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 TF/01 Failure to get a lock on a hints database can have serious
10 consequences so log it to the panic log.
12 TF/02 Log LMTP confirmation messages in the same way as SMTP,
13 controlled using the smtp_confirmation log selector.
15 TF/03 Include the error message when we fail to unlink a spool file.
17 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
18 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
19 for maintaining out-of-tree patches for some time.
21 PP/01 Bugzilla 139: Documentation and portability issues.
22 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
23 Handle per-OS dynamic-module compilation flags.
29 PP/01 Date: & Message-Id: revert to normally being appended to a message,
30 only prepend for the Resent-* case. Fixes regression introduced in
31 Exim 4.70 by NM/22 for Bugzilla 607.
33 PP/02 Include check_rfc2047_length in configure.default because we're seeing
34 increasing numbers of administrators be bitten by this.
36 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
38 PP/03 Bugzilla 994: added openssl_options main configuration option.
40 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
42 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
44 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
46 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
47 without a peer certificate, leading to a segfault because of an
48 assumption that peers always have certificates. Be a little more
49 paranoid. Problem reported by Martin Tscholak.
51 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
52 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
53 NB: ClamAV planning to remove STREAM in "middle of 2010".
54 CL also introduces -bmalware, various -d+acl logging additions and
55 more caution in buffer sizes.
57 PP/09 Implemented reverse_ip expansion operator.
59 PP/10 Bugzilla 937: provide a "debug" ACL control.
61 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
63 PP/12 Bugzilla 973: Implement --version.
65 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
67 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
69 PP/15 Bugzilla 816: support multiple condition rules on Routers.
71 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
72 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
73 ignore trailing whitespace.
75 JJ/02 prevent non-panic DKIM error from being sent to paniclog
77 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
80 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
81 Notification from Dr Andrew Aitchison.
83 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
84 ExtendedDetectionInfo response format.
85 Notification from John Horne.
87 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
90 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
91 XSL and documented dependency on system catalogs, with examples of how
94 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
97 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
98 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
99 configuration file which is writeable by the Exim user or group.
101 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
102 of configuration files to cover files specified with the -C option if
103 they are going to be used with root privileges, not just the default
106 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
107 option (effectively making it always true).
109 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
110 files to be used while preserving root privileges.
112 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
113 that rogue child processes cannot use them.
115 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
116 run-time user, instead of root.
118 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
119 Exim run-time user without dropping privileges.
121 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
122 result string, instead of calling string_vformat() twice with the same
125 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
126 for other users. Others should always drop root privileges if they use
127 -C on the command line, even for a whitelisted configure file.
129 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
131 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
137 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
138 $data_path, and $header_path variables; fixed documentation bugs and
141 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
142 exipick to access non-standard spools, including the "frozen" queue
145 NM/01 Bugzilla 965: Support mysql stored procedures.
146 Patch from Alain Williams
148 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
150 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
151 Patch from Andreas Metzler
153 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
154 Patch from Kirill Miazine
156 NM/05 Bugzilla 671: Added umask to procmail example.
158 JJ/03 installed exipick 20100323.0, fixing doc bug
160 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
161 directory. Notification and patch from Dan Rosenberg.
163 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
165 TK/02 Improve log output when DKIM signing operation fails.
167 MH/01 Treat the transport option dkim_domain as a colon separated
168 list, not as a single string, and sign the message with each element,
169 omitting multiple occurences of the same signer.
171 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
172 Bugzilla 985, 986. Patch by Simon Arlott
174 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
175 Patch by Simon Arlott
177 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
178 MBX locking. Notification from Dan Rosenberg.
184 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
186 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
188 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
190 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
192 NM/04 Bugzilla 915: Flag broken perl installation during build.
198 TK/01 Added patch by Johannes Berg that expands the main option
199 "spamd_address" if it starts with a dollar sign.
201 TK/02 Write list of recipients to X-Envelope-Sender header when building
202 the mbox-format spool file for content scanning (suggested by Jakob
205 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
206 (http://www.dcc-servers.net/) support via dccifd. Activated by
207 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
209 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
210 by Mark Daniel Reidel <mr@df.eu>.
212 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
213 When building exim an external PCRE library is now needed -
214 PCRE is a system library on the majority of modern systems.
215 See entry on PCRE_LIBS in EDITME file.
217 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
218 conversation. Added nologin parameter to request.
219 Patch contributed by Kirill Miazine.
221 TF/01 Do not log submission mode rewrites if they do not change the address.
223 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
225 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
226 log files in place. Contributed by Roberto Lima.
228 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
230 TF/03 Bugzilla 615: When checking the local_parts router precondition
231 after a local_part_suffix or local_part_prefix option, Exim now
232 does not use the address's named list lookup cache, since this
233 contains cached lookups for the whole local part.
235 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
236 Robert Millan. Documentation is in experimental-spec.txt.
238 TF/04 Bugzilla 668: Fix parallel build (make -j).
240 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
242 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
243 Patch provided by Jan Srzednicki.
245 TF/05 Leading white space used to be stripped from $spam_report which
246 wrecked the formatting. Now it is preserved.
248 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
249 that they are available at delivery time.
251 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
253 TF/08 TLS error reporting now respects the incoming_interface and
254 incoming_port log selectors.
256 TF/09 Produce a more useful error message if an SMTP transport's hosts
257 setting expands to an empty string.
259 NM/06 Bugzilla 744: EXPN did not work under TLS.
260 Patch provided by Phil Pennock.
262 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
263 Patch provided by Richard Godbee.
265 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
266 acl_smtp_notquit, added index entry.
268 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
269 Patch provided by Eugene Bujak.
271 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
272 accept(). Patch provided by Maxim Dounin.
274 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
275 Patch provided by Phil Pennock.
277 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
279 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
280 Patch provided by Brad "anomie" Jorsch.
282 NM/14 Bugzilla 622: Added timeout setting to transport filter.
283 Patch provided by Dean Brooks.
285 TK/05 Add native DKIM support (does not depend on external libraries).
287 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
288 Patch provided by Graeme Fowler.
290 NM/16 Bugzilla 851: Documentation example syntax fix.
292 NM/17 Changed NOTICE file to remove references to embedded PCRE.
294 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
297 NM/19 Bugzilla 745: TLS version reporting.
298 Patch provided by Phil Pennock.
300 NM/20 Bugzilla 167: bool: condition support.
301 Patch provided by Phil Pennock.
303 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
304 clients. Patch provided by Phil Pennock.
306 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
307 Patch provided by Brad "anomie" Jorsch.
309 NM/23 Bugzilla 687: Fix misparses in eximstats.
310 Patch provided by Heiko Schlittermann.
312 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
313 Patch provided by Heiko Schlittermann.
315 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
316 plus update to original patch.
318 NM/26 Bugzilla 799: Documentation correction for ratelimit.
320 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
321 Patch provided by David Brownlee.
323 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
325 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
327 NM/30 Bugzilla 888: TLS documentation bugfixes.
329 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
331 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
332 Unlike the original bugzilla I have changed all shell scripts in src tree.
334 NM/33 Bugzilla 898: Transport filter timeout fix.
335 Patch by Todd Rinaldo.
337 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
338 Patch by Serge Demonchaux.
340 NM/35 Bugzilla 39: Base64 decode bug fixes.
341 Patch by Jakob Hirsch.
343 NM/36 Bugzilla 909: Correct connect() call in dcc code.
345 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
347 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
349 NM/39 Bugzilla 911: Fixed MakeLinks build script.
355 TK/01 Add preliminary DKIM support. Currently requires a forked version of
356 ALT-N's libdkim that I have put here:
357 http://duncanthrax.net/exim-experimental/
359 Note to Michael Haardt: I had to rename some vars in sieve.c. They
360 were called 'true' and it seems that C99 defines that as a reserved
361 keyword to be used with 'bool' variable types. That means you could
362 not include C99-style headers which use bools without triggering
363 build errors in sieve.c.
365 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
366 as mailq or other aliases. Changed the --help handling significantly
367 to do whats expected. exim_usage() emits usage/help information.
369 SC/01 Added the -bylocaldomain option to eximstats.
371 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
373 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
375 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
381 PH/01 Another patch from the Sieve maintainer.
383 PH/02 When an IPv6 address is converted to a string for single-key lookup
384 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
385 dots are used instead of colons so that keys in lsearch files need not
386 contain colons. This was done some time before quoting was made available
387 in lsearch files. However, iplsearch files do require colons in IPv6 keys
388 (notated using the quote facility) so as to distinguish them from IPv4
389 keys. This meant that lookups for IP addresses in host lists did not work
390 for iplsearch lookups.
392 This has been fixed by arranging for IPv6 addresses to be expressed with
393 colons if the lookup type is iplsearch. This is not incompatible, because
394 previously such lookups could never work.
396 The situation is now rather anomolous, since one *can* have colons in
397 ordinary lsearch keys. However, making the change in all cases is
398 incompatible and would probably break a number of configurations.
400 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
403 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
404 conversion specification without a maximum field width, thereby enabling
405 a rogue spamd server to cause a buffer overflow. While nobody in their
406 right mind would setup Exim to query an untrusted spamd server, an
407 attacker that gains access to a server running spamd could potentially
408 exploit this vulnerability to run arbitrary code as the Exim user.
410 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
411 $primary_hostname instead of what libspf2 thinks the hosts name is.
413 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
414 a directory entry by the name of the lookup key. Previously, if a
415 symlink pointed to a non-existing file or a file in a directory that
416 Exim lacked permissions to read, a lookup for a key matching that
417 symlink would fail. Now it is enough that a matching directory entry
418 exists, symlink or not. (Bugzilla 503.)
420 PH/03 The body_linecount and body_zerocount variables are now exported in the
423 PH/04 Added the $dnslist_matched variable.
425 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
426 This means they are set thereafter only if the connection becomes
429 PH/06 Added the client_condition to authenticators so that some can be skipped
430 by clients under certain conditions.
432 PH/07 The error message for a badly-placed control=no_multiline_responses left
433 "_responses" off the end of the name.
435 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
437 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
438 (without spaces) instead of just copying the configuration text.
440 PH/10 Added the /noupdate option to the ratelimit ACL condition.
442 PH/11 Added $max_received_linelength.
444 PH/12 Added +ignore_defer and +include_defer to host lists.
446 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
447 way in which PCRE > 7.0 is built.
449 PH/14 Implemented queue_only_load_latch.
451 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
452 MAIL command. The effect was to mangle the value on 64-bit systems.
454 PH/16 Another patch from the Sieve maintainer.
456 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
458 PH/18 If a system quota error occurred while trying to create the file for
459 a maildir delivery, the message "Mailbox is full" was not appended to the
460 bounce if the delivery eventually timed out. Change 4.67/27 below applied
461 only to a quota excession during the actual writing of the file.
463 PH/19 It seems that peer DN values may contain newlines (and other non-printing
464 characters?) which causes problems in log lines. The DN values are now
465 passed through string_printing() before being added to log lines.
467 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
468 and InterBase are left for another time.)
470 PH/21 Added message_body_newlines option.
472 PH/22 Guard against possible overflow in moan_check_errorcopy().
474 PH/23 POSIX allows open() to be a macro; guard against that.
476 PH/24 If the recipient of an error message contained an @ in the local part
477 (suitably quoted, of course), incorrect values were put in $domain and
478 $local_part during the evaluation of errors_copy.
484 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
485 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
488 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
489 issue a MAIL command.
491 PH/02 In an ACL statement such as
493 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
495 if a client was not listed at all, or was listed with a value other than
496 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
497 the condition was not true (as it should be), so access was not denied.
498 The bug was that the ! inversion was incorrectly passed on to the second
499 item. This has been fixed.
501 PH/03 Added additional dnslists conditions == and =& which are different from
502 = and & when the dns lookup returns more than one IP address.
504 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
505 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
507 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
508 FSYNC, which compiles an option called disable_fsync that allows for
509 bypassing fsync(). The documentation is heavily laced with warnings.
511 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
513 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
514 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
515 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
516 including adding "make clean"; (3) Added -fPIC when compiling the test
517 dynamically loaded module, to get rid of a warning.
519 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
520 message fails, move_frozen_messages = true and ignore_bounce_errors_after
521 = 0s. The bug is otherwise harmless.
523 PH/07 There was a bug in the dovecot authenticator such that the value of
524 $auth1 could be overwritten, and so not correctly preserved, after a
525 successful authentication. This usually meant that the value preserved by
526 the server_setid option was incorrect.
528 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
530 PH/09 Installed PCRE release 7.0.
532 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
533 run for batched SMTP input. It is now run at the start of every message
534 in the batch. While fixing this I discovered that the process information
535 (output by running exiwhat) was not always getting set for -bs and -bS
536 input. This is fixed, and it now also says "batched" for BSMTP.
538 PH/11 Added control=no_pipelining.
540 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
541 patch, slightly modified), and move the expansion of helo_data till after
542 the connection is made in the smtp transport (so it can use these
545 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
547 PH/14 Added log_selector = +pid.
549 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
551 PH/16 Add ${if forany and ${if forall.
553 PH/17 Added dsn_from option to vary the From: line in DSNs.
555 PH/18 Flush SMTP output before performing a callout, unless control =
556 no_callout_flush is set.
558 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
559 was true (the default) a successful delivery failed to delete the retry
560 item, thus causing premature timeout of the address. The bug is now
563 PH/20 Added hosts_avoid_pipelining to the smtp transport.
565 PH/21 Long custom messages for fakedefer and fakereject are now split up
566 into multiline reponses in the same way that messages for "deny" and
567 other ACL rejections are.
569 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
570 with slight modification.
572 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
573 draft, changing the syntax and factoring some duplicate code".
575 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
576 for deliveries of the second and subsequent messages over the same SMTP
579 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
580 ${reduce, with only minor "tidies".
582 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
584 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
585 expansion side effects.
587 PH/27 When a message times out after an over-quota error from an Exim-imposed
588 quota, the bounce message says "mailbox is full". This message was not
589 being given when it was a system quota that was exceeded. It now should
592 MH/03 Made $recipients available in local_scan(). local_scan() already has
593 better access to the recipient list through recipients_list[], but
594 $recipients can be useful in postmaster-provided expansion strings.
596 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
597 in the case of a MAIL command with additional options following the
598 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
599 were accidentally chopped off.
601 PH/29 SMTP synchronization checks are implemented when a command is read -
602 there is a check that no more input is waiting when there shouldn't be
603 any. However, for some commands, a delay in an ACL can mean that it is
604 some time before the response is written. In this time, more input might
605 arrive, invalidly. So now there are extra checks after an ACL has run for
606 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
607 pipelining has not been advertised.
609 PH/30 MH's patch to allow iscntrl() characters to be list separators.
611 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
612 returned in the SMTP response when smtp_return_error_details was false.
615 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
616 instead of the C I/O that was originally supplied, because problems were
619 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
620 Exim which did not show up earlier: it was assuming that a call to
621 SSL_CTX_set_info_callback() might give an error value. In fact, there is
622 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
623 was a macro that became an assignment, so it seemed to work. This has
624 changed to a proper function call with a void return, hence the compile
625 error. Exim's code has been fixed.
627 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
630 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
632 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
634 PH/37 If a message is not accepted after it has had an id assigned (e.g.
635 because it turns out to be too big or there is a timeout) there is no
636 "Completed" line in the log. When some messages of this type were
637 selected by exigrep, they were listed as "not completed". Others were
638 picked up by some special patterns. I have improved the selection
639 criteria to be more general.
641 PH/38 The host_find_failed option in the manualroute router can now be set
642 to "ignore", to completely ignore a host whose IP address cannot be
643 found. If all hosts are ignored, the behaviour is controlled by the new
644 host_all_ignored option.
646 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
647 homing or because of multiple MX records with /mx) generated more than
648 one IP address, and the following item turned out to be the local host,
649 all the secondary addresses of the first item were incorrectly removed
650 from the list, along with the local host and any following hosts (which
651 is what is supposed to happen).
653 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
654 whoever called Exim into the -H file. In the case of the daemon it was
655 behaving confusingly. When first started, it used values for whoever
656 started the daemon, but after a SIGHUP it used the Exim user (because it
657 calls itself on a restart). I have changed the code so that it now always
660 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
661 message are rejected with the same error (e.g. no authentication or bad
662 sender address), and a DATA command is nevertheless sent (as can happen
663 with PIPELINING or a stupid MUA), the error message that was given to the
664 RCPT commands is included in the rejection of the DATA command. This is
665 intended to be helpful for MUAs that show only the final error to their
668 PH/42 Another patch from the Sieve maintainer.
670 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
671 Eximstats - Fixed some broken HTML links and added missing column headers
673 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
674 columns for Rejects, Temp Rejects, Ham, and Spam rows.
676 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
678 PH/43 Yet another patch from the Sieve maintainer.
680 PH/44 I found a way to check for a TCP/IP connection going away before sending
681 the response to the final '.' that terminates a message, but only in the
682 case where the client has not sent further data following the '.'
683 (unfortunately, this is allowed). However, in many cases there won't be
684 any further data because there won't be any more messages to send. A call
685 to select() can be used: if it shows that the input is "ready", there is
686 either input waiting, or the socket has been closed. An attempt to read
687 the next input character can distinguish the two cases. Previously, Exim
688 would have sent an OK response which the client would never have see.
689 This could lead to message repetition. This fix should cure that, at
690 least in a lot of common cases.
692 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
693 advertised in response to EHLO.
699 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
700 fixed by 4.65/MH/01 (is this a record?) are fixed:
702 (i) An empty string was always treated as zero by the numeric comparison
703 operators. This behaviour has been restored.
705 (ii) It is documented that the numeric comparison operators always treat
706 their arguments as decimal numbers. This was broken in that numbers
707 starting with 0 were being interpreted as octal.
709 While fixing these problems I realized that there was another issue that
710 hadn't been noticed. Values of message_size_limit (both the global option
711 and the transport option) were treated as octal if they started with 0.
712 The documentation was vague. These values are now always treated as
713 decimal, and I will make that clear in the documentation.
719 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
720 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
723 MH/01 Don't check that the operands of numeric comparison operators are
724 integers when their expansion is in "skipping" mode (fixes bug
725 introduced by 4.64-PH/07).
727 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
728 child addresses, Exim now panics and dies. Previously, because the count
729 is held in a short int, deliveries were likely to be lost. As such a
730 large number of recipients for a single message is ridiculous
731 (performance will be very, very poor), I have chosen to impose a limit
732 rather than extend the field.
738 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
739 leftover -K file (the existence of which was triggered by #402).
740 While we were at it, introduced process PID as part of the -K
741 filename. This should rule out race conditions when creating
744 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
745 processing considerably. Previous code took too long for large mails,
746 triggering a timeout which in turn triggers #401.
748 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
749 in the DK code in transports.c. sendfile() is not really portable,
750 hence the _LINUX specificness.
752 TF/01 In the add_headers option to the mail command in an Exim filter,
753 there was a bug that Exim would claim a syntax error in any
754 header after the first one which had an odd number of characters
757 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
758 callout verification, Exim cached a "reject" for the entire domain. This
759 is correct for most verifications, but it is not correct for a recipient
760 verification with use_sender or use_postmaster set, because in that case
761 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
762 case of MAIL FROM:<> rejection from other early rejections (e.g.
763 rejection of HELO). When verifying a recipient using a non-null MAIL
764 address, the cache is ignored if it shows MAIL FROM:<> rejection.
765 Whatever the result of the callout, the value of the domain cache is
766 left unchanged (for any other kind of callout, getting as far as trying
767 RCPT means that the domain itself is ok).
769 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
772 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
773 manifest itself as EPIPE rather than ECONNECT. When tidying away a
774 session, the daemon ignores ECONNECT errors and logs others; it now
775 ignores EPIPE as well.
777 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
778 (quoted-printable decoding).
780 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
781 later the small subsequent patch to fix an introduced bug.
783 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
785 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
787 PH/08 An error is now given if message_size_limit is specified negative.
789 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
790 to be given (somewhat) arbitrary names.
792 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
795 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
796 miscellaneous code fixes
798 PH/10 Added the log_reject_target ACL modifier to specify where to log
801 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
802 hostname. This is wrong, because it relates to the incoming message (and
803 probably the interface on which it is arriving) and not to the outgoing
804 callout (which could be using a different interface). This has been
805 changed to use the value of the helo_data option from the smtp transport
806 instead - this is what is used when a message is actually being sent. If
807 there is no remote transport (possible with a router that sets up host
808 addresses), $smtp_active_hostname is used.
810 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
811 tweaks were necessary in order to get it to work (see also 21 below):
812 (a) The code assumed that strncpy() returns a negative number on buffer
813 overflow, which isn't the case. Replaced with Exim's string_format()
815 (b) There were several signed/unsigned issues. I just did the minimum
816 hacking in of casts. There is scope for a larger refactoring.
817 (c) The code used strcasecmp() which is not a standard C function.
818 Replaced with Exim's strcmpic() function.
819 (d) The code set only $1; it now sets $auth1 as well.
820 (e) A simple test gave the error "authentication client didn't specify
821 service in request". It would seem that Dovecot has changed its
822 interface. Fortunately there's a specification; I followed it and
823 changed what the client sends and it appears to be working now.
825 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
828 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
829 address A is aliased to B and C, where B exists and C does not. Without
830 -v the output is "A verified" because verification stops after a
831 successful redirection if more than one address is generated. However,
832 with -v the child addresses are also verified. Exim was outputting "A
833 failed to verify" and then showing the successful verification for C,
834 with its parentage. It now outputs "B failed to verify", showing B's
835 parentage before showing the successful verification of C.
837 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
838 look up a TXT record in a specific list after matching in a combined
841 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
842 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
843 they consult the DNS. I had assumed they would set it the way they
844 wanted; and indeed my experiments on Linux seem to show that in some
845 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
846 To be on the safe side, however, I have now made the interface to
847 host_find_byname() similar to host_find_bydns(), with an argument
848 containing the DNS resolver options. The host_find_byname() function now
849 sets these options at its start, just as host_find_bydns() does. The smtp
850 transport options dns_qualify_single and dns_search_parents are passed to
851 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
852 of host_find_byname() use the default settings of RES_DEFNAMES
853 (qualify_single) but not RES_DNSRCH (search_parents).
855 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
856 spool_read_header() do less string testing, by means of a preliminary
857 switch on the second character of optional "-foo" lines. (This is
858 overdue, caused by the large number of possibilities that now exist.
859 Originally there were few.) While I was there, I also converted the
860 str(n)cmp tests so they don't re-test the leading "-" and the first
861 character, in the hope this might squeeze out yet more improvement.
863 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
864 flag allowing group syntax was set by the header_syntax check but not
865 turned off, possible causing trouble later; (2) The flag was not being
866 set at all for the header_verify test, causing "group"-style headers to
867 be rejected. I have now set it in this case, and also caused header_
868 verify to ignore an empty address taken from a group. While doing this, I
869 came across some other cases where the code for allowing group syntax
870 while scanning a header line wasn't quite right (mostly, not resetting
871 the flag correctly in the right place). These bugs could have caused
872 trouble for malformed header lines. I hope it is now all correct.
874 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
875 with the "reply" argument non-NULL. The code, however (which originally
876 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
877 but it didn't always do it. This confused somebody who was copying the
878 code for some other use. I have removed all the tests.
880 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
881 feature that was used to support insecure browsers during the U.S. crypto
882 embargo. It requires special client support, and Exim is probably the
883 only MTA that supported it -- and would never use it because real RSA is
884 always available. This code has been removed, because it had the bad
885 effect of slowing Exim down by computing (never used) parameters for the
886 RSA_EXPORT functionality.
888 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
889 authenticator to fail if there's a tab character in the incoming data
890 (there should never be unless someone is messing about, as it's supposed
891 to be base64-encoded). Also added, on Timo's advice, the "secured" option
892 if the connection is using TLS or if the remote IP is the same as the
893 local IP, and the "valid-client-cert option" if a client certificate has
896 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
897 authenticators. This can be used for authorization after authentication
898 succeeds. (In the case of plaintext, it servers for both authentication
901 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
902 if any retry times were supplied.
904 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
905 connection, where there is no client IP address to check. In this
906 situation, the verify now always succeeds.
908 PH/25 Applied John Jetmore's -Mset patch.
910 PH/26 Added -bem to be like -Mset, but loading a message from a file.
912 PH/27 In a string expansion for a processed (not raw) header when multiple
913 headers of the same name were present, leading whitespace was being
914 removed from all of them, but trailing whitespace was being removed only
915 from the last one. Now trailing whitespace is removed from each header
916 before concatenation. Completely empty headers in a concatenation (as
919 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
920 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
922 PH/29 [Removed. This was a change that I later backed out, and forgot to
923 correct the ChangeLog entry (that I had efficiently created) before
924 committing the later change.]
926 PH/30 Exim was sometimes attempting to deliver messages that had suffered
927 address errors (4xx response to RCPT) over the same connection as other
928 messages routed to the same hosts. Such deliveries are always "forced",
929 so retry times are not inspected. This resulted in far too many retries
930 for the affected addresses. The effect occurred only when there were more
931 hosts than the hosts_max_try setting in the smtp transport when it had
932 the 4xx errors. Those hosts that it had tried were not added to the list
933 of hosts for which the message was waiting, so if all were tried, there
934 was no problem. Two fixes have been applied:
936 (i) If there are any address or message errors in an SMTP delivery, none
937 of the hosts (tried or untried) are now added to the list of hosts
938 for which the message is waiting, so the message should not be a
939 candidate for sending over the same connection that was used for a
940 successful delivery of some other message. This seems entirely
941 reasonable: after all the message is NOT "waiting for some host".
942 This is so "obvious" that I'm not sure why it wasn't done
943 previously. Hope I haven't missed anything, but it can't do any
944 harm, as the worst effect is to miss an optimization.
946 (ii) If, despite (i), such a delivery is accidentally attempted, the
947 routing retry time is respected, so at least it doesn't keep
948 hammering the server.
950 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
951 in ${readsocket because some servers need this prod.
953 PH/32 Added some extra debug output when updating a wait-xxx database.
955 PH/33 The hint "could be header name not terminated by colon", which has been
956 given for certain expansion errors for a long time, was not being given
957 for the ${if def:h_colon_omitted{... case.
959 PH/34 The spec says: "With one important exception, whenever a domain list is
960 being scanned, $domain contains the subject domain." There was at least
961 one case where this was not true.
963 PH/35 The error "getsockname() failed: connection reset by peer" was being
964 written to the panic log as well as the main log, but it isn't really
965 panic-worthy as it just means the connection died rather early on. I have
966 removed the panic log writing for the ECONNRESET error when getsockname()
969 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
970 runs only) independently of the message's sender address. This meant
971 that, if the 4xx error was in fact related to the sender, a different
972 message to the same recipient with a different sender could confuse
973 things. In particualar, this can happen when sending to a greylisting
974 server, but other circumstances could also provoke similar problems.
975 I have changed the default so that the retry time for these errors is now
976 based a combination of the sender and recipient addresses. This change
977 can be overridden by setting address_retry_include_sender=false in the
980 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
981 remote server are returned as part of bounce messages. This was not
982 happening for LMTP over a pipe (the lmtp transport), but now it is the
983 same for both kinds of LMTP.
985 PH/38 Despite being documented as not happening, Exim was rewriting addresses
986 in header lines that were in fact CNAMEs. This is no longer the case.
988 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
989 and queue runs started by the daemon processed all messages. This has
990 been fixed so that -R and -S can now usefully be given with -q<time>.
992 PH/40 Import PCRE release 6.7 (fixes some bugs).
994 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
996 PH/42 Give an error if -q is specified more than once.
998 PH/43 Renamed the variables $interface_address and $interface_port as
999 $received_ip_address and $received_port, to make it clear that these
1000 values apply to message reception, and not to the outgoing interface when
1001 a message is delivered. (The old names remain recognized, of course.)
1003 PH/44 There was no timeout on the connect() call when using a Unix domain
1004 socket in the ${readsocket expansion. There now is.
1006 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1007 be meaningful with "accept".
1009 SC/01 Eximstats V1.43
1010 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1012 SC/02 Eximstats V1.44
1013 Use a glob alias rather than an array ref in the generated
1014 parser. This improves both readability and performance.
1016 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1017 Collect SpamAssassin and rejection statistics.
1018 Don't display local sender or destination tables unless
1019 there is data to show.
1020 Added average volumes into the top table text output.
1022 SC/04 Eximstats V1.46
1023 Collect data on the number of addresses (recipients)
1024 as well as the number of messages.
1026 SC/05 Eximstats V1.47
1027 Added 'Message too big' to the list of mail rejection
1028 reasons (thanks to Marco Gaiarin).
1030 SC/06 Eximstats V1.48
1031 Mainlog lines which have GMT offsets and are too short to
1032 have a flag are now skipped.
1034 SC/07 Eximstats V1.49 (Alain Williams)
1035 Added the -emptyok flag.
1037 SC/08 Eximstats V1.50
1038 Fixes for obtaining the IP address from reject messages.
1040 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1041 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1042 whitesspace changes from 4.64-PH/27
1044 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1047 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1048 are found, allow negative numbers in numeric criteria)
1050 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1052 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1053 to match changes made in 4.64-PH/43
1055 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1057 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1058 "domain" is actually an IP address, and force a failure. This locks out
1059 those revolvers/nameservers that support "A-for-A" lookups, in
1060 contravention of the specifications.
1062 PH/48 When a host name was looked up from an IP address, and the subsequent
1063 forward lookup of the name timed out, the host name was left in
1064 $sender_host_name, contrary to the specification.
1066 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1067 restricted to single-key lookups, Exim was not diagnosing an error if
1068 * or *@ was used with a query-style lookup.
1070 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1072 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1073 long ago, but noone interested enough thought of it. Let's just say that
1074 the "1.1" means that there are some new functions that weren't there at
1075 some point in the past.
1077 PH/51 Error processing for expansion failure of helo_data from an smtp
1078 transport during callout processing was broken.
1080 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1081 tested/used via the -bh/-bhc/-bs options.
1083 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1084 bug, fixed in subsequent PCRE releases).
1086 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1087 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1089 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1095 SC/01 Use a glob alias rather than an array ref in eximstats generated
1096 parser. This improves both readability and performance.
1098 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1099 Don't display local sender or destination tables in eximstats unless
1100 there is data to show.
1101 Added average volumes into the eximstats top table text output.
1103 SC/03 Collect data on the number of addresses (recipients) as well
1104 as the number of messages in eximstats.
1106 TF/01 Correct an error in the documentation for the redirect router. Exim
1107 does (usually) call initgroups() when daemonizing.
1109 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1110 with consistent privilege compared to when running as a daemon.
1112 TF/03 Note in the spec that $authenticated_id is not set for local
1113 submissions from trusted users.
1115 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1116 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1118 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1119 by adding some example configuration directives to the default
1120 configuration file. A little bit of work is required to uncomment the
1121 directives and define how usernames and passwords are checked, but
1122 there is now a framework to start from.
1124 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1125 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1126 without this. I don't know how relevant this is to other LDAP libraries.
1128 PH/02 Add the verb name to the "unknown ACL verb" error.
1130 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1132 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1134 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1135 directory not expanded when it should be if an expanded home directory
1136 was set for the address (which is overridden by the transport).
1138 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1141 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1142 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1143 because it is too late at that time, and has no effect.
1145 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1146 security issue with \' (bugzilla #107). I could not use the
1147 PQescapeStringConn() function, because it needs a PGconn value as one of
1150 PH/08 When testing addresses using -bt, indicate those final addresses that
1151 are duplicates that would not cause an additional delivery. At least one
1152 person was confused, thinking that -bt output corresponded to deliveries.
1153 (Suppressing duplicates isn't a good idea as you lose the information
1154 about possibly different redirections that led to the duplicates.)
1156 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1157 systems where poll() doesn't work, in particular OS X.
1159 PH/10 Added more information to debugging output for retry time not reached.
1161 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1162 operations in malware.c.
1164 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1167 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1168 syslog_duplication set false, log lines that would normally be written
1169 both the the main log and to the reject log were not written to syslog at
1172 PH/14 In the default configuration, change the use of "message" in ACL warn
1173 statements to "add_header".
1175 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1176 not followed by a command (e.g. "seen endif").
1178 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1179 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1182 PH/17 Added extra conditions to the default value of delay_warning_condition
1186 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1187 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1188 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1191 The Auto-Submitted: and various List- headers are standardised, whereas I
1192 don't think Precedence: ever was.
1194 PH/18 Refactored debugging code in route_finduser() to show more information,
1195 in particular, the error code if getpwnam() issues one.
1197 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1198 This is apparently needed in addition to the PH/07 change above to avoid
1199 any possible encoding problems.
1201 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1202 but not after initializing Perl.
1204 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1205 output them only if debugging. By default they are written stderr,
1206 apparently, which is not desirable.
1208 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1211 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1214 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1216 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1217 authenticated or an ident call has been made. Suppress the default
1218 values for $authenticated_id and $authenticated_sender (but permit -oMai
1219 and -oMas) when testing with -bh.
1221 PH/24 Re-jigged the order of the tests in the default configuration so that the
1222 tests for valid domains and recipients precede the DNS black list and CSA
1223 tests, on the grounds that those ones are more expensive.
1225 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1226 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1227 This bug exists in every version of Exim that I still have, right back to
1230 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1231 However, an attempt to turn on case-sensitivity in a regex key by
1232 including (?-i) didn't work because the subject string was already
1233 lowercased, and the effects were non-intuitive. It turns out that a
1234 one-line patch can be used to allow (?-i) to work as expected.
1240 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1241 other effects) broke the use of negated acl sub-conditions.
1243 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1246 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1247 "Deny" causes Exim to reject the incoming connection with a 554 error.
1248 Unfortunately, if there is a major crisis, such as a disk failure,
1249 tcp-wrappers gives "deny", whereas what one would like would be some
1250 kind of temporary error. A kludge has been added to help with this.
1251 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1252 554 error is used if errno is still zero or contains ENOENT (which occurs
1253 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1256 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1258 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1259 errors. Otherwise a message that provokes a temporary error (when other
1260 messages do not) can cause a whole host to time out.
1262 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1263 addresses were routed directly to files or pipes from a redirect router.
1264 File deliveries just didn't batch; pipe deliveries might have suffered
1267 PH/06 A failure to get a lock for a hints database would erroneously always say
1268 "Failed to get write lock", even when it was really a read lock.
1270 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1271 of 0600. This has been changed to use the value of the lockfile_mode
1272 option (which defaults to 0600).
1274 PH/08 Applied small patch from the Sieve maintainer.
1276 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1277 folder from quota calculations, a direct delivery into this folder messed
1278 up the contents of the maildirsize file. This was because the regex was
1279 used only to exclude .Trash (or whatever) when the size of the mailbox
1280 was calculated. There was no check that a delivery was happening into an
1281 excluded directory. This bug has been fixed by ignoring all quota
1282 processing for deliveries into excluded directories.
1284 PH/10 Added the maildirfolder_create_regex option to appendfile.
1290 PH/01 The code for finding all the local interface addresses on a FreeBSD
1291 system running IPv6 was broken. This may well have applied to all BSD
1292 systems, as well as to others that have similar system calls. The broken
1293 code found IPv4 interfaces correctly, but gave incorrect values for the
1294 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1295 that it would not match correctly against @[] and not recognize the IPv6
1298 PH/02 The ipliteral router was not recognizing addresses of the form user@
1299 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1301 PH/03 Added disable_ipv6.
1303 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1304 decoded form, because it is most often used to construct To: headers
1305 lines in autoreplies, and the decoded form may well be syntactically
1306 invalid. However, $reply_address has leading white space removed, and all
1307 newlines turned into spaces so that the autoreply transport does not
1310 PH/05 If group was specified without a user on a router, and no group or user
1311 was specified on a transport, the group from the router was ignored.
1313 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1314 for visible compile-time settings that can be used to change these
1315 numbers, for those that want even more. Backwards compatibility with old
1316 spool files has been maintained. However, going back to a previous Exim
1317 release will lost any variables that are in spool files.
1319 PH/07 Two small changes when running in the test harness: increase delay when
1320 passing a TCP/IP connection to a new process, in case the original
1321 process has to generate a bounce, and remove special handling of
1322 127.0.0.2 (sic), which is no longer necessary.
1324 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1325 be the same on different OS.
1327 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1330 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1331 whether --show-vars was specified or not
1333 JJ/02 exipick: Added support for new ACL variable spool format introduced
1336 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1337 syntactically invalid From: or Reply-to: line, and a filter used this to
1338 generate an autoreply, and therefore failed to obtain an address for the
1339 autoreply, Exim could try to deliver to a non-existent relative file
1340 name, causing unrelated and misleading errors. What now happens is that
1341 it logs this as a hard delivery error, but does not attempt to create a
1344 PH/11 The exinext utility has a -C option for testing purposes, but although
1345 the given file was scanned by exinext itself; it wasn't being passed on
1346 when Exim was called.
1348 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1349 an end-of-file indication when reading a command response.
1351 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1352 compiled. In many other places in Exim, IPv6 addresses are always
1353 recognized, so I have changed this. It also means that IPv4 domain
1354 literals of the form [IPV4:n.n.n.n] are now always recognized.
1356 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1357 used if the router is not running as root, for example, when verifying at
1358 ACL time, or when using -bh. The debugging output from this situation was
1359 non-existent - all you got was a failure to exec. I have made two
1362 (a) Failures to set uid/gid, the current directory, or a process leader
1363 in a subprocess such as that created by queryprogram now generate
1364 suitable debugging ouput when -d is set.
1366 (b) The queryprogram router detects when it is not running as root,
1367 outputs suitable debugging information if -d is set, and then runs
1368 the subprocess without attempting to change uid/gid.
1370 PH/15 Minor change to Makefile for building test_host (undocumented testing
1373 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1374 additional section of a DNS packet that returns MX or SRV records.
1375 Instead, it always explicitly searches for A/AAAA records. This avoids
1376 major problems that occur when a DNS server includes only records of one
1377 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1378 fixed another bug: if SRV records were looked up and the corresponding
1379 address records were *not* found in the additional section, the port
1380 values from the SRV records were lost.
1382 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1383 using the correct key (the original address) when searching the retry
1384 rules in order to find which one to use for generating the retry hint.
1386 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1387 adding the default one. Similarly, if it contains a Reply-To: header, the
1388 errors_reply_to option, if set, is not used.
1390 PH/19 When calculating a retry time, Exim used to measure the "time since
1391 failure" by looking at the "first failed" field in the retry record. Now
1392 it does not use this if it is later than than the arrival time of the
1393 message. Instead it uses the arrival time. This makes for better
1394 behaviour in cases where some deliveries succeed, thus re-setting the
1395 "first failed" field. An example is a quota failure for a huge message
1396 when small messages continue to be delivered. Without this change, the
1397 "time since failure" will always be short, possible causing more frequent
1398 delivery attempts for the huge message than are intended.
1399 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1401 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1402 $1, $2, $3) because the numerical variables can be reset during some
1403 expansion items (e.g. "match"), thereby losing the authentication data.
1405 PH/21 Make -bV show the size of off_t variables so that the test suite can
1406 decide whether to run tests for quotas > 2G.
1408 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1409 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1410 filecount value is greater than 2G or if a quota value is greater than 2G
1411 on a system where the size of off_t is not greater than 4, a panic error
1414 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1415 never match. The debug and -bh output now contains an explicit error
1416 message indicating a malformed IPv4 address or mask.
1418 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1419 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1420 PH/23 above applies.
1422 PH/25 Do not write to syslog when running in the test harness. The only
1423 occasion when this arises is a failure to open the main or panic logs
1424 (for which there is an explicit test).
1426 PH/26 Added the /no_tell option to "control=freeze".
1428 PH/27 If a host name lookup failed very early in a connection, for example, if
1429 the IP address matched host_lookup and the reverse lookup yielded a name
1430 that did not have a forward lookup, an error message of the form "no IP
1431 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1432 could be logged. Now it outputs the IP address instead of "NULL".
1434 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1435 allows the sender and the authenticated sender to be set when
1436 submitting a message from within Exim. Since child_open_exim() is
1437 documented for local_scan(), the new function should be too.
1439 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1440 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1441 results in an empty string is now treated as unset.
1443 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1445 PH/31 Added sender_verify_fail logging option.
1447 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1448 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1449 tidied the source and removed it altogether.
1451 PH/33 When a queue run was abandoned because the load average was too high, a
1452 log line was always written; now it is written only if the queue_run log
1453 selector is set. In addition, the log line for abandonment now contains
1454 information about the queue run such as the pid. This is always present
1455 in "start" and "stop" lines but was omitted from the "abandon" line.
1457 PH/34 Omit spaces between a header name and the colon in the error message that
1458 is given when verify = headers_syntax fails (if there are lots of them,
1459 the message gets confusing).
1461 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1462 names, as there are now some PTR records that contain slashes. This check
1463 is only to protect against broken name servers that fall over on strange
1464 characters, so the fact that it applies to all lookups doesn't matter.
1466 PH/36 Now that the new test suite is complete, we can remove some of the
1467 special code in Exim that was needed for the old test suite. For example,
1468 sorting DNS records because real resolvers return them in an arbitrary
1469 order. The new test suite's fake resolver always returns records in the
1472 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1473 bounces) except when queue_only is set, to avoid logging races between
1474 the different processes.
1476 PH/38 Panic-die if .include specifies a non-absolute path.
1478 PH/39 A tweak to the "H" retry rule from its user.
1480 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1481 a label. They prevented compilation on older perls.
1483 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1484 a warning to be raised on newish perls.
1486 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1487 on queue. Changes to match documented behaviour of showing count of
1488 messages matching specified criteria.
1490 PH/40 Changed the default ident timeout from 30s to 5s.
1492 PH/41 Added support for the use of login_cap features, on those BSD systems
1493 that have them, for controlling the resources used by pipe deliveries.
1495 PH/42 The content-scanning code uses fopen() to create files in which to put
1496 message data. Previously it was not paying any attention to the mode of
1497 the files. Exim runs with umask(0) because the rest of the code creates
1498 files with open(), and sets the required mode explicitly. Thus, these
1499 files were ending up world-writeable. This was not a big issue, because,
1500 being within the spool directory, they were not world-accessible. I have
1501 created a function called modefopen, which takes an additional mode
1502 argument. It sets umask(777), creates the file, chmods it to the required
1503 mode, then resets the umask. All the relevant calls to fopen() in the
1504 content scanning code have been changed to use this function.
1506 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1507 to 24 hours. This avoids potential overflow problems when processing G
1508 and H retry rules. I suspect nobody ever tinkers with this value.
1510 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1512 PH/45 When the plaintext authenticator is running as a client, the server's
1513 challenges are checked to ensure they are valid base64 strings. By
1514 default, the authentication attempt is cancelled if an invalid string is
1515 received. Setting client_ignore_invalid_base64 true ignores these errors.
1516 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1517 they are received. Thus, the responses can be made to depend on the
1518 challenges. If an invalid string is ignored, an empty string is placed in
1521 PH/46 Messages that are created by the autoreply transport now contains a
1522 References: header, in accordance with RFCs 2822 and 3834.
1524 PH/47 Added authenticated_sender_force to the smtp transport.
1526 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1528 PH/49 Installed latest patch from the Sieve maintainer.
1530 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1531 was also set, the appendfile transport was unnecessarily scanning a
1532 directory of message files (e.g. for maildir delivery) to find the count
1533 of files (along with the size), even though it did not need this
1534 information. It now does the scan only if it needs to find either the
1535 size of the count of files.
1537 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1539 PH/52 Two bugs concerned with error handling when the smtp transport is
1542 (i) Exim was not creating retry information for temporary errors given
1543 for individual recipients after the DATA command when the smtp transport
1544 was used in LMTP mode. This meant that they could be retried too
1545 frequently, and not timed out correctly.
1547 (ii) Exim was setting the flag that allows error details to be returned
1548 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1549 recipients that were returned after the DATA command.
1551 PH/53 This is related to PH/52, but is more general: for any failing address,
1552 when detailed error information was permitted to be returned to the
1553 sender, but the error was temporary, then after the final timeout, only
1554 "retry timeout exceeded" was returned. Now it returns the full error as
1555 well as "retry timeout exceeded".
1557 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1558 do this, and (what is worse) MTAs that accept it.
1560 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1561 will now be deprecated.
1563 PH/56 New os.c-cygwin from the Cygwin maintainer.
1565 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1566 formats (previously only available in exim formats via -bpr, -bpru,
1567 and -bpra. Now also available in native and exiqgrep formats)
1569 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1570 with very large, slow to parse queues
1572 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1574 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1576 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1577 responses to authentication challenges, though it was showing the
1578 challenges; (ii) I've removed the CR characters from the debug output for
1581 PH/58 Allow for the insertion of a newline as well as a space when a string
1582 is turned into more than one encoded-word during RFC 2047 encoding. The
1583 Sieve code now uses this.
1585 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1586 data_4xx, lost_connection, tls_required.
1588 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1589 message was being sent as an SMTP response.
1591 PH/61 Add -l and -k options to exicyclog.
1593 PH/62 When verifying, if an address was redirected to one new address, so that
1594 verification continued, and the new address failed or deferred after
1595 having set something in $address_data, the value of $address_data was not
1596 passed back to the ACL. This was different to the case when no
1597 redirection occurred. The value is now passed back in both cases.
1599 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1600 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1601 use login_cap.h, so on its own it isn't the distinguishing feature. The
1602 new name refers directly to the setclassresources() function.
1604 PH/65 Added configuration files for NetBSD3.
1606 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1608 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1609 is preferred over IPv4.
1611 PH/68 The bounce_return_message and bounce_return_body options were not being
1612 honoured for bounces generated during the reception of non-SMTP messages.
1613 In particular, this applied to messages rejected by the ACL. This bug has
1614 been fixed. However, if bounce_return_message is true and bounce_return_
1615 body is false, the headers that are returned for a non-SMTP message
1616 include only those that have been read before the error was detected.
1617 (In the case of an ACL rejection, they have all been read.)
1619 PH/69 The HTML version of the specification is now built in a directory called
1620 spec_html instead of spec.html, because the latter looks like a path with
1621 a MIME-type, and this confuses some software.
1623 PH/70 Catch two compiler warnings in sieve.c.
1625 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1626 function verify_get_ident() calls ip_connect() to connect a socket, but
1627 if the "connect()" function timed out, ip_connect() used to close the
1628 socket. However, verify_get_ident() also closes the socket later, and in
1629 between Exim writes to the log, which may get opened at this point. When
1630 the socket was closed in ip_connect(), the log could get the same file
1631 descriptor number as the socket. This naturally causes chaos. The fix is
1632 not to close the socket in ip_connect(); the socket should be closed by
1633 the function that creates it. There was only one place in the code where
1634 this was missing, in the iplookup router, which I don't think anybody now
1635 uses, but I've fixed it anyway.
1637 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1638 well as to direct DNS lookups. Otherwise the handling of names in host
1639 lists is inconsistent and therefore confusing.
1645 PH/01 Two changes to the default runtime configuration:
1647 (1) Move the checks for relay_from_hosts and authenticated clients from
1648 after to before the (commented out) DNS black list checks.
1650 (2) Add control=submission to the relay_from_hosts and authenticated
1651 clients checks, on the grounds that messages accepted by these
1652 statements are most likely to be submissions.
1654 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1656 (1) Generate an error if the third argument for the ${prvs expansion is
1659 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1662 (3) Reset the variables that are obtained from the first argument of
1663 ${prvscheck and used in the second argument before leaving the code,
1664 because their memory is reclaimed, so using them afterwards may do
1667 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1668 one (it's much easier than Tom thought :-).
1670 (5) Because of (4), we can now allow for the use of $prvscheck_result
1671 inside the third argument.
1673 PH/03 For some reason, the default setting of PATH when running a command from
1674 a pipe transport was just "/usr/bin". I have changed it to
1677 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1678 anything to be listed in the output from -bV.
1680 PH/05 When a filter generated an autoreply, the entire To: header line was
1681 quoted in the delivery log line, like this:
1683 => >A.N.Other <ano@some.domain> <original@ddress> ...
1685 This has been changed so that it extracts the operative address. There
1686 may be more than one such address. If so, they are comma-separated, like
1689 => >ano@some.domain,ona@other.domain <original@ddress> ...
1691 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1692 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1693 not being looked up in the rDNS to get a host name, Exim was showing the
1694 IP address twice in Received: lines, even though the IP addresses were
1695 identical. For example:
1697 Received: from [1.2.3.4] (helo=[1.2.3.4])
1699 However, if the real host name was known, it was omitting the HELO data
1700 if it matched the actual IP address. This has been tidied up so that it
1701 doesn't show the same IP address twice.
1703 PH/07 When both +timestamp and +memory debugging was on, the value given by
1704 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1705 called by the debug printing, thereby overwriting the timestamp buffer.
1706 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1708 PH/08 When the original message was included in an autoreply transport, it
1709 always said "this is a copy of the message, including all the headers",
1710 even if body_only or headers_only was set. It now gives an appropriate
1713 PH/09 Applied a patch from the Sieve maintainer which:
1715 o fixes some comments
1716 o adds the (disabled) notify extension core
1717 o adds some debug output for the result of if/elsif tests
1718 o points to the current vacation draft in the documentation
1719 and documents the missing references header update
1723 o fixes a bug in processing the envelope test (when testing
1724 multiple envelope elements, the last element determinted the
1727 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1728 Electronic Mail") by including:
1730 Auto-submitted: auto-generated
1732 in the messages that it generates (bounce messages and others, such as
1733 warnings). In the case of bounce messages for non-SMTP mesages, there was
1734 also a typo: it was using "Auto_submitted" (underscore instead of
1735 hyphen). Since every message generated by Exim is necessarily in response
1736 to another message, thes have all been changed to:
1738 Auto-Submitted: auto-replied
1740 in accordance with these statements in the RFC:
1742 The auto-replied keyword:
1744 - SHOULD be used on messages sent in direct response to another
1745 message by an automatic process,
1747 - MUST NOT be used on manually-generated messages,
1749 - MAY be used on Delivery Status Notifications (DSNs) and Message
1750 Disposition Notifications (MDNs),
1752 - MUST NOT be used on messages generated by automatic or periodic
1753 processes, except for messages which are automatic responses to
1756 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1757 to the default Received: header definition.
1759 PH/12 Added log selector acl_warn_skipped (default on).
1761 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1762 variables because (a) they are in the wrong storage pool and (b) even if
1763 they were copied, it wouldn't work properly because of the caching.
1765 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1766 checking when decoding. Apparently there are clients that generate
1767 overlong encoded strings. Why am I not surprised?
1769 PH/15 If the first argument of "${if match_address" was not empty, but did not
1770 contain an "@" character, Exim crashed. Now it writes a panic log message
1771 and treats the condition as false.
1773 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1775 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1776 extension "envelope-auth". The code is finished and in agreement with
1777 other implementations, but there is no documentation so far and in fact,
1778 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1779 not changing the active code.
1781 Print executed "if" and "elsif" statements when debugging is used. This
1782 helps a great deal to understand what a filter does.
1784 Document more things not specified clearly in RFC3028. I had all this
1785 sorted out, when out of a sudden new issues came to my mind. Oops."
1787 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1790 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1791 canonical form (as documented). However, after a host name lookup from
1792 the IP address, check_host() was doing a simple string comparison with
1793 addresses acquired from the DNS when checking that the found name did
1794 have the original IP as one of its addresses. Since any found IPv6
1795 addresses are likely to be in abbreviated form, the comparison could
1796 fail. Luckily, there already exists a function for doing the comparison
1797 by converting both addresses to binary, so now that is used instead of
1798 the text comparison.
1800 PH/20 There was another similar case to PH/19, when a complete host name was
1801 given in a host list; looking up its IP address could give an abbreviated
1802 form, whereas the current host's name might or might not be abbreviated.
1803 The same fix has been applied.
1809 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1810 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1813 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1814 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1816 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1818 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1819 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1820 Also, for "Auto-Submitted", treat anything other than "no" as
1821 non-personal, in accordance with RFC 3834. (Previously it treated
1822 anything starting "auto-" as non-personal.)
1824 TF/01 The control=submission/name=... option had a problem with syntax
1825 errors if the name included a slash character. The /name= option
1826 now slurps the rest of the string, so it can include any characters
1827 but it must come last in the list of options (after /sender_retain
1830 PH/05 Some modifications to the interface to the fake nameserver for the new
1838 TK/01 Added the "success_on_redirect" address verification option. See
1839 NewStuff for rationale and an example.
1841 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1843 PH/02 Patch to exigrep to allow it to work on syslog lines.
1845 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1846 fread() to skip over the body file's header line, because in Cygwin the
1847 header line is locked and is inaccessible.
1849 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1850 co-exist for some time) to make it clear that it is the Exim ID that is
1851 referenced, not the Message-ID: header line.
1853 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1854 string_format() function, because snprintf() does not exist on all
1857 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1858 ${stat: expansion item.
1860 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1861 protocol synchronization error", to keep the pedants happy.
1863 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1864 well as for IRIX systems, when gcc is being used. See the host.c source
1867 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1869 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1872 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1873 transport and to the smtp transport in LMTP mode.
1875 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1877 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1878 run a filter in a subprocess. This could lead to confusion in subsequent
1879 lookups in the parent process. There should also be a search_tidyup() at
1880 the end of the subprocess.
1882 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1883 only if the host matched helo_try_verify_hosts, which caused the
1884 verification to occur when the EHLO/HELO command was issued. The ACL just
1885 tested the remembered result. Now, if a previous verification attempt has
1886 not happened, "verify = helo" does it there and then.
1888 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1890 TK/03 Fix log output including CR from clamd.
1892 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1893 exist provoked a memory error which could cause a segfault.
1895 PH/15 Installed PCRE 6.2
1897 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1899 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1900 of the problem. Specifically, suggested +O2 rather than +O1 for the
1903 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1905 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1906 record, the port was not correctly logged when the outgoing_port log
1907 selector was set (it logged the transort's default port).
1909 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1910 fallback_hosts, and "hosts" in the smtp transport.
1912 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1913 host errors such as "Connection refused".
1915 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1916 authentication with radiusclient 0.4.9:
1918 - Error returned from rc_read_config was caught wrongly
1919 - Username/password not passed on to radius server due to wrong length.
1921 The presumption is that some radiusclient API changes for 4.51/PH/17
1922 were not taken care of correctly. The code is still untested by me (my
1923 Linux distribution still has 0.3.2 of radiusclient), but it was
1924 contributed by a Radius user.
1926 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1927 expanding the "port" option of the smtp transport.
1929 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1930 while reading a MIME header. Thanks to Tom Hughes for a patch.
1932 PH/24 Include config.h inside local_scan.h so that configuration settings are
1935 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1936 that in an ACL for RCPT (for example), you can examine exactly what was
1939 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1940 commands, but it was not correctly comparing the address with the actual
1941 client host address. Thus, it would show the EHLO address in Received:
1942 header lines when this was not necessary.
1944 PH/27 Added the % operator to ${eval:}.
1946 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1947 it should be ignoring failures (because with -C, for example, it has lost
1948 privilege). It wasn't ignoring creation failures other than "already
1951 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1954 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1955 because an input line was too long, either on its own, or by virtue of
1956 too many continuations, the temporary file was not being removed, and the
1957 return code was incorrect.
1959 PH/31 Missing "BOOL" in function definition in filtertest.c.
1961 PH/32 Applied Sieve patches from the maintainer.
1963 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1965 PH/33 Added "verify = not_blind".
1967 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1968 Local/Makefile (with some defaults set). These are used in built scripts
1969 such as exicyclog, but they have never been used in the exim_install
1970 script (though there are many overriding facilities there). I have
1971 arranged that the exim_install script now takes note of these two
1974 PH/35 Installed configuration files for Dragonfly.
1976 PH/36 When a locally submitted message by a trusted user did not contain a
1977 From: header, and the sender address was obtained from -f or from an SMTP
1978 MAIL command, and the trusted user did not use -F to supply a sender
1979 name, $originator_name was incorrectly used when constructing a From:
1980 header. Furthermore, $originator_name was used for submission mode
1981 messages from external hosts without From: headers in a similar way,
1982 which is clearly wrong.
1984 PH/37 Added control=suppress_local_fixups.
1986 PH/38 When log_selector = +received_sender was set, and the addition of the
1987 sender made the log line's construction buffer exactly full, or one byte
1988 less than full, an overflow happened when the terminating "\n" was
1991 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1992 when the result of a list match is failure because a DNS lookup failed.
1994 PH/40 RM_COMMAND is now used in the building process.
1996 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1997 the "build-* directories that it finds.
1999 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2000 address in a domain literal was a prefix of an interface address.
2002 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2003 when verifying a sender address, unless rewrite_headers is false.
2005 PH/44 Wrote a long comment about why errors_to addresses are verified as
2006 recipients, not senders.
2008 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2009 the ratelimit ACL was added.
2011 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2013 PH/46 Added extra information about PostgreSQL errors to the error string.
2015 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2016 avoiding the need to install special zones in a real server. This is
2017 backwards compatible; if it can't find the fake resolver, it drops back.
2018 Thus, both old and new test suites can be run.
2020 TF/02 Added util/ratelimit.pl
2022 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2023 clock is set back in time.
2025 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2026 Candler <B.Candler@pobox.com>.
2028 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2029 OK for addresses that are the result of redirections.
2031 PH/48 A number of further additions for the benefit of the new test suite,
2032 including a fake gethostbyname() that interfaces to the fake DNS resolver
2035 TF/06 The fix for widen_domains has also been applied to qualify_single and
2036 search_parents which are the other dnslookup options that can cause
2039 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2042 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2044 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2045 service" if it encountered an MX record with an empty target hostname.
2046 The message is now "an MX or SRV record indicated no SMTP service".
2048 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2049 if the DNS of the sending site is misconfigured. This is quite a
2050 common situation. This change restores the behaviour of treating a
2051 helo verification defer as a failure.
2053 PH/51 If self=fail was set on a router, the bounce message did not include the
2054 actual error message.
2060 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2062 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2063 command itself ended in error, the underlying message about the transport
2064 filter timeout was being overwritten with the pipe command error. Now the
2065 underlying error message should be appended to the second error message.
2067 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2069 PH/02 Reduce the amount of output that "make" produces by default. Full output
2070 can still be requested.
2072 PH/03 The warning log line about a condition test deferring for a "warn" verb
2073 was being output only once per connection, rather than after each
2074 occurrence (because it was using the same function as for successful
2075 "warn" verbs). This seems wrong, so I have changed it.
2077 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2078 it should not have, which might have caused a crash in the right
2079 circumstances, but probably never did.
2081 PH/04 Installed a modified version of Tony Finch's patch to make submission
2082 mode fix the return path as well as the Sender: header line, and to
2083 add a /name= option so that you can make the user's friendly name appear
2086 TF/03 Added the control = fakedefer ACL modifier.
2088 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2089 Mark Lowes for thorough testing.
2091 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2093 TK/03 Merged latest SRS patch from Miles Wilton.
2095 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2096 with the definition in sysexits.h (which is #included earlier).
2097 Fortunately, Exim does not actually use EX_OK. The code used to try to
2098 preserve the sysexits.h value, by assumimg that macro definitions were
2099 scanned for macro replacements. I have been disabused of this notion,
2100 so now the code just undefines EX_OK before #including unistd.h.
2102 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2103 in the smtp transport. When a block could not be written in a single
2104 write() function, the timeout was being re-applied to each part-write.
2105 This seems wrong - if the receiver was accepting one byte at a time it
2106 would take for ever. The timeout is now adjusted when this happens. It
2107 doesn't have to be particularly precise.
2109 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2110 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2112 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2113 without a domain if the check to <postmaster@domain> fails.
2115 SC/01 Eximstats: added -xls and the ability to specify output files
2116 (patch written by Frank Heydlauf).
2118 SC/02 Eximstats: use FileHandles for outputing results.
2120 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2122 SC/04 Eximstats: fixed display of large numbers with -nvr option
2124 SC/05 Eximstats: fixed merging of reports with empty tables.
2126 SC/06 Eximstats: added the -include_original_destination flag
2128 SC/07 Eximstats: removed tabs and trailing whitespace.
2130 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2132 TK/06 MBOX spool code: Add real "From " MBOX separator line
2133 so the .eml file is really in mbox format (even though
2134 most programs do not really care). Patch from Alex Miller.
2136 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2137 The latter is generated from $received_to and is only set if the
2138 message has one envelope recipient. SA can use these headers,
2139 obviously out-of-the-box. Patch from Alex Miller.
2141 PH/08 The ${def test on a variable was returning false if the variable's
2142 value was "0", contrary to what the specification has always said!
2143 The result should be true unless the variable is empty.
2145 PH/09 The syntax error of a character other than { following "${if
2146 def:variable_name" (after optional whitespace) was not being diagnosed.
2147 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2148 accidental colon was present, for example, could give incorrect results.
2150 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2151 result is used (not including appendfile, where other changes are about
2154 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2155 This involved changing a lot of size variables from int to off_t. It
2156 should work with maildirs and everything.
2158 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2159 spamd dying while we are connected to it.
2161 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2164 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2165 function for BDB 4.3.
2167 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2169 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2170 the sources for PCRE have been re-arranged and more files are now
2173 PH/15 The code I had for printing potentially long long variables in PH/11
2174 above was not the best (it lost precision). The length of off_t variables
2175 is now inspected at build time, and an appropriate printing format (%ld
2176 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2177 to be "long long int" or "long int". This is needed for the internal
2178 formatting function string_vformat().
2180 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2181 the configuration file to be ":syslog", then the script "guesses" where
2182 the logs files are, rather than using the compiled in default. In our
2183 case the guess is not the same as the compiled default, so the script
2184 suddenly stopped working when I started to use syslog. The patch checks
2185 to see if log_file_path is "". If so, it attempts to read it from exim
2186 with no configuration file to get the compiled in version, before it
2187 falls back to the previous guessing code."
2189 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2190 implementing BATV in an Exim configuration. See NewStuff for the gory
2193 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2194 Makefile that are specific to HP-UX.
2196 PH/18 If the "use_postmaster" option was set for a recipient callout together
2197 with the "random" option, the postmaster address was used as the MAIL
2198 FROM address for the random test, but not for the subsequent recipient
2199 test. It is now used for both.
2201 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2202 patch removes a few documentation additions to RFC 3028, because the
2203 latest draft now contains them. It adds the new en;ascii-case comparator
2204 and a new error check for 8bit text in MIME parts. Comparator and
2205 require names are now matched exactly. I enabled the subaddress
2206 extension, but it is not well tested yet (read: it works for me)."
2208 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2209 rework some of the code of TK/09 above to avoid the hardwired use of
2210 "%lld" and "long long". Replaced the call to snprintf() with a call to
2213 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2214 records point to non-existent hosts", "retry timeout exceeded", and
2215 "retry time not reached for any host after a long failure period".
2217 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2218 experimental DomainKeys support:
2220 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2221 (2) On an error such as an illegally used "control", the wrong name for
2222 the control was given.
2224 These problems did NOT occur unless DomainKeys support was compiled.
2226 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2228 PH/24 Added ${if match_ip condition.
2230 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2231 databases so that it will be absolutely obvious if a crash occurs in the
2232 DB library. This is a regular occurrence (often caused by mis-matched
2235 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2236 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2237 picked up on a user's system that detects such things. There doesn't seem
2238 to be a gcc warning option for this - only an attribute that has to be
2239 put on the function's prototype. It seems that in Fedora Core 4 they have
2240 set this on a number of new functions. No doubt there will be more in due
2243 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2244 specify a transport. However, if an address that was verified by such a
2245 router was the subject of a callout, Exim crashed because it tried to
2246 read the rcpt_include_affixes from the non-existent transport. Now it
2247 just assumes that the setting of that option is false. This bug was
2248 introduced by 4.51/PH/31.
2250 PH/28 Changed -d+all to exclude +memory, because that information is very
2251 rarely of interest, but it makes the output a lot bigger. People tend to
2252 do -d+all out of habit.
2254 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2255 code in os-type was giving problems when libc.so lives in lib64, like on
2258 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2259 aren't the modern standard, and it seems that some systems' include files
2260 don't always have them. Exim was already checking for some of the newer
2261 ones like T_AAAA, and defining it itself. I've added checks for all the
2262 record types that Exim uses.
2264 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2265 not automatically generating a new one, as it is supposed to. This
2266 prevented TLS from working. If the file did exist, but contained invalid
2267 data, a new version was generated, as expected. It was only the case of a
2268 non-existent file that was broken.
2270 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2271 with a change in libdomainkeys > 0.64.
2273 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2274 from DNS. If the selector record carries the flag, it now has
2275 precedence over the domain-wide flag.
2277 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2279 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2280 the use of a port name that isn't defined in /etc/services) occurred, the
2281 message was deferred as in a normal delivery, and thus remained on the
2282 spool, instead of being failed because of the mua_wrapper setting. This
2283 is now fixed, and I tidied up some of the mua_wrapper messages at the
2286 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2287 the messages in a hash of arrays rather than using individual hashes.
2288 This is a bit cleaner and results in dramatic memory savings, albeit
2289 at a slight CPU cost.
2291 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2292 as requested by Marc Sherman.
2294 SC/10 Eximstats: added histograms for user specified patterns as requested
2297 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2299 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2300 fopen() in the content-scanning modules that did not already have it.
2306 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2307 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2309 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2311 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2313 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2314 to test Sieve filters that use "vacation".
2316 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2317 that changes the way the GnuTLS parameters are stored in the cache file.
2318 The new format can be generated externally. For backward compatibility,
2319 if the data in the cache doesn't make sense, Exim assumes it has read an
2320 old-format file, and it generates new data and writes a new file. This
2321 means that you can't go back to an older release without removing the
2324 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2325 work if there are any delivery delays because "one_time" forces the
2326 parent to be marked "delivered", so its unseen clone is never tried
2327 again. For this reason, Exim now forbids the simultaneous setting of
2330 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2331 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2332 entry if you want to know the details. The fix, however, neglected to
2333 consider the case when local delivery batching is involved. The test for
2334 "previously delivered" was not happening when checking to see if an
2335 address could be batched with a previous (undelivered) one; under
2336 certain circumstances this could lead to multiple deliveries to the same
2339 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2340 in its include files, and this causes problems building Exim.
2342 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2343 header_syntax) but Exim was just ignoring anything given after a slash.
2344 In particular, this caused confusion with an attempt to use "verify =
2345 reverse_host_lookup/defer_ok". An error is now given when options are
2346 supplied for verify items that do not have them. (Maybe reverse_host_
2347 lookup should have a defer_ok option, but that's a different point.)
2349 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2350 defined by RFC 821) to 2048, because there were problems with some AUTH
2351 commands, and RFC 1869 says the size should be increased for extended
2352 SMTP commands that take arguments.
2354 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2357 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2358 "unknown" error; now it says that the functionality isn't in the binary.
2360 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2361 an address' error message when a string expansion fails (syntax or
2362 whatever). Otherwise the password may appear in the log. Following change
2363 PH/42 below, there is no longer a chance of it appearing in a bounce
2366 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2368 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2369 of its addresses was ever tried. (Bugzilla bug #2.)
2371 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2372 the result incorrectly in the debug output. (It correctly added a newline
2373 to what was transported.)
2375 TF/01 Added $received_time.
2377 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2378 commented out examples of how to interface to a virus scanner and to
2379 SpamAssassin. Also added commented examples of av_scanner and
2380 spamd_address settings.
2382 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2383 and controls are allowed in which ACLs. There were a couple of minor
2384 errors. Some of the entries in the conditions table (which is a table of
2385 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2386 negation of where the condition IS allowed.
2388 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2390 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2391 header file does not have a version number, so I've had to invent a new
2392 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2393 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2394 radiusclient), but it was contributed by a Radius user.
2396 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2397 files or directories, for OpenSSL.
2399 PH/19 When an Exim process that is running as root has to create an Exim log
2400 file, it does so in a subprocess that runs as exim:exim so as to get the
2401 ownership right at creation (otherwise, other Exim processes might see
2402 the file with the wrong ownership). There was no test for failure of this
2403 fork() call, which would lead to the process getting stuck as it waited
2404 for a non-existent subprocess. Forks do occasionally fail when resources
2405 run out. I reviewed all the other calls to fork(); they all seem to check
2408 PH/20 When checking for unexpected SMTP input at connect time (before writing
2409 the banner), Exim was not dealing correctly with a non-positive return
2410 from the read() function. If the client had disconnected by this time,
2411 the result was a log entry for a synchronization error with an empty
2412 string after "input=" when read() returned zero. If read() returned -1
2413 (an event I could not check), uninitialized data bytes were printed.
2414 There were reports of junk text (parts of files, etc) appearing after
2417 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2419 PH/22 Added support for macro redefinition, and (re)definition in between
2420 driver and ACL definitions.
2422 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2423 forgetting to use the resulting value; it was using the unexpanded value.
2425 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2426 hadn't been configured. The fix is from Juergen Kreileder, who
2427 understands it better than I do:
2429 "Here's what I see happening with three configured cyrus_sasl
2430 authenticators configured (plain, login, cram-md5):
2432 On startup auth_cyrus_sasl_init() gets called for each of these.
2433 This means three calls to sasl_listmech() without a specified mech_list.
2434 => SASL tests which mechs of all available mechs actually work
2435 => three warnings about OTP not working
2436 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2438 With the patch, sasl_listmech() also gets called three times. But now
2439 SASL's mech_list option is set to the server_mech specified in the the
2440 authenticator. Or in other words, the answer from sasl_listmech()
2441 gets limited to just the mech you're testing for (which is different
2443 => the return list contains just 'plain' or 'login', 'cram-md5' or
2444 nothing depending on the value of ob->server_mech.
2446 I've just tested the patch: Authentication still works fine,
2447 unavailable mechs specified in the exim configuration are still
2448 caught, and the auth.log warnings about OTP are gone."
2450 PH/25 When debugging is enabled, the contents of the command line are added
2451 to the debugging output, even when log_selector=+arguments is not
2454 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2455 answer is "GNU", and only if the return is "GNU/something" is the answer
2458 PH/27 $acl_verify_message is now set immediately after the failure of a
2459 verification in an ACL, and so is available in subsequent modifiers. In
2460 particular, the message can be preserved by coding like this:
2462 warn !verify = sender
2463 set acl_m0 = $acl_verify_message
2465 Previously, $acl_verify_message was set only while expanding "message"
2466 and "log_message" when a very denied access.
2468 PH/28 Modified OS/os.c-Linux with
2470 -#ifndef OS_LOAD_AVERAGE
2471 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2473 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2474 nomenclature these days.)
2476 PH/29 Installed patch from the Sieve maintainer that adds the options
2477 sieve_useraddress and sieve_subaddress to the redirect router.
2479 PH/30 In these circumstances:
2480 . Two addresses routed to the same list of hosts;
2481 . First host does not offer TLS;
2482 . First host accepts first address;
2483 . First host gives temporary error to second address;
2484 . Second host offers TLS and a TLS session is established;
2485 . Second host accepts second address.
2486 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2487 and peerdn, if requested) that were in fact used only for the second
2490 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2491 attention to any local part prefix or suffix that was matched by the
2492 router that accepted the address. It now behaves in the same way as it
2493 does for delivery: the affixes are removed from the local part unless
2494 rcpt_include_affixes is set on the transport.
2496 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2497 timeout during the DATA phase of an incoming message.
2499 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2500 applied a patch sanctioned by the Sieve maintainer.
2502 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2503 the uid or gid is negative. A case of a negative gid caused this to be
2504 noticed. The fix allows for either to be negative.
2506 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2507 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2510 PH/36 The change PH/12 above was broken. Fixed it.
2512 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2513 the grounds that routing the same address twice would always produce the
2514 same answer. This might have been true once, but it is certainly no
2515 longer true now. Routing a child address may depend on the previous
2516 routing that produced that child. Some complicated redirection strategies
2517 went wrong when messages had multiple recipients, and made Exim's
2518 behaviour dependent on the order in which the addresses were given.
2520 I have moved the duplicate checking until after the routing is complete.
2521 Exim scans the addresses that are assigned to local and remote
2522 transports, and removes any duplicates. This means that more work will be
2523 done, as duplicates will always all be routed, but duplicates are
2524 presumably rare, so I don't expect this is of any significance.
2526 For deliveries to pipes, files, and autoreplies, the duplicate checking
2527 still happens during the routing process, since they are not going to be
2530 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2531 It corrects a timeout issue with spamd. This is Ian's comment: "The
2532 background is that sometimes spamd either never reads data from a
2533 connection it has accepted, or it never writes response data. The exiscan
2534 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2535 blindly assumes that writes won't block so it may never time out."
2537 PH/39 Allow G after quota size as well as K and M.
2539 PH/40 The value set for $authenticated_id in an authenticator may not contain
2540 binary zeroes or newlines because the value is written to log lines and
2541 to spool files. There was no check on this. Now the value is run through
2542 the string_printing() function so that such characters are converted to
2543 printable escape sequences.
2545 PH/41 $message_linecount is a new variable that contains the total number of
2546 lines in the message. Compare $body_linecount, which is the count for the
2549 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2550 bounce and delay warning messages, except in certain special cases, which
2553 (a) An SMTP error message from a remote host;
2554 (b) A message specified in a :fail: redirection;
2555 (c) A message specified in a "fail" command in a system filter;
2556 (d) A message specified in a FAIL return from the queryprogram router;
2557 (e) A message specified by the cannot_route_message router option.
2559 In these cases only, Exim does include the error details in bounce and
2560 warning messages. There are also a few cases where bland messages such
2561 as "unrouteable address" or "local delivery error" are given.
2563 PH/43 $value is now also set for the "else" part of a ${run expansion.
2565 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2566 being worked on, but at least Exim now implements the latest version to
2569 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2570 process to complete was treated as a delivery failure, a timeout while
2571 writing the message to the pipe was logged, but erroneously treated as a
2572 successful delivery. Such timeouts include transport filter timeouts. For
2573 consistency with the overall process timeout, these timeouts are now
2574 treated as errors, giving rise to delivery failures by default. However,
2575 there is now a new Boolean option for the pipe transport called
2576 timeout_defer, which, if set TRUE, converts the failures into defers for
2577 both kinds of timeout. A transport filter timeout is now identified in
2580 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2581 systems where "make" and "gmake" are different, calling "gmake" at top
2582 level broke things. I've arranged for the value of $(MAKE) to be passed
2583 from the Makefile to this script so that it can call the same version of
2587 A note about Exim versions 4.44 and 4.50
2588 ----------------------------------------
2590 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2591 changes of various kinds. As a consequence, a big documentation update was
2592 needed. This delayed the release for rather longer than seemed good, especially
2593 in the light of a couple of (minor) security issues. Therefore, the changes
2594 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2595 release. So 4.44 and 4.50 are in effect two different branches that both start
2598 I have left the 4.50 change log unchanged; it contains all the changes since
2599 4.43. The change log for 4.44 is below; many of its items are identical to
2600 those for 4.50. This seems to be the most sensible way to preserve the
2601 historical information.
2607 1. Minor wording change to the doc/README.SIEVE file.
2609 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2610 computation of the current number of files was incorrect.
2612 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2613 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2616 4. Give more explanation in the error message when the command for a transport
2617 filter fails to execute.
2619 5. There are several places where Exim runs a non-Exim command in a
2620 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2621 was being done only for the command run by the queryprogram router. It is
2622 now done for all such subprocesses. The other cases are: ${run, transport
2623 filters, and the commands run by the lmtp and pipe transports.
2625 6. Added CONFIGURE_GROUP build-time option.
2627 7. Some older OS have a limit of 256 on the maximum number of file
2628 descriptors. Exim was using setrlimit() to set 1000 as a large value
2629 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2630 systems. I've change it so that if it can't get 1000, it tries for 256.
2632 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2633 was an oversight, and furthermore, ever since the addition of extra
2634 controls (e.g. 4.43/32), the checks on when to allow different forms of
2635 "control" were broken. There should now be diagnostics for all cases when a
2636 control that does not make sense is encountered.
2638 9. Added the /retain_sender option to "control=submission".
2640 10. $recipients is now available in the predata ACL (oversight).
2642 11. Tidy the search cache before the fork to do a delivery from a message
2643 received from the command line. Otherwise the child will trigger a lookup
2644 failure and thereby defer the delivery if it tries to use (for example) a
2645 cached ldap connection that the parent has called unbind on.
2647 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2648 of $address_data from the recipient verification was clobbered by the
2649 sender verification.
2651 13. The value of address_data from a sender verification is now available in
2652 $sender_address_data in subsequent conditions in the ACL statement.
2654 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2656 15. Added a new option "connect=<time>" to callout options, to set a different
2659 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2660 was its contents. (It was OK if the option was not defined at all.)
2662 17. A "Completed" log line is now written for messages that are removed from
2663 the spool by the -Mrm option.
2665 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2666 information about exactly what failed.
2668 19. Added -dd to debug only the daemon process.
2670 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2671 handles timeouts, both on the server side and network timeouts. Renamed the
2672 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2674 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2675 It is now set to "smtps".
2677 22. $host_address is now set to the target address during the checking of
2678 ignore_target_hosts.
2680 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2681 being passed; this would have caused $sender_host_name to have been used if
2682 matching the list had actually called for a host name (not very likely,
2683 since this list is usually IP addresses). A host name is now passed as
2686 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2687 code that specifies a non-restarting handler (typically sigaction() in
2688 modern systems) in an attempt to fix a rare and obscure crash bug.
2690 25. Narrowed the window for a race in the daemon that could cause it to ignore
2691 SIGCHLD signals. This is not a major problem, because they are used only to
2692 wake it up if nothing else does.
2694 26. A malformed maildirsize file could cause Exim to calculate negative values
2695 for the mailbox size or file count. Odd effects could occur as a result.
2696 The maildirsize information is now recalculated if the size or filecount
2699 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2700 support for a long time. Removed HAVE_SYS_VFS_H.
2702 28. Installed the latest version of exipick from John Jetmore.
2704 29. In an address list, if the pattern was not a regular expression, an empty
2705 subject address (from a bounce message) matched only if the pattern was an
2706 empty string. Non-empty patterns were not even tested. This was the wrong
2707 because it is perfectly reasonable to use an empty address as part of a
2708 database query. An empty address is now tested by patterns that are
2709 lookups. However, all the other forms of pattern expect the subject to
2710 contain a local part and a domain, and therefore, for them, an empty
2711 address still always fails if the pattern is not itself empty.
2713 30. Exim went into a mad DNS loop when attempting to do a callout where the
2714 host was specified on an smtp transport, and looking it up yielded more
2715 than one IP address.
2717 31. Re-factored the code for checking spool and log partition space into a
2718 function that finds that data and another that does the check. The former
2719 is then used to implement four new variables: $spool_space, $log_space,
2720 $spool_inodes, and $log_inodes.
2722 32. The RFC2047 encoding function was originally intended for short strings
2723 such as real names; it was not keeping to the 75-character limit for
2724 encoded words that the RFC imposes. It now respects the limit, and
2725 generates multiple encoded words if necessary. To be on the safe side, I
2726 have increased the buffer size for the ${rfc2047: expansion operator from
2729 33. It is now permitted to omit both strings after an "if" condition; if the
2730 condition is true, the result is "true". As before, when the second string
2731 is omitted, a false condition yields an empty string. This makes it less
2732 cumbersome to write custom ACL and router conditions.
2734 34. Failure to deliver a bounce message always caused it to be frozen, even if
2735 there was an errors_to setting on the router. The errors_to setting is now
2738 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2739 canonical form (fully expanded) before being placed in
2740 $sender_host_address.
2742 36. The table in the code that translates DNS record types into text (T_A to
2743 "A" for instance) was missing entries for NS and CNAME. It is just possible
2744 that this could have caused confusion if both these types were looked up
2745 for the same domain, because the text type is used as part of Exim's
2746 per-process caching. But the chance of anyone hitting this buglet seems
2749 37. The dnsdb lookup has been extended in a number of ways.
2751 (1) There is a new type, "zns", which walks up the domain tree until it
2752 finds some nameserver records. It should be used with care.
2754 (2) There is a new type, "mxh", which is like "mx" except that it returns
2755 just the host names, not the priorities.
2757 (3) It is now possible to give a list of domains (or IP addresses) to be
2758 looked up. The behaviour when one of the lookups defers can be
2759 controlled by a keyword.
2761 (4) It is now possible to specify the separator character for use when
2762 multiple records are returned.
2764 38. The dnslists ACL condition has been extended: it is now possible to supply
2765 a list of IP addresses and/or domains to be looked up in a particular DNS
2768 39. Added log_selector=+queue_time_overall.
2770 40. When running the queue in the test harness, wait just a tad after forking a
2771 delivery process, to get repeatability of debugging output.
2773 41. Include certificate and key file names in error message when GnuTLS fails
2774 to set them up, because the GnuTLS error message doesn't include the name
2775 of the failing file when there is a problem reading it.
2777 42. Allow both -bf and -bF in the same test run.
2779 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2781 44. The "Exiscan patch" is now merged into the mainline Exim source.
2783 45. Sometimes the final signoff response after QUIT could fail to get
2784 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2785 < 0 before doing a fflush(). This bug looks as though it goes back to the
2786 introduction of TLS in release 3.20, but "sometimes" must have been rare
2787 because the tests only now provoked it.
2789 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2790 (this can affect the format of dates).
2792 47. exim_tidydb, when checking for the continued existence of a message for
2793 which it has found a message-specific retry record, was not finding
2794 messages that were in split spool directories. Consequently, it was
2795 deleting retry records that should have stayed in existence.
2797 48. Steve fixed some bugs in eximstats.
2799 49. The SPA authentication driver was not abandoning authentication and moving
2800 on to the next authenticator when an expansion was forced to fail,
2801 contradicting the general specification for all authenticators. Instead it
2802 was generating a temporary error. It now behaves as specified.
2804 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2805 (the order specifies the preference for clients). The order is now AES256,
2806 AES128, 3DES, ARCFOUR128.
2808 51. Small patch to Sieve code - explicitly set From: when generating an
2811 52. Exim crashed if a remote delivery caused a very long error message to be
2812 recorded - for instance if somebody sent an entire SpamAssassin report back
2813 as a large number of 550 error lines. This bug was coincidentally fixed by
2814 increasing the size of one of Exim's internal buffers (big_buffer) that
2815 happened as part of the Exiscan merge. However, to be on the safe side, I
2816 have made the code more robust (and fixed the comments that describe what
2819 53. Now that there can be additional text after "Completed" in log lines (if
2820 the queue_time_overall log selector is set), a one-byte patch to exigrep
2821 was needed to allow it to recognize "Completed" as not the last thing in
2824 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2825 patch that reportedly fixes this has been added. I am not expert enough to
2826 create a test for it. This is what the patch creator wrote:
2828 "I found a little strange behaviour of ldap code when working with
2829 Windows 2003 AD Domain, where users was placed in more than one
2830 Organization Units. When I tried to give exim partial DN, the exit code
2831 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2832 But simultaneously result of request was absolutely normal ldap result,
2833 so I produce this patch..."
2835 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2836 REFERENCE, so I have modified the code to exclude the patch when that macro
2839 55. Some experimental protocols are using DNS PTR records for new purposes. The
2840 keys for these records are domain names, not reversed IP addresses. The
2841 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2842 leaves it alone. Component reversal etc. now happens only for IP addresses.
2845 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2847 57. Double the size of the debug message buffer (to 2048) so that more of very
2848 long debug lines gets shown.
2850 58. The exicyclog utility now does better if the number of log files to keep
2851 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2853 59. Two changes related to the smtp_active_hostname option:
2855 (1) $smtp_active_hostname is now available as a variable.
2856 (2) The default for smtp_banner uses $smtp_active_hostname instead
2857 of $primary_hostname.
2859 60. The host_aton() function is supposed to be passed a string that is known
2860 to be a valid IP address. However, in the case of IPv6 addresses, it was
2861 not checking this. This is a hostage to fortune. Exim now panics and dies
2862 if the condition is not met. A case was found where this could be provoked
2863 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2864 components; fortuitously, this particular loophole had already been fixed
2865 by change 4.50/55 above.
2867 If there are any other similar loopholes, the new check in host_aton()
2868 itself should stop them being exploited. The report I received stated that
2869 data on the command line could provoke the exploit when Exim was running as
2870 exim, but did not say which command line option was involved. All I could
2871 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2872 running as the user.
2875 61. There was a buffer overflow vulnerability in the SPA authentication code
2876 (which came originally from the Samba project). I have added a test to the
2877 spa_base64_to_bits() function which I hope fixes it.
2880 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2881 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2883 63. The daemon start-up calls getloadavg() while still root for those OS that
2884 need the first call to be done as root, but it missed one case: when
2885 deliver_queue_load_max is set with deliver_drop_privilege. This is
2886 necessary for the benefit of the queue runner, because there is no re-exec
2887 when deliver_drop_privilege is set.
2889 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2890 This has been fixed.
2892 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2893 was in use, was not putting the data itself into the right store pool;
2894 consequently, it could be overwritten for a subsequent message in the same
2895 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2898 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2900 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2901 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2902 the function were treating the return as a boolean value, which happened to
2903 work because 0=false and not-0=true, but is not correct code.
2905 68. The host_aton() function was not handling scoped IPv6 addresses (those
2906 with, for example, "%eth0" on the end) correctly.
2908 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2909 negated items (that is, ~something) in unsigned ints. Some compilers
2910 apparently mutter when there is no cast.
2912 70. If an address verification called from an ACL failed, and did not produce a
2913 user-specific message (i.e. there was only a "system" message), nothing was
2914 put in $acl_verify_message. In this situation, it now puts the system
2917 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2918 session; change 4.31/43 added the unwanted input to the log line - except
2919 that it did not do this in the start of session case. It now does.
2921 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2922 This is wrong and can cause the other end to generate a synchronization
2923 error if it is another Exim or anything else that does the synchronization
2924 check. A QUIT command is no longer sent after a timeout.
2926 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2927 during host lookups.
2929 74. The defer_ok option of callout verification was not working if it was used
2930 when verifying addresses in header lines, that is, for this case:
2932 verify = header_sender/callout=defer_ok
2934 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2935 those file descriptors could be used for SMTP connections. If anything
2936 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2937 could be sent to the SMTP client, causing chaos. The daemon now opens
2938 stdin, stdout, and stderr to /dev/null when it puts itself into the
2941 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2942 log by default. The user can override this with suitable Perl magic.
2944 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2945 the log message when discard triggers, was not working for the DATA ACL or
2946 for the non-SMTP ACL.
2948 78. Error message wording change in sieve.c.
2950 79. If smtp_accept_max_per_host was set, the number of connections could be
2951 restricted to fewer than expected, because the daemon was trying to set up
2952 a new connection before checking whether the processes handling previous
2953 connections had finished. The check for completed processes is now done
2954 earlier. On busy systems, this bug wouldn't be noticed because something
2955 else would have woken the daemon, and it would have reaped the completed
2958 80. If a message was submitted locally by a user whose login name contained one
2959 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2960 It caused a spool format error. I have fixed the spool reading code. A
2961 related problem was that the "from" clause in the Received: line became
2962 illegal because of the space(s). It is now covered by ${quote_local_part.
2964 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2967 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2969 83. Patch from Sieve maintainer to fix unterminated string problem in
2970 "vacation" handling.
2972 84. Some minor changes to the Linux configuration files to help with other
2973 OS variants using glibc.
2975 85. One more patch for Sieve to update vacation handling to latest spec.
2978 ----------------------------------------------------
2979 See the note above about the 4.44 and 4.50 releases.
2980 ----------------------------------------------------
2986 1. Change 4.43/35 introduced a bug that caused file counts to be
2987 incorrectly computed when quota_filecount was set in an appendfile
2990 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2991 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2994 3. Give more explanation in the error message when the command for a transport
2995 filter fails to execute.
2997 4. There are several places where Exim runs a non-Exim command in a
2998 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2999 was being done only for the command run by the queryprogram router. It is
3000 now done for all such subprocesses. The other cases are: ${run, transport
3001 filters, and the commands run by the lmtp and pipe transports.
3003 5. Some older OS have a limit of 256 on the maximum number of file
3004 descriptors. Exim was using setrlimit() to set 1000 as a large value
3005 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3006 systems. I've change it so that if it can't get 1000, it tries for 256.
3008 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3009 was an oversight, and furthermore, ever since the addition of extra
3010 controls (e.g. 4.43/32), the checks on when to allow different forms of
3011 "control" were broken. There should now be diagnostics for all cases when a
3012 control that does not make sense is encountered.
3014 7. $recipients is now available in the predata ACL (oversight).
3016 8. Tidy the search cache before the fork to do a delivery from a message
3017 received from the command line. Otherwise the child will trigger a lookup
3018 failure and thereby defer the delivery if it tries to use (for example) a
3019 cached ldap connection that the parent has called unbind on.
3021 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3022 of $address_data from the recipient verification was clobbered by the
3023 sender verification.
3025 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3026 was its contents. (It was OK if the option was not defined at all.)
3028 11. A "Completed" log line is now written for messages that are removed from
3029 the spool by the -Mrm option.
3031 12. $host_address is now set to the target address during the checking of
3032 ignore_target_hosts.
3034 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3035 being passed; this would have caused $sender_host_name to have been used if
3036 matching the list had actually called for a host name (not very likely,
3037 since this list is usually IP addresses). A host name is now passed as
3040 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3041 code that specifies a non-restarting handler (typically sigaction() in
3042 modern systems) in an attempt to fix a rare and obscure crash bug.
3044 15. Narrowed the window for a race in the daemon that could cause it to ignore
3045 SIGCHLD signals. This is not a major problem, because they are used only to
3046 wake it up if nothing else does.
3048 16. A malformed maildirsize file could cause Exim to calculate negative values
3049 for the mailbox size or file count. Odd effects could occur as a result.
3050 The maildirsize information is now recalculated if the size or filecount
3053 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3054 support for a long time. Removed HAVE_SYS_VFS_H.
3056 18. Updated exipick to current release from John Jetmore.
3058 19. Allow an empty sender to be matched against a lookup in an address list.
3059 Previously the only cases considered were a regular expression, or an
3062 20. Exim went into a mad DNS lookup loop when doing a callout where the
3063 host was specified on the transport, if the DNS lookup yielded more than
3066 21. The RFC2047 encoding function was originally intended for short strings
3067 such as real names; it was not keeping to the 75-character limit for
3068 encoded words that the RFC imposes. It now respects the limit, and
3069 generates multiple encoded words if necessary. To be on the safe side, I
3070 have increased the buffer size for the ${rfc2047: expansion operator from
3073 22. Failure to deliver a bounce message always caused it to be frozen, even if
3074 there was an errors_to setting on the router. The errors_to setting is now
3077 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3078 canonical form (fully expanded) before being placed in
3079 $sender_host_address.
3081 24. Updated eximstats to version 1.33
3083 25. Include certificate and key file names in error message when GnuTLS fails
3084 to set them up, because the GnuTLS error message doesn't include the name
3085 of the failing file when there is a problem reading it.
3087 26. Expand error message when OpenSSL has problems setting up cert/key files.
3090 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3091 (this can affect the format of dates).
3093 28. exim_tidydb, when checking for the continued existence of a message for
3094 which it has found a message-specific retry record, was not finding
3095 messages that were in split spool directories. Consequently, it was
3096 deleting retry records that should have stayed in existence.
3098 29. eximstats updated to version 1.35
3099 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3100 1.35 - bugfix such that pie charts by volume are generated correctly
3102 30. The SPA authentication driver was not abandoning authentication and moving
3103 on to the next authenticator when an expansion was forced to fail,
3104 contradicting the general specification for all authenticators. Instead it
3105 was generating a temporary error. It now behaves as specified.
3107 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3108 (the order specifies the preference for clients). The order is now AES256,
3109 AES128, 3DES, ARCFOUR128.
3111 31. Small patch to Sieve code - explicitly set From: when generating an
3114 32. Exim crashed if a remote delivery caused a very long error message to be
3115 recorded - for instance if somebody sent an entire SpamAssassin report back
3116 as a large number of 550 error lines. This bug was coincidentally fixed by
3117 increasing the size of one of Exim's internal buffers (big_buffer) that
3118 happened as part of the Exiscan merge. However, to be on the safe side, I
3119 have made the code more robust (and fixed the comments that describe what
3122 33. Some experimental protocols are using DNS PTR records for new purposes. The
3123 keys for these records are domain names, not reversed IP addresses. The
3124 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3125 leaves it alone. Component reversal etc. now happens only for IP addresses.
3128 34. The host_aton() function is supposed to be passed a string that is known
3129 to be a valid IP address. However, in the case of IPv6 addresses, it was
3130 not checking this. This is a hostage to fortune. Exim now panics and dies
3131 if the condition is not met. A case was found where this could be provoked
3132 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3133 components; fortuitously, this particular loophole had already been fixed
3134 by change 4.50/55 or 4.44/33 above.
3136 If there are any other similar loopholes, the new check in host_aton()
3137 itself should stop them being exploited. The report I received stated that
3138 data on the command line could provoke the exploit when Exim was running as
3139 exim, but did not say which command line option was involved. All I could
3140 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3141 running as the user.
3144 35. There was a buffer overflow vulnerability in the SPA authentication code
3145 (which came originally from the Samba project). I have added a test to the
3146 spa_base64_to_bits() function which I hope fixes it.
3149 36. The daemon start-up calls getloadavg() while still root for those OS that
3150 need the first call to be done as root, but it missed one case: when
3151 deliver_queue_load_max is set with deliver_drop_privilege. This is
3152 necessary for the benefit of the queue runner, because there is no re-exec
3153 when deliver_drop_privilege is set.
3155 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3156 was in use, was not putting the data itself into the right store pool;
3157 consequently, it could be overwritten for a subsequent message in the same
3158 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3161 38. Sometimes the final signoff response after QUIT could fail to get
3162 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3163 < 0 before doing a fflush(). This bug looks as though it goes back to the
3164 introduction of TLS in release 3.20, but "sometimes" must have been rare
3165 because the tests only now provoked it.
3171 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3172 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3173 Now it returns an integer. A number of calls were still expecting a T/F
3174 return. Fortuitously, in all cases, the tests worked in OK situations,
3175 which is the norm. However, things would have gone wrong on any write
3176 failures on the smtp file descriptor. This function is used when sending
3177 messages over SMTP and also when doing verify callouts.
3179 2. When Exim is called to do synchronous delivery of a locally submitted
3180 message (the -odf or -odi options), it no longer closes stderr before doing
3183 3. Implemented the mua_wrapper option.
3185 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3187 5. Implemented the functions header_remove(), header_testname(),
3188 header_add_at_position(), and receive_remove_recipient(), and exported them
3191 6. If an ACL "warn" statement specified the addition of headers, Exim already
3192 inserted X-ACL-Warn: at the start if there was no header name. However, it
3193 was not making this test for the second and subsequent header lines if
3194 there were newlines in the string. This meant that an invalid header could
3195 be inserted if Exim was badly configured.
3197 7. Allow an ACL "warn" statement to add header lines at the start or after all
3198 the Received: headers, as well as at the end.
3200 8. Added the rcpt_4xx retry error code.
3202 9. Added postmaster_mailfrom=xxx to callout verification option.
3204 10. Added mailfrom=xxxx to the callout verification option, for verify=
3207 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3208 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3210 12. Inserted some casts to stop certain compilers warning when using pointer
3211 differences as field lengths or precisions in printf-type calls (mostly
3212 affecting debugging statements).
3214 13. Added optional readline() support for -be (dynamically loaded).
3216 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3217 same clock tick as a message's arrival, so that its received time was the
3218 same as the "first fail" time on the retry record, and that message
3219 remained on the queue past the ultimate address timeout, every queue runner
3220 would try a delivery (because it was past the ultimate address timeout) but
3221 after another failure, the ultimate address timeout, which should have then
3222 bounced the address, did not kick in. This was a "< instead of <=" error;
3223 in most cases the first failure would have been in the next clock tick
3224 after the received time, and all would be well.
3226 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3227 being recognized when the domain list was tested by the match_domain
3228 condition in an expansion string.
3230 16. Added the ${str2b64: operator.
3232 17. Exim was always calling setrlimit() to set a large limit for the number of
3233 processes, without checking whether the existing limit was already
3234 adequate. (It did check for the limit on file descriptors.) Furthermore,
3235 errors from getrlimit() and setrlimit() were being ignored. Now they are
3236 logged to the main and panic logs, but Exim does carry on, to try to do its
3237 job under whatever limits there are.
3239 18. Imported PCRE 5.0.
3241 19. Trivial typo in log message " temporarily refused connection" (the leading
3244 20. If the log selector return_path_on_delivery was set and an address was
3245 redirected to /dev/null, the delivery process crashed because it assumed
3246 that a return path would always be set for a "successful" delivery. In this
3247 case, the whole delivery is bypassed as an optimization, and therefore no
3250 21. Internal re-arrangement: the function for sending a challenge and reading
3251 a response while authentication was assuming a zero-terminated challenge
3252 string. It's now changed to take a pointer and a length, to allow for
3253 binary data in such strings.
3255 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3257 23. Exim was not respecting finduser_retries when seeking the login of the
3258 uid under which it was called; it was always trying 10 times. (The default
3259 setting of finduser_retries is zero.) Also, it was sleeping after the final
3260 failure, which is pointless.
3262 24. Implemented tls_on_connect_ports.
3264 25. Implemented acl_smtp_predata.
3266 26. If the domain in control=submission is set empty, Exim assumes that the
3267 authenticated id is a complete email address when it generates From: or
3268 Sender: header lines.
3270 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3271 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3272 chown and chgrp in /bin and hostname in /usr/bin.
3274 28. Exim was keeping the "process log" file open after each use, just as it
3275 does for the main log. This opens the possibility of it remaining open for
3276 long periods when the USR1 signal hits a daemon. Occasional processlog
3277 errors were reported, that could have been caused by this. Anyway, it seems
3278 much more sensible not to leave this file open at all, so that is what now
3281 29. The long-running daemon process does not normally write to the log once it
3282 has entered its main loop, and it closes the log before doing so. This is
3283 so that log files can straightforwardly be renamed and moved. However,
3284 there are a couple of unusual error situations where the daemon does write
3285 log entries, and I had neglected to close the log afterwards.
3287 30. The text of an SMTP error response that was received during a remote
3288 delivery was being truncated at 512 bytes. This is too short for some of
3289 the long messages that one sometimes sees. I've increased the limit to
3292 31. It is now possible to make retry rules that apply only when a message has a
3293 specific sender, in particular, an empty sender.
3295 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3296 it possible to be selective about when SMTP synchronization is enforced.
3298 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3300 32. Implemented hosts_connection_nolog.
3302 33. Added an ACL for QUIT.
3304 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3307 35. Added mailbox_size and mailbox_filecount to appendfile.
3309 36. Added control = no_multiline_responses to ACLs.
3311 37. There was a bug in the logic of the code that waits for the clock to tick
3312 in the case where the clock went backwards by a substantial amount such
3313 that the microsecond fraction of "now" was more than the microsecond
3314 fraction of "then" (but the whole seconds number was less).
3316 38. Added support for the libradius Radius client library this is found on
3317 FreeBSD (previously only the radiusclient library was supported).
3323 1. When certain lookups returned multiple values in the form name=value, the
3324 quoting of the values was not always being done properly. Specifically:
3325 (a) If the value started with a double quote, but contained no whitespace,
3327 (b) If the value contained whitespace other than a space character (i.e.
3328 tabs or newlines or carriage returns) it was not quoted.
3329 This fix has been applied to the mysql and pgsql lookups by writing a
3330 separate quoting function and calling it from the lookup code. The fix
3331 should probably also be applied to nisplus, ibase and oracle lookups, but
3332 since I cannot test any of those, I have not disturbed their existing code.
3334 2. A hit in the callout cache for a specific address caused a log line with no
3335 reason for rejecting RCPT. Now it says "Previous (cached) callout
3336 verification failure".
3338 3. There was an off-by-one bug in the queryprogram router. An over-long
3339 return line was truncated at 256 instead of 255 characters, thereby
3340 overflowing its buffer with the terminating zero. As well as fixing this, I
3341 have increased the buffer size to 1024 (and made a note to document this).
3343 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3344 when Exim is waiting for an SMTP response from a remote server, Exim
3345 restarts its select() call on the socket, thereby resetting its timeout.
3346 This is not a problem when such interrupts are rare. Somebody set up a cron
3347 job to run exiwhat every 2 minutes, which is less than the normal select()
3348 timeout (5 or 10 minutes). This meant that the select() timeout never
3349 kicked in because it was always reset. I have fixed this by comparing the
3350 time when an interrupt arrives with the time at the start of the first call
3351 to select(). If more time than the timeout has elapsed, the interrupt is
3352 treated as a timeout.
3354 5. Some internal re-factoring in preparation for the addition of Sieve
3355 extensions (by MH). In particular, the "personal" test is moved to a
3356 separate function, and given an option for scanning Cc: and Bcc: (which is
3357 not set for Exim filters).
3359 6. When Exim created an email address using the login of the caller as the
3360 local part (e.g. when creating a From: or Sender: header line), it was not
3361 quoting the local part when it contained special characters such as @.
3363 7. Installed new OpenBSD configuration files.
3365 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3366 try to make them clearer.
3368 9. Callout options, other than the timeout value, were being ignored when
3369 verifying sender addresses in header lines. For example, when using
3371 verify = header_sender/callout=no_cache
3373 the cache was (incorrectly) being used.
3375 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3376 only the Cygwin environment.
3378 11. When return_path_on_delivery was set as a log selector, if different remote
3379 addresses in the same message used different return paths and parallel
3380 remote delivery occurred, the wrong values would sometimes be logged.
3381 (Whenever a remote delivery process finished, the return path value from
3382 the most recently started remote delivery process was logged.)
3384 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3385 lines when AUTH and/or TLS are in use. This is the "received protocol"
3386 field. Exim used to use "asmtp" for authenticated SMTP, without any
3387 indication (in the protocol name) for TLS use. Now it follows the RFC and
3388 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3389 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3390 names appear in log lines as well as in Received: header lines.
3392 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3393 extensions, and comparison tests, and to fix some bugs.
3395 14. Changes to the "personal" filter test:
3397 (1) The test was buggy in that it was just doing the equivalent of
3398 "contains" tests on header lines. For example, if a user's address was
3399 anne@some.where, the "personal" test would incorrectly be true for
3401 To: susanne@some.where
3403 This test is now done by extracting each address from the header in turn,
3404 and checking the entire address. Other tests that are part of "personal"
3405 are now done using regular expressions (for example, to check local parts
3406 of addresses in From: header lines).
3408 (2) The list of non-personal local parts in From: addresses has been
3409 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3410 taken from the Sieve specification recommendations.
3412 (3) If the message contains any header line starting with "List-" it is
3413 treated as non-personal.
3415 (4) The test for "circular" in the Subject: header line has been removed
3416 because it now seems ill-conceived.
3418 15. Minor typos in src/EDITME comments corrected.
3420 16. Installed latest exipick from John Jetmore.
3422 17. If headers_add on a router specified a text string that was too long for
3423 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3424 of string_sprintf() is now avoided.
3426 18. $message_body_size was not set (it was always zero) when running the DATA
3427 ACL and the local_scan() function.
3429 19. For the "mail" command in an Exim filter, no default was being set for
3430 the once_repeat time, causing a random time value to be used if "once" was
3431 specified. (If the value happened to be <= 0, no repeat happened.) The
3432 default is now 0s, meaning "never repeat". The "vacation" command was OK
3433 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3434 (I found it when inspecting the code).
3436 20. There is now an overall timeout for performing a callout verification. It
3437 defaults to 4 times the callout timeout, which applies to individual SMTP
3438 commands during the callout. The overall timeout applies when there is more
3439 than one host that can be tried. The timeout is checked before trying the
3440 next host. This prevents very long delays if there are a large number of
3441 hosts and all are timing out (e.g. when the network connections are timing
3442 out). The value of the overall timeout can be changed by specifying an
3443 additional sub-option for "callout", called "maxwait". For example:
3445 verify = sender/callout=5s,maxwait=20s
3447 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3448 to the end before writing, but this should make it even safer).
3450 22. Exim was forgetting that it had advertised PIPELINING for the second and
3451 subsequent messages on an SMTP connection. It was also not resetting its
3452 memory on STARTTLS and an internal HELO.
3454 23. When Exim logs an SMTP synchronization error within a session, it now
3455 records whether PIPELINING has been advertised or not.
3457 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3458 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3459 rather than long int.
3461 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3463 26. Added the never_mail option to autoreply.
3469 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3470 crash if the getsockname() call failed; this can happen if a connection is
3471 closed very soon after it is established. The problem was simply in the
3472 order in which certain operations were done, causing Exim to try to write
3473 to the SMTP stream before it had set up the file descriptor. The bug has
3474 been fixed by making things happen in the correct order.
3480 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3481 before the connection was closed, thus losing the rejection response.
3483 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3484 some early Solaris releases, but causes trouble in current releases where
3485 socklen_t is defined.
3487 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3490 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3493 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3494 that releasing the top of it at the end releases what was used for sub-
3495 expansions (unless the block got too big). However, discard this block if
3496 the first thing is a variable or header, so that we can use its block when
3497 it is dynamic (useful for very large $message_headers, for example).
3499 6. Lookups now cache *every* query, not just the most recent. A new, separate
3500 store pool is used for this. It can be recovered when all lookup caches are
3501 flushed. Lookups now release memory at the end of their result strings.
3502 This has involved some general refactoring of the lookup sources.
3504 7. Some code has been added to the store_xxx() functions to reduce the amount
3505 of flapping under certain conditions.
3507 8. log_incoming_interface used to affect only the <= reception log lines. Now
3508 it causes the local interface and port to be added to several more SMTP log
3509 lines, for example "SMTP connection from", and rejection lines.
3511 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3513 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3515 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3516 could be overwritten at the end of the current message (or the start of a
3517 new message if it was set in a HELO ACL). The value is now preserved for
3518 the duration of the SMTP connection.
3520 12. If a transport had a headers_rewrite setting, and a matching header line
3521 contained an unqualified address, that address was qualified, even if it
3522 did not match any rewriting rules. The underlying bug was that the values
3523 of the flags that permit the existence of unqualified sender and recipient
3524 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3525 non-local messages, and by -bnq for local messages) were not being
3526 preserved with the message after it was received.
3528 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3529 "next input=" as part of the text comprising the host identity instead of
3530 the correct text. The code was using the same buffer for two different
3531 strings. However, depending on which order the printing function evaluated
3532 its arguments, the bug did not always show up. Under Linux, for example, my
3533 test suite worked just fine.
3535 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3536 doesn't work with some older versions of Perl. It has been changed to "my",
3537 which in any case is probably the better facility to use.
3539 15. A really picky compiler found some instances of statements for creating
3540 error messages that either had too many or two few arguments for the format
3543 16. The size of the buffer for calls to the DNS resolver has been increased
3544 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3545 for addresses that have a lot of PTR records. This alleviates a problem; it
3546 does not fully solve it.
3548 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3549 buffer now truncates the list and logs the incident, which is the same
3550 action as happens when Exim is looking up a host name and its aliases.
3551 Previously in this situation something unpredictable would happen;
3552 sometimes it was "internal error: store_reset failed".
3554 18. If a server dropped the connection unexpectedly when an Exim client was
3555 using GnuTLS and trying to read a response, the client delivery process
3556 crashed while trying to generate an error log message.
3558 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3559 string, for example:
3561 warn message = H1: something\nH2: something
3563 the text was added as a single header line from Exim's point of view
3564 though it ended up OK in the delivered message. However, searching for the
3565 second and subsequent header lines using $h_h2: did not work. This has been
3566 fixed. Similarly, if a system filter added multiple headers in this way,
3567 the routers could not see them.
3569 20. Expanded the error message when iplsearch is called with an invalid key to
3570 suggest using net-iplsearch in a host list.
3572 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3573 ACLs are no longer actually imposed (and a message to that effect is
3576 22. If a "gecos" field in a passwd entry contained escaped characters, in
3577 particular, if it contained a \" sequence, Exim got it wrong when building
3578 a From: or a Sender: header from that name. A second bug also caused
3579 incorrect handling when an unquoted " was present following a character
3580 that needed quoting.
3582 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3583 was not being matched caselessly.
3585 24. Arranged for all hyphens in the exim.8 source to be escaped with
3588 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3589 properly. Recipient callout cache records were still being keyed to include
3590 the sender, even when use_sender was set false. This led to far more
3591 callouts that were necessary. The sender is no longer included in the key
3592 when use_sender is false.
3594 26. Added "control = submission" modifier to ACLs.
3596 27. Added the ${base62d: operator to decode base 62 numbers.
3598 28. dnsdb lookups can now access SRV records.
3600 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3601 the configuration file.
3603 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3604 (-v) mode. This makes the output for a verbose queue run more intelligible.
3606 31. Added a use_postmaster feature to recipient callouts.
3608 32. Added the $body_zerocount variable, containing the number of binary zero
3609 bytes in the message body.
3611 33. The time of last modification of the "new" subdirectory is now used as the
3612 "mailbox time last read" when there is a quota error for a maildir
3615 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3617 35. Added +ignore_unknown as a special item in host lists.
3619 36. Code for decoding IPv6 addresses in host lists is now included, even if
3620 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3621 address was recognized as an IP address, but was then not correctly decoded
3622 into binary, causing unexpected and incorrect effects when compared with
3629 1. Very minor rewording of debugging text in manualroute to say "list of
3630 hosts" instead of "hostlist".
3632 2. If verify=header_syntax was set, and a header line with an unqualified
3633 address (no domain) and a large number of spaces between the end of the
3634 name and the colon was received, the reception process suffered a buffer
3635 overflow, and (when I tested it) crashed. This was caused by some obsolete
3636 code that should have been removed. The fix is to remove it!
3638 3. When running in the test harness, delay a bit after writing a bounce
3639 message to get a bit more predictability in the log output.
3641 4. Added a call to search_tidyup() just before forking a reception process. In
3642 theory, someone could use a lookup in the expansion of smtp_accept_max_
3643 per_host which, without the tidyup, could leave open a database connection.
3645 5. Added the variables $recipient_data and $sender_data which get set from a
3646 lookup success in an ACL "recipients" or "senders" condition, or a router
3647 "senders" option, similar to $domain_data and $local_part_data.
3649 6. Moved the writing of debug_print from before to after the "senders" test
3652 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3653 problems for message scanning, either using a data ACL, or using
3654 local_scan() because the Received: header was not generated till after they
3655 were called (in order to set the time as the time of reception completion).
3656 I have revised the way this works. The header is now generated after the
3657 body is received, but before the ACL or local_scan() are called. After they
3658 are run, the timestamp in the header is updated.
3664 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3665 before starting a queue runner without re-exec. This happened only when
3666 deliver_drop_privilege was set or when the Exim user was set to root. The
3667 effect of the bug was that timeouts during subsequent deliveries caused
3668 crashes instead of being properly handled. The handler is now left at its
3669 default (and expected) setting.
3671 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3672 message, again when deliver_drop_privilege is set or Exim is run as root.
3673 The bug described in (1) was not present in this case, but the tidying up
3674 of the other signals was missing. I have made the two cases consistent.
3676 3. The ignore_target_hosts setting on a manualroute router was being ignored
3677 for hosts that were looked up using the /MX notation.
3679 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3682 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3683 operated on the sender address. After changing the $sender_address to <>
3684 for the sender address verify, Exim was re-instated it as the original
3685 (before rewriting) address, but remembering that it had rewritten it, so it
3686 wasn't rewriting it again. This bug also had the effect of breaking the
3687 sender address verification caching when the sender address was rewritten.
3689 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3690 This has been changed so that if the ip literal address matches
3691 ignore_target_hosts, the router declines.
3693 7. Added expansion conditions match_domain, match_address, and match_local_
3694 part (NOT match_host).
3696 8. The placeholder for the Received: header didn't have a length field set.
3698 9. Added code to Exim itself and to exim_lock to test for a specific race
3699 condition that could lead to file corruption when using MBX delivery. The
3700 issue is with the lockfile that is created in /tmp. If this file is removed
3701 after a process has opened it but before that process has acquired a lock,
3702 there is the potential for a second process to recreate the file and also
3703 acquire a lock. This could lead to two Exim processes writing to the file
3704 at the same time. The added code performs the same test as UW imapd; it
3705 checks after acquiring the lock that its file descriptor still refers to
3706 the same named file.
3708 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3709 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3712 11. Added the smtp_active_hostname option. If used, this will typically be made
3713 to depend on the incoming interface address. Because $interface_address is
3714 not set up until the daemon has forked a reception process, error responses
3715 that can happen earlier (such as "too many connections") no longer contain
3718 12. If an expansion in a condition on a "warn" statement fails because a lookup
3719 defers, the "warn" statement is abandoned, and the next ACL statement is
3720 processed. Previously this caused the whole ACL to be aborted.
3722 13. Added the iplsearch lookup type.
3724 14. Added ident_timeout as a log selector.
3726 15. Added tls_certificate_verified as a log selector.
3728 16. Added a global option tls_require_ciphers (compare the smtp transport
3729 option of the same name). This controls incoming TLS connections.
3731 17. I finally figured out how to make tls_require_ciphers do a similar thing
3732 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3733 before starting the TLS session.
3735 18. Tabs are now shown as \t in -bP output.
3737 19. If the log selector return_path_on_delivery was set, Exim crashed when
3738 bouncing a message because it had too many Received: header lines.
3740 20. If two routers both had headers_remove settings, and the first one included
3741 a superfluous trailing colon, the final name in the first list and the
3742 first name in the second list were incorrectly joined into one item (with a
3743 colon in the middle).
3749 1. Added -C and -D options to the exinext utility, mainly to make it easier
3750 to include in the automated testing, but these could be helpful when
3751 multiple configurations are in use.
3753 2. The exinext utility was not formatting the output nicely when there was
3754 an alternate port involved in the retry record key, nor when there was a
3755 message id as well (for retries that were specific to a specific message
3756 and a specific host). It was also confused by IPv6 addresses, because of
3757 the additional colons they contain. I have fixed the IPv4 problem, and
3758 patched it up to do a reasonable job for IPv6.
3760 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3761 delivery, the log line now contains "pipelined" if PIPELINING was used.
3763 4. An SMTP transport process used to panic and die if the bind() call to set
3764 an explicit outgoing interface failed. This has been changed; it is now
3765 treated in the same way as a connect() failure.
3767 5. A reference to $sender_host_name in the part of a conditional expansion
3768 that was being skipped was still causing a DNS lookup. This no longer
3771 6. The def: expansion condition was not recognizing references to header lines
3772 that used bh_ and bheader_.
3774 7. Added the _cache feature to named lists.
3776 8. The code for checking quota_filecount in the appendfile transport was
3777 allowing one more file than it should have been.
3779 9. For compatibility with Sendmail, the command line option
3787 and sets the incoming protocol and host name (for trusted callers). The
3788 host name and its colon can be omitted when only the protocol is to be set.
3789 Note the Exim already has two private options, -pd and -ps, that refer to
3790 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3791 "s", but I don't think that's a major issue.
3793 10. A number of refactoring changes to the code, none of which should affect
3796 (a) The number of logging options was getting close to filling up the
3797 32-bit word that was used as a bit map. I have split them into two classes:
3798 those that are passed in the argument to log_write(), and those that are
3799 only ever tested independently outside of that function. These are now in
3800 separate 32-bit words, so there is plenty of room for expansion again.
3801 There is no change in the user interface or the logging behaviour.
3803 (b) When building, for example, log lines, the code previously used a
3804 macro that called string_cat() twice, in order to add two strings. This is
3805 not really sufficiently general. Furthermore, there was one instance where
3806 it was actually wrong because one of the argument was used twice, and in
3807 one call a function was used. (As it happened, calling the function twice
3808 did not affect the overall behaviour.) The macro has been replaced by a
3809 function that can join an arbitrary number of extra strings onto a growing
3812 (c) The code for expansion conditions now uses a table and a binary chop
3813 instead of a serial search (which was left over from when there were very
3814 few conditions). Also, it now recognizes conditions like "pam" even when
3815 the relevant support is not compiled in: a suitably worded error message is
3816 given if an attempt is made to use such a condition.
3818 11. Added ${time_interval:xxxxx}.
3820 12. A bug was causing one of the ddress fields not to be passed back correctly
3821 from remote delivery subprocesses. The field in question was not being
3822 subsequently used, so this caused to problems in practice.
3824 13. Added new log selectors queue_time and deliver_time.
3826 14. Might have fixed a bug in maildirsizefile handling that threw up
3827 "unexpected character" debug warnings, and recalculated the data
3828 unnecessarily. In any case, I expanded the warning message to give more
3831 15. Added the message "Restricted characters in address" to the statements in
3832 the default ACL that block characters like @ and % in local parts.
3834 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3835 Three changes have been made:
3837 (a) There was a serious bug; a negative response to MAIL caused the whole
3838 recipient domain to be cached as invalid, thereby blocking all messages
3839 to all local parts at the same domain, from all senders. This bug has
3840 been fixed. The domain is no longer cached after a negative response to
3841 MAIL if the sender used is not empty.
3843 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3846 (c) A new callout option, "use_sender" has been added for people who want
3847 the modified behaviour.
3853 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3856 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3857 indeed breaks things for older releases.
3859 3. Added additional logging to the case where there is a problem reading data
3860 from a filter that is running in a subprocess using a pipe, in order to
3861 try to track down a specific problem.
3863 4. Testing facility fudge: when running in the test harness and attempting
3864 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3865 getting "No route to host". Convert this to a timeout.
3867 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3870 6. Some OS don't have socklen_t but use size_t instead. This affects the
3871 fifth argument of getsockopt() amongst other things. This is now
3872 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3873 can be set for individual OS. I have set it for SunOS5, OSF1, and
3874 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3875 some earlier ones do not.
3877 7. Change 4.30/15 was not doing the test caselessly.
3879 8. The standard form for an IPv6 address literal was being rejected by address
3880 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3881 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3882 this, as well as the form without the "IPv6" on the front (but only when
3883 address literals are enabled, of course).
3885 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3887 10. Exim crashed if a message with an empty sender address specified by -f
3888 encountered a router with an errors_to setting. This could be provoked only
3889 by a command such as
3893 where an empty string was supplied; "<>" did not hit this bug.
3895 11. Installed PCRE release 4.5.
3897 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3898 remained set. It is now erased.
3900 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3901 times from message ids (which are base 36 rather than the normal 62).
3903 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3904 were being counted as actual protocol errors, and logged if the log
3905 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3906 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3907 and DATA following a set of rejected RCPTs do not count as protocol errors.
3908 In other words, Exim assumes they were pipelined, though this may not
3909 actually be the case. Of course, in all cases the client gets an
3910 appropriate error code.
3912 15. If a lookup fails in an ACL condition, a message about the failure may
3913 be available; it is used if testing the ACL cannot continue, because most
3914 such messages specify what the cause of the deferral is. However, some
3915 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3916 that caused an old message to be retained and used if a later statement
3917 caused a defer, replacing the real cause of the deferral.
3919 16. If an IP address had so many PTR records that the DNS lookup buffer
3920 was not large enough to hold them, Exim could crash while trying to process
3921 the truncated data. It now detects and logs this case.
3923 17. Further to 4.21/58, another change has been made: if (and only if) the
3924 first line of a message (the first header line) ends with CRLF, a bare LF
3925 in a subsequent header line has a space inserted after it, so as not to
3926 terminate the header.
3928 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3929 unnecessarily, used atoi() instead of strtol(), and didn't check the
3930 termination when getting file sizes from file names by regex.
3932 19. Completely re-implemented the support for maildirsize files, in the light
3933 of a number of problems with the previous contributed implementation
3934 (4.30/29). In particular:
3936 . If the quota is zero, the maildirsize file is maintained, but no quota is
3939 . If the maildir directory does not exist, it is created before any attempt
3940 to write a maildirsize file.
3942 . The quota value in the file is just a cache; if the quota is changed in
3943 the transport, the new value overrides.
3945 . A regular expression is available for excluding directories from the
3948 20. The autoreply transport checks the characters in options that define the
3949 message's headers; it allows continued headers, but it was checking with
3950 isspace() after an embedded newline instead of explicitly looking for a
3953 21. If all the "regular" hosts to which an address was routed had passed their
3954 expiry times, and had not reached their retry times, the address was
3955 bounced, even if fallback hosts were defined. Now Exim should go on to try
3958 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3959 equivalent code in the SMTP transport. Some hosts send humungous responses
3960 to HELO/EHLO, more than 1024 it seems.
3962 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3963 gives compiler warnings in some environments. I've now done it "properly",
3966 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3967 (because of problems with the built-in one) was declared to return uschar *
3968 instead of char *, causing compiler failure.
3970 25. Fixed a file descriptor leak when processing alias/forward files.
3972 26. Fixed a minor format string issue in dbfn.c.
3974 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3976 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3977 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3980 29. When a sender address is verified, it is cached, to save repeating the test
3981 when there is more than one recipient in a message. However, when the
3982 verification involves a callout, it is possible for different callout
3983 options to be set for different recipients. It is too complicated to keep
3984 track of this in the cache, so now Exim always runs a verification when a
3985 callout is required, relying on the callout cache for the optimization.
3986 The overhead is duplication of the address routing, but this should not be
3989 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3990 to be verified with callout=postmaster, and the main callout worked but the
3991 postmaster check failed, the verification correctly failed. However, if a
3992 subsequent RCPT command asked for sender verification *without* the
3993 postmaster check, incorrect caching caused this verification also to fail,
3996 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3997 it was not caching the DNS options (qualify_single, search_parents) that
3998 were used when the lookup failed. A subsequent lookup with different
3999 options therefore always gave the same answer, though there were cases
4000 where it should not have. (Example: a "domains = !$mx_any" option on a
4001 dnslookup router: the "domains" option is always processed without any
4002 widening, but the router might have qualify_single set.) Now Exim uses the
4003 cached value only when the same options are set.
4005 32. Added John Jetmore's "exipick" utility to the distribution.
4007 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4008 than a timeout (e.g. a certificate is required, and is not provided), an
4009 Exim server now closes the connection immediately. Previously it waited for
4010 the client to close - but if the client is SSL, it seems that they each
4011 wait for each other, leading to a delay before one of them times out.
4013 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4014 maintained 0.8.x compatibility because I don't think many are using it, and
4015 it is clearly obsolete.
4017 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4020 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4021 client certificate was expired. A simple patch fixes this, though I don't
4022 understand the full logic of why the verify callback is called multiple
4025 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4026 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4027 which causes problems with some clients (such as the Certicom SSL Plus
4028 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4029 disables the coutermeasure allowing Eudora to connect."
4031 38. Exim was not checking that a write() to a log file succeeded. This could
4032 lead to Bad Things if a log got too big, in particular if it hit a file
4033 size limit. Exim now panics and dies if it cannot write to a log file, just
4034 as it does if it cannot open a log file.
4036 39. Modified OS/Makefile-Linux so that it now contains
4038 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4040 The two -D definitions ensure that Exim is compiled with large file
4041 support, which makes it possible to handle log files that are bigger than
4044 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4045 instance) a domain was checked against a named list that involved a lookup,
4046 causing $domain_data to be set, then another domain was checked against the
4047 same list, then the first domain was re-checked, the value of $domain_data
4048 after the final check could be wrong. In particular, if the second check
4049 failed, it could be set empty. This bug probably also applied to
4052 41. The strip_trailing_dot option was not being applied to the address given
4053 with the -f command-line option.
4055 42. The code for reading a message's header from the spool was incrementing
4056 $received_count, but never initializing it. This meant that the value was
4057 incorrect (doubled) while delivering a message in the same process in which
4058 it was received. In the most common configuration of Exim, this never
4059 happens - a fresh exec is done - but it can happen when
4060 deliver_drop_privilege is set.
4062 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4063 it now includes up to 150 characters of the unexpected data in the log
4066 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4067 and building data strings. The size of both of these buffers was 10 000
4068 bytes - far larger than anybody would *ever* want, thought I. Needless to
4069 say, somebody hit the limit. I have increased the maximum line length to
4070 20 000 and the maximum data length of concatenated lines to 100 000. I have
4071 also fixed two bugs, because there was no checking on these buffers. Tsk,
4072 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4073 buffer is too small.
4075 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4076 lsearch lookups. Now it does.
4078 46. When parsing a route_list item in a manualroute router, a fixed-length
4079 buffer was used for the list of hosts. I made this 1024 bytes long,
4080 thinking that nobody would ever have a list of hosts that long. Wrong.
4081 Somebody had a whole pile of complicated expansion conditions, and the
4082 string was silently truncated, leading to an expansion error. It turns out
4083 that it is easier to change to an unlimited length (owing to other changes
4084 that have happened since this code was originally written) than to build
4085 structure for giving a limitation error. The length of the item that
4086 expands into the list of hosts is now unlimited.
4088 47. The lsearch lookup could not handle data where the length of text line was
4089 more than 4095 characters. Such lines were truncated, leading to shortened
4090 data being returned. It should now handle lines of any length.
4092 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4093 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4096 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4097 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4098 no longer happens in comment lines. A list of replacements is now placed
4099 at the head of all of the source files, except those whose only change is
4100 to replace PERL_COMMAND in the very first #! line.
4102 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4103 messages on the queue, with a bottom-up merge sort, using code contributed
4104 by Michael Haardt. This should make operations like -bp somewhat faster on
4105 large queues. It won't affect queue runners, except when queue_run_in_order
4108 51. Installed eximstats 1.31 in the distribution.
4110 52. Added support for SRV lookups to the dnslookup router.
4112 53. If an ACL referred to $message_body or $message_body_end, the value was not
4113 reset for any messages that followed in the same SMTP session.
4115 54. The store-handling optimization for building very long strings was not
4116 differentiating between the different store pools. I don't think this
4117 actually made any difference in practice, but I've tidied it.
4119 55. While running the routers to verify a sender address, $sender_address
4120 was still set to the sender address. This is wrong, because when routing to
4121 send a bounce to the sender, it would be empty. Therefore, I have changed
4122 it so that, while verifying a sender address, $sender_address is set to <>.
4123 (There is no change to what happens when verifying a recipient address.)
4125 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4126 target A or AAAA records (if not already returned) without resetting the
4127 qualify_single or search_parents options of the DNS resolver. These are
4128 inappropriate in this case because the targets of MX and SRV records must
4129 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4130 target that, when qualified, matched something in the local domain. These
4131 two options are now turned off when doing these lookups.
4133 57. It seems that at least some releases of Reiserfs (which does not have the
4134 concept of a fixed number of inodes) returns zero and not -1 for the
4135 number of available inodes. This interacted badly with check_spool_inodes,
4136 which assumed that -1 was the "no such thing" setting. What I have done is
4137 to check that the total number of inodes is greater than zero before doing
4138 the test of how many are available.
4140 58. When a "warn" ACL statement has a log_message modifier, the message is
4141 remembered, and not repeated. This is to avoid a lot of repetition when a
4142 message has many recipients that cause the same warning to be written.
4143 Howewer, Exim was preserving the list of already written lines for an
4144 entire SMTP session, which doesn't seem right. The memory is now reset if a
4145 new message is started.
4147 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4148 debugging output unless log_rewrite was also set.
4150 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4151 of (int)(handle) when we know that handle contains (void *)(-1).
4153 61. The Exim daemon panic-logs an error return when it closes the incoming
4154 connection. However "connection reset by peer" seems to be common, and
4155 isn't really an error worthy of noting specially, so that particular error
4158 62. When Exim is trying to find all the local interfaces, it used to panic and
4159 die if the ioctl to get the interface flags failed. However, it seems that
4160 on at least one OS (Solaris 9) it is possible to have an interface that is
4161 included in the list of interfaces, but for which you get a failure error
4162 for this call. This happens when the interface is not "plumbed" into a
4163 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4164 failure of the "get flags" call assumes that the interface is down.
4166 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4167 makes life easier for people who are doing arithmetic on fields extracted
4168 from dates, where you often get leading zeros that should not be
4169 interpreted as octal.
4171 64. Added qualify_domain to the redirect router, to override the global
4174 65. If a pathologically long header line contained very many addresses (the
4175 report of this problem mentioned 10 000) and each of them was rewritten,
4176 Exim could use up a very large amount of memory. (It kept on making new
4177 copies of the header line as it rewrote, and never released the old ones.)
4178 At the expense of a bit more processing, the header rewriting function has
4179 been changed so that it no longer eats memory in this way.
4181 66. The generation of the Received: header has been moved from the time that a
4182 message starts to be received, to the time that it finishes. The timestamp
4183 in the Received: header should now be very close to that of the <= log
4184 line. There are two side-effects of this change:
4186 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4187 logged header lines no longer include the local Received: line, because
4188 it has not yet been created. The same applies to a copy of the message
4189 that is returned to a non-SMTP sender when a message is rejected.
4191 (b) When a filter file is tested using -bf, no additional Received: header
4192 is added to the test message. After some thought, I decided that this
4195 This change does not affect the value of $received_for. It is still set
4196 after address rewriting, but before local_scan() is called.
4198 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4200 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4201 gave an unhelpful panic error message, and a defer error. I have managed to
4202 change this behaviour so that it now rejects any supplied certificate,
4203 which seems right, as the list of acceptable certificates is empty.
4205 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4206 gave an unhelpful defer error. I have not managed to make this reject any
4207 supplied certificates, but the error message it gives is "no certificate
4208 supplied", which is not helpful.
4210 70. exigrep's output now also includes lines that are not associated with any
4211 message, but which match the given pattern. Implemented by a patch from
4212 Martin Sluka, which also tidied up the Perl a bit.
4214 71. Recipient callout verification, like sender verification, was using <> in
4215 the MAIL FROM command. This isn't really the right thing, since the actual
4216 sender may affect whether the remote host accepts the recipient or not. I
4217 have changed it to use the actual sender in the callout; this means that
4218 the cache record is now keyed on a recipient/sender pair, not just the
4219 recipient address. There doesn't seem to be a real danger of callout loops,
4220 since a callout by the remote host to check the sender would use <>.
4221 [SEE ABOVE: changed after hitting problems.]
4223 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4224 temporary errors. However, in the case of such a code being given after
4225 the end of a data transmission (i.e. after ".") Exim was failing to write
4226 a retry record for the message. (Yes, there was some broken host that was
4227 actually sending 8xx at this point.)
4229 73. An unknown lookup type in a host list could cause Exim to panic-die when
4230 the list was checked. (An example that provoked this was putting <; in the
4231 middle of a list instead of at the start.) If this happened during a DATA
4232 ACL check, a -D file could be left lying around. This kind of configuration
4233 error no longer causes Exim to die; instead it causes a defer errror. The
4234 incident is still logged to the main and panic logs.
4236 74. Buglet left over from Exim 3 conversion. The message "too many messages
4237 in one connection" was written to the rejectlog but not the mainlog, except
4238 when address rewriting (yes!) was being logged.
4240 75. Added write_rejectlog option.
4242 76. When a system filter was run not as root (that is, when system_filter_user
4243 was set), the values of the $n variables were not being returned to the
4244 main process; thus, they were not subsequently available in the $sn
4247 77. Added +return_path_on_delivery log selector.
4249 78. A connection timeout was being treated differently from recipients deferred
4250 when testing hosts_max_try with a message that was older than the host's
4251 retry timeout. (The host should not be counted, thus allowing all hosts to
4252 be tried at least once before bouncing.) This may have been the cause of an
4253 occasionally reported bug whereby a message would remain on the queue
4254 longer than the retry timeout, but would be bounced if a delivery was
4255 forced. I say "may" because I never totally pinned down the problem;
4256 setting up timeout/retry tests is difficult. See also the next item.
4258 79. The ultimate address timeout was not being applied to errors that involved
4259 a combination of host plus message (for example, a timeout on a MAIL
4260 command). When an address resolved to a number of possible hosts, and they
4261 were not all tried for each delivery (e.g. because of hosts_max_try), a
4262 message could remain on the queue longer than the retry timeout.
4264 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4267 81. Fixed an obscure SMTP outgoing bug which required at least the following
4268 conditions: (a) there was another message waiting for the same server;
4269 (b) the server returned 5xx to all RCPT commands in the first message so
4270 that the message was not completed; (c) the server dropped the connection
4271 or gave a negative response to the RSET that Exim sends to abort the
4272 transaction. The observed case was a dropped connection after DATA that had
4273 been sent in pipelining mode. That is, the server had advertised PIPELINING
4274 but was not implementing it correctly. The effect of the bug was incorrect
4275 behaviour, such as trying another host, and this could lead to a crash.
4281 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4282 and daemon.c were passed as pointers to ints; they should have been
4283 pointers to socklen_t variables (which are typically unsigned ints).
4285 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4288 3. Fixed a really odd bug that affected only the testing scheme; patching a
4289 certain fixed string in the binary changed the value of another string that
4290 happened to be identical to the end of the original first string.
4292 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4293 name", it returns that address as the IP address. On some operating
4294 systems (e.g. Solaris), it also passes back the IP address string as the
4295 "host name". However, on others (e.g. Linux), it passes back an empty
4296 string. Exim wasn't checking for this, and was changing the host name to an
4297 empty string, assuming it had been canonicized.
4299 5. Although rare, it is permitted to have more than one PTR record for a given
4300 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4301 all the names associated with an address, because they do in Solaris.
4302 However, it seems that they do not in Linux for data that comes from the
4303 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4304 I found this out when I moved to a new Linux workstation and tried to run
4305 the Exim test suite.
4307 To get round this problem I have changed the code so that it now does its
4308 own call to the DNS to look up PTR records when searching for a host name.
4309 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4310 addresses that are only in /etc/hosts are still found.
4312 This behaviour is, however, controlled by an option called host_lookup_
4313 order, which defaults to "bydns:byaddr". If people want to use the other
4314 order, or indeed, just use one or the other means of lookup, they can
4315 specify it in this variable.
4317 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4318 some operating systems, this comes back from gethostbyaddr() as an empty
4319 string, and this is what Exim used to test for. However, it seems that in
4320 other systems, "." is yielded. Exim now tests for this case too.
4322 7. The values of check_spool_space and check_log_space are now held internally
4323 as a number of kilobytes instead of an absolute number of bytes. If a
4324 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4325 kilobyte. This means that much larger values can be stored.
4327 8. Exim monitor: an attempt to get the action menu when not actually pointing
4328 at a message produces an empty menu entitled "No message selected". This
4329 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4330 no entries in it ("Shell widget menu has zero width and/or height"). So I
4331 have added a single, blank menu entry in this case.
4333 9. Added ${quote_local_part.
4335 10. MIME decoding is now applied to the contents of Subject: header lines when
4338 11. Now that a reference to $sender_host_address automatically causes a reverse
4339 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4340 host lookup before query-style lookups in lists that might use this
4341 variable. This has therefore been abolished, and the "net-" prefix is no
4342 longer necessary for query-style lookups.
4344 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4345 have been a typo for LFLAGS, so it has been changed.
4347 13. The install script calls Exim with "-C /dev/null" in order to find the
4348 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4349 to be output. Howeve, since Exim outputs its version number before the
4350 error, it didn't break the script. It just looked ugly. I fixed this by
4351 always allowing "-C /dev/null" if the caller is root.
4353 14. Ignore overlarge ACL variable number when reading spool file - insurance
4354 against a later release with more variables having written the file.
4356 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4357 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4358 this, as well as the form without the "IPv6" on the front.
4360 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4361 OS/Makefile-Darwin file.
4363 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4364 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4366 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4367 variable. However, some OS use ints for inodes. I've added cast to long int
4368 to get rid of the compiler warning.
4370 19. I had forgotten to lock out "/../" in configuration file names when
4371 ALT_CONFIG_PREFIX was set.
4373 20. Routers used for verification do not need to specify transports. However,
4374 if such a router generated a host list, and callout was configured, Exim
4375 crashed, because it could not find a port number from the (non-existent)
4376 transport. It now assumes port 25 in this circumstance.
4378 21. Added the -t option to exigrep.
4380 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4381 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4382 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4383 them is set, LOOKUP_LSEARCH is forced.
4385 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4387 24. Added sender and host information to the "rejected by local_scan()" log
4388 line; previously there was no indication of these.
4390 25. Added .include_if_exists.
4392 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4393 Linux. It turns out that not all file systems support this. Apparently some
4394 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4395 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4396 not supported on the file descriptor, is now ignored when Exim is trying to
4397 sync a directory. This applies only to Linux.
4399 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4401 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4402 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4405 29. Added support for maildirsize files from supplied patch (modified a bit).
4407 30. The use of :fail: followed by an empty string could lead Exim to respond to
4408 sender verification failures with (e.g.):
4410 550 Verification failed for <xxx>
4411 550 Sender verify failed
4413 where the first response line was missing the '-' that indicates it is not
4414 the final line of the response.
4416 31. The loop for finding the name of the user that called Exim had a hardwired
4417 limit of 10; it now uses the value of finduser_retries, which is used for
4418 all other user lookups.
4420 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4423 33. Exim was neglecting to zero errno before one call of strtol() when
4424 expanding a string and expecting an integer value. On some systems this
4425 resulted in spurious "integer overflow" errors. Also, it was casting the
4426 result into an int without checking.
4428 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4429 did not work. The code looks as if it has *never* worked, though it appears
4430 to have been documented since at least releast 1.62. I have made it work.
4432 35. The "timeout_DNS" error in retry rules, also documented since at least
4433 1.62, also never worked. As it isn't clear exactly what this means, and
4434 clearly it isn't a major issue, I have abolished the feature by treating it
4435 as "timeout", and writing a warning to the main and panic logs.
4437 36. The display of retry rules for -brt wasn't always showing the error code
4440 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4441 timeout_connect_A, timeout_connect_MX.
4443 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4444 to the empty sender.
4446 39. The daemon was not analysing the content of -oX till after it had closed
4447 stderr and disconnected from the controlling terminal. This meant that any
4448 syntax errors were only noted on the panic log, and the return code from
4449 the command was 0. By re-arranging the code a little, I've made the
4450 decoding happen first, so such errors now appear on stderr, and the return
4451 code is 1. However, the actual setting up of the sockets still happens in
4452 the disconnected process, so errors there are still only recorded on the
4455 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4456 connections (as happens on some IP stacks) was logged at start up time as
4457 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4458 it from "IPv6 and IPv4", which means that two separate sockets are being
4461 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4462 says whether AF_INET or AF_INET6 was passed as an argument.
4464 42. Exiwhat output was messed up when time zones were included in log
4467 43. Exiwhat now gives more information about the daemon's listening ports,
4468 and whether -tls-on-connect was used.
4470 44. The "port" option of the smtp transport is now expanded.
4472 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4473 silently ignored. Now an error message is written to the main and panic
4476 46. There's a new ACL modifier called "logwrite" which writes to a log file
4477 as soon as it is encountered.
4479 47. Added $local_user_uid and $local_user_gid at routing time.
4481 48. Exim crashed when trying to verify a sender address that was being
4484 49. Exim was recognizing only a space character after ".include". It now also
4485 recognizes a tab character.
4487 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4488 extracting the relevant information from the specification. The man page no
4489 longer contains scrambled data for the -d option, and I've added a section
4490 at the front about calling Exim under different names.
4492 51. Added "extra_headers" argument to the "mail" command in filter files.
4494 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4497 53. Installed eximstats 1.29.
4499 54. Added transport_filter_timeout as a generic transport option.
4501 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4502 Cc: header lines. This was required by RFC 822, but it not required by RFC
4505 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4506 incoming messages that did not have them. Now it does so only if the
4507 message originates locally, that is, if there is no associated remote host
4508 address. When Resent- header lines are present, this applies to the Resent-
4509 lines rather than the non-Resent- lines.
4511 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4512 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4514 58. Messages for configuration errors now include the name of the main
4515 configuration file - useful now that there may be more than one file in a
4516 list (.included file names were always shown).
4518 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4519 for those rare installations that do not start the daemon as root or run it
4520 setuid root. I've cut out the call to initgroups() if the daemon is not
4523 60. The Exim user and group can now be bound into the binary as text strings
4524 that are looked up at the start of Exim's processing.
4526 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4528 62. Added $mailstore_basename variable.
4530 63. Installed patch to sieve.c from Michael Haardt.
4532 64. When Exim failed to open the panic log after failing to open the main log,
4533 the original message it was trying to log was written to stderr and debug
4534 output, but if they were not available (the usual case in production), it
4535 was lost. Now it is written to syslog before the two lines that record the
4536 failures to open the logs.
4538 65. Users' Exim filters run in subprocesses under the user's uid. It is
4539 possible for a "deliver" command or an alias in a "personal" command to
4540 provoke an address rewrite. If logging of address rewriting is configured,
4541 this fails because the process is not running as root or exim. There may be
4542 a better way of dealing with this, but for the moment (because 4.30 needs
4543 to be released), I have disabled address rewrite logging when running a
4544 filter in a non-root, non-exim process.
4550 1. The buildconfig auxiliary program wasn't quoting the value set for
4551 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4552 not defined. This bug was masked in 4.22 by the effect that was fixed in
4555 2. Some messages that were rejected after a message id was allocated were
4556 shown as "incomplete" by exigrep. It no longer does this for messages that
4557 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4559 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4560 have allow_domain_literals set, the ID did not get logged in the <= line.
4561 Domain literals are now always recognized in Message-ID: header lines.
4563 4. The first argument for a ${extract expansion item is the key name or field
4564 number. Leading and trailing spaces in this item were not being ignored,
4565 causing some misleading effects.
4567 5. When deliver_drop_privilege was set, single queue runner processes started
4568 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4569 same command in the process it spins off) were not dropping privilege.
4571 6. When the daemon running as "exim" started a queue runner, it always
4572 re-executed Exim in the spun-off process. This is a waste of effort when
4573 deliver_drop_privilege is set. The new process now just calls the
4574 queue-runner function directly.
4580 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4583 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4584 ignored. Though the use of -oP was forcing the writing of a pid file, it
4585 was always written to the default place.
4587 3. If the message "no IP address found for host xxxx" is generated during
4588 incoming verification, it is now followed by identification of the incoming
4589 connection (so you can more easily find what provoked it).
4591 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4593 5. Added some features to "harden" Exim a bit more against certain attacks:
4595 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4596 be put in Local/Makefile. This is like the never_users runtime option,
4597 but it cannot be overridden. The default setting is "root".
4599 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4600 prefix string with which any file named in a -C command line option
4603 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4604 is retained for -C and -D only if the caller of Exim is root. Without
4605 it, the exim user may also use -C and -D and retain privilege.
4607 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4608 command line option is disabled.
4610 6. Macro names set by the -D option must start with an upper case letter, just
4611 like macro names defined in the configuration file.
4613 7. Added "dereference=" facility to LDAP.
4615 8. Two instances of the typo "uknown" in the source files are fixed.
4617 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4618 the Configure-Makefile script screwed up while processing it.
4620 10. Incorporated PCRE 4.4.
4622 11. The SMTP synchronization check was not operating right at the start of an
4623 SMTP session. For example, it could not catch a HELO sent before the client
4624 waited for the greeting. There is now a check for outstanding input at the
4625 point when the greeting is written. Because of the duplex, asynchronous
4626 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4627 way, but not yet received, when the check is performed.
4629 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4630 on TCP/IP sockets, because this apparently causes some broken clients to
4633 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4634 unchanged) from the Cygwin maintainer.
4636 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4637 was supported instead of testing for mbx. Effectively a typo.
4639 15. The spa authenticator server code was not checking that the input it
4640 received was valid base64.
4642 16. The debug output line for the "set" modifier in ACLs was not showing the
4643 name of the variable that was being set.
4645 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4647 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4648 lookup on its own. Something else was needed to trigger the lookup. For
4649 example, a match in host_lookup or the need for a host name in a host list.
4650 Now, if $sender_host_name is referenced and the host name has not yet been
4651 looked up, a lookup is performed. If the lookup fails, the variable remains
4652 empty, and $host_lookup_failed is set to "1".
4654 19. Added "eqi" as a case-independent comparison operator.
4656 20. The saslauthd authentication condition could segfault if neither service
4657 nor realm was specified.
4659 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4660 error message that was logged was misleading, and incoming SMTP
4661 connections were dropped. The message is now more accurate, and temporary
4662 errors are given to SMTP connections.
4664 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4665 (except RSET) with a 421 error, until QUIT is received. However, it was
4666 failing to send a response to QUIT.
4668 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4669 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4670 ACL is now run after the helo_try_verify_hosts code.
4672 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4673 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4674 case-independent, so other case variants are also recognized). Apparently
4675 some systems use these upper case variants.
4677 25. If more than two messages were waiting for the same host, and a transport
4678 filter was specified for the transport, Exim sent two messages over the
4679 same TCP/IP connection, and then failed with "socket operation on non-
4680 socket" when it tried to send the third.
4682 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4684 27. The extern definition of crypt16() in expand.c was not being excluded when
4685 the OS had its own crypt16() function.
4687 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4688 as a preferred synonym for return_size_limit, both as an option and as an
4691 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4693 30. Changed the default configuration ACL to relax the local part checking rule
4694 for addresses that are not in any local domains. For these addresses,
4695 slashes and pipe symbols are allowed within local parts, but the sequence
4696 /../ is explicitly forbidden.
4698 31. SPA server authentication was not clearing the challenge buffer before
4701 32. log_message in a "warn" ACL statement was writing to the reject log as
4702 well as to the main log, which contradicts the documentation and doesn't
4703 seem right (because no rejection is happening). So I have stopped it.
4705 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4706 However, I am unable to do any testing of this.
4708 34. Fixed an infelicity in the appendfile transport. When checking directories
4709 for a mailbox, to see if any needed to be created, it was accidentally
4710 using path names with one or more superfluous leading slashes; tracing
4711 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4713 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4714 contents are added to the log line that is written for every discarded
4715 recipient. (Previously a log_message setting was ignored.)
4717 36. The ${quote: operator now quotes the string if it is empty.
4719 37. The install script runs exim in order to find its version number. If for
4720 some reason other than non-existence or emptiness, which it checks, it
4721 could not run './exim', it was installing it with an empty version number,
4722 i.e. as "exim-". This error state is now caught, and the installation is
4725 38. An argument was missing from the function that creates an error message
4726 when Exim fails to connect to the socket for saslauthd authentication.
4727 This could cause Exim to crash, or give a corrupted message.
4729 39. Added isip, isip4, and isip6 to ${if conditions.
4731 40. The ACL variables $acl_xx are now saved with the message, and can be
4732 accessed later in routers, transports, and filters.
4734 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4735 strings in the file are not string-expanded.
4737 42. If a MAIL command specified a SIZE value that was too large to fit into an
4738 int variable, the check against message_size_limit failed. Such values are
4739 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4740 day this will have to be increased, but I don't think I want to be around
4741 when emails are that large.
4748 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4749 iconv() is not standard in FreeBSD.
4751 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4752 IPv6 enabled. The observed symptom was a segmentation fault on return from
4753 the function os_common_find_running_interfaces() in src/os.c.
4755 3. In the check_special_case() function in daemon.c I had used "errno" as an
4756 argument name, which causes warnings on some systems. This was basically a
4757 typo, since it was named "eno" in the comments!
4759 4. The code that waits for the clock to tick (at a resolution of some fraction
4760 of a second) so as to ensure message-id uniqueness was always waiting for
4761 at least one whole tick, when it could have waited for less. [This is
4762 almost certainly not relevant at current processor speeds, where it is
4763 unlikely to ever wait at all. But we try to future-proof.]
4765 5. The function that sleeps for a time interval that includes fractions of a
4766 second contained a race. It did not block SIGALRM between setting the
4767 timer, and suspending (a couple of lines later). If the interval was short
4768 and the sigsuspend() was delayed until after it had expired, the suspension
4769 never ended. On busy systems this could lead to processes getting stuck for
4772 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4773 process, before it forks any delivery processes. The open lookup caching
4774 mechanism meant that the open file or database connection was passed into
4775 the delivery process. The problem was that delivery processes always tidy
4776 up cached lookup data. This could cause a problem for the next delivery
4777 process started by the queue runner, because the external queue runner
4778 process does not know about the closure. So the next delivery process
4779 still has data in the lookup cache. In the case of a file lookup, there was
4780 no problem because closing a file descriptor in a subprocess doesn't affect
4781 the parent. However, if the lookup was caching a connection to a database,
4782 the connection was closed, and the second delivery process was likely to
4783 see errors such as "PGSQL: query failed: server closed the connection
4784 unexpectedly". The problem has been fixed by closing all cached lookups
4785 in a queue runner before running a delivery process.
4787 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4788 seem to have the "const" qualifier which it has on other OS. I've
4791 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4792 *of the same type* (client or server) with the same public name that an
4793 error should be diagnosed.
4795 9. When Exim looked up a host name for an IP address, but failed to find the
4796 original IP address when looking up the host name (a safety check), it
4797 output the message "<ip address> does not match any IP for NULL", which was
4798 confusing, to say the least. The bug was that the host name should have
4799 appeared instead of "NULL".
4801 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4802 user that is built into the binary, and the -C or -D options is used, root
4803 privilege is dropped before the configuration file is read. In addition,
4804 logging is switched to stderr instead of the normal log files. If the
4805 configuration then re-defines the Exim user, the unprivileged environment
4806 is probably not what is expected, so Exim logs a panic warning message (but
4809 However, if deliver_drop_privilege is set, the unprivileged state may well
4810 be exactly what is intended, so the warning has been cut out in that case,
4811 and Exim is allowed to try to write to its normal log files.
4817 1. smtp_return_error_details was not giving details for temporary sender
4818 or receiver verification errors.
4820 2. Diagnose a configuration error if two authenticators have the same public
4823 3. Exim used not to create the message log file for a message until the first
4824 delivery attempt. This could be confusing when incoming messages were held
4825 for policy or load reasons. The message log file is now created at the time
4826 the message is received, and an initial "Received" line is written to it.
4828 4. The automatically generated man page for command line options had a minor
4829 bug that caused no ill effects; however, a more serious problem was that
4830 the procedure for building the man page automatically didn't always
4831 operate. Consequently, release 4.20 contains an out-of-date version. This
4832 shouldn't happen again.
4834 5. When building Exim with embedded Perl support, the script that builds the
4835 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4836 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4838 6. The freeze_tell option was not being used for messages that were frozen on
4839 arrival, either by an ACL or by local_scan().
4841 7. Added the smtp_incomplete_transaction log selector.
4843 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4844 was accepting AUTH without a new EHLO.
4846 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4847 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4850 10. Logging of TCP/IP connections (when configured) now happens in the main
4851 daemon process instead of the child process, so that the TCP/IP connection
4852 count is more accurate (but it can never be perfect).
4854 11. The use of "drop" in a nested ACL was not being handled correctly in the
4855 outer ACL. Now, if condition failure induced by the nested "drop" causes
4856 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4857 or "require"), the connection is dropped.
4859 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4860 that yield "discard" can now be used with an "accept" or a "discard" verb,
4861 but an error is generated for any others (because I can't see a useful way
4862 to define what should happen).
4864 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4865 are now processed in the same way as lines in the Exim configuration file.
4866 In particular, continuation lines are supported.
4868 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4870 15. Added -ti meaning -t -i.
4872 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4873 domains, and warn by logging if others are found.
4875 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4876 returned from GIFCONF when Exim is trying to find the list of interfaces on
4877 a host. The code in os.c has been modified to copy each ifreq to an aligned
4878 structure in all cases.
4880 Also, in some cases, the returned ifreq's were being copied to a 'struct
4881 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4882 means the last couple of bytes of an IPv6 address could be chopped if the
4883 ifreq contained only a normal sockaddr (14 bytes storage).
4885 18. Named domain lists were not supported in the hosts_treat_as_local option.
4886 An entry such as +xxxx was not recognized, and was treated as a literal
4889 19. Ensure that header lines added by a DATA ACL are included in the reject log
4890 if the ACL subsequently rejects the message.
4892 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4893 MD5 (which is deprecated).
4895 21. When testing a filter file using -bf, Exim was writing a message when it
4896 took the sender from a "From " line in the message, but it was not doing so
4897 when it took $return_path from a Return-Path: header line. It now does.
4899 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4900 with a valid header line field name (a series of printing characters
4901 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4903 23. Changed "disc" in the source to "disk" to conform to the documentation and
4904 the book and for uniformity.
4906 24. Ignore Sendmail's -Ooption=value command line item.
4908 25. When execve() failed while trying to run a command in a pipe transport,
4909 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4910 could be confused with a return value of 69 from the command itself. This
4911 has been changed to 127, the value the shell returns if it is asked to run
4912 a non-existent command. The wording for the related log line suggests a
4913 non-existent command as the problem.
4915 26. If received_header_text expands to an empty string, do not add a Received:
4916 header line to the message. (Well, it adds a token one on the spool, but
4917 marks it "old" so that it doesn't get used or transmitted.)
4919 27. Installed eximstats 1.28 (addition of -nt option).
4921 28. There was no check for failure on the call to getsockname() in the daemon
4922 code. This can fail if there is a shortage of resources on the system, with
4923 ENOMEM, for example. A temporary error is now given on failure.
4925 29. Contrary to the C standard, it seems that in some environments, the
4926 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4927 program. Exim now does this explicitly; it affects the formatting of
4928 timestamps using strftime().
4930 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4931 complaints. I've now initialized all the variables, to avoid this.
4933 32. Header lines added by a system filter were not being "seen" during
4934 transport-time rewrites.
4936 33. The info_callback() function passed to OpenSSL is set up with type void
4937 (*)(SSL *, int, int), as described somewhere. However, when calling the
4938 function (actually a macro) that sets it up, the type void(*)() is
4939 expected. I've put in a cast to prevent warnings from picky compilers.
4941 34. If a DNS black list lookup found a CNAME record, but there were no A
4942 records associated with the domain it pointed at, Exim crashed.
4944 35. If a DNS black list lookup returned more than one A record, Exim ignored
4945 all but the first. It now scans all returned addresses if a particular IP
4946 value is being sought. In this situation, the contents of the
4947 $dnslist_value variable are a list of all the addresses, separated by a
4950 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4951 to accept a host name and all its aliases if the forward lookup for any of
4952 them yielded the IP address of the incoming connection. Now it accepts only
4953 those names whose forward lookup yields the correct IP address. Any other
4954 names are discarded. This closes a loophole whereby a rogue DNS
4955 administrator could create reverse DNS records to break through a
4956 wildcarded host restriction in an ACL.
4958 37. If a user filter or a system filter that ran in a subprocess used any of
4959 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4960 the wrong values were passed to the pipe command ($thisaddress had the
4961 value of $0, $0 had the value of $1, etc). This bug was introduced by
4962 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4964 38. Improved the line breaking for long SMTP error messages from ACLs.
4965 Previously, if there was no break point between 40 and 75 characters, Exim
4966 left the rest of the message alone. Two changes have been made: (a) I've
4967 reduced the minimum length to 35 characters; (b) if it can't find a break
4968 point between 35 and 75 characters, it looks ahead and uses the first one
4969 that it finds. This may give the occasional overlong line, but at least the
4970 remaining text gets split now.
4972 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4973 file descriptors might be low, and that setting 1000 would always raise it.
4974 It turns out that in some environments, the limit is already over 1000 and
4975 that lowering it causes trouble. So now Exim takes care not to decrease it.
4977 40. When delivering a message, the value of $return_path is set to $sender_
4978 address at the start of routing (routers may change the value). By an
4979 oversight, this default was not being set up when an address was tested by
4980 -bt or -bv, which affected the outcome if any router or filter referred to
4983 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4984 log only when "message" or "log_message" are set. However, if one of the
4985 conditions was an address verification, or a call to a nested ACL, the
4986 messages generated by the underlying test were being passed through. This
4987 no longer happens. The underlying message is available in $acl_verify_
4988 message for both "message" and "log_message" expansions, so it can be
4989 passed through if needed.
4991 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4992 new expansion $bh_ to give the encoded byte string without charset
4993 translation. Translation happens only if iconv() is available; HAVE_ICONV
4994 indicates this at build time. HEADERS_CHARSET gives the charset to
4995 translate to; headers_charset can change it in the configuration, and
4996 "headers charset" can change it in an individual filter file.
4998 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4999 that creates RFC 2047 encoded "words" labels them as that charset instead
5000 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5001 expansion operator; (ii) when Exim creates a From: line for a local
5002 message; (iii) when a header line is rewritten to include a "phrase" part.
5004 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5005 buggy, causing it to skip the first lines of messages whose message ID
5006 ended in 'D'. This would not have bitten before Exim release 4.14, because
5007 message IDs were unlikely to end in 'D' before then. The effect was to have
5008 incorrect size information for certain domains.
5010 45. #include "config.h" was missing at the start of the crypt16.c module. This
5011 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5014 46. If there was a timeout during a "random" callout check, Exim treated it as
5015 a failure of the random address, and carried on sending RSET and the real
5016 address. If the delay was just some slowness somewhere, the response to the
5017 original RCPT would be taken as a response to RSET and so on, causing
5018 mayhem of various kinds.
5020 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5021 when I implemented it. It didn't allow for the fact that some option values
5022 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5023 the right test for positive values.
5025 48. Domain names in DNS records are case-independent. Exim always looks them up
5026 in lower case. Some resolvers return domain names in exactly the case they
5027 appear in the zone file, that is, they may contain uppercase letters. Not
5028 all resolvers do this - some return always lower case. Exim was treating a
5029 change of case by a resolver as a change of domain, similar to a widening
5030 of a domain abbreviation. This triggered its re-routing code and so it was
5031 trying to route what was effectively the same domain again. This normally
5032 caused routing to fail (because the router wouldn't handle the domain
5033 twice). Now Exim checks for this case specially, and just changes the
5034 casing of the domain that it ultimately uses when it transmits the message
5037 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5040 50. If a filter generated a file delivery with a non-absolute name (possible if
5041 no home directory exists for the router), the forbid_file option was not
5044 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5045 the existing equality matching.
5047 52. Exim was using ints instead of ino_t variables in some places where it was
5048 dealing with inode numbers.
5050 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5051 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5052 called TMPDIR, and if it finds it is different, it changes its value.
5054 54. The smtp_printf() function is now made available to local_scan() so
5055 additional output lines can be written before returning. There is also an
5056 smtp_fflush() function to enable the detection of a dropped connection.
5057 The variables smtp_input and smtp_batched_input are exported to
5060 55. Changed the default runtime configuration: the message "Unknown user"
5061 has been removed from the ACL, and instead placed on the localuser router,
5062 using the cannot_route_message feature. This means that any verification
5063 failures that generate their own messages won't get overridden. Similarly,
5064 the "Unrouteable address" message that was in the ACL for unverifiable
5065 relay addresses has also been removed.
5067 56. Added hosts_avoid_esmtp to the smtp transport.
5069 57. The exicyclog script was not checking for the esoteric option
5070 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5071 will work only if exicyclog is run under the appropriate euid.
5073 58. Following a discussion on the list, the rules by which Exim recognises line
5074 endings on incoming messages have been changed. The -dropcr and drop_cr
5075 options are now no-ops, retained only for backwards compatibility. The
5076 following line terminators are recognized: LF CRLF CR. However, special
5077 processing applies to CR:
5079 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5080 nor a local message in the state where . is a terminator.
5082 (ii) If a bare CR is encountered in a header line, an extra space is added
5083 after the line terminator so as not to end the header. The reasoning
5084 behind this is that bare CRs in header lines are most likely either
5085 to be mistakes, or people trying to play silly games.
5087 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5088 was being incorrectly given as 18 bytes larger than it should have been.
5089 This is a VOB (very old bug).
5091 60. This may never have affected anything current, but just in case it has:
5092 When the local host is found other than at the start of a list of hosts,
5093 the local host, those with the same MX, and any that follow, are discarded.
5094 When the list in question was part of a longer list of hosts, the following
5095 hosts (not currently being processed) were also being discarded. This no
5096 longer happens. I'm not sure if this situation could ever has previously
5099 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5102 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5103 header. This is something that is recommended in a new Internet Draft, and
5104 is something that is documented as being done by Sendmail. There are two
5105 possible values. For messages generated by the autoreply transport, Exim
5108 Auto-Submitted: auto-replied
5110 whereas for all other generated messages (e.g. bounces) it adds
5112 Auto-Submitted: auto-generated
5114 63. The "personal" condition in filters now includes a test for the
5115 Auto-Submitted: header. If it contains the string "auto-" the message it
5116 not considered personal.
5118 64. Added rcpt_include_affixes as a generic transport option.
5120 65. Added queue_only_override (default true).
5122 66. Added the syslog_duplication option.
5124 67. If what should have been the first header line of a message consisted of
5125 a space followed by a colon, Exim was mis-interpreting it as a header line.
5126 It isn't of course - it is syntactically invalid and should therefore be
5127 treated as the start of the message body. The misbehaviour could have
5128 caused a number of strange effects, including loss of data in subsequent
5129 header lines, and spool format errors.
5131 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5132 client host had authenticated. This control can now be exercised by an ACL
5133 for more flexibility.
5135 69. By default, callouts do not happen when testing with -bh. There is now a
5136 variant, -bhc, which does actually run the callout code, including
5137 consulting and updating the callout cache.
5139 70. Added support for saslauthd authentication, courtesy of Alexander
5142 71. If statvfs() failed on the spool or log directories while checking their
5143 size for availability, Exim confusingly gave the error "space shortage".
5144 Furthermore, in debugging mode it crashed with a floating point exception.
5145 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5146 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5147 serious problem, Exim now writes to the main and panic logs when this
5148 happens, with details of the failure. It then refuses to accept the
5149 incoming message, giving the message "spool directory problem" or "log
5150 directory problem" with a 421 code for SMTP messages.
5152 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5153 0, 1, and 2 exist, because some OS complain for execs without them (see
5154 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5155 descriptors. However, the code omitted to check that the open succeeded,
5156 causing mysterious errors if for some reason the permissions on /dev/null
5157 got screwed. Now Exim writes a message to the main and panic logs, and
5158 bombs out if it can't open /dev/null.
5160 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5161 interact so that it is all more flexible. It is supposed to remain
5162 backwards compatible. Also added extra_local_interfaces.
5164 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5165 to bomb out with an assertion failure - to the client this appears as a
5166 connection drop. This problem occurs in the part of the code that was taken
5167 from the Samba project. Fortunately, the assertion is in a very simple
5168 function, so I have fixed this by reproducing the function inline in the
5169 one place where it is called, and arranging for authentication to fail
5170 instead of killing the process with assert().
5172 75. The SPA client code was not working when the server requested OEM rather
5173 than Unicode encoding.
5175 76. Added code to make require_files with a specific uid setting more usable in
5176 the case where statting the file as root fails - usually a non-root-mounted
5177 NFS file system. When this happens and the failure is EACCES, Exim now
5178 forks a subprocess and does the per-uid checking as the relevant uid.
5180 77. Added process_log_path.
5182 78. If log_file_path was not explicitly set, a setting of check_log_space or
5183 check_log_inodes was ignored.
5185 79. If a space check for the spool or log partitions fails, the incident is now
5186 logged. Of course, in the latter case the data may get lost...
5188 80. Added the %p formatting code to string_format() so that it can be used to
5189 print addresses in debug_print(). Adjusted all the address printing in the
5190 debugging in store.c to use %p rather than %d.
5192 81. There was a concern that a line of code in smtp_in.c could overflow a
5193 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5194 initially expressed, the concern was not well-founded, because trailing
5195 spaces are removed early. However, if the trailing spaces were followed by
5196 a NULL, they did not get removed, so the overflow was possible. Two fixes
5199 (a) I re-wrote the offending code in a cleaner fashion.
5200 (b) If an incoming SMTP command contains a NULL character, it is rejected
5203 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5204 runs initgroups(), so that if the Exim user is in any additional groups,
5205 they will be used during message reception.
5211 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob