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.
16 PP/01 Date: & Message-Id: revert to normally being appended to a message,
17 only prepend for the Resent-* case. Fixes regression introduced in
18 Exim 4.70 by NM/22 for Bugzilla 607.
20 PP/02 Include check_rfc2047_length in configure.default because we're seeing
21 increasing numbers of administrators be bitten by this.
23 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
25 PP/03 Bugzilla 994: added openssl_options main configuration option.
27 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
29 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
31 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
33 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
34 without a peer certificate, leading to a segfault because of an
35 assumption that peers always have certificates. Be a little more
36 paranoid. Problem reported by Martin Tscholak.
38 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
39 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
40 NB: ClamAV planning to remove STREAM in "middle of 2010".
41 CL also introduces -bmalware, various -d+acl logging additions and
42 more caution in buffer sizes.
44 PP/09 Implemented reverse_ip expansion operator.
46 PP/10 Bugzilla 937: provide a "debug" ACL control.
48 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
50 PP/12 Bugzilla 973: Implement --version.
52 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
54 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
56 PP/15 Bugzilla 816: support multiple condition rules on Routers.
58 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
59 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
60 ignore trailing whitespace.
62 JJ/02 prevent non-panic DKIM error from being sent to paniclog
64 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
67 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
68 Notification from Dr Andrew Aitchison.
70 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
71 ExtendedDetectionInfo response format.
72 Notification from John Horne.
74 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
77 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
78 XSL and documented dependency on system catalogs, with examples of how
81 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
84 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
85 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
86 configuration file which is writeable by the Exim user or group.
88 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
89 of configuration files to cover files specified with the -C option if
90 they are going to be used with root privileges, not just the default
93 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
94 option (effectively making it always true).
96 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
97 files to be used while preserving root privileges.
99 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
100 that rogue child processes cannot use them.
102 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
103 run-time user, instead of root.
105 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
106 Exim run-time user without dropping privileges.
108 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
109 result string, instead of calling string_vformat() twice with the same
112 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
113 for other users. Others should always drop root privileges if they use
114 -C on the command line, even for a whitelisted configure file.
116 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
118 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
124 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
125 $data_path, and $header_path variables; fixed documentation bugs and
128 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
129 exipick to access non-standard spools, including the "frozen" queue
132 NM/01 Bugzilla 965: Support mysql stored procedures.
133 Patch from Alain Williams
135 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
137 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
138 Patch from Andreas Metzler
140 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
141 Patch from Kirill Miazine
143 NM/05 Bugzilla 671: Added umask to procmail example.
145 JJ/03 installed exipick 20100323.0, fixing doc bug
147 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
148 directory. Notification and patch from Dan Rosenberg.
150 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
152 TK/02 Improve log output when DKIM signing operation fails.
154 MH/01 Treat the transport option dkim_domain as a colon separated
155 list, not as a single string, and sign the message with each element,
156 omitting multiple occurences of the same signer.
158 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
159 Bugzilla 985, 986. Patch by Simon Arlott
161 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
162 Patch by Simon Arlott
164 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
165 MBX locking. Notification from Dan Rosenberg.
171 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
173 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
175 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
177 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
179 NM/04 Bugzilla 915: Flag broken perl installation during build.
185 TK/01 Added patch by Johannes Berg that expands the main option
186 "spamd_address" if it starts with a dollar sign.
188 TK/02 Write list of recipients to X-Envelope-Sender header when building
189 the mbox-format spool file for content scanning (suggested by Jakob
192 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
193 (http://www.dcc-servers.net/) support via dccifd. Activated by
194 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
196 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
197 by Mark Daniel Reidel <mr@df.eu>.
199 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
200 When building exim an external PCRE library is now needed -
201 PCRE is a system library on the majority of modern systems.
202 See entry on PCRE_LIBS in EDITME file.
204 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
205 conversation. Added nologin parameter to request.
206 Patch contributed by Kirill Miazine.
208 TF/01 Do not log submission mode rewrites if they do not change the address.
210 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
212 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
213 log files in place. Contributed by Roberto Lima.
215 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
217 TF/03 Bugzilla 615: When checking the local_parts router precondition
218 after a local_part_suffix or local_part_prefix option, Exim now
219 does not use the address's named list lookup cache, since this
220 contains cached lookups for the whole local part.
222 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
223 Robert Millan. Documentation is in experimental-spec.txt.
225 TF/04 Bugzilla 668: Fix parallel build (make -j).
227 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
229 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
230 Patch provided by Jan Srzednicki.
232 TF/05 Leading white space used to be stripped from $spam_report which
233 wrecked the formatting. Now it is preserved.
235 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
236 that they are available at delivery time.
238 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
240 TF/08 TLS error reporting now respects the incoming_interface and
241 incoming_port log selectors.
243 TF/09 Produce a more useful error message if an SMTP transport's hosts
244 setting expands to an empty string.
246 NM/06 Bugzilla 744: EXPN did not work under TLS.
247 Patch provided by Phil Pennock.
249 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
250 Patch provided by Richard Godbee.
252 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
253 acl_smtp_notquit, added index entry.
255 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
256 Patch provided by Eugene Bujak.
258 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
259 accept(). Patch provided by Maxim Dounin.
261 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
262 Patch provided by Phil Pennock.
264 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
266 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
267 Patch provided by Brad "anomie" Jorsch.
269 NM/14 Bugzilla 622: Added timeout setting to transport filter.
270 Patch provided by Dean Brooks.
272 TK/05 Add native DKIM support (does not depend on external libraries).
274 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
275 Patch provided by Graeme Fowler.
277 NM/16 Bugzilla 851: Documentation example syntax fix.
279 NM/17 Changed NOTICE file to remove references to embedded PCRE.
281 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
284 NM/19 Bugzilla 745: TLS version reporting.
285 Patch provided by Phil Pennock.
287 NM/20 Bugzilla 167: bool: condition support.
288 Patch provided by Phil Pennock.
290 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
291 clients. Patch provided by Phil Pennock.
293 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
294 Patch provided by Brad "anomie" Jorsch.
296 NM/23 Bugzilla 687: Fix misparses in eximstats.
297 Patch provided by Heiko Schlittermann.
299 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
300 Patch provided by Heiko Schlittermann.
302 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
303 plus update to original patch.
305 NM/26 Bugzilla 799: Documentation correction for ratelimit.
307 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
308 Patch provided by David Brownlee.
310 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
312 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
314 NM/30 Bugzilla 888: TLS documentation bugfixes.
316 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
318 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
319 Unlike the original bugzilla I have changed all shell scripts in src tree.
321 NM/33 Bugzilla 898: Transport filter timeout fix.
322 Patch by Todd Rinaldo.
324 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
325 Patch by Serge Demonchaux.
327 NM/35 Bugzilla 39: Base64 decode bug fixes.
328 Patch by Jakob Hirsch.
330 NM/36 Bugzilla 909: Correct connect() call in dcc code.
332 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
334 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
336 NM/39 Bugzilla 911: Fixed MakeLinks build script.
342 TK/01 Add preliminary DKIM support. Currently requires a forked version of
343 ALT-N's libdkim that I have put here:
344 http://duncanthrax.net/exim-experimental/
346 Note to Michael Haardt: I had to rename some vars in sieve.c. They
347 were called 'true' and it seems that C99 defines that as a reserved
348 keyword to be used with 'bool' variable types. That means you could
349 not include C99-style headers which use bools without triggering
350 build errors in sieve.c.
352 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
353 as mailq or other aliases. Changed the --help handling significantly
354 to do whats expected. exim_usage() emits usage/help information.
356 SC/01 Added the -bylocaldomain option to eximstats.
358 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
360 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
362 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
368 PH/01 Another patch from the Sieve maintainer.
370 PH/02 When an IPv6 address is converted to a string for single-key lookup
371 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
372 dots are used instead of colons so that keys in lsearch files need not
373 contain colons. This was done some time before quoting was made available
374 in lsearch files. However, iplsearch files do require colons in IPv6 keys
375 (notated using the quote facility) so as to distinguish them from IPv4
376 keys. This meant that lookups for IP addresses in host lists did not work
377 for iplsearch lookups.
379 This has been fixed by arranging for IPv6 addresses to be expressed with
380 colons if the lookup type is iplsearch. This is not incompatible, because
381 previously such lookups could never work.
383 The situation is now rather anomolous, since one *can* have colons in
384 ordinary lsearch keys. However, making the change in all cases is
385 incompatible and would probably break a number of configurations.
387 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
390 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
391 conversion specification without a maximum field width, thereby enabling
392 a rogue spamd server to cause a buffer overflow. While nobody in their
393 right mind would setup Exim to query an untrusted spamd server, an
394 attacker that gains access to a server running spamd could potentially
395 exploit this vulnerability to run arbitrary code as the Exim user.
397 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
398 $primary_hostname instead of what libspf2 thinks the hosts name is.
400 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
401 a directory entry by the name of the lookup key. Previously, if a
402 symlink pointed to a non-existing file or a file in a directory that
403 Exim lacked permissions to read, a lookup for a key matching that
404 symlink would fail. Now it is enough that a matching directory entry
405 exists, symlink or not. (Bugzilla 503.)
407 PH/03 The body_linecount and body_zerocount variables are now exported in the
410 PH/04 Added the $dnslist_matched variable.
412 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
413 This means they are set thereafter only if the connection becomes
416 PH/06 Added the client_condition to authenticators so that some can be skipped
417 by clients under certain conditions.
419 PH/07 The error message for a badly-placed control=no_multiline_responses left
420 "_responses" off the end of the name.
422 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
424 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
425 (without spaces) instead of just copying the configuration text.
427 PH/10 Added the /noupdate option to the ratelimit ACL condition.
429 PH/11 Added $max_received_linelength.
431 PH/12 Added +ignore_defer and +include_defer to host lists.
433 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
434 way in which PCRE > 7.0 is built.
436 PH/14 Implemented queue_only_load_latch.
438 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
439 MAIL command. The effect was to mangle the value on 64-bit systems.
441 PH/16 Another patch from the Sieve maintainer.
443 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
445 PH/18 If a system quota error occurred while trying to create the file for
446 a maildir delivery, the message "Mailbox is full" was not appended to the
447 bounce if the delivery eventually timed out. Change 4.67/27 below applied
448 only to a quota excession during the actual writing of the file.
450 PH/19 It seems that peer DN values may contain newlines (and other non-printing
451 characters?) which causes problems in log lines. The DN values are now
452 passed through string_printing() before being added to log lines.
454 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
455 and InterBase are left for another time.)
457 PH/21 Added message_body_newlines option.
459 PH/22 Guard against possible overflow in moan_check_errorcopy().
461 PH/23 POSIX allows open() to be a macro; guard against that.
463 PH/24 If the recipient of an error message contained an @ in the local part
464 (suitably quoted, of course), incorrect values were put in $domain and
465 $local_part during the evaluation of errors_copy.
471 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
472 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
475 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
476 issue a MAIL command.
478 PH/02 In an ACL statement such as
480 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
482 if a client was not listed at all, or was listed with a value other than
483 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
484 the condition was not true (as it should be), so access was not denied.
485 The bug was that the ! inversion was incorrectly passed on to the second
486 item. This has been fixed.
488 PH/03 Added additional dnslists conditions == and =& which are different from
489 = and & when the dns lookup returns more than one IP address.
491 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
492 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
494 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
495 FSYNC, which compiles an option called disable_fsync that allows for
496 bypassing fsync(). The documentation is heavily laced with warnings.
498 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
500 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
501 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
502 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
503 including adding "make clean"; (3) Added -fPIC when compiling the test
504 dynamically loaded module, to get rid of a warning.
506 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
507 message fails, move_frozen_messages = true and ignore_bounce_errors_after
508 = 0s. The bug is otherwise harmless.
510 PH/07 There was a bug in the dovecot authenticator such that the value of
511 $auth1 could be overwritten, and so not correctly preserved, after a
512 successful authentication. This usually meant that the value preserved by
513 the server_setid option was incorrect.
515 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
517 PH/09 Installed PCRE release 7.0.
519 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
520 run for batched SMTP input. It is now run at the start of every message
521 in the batch. While fixing this I discovered that the process information
522 (output by running exiwhat) was not always getting set for -bs and -bS
523 input. This is fixed, and it now also says "batched" for BSMTP.
525 PH/11 Added control=no_pipelining.
527 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
528 patch, slightly modified), and move the expansion of helo_data till after
529 the connection is made in the smtp transport (so it can use these
532 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
534 PH/14 Added log_selector = +pid.
536 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
538 PH/16 Add ${if forany and ${if forall.
540 PH/17 Added dsn_from option to vary the From: line in DSNs.
542 PH/18 Flush SMTP output before performing a callout, unless control =
543 no_callout_flush is set.
545 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
546 was true (the default) a successful delivery failed to delete the retry
547 item, thus causing premature timeout of the address. The bug is now
550 PH/20 Added hosts_avoid_pipelining to the smtp transport.
552 PH/21 Long custom messages for fakedefer and fakereject are now split up
553 into multiline reponses in the same way that messages for "deny" and
554 other ACL rejections are.
556 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
557 with slight modification.
559 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
560 draft, changing the syntax and factoring some duplicate code".
562 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
563 for deliveries of the second and subsequent messages over the same SMTP
566 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
567 ${reduce, with only minor "tidies".
569 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
571 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
572 expansion side effects.
574 PH/27 When a message times out after an over-quota error from an Exim-imposed
575 quota, the bounce message says "mailbox is full". This message was not
576 being given when it was a system quota that was exceeded. It now should
579 MH/03 Made $recipients available in local_scan(). local_scan() already has
580 better access to the recipient list through recipients_list[], but
581 $recipients can be useful in postmaster-provided expansion strings.
583 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
584 in the case of a MAIL command with additional options following the
585 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
586 were accidentally chopped off.
588 PH/29 SMTP synchronization checks are implemented when a command is read -
589 there is a check that no more input is waiting when there shouldn't be
590 any. However, for some commands, a delay in an ACL can mean that it is
591 some time before the response is written. In this time, more input might
592 arrive, invalidly. So now there are extra checks after an ACL has run for
593 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
594 pipelining has not been advertised.
596 PH/30 MH's patch to allow iscntrl() characters to be list separators.
598 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
599 returned in the SMTP response when smtp_return_error_details was false.
602 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
603 instead of the C I/O that was originally supplied, because problems were
606 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
607 Exim which did not show up earlier: it was assuming that a call to
608 SSL_CTX_set_info_callback() might give an error value. In fact, there is
609 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
610 was a macro that became an assignment, so it seemed to work. This has
611 changed to a proper function call with a void return, hence the compile
612 error. Exim's code has been fixed.
614 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
617 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
619 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
621 PH/37 If a message is not accepted after it has had an id assigned (e.g.
622 because it turns out to be too big or there is a timeout) there is no
623 "Completed" line in the log. When some messages of this type were
624 selected by exigrep, they were listed as "not completed". Others were
625 picked up by some special patterns. I have improved the selection
626 criteria to be more general.
628 PH/38 The host_find_failed option in the manualroute router can now be set
629 to "ignore", to completely ignore a host whose IP address cannot be
630 found. If all hosts are ignored, the behaviour is controlled by the new
631 host_all_ignored option.
633 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
634 homing or because of multiple MX records with /mx) generated more than
635 one IP address, and the following item turned out to be the local host,
636 all the secondary addresses of the first item were incorrectly removed
637 from the list, along with the local host and any following hosts (which
638 is what is supposed to happen).
640 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
641 whoever called Exim into the -H file. In the case of the daemon it was
642 behaving confusingly. When first started, it used values for whoever
643 started the daemon, but after a SIGHUP it used the Exim user (because it
644 calls itself on a restart). I have changed the code so that it now always
647 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
648 message are rejected with the same error (e.g. no authentication or bad
649 sender address), and a DATA command is nevertheless sent (as can happen
650 with PIPELINING or a stupid MUA), the error message that was given to the
651 RCPT commands is included in the rejection of the DATA command. This is
652 intended to be helpful for MUAs that show only the final error to their
655 PH/42 Another patch from the Sieve maintainer.
657 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
658 Eximstats - Fixed some broken HTML links and added missing column headers
660 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
661 columns for Rejects, Temp Rejects, Ham, and Spam rows.
663 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
665 PH/43 Yet another patch from the Sieve maintainer.
667 PH/44 I found a way to check for a TCP/IP connection going away before sending
668 the response to the final '.' that terminates a message, but only in the
669 case where the client has not sent further data following the '.'
670 (unfortunately, this is allowed). However, in many cases there won't be
671 any further data because there won't be any more messages to send. A call
672 to select() can be used: if it shows that the input is "ready", there is
673 either input waiting, or the socket has been closed. An attempt to read
674 the next input character can distinguish the two cases. Previously, Exim
675 would have sent an OK response which the client would never have see.
676 This could lead to message repetition. This fix should cure that, at
677 least in a lot of common cases.
679 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
680 advertised in response to EHLO.
686 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
687 fixed by 4.65/MH/01 (is this a record?) are fixed:
689 (i) An empty string was always treated as zero by the numeric comparison
690 operators. This behaviour has been restored.
692 (ii) It is documented that the numeric comparison operators always treat
693 their arguments as decimal numbers. This was broken in that numbers
694 starting with 0 were being interpreted as octal.
696 While fixing these problems I realized that there was another issue that
697 hadn't been noticed. Values of message_size_limit (both the global option
698 and the transport option) were treated as octal if they started with 0.
699 The documentation was vague. These values are now always treated as
700 decimal, and I will make that clear in the documentation.
706 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
707 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
710 MH/01 Don't check that the operands of numeric comparison operators are
711 integers when their expansion is in "skipping" mode (fixes bug
712 introduced by 4.64-PH/07).
714 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
715 child addresses, Exim now panics and dies. Previously, because the count
716 is held in a short int, deliveries were likely to be lost. As such a
717 large number of recipients for a single message is ridiculous
718 (performance will be very, very poor), I have chosen to impose a limit
719 rather than extend the field.
725 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
726 leftover -K file (the existence of which was triggered by #402).
727 While we were at it, introduced process PID as part of the -K
728 filename. This should rule out race conditions when creating
731 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
732 processing considerably. Previous code took too long for large mails,
733 triggering a timeout which in turn triggers #401.
735 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
736 in the DK code in transports.c. sendfile() is not really portable,
737 hence the _LINUX specificness.
739 TF/01 In the add_headers option to the mail command in an Exim filter,
740 there was a bug that Exim would claim a syntax error in any
741 header after the first one which had an odd number of characters
744 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
745 callout verification, Exim cached a "reject" for the entire domain. This
746 is correct for most verifications, but it is not correct for a recipient
747 verification with use_sender or use_postmaster set, because in that case
748 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
749 case of MAIL FROM:<> rejection from other early rejections (e.g.
750 rejection of HELO). When verifying a recipient using a non-null MAIL
751 address, the cache is ignored if it shows MAIL FROM:<> rejection.
752 Whatever the result of the callout, the value of the domain cache is
753 left unchanged (for any other kind of callout, getting as far as trying
754 RCPT means that the domain itself is ok).
756 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
759 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
760 manifest itself as EPIPE rather than ECONNECT. When tidying away a
761 session, the daemon ignores ECONNECT errors and logs others; it now
762 ignores EPIPE as well.
764 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
765 (quoted-printable decoding).
767 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
768 later the small subsequent patch to fix an introduced bug.
770 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
772 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
774 PH/08 An error is now given if message_size_limit is specified negative.
776 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
777 to be given (somewhat) arbitrary names.
779 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
782 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
783 miscellaneous code fixes
785 PH/10 Added the log_reject_target ACL modifier to specify where to log
788 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
789 hostname. This is wrong, because it relates to the incoming message (and
790 probably the interface on which it is arriving) and not to the outgoing
791 callout (which could be using a different interface). This has been
792 changed to use the value of the helo_data option from the smtp transport
793 instead - this is what is used when a message is actually being sent. If
794 there is no remote transport (possible with a router that sets up host
795 addresses), $smtp_active_hostname is used.
797 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
798 tweaks were necessary in order to get it to work (see also 21 below):
799 (a) The code assumed that strncpy() returns a negative number on buffer
800 overflow, which isn't the case. Replaced with Exim's string_format()
802 (b) There were several signed/unsigned issues. I just did the minimum
803 hacking in of casts. There is scope for a larger refactoring.
804 (c) The code used strcasecmp() which is not a standard C function.
805 Replaced with Exim's strcmpic() function.
806 (d) The code set only $1; it now sets $auth1 as well.
807 (e) A simple test gave the error "authentication client didn't specify
808 service in request". It would seem that Dovecot has changed its
809 interface. Fortunately there's a specification; I followed it and
810 changed what the client sends and it appears to be working now.
812 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
815 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
816 address A is aliased to B and C, where B exists and C does not. Without
817 -v the output is "A verified" because verification stops after a
818 successful redirection if more than one address is generated. However,
819 with -v the child addresses are also verified. Exim was outputting "A
820 failed to verify" and then showing the successful verification for C,
821 with its parentage. It now outputs "B failed to verify", showing B's
822 parentage before showing the successful verification of C.
824 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
825 look up a TXT record in a specific list after matching in a combined
828 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
829 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
830 they consult the DNS. I had assumed they would set it the way they
831 wanted; and indeed my experiments on Linux seem to show that in some
832 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
833 To be on the safe side, however, I have now made the interface to
834 host_find_byname() similar to host_find_bydns(), with an argument
835 containing the DNS resolver options. The host_find_byname() function now
836 sets these options at its start, just as host_find_bydns() does. The smtp
837 transport options dns_qualify_single and dns_search_parents are passed to
838 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
839 of host_find_byname() use the default settings of RES_DEFNAMES
840 (qualify_single) but not RES_DNSRCH (search_parents).
842 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
843 spool_read_header() do less string testing, by means of a preliminary
844 switch on the second character of optional "-foo" lines. (This is
845 overdue, caused by the large number of possibilities that now exist.
846 Originally there were few.) While I was there, I also converted the
847 str(n)cmp tests so they don't re-test the leading "-" and the first
848 character, in the hope this might squeeze out yet more improvement.
850 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
851 flag allowing group syntax was set by the header_syntax check but not
852 turned off, possible causing trouble later; (2) The flag was not being
853 set at all for the header_verify test, causing "group"-style headers to
854 be rejected. I have now set it in this case, and also caused header_
855 verify to ignore an empty address taken from a group. While doing this, I
856 came across some other cases where the code for allowing group syntax
857 while scanning a header line wasn't quite right (mostly, not resetting
858 the flag correctly in the right place). These bugs could have caused
859 trouble for malformed header lines. I hope it is now all correct.
861 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
862 with the "reply" argument non-NULL. The code, however (which originally
863 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
864 but it didn't always do it. This confused somebody who was copying the
865 code for some other use. I have removed all the tests.
867 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
868 feature that was used to support insecure browsers during the U.S. crypto
869 embargo. It requires special client support, and Exim is probably the
870 only MTA that supported it -- and would never use it because real RSA is
871 always available. This code has been removed, because it had the bad
872 effect of slowing Exim down by computing (never used) parameters for the
873 RSA_EXPORT functionality.
875 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
876 authenticator to fail if there's a tab character in the incoming data
877 (there should never be unless someone is messing about, as it's supposed
878 to be base64-encoded). Also added, on Timo's advice, the "secured" option
879 if the connection is using TLS or if the remote IP is the same as the
880 local IP, and the "valid-client-cert option" if a client certificate has
883 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
884 authenticators. This can be used for authorization after authentication
885 succeeds. (In the case of plaintext, it servers for both authentication
888 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
889 if any retry times were supplied.
891 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
892 connection, where there is no client IP address to check. In this
893 situation, the verify now always succeeds.
895 PH/25 Applied John Jetmore's -Mset patch.
897 PH/26 Added -bem to be like -Mset, but loading a message from a file.
899 PH/27 In a string expansion for a processed (not raw) header when multiple
900 headers of the same name were present, leading whitespace was being
901 removed from all of them, but trailing whitespace was being removed only
902 from the last one. Now trailing whitespace is removed from each header
903 before concatenation. Completely empty headers in a concatenation (as
906 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
907 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
909 PH/29 [Removed. This was a change that I later backed out, and forgot to
910 correct the ChangeLog entry (that I had efficiently created) before
911 committing the later change.]
913 PH/30 Exim was sometimes attempting to deliver messages that had suffered
914 address errors (4xx response to RCPT) over the same connection as other
915 messages routed to the same hosts. Such deliveries are always "forced",
916 so retry times are not inspected. This resulted in far too many retries
917 for the affected addresses. The effect occurred only when there were more
918 hosts than the hosts_max_try setting in the smtp transport when it had
919 the 4xx errors. Those hosts that it had tried were not added to the list
920 of hosts for which the message was waiting, so if all were tried, there
921 was no problem. Two fixes have been applied:
923 (i) If there are any address or message errors in an SMTP delivery, none
924 of the hosts (tried or untried) are now added to the list of hosts
925 for which the message is waiting, so the message should not be a
926 candidate for sending over the same connection that was used for a
927 successful delivery of some other message. This seems entirely
928 reasonable: after all the message is NOT "waiting for some host".
929 This is so "obvious" that I'm not sure why it wasn't done
930 previously. Hope I haven't missed anything, but it can't do any
931 harm, as the worst effect is to miss an optimization.
933 (ii) If, despite (i), such a delivery is accidentally attempted, the
934 routing retry time is respected, so at least it doesn't keep
935 hammering the server.
937 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
938 in ${readsocket because some servers need this prod.
940 PH/32 Added some extra debug output when updating a wait-xxx database.
942 PH/33 The hint "could be header name not terminated by colon", which has been
943 given for certain expansion errors for a long time, was not being given
944 for the ${if def:h_colon_omitted{... case.
946 PH/34 The spec says: "With one important exception, whenever a domain list is
947 being scanned, $domain contains the subject domain." There was at least
948 one case where this was not true.
950 PH/35 The error "getsockname() failed: connection reset by peer" was being
951 written to the panic log as well as the main log, but it isn't really
952 panic-worthy as it just means the connection died rather early on. I have
953 removed the panic log writing for the ECONNRESET error when getsockname()
956 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
957 runs only) independently of the message's sender address. This meant
958 that, if the 4xx error was in fact related to the sender, a different
959 message to the same recipient with a different sender could confuse
960 things. In particualar, this can happen when sending to a greylisting
961 server, but other circumstances could also provoke similar problems.
962 I have changed the default so that the retry time for these errors is now
963 based a combination of the sender and recipient addresses. This change
964 can be overridden by setting address_retry_include_sender=false in the
967 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
968 remote server are returned as part of bounce messages. This was not
969 happening for LMTP over a pipe (the lmtp transport), but now it is the
970 same for both kinds of LMTP.
972 PH/38 Despite being documented as not happening, Exim was rewriting addresses
973 in header lines that were in fact CNAMEs. This is no longer the case.
975 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
976 and queue runs started by the daemon processed all messages. This has
977 been fixed so that -R and -S can now usefully be given with -q<time>.
979 PH/40 Import PCRE release 6.7 (fixes some bugs).
981 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
983 PH/42 Give an error if -q is specified more than once.
985 PH/43 Renamed the variables $interface_address and $interface_port as
986 $received_ip_address and $received_port, to make it clear that these
987 values apply to message reception, and not to the outgoing interface when
988 a message is delivered. (The old names remain recognized, of course.)
990 PH/44 There was no timeout on the connect() call when using a Unix domain
991 socket in the ${readsocket expansion. There now is.
993 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
994 be meaningful with "accept".
996 SC/01 Eximstats V1.43
997 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
999 SC/02 Eximstats V1.44
1000 Use a glob alias rather than an array ref in the generated
1001 parser. This improves both readability and performance.
1003 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1004 Collect SpamAssassin and rejection statistics.
1005 Don't display local sender or destination tables unless
1006 there is data to show.
1007 Added average volumes into the top table text output.
1009 SC/04 Eximstats V1.46
1010 Collect data on the number of addresses (recipients)
1011 as well as the number of messages.
1013 SC/05 Eximstats V1.47
1014 Added 'Message too big' to the list of mail rejection
1015 reasons (thanks to Marco Gaiarin).
1017 SC/06 Eximstats V1.48
1018 Mainlog lines which have GMT offsets and are too short to
1019 have a flag are now skipped.
1021 SC/07 Eximstats V1.49 (Alain Williams)
1022 Added the -emptyok flag.
1024 SC/08 Eximstats V1.50
1025 Fixes for obtaining the IP address from reject messages.
1027 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1028 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1029 whitesspace changes from 4.64-PH/27
1031 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1034 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1035 are found, allow negative numbers in numeric criteria)
1037 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1039 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1040 to match changes made in 4.64-PH/43
1042 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1044 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1045 "domain" is actually an IP address, and force a failure. This locks out
1046 those revolvers/nameservers that support "A-for-A" lookups, in
1047 contravention of the specifications.
1049 PH/48 When a host name was looked up from an IP address, and the subsequent
1050 forward lookup of the name timed out, the host name was left in
1051 $sender_host_name, contrary to the specification.
1053 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1054 restricted to single-key lookups, Exim was not diagnosing an error if
1055 * or *@ was used with a query-style lookup.
1057 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1059 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1060 long ago, but noone interested enough thought of it. Let's just say that
1061 the "1.1" means that there are some new functions that weren't there at
1062 some point in the past.
1064 PH/51 Error processing for expansion failure of helo_data from an smtp
1065 transport during callout processing was broken.
1067 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1068 tested/used via the -bh/-bhc/-bs options.
1070 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1071 bug, fixed in subsequent PCRE releases).
1073 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1074 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1076 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1082 SC/01 Use a glob alias rather than an array ref in eximstats generated
1083 parser. This improves both readability and performance.
1085 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1086 Don't display local sender or destination tables in eximstats unless
1087 there is data to show.
1088 Added average volumes into the eximstats top table text output.
1090 SC/03 Collect data on the number of addresses (recipients) as well
1091 as the number of messages in eximstats.
1093 TF/01 Correct an error in the documentation for the redirect router. Exim
1094 does (usually) call initgroups() when daemonizing.
1096 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1097 with consistent privilege compared to when running as a daemon.
1099 TF/03 Note in the spec that $authenticated_id is not set for local
1100 submissions from trusted users.
1102 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1103 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1105 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1106 by adding some example configuration directives to the default
1107 configuration file. A little bit of work is required to uncomment the
1108 directives and define how usernames and passwords are checked, but
1109 there is now a framework to start from.
1111 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1112 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1113 without this. I don't know how relevant this is to other LDAP libraries.
1115 PH/02 Add the verb name to the "unknown ACL verb" error.
1117 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1119 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1121 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1122 directory not expanded when it should be if an expanded home directory
1123 was set for the address (which is overridden by the transport).
1125 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1128 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1129 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1130 because it is too late at that time, and has no effect.
1132 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1133 security issue with \' (bugzilla #107). I could not use the
1134 PQescapeStringConn() function, because it needs a PGconn value as one of
1137 PH/08 When testing addresses using -bt, indicate those final addresses that
1138 are duplicates that would not cause an additional delivery. At least one
1139 person was confused, thinking that -bt output corresponded to deliveries.
1140 (Suppressing duplicates isn't a good idea as you lose the information
1141 about possibly different redirections that led to the duplicates.)
1143 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1144 systems where poll() doesn't work, in particular OS X.
1146 PH/10 Added more information to debugging output for retry time not reached.
1148 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1149 operations in malware.c.
1151 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1154 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1155 syslog_duplication set false, log lines that would normally be written
1156 both the the main log and to the reject log were not written to syslog at
1159 PH/14 In the default configuration, change the use of "message" in ACL warn
1160 statements to "add_header".
1162 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1163 not followed by a command (e.g. "seen endif").
1165 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1166 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1169 PH/17 Added extra conditions to the default value of delay_warning_condition
1173 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1174 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1175 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1178 The Auto-Submitted: and various List- headers are standardised, whereas I
1179 don't think Precedence: ever was.
1181 PH/18 Refactored debugging code in route_finduser() to show more information,
1182 in particular, the error code if getpwnam() issues one.
1184 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1185 This is apparently needed in addition to the PH/07 change above to avoid
1186 any possible encoding problems.
1188 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1189 but not after initializing Perl.
1191 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1192 output them only if debugging. By default they are written stderr,
1193 apparently, which is not desirable.
1195 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1198 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1201 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1203 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1204 authenticated or an ident call has been made. Suppress the default
1205 values for $authenticated_id and $authenticated_sender (but permit -oMai
1206 and -oMas) when testing with -bh.
1208 PH/24 Re-jigged the order of the tests in the default configuration so that the
1209 tests for valid domains and recipients precede the DNS black list and CSA
1210 tests, on the grounds that those ones are more expensive.
1212 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1213 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1214 This bug exists in every version of Exim that I still have, right back to
1217 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1218 However, an attempt to turn on case-sensitivity in a regex key by
1219 including (?-i) didn't work because the subject string was already
1220 lowercased, and the effects were non-intuitive. It turns out that a
1221 one-line patch can be used to allow (?-i) to work as expected.
1227 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1228 other effects) broke the use of negated acl sub-conditions.
1230 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1233 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1234 "Deny" causes Exim to reject the incoming connection with a 554 error.
1235 Unfortunately, if there is a major crisis, such as a disk failure,
1236 tcp-wrappers gives "deny", whereas what one would like would be some
1237 kind of temporary error. A kludge has been added to help with this.
1238 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1239 554 error is used if errno is still zero or contains ENOENT (which occurs
1240 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1243 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1245 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1246 errors. Otherwise a message that provokes a temporary error (when other
1247 messages do not) can cause a whole host to time out.
1249 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1250 addresses were routed directly to files or pipes from a redirect router.
1251 File deliveries just didn't batch; pipe deliveries might have suffered
1254 PH/06 A failure to get a lock for a hints database would erroneously always say
1255 "Failed to get write lock", even when it was really a read lock.
1257 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1258 of 0600. This has been changed to use the value of the lockfile_mode
1259 option (which defaults to 0600).
1261 PH/08 Applied small patch from the Sieve maintainer.
1263 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1264 folder from quota calculations, a direct delivery into this folder messed
1265 up the contents of the maildirsize file. This was because the regex was
1266 used only to exclude .Trash (or whatever) when the size of the mailbox
1267 was calculated. There was no check that a delivery was happening into an
1268 excluded directory. This bug has been fixed by ignoring all quota
1269 processing for deliveries into excluded directories.
1271 PH/10 Added the maildirfolder_create_regex option to appendfile.
1277 PH/01 The code for finding all the local interface addresses on a FreeBSD
1278 system running IPv6 was broken. This may well have applied to all BSD
1279 systems, as well as to others that have similar system calls. The broken
1280 code found IPv4 interfaces correctly, but gave incorrect values for the
1281 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1282 that it would not match correctly against @[] and not recognize the IPv6
1285 PH/02 The ipliteral router was not recognizing addresses of the form user@
1286 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1288 PH/03 Added disable_ipv6.
1290 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1291 decoded form, because it is most often used to construct To: headers
1292 lines in autoreplies, and the decoded form may well be syntactically
1293 invalid. However, $reply_address has leading white space removed, and all
1294 newlines turned into spaces so that the autoreply transport does not
1297 PH/05 If group was specified without a user on a router, and no group or user
1298 was specified on a transport, the group from the router was ignored.
1300 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1301 for visible compile-time settings that can be used to change these
1302 numbers, for those that want even more. Backwards compatibility with old
1303 spool files has been maintained. However, going back to a previous Exim
1304 release will lost any variables that are in spool files.
1306 PH/07 Two small changes when running in the test harness: increase delay when
1307 passing a TCP/IP connection to a new process, in case the original
1308 process has to generate a bounce, and remove special handling of
1309 127.0.0.2 (sic), which is no longer necessary.
1311 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1312 be the same on different OS.
1314 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1317 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1318 whether --show-vars was specified or not
1320 JJ/02 exipick: Added support for new ACL variable spool format introduced
1323 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1324 syntactically invalid From: or Reply-to: line, and a filter used this to
1325 generate an autoreply, and therefore failed to obtain an address for the
1326 autoreply, Exim could try to deliver to a non-existent relative file
1327 name, causing unrelated and misleading errors. What now happens is that
1328 it logs this as a hard delivery error, but does not attempt to create a
1331 PH/11 The exinext utility has a -C option for testing purposes, but although
1332 the given file was scanned by exinext itself; it wasn't being passed on
1333 when Exim was called.
1335 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1336 an end-of-file indication when reading a command response.
1338 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1339 compiled. In many other places in Exim, IPv6 addresses are always
1340 recognized, so I have changed this. It also means that IPv4 domain
1341 literals of the form [IPV4:n.n.n.n] are now always recognized.
1343 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1344 used if the router is not running as root, for example, when verifying at
1345 ACL time, or when using -bh. The debugging output from this situation was
1346 non-existent - all you got was a failure to exec. I have made two
1349 (a) Failures to set uid/gid, the current directory, or a process leader
1350 in a subprocess such as that created by queryprogram now generate
1351 suitable debugging ouput when -d is set.
1353 (b) The queryprogram router detects when it is not running as root,
1354 outputs suitable debugging information if -d is set, and then runs
1355 the subprocess without attempting to change uid/gid.
1357 PH/15 Minor change to Makefile for building test_host (undocumented testing
1360 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1361 additional section of a DNS packet that returns MX or SRV records.
1362 Instead, it always explicitly searches for A/AAAA records. This avoids
1363 major problems that occur when a DNS server includes only records of one
1364 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1365 fixed another bug: if SRV records were looked up and the corresponding
1366 address records were *not* found in the additional section, the port
1367 values from the SRV records were lost.
1369 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1370 using the correct key (the original address) when searching the retry
1371 rules in order to find which one to use for generating the retry hint.
1373 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1374 adding the default one. Similarly, if it contains a Reply-To: header, the
1375 errors_reply_to option, if set, is not used.
1377 PH/19 When calculating a retry time, Exim used to measure the "time since
1378 failure" by looking at the "first failed" field in the retry record. Now
1379 it does not use this if it is later than than the arrival time of the
1380 message. Instead it uses the arrival time. This makes for better
1381 behaviour in cases where some deliveries succeed, thus re-setting the
1382 "first failed" field. An example is a quota failure for a huge message
1383 when small messages continue to be delivered. Without this change, the
1384 "time since failure" will always be short, possible causing more frequent
1385 delivery attempts for the huge message than are intended.
1386 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1388 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1389 $1, $2, $3) because the numerical variables can be reset during some
1390 expansion items (e.g. "match"), thereby losing the authentication data.
1392 PH/21 Make -bV show the size of off_t variables so that the test suite can
1393 decide whether to run tests for quotas > 2G.
1395 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1396 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1397 filecount value is greater than 2G or if a quota value is greater than 2G
1398 on a system where the size of off_t is not greater than 4, a panic error
1401 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1402 never match. The debug and -bh output now contains an explicit error
1403 message indicating a malformed IPv4 address or mask.
1405 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1406 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1407 PH/23 above applies.
1409 PH/25 Do not write to syslog when running in the test harness. The only
1410 occasion when this arises is a failure to open the main or panic logs
1411 (for which there is an explicit test).
1413 PH/26 Added the /no_tell option to "control=freeze".
1415 PH/27 If a host name lookup failed very early in a connection, for example, if
1416 the IP address matched host_lookup and the reverse lookup yielded a name
1417 that did not have a forward lookup, an error message of the form "no IP
1418 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1419 could be logged. Now it outputs the IP address instead of "NULL".
1421 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1422 allows the sender and the authenticated sender to be set when
1423 submitting a message from within Exim. Since child_open_exim() is
1424 documented for local_scan(), the new function should be too.
1426 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1427 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1428 results in an empty string is now treated as unset.
1430 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1432 PH/31 Added sender_verify_fail logging option.
1434 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1435 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1436 tidied the source and removed it altogether.
1438 PH/33 When a queue run was abandoned because the load average was too high, a
1439 log line was always written; now it is written only if the queue_run log
1440 selector is set. In addition, the log line for abandonment now contains
1441 information about the queue run such as the pid. This is always present
1442 in "start" and "stop" lines but was omitted from the "abandon" line.
1444 PH/34 Omit spaces between a header name and the colon in the error message that
1445 is given when verify = headers_syntax fails (if there are lots of them,
1446 the message gets confusing).
1448 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1449 names, as there are now some PTR records that contain slashes. This check
1450 is only to protect against broken name servers that fall over on strange
1451 characters, so the fact that it applies to all lookups doesn't matter.
1453 PH/36 Now that the new test suite is complete, we can remove some of the
1454 special code in Exim that was needed for the old test suite. For example,
1455 sorting DNS records because real resolvers return them in an arbitrary
1456 order. The new test suite's fake resolver always returns records in the
1459 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1460 bounces) except when queue_only is set, to avoid logging races between
1461 the different processes.
1463 PH/38 Panic-die if .include specifies a non-absolute path.
1465 PH/39 A tweak to the "H" retry rule from its user.
1467 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1468 a label. They prevented compilation on older perls.
1470 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1471 a warning to be raised on newish perls.
1473 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1474 on queue. Changes to match documented behaviour of showing count of
1475 messages matching specified criteria.
1477 PH/40 Changed the default ident timeout from 30s to 5s.
1479 PH/41 Added support for the use of login_cap features, on those BSD systems
1480 that have them, for controlling the resources used by pipe deliveries.
1482 PH/42 The content-scanning code uses fopen() to create files in which to put
1483 message data. Previously it was not paying any attention to the mode of
1484 the files. Exim runs with umask(0) because the rest of the code creates
1485 files with open(), and sets the required mode explicitly. Thus, these
1486 files were ending up world-writeable. This was not a big issue, because,
1487 being within the spool directory, they were not world-accessible. I have
1488 created a function called modefopen, which takes an additional mode
1489 argument. It sets umask(777), creates the file, chmods it to the required
1490 mode, then resets the umask. All the relevant calls to fopen() in the
1491 content scanning code have been changed to use this function.
1493 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1494 to 24 hours. This avoids potential overflow problems when processing G
1495 and H retry rules. I suspect nobody ever tinkers with this value.
1497 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1499 PH/45 When the plaintext authenticator is running as a client, the server's
1500 challenges are checked to ensure they are valid base64 strings. By
1501 default, the authentication attempt is cancelled if an invalid string is
1502 received. Setting client_ignore_invalid_base64 true ignores these errors.
1503 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1504 they are received. Thus, the responses can be made to depend on the
1505 challenges. If an invalid string is ignored, an empty string is placed in
1508 PH/46 Messages that are created by the autoreply transport now contains a
1509 References: header, in accordance with RFCs 2822 and 3834.
1511 PH/47 Added authenticated_sender_force to the smtp transport.
1513 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1515 PH/49 Installed latest patch from the Sieve maintainer.
1517 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1518 was also set, the appendfile transport was unnecessarily scanning a
1519 directory of message files (e.g. for maildir delivery) to find the count
1520 of files (along with the size), even though it did not need this
1521 information. It now does the scan only if it needs to find either the
1522 size of the count of files.
1524 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1526 PH/52 Two bugs concerned with error handling when the smtp transport is
1529 (i) Exim was not creating retry information for temporary errors given
1530 for individual recipients after the DATA command when the smtp transport
1531 was used in LMTP mode. This meant that they could be retried too
1532 frequently, and not timed out correctly.
1534 (ii) Exim was setting the flag that allows error details to be returned
1535 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1536 recipients that were returned after the DATA command.
1538 PH/53 This is related to PH/52, but is more general: for any failing address,
1539 when detailed error information was permitted to be returned to the
1540 sender, but the error was temporary, then after the final timeout, only
1541 "retry timeout exceeded" was returned. Now it returns the full error as
1542 well as "retry timeout exceeded".
1544 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1545 do this, and (what is worse) MTAs that accept it.
1547 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1548 will now be deprecated.
1550 PH/56 New os.c-cygwin from the Cygwin maintainer.
1552 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1553 formats (previously only available in exim formats via -bpr, -bpru,
1554 and -bpra. Now also available in native and exiqgrep formats)
1556 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1557 with very large, slow to parse queues
1559 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1561 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1563 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1564 responses to authentication challenges, though it was showing the
1565 challenges; (ii) I've removed the CR characters from the debug output for
1568 PH/58 Allow for the insertion of a newline as well as a space when a string
1569 is turned into more than one encoded-word during RFC 2047 encoding. The
1570 Sieve code now uses this.
1572 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1573 data_4xx, lost_connection, tls_required.
1575 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1576 message was being sent as an SMTP response.
1578 PH/61 Add -l and -k options to exicyclog.
1580 PH/62 When verifying, if an address was redirected to one new address, so that
1581 verification continued, and the new address failed or deferred after
1582 having set something in $address_data, the value of $address_data was not
1583 passed back to the ACL. This was different to the case when no
1584 redirection occurred. The value is now passed back in both cases.
1586 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1587 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1588 use login_cap.h, so on its own it isn't the distinguishing feature. The
1589 new name refers directly to the setclassresources() function.
1591 PH/65 Added configuration files for NetBSD3.
1593 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1595 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1596 is preferred over IPv4.
1598 PH/68 The bounce_return_message and bounce_return_body options were not being
1599 honoured for bounces generated during the reception of non-SMTP messages.
1600 In particular, this applied to messages rejected by the ACL. This bug has
1601 been fixed. However, if bounce_return_message is true and bounce_return_
1602 body is false, the headers that are returned for a non-SMTP message
1603 include only those that have been read before the error was detected.
1604 (In the case of an ACL rejection, they have all been read.)
1606 PH/69 The HTML version of the specification is now built in a directory called
1607 spec_html instead of spec.html, because the latter looks like a path with
1608 a MIME-type, and this confuses some software.
1610 PH/70 Catch two compiler warnings in sieve.c.
1612 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1613 function verify_get_ident() calls ip_connect() to connect a socket, but
1614 if the "connect()" function timed out, ip_connect() used to close the
1615 socket. However, verify_get_ident() also closes the socket later, and in
1616 between Exim writes to the log, which may get opened at this point. When
1617 the socket was closed in ip_connect(), the log could get the same file
1618 descriptor number as the socket. This naturally causes chaos. The fix is
1619 not to close the socket in ip_connect(); the socket should be closed by
1620 the function that creates it. There was only one place in the code where
1621 this was missing, in the iplookup router, which I don't think anybody now
1622 uses, but I've fixed it anyway.
1624 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1625 well as to direct DNS lookups. Otherwise the handling of names in host
1626 lists is inconsistent and therefore confusing.
1632 PH/01 Two changes to the default runtime configuration:
1634 (1) Move the checks for relay_from_hosts and authenticated clients from
1635 after to before the (commented out) DNS black list checks.
1637 (2) Add control=submission to the relay_from_hosts and authenticated
1638 clients checks, on the grounds that messages accepted by these
1639 statements are most likely to be submissions.
1641 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1643 (1) Generate an error if the third argument for the ${prvs expansion is
1646 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1649 (3) Reset the variables that are obtained from the first argument of
1650 ${prvscheck and used in the second argument before leaving the code,
1651 because their memory is reclaimed, so using them afterwards may do
1654 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1655 one (it's much easier than Tom thought :-).
1657 (5) Because of (4), we can now allow for the use of $prvscheck_result
1658 inside the third argument.
1660 PH/03 For some reason, the default setting of PATH when running a command from
1661 a pipe transport was just "/usr/bin". I have changed it to
1664 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1665 anything to be listed in the output from -bV.
1667 PH/05 When a filter generated an autoreply, the entire To: header line was
1668 quoted in the delivery log line, like this:
1670 => >A.N.Other <ano@some.domain> <original@ddress> ...
1672 This has been changed so that it extracts the operative address. There
1673 may be more than one such address. If so, they are comma-separated, like
1676 => >ano@some.domain,ona@other.domain <original@ddress> ...
1678 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1679 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1680 not being looked up in the rDNS to get a host name, Exim was showing the
1681 IP address twice in Received: lines, even though the IP addresses were
1682 identical. For example:
1684 Received: from [1.2.3.4] (helo=[1.2.3.4])
1686 However, if the real host name was known, it was omitting the HELO data
1687 if it matched the actual IP address. This has been tidied up so that it
1688 doesn't show the same IP address twice.
1690 PH/07 When both +timestamp and +memory debugging was on, the value given by
1691 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1692 called by the debug printing, thereby overwriting the timestamp buffer.
1693 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1695 PH/08 When the original message was included in an autoreply transport, it
1696 always said "this is a copy of the message, including all the headers",
1697 even if body_only or headers_only was set. It now gives an appropriate
1700 PH/09 Applied a patch from the Sieve maintainer which:
1702 o fixes some comments
1703 o adds the (disabled) notify extension core
1704 o adds some debug output for the result of if/elsif tests
1705 o points to the current vacation draft in the documentation
1706 and documents the missing references header update
1710 o fixes a bug in processing the envelope test (when testing
1711 multiple envelope elements, the last element determinted the
1714 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1715 Electronic Mail") by including:
1717 Auto-submitted: auto-generated
1719 in the messages that it generates (bounce messages and others, such as
1720 warnings). In the case of bounce messages for non-SMTP mesages, there was
1721 also a typo: it was using "Auto_submitted" (underscore instead of
1722 hyphen). Since every message generated by Exim is necessarily in response
1723 to another message, thes have all been changed to:
1725 Auto-Submitted: auto-replied
1727 in accordance with these statements in the RFC:
1729 The auto-replied keyword:
1731 - SHOULD be used on messages sent in direct response to another
1732 message by an automatic process,
1734 - MUST NOT be used on manually-generated messages,
1736 - MAY be used on Delivery Status Notifications (DSNs) and Message
1737 Disposition Notifications (MDNs),
1739 - MUST NOT be used on messages generated by automatic or periodic
1740 processes, except for messages which are automatic responses to
1743 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1744 to the default Received: header definition.
1746 PH/12 Added log selector acl_warn_skipped (default on).
1748 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1749 variables because (a) they are in the wrong storage pool and (b) even if
1750 they were copied, it wouldn't work properly because of the caching.
1752 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1753 checking when decoding. Apparently there are clients that generate
1754 overlong encoded strings. Why am I not surprised?
1756 PH/15 If the first argument of "${if match_address" was not empty, but did not
1757 contain an "@" character, Exim crashed. Now it writes a panic log message
1758 and treats the condition as false.
1760 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1762 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1763 extension "envelope-auth". The code is finished and in agreement with
1764 other implementations, but there is no documentation so far and in fact,
1765 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1766 not changing the active code.
1768 Print executed "if" and "elsif" statements when debugging is used. This
1769 helps a great deal to understand what a filter does.
1771 Document more things not specified clearly in RFC3028. I had all this
1772 sorted out, when out of a sudden new issues came to my mind. Oops."
1774 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1777 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1778 canonical form (as documented). However, after a host name lookup from
1779 the IP address, check_host() was doing a simple string comparison with
1780 addresses acquired from the DNS when checking that the found name did
1781 have the original IP as one of its addresses. Since any found IPv6
1782 addresses are likely to be in abbreviated form, the comparison could
1783 fail. Luckily, there already exists a function for doing the comparison
1784 by converting both addresses to binary, so now that is used instead of
1785 the text comparison.
1787 PH/20 There was another similar case to PH/19, when a complete host name was
1788 given in a host list; looking up its IP address could give an abbreviated
1789 form, whereas the current host's name might or might not be abbreviated.
1790 The same fix has been applied.
1796 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1797 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1800 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1801 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1803 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1805 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1806 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1807 Also, for "Auto-Submitted", treat anything other than "no" as
1808 non-personal, in accordance with RFC 3834. (Previously it treated
1809 anything starting "auto-" as non-personal.)
1811 TF/01 The control=submission/name=... option had a problem with syntax
1812 errors if the name included a slash character. The /name= option
1813 now slurps the rest of the string, so it can include any characters
1814 but it must come last in the list of options (after /sender_retain
1817 PH/05 Some modifications to the interface to the fake nameserver for the new
1825 TK/01 Added the "success_on_redirect" address verification option. See
1826 NewStuff for rationale and an example.
1828 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1830 PH/02 Patch to exigrep to allow it to work on syslog lines.
1832 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1833 fread() to skip over the body file's header line, because in Cygwin the
1834 header line is locked and is inaccessible.
1836 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1837 co-exist for some time) to make it clear that it is the Exim ID that is
1838 referenced, not the Message-ID: header line.
1840 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1841 string_format() function, because snprintf() does not exist on all
1844 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1845 ${stat: expansion item.
1847 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1848 protocol synchronization error", to keep the pedants happy.
1850 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1851 well as for IRIX systems, when gcc is being used. See the host.c source
1854 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1856 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1859 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1860 transport and to the smtp transport in LMTP mode.
1862 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1864 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1865 run a filter in a subprocess. This could lead to confusion in subsequent
1866 lookups in the parent process. There should also be a search_tidyup() at
1867 the end of the subprocess.
1869 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1870 only if the host matched helo_try_verify_hosts, which caused the
1871 verification to occur when the EHLO/HELO command was issued. The ACL just
1872 tested the remembered result. Now, if a previous verification attempt has
1873 not happened, "verify = helo" does it there and then.
1875 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1877 TK/03 Fix log output including CR from clamd.
1879 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1880 exist provoked a memory error which could cause a segfault.
1882 PH/15 Installed PCRE 6.2
1884 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1886 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1887 of the problem. Specifically, suggested +O2 rather than +O1 for the
1890 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1892 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1893 record, the port was not correctly logged when the outgoing_port log
1894 selector was set (it logged the transort's default port).
1896 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1897 fallback_hosts, and "hosts" in the smtp transport.
1899 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1900 host errors such as "Connection refused".
1902 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1903 authentication with radiusclient 0.4.9:
1905 - Error returned from rc_read_config was caught wrongly
1906 - Username/password not passed on to radius server due to wrong length.
1908 The presumption is that some radiusclient API changes for 4.51/PH/17
1909 were not taken care of correctly. The code is still untested by me (my
1910 Linux distribution still has 0.3.2 of radiusclient), but it was
1911 contributed by a Radius user.
1913 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1914 expanding the "port" option of the smtp transport.
1916 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1917 while reading a MIME header. Thanks to Tom Hughes for a patch.
1919 PH/24 Include config.h inside local_scan.h so that configuration settings are
1922 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1923 that in an ACL for RCPT (for example), you can examine exactly what was
1926 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1927 commands, but it was not correctly comparing the address with the actual
1928 client host address. Thus, it would show the EHLO address in Received:
1929 header lines when this was not necessary.
1931 PH/27 Added the % operator to ${eval:}.
1933 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1934 it should be ignoring failures (because with -C, for example, it has lost
1935 privilege). It wasn't ignoring creation failures other than "already
1938 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1941 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1942 because an input line was too long, either on its own, or by virtue of
1943 too many continuations, the temporary file was not being removed, and the
1944 return code was incorrect.
1946 PH/31 Missing "BOOL" in function definition in filtertest.c.
1948 PH/32 Applied Sieve patches from the maintainer.
1950 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1952 PH/33 Added "verify = not_blind".
1954 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1955 Local/Makefile (with some defaults set). These are used in built scripts
1956 such as exicyclog, but they have never been used in the exim_install
1957 script (though there are many overriding facilities there). I have
1958 arranged that the exim_install script now takes note of these two
1961 PH/35 Installed configuration files for Dragonfly.
1963 PH/36 When a locally submitted message by a trusted user did not contain a
1964 From: header, and the sender address was obtained from -f or from an SMTP
1965 MAIL command, and the trusted user did not use -F to supply a sender
1966 name, $originator_name was incorrectly used when constructing a From:
1967 header. Furthermore, $originator_name was used for submission mode
1968 messages from external hosts without From: headers in a similar way,
1969 which is clearly wrong.
1971 PH/37 Added control=suppress_local_fixups.
1973 PH/38 When log_selector = +received_sender was set, and the addition of the
1974 sender made the log line's construction buffer exactly full, or one byte
1975 less than full, an overflow happened when the terminating "\n" was
1978 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1979 when the result of a list match is failure because a DNS lookup failed.
1981 PH/40 RM_COMMAND is now used in the building process.
1983 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1984 the "build-* directories that it finds.
1986 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1987 address in a domain literal was a prefix of an interface address.
1989 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1990 when verifying a sender address, unless rewrite_headers is false.
1992 PH/44 Wrote a long comment about why errors_to addresses are verified as
1993 recipients, not senders.
1995 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1996 the ratelimit ACL was added.
1998 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2000 PH/46 Added extra information about PostgreSQL errors to the error string.
2002 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2003 avoiding the need to install special zones in a real server. This is
2004 backwards compatible; if it can't find the fake resolver, it drops back.
2005 Thus, both old and new test suites can be run.
2007 TF/02 Added util/ratelimit.pl
2009 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2010 clock is set back in time.
2012 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2013 Candler <B.Candler@pobox.com>.
2015 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2016 OK for addresses that are the result of redirections.
2018 PH/48 A number of further additions for the benefit of the new test suite,
2019 including a fake gethostbyname() that interfaces to the fake DNS resolver
2022 TF/06 The fix for widen_domains has also been applied to qualify_single and
2023 search_parents which are the other dnslookup options that can cause
2026 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2029 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2031 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2032 service" if it encountered an MX record with an empty target hostname.
2033 The message is now "an MX or SRV record indicated no SMTP service".
2035 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2036 if the DNS of the sending site is misconfigured. This is quite a
2037 common situation. This change restores the behaviour of treating a
2038 helo verification defer as a failure.
2040 PH/51 If self=fail was set on a router, the bounce message did not include the
2041 actual error message.
2047 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2049 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2050 command itself ended in error, the underlying message about the transport
2051 filter timeout was being overwritten with the pipe command error. Now the
2052 underlying error message should be appended to the second error message.
2054 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2056 PH/02 Reduce the amount of output that "make" produces by default. Full output
2057 can still be requested.
2059 PH/03 The warning log line about a condition test deferring for a "warn" verb
2060 was being output only once per connection, rather than after each
2061 occurrence (because it was using the same function as for successful
2062 "warn" verbs). This seems wrong, so I have changed it.
2064 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2065 it should not have, which might have caused a crash in the right
2066 circumstances, but probably never did.
2068 PH/04 Installed a modified version of Tony Finch's patch to make submission
2069 mode fix the return path as well as the Sender: header line, and to
2070 add a /name= option so that you can make the user's friendly name appear
2073 TF/03 Added the control = fakedefer ACL modifier.
2075 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2076 Mark Lowes for thorough testing.
2078 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2080 TK/03 Merged latest SRS patch from Miles Wilton.
2082 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2083 with the definition in sysexits.h (which is #included earlier).
2084 Fortunately, Exim does not actually use EX_OK. The code used to try to
2085 preserve the sysexits.h value, by assumimg that macro definitions were
2086 scanned for macro replacements. I have been disabused of this notion,
2087 so now the code just undefines EX_OK before #including unistd.h.
2089 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2090 in the smtp transport. When a block could not be written in a single
2091 write() function, the timeout was being re-applied to each part-write.
2092 This seems wrong - if the receiver was accepting one byte at a time it
2093 would take for ever. The timeout is now adjusted when this happens. It
2094 doesn't have to be particularly precise.
2096 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2097 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2099 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2100 without a domain if the check to <postmaster@domain> fails.
2102 SC/01 Eximstats: added -xls and the ability to specify output files
2103 (patch written by Frank Heydlauf).
2105 SC/02 Eximstats: use FileHandles for outputing results.
2107 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2109 SC/04 Eximstats: fixed display of large numbers with -nvr option
2111 SC/05 Eximstats: fixed merging of reports with empty tables.
2113 SC/06 Eximstats: added the -include_original_destination flag
2115 SC/07 Eximstats: removed tabs and trailing whitespace.
2117 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2119 TK/06 MBOX spool code: Add real "From " MBOX separator line
2120 so the .eml file is really in mbox format (even though
2121 most programs do not really care). Patch from Alex Miller.
2123 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2124 The latter is generated from $received_to and is only set if the
2125 message has one envelope recipient. SA can use these headers,
2126 obviously out-of-the-box. Patch from Alex Miller.
2128 PH/08 The ${def test on a variable was returning false if the variable's
2129 value was "0", contrary to what the specification has always said!
2130 The result should be true unless the variable is empty.
2132 PH/09 The syntax error of a character other than { following "${if
2133 def:variable_name" (after optional whitespace) was not being diagnosed.
2134 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2135 accidental colon was present, for example, could give incorrect results.
2137 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2138 result is used (not including appendfile, where other changes are about
2141 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2142 This involved changing a lot of size variables from int to off_t. It
2143 should work with maildirs and everything.
2145 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2146 spamd dying while we are connected to it.
2148 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2151 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2152 function for BDB 4.3.
2154 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2156 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2157 the sources for PCRE have been re-arranged and more files are now
2160 PH/15 The code I had for printing potentially long long variables in PH/11
2161 above was not the best (it lost precision). The length of off_t variables
2162 is now inspected at build time, and an appropriate printing format (%ld
2163 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2164 to be "long long int" or "long int". This is needed for the internal
2165 formatting function string_vformat().
2167 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2168 the configuration file to be ":syslog", then the script "guesses" where
2169 the logs files are, rather than using the compiled in default. In our
2170 case the guess is not the same as the compiled default, so the script
2171 suddenly stopped working when I started to use syslog. The patch checks
2172 to see if log_file_path is "". If so, it attempts to read it from exim
2173 with no configuration file to get the compiled in version, before it
2174 falls back to the previous guessing code."
2176 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2177 implementing BATV in an Exim configuration. See NewStuff for the gory
2180 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2181 Makefile that are specific to HP-UX.
2183 PH/18 If the "use_postmaster" option was set for a recipient callout together
2184 with the "random" option, the postmaster address was used as the MAIL
2185 FROM address for the random test, but not for the subsequent recipient
2186 test. It is now used for both.
2188 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2189 patch removes a few documentation additions to RFC 3028, because the
2190 latest draft now contains them. It adds the new en;ascii-case comparator
2191 and a new error check for 8bit text in MIME parts. Comparator and
2192 require names are now matched exactly. I enabled the subaddress
2193 extension, but it is not well tested yet (read: it works for me)."
2195 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2196 rework some of the code of TK/09 above to avoid the hardwired use of
2197 "%lld" and "long long". Replaced the call to snprintf() with a call to
2200 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2201 records point to non-existent hosts", "retry timeout exceeded", and
2202 "retry time not reached for any host after a long failure period".
2204 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2205 experimental DomainKeys support:
2207 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2208 (2) On an error such as an illegally used "control", the wrong name for
2209 the control was given.
2211 These problems did NOT occur unless DomainKeys support was compiled.
2213 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2215 PH/24 Added ${if match_ip condition.
2217 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2218 databases so that it will be absolutely obvious if a crash occurs in the
2219 DB library. This is a regular occurrence (often caused by mis-matched
2222 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2223 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2224 picked up on a user's system that detects such things. There doesn't seem
2225 to be a gcc warning option for this - only an attribute that has to be
2226 put on the function's prototype. It seems that in Fedora Core 4 they have
2227 set this on a number of new functions. No doubt there will be more in due
2230 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2231 specify a transport. However, if an address that was verified by such a
2232 router was the subject of a callout, Exim crashed because it tried to
2233 read the rcpt_include_affixes from the non-existent transport. Now it
2234 just assumes that the setting of that option is false. This bug was
2235 introduced by 4.51/PH/31.
2237 PH/28 Changed -d+all to exclude +memory, because that information is very
2238 rarely of interest, but it makes the output a lot bigger. People tend to
2239 do -d+all out of habit.
2241 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2242 code in os-type was giving problems when libc.so lives in lib64, like on
2245 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2246 aren't the modern standard, and it seems that some systems' include files
2247 don't always have them. Exim was already checking for some of the newer
2248 ones like T_AAAA, and defining it itself. I've added checks for all the
2249 record types that Exim uses.
2251 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2252 not automatically generating a new one, as it is supposed to. This
2253 prevented TLS from working. If the file did exist, but contained invalid
2254 data, a new version was generated, as expected. It was only the case of a
2255 non-existent file that was broken.
2257 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2258 with a change in libdomainkeys > 0.64.
2260 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2261 from DNS. If the selector record carries the flag, it now has
2262 precedence over the domain-wide flag.
2264 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2266 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2267 the use of a port name that isn't defined in /etc/services) occurred, the
2268 message was deferred as in a normal delivery, and thus remained on the
2269 spool, instead of being failed because of the mua_wrapper setting. This
2270 is now fixed, and I tidied up some of the mua_wrapper messages at the
2273 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2274 the messages in a hash of arrays rather than using individual hashes.
2275 This is a bit cleaner and results in dramatic memory savings, albeit
2276 at a slight CPU cost.
2278 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2279 as requested by Marc Sherman.
2281 SC/10 Eximstats: added histograms for user specified patterns as requested
2284 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2286 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2287 fopen() in the content-scanning modules that did not already have it.
2293 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2294 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2296 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2298 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2300 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2301 to test Sieve filters that use "vacation".
2303 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2304 that changes the way the GnuTLS parameters are stored in the cache file.
2305 The new format can be generated externally. For backward compatibility,
2306 if the data in the cache doesn't make sense, Exim assumes it has read an
2307 old-format file, and it generates new data and writes a new file. This
2308 means that you can't go back to an older release without removing the
2311 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2312 work if there are any delivery delays because "one_time" forces the
2313 parent to be marked "delivered", so its unseen clone is never tried
2314 again. For this reason, Exim now forbids the simultaneous setting of
2317 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2318 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2319 entry if you want to know the details. The fix, however, neglected to
2320 consider the case when local delivery batching is involved. The test for
2321 "previously delivered" was not happening when checking to see if an
2322 address could be batched with a previous (undelivered) one; under
2323 certain circumstances this could lead to multiple deliveries to the same
2326 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2327 in its include files, and this causes problems building Exim.
2329 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2330 header_syntax) but Exim was just ignoring anything given after a slash.
2331 In particular, this caused confusion with an attempt to use "verify =
2332 reverse_host_lookup/defer_ok". An error is now given when options are
2333 supplied for verify items that do not have them. (Maybe reverse_host_
2334 lookup should have a defer_ok option, but that's a different point.)
2336 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2337 defined by RFC 821) to 2048, because there were problems with some AUTH
2338 commands, and RFC 1869 says the size should be increased for extended
2339 SMTP commands that take arguments.
2341 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2344 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2345 "unknown" error; now it says that the functionality isn't in the binary.
2347 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2348 an address' error message when a string expansion fails (syntax or
2349 whatever). Otherwise the password may appear in the log. Following change
2350 PH/42 below, there is no longer a chance of it appearing in a bounce
2353 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2355 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2356 of its addresses was ever tried. (Bugzilla bug #2.)
2358 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2359 the result incorrectly in the debug output. (It correctly added a newline
2360 to what was transported.)
2362 TF/01 Added $received_time.
2364 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2365 commented out examples of how to interface to a virus scanner and to
2366 SpamAssassin. Also added commented examples of av_scanner and
2367 spamd_address settings.
2369 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2370 and controls are allowed in which ACLs. There were a couple of minor
2371 errors. Some of the entries in the conditions table (which is a table of
2372 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2373 negation of where the condition IS allowed.
2375 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2377 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2378 header file does not have a version number, so I've had to invent a new
2379 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2380 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2381 radiusclient), but it was contributed by a Radius user.
2383 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2384 files or directories, for OpenSSL.
2386 PH/19 When an Exim process that is running as root has to create an Exim log
2387 file, it does so in a subprocess that runs as exim:exim so as to get the
2388 ownership right at creation (otherwise, other Exim processes might see
2389 the file with the wrong ownership). There was no test for failure of this
2390 fork() call, which would lead to the process getting stuck as it waited
2391 for a non-existent subprocess. Forks do occasionally fail when resources
2392 run out. I reviewed all the other calls to fork(); they all seem to check
2395 PH/20 When checking for unexpected SMTP input at connect time (before writing
2396 the banner), Exim was not dealing correctly with a non-positive return
2397 from the read() function. If the client had disconnected by this time,
2398 the result was a log entry for a synchronization error with an empty
2399 string after "input=" when read() returned zero. If read() returned -1
2400 (an event I could not check), uninitialized data bytes were printed.
2401 There were reports of junk text (parts of files, etc) appearing after
2404 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2406 PH/22 Added support for macro redefinition, and (re)definition in between
2407 driver and ACL definitions.
2409 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2410 forgetting to use the resulting value; it was using the unexpanded value.
2412 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2413 hadn't been configured. The fix is from Juergen Kreileder, who
2414 understands it better than I do:
2416 "Here's what I see happening with three configured cyrus_sasl
2417 authenticators configured (plain, login, cram-md5):
2419 On startup auth_cyrus_sasl_init() gets called for each of these.
2420 This means three calls to sasl_listmech() without a specified mech_list.
2421 => SASL tests which mechs of all available mechs actually work
2422 => three warnings about OTP not working
2423 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2425 With the patch, sasl_listmech() also gets called three times. But now
2426 SASL's mech_list option is set to the server_mech specified in the the
2427 authenticator. Or in other words, the answer from sasl_listmech()
2428 gets limited to just the mech you're testing for (which is different
2430 => the return list contains just 'plain' or 'login', 'cram-md5' or
2431 nothing depending on the value of ob->server_mech.
2433 I've just tested the patch: Authentication still works fine,
2434 unavailable mechs specified in the exim configuration are still
2435 caught, and the auth.log warnings about OTP are gone."
2437 PH/25 When debugging is enabled, the contents of the command line are added
2438 to the debugging output, even when log_selector=+arguments is not
2441 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2442 answer is "GNU", and only if the return is "GNU/something" is the answer
2445 PH/27 $acl_verify_message is now set immediately after the failure of a
2446 verification in an ACL, and so is available in subsequent modifiers. In
2447 particular, the message can be preserved by coding like this:
2449 warn !verify = sender
2450 set acl_m0 = $acl_verify_message
2452 Previously, $acl_verify_message was set only while expanding "message"
2453 and "log_message" when a very denied access.
2455 PH/28 Modified OS/os.c-Linux with
2457 -#ifndef OS_LOAD_AVERAGE
2458 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2460 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2461 nomenclature these days.)
2463 PH/29 Installed patch from the Sieve maintainer that adds the options
2464 sieve_useraddress and sieve_subaddress to the redirect router.
2466 PH/30 In these circumstances:
2467 . Two addresses routed to the same list of hosts;
2468 . First host does not offer TLS;
2469 . First host accepts first address;
2470 . First host gives temporary error to second address;
2471 . Second host offers TLS and a TLS session is established;
2472 . Second host accepts second address.
2473 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2474 and peerdn, if requested) that were in fact used only for the second
2477 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2478 attention to any local part prefix or suffix that was matched by the
2479 router that accepted the address. It now behaves in the same way as it
2480 does for delivery: the affixes are removed from the local part unless
2481 rcpt_include_affixes is set on the transport.
2483 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2484 timeout during the DATA phase of an incoming message.
2486 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2487 applied a patch sanctioned by the Sieve maintainer.
2489 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2490 the uid or gid is negative. A case of a negative gid caused this to be
2491 noticed. The fix allows for either to be negative.
2493 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2494 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2497 PH/36 The change PH/12 above was broken. Fixed it.
2499 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2500 the grounds that routing the same address twice would always produce the
2501 same answer. This might have been true once, but it is certainly no
2502 longer true now. Routing a child address may depend on the previous
2503 routing that produced that child. Some complicated redirection strategies
2504 went wrong when messages had multiple recipients, and made Exim's
2505 behaviour dependent on the order in which the addresses were given.
2507 I have moved the duplicate checking until after the routing is complete.
2508 Exim scans the addresses that are assigned to local and remote
2509 transports, and removes any duplicates. This means that more work will be
2510 done, as duplicates will always all be routed, but duplicates are
2511 presumably rare, so I don't expect this is of any significance.
2513 For deliveries to pipes, files, and autoreplies, the duplicate checking
2514 still happens during the routing process, since they are not going to be
2517 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2518 It corrects a timeout issue with spamd. This is Ian's comment: "The
2519 background is that sometimes spamd either never reads data from a
2520 connection it has accepted, or it never writes response data. The exiscan
2521 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2522 blindly assumes that writes won't block so it may never time out."
2524 PH/39 Allow G after quota size as well as K and M.
2526 PH/40 The value set for $authenticated_id in an authenticator may not contain
2527 binary zeroes or newlines because the value is written to log lines and
2528 to spool files. There was no check on this. Now the value is run through
2529 the string_printing() function so that such characters are converted to
2530 printable escape sequences.
2532 PH/41 $message_linecount is a new variable that contains the total number of
2533 lines in the message. Compare $body_linecount, which is the count for the
2536 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2537 bounce and delay warning messages, except in certain special cases, which
2540 (a) An SMTP error message from a remote host;
2541 (b) A message specified in a :fail: redirection;
2542 (c) A message specified in a "fail" command in a system filter;
2543 (d) A message specified in a FAIL return from the queryprogram router;
2544 (e) A message specified by the cannot_route_message router option.
2546 In these cases only, Exim does include the error details in bounce and
2547 warning messages. There are also a few cases where bland messages such
2548 as "unrouteable address" or "local delivery error" are given.
2550 PH/43 $value is now also set for the "else" part of a ${run expansion.
2552 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2553 being worked on, but at least Exim now implements the latest version to
2556 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2557 process to complete was treated as a delivery failure, a timeout while
2558 writing the message to the pipe was logged, but erroneously treated as a
2559 successful delivery. Such timeouts include transport filter timeouts. For
2560 consistency with the overall process timeout, these timeouts are now
2561 treated as errors, giving rise to delivery failures by default. However,
2562 there is now a new Boolean option for the pipe transport called
2563 timeout_defer, which, if set TRUE, converts the failures into defers for
2564 both kinds of timeout. A transport filter timeout is now identified in
2567 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2568 systems where "make" and "gmake" are different, calling "gmake" at top
2569 level broke things. I've arranged for the value of $(MAKE) to be passed
2570 from the Makefile to this script so that it can call the same version of
2574 A note about Exim versions 4.44 and 4.50
2575 ----------------------------------------
2577 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2578 changes of various kinds. As a consequence, a big documentation update was
2579 needed. This delayed the release for rather longer than seemed good, especially
2580 in the light of a couple of (minor) security issues. Therefore, the changes
2581 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2582 release. So 4.44 and 4.50 are in effect two different branches that both start
2585 I have left the 4.50 change log unchanged; it contains all the changes since
2586 4.43. The change log for 4.44 is below; many of its items are identical to
2587 those for 4.50. This seems to be the most sensible way to preserve the
2588 historical information.
2594 1. Minor wording change to the doc/README.SIEVE file.
2596 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2597 computation of the current number of files was incorrect.
2599 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2600 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2603 4. Give more explanation in the error message when the command for a transport
2604 filter fails to execute.
2606 5. There are several places where Exim runs a non-Exim command in a
2607 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2608 was being done only for the command run by the queryprogram router. It is
2609 now done for all such subprocesses. The other cases are: ${run, transport
2610 filters, and the commands run by the lmtp and pipe transports.
2612 6. Added CONFIGURE_GROUP build-time option.
2614 7. Some older OS have a limit of 256 on the maximum number of file
2615 descriptors. Exim was using setrlimit() to set 1000 as a large value
2616 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2617 systems. I've change it so that if it can't get 1000, it tries for 256.
2619 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2620 was an oversight, and furthermore, ever since the addition of extra
2621 controls (e.g. 4.43/32), the checks on when to allow different forms of
2622 "control" were broken. There should now be diagnostics for all cases when a
2623 control that does not make sense is encountered.
2625 9. Added the /retain_sender option to "control=submission".
2627 10. $recipients is now available in the predata ACL (oversight).
2629 11. Tidy the search cache before the fork to do a delivery from a message
2630 received from the command line. Otherwise the child will trigger a lookup
2631 failure and thereby defer the delivery if it tries to use (for example) a
2632 cached ldap connection that the parent has called unbind on.
2634 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2635 of $address_data from the recipient verification was clobbered by the
2636 sender verification.
2638 13. The value of address_data from a sender verification is now available in
2639 $sender_address_data in subsequent conditions in the ACL statement.
2641 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2643 15. Added a new option "connect=<time>" to callout options, to set a different
2646 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2647 was its contents. (It was OK if the option was not defined at all.)
2649 17. A "Completed" log line is now written for messages that are removed from
2650 the spool by the -Mrm option.
2652 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2653 information about exactly what failed.
2655 19. Added -dd to debug only the daemon process.
2657 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2658 handles timeouts, both on the server side and network timeouts. Renamed the
2659 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2661 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2662 It is now set to "smtps".
2664 22. $host_address is now set to the target address during the checking of
2665 ignore_target_hosts.
2667 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2668 being passed; this would have caused $sender_host_name to have been used if
2669 matching the list had actually called for a host name (not very likely,
2670 since this list is usually IP addresses). A host name is now passed as
2673 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2674 code that specifies a non-restarting handler (typically sigaction() in
2675 modern systems) in an attempt to fix a rare and obscure crash bug.
2677 25. Narrowed the window for a race in the daemon that could cause it to ignore
2678 SIGCHLD signals. This is not a major problem, because they are used only to
2679 wake it up if nothing else does.
2681 26. A malformed maildirsize file could cause Exim to calculate negative values
2682 for the mailbox size or file count. Odd effects could occur as a result.
2683 The maildirsize information is now recalculated if the size or filecount
2686 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2687 support for a long time. Removed HAVE_SYS_VFS_H.
2689 28. Installed the latest version of exipick from John Jetmore.
2691 29. In an address list, if the pattern was not a regular expression, an empty
2692 subject address (from a bounce message) matched only if the pattern was an
2693 empty string. Non-empty patterns were not even tested. This was the wrong
2694 because it is perfectly reasonable to use an empty address as part of a
2695 database query. An empty address is now tested by patterns that are
2696 lookups. However, all the other forms of pattern expect the subject to
2697 contain a local part and a domain, and therefore, for them, an empty
2698 address still always fails if the pattern is not itself empty.
2700 30. Exim went into a mad DNS loop when attempting to do a callout where the
2701 host was specified on an smtp transport, and looking it up yielded more
2702 than one IP address.
2704 31. Re-factored the code for checking spool and log partition space into a
2705 function that finds that data and another that does the check. The former
2706 is then used to implement four new variables: $spool_space, $log_space,
2707 $spool_inodes, and $log_inodes.
2709 32. The RFC2047 encoding function was originally intended for short strings
2710 such as real names; it was not keeping to the 75-character limit for
2711 encoded words that the RFC imposes. It now respects the limit, and
2712 generates multiple encoded words if necessary. To be on the safe side, I
2713 have increased the buffer size for the ${rfc2047: expansion operator from
2716 33. It is now permitted to omit both strings after an "if" condition; if the
2717 condition is true, the result is "true". As before, when the second string
2718 is omitted, a false condition yields an empty string. This makes it less
2719 cumbersome to write custom ACL and router conditions.
2721 34. Failure to deliver a bounce message always caused it to be frozen, even if
2722 there was an errors_to setting on the router. The errors_to setting is now
2725 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2726 canonical form (fully expanded) before being placed in
2727 $sender_host_address.
2729 36. The table in the code that translates DNS record types into text (T_A to
2730 "A" for instance) was missing entries for NS and CNAME. It is just possible
2731 that this could have caused confusion if both these types were looked up
2732 for the same domain, because the text type is used as part of Exim's
2733 per-process caching. But the chance of anyone hitting this buglet seems
2736 37. The dnsdb lookup has been extended in a number of ways.
2738 (1) There is a new type, "zns", which walks up the domain tree until it
2739 finds some nameserver records. It should be used with care.
2741 (2) There is a new type, "mxh", which is like "mx" except that it returns
2742 just the host names, not the priorities.
2744 (3) It is now possible to give a list of domains (or IP addresses) to be
2745 looked up. The behaviour when one of the lookups defers can be
2746 controlled by a keyword.
2748 (4) It is now possible to specify the separator character for use when
2749 multiple records are returned.
2751 38. The dnslists ACL condition has been extended: it is now possible to supply
2752 a list of IP addresses and/or domains to be looked up in a particular DNS
2755 39. Added log_selector=+queue_time_overall.
2757 40. When running the queue in the test harness, wait just a tad after forking a
2758 delivery process, to get repeatability of debugging output.
2760 41. Include certificate and key file names in error message when GnuTLS fails
2761 to set them up, because the GnuTLS error message doesn't include the name
2762 of the failing file when there is a problem reading it.
2764 42. Allow both -bf and -bF in the same test run.
2766 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2768 44. The "Exiscan patch" is now merged into the mainline Exim source.
2770 45. Sometimes the final signoff response after QUIT could fail to get
2771 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2772 < 0 before doing a fflush(). This bug looks as though it goes back to the
2773 introduction of TLS in release 3.20, but "sometimes" must have been rare
2774 because the tests only now provoked it.
2776 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2777 (this can affect the format of dates).
2779 47. exim_tidydb, when checking for the continued existence of a message for
2780 which it has found a message-specific retry record, was not finding
2781 messages that were in split spool directories. Consequently, it was
2782 deleting retry records that should have stayed in existence.
2784 48. Steve fixed some bugs in eximstats.
2786 49. The SPA authentication driver was not abandoning authentication and moving
2787 on to the next authenticator when an expansion was forced to fail,
2788 contradicting the general specification for all authenticators. Instead it
2789 was generating a temporary error. It now behaves as specified.
2791 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2792 (the order specifies the preference for clients). The order is now AES256,
2793 AES128, 3DES, ARCFOUR128.
2795 51. Small patch to Sieve code - explicitly set From: when generating an
2798 52. Exim crashed if a remote delivery caused a very long error message to be
2799 recorded - for instance if somebody sent an entire SpamAssassin report back
2800 as a large number of 550 error lines. This bug was coincidentally fixed by
2801 increasing the size of one of Exim's internal buffers (big_buffer) that
2802 happened as part of the Exiscan merge. However, to be on the safe side, I
2803 have made the code more robust (and fixed the comments that describe what
2806 53. Now that there can be additional text after "Completed" in log lines (if
2807 the queue_time_overall log selector is set), a one-byte patch to exigrep
2808 was needed to allow it to recognize "Completed" as not the last thing in
2811 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2812 patch that reportedly fixes this has been added. I am not expert enough to
2813 create a test for it. This is what the patch creator wrote:
2815 "I found a little strange behaviour of ldap code when working with
2816 Windows 2003 AD Domain, where users was placed in more than one
2817 Organization Units. When I tried to give exim partial DN, the exit code
2818 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2819 But simultaneously result of request was absolutely normal ldap result,
2820 so I produce this patch..."
2822 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2823 REFERENCE, so I have modified the code to exclude the patch when that macro
2826 55. Some experimental protocols are using DNS PTR records for new purposes. The
2827 keys for these records are domain names, not reversed IP addresses. The
2828 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2829 leaves it alone. Component reversal etc. now happens only for IP addresses.
2832 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2834 57. Double the size of the debug message buffer (to 2048) so that more of very
2835 long debug lines gets shown.
2837 58. The exicyclog utility now does better if the number of log files to keep
2838 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2840 59. Two changes related to the smtp_active_hostname option:
2842 (1) $smtp_active_hostname is now available as a variable.
2843 (2) The default for smtp_banner uses $smtp_active_hostname instead
2844 of $primary_hostname.
2846 60. The host_aton() function is supposed to be passed a string that is known
2847 to be a valid IP address. However, in the case of IPv6 addresses, it was
2848 not checking this. This is a hostage to fortune. Exim now panics and dies
2849 if the condition is not met. A case was found where this could be provoked
2850 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2851 components; fortuitously, this particular loophole had already been fixed
2852 by change 4.50/55 above.
2854 If there are any other similar loopholes, the new check in host_aton()
2855 itself should stop them being exploited. The report I received stated that
2856 data on the command line could provoke the exploit when Exim was running as
2857 exim, but did not say which command line option was involved. All I could
2858 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2859 running as the user.
2862 61. There was a buffer overflow vulnerability in the SPA authentication code
2863 (which came originally from the Samba project). I have added a test to the
2864 spa_base64_to_bits() function which I hope fixes it.
2867 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2868 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2870 63. The daemon start-up calls getloadavg() while still root for those OS that
2871 need the first call to be done as root, but it missed one case: when
2872 deliver_queue_load_max is set with deliver_drop_privilege. This is
2873 necessary for the benefit of the queue runner, because there is no re-exec
2874 when deliver_drop_privilege is set.
2876 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2877 This has been fixed.
2879 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2880 was in use, was not putting the data itself into the right store pool;
2881 consequently, it could be overwritten for a subsequent message in the same
2882 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2885 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2887 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2888 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2889 the function were treating the return as a boolean value, which happened to
2890 work because 0=false and not-0=true, but is not correct code.
2892 68. The host_aton() function was not handling scoped IPv6 addresses (those
2893 with, for example, "%eth0" on the end) correctly.
2895 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2896 negated items (that is, ~something) in unsigned ints. Some compilers
2897 apparently mutter when there is no cast.
2899 70. If an address verification called from an ACL failed, and did not produce a
2900 user-specific message (i.e. there was only a "system" message), nothing was
2901 put in $acl_verify_message. In this situation, it now puts the system
2904 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2905 session; change 4.31/43 added the unwanted input to the log line - except
2906 that it did not do this in the start of session case. It now does.
2908 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2909 This is wrong and can cause the other end to generate a synchronization
2910 error if it is another Exim or anything else that does the synchronization
2911 check. A QUIT command is no longer sent after a timeout.
2913 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2914 during host lookups.
2916 74. The defer_ok option of callout verification was not working if it was used
2917 when verifying addresses in header lines, that is, for this case:
2919 verify = header_sender/callout=defer_ok
2921 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2922 those file descriptors could be used for SMTP connections. If anything
2923 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2924 could be sent to the SMTP client, causing chaos. The daemon now opens
2925 stdin, stdout, and stderr to /dev/null when it puts itself into the
2928 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2929 log by default. The user can override this with suitable Perl magic.
2931 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2932 the log message when discard triggers, was not working for the DATA ACL or
2933 for the non-SMTP ACL.
2935 78. Error message wording change in sieve.c.
2937 79. If smtp_accept_max_per_host was set, the number of connections could be
2938 restricted to fewer than expected, because the daemon was trying to set up
2939 a new connection before checking whether the processes handling previous
2940 connections had finished. The check for completed processes is now done
2941 earlier. On busy systems, this bug wouldn't be noticed because something
2942 else would have woken the daemon, and it would have reaped the completed
2945 80. If a message was submitted locally by a user whose login name contained one
2946 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2947 It caused a spool format error. I have fixed the spool reading code. A
2948 related problem was that the "from" clause in the Received: line became
2949 illegal because of the space(s). It is now covered by ${quote_local_part.
2951 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2954 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2956 83. Patch from Sieve maintainer to fix unterminated string problem in
2957 "vacation" handling.
2959 84. Some minor changes to the Linux configuration files to help with other
2960 OS variants using glibc.
2962 85. One more patch for Sieve to update vacation handling to latest spec.
2965 ----------------------------------------------------
2966 See the note above about the 4.44 and 4.50 releases.
2967 ----------------------------------------------------
2973 1. Change 4.43/35 introduced a bug that caused file counts to be
2974 incorrectly computed when quota_filecount was set in an appendfile
2977 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2978 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2981 3. Give more explanation in the error message when the command for a transport
2982 filter fails to execute.
2984 4. There are several places where Exim runs a non-Exim command in a
2985 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2986 was being done only for the command run by the queryprogram router. It is
2987 now done for all such subprocesses. The other cases are: ${run, transport
2988 filters, and the commands run by the lmtp and pipe transports.
2990 5. Some older OS have a limit of 256 on the maximum number of file
2991 descriptors. Exim was using setrlimit() to set 1000 as a large value
2992 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2993 systems. I've change it so that if it can't get 1000, it tries for 256.
2995 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2996 was an oversight, and furthermore, ever since the addition of extra
2997 controls (e.g. 4.43/32), the checks on when to allow different forms of
2998 "control" were broken. There should now be diagnostics for all cases when a
2999 control that does not make sense is encountered.
3001 7. $recipients is now available in the predata ACL (oversight).
3003 8. Tidy the search cache before the fork to do a delivery from a message
3004 received from the command line. Otherwise the child will trigger a lookup
3005 failure and thereby defer the delivery if it tries to use (for example) a
3006 cached ldap connection that the parent has called unbind on.
3008 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3009 of $address_data from the recipient verification was clobbered by the
3010 sender verification.
3012 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3013 was its contents. (It was OK if the option was not defined at all.)
3015 11. A "Completed" log line is now written for messages that are removed from
3016 the spool by the -Mrm option.
3018 12. $host_address is now set to the target address during the checking of
3019 ignore_target_hosts.
3021 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3022 being passed; this would have caused $sender_host_name to have been used if
3023 matching the list had actually called for a host name (not very likely,
3024 since this list is usually IP addresses). A host name is now passed as
3027 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3028 code that specifies a non-restarting handler (typically sigaction() in
3029 modern systems) in an attempt to fix a rare and obscure crash bug.
3031 15. Narrowed the window for a race in the daemon that could cause it to ignore
3032 SIGCHLD signals. This is not a major problem, because they are used only to
3033 wake it up if nothing else does.
3035 16. A malformed maildirsize file could cause Exim to calculate negative values
3036 for the mailbox size or file count. Odd effects could occur as a result.
3037 The maildirsize information is now recalculated if the size or filecount
3040 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3041 support for a long time. Removed HAVE_SYS_VFS_H.
3043 18. Updated exipick to current release from John Jetmore.
3045 19. Allow an empty sender to be matched against a lookup in an address list.
3046 Previously the only cases considered were a regular expression, or an
3049 20. Exim went into a mad DNS lookup loop when doing a callout where the
3050 host was specified on the transport, if the DNS lookup yielded more than
3053 21. The RFC2047 encoding function was originally intended for short strings
3054 such as real names; it was not keeping to the 75-character limit for
3055 encoded words that the RFC imposes. It now respects the limit, and
3056 generates multiple encoded words if necessary. To be on the safe side, I
3057 have increased the buffer size for the ${rfc2047: expansion operator from
3060 22. Failure to deliver a bounce message always caused it to be frozen, even if
3061 there was an errors_to setting on the router. The errors_to setting is now
3064 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3065 canonical form (fully expanded) before being placed in
3066 $sender_host_address.
3068 24. Updated eximstats to version 1.33
3070 25. Include certificate and key file names in error message when GnuTLS fails
3071 to set them up, because the GnuTLS error message doesn't include the name
3072 of the failing file when there is a problem reading it.
3074 26. Expand error message when OpenSSL has problems setting up cert/key files.
3077 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3078 (this can affect the format of dates).
3080 28. exim_tidydb, when checking for the continued existence of a message for
3081 which it has found a message-specific retry record, was not finding
3082 messages that were in split spool directories. Consequently, it was
3083 deleting retry records that should have stayed in existence.
3085 29. eximstats updated to version 1.35
3086 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3087 1.35 - bugfix such that pie charts by volume are generated correctly
3089 30. The SPA authentication driver was not abandoning authentication and moving
3090 on to the next authenticator when an expansion was forced to fail,
3091 contradicting the general specification for all authenticators. Instead it
3092 was generating a temporary error. It now behaves as specified.
3094 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3095 (the order specifies the preference for clients). The order is now AES256,
3096 AES128, 3DES, ARCFOUR128.
3098 31. Small patch to Sieve code - explicitly set From: when generating an
3101 32. Exim crashed if a remote delivery caused a very long error message to be
3102 recorded - for instance if somebody sent an entire SpamAssassin report back
3103 as a large number of 550 error lines. This bug was coincidentally fixed by
3104 increasing the size of one of Exim's internal buffers (big_buffer) that
3105 happened as part of the Exiscan merge. However, to be on the safe side, I
3106 have made the code more robust (and fixed the comments that describe what
3109 33. Some experimental protocols are using DNS PTR records for new purposes. The
3110 keys for these records are domain names, not reversed IP addresses. The
3111 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3112 leaves it alone. Component reversal etc. now happens only for IP addresses.
3115 34. The host_aton() function is supposed to be passed a string that is known
3116 to be a valid IP address. However, in the case of IPv6 addresses, it was
3117 not checking this. This is a hostage to fortune. Exim now panics and dies
3118 if the condition is not met. A case was found where this could be provoked
3119 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3120 components; fortuitously, this particular loophole had already been fixed
3121 by change 4.50/55 or 4.44/33 above.
3123 If there are any other similar loopholes, the new check in host_aton()
3124 itself should stop them being exploited. The report I received stated that
3125 data on the command line could provoke the exploit when Exim was running as
3126 exim, but did not say which command line option was involved. All I could
3127 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3128 running as the user.
3131 35. There was a buffer overflow vulnerability in the SPA authentication code
3132 (which came originally from the Samba project). I have added a test to the
3133 spa_base64_to_bits() function which I hope fixes it.
3136 36. The daemon start-up calls getloadavg() while still root for those OS that
3137 need the first call to be done as root, but it missed one case: when
3138 deliver_queue_load_max is set with deliver_drop_privilege. This is
3139 necessary for the benefit of the queue runner, because there is no re-exec
3140 when deliver_drop_privilege is set.
3142 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3143 was in use, was not putting the data itself into the right store pool;
3144 consequently, it could be overwritten for a subsequent message in the same
3145 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3148 38. Sometimes the final signoff response after QUIT could fail to get
3149 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3150 < 0 before doing a fflush(). This bug looks as though it goes back to the
3151 introduction of TLS in release 3.20, but "sometimes" must have been rare
3152 because the tests only now provoked it.
3158 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3159 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3160 Now it returns an integer. A number of calls were still expecting a T/F
3161 return. Fortuitously, in all cases, the tests worked in OK situations,
3162 which is the norm. However, things would have gone wrong on any write
3163 failures on the smtp file descriptor. This function is used when sending
3164 messages over SMTP and also when doing verify callouts.
3166 2. When Exim is called to do synchronous delivery of a locally submitted
3167 message (the -odf or -odi options), it no longer closes stderr before doing
3170 3. Implemented the mua_wrapper option.
3172 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3174 5. Implemented the functions header_remove(), header_testname(),
3175 header_add_at_position(), and receive_remove_recipient(), and exported them
3178 6. If an ACL "warn" statement specified the addition of headers, Exim already
3179 inserted X-ACL-Warn: at the start if there was no header name. However, it
3180 was not making this test for the second and subsequent header lines if
3181 there were newlines in the string. This meant that an invalid header could
3182 be inserted if Exim was badly configured.
3184 7. Allow an ACL "warn" statement to add header lines at the start or after all
3185 the Received: headers, as well as at the end.
3187 8. Added the rcpt_4xx retry error code.
3189 9. Added postmaster_mailfrom=xxx to callout verification option.
3191 10. Added mailfrom=xxxx to the callout verification option, for verify=
3194 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3195 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3197 12. Inserted some casts to stop certain compilers warning when using pointer
3198 differences as field lengths or precisions in printf-type calls (mostly
3199 affecting debugging statements).
3201 13. Added optional readline() support for -be (dynamically loaded).
3203 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3204 same clock tick as a message's arrival, so that its received time was the
3205 same as the "first fail" time on the retry record, and that message
3206 remained on the queue past the ultimate address timeout, every queue runner
3207 would try a delivery (because it was past the ultimate address timeout) but
3208 after another failure, the ultimate address timeout, which should have then
3209 bounced the address, did not kick in. This was a "< instead of <=" error;
3210 in most cases the first failure would have been in the next clock tick
3211 after the received time, and all would be well.
3213 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3214 being recognized when the domain list was tested by the match_domain
3215 condition in an expansion string.
3217 16. Added the ${str2b64: operator.
3219 17. Exim was always calling setrlimit() to set a large limit for the number of
3220 processes, without checking whether the existing limit was already
3221 adequate. (It did check for the limit on file descriptors.) Furthermore,
3222 errors from getrlimit() and setrlimit() were being ignored. Now they are
3223 logged to the main and panic logs, but Exim does carry on, to try to do its
3224 job under whatever limits there are.
3226 18. Imported PCRE 5.0.
3228 19. Trivial typo in log message " temporarily refused connection" (the leading
3231 20. If the log selector return_path_on_delivery was set and an address was
3232 redirected to /dev/null, the delivery process crashed because it assumed
3233 that a return path would always be set for a "successful" delivery. In this
3234 case, the whole delivery is bypassed as an optimization, and therefore no
3237 21. Internal re-arrangement: the function for sending a challenge and reading
3238 a response while authentication was assuming a zero-terminated challenge
3239 string. It's now changed to take a pointer and a length, to allow for
3240 binary data in such strings.
3242 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3244 23. Exim was not respecting finduser_retries when seeking the login of the
3245 uid under which it was called; it was always trying 10 times. (The default
3246 setting of finduser_retries is zero.) Also, it was sleeping after the final
3247 failure, which is pointless.
3249 24. Implemented tls_on_connect_ports.
3251 25. Implemented acl_smtp_predata.
3253 26. If the domain in control=submission is set empty, Exim assumes that the
3254 authenticated id is a complete email address when it generates From: or
3255 Sender: header lines.
3257 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3258 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3259 chown and chgrp in /bin and hostname in /usr/bin.
3261 28. Exim was keeping the "process log" file open after each use, just as it
3262 does for the main log. This opens the possibility of it remaining open for
3263 long periods when the USR1 signal hits a daemon. Occasional processlog
3264 errors were reported, that could have been caused by this. Anyway, it seems
3265 much more sensible not to leave this file open at all, so that is what now
3268 29. The long-running daemon process does not normally write to the log once it
3269 has entered its main loop, and it closes the log before doing so. This is
3270 so that log files can straightforwardly be renamed and moved. However,
3271 there are a couple of unusual error situations where the daemon does write
3272 log entries, and I had neglected to close the log afterwards.
3274 30. The text of an SMTP error response that was received during a remote
3275 delivery was being truncated at 512 bytes. This is too short for some of
3276 the long messages that one sometimes sees. I've increased the limit to
3279 31. It is now possible to make retry rules that apply only when a message has a
3280 specific sender, in particular, an empty sender.
3282 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3283 it possible to be selective about when SMTP synchronization is enforced.
3285 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3287 32. Implemented hosts_connection_nolog.
3289 33. Added an ACL for QUIT.
3291 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3294 35. Added mailbox_size and mailbox_filecount to appendfile.
3296 36. Added control = no_multiline_responses to ACLs.
3298 37. There was a bug in the logic of the code that waits for the clock to tick
3299 in the case where the clock went backwards by a substantial amount such
3300 that the microsecond fraction of "now" was more than the microsecond
3301 fraction of "then" (but the whole seconds number was less).
3303 38. Added support for the libradius Radius client library this is found on
3304 FreeBSD (previously only the radiusclient library was supported).
3310 1. When certain lookups returned multiple values in the form name=value, the
3311 quoting of the values was not always being done properly. Specifically:
3312 (a) If the value started with a double quote, but contained no whitespace,
3314 (b) If the value contained whitespace other than a space character (i.e.
3315 tabs or newlines or carriage returns) it was not quoted.
3316 This fix has been applied to the mysql and pgsql lookups by writing a
3317 separate quoting function and calling it from the lookup code. The fix
3318 should probably also be applied to nisplus, ibase and oracle lookups, but
3319 since I cannot test any of those, I have not disturbed their existing code.
3321 2. A hit in the callout cache for a specific address caused a log line with no
3322 reason for rejecting RCPT. Now it says "Previous (cached) callout
3323 verification failure".
3325 3. There was an off-by-one bug in the queryprogram router. An over-long
3326 return line was truncated at 256 instead of 255 characters, thereby
3327 overflowing its buffer with the terminating zero. As well as fixing this, I
3328 have increased the buffer size to 1024 (and made a note to document this).
3330 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3331 when Exim is waiting for an SMTP response from a remote server, Exim
3332 restarts its select() call on the socket, thereby resetting its timeout.
3333 This is not a problem when such interrupts are rare. Somebody set up a cron
3334 job to run exiwhat every 2 minutes, which is less than the normal select()
3335 timeout (5 or 10 minutes). This meant that the select() timeout never
3336 kicked in because it was always reset. I have fixed this by comparing the
3337 time when an interrupt arrives with the time at the start of the first call
3338 to select(). If more time than the timeout has elapsed, the interrupt is
3339 treated as a timeout.
3341 5. Some internal re-factoring in preparation for the addition of Sieve
3342 extensions (by MH). In particular, the "personal" test is moved to a
3343 separate function, and given an option for scanning Cc: and Bcc: (which is
3344 not set for Exim filters).
3346 6. When Exim created an email address using the login of the caller as the
3347 local part (e.g. when creating a From: or Sender: header line), it was not
3348 quoting the local part when it contained special characters such as @.
3350 7. Installed new OpenBSD configuration files.
3352 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3353 try to make them clearer.
3355 9. Callout options, other than the timeout value, were being ignored when
3356 verifying sender addresses in header lines. For example, when using
3358 verify = header_sender/callout=no_cache
3360 the cache was (incorrectly) being used.
3362 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3363 only the Cygwin environment.
3365 11. When return_path_on_delivery was set as a log selector, if different remote
3366 addresses in the same message used different return paths and parallel
3367 remote delivery occurred, the wrong values would sometimes be logged.
3368 (Whenever a remote delivery process finished, the return path value from
3369 the most recently started remote delivery process was logged.)
3371 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3372 lines when AUTH and/or TLS are in use. This is the "received protocol"
3373 field. Exim used to use "asmtp" for authenticated SMTP, without any
3374 indication (in the protocol name) for TLS use. Now it follows the RFC and
3375 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3376 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3377 names appear in log lines as well as in Received: header lines.
3379 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3380 extensions, and comparison tests, and to fix some bugs.
3382 14. Changes to the "personal" filter test:
3384 (1) The test was buggy in that it was just doing the equivalent of
3385 "contains" tests on header lines. For example, if a user's address was
3386 anne@some.where, the "personal" test would incorrectly be true for
3388 To: susanne@some.where
3390 This test is now done by extracting each address from the header in turn,
3391 and checking the entire address. Other tests that are part of "personal"
3392 are now done using regular expressions (for example, to check local parts
3393 of addresses in From: header lines).
3395 (2) The list of non-personal local parts in From: addresses has been
3396 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3397 taken from the Sieve specification recommendations.
3399 (3) If the message contains any header line starting with "List-" it is
3400 treated as non-personal.
3402 (4) The test for "circular" in the Subject: header line has been removed
3403 because it now seems ill-conceived.
3405 15. Minor typos in src/EDITME comments corrected.
3407 16. Installed latest exipick from John Jetmore.
3409 17. If headers_add on a router specified a text string that was too long for
3410 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3411 of string_sprintf() is now avoided.
3413 18. $message_body_size was not set (it was always zero) when running the DATA
3414 ACL and the local_scan() function.
3416 19. For the "mail" command in an Exim filter, no default was being set for
3417 the once_repeat time, causing a random time value to be used if "once" was
3418 specified. (If the value happened to be <= 0, no repeat happened.) The
3419 default is now 0s, meaning "never repeat". The "vacation" command was OK
3420 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3421 (I found it when inspecting the code).
3423 20. There is now an overall timeout for performing a callout verification. It
3424 defaults to 4 times the callout timeout, which applies to individual SMTP
3425 commands during the callout. The overall timeout applies when there is more
3426 than one host that can be tried. The timeout is checked before trying the
3427 next host. This prevents very long delays if there are a large number of
3428 hosts and all are timing out (e.g. when the network connections are timing
3429 out). The value of the overall timeout can be changed by specifying an
3430 additional sub-option for "callout", called "maxwait". For example:
3432 verify = sender/callout=5s,maxwait=20s
3434 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3435 to the end before writing, but this should make it even safer).
3437 22. Exim was forgetting that it had advertised PIPELINING for the second and
3438 subsequent messages on an SMTP connection. It was also not resetting its
3439 memory on STARTTLS and an internal HELO.
3441 23. When Exim logs an SMTP synchronization error within a session, it now
3442 records whether PIPELINING has been advertised or not.
3444 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3445 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3446 rather than long int.
3448 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3450 26. Added the never_mail option to autoreply.
3456 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3457 crash if the getsockname() call failed; this can happen if a connection is
3458 closed very soon after it is established. The problem was simply in the
3459 order in which certain operations were done, causing Exim to try to write
3460 to the SMTP stream before it had set up the file descriptor. The bug has
3461 been fixed by making things happen in the correct order.
3467 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3468 before the connection was closed, thus losing the rejection response.
3470 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3471 some early Solaris releases, but causes trouble in current releases where
3472 socklen_t is defined.
3474 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3477 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3480 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3481 that releasing the top of it at the end releases what was used for sub-
3482 expansions (unless the block got too big). However, discard this block if
3483 the first thing is a variable or header, so that we can use its block when
3484 it is dynamic (useful for very large $message_headers, for example).
3486 6. Lookups now cache *every* query, not just the most recent. A new, separate
3487 store pool is used for this. It can be recovered when all lookup caches are
3488 flushed. Lookups now release memory at the end of their result strings.
3489 This has involved some general refactoring of the lookup sources.
3491 7. Some code has been added to the store_xxx() functions to reduce the amount
3492 of flapping under certain conditions.
3494 8. log_incoming_interface used to affect only the <= reception log lines. Now
3495 it causes the local interface and port to be added to several more SMTP log
3496 lines, for example "SMTP connection from", and rejection lines.
3498 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3500 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3502 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3503 could be overwritten at the end of the current message (or the start of a
3504 new message if it was set in a HELO ACL). The value is now preserved for
3505 the duration of the SMTP connection.
3507 12. If a transport had a headers_rewrite setting, and a matching header line
3508 contained an unqualified address, that address was qualified, even if it
3509 did not match any rewriting rules. The underlying bug was that the values
3510 of the flags that permit the existence of unqualified sender and recipient
3511 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3512 non-local messages, and by -bnq for local messages) were not being
3513 preserved with the message after it was received.
3515 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3516 "next input=" as part of the text comprising the host identity instead of
3517 the correct text. The code was using the same buffer for two different
3518 strings. However, depending on which order the printing function evaluated
3519 its arguments, the bug did not always show up. Under Linux, for example, my
3520 test suite worked just fine.
3522 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3523 doesn't work with some older versions of Perl. It has been changed to "my",
3524 which in any case is probably the better facility to use.
3526 15. A really picky compiler found some instances of statements for creating
3527 error messages that either had too many or two few arguments for the format
3530 16. The size of the buffer for calls to the DNS resolver has been increased
3531 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3532 for addresses that have a lot of PTR records. This alleviates a problem; it
3533 does not fully solve it.
3535 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3536 buffer now truncates the list and logs the incident, which is the same
3537 action as happens when Exim is looking up a host name and its aliases.
3538 Previously in this situation something unpredictable would happen;
3539 sometimes it was "internal error: store_reset failed".
3541 18. If a server dropped the connection unexpectedly when an Exim client was
3542 using GnuTLS and trying to read a response, the client delivery process
3543 crashed while trying to generate an error log message.
3545 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3546 string, for example:
3548 warn message = H1: something\nH2: something
3550 the text was added as a single header line from Exim's point of view
3551 though it ended up OK in the delivered message. However, searching for the
3552 second and subsequent header lines using $h_h2: did not work. This has been
3553 fixed. Similarly, if a system filter added multiple headers in this way,
3554 the routers could not see them.
3556 20. Expanded the error message when iplsearch is called with an invalid key to
3557 suggest using net-iplsearch in a host list.
3559 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3560 ACLs are no longer actually imposed (and a message to that effect is
3563 22. If a "gecos" field in a passwd entry contained escaped characters, in
3564 particular, if it contained a \" sequence, Exim got it wrong when building
3565 a From: or a Sender: header from that name. A second bug also caused
3566 incorrect handling when an unquoted " was present following a character
3567 that needed quoting.
3569 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3570 was not being matched caselessly.
3572 24. Arranged for all hyphens in the exim.8 source to be escaped with
3575 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3576 properly. Recipient callout cache records were still being keyed to include
3577 the sender, even when use_sender was set false. This led to far more
3578 callouts that were necessary. The sender is no longer included in the key
3579 when use_sender is false.
3581 26. Added "control = submission" modifier to ACLs.
3583 27. Added the ${base62d: operator to decode base 62 numbers.
3585 28. dnsdb lookups can now access SRV records.
3587 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3588 the configuration file.
3590 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3591 (-v) mode. This makes the output for a verbose queue run more intelligible.
3593 31. Added a use_postmaster feature to recipient callouts.
3595 32. Added the $body_zerocount variable, containing the number of binary zero
3596 bytes in the message body.
3598 33. The time of last modification of the "new" subdirectory is now used as the
3599 "mailbox time last read" when there is a quota error for a maildir
3602 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3604 35. Added +ignore_unknown as a special item in host lists.
3606 36. Code for decoding IPv6 addresses in host lists is now included, even if
3607 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3608 address was recognized as an IP address, but was then not correctly decoded
3609 into binary, causing unexpected and incorrect effects when compared with
3616 1. Very minor rewording of debugging text in manualroute to say "list of
3617 hosts" instead of "hostlist".
3619 2. If verify=header_syntax was set, and a header line with an unqualified
3620 address (no domain) and a large number of spaces between the end of the
3621 name and the colon was received, the reception process suffered a buffer
3622 overflow, and (when I tested it) crashed. This was caused by some obsolete
3623 code that should have been removed. The fix is to remove it!
3625 3. When running in the test harness, delay a bit after writing a bounce
3626 message to get a bit more predictability in the log output.
3628 4. Added a call to search_tidyup() just before forking a reception process. In
3629 theory, someone could use a lookup in the expansion of smtp_accept_max_
3630 per_host which, without the tidyup, could leave open a database connection.
3632 5. Added the variables $recipient_data and $sender_data which get set from a
3633 lookup success in an ACL "recipients" or "senders" condition, or a router
3634 "senders" option, similar to $domain_data and $local_part_data.
3636 6. Moved the writing of debug_print from before to after the "senders" test
3639 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3640 problems for message scanning, either using a data ACL, or using
3641 local_scan() because the Received: header was not generated till after they
3642 were called (in order to set the time as the time of reception completion).
3643 I have revised the way this works. The header is now generated after the
3644 body is received, but before the ACL or local_scan() are called. After they
3645 are run, the timestamp in the header is updated.
3651 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3652 before starting a queue runner without re-exec. This happened only when
3653 deliver_drop_privilege was set or when the Exim user was set to root. The
3654 effect of the bug was that timeouts during subsequent deliveries caused
3655 crashes instead of being properly handled. The handler is now left at its
3656 default (and expected) setting.
3658 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3659 message, again when deliver_drop_privilege is set or Exim is run as root.
3660 The bug described in (1) was not present in this case, but the tidying up
3661 of the other signals was missing. I have made the two cases consistent.
3663 3. The ignore_target_hosts setting on a manualroute router was being ignored
3664 for hosts that were looked up using the /MX notation.
3666 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3669 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3670 operated on the sender address. After changing the $sender_address to <>
3671 for the sender address verify, Exim was re-instated it as the original
3672 (before rewriting) address, but remembering that it had rewritten it, so it
3673 wasn't rewriting it again. This bug also had the effect of breaking the
3674 sender address verification caching when the sender address was rewritten.
3676 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3677 This has been changed so that if the ip literal address matches
3678 ignore_target_hosts, the router declines.
3680 7. Added expansion conditions match_domain, match_address, and match_local_
3681 part (NOT match_host).
3683 8. The placeholder for the Received: header didn't have a length field set.
3685 9. Added code to Exim itself and to exim_lock to test for a specific race
3686 condition that could lead to file corruption when using MBX delivery. The
3687 issue is with the lockfile that is created in /tmp. If this file is removed
3688 after a process has opened it but before that process has acquired a lock,
3689 there is the potential for a second process to recreate the file and also
3690 acquire a lock. This could lead to two Exim processes writing to the file
3691 at the same time. The added code performs the same test as UW imapd; it
3692 checks after acquiring the lock that its file descriptor still refers to
3693 the same named file.
3695 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3696 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3699 11. Added the smtp_active_hostname option. If used, this will typically be made
3700 to depend on the incoming interface address. Because $interface_address is
3701 not set up until the daemon has forked a reception process, error responses
3702 that can happen earlier (such as "too many connections") no longer contain
3705 12. If an expansion in a condition on a "warn" statement fails because a lookup
3706 defers, the "warn" statement is abandoned, and the next ACL statement is
3707 processed. Previously this caused the whole ACL to be aborted.
3709 13. Added the iplsearch lookup type.
3711 14. Added ident_timeout as a log selector.
3713 15. Added tls_certificate_verified as a log selector.
3715 16. Added a global option tls_require_ciphers (compare the smtp transport
3716 option of the same name). This controls incoming TLS connections.
3718 17. I finally figured out how to make tls_require_ciphers do a similar thing
3719 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3720 before starting the TLS session.
3722 18. Tabs are now shown as \t in -bP output.
3724 19. If the log selector return_path_on_delivery was set, Exim crashed when
3725 bouncing a message because it had too many Received: header lines.
3727 20. If two routers both had headers_remove settings, and the first one included
3728 a superfluous trailing colon, the final name in the first list and the
3729 first name in the second list were incorrectly joined into one item (with a
3730 colon in the middle).
3736 1. Added -C and -D options to the exinext utility, mainly to make it easier
3737 to include in the automated testing, but these could be helpful when
3738 multiple configurations are in use.
3740 2. The exinext utility was not formatting the output nicely when there was
3741 an alternate port involved in the retry record key, nor when there was a
3742 message id as well (for retries that were specific to a specific message
3743 and a specific host). It was also confused by IPv6 addresses, because of
3744 the additional colons they contain. I have fixed the IPv4 problem, and
3745 patched it up to do a reasonable job for IPv6.
3747 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3748 delivery, the log line now contains "pipelined" if PIPELINING was used.
3750 4. An SMTP transport process used to panic and die if the bind() call to set
3751 an explicit outgoing interface failed. This has been changed; it is now
3752 treated in the same way as a connect() failure.
3754 5. A reference to $sender_host_name in the part of a conditional expansion
3755 that was being skipped was still causing a DNS lookup. This no longer
3758 6. The def: expansion condition was not recognizing references to header lines
3759 that used bh_ and bheader_.
3761 7. Added the _cache feature to named lists.
3763 8. The code for checking quota_filecount in the appendfile transport was
3764 allowing one more file than it should have been.
3766 9. For compatibility with Sendmail, the command line option
3774 and sets the incoming protocol and host name (for trusted callers). The
3775 host name and its colon can be omitted when only the protocol is to be set.
3776 Note the Exim already has two private options, -pd and -ps, that refer to
3777 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3778 "s", but I don't think that's a major issue.
3780 10. A number of refactoring changes to the code, none of which should affect
3783 (a) The number of logging options was getting close to filling up the
3784 32-bit word that was used as a bit map. I have split them into two classes:
3785 those that are passed in the argument to log_write(), and those that are
3786 only ever tested independently outside of that function. These are now in
3787 separate 32-bit words, so there is plenty of room for expansion again.
3788 There is no change in the user interface or the logging behaviour.
3790 (b) When building, for example, log lines, the code previously used a
3791 macro that called string_cat() twice, in order to add two strings. This is
3792 not really sufficiently general. Furthermore, there was one instance where
3793 it was actually wrong because one of the argument was used twice, and in
3794 one call a function was used. (As it happened, calling the function twice
3795 did not affect the overall behaviour.) The macro has been replaced by a
3796 function that can join an arbitrary number of extra strings onto a growing
3799 (c) The code for expansion conditions now uses a table and a binary chop
3800 instead of a serial search (which was left over from when there were very
3801 few conditions). Also, it now recognizes conditions like "pam" even when
3802 the relevant support is not compiled in: a suitably worded error message is
3803 given if an attempt is made to use such a condition.
3805 11. Added ${time_interval:xxxxx}.
3807 12. A bug was causing one of the ddress fields not to be passed back correctly
3808 from remote delivery subprocesses. The field in question was not being
3809 subsequently used, so this caused to problems in practice.
3811 13. Added new log selectors queue_time and deliver_time.
3813 14. Might have fixed a bug in maildirsizefile handling that threw up
3814 "unexpected character" debug warnings, and recalculated the data
3815 unnecessarily. In any case, I expanded the warning message to give more
3818 15. Added the message "Restricted characters in address" to the statements in
3819 the default ACL that block characters like @ and % in local parts.
3821 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3822 Three changes have been made:
3824 (a) There was a serious bug; a negative response to MAIL caused the whole
3825 recipient domain to be cached as invalid, thereby blocking all messages
3826 to all local parts at the same domain, from all senders. This bug has
3827 been fixed. The domain is no longer cached after a negative response to
3828 MAIL if the sender used is not empty.
3830 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3833 (c) A new callout option, "use_sender" has been added for people who want
3834 the modified behaviour.
3840 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3843 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3844 indeed breaks things for older releases.
3846 3. Added additional logging to the case where there is a problem reading data
3847 from a filter that is running in a subprocess using a pipe, in order to
3848 try to track down a specific problem.
3850 4. Testing facility fudge: when running in the test harness and attempting
3851 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3852 getting "No route to host". Convert this to a timeout.
3854 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3857 6. Some OS don't have socklen_t but use size_t instead. This affects the
3858 fifth argument of getsockopt() amongst other things. This is now
3859 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3860 can be set for individual OS. I have set it for SunOS5, OSF1, and
3861 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3862 some earlier ones do not.
3864 7. Change 4.30/15 was not doing the test caselessly.
3866 8. The standard form for an IPv6 address literal was being rejected by address
3867 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3868 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3869 this, as well as the form without the "IPv6" on the front (but only when
3870 address literals are enabled, of course).
3872 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3874 10. Exim crashed if a message with an empty sender address specified by -f
3875 encountered a router with an errors_to setting. This could be provoked only
3876 by a command such as
3880 where an empty string was supplied; "<>" did not hit this bug.
3882 11. Installed PCRE release 4.5.
3884 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3885 remained set. It is now erased.
3887 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3888 times from message ids (which are base 36 rather than the normal 62).
3890 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3891 were being counted as actual protocol errors, and logged if the log
3892 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3893 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3894 and DATA following a set of rejected RCPTs do not count as protocol errors.
3895 In other words, Exim assumes they were pipelined, though this may not
3896 actually be the case. Of course, in all cases the client gets an
3897 appropriate error code.
3899 15. If a lookup fails in an ACL condition, a message about the failure may
3900 be available; it is used if testing the ACL cannot continue, because most
3901 such messages specify what the cause of the deferral is. However, some
3902 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3903 that caused an old message to be retained and used if a later statement
3904 caused a defer, replacing the real cause of the deferral.
3906 16. If an IP address had so many PTR records that the DNS lookup buffer
3907 was not large enough to hold them, Exim could crash while trying to process
3908 the truncated data. It now detects and logs this case.
3910 17. Further to 4.21/58, another change has been made: if (and only if) the
3911 first line of a message (the first header line) ends with CRLF, a bare LF
3912 in a subsequent header line has a space inserted after it, so as not to
3913 terminate the header.
3915 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3916 unnecessarily, used atoi() instead of strtol(), and didn't check the
3917 termination when getting file sizes from file names by regex.
3919 19. Completely re-implemented the support for maildirsize files, in the light
3920 of a number of problems with the previous contributed implementation
3921 (4.30/29). In particular:
3923 . If the quota is zero, the maildirsize file is maintained, but no quota is
3926 . If the maildir directory does not exist, it is created before any attempt
3927 to write a maildirsize file.
3929 . The quota value in the file is just a cache; if the quota is changed in
3930 the transport, the new value overrides.
3932 . A regular expression is available for excluding directories from the
3935 20. The autoreply transport checks the characters in options that define the
3936 message's headers; it allows continued headers, but it was checking with
3937 isspace() after an embedded newline instead of explicitly looking for a
3940 21. If all the "regular" hosts to which an address was routed had passed their
3941 expiry times, and had not reached their retry times, the address was
3942 bounced, even if fallback hosts were defined. Now Exim should go on to try
3945 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3946 equivalent code in the SMTP transport. Some hosts send humungous responses
3947 to HELO/EHLO, more than 1024 it seems.
3949 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3950 gives compiler warnings in some environments. I've now done it "properly",
3953 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3954 (because of problems with the built-in one) was declared to return uschar *
3955 instead of char *, causing compiler failure.
3957 25. Fixed a file descriptor leak when processing alias/forward files.
3959 26. Fixed a minor format string issue in dbfn.c.
3961 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3963 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3964 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3967 29. When a sender address is verified, it is cached, to save repeating the test
3968 when there is more than one recipient in a message. However, when the
3969 verification involves a callout, it is possible for different callout
3970 options to be set for different recipients. It is too complicated to keep
3971 track of this in the cache, so now Exim always runs a verification when a
3972 callout is required, relying on the callout cache for the optimization.
3973 The overhead is duplication of the address routing, but this should not be
3976 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3977 to be verified with callout=postmaster, and the main callout worked but the
3978 postmaster check failed, the verification correctly failed. However, if a
3979 subsequent RCPT command asked for sender verification *without* the
3980 postmaster check, incorrect caching caused this verification also to fail,
3983 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3984 it was not caching the DNS options (qualify_single, search_parents) that
3985 were used when the lookup failed. A subsequent lookup with different
3986 options therefore always gave the same answer, though there were cases
3987 where it should not have. (Example: a "domains = !$mx_any" option on a
3988 dnslookup router: the "domains" option is always processed without any
3989 widening, but the router might have qualify_single set.) Now Exim uses the
3990 cached value only when the same options are set.
3992 32. Added John Jetmore's "exipick" utility to the distribution.
3994 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3995 than a timeout (e.g. a certificate is required, and is not provided), an
3996 Exim server now closes the connection immediately. Previously it waited for
3997 the client to close - but if the client is SSL, it seems that they each
3998 wait for each other, leading to a delay before one of them times out.
4000 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4001 maintained 0.8.x compatibility because I don't think many are using it, and
4002 it is clearly obsolete.
4004 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4007 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4008 client certificate was expired. A simple patch fixes this, though I don't
4009 understand the full logic of why the verify callback is called multiple
4012 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4013 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4014 which causes problems with some clients (such as the Certicom SSL Plus
4015 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4016 disables the coutermeasure allowing Eudora to connect."
4018 38. Exim was not checking that a write() to a log file succeeded. This could
4019 lead to Bad Things if a log got too big, in particular if it hit a file
4020 size limit. Exim now panics and dies if it cannot write to a log file, just
4021 as it does if it cannot open a log file.
4023 39. Modified OS/Makefile-Linux so that it now contains
4025 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4027 The two -D definitions ensure that Exim is compiled with large file
4028 support, which makes it possible to handle log files that are bigger than
4031 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4032 instance) a domain was checked against a named list that involved a lookup,
4033 causing $domain_data to be set, then another domain was checked against the
4034 same list, then the first domain was re-checked, the value of $domain_data
4035 after the final check could be wrong. In particular, if the second check
4036 failed, it could be set empty. This bug probably also applied to
4039 41. The strip_trailing_dot option was not being applied to the address given
4040 with the -f command-line option.
4042 42. The code for reading a message's header from the spool was incrementing
4043 $received_count, but never initializing it. This meant that the value was
4044 incorrect (doubled) while delivering a message in the same process in which
4045 it was received. In the most common configuration of Exim, this never
4046 happens - a fresh exec is done - but it can happen when
4047 deliver_drop_privilege is set.
4049 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4050 it now includes up to 150 characters of the unexpected data in the log
4053 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4054 and building data strings. The size of both of these buffers was 10 000
4055 bytes - far larger than anybody would *ever* want, thought I. Needless to
4056 say, somebody hit the limit. I have increased the maximum line length to
4057 20 000 and the maximum data length of concatenated lines to 100 000. I have
4058 also fixed two bugs, because there was no checking on these buffers. Tsk,
4059 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4060 buffer is too small.
4062 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4063 lsearch lookups. Now it does.
4065 46. When parsing a route_list item in a manualroute router, a fixed-length
4066 buffer was used for the list of hosts. I made this 1024 bytes long,
4067 thinking that nobody would ever have a list of hosts that long. Wrong.
4068 Somebody had a whole pile of complicated expansion conditions, and the
4069 string was silently truncated, leading to an expansion error. It turns out
4070 that it is easier to change to an unlimited length (owing to other changes
4071 that have happened since this code was originally written) than to build
4072 structure for giving a limitation error. The length of the item that
4073 expands into the list of hosts is now unlimited.
4075 47. The lsearch lookup could not handle data where the length of text line was
4076 more than 4095 characters. Such lines were truncated, leading to shortened
4077 data being returned. It should now handle lines of any length.
4079 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4080 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4083 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4084 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4085 no longer happens in comment lines. A list of replacements is now placed
4086 at the head of all of the source files, except those whose only change is
4087 to replace PERL_COMMAND in the very first #! line.
4089 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4090 messages on the queue, with a bottom-up merge sort, using code contributed
4091 by Michael Haardt. This should make operations like -bp somewhat faster on
4092 large queues. It won't affect queue runners, except when queue_run_in_order
4095 51. Installed eximstats 1.31 in the distribution.
4097 52. Added support for SRV lookups to the dnslookup router.
4099 53. If an ACL referred to $message_body or $message_body_end, the value was not
4100 reset for any messages that followed in the same SMTP session.
4102 54. The store-handling optimization for building very long strings was not
4103 differentiating between the different store pools. I don't think this
4104 actually made any difference in practice, but I've tidied it.
4106 55. While running the routers to verify a sender address, $sender_address
4107 was still set to the sender address. This is wrong, because when routing to
4108 send a bounce to the sender, it would be empty. Therefore, I have changed
4109 it so that, while verifying a sender address, $sender_address is set to <>.
4110 (There is no change to what happens when verifying a recipient address.)
4112 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4113 target A or AAAA records (if not already returned) without resetting the
4114 qualify_single or search_parents options of the DNS resolver. These are
4115 inappropriate in this case because the targets of MX and SRV records must
4116 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4117 target that, when qualified, matched something in the local domain. These
4118 two options are now turned off when doing these lookups.
4120 57. It seems that at least some releases of Reiserfs (which does not have the
4121 concept of a fixed number of inodes) returns zero and not -1 for the
4122 number of available inodes. This interacted badly with check_spool_inodes,
4123 which assumed that -1 was the "no such thing" setting. What I have done is
4124 to check that the total number of inodes is greater than zero before doing
4125 the test of how many are available.
4127 58. When a "warn" ACL statement has a log_message modifier, the message is
4128 remembered, and not repeated. This is to avoid a lot of repetition when a
4129 message has many recipients that cause the same warning to be written.
4130 Howewer, Exim was preserving the list of already written lines for an
4131 entire SMTP session, which doesn't seem right. The memory is now reset if a
4132 new message is started.
4134 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4135 debugging output unless log_rewrite was also set.
4137 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4138 of (int)(handle) when we know that handle contains (void *)(-1).
4140 61. The Exim daemon panic-logs an error return when it closes the incoming
4141 connection. However "connection reset by peer" seems to be common, and
4142 isn't really an error worthy of noting specially, so that particular error
4145 62. When Exim is trying to find all the local interfaces, it used to panic and
4146 die if the ioctl to get the interface flags failed. However, it seems that
4147 on at least one OS (Solaris 9) it is possible to have an interface that is
4148 included in the list of interfaces, but for which you get a failure error
4149 for this call. This happens when the interface is not "plumbed" into a
4150 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4151 failure of the "get flags" call assumes that the interface is down.
4153 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4154 makes life easier for people who are doing arithmetic on fields extracted
4155 from dates, where you often get leading zeros that should not be
4156 interpreted as octal.
4158 64. Added qualify_domain to the redirect router, to override the global
4161 65. If a pathologically long header line contained very many addresses (the
4162 report of this problem mentioned 10 000) and each of them was rewritten,
4163 Exim could use up a very large amount of memory. (It kept on making new
4164 copies of the header line as it rewrote, and never released the old ones.)
4165 At the expense of a bit more processing, the header rewriting function has
4166 been changed so that it no longer eats memory in this way.
4168 66. The generation of the Received: header has been moved from the time that a
4169 message starts to be received, to the time that it finishes. The timestamp
4170 in the Received: header should now be very close to that of the <= log
4171 line. There are two side-effects of this change:
4173 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4174 logged header lines no longer include the local Received: line, because
4175 it has not yet been created. The same applies to a copy of the message
4176 that is returned to a non-SMTP sender when a message is rejected.
4178 (b) When a filter file is tested using -bf, no additional Received: header
4179 is added to the test message. After some thought, I decided that this
4182 This change does not affect the value of $received_for. It is still set
4183 after address rewriting, but before local_scan() is called.
4185 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4187 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4188 gave an unhelpful panic error message, and a defer error. I have managed to
4189 change this behaviour so that it now rejects any supplied certificate,
4190 which seems right, as the list of acceptable certificates is empty.
4192 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4193 gave an unhelpful defer error. I have not managed to make this reject any
4194 supplied certificates, but the error message it gives is "no certificate
4195 supplied", which is not helpful.
4197 70. exigrep's output now also includes lines that are not associated with any
4198 message, but which match the given pattern. Implemented by a patch from
4199 Martin Sluka, which also tidied up the Perl a bit.
4201 71. Recipient callout verification, like sender verification, was using <> in
4202 the MAIL FROM command. This isn't really the right thing, since the actual
4203 sender may affect whether the remote host accepts the recipient or not. I
4204 have changed it to use the actual sender in the callout; this means that
4205 the cache record is now keyed on a recipient/sender pair, not just the
4206 recipient address. There doesn't seem to be a real danger of callout loops,
4207 since a callout by the remote host to check the sender would use <>.
4208 [SEE ABOVE: changed after hitting problems.]
4210 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4211 temporary errors. However, in the case of such a code being given after
4212 the end of a data transmission (i.e. after ".") Exim was failing to write
4213 a retry record for the message. (Yes, there was some broken host that was
4214 actually sending 8xx at this point.)
4216 73. An unknown lookup type in a host list could cause Exim to panic-die when
4217 the list was checked. (An example that provoked this was putting <; in the
4218 middle of a list instead of at the start.) If this happened during a DATA
4219 ACL check, a -D file could be left lying around. This kind of configuration
4220 error no longer causes Exim to die; instead it causes a defer errror. The
4221 incident is still logged to the main and panic logs.
4223 74. Buglet left over from Exim 3 conversion. The message "too many messages
4224 in one connection" was written to the rejectlog but not the mainlog, except
4225 when address rewriting (yes!) was being logged.
4227 75. Added write_rejectlog option.
4229 76. When a system filter was run not as root (that is, when system_filter_user
4230 was set), the values of the $n variables were not being returned to the
4231 main process; thus, they were not subsequently available in the $sn
4234 77. Added +return_path_on_delivery log selector.
4236 78. A connection timeout was being treated differently from recipients deferred
4237 when testing hosts_max_try with a message that was older than the host's
4238 retry timeout. (The host should not be counted, thus allowing all hosts to
4239 be tried at least once before bouncing.) This may have been the cause of an
4240 occasionally reported bug whereby a message would remain on the queue
4241 longer than the retry timeout, but would be bounced if a delivery was
4242 forced. I say "may" because I never totally pinned down the problem;
4243 setting up timeout/retry tests is difficult. See also the next item.
4245 79. The ultimate address timeout was not being applied to errors that involved
4246 a combination of host plus message (for example, a timeout on a MAIL
4247 command). When an address resolved to a number of possible hosts, and they
4248 were not all tried for each delivery (e.g. because of hosts_max_try), a
4249 message could remain on the queue longer than the retry timeout.
4251 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4254 81. Fixed an obscure SMTP outgoing bug which required at least the following
4255 conditions: (a) there was another message waiting for the same server;
4256 (b) the server returned 5xx to all RCPT commands in the first message so
4257 that the message was not completed; (c) the server dropped the connection
4258 or gave a negative response to the RSET that Exim sends to abort the
4259 transaction. The observed case was a dropped connection after DATA that had
4260 been sent in pipelining mode. That is, the server had advertised PIPELINING
4261 but was not implementing it correctly. The effect of the bug was incorrect
4262 behaviour, such as trying another host, and this could lead to a crash.
4268 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4269 and daemon.c were passed as pointers to ints; they should have been
4270 pointers to socklen_t variables (which are typically unsigned ints).
4272 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4275 3. Fixed a really odd bug that affected only the testing scheme; patching a
4276 certain fixed string in the binary changed the value of another string that
4277 happened to be identical to the end of the original first string.
4279 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4280 name", it returns that address as the IP address. On some operating
4281 systems (e.g. Solaris), it also passes back the IP address string as the
4282 "host name". However, on others (e.g. Linux), it passes back an empty
4283 string. Exim wasn't checking for this, and was changing the host name to an
4284 empty string, assuming it had been canonicized.
4286 5. Although rare, it is permitted to have more than one PTR record for a given
4287 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4288 all the names associated with an address, because they do in Solaris.
4289 However, it seems that they do not in Linux for data that comes from the
4290 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4291 I found this out when I moved to a new Linux workstation and tried to run
4292 the Exim test suite.
4294 To get round this problem I have changed the code so that it now does its
4295 own call to the DNS to look up PTR records when searching for a host name.
4296 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4297 addresses that are only in /etc/hosts are still found.
4299 This behaviour is, however, controlled by an option called host_lookup_
4300 order, which defaults to "bydns:byaddr". If people want to use the other
4301 order, or indeed, just use one or the other means of lookup, they can
4302 specify it in this variable.
4304 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4305 some operating systems, this comes back from gethostbyaddr() as an empty
4306 string, and this is what Exim used to test for. However, it seems that in
4307 other systems, "." is yielded. Exim now tests for this case too.
4309 7. The values of check_spool_space and check_log_space are now held internally
4310 as a number of kilobytes instead of an absolute number of bytes. If a
4311 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4312 kilobyte. This means that much larger values can be stored.
4314 8. Exim monitor: an attempt to get the action menu when not actually pointing
4315 at a message produces an empty menu entitled "No message selected". This
4316 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4317 no entries in it ("Shell widget menu has zero width and/or height"). So I
4318 have added a single, blank menu entry in this case.
4320 9. Added ${quote_local_part.
4322 10. MIME decoding is now applied to the contents of Subject: header lines when
4325 11. Now that a reference to $sender_host_address automatically causes a reverse
4326 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4327 host lookup before query-style lookups in lists that might use this
4328 variable. This has therefore been abolished, and the "net-" prefix is no
4329 longer necessary for query-style lookups.
4331 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4332 have been a typo for LFLAGS, so it has been changed.
4334 13. The install script calls Exim with "-C /dev/null" in order to find the
4335 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4336 to be output. Howeve, since Exim outputs its version number before the
4337 error, it didn't break the script. It just looked ugly. I fixed this by
4338 always allowing "-C /dev/null" if the caller is root.
4340 14. Ignore overlarge ACL variable number when reading spool file - insurance
4341 against a later release with more variables having written the file.
4343 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4344 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4345 this, as well as the form without the "IPv6" on the front.
4347 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4348 OS/Makefile-Darwin file.
4350 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4351 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4353 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4354 variable. However, some OS use ints for inodes. I've added cast to long int
4355 to get rid of the compiler warning.
4357 19. I had forgotten to lock out "/../" in configuration file names when
4358 ALT_CONFIG_PREFIX was set.
4360 20. Routers used for verification do not need to specify transports. However,
4361 if such a router generated a host list, and callout was configured, Exim
4362 crashed, because it could not find a port number from the (non-existent)
4363 transport. It now assumes port 25 in this circumstance.
4365 21. Added the -t option to exigrep.
4367 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4368 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4369 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4370 them is set, LOOKUP_LSEARCH is forced.
4372 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4374 24. Added sender and host information to the "rejected by local_scan()" log
4375 line; previously there was no indication of these.
4377 25. Added .include_if_exists.
4379 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4380 Linux. It turns out that not all file systems support this. Apparently some
4381 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4382 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4383 not supported on the file descriptor, is now ignored when Exim is trying to
4384 sync a directory. This applies only to Linux.
4386 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4388 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4389 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4392 29. Added support for maildirsize files from supplied patch (modified a bit).
4394 30. The use of :fail: followed by an empty string could lead Exim to respond to
4395 sender verification failures with (e.g.):
4397 550 Verification failed for <xxx>
4398 550 Sender verify failed
4400 where the first response line was missing the '-' that indicates it is not
4401 the final line of the response.
4403 31. The loop for finding the name of the user that called Exim had a hardwired
4404 limit of 10; it now uses the value of finduser_retries, which is used for
4405 all other user lookups.
4407 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4410 33. Exim was neglecting to zero errno before one call of strtol() when
4411 expanding a string and expecting an integer value. On some systems this
4412 resulted in spurious "integer overflow" errors. Also, it was casting the
4413 result into an int without checking.
4415 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4416 did not work. The code looks as if it has *never* worked, though it appears
4417 to have been documented since at least releast 1.62. I have made it work.
4419 35. The "timeout_DNS" error in retry rules, also documented since at least
4420 1.62, also never worked. As it isn't clear exactly what this means, and
4421 clearly it isn't a major issue, I have abolished the feature by treating it
4422 as "timeout", and writing a warning to the main and panic logs.
4424 36. The display of retry rules for -brt wasn't always showing the error code
4427 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4428 timeout_connect_A, timeout_connect_MX.
4430 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4431 to the empty sender.
4433 39. The daemon was not analysing the content of -oX till after it had closed
4434 stderr and disconnected from the controlling terminal. This meant that any
4435 syntax errors were only noted on the panic log, and the return code from
4436 the command was 0. By re-arranging the code a little, I've made the
4437 decoding happen first, so such errors now appear on stderr, and the return
4438 code is 1. However, the actual setting up of the sockets still happens in
4439 the disconnected process, so errors there are still only recorded on the
4442 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4443 connections (as happens on some IP stacks) was logged at start up time as
4444 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4445 it from "IPv6 and IPv4", which means that two separate sockets are being
4448 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4449 says whether AF_INET or AF_INET6 was passed as an argument.
4451 42. Exiwhat output was messed up when time zones were included in log
4454 43. Exiwhat now gives more information about the daemon's listening ports,
4455 and whether -tls-on-connect was used.
4457 44. The "port" option of the smtp transport is now expanded.
4459 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4460 silently ignored. Now an error message is written to the main and panic
4463 46. There's a new ACL modifier called "logwrite" which writes to a log file
4464 as soon as it is encountered.
4466 47. Added $local_user_uid and $local_user_gid at routing time.
4468 48. Exim crashed when trying to verify a sender address that was being
4471 49. Exim was recognizing only a space character after ".include". It now also
4472 recognizes a tab character.
4474 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4475 extracting the relevant information from the specification. The man page no
4476 longer contains scrambled data for the -d option, and I've added a section
4477 at the front about calling Exim under different names.
4479 51. Added "extra_headers" argument to the "mail" command in filter files.
4481 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4484 53. Installed eximstats 1.29.
4486 54. Added transport_filter_timeout as a generic transport option.
4488 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4489 Cc: header lines. This was required by RFC 822, but it not required by RFC
4492 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4493 incoming messages that did not have them. Now it does so only if the
4494 message originates locally, that is, if there is no associated remote host
4495 address. When Resent- header lines are present, this applies to the Resent-
4496 lines rather than the non-Resent- lines.
4498 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4499 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4501 58. Messages for configuration errors now include the name of the main
4502 configuration file - useful now that there may be more than one file in a
4503 list (.included file names were always shown).
4505 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4506 for those rare installations that do not start the daemon as root or run it
4507 setuid root. I've cut out the call to initgroups() if the daemon is not
4510 60. The Exim user and group can now be bound into the binary as text strings
4511 that are looked up at the start of Exim's processing.
4513 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4515 62. Added $mailstore_basename variable.
4517 63. Installed patch to sieve.c from Michael Haardt.
4519 64. When Exim failed to open the panic log after failing to open the main log,
4520 the original message it was trying to log was written to stderr and debug
4521 output, but if they were not available (the usual case in production), it
4522 was lost. Now it is written to syslog before the two lines that record the
4523 failures to open the logs.
4525 65. Users' Exim filters run in subprocesses under the user's uid. It is
4526 possible for a "deliver" command or an alias in a "personal" command to
4527 provoke an address rewrite. If logging of address rewriting is configured,
4528 this fails because the process is not running as root or exim. There may be
4529 a better way of dealing with this, but for the moment (because 4.30 needs
4530 to be released), I have disabled address rewrite logging when running a
4531 filter in a non-root, non-exim process.
4537 1. The buildconfig auxiliary program wasn't quoting the value set for
4538 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4539 not defined. This bug was masked in 4.22 by the effect that was fixed in
4542 2. Some messages that were rejected after a message id was allocated were
4543 shown as "incomplete" by exigrep. It no longer does this for messages that
4544 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4546 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4547 have allow_domain_literals set, the ID did not get logged in the <= line.
4548 Domain literals are now always recognized in Message-ID: header lines.
4550 4. The first argument for a ${extract expansion item is the key name or field
4551 number. Leading and trailing spaces in this item were not being ignored,
4552 causing some misleading effects.
4554 5. When deliver_drop_privilege was set, single queue runner processes started
4555 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4556 same command in the process it spins off) were not dropping privilege.
4558 6. When the daemon running as "exim" started a queue runner, it always
4559 re-executed Exim in the spun-off process. This is a waste of effort when
4560 deliver_drop_privilege is set. The new process now just calls the
4561 queue-runner function directly.
4567 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4570 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4571 ignored. Though the use of -oP was forcing the writing of a pid file, it
4572 was always written to the default place.
4574 3. If the message "no IP address found for host xxxx" is generated during
4575 incoming verification, it is now followed by identification of the incoming
4576 connection (so you can more easily find what provoked it).
4578 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4580 5. Added some features to "harden" Exim a bit more against certain attacks:
4582 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4583 be put in Local/Makefile. This is like the never_users runtime option,
4584 but it cannot be overridden. The default setting is "root".
4586 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4587 prefix string with which any file named in a -C command line option
4590 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4591 is retained for -C and -D only if the caller of Exim is root. Without
4592 it, the exim user may also use -C and -D and retain privilege.
4594 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4595 command line option is disabled.
4597 6. Macro names set by the -D option must start with an upper case letter, just
4598 like macro names defined in the configuration file.
4600 7. Added "dereference=" facility to LDAP.
4602 8. Two instances of the typo "uknown" in the source files are fixed.
4604 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4605 the Configure-Makefile script screwed up while processing it.
4607 10. Incorporated PCRE 4.4.
4609 11. The SMTP synchronization check was not operating right at the start of an
4610 SMTP session. For example, it could not catch a HELO sent before the client
4611 waited for the greeting. There is now a check for outstanding input at the
4612 point when the greeting is written. Because of the duplex, asynchronous
4613 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4614 way, but not yet received, when the check is performed.
4616 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4617 on TCP/IP sockets, because this apparently causes some broken clients to
4620 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4621 unchanged) from the Cygwin maintainer.
4623 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4624 was supported instead of testing for mbx. Effectively a typo.
4626 15. The spa authenticator server code was not checking that the input it
4627 received was valid base64.
4629 16. The debug output line for the "set" modifier in ACLs was not showing the
4630 name of the variable that was being set.
4632 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4634 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4635 lookup on its own. Something else was needed to trigger the lookup. For
4636 example, a match in host_lookup or the need for a host name in a host list.
4637 Now, if $sender_host_name is referenced and the host name has not yet been
4638 looked up, a lookup is performed. If the lookup fails, the variable remains
4639 empty, and $host_lookup_failed is set to "1".
4641 19. Added "eqi" as a case-independent comparison operator.
4643 20. The saslauthd authentication condition could segfault if neither service
4644 nor realm was specified.
4646 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4647 error message that was logged was misleading, and incoming SMTP
4648 connections were dropped. The message is now more accurate, and temporary
4649 errors are given to SMTP connections.
4651 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4652 (except RSET) with a 421 error, until QUIT is received. However, it was
4653 failing to send a response to QUIT.
4655 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4656 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4657 ACL is now run after the helo_try_verify_hosts code.
4659 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4660 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4661 case-independent, so other case variants are also recognized). Apparently
4662 some systems use these upper case variants.
4664 25. If more than two messages were waiting for the same host, and a transport
4665 filter was specified for the transport, Exim sent two messages over the
4666 same TCP/IP connection, and then failed with "socket operation on non-
4667 socket" when it tried to send the third.
4669 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4671 27. The extern definition of crypt16() in expand.c was not being excluded when
4672 the OS had its own crypt16() function.
4674 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4675 as a preferred synonym for return_size_limit, both as an option and as an
4678 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4680 30. Changed the default configuration ACL to relax the local part checking rule
4681 for addresses that are not in any local domains. For these addresses,
4682 slashes and pipe symbols are allowed within local parts, but the sequence
4683 /../ is explicitly forbidden.
4685 31. SPA server authentication was not clearing the challenge buffer before
4688 32. log_message in a "warn" ACL statement was writing to the reject log as
4689 well as to the main log, which contradicts the documentation and doesn't
4690 seem right (because no rejection is happening). So I have stopped it.
4692 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4693 However, I am unable to do any testing of this.
4695 34. Fixed an infelicity in the appendfile transport. When checking directories
4696 for a mailbox, to see if any needed to be created, it was accidentally
4697 using path names with one or more superfluous leading slashes; tracing
4698 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4700 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4701 contents are added to the log line that is written for every discarded
4702 recipient. (Previously a log_message setting was ignored.)
4704 36. The ${quote: operator now quotes the string if it is empty.
4706 37. The install script runs exim in order to find its version number. If for
4707 some reason other than non-existence or emptiness, which it checks, it
4708 could not run './exim', it was installing it with an empty version number,
4709 i.e. as "exim-". This error state is now caught, and the installation is
4712 38. An argument was missing from the function that creates an error message
4713 when Exim fails to connect to the socket for saslauthd authentication.
4714 This could cause Exim to crash, or give a corrupted message.
4716 39. Added isip, isip4, and isip6 to ${if conditions.
4718 40. The ACL variables $acl_xx are now saved with the message, and can be
4719 accessed later in routers, transports, and filters.
4721 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4722 strings in the file are not string-expanded.
4724 42. If a MAIL command specified a SIZE value that was too large to fit into an
4725 int variable, the check against message_size_limit failed. Such values are
4726 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4727 day this will have to be increased, but I don't think I want to be around
4728 when emails are that large.
4735 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4736 iconv() is not standard in FreeBSD.
4738 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4739 IPv6 enabled. The observed symptom was a segmentation fault on return from
4740 the function os_common_find_running_interfaces() in src/os.c.
4742 3. In the check_special_case() function in daemon.c I had used "errno" as an
4743 argument name, which causes warnings on some systems. This was basically a
4744 typo, since it was named "eno" in the comments!
4746 4. The code that waits for the clock to tick (at a resolution of some fraction
4747 of a second) so as to ensure message-id uniqueness was always waiting for
4748 at least one whole tick, when it could have waited for less. [This is
4749 almost certainly not relevant at current processor speeds, where it is
4750 unlikely to ever wait at all. But we try to future-proof.]
4752 5. The function that sleeps for a time interval that includes fractions of a
4753 second contained a race. It did not block SIGALRM between setting the
4754 timer, and suspending (a couple of lines later). If the interval was short
4755 and the sigsuspend() was delayed until after it had expired, the suspension
4756 never ended. On busy systems this could lead to processes getting stuck for
4759 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4760 process, before it forks any delivery processes. The open lookup caching
4761 mechanism meant that the open file or database connection was passed into
4762 the delivery process. The problem was that delivery processes always tidy
4763 up cached lookup data. This could cause a problem for the next delivery
4764 process started by the queue runner, because the external queue runner
4765 process does not know about the closure. So the next delivery process
4766 still has data in the lookup cache. In the case of a file lookup, there was
4767 no problem because closing a file descriptor in a subprocess doesn't affect
4768 the parent. However, if the lookup was caching a connection to a database,
4769 the connection was closed, and the second delivery process was likely to
4770 see errors such as "PGSQL: query failed: server closed the connection
4771 unexpectedly". The problem has been fixed by closing all cached lookups
4772 in a queue runner before running a delivery process.
4774 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4775 seem to have the "const" qualifier which it has on other OS. I've
4778 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4779 *of the same type* (client or server) with the same public name that an
4780 error should be diagnosed.
4782 9. When Exim looked up a host name for an IP address, but failed to find the
4783 original IP address when looking up the host name (a safety check), it
4784 output the message "<ip address> does not match any IP for NULL", which was
4785 confusing, to say the least. The bug was that the host name should have
4786 appeared instead of "NULL".
4788 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4789 user that is built into the binary, and the -C or -D options is used, root
4790 privilege is dropped before the configuration file is read. In addition,
4791 logging is switched to stderr instead of the normal log files. If the
4792 configuration then re-defines the Exim user, the unprivileged environment
4793 is probably not what is expected, so Exim logs a panic warning message (but
4796 However, if deliver_drop_privilege is set, the unprivileged state may well
4797 be exactly what is intended, so the warning has been cut out in that case,
4798 and Exim is allowed to try to write to its normal log files.
4804 1. smtp_return_error_details was not giving details for temporary sender
4805 or receiver verification errors.
4807 2. Diagnose a configuration error if two authenticators have the same public
4810 3. Exim used not to create the message log file for a message until the first
4811 delivery attempt. This could be confusing when incoming messages were held
4812 for policy or load reasons. The message log file is now created at the time
4813 the message is received, and an initial "Received" line is written to it.
4815 4. The automatically generated man page for command line options had a minor
4816 bug that caused no ill effects; however, a more serious problem was that
4817 the procedure for building the man page automatically didn't always
4818 operate. Consequently, release 4.20 contains an out-of-date version. This
4819 shouldn't happen again.
4821 5. When building Exim with embedded Perl support, the script that builds the
4822 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4823 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4825 6. The freeze_tell option was not being used for messages that were frozen on
4826 arrival, either by an ACL or by local_scan().
4828 7. Added the smtp_incomplete_transaction log selector.
4830 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4831 was accepting AUTH without a new EHLO.
4833 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4834 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4837 10. Logging of TCP/IP connections (when configured) now happens in the main
4838 daemon process instead of the child process, so that the TCP/IP connection
4839 count is more accurate (but it can never be perfect).
4841 11. The use of "drop" in a nested ACL was not being handled correctly in the
4842 outer ACL. Now, if condition failure induced by the nested "drop" causes
4843 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4844 or "require"), the connection is dropped.
4846 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4847 that yield "discard" can now be used with an "accept" or a "discard" verb,
4848 but an error is generated for any others (because I can't see a useful way
4849 to define what should happen).
4851 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4852 are now processed in the same way as lines in the Exim configuration file.
4853 In particular, continuation lines are supported.
4855 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4857 15. Added -ti meaning -t -i.
4859 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4860 domains, and warn by logging if others are found.
4862 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4863 returned from GIFCONF when Exim is trying to find the list of interfaces on
4864 a host. The code in os.c has been modified to copy each ifreq to an aligned
4865 structure in all cases.
4867 Also, in some cases, the returned ifreq's were being copied to a 'struct
4868 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4869 means the last couple of bytes of an IPv6 address could be chopped if the
4870 ifreq contained only a normal sockaddr (14 bytes storage).
4872 18. Named domain lists were not supported in the hosts_treat_as_local option.
4873 An entry such as +xxxx was not recognized, and was treated as a literal
4876 19. Ensure that header lines added by a DATA ACL are included in the reject log
4877 if the ACL subsequently rejects the message.
4879 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4880 MD5 (which is deprecated).
4882 21. When testing a filter file using -bf, Exim was writing a message when it
4883 took the sender from a "From " line in the message, but it was not doing so
4884 when it took $return_path from a Return-Path: header line. It now does.
4886 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4887 with a valid header line field name (a series of printing characters
4888 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4890 23. Changed "disc" in the source to "disk" to conform to the documentation and
4891 the book and for uniformity.
4893 24. Ignore Sendmail's -Ooption=value command line item.
4895 25. When execve() failed while trying to run a command in a pipe transport,
4896 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4897 could be confused with a return value of 69 from the command itself. This
4898 has been changed to 127, the value the shell returns if it is asked to run
4899 a non-existent command. The wording for the related log line suggests a
4900 non-existent command as the problem.
4902 26. If received_header_text expands to an empty string, do not add a Received:
4903 header line to the message. (Well, it adds a token one on the spool, but
4904 marks it "old" so that it doesn't get used or transmitted.)
4906 27. Installed eximstats 1.28 (addition of -nt option).
4908 28. There was no check for failure on the call to getsockname() in the daemon
4909 code. This can fail if there is a shortage of resources on the system, with
4910 ENOMEM, for example. A temporary error is now given on failure.
4912 29. Contrary to the C standard, it seems that in some environments, the
4913 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4914 program. Exim now does this explicitly; it affects the formatting of
4915 timestamps using strftime().
4917 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4918 complaints. I've now initialized all the variables, to avoid this.
4920 32. Header lines added by a system filter were not being "seen" during
4921 transport-time rewrites.
4923 33. The info_callback() function passed to OpenSSL is set up with type void
4924 (*)(SSL *, int, int), as described somewhere. However, when calling the
4925 function (actually a macro) that sets it up, the type void(*)() is
4926 expected. I've put in a cast to prevent warnings from picky compilers.
4928 34. If a DNS black list lookup found a CNAME record, but there were no A
4929 records associated with the domain it pointed at, Exim crashed.
4931 35. If a DNS black list lookup returned more than one A record, Exim ignored
4932 all but the first. It now scans all returned addresses if a particular IP
4933 value is being sought. In this situation, the contents of the
4934 $dnslist_value variable are a list of all the addresses, separated by a
4937 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4938 to accept a host name and all its aliases if the forward lookup for any of
4939 them yielded the IP address of the incoming connection. Now it accepts only
4940 those names whose forward lookup yields the correct IP address. Any other
4941 names are discarded. This closes a loophole whereby a rogue DNS
4942 administrator could create reverse DNS records to break through a
4943 wildcarded host restriction in an ACL.
4945 37. If a user filter or a system filter that ran in a subprocess used any of
4946 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4947 the wrong values were passed to the pipe command ($thisaddress had the
4948 value of $0, $0 had the value of $1, etc). This bug was introduced by
4949 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4951 38. Improved the line breaking for long SMTP error messages from ACLs.
4952 Previously, if there was no break point between 40 and 75 characters, Exim
4953 left the rest of the message alone. Two changes have been made: (a) I've
4954 reduced the minimum length to 35 characters; (b) if it can't find a break
4955 point between 35 and 75 characters, it looks ahead and uses the first one
4956 that it finds. This may give the occasional overlong line, but at least the
4957 remaining text gets split now.
4959 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4960 file descriptors might be low, and that setting 1000 would always raise it.
4961 It turns out that in some environments, the limit is already over 1000 and
4962 that lowering it causes trouble. So now Exim takes care not to decrease it.
4964 40. When delivering a message, the value of $return_path is set to $sender_
4965 address at the start of routing (routers may change the value). By an
4966 oversight, this default was not being set up when an address was tested by
4967 -bt or -bv, which affected the outcome if any router or filter referred to
4970 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4971 log only when "message" or "log_message" are set. However, if one of the
4972 conditions was an address verification, or a call to a nested ACL, the
4973 messages generated by the underlying test were being passed through. This
4974 no longer happens. The underlying message is available in $acl_verify_
4975 message for both "message" and "log_message" expansions, so it can be
4976 passed through if needed.
4978 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4979 new expansion $bh_ to give the encoded byte string without charset
4980 translation. Translation happens only if iconv() is available; HAVE_ICONV
4981 indicates this at build time. HEADERS_CHARSET gives the charset to
4982 translate to; headers_charset can change it in the configuration, and
4983 "headers charset" can change it in an individual filter file.
4985 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4986 that creates RFC 2047 encoded "words" labels them as that charset instead
4987 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4988 expansion operator; (ii) when Exim creates a From: line for a local
4989 message; (iii) when a header line is rewritten to include a "phrase" part.
4991 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4992 buggy, causing it to skip the first lines of messages whose message ID
4993 ended in 'D'. This would not have bitten before Exim release 4.14, because
4994 message IDs were unlikely to end in 'D' before then. The effect was to have
4995 incorrect size information for certain domains.
4997 45. #include "config.h" was missing at the start of the crypt16.c module. This
4998 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5001 46. If there was a timeout during a "random" callout check, Exim treated it as
5002 a failure of the random address, and carried on sending RSET and the real
5003 address. If the delay was just some slowness somewhere, the response to the
5004 original RCPT would be taken as a response to RSET and so on, causing
5005 mayhem of various kinds.
5007 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5008 when I implemented it. It didn't allow for the fact that some option values
5009 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5010 the right test for positive values.
5012 48. Domain names in DNS records are case-independent. Exim always looks them up
5013 in lower case. Some resolvers return domain names in exactly the case they
5014 appear in the zone file, that is, they may contain uppercase letters. Not
5015 all resolvers do this - some return always lower case. Exim was treating a
5016 change of case by a resolver as a change of domain, similar to a widening
5017 of a domain abbreviation. This triggered its re-routing code and so it was
5018 trying to route what was effectively the same domain again. This normally
5019 caused routing to fail (because the router wouldn't handle the domain
5020 twice). Now Exim checks for this case specially, and just changes the
5021 casing of the domain that it ultimately uses when it transmits the message
5024 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5027 50. If a filter generated a file delivery with a non-absolute name (possible if
5028 no home directory exists for the router), the forbid_file option was not
5031 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5032 the existing equality matching.
5034 52. Exim was using ints instead of ino_t variables in some places where it was
5035 dealing with inode numbers.
5037 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5038 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5039 called TMPDIR, and if it finds it is different, it changes its value.
5041 54. The smtp_printf() function is now made available to local_scan() so
5042 additional output lines can be written before returning. There is also an
5043 smtp_fflush() function to enable the detection of a dropped connection.
5044 The variables smtp_input and smtp_batched_input are exported to
5047 55. Changed the default runtime configuration: the message "Unknown user"
5048 has been removed from the ACL, and instead placed on the localuser router,
5049 using the cannot_route_message feature. This means that any verification
5050 failures that generate their own messages won't get overridden. Similarly,
5051 the "Unrouteable address" message that was in the ACL for unverifiable
5052 relay addresses has also been removed.
5054 56. Added hosts_avoid_esmtp to the smtp transport.
5056 57. The exicyclog script was not checking for the esoteric option
5057 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5058 will work only if exicyclog is run under the appropriate euid.
5060 58. Following a discussion on the list, the rules by which Exim recognises line
5061 endings on incoming messages have been changed. The -dropcr and drop_cr
5062 options are now no-ops, retained only for backwards compatibility. The
5063 following line terminators are recognized: LF CRLF CR. However, special
5064 processing applies to CR:
5066 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5067 nor a local message in the state where . is a terminator.
5069 (ii) If a bare CR is encountered in a header line, an extra space is added
5070 after the line terminator so as not to end the header. The reasoning
5071 behind this is that bare CRs in header lines are most likely either
5072 to be mistakes, or people trying to play silly games.
5074 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5075 was being incorrectly given as 18 bytes larger than it should have been.
5076 This is a VOB (very old bug).
5078 60. This may never have affected anything current, but just in case it has:
5079 When the local host is found other than at the start of a list of hosts,
5080 the local host, those with the same MX, and any that follow, are discarded.
5081 When the list in question was part of a longer list of hosts, the following
5082 hosts (not currently being processed) were also being discarded. This no
5083 longer happens. I'm not sure if this situation could ever has previously
5086 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5089 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5090 header. This is something that is recommended in a new Internet Draft, and
5091 is something that is documented as being done by Sendmail. There are two
5092 possible values. For messages generated by the autoreply transport, Exim
5095 Auto-Submitted: auto-replied
5097 whereas for all other generated messages (e.g. bounces) it adds
5099 Auto-Submitted: auto-generated
5101 63. The "personal" condition in filters now includes a test for the
5102 Auto-Submitted: header. If it contains the string "auto-" the message it
5103 not considered personal.
5105 64. Added rcpt_include_affixes as a generic transport option.
5107 65. Added queue_only_override (default true).
5109 66. Added the syslog_duplication option.
5111 67. If what should have been the first header line of a message consisted of
5112 a space followed by a colon, Exim was mis-interpreting it as a header line.
5113 It isn't of course - it is syntactically invalid and should therefore be
5114 treated as the start of the message body. The misbehaviour could have
5115 caused a number of strange effects, including loss of data in subsequent
5116 header lines, and spool format errors.
5118 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5119 client host had authenticated. This control can now be exercised by an ACL
5120 for more flexibility.
5122 69. By default, callouts do not happen when testing with -bh. There is now a
5123 variant, -bhc, which does actually run the callout code, including
5124 consulting and updating the callout cache.
5126 70. Added support for saslauthd authentication, courtesy of Alexander
5129 71. If statvfs() failed on the spool or log directories while checking their
5130 size for availability, Exim confusingly gave the error "space shortage".
5131 Furthermore, in debugging mode it crashed with a floating point exception.
5132 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5133 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5134 serious problem, Exim now writes to the main and panic logs when this
5135 happens, with details of the failure. It then refuses to accept the
5136 incoming message, giving the message "spool directory problem" or "log
5137 directory problem" with a 421 code for SMTP messages.
5139 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5140 0, 1, and 2 exist, because some OS complain for execs without them (see
5141 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5142 descriptors. However, the code omitted to check that the open succeeded,
5143 causing mysterious errors if for some reason the permissions on /dev/null
5144 got screwed. Now Exim writes a message to the main and panic logs, and
5145 bombs out if it can't open /dev/null.
5147 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5148 interact so that it is all more flexible. It is supposed to remain
5149 backwards compatible. Also added extra_local_interfaces.
5151 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5152 to bomb out with an assertion failure - to the client this appears as a
5153 connection drop. This problem occurs in the part of the code that was taken
5154 from the Samba project. Fortunately, the assertion is in a very simple
5155 function, so I have fixed this by reproducing the function inline in the
5156 one place where it is called, and arranging for authentication to fail
5157 instead of killing the process with assert().
5159 75. The SPA client code was not working when the server requested OEM rather
5160 than Unicode encoding.
5162 76. Added code to make require_files with a specific uid setting more usable in
5163 the case where statting the file as root fails - usually a non-root-mounted
5164 NFS file system. When this happens and the failure is EACCES, Exim now
5165 forks a subprocess and does the per-uid checking as the relevant uid.
5167 77. Added process_log_path.
5169 78. If log_file_path was not explicitly set, a setting of check_log_space or
5170 check_log_inodes was ignored.
5172 79. If a space check for the spool or log partitions fails, the incident is now
5173 logged. Of course, in the latter case the data may get lost...
5175 80. Added the %p formatting code to string_format() so that it can be used to
5176 print addresses in debug_print(). Adjusted all the address printing in the
5177 debugging in store.c to use %p rather than %d.
5179 81. There was a concern that a line of code in smtp_in.c could overflow a
5180 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5181 initially expressed, the concern was not well-founded, because trailing
5182 spaces are removed early. However, if the trailing spaces were followed by
5183 a NULL, they did not get removed, so the overflow was possible. Two fixes
5186 (a) I re-wrote the offending code in a cleaner fashion.
5187 (b) If an incoming SMTP command contains a NULL character, it is rejected
5190 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5191 runs initgroups(), so that if the Exim user is in any additional groups,
5192 they will be used during message reception.
5198 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob