught wrongly
2147 - Username/password not passed on to radius server due to wrong length.
2149 The presumption is that some radiusclient API changes for 4.51/PH/17
2150 were not taken care of correctly. The code is still untested by me (my
2151 Linux distribution still has 0.3.2 of radiusclient), but it was
2152 contributed by a Radius user.
2154 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2155 expanding the "port" option of the smtp transport.
2157 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2158 while reading a MIME header. Thanks to Tom Hughes for a patch.
2160 PH/24 Include config.h inside local_scan.h so that configuration settings are
2163 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2164 that in an ACL for RCPT (for example), you can examine exactly what was
2167 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2168 commands, but it was not correctly comparing the address with the actual
2169 client host address. Thus, it would show the EHLO address in Received:
2170 header lines when this was not necessary.
2172 PH/27 Added the % operator to ${eval:}.
2174 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2175 it should be ignoring failures (because with -C, for example, it has lost
2176 privilege). It wasn't ignoring creation failures other than "already
2179 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2182 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2183 because an input line was too long, either on its own, or by virtue of
2184 too many continuations, the temporary file was not being removed, and the
2185 return code was incorrect.
2187 PH/31 Missing "BOOL" in function definition in filtertest.c.
2189 PH/32 Applied Sieve patches from the maintainer.
2191 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2193 PH/33 Added "verify = not_blind".
2195 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2196 Local/Makefile (with some defaults set). These are used in built scripts
2197 such as exicyclog, but they have never been used in the exim_install
2198 script (though there are many overriding facilities there). I have
2199 arranged that the exim_install script now takes note of these two
2202 PH/35 Installed configuration files for Dragonfly.
2204 PH/36 When a locally submitted message by a trusted user did not contain a
2205 From: header, and the sender address was obtained from -f or from an SMTP
2206 MAIL command, and the trusted user did not use -F to supply a sender
2207 name, $originator_name was incorrectly used when constructing a From:
2208 header. Furthermore, $originator_name was used for submission mode
2209 messages from external hosts without From: headers in a similar way,
2210 which is clearly wrong.
2212 PH/37 Added control=suppress_local_fixups.
2214 PH/38 When log_selector = +received_sender was set, and the addition of the
2215 sender made the log line's construction buffer exactly full, or one byte
2216 less than full, an overflow happened when the terminating "\n" was
2219 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2220 when the result of a list match is failure because a DNS lookup failed.
2222 PH/40 RM_COMMAND is now used in the building process.
2224 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2225 the "build-* directories that it finds.
2227 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2228 address in a domain literal was a prefix of an interface address.
2230 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2231 when verifying a sender address, unless rewrite_headers is false.
2233 PH/44 Wrote a long comment about why errors_to addresses are verified as
2234 recipients, not senders.
2236 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2237 the ratelimit ACL was added.
2239 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2241 PH/46 Added extra information about PostgreSQL errors to the error string.
2243 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2244 avoiding the need to install special zones in a real server. This is
2245 backwards compatible; if it can't find the fake resolver, it drops back.
2246 Thus, both old and new test suites can be run.
2248 TF/02 Added util/ratelimit.pl
2250 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2251 clock is set back in time.
2253 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2254 Candler <B.Candler@pobox.com>.
2256 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2257 OK for addresses that are the result of redirections.
2259 PH/48 A number of further additions for the benefit of the new test suite,
2260 including a fake gethostbyname() that interfaces to the fake DNS resolver
2263 TF/06 The fix for widen_domains has also been applied to qualify_single and
2264 search_parents which are the other dnslookup options that can cause
2267 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2270 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2272 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2273 service" if it encountered an MX record with an empty target hostname.
2274 The message is now "an MX or SRV record indicated no SMTP service".
2276 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2277 if the DNS of the sending site is misconfigured. This is quite a
2278 common situation. This change restores the behaviour of treating a
2279 helo verification defer as a failure.
2281 PH/51 If self=fail was set on a router, the bounce message did not include the
2282 actual error message.
2288 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2290 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2291 command itself ended in error, the underlying message about the transport
2292 filter timeout was being overwritten with the pipe command error. Now the
2293 underlying error message should be appended to the second error message.
2295 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2297 PH/02 Reduce the amount of output that "make" produces by default. Full output
2298 can still be requested.
2300 PH/03 The warning log line about a condition test deferring for a "warn" verb
2301 was being output only once per connection, rather than after each
2302 occurrence (because it was using the same function as for successful
2303 "warn" verbs). This seems wrong, so I have changed it.
2305 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2306 it should not have, which might have caused a crash in the right
2307 circumstances, but probably never did.
2309 PH/04 Installed a modified version of Tony Finch's patch to make submission
2310 mode fix the return path as well as the Sender: header line, and to
2311 add a /name= option so that you can make the user's friendly name appear
2314 TF/03 Added the control = fakedefer ACL modifier.
2316 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2317 Mark Lowes for thorough testing.
2319 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2321 TK/03 Merged latest SRS patch from Miles Wilton.
2323 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2324 with the definition in sysexits.h (which is #included earlier).
2325 Fortunately, Exim does not actually use EX_OK. The code used to try to
2326 preserve the sysexits.h value, by assumimg that macro definitions were
2327 scanned for macro replacements. I have been disabused of this notion,
2328 so now the code just undefines EX_OK before #including unistd.h.
2330 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2331 in the smtp transport. When a block could not be written in a single
2332 write() function, the timeout was being re-applied to each part-write.
2333 This seems wrong - if the receiver was accepting one byte at a time it
2334 would take for ever. The timeout is now adjusted when this happens. It
2335 doesn't have to be particularly precise.
2337 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2338 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2340 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2341 without a domain if the check to <postmaster@domain> fails.
2343 SC/01 Eximstats: added -xls and the ability to specify output files
2344 (patch written by Frank Heydlauf).
2346 SC/02 Eximstats: use FileHandles for outputing results.
2348 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2350 SC/04 Eximstats: fixed display of large numbers with -nvr option
2352 SC/05 Eximstats: fixed merging of reports with empty tables.
2354 SC/06 Eximstats: added the -include_original_destination flag
2356 SC/07 Eximstats: removed tabs and trailing whitespace.
2358 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2360 TK/06 MBOX spool code: Add real "From " MBOX separator line
2361 so the .eml file is really in mbox format (even though
2362 most programs do not really care). Patch from Alex Miller.
2364 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2365 The latter is generated from $received_to and is only set if the
2366 message has one envelope recipient. SA can use these headers,
2367 obviously out-of-the-box. Patch from Alex Miller.
2369 PH/08 The ${def test on a variable was returning false if the variable's
2370 value was "0", contrary to what the specification has always said!
2371 The result should be true unless the variable is empty.
2373 PH/09 The syntax error of a character other than { following "${if
2374 def:variable_name" (after optional whitespace) was not being diagnosed.
2375 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2376 accidental colon was present, for example, could give incorrect results.
2378 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2379 result is used (not including appendfile, where other changes are about
2382 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2383 This involved changing a lot of size variables from int to off_t. It
2384 should work with maildirs and everything.
2386 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2387 spamd dying while we are connected to it.
2389 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2392 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2393 function for BDB 4.3.
2395 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2397 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2398 the sources for PCRE have been re-arranged and more files are now
2401 PH/15 The code I had for printing potentially long long variables in PH/11
2402 above was not the best (it lost precision). The length of off_t variables
2403 is now inspected at build time, and an appropriate printing format (%ld
2404 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2405 to be "long long int" or "long int". This is needed for the internal
2406 formatting function string_vformat().
2408 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2409 the configuration file to be ":syslog", then the script "guesses" where
2410 the logs files are, rather than using the compiled in default. In our
2411 case the guess is not the same as the compiled default, so the script
2412 suddenly stopped working when I started to use syslog. The patch checks
2413 to see if log_file_path is "". If so, it attempts to read it from exim
2414 with no configuration file to get the compiled in version, before it
2415 falls back to the previous guessing code."
2417 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2418 implementing BATV in an Exim configuration. See NewStuff for the gory
2421 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2422 Makefile that are specific to HP-UX.
2424 PH/18 If the "use_postmaster" option was set for a recipient callout together
2425 with the "random" option, the postmaster address was used as the MAIL
2426 FROM address for the random test, but not for the subsequent recipient
2427 test. It is now used for both.
2429 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2430 patch removes a few documentation additions to RFC 3028, because the
2431 latest draft now contains them. It adds the new en;ascii-case comparator
2432 and a new error check for 8bit text in MIME parts. Comparator and
2433 require names are now matched exactly. I enabled the subaddress
2434 extension, but it is not well tested yet (read: it works for me)."
2436 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2437 rework some of the code of TK/09 above to avoid the hardwired use of
2438 "%lld" and "long long". Replaced the call to snprintf() with a call to
2441 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2442 records point to non-existent hosts", "retry timeout exceeded", and
2443 "retry time not reached for any host after a long failure period".
2445 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2446 experimental DomainKeys support:
2448 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2449 (2) On an error such as an illegally used "control", the wrong name for
2450 the control was given.
2452 These problems did NOT occur unless DomainKeys support was compiled.
2454 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2456 PH/24 Added ${if match_ip condition.
2458 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2459 databases so that it will be absolutely obvious if a crash occurs in the
2460 DB library. This is a regular occurrence (often caused by mis-matched
2463 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2464 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2465 picked up on a user's system that detects such things. There doesn't seem
2466 to be a gcc warning option for this - only an attribute that has to be
2467 put on the function's prototype. It seems that in Fedora Core 4 they have
2468 set this on a number of new functions. No doubt there will be more in due
2471 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2472 specify a transport. However, if an address that was verified by such a
2473 router was the subject of a callout, Exim crashed because it tried to
2474 read the rcpt_include_affixes from the non-existent transport. Now it
2475 just assumes that the setting of that option is false. This bug was
2476 introduced by 4.51/PH/31.
2478 PH/28 Changed -d+all to exclude +memory, because that information is very
2479 rarely of interest, but it makes the output a lot bigger. People tend to
2480 do -d+all out of habit.
2482 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2483 code in os-type was giving problems when libc.so lives in lib64, like on
2486 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2487 aren't the modern standard, and it seems that some systems' include files
2488 don't always have them. Exim was already checking for some of the newer
2489 ones like T_AAAA, and defining it itself. I've added checks for all the
2490 record types that Exim uses.
2492 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2493 not automatically generating a new one, as it is supposed to. This
2494 prevented TLS from working. If the file did exist, but contained invalid
2495 data, a new version was generated, as expected. It was only the case of a
2496 non-existent file that was broken.
2498 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2499 with a change in libdomainkeys > 0.64.
2501 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2502 from DNS. If the selector record carries the flag, it now has
2503 precedence over the domain-wide flag.
2505 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2507 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2508 the use of a port name that isn't defined in /etc/services) occurred, the
2509 message was deferred as in a normal delivery, and thus remained on the
2510 spool, instead of being failed because of the mua_wrapper setting. This
2511 is now fixed, and I tidied up some of the mua_wrapper messages at the
2514 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2515 the messages in a hash of arrays rather than using individual hashes.
2516 This is a bit cleaner and results in dramatic memory savings, albeit
2517 at a slight CPU cost.
2519 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2520 as requested by Marc Sherman.
2522 SC/10 Eximstats: added histograms for user specified patterns as requested
2525 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2527 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2528 fopen() in the content-scanning modules that did not already have it.
2534 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2535 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2537 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2539 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2541 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2542 to test Sieve filters that use "vacation".
2544 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2545 that changes the way the GnuTLS parameters are stored in the cache file.
2546 The new format can be generated externally. For backward compatibility,
2547 if the data in the cache doesn't make sense, Exim assumes it has read an
2548 old-format file, and it generates new data and writes a new file. This
2549 means that you can't go back to an older release without removing the
2552 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2553 work if there are any delivery delays because "one_time" forces the
2554 parent to be marked "delivered", so its unseen clone is never tried
2555 again. For this reason, Exim now forbids the simultaneous setting of
2558 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2559 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2560 entry if you want to know the details. The fix, however, neglected to
2561 consider the case when local delivery batching is involved. The test for
2562 "previously delivered" was not happening when checking to see if an
2563 address could be batched with a previous (undelivered) one; under
2564 certain circumstances this could lead to multiple deliveries to the same
2567 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2568 in its include files, and this causes problems building Exim.
2570 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2571 header_syntax) but Exim was just ignoring anything given after a slash.
2572 In particular, this caused confusion with an attempt to use "verify =
2573 reverse_host_lookup/defer_ok". An error is now given when options are
2574 supplied for verify items that do not have them. (Maybe reverse_host_
2575 lookup should have a defer_ok option, but that's a different point.)
2577 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2578 defined by RFC 821) to 2048, because there were problems with some AUTH
2579 commands, and RFC 1869 says the size should be increased for extended
2580 SMTP commands that take arguments.
2582 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2585 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2586 "unknown" error; now it says that the functionality isn't in the binary.
2588 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2589 an address' error message when a string expansion fails (syntax or
2590 whatever). Otherwise the password may appear in the log. Following change
2591 PH/42 below, there is no longer a chance of it appearing in a bounce
2594 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2596 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2597 of its addresses was ever tried. (Bugzilla bug #2.)
2599 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2600 the result incorrectly in the debug output. (It correctly added a newline
2601 to what was transported.)
2603 TF/01 Added $received_time.
2605 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2606 commented out examples of how to interface to a virus scanner and to
2607 SpamAssassin. Also added commented examples of av_scanner and
2608 spamd_address settings.
2610 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2611 and controls are allowed in which ACLs. There were a couple of minor
2612 errors. Some of the entries in the conditions table (which is a table of
2613 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2614 negation of where the condition IS allowed.
2616 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2618 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2619 header file does not have a version number, so I've had to invent a new
2620 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2621 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2622 radiusclient), but it was contributed by a Radius user.
2624 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2625 files or directories, for OpenSSL.
2627 PH/19 When an Exim process that is running as root has to create an Exim log
2628 file, it does so in a subprocess that runs as exim:exim so as to get the
2629 ownership right at creation (otherwise, other Exim processes might see
2630 the file with the wrong ownership). There was no test for failure of this
2631 fork() call, which would lead to the process getting stuck as it waited
2632 for a non-existent subprocess. Forks do occasionally fail when resources
2633 run out. I reviewed all the other calls to fork(); they all seem to check
2636 PH/20 When checking for unexpected SMTP input at connect time (before writing
2637 the banner), Exim was not dealing correctly with a non-positive return
2638 from the read() function. If the client had disconnected by this time,
2639 the result was a log entry for a synchronization error with an empty
2640 string after "input=" when read() returned zero. If read() returned -1
2641 (an event I could not check), uninitialized data bytes were printed.
2642 There were reports of junk text (parts of files, etc) appearing after
2645 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2647 PH/22 Added support for macro redefinition, and (re)definition in between
2648 driver and ACL definitions.
2650 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2651 forgetting to use the resulting value; it was using the unexpanded value.
2653 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2654 hadn't been configured. The fix is from Juergen Kreileder, who
2655 understands it better than I do:
2657 "Here's what I see happening with three configured cyrus_sasl
2658 authenticators configured (plain, login, cram-md5):
2660 On startup auth_cyrus_sasl_init() gets called for each of these.
2661 This means three calls to sasl_listmech() without a specified mech_list.
2662 => SASL tests which mechs of all available mechs actually work
2663 => three warnings about OTP not working
2664 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2666 With the patch, sasl_listmech() also gets called three times. But now
2667 SASL's mech_list option is set to the server_mech specified in the the
2668 authenticator. Or in other words, the answer from sasl_listmech()
2669 gets limited to just the mech you're testing for (which is different
2671 => the return list contains just 'plain' or 'login', 'cram-md5' or
2672 nothing depending on the value of ob->server_mech.
2674 I've just tested the patch: Authentication still works fine,
2675 unavailable mechs specified in the exim configuration are still
2676 caught, and the auth.log warnings about OTP are gone."
2678 PH/25 When debugging is enabled, the contents of the command line are added
2679 to the debugging output, even when log_selector=+arguments is not
2682 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2683 answer is "GNU", and only if the return is "GNU/something" is the answer
2686 PH/27 $acl_verify_message is now set immediately after the failure of a
2687 verification in an ACL, and so is available in subsequent modifiers. In
2688 particular, the message can be preserved by coding like this:
2690 warn !verify = sender
2691 set acl_m0 = $acl_verify_message
2693 Previously, $acl_verify_message was set only while expanding "message"
2694 and "log_message" when a very denied access.
2696 PH/28 Modified OS/os.c-Linux with
2698 -#ifndef OS_LOAD_AVERAGE
2699 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2701 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2702 nomenclature these days.)
2704 PH/29 Installed patch from the Sieve maintainer that adds the options
2705 sieve_useraddress and sieve_subaddress to the redirect router.
2707 PH/30 In these circumstances:
2708 . Two addresses routed to the same list of hosts;
2709 . First host does not offer TLS;
2710 . First host accepts first address;
2711 . First host gives temporary error to second address;
2712 . Second host offers TLS and a TLS session is established;
2713 . Second host accepts second address.
2714 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2715 and peerdn, if requested) that were in fact used only for the second
2718 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2719 attention to any local part prefix or suffix that was matched by the
2720 router that accepted the address. It now behaves in the same way as it
2721 does for delivery: the affixes are removed from the local part unless
2722 rcpt_include_affixes is set on the transport.
2724 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2725 timeout during the DATA phase of an incoming message.
2727 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2728 applied a patch sanctioned by the Sieve maintainer.
2730 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2731 the uid or gid is negative. A case of a negative gid caused this to be
2732 noticed. The fix allows for either to be negative.
2734 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2735 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2738 PH/36 The change PH/12 above was broken. Fixed it.
2740 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2741 the grounds that routing the same address twice would always produce the
2742 same answer. This might have been true once, but it is certainly no
2743 longer true now. Routing a child address may depend on the previous
2744 routing that produced that child. Some complicated redirection strategies
2745 went wrong when messages had multiple recipients, and made Exim's
2746 behaviour dependent on the order in which the addresses were given.
2748 I have moved the duplicate checking until after the routing is complete.
2749 Exim scans the addresses that are assigned to local and remote
2750 transports, and removes any duplicates. This means that more work will be
2751 done, as duplicates will always all be routed, but duplicates are
2752 presumably rare, so I don't expect this is of any significance.
2754 For deliveries to pipes, files, and autoreplies, the duplicate checking
2755 still happens during the routing process, since they are not going to be
2758 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2759 It corrects a timeout issue with spamd. This is Ian's comment: "The
2760 background is that sometimes spamd either never reads data from a
2761 connection it has accepted, or it never writes response data. The exiscan
2762 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2763 blindly assumes that writes won't block so it may never time out."
2765 PH/39 Allow G after quota size as well as K and M.
2767 PH/40 The value set for $authenticated_id in an authenticator may not contain
2768 binary zeroes or newlines because the value is written to log lines and
2769 to spool files. There was no check on this. Now the value is run through
2770 the string_printing() function so that such characters are converted to
2771 printable escape sequences.
2773 PH/41 $message_linecount is a new variable that contains the total number of
2774 lines in the message. Compare $body_linecount, which is the count for the
2777 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2778 bounce and delay warning messages, except in certain special cases, which
2781 (a) An SMTP error message from a remote host;
2782 (b) A message specified in a :fail: redirection;
2783 (c) A message specified in a "fail" command in a system filter;
2784 (d) A message specified in a FAIL return from the queryprogram router;
2785 (e) A message specified by the cannot_route_message router option.
2787 In these cases only, Exim does include the error details in bounce and
2788 warning messages. There are also a few cases where bland messages such
2789 as "unrouteable address" or "local delivery error" are given.
2791 PH/43 $value is now also set for the "else" part of a ${run expansion.
2793 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2794 being worked on, but at least Exim now implements the latest version to
2797 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2798 process to complete was treated as a delivery failure, a timeout while
2799 writing the message to the pipe was logged, but erroneously treated as a
2800 successful delivery. Such timeouts include transport filter timeouts. For
2801 consistency with the overall process timeout, these timeouts are now
2802 treated as errors, giving rise to delivery failures by default. However,
2803 there is now a new Boolean option for the pipe transport called
2804 timeout_defer, which, if set TRUE, converts the failures into defers for
2805 both kinds of timeout. A transport filter timeout is now identified in
2808 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2809 systems where "make" and "gmake" are different, calling "gmake" at top
2810 level broke things. I've arranged for the value of $(MAKE) to be passed
2811 from the Makefile to this script so that it can call the same version of
2815 A note about Exim versions 4.44 and 4.50
2816 ----------------------------------------
2818 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2819 changes of various kinds. As a consequence, a big documentation update was
2820 needed. This delayed the release for rather longer than seemed good, especially
2821 in the light of a couple of (minor) security issues. Therefore, the changes
2822 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2823 release. So 4.44 and 4.50 are in effect two different branches that both start
2826 I have left the 4.50 change log unchanged; it contains all the changes since
2827 4.43. The change log for 4.44 is below; many of its items are identical to
2828 those for 4.50. This seems to be the most sensible way to preserve the
2829 historical information.
2835 1. Minor wording change to the doc/README.SIEVE file.
2837 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2838 computation of the current number of files was incorrect.
2840 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2841 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2844 4. Give more explanation in the error message when the command for a transport
2845 filter fails to execute.
2847 5. There are several places where Exim runs a non-Exim command in a
2848 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2849 was being done only for the command run by the queryprogram router. It is
2850 now done for all such subprocesses. The other cases are: ${run, transport
2851 filters, and the commands run by the lmtp and pipe transports.
2853 6. Added CONFIGURE_GROUP build-time option.
2855 7. Some older OS have a limit of 256 on the maximum number of file
2856 descriptors. Exim was using setrlimit() to set 1000 as a large value
2857 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2858 systems. I've change it so that if it can't get 1000, it tries for 256.
2860 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2861 was an oversight, and furthermore, ever since the addition of extra
2862 controls (e.g. 4.43/32), the checks on when to allow different forms of
2863 "control" were broken. There should now be diagnostics for all cases when a
2864 control that does not make sense is encountered.
2866 9. Added the /retain_sender option to "control=submission".
2868 10. $recipients is now available in the predata ACL (oversight).
2870 11. Tidy the search cache before the fork to do a delivery from a message
2871 received from the command line. Otherwise the child will trigger a lookup
2872 failure and thereby defer the delivery if it tries to use (for example) a
2873 cached ldap connection that the parent has called unbind on.
2875 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2876 of $address_data from the recipient verification was clobbered by the
2877 sender verification.
2879 13. The value of address_data from a sender verification is now available in
2880 $sender_address_data in subsequent conditions in the ACL statement.
2882 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2884 15. Added a new option "connect=<time>" to callout options, to set a different
2887 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2888 was its contents. (It was OK if the option was not defined at all.)
2890 17. A "Completed" log line is now written for messages that are removed from
2891 the spool by the -Mrm option.
2893 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2894 information about exactly what failed.
2896 19. Added -dd to debug only the daemon process.
2898 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2899 handles timeouts, both on the server side and network timeouts. Renamed the
2900 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2902 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2903 It is now set to "smtps".
2905 22. $host_address is now set to the target address during the checking of
2906 ignore_target_hosts.
2908 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2909 being passed; this would have caused $sender_host_name to have been used if
2910 matching the list had actually called for a host name (not very likely,
2911 since this list is usually IP addresses). A host name is now passed as
2914 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2915 code that specifies a non-restarting handler (typically sigaction() in
2916 modern systems) in an attempt to fix a rare and obscure crash bug.
2918 25. Narrowed the window for a race in the daemon that could cause it to ignore
2919 SIGCHLD signals. This is not a major problem, because they are used only to
2920 wake it up if nothing else does.
2922 26. A malformed maildirsize file could cause Exim to calculate negative values
2923 for the mailbox size or file count. Odd effects could occur as a result.
2924 The maildirsize information is now recalculated if the size or filecount
2927 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2928 support for a long time. Removed HAVE_SYS_VFS_H.
2930 28. Installed the latest version of exipick from John Jetmore.
2932 29. In an address list, if the pattern was not a regular expression, an empty
2933 subject address (from a bounce message) matched only if the pattern was an
2934 empty string. Non-empty patterns were not even tested. This was the wrong
2935 because it is perfectly reasonable to use an empty address as part of a
2936 database query. An empty address is now tested by patterns that are
2937 lookups. However, all the other forms of pattern expect the subject to
2938 contain a local part and a domain, and therefore, for them, an empty
2939 address still always fails if the pattern is not itself empty.
2941 30. Exim went into a mad DNS loop when attempting to do a callout where the
2942 host was specified on an smtp transport, and looking it up yielded more
2943 than one IP address.
2945 31. Re-factored the code for checking spool and log partition space into a
2946 function that finds that data and another that does the check. The former
2947 is then used to implement four new variables: $spool_space, $log_space,
2948 $spool_inodes, and $log_inodes.
2950 32. The RFC2047 encoding function was originally intended for short strings
2951 such as real names; it was not keeping to the 75-character limit for
2952 encoded words that the RFC imposes. It now respects the limit, and
2953 generates multiple encoded words if necessary. To be on the safe side, I
2954 have increased the buffer size for the ${rfc2047: expansion operator from
2957 33. It is now permitted to omit both strings after an "if" condition; if the
2958 condition is true, the result is "true". As before, when the second string
2959 is omitted, a false condition yields an empty string. This makes it less
2960 cumbersome to write custom ACL and router conditions.
2962 34. Failure to deliver a bounce message always caused it to be frozen, even if
2963 there was an errors_to setting on the router. The errors_to setting is now
2966 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2967 canonical form (fully expanded) before being placed in
2968 $sender_host_address.
2970 36. The table in the code that translates DNS record types into text (T_A to
2971 "A" for instance) was missing entries for NS and CNAME. It is just possible
2972 that this could have caused confusion if both these types were looked up
2973 for the same domain, because the text type is used as part of Exim's
2974 per-process caching. But the chance of anyone hitting this buglet seems
2977 37. The dnsdb lookup has been extended in a number of ways.
2979 (1) There is a new type, "zns", which walks up the domain tree until it
2980 finds some nameserver records. It should be used with care.
2982 (2) There is a new type, "mxh", which is like "mx" except that it returns
2983 just the host names, not the priorities.
2985 (3) It is now possible to give a list of domains (or IP addresses) to be
2986 looked up. The behaviour when one of the lookups defers can be
2987 controlled by a keyword.
2989 (4) It is now possible to specify the separator character for use when
2990 multiple records are returned.
2992 38. The dnslists ACL condition has been extended: it is now possible to supply
2993 a list of IP addresses and/or domains to be looked up in a particular DNS
2996 39. Added log_selector=+queue_time_overall.
2998 40. When running the queue in the test harness, wait just a tad after forking a
2999 delivery process, to get repeatability of debugging output.
3001 41. Include certificate and key file names in error message when GnuTLS fails
3002 to set them up, because the GnuTLS error message doesn't include the name
3003 of the failing file when there is a problem reading it.
3005 42. Allow both -bf and -bF in the same test run.
3007 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3009 44. The "Exiscan patch" is now merged into the mainline Exim source.
3011 45. Sometimes the final signoff response after QUIT could fail to get
3012 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3013 < 0 before doing a fflush(). This bug looks as though it goes back to the
3014 introduction of TLS in release 3.20, but "sometimes" must have been rare
3015 because the tests only now provoked it.
3017 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3018 (this can affect the format of dates).
3020 47. exim_tidydb, when checking for the continued existence of a message for
3021 which it has found a message-specific retry record, was not finding
3022 messages that were in split spool directories. Consequently, it was
3023 deleting retry records that should have stayed in existence.
3025 48. Steve fixed some bugs in eximstats.
3027 49. The SPA authentication driver was not abandoning authentication and moving
3028 on to the next authenticator when an expansion was forced to fail,
3029 contradicting the general specification for all authenticators. Instead it
3030 was generating a temporary error. It now behaves as specified.
3032 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3033 (the order specifies the preference for clients). The order is now AES256,
3034 AES128, 3DES, ARCFOUR128.
3036 51. Small patch to Sieve code - explicitly set From: when generating an
3039 52. Exim crashed if a remote delivery caused a very long error message to be
3040 recorded - for instance if somebody sent an entire SpamAssassin report back
3041 as a large number of 550 error lines. This bug was coincidentally fixed by
3042 increasing the size of one of Exim's internal buffers (big_buffer) that
3043 happened as part of the Exiscan merge. However, to be on the safe side, I
3044 have made the code more robust (and fixed the comments that describe what
3047 53. Now that there can be additional text after "Completed" in log lines (if
3048 the queue_time_overall log selector is set), a one-byte patch to exigrep
3049 was needed to allow it to recognize "Completed" as not the last thing in
3052 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3053 patch that reportedly fixes this has been added. I am not expert enough to
3054 create a test for it. This is what the patch creator wrote:
3056 "I found a little strange behaviour of ldap code when working with
3057 Windows 2003 AD Domain, where users was placed in more than one
3058 Organization Units. When I tried to give exim partial DN, the exit code
3059 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3060 But simultaneously result of request was absolutely normal ldap result,
3061 so I produce this patch..."
3063 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3064 REFERENCE, so I have modified the code to exclude the patch when that macro
3067 55. Some experimental protocols are using DNS PTR records for new purposes. The
3068 keys for these records are domain names, not reversed IP addresses. The
3069 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3070 leaves it alone. Component reversal etc. now happens only for IP addresses.
3073 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3075 57. Double the size of the debug message buffer (to 2048) so that more of very
3076 long debug lines gets shown.
3078 58. The exicyclog utility now does better if the number of log files to keep
3079 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3081 59. Two changes related to the smtp_active_hostname option:
3083 (1) $smtp_active_hostname is now available as a variable.
3084 (2) The default for smtp_banner uses $smtp_active_hostname instead
3085 of $primary_hostname.
3087 60. The host_aton() function is supposed to be passed a string that is known
3088 to be a valid IP address. However, in the case of IPv6 addresses, it was
3089 not checking this. This is a hostage to fortune. Exim now panics and dies
3090 if the condition is not met. A case was found where this could be provoked
3091 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3092 components; fortuitously, this particular loophole had already been fixed
3093 by change 4.50/55 above.
3095 If there are any other similar loopholes, the new check in host_aton()
3096 itself should stop them being exploited. The report I received stated that
3097 data on the command line could provoke the exploit when Exim was running as
3098 exim, but did not say which command line option was involved. All I could
3099 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3100 running as the user.
3103 61. There was a buffer overflow vulnerability in the SPA authentication code
3104 (which came originally from the Samba project). I have added a test to the
3105 spa_base64_to_bits() function which I hope fixes it.
3108 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3109 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3111 63. The daemon start-up calls getloadavg() while still root for those OS that
3112 need the first call to be done as root, but it missed one case: when
3113 deliver_queue_load_max is set with deliver_drop_privilege. This is
3114 necessary for the benefit of the queue runner, because there is no re-exec
3115 when deliver_drop_privilege is set.
3117 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3118 This has been fixed.
3120 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3121 was in use, was not putting the data itself into the right store pool;
3122 consequently, it could be overwritten for a subsequent message in the same
3123 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3126 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3128 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3129 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3130 the function were treating the return as a boolean value, which happened to
3131 work because 0=false and not-0=true, but is not correct code.
3133 68. The host_aton() function was not handling scoped IPv6 addresses (those
3134 with, for example, "%eth0" on the end) correctly.
3136 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3137 negated items (that is, ~something) in unsigned ints. Some compilers
3138 apparently mutter when there is no cast.
3140 70. If an address verification called from an ACL failed, and did not produce a
3141 user-specific message (i.e. there was only a "system" message), nothing was
3142 put in $acl_verify_message. In this situation, it now puts the system
3145 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3146 session; change 4.31/43 added the unwanted input to the log line - except
3147 that it did not do this in the start of session case. It now does.
3149 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3150 This is wrong and can cause the other end to generate a synchronization
3151 error if it is another Exim or anything else that does the synchronization
3152 check. A QUIT command is no longer sent after a timeout.
3154 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3155 during host lookups.
3157 74. The defer_ok option of callout verification was not working if it was used
3158 when verifying addresses in header lines, that is, for this case:
3160 verify = header_sender/callout=defer_ok
3162 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3163 those file descriptors could be used for SMTP connections. If anything
3164 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3165 could be sent to the SMTP client, causing chaos. The daemon now opens
3166 stdin, stdout, and stderr to /dev/null when it puts itself into the
3169 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3170 log by default. The user can override this with suitable Perl magic.
3172 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3173 the log message when discard triggers, was not working for the DATA ACL or
3174 for the non-SMTP ACL.
3176 78. Error message wording change in sieve.c.
3178 79. If smtp_accept_max_per_host was set, the number of connections could be
3179 restricted to fewer than expected, because the daemon was trying to set up
3180 a new connection before checking whether the processes handling previous
3181 connections had finished. The check for completed processes is now done
3182 earlier. On busy systems, this bug wouldn't be noticed because something
3183 else would have woken the daemon, and it would have reaped the completed
3186 80. If a message was submitted locally by a user whose login name contained one
3187 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3188 It caused a spool format error. I have fixed the spool reading code. A
3189 related problem was that the "from" clause in the Received: line became
3190 illegal because of the space(s). It is now covered by ${quote_local_part.
3192 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3195 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3197 83. Patch from Sieve maintainer to fix unterminated string problem in
3198 "vacation" handling.
3200 84. Some minor changes to the Linux configuration files to help with other
3201 OS variants using glibc.
3203 85. One more patch for Sieve to update vacation handling to latest spec.
3206 ----------------------------------------------------
3207 See the note above about the 4.44 and 4.50 releases.
3208 ----------------------------------------------------
3214 1. Change 4.43/35 introduced a bug that caused file counts to be
3215 incorrectly computed when quota_filecount was set in an appendfile
3218 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3219 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3222 3. Give more explanation in the error message when the command for a transport
3223 filter fails to execute.
3225 4. There are several places where Exim runs a non-Exim command in a
3226 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3227 was being done only for the command run by the queryprogram router. It is
3228 now done for all such subprocesses. The other cases are: ${run, transport
3229 filters, and the commands run by the lmtp and pipe transports.
3231 5. Some older OS have a limit of 256 on the maximum number of file
3232 descriptors. Exim was using setrlimit() to set 1000 as a large value
3233 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3234 systems. I've change it so that if it can't get 1000, it tries for 256.
3236 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3237 was an oversight, and furthermore, ever since the addition of extra
3238 controls (e.g. 4.43/32), the checks on when to allow different forms of
3239 "control" were broken. There should now be diagnostics for all cases when a
3240 control that does not make sense is encountered.
3242 7. $recipients is now available in the predata ACL (oversight).
3244 8. Tidy the search cache before the fork to do a delivery from a message
3245 received from the command line. Otherwise the child will trigger a lookup
3246 failure and thereby defer the delivery if it tries to use (for example) a
3247 cached ldap connection that the parent has called unbind on.
3249 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3250 of $address_data from the recipient verification was clobbered by the
3251 sender verification.
3253 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3254 was its contents. (It was OK if the option was not defined at all.)
3256 11. A "Completed" log line is now written for messages that are removed from
3257 the spool by the -Mrm option.
3259 12. $host_address is now set to the target address during the checking of
3260 ignore_target_hosts.
3262 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3263 being passed; this would have caused $sender_host_name to have been used if
3264 matching the list had actually called for a host name (not very likely,
3265 since this list is usually IP addresses). A host name is now passed as
3268 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3269 code that specifies a non-restarting handler (typically sigaction() in
3270 modern systems) in an attempt to fix a rare and obscure crash bug.
3272 15. Narrowed the window for a race in the daemon that could cause it to ignore
3273 SIGCHLD signals. This is not a major problem, because they are used only to
3274 wake it up if nothing else does.
3276 16. A malformed maildirsize file could cause Exim to calculate negative values
3277 for the mailbox size or file count. Odd effects could occur as a result.
3278 The maildirsize information is now recalculated if the size or filecount
3281 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3282 support for a long time. Removed HAVE_SYS_VFS_H.
3284 18. Updated exipick to current release from John Jetmore.
3286 19. Allow an empty sender to be matched against a lookup in an address list.
3287 Previously the only cases considered were a regular expression, or an
3290 20. Exim went into a mad DNS lookup loop when doing a callout where the
3291 host was specified on the transport, if the DNS lookup yielded more than
3294 21. The RFC2047 encoding function was originally intended for short strings
3295 such as real names; it was not keeping to the 75-character limit for
3296 encoded words that the RFC imposes. It now respects the limit, and
3297 generates multiple encoded words if necessary. To be on the safe side, I
3298 have increased the buffer size for the ${rfc2047: expansion operator from
3301 22. Failure to deliver a bounce message always caused it to be frozen, even if
3302 there was an errors_to setting on the router. The errors_to setting is now
3305 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3306 canonical form (fully expanded) before being placed in
3307 $sender_host_address.
3309 24. Updated eximstats to version 1.33
3311 25. Include certificate and key file names in error message when GnuTLS fails
3312 to set them up, because the GnuTLS error message doesn't include the name
3313 of the failing file when there is a problem reading it.
3315 26. Expand error message when OpenSSL has problems setting up cert/key files.
3318 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3319 (this can affect the format of dates).
3321 28. exim_tidydb, when checking for the continued existence of a message for
3322 which it has found a message-specific retry record, was not finding
3323 messages that were in split spool directories. Consequently, it was
3324 deleting retry records that should have stayed in existence.
3326 29. eximstats updated to version 1.35
3327 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3328 1.35 - bugfix such that pie charts by volume are generated correctly
3330 30. The SPA authentication driver was not abandoning authentication and moving
3331 on to the next authenticator when an expansion was forced to fail,
3332 contradicting the general specification for all authenticators. Instead it
3333 was generating a temporary error. It now behaves as specified.
3335 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3336 (the order specifies the preference for clients). The order is now AES256,
3337 AES128, 3DES, ARCFOUR128.
3339 31. Small patch to Sieve code - explicitly set From: when generating an
3342 32. Exim crashed if a remote delivery caused a very long error message to be
3343 recorded - for instance if somebody sent an entire SpamAssassin report back
3344 as a large number of 550 error lines. This bug was coincidentally fixed by
3345 increasing the size of one of Exim's internal buffers (big_buffer) that
3346 happened as part of the Exiscan merge. However, to be on the safe side, I
3347 have made the code more robust (and fixed the comments that describe what
3350 33. Some experimental protocols are using DNS PTR records for new purposes. The
3351 keys for these records are domain names, not reversed IP addresses. The
3352 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3353 leaves it alone. Component reversal etc. now happens only for IP addresses.
3356 34. The host_aton() function is supposed to be passed a string that is known
3357 to be a valid IP address. However, in the case of IPv6 addresses, it was
3358 not checking this. This is a hostage to fortune. Exim now panics and dies
3359 if the condition is not met. A case was found where this could be provoked
3360 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3361 components; fortuitously, this particular loophole had already been fixed
3362 by change 4.50/55 or 4.44/33 above.
3364 If there are any other similar loopholes, the new check in host_aton()
3365 itself should stop them being exploited. The report I received stated that
3366 data on the command line could provoke the exploit when Exim was running as
3367 exim, but did not say which command line option was involved. All I could
3368 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3369 running as the user.
3372 35. There was a buffer overflow vulnerability in the SPA authentication code
3373 (which came originally from the Samba project). I have added a test to the
3374 spa_base64_to_bits() function which I hope fixes it.
3377 36. The daemon start-up calls getloadavg() while still root for those OS that
3378 need the first call to be done as root, but it missed one case: when
3379 deliver_queue_load_max is set with deliver_drop_privilege. This is
3380 necessary for the benefit of the queue runner, because there is no re-exec
3381 when deliver_drop_privilege is set.
3383 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3384 was in use, was not putting the data itself into the right store pool;
3385 consequently, it could be overwritten for a subsequent message in the same
3386 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3389 38. Sometimes the final signoff response after QUIT could fail to get
3390 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3391 < 0 before doing a fflush(). This bug looks as though it goes back to the
3392 introduction of TLS in release 3.20, but "sometimes" must have been rare
3393 because the tests only now provoked it.
3399 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3400 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3401 Now it returns an integer. A number of calls were still expecting a T/F
3402 return. Fortuitously, in all cases, the tests worked in OK situations,
3403 which is the norm. However, things would have gone wrong on any write
3404 failures on the smtp file descriptor. This function is used when sending
3405 messages over SMTP and also when doing verify callouts.
3407 2. When Exim is called to do synchronous delivery of a locally submitted
3408 message (the -odf or -odi options), it no longer closes stderr before doing
3411 3. Implemented the mua_wrapper option.
3413 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3415 5. Implemented the functions header_remove(), header_testname(),
3416 header_add_at_position(), and receive_remove_recipient(), and exported them
3419 6. If an ACL "warn" statement specified the addition of headers, Exim already
3420 inserted X-ACL-Warn: at the start if there was no header name. However, it
3421 was not making this test for the second and subsequent header lines if
3422 there were newlines in the string. This meant that an invalid header could
3423 be inserted if Exim was badly configured.
3425 7. Allow an ACL "warn" statement to add header lines at the start or after all
3426 the Received: headers, as well as at the end.
3428 8. Added the rcpt_4xx retry error code.
3430 9. Added postmaster_mailfrom=xxx to callout verification option.
3432 10. Added mailfrom=xxxx to the callout verification option, for verify=
3435 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3436 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3438 12. Inserted some casts to stop certain compilers warning when using pointer
3439 differences as field lengths or precisions in printf-type calls (mostly
3440 affecting debugging statements).
3442 13. Added optional readline() support for -be (dynamically loaded).
3444 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3445 same clock tick as a message's arrival, so that its received time was the
3446 same as the "first fail" time on the retry record, and that message
3447 remained on the queue past the ultimate address timeout, every queue runner
3448 would try a delivery (because it was past the ultimate address timeout) but
3449 after another failure, the ultimate address timeout, which should have then
3450 bounced the address, did not kick in. This was a "< instead of <=" error;
3451 in most cases the first failure would have been in the next clock tick
3452 after the received time, and all would be well.
3454 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3455 being recognized when the domain list was tested by the match_domain
3456 condition in an expansion string.
3458 16. Added the ${str2b64: operator.
3460 17. Exim was always calling setrlimit() to set a large limit for the number of
3461 processes, without checking whether the existing limit was already
3462 adequate. (It did check for the limit on file descriptors.) Furthermore,
3463 errors from getrlimit() and setrlimit() were being ignored. Now they are
3464 logged to the main and panic logs, but Exim does carry on, to try to do its
3465 job under whatever limits there are.
3467 18. Imported PCRE 5.0.
3469 19. Trivial typo in log message " temporarily refused connection" (the leading
3472 20. If the log selector return_path_on_delivery was set and an address was
3473 redirected to /dev/null, the delivery process crashed because it assumed
3474 that a return path would always be set for a "successful" delivery. In this
3475 case, the whole delivery is bypassed as an optimization, and therefore no
3478 21. Internal re-arrangement: the function for sending a challenge and reading
3479 a response while authentication was assuming a zero-terminated challenge
3480 string. It's now changed to take a pointer and a length, to allow for
3481 binary data in such strings.
3483 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3485 23. Exim was not respecting finduser_retries when seeking the login of the
3486 uid under which it was called; it was always trying 10 times. (The default
3487 setting of finduser_retries is zero.) Also, it was sleeping after the final
3488 failure, which is pointless.
3490 24. Implemented tls_on_connect_ports.
3492 25. Implemented acl_smtp_predata.
3494 26. If the domain in control=submission is set empty, Exim assumes that the
3495 authenticated id is a complete email address when it generates From: or
3496 Sender: header lines.
3498 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3499 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3500 chown and chgrp in /bin and hostname in /usr/bin.
3502 28. Exim was keeping the "process log" file open after each use, just as it
3503 does for the main log. This opens the possibility of it remaining open for
3504 long periods when the USR1 signal hits a daemon. Occasional processlog
3505 errors were reported, that could have been caused by this. Anyway, it seems
3506 much more sensible not to leave this file open at all, so that is what now
3509 29. The long-running daemon process does not normally write to the log once it
3510 has entered its main loop, and it closes the log before doing so. This is
3511 so that log files can straightforwardly be renamed and moved. However,
3512 there are a couple of unusual error situations where the daemon does write
3513 log entries, and I had neglected to close the log afterwards.
3515 30. The text of an SMTP error response that was received during a remote
3516 delivery was being truncated at 512 bytes. This is too short for some of
3517 the long messages that one sometimes sees. I've increased the limit to
3520 31. It is now possible to make retry rules that apply only when a message has a
3521 specific sender, in particular, an empty sender.
3523 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3524 it possible to be selective about when SMTP synchronization is enforced.
3526 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3528 32. Implemented hosts_connection_nolog.
3530 33. Added an ACL for QUIT.
3532 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3535 35. Added mailbox_size and mailbox_filecount to appendfile.
3537 36. Added control = no_multiline_responses to ACLs.
3539 37. There was a bug in the logic of the code that waits for the clock to tick
3540 in the case where the clock went backwards by a substantial amount such
3541 that the microsecond fraction of "now" was more than the microsecond
3542 fraction of "then" (but the whole seconds number was less).
3544 38. Added support for the libradius Radius client library this is found on
3545 FreeBSD (previously only the radiusclient library was supported).
3551 1. When certain lookups returned multiple values in the form name=value, the
3552 quoting of the values was not always being done properly. Specifically:
3553 (a) If the value started with a double quote, but contained no whitespace,
3555 (b) If the value contained whitespace other than a space character (i.e.
3556 tabs or newlines or carriage returns) it was not quoted.
3557 This fix has been applied to the mysql and pgsql lookups by writing a
3558 separate quoting function and calling it from the lookup code. The fix
3559 should probably also be applied to nisplus, ibase and oracle lookups, but
3560 since I cannot test any of those, I have not disturbed their existing code.
3562 2. A hit in the callout cache for a specific address caused a log line with no
3563 reason for rejecting RCPT. Now it says "Previous (cached) callout
3564 verification failure".
3566 3. There was an off-by-one bug in the queryprogram router. An over-long
3567 return line was truncated at 256 instead of 255 characters, thereby
3568 overflowing its buffer with the terminating zero. As well as fixing this, I
3569 have increased the buffer size to 1024 (and made a note to document this).
3571 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3572 when Exim is waiting for an SMTP response from a remote server, Exim
3573 restarts its select() call on the socket, thereby resetting its timeout.
3574 This is not a problem when such interrupts are rare. Somebody set up a cron
3575 job to run exiwhat every 2 minutes, which is less than the normal select()
3576 timeout (5 or 10 minutes). This meant that the select() timeout never
3577 kicked in because it was always reset. I have fixed this by comparing the
3578 time when an interrupt arrives with the time at the start of the first call
3579 to select(). If more time than the timeout has elapsed, the interrupt is
3580 treated as a timeout.
3582 5. Some internal re-factoring in preparation for the addition of Sieve
3583 extensions (by MH). In particular, the "personal" test is moved to a
3584 separate function, and given an option for scanning Cc: and Bcc: (which is
3585 not set for Exim filters).
3587 6. When Exim created an email address using the login of the caller as the
3588 local part (e.g. when creating a From: or Sender: header line), it was not
3589 quoting the local part when it contained special characters such as @.
3591 7. Installed new OpenBSD configuration files.
3593 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3594 try to make them clearer.
3596 9. Callout options, other than the timeout value, were being ignored when
3597 verifying sender addresses in header lines. For example, when using
3599 verify = header_sender/callout=no_cache
3601 the cache was (incorrectly) being used.
3603 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3604 only the Cygwin environment.
3606 11. When return_path_on_delivery was set as a log selector, if different remote
3607 addresses in the same message used different return paths and parallel
3608 remote delivery occurred, the wrong values would sometimes be logged.
3609 (Whenever a remote delivery process finished, the return path value from
3610 the most recently started remote delivery process was logged.)
3612 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3613 lines when AUTH and/or TLS are in use. This is the "received protocol"
3614 field. Exim used to use "asmtp" for authenticated SMTP, without any
3615 indication (in the protocol name) for TLS use. Now it follows the RFC and
3616 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3617 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3618 names appear in log lines as well as in Received: header lines.
3620 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3621 extensions, and comparison tests, and to fix some bugs.
3623 14. Changes to the "personal" filter test:
3625 (1) The test was buggy in that it was just doing the equivalent of
3626 "contains" tests on header lines. For example, if a user's address was
3627 anne@some.where, the "personal" test would incorrectly be true for
3629 To: susanne@some.where
3631 This test is now done by extracting each address from the header in turn,
3632 and checking the entire address. Other tests that are part of "personal"
3633 are now done using regular expressions (for example, to check local parts
3634 of addresses in From: header lines).
3636 (2) The list of non-personal local parts in From: addresses has been
3637 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3638 taken from the Sieve specification recommendations.
3640 (3) If the message contains any header line starting with "List-" it is
3641 treated as non-personal.
3643 (4) The test for "circular" in the Subject: header line has been removed
3644 because it now seems ill-conceived.
3646 15. Minor typos in src/EDITME comments corrected.
3648 16. Installed latest exipick from John Jetmore.
3650 17. If headers_add on a router specified a text string that was too long for
3651 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3652 of string_sprintf() is now avoided.
3654 18. $message_body_size was not set (it was always zero) when running the DATA
3655 ACL and the local_scan() function.
3657 19. For the "mail" command in an Exim filter, no default was being set for
3658 the once_repeat time, causing a random time value to be used if "once" was
3659 specified. (If the value happened to be <= 0, no repeat happened.) The
3660 default is now 0s, meaning "never repeat". The "vacation" command was OK
3661 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3662 (I found it when inspecting the code).
3664 20. There is now an overall timeout for performing a callout verification. It
3665 defaults to 4 times the callout timeout, which applies to individual SMTP
3666 commands during the callout. The overall timeout applies when there is more
3667 than one host that can be tried. The timeout is checked before trying the
3668 next host. This prevents very long delays if there are a large number of
3669 hosts and all are timing out (e.g. when the network connections are timing
3670 out). The value of the overall timeout can be changed by specifying an
3671 additional sub-option for "callout", called "maxwait". For example:
3673 verify = sender/callout=5s,maxwait=20s
3675 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3676 to the end before writing, but this should make it even safer).
3678 22. Exim was forgetting that it had advertised PIPELINING for the second and
3679 subsequent messages on an SMTP connection. It was also not resetting its
3680 memory on STARTTLS and an internal HELO.
3682 23. When Exim logs an SMTP synchronization error within a session, it now
3683 records whether PIPELINING has been advertised or not.
3685 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3686 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3687 rather than long int.
3689 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3691 26. Added the never_mail option to autoreply.
3697 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3698 crash if the getsockname() call failed; this can happen if a connection is
3699 closed very soon after it is established. The problem was simply in the
3700 order in which certain operations were done, causing Exim to try to write
3701 to the SMTP stream before it had set up the file descriptor. The bug has
3702 been fixed by making things happen in the correct order.
3708 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3709 before the connection was closed, thus losing the rejection response.
3711 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3712 some early Solaris releases, but causes trouble in current releases where
3713 socklen_t is defined.
3715 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3718 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3721 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3722 that releasing the top of it at the end releases what was used for sub-
3723 expansions (unless the block got too big). However, discard this block if
3724 the first thing is a variable or header, so that we can use its block when
3725 it is dynamic (useful for very large $message_headers, for example).
3727 6. Lookups now cache *every* query, not just the most recent. A new, separate
3728 store pool is used for this. It can be recovered when all lookup caches are
3729 flushed. Lookups now release memory at the end of their result strings.
3730 This has involved some general refactoring of the lookup sources.
3732 7. Some code has been added to the store_xxx() functions to reduce the amount
3733 of flapping under certain conditions.
3735 8. log_incoming_interface used to affect only the <= reception log lines. Now
3736 it causes the local interface and port to be added to several more SMTP log
3737 lines, for example "SMTP connection from", and rejection lines.
3739 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3741 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3743 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3744 could be overwritten at the end of the current message (or the start of a
3745 new message if it was set in a HELO ACL). The value is now preserved for
3746 the duration of the SMTP connection.
3748 12. If a transport had a headers_rewrite setting, and a matching header line
3749 contained an unqualified address, that address was qualified, even if it
3750 did not match any rewriting rules. The underlying bug was that the values
3751 of the flags that permit the existence of unqualified sender and recipient
3752 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3753 non-local messages, and by -bnq for local messages) were not being
3754 preserved with the message after it was received.
3756 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3757 "next input=" as part of the text comprising the host identity instead of
3758 the correct text. The code was using the same buffer for two different
3759 strings. However, depending on which order the printing function evaluated
3760 its arguments, the bug did not always show up. Under Linux, for example, my
3761 test suite worked just fine.
3763 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3764 doesn't work with some older versions of Perl. It has been changed to "my",
3765 which in any case is probably the better facility to use.
3767 15. A really picky compiler found some instances of statements for creating
3768 error messages that either had too many or two few arguments for the format
3771 16. The size of the buffer for calls to the DNS resolver has been increased
3772 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3773 for addresses that have a lot of PTR records. This alleviates a problem; it
3774 does not fully solve it.
3776 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3777 buffer now truncates the list and logs the incident, which is the same
3778 action as happens when Exim is looking up a host name and its aliases.
3779 Previously in this situation something unpredictable would happen;
3780 sometimes it was "internal error: store_reset failed".
3782 18. If a server dropped the connection unexpectedly when an Exim client was
3783 using GnuTLS and trying to read a response, the client delivery process
3784 crashed while trying to generate an error log message.
3786 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3787 string, for example:
3789 warn message = H1: something\nH2: something
3791 the text was added as a single header line from Exim's point of view
3792 though it ended up OK in the delivered message. However, searching for the
3793 second and subsequent header lines using $h_h2: did not work. This has been
3794 fixed. Similarly, if a system filter added multiple headers in this way,
3795 the routers could not see them.
3797 20. Expanded the error message when iplsearch is called with an invalid key to
3798 suggest using net-iplsearch in a host list.
3800 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3801 ACLs are no longer actually imposed (and a message to that effect is
3804 22. If a "gecos" field in a passwd entry contained escaped characters, in
3805 particular, if it contained a \" sequence, Exim got it wrong when building
3806 a From: or a Sender: header from that name. A second bug also caused
3807 incorrect handling when an unquoted " was present following a character
3808 that needed quoting.
3810 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3811 was not being matched caselessly.
3813 24. Arranged for all hyphens in the exim.8 source to be escaped with
3816 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3817 properly. Recipient callout cache records were still being keyed to include
3818 the sender, even when use_sender was set false. This led to far more
3819 callouts that were necessary. The sender is no longer included in the key
3820 when use_sender is false.
3822 26. Added "control = submission" modifier to ACLs.
3824 27. Added the ${base62d: operator to decode base 62 numbers.
3826 28. dnsdb lookups can now access SRV records.
3828 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3829 the configuration file.
3831 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3832 (-v) mode. This makes the output for a verbose queue run more intelligible.
3834 31. Added a use_postmaster feature to recipient callouts.
3836 32. Added the $body_zerocount variable, containing the number of binary zero
3837 bytes in the message body.
3839 33. The time of last modification of the "new" subdirectory is now used as the
3840 "mailbox time last read" when there is a quota error for a maildir
3843 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3845 35. Added +ignore_unknown as a special item in host lists.
3847 36. Code for decoding IPv6 addresses in host lists is now included, even if
3848 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3849 address was recognized as an IP address, but was then not correctly decoded
3850 into binary, causing unexpected and incorrect effects when compared with
3857 1. Very minor rewording of debugging text in manualroute to say "list of
3858 hosts" instead of "hostlist".
3860 2. If verify=header_syntax was set, and a header line with an unqualified
3861 address (no domain) and a large number of spaces between the end of the
3862 name and the colon was received, the reception process suffered a buffer
3863 overflow, and (when I tested it) crashed. This was caused by some obsolete
3864 code that should have been removed. The fix is to remove it!
3866 3. When running in the test harness, delay a bit after writing a bounce
3867 message to get a bit more predictability in the log output.
3869 4. Added a call to search_tidyup() just before forking a reception process. In
3870 theory, someone could use a lookup in the expansion of smtp_accept_max_
3871 per_host which, without the tidyup, could leave open a database connection.
3873 5. Added the variables $recipient_data and $sender_data which get set from a
3874 lookup success in an ACL "recipients" or "senders" condition, or a router
3875 "senders" option, similar to $domain_data and $local_part_data.
3877 6. Moved the writing of debug_print from before to after the "senders" test
3880 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3881 problems for message scanning, either using a data ACL, or using
3882 local_scan() because the Received: header was not generated till after they
3883 were called (in order to set the time as the time of reception completion).
3884 I have revised the way this works. The header is now generated after the
3885 body is received, but before the ACL or local_scan() are called. After they
3886 are run, the timestamp in the header is updated.
3892 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3893 before starting a queue runner without re-exec. This happened only when
3894 deliver_drop_privilege was set or when the Exim user was set to root. The
3895 effect of the bug was that timeouts during subsequent deliveries caused
3896 crashes instead of being properly handled. The handler is now left at its
3897 default (and expected) setting.
3899 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3900 message, again when deliver_drop_privilege is set or Exim is run as root.
3901 The bug described in (1) was not present in this case, but the tidying up
3902 of the other signals was missing. I have made the two cases consistent.
3904 3. The ignore_target_hosts setting on a manualroute router was being ignored
3905 for hosts that were looked up using the /MX notation.
3907 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3910 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3911 operated on the sender address. After changing the $sender_address to <>
3912 for the sender address verify, Exim was re-instated it as the original
3913 (before rewriting) address, but remembering that it had rewritten it, so it
3914 wasn't rewriting it again. This bug also had the effect of breaking the
3915 sender address verification caching when the sender address was rewritten.
3917 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3918 This has been changed so that if the ip literal address matches
3919 ignore_target_hosts, the router declines.
3921 7. Added expansion conditions match_domain, match_address, and match_local_
3922 part (NOT match_host).
3924 8. The placeholder for the Received: header didn't have a length field set.
3926 9. Added code to Exim itself and to exim_lock to test for a specific race
3927 condition that could lead to file corruption when using MBX delivery. The
3928 issue is with the lockfile that is created in /tmp. If this file is removed
3929 after a process has opened it but before that process has acquired a lock,
3930 there is the potential for a second process to recreate the file and also
3931 acquire a lock. This could lead to two Exim processes writing to the file
3932 at the same time. The added code performs the same test as UW imapd; it
3933 checks after acquiring the lock that its file descriptor still refers to
3934 the same named file.
3936 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3937 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3940 11. Added the smtp_active_hostname option. If used, this will typically be made
3941 to depend on the incoming interface address. Because $interface_address is
3942 not set up until the daemon has forked a reception process, error responses
3943 that can happen earlier (such as "too many connections") no longer contain
3946 12. If an expansion in a condition on a "warn" statement fails because a lookup
3947 defers, the "warn" statement is abandoned, and the next ACL statement is
3948 processed. Previously this caused the whole ACL to be aborted.
3950 13. Added the iplsearch lookup type.
3952 14. Added ident_timeout as a log selector.
3954 15. Added tls_certificate_verified as a log selector.
3956 16. Added a global option tls_require_ciphers (compare the smtp transport
3957 option of the same name). This controls incoming TLS connections.
3959 17. I finally figured out how to make tls_require_ciphers do a similar thing
3960 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3961 before starting the TLS session.
3963 18. Tabs are now shown as \t in -bP output.
3965 19. If the log selector return_path_on_delivery was set, Exim crashed when
3966 bouncing a message because it had too many Received: header lines.
3968 20. If two routers both had headers_remove settings, and the first one included
3969 a superfluous trailing colon, the final name in the first list and the
3970 first name in the second list were incorrectly joined into one item (with a
3971 colon in the middle).
3977 1. Added -C and -D options to the exinext utility, mainly to make it easier
3978 to include in the automated testing, but these could be helpful when
3979 multiple configurations are in use.
3981 2. The exinext utility was not formatting the output nicely when there was
3982 an alternate port involved in the retry record key, nor when there was a
3983 message id as well (for retries that were specific to a specific message
3984 and a specific host). It was also confused by IPv6 addresses, because of
3985 the additional colons they contain. I have fixed the IPv4 problem, and
3986 patched it up to do a reasonable job for IPv6.
3988 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3989 delivery, the log line now contains "pipelined" if PIPELINING was used.
3991 4. An SMTP transport process used to panic and die if the bind() call to set
3992 an explicit outgoing interface failed. This has been changed; it is now
3993 treated in the same way as a connect() failure.
3995 5. A reference to $sender_host_name in the part of a conditional expansion
3996 that was being skipped was still causing a DNS lookup. This no longer
3999 6. The def: expansion condition was not recognizing references to header lines
4000 that used bh_ and bheader_.
4002 7. Added the _cache feature to named lists.
4004 8. The code for checking quota_filecount in the appendfile transport was
4005 allowing one more file than it should have been.
4007 9. For compatibility with Sendmail, the command line option
4015 and sets the incoming protocol and host name (for trusted callers). The
4016 host name and its colon can be omitted when only the protocol is to be set.
4017 Note the Exim already has two private options, -pd and -ps, that refer to
4018 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4019 "s", but I don't think that's a major issue.
4021 10. A number of refactoring changes to the code, none of which should affect
4024 (a) The number of logging options was getting close to filling up the
4025 32-bit word that was used as a bit map. I have split them into two classes:
4026 those that are passed in the argument to log_write(), and those that are
4027 only ever tested independently outside of that function. These are now in
4028 separate 32-bit words, so there is plenty of room for expansion again.
4029 There is no change in the user interface or the logging behaviour.
4031 (b) When building, for example, log lines, the code previously used a
4032 macro that called string_cat() twice, in order to add two strings. This is
4033 not really sufficiently general. Furthermore, there was one instance where
4034 it was actually wrong because one of the argument was used twice, and in
4035 one call a function was used. (As it happened, calling the function twice
4036 did not affect the overall behaviour.) The macro has been replaced by a
4037 function that can join an arbitrary number of extra strings onto a growing
4040 (c) The code for expansion conditions now uses a table and a binary chop
4041 instead of a serial search (which was left over from when there were very
4042 few conditions). Also, it now recognizes conditions like "pam" even when
4043 the relevant support is not compiled in: a suitably worded error message is
4044 given if an attempt is made to use such a condition.
4046 11. Added ${time_interval:xxxxx}.
4048 12. A bug was causing one of the ddress fields not to be passed back correctly
4049 from remote delivery subprocesses. The field in question was not being
4050 subsequently used, so this caused to problems in practice.
4052 13. Added new log selectors queue_time and deliver_time.
4054 14. Might have fixed a bug in maildirsizefile handling that threw up
4055 "unexpected character" debug warnings, and recalculated the data
4056 unnecessarily. In any case, I expanded the warning message to give more
4059 15. Added the message "Restricted characters in address" to the statements in
4060 the default ACL that block characters like @ and % in local parts.
4062 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4063 Three changes have been made:
4065 (a) There was a serious bug; a negative response to MAIL caused the whole
4066 recipient domain to be cached as invalid, thereby blocking all messages
4067 to all local parts at the same domain, from all senders. This bug has
4068 been fixed. The domain is no longer cached after a negative response to
4069 MAIL if the sender used is not empty.
4071 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4074 (c) A new callout option, "use_sender" has been added for people who want
4075 the modified behaviour.
4081 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4084 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4085 indeed breaks things for older releases.
4087 3. Added additional logging to the case where there is a problem reading data
4088 from a filter that is running in a subprocess using a pipe, in order to
4089 try to track down a specific problem.
4091 4. Testing facility fudge: when running in the test harness and attempting
4092 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4093 getting "No route to host". Convert this to a timeout.
4095 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4098 6. Some OS don't have socklen_t but use size_t instead. This affects the
4099 fifth argument of getsockopt() amongst other things. This is now
4100 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4101 can be set for individual OS. I have set it for SunOS5, OSF1, and
4102 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4103 some earlier ones do not.
4105 7. Change 4.30/15 was not doing the test caselessly.
4107 8. The standard form for an IPv6 address literal was being rejected by address
4108 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4109 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4110 this, as well as the form without the "IPv6" on the front (but only when
4111 address literals are enabled, of course).
4113 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4115 10. Exim crashed if a message with an empty sender address specified by -f
4116 encountered a router with an errors_to setting. This could be provoked only
4117 by a command such as
4121 where an empty string was supplied; "<>" did not hit this bug.
4123 11. Installed PCRE release 4.5.
4125 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4126 remained set. It is now erased.
4128 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4129 times from message ids (which are base 36 rather than the normal 62).
4131 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4132 were being counted as actual protocol errors, and logged if the log
4133 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4134 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4135 and DATA following a set of rejected RCPTs do not count as protocol errors.
4136 In other words, Exim assumes they were pipelined, though this may not
4137 actually be the case. Of course, in all cases the client gets an
4138 appropriate error code.
4140 15. If a lookup fails in an ACL condition, a message about the failure may
4141 be available; it is used if testing the ACL cannot continue, because most
4142 such messages specify what the cause of the deferral is. However, some
4143 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4144 that caused an old message to be retained and used if a later statement
4145 caused a defer, replacing the real cause of the deferral.
4147 16. If an IP address had so many PTR records that the DNS lookup buffer
4148 was not large enough to hold them, Exim could crash while trying to process
4149 the truncated data. It now detects and logs this case.
4151 17. Further to 4.21/58, another change has been made: if (and only if) the
4152 first line of a message (the first header line) ends with CRLF, a bare LF
4153 in a subsequent header line has a space inserted after it, so as not to
4154 terminate the header.
4156 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4157 unnecessarily, used atoi() instead of strtol(), and didn't check the
4158 termination when getting file sizes from file names by regex.
4160 19. Completely re-implemented the support for maildirsize files, in the light
4161 of a number of problems with the previous contributed implementation
4162 (4.30/29). In particular:
4164 . If the quota is zero, the maildirsize file is maintained, but no quota is
4167 . If the maildir directory does not exist, it is created before any attempt
4168 to write a maildirsize file.
4170 . The quota value in the file is just a cache; if the quota is changed in
4171 the transport, the new value overrides.
4173 . A regular expression is available for excluding directories from the
4176 20. The autoreply transport checks the characters in options that define the
4177 message's headers; it allows continued headers, but it was checking with
4178 isspace() after an embedded newline instead of explicitly looking for a
4181 21. If all the "regular" hosts to which an address was routed had passed their
4182 expiry times, and had not reached their retry times, the address was
4183 bounced, even if fallback hosts were defined. Now Exim should go on to try
4186 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4187 equivalent code in the SMTP transport. Some hosts send humungous responses
4188 to HELO/EHLO, more than 1024 it seems.
4190 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4191 gives compiler warnings in some environments. I've now done it "properly",
4194 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4195 (because of problems with the built-in one) was declared to return uschar *
4196 instead of char *, causing compiler failure.
4198 25. Fixed a file descriptor leak when processing alias/forward files.
4200 26. Fixed a minor format string issue in dbfn.c.
4202 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4204 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4205 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4208 29. When a sender address is verified, it is cached, to save repeating the test
4209 when there is more than one recipient in a message. However, when the
4210 verification involves a callout, it is possible for different callout
4211 options to be set for different recipients. It is too complicated to keep
4212 track of this in the cache, so now Exim always runs a verification when a
4213 callout is required, relying on the callout cache for the optimization.
4214 The overhead is duplication of the address routing, but this should not be
4217 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4218 to be verified with callout=postmaster, and the main callout worked but the
4219 postmaster check failed, the verification correctly failed. However, if a
4220 subsequent RCPT command asked for sender verification *without* the
4221 postmaster check, incorrect caching caused this verification also to fail,
4224 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4225 it was not caching the DNS options (qualify_single, search_parents) that
4226 were used when the lookup failed. A subsequent lookup with different
4227 options therefore always gave the same answer, though there were cases
4228 where it should not have. (Example: a "domains = !$mx_any" option on a
4229 dnslookup router: the "domains" option is always processed without any
4230 widening, but the router might have qualify_single set.) Now Exim uses the
4231 cached value only when the same options are set.
4233 32. Added John Jetmore's "exipick" utility to the distribution.
4235 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4236 than a timeout (e.g. a certificate is required, and is not provided), an
4237 Exim server now closes the connection immediately. Previously it waited for
4238 the client to close - but if the client is SSL, it seems that they each
4239 wait for each other, leading to a delay before one of them times out.
4241 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4242 maintained 0.8.x compatibility because I don't think many are using it, and
4243 it is clearly obsolete.
4245 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4248 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4249 client certificate was expired. A simple patch fixes this, though I don't
4250 understand the full logic of why the verify callback is called multiple
4253 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4254 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4255 which causes problems with some clients (such as the Certicom SSL Plus
4256 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4257 disables the coutermeasure allowing Eudora to connect."
4259 38. Exim was not checking that a write() to a log file succeeded. This could
4260 lead to Bad Things if a log got too big, in particular if it hit a file
4261 size limit. Exim now panics and dies if it cannot write to a log file, just
4262 as it does if it cannot open a log file.
4264 39. Modified OS/Makefile-Linux so that it now contains
4266 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4268 The two -D definitions ensure that Exim is compiled with large file
4269 support, which makes it possible to handle log files that are bigger than
4272 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4273 instance) a domain was checked against a named list that involved a lookup,
4274 causing $domain_data to be set, then another domain was checked against the
4275 same list, then the first domain was re-checked, the value of $domain_data
4276 after the final check could be wrong. In particular, if the second check
4277 failed, it could be set empty. This bug probably also applied to
4280 41. The strip_trailing_dot option was not being applied to the address given
4281 with the -f command-line option.
4283 42. The code for reading a message's header from the spool was incrementing
4284 $received_count, but never initializing it. This meant that the value was
4285 incorrect (doubled) while delivering a message in the same process in which
4286 it was received. In the most common configuration of Exim, this never
4287 happens - a fresh exec is done - but it can happen when
4288 deliver_drop_privilege is set.
4290 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4291 it now includes up to 150 characters of the unexpected data in the log
4294 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4295 and building data strings. The size of both of these buffers was 10 000
4296 bytes - far larger than anybody would *ever* want, thought I. Needless to
4297 say, somebody hit the limit. I have increased the maximum line length to
4298 20 000 and the maximum data length of concatenated lines to 100 000. I have
4299 also fixed two bugs, because there was no checking on these buffers. Tsk,
4300 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4301 buffer is too small.
4303 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4304 lsearch lookups. Now it does.
4306 46. When parsing a route_list item in a manualroute router, a fixed-length
4307 buffer was used for the list of hosts. I made this 1024 bytes long,
4308 thinking that nobody would ever have a list of hosts that long. Wrong.
4309 Somebody had a whole pile of complicated expansion conditions, and the
4310 string was silently truncated, leading to an expansion error. It turns out
4311 that it is easier to change to an unlimited length (owing to other changes
4312 that have happened since this code was originally written) than to build
4313 structure for giving a limitation error. The length of the item that
4314 expands into the list of hosts is now unlimited.
4316 47. The lsearch lookup could not handle data where the length of text line was
4317 more than 4095 characters. Such lines were truncated, leading to shortened
4318 data being returned. It should now handle lines of any length.
4320 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4321 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4324 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4325 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4326 no longer happens in comment lines. A list of replacements is now placed
4327 at the head of all of the source files, except those whose only change is
4328 to replace PERL_COMMAND in the very first #! line.
4330 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4331 messages on the queue, with a bottom-up merge sort, using code contributed
4332 by Michael Haardt. This should make operations like -bp somewhat faster on
4333 large queues. It won't affect queue runners, except when queue_run_in_order
4336 51. Installed eximstats 1.31 in the distribution.
4338 52. Added support for SRV lookups to the dnslookup router.
4340 53. If an ACL referred to $message_body or $message_body_end, the value was not
4341 reset for any messages that followed in the same SMTP session.
4343 54. The store-handling optimization for building very long strings was not
4344 differentiating between the different store pools. I don't think this
4345 actually made any difference in practice, but I've tidied it.
4347 55. While running the routers to verify a sender address, $sender_address
4348 was still set to the sender address. This is wrong, because when routing to
4349 send a bounce to the sender, it would be empty. Therefore, I have changed
4350 it so that, while verifying a sender address, $sender_address is set to <>.
4351 (There is no change to what happens when verifying a recipient address.)
4353 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4354 target A or AAAA records (if not already returned) without resetting the
4355 qualify_single or search_parents options of the DNS resolver. These are
4356 inappropriate in this case because the targets of MX and SRV records must
4357 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4358 target that, when qualified, matched something in the local domain. These
4359 two options are now turned off when doing these lookups.
4361 57. It seems that at least some releases of Reiserfs (which does not have the
4362 concept of a fixed number of inodes) returns zero and not -1 for the
4363 number of available inodes. This interacted badly with check_spool_inodes,
4364 which assumed that -1 was the "no such thing" setting. What I have done is
4365 to check that the total number of inodes is greater than zero before doing
4366 the test of how many are available.
4368 58. When a "warn" ACL statement has a log_message modifier, the message is
4369 remembered, and not repeated. This is to avoid a lot of repetition when a
4370 message has many recipients that cause the same warning to be written.
4371 Howewer, Exim was preserving the list of already written lines for an
4372 entire SMTP session, which doesn't seem right. The memory is now reset if a
4373 new message is started.
4375 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4376 debugging output unless log_rewrite was also set.
4378 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4379 of (int)(handle) when we know that handle contains (void *)(-1).
4381 61. The Exim daemon panic-logs an error return when it closes the incoming
4382 connection. However "connection reset by peer" seems to be common, and
4383 isn't really an error worthy of noting specially, so that particular error
4386 62. When Exim is trying to find all the local interfaces, it used to panic and
4387 die if the ioctl to get the interface flags failed. However, it seems that
4388 on at least one OS (Solaris 9) it is possible to have an interface that is
4389 included in the list of interfaces, but for which you get a failure error
4390 for this call. This happens when the interface is not "plumbed" into a
4391 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4392 failure of the "get flags" call assumes that the interface is down.
4394 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4395 makes life easier for people who are doing arithmetic on fields extracted
4396 from dates, where you often get leading zeros that should not be
4397 interpreted as octal.
4399 64. Added qualify_domain to the redirect router, to override the global
4402 65. If a pathologically long header line contained very many addresses (the
4403 report of this problem mentioned 10 000) and each of them was rewritten,
4404 Exim could use up a very large amount of memory. (It kept on making new
4405 copies of the header line as it rewrote, and never released the old ones.)
4406 At the expense of a bit more processing, the header rewriting function has
4407 been changed so that it no longer eats memory in this way.
4409 66. The generation of the Received: header has been moved from the time that a
4410 message starts to be received, to the time that it finishes. The timestamp
4411 in the Received: header should now be very close to that of the <= log
4412 line. There are two side-effects of this change:
4414 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4415 logged header lines no longer include the local Received: line, because
4416 it has not yet been created. The same applies to a copy of the message
4417 that is returned to a non-SMTP sender when a message is rejected.
4419 (b) When a filter file is tested using -bf, no additional Received: header
4420 is added to the test message. After some thought, I decided that this
4423 This change does not affect the value of $received_for. It is still set
4424 after address rewriting, but before local_scan() is called.
4426 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4428 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4429 gave an unhelpful panic error message, and a defer error. I have managed to
4430 change this behaviour so that it now rejects any supplied certificate,
4431 which seems right, as the list of acceptable certificates is empty.
4433 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4434 gave an unhelpful defer error. I have not managed to make this reject any
4435 supplied certificates, but the error message it gives is "no certificate
4436 supplied", which is not helpful.
4438 70. exigrep's output now also includes lines that are not associated with any
4439 message, but which match the given pattern. Implemented by a patch from
4440 Martin Sluka, which also tidied up the Perl a bit.
4442 71. Recipient callout verification, like sender verification, was using <> in
4443 the MAIL FROM command. This isn't really the right thing, since the actual
4444 sender may affect whether the remote host accepts the recipient or not. I
4445 have changed it to use the actual sender in the callout; this means that
4446 the cache record is now keyed on a recipient/sender pair, not just the
4447 recipient address. There doesn't seem to be a real danger of callout loops,
4448 since a callout by the remote host to check the sender would use <>.
4449 [SEE ABOVE: changed after hitting problems.]
4451 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4452 temporary errors. However, in the case of such a code being given after
4453 the end of a data transmission (i.e. after ".") Exim was failing to write
4454 a retry record for the message. (Yes, there was some broken host that was
4455 actually sending 8xx at this point.)
4457 73. An unknown lookup type in a host list could cause Exim to panic-die when
4458 the list was checked. (An example that provoked this was putting <; in the
4459 middle of a list instead of at the start.) If this happened during a DATA
4460 ACL check, a -D file could be left lying around. This kind of configuration
4461 error no longer causes Exim to die; instead it causes a defer errror. The
4462 incident is still logged to the main and panic logs.
4464 74. Buglet left over from Exim 3 conversion. The message "too many messages
4465 in one connection" was written to the rejectlog but not the mainlog, except
4466 when address rewriting (yes!) was being logged.
4468 75. Added write_rejectlog option.
4470 76. When a system filter was run not as root (that is, when system_filter_user
4471 was set), the values of the $n variables were not being returned to the
4472 main process; thus, they were not subsequently available in the $sn
4475 77. Added +return_path_on_delivery log selector.
4477 78. A connection timeout was being treated differently from recipients deferred
4478 when testing hosts_max_try with a message that was older than the host's
4479 retry timeout. (The host should not be counted, thus allowing all hosts to
4480 be tried at least once before bouncing.) This may have been the cause of an
4481 occasionally reported bug whereby a message would remain on the queue
4482 longer than the retry timeout, but would be bounced if a delivery was
4483 forced. I say "may" because I never totally pinned down the problem;
4484 setting up timeout/retry tests is difficult. See also the next item.
4486 79. The ultimate address timeout was not being applied to errors that involved
4487 a combination of host plus message (for example, a timeout on a MAIL
4488 command). When an address resolved to a number of possible hosts, and they
4489 were not all tried for each delivery (e.g. because of hosts_max_try), a
4490 message could remain on the queue longer than the retry timeout.
4492 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4495 81. Fixed an obscure SMTP outgoing bug which required at least the following
4496 conditions: (a) there was another message waiting for the same server;
4497 (b) the server returned 5xx to all RCPT commands in the first message so
4498 that the message was not completed; (c) the server dropped the connection
4499 or gave a negative response to the RSET that Exim sends to abort the
4500 transaction. The observed case was a dropped connection after DATA that had
4501 been sent in pipelining mode. That is, the server had advertised PIPELINING
4502 but was not implementing it correctly. The effect of the bug was incorrect
4503 behaviour, such as trying another host, and this could lead to a crash.
4509 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4510 and daemon.c were passed as pointers to ints; they should have been
4511 pointers to socklen_t variables (which are typically unsigned ints).
4513 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4516 3. Fixed a really odd bug that affected only the testing scheme; patching a
4517 certain fixed string in the binary changed the value of another string that
4518 happened to be identical to the end of the original first string.
4520 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4521 name", it returns that address as the IP address. On some operating
4522 systems (e.g. Solaris), it also passes back the IP address string as the
4523 "host name". However, on others (e.g. Linux), it passes back an empty
4524 string. Exim wasn't checking for this, and was changing the host name to an
4525 empty string, assuming it had been canonicized.
4527 5. Although rare, it is permitted to have more than one PTR record for a given
4528 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4529 all the names associated with an address, because they do in Solaris.
4530 However, it seems that they do not in Linux for data that comes from the
4531 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4532 I found this out when I moved to a new Linux workstation and tried to run
4533 the Exim test suite.
4535 To get round this problem I have changed the code so that it now does its
4536 own call to the DNS to look up PTR records when searching for a host name.
4537 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4538 addresses that are only in /etc/hosts are still found.
4540 This behaviour is, however, controlled by an option called host_lookup_
4541 order, which defaults to "bydns:byaddr". If people want to use the other
4542 order, or indeed, just use one or the other means of lookup, they can
4543 specify it in this variable.
4545 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4546 some operating systems, this comes back from gethostbyaddr() as an empty
4547 string, and this is what Exim used to test for. However, it seems that in
4548 other systems, "." is yielded. Exim now tests for this case too.
4550 7. The values of check_spool_space and check_log_space are now held internally
4551 as a number of kilobytes instead of an absolute number of bytes. If a
4552 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4553 kilobyte. This means that much larger values can be stored.
4555 8. Exim monitor: an attempt to get the action menu when not actually pointing
4556 at a message produces an empty menu entitled "No message selected". This
4557 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4558 no entries in it ("Shell widget menu has zero width and/or height"). So I
4559 have added a single, blank menu entry in this case.
4561 9. Added ${quote_local_part.
4563 10. MIME decoding is now applied to the contents of Subject: header lines when
4566 11. Now that a reference to $sender_host_address automatically causes a reverse
4567 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4568 host lookup before query-style lookups in lists that might use this
4569 variable. This has therefore been abolished, and the "net-" prefix is no
4570 longer necessary for query-style lookups.
4572 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4573 have been a typo for LFLAGS, so it has been changed.
4575 13. The install script calls Exim with "-C /dev/null" in order to find the
4576 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4577 to be output. Howeve, since Exim outputs its version number before the
4578 error, it didn't break the script. It just looked ugly. I fixed this by
4579 always allowing "-C /dev/null" if the caller is root.
4581 14. Ignore overlarge ACL variable number when reading spool file - insurance
4582 against a later release with more variables having written the file.
4584 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4585 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4586 this, as well as the form without the "IPv6" on the front.
4588 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4589 OS/Makefile-Darwin file.
4591 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4592 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4594 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4595 variable. However, some OS use ints for inodes. I've added cast to long int
4596 to get rid of the compiler warning.
4598 19. I had forgotten to lock out "/../" in configuration file names when
4599 ALT_CONFIG_PREFIX was set.
4601 20. Routers used for verification do not need to specify transports. However,
4602 if such a router generated a host list, and callout was configured, Exim
4603 crashed, because it could not find a port number from the (non-existent)
4604 transport. It now assumes port 25 in this circumstance.
4606 21. Added the -t option to exigrep.
4608 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4609 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4610 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4611 them is set, LOOKUP_LSEARCH is forced.
4613 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4615 24. Added sender and host information to the "rejected by local_scan()" log
4616 line; previously there was no indication of these.
4618 25. Added .include_if_exists.
4620 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4621 Linux. It turns out that not all file systems support this. Apparently some
4622 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4623 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4624 not supported on the file descriptor, is now ignored when Exim is trying to
4625 sync a directory. This applies only to Linux.
4627 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4629 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4630 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4633 29. Added support for maildirsize files from supplied patch (modified a bit).
4635 30. The use of :fail: followed by an empty string could lead Exim to respond to
4636 sender verification failures with (e.g.):
4638 550 Verification failed for <xxx>
4639 550 Sender verify failed
4641 where the first response line was missing the '-' that indicates it is not
4642 the final line of the response.
4644 31. The loop for finding the name of the user that called Exim had a hardwired
4645 limit of 10; it now uses the value of finduser_retries, which is used for
4646 all other user lookups.
4648 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4651 33. Exim was neglecting to zero errno before one call of strtol() when
4652 expanding a string and expecting an integer value. On some systems this
4653 resulted in spurious "integer overflow" errors. Also, it was casting the
4654 result into an int without checking.
4656 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4657 did not work. The code looks as if it has *never* worked, though it appears
4658 to have been documented since at least releast 1.62. I have made it work.
4660 35. The "timeout_DNS" error in retry rules, also documented since at least
4661 1.62, also never worked. As it isn't clear exactly what this means, and
4662 clearly it isn't a major issue, I have abolished the feature by treating it
4663 as "timeout", and writing a warning to the main and panic logs.
4665 36. The display of retry rules for -brt wasn't always showing the error code
4668 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4669 timeout_connect_A, timeout_connect_MX.
4671 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4672 to the empty sender.
4674 39. The daemon was not analysing the content of -oX till after it had closed
4675 stderr and disconnected from the controlling terminal. This meant that any
4676 syntax errors were only noted on the panic log, and the return code from
4677 the command was 0. By re-arranging the code a little, I've made the
4678 decoding happen first, so such errors now appear on stderr, and the return
4679 code is 1. However, the actual setting up of the sockets still happens in
4680 the disconnected process, so errors there are still only recorded on the
4683 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4684 connections (as happens on some IP stacks) was logged at start up time as
4685 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4686 it from "IPv6 and IPv4", which means that two separate sockets are being
4689 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4690 says whether AF_INET or AF_INET6 was passed as an argument.
4692 42. Exiwhat output was messed up when time zones were included in log
4695 43. Exiwhat now gives more information about the daemon's listening ports,
4696 and whether -tls-on-connect was used.
4698 44. The "port" option of the smtp transport is now expanded.
4700 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4701 silently ignored. Now an error message is written to the main and panic
4704 46. There's a new ACL modifier called "logwrite" which writes to a log file
4705 as soon as it is encountered.
4707 47. Added $local_user_uid and $local_user_gid at routing time.
4709 48. Exim crashed when trying to verify a sender address that was being
4712 49. Exim was recognizing only a space character after ".include". It now also
4713 recognizes a tab character.
4715 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4716 extracting the relevant information from the specification. The man page no
4717 longer contains scrambled data for the -d option, and I've added a section
4718 at the front about calling Exim under different names.
4720 51. Added "extra_headers" argument to the "mail" command in filter files.
4722 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4725 53. Installed eximstats 1.29.
4727 54. Added transport_filter_timeout as a generic transport option.
4729 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4730 Cc: header lines. This was required by RFC 822, but it not required by RFC
4733 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4734 incoming messages that did not have them. Now it does so only if the
4735 message originates locally, that is, if there is no associated remote host
4736 address. When Resent- header lines are present, this applies to the Resent-
4737 lines rather than the non-Resent- lines.
4739 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4740 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4742 58. Messages for configuration errors now include the name of the main
4743 configuration file - useful now that there may be more than one file in a
4744 list (.included file names were always shown).
4746 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4747 for those rare installations that do not start the daemon as root or run it
4748 setuid root. I've cut out the call to initgroups() if the daemon is not
4751 60. The Exim user and group can now be bound into the binary as text strings
4752 that are looked up at the start of Exim's processing.
4754 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4756 62. Added $mailstore_basename variable.
4758 63. Installed patch to sieve.c from Michael Haardt.
4760 64. When Exim failed to open the panic log after failing to open the main log,
4761 the original message it was trying to log was written to stderr and debug
4762 output, but if they were not available (the usual case in production), it
4763 was lost. Now it is written to syslog before the two lines that record the
4764 failures to open the logs.
4766 65. Users' Exim filters run in subprocesses under the user's uid. It is
4767 possible for a "deliver" command or an alias in a "personal" command to
4768 provoke an address rewrite. If logging of address rewriting is configured,
4769 this fails because the process is not running as root or exim. There may be
4770 a better way of dealing with this, but for the moment (because 4.30 needs
4771 to be released), I have disabled address rewrite logging when running a
4772 filter in a non-root, non-exim process.
4778 1. The buildconfig auxiliary program wasn't quoting the value set for
4779 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4780 not defined. This bug was masked in 4.22 by the effect that was fixed in
4783 2. Some messages that were rejected after a message id was allocated were
4784 shown as "incomplete" by exigrep. It no longer does this for messages that
4785 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4787 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4788 have allow_domain_literals set, the ID did not get logged in the <= line.
4789 Domain literals are now always recognized in Message-ID: header lines.
4791 4. The first argument for a ${extract expansion item is the key name or field
4792 number. Leading and trailing spaces in this item were not being ignored,
4793 causing some misleading effects.
4795 5. When deliver_drop_privilege was set, single queue runner processes started
4796 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4797 same command in the process it spins off) were not dropping privilege.
4799 6. When the daemon running as "exim" started a queue runner, it always
4800 re-executed Exim in the spun-off process. This is a waste of effort when
4801 deliver_drop_privilege is set. The new process now just calls the
4802 queue-runner function directly.
4808 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4811 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4812 ignored. Though the use of -oP was forcing the writing of a pid file, it
4813 was always written to the default place.
4815 3. If the message "no IP address found for host xxxx" is generated during
4816 incoming verification, it is now followed by identification of the incoming
4817 connection (so you can more easily find what provoked it).
4819 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4821 5. Added some features to "harden" Exim a bit more against certain attacks:
4823 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4824 be put in Local/Makefile. This is like the never_users runtime option,
4825 but it cannot be overridden. The default setting is "root".
4827 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4828 prefix string with which any file named in a -C command line option
4831 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4832 is retained for -C and -D only if the caller of Exim is root. Without
4833 it, the exim user may also use -C and -D and retain privilege.
4835 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4836 command line option is disabled.
4838 6. Macro names set by the -D option must start with an upper case letter, just
4839 like macro names defined in the configuration file.
4841 7. Added "dereference=" facility to LDAP.
4843 8. Two instances of the typo "uknown" in the source files are fixed.
4845 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4846 the Configure-Makefile script screwed up while processing it.
4848 10. Incorporated PCRE 4.4.
4850 11. The SMTP synchronization check was not operating right at the start of an
4851 SMTP session. For example, it could not catch a HELO sent before the client
4852 waited for the greeting. There is now a check for outstanding input at the
4853 point when the greeting is written. Because of the duplex, asynchronous
4854 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4855 way, but not yet received, when the check is performed.
4857 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4858 on TCP/IP sockets, because this apparently causes some broken clients to
4861 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4862 unchanged) from the Cygwin maintainer.
4864 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4865 was supported instead of testing for mbx. Effectively a typo.
4867 15. The spa authenticator server code was not checking that the input it
4868 received was valid base64.
4870 16. The debug output line for the "set" modifier in ACLs was not showing the
4871 name of the variable that was being set.
4873 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4875 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4876 lookup on its own. Something else was needed to trigger the lookup. For
4877 example, a match in host_lookup or the need for a host name in a host list.
4878 Now, if $sender_host_name is referenced and the host name has not yet been
4879 looked up, a lookup is performed. If the lookup fails, the variable remains
4880 empty, and $host_lookup_failed is set to "1".
4882 19. Added "eqi" as a case-independent comparison operator.
4884 20. The saslauthd authentication condition could segfault if neither service
4885 nor realm was specified.
4887 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4888 error message that was logged was misleading, and incoming SMTP
4889 connections were dropped. The message is now more accurate, and temporary
4890 errors are given to SMTP connections.
4892 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4893 (except RSET) with a 421 error, until QUIT is received. However, it was
4894 failing to send a response to QUIT.
4896 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4897 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4898 ACL is now run after the helo_try_verify_hosts code.
4900 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4901 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4902 case-independent, so other case variants are also recognized). Apparently
4903 some systems use these upper case variants.
4905 25. If more than two messages were waiting for the same host, and a transport
4906 filter was specified for the transport, Exim sent two messages over the
4907 same TCP/IP connection, and then failed with "socket operation on non-
4908 socket" when it tried to send the third.
4910 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4912 27. The extern definition of crypt16() in expand.c was not being excluded when
4913 the OS had its own crypt16() function.
4915 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4916 as a preferred synonym for return_size_limit, both as an option and as an
4919 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4921 30. Changed the default configuration ACL to relax the local part checking rule
4922 for addresses that are not in any local domains. For these addresses,
4923 slashes and pipe symbols are allowed within local parts, but the sequence
4924 /../ is explicitly forbidden.
4926 31. SPA server authentication was not clearing the challenge buffer before
4929 32. log_message in a "warn" ACL statement was writing to the reject log as
4930 well as to the main log, which contradicts the documentation and doesn't
4931 seem right (because no rejection is happening). So I have stopped it.
4933 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4934 However, I am unable to do any testing of this.
4936 34. Fixed an infelicity in the appendfile transport. When checking directories
4937 for a mailbox, to see if any needed to be created, it was accidentally
4938 using path names with one or more superfluous leading slashes; tracing
4939 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4941 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4942 contents are added to the log line that is written for every discarded
4943 recipient. (Previously a log_message setting was ignored.)
4945 36. The ${quote: operator now quotes the string if it is empty.
4947 37. The install script runs exim in order to find its version number. If for
4948 some reason other than non-existence or emptiness, which it checks, it
4949 could not run './exim', it was installing it with an empty version number,
4950 i.e. as "exim-". This error state is now caught, and the installation is
4953 38. An argument was missing from the function that creates an error message
4954 when Exim fails to connect to the socket for saslauthd authentication.
4955 This could cause Exim to crash, or give a corrupted message.
4957 39. Added isip, isip4, and isip6 to ${if conditions.
4959 40. The ACL variables $acl_xx are now saved with the message, and can be
4960 accessed later in routers, transports, and filters.
4962 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4963 strings in the file are not string-expanded.
4965 42. If a MAIL command specified a SIZE value that was too large to fit into an
4966 int variable, the check against message_size_limit failed. Such values are
4967 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4968 day this will have to be increased, but I don't think I want to be around
4969 when emails are that large.
4976 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4977 iconv() is not standard in FreeBSD.
4979 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4980 IPv6 enabled. The observed symptom was a segmentation fault on return from
4981 the function os_common_find_running_interfaces() in src/os.c.
4983 3. In the check_special_case() function in daemon.c I had used "errno" as an
4984 argument name, which causes warnings on some systems. This was basically a
4985 typo, since it was named "eno" in the comments!
4987 4. The code that waits for the clock to tick (at a resolution of some fraction
4988 of a second) so as to ensure message-id uniqueness was always waiting for
4989 at least one whole tick, when it could have waited for less. [This is
4990 almost certainly not relevant at current processor speeds, where it is
4991 unlikely to ever wait at all. But we try to future-proof.]
4993 5. The function that sleeps for a time interval that includes fractions of a
4994 second contained a race. It did not block SIGALRM between setting the
4995 timer, and suspending (a couple of lines later). If the interval was short
4996 and the sigsuspend() was delayed until after it had expired, the suspension
4997 never ended. On busy systems this could lead to processes getting stuck for
5000 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5001 process, before it forks any delivery processes. The open lookup caching
5002 mechanism meant that the open file or database connection was passed into
5003 the delivery process. The problem was that delivery processes always tidy
5004 up cached lookup data. This could cause a problem for the next delivery
5005 process started by the queue runner, because the external queue runner
5006 process does not know about the closure. So the next delivery process
5007 still has data in the lookup cache. In the case of a file lookup, there was
5008 no problem because closing a file descriptor in a subprocess doesn't affect
5009 the parent. However, if the lookup was caching a connection to a database,
5010 the connection was closed, and the second delivery process was likely to
5011 see errors such as "PGSQL: query failed: server closed the connection
5012 unexpectedly". The problem has been fixed by closing all cached lookups
5013 in a queue runner before running a delivery process.
5015 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5016 seem to have the "const" qualifier which it has on other OS. I've
5019 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5020 *of the same type* (client or server) with the same public name that an
5021 error should be diagnosed.
5023 9. When Exim looked up a host name for an IP address, but failed to find the
5024 original IP address when looking up the host name (a safety check), it
5025 output the message "<ip address> does not match any IP for NULL", which was
5026 confusing, to say the least. The bug was that the host name should have
5027 appeared instead of "NULL".
5029 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5030 user that is built into the binary, and the -C or -D options is used, root
5031 privilege is dropped before the configuration file is read. In addition,
5032 logging is switched to stderr instead of the normal log files. If the
5033 configuration then re-defines the Exim user, the unprivileged environment
5034 is probably not what is expected, so Exim logs a panic warning message (but
5037 However, if deliver_drop_privilege is set, the unprivileged state may well
5038 be exactly what is intended, so the warning has been cut out in that case,
5039 and Exim is allowed to try to write to its normal log files.
5045 1. smtp_return_error_details was not giving details for temporary sender
5046 or receiver verification errors.
5048 2. Diagnose a configuration error if two authenticators have the same public
5051 3. Exim used not to create the message log file for a message until the first
5052 delivery attempt. This could be confusing when incoming messages were held
5053 for policy or load reasons. The message log file is now created at the time
5054 the message is received, and an initial "Received" line is written to it.
5056 4. The automatically generated man page for command line options had a minor
5057 bug that caused no ill effects; however, a more serious problem was that
5058 the procedure for building the man page automatically didn't always
5059 operate. Consequently, release 4.20 contains an out-of-date version. This
5060 shouldn't happen again.
5062 5. When building Exim with embedded Perl support, the script that builds the
5063 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5064 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5066 6. The freeze_tell option was not being used for messages that were frozen on
5067 arrival, either by an ACL or by local_scan().
5069 7. Added the smtp_incomplete_transaction log selector.
5071 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5072 was accepting AUTH without a new EHLO.
5074 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5075 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5078 10. Logging of TCP/IP connections (when configured) now happens in the main
5079 daemon process instead of the child process, so that the TCP/IP connection
5080 count is more accurate (but it can never be perfect).
5082 11. The use of "drop" in a nested ACL was not being handled correctly in the
5083 outer ACL. Now, if condition failure induced by the nested "drop" causes
5084 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5085 or "require"), the connection is dropped.
5087 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5088 that yield "discard" can now be used with an "accept" or a "discard" verb,
5089 but an error is generated for any others (because I can't see a useful way
5090 to define what should happen).
5092 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5093 are now processed in the same way as lines in the Exim configuration file.
5094 In particular, continuation lines are supported.
5096 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5098 15. Added -ti meaning -t -i.
5100 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5101 domains, and warn by logging if others are found.
5103 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5104 returned from GIFCONF when Exim is trying to find the list of interfaces on
5105 a host. The code in os.c has been modified to copy each ifreq to an aligned
5106 structure in all cases.
5108 Also, in some cases, the returned ifreq's were being copied to a 'struct
5109 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5110 means the last couple of bytes of an IPv6 address could be chopped if the
5111 ifreq contained only a normal sockaddr (14 bytes storage).
5113 18. Named domain lists were not supported in the hosts_treat_as_local option.
5114 An entry such as +xxxx was not recognized, and was treated as a literal
5117 19. Ensure that header lines added by a DATA ACL are included in the reject log
5118 if the ACL subsequently rejects the message.
5120 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5121 MD5 (which is deprecated).
5123 21. When testing a filter file using -bf, Exim was writing a message when it
5124 took the sender from a "From " line in the message, but it was not doing so
5125 when it took $return_path from a Return-Path: header line. It now does.
5127 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5128 with a valid header line field name (a series of printing characters
5129 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5131 23. Changed "disc" in the source to "disk" to conform to the documentation and
5132 the book and for uniformity.
5134 24. Ignore Sendmail's -Ooption=value command line item.
5136 25. When execve() failed while trying to run a command in a pipe transport,
5137 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5138 could be confused with a return value of 69 from the command itself. This
5139 has been changed to 127, the value the shell returns if it is asked to run
5140 a non-existent command. The wording for the related log line suggests a
5141 non-existent command as the problem.
5143 26. If received_header_text expands to an empty string, do not add a Received:
5144 header line to the message. (Well, it adds a token one on the spool, but
5145 marks it "old" so that it doesn't get used or transmitted.)
5147 27. Installed eximstats 1.28 (addition of -nt option).
5149 28. There was no check for failure on the call to getsockname() in the daemon
5150 code. This can fail if there is a shortage of resources on the system, with
5151 ENOMEM, for example. A temporary error is now given on failure.
5153 29. Contrary to the C standard, it seems that in some environments, the
5154 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5155 program. Exim now does this explicitly; it affects the formatting of
5156 timestamps using strftime().
5158 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5159 complaints. I've now initialized all the variables, to avoid this.
5161 32. Header lines added by a system filter were not being "seen" during
5162 transport-time rewrites.
5164 33. The info_callback() function passed to OpenSSL is set up with type void
5165 (*)(SSL *, int, int), as described somewhere. However, when calling the
5166 function (actually a macro) that sets it up, the type void(*)() is
5167 expected. I've put in a cast to prevent warnings from picky compilers.
5169 34. If a DNS black list lookup found a CNAME record, but there were no A
5170 records associated with the domain it pointed at, Exim crashed.
5172 35. If a DNS black list lookup returned more than one A record, Exim ignored
5173 all but the first. It now scans all returned addresses if a particular IP
5174 value is being sought. In this situation, the contents of the
5175 $dnslist_value variable are a list of all the addresses, separated by a
5178 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5179 to accept a host name and all its aliases if the forward lookup for any of
5180 them yielded the IP address of the incoming connection. Now it accepts only
5181 those names whose forward lookup yields the correct IP address. Any other
5182 names are discarded. This closes a loophole whereby a rogue DNS
5183 administrator could create reverse DNS records to break through a
5184 wildcarded host restriction in an ACL.
5186 37. If a user filter or a system filter that ran in a subprocess used any of
5187 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5188 the wrong values were passed to the pipe command ($thisaddress had the
5189 value of $0, $0 had the value of $1, etc). This bug was introduced by
5190 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5192 38. Improved the line breaking for long SMTP error messages from ACLs.
5193 Previously, if there was no break point between 40 and 75 characters, Exim
5194 left the rest of the message alone. Two changes have been made: (a) I've
5195 reduced the minimum length to 35 characters; (b) if it can't find a break
5196 point between 35 and 75 characters, it looks ahead and uses the first one
5197 that it finds. This may give the occasional overlong line, but at least the
5198 remaining text gets split now.
5200 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5201 file descriptors might be low, and that setting 1000 would always raise it.
5202 It turns out that in some environments, the limit is already over 1000 and
5203 that lowering it causes trouble. So now Exim takes care not to decrease it.
5205 40. When delivering a message, the value of $return_path is set to $sender_
5206 address at the start of routing (routers may change the value). By an
5207 oversight, this default was not being set up when an address was tested by
5208 -bt or -bv, which affected the outcome if any router or filter referred to
5211 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5212 log only when "message" or "log_message" are set. However, if one of the
5213 conditions was an address verification, or a call to a nested ACL, the
5214 messages generated by the underlying test were being passed through. This
5215 no longer happens. The underlying message is available in $acl_verify_
5216 message for both "message" and "log_message" expansions, so it can be
5217 passed through if needed.
5219 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5220 new expansion $bh_ to give the encoded byte string without charset
5221 translation. Translation happens only if iconv() is available; HAVE_ICONV
5222 indicates this at build time. HEADERS_CHARSET gives the charset to
5223 translate to; headers_charset can change it in the configuration, and
5224 "headers charset" can change it in an individual filter file.
5226 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5227 that creates RFC 2047 encoded "words" labels them as that charset instead
5228 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5229 expansion operator; (ii) when Exim creates a From: line for a local
5230 message; (iii) when a header line is rewritten to include a "phrase" part.
5232 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5233 buggy, causing it to skip the first lines of messages whose message ID
5234 ended in 'D'. This would not have bitten before Exim release 4.14, because
5235 message IDs were unlikely to end in 'D' before then. The effect was to have
5236 incorrect size information for certain domains.
5238 45. #include "config.h" was missing at the start of the crypt16.c module. This
5239 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5242 46. If there was a timeout during a "random" callout check, Exim treated it as
5243 a failure of the random address, and carried on sending RSET and the real
5244 address. If the delay was just some slowness somewhere, the response to the
5245 original RCPT would be taken as a response to RSET and so on, causing
5246 mayhem of various kinds.
5248 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5249 when I implemented it. It didn't allow for the fact that some option values
5250 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5251 the right test for positive values.
5253 48. Domain names in DNS records are case-independent. Exim always looks them up
5254 in lower case. Some resolvers return domain names in exactly the case they
5255 appear in the zone file, that is, they may contain uppercase letters. Not
5256 all resolvers do this - some return always lower case. Exim was treating a
5257 change of case by a resolver as a change of domain, similar to a widening
5258 of a domain abbreviation. This triggered its re-routing code and so it was
5259 trying to route what was effectively the same domain again. This normally
5260 caused routing to fail (because the router wouldn't handle the domain
5261 twice). Now Exim checks for this case specially, and just changes the
5262 casing of the domain that it ultimately uses when it transmits the message
5265 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5268 50. If a filter generated a file delivery with a non-absolute name (possible if
5269 no home directory exists for the router), the forbid_file option was not
5272 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5273 the existing equality matching.
5275 52. Exim was using ints instead of ino_t variables in some places where it was
5276 dealing with inode numbers.
5278 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5279 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5280 called TMPDIR, and if it finds it is different, it changes its value.
5282 54. The smtp_printf() function is now made available to local_scan() so
5283 additional output lines can be written before returning. There is also an
5284 smtp_fflush() function to enable the detection of a dropped connection.
5285 The variables smtp_input and smtp_batched_input are exported to
5288 55. Changed the default runtime configuration: the message "Unknown user"
5289 has been removed from the ACL, and instead placed on the localuser router,
5290 using the cannot_route_message feature. This means that any verification
5291 failures that generate their own messages won't get overridden. Similarly,
5292 the "Unrouteable address" message that was in the ACL for unverifiable
5293 relay addresses has also been removed.
5295 56. Added hosts_avoid_esmtp to the smtp transport.
5297 57. The exicyclog script was not checking for the esoteric option
5298 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5299 will work only if exicyclog is run under the appropriate euid.
5301 58. Following a discussion on the list, the rules by which Exim recognises line
5302 endings on incoming messages have been changed. The -dropcr and drop_cr
5303 options are now no-ops, retained only for backwards compatibility. The
5304 following line terminators are recognized: LF CRLF CR. However, special
5305 processing applies to CR:
5307 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5308 nor a local message in the state where . is a terminator.
5310 (ii) If a bare CR is encountered in a header line, an extra space is added
5311 after the line terminator so as not to end the header. The reasoning
5312 behind this is that bare CRs in header lines are most likely either
5313 to be mistakes, or people trying to play silly games.
5315 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5316 was being incorrectly given as 18 bytes larger than it should have been.
5317 This is a VOB (very old bug).
5319 60. This may never have affected anything current, but just in case it has:
5320 When the local host is found other than at the start of a list of hosts,
5321 the local host, those with the same MX, and any that follow, are discarded.
5322 When the list in question was part of a longer list of hosts, the following
5323 hosts (not currently being processed) were also being discarded. This no
5324 longer happens. I'm not sure if this situation could ever has previously
5327 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5330 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5331 header. This is something that is recommended in a new Internet Draft, and
5332 is something that is documented as being done by Sendmail. There are two
5333 possible values. For messages generated by the autoreply transport, Exim
5336 Auto-Submitted: auto-replied
5338 whereas for all other generated messages (e.g. bounces) it adds
5340 Auto-Submitted: auto-generated
5342 63. The "personal" condition in filters now includes a test for the
5343 Auto-Submitted: header. If it contains the string "auto-" the message it
5344 not considered personal.
5346 64. Added rcpt_include_affixes as a generic transport option.
5348 65. Added queue_only_override (default true).
5350 66. Added the syslog_duplication option.
5352 67. If what should have been the first header line of a message consisted of
5353 a space followed by a colon, Exim was mis-interpreting it as a header line.
5354 It isn't of course - it is syntactically invalid and should therefore be
5355 treated as the start of the message body. The misbehaviour could have
5356 caused a number of strange effects, including loss of data in subsequent
5357 header lines, and spool format errors.
5359 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5360 client host had authenticated. This control can now be exercised by an ACL
5361 for more flexibility.
5363 69. By default, callouts do not happen when testing with -bh. There is now a
5364 variant, -bhc, which does actually run the callout code, including
5365 consulting and updating the callout cache.
5367 70. Added support for saslauthd authentication, courtesy of Alexander
5370 71. If statvfs() failed on the spool or log directories while checking their
5371 size for availability, Exim confusingly gave the error "space shortage".
5372 Furthermore, in debugging mode it crashed with a floating point exception.
5373 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5374 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5375 serious problem, Exim now writes to the main and panic logs when this
5376 happens, with details of the failure. It then refuses to accept the
5377 incoming message, giving the message "spool directory problem" or "log
5378 directory problem" with a 421 code for SMTP messages.
5380 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5381 0, 1, and 2 exist, because some OS complain for execs without them (see
5382 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5383 descriptors. However, the code omitted to check that the open succeeded,
5384 causing mysterious errors if for some reason the permissions on /dev/null
5385 got screwed. Now Exim writes a message to the main and panic logs, and
5386 bombs out if it can't open /dev/null.
5388 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5389 interact so that it is all more flexible. It is supposed to remain
5390 backwards compatible. Also added extra_local_interfaces.
5392 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5393 to bomb out with an assertion failure - to the client this appears as a
5394 connection drop. This problem occurs in the part of the code that was taken
5395 from the Samba project. Fortunately, the assertion is in a very simple
5396 function, so I have fixed this by reproducing the function inline in the
5397 one place where it is called, and arranging for authentication to fail
5398 instead of killing the process with assert().
5400 75. The SPA client code was not working when the server requested OEM rather
5401 than Unicode encoding.
5403 76. Added code to make require_files with a specific uid setting more usable in
5404 the case where statting the file as root fails - usually a non-root-mounted
5405 NFS file system. When this happens and the failure is EACCES, Exim now
5406 forks a subprocess and does the per-uid checking as the relevant uid.
5408 77. Added process_log_path.
5410 78. If log_file_path was not explicitly set, a setting of check_log_space or
5411 check_log_inodes was ignored.
5413 79. If a space check for the spool or log partitions fails, the incident is now
5414 logged. Of course, in the latter case the data may get lost...
5416 80. Added the %p formatting code to string_format() so that it can be used to
5417 print addresses in debug_print(). Adjusted all the address printing in the
5418 debugging in store.c to use %p rather than %d.
5420 81. There was a concern that a line of code in smtp_in.c could overflow a
5421 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5422 initially expressed, the concern was not well-founded, because trailing
5423 spaces are removed early. However, if the trailing spaces were followed by
5424 a NULL, they did not get removed, so the overflow was possible. Two fixes
5427 (a) I re-wrote the offending code in a cleaner fashion.
5428 (b) If an incoming SMTP command contains a NULL character, it is rejected
5431 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5432 runs initgroups(), so that if the Exim user is in any additional groups,
5433 they will be used during message reception.
5439 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob