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.
21 PP/01 Date: & Message-Id: revert to normally being appended to a message,
22 only prepend for the Resent-* case. Fixes regression introduced in
23 Exim 4.70 by NM/22 for Bugzilla 607.
25 PP/02 Include check_rfc2047_length in configure.default because we're seeing
26 increasing numbers of administrators be bitten by this.
28 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
30 PP/03 Bugzilla 994: added openssl_options main configuration option.
32 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
34 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
36 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
38 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
39 without a peer certificate, leading to a segfault because of an
40 assumption that peers always have certificates. Be a little more
41 paranoid. Problem reported by Martin Tscholak.
43 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
44 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
45 NB: ClamAV planning to remove STREAM in "middle of 2010".
46 CL also introduces -bmalware, various -d+acl logging additions and
47 more caution in buffer sizes.
49 PP/09 Implemented reverse_ip expansion operator.
51 PP/10 Bugzilla 937: provide a "debug" ACL control.
53 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
55 PP/12 Bugzilla 973: Implement --version.
57 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
59 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
61 PP/15 Bugzilla 816: support multiple condition rules on Routers.
63 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
64 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
65 ignore trailing whitespace.
67 JJ/02 prevent non-panic DKIM error from being sent to paniclog
69 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
72 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
73 Notification from Dr Andrew Aitchison.
75 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
76 ExtendedDetectionInfo response format.
77 Notification from John Horne.
79 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
82 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
83 XSL and documented dependency on system catalogs, with examples of how
86 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
89 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
90 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
91 configuration file which is writeable by the Exim user or group.
93 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
94 of configuration files to cover files specified with the -C option if
95 they are going to be used with root privileges, not just the default
98 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
99 option (effectively making it always true).
101 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
102 files to be used while preserving root privileges.
104 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
105 that rogue child processes cannot use them.
107 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
108 run-time user, instead of root.
110 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
111 Exim run-time user without dropping privileges.
113 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
114 result string, instead of calling string_vformat() twice with the same
117 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
118 for other users. Others should always drop root privileges if they use
119 -C on the command line, even for a whitelisted configure file.
121 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
123 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
129 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
130 $data_path, and $header_path variables; fixed documentation bugs and
133 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
134 exipick to access non-standard spools, including the "frozen" queue
137 NM/01 Bugzilla 965: Support mysql stored procedures.
138 Patch from Alain Williams
140 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
142 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
143 Patch from Andreas Metzler
145 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
146 Patch from Kirill Miazine
148 NM/05 Bugzilla 671: Added umask to procmail example.
150 JJ/03 installed exipick 20100323.0, fixing doc bug
152 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
153 directory. Notification and patch from Dan Rosenberg.
155 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
157 TK/02 Improve log output when DKIM signing operation fails.
159 MH/01 Treat the transport option dkim_domain as a colon separated
160 list, not as a single string, and sign the message with each element,
161 omitting multiple occurences of the same signer.
163 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
164 Bugzilla 985, 986. Patch by Simon Arlott
166 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
167 Patch by Simon Arlott
169 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
170 MBX locking. Notification from Dan Rosenberg.
176 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
178 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
180 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
182 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
184 NM/04 Bugzilla 915: Flag broken perl installation during build.
190 TK/01 Added patch by Johannes Berg that expands the main option
191 "spamd_address" if it starts with a dollar sign.
193 TK/02 Write list of recipients to X-Envelope-Sender header when building
194 the mbox-format spool file for content scanning (suggested by Jakob
197 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
198 (http://www.dcc-servers.net/) support via dccifd. Activated by
199 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
201 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
202 by Mark Daniel Reidel <mr@df.eu>.
204 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
205 When building exim an external PCRE library is now needed -
206 PCRE is a system library on the majority of modern systems.
207 See entry on PCRE_LIBS in EDITME file.
209 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
210 conversation. Added nologin parameter to request.
211 Patch contributed by Kirill Miazine.
213 TF/01 Do not log submission mode rewrites if they do not change the address.
215 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
217 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
218 log files in place. Contributed by Roberto Lima.
220 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
222 TF/03 Bugzilla 615: When checking the local_parts router precondition
223 after a local_part_suffix or local_part_prefix option, Exim now
224 does not use the address's named list lookup cache, since this
225 contains cached lookups for the whole local part.
227 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
228 Robert Millan. Documentation is in experimental-spec.txt.
230 TF/04 Bugzilla 668: Fix parallel build (make -j).
232 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
234 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
235 Patch provided by Jan Srzednicki.
237 TF/05 Leading white space used to be stripped from $spam_report which
238 wrecked the formatting. Now it is preserved.
240 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
241 that they are available at delivery time.
243 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
245 TF/08 TLS error reporting now respects the incoming_interface and
246 incoming_port log selectors.
248 TF/09 Produce a more useful error message if an SMTP transport's hosts
249 setting expands to an empty string.
251 NM/06 Bugzilla 744: EXPN did not work under TLS.
252 Patch provided by Phil Pennock.
254 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
255 Patch provided by Richard Godbee.
257 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
258 acl_smtp_notquit, added index entry.
260 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
261 Patch provided by Eugene Bujak.
263 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
264 accept(). Patch provided by Maxim Dounin.
266 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
267 Patch provided by Phil Pennock.
269 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
271 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
272 Patch provided by Brad "anomie" Jorsch.
274 NM/14 Bugzilla 622: Added timeout setting to transport filter.
275 Patch provided by Dean Brooks.
277 TK/05 Add native DKIM support (does not depend on external libraries).
279 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
280 Patch provided by Graeme Fowler.
282 NM/16 Bugzilla 851: Documentation example syntax fix.
284 NM/17 Changed NOTICE file to remove references to embedded PCRE.
286 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
289 NM/19 Bugzilla 745: TLS version reporting.
290 Patch provided by Phil Pennock.
292 NM/20 Bugzilla 167: bool: condition support.
293 Patch provided by Phil Pennock.
295 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
296 clients. Patch provided by Phil Pennock.
298 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
299 Patch provided by Brad "anomie" Jorsch.
301 NM/23 Bugzilla 687: Fix misparses in eximstats.
302 Patch provided by Heiko Schlittermann.
304 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
305 Patch provided by Heiko Schlittermann.
307 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
308 plus update to original patch.
310 NM/26 Bugzilla 799: Documentation correction for ratelimit.
312 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
313 Patch provided by David Brownlee.
315 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
317 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
319 NM/30 Bugzilla 888: TLS documentation bugfixes.
321 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
323 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
324 Unlike the original bugzilla I have changed all shell scripts in src tree.
326 NM/33 Bugzilla 898: Transport filter timeout fix.
327 Patch by Todd Rinaldo.
329 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
330 Patch by Serge Demonchaux.
332 NM/35 Bugzilla 39: Base64 decode bug fixes.
333 Patch by Jakob Hirsch.
335 NM/36 Bugzilla 909: Correct connect() call in dcc code.
337 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
339 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
341 NM/39 Bugzilla 911: Fixed MakeLinks build script.
347 TK/01 Add preliminary DKIM support. Currently requires a forked version of
348 ALT-N's libdkim that I have put here:
349 http://duncanthrax.net/exim-experimental/
351 Note to Michael Haardt: I had to rename some vars in sieve.c. They
352 were called 'true' and it seems that C99 defines that as a reserved
353 keyword to be used with 'bool' variable types. That means you could
354 not include C99-style headers which use bools without triggering
355 build errors in sieve.c.
357 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
358 as mailq or other aliases. Changed the --help handling significantly
359 to do whats expected. exim_usage() emits usage/help information.
361 SC/01 Added the -bylocaldomain option to eximstats.
363 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
365 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
367 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
373 PH/01 Another patch from the Sieve maintainer.
375 PH/02 When an IPv6 address is converted to a string for single-key lookup
376 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
377 dots are used instead of colons so that keys in lsearch files need not
378 contain colons. This was done some time before quoting was made available
379 in lsearch files. However, iplsearch files do require colons in IPv6 keys
380 (notated using the quote facility) so as to distinguish them from IPv4
381 keys. This meant that lookups for IP addresses in host lists did not work
382 for iplsearch lookups.
384 This has been fixed by arranging for IPv6 addresses to be expressed with
385 colons if the lookup type is iplsearch. This is not incompatible, because
386 previously such lookups could never work.
388 The situation is now rather anomolous, since one *can* have colons in
389 ordinary lsearch keys. However, making the change in all cases is
390 incompatible and would probably break a number of configurations.
392 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
395 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
396 conversion specification without a maximum field width, thereby enabling
397 a rogue spamd server to cause a buffer overflow. While nobody in their
398 right mind would setup Exim to query an untrusted spamd server, an
399 attacker that gains access to a server running spamd could potentially
400 exploit this vulnerability to run arbitrary code as the Exim user.
402 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
403 $primary_hostname instead of what libspf2 thinks the hosts name is.
405 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
406 a directory entry by the name of the lookup key. Previously, if a
407 symlink pointed to a non-existing file or a file in a directory that
408 Exim lacked permissions to read, a lookup for a key matching that
409 symlink would fail. Now it is enough that a matching directory entry
410 exists, symlink or not. (Bugzilla 503.)
412 PH/03 The body_linecount and body_zerocount variables are now exported in the
415 PH/04 Added the $dnslist_matched variable.
417 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
418 This means they are set thereafter only if the connection becomes
421 PH/06 Added the client_condition to authenticators so that some can be skipped
422 by clients under certain conditions.
424 PH/07 The error message for a badly-placed control=no_multiline_responses left
425 "_responses" off the end of the name.
427 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
429 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
430 (without spaces) instead of just copying the configuration text.
432 PH/10 Added the /noupdate option to the ratelimit ACL condition.
434 PH/11 Added $max_received_linelength.
436 PH/12 Added +ignore_defer and +include_defer to host lists.
438 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
439 way in which PCRE > 7.0 is built.
441 PH/14 Implemented queue_only_load_latch.
443 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
444 MAIL command. The effect was to mangle the value on 64-bit systems.
446 PH/16 Another patch from the Sieve maintainer.
448 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
450 PH/18 If a system quota error occurred while trying to create the file for
451 a maildir delivery, the message "Mailbox is full" was not appended to the
452 bounce if the delivery eventually timed out. Change 4.67/27 below applied
453 only to a quota excession during the actual writing of the file.
455 PH/19 It seems that peer DN values may contain newlines (and other non-printing
456 characters?) which causes problems in log lines. The DN values are now
457 passed through string_printing() before being added to log lines.
459 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
460 and InterBase are left for another time.)
462 PH/21 Added message_body_newlines option.
464 PH/22 Guard against possible overflow in moan_check_errorcopy().
466 PH/23 POSIX allows open() to be a macro; guard against that.
468 PH/24 If the recipient of an error message contained an @ in the local part
469 (suitably quoted, of course), incorrect values were put in $domain and
470 $local_part during the evaluation of errors_copy.
476 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
477 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
480 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
481 issue a MAIL command.
483 PH/02 In an ACL statement such as
485 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
487 if a client was not listed at all, or was listed with a value other than
488 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
489 the condition was not true (as it should be), so access was not denied.
490 The bug was that the ! inversion was incorrectly passed on to the second
491 item. This has been fixed.
493 PH/03 Added additional dnslists conditions == and =& which are different from
494 = and & when the dns lookup returns more than one IP address.
496 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
497 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
499 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
500 FSYNC, which compiles an option called disable_fsync that allows for
501 bypassing fsync(). The documentation is heavily laced with warnings.
503 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
505 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
506 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
507 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
508 including adding "make clean"; (3) Added -fPIC when compiling the test
509 dynamically loaded module, to get rid of a warning.
511 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
512 message fails, move_frozen_messages = true and ignore_bounce_errors_after
513 = 0s. The bug is otherwise harmless.
515 PH/07 There was a bug in the dovecot authenticator such that the value of
516 $auth1 could be overwritten, and so not correctly preserved, after a
517 successful authentication. This usually meant that the value preserved by
518 the server_setid option was incorrect.
520 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
522 PH/09 Installed PCRE release 7.0.
524 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
525 run for batched SMTP input. It is now run at the start of every message
526 in the batch. While fixing this I discovered that the process information
527 (output by running exiwhat) was not always getting set for -bs and -bS
528 input. This is fixed, and it now also says "batched" for BSMTP.
530 PH/11 Added control=no_pipelining.
532 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
533 patch, slightly modified), and move the expansion of helo_data till after
534 the connection is made in the smtp transport (so it can use these
537 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
539 PH/14 Added log_selector = +pid.
541 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
543 PH/16 Add ${if forany and ${if forall.
545 PH/17 Added dsn_from option to vary the From: line in DSNs.
547 PH/18 Flush SMTP output before performing a callout, unless control =
548 no_callout_flush is set.
550 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
551 was true (the default) a successful delivery failed to delete the retry
552 item, thus causing premature timeout of the address. The bug is now
555 PH/20 Added hosts_avoid_pipelining to the smtp transport.
557 PH/21 Long custom messages for fakedefer and fakereject are now split up
558 into multiline reponses in the same way that messages for "deny" and
559 other ACL rejections are.
561 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
562 with slight modification.
564 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
565 draft, changing the syntax and factoring some duplicate code".
567 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
568 for deliveries of the second and subsequent messages over the same SMTP
571 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
572 ${reduce, with only minor "tidies".
574 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
576 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
577 expansion side effects.
579 PH/27 When a message times out after an over-quota error from an Exim-imposed
580 quota, the bounce message says "mailbox is full". This message was not
581 being given when it was a system quota that was exceeded. It now should
584 MH/03 Made $recipients available in local_scan(). local_scan() already has
585 better access to the recipient list through recipients_list[], but
586 $recipients can be useful in postmaster-provided expansion strings.
588 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
589 in the case of a MAIL command with additional options following the
590 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
591 were accidentally chopped off.
593 PH/29 SMTP synchronization checks are implemented when a command is read -
594 there is a check that no more input is waiting when there shouldn't be
595 any. However, for some commands, a delay in an ACL can mean that it is
596 some time before the response is written. In this time, more input might
597 arrive, invalidly. So now there are extra checks after an ACL has run for
598 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
599 pipelining has not been advertised.
601 PH/30 MH's patch to allow iscntrl() characters to be list separators.
603 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
604 returned in the SMTP response when smtp_return_error_details was false.
607 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
608 instead of the C I/O that was originally supplied, because problems were
611 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
612 Exim which did not show up earlier: it was assuming that a call to
613 SSL_CTX_set_info_callback() might give an error value. In fact, there is
614 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
615 was a macro that became an assignment, so it seemed to work. This has
616 changed to a proper function call with a void return, hence the compile
617 error. Exim's code has been fixed.
619 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
622 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
624 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
626 PH/37 If a message is not accepted after it has had an id assigned (e.g.
627 because it turns out to be too big or there is a timeout) there is no
628 "Completed" line in the log. When some messages of this type were
629 selected by exigrep, they were listed as "not completed". Others were
630 picked up by some special patterns. I have improved the selection
631 criteria to be more general.
633 PH/38 The host_find_failed option in the manualroute router can now be set
634 to "ignore", to completely ignore a host whose IP address cannot be
635 found. If all hosts are ignored, the behaviour is controlled by the new
636 host_all_ignored option.
638 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
639 homing or because of multiple MX records with /mx) generated more than
640 one IP address, and the following item turned out to be the local host,
641 all the secondary addresses of the first item were incorrectly removed
642 from the list, along with the local host and any following hosts (which
643 is what is supposed to happen).
645 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
646 whoever called Exim into the -H file. In the case of the daemon it was
647 behaving confusingly. When first started, it used values for whoever
648 started the daemon, but after a SIGHUP it used the Exim user (because it
649 calls itself on a restart). I have changed the code so that it now always
652 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
653 message are rejected with the same error (e.g. no authentication or bad
654 sender address), and a DATA command is nevertheless sent (as can happen
655 with PIPELINING or a stupid MUA), the error message that was given to the
656 RCPT commands is included in the rejection of the DATA command. This is
657 intended to be helpful for MUAs that show only the final error to their
660 PH/42 Another patch from the Sieve maintainer.
662 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
663 Eximstats - Fixed some broken HTML links and added missing column headers
665 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
666 columns for Rejects, Temp Rejects, Ham, and Spam rows.
668 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
670 PH/43 Yet another patch from the Sieve maintainer.
672 PH/44 I found a way to check for a TCP/IP connection going away before sending
673 the response to the final '.' that terminates a message, but only in the
674 case where the client has not sent further data following the '.'
675 (unfortunately, this is allowed). However, in many cases there won't be
676 any further data because there won't be any more messages to send. A call
677 to select() can be used: if it shows that the input is "ready", there is
678 either input waiting, or the socket has been closed. An attempt to read
679 the next input character can distinguish the two cases. Previously, Exim
680 would have sent an OK response which the client would never have see.
681 This could lead to message repetition. This fix should cure that, at
682 least in a lot of common cases.
684 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
685 advertised in response to EHLO.
691 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
692 fixed by 4.65/MH/01 (is this a record?) are fixed:
694 (i) An empty string was always treated as zero by the numeric comparison
695 operators. This behaviour has been restored.
697 (ii) It is documented that the numeric comparison operators always treat
698 their arguments as decimal numbers. This was broken in that numbers
699 starting with 0 were being interpreted as octal.
701 While fixing these problems I realized that there was another issue that
702 hadn't been noticed. Values of message_size_limit (both the global option
703 and the transport option) were treated as octal if they started with 0.
704 The documentation was vague. These values are now always treated as
705 decimal, and I will make that clear in the documentation.
711 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
712 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
715 MH/01 Don't check that the operands of numeric comparison operators are
716 integers when their expansion is in "skipping" mode (fixes bug
717 introduced by 4.64-PH/07).
719 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
720 child addresses, Exim now panics and dies. Previously, because the count
721 is held in a short int, deliveries were likely to be lost. As such a
722 large number of recipients for a single message is ridiculous
723 (performance will be very, very poor), I have chosen to impose a limit
724 rather than extend the field.
730 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
731 leftover -K file (the existence of which was triggered by #402).
732 While we were at it, introduced process PID as part of the -K
733 filename. This should rule out race conditions when creating
736 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
737 processing considerably. Previous code took too long for large mails,
738 triggering a timeout which in turn triggers #401.
740 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
741 in the DK code in transports.c. sendfile() is not really portable,
742 hence the _LINUX specificness.
744 TF/01 In the add_headers option to the mail command in an Exim filter,
745 there was a bug that Exim would claim a syntax error in any
746 header after the first one which had an odd number of characters
749 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
750 callout verification, Exim cached a "reject" for the entire domain. This
751 is correct for most verifications, but it is not correct for a recipient
752 verification with use_sender or use_postmaster set, because in that case
753 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
754 case of MAIL FROM:<> rejection from other early rejections (e.g.
755 rejection of HELO). When verifying a recipient using a non-null MAIL
756 address, the cache is ignored if it shows MAIL FROM:<> rejection.
757 Whatever the result of the callout, the value of the domain cache is
758 left unchanged (for any other kind of callout, getting as far as trying
759 RCPT means that the domain itself is ok).
761 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
764 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
765 manifest itself as EPIPE rather than ECONNECT. When tidying away a
766 session, the daemon ignores ECONNECT errors and logs others; it now
767 ignores EPIPE as well.
769 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
770 (quoted-printable decoding).
772 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
773 later the small subsequent patch to fix an introduced bug.
775 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
777 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
779 PH/08 An error is now given if message_size_limit is specified negative.
781 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
782 to be given (somewhat) arbitrary names.
784 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
787 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
788 miscellaneous code fixes
790 PH/10 Added the log_reject_target ACL modifier to specify where to log
793 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
794 hostname. This is wrong, because it relates to the incoming message (and
795 probably the interface on which it is arriving) and not to the outgoing
796 callout (which could be using a different interface). This has been
797 changed to use the value of the helo_data option from the smtp transport
798 instead - this is what is used when a message is actually being sent. If
799 there is no remote transport (possible with a router that sets up host
800 addresses), $smtp_active_hostname is used.
802 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
803 tweaks were necessary in order to get it to work (see also 21 below):
804 (a) The code assumed that strncpy() returns a negative number on buffer
805 overflow, which isn't the case. Replaced with Exim's string_format()
807 (b) There were several signed/unsigned issues. I just did the minimum
808 hacking in of casts. There is scope for a larger refactoring.
809 (c) The code used strcasecmp() which is not a standard C function.
810 Replaced with Exim's strcmpic() function.
811 (d) The code set only $1; it now sets $auth1 as well.
812 (e) A simple test gave the error "authentication client didn't specify
813 service in request". It would seem that Dovecot has changed its
814 interface. Fortunately there's a specification; I followed it and
815 changed what the client sends and it appears to be working now.
817 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
820 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
821 address A is aliased to B and C, where B exists and C does not. Without
822 -v the output is "A verified" because verification stops after a
823 successful redirection if more than one address is generated. However,
824 with -v the child addresses are also verified. Exim was outputting "A
825 failed to verify" and then showing the successful verification for C,
826 with its parentage. It now outputs "B failed to verify", showing B's
827 parentage before showing the successful verification of C.
829 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
830 look up a TXT record in a specific list after matching in a combined
833 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
834 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
835 they consult the DNS. I had assumed they would set it the way they
836 wanted; and indeed my experiments on Linux seem to show that in some
837 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
838 To be on the safe side, however, I have now made the interface to
839 host_find_byname() similar to host_find_bydns(), with an argument
840 containing the DNS resolver options. The host_find_byname() function now
841 sets these options at its start, just as host_find_bydns() does. The smtp
842 transport options dns_qualify_single and dns_search_parents are passed to
843 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
844 of host_find_byname() use the default settings of RES_DEFNAMES
845 (qualify_single) but not RES_DNSRCH (search_parents).
847 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
848 spool_read_header() do less string testing, by means of a preliminary
849 switch on the second character of optional "-foo" lines. (This is
850 overdue, caused by the large number of possibilities that now exist.
851 Originally there were few.) While I was there, I also converted the
852 str(n)cmp tests so they don't re-test the leading "-" and the first
853 character, in the hope this might squeeze out yet more improvement.
855 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
856 flag allowing group syntax was set by the header_syntax check but not
857 turned off, possible causing trouble later; (2) The flag was not being
858 set at all for the header_verify test, causing "group"-style headers to
859 be rejected. I have now set it in this case, and also caused header_
860 verify to ignore an empty address taken from a group. While doing this, I
861 came across some other cases where the code for allowing group syntax
862 while scanning a header line wasn't quite right (mostly, not resetting
863 the flag correctly in the right place). These bugs could have caused
864 trouble for malformed header lines. I hope it is now all correct.
866 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
867 with the "reply" argument non-NULL. The code, however (which originally
868 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
869 but it didn't always do it. This confused somebody who was copying the
870 code for some other use. I have removed all the tests.
872 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
873 feature that was used to support insecure browsers during the U.S. crypto
874 embargo. It requires special client support, and Exim is probably the
875 only MTA that supported it -- and would never use it because real RSA is
876 always available. This code has been removed, because it had the bad
877 effect of slowing Exim down by computing (never used) parameters for the
878 RSA_EXPORT functionality.
880 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
881 authenticator to fail if there's a tab character in the incoming data
882 (there should never be unless someone is messing about, as it's supposed
883 to be base64-encoded). Also added, on Timo's advice, the "secured" option
884 if the connection is using TLS or if the remote IP is the same as the
885 local IP, and the "valid-client-cert option" if a client certificate has
888 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
889 authenticators. This can be used for authorization after authentication
890 succeeds. (In the case of plaintext, it servers for both authentication
893 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
894 if any retry times were supplied.
896 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
897 connection, where there is no client IP address to check. In this
898 situation, the verify now always succeeds.
900 PH/25 Applied John Jetmore's -Mset patch.
902 PH/26 Added -bem to be like -Mset, but loading a message from a file.
904 PH/27 In a string expansion for a processed (not raw) header when multiple
905 headers of the same name were present, leading whitespace was being
906 removed from all of them, but trailing whitespace was being removed only
907 from the last one. Now trailing whitespace is removed from each header
908 before concatenation. Completely empty headers in a concatenation (as
911 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
912 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
914 PH/29 [Removed. This was a change that I later backed out, and forgot to
915 correct the ChangeLog entry (that I had efficiently created) before
916 committing the later change.]
918 PH/30 Exim was sometimes attempting to deliver messages that had suffered
919 address errors (4xx response to RCPT) over the same connection as other
920 messages routed to the same hosts. Such deliveries are always "forced",
921 so retry times are not inspected. This resulted in far too many retries
922 for the affected addresses. The effect occurred only when there were more
923 hosts than the hosts_max_try setting in the smtp transport when it had
924 the 4xx errors. Those hosts that it had tried were not added to the list
925 of hosts for which the message was waiting, so if all were tried, there
926 was no problem. Two fixes have been applied:
928 (i) If there are any address or message errors in an SMTP delivery, none
929 of the hosts (tried or untried) are now added to the list of hosts
930 for which the message is waiting, so the message should not be a
931 candidate for sending over the same connection that was used for a
932 successful delivery of some other message. This seems entirely
933 reasonable: after all the message is NOT "waiting for some host".
934 This is so "obvious" that I'm not sure why it wasn't done
935 previously. Hope I haven't missed anything, but it can't do any
936 harm, as the worst effect is to miss an optimization.
938 (ii) If, despite (i), such a delivery is accidentally attempted, the
939 routing retry time is respected, so at least it doesn't keep
940 hammering the server.
942 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
943 in ${readsocket because some servers need this prod.
945 PH/32 Added some extra debug output when updating a wait-xxx database.
947 PH/33 The hint "could be header name not terminated by colon", which has been
948 given for certain expansion errors for a long time, was not being given
949 for the ${if def:h_colon_omitted{... case.
951 PH/34 The spec says: "With one important exception, whenever a domain list is
952 being scanned, $domain contains the subject domain." There was at least
953 one case where this was not true.
955 PH/35 The error "getsockname() failed: connection reset by peer" was being
956 written to the panic log as well as the main log, but it isn't really
957 panic-worthy as it just means the connection died rather early on. I have
958 removed the panic log writing for the ECONNRESET error when getsockname()
961 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
962 runs only) independently of the message's sender address. This meant
963 that, if the 4xx error was in fact related to the sender, a different
964 message to the same recipient with a different sender could confuse
965 things. In particualar, this can happen when sending to a greylisting
966 server, but other circumstances could also provoke similar problems.
967 I have changed the default so that the retry time for these errors is now
968 based a combination of the sender and recipient addresses. This change
969 can be overridden by setting address_retry_include_sender=false in the
972 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
973 remote server are returned as part of bounce messages. This was not
974 happening for LMTP over a pipe (the lmtp transport), but now it is the
975 same for both kinds of LMTP.
977 PH/38 Despite being documented as not happening, Exim was rewriting addresses
978 in header lines that were in fact CNAMEs. This is no longer the case.
980 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
981 and queue runs started by the daemon processed all messages. This has
982 been fixed so that -R and -S can now usefully be given with -q<time>.
984 PH/40 Import PCRE release 6.7 (fixes some bugs).
986 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
988 PH/42 Give an error if -q is specified more than once.
990 PH/43 Renamed the variables $interface_address and $interface_port as
991 $received_ip_address and $received_port, to make it clear that these
992 values apply to message reception, and not to the outgoing interface when
993 a message is delivered. (The old names remain recognized, of course.)
995 PH/44 There was no timeout on the connect() call when using a Unix domain
996 socket in the ${readsocket expansion. There now is.
998 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
999 be meaningful with "accept".
1001 SC/01 Eximstats V1.43
1002 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1004 SC/02 Eximstats V1.44
1005 Use a glob alias rather than an array ref in the generated
1006 parser. This improves both readability and performance.
1008 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1009 Collect SpamAssassin and rejection statistics.
1010 Don't display local sender or destination tables unless
1011 there is data to show.
1012 Added average volumes into the top table text output.
1014 SC/04 Eximstats V1.46
1015 Collect data on the number of addresses (recipients)
1016 as well as the number of messages.
1018 SC/05 Eximstats V1.47
1019 Added 'Message too big' to the list of mail rejection
1020 reasons (thanks to Marco Gaiarin).
1022 SC/06 Eximstats V1.48
1023 Mainlog lines which have GMT offsets and are too short to
1024 have a flag are now skipped.
1026 SC/07 Eximstats V1.49 (Alain Williams)
1027 Added the -emptyok flag.
1029 SC/08 Eximstats V1.50
1030 Fixes for obtaining the IP address from reject messages.
1032 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1033 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1034 whitesspace changes from 4.64-PH/27
1036 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1039 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1040 are found, allow negative numbers in numeric criteria)
1042 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1044 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1045 to match changes made in 4.64-PH/43
1047 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1049 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1050 "domain" is actually an IP address, and force a failure. This locks out
1051 those revolvers/nameservers that support "A-for-A" lookups, in
1052 contravention of the specifications.
1054 PH/48 When a host name was looked up from an IP address, and the subsequent
1055 forward lookup of the name timed out, the host name was left in
1056 $sender_host_name, contrary to the specification.
1058 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1059 restricted to single-key lookups, Exim was not diagnosing an error if
1060 * or *@ was used with a query-style lookup.
1062 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1064 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1065 long ago, but noone interested enough thought of it. Let's just say that
1066 the "1.1" means that there are some new functions that weren't there at
1067 some point in the past.
1069 PH/51 Error processing for expansion failure of helo_data from an smtp
1070 transport during callout processing was broken.
1072 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1073 tested/used via the -bh/-bhc/-bs options.
1075 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1076 bug, fixed in subsequent PCRE releases).
1078 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1079 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1081 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1087 SC/01 Use a glob alias rather than an array ref in eximstats generated
1088 parser. This improves both readability and performance.
1090 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1091 Don't display local sender or destination tables in eximstats unless
1092 there is data to show.
1093 Added average volumes into the eximstats top table text output.
1095 SC/03 Collect data on the number of addresses (recipients) as well
1096 as the number of messages in eximstats.
1098 TF/01 Correct an error in the documentation for the redirect router. Exim
1099 does (usually) call initgroups() when daemonizing.
1101 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1102 with consistent privilege compared to when running as a daemon.
1104 TF/03 Note in the spec that $authenticated_id is not set for local
1105 submissions from trusted users.
1107 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1108 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1110 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1111 by adding some example configuration directives to the default
1112 configuration file. A little bit of work is required to uncomment the
1113 directives and define how usernames and passwords are checked, but
1114 there is now a framework to start from.
1116 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1117 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1118 without this. I don't know how relevant this is to other LDAP libraries.
1120 PH/02 Add the verb name to the "unknown ACL verb" error.
1122 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1124 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1126 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1127 directory not expanded when it should be if an expanded home directory
1128 was set for the address (which is overridden by the transport).
1130 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1133 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1134 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1135 because it is too late at that time, and has no effect.
1137 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1138 security issue with \' (bugzilla #107). I could not use the
1139 PQescapeStringConn() function, because it needs a PGconn value as one of
1142 PH/08 When testing addresses using -bt, indicate those final addresses that
1143 are duplicates that would not cause an additional delivery. At least one
1144 person was confused, thinking that -bt output corresponded to deliveries.
1145 (Suppressing duplicates isn't a good idea as you lose the information
1146 about possibly different redirections that led to the duplicates.)
1148 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1149 systems where poll() doesn't work, in particular OS X.
1151 PH/10 Added more information to debugging output for retry time not reached.
1153 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1154 operations in malware.c.
1156 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1159 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1160 syslog_duplication set false, log lines that would normally be written
1161 both the the main log and to the reject log were not written to syslog at
1164 PH/14 In the default configuration, change the use of "message" in ACL warn
1165 statements to "add_header".
1167 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1168 not followed by a command (e.g. "seen endif").
1170 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1171 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1174 PH/17 Added extra conditions to the default value of delay_warning_condition
1178 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1179 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1180 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1183 The Auto-Submitted: and various List- headers are standardised, whereas I
1184 don't think Precedence: ever was.
1186 PH/18 Refactored debugging code in route_finduser() to show more information,
1187 in particular, the error code if getpwnam() issues one.
1189 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1190 This is apparently needed in addition to the PH/07 change above to avoid
1191 any possible encoding problems.
1193 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1194 but not after initializing Perl.
1196 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1197 output them only if debugging. By default they are written stderr,
1198 apparently, which is not desirable.
1200 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1203 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1206 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1208 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1209 authenticated or an ident call has been made. Suppress the default
1210 values for $authenticated_id and $authenticated_sender (but permit -oMai
1211 and -oMas) when testing with -bh.
1213 PH/24 Re-jigged the order of the tests in the default configuration so that the
1214 tests for valid domains and recipients precede the DNS black list and CSA
1215 tests, on the grounds that those ones are more expensive.
1217 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1218 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1219 This bug exists in every version of Exim that I still have, right back to
1222 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1223 However, an attempt to turn on case-sensitivity in a regex key by
1224 including (?-i) didn't work because the subject string was already
1225 lowercased, and the effects were non-intuitive. It turns out that a
1226 one-line patch can be used to allow (?-i) to work as expected.
1232 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1233 other effects) broke the use of negated acl sub-conditions.
1235 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1238 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1239 "Deny" causes Exim to reject the incoming connection with a 554 error.
1240 Unfortunately, if there is a major crisis, such as a disk failure,
1241 tcp-wrappers gives "deny", whereas what one would like would be some
1242 kind of temporary error. A kludge has been added to help with this.
1243 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1244 554 error is used if errno is still zero or contains ENOENT (which occurs
1245 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1248 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1250 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1251 errors. Otherwise a message that provokes a temporary error (when other
1252 messages do not) can cause a whole host to time out.
1254 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1255 addresses were routed directly to files or pipes from a redirect router.
1256 File deliveries just didn't batch; pipe deliveries might have suffered
1259 PH/06 A failure to get a lock for a hints database would erroneously always say
1260 "Failed to get write lock", even when it was really a read lock.
1262 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1263 of 0600. This has been changed to use the value of the lockfile_mode
1264 option (which defaults to 0600).
1266 PH/08 Applied small patch from the Sieve maintainer.
1268 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1269 folder from quota calculations, a direct delivery into this folder messed
1270 up the contents of the maildirsize file. This was because the regex was
1271 used only to exclude .Trash (or whatever) when the size of the mailbox
1272 was calculated. There was no check that a delivery was happening into an
1273 excluded directory. This bug has been fixed by ignoring all quota
1274 processing for deliveries into excluded directories.
1276 PH/10 Added the maildirfolder_create_regex option to appendfile.
1282 PH/01 The code for finding all the local interface addresses on a FreeBSD
1283 system running IPv6 was broken. This may well have applied to all BSD
1284 systems, as well as to others that have similar system calls. The broken
1285 code found IPv4 interfaces correctly, but gave incorrect values for the
1286 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1287 that it would not match correctly against @[] and not recognize the IPv6
1290 PH/02 The ipliteral router was not recognizing addresses of the form user@
1291 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1293 PH/03 Added disable_ipv6.
1295 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1296 decoded form, because it is most often used to construct To: headers
1297 lines in autoreplies, and the decoded form may well be syntactically
1298 invalid. However, $reply_address has leading white space removed, and all
1299 newlines turned into spaces so that the autoreply transport does not
1302 PH/05 If group was specified without a user on a router, and no group or user
1303 was specified on a transport, the group from the router was ignored.
1305 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1306 for visible compile-time settings that can be used to change these
1307 numbers, for those that want even more. Backwards compatibility with old
1308 spool files has been maintained. However, going back to a previous Exim
1309 release will lost any variables that are in spool files.
1311 PH/07 Two small changes when running in the test harness: increase delay when
1312 passing a TCP/IP connection to a new process, in case the original
1313 process has to generate a bounce, and remove special handling of
1314 127.0.0.2 (sic), which is no longer necessary.
1316 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1317 be the same on different OS.
1319 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1322 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1323 whether --show-vars was specified or not
1325 JJ/02 exipick: Added support for new ACL variable spool format introduced
1328 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1329 syntactically invalid From: or Reply-to: line, and a filter used this to
1330 generate an autoreply, and therefore failed to obtain an address for the
1331 autoreply, Exim could try to deliver to a non-existent relative file
1332 name, causing unrelated and misleading errors. What now happens is that
1333 it logs this as a hard delivery error, but does not attempt to create a
1336 PH/11 The exinext utility has a -C option for testing purposes, but although
1337 the given file was scanned by exinext itself; it wasn't being passed on
1338 when Exim was called.
1340 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1341 an end-of-file indication when reading a command response.
1343 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1344 compiled. In many other places in Exim, IPv6 addresses are always
1345 recognized, so I have changed this. It also means that IPv4 domain
1346 literals of the form [IPV4:n.n.n.n] are now always recognized.
1348 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1349 used if the router is not running as root, for example, when verifying at
1350 ACL time, or when using -bh. The debugging output from this situation was
1351 non-existent - all you got was a failure to exec. I have made two
1354 (a) Failures to set uid/gid, the current directory, or a process leader
1355 in a subprocess such as that created by queryprogram now generate
1356 suitable debugging ouput when -d is set.
1358 (b) The queryprogram router detects when it is not running as root,
1359 outputs suitable debugging information if -d is set, and then runs
1360 the subprocess without attempting to change uid/gid.
1362 PH/15 Minor change to Makefile for building test_host (undocumented testing
1365 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1366 additional section of a DNS packet that returns MX or SRV records.
1367 Instead, it always explicitly searches for A/AAAA records. This avoids
1368 major problems that occur when a DNS server includes only records of one
1369 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1370 fixed another bug: if SRV records were looked up and the corresponding
1371 address records were *not* found in the additional section, the port
1372 values from the SRV records were lost.
1374 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1375 using the correct key (the original address) when searching the retry
1376 rules in order to find which one to use for generating the retry hint.
1378 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1379 adding the default one. Similarly, if it contains a Reply-To: header, the
1380 errors_reply_to option, if set, is not used.
1382 PH/19 When calculating a retry time, Exim used to measure the "time since
1383 failure" by looking at the "first failed" field in the retry record. Now
1384 it does not use this if it is later than than the arrival time of the
1385 message. Instead it uses the arrival time. This makes for better
1386 behaviour in cases where some deliveries succeed, thus re-setting the
1387 "first failed" field. An example is a quota failure for a huge message
1388 when small messages continue to be delivered. Without this change, the
1389 "time since failure" will always be short, possible causing more frequent
1390 delivery attempts for the huge message than are intended.
1391 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1393 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1394 $1, $2, $3) because the numerical variables can be reset during some
1395 expansion items (e.g. "match"), thereby losing the authentication data.
1397 PH/21 Make -bV show the size of off_t variables so that the test suite can
1398 decide whether to run tests for quotas > 2G.
1400 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1401 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1402 filecount value is greater than 2G or if a quota value is greater than 2G
1403 on a system where the size of off_t is not greater than 4, a panic error
1406 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1407 never match. The debug and -bh output now contains an explicit error
1408 message indicating a malformed IPv4 address or mask.
1410 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1411 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1412 PH/23 above applies.
1414 PH/25 Do not write to syslog when running in the test harness. The only
1415 occasion when this arises is a failure to open the main or panic logs
1416 (for which there is an explicit test).
1418 PH/26 Added the /no_tell option to "control=freeze".
1420 PH/27 If a host name lookup failed very early in a connection, for example, if
1421 the IP address matched host_lookup and the reverse lookup yielded a name
1422 that did not have a forward lookup, an error message of the form "no IP
1423 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1424 could be logged. Now it outputs the IP address instead of "NULL".
1426 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1427 allows the sender and the authenticated sender to be set when
1428 submitting a message from within Exim. Since child_open_exim() is
1429 documented for local_scan(), the new function should be too.
1431 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1432 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1433 results in an empty string is now treated as unset.
1435 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1437 PH/31 Added sender_verify_fail logging option.
1439 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1440 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1441 tidied the source and removed it altogether.
1443 PH/33 When a queue run was abandoned because the load average was too high, a
1444 log line was always written; now it is written only if the queue_run log
1445 selector is set. In addition, the log line for abandonment now contains
1446 information about the queue run such as the pid. This is always present
1447 in "start" and "stop" lines but was omitted from the "abandon" line.
1449 PH/34 Omit spaces between a header name and the colon in the error message that
1450 is given when verify = headers_syntax fails (if there are lots of them,
1451 the message gets confusing).
1453 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1454 names, as there are now some PTR records that contain slashes. This check
1455 is only to protect against broken name servers that fall over on strange
1456 characters, so the fact that it applies to all lookups doesn't matter.
1458 PH/36 Now that the new test suite is complete, we can remove some of the
1459 special code in Exim that was needed for the old test suite. For example,
1460 sorting DNS records because real resolvers return them in an arbitrary
1461 order. The new test suite's fake resolver always returns records in the
1464 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1465 bounces) except when queue_only is set, to avoid logging races between
1466 the different processes.
1468 PH/38 Panic-die if .include specifies a non-absolute path.
1470 PH/39 A tweak to the "H" retry rule from its user.
1472 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1473 a label. They prevented compilation on older perls.
1475 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1476 a warning to be raised on newish perls.
1478 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1479 on queue. Changes to match documented behaviour of showing count of
1480 messages matching specified criteria.
1482 PH/40 Changed the default ident timeout from 30s to 5s.
1484 PH/41 Added support for the use of login_cap features, on those BSD systems
1485 that have them, for controlling the resources used by pipe deliveries.
1487 PH/42 The content-scanning code uses fopen() to create files in which to put
1488 message data. Previously it was not paying any attention to the mode of
1489 the files. Exim runs with umask(0) because the rest of the code creates
1490 files with open(), and sets the required mode explicitly. Thus, these
1491 files were ending up world-writeable. This was not a big issue, because,
1492 being within the spool directory, they were not world-accessible. I have
1493 created a function called modefopen, which takes an additional mode
1494 argument. It sets umask(777), creates the file, chmods it to the required
1495 mode, then resets the umask. All the relevant calls to fopen() in the
1496 content scanning code have been changed to use this function.
1498 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1499 to 24 hours. This avoids potential overflow problems when processing G
1500 and H retry rules. I suspect nobody ever tinkers with this value.
1502 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1504 PH/45 When the plaintext authenticator is running as a client, the server's
1505 challenges are checked to ensure they are valid base64 strings. By
1506 default, the authentication attempt is cancelled if an invalid string is
1507 received. Setting client_ignore_invalid_base64 true ignores these errors.
1508 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1509 they are received. Thus, the responses can be made to depend on the
1510 challenges. If an invalid string is ignored, an empty string is placed in
1513 PH/46 Messages that are created by the autoreply transport now contains a
1514 References: header, in accordance with RFCs 2822 and 3834.
1516 PH/47 Added authenticated_sender_force to the smtp transport.
1518 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1520 PH/49 Installed latest patch from the Sieve maintainer.
1522 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1523 was also set, the appendfile transport was unnecessarily scanning a
1524 directory of message files (e.g. for maildir delivery) to find the count
1525 of files (along with the size), even though it did not need this
1526 information. It now does the scan only if it needs to find either the
1527 size of the count of files.
1529 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1531 PH/52 Two bugs concerned with error handling when the smtp transport is
1534 (i) Exim was not creating retry information for temporary errors given
1535 for individual recipients after the DATA command when the smtp transport
1536 was used in LMTP mode. This meant that they could be retried too
1537 frequently, and not timed out correctly.
1539 (ii) Exim was setting the flag that allows error details to be returned
1540 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1541 recipients that were returned after the DATA command.
1543 PH/53 This is related to PH/52, but is more general: for any failing address,
1544 when detailed error information was permitted to be returned to the
1545 sender, but the error was temporary, then after the final timeout, only
1546 "retry timeout exceeded" was returned. Now it returns the full error as
1547 well as "retry timeout exceeded".
1549 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1550 do this, and (what is worse) MTAs that accept it.
1552 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1553 will now be deprecated.
1555 PH/56 New os.c-cygwin from the Cygwin maintainer.
1557 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1558 formats (previously only available in exim formats via -bpr, -bpru,
1559 and -bpra. Now also available in native and exiqgrep formats)
1561 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1562 with very large, slow to parse queues
1564 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1566 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1568 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1569 responses to authentication challenges, though it was showing the
1570 challenges; (ii) I've removed the CR characters from the debug output for
1573 PH/58 Allow for the insertion of a newline as well as a space when a string
1574 is turned into more than one encoded-word during RFC 2047 encoding. The
1575 Sieve code now uses this.
1577 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1578 data_4xx, lost_connection, tls_required.
1580 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1581 message was being sent as an SMTP response.
1583 PH/61 Add -l and -k options to exicyclog.
1585 PH/62 When verifying, if an address was redirected to one new address, so that
1586 verification continued, and the new address failed or deferred after
1587 having set something in $address_data, the value of $address_data was not
1588 passed back to the ACL. This was different to the case when no
1589 redirection occurred. The value is now passed back in both cases.
1591 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1592 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1593 use login_cap.h, so on its own it isn't the distinguishing feature. The
1594 new name refers directly to the setclassresources() function.
1596 PH/65 Added configuration files for NetBSD3.
1598 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1600 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1601 is preferred over IPv4.
1603 PH/68 The bounce_return_message and bounce_return_body options were not being
1604 honoured for bounces generated during the reception of non-SMTP messages.
1605 In particular, this applied to messages rejected by the ACL. This bug has
1606 been fixed. However, if bounce_return_message is true and bounce_return_
1607 body is false, the headers that are returned for a non-SMTP message
1608 include only those that have been read before the error was detected.
1609 (In the case of an ACL rejection, they have all been read.)
1611 PH/69 The HTML version of the specification is now built in a directory called
1612 spec_html instead of spec.html, because the latter looks like a path with
1613 a MIME-type, and this confuses some software.
1615 PH/70 Catch two compiler warnings in sieve.c.
1617 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1618 function verify_get_ident() calls ip_connect() to connect a socket, but
1619 if the "connect()" function timed out, ip_connect() used to close the
1620 socket. However, verify_get_ident() also closes the socket later, and in
1621 between Exim writes to the log, which may get opened at this point. When
1622 the socket was closed in ip_connect(), the log could get the same file
1623 descriptor number as the socket. This naturally causes chaos. The fix is
1624 not to close the socket in ip_connect(); the socket should be closed by
1625 the function that creates it. There was only one place in the code where
1626 this was missing, in the iplookup router, which I don't think anybody now
1627 uses, but I've fixed it anyway.
1629 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1630 well as to direct DNS lookups. Otherwise the handling of names in host
1631 lists is inconsistent and therefore confusing.
1637 PH/01 Two changes to the default runtime configuration:
1639 (1) Move the checks for relay_from_hosts and authenticated clients from
1640 after to before the (commented out) DNS black list checks.
1642 (2) Add control=submission to the relay_from_hosts and authenticated
1643 clients checks, on the grounds that messages accepted by these
1644 statements are most likely to be submissions.
1646 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1648 (1) Generate an error if the third argument for the ${prvs expansion is
1651 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1654 (3) Reset the variables that are obtained from the first argument of
1655 ${prvscheck and used in the second argument before leaving the code,
1656 because their memory is reclaimed, so using them afterwards may do
1659 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1660 one (it's much easier than Tom thought :-).
1662 (5) Because of (4), we can now allow for the use of $prvscheck_result
1663 inside the third argument.
1665 PH/03 For some reason, the default setting of PATH when running a command from
1666 a pipe transport was just "/usr/bin". I have changed it to
1669 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1670 anything to be listed in the output from -bV.
1672 PH/05 When a filter generated an autoreply, the entire To: header line was
1673 quoted in the delivery log line, like this:
1675 => >A.N.Other <ano@some.domain> <original@ddress> ...
1677 This has been changed so that it extracts the operative address. There
1678 may be more than one such address. If so, they are comma-separated, like
1681 => >ano@some.domain,ona@other.domain <original@ddress> ...
1683 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1684 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1685 not being looked up in the rDNS to get a host name, Exim was showing the
1686 IP address twice in Received: lines, even though the IP addresses were
1687 identical. For example:
1689 Received: from [1.2.3.4] (helo=[1.2.3.4])
1691 However, if the real host name was known, it was omitting the HELO data
1692 if it matched the actual IP address. This has been tidied up so that it
1693 doesn't show the same IP address twice.
1695 PH/07 When both +timestamp and +memory debugging was on, the value given by
1696 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1697 called by the debug printing, thereby overwriting the timestamp buffer.
1698 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1700 PH/08 When the original message was included in an autoreply transport, it
1701 always said "this is a copy of the message, including all the headers",
1702 even if body_only or headers_only was set. It now gives an appropriate
1705 PH/09 Applied a patch from the Sieve maintainer which:
1707 o fixes some comments
1708 o adds the (disabled) notify extension core
1709 o adds some debug output for the result of if/elsif tests
1710 o points to the current vacation draft in the documentation
1711 and documents the missing references header update
1715 o fixes a bug in processing the envelope test (when testing
1716 multiple envelope elements, the last element determinted the
1719 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1720 Electronic Mail") by including:
1722 Auto-submitted: auto-generated
1724 in the messages that it generates (bounce messages and others, such as
1725 warnings). In the case of bounce messages for non-SMTP mesages, there was
1726 also a typo: it was using "Auto_submitted" (underscore instead of
1727 hyphen). Since every message generated by Exim is necessarily in response
1728 to another message, thes have all been changed to:
1730 Auto-Submitted: auto-replied
1732 in accordance with these statements in the RFC:
1734 The auto-replied keyword:
1736 - SHOULD be used on messages sent in direct response to another
1737 message by an automatic process,
1739 - MUST NOT be used on manually-generated messages,
1741 - MAY be used on Delivery Status Notifications (DSNs) and Message
1742 Disposition Notifications (MDNs),
1744 - MUST NOT be used on messages generated by automatic or periodic
1745 processes, except for messages which are automatic responses to
1748 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1749 to the default Received: header definition.
1751 PH/12 Added log selector acl_warn_skipped (default on).
1753 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1754 variables because (a) they are in the wrong storage pool and (b) even if
1755 they were copied, it wouldn't work properly because of the caching.
1757 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1758 checking when decoding. Apparently there are clients that generate
1759 overlong encoded strings. Why am I not surprised?
1761 PH/15 If the first argument of "${if match_address" was not empty, but did not
1762 contain an "@" character, Exim crashed. Now it writes a panic log message
1763 and treats the condition as false.
1765 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1767 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1768 extension "envelope-auth". The code is finished and in agreement with
1769 other implementations, but there is no documentation so far and in fact,
1770 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1771 not changing the active code.
1773 Print executed "if" and "elsif" statements when debugging is used. This
1774 helps a great deal to understand what a filter does.
1776 Document more things not specified clearly in RFC3028. I had all this
1777 sorted out, when out of a sudden new issues came to my mind. Oops."
1779 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1782 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1783 canonical form (as documented). However, after a host name lookup from
1784 the IP address, check_host() was doing a simple string comparison with
1785 addresses acquired from the DNS when checking that the found name did
1786 have the original IP as one of its addresses. Since any found IPv6
1787 addresses are likely to be in abbreviated form, the comparison could
1788 fail. Luckily, there already exists a function for doing the comparison
1789 by converting both addresses to binary, so now that is used instead of
1790 the text comparison.
1792 PH/20 There was another similar case to PH/19, when a complete host name was
1793 given in a host list; looking up its IP address could give an abbreviated
1794 form, whereas the current host's name might or might not be abbreviated.
1795 The same fix has been applied.
1801 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1802 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1805 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1806 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1808 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1810 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1811 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1812 Also, for "Auto-Submitted", treat anything other than "no" as
1813 non-personal, in accordance with RFC 3834. (Previously it treated
1814 anything starting "auto-" as non-personal.)
1816 TF/01 The control=submission/name=... option had a problem with syntax
1817 errors if the name included a slash character. The /name= option
1818 now slurps the rest of the string, so it can include any characters
1819 but it must come last in the list of options (after /sender_retain
1822 PH/05 Some modifications to the interface to the fake nameserver for the new
1830 TK/01 Added the "success_on_redirect" address verification option. See
1831 NewStuff for rationale and an example.
1833 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1835 PH/02 Patch to exigrep to allow it to work on syslog lines.
1837 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1838 fread() to skip over the body file's header line, because in Cygwin the
1839 header line is locked and is inaccessible.
1841 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1842 co-exist for some time) to make it clear that it is the Exim ID that is
1843 referenced, not the Message-ID: header line.
1845 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1846 string_format() function, because snprintf() does not exist on all
1849 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1850 ${stat: expansion item.
1852 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1853 protocol synchronization error", to keep the pedants happy.
1855 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1856 well as for IRIX systems, when gcc is being used. See the host.c source
1859 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1861 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1864 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1865 transport and to the smtp transport in LMTP mode.
1867 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1869 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1870 run a filter in a subprocess. This could lead to confusion in subsequent
1871 lookups in the parent process. There should also be a search_tidyup() at
1872 the end of the subprocess.
1874 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1875 only if the host matched helo_try_verify_hosts, which caused the
1876 verification to occur when the EHLO/HELO command was issued. The ACL just
1877 tested the remembered result. Now, if a previous verification attempt has
1878 not happened, "verify = helo" does it there and then.
1880 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1882 TK/03 Fix log output including CR from clamd.
1884 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1885 exist provoked a memory error which could cause a segfault.
1887 PH/15 Installed PCRE 6.2
1889 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1891 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1892 of the problem. Specifically, suggested +O2 rather than +O1 for the
1895 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1897 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1898 record, the port was not correctly logged when the outgoing_port log
1899 selector was set (it logged the transort's default port).
1901 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1902 fallback_hosts, and "hosts" in the smtp transport.
1904 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1905 host errors such as "Connection refused".
1907 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1908 authentication with radiusclient 0.4.9:
1910 - Error returned from rc_read_config was caught wrongly
1911 - Username/password not passed on to radius server due to wrong length.
1913 The presumption is that some radiusclient API changes for 4.51/PH/17
1914 were not taken care of correctly. The code is still untested by me (my
1915 Linux distribution still has 0.3.2 of radiusclient), but it was
1916 contributed by a Radius user.
1918 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1919 expanding the "port" option of the smtp transport.
1921 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1922 while reading a MIME header. Thanks to Tom Hughes for a patch.
1924 PH/24 Include config.h inside local_scan.h so that configuration settings are
1927 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1928 that in an ACL for RCPT (for example), you can examine exactly what was
1931 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1932 commands, but it was not correctly comparing the address with the actual
1933 client host address. Thus, it would show the EHLO address in Received:
1934 header lines when this was not necessary.
1936 PH/27 Added the % operator to ${eval:}.
1938 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1939 it should be ignoring failures (because with -C, for example, it has lost
1940 privilege). It wasn't ignoring creation failures other than "already
1943 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1946 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1947 because an input line was too long, either on its own, or by virtue of
1948 too many continuations, the temporary file was not being removed, and the
1949 return code was incorrect.
1951 PH/31 Missing "BOOL" in function definition in filtertest.c.
1953 PH/32 Applied Sieve patches from the maintainer.
1955 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1957 PH/33 Added "verify = not_blind".
1959 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1960 Local/Makefile (with some defaults set). These are used in built scripts
1961 such as exicyclog, but they have never been used in the exim_install
1962 script (though there are many overriding facilities there). I have
1963 arranged that the exim_install script now takes note of these two
1966 PH/35 Installed configuration files for Dragonfly.
1968 PH/36 When a locally submitted message by a trusted user did not contain a
1969 From: header, and the sender address was obtained from -f or from an SMTP
1970 MAIL command, and the trusted user did not use -F to supply a sender
1971 name, $originator_name was incorrectly used when constructing a From:
1972 header. Furthermore, $originator_name was used for submission mode
1973 messages from external hosts without From: headers in a similar way,
1974 which is clearly wrong.
1976 PH/37 Added control=suppress_local_fixups.
1978 PH/38 When log_selector = +received_sender was set, and the addition of the
1979 sender made the log line's construction buffer exactly full, or one byte
1980 less than full, an overflow happened when the terminating "\n" was
1983 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1984 when the result of a list match is failure because a DNS lookup failed.
1986 PH/40 RM_COMMAND is now used in the building process.
1988 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1989 the "build-* directories that it finds.
1991 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1992 address in a domain literal was a prefix of an interface address.
1994 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1995 when verifying a sender address, unless rewrite_headers is false.
1997 PH/44 Wrote a long comment about why errors_to addresses are verified as
1998 recipients, not senders.
2000 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2001 the ratelimit ACL was added.
2003 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2005 PH/46 Added extra information about PostgreSQL errors to the error string.
2007 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2008 avoiding the need to install special zones in a real server. This is
2009 backwards compatible; if it can't find the fake resolver, it drops back.
2010 Thus, both old and new test suites can be run.
2012 TF/02 Added util/ratelimit.pl
2014 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2015 clock is set back in time.
2017 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2018 Candler <B.Candler@pobox.com>.
2020 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2021 OK for addresses that are the result of redirections.
2023 PH/48 A number of further additions for the benefit of the new test suite,
2024 including a fake gethostbyname() that interfaces to the fake DNS resolver
2027 TF/06 The fix for widen_domains has also been applied to qualify_single and
2028 search_parents which are the other dnslookup options that can cause
2031 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2034 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2036 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2037 service" if it encountered an MX record with an empty target hostname.
2038 The message is now "an MX or SRV record indicated no SMTP service".
2040 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2041 if the DNS of the sending site is misconfigured. This is quite a
2042 common situation. This change restores the behaviour of treating a
2043 helo verification defer as a failure.
2045 PH/51 If self=fail was set on a router, the bounce message did not include the
2046 actual error message.
2052 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2054 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2055 command itself ended in error, the underlying message about the transport
2056 filter timeout was being overwritten with the pipe command error. Now the
2057 underlying error message should be appended to the second error message.
2059 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2061 PH/02 Reduce the amount of output that "make" produces by default. Full output
2062 can still be requested.
2064 PH/03 The warning log line about a condition test deferring for a "warn" verb
2065 was being output only once per connection, rather than after each
2066 occurrence (because it was using the same function as for successful
2067 "warn" verbs). This seems wrong, so I have changed it.
2069 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2070 it should not have, which might have caused a crash in the right
2071 circumstances, but probably never did.
2073 PH/04 Installed a modified version of Tony Finch's patch to make submission
2074 mode fix the return path as well as the Sender: header line, and to
2075 add a /name= option so that you can make the user's friendly name appear
2078 TF/03 Added the control = fakedefer ACL modifier.
2080 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2081 Mark Lowes for thorough testing.
2083 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2085 TK/03 Merged latest SRS patch from Miles Wilton.
2087 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2088 with the definition in sysexits.h (which is #included earlier).
2089 Fortunately, Exim does not actually use EX_OK. The code used to try to
2090 preserve the sysexits.h value, by assumimg that macro definitions were
2091 scanned for macro replacements. I have been disabused of this notion,
2092 so now the code just undefines EX_OK before #including unistd.h.
2094 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2095 in the smtp transport. When a block could not be written in a single
2096 write() function, the timeout was being re-applied to each part-write.
2097 This seems wrong - if the receiver was accepting one byte at a time it
2098 would take for ever. The timeout is now adjusted when this happens. It
2099 doesn't have to be particularly precise.
2101 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2102 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2104 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2105 without a domain if the check to <postmaster@domain> fails.
2107 SC/01 Eximstats: added -xls and the ability to specify output files
2108 (patch written by Frank Heydlauf).
2110 SC/02 Eximstats: use FileHandles for outputing results.
2112 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2114 SC/04 Eximstats: fixed display of large numbers with -nvr option
2116 SC/05 Eximstats: fixed merging of reports with empty tables.
2118 SC/06 Eximstats: added the -include_original_destination flag
2120 SC/07 Eximstats: removed tabs and trailing whitespace.
2122 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2124 TK/06 MBOX spool code: Add real "From " MBOX separator line
2125 so the .eml file is really in mbox format (even though
2126 most programs do not really care). Patch from Alex Miller.
2128 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2129 The latter is generated from $received_to and is only set if the
2130 message has one envelope recipient. SA can use these headers,
2131 obviously out-of-the-box. Patch from Alex Miller.
2133 PH/08 The ${def test on a variable was returning false if the variable's
2134 value was "0", contrary to what the specification has always said!
2135 The result should be true unless the variable is empty.
2137 PH/09 The syntax error of a character other than { following "${if
2138 def:variable_name" (after optional whitespace) was not being diagnosed.
2139 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2140 accidental colon was present, for example, could give incorrect results.
2142 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2143 result is used (not including appendfile, where other changes are about
2146 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2147 This involved changing a lot of size variables from int to off_t. It
2148 should work with maildirs and everything.
2150 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2151 spamd dying while we are connected to it.
2153 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2156 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2157 function for BDB 4.3.
2159 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2161 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2162 the sources for PCRE have been re-arranged and more files are now
2165 PH/15 The code I had for printing potentially long long variables in PH/11
2166 above was not the best (it lost precision). The length of off_t variables
2167 is now inspected at build time, and an appropriate printing format (%ld
2168 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2169 to be "long long int" or "long int". This is needed for the internal
2170 formatting function string_vformat().
2172 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2173 the configuration file to be ":syslog", then the script "guesses" where
2174 the logs files are, rather than using the compiled in default. In our
2175 case the guess is not the same as the compiled default, so the script
2176 suddenly stopped working when I started to use syslog. The patch checks
2177 to see if log_file_path is "". If so, it attempts to read it from exim
2178 with no configuration file to get the compiled in version, before it
2179 falls back to the previous guessing code."
2181 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2182 implementing BATV in an Exim configuration. See NewStuff for the gory
2185 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2186 Makefile that are specific to HP-UX.
2188 PH/18 If the "use_postmaster" option was set for a recipient callout together
2189 with the "random" option, the postmaster address was used as the MAIL
2190 FROM address for the random test, but not for the subsequent recipient
2191 test. It is now used for both.
2193 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2194 patch removes a few documentation additions to RFC 3028, because the
2195 latest draft now contains them. It adds the new en;ascii-case comparator
2196 and a new error check for 8bit text in MIME parts. Comparator and
2197 require names are now matched exactly. I enabled the subaddress
2198 extension, but it is not well tested yet (read: it works for me)."
2200 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2201 rework some of the code of TK/09 above to avoid the hardwired use of
2202 "%lld" and "long long". Replaced the call to snprintf() with a call to
2205 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2206 records point to non-existent hosts", "retry timeout exceeded", and
2207 "retry time not reached for any host after a long failure period".
2209 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2210 experimental DomainKeys support:
2212 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2213 (2) On an error such as an illegally used "control", the wrong name for
2214 the control was given.
2216 These problems did NOT occur unless DomainKeys support was compiled.
2218 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2220 PH/24 Added ${if match_ip condition.
2222 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2223 databases so that it will be absolutely obvious if a crash occurs in the
2224 DB library. This is a regular occurrence (often caused by mis-matched
2227 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2228 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2229 picked up on a user's system that detects such things. There doesn't seem
2230 to be a gcc warning option for this - only an attribute that has to be
2231 put on the function's prototype. It seems that in Fedora Core 4 they have
2232 set this on a number of new functions. No doubt there will be more in due
2235 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2236 specify a transport. However, if an address that was verified by such a
2237 router was the subject of a callout, Exim crashed because it tried to
2238 read the rcpt_include_affixes from the non-existent transport. Now it
2239 just assumes that the setting of that option is false. This bug was
2240 introduced by 4.51/PH/31.
2242 PH/28 Changed -d+all to exclude +memory, because that information is very
2243 rarely of interest, but it makes the output a lot bigger. People tend to
2244 do -d+all out of habit.
2246 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2247 code in os-type was giving problems when libc.so lives in lib64, like on
2250 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2251 aren't the modern standard, and it seems that some systems' include files
2252 don't always have them. Exim was already checking for some of the newer
2253 ones like T_AAAA, and defining it itself. I've added checks for all the
2254 record types that Exim uses.
2256 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2257 not automatically generating a new one, as it is supposed to. This
2258 prevented TLS from working. If the file did exist, but contained invalid
2259 data, a new version was generated, as expected. It was only the case of a
2260 non-existent file that was broken.
2262 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2263 with a change in libdomainkeys > 0.64.
2265 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2266 from DNS. If the selector record carries the flag, it now has
2267 precedence over the domain-wide flag.
2269 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2271 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2272 the use of a port name that isn't defined in /etc/services) occurred, the
2273 message was deferred as in a normal delivery, and thus remained on the
2274 spool, instead of being failed because of the mua_wrapper setting. This
2275 is now fixed, and I tidied up some of the mua_wrapper messages at the
2278 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2279 the messages in a hash of arrays rather than using individual hashes.
2280 This is a bit cleaner and results in dramatic memory savings, albeit
2281 at a slight CPU cost.
2283 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2284 as requested by Marc Sherman.
2286 SC/10 Eximstats: added histograms for user specified patterns as requested
2289 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2291 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2292 fopen() in the content-scanning modules that did not already have it.
2298 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2299 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2301 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2303 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2305 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2306 to test Sieve filters that use "vacation".
2308 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2309 that changes the way the GnuTLS parameters are stored in the cache file.
2310 The new format can be generated externally. For backward compatibility,
2311 if the data in the cache doesn't make sense, Exim assumes it has read an
2312 old-format file, and it generates new data and writes a new file. This
2313 means that you can't go back to an older release without removing the
2316 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2317 work if there are any delivery delays because "one_time" forces the
2318 parent to be marked "delivered", so its unseen clone is never tried
2319 again. For this reason, Exim now forbids the simultaneous setting of
2322 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2323 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2324 entry if you want to know the details. The fix, however, neglected to
2325 consider the case when local delivery batching is involved. The test for
2326 "previously delivered" was not happening when checking to see if an
2327 address could be batched with a previous (undelivered) one; under
2328 certain circumstances this could lead to multiple deliveries to the same
2331 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2332 in its include files, and this causes problems building Exim.
2334 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2335 header_syntax) but Exim was just ignoring anything given after a slash.
2336 In particular, this caused confusion with an attempt to use "verify =
2337 reverse_host_lookup/defer_ok". An error is now given when options are
2338 supplied for verify items that do not have them. (Maybe reverse_host_
2339 lookup should have a defer_ok option, but that's a different point.)
2341 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2342 defined by RFC 821) to 2048, because there were problems with some AUTH
2343 commands, and RFC 1869 says the size should be increased for extended
2344 SMTP commands that take arguments.
2346 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2349 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2350 "unknown" error; now it says that the functionality isn't in the binary.
2352 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2353 an address' error message when a string expansion fails (syntax or
2354 whatever). Otherwise the password may appear in the log. Following change
2355 PH/42 below, there is no longer a chance of it appearing in a bounce
2358 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2360 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2361 of its addresses was ever tried. (Bugzilla bug #2.)
2363 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2364 the result incorrectly in the debug output. (It correctly added a newline
2365 to what was transported.)
2367 TF/01 Added $received_time.
2369 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2370 commented out examples of how to interface to a virus scanner and to
2371 SpamAssassin. Also added commented examples of av_scanner and
2372 spamd_address settings.
2374 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2375 and controls are allowed in which ACLs. There were a couple of minor
2376 errors. Some of the entries in the conditions table (which is a table of
2377 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2378 negation of where the condition IS allowed.
2380 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2382 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2383 header file does not have a version number, so I've had to invent a new
2384 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2385 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2386 radiusclient), but it was contributed by a Radius user.
2388 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2389 files or directories, for OpenSSL.
2391 PH/19 When an Exim process that is running as root has to create an Exim log
2392 file, it does so in a subprocess that runs as exim:exim so as to get the
2393 ownership right at creation (otherwise, other Exim processes might see
2394 the file with the wrong ownership). There was no test for failure of this
2395 fork() call, which would lead to the process getting stuck as it waited
2396 for a non-existent subprocess. Forks do occasionally fail when resources
2397 run out. I reviewed all the other calls to fork(); they all seem to check
2400 PH/20 When checking for unexpected SMTP input at connect time (before writing
2401 the banner), Exim was not dealing correctly with a non-positive return
2402 from the read() function. If the client had disconnected by this time,
2403 the result was a log entry for a synchronization error with an empty
2404 string after "input=" when read() returned zero. If read() returned -1
2405 (an event I could not check), uninitialized data bytes were printed.
2406 There were reports of junk text (parts of files, etc) appearing after
2409 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2411 PH/22 Added support for macro redefinition, and (re)definition in between
2412 driver and ACL definitions.
2414 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2415 forgetting to use the resulting value; it was using the unexpanded value.
2417 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2418 hadn't been configured. The fix is from Juergen Kreileder, who
2419 understands it better than I do:
2421 "Here's what I see happening with three configured cyrus_sasl
2422 authenticators configured (plain, login, cram-md5):
2424 On startup auth_cyrus_sasl_init() gets called for each of these.
2425 This means three calls to sasl_listmech() without a specified mech_list.
2426 => SASL tests which mechs of all available mechs actually work
2427 => three warnings about OTP not working
2428 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2430 With the patch, sasl_listmech() also gets called three times. But now
2431 SASL's mech_list option is set to the server_mech specified in the the
2432 authenticator. Or in other words, the answer from sasl_listmech()
2433 gets limited to just the mech you're testing for (which is different
2435 => the return list contains just 'plain' or 'login', 'cram-md5' or
2436 nothing depending on the value of ob->server_mech.
2438 I've just tested the patch: Authentication still works fine,
2439 unavailable mechs specified in the exim configuration are still
2440 caught, and the auth.log warnings about OTP are gone."
2442 PH/25 When debugging is enabled, the contents of the command line are added
2443 to the debugging output, even when log_selector=+arguments is not
2446 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2447 answer is "GNU", and only if the return is "GNU/something" is the answer
2450 PH/27 $acl_verify_message is now set immediately after the failure of a
2451 verification in an ACL, and so is available in subsequent modifiers. In
2452 particular, the message can be preserved by coding like this:
2454 warn !verify = sender
2455 set acl_m0 = $acl_verify_message
2457 Previously, $acl_verify_message was set only while expanding "message"
2458 and "log_message" when a very denied access.
2460 PH/28 Modified OS/os.c-Linux with
2462 -#ifndef OS_LOAD_AVERAGE
2463 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2465 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2466 nomenclature these days.)
2468 PH/29 Installed patch from the Sieve maintainer that adds the options
2469 sieve_useraddress and sieve_subaddress to the redirect router.
2471 PH/30 In these circumstances:
2472 . Two addresses routed to the same list of hosts;
2473 . First host does not offer TLS;
2474 . First host accepts first address;
2475 . First host gives temporary error to second address;
2476 . Second host offers TLS and a TLS session is established;
2477 . Second host accepts second address.
2478 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2479 and peerdn, if requested) that were in fact used only for the second
2482 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2483 attention to any local part prefix or suffix that was matched by the
2484 router that accepted the address. It now behaves in the same way as it
2485 does for delivery: the affixes are removed from the local part unless
2486 rcpt_include_affixes is set on the transport.
2488 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2489 timeout during the DATA phase of an incoming message.
2491 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2492 applied a patch sanctioned by the Sieve maintainer.
2494 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2495 the uid or gid is negative. A case of a negative gid caused this to be
2496 noticed. The fix allows for either to be negative.
2498 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2499 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2502 PH/36 The change PH/12 above was broken. Fixed it.
2504 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2505 the grounds that routing the same address twice would always produce the
2506 same answer. This might have been true once, but it is certainly no
2507 longer true now. Routing a child address may depend on the previous
2508 routing that produced that child. Some complicated redirection strategies
2509 went wrong when messages had multiple recipients, and made Exim's
2510 behaviour dependent on the order in which the addresses were given.
2512 I have moved the duplicate checking until after the routing is complete.
2513 Exim scans the addresses that are assigned to local and remote
2514 transports, and removes any duplicates. This means that more work will be
2515 done, as duplicates will always all be routed, but duplicates are
2516 presumably rare, so I don't expect this is of any significance.
2518 For deliveries to pipes, files, and autoreplies, the duplicate checking
2519 still happens during the routing process, since they are not going to be
2522 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2523 It corrects a timeout issue with spamd. This is Ian's comment: "The
2524 background is that sometimes spamd either never reads data from a
2525 connection it has accepted, or it never writes response data. The exiscan
2526 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2527 blindly assumes that writes won't block so it may never time out."
2529 PH/39 Allow G after quota size as well as K and M.
2531 PH/40 The value set for $authenticated_id in an authenticator may not contain
2532 binary zeroes or newlines because the value is written to log lines and
2533 to spool files. There was no check on this. Now the value is run through
2534 the string_printing() function so that such characters are converted to
2535 printable escape sequences.
2537 PH/41 $message_linecount is a new variable that contains the total number of
2538 lines in the message. Compare $body_linecount, which is the count for the
2541 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2542 bounce and delay warning messages, except in certain special cases, which
2545 (a) An SMTP error message from a remote host;
2546 (b) A message specified in a :fail: redirection;
2547 (c) A message specified in a "fail" command in a system filter;
2548 (d) A message specified in a FAIL return from the queryprogram router;
2549 (e) A message specified by the cannot_route_message router option.
2551 In these cases only, Exim does include the error details in bounce and
2552 warning messages. There are also a few cases where bland messages such
2553 as "unrouteable address" or "local delivery error" are given.
2555 PH/43 $value is now also set for the "else" part of a ${run expansion.
2557 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2558 being worked on, but at least Exim now implements the latest version to
2561 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2562 process to complete was treated as a delivery failure, a timeout while
2563 writing the message to the pipe was logged, but erroneously treated as a
2564 successful delivery. Such timeouts include transport filter timeouts. For
2565 consistency with the overall process timeout, these timeouts are now
2566 treated as errors, giving rise to delivery failures by default. However,
2567 there is now a new Boolean option for the pipe transport called
2568 timeout_defer, which, if set TRUE, converts the failures into defers for
2569 both kinds of timeout. A transport filter timeout is now identified in
2572 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2573 systems where "make" and "gmake" are different, calling "gmake" at top
2574 level broke things. I've arranged for the value of $(MAKE) to be passed
2575 from the Makefile to this script so that it can call the same version of
2579 A note about Exim versions 4.44 and 4.50
2580 ----------------------------------------
2582 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2583 changes of various kinds. As a consequence, a big documentation update was
2584 needed. This delayed the release for rather longer than seemed good, especially
2585 in the light of a couple of (minor) security issues. Therefore, the changes
2586 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2587 release. So 4.44 and 4.50 are in effect two different branches that both start
2590 I have left the 4.50 change log unchanged; it contains all the changes since
2591 4.43. The change log for 4.44 is below; many of its items are identical to
2592 those for 4.50. This seems to be the most sensible way to preserve the
2593 historical information.
2599 1. Minor wording change to the doc/README.SIEVE file.
2601 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2602 computation of the current number of files was incorrect.
2604 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2605 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2608 4. Give more explanation in the error message when the command for a transport
2609 filter fails to execute.
2611 5. There are several places where Exim runs a non-Exim command in a
2612 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2613 was being done only for the command run by the queryprogram router. It is
2614 now done for all such subprocesses. The other cases are: ${run, transport
2615 filters, and the commands run by the lmtp and pipe transports.
2617 6. Added CONFIGURE_GROUP build-time option.
2619 7. Some older OS have a limit of 256 on the maximum number of file
2620 descriptors. Exim was using setrlimit() to set 1000 as a large value
2621 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2622 systems. I've change it so that if it can't get 1000, it tries for 256.
2624 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2625 was an oversight, and furthermore, ever since the addition of extra
2626 controls (e.g. 4.43/32), the checks on when to allow different forms of
2627 "control" were broken. There should now be diagnostics for all cases when a
2628 control that does not make sense is encountered.
2630 9. Added the /retain_sender option to "control=submission".
2632 10. $recipients is now available in the predata ACL (oversight).
2634 11. Tidy the search cache before the fork to do a delivery from a message
2635 received from the command line. Otherwise the child will trigger a lookup
2636 failure and thereby defer the delivery if it tries to use (for example) a
2637 cached ldap connection that the parent has called unbind on.
2639 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2640 of $address_data from the recipient verification was clobbered by the
2641 sender verification.
2643 13. The value of address_data from a sender verification is now available in
2644 $sender_address_data in subsequent conditions in the ACL statement.
2646 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2648 15. Added a new option "connect=<time>" to callout options, to set a different
2651 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2652 was its contents. (It was OK if the option was not defined at all.)
2654 17. A "Completed" log line is now written for messages that are removed from
2655 the spool by the -Mrm option.
2657 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2658 information about exactly what failed.
2660 19. Added -dd to debug only the daemon process.
2662 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2663 handles timeouts, both on the server side and network timeouts. Renamed the
2664 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2666 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2667 It is now set to "smtps".
2669 22. $host_address is now set to the target address during the checking of
2670 ignore_target_hosts.
2672 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2673 being passed; this would have caused $sender_host_name to have been used if
2674 matching the list had actually called for a host name (not very likely,
2675 since this list is usually IP addresses). A host name is now passed as
2678 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2679 code that specifies a non-restarting handler (typically sigaction() in
2680 modern systems) in an attempt to fix a rare and obscure crash bug.
2682 25. Narrowed the window for a race in the daemon that could cause it to ignore
2683 SIGCHLD signals. This is not a major problem, because they are used only to
2684 wake it up if nothing else does.
2686 26. A malformed maildirsize file could cause Exim to calculate negative values
2687 for the mailbox size or file count. Odd effects could occur as a result.
2688 The maildirsize information is now recalculated if the size or filecount
2691 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2692 support for a long time. Removed HAVE_SYS_VFS_H.
2694 28. Installed the latest version of exipick from John Jetmore.
2696 29. In an address list, if the pattern was not a regular expression, an empty
2697 subject address (from a bounce message) matched only if the pattern was an
2698 empty string. Non-empty patterns were not even tested. This was the wrong
2699 because it is perfectly reasonable to use an empty address as part of a
2700 database query. An empty address is now tested by patterns that are
2701 lookups. However, all the other forms of pattern expect the subject to
2702 contain a local part and a domain, and therefore, for them, an empty
2703 address still always fails if the pattern is not itself empty.
2705 30. Exim went into a mad DNS loop when attempting to do a callout where the
2706 host was specified on an smtp transport, and looking it up yielded more
2707 than one IP address.
2709 31. Re-factored the code for checking spool and log partition space into a
2710 function that finds that data and another that does the check. The former
2711 is then used to implement four new variables: $spool_space, $log_space,
2712 $spool_inodes, and $log_inodes.
2714 32. The RFC2047 encoding function was originally intended for short strings
2715 such as real names; it was not keeping to the 75-character limit for
2716 encoded words that the RFC imposes. It now respects the limit, and
2717 generates multiple encoded words if necessary. To be on the safe side, I
2718 have increased the buffer size for the ${rfc2047: expansion operator from
2721 33. It is now permitted to omit both strings after an "if" condition; if the
2722 condition is true, the result is "true". As before, when the second string
2723 is omitted, a false condition yields an empty string. This makes it less
2724 cumbersome to write custom ACL and router conditions.
2726 34. Failure to deliver a bounce message always caused it to be frozen, even if
2727 there was an errors_to setting on the router. The errors_to setting is now
2730 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2731 canonical form (fully expanded) before being placed in
2732 $sender_host_address.
2734 36. The table in the code that translates DNS record types into text (T_A to
2735 "A" for instance) was missing entries for NS and CNAME. It is just possible
2736 that this could have caused confusion if both these types were looked up
2737 for the same domain, because the text type is used as part of Exim's
2738 per-process caching. But the chance of anyone hitting this buglet seems
2741 37. The dnsdb lookup has been extended in a number of ways.
2743 (1) There is a new type, "zns", which walks up the domain tree until it
2744 finds some nameserver records. It should be used with care.
2746 (2) There is a new type, "mxh", which is like "mx" except that it returns
2747 just the host names, not the priorities.
2749 (3) It is now possible to give a list of domains (or IP addresses) to be
2750 looked up. The behaviour when one of the lookups defers can be
2751 controlled by a keyword.
2753 (4) It is now possible to specify the separator character for use when
2754 multiple records are returned.
2756 38. The dnslists ACL condition has been extended: it is now possible to supply
2757 a list of IP addresses and/or domains to be looked up in a particular DNS
2760 39. Added log_selector=+queue_time_overall.
2762 40. When running the queue in the test harness, wait just a tad after forking a
2763 delivery process, to get repeatability of debugging output.
2765 41. Include certificate and key file names in error message when GnuTLS fails
2766 to set them up, because the GnuTLS error message doesn't include the name
2767 of the failing file when there is a problem reading it.
2769 42. Allow both -bf and -bF in the same test run.
2771 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2773 44. The "Exiscan patch" is now merged into the mainline Exim source.
2775 45. Sometimes the final signoff response after QUIT could fail to get
2776 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2777 < 0 before doing a fflush(). This bug looks as though it goes back to the
2778 introduction of TLS in release 3.20, but "sometimes" must have been rare
2779 because the tests only now provoked it.
2781 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2782 (this can affect the format of dates).
2784 47. exim_tidydb, when checking for the continued existence of a message for
2785 which it has found a message-specific retry record, was not finding
2786 messages that were in split spool directories. Consequently, it was
2787 deleting retry records that should have stayed in existence.
2789 48. Steve fixed some bugs in eximstats.
2791 49. The SPA authentication driver was not abandoning authentication and moving
2792 on to the next authenticator when an expansion was forced to fail,
2793 contradicting the general specification for all authenticators. Instead it
2794 was generating a temporary error. It now behaves as specified.
2796 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2797 (the order specifies the preference for clients). The order is now AES256,
2798 AES128, 3DES, ARCFOUR128.
2800 51. Small patch to Sieve code - explicitly set From: when generating an
2803 52. Exim crashed if a remote delivery caused a very long error message to be
2804 recorded - for instance if somebody sent an entire SpamAssassin report back
2805 as a large number of 550 error lines. This bug was coincidentally fixed by
2806 increasing the size of one of Exim's internal buffers (big_buffer) that
2807 happened as part of the Exiscan merge. However, to be on the safe side, I
2808 have made the code more robust (and fixed the comments that describe what
2811 53. Now that there can be additional text after "Completed" in log lines (if
2812 the queue_time_overall log selector is set), a one-byte patch to exigrep
2813 was needed to allow it to recognize "Completed" as not the last thing in
2816 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2817 patch that reportedly fixes this has been added. I am not expert enough to
2818 create a test for it. This is what the patch creator wrote:
2820 "I found a little strange behaviour of ldap code when working with
2821 Windows 2003 AD Domain, where users was placed in more than one
2822 Organization Units. When I tried to give exim partial DN, the exit code
2823 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2824 But simultaneously result of request was absolutely normal ldap result,
2825 so I produce this patch..."
2827 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2828 REFERENCE, so I have modified the code to exclude the patch when that macro
2831 55. Some experimental protocols are using DNS PTR records for new purposes. The
2832 keys for these records are domain names, not reversed IP addresses. The
2833 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2834 leaves it alone. Component reversal etc. now happens only for IP addresses.
2837 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2839 57. Double the size of the debug message buffer (to 2048) so that more of very
2840 long debug lines gets shown.
2842 58. The exicyclog utility now does better if the number of log files to keep
2843 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2845 59. Two changes related to the smtp_active_hostname option:
2847 (1) $smtp_active_hostname is now available as a variable.
2848 (2) The default for smtp_banner uses $smtp_active_hostname instead
2849 of $primary_hostname.
2851 60. The host_aton() function is supposed to be passed a string that is known
2852 to be a valid IP address. However, in the case of IPv6 addresses, it was
2853 not checking this. This is a hostage to fortune. Exim now panics and dies
2854 if the condition is not met. A case was found where this could be provoked
2855 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2856 components; fortuitously, this particular loophole had already been fixed
2857 by change 4.50/55 above.
2859 If there are any other similar loopholes, the new check in host_aton()
2860 itself should stop them being exploited. The report I received stated that
2861 data on the command line could provoke the exploit when Exim was running as
2862 exim, but did not say which command line option was involved. All I could
2863 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2864 running as the user.
2867 61. There was a buffer overflow vulnerability in the SPA authentication code
2868 (which came originally from the Samba project). I have added a test to the
2869 spa_base64_to_bits() function which I hope fixes it.
2872 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2873 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2875 63. The daemon start-up calls getloadavg() while still root for those OS that
2876 need the first call to be done as root, but it missed one case: when
2877 deliver_queue_load_max is set with deliver_drop_privilege. This is
2878 necessary for the benefit of the queue runner, because there is no re-exec
2879 when deliver_drop_privilege is set.
2881 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2882 This has been fixed.
2884 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2885 was in use, was not putting the data itself into the right store pool;
2886 consequently, it could be overwritten for a subsequent message in the same
2887 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2890 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2892 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2893 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2894 the function were treating the return as a boolean value, which happened to
2895 work because 0=false and not-0=true, but is not correct code.
2897 68. The host_aton() function was not handling scoped IPv6 addresses (those
2898 with, for example, "%eth0" on the end) correctly.
2900 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2901 negated items (that is, ~something) in unsigned ints. Some compilers
2902 apparently mutter when there is no cast.
2904 70. If an address verification called from an ACL failed, and did not produce a
2905 user-specific message (i.e. there was only a "system" message), nothing was
2906 put in $acl_verify_message. In this situation, it now puts the system
2909 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2910 session; change 4.31/43 added the unwanted input to the log line - except
2911 that it did not do this in the start of session case. It now does.
2913 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2914 This is wrong and can cause the other end to generate a synchronization
2915 error if it is another Exim or anything else that does the synchronization
2916 check. A QUIT command is no longer sent after a timeout.
2918 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2919 during host lookups.
2921 74. The defer_ok option of callout verification was not working if it was used
2922 when verifying addresses in header lines, that is, for this case:
2924 verify = header_sender/callout=defer_ok
2926 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2927 those file descriptors could be used for SMTP connections. If anything
2928 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2929 could be sent to the SMTP client, causing chaos. The daemon now opens
2930 stdin, stdout, and stderr to /dev/null when it puts itself into the
2933 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2934 log by default. The user can override this with suitable Perl magic.
2936 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2937 the log message when discard triggers, was not working for the DATA ACL or
2938 for the non-SMTP ACL.
2940 78. Error message wording change in sieve.c.
2942 79. If smtp_accept_max_per_host was set, the number of connections could be
2943 restricted to fewer than expected, because the daemon was trying to set up
2944 a new connection before checking whether the processes handling previous
2945 connections had finished. The check for completed processes is now done
2946 earlier. On busy systems, this bug wouldn't be noticed because something
2947 else would have woken the daemon, and it would have reaped the completed
2950 80. If a message was submitted locally by a user whose login name contained one
2951 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2952 It caused a spool format error. I have fixed the spool reading code. A
2953 related problem was that the "from" clause in the Received: line became
2954 illegal because of the space(s). It is now covered by ${quote_local_part.
2956 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2959 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2961 83. Patch from Sieve maintainer to fix unterminated string problem in
2962 "vacation" handling.
2964 84. Some minor changes to the Linux configuration files to help with other
2965 OS variants using glibc.
2967 85. One more patch for Sieve to update vacation handling to latest spec.
2970 ----------------------------------------------------
2971 See the note above about the 4.44 and 4.50 releases.
2972 ----------------------------------------------------
2978 1. Change 4.43/35 introduced a bug that caused file counts to be
2979 incorrectly computed when quota_filecount was set in an appendfile
2982 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2983 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2986 3. Give more explanation in the error message when the command for a transport
2987 filter fails to execute.
2989 4. There are several places where Exim runs a non-Exim command in a
2990 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2991 was being done only for the command run by the queryprogram router. It is
2992 now done for all such subprocesses. The other cases are: ${run, transport
2993 filters, and the commands run by the lmtp and pipe transports.
2995 5. Some older OS have a limit of 256 on the maximum number of file
2996 descriptors. Exim was using setrlimit() to set 1000 as a large value
2997 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2998 systems. I've change it so that if it can't get 1000, it tries for 256.
3000 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3001 was an oversight, and furthermore, ever since the addition of extra
3002 controls (e.g. 4.43/32), the checks on when to allow different forms of
3003 "control" were broken. There should now be diagnostics for all cases when a
3004 control that does not make sense is encountered.
3006 7. $recipients is now available in the predata ACL (oversight).
3008 8. Tidy the search cache before the fork to do a delivery from a message
3009 received from the command line. Otherwise the child will trigger a lookup
3010 failure and thereby defer the delivery if it tries to use (for example) a
3011 cached ldap connection that the parent has called unbind on.
3013 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3014 of $address_data from the recipient verification was clobbered by the
3015 sender verification.
3017 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3018 was its contents. (It was OK if the option was not defined at all.)
3020 11. A "Completed" log line is now written for messages that are removed from
3021 the spool by the -Mrm option.
3023 12. $host_address is now set to the target address during the checking of
3024 ignore_target_hosts.
3026 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3027 being passed; this would have caused $sender_host_name to have been used if
3028 matching the list had actually called for a host name (not very likely,
3029 since this list is usually IP addresses). A host name is now passed as
3032 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3033 code that specifies a non-restarting handler (typically sigaction() in
3034 modern systems) in an attempt to fix a rare and obscure crash bug.
3036 15. Narrowed the window for a race in the daemon that could cause it to ignore
3037 SIGCHLD signals. This is not a major problem, because they are used only to
3038 wake it up if nothing else does.
3040 16. A malformed maildirsize file could cause Exim to calculate negative values
3041 for the mailbox size or file count. Odd effects could occur as a result.
3042 The maildirsize information is now recalculated if the size or filecount
3045 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3046 support for a long time. Removed HAVE_SYS_VFS_H.
3048 18. Updated exipick to current release from John Jetmore.
3050 19. Allow an empty sender to be matched against a lookup in an address list.
3051 Previously the only cases considered were a regular expression, or an
3054 20. Exim went into a mad DNS lookup loop when doing a callout where the
3055 host was specified on the transport, if the DNS lookup yielded more than
3058 21. The RFC2047 encoding function was originally intended for short strings
3059 such as real names; it was not keeping to the 75-character limit for
3060 encoded words that the RFC imposes. It now respects the limit, and
3061 generates multiple encoded words if necessary. To be on the safe side, I
3062 have increased the buffer size for the ${rfc2047: expansion operator from
3065 22. Failure to deliver a bounce message always caused it to be frozen, even if
3066 there was an errors_to setting on the router. The errors_to setting is now
3069 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3070 canonical form (fully expanded) before being placed in
3071 $sender_host_address.
3073 24. Updated eximstats to version 1.33
3075 25. Include certificate and key file names in error message when GnuTLS fails
3076 to set them up, because the GnuTLS error message doesn't include the name
3077 of the failing file when there is a problem reading it.
3079 26. Expand error message when OpenSSL has problems setting up cert/key files.
3082 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3083 (this can affect the format of dates).
3085 28. exim_tidydb, when checking for the continued existence of a message for
3086 which it has found a message-specific retry record, was not finding
3087 messages that were in split spool directories. Consequently, it was
3088 deleting retry records that should have stayed in existence.
3090 29. eximstats updated to version 1.35
3091 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3092 1.35 - bugfix such that pie charts by volume are generated correctly
3094 30. The SPA authentication driver was not abandoning authentication and moving
3095 on to the next authenticator when an expansion was forced to fail,
3096 contradicting the general specification for all authenticators. Instead it
3097 was generating a temporary error. It now behaves as specified.
3099 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3100 (the order specifies the preference for clients). The order is now AES256,
3101 AES128, 3DES, ARCFOUR128.
3103 31. Small patch to Sieve code - explicitly set From: when generating an
3106 32. Exim crashed if a remote delivery caused a very long error message to be
3107 recorded - for instance if somebody sent an entire SpamAssassin report back
3108 as a large number of 550 error lines. This bug was coincidentally fixed by
3109 increasing the size of one of Exim's internal buffers (big_buffer) that
3110 happened as part of the Exiscan merge. However, to be on the safe side, I
3111 have made the code more robust (and fixed the comments that describe what
3114 33. Some experimental protocols are using DNS PTR records for new purposes. The
3115 keys for these records are domain names, not reversed IP addresses. The
3116 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3117 leaves it alone. Component reversal etc. now happens only for IP addresses.
3120 34. The host_aton() function is supposed to be passed a string that is known
3121 to be a valid IP address. However, in the case of IPv6 addresses, it was
3122 not checking this. This is a hostage to fortune. Exim now panics and dies
3123 if the condition is not met. A case was found where this could be provoked
3124 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3125 components; fortuitously, this particular loophole had already been fixed
3126 by change 4.50/55 or 4.44/33 above.
3128 If there are any other similar loopholes, the new check in host_aton()
3129 itself should stop them being exploited. The report I received stated that
3130 data on the command line could provoke the exploit when Exim was running as
3131 exim, but did not say which command line option was involved. All I could
3132 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3133 running as the user.
3136 35. There was a buffer overflow vulnerability in the SPA authentication code
3137 (which came originally from the Samba project). I have added a test to the
3138 spa_base64_to_bits() function which I hope fixes it.
3141 36. The daemon start-up calls getloadavg() while still root for those OS that
3142 need the first call to be done as root, but it missed one case: when
3143 deliver_queue_load_max is set with deliver_drop_privilege. This is
3144 necessary for the benefit of the queue runner, because there is no re-exec
3145 when deliver_drop_privilege is set.
3147 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3148 was in use, was not putting the data itself into the right store pool;
3149 consequently, it could be overwritten for a subsequent message in the same
3150 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3153 38. Sometimes the final signoff response after QUIT could fail to get
3154 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3155 < 0 before doing a fflush(). This bug looks as though it goes back to the
3156 introduction of TLS in release 3.20, but "sometimes" must have been rare
3157 because the tests only now provoked it.
3163 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3164 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3165 Now it returns an integer. A number of calls were still expecting a T/F
3166 return. Fortuitously, in all cases, the tests worked in OK situations,
3167 which is the norm. However, things would have gone wrong on any write
3168 failures on the smtp file descriptor. This function is used when sending
3169 messages over SMTP and also when doing verify callouts.
3171 2. When Exim is called to do synchronous delivery of a locally submitted
3172 message (the -odf or -odi options), it no longer closes stderr before doing
3175 3. Implemented the mua_wrapper option.
3177 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3179 5. Implemented the functions header_remove(), header_testname(),
3180 header_add_at_position(), and receive_remove_recipient(), and exported them
3183 6. If an ACL "warn" statement specified the addition of headers, Exim already
3184 inserted X-ACL-Warn: at the start if there was no header name. However, it
3185 was not making this test for the second and subsequent header lines if
3186 there were newlines in the string. This meant that an invalid header could
3187 be inserted if Exim was badly configured.
3189 7. Allow an ACL "warn" statement to add header lines at the start or after all
3190 the Received: headers, as well as at the end.
3192 8. Added the rcpt_4xx retry error code.
3194 9. Added postmaster_mailfrom=xxx to callout verification option.
3196 10. Added mailfrom=xxxx to the callout verification option, for verify=
3199 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3200 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3202 12. Inserted some casts to stop certain compilers warning when using pointer
3203 differences as field lengths or precisions in printf-type calls (mostly
3204 affecting debugging statements).
3206 13. Added optional readline() support for -be (dynamically loaded).
3208 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3209 same clock tick as a message's arrival, so that its received time was the
3210 same as the "first fail" time on the retry record, and that message
3211 remained on the queue past the ultimate address timeout, every queue runner
3212 would try a delivery (because it was past the ultimate address timeout) but
3213 after another failure, the ultimate address timeout, which should have then
3214 bounced the address, did not kick in. This was a "< instead of <=" error;
3215 in most cases the first failure would have been in the next clock tick
3216 after the received time, and all would be well.
3218 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3219 being recognized when the domain list was tested by the match_domain
3220 condition in an expansion string.
3222 16. Added the ${str2b64: operator.
3224 17. Exim was always calling setrlimit() to set a large limit for the number of
3225 processes, without checking whether the existing limit was already
3226 adequate. (It did check for the limit on file descriptors.) Furthermore,
3227 errors from getrlimit() and setrlimit() were being ignored. Now they are
3228 logged to the main and panic logs, but Exim does carry on, to try to do its
3229 job under whatever limits there are.
3231 18. Imported PCRE 5.0.
3233 19. Trivial typo in log message " temporarily refused connection" (the leading
3236 20. If the log selector return_path_on_delivery was set and an address was
3237 redirected to /dev/null, the delivery process crashed because it assumed
3238 that a return path would always be set for a "successful" delivery. In this
3239 case, the whole delivery is bypassed as an optimization, and therefore no
3242 21. Internal re-arrangement: the function for sending a challenge and reading
3243 a response while authentication was assuming a zero-terminated challenge
3244 string. It's now changed to take a pointer and a length, to allow for
3245 binary data in such strings.
3247 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3249 23. Exim was not respecting finduser_retries when seeking the login of the
3250 uid under which it was called; it was always trying 10 times. (The default
3251 setting of finduser_retries is zero.) Also, it was sleeping after the final
3252 failure, which is pointless.
3254 24. Implemented tls_on_connect_ports.
3256 25. Implemented acl_smtp_predata.
3258 26. If the domain in control=submission is set empty, Exim assumes that the
3259 authenticated id is a complete email address when it generates From: or
3260 Sender: header lines.
3262 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3263 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3264 chown and chgrp in /bin and hostname in /usr/bin.
3266 28. Exim was keeping the "process log" file open after each use, just as it
3267 does for the main log. This opens the possibility of it remaining open for
3268 long periods when the USR1 signal hits a daemon. Occasional processlog
3269 errors were reported, that could have been caused by this. Anyway, it seems
3270 much more sensible not to leave this file open at all, so that is what now
3273 29. The long-running daemon process does not normally write to the log once it
3274 has entered its main loop, and it closes the log before doing so. This is
3275 so that log files can straightforwardly be renamed and moved. However,
3276 there are a couple of unusual error situations where the daemon does write
3277 log entries, and I had neglected to close the log afterwards.
3279 30. The text of an SMTP error response that was received during a remote
3280 delivery was being truncated at 512 bytes. This is too short for some of
3281 the long messages that one sometimes sees. I've increased the limit to
3284 31. It is now possible to make retry rules that apply only when a message has a
3285 specific sender, in particular, an empty sender.
3287 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3288 it possible to be selective about when SMTP synchronization is enforced.
3290 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3292 32. Implemented hosts_connection_nolog.
3294 33. Added an ACL for QUIT.
3296 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3299 35. Added mailbox_size and mailbox_filecount to appendfile.
3301 36. Added control = no_multiline_responses to ACLs.
3303 37. There was a bug in the logic of the code that waits for the clock to tick
3304 in the case where the clock went backwards by a substantial amount such
3305 that the microsecond fraction of "now" was more than the microsecond
3306 fraction of "then" (but the whole seconds number was less).
3308 38. Added support for the libradius Radius client library this is found on
3309 FreeBSD (previously only the radiusclient library was supported).
3315 1. When certain lookups returned multiple values in the form name=value, the
3316 quoting of the values was not always being done properly. Specifically:
3317 (a) If the value started with a double quote, but contained no whitespace,
3319 (b) If the value contained whitespace other than a space character (i.e.
3320 tabs or newlines or carriage returns) it was not quoted.
3321 This fix has been applied to the mysql and pgsql lookups by writing a
3322 separate quoting function and calling it from the lookup code. The fix
3323 should probably also be applied to nisplus, ibase and oracle lookups, but
3324 since I cannot test any of those, I have not disturbed their existing code.
3326 2. A hit in the callout cache for a specific address caused a log line with no
3327 reason for rejecting RCPT. Now it says "Previous (cached) callout
3328 verification failure".
3330 3. There was an off-by-one bug in the queryprogram router. An over-long
3331 return line was truncated at 256 instead of 255 characters, thereby
3332 overflowing its buffer with the terminating zero. As well as fixing this, I
3333 have increased the buffer size to 1024 (and made a note to document this).
3335 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3336 when Exim is waiting for an SMTP response from a remote server, Exim
3337 restarts its select() call on the socket, thereby resetting its timeout.
3338 This is not a problem when such interrupts are rare. Somebody set up a cron
3339 job to run exiwhat every 2 minutes, which is less than the normal select()
3340 timeout (5 or 10 minutes). This meant that the select() timeout never
3341 kicked in because it was always reset. I have fixed this by comparing the
3342 time when an interrupt arrives with the time at the start of the first call
3343 to select(). If more time than the timeout has elapsed, the interrupt is
3344 treated as a timeout.
3346 5. Some internal re-factoring in preparation for the addition of Sieve
3347 extensions (by MH). In particular, the "personal" test is moved to a
3348 separate function, and given an option for scanning Cc: and Bcc: (which is
3349 not set for Exim filters).
3351 6. When Exim created an email address using the login of the caller as the
3352 local part (e.g. when creating a From: or Sender: header line), it was not
3353 quoting the local part when it contained special characters such as @.
3355 7. Installed new OpenBSD configuration files.
3357 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3358 try to make them clearer.
3360 9. Callout options, other than the timeout value, were being ignored when
3361 verifying sender addresses in header lines. For example, when using
3363 verify = header_sender/callout=no_cache
3365 the cache was (incorrectly) being used.
3367 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3368 only the Cygwin environment.
3370 11. When return_path_on_delivery was set as a log selector, if different remote
3371 addresses in the same message used different return paths and parallel
3372 remote delivery occurred, the wrong values would sometimes be logged.
3373 (Whenever a remote delivery process finished, the return path value from
3374 the most recently started remote delivery process was logged.)
3376 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3377 lines when AUTH and/or TLS are in use. This is the "received protocol"
3378 field. Exim used to use "asmtp" for authenticated SMTP, without any
3379 indication (in the protocol name) for TLS use. Now it follows the RFC and
3380 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3381 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3382 names appear in log lines as well as in Received: header lines.
3384 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3385 extensions, and comparison tests, and to fix some bugs.
3387 14. Changes to the "personal" filter test:
3389 (1) The test was buggy in that it was just doing the equivalent of
3390 "contains" tests on header lines. For example, if a user's address was
3391 anne@some.where, the "personal" test would incorrectly be true for
3393 To: susanne@some.where
3395 This test is now done by extracting each address from the header in turn,
3396 and checking the entire address. Other tests that are part of "personal"
3397 are now done using regular expressions (for example, to check local parts
3398 of addresses in From: header lines).
3400 (2) The list of non-personal local parts in From: addresses has been
3401 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3402 taken from the Sieve specification recommendations.
3404 (3) If the message contains any header line starting with "List-" it is
3405 treated as non-personal.
3407 (4) The test for "circular" in the Subject: header line has been removed
3408 because it now seems ill-conceived.
3410 15. Minor typos in src/EDITME comments corrected.
3412 16. Installed latest exipick from John Jetmore.
3414 17. If headers_add on a router specified a text string that was too long for
3415 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3416 of string_sprintf() is now avoided.
3418 18. $message_body_size was not set (it was always zero) when running the DATA
3419 ACL and the local_scan() function.
3421 19. For the "mail" command in an Exim filter, no default was being set for
3422 the once_repeat time, causing a random time value to be used if "once" was
3423 specified. (If the value happened to be <= 0, no repeat happened.) The
3424 default is now 0s, meaning "never repeat". The "vacation" command was OK
3425 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3426 (I found it when inspecting the code).
3428 20. There is now an overall timeout for performing a callout verification. It
3429 defaults to 4 times the callout timeout, which applies to individual SMTP
3430 commands during the callout. The overall timeout applies when there is more
3431 than one host that can be tried. The timeout is checked before trying the
3432 next host. This prevents very long delays if there are a large number of
3433 hosts and all are timing out (e.g. when the network connections are timing
3434 out). The value of the overall timeout can be changed by specifying an
3435 additional sub-option for "callout", called "maxwait". For example:
3437 verify = sender/callout=5s,maxwait=20s
3439 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3440 to the end before writing, but this should make it even safer).
3442 22. Exim was forgetting that it had advertised PIPELINING for the second and
3443 subsequent messages on an SMTP connection. It was also not resetting its
3444 memory on STARTTLS and an internal HELO.
3446 23. When Exim logs an SMTP synchronization error within a session, it now
3447 records whether PIPELINING has been advertised or not.
3449 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3450 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3451 rather than long int.
3453 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3455 26. Added the never_mail option to autoreply.
3461 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3462 crash if the getsockname() call failed; this can happen if a connection is
3463 closed very soon after it is established. The problem was simply in the
3464 order in which certain operations were done, causing Exim to try to write
3465 to the SMTP stream before it had set up the file descriptor. The bug has
3466 been fixed by making things happen in the correct order.
3472 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3473 before the connection was closed, thus losing the rejection response.
3475 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3476 some early Solaris releases, but causes trouble in current releases where
3477 socklen_t is defined.
3479 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3482 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3485 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3486 that releasing the top of it at the end releases what was used for sub-
3487 expansions (unless the block got too big). However, discard this block if
3488 the first thing is a variable or header, so that we can use its block when
3489 it is dynamic (useful for very large $message_headers, for example).
3491 6. Lookups now cache *every* query, not just the most recent. A new, separate
3492 store pool is used for this. It can be recovered when all lookup caches are
3493 flushed. Lookups now release memory at the end of their result strings.
3494 This has involved some general refactoring of the lookup sources.
3496 7. Some code has been added to the store_xxx() functions to reduce the amount
3497 of flapping under certain conditions.
3499 8. log_incoming_interface used to affect only the <= reception log lines. Now
3500 it causes the local interface and port to be added to several more SMTP log
3501 lines, for example "SMTP connection from", and rejection lines.
3503 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3505 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3507 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3508 could be overwritten at the end of the current message (or the start of a
3509 new message if it was set in a HELO ACL). The value is now preserved for
3510 the duration of the SMTP connection.
3512 12. If a transport had a headers_rewrite setting, and a matching header line
3513 contained an unqualified address, that address was qualified, even if it
3514 did not match any rewriting rules. The underlying bug was that the values
3515 of the flags that permit the existence of unqualified sender and recipient
3516 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3517 non-local messages, and by -bnq for local messages) were not being
3518 preserved with the message after it was received.
3520 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3521 "next input=" as part of the text comprising the host identity instead of
3522 the correct text. The code was using the same buffer for two different
3523 strings. However, depending on which order the printing function evaluated
3524 its arguments, the bug did not always show up. Under Linux, for example, my
3525 test suite worked just fine.
3527 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3528 doesn't work with some older versions of Perl. It has been changed to "my",
3529 which in any case is probably the better facility to use.
3531 15. A really picky compiler found some instances of statements for creating
3532 error messages that either had too many or two few arguments for the format
3535 16. The size of the buffer for calls to the DNS resolver has been increased
3536 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3537 for addresses that have a lot of PTR records. This alleviates a problem; it
3538 does not fully solve it.
3540 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3541 buffer now truncates the list and logs the incident, which is the same
3542 action as happens when Exim is looking up a host name and its aliases.
3543 Previously in this situation something unpredictable would happen;
3544 sometimes it was "internal error: store_reset failed".
3546 18. If a server dropped the connection unexpectedly when an Exim client was
3547 using GnuTLS and trying to read a response, the client delivery process
3548 crashed while trying to generate an error log message.
3550 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3551 string, for example:
3553 warn message = H1: something\nH2: something
3555 the text was added as a single header line from Exim's point of view
3556 though it ended up OK in the delivered message. However, searching for the
3557 second and subsequent header lines using $h_h2: did not work. This has been
3558 fixed. Similarly, if a system filter added multiple headers in this way,
3559 the routers could not see them.
3561 20. Expanded the error message when iplsearch is called with an invalid key to
3562 suggest using net-iplsearch in a host list.
3564 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3565 ACLs are no longer actually imposed (and a message to that effect is
3568 22. If a "gecos" field in a passwd entry contained escaped characters, in
3569 particular, if it contained a \" sequence, Exim got it wrong when building
3570 a From: or a Sender: header from that name. A second bug also caused
3571 incorrect handling when an unquoted " was present following a character
3572 that needed quoting.
3574 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3575 was not being matched caselessly.
3577 24. Arranged for all hyphens in the exim.8 source to be escaped with
3580 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3581 properly. Recipient callout cache records were still being keyed to include
3582 the sender, even when use_sender was set false. This led to far more
3583 callouts that were necessary. The sender is no longer included in the key
3584 when use_sender is false.
3586 26. Added "control = submission" modifier to ACLs.
3588 27. Added the ${base62d: operator to decode base 62 numbers.
3590 28. dnsdb lookups can now access SRV records.
3592 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3593 the configuration file.
3595 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3596 (-v) mode. This makes the output for a verbose queue run more intelligible.
3598 31. Added a use_postmaster feature to recipient callouts.
3600 32. Added the $body_zerocount variable, containing the number of binary zero
3601 bytes in the message body.
3603 33. The time of last modification of the "new" subdirectory is now used as the
3604 "mailbox time last read" when there is a quota error for a maildir
3607 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3609 35. Added +ignore_unknown as a special item in host lists.
3611 36. Code for decoding IPv6 addresses in host lists is now included, even if
3612 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3613 address was recognized as an IP address, but was then not correctly decoded
3614 into binary, causing unexpected and incorrect effects when compared with
3621 1. Very minor rewording of debugging text in manualroute to say "list of
3622 hosts" instead of "hostlist".
3624 2. If verify=header_syntax was set, and a header line with an unqualified
3625 address (no domain) and a large number of spaces between the end of the
3626 name and the colon was received, the reception process suffered a buffer
3627 overflow, and (when I tested it) crashed. This was caused by some obsolete
3628 code that should have been removed. The fix is to remove it!
3630 3. When running in the test harness, delay a bit after writing a bounce
3631 message to get a bit more predictability in the log output.
3633 4. Added a call to search_tidyup() just before forking a reception process. In
3634 theory, someone could use a lookup in the expansion of smtp_accept_max_
3635 per_host which, without the tidyup, could leave open a database connection.
3637 5. Added the variables $recipient_data and $sender_data which get set from a
3638 lookup success in an ACL "recipients" or "senders" condition, or a router
3639 "senders" option, similar to $domain_data and $local_part_data.
3641 6. Moved the writing of debug_print from before to after the "senders" test
3644 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3645 problems for message scanning, either using a data ACL, or using
3646 local_scan() because the Received: header was not generated till after they
3647 were called (in order to set the time as the time of reception completion).
3648 I have revised the way this works. The header is now generated after the
3649 body is received, but before the ACL or local_scan() are called. After they
3650 are run, the timestamp in the header is updated.
3656 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3657 before starting a queue runner without re-exec. This happened only when
3658 deliver_drop_privilege was set or when the Exim user was set to root. The
3659 effect of the bug was that timeouts during subsequent deliveries caused
3660 crashes instead of being properly handled. The handler is now left at its
3661 default (and expected) setting.
3663 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3664 message, again when deliver_drop_privilege is set or Exim is run as root.
3665 The bug described in (1) was not present in this case, but the tidying up
3666 of the other signals was missing. I have made the two cases consistent.
3668 3. The ignore_target_hosts setting on a manualroute router was being ignored
3669 for hosts that were looked up using the /MX notation.
3671 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3674 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3675 operated on the sender address. After changing the $sender_address to <>
3676 for the sender address verify, Exim was re-instated it as the original
3677 (before rewriting) address, but remembering that it had rewritten it, so it
3678 wasn't rewriting it again. This bug also had the effect of breaking the
3679 sender address verification caching when the sender address was rewritten.
3681 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3682 This has been changed so that if the ip literal address matches
3683 ignore_target_hosts, the router declines.
3685 7. Added expansion conditions match_domain, match_address, and match_local_
3686 part (NOT match_host).
3688 8. The placeholder for the Received: header didn't have a length field set.
3690 9. Added code to Exim itself and to exim_lock to test for a specific race
3691 condition that could lead to file corruption when using MBX delivery. The
3692 issue is with the lockfile that is created in /tmp. If this file is removed
3693 after a process has opened it but before that process has acquired a lock,
3694 there is the potential for a second process to recreate the file and also
3695 acquire a lock. This could lead to two Exim processes writing to the file
3696 at the same time. The added code performs the same test as UW imapd; it
3697 checks after acquiring the lock that its file descriptor still refers to
3698 the same named file.
3700 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3701 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3704 11. Added the smtp_active_hostname option. If used, this will typically be made
3705 to depend on the incoming interface address. Because $interface_address is
3706 not set up until the daemon has forked a reception process, error responses
3707 that can happen earlier (such as "too many connections") no longer contain
3710 12. If an expansion in a condition on a "warn" statement fails because a lookup
3711 defers, the "warn" statement is abandoned, and the next ACL statement is
3712 processed. Previously this caused the whole ACL to be aborted.
3714 13. Added the iplsearch lookup type.
3716 14. Added ident_timeout as a log selector.
3718 15. Added tls_certificate_verified as a log selector.
3720 16. Added a global option tls_require_ciphers (compare the smtp transport
3721 option of the same name). This controls incoming TLS connections.
3723 17. I finally figured out how to make tls_require_ciphers do a similar thing
3724 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3725 before starting the TLS session.
3727 18. Tabs are now shown as \t in -bP output.
3729 19. If the log selector return_path_on_delivery was set, Exim crashed when
3730 bouncing a message because it had too many Received: header lines.
3732 20. If two routers both had headers_remove settings, and the first one included
3733 a superfluous trailing colon, the final name in the first list and the
3734 first name in the second list were incorrectly joined into one item (with a
3735 colon in the middle).
3741 1. Added -C and -D options to the exinext utility, mainly to make it easier
3742 to include in the automated testing, but these could be helpful when
3743 multiple configurations are in use.
3745 2. The exinext utility was not formatting the output nicely when there was
3746 an alternate port involved in the retry record key, nor when there was a
3747 message id as well (for retries that were specific to a specific message
3748 and a specific host). It was also confused by IPv6 addresses, because of
3749 the additional colons they contain. I have fixed the IPv4 problem, and
3750 patched it up to do a reasonable job for IPv6.
3752 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3753 delivery, the log line now contains "pipelined" if PIPELINING was used.
3755 4. An SMTP transport process used to panic and die if the bind() call to set
3756 an explicit outgoing interface failed. This has been changed; it is now
3757 treated in the same way as a connect() failure.
3759 5. A reference to $sender_host_name in the part of a conditional expansion
3760 that was being skipped was still causing a DNS lookup. This no longer
3763 6. The def: expansion condition was not recognizing references to header lines
3764 that used bh_ and bheader_.
3766 7. Added the _cache feature to named lists.
3768 8. The code for checking quota_filecount in the appendfile transport was
3769 allowing one more file than it should have been.
3771 9. For compatibility with Sendmail, the command line option
3779 and sets the incoming protocol and host name (for trusted callers). The
3780 host name and its colon can be omitted when only the protocol is to be set.
3781 Note the Exim already has two private options, -pd and -ps, that refer to
3782 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3783 "s", but I don't think that's a major issue.
3785 10. A number of refactoring changes to the code, none of which should affect
3788 (a) The number of logging options was getting close to filling up the
3789 32-bit word that was used as a bit map. I have split them into two classes:
3790 those that are passed in the argument to log_write(), and those that are
3791 only ever tested independently outside of that function. These are now in
3792 separate 32-bit words, so there is plenty of room for expansion again.
3793 There is no change in the user interface or the logging behaviour.
3795 (b) When building, for example, log lines, the code previously used a
3796 macro that called string_cat() twice, in order to add two strings. This is
3797 not really sufficiently general. Furthermore, there was one instance where
3798 it was actually wrong because one of the argument was used twice, and in
3799 one call a function was used. (As it happened, calling the function twice
3800 did not affect the overall behaviour.) The macro has been replaced by a
3801 function that can join an arbitrary number of extra strings onto a growing
3804 (c) The code for expansion conditions now uses a table and a binary chop
3805 instead of a serial search (which was left over from when there were very
3806 few conditions). Also, it now recognizes conditions like "pam" even when
3807 the relevant support is not compiled in: a suitably worded error message is
3808 given if an attempt is made to use such a condition.
3810 11. Added ${time_interval:xxxxx}.
3812 12. A bug was causing one of the ddress fields not to be passed back correctly
3813 from remote delivery subprocesses. The field in question was not being
3814 subsequently used, so this caused to problems in practice.
3816 13. Added new log selectors queue_time and deliver_time.
3818 14. Might have fixed a bug in maildirsizefile handling that threw up
3819 "unexpected character" debug warnings, and recalculated the data
3820 unnecessarily. In any case, I expanded the warning message to give more
3823 15. Added the message "Restricted characters in address" to the statements in
3824 the default ACL that block characters like @ and % in local parts.
3826 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3827 Three changes have been made:
3829 (a) There was a serious bug; a negative response to MAIL caused the whole
3830 recipient domain to be cached as invalid, thereby blocking all messages
3831 to all local parts at the same domain, from all senders. This bug has
3832 been fixed. The domain is no longer cached after a negative response to
3833 MAIL if the sender used is not empty.
3835 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3838 (c) A new callout option, "use_sender" has been added for people who want
3839 the modified behaviour.
3845 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3848 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3849 indeed breaks things for older releases.
3851 3. Added additional logging to the case where there is a problem reading data
3852 from a filter that is running in a subprocess using a pipe, in order to
3853 try to track down a specific problem.
3855 4. Testing facility fudge: when running in the test harness and attempting
3856 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3857 getting "No route to host". Convert this to a timeout.
3859 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3862 6. Some OS don't have socklen_t but use size_t instead. This affects the
3863 fifth argument of getsockopt() amongst other things. This is now
3864 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3865 can be set for individual OS. I have set it for SunOS5, OSF1, and
3866 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3867 some earlier ones do not.
3869 7. Change 4.30/15 was not doing the test caselessly.
3871 8. The standard form for an IPv6 address literal was being rejected by address
3872 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3873 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3874 this, as well as the form without the "IPv6" on the front (but only when
3875 address literals are enabled, of course).
3877 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3879 10. Exim crashed if a message with an empty sender address specified by -f
3880 encountered a router with an errors_to setting. This could be provoked only
3881 by a command such as
3885 where an empty string was supplied; "<>" did not hit this bug.
3887 11. Installed PCRE release 4.5.
3889 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3890 remained set. It is now erased.
3892 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3893 times from message ids (which are base 36 rather than the normal 62).
3895 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3896 were being counted as actual protocol errors, and logged if the log
3897 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3898 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3899 and DATA following a set of rejected RCPTs do not count as protocol errors.
3900 In other words, Exim assumes they were pipelined, though this may not
3901 actually be the case. Of course, in all cases the client gets an
3902 appropriate error code.
3904 15. If a lookup fails in an ACL condition, a message about the failure may
3905 be available; it is used if testing the ACL cannot continue, because most
3906 such messages specify what the cause of the deferral is. However, some
3907 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3908 that caused an old message to be retained and used if a later statement
3909 caused a defer, replacing the real cause of the deferral.
3911 16. If an IP address had so many PTR records that the DNS lookup buffer
3912 was not large enough to hold them, Exim could crash while trying to process
3913 the truncated data. It now detects and logs this case.
3915 17. Further to 4.21/58, another change has been made: if (and only if) the
3916 first line of a message (the first header line) ends with CRLF, a bare LF
3917 in a subsequent header line has a space inserted after it, so as not to
3918 terminate the header.
3920 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3921 unnecessarily, used atoi() instead of strtol(), and didn't check the
3922 termination when getting file sizes from file names by regex.
3924 19. Completely re-implemented the support for maildirsize files, in the light
3925 of a number of problems with the previous contributed implementation
3926 (4.30/29). In particular:
3928 . If the quota is zero, the maildirsize file is maintained, but no quota is
3931 . If the maildir directory does not exist, it is created before any attempt
3932 to write a maildirsize file.
3934 . The quota value in the file is just a cache; if the quota is changed in
3935 the transport, the new value overrides.
3937 . A regular expression is available for excluding directories from the
3940 20. The autoreply transport checks the characters in options that define the
3941 message's headers; it allows continued headers, but it was checking with
3942 isspace() after an embedded newline instead of explicitly looking for a
3945 21. If all the "regular" hosts to which an address was routed had passed their
3946 expiry times, and had not reached their retry times, the address was
3947 bounced, even if fallback hosts were defined. Now Exim should go on to try
3950 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3951 equivalent code in the SMTP transport. Some hosts send humungous responses
3952 to HELO/EHLO, more than 1024 it seems.
3954 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3955 gives compiler warnings in some environments. I've now done it "properly",
3958 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3959 (because of problems with the built-in one) was declared to return uschar *
3960 instead of char *, causing compiler failure.
3962 25. Fixed a file descriptor leak when processing alias/forward files.
3964 26. Fixed a minor format string issue in dbfn.c.
3966 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3968 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3969 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3972 29. When a sender address is verified, it is cached, to save repeating the test
3973 when there is more than one recipient in a message. However, when the
3974 verification involves a callout, it is possible for different callout
3975 options to be set for different recipients. It is too complicated to keep
3976 track of this in the cache, so now Exim always runs a verification when a
3977 callout is required, relying on the callout cache for the optimization.
3978 The overhead is duplication of the address routing, but this should not be
3981 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3982 to be verified with callout=postmaster, and the main callout worked but the
3983 postmaster check failed, the verification correctly failed. However, if a
3984 subsequent RCPT command asked for sender verification *without* the
3985 postmaster check, incorrect caching caused this verification also to fail,
3988 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3989 it was not caching the DNS options (qualify_single, search_parents) that
3990 were used when the lookup failed. A subsequent lookup with different
3991 options therefore always gave the same answer, though there were cases
3992 where it should not have. (Example: a "domains = !$mx_any" option on a
3993 dnslookup router: the "domains" option is always processed without any
3994 widening, but the router might have qualify_single set.) Now Exim uses the
3995 cached value only when the same options are set.
3997 32. Added John Jetmore's "exipick" utility to the distribution.
3999 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4000 than a timeout (e.g. a certificate is required, and is not provided), an
4001 Exim server now closes the connection immediately. Previously it waited for
4002 the client to close - but if the client is SSL, it seems that they each
4003 wait for each other, leading to a delay before one of them times out.
4005 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4006 maintained 0.8.x compatibility because I don't think many are using it, and
4007 it is clearly obsolete.
4009 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4012 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4013 client certificate was expired. A simple patch fixes this, though I don't
4014 understand the full logic of why the verify callback is called multiple
4017 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4018 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4019 which causes problems with some clients (such as the Certicom SSL Plus
4020 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4021 disables the coutermeasure allowing Eudora to connect."
4023 38. Exim was not checking that a write() to a log file succeeded. This could
4024 lead to Bad Things if a log got too big, in particular if it hit a file
4025 size limit. Exim now panics and dies if it cannot write to a log file, just
4026 as it does if it cannot open a log file.
4028 39. Modified OS/Makefile-Linux so that it now contains
4030 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4032 The two -D definitions ensure that Exim is compiled with large file
4033 support, which makes it possible to handle log files that are bigger than
4036 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4037 instance) a domain was checked against a named list that involved a lookup,
4038 causing $domain_data to be set, then another domain was checked against the
4039 same list, then the first domain was re-checked, the value of $domain_data
4040 after the final check could be wrong. In particular, if the second check
4041 failed, it could be set empty. This bug probably also applied to
4044 41. The strip_trailing_dot option was not being applied to the address given
4045 with the -f command-line option.
4047 42. The code for reading a message's header from the spool was incrementing
4048 $received_count, but never initializing it. This meant that the value was
4049 incorrect (doubled) while delivering a message in the same process in which
4050 it was received. In the most common configuration of Exim, this never
4051 happens - a fresh exec is done - but it can happen when
4052 deliver_drop_privilege is set.
4054 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4055 it now includes up to 150 characters of the unexpected data in the log
4058 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4059 and building data strings. The size of both of these buffers was 10 000
4060 bytes - far larger than anybody would *ever* want, thought I. Needless to
4061 say, somebody hit the limit. I have increased the maximum line length to
4062 20 000 and the maximum data length of concatenated lines to 100 000. I have
4063 also fixed two bugs, because there was no checking on these buffers. Tsk,
4064 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4065 buffer is too small.
4067 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4068 lsearch lookups. Now it does.
4070 46. When parsing a route_list item in a manualroute router, a fixed-length
4071 buffer was used for the list of hosts. I made this 1024 bytes long,
4072 thinking that nobody would ever have a list of hosts that long. Wrong.
4073 Somebody had a whole pile of complicated expansion conditions, and the
4074 string was silently truncated, leading to an expansion error. It turns out
4075 that it is easier to change to an unlimited length (owing to other changes
4076 that have happened since this code was originally written) than to build
4077 structure for giving a limitation error. The length of the item that
4078 expands into the list of hosts is now unlimited.
4080 47. The lsearch lookup could not handle data where the length of text line was
4081 more than 4095 characters. Such lines were truncated, leading to shortened
4082 data being returned. It should now handle lines of any length.
4084 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4085 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4088 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4089 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4090 no longer happens in comment lines. A list of replacements is now placed
4091 at the head of all of the source files, except those whose only change is
4092 to replace PERL_COMMAND in the very first #! line.
4094 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4095 messages on the queue, with a bottom-up merge sort, using code contributed
4096 by Michael Haardt. This should make operations like -bp somewhat faster on
4097 large queues. It won't affect queue runners, except when queue_run_in_order
4100 51. Installed eximstats 1.31 in the distribution.
4102 52. Added support for SRV lookups to the dnslookup router.
4104 53. If an ACL referred to $message_body or $message_body_end, the value was not
4105 reset for any messages that followed in the same SMTP session.
4107 54. The store-handling optimization for building very long strings was not
4108 differentiating between the different store pools. I don't think this
4109 actually made any difference in practice, but I've tidied it.
4111 55. While running the routers to verify a sender address, $sender_address
4112 was still set to the sender address. This is wrong, because when routing to
4113 send a bounce to the sender, it would be empty. Therefore, I have changed
4114 it so that, while verifying a sender address, $sender_address is set to <>.
4115 (There is no change to what happens when verifying a recipient address.)
4117 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4118 target A or AAAA records (if not already returned) without resetting the
4119 qualify_single or search_parents options of the DNS resolver. These are
4120 inappropriate in this case because the targets of MX and SRV records must
4121 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4122 target that, when qualified, matched something in the local domain. These
4123 two options are now turned off when doing these lookups.
4125 57. It seems that at least some releases of Reiserfs (which does not have the
4126 concept of a fixed number of inodes) returns zero and not -1 for the
4127 number of available inodes. This interacted badly with check_spool_inodes,
4128 which assumed that -1 was the "no such thing" setting. What I have done is
4129 to check that the total number of inodes is greater than zero before doing
4130 the test of how many are available.
4132 58. When a "warn" ACL statement has a log_message modifier, the message is
4133 remembered, and not repeated. This is to avoid a lot of repetition when a
4134 message has many recipients that cause the same warning to be written.
4135 Howewer, Exim was preserving the list of already written lines for an
4136 entire SMTP session, which doesn't seem right. The memory is now reset if a
4137 new message is started.
4139 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4140 debugging output unless log_rewrite was also set.
4142 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4143 of (int)(handle) when we know that handle contains (void *)(-1).
4145 61. The Exim daemon panic-logs an error return when it closes the incoming
4146 connection. However "connection reset by peer" seems to be common, and
4147 isn't really an error worthy of noting specially, so that particular error
4150 62. When Exim is trying to find all the local interfaces, it used to panic and
4151 die if the ioctl to get the interface flags failed. However, it seems that
4152 on at least one OS (Solaris 9) it is possible to have an interface that is
4153 included in the list of interfaces, but for which you get a failure error
4154 for this call. This happens when the interface is not "plumbed" into a
4155 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4156 failure of the "get flags" call assumes that the interface is down.
4158 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4159 makes life easier for people who are doing arithmetic on fields extracted
4160 from dates, where you often get leading zeros that should not be
4161 interpreted as octal.
4163 64. Added qualify_domain to the redirect router, to override the global
4166 65. If a pathologically long header line contained very many addresses (the
4167 report of this problem mentioned 10 000) and each of them was rewritten,
4168 Exim could use up a very large amount of memory. (It kept on making new
4169 copies of the header line as it rewrote, and never released the old ones.)
4170 At the expense of a bit more processing, the header rewriting function has
4171 been changed so that it no longer eats memory in this way.
4173 66. The generation of the Received: header has been moved from the time that a
4174 message starts to be received, to the time that it finishes. The timestamp
4175 in the Received: header should now be very close to that of the <= log
4176 line. There are two side-effects of this change:
4178 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4179 logged header lines no longer include the local Received: line, because
4180 it has not yet been created. The same applies to a copy of the message
4181 that is returned to a non-SMTP sender when a message is rejected.
4183 (b) When a filter file is tested using -bf, no additional Received: header
4184 is added to the test message. After some thought, I decided that this
4187 This change does not affect the value of $received_for. It is still set
4188 after address rewriting, but before local_scan() is called.
4190 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4192 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4193 gave an unhelpful panic error message, and a defer error. I have managed to
4194 change this behaviour so that it now rejects any supplied certificate,
4195 which seems right, as the list of acceptable certificates is empty.
4197 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4198 gave an unhelpful defer error. I have not managed to make this reject any
4199 supplied certificates, but the error message it gives is "no certificate
4200 supplied", which is not helpful.
4202 70. exigrep's output now also includes lines that are not associated with any
4203 message, but which match the given pattern. Implemented by a patch from
4204 Martin Sluka, which also tidied up the Perl a bit.
4206 71. Recipient callout verification, like sender verification, was using <> in
4207 the MAIL FROM command. This isn't really the right thing, since the actual
4208 sender may affect whether the remote host accepts the recipient or not. I
4209 have changed it to use the actual sender in the callout; this means that
4210 the cache record is now keyed on a recipient/sender pair, not just the
4211 recipient address. There doesn't seem to be a real danger of callout loops,
4212 since a callout by the remote host to check the sender would use <>.
4213 [SEE ABOVE: changed after hitting problems.]
4215 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4216 temporary errors. However, in the case of such a code being given after
4217 the end of a data transmission (i.e. after ".") Exim was failing to write
4218 a retry record for the message. (Yes, there was some broken host that was
4219 actually sending 8xx at this point.)
4221 73. An unknown lookup type in a host list could cause Exim to panic-die when
4222 the list was checked. (An example that provoked this was putting <; in the
4223 middle of a list instead of at the start.) If this happened during a DATA
4224 ACL check, a -D file could be left lying around. This kind of configuration
4225 error no longer causes Exim to die; instead it causes a defer errror. The
4226 incident is still logged to the main and panic logs.
4228 74. Buglet left over from Exim 3 conversion. The message "too many messages
4229 in one connection" was written to the rejectlog but not the mainlog, except
4230 when address rewriting (yes!) was being logged.
4232 75. Added write_rejectlog option.
4234 76. When a system filter was run not as root (that is, when system_filter_user
4235 was set), the values of the $n variables were not being returned to the
4236 main process; thus, they were not subsequently available in the $sn
4239 77. Added +return_path_on_delivery log selector.
4241 78. A connection timeout was being treated differently from recipients deferred
4242 when testing hosts_max_try with a message that was older than the host's
4243 retry timeout. (The host should not be counted, thus allowing all hosts to
4244 be tried at least once before bouncing.) This may have been the cause of an
4245 occasionally reported bug whereby a message would remain on the queue
4246 longer than the retry timeout, but would be bounced if a delivery was
4247 forced. I say "may" because I never totally pinned down the problem;
4248 setting up timeout/retry tests is difficult. See also the next item.
4250 79. The ultimate address timeout was not being applied to errors that involved
4251 a combination of host plus message (for example, a timeout on a MAIL
4252 command). When an address resolved to a number of possible hosts, and they
4253 were not all tried for each delivery (e.g. because of hosts_max_try), a
4254 message could remain on the queue longer than the retry timeout.
4256 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4259 81. Fixed an obscure SMTP outgoing bug which required at least the following
4260 conditions: (a) there was another message waiting for the same server;
4261 (b) the server returned 5xx to all RCPT commands in the first message so
4262 that the message was not completed; (c) the server dropped the connection
4263 or gave a negative response to the RSET that Exim sends to abort the
4264 transaction. The observed case was a dropped connection after DATA that had
4265 been sent in pipelining mode. That is, the server had advertised PIPELINING
4266 but was not implementing it correctly. The effect of the bug was incorrect
4267 behaviour, such as trying another host, and this could lead to a crash.
4273 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4274 and daemon.c were passed as pointers to ints; they should have been
4275 pointers to socklen_t variables (which are typically unsigned ints).
4277 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4280 3. Fixed a really odd bug that affected only the testing scheme; patching a
4281 certain fixed string in the binary changed the value of another string that
4282 happened to be identical to the end of the original first string.
4284 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4285 name", it returns that address as the IP address. On some operating
4286 systems (e.g. Solaris), it also passes back the IP address string as the
4287 "host name". However, on others (e.g. Linux), it passes back an empty
4288 string. Exim wasn't checking for this, and was changing the host name to an
4289 empty string, assuming it had been canonicized.
4291 5. Although rare, it is permitted to have more than one PTR record for a given
4292 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4293 all the names associated with an address, because they do in Solaris.
4294 However, it seems that they do not in Linux for data that comes from the
4295 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4296 I found this out when I moved to a new Linux workstation and tried to run
4297 the Exim test suite.
4299 To get round this problem I have changed the code so that it now does its
4300 own call to the DNS to look up PTR records when searching for a host name.
4301 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4302 addresses that are only in /etc/hosts are still found.
4304 This behaviour is, however, controlled by an option called host_lookup_
4305 order, which defaults to "bydns:byaddr". If people want to use the other
4306 order, or indeed, just use one or the other means of lookup, they can
4307 specify it in this variable.
4309 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4310 some operating systems, this comes back from gethostbyaddr() as an empty
4311 string, and this is what Exim used to test for. However, it seems that in
4312 other systems, "." is yielded. Exim now tests for this case too.
4314 7. The values of check_spool_space and check_log_space are now held internally
4315 as a number of kilobytes instead of an absolute number of bytes. If a
4316 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4317 kilobyte. This means that much larger values can be stored.
4319 8. Exim monitor: an attempt to get the action menu when not actually pointing
4320 at a message produces an empty menu entitled "No message selected". This
4321 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4322 no entries in it ("Shell widget menu has zero width and/or height"). So I
4323 have added a single, blank menu entry in this case.
4325 9. Added ${quote_local_part.
4327 10. MIME decoding is now applied to the contents of Subject: header lines when
4330 11. Now that a reference to $sender_host_address automatically causes a reverse
4331 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4332 host lookup before query-style lookups in lists that might use this
4333 variable. This has therefore been abolished, and the "net-" prefix is no
4334 longer necessary for query-style lookups.
4336 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4337 have been a typo for LFLAGS, so it has been changed.
4339 13. The install script calls Exim with "-C /dev/null" in order to find the
4340 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4341 to be output. Howeve, since Exim outputs its version number before the
4342 error, it didn't break the script. It just looked ugly. I fixed this by
4343 always allowing "-C /dev/null" if the caller is root.
4345 14. Ignore overlarge ACL variable number when reading spool file - insurance
4346 against a later release with more variables having written the file.
4348 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4349 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4350 this, as well as the form without the "IPv6" on the front.
4352 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4353 OS/Makefile-Darwin file.
4355 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4356 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4358 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4359 variable. However, some OS use ints for inodes. I've added cast to long int
4360 to get rid of the compiler warning.
4362 19. I had forgotten to lock out "/../" in configuration file names when
4363 ALT_CONFIG_PREFIX was set.
4365 20. Routers used for verification do not need to specify transports. However,
4366 if such a router generated a host list, and callout was configured, Exim
4367 crashed, because it could not find a port number from the (non-existent)
4368 transport. It now assumes port 25 in this circumstance.
4370 21. Added the -t option to exigrep.
4372 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4373 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4374 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4375 them is set, LOOKUP_LSEARCH is forced.
4377 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4379 24. Added sender and host information to the "rejected by local_scan()" log
4380 line; previously there was no indication of these.
4382 25. Added .include_if_exists.
4384 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4385 Linux. It turns out that not all file systems support this. Apparently some
4386 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4387 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4388 not supported on the file descriptor, is now ignored when Exim is trying to
4389 sync a directory. This applies only to Linux.
4391 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4393 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4394 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4397 29. Added support for maildirsize files from supplied patch (modified a bit).
4399 30. The use of :fail: followed by an empty string could lead Exim to respond to
4400 sender verification failures with (e.g.):
4402 550 Verification failed for <xxx>
4403 550 Sender verify failed
4405 where the first response line was missing the '-' that indicates it is not
4406 the final line of the response.
4408 31. The loop for finding the name of the user that called Exim had a hardwired
4409 limit of 10; it now uses the value of finduser_retries, which is used for
4410 all other user lookups.
4412 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4415 33. Exim was neglecting to zero errno before one call of strtol() when
4416 expanding a string and expecting an integer value. On some systems this
4417 resulted in spurious "integer overflow" errors. Also, it was casting the
4418 result into an int without checking.
4420 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4421 did not work. The code looks as if it has *never* worked, though it appears
4422 to have been documented since at least releast 1.62. I have made it work.
4424 35. The "timeout_DNS" error in retry rules, also documented since at least
4425 1.62, also never worked. As it isn't clear exactly what this means, and
4426 clearly it isn't a major issue, I have abolished the feature by treating it
4427 as "timeout", and writing a warning to the main and panic logs.
4429 36. The display of retry rules for -brt wasn't always showing the error code
4432 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4433 timeout_connect_A, timeout_connect_MX.
4435 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4436 to the empty sender.
4438 39. The daemon was not analysing the content of -oX till after it had closed
4439 stderr and disconnected from the controlling terminal. This meant that any
4440 syntax errors were only noted on the panic log, and the return code from
4441 the command was 0. By re-arranging the code a little, I've made the
4442 decoding happen first, so such errors now appear on stderr, and the return
4443 code is 1. However, the actual setting up of the sockets still happens in
4444 the disconnected process, so errors there are still only recorded on the
4447 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4448 connections (as happens on some IP stacks) was logged at start up time as
4449 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4450 it from "IPv6 and IPv4", which means that two separate sockets are being
4453 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4454 says whether AF_INET or AF_INET6 was passed as an argument.
4456 42. Exiwhat output was messed up when time zones were included in log
4459 43. Exiwhat now gives more information about the daemon's listening ports,
4460 and whether -tls-on-connect was used.
4462 44. The "port" option of the smtp transport is now expanded.
4464 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4465 silently ignored. Now an error message is written to the main and panic
4468 46. There's a new ACL modifier called "logwrite" which writes to a log file
4469 as soon as it is encountered.
4471 47. Added $local_user_uid and $local_user_gid at routing time.
4473 48. Exim crashed when trying to verify a sender address that was being
4476 49. Exim was recognizing only a space character after ".include". It now also
4477 recognizes a tab character.
4479 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4480 extracting the relevant information from the specification. The man page no
4481 longer contains scrambled data for the -d option, and I've added a section
4482 at the front about calling Exim under different names.
4484 51. Added "extra_headers" argument to the "mail" command in filter files.
4486 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4489 53. Installed eximstats 1.29.
4491 54. Added transport_filter_timeout as a generic transport option.
4493 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4494 Cc: header lines. This was required by RFC 822, but it not required by RFC
4497 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4498 incoming messages that did not have them. Now it does so only if the
4499 message originates locally, that is, if there is no associated remote host
4500 address. When Resent- header lines are present, this applies to the Resent-
4501 lines rather than the non-Resent- lines.
4503 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4504 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4506 58. Messages for configuration errors now include the name of the main
4507 configuration file - useful now that there may be more than one file in a
4508 list (.included file names were always shown).
4510 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4511 for those rare installations that do not start the daemon as root or run it
4512 setuid root. I've cut out the call to initgroups() if the daemon is not
4515 60. The Exim user and group can now be bound into the binary as text strings
4516 that are looked up at the start of Exim's processing.
4518 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4520 62. Added $mailstore_basename variable.
4522 63. Installed patch to sieve.c from Michael Haardt.
4524 64. When Exim failed to open the panic log after failing to open the main log,
4525 the original message it was trying to log was written to stderr and debug
4526 output, but if they were not available (the usual case in production), it
4527 was lost. Now it is written to syslog before the two lines that record the
4528 failures to open the logs.
4530 65. Users' Exim filters run in subprocesses under the user's uid. It is
4531 possible for a "deliver" command or an alias in a "personal" command to
4532 provoke an address rewrite. If logging of address rewriting is configured,
4533 this fails because the process is not running as root or exim. There may be
4534 a better way of dealing with this, but for the moment (because 4.30 needs
4535 to be released), I have disabled address rewrite logging when running a
4536 filter in a non-root, non-exim process.
4542 1. The buildconfig auxiliary program wasn't quoting the value set for
4543 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4544 not defined. This bug was masked in 4.22 by the effect that was fixed in
4547 2. Some messages that were rejected after a message id was allocated were
4548 shown as "incomplete" by exigrep. It no longer does this for messages that
4549 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4551 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4552 have allow_domain_literals set, the ID did not get logged in the <= line.
4553 Domain literals are now always recognized in Message-ID: header lines.
4555 4. The first argument for a ${extract expansion item is the key name or field
4556 number. Leading and trailing spaces in this item were not being ignored,
4557 causing some misleading effects.
4559 5. When deliver_drop_privilege was set, single queue runner processes started
4560 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4561 same command in the process it spins off) were not dropping privilege.
4563 6. When the daemon running as "exim" started a queue runner, it always
4564 re-executed Exim in the spun-off process. This is a waste of effort when
4565 deliver_drop_privilege is set. The new process now just calls the
4566 queue-runner function directly.
4572 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4575 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4576 ignored. Though the use of -oP was forcing the writing of a pid file, it
4577 was always written to the default place.
4579 3. If the message "no IP address found for host xxxx" is generated during
4580 incoming verification, it is now followed by identification of the incoming
4581 connection (so you can more easily find what provoked it).
4583 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4585 5. Added some features to "harden" Exim a bit more against certain attacks:
4587 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4588 be put in Local/Makefile. This is like the never_users runtime option,
4589 but it cannot be overridden. The default setting is "root".
4591 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4592 prefix string with which any file named in a -C command line option
4595 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4596 is retained for -C and -D only if the caller of Exim is root. Without
4597 it, the exim user may also use -C and -D and retain privilege.
4599 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4600 command line option is disabled.
4602 6. Macro names set by the -D option must start with an upper case letter, just
4603 like macro names defined in the configuration file.
4605 7. Added "dereference=" facility to LDAP.
4607 8. Two instances of the typo "uknown" in the source files are fixed.
4609 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4610 the Configure-Makefile script screwed up while processing it.
4612 10. Incorporated PCRE 4.4.
4614 11. The SMTP synchronization check was not operating right at the start of an
4615 SMTP session. For example, it could not catch a HELO sent before the client
4616 waited for the greeting. There is now a check for outstanding input at the
4617 point when the greeting is written. Because of the duplex, asynchronous
4618 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4619 way, but not yet received, when the check is performed.
4621 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4622 on TCP/IP sockets, because this apparently causes some broken clients to
4625 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4626 unchanged) from the Cygwin maintainer.
4628 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4629 was supported instead of testing for mbx. Effectively a typo.
4631 15. The spa authenticator server code was not checking that the input it
4632 received was valid base64.
4634 16. The debug output line for the "set" modifier in ACLs was not showing the
4635 name of the variable that was being set.
4637 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4639 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4640 lookup on its own. Something else was needed to trigger the lookup. For
4641 example, a match in host_lookup or the need for a host name in a host list.
4642 Now, if $sender_host_name is referenced and the host name has not yet been
4643 looked up, a lookup is performed. If the lookup fails, the variable remains
4644 empty, and $host_lookup_failed is set to "1".
4646 19. Added "eqi" as a case-independent comparison operator.
4648 20. The saslauthd authentication condition could segfault if neither service
4649 nor realm was specified.
4651 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4652 error message that was logged was misleading, and incoming SMTP
4653 connections were dropped. The message is now more accurate, and temporary
4654 errors are given to SMTP connections.
4656 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4657 (except RSET) with a 421 error, until QUIT is received. However, it was
4658 failing to send a response to QUIT.
4660 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4661 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4662 ACL is now run after the helo_try_verify_hosts code.
4664 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4665 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4666 case-independent, so other case variants are also recognized). Apparently
4667 some systems use these upper case variants.
4669 25. If more than two messages were waiting for the same host, and a transport
4670 filter was specified for the transport, Exim sent two messages over the
4671 same TCP/IP connection, and then failed with "socket operation on non-
4672 socket" when it tried to send the third.
4674 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4676 27. The extern definition of crypt16() in expand.c was not being excluded when
4677 the OS had its own crypt16() function.
4679 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4680 as a preferred synonym for return_size_limit, both as an option and as an
4683 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4685 30. Changed the default configuration ACL to relax the local part checking rule
4686 for addresses that are not in any local domains. For these addresses,
4687 slashes and pipe symbols are allowed within local parts, but the sequence
4688 /../ is explicitly forbidden.
4690 31. SPA server authentication was not clearing the challenge buffer before
4693 32. log_message in a "warn" ACL statement was writing to the reject log as
4694 well as to the main log, which contradicts the documentation and doesn't
4695 seem right (because no rejection is happening). So I have stopped it.
4697 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4698 However, I am unable to do any testing of this.
4700 34. Fixed an infelicity in the appendfile transport. When checking directories
4701 for a mailbox, to see if any needed to be created, it was accidentally
4702 using path names with one or more superfluous leading slashes; tracing
4703 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4705 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4706 contents are added to the log line that is written for every discarded
4707 recipient. (Previously a log_message setting was ignored.)
4709 36. The ${quote: operator now quotes the string if it is empty.
4711 37. The install script runs exim in order to find its version number. If for
4712 some reason other than non-existence or emptiness, which it checks, it
4713 could not run './exim', it was installing it with an empty version number,
4714 i.e. as "exim-". This error state is now caught, and the installation is
4717 38. An argument was missing from the function that creates an error message
4718 when Exim fails to connect to the socket for saslauthd authentication.
4719 This could cause Exim to crash, or give a corrupted message.
4721 39. Added isip, isip4, and isip6 to ${if conditions.
4723 40. The ACL variables $acl_xx are now saved with the message, and can be
4724 accessed later in routers, transports, and filters.
4726 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4727 strings in the file are not string-expanded.
4729 42. If a MAIL command specified a SIZE value that was too large to fit into an
4730 int variable, the check against message_size_limit failed. Such values are
4731 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4732 day this will have to be increased, but I don't think I want to be around
4733 when emails are that large.
4740 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4741 iconv() is not standard in FreeBSD.
4743 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4744 IPv6 enabled. The observed symptom was a segmentation fault on return from
4745 the function os_common_find_running_interfaces() in src/os.c.
4747 3. In the check_special_case() function in daemon.c I had used "errno" as an
4748 argument name, which causes warnings on some systems. This was basically a
4749 typo, since it was named "eno" in the comments!
4751 4. The code that waits for the clock to tick (at a resolution of some fraction
4752 of a second) so as to ensure message-id uniqueness was always waiting for
4753 at least one whole tick, when it could have waited for less. [This is
4754 almost certainly not relevant at current processor speeds, where it is
4755 unlikely to ever wait at all. But we try to future-proof.]
4757 5. The function that sleeps for a time interval that includes fractions of a
4758 second contained a race. It did not block SIGALRM between setting the
4759 timer, and suspending (a couple of lines later). If the interval was short
4760 and the sigsuspend() was delayed until after it had expired, the suspension
4761 never ended. On busy systems this could lead to processes getting stuck for
4764 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4765 process, before it forks any delivery processes. The open lookup caching
4766 mechanism meant that the open file or database connection was passed into
4767 the delivery process. The problem was that delivery processes always tidy
4768 up cached lookup data. This could cause a problem for the next delivery
4769 process started by the queue runner, because the external queue runner
4770 process does not know about the closure. So the next delivery process
4771 still has data in the lookup cache. In the case of a file lookup, there was
4772 no problem because closing a file descriptor in a subprocess doesn't affect
4773 the parent. However, if the lookup was caching a connection to a database,
4774 the connection was closed, and the second delivery process was likely to
4775 see errors such as "PGSQL: query failed: server closed the connection
4776 unexpectedly". The problem has been fixed by closing all cached lookups
4777 in a queue runner before running a delivery process.
4779 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4780 seem to have the "const" qualifier which it has on other OS. I've
4783 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4784 *of the same type* (client or server) with the same public name that an
4785 error should be diagnosed.
4787 9. When Exim looked up a host name for an IP address, but failed to find the
4788 original IP address when looking up the host name (a safety check), it
4789 output the message "<ip address> does not match any IP for NULL", which was
4790 confusing, to say the least. The bug was that the host name should have
4791 appeared instead of "NULL".
4793 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4794 user that is built into the binary, and the -C or -D options is used, root
4795 privilege is dropped before the configuration file is read. In addition,
4796 logging is switched to stderr instead of the normal log files. If the
4797 configuration then re-defines the Exim user, the unprivileged environment
4798 is probably not what is expected, so Exim logs a panic warning message (but
4801 However, if deliver_drop_privilege is set, the unprivileged state may well
4802 be exactly what is intended, so the warning has been cut out in that case,
4803 and Exim is allowed to try to write to its normal log files.
4809 1. smtp_return_error_details was not giving details for temporary sender
4810 or receiver verification errors.
4812 2. Diagnose a configuration error if two authenticators have the same public
4815 3. Exim used not to create the message log file for a message until the first
4816 delivery attempt. This could be confusing when incoming messages were held
4817 for policy or load reasons. The message log file is now created at the time
4818 the message is received, and an initial "Received" line is written to it.
4820 4. The automatically generated man page for command line options had a minor
4821 bug that caused no ill effects; however, a more serious problem was that
4822 the procedure for building the man page automatically didn't always
4823 operate. Consequently, release 4.20 contains an out-of-date version. This
4824 shouldn't happen again.
4826 5. When building Exim with embedded Perl support, the script that builds the
4827 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4828 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4830 6. The freeze_tell option was not being used for messages that were frozen on
4831 arrival, either by an ACL or by local_scan().
4833 7. Added the smtp_incomplete_transaction log selector.
4835 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4836 was accepting AUTH without a new EHLO.
4838 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4839 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4842 10. Logging of TCP/IP connections (when configured) now happens in the main
4843 daemon process instead of the child process, so that the TCP/IP connection
4844 count is more accurate (but it can never be perfect).
4846 11. The use of "drop" in a nested ACL was not being handled correctly in the
4847 outer ACL. Now, if condition failure induced by the nested "drop" causes
4848 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4849 or "require"), the connection is dropped.
4851 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4852 that yield "discard" can now be used with an "accept" or a "discard" verb,
4853 but an error is generated for any others (because I can't see a useful way
4854 to define what should happen).
4856 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4857 are now processed in the same way as lines in the Exim configuration file.
4858 In particular, continuation lines are supported.
4860 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4862 15. Added -ti meaning -t -i.
4864 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4865 domains, and warn by logging if others are found.
4867 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4868 returned from GIFCONF when Exim is trying to find the list of interfaces on
4869 a host. The code in os.c has been modified to copy each ifreq to an aligned
4870 structure in all cases.
4872 Also, in some cases, the returned ifreq's were being copied to a 'struct
4873 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4874 means the last couple of bytes of an IPv6 address could be chopped if the
4875 ifreq contained only a normal sockaddr (14 bytes storage).
4877 18. Named domain lists were not supported in the hosts_treat_as_local option.
4878 An entry such as +xxxx was not recognized, and was treated as a literal
4881 19. Ensure that header lines added by a DATA ACL are included in the reject log
4882 if the ACL subsequently rejects the message.
4884 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4885 MD5 (which is deprecated).
4887 21. When testing a filter file using -bf, Exim was writing a message when it
4888 took the sender from a "From " line in the message, but it was not doing so
4889 when it took $return_path from a Return-Path: header line. It now does.
4891 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4892 with a valid header line field name (a series of printing characters
4893 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4895 23. Changed "disc" in the source to "disk" to conform to the documentation and
4896 the book and for uniformity.
4898 24. Ignore Sendmail's -Ooption=value command line item.
4900 25. When execve() failed while trying to run a command in a pipe transport,
4901 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4902 could be confused with a return value of 69 from the command itself. This
4903 has been changed to 127, the value the shell returns if it is asked to run
4904 a non-existent command. The wording for the related log line suggests a
4905 non-existent command as the problem.
4907 26. If received_header_text expands to an empty string, do not add a Received:
4908 header line to the message. (Well, it adds a token one on the spool, but
4909 marks it "old" so that it doesn't get used or transmitted.)
4911 27. Installed eximstats 1.28 (addition of -nt option).
4913 28. There was no check for failure on the call to getsockname() in the daemon
4914 code. This can fail if there is a shortage of resources on the system, with
4915 ENOMEM, for example. A temporary error is now given on failure.
4917 29. Contrary to the C standard, it seems that in some environments, the
4918 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4919 program. Exim now does this explicitly; it affects the formatting of
4920 timestamps using strftime().
4922 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4923 complaints. I've now initialized all the variables, to avoid this.
4925 32. Header lines added by a system filter were not being "seen" during
4926 transport-time rewrites.
4928 33. The info_callback() function passed to OpenSSL is set up with type void
4929 (*)(SSL *, int, int), as described somewhere. However, when calling the
4930 function (actually a macro) that sets it up, the type void(*)() is
4931 expected. I've put in a cast to prevent warnings from picky compilers.
4933 34. If a DNS black list lookup found a CNAME record, but there were no A
4934 records associated with the domain it pointed at, Exim crashed.
4936 35. If a DNS black list lookup returned more than one A record, Exim ignored
4937 all but the first. It now scans all returned addresses if a particular IP
4938 value is being sought. In this situation, the contents of the
4939 $dnslist_value variable are a list of all the addresses, separated by a
4942 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4943 to accept a host name and all its aliases if the forward lookup for any of
4944 them yielded the IP address of the incoming connection. Now it accepts only
4945 those names whose forward lookup yields the correct IP address. Any other
4946 names are discarded. This closes a loophole whereby a rogue DNS
4947 administrator could create reverse DNS records to break through a
4948 wildcarded host restriction in an ACL.
4950 37. If a user filter or a system filter that ran in a subprocess used any of
4951 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4952 the wrong values were passed to the pipe command ($thisaddress had the
4953 value of $0, $0 had the value of $1, etc). This bug was introduced by
4954 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4956 38. Improved the line breaking for long SMTP error messages from ACLs.
4957 Previously, if there was no break point between 40 and 75 characters, Exim
4958 left the rest of the message alone. Two changes have been made: (a) I've
4959 reduced the minimum length to 35 characters; (b) if it can't find a break
4960 point between 35 and 75 characters, it looks ahead and uses the first one
4961 that it finds. This may give the occasional overlong line, but at least the
4962 remaining text gets split now.
4964 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4965 file descriptors might be low, and that setting 1000 would always raise it.
4966 It turns out that in some environments, the limit is already over 1000 and
4967 that lowering it causes trouble. So now Exim takes care not to decrease it.
4969 40. When delivering a message, the value of $return_path is set to $sender_
4970 address at the start of routing (routers may change the value). By an
4971 oversight, this default was not being set up when an address was tested by
4972 -bt or -bv, which affected the outcome if any router or filter referred to
4975 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4976 log only when "message" or "log_message" are set. However, if one of the
4977 conditions was an address verification, or a call to a nested ACL, the
4978 messages generated by the underlying test were being passed through. This
4979 no longer happens. The underlying message is available in $acl_verify_
4980 message for both "message" and "log_message" expansions, so it can be
4981 passed through if needed.
4983 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4984 new expansion $bh_ to give the encoded byte string without charset
4985 translation. Translation happens only if iconv() is available; HAVE_ICONV
4986 indicates this at build time. HEADERS_CHARSET gives the charset to
4987 translate to; headers_charset can change it in the configuration, and
4988 "headers charset" can change it in an individual filter file.
4990 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4991 that creates RFC 2047 encoded "words" labels them as that charset instead
4992 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4993 expansion operator; (ii) when Exim creates a From: line for a local
4994 message; (iii) when a header line is rewritten to include a "phrase" part.
4996 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4997 buggy, causing it to skip the first lines of messages whose message ID
4998 ended in 'D'. This would not have bitten before Exim release 4.14, because
4999 message IDs were unlikely to end in 'D' before then. The effect was to have
5000 incorrect size information for certain domains.
5002 45. #include "config.h" was missing at the start of the crypt16.c module. This
5003 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5006 46. If there was a timeout during a "random" callout check, Exim treated it as
5007 a failure of the random address, and carried on sending RSET and the real
5008 address. If the delay was just some slowness somewhere, the response to the
5009 original RCPT would be taken as a response to RSET and so on, causing
5010 mayhem of various kinds.
5012 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5013 when I implemented it. It didn't allow for the fact that some option values
5014 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5015 the right test for positive values.
5017 48. Domain names in DNS records are case-independent. Exim always looks them up
5018 in lower case. Some resolvers return domain names in exactly the case they
5019 appear in the zone file, that is, they may contain uppercase letters. Not
5020 all resolvers do this - some return always lower case. Exim was treating a
5021 change of case by a resolver as a change of domain, similar to a widening
5022 of a domain abbreviation. This triggered its re-routing code and so it was
5023 trying to route what was effectively the same domain again. This normally
5024 caused routing to fail (because the router wouldn't handle the domain
5025 twice). Now Exim checks for this case specially, and just changes the
5026 casing of the domain that it ultimately uses when it transmits the message
5029 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5032 50. If a filter generated a file delivery with a non-absolute name (possible if
5033 no home directory exists for the router), the forbid_file option was not
5036 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5037 the existing equality matching.
5039 52. Exim was using ints instead of ino_t variables in some places where it was
5040 dealing with inode numbers.
5042 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5043 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5044 called TMPDIR, and if it finds it is different, it changes its value.
5046 54. The smtp_printf() function is now made available to local_scan() so
5047 additional output lines can be written before returning. There is also an
5048 smtp_fflush() function to enable the detection of a dropped connection.
5049 The variables smtp_input and smtp_batched_input are exported to
5052 55. Changed the default runtime configuration: the message "Unknown user"
5053 has been removed from the ACL, and instead placed on the localuser router,
5054 using the cannot_route_message feature. This means that any verification
5055 failures that generate their own messages won't get overridden. Similarly,
5056 the "Unrouteable address" message that was in the ACL for unverifiable
5057 relay addresses has also been removed.
5059 56. Added hosts_avoid_esmtp to the smtp transport.
5061 57. The exicyclog script was not checking for the esoteric option
5062 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5063 will work only if exicyclog is run under the appropriate euid.
5065 58. Following a discussion on the list, the rules by which Exim recognises line
5066 endings on incoming messages have been changed. The -dropcr and drop_cr
5067 options are now no-ops, retained only for backwards compatibility. The
5068 following line terminators are recognized: LF CRLF CR. However, special
5069 processing applies to CR:
5071 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5072 nor a local message in the state where . is a terminator.
5074 (ii) If a bare CR is encountered in a header line, an extra space is added
5075 after the line terminator so as not to end the header. The reasoning
5076 behind this is that bare CRs in header lines are most likely either
5077 to be mistakes, or people trying to play silly games.
5079 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5080 was being incorrectly given as 18 bytes larger than it should have been.
5081 This is a VOB (very old bug).
5083 60. This may never have affected anything current, but just in case it has:
5084 When the local host is found other than at the start of a list of hosts,
5085 the local host, those with the same MX, and any that follow, are discarded.
5086 When the list in question was part of a longer list of hosts, the following
5087 hosts (not currently being processed) were also being discarded. This no
5088 longer happens. I'm not sure if this situation could ever has previously
5091 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5094 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5095 header. This is something that is recommended in a new Internet Draft, and
5096 is something that is documented as being done by Sendmail. There are two
5097 possible values. For messages generated by the autoreply transport, Exim
5100 Auto-Submitted: auto-replied
5102 whereas for all other generated messages (e.g. bounces) it adds
5104 Auto-Submitted: auto-generated
5106 63. The "personal" condition in filters now includes a test for the
5107 Auto-Submitted: header. If it contains the string "auto-" the message it
5108 not considered personal.
5110 64. Added rcpt_include_affixes as a generic transport option.
5112 65. Added queue_only_override (default true).
5114 66. Added the syslog_duplication option.
5116 67. If what should have been the first header line of a message consisted of
5117 a space followed by a colon, Exim was mis-interpreting it as a header line.
5118 It isn't of course - it is syntactically invalid and should therefore be
5119 treated as the start of the message body. The misbehaviour could have
5120 caused a number of strange effects, including loss of data in subsequent
5121 header lines, and spool format errors.
5123 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5124 client host had authenticated. This control can now be exercised by an ACL
5125 for more flexibility.
5127 69. By default, callouts do not happen when testing with -bh. There is now a
5128 variant, -bhc, which does actually run the callout code, including
5129 consulting and updating the callout cache.
5131 70. Added support for saslauthd authentication, courtesy of Alexander
5134 71. If statvfs() failed on the spool or log directories while checking their
5135 size for availability, Exim confusingly gave the error "space shortage".
5136 Furthermore, in debugging mode it crashed with a floating point exception.
5137 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5138 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5139 serious problem, Exim now writes to the main and panic logs when this
5140 happens, with details of the failure. It then refuses to accept the
5141 incoming message, giving the message "spool directory problem" or "log
5142 directory problem" with a 421 code for SMTP messages.
5144 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5145 0, 1, and 2 exist, because some OS complain for execs without them (see
5146 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5147 descriptors. However, the code omitted to check that the open succeeded,
5148 causing mysterious errors if for some reason the permissions on /dev/null
5149 got screwed. Now Exim writes a message to the main and panic logs, and
5150 bombs out if it can't open /dev/null.
5152 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5153 interact so that it is all more flexible. It is supposed to remain
5154 backwards compatible. Also added extra_local_interfaces.
5156 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5157 to bomb out with an assertion failure - to the client this appears as a
5158 connection drop. This problem occurs in the part of the code that was taken
5159 from the Samba project. Fortunately, the assertion is in a very simple
5160 function, so I have fixed this by reproducing the function inline in the
5161 one place where it is called, and arranging for authentication to fail
5162 instead of killing the process with assert().
5164 75. The SPA client code was not working when the server requested OEM rather
5165 than Unicode encoding.
5167 76. Added code to make require_files with a specific uid setting more usable in
5168 the case where statting the file as root fails - usually a non-root-mounted
5169 NFS file system. When this happens and the failure is EACCES, Exim now
5170 forks a subprocess and does the per-uid checking as the relevant uid.
5172 77. Added process_log_path.
5174 78. If log_file_path was not explicitly set, a setting of check_log_space or
5175 check_log_inodes was ignored.
5177 79. If a space check for the spool or log partitions fails, the incident is now
5178 logged. Of course, in the latter case the data may get lost...
5180 80. Added the %p formatting code to string_format() so that it can be used to
5181 print addresses in debug_print(). Adjusted all the address printing in the
5182 debugging in store.c to use %p rather than %d.
5184 81. There was a concern that a line of code in smtp_in.c could overflow a
5185 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5186 initially expressed, the concern was not well-founded, because trailing
5187 spaces are removed early. However, if the trailing spaces were followed by
5188 a NULL, they did not get removed, so the overflow was possible. Two fixes
5191 (a) I re-wrote the offending code in a cleaner fashion.
5192 (b) If an incoming SMTP command contains a NULL character, it is rejected
5195 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5196 runs initgroups(), so that if the Exim user is in any additional groups,
5197 they will be used during message reception.
5203 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob