1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TF/01 Failure to get a lock on a hints database can have serious
10 consequences so log it to the panic log.
12 TF/02 Log LMTP confirmation messages in the same way as SMTP,
13 controlled using the smtp_confirmation log selector.
15 TF/03 Include the error message when we fail to unlink a spool file.
17 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
18 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
19 for maintaining out-of-tree patches for some time.
21 PP/01 Bugzilla 139: Documentation and portability issues.
22 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
23 Handle per-OS dynamic-module compilation flags.
25 PP/02 Let /dev/null have normal permissions.
26 The 4.73 fixes were a little too stringent and complained about the
27 permissions on /dev/null. Exempt it from some checks.
28 Reported by Andreas M. Kirchwitz.
34 PP/01 Date: & Message-Id: revert to normally being appended to a message,
35 only prepend for the Resent-* case. Fixes regression introduced in
36 Exim 4.70 by NM/22 for Bugzilla 607.
38 PP/02 Include check_rfc2047_length in configure.default because we're seeing
39 increasing numbers of administrators be bitten by this.
41 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
43 PP/03 Bugzilla 994: added openssl_options main configuration option.
45 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
47 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
49 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
51 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
52 without a peer certificate, leading to a segfault because of an
53 assumption that peers always have certificates. Be a little more
54 paranoid. Problem reported by Martin Tscholak.
56 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
57 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
58 NB: ClamAV planning to remove STREAM in "middle of 2010".
59 CL also introduces -bmalware, various -d+acl logging additions and
60 more caution in buffer sizes.
62 PP/09 Implemented reverse_ip expansion operator.
64 PP/10 Bugzilla 937: provide a "debug" ACL control.
66 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
68 PP/12 Bugzilla 973: Implement --version.
70 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
72 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
74 PP/15 Bugzilla 816: support multiple condition rules on Routers.
76 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
77 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
78 ignore trailing whitespace.
80 JJ/02 prevent non-panic DKIM error from being sent to paniclog
82 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
85 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
86 Notification from Dr Andrew Aitchison.
88 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
89 ExtendedDetectionInfo response format.
90 Notification from John Horne.
92 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
95 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
96 XSL and documented dependency on system catalogs, with examples of how
99 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
102 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
103 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
104 configuration file which is writeable by the Exim user or group.
106 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
107 of configuration files to cover files specified with the -C option if
108 they are going to be used with root privileges, not just the default
111 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
112 option (effectively making it always true).
114 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
115 files to be used while preserving root privileges.
117 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
118 that rogue child processes cannot use them.
120 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
121 run-time user, instead of root.
123 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
124 Exim run-time user without dropping privileges.
126 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
127 result string, instead of calling string_vformat() twice with the same
130 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
131 for other users. Others should always drop root privileges if they use
132 -C on the command line, even for a whitelisted configure file.
134 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
136 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
142 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
143 $data_path, and $header_path variables; fixed documentation bugs and
146 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
147 exipick to access non-standard spools, including the "frozen" queue
150 NM/01 Bugzilla 965: Support mysql stored procedures.
151 Patch from Alain Williams
153 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
155 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
156 Patch from Andreas Metzler
158 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
159 Patch from Kirill Miazine
161 NM/05 Bugzilla 671: Added umask to procmail example.
163 JJ/03 installed exipick 20100323.0, fixing doc bug
165 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
166 directory. Notification and patch from Dan Rosenberg.
168 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
170 TK/02 Improve log output when DKIM signing operation fails.
172 MH/01 Treat the transport option dkim_domain as a colon separated
173 list, not as a single string, and sign the message with each element,
174 omitting multiple occurences of the same signer.
176 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
177 Bugzilla 985, 986. Patch by Simon Arlott
179 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
180 Patch by Simon Arlott
182 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
183 MBX locking. Notification from Dan Rosenberg.
189 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
191 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
193 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
195 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
197 NM/04 Bugzilla 915: Flag broken perl installation during build.
203 TK/01 Added patch by Johannes Berg that expands the main option
204 "spamd_address" if it starts with a dollar sign.
206 TK/02 Write list of recipients to X-Envelope-Sender header when building
207 the mbox-format spool file for content scanning (suggested by Jakob
210 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
211 (http://www.dcc-servers.net/) support via dccifd. Activated by
212 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
214 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
215 by Mark Daniel Reidel <mr@df.eu>.
217 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
218 When building exim an external PCRE library is now needed -
219 PCRE is a system library on the majority of modern systems.
220 See entry on PCRE_LIBS in EDITME file.
222 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
223 conversation. Added nologin parameter to request.
224 Patch contributed by Kirill Miazine.
226 TF/01 Do not log submission mode rewrites if they do not change the address.
228 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
230 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
231 log files in place. Contributed by Roberto Lima.
233 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
235 TF/03 Bugzilla 615: When checking the local_parts router precondition
236 after a local_part_suffix or local_part_prefix option, Exim now
237 does not use the address's named list lookup cache, since this
238 contains cached lookups for the whole local part.
240 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
241 Robert Millan. Documentation is in experimental-spec.txt.
243 TF/04 Bugzilla 668: Fix parallel build (make -j).
245 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
247 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
248 Patch provided by Jan Srzednicki.
250 TF/05 Leading white space used to be stripped from $spam_report which
251 wrecked the formatting. Now it is preserved.
253 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
254 that they are available at delivery time.
256 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
258 TF/08 TLS error reporting now respects the incoming_interface and
259 incoming_port log selectors.
261 TF/09 Produce a more useful error message if an SMTP transport's hosts
262 setting expands to an empty string.
264 NM/06 Bugzilla 744: EXPN did not work under TLS.
265 Patch provided by Phil Pennock.
267 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
268 Patch provided by Richard Godbee.
270 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
271 acl_smtp_notquit, added index entry.
273 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
274 Patch provided by Eugene Bujak.
276 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
277 accept(). Patch provided by Maxim Dounin.
279 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
280 Patch provided by Phil Pennock.
282 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
284 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
285 Patch provided by Brad "anomie" Jorsch.
287 NM/14 Bugzilla 622: Added timeout setting to transport filter.
288 Patch provided by Dean Brooks.
290 TK/05 Add native DKIM support (does not depend on external libraries).
292 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
293 Patch provided by Graeme Fowler.
295 NM/16 Bugzilla 851: Documentation example syntax fix.
297 NM/17 Changed NOTICE file to remove references to embedded PCRE.
299 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
302 NM/19 Bugzilla 745: TLS version reporting.
303 Patch provided by Phil Pennock.
305 NM/20 Bugzilla 167: bool: condition support.
306 Patch provided by Phil Pennock.
308 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
309 clients. Patch provided by Phil Pennock.
311 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
312 Patch provided by Brad "anomie" Jorsch.
314 NM/23 Bugzilla 687: Fix misparses in eximstats.
315 Patch provided by Heiko Schlittermann.
317 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
318 Patch provided by Heiko Schlittermann.
320 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
321 plus update to original patch.
323 NM/26 Bugzilla 799: Documentation correction for ratelimit.
325 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
326 Patch provided by David Brownlee.
328 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
330 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
332 NM/30 Bugzilla 888: TLS documentation bugfixes.
334 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
336 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
337 Unlike the original bugzilla I have changed all shell scripts in src tree.
339 NM/33 Bugzilla 898: Transport filter timeout fix.
340 Patch by Todd Rinaldo.
342 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
343 Patch by Serge Demonchaux.
345 NM/35 Bugzilla 39: Base64 decode bug fixes.
346 Patch by Jakob Hirsch.
348 NM/36 Bugzilla 909: Correct connect() call in dcc code.
350 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
352 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
354 NM/39 Bugzilla 911: Fixed MakeLinks build script.
360 TK/01 Add preliminary DKIM support. Currently requires a forked version of
361 ALT-N's libdkim that I have put here:
362 http://duncanthrax.net/exim-experimental/
364 Note to Michael Haardt: I had to rename some vars in sieve.c. They
365 were called 'true' and it seems that C99 defines that as a reserved
366 keyword to be used with 'bool' variable types. That means you could
367 not include C99-style headers which use bools without triggering
368 build errors in sieve.c.
370 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
371 as mailq or other aliases. Changed the --help handling significantly
372 to do whats expected. exim_usage() emits usage/help information.
374 SC/01 Added the -bylocaldomain option to eximstats.
376 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
378 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
380 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
386 PH/01 Another patch from the Sieve maintainer.
388 PH/02 When an IPv6 address is converted to a string for single-key lookup
389 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
390 dots are used instead of colons so that keys in lsearch files need not
391 contain colons. This was done some time before quoting was made available
392 in lsearch files. However, iplsearch files do require colons in IPv6 keys
393 (notated using the quote facility) so as to distinguish them from IPv4
394 keys. This meant that lookups for IP addresses in host lists did not work
395 for iplsearch lookups.
397 This has been fixed by arranging for IPv6 addresses to be expressed with
398 colons if the lookup type is iplsearch. This is not incompatible, because
399 previously such lookups could never work.
401 The situation is now rather anomolous, since one *can* have colons in
402 ordinary lsearch keys. However, making the change in all cases is
403 incompatible and would probably break a number of configurations.
405 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
408 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
409 conversion specification without a maximum field width, thereby enabling
410 a rogue spamd server to cause a buffer overflow. While nobody in their
411 right mind would setup Exim to query an untrusted spamd server, an
412 attacker that gains access to a server running spamd could potentially
413 exploit this vulnerability to run arbitrary code as the Exim user.
415 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
416 $primary_hostname instead of what libspf2 thinks the hosts name is.
418 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
419 a directory entry by the name of the lookup key. Previously, if a
420 symlink pointed to a non-existing file or a file in a directory that
421 Exim lacked permissions to read, a lookup for a key matching that
422 symlink would fail. Now it is enough that a matching directory entry
423 exists, symlink or not. (Bugzilla 503.)
425 PH/03 The body_linecount and body_zerocount variables are now exported in the
428 PH/04 Added the $dnslist_matched variable.
430 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
431 This means they are set thereafter only if the connection becomes
434 PH/06 Added the client_condition to authenticators so that some can be skipped
435 by clients under certain conditions.
437 PH/07 The error message for a badly-placed control=no_multiline_responses left
438 "_responses" off the end of the name.
440 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
442 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
443 (without spaces) instead of just copying the configuration text.
445 PH/10 Added the /noupdate option to the ratelimit ACL condition.
447 PH/11 Added $max_received_linelength.
449 PH/12 Added +ignore_defer and +include_defer to host lists.
451 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
452 way in which PCRE > 7.0 is built.
454 PH/14 Implemented queue_only_load_latch.
456 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
457 MAIL command. The effect was to mangle the value on 64-bit systems.
459 PH/16 Another patch from the Sieve maintainer.
461 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
463 PH/18 If a system quota error occurred while trying to create the file for
464 a maildir delivery, the message "Mailbox is full" was not appended to the
465 bounce if the delivery eventually timed out. Change 4.67/27 below applied
466 only to a quota excession during the actual writing of the file.
468 PH/19 It seems that peer DN values may contain newlines (and other non-printing
469 characters?) which causes problems in log lines. The DN values are now
470 passed through string_printing() before being added to log lines.
472 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
473 and InterBase are left for another time.)
475 PH/21 Added message_body_newlines option.
477 PH/22 Guard against possible overflow in moan_check_errorcopy().
479 PH/23 POSIX allows open() to be a macro; guard against that.
481 PH/24 If the recipient of an error message contained an @ in the local part
482 (suitably quoted, of course), incorrect values were put in $domain and
483 $local_part during the evaluation of errors_copy.
489 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
490 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
493 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
494 issue a MAIL command.
496 PH/02 In an ACL statement such as
498 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
500 if a client was not listed at all, or was listed with a value other than
501 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
502 the condition was not true (as it should be), so access was not denied.
503 The bug was that the ! inversion was incorrectly passed on to the second
504 item. This has been fixed.
506 PH/03 Added additional dnslists conditions == and =& which are different from
507 = and & when the dns lookup returns more than one IP address.
509 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
510 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
512 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
513 FSYNC, which compiles an option called disable_fsync that allows for
514 bypassing fsync(). The documentation is heavily laced with warnings.
516 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
518 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
519 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
520 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
521 including adding "make clean"; (3) Added -fPIC when compiling the test
522 dynamically loaded module, to get rid of a warning.
524 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
525 message fails, move_frozen_messages = true and ignore_bounce_errors_after
526 = 0s. The bug is otherwise harmless.
528 PH/07 There was a bug in the dovecot authenticator such that the value of
529 $auth1 could be overwritten, and so not correctly preserved, after a
530 successful authentication. This usually meant that the value preserved by
531 the server_setid option was incorrect.
533 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
535 PH/09 Installed PCRE release 7.0.
537 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
538 run for batched SMTP input. It is now run at the start of every message
539 in the batch. While fixing this I discovered that the process information
540 (output by running exiwhat) was not always getting set for -bs and -bS
541 input. This is fixed, and it now also says "batched" for BSMTP.
543 PH/11 Added control=no_pipelining.
545 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
546 patch, slightly modified), and move the expansion of helo_data till after
547 the connection is made in the smtp transport (so it can use these
550 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
552 PH/14 Added log_selector = +pid.
554 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
556 PH/16 Add ${if forany and ${if forall.
558 PH/17 Added dsn_from option to vary the From: line in DSNs.
560 PH/18 Flush SMTP output before performing a callout, unless control =
561 no_callout_flush is set.
563 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
564 was true (the default) a successful delivery failed to delete the retry
565 item, thus causing premature timeout of the address. The bug is now
568 PH/20 Added hosts_avoid_pipelining to the smtp transport.
570 PH/21 Long custom messages for fakedefer and fakereject are now split up
571 into multiline reponses in the same way that messages for "deny" and
572 other ACL rejections are.
574 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
575 with slight modification.
577 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
578 draft, changing the syntax and factoring some duplicate code".
580 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
581 for deliveries of the second and subsequent messages over the same SMTP
584 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
585 ${reduce, with only minor "tidies".
587 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
589 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
590 expansion side effects.
592 PH/27 When a message times out after an over-quota error from an Exim-imposed
593 quota, the bounce message says "mailbox is full". This message was not
594 being given when it was a system quota that was exceeded. It now should
597 MH/03 Made $recipients available in local_scan(). local_scan() already has
598 better access to the recipient list through recipients_list[], but
599 $recipients can be useful in postmaster-provided expansion strings.
601 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
602 in the case of a MAIL command with additional options following the
603 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
604 were accidentally chopped off.
606 PH/29 SMTP synchronization checks are implemented when a command is read -
607 there is a check that no more input is waiting when there shouldn't be
608 any. However, for some commands, a delay in an ACL can mean that it is
609 some time before the response is written. In this time, more input might
610 arrive, invalidly. So now there are extra checks after an ACL has run for
611 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
612 pipelining has not been advertised.
614 PH/30 MH's patch to allow iscntrl() characters to be list separators.
616 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
617 returned in the SMTP response when smtp_return_error_details was false.
620 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
621 instead of the C I/O that was originally supplied, because problems were
624 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
625 Exim which did not show up earlier: it was assuming that a call to
626 SSL_CTX_set_info_callback() might give an error value. In fact, there is
627 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
628 was a macro that became an assignment, so it seemed to work. This has
629 changed to a proper function call with a void return, hence the compile
630 error. Exim's code has been fixed.
632 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
635 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
637 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
639 PH/37 If a message is not accepted after it has had an id assigned (e.g.
640 because it turns out to be too big or there is a timeout) there is no
641 "Completed" line in the log. When some messages of this type were
642 selected by exigrep, they were listed as "not completed". Others were
643 picked up by some special patterns. I have improved the selection
644 criteria to be more general.
646 PH/38 The host_find_failed option in the manualroute router can now be set
647 to "ignore", to completely ignore a host whose IP address cannot be
648 found. If all hosts are ignored, the behaviour is controlled by the new
649 host_all_ignored option.
651 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
652 homing or because of multiple MX records with /mx) generated more than
653 one IP address, and the following item turned out to be the local host,
654 all the secondary addresses of the first item were incorrectly removed
655 from the list, along with the local host and any following hosts (which
656 is what is supposed to happen).
658 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
659 whoever called Exim into the -H file. In the case of the daemon it was
660 behaving confusingly. When first started, it used values for whoever
661 started the daemon, but after a SIGHUP it used the Exim user (because it
662 calls itself on a restart). I have changed the code so that it now always
665 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
666 message are rejected with the same error (e.g. no authentication or bad
667 sender address), and a DATA command is nevertheless sent (as can happen
668 with PIPELINING or a stupid MUA), the error message that was given to the
669 RCPT commands is included in the rejection of the DATA command. This is
670 intended to be helpful for MUAs that show only the final error to their
673 PH/42 Another patch from the Sieve maintainer.
675 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
676 Eximstats - Fixed some broken HTML links and added missing column headers
678 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
679 columns for Rejects, Temp Rejects, Ham, and Spam rows.
681 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
683 PH/43 Yet another patch from the Sieve maintainer.
685 PH/44 I found a way to check for a TCP/IP connection going away before sending
686 the response to the final '.' that terminates a message, but only in the
687 case where the client has not sent further data following the '.'
688 (unfortunately, this is allowed). However, in many cases there won't be
689 any further data because there won't be any more messages to send. A call
690 to select() can be used: if it shows that the input is "ready", there is
691 either input waiting, or the socket has been closed. An attempt to read
692 the next input character can distinguish the two cases. Previously, Exim
693 would have sent an OK response which the client would never have see.
694 This could lead to message repetition. This fix should cure that, at
695 least in a lot of common cases.
697 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
698 advertised in response to EHLO.
704 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
705 fixed by 4.65/MH/01 (is this a record?) are fixed:
707 (i) An empty string was always treated as zero by the numeric comparison
708 operators. This behaviour has been restored.
710 (ii) It is documented that the numeric comparison operators always treat
711 their arguments as decimal numbers. This was broken in that numbers
712 starting with 0 were being interpreted as octal.
714 While fixing these problems I realized that there was another issue that
715 hadn't been noticed. Values of message_size_limit (both the global option
716 and the transport option) were treated as octal if they started with 0.
717 The documentation was vague. These values are now always treated as
718 decimal, and I will make that clear in the documentation.
724 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
725 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
728 MH/01 Don't check that the operands of numeric comparison operators are
729 integers when their expansion is in "skipping" mode (fixes bug
730 introduced by 4.64-PH/07).
732 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
733 child addresses, Exim now panics and dies. Previously, because the count
734 is held in a short int, deliveries were likely to be lost. As such a
735 large number of recipients for a single message is ridiculous
736 (performance will be very, very poor), I have chosen to impose a limit
737 rather than extend the field.
743 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
744 leftover -K file (the existence of which was triggered by #402).
745 While we were at it, introduced process PID as part of the -K
746 filename. This should rule out race conditions when creating
749 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
750 processing considerably. Previous code took too long for large mails,
751 triggering a timeout which in turn triggers #401.
753 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
754 in the DK code in transports.c. sendfile() is not really portable,
755 hence the _LINUX specificness.
757 TF/01 In the add_headers option to the mail command in an Exim filter,
758 there was a bug that Exim would claim a syntax error in any
759 header after the first one which had an odd number of characters
762 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
763 callout verification, Exim cached a "reject" for the entire domain. This
764 is correct for most verifications, but it is not correct for a recipient
765 verification with use_sender or use_postmaster set, because in that case
766 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
767 case of MAIL FROM:<> rejection from other early rejections (e.g.
768 rejection of HELO). When verifying a recipient using a non-null MAIL
769 address, the cache is ignored if it shows MAIL FROM:<> rejection.
770 Whatever the result of the callout, the value of the domain cache is
771 left unchanged (for any other kind of callout, getting as far as trying
772 RCPT means that the domain itself is ok).
774 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
777 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
778 manifest itself as EPIPE rather than ECONNECT. When tidying away a
779 session, the daemon ignores ECONNECT errors and logs others; it now
780 ignores EPIPE as well.
782 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
783 (quoted-printable decoding).
785 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
786 later the small subsequent patch to fix an introduced bug.
788 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
790 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
792 PH/08 An error is now given if message_size_limit is specified negative.
794 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
795 to be given (somewhat) arbitrary names.
797 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
800 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
801 miscellaneous code fixes
803 PH/10 Added the log_reject_target ACL modifier to specify where to log
806 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
807 hostname. This is wrong, because it relates to the incoming message (and
808 probably the interface on which it is arriving) and not to the outgoing
809 callout (which could be using a different interface). This has been
810 changed to use the value of the helo_data option from the smtp transport
811 instead - this is what is used when a message is actually being sent. If
812 there is no remote transport (possible with a router that sets up host
813 addresses), $smtp_active_hostname is used.
815 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
816 tweaks were necessary in order to get it to work (see also 21 below):
817 (a) The code assumed that strncpy() returns a negative number on buffer
818 overflow, which isn't the case. Replaced with Exim's string_format()
820 (b) There were several signed/unsigned issues. I just did the minimum
821 hacking in of casts. There is scope for a larger refactoring.
822 (c) The code used strcasecmp() which is not a standard C function.
823 Replaced with Exim's strcmpic() function.
824 (d) The code set only $1; it now sets $auth1 as well.
825 (e) A simple test gave the error "authentication client didn't specify
826 service in request". It would seem that Dovecot has changed its
827 interface. Fortunately there's a specification; I followed it and
828 changed what the client sends and it appears to be working now.
830 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
833 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
834 address A is aliased to B and C, where B exists and C does not. Without
835 -v the output is "A verified" because verification stops after a
836 successful redirection if more than one address is generated. However,
837 with -v the child addresses are also verified. Exim was outputting "A
838 failed to verify" and then showing the successful verification for C,
839 with its parentage. It now outputs "B failed to verify", showing B's
840 parentage before showing the successful verification of C.
842 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
843 look up a TXT record in a specific list after matching in a combined
846 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
847 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
848 they consult the DNS. I had assumed they would set it the way they
849 wanted; and indeed my experiments on Linux seem to show that in some
850 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
851 To be on the safe side, however, I have now made the interface to
852 host_find_byname() similar to host_find_bydns(), with an argument
853 containing the DNS resolver options. The host_find_byname() function now
854 sets these options at its start, just as host_find_bydns() does. The smtp
855 transport options dns_qualify_single and dns_search_parents are passed to
856 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
857 of host_find_byname() use the default settings of RES_DEFNAMES
858 (qualify_single) but not RES_DNSRCH (search_parents).
860 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
861 spool_read_header() do less string testing, by means of a preliminary
862 switch on the second character of optional "-foo" lines. (This is
863 overdue, caused by the large number of possibilities that now exist.
864 Originally there were few.) While I was there, I also converted the
865 str(n)cmp tests so they don't re-test the leading "-" and the first
866 character, in the hope this might squeeze out yet more improvement.
868 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
869 flag allowing group syntax was set by the header_syntax check but not
870 turned off, possible causing trouble later; (2) The flag was not being
871 set at all for the header_verify test, causing "group"-style headers to
872 be rejected. I have now set it in this case, and also caused header_
873 verify to ignore an empty address taken from a group. While doing this, I
874 came across some other cases where the code for allowing group syntax
875 while scanning a header line wasn't quite right (mostly, not resetting
876 the flag correctly in the right place). These bugs could have caused
877 trouble for malformed header lines. I hope it is now all correct.
879 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
880 with the "reply" argument non-NULL. The code, however (which originally
881 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
882 but it didn't always do it. This confused somebody who was copying the
883 code for some other use. I have removed all the tests.
885 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
886 feature that was used to support insecure browsers during the U.S. crypto
887 embargo. It requires special client support, and Exim is probably the
888 only MTA that supported it -- and would never use it because real RSA is
889 always available. This code has been removed, because it had the bad
890 effect of slowing Exim down by computing (never used) parameters for the
891 RSA_EXPORT functionality.
893 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
894 authenticator to fail if there's a tab character in the incoming data
895 (there should never be unless someone is messing about, as it's supposed
896 to be base64-encoded). Also added, on Timo's advice, the "secured" option
897 if the connection is using TLS or if the remote IP is the same as the
898 local IP, and the "valid-client-cert option" if a client certificate has
901 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
902 authenticators. This can be used for authorization after authentication
903 succeeds. (In the case of plaintext, it servers for both authentication
906 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
907 if any retry times were supplied.
909 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
910 connection, where there is no client IP address to check. In this
911 situation, the verify now always succeeds.
913 PH/25 Applied John Jetmore's -Mset patch.
915 PH/26 Added -bem to be like -Mset, but loading a message from a file.
917 PH/27 In a string expansion for a processed (not raw) header when multiple
918 headers of the same name were present, leading whitespace was being
919 removed from all of them, but trailing whitespace was being removed only
920 from the last one. Now trailing whitespace is removed from each header
921 before concatenation. Completely empty headers in a concatenation (as
924 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
925 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
927 PH/29 [Removed. This was a change that I later backed out, and forgot to
928 correct the ChangeLog entry (that I had efficiently created) before
929 committing the later change.]
931 PH/30 Exim was sometimes attempting to deliver messages that had suffered
932 address errors (4xx response to RCPT) over the same connection as other
933 messages routed to the same hosts. Such deliveries are always "forced",
934 so retry times are not inspected. This resulted in far too many retries
935 for the affected addresses. The effect occurred only when there were more
936 hosts than the hosts_max_try setting in the smtp transport when it had
937 the 4xx errors. Those hosts that it had tried were not added to the list
938 of hosts for which the message was waiting, so if all were tried, there
939 was no problem. Two fixes have been applied:
941 (i) If there are any address or message errors in an SMTP delivery, none
942 of the hosts (tried or untried) are now added to the list of hosts
943 for which the message is waiting, so the message should not be a
944 candidate for sending over the same connection that was used for a
945 successful delivery of some other message. This seems entirely
946 reasonable: after all the message is NOT "waiting for some host".
947 This is so "obvious" that I'm not sure why it wasn't done
948 previously. Hope I haven't missed anything, but it can't do any
949 harm, as the worst effect is to miss an optimization.
951 (ii) If, despite (i), such a delivery is accidentally attempted, the
952 routing retry time is respected, so at least it doesn't keep
953 hammering the server.
955 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
956 in ${readsocket because some servers need this prod.
958 PH/32 Added some extra debug output when updating a wait-xxx database.
960 PH/33 The hint "could be header name not terminated by colon", which has been
961 given for certain expansion errors for a long time, was not being given
962 for the ${if def:h_colon_omitted{... case.
964 PH/34 The spec says: "With one important exception, whenever a domain list is
965 being scanned, $domain contains the subject domain." There was at least
966 one case where this was not true.
968 PH/35 The error "getsockname() failed: connection reset by peer" was being
969 written to the panic log as well as the main log, but it isn't really
970 panic-worthy as it just means the connection died rather early on. I have
971 removed the panic log writing for the ECONNRESET error when getsockname()
974 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
975 runs only) independently of the message's sender address. This meant
976 that, if the 4xx error was in fact related to the sender, a different
977 message to the same recipient with a different sender could confuse
978 things. In particualar, this can happen when sending to a greylisting
979 server, but other circumstances could also provoke similar problems.
980 I have changed the default so that the retry time for these errors is now
981 based a combination of the sender and recipient addresses. This change
982 can be overridden by setting address_retry_include_sender=false in the
985 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
986 remote server are returned as part of bounce messages. This was not
987 happening for LMTP over a pipe (the lmtp transport), but now it is the
988 same for both kinds of LMTP.
990 PH/38 Despite being documented as not happening, Exim was rewriting addresses
991 in header lines that were in fact CNAMEs. This is no longer the case.
993 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
994 and queue runs started by the daemon processed all messages. This has
995 been fixed so that -R and -S can now usefully be given with -q<time>.
997 PH/40 Import PCRE release 6.7 (fixes some bugs).
999 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1001 PH/42 Give an error if -q is specified more than once.
1003 PH/43 Renamed the variables $interface_address and $interface_port as
1004 $received_ip_address and $received_port, to make it clear that these
1005 values apply to message reception, and not to the outgoing interface when
1006 a message is delivered. (The old names remain recognized, of course.)
1008 PH/44 There was no timeout on the connect() call when using a Unix domain
1009 socket in the ${readsocket expansion. There now is.
1011 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1012 be meaningful with "accept".
1014 SC/01 Eximstats V1.43
1015 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1017 SC/02 Eximstats V1.44
1018 Use a glob alias rather than an array ref in the generated
1019 parser. This improves both readability and performance.
1021 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1022 Collect SpamAssassin and rejection statistics.
1023 Don't display local sender or destination tables unless
1024 there is data to show.
1025 Added average volumes into the top table text output.
1027 SC/04 Eximstats V1.46
1028 Collect data on the number of addresses (recipients)
1029 as well as the number of messages.
1031 SC/05 Eximstats V1.47
1032 Added 'Message too big' to the list of mail rejection
1033 reasons (thanks to Marco Gaiarin).
1035 SC/06 Eximstats V1.48
1036 Mainlog lines which have GMT offsets and are too short to
1037 have a flag are now skipped.
1039 SC/07 Eximstats V1.49 (Alain Williams)
1040 Added the -emptyok flag.
1042 SC/08 Eximstats V1.50
1043 Fixes for obtaining the IP address from reject messages.
1045 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1046 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1047 whitesspace changes from 4.64-PH/27
1049 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1052 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1053 are found, allow negative numbers in numeric criteria)
1055 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1057 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1058 to match changes made in 4.64-PH/43
1060 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1062 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1063 "domain" is actually an IP address, and force a failure. This locks out
1064 those revolvers/nameservers that support "A-for-A" lookups, in
1065 contravention of the specifications.
1067 PH/48 When a host name was looked up from an IP address, and the subsequent
1068 forward lookup of the name timed out, the host name was left in
1069 $sender_host_name, contrary to the specification.
1071 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1072 restricted to single-key lookups, Exim was not diagnosing an error if
1073 * or *@ was used with a query-style lookup.
1075 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1077 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1078 long ago, but noone interested enough thought of it. Let's just say that
1079 the "1.1" means that there are some new functions that weren't there at
1080 some point in the past.
1082 PH/51 Error processing for expansion failure of helo_data from an smtp
1083 transport during callout processing was broken.
1085 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1086 tested/used via the -bh/-bhc/-bs options.
1088 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1089 bug, fixed in subsequent PCRE releases).
1091 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1092 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1094 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1100 SC/01 Use a glob alias rather than an array ref in eximstats generated
1101 parser. This improves both readability and performance.
1103 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1104 Don't display local sender or destination tables in eximstats unless
1105 there is data to show.
1106 Added average volumes into the eximstats top table text output.
1108 SC/03 Collect data on the number of addresses (recipients) as well
1109 as the number of messages in eximstats.
1111 TF/01 Correct an error in the documentation for the redirect router. Exim
1112 does (usually) call initgroups() when daemonizing.
1114 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1115 with consistent privilege compared to when running as a daemon.
1117 TF/03 Note in the spec that $authenticated_id is not set for local
1118 submissions from trusted users.
1120 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1121 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1123 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1124 by adding some example configuration directives to the default
1125 configuration file. A little bit of work is required to uncomment the
1126 directives and define how usernames and passwords are checked, but
1127 there is now a framework to start from.
1129 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1130 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1131 without this. I don't know how relevant this is to other LDAP libraries.
1133 PH/02 Add the verb name to the "unknown ACL verb" error.
1135 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1137 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1139 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1140 directory not expanded when it should be if an expanded home directory
1141 was set for the address (which is overridden by the transport).
1143 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1146 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1147 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1148 because it is too late at that time, and has no effect.
1150 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1151 security issue with \' (bugzilla #107). I could not use the
1152 PQescapeStringConn() function, because it needs a PGconn value as one of
1155 PH/08 When testing addresses using -bt, indicate those final addresses that
1156 are duplicates that would not cause an additional delivery. At least one
1157 person was confused, thinking that -bt output corresponded to deliveries.
1158 (Suppressing duplicates isn't a good idea as you lose the information
1159 about possibly different redirections that led to the duplicates.)
1161 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1162 systems where poll() doesn't work, in particular OS X.
1164 PH/10 Added more information to debugging output for retry time not reached.
1166 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1167 operations in malware.c.
1169 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1172 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1173 syslog_duplication set false, log lines that would normally be written
1174 both the the main log and to the reject log were not written to syslog at
1177 PH/14 In the default configuration, change the use of "message" in ACL warn
1178 statements to "add_header".
1180 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1181 not followed by a command (e.g. "seen endif").
1183 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1184 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1187 PH/17 Added extra conditions to the default value of delay_warning_condition
1191 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1192 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1193 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1196 The Auto-Submitted: and various List- headers are standardised, whereas I
1197 don't think Precedence: ever was.
1199 PH/18 Refactored debugging code in route_finduser() to show more information,
1200 in particular, the error code if getpwnam() issues one.
1202 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1203 This is apparently needed in addition to the PH/07 change above to avoid
1204 any possible encoding problems.
1206 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1207 but not after initializing Perl.
1209 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1210 output them only if debugging. By default they are written stderr,
1211 apparently, which is not desirable.
1213 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1216 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1219 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1221 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1222 authenticated or an ident call has been made. Suppress the default
1223 values for $authenticated_id and $authenticated_sender (but permit -oMai
1224 and -oMas) when testing with -bh.
1226 PH/24 Re-jigged the order of the tests in the default configuration so that the
1227 tests for valid domains and recipients precede the DNS black list and CSA
1228 tests, on the grounds that those ones are more expensive.
1230 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1231 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1232 This bug exists in every version of Exim that I still have, right back to
1235 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1236 However, an attempt to turn on case-sensitivity in a regex key by
1237 including (?-i) didn't work because the subject string was already
1238 lowercased, and the effects were non-intuitive. It turns out that a
1239 one-line patch can be used to allow (?-i) to work as expected.
1245 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1246 other effects) broke the use of negated acl sub-conditions.
1248 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1251 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1252 "Deny" causes Exim to reject the incoming connection with a 554 error.
1253 Unfortunately, if there is a major crisis, such as a disk failure,
1254 tcp-wrappers gives "deny", whereas what one would like would be some
1255 kind of temporary error. A kludge has been added to help with this.
1256 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1257 554 error is used if errno is still zero or contains ENOENT (which occurs
1258 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1261 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1263 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1264 errors. Otherwise a message that provokes a temporary error (when other
1265 messages do not) can cause a whole host to time out.
1267 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1268 addresses were routed directly to files or pipes from a redirect router.
1269 File deliveries just didn't batch; pipe deliveries might have suffered
1272 PH/06 A failure to get a lock for a hints database would erroneously always say
1273 "Failed to get write lock", even when it was really a read lock.
1275 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1276 of 0600. This has been changed to use the value of the lockfile_mode
1277 option (which defaults to 0600).
1279 PH/08 Applied small patch from the Sieve maintainer.
1281 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1282 folder from quota calculations, a direct delivery into this folder messed
1283 up the contents of the maildirsize file. This was because the regex was
1284 used only to exclude .Trash (or whatever) when the size of the mailbox
1285 was calculated. There was no check that a delivery was happening into an
1286 excluded directory. This bug has been fixed by ignoring all quota
1287 processing for deliveries into excluded directories.
1289 PH/10 Added the maildirfolder_create_regex option to appendfile.
1295 PH/01 The code for finding all the local interface addresses on a FreeBSD
1296 system running IPv6 was broken. This may well have applied to all BSD
1297 systems, as well as to others that have similar system calls. The broken
1298 code found IPv4 interfaces correctly, but gave incorrect values for the
1299 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1300 that it would not match correctly against @[] and not recognize the IPv6
1303 PH/02 The ipliteral router was not recognizing addresses of the form user@
1304 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1306 PH/03 Added disable_ipv6.
1308 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1309 decoded form, because it is most often used to construct To: headers
1310 lines in autoreplies, and the decoded form may well be syntactically
1311 invalid. However, $reply_address has leading white space removed, and all
1312 newlines turned into spaces so that the autoreply transport does not
1315 PH/05 If group was specified without a user on a router, and no group or user
1316 was specified on a transport, the group from the router was ignored.
1318 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1319 for visible compile-time settings that can be used to change these
1320 numbers, for those that want even more. Backwards compatibility with old
1321 spool files has been maintained. However, going back to a previous Exim
1322 release will lost any variables that are in spool files.
1324 PH/07 Two small changes when running in the test harness: increase delay when
1325 passing a TCP/IP connection to a new process, in case the original
1326 process has to generate a bounce, and remove special handling of
1327 127.0.0.2 (sic), which is no longer necessary.
1329 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1330 be the same on different OS.
1332 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1335 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1336 whether --show-vars was specified or not
1338 JJ/02 exipick: Added support for new ACL variable spool format introduced
1341 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1342 syntactically invalid From: or Reply-to: line, and a filter used this to
1343 generate an autoreply, and therefore failed to obtain an address for the
1344 autoreply, Exim could try to deliver to a non-existent relative file
1345 name, causing unrelated and misleading errors. What now happens is that
1346 it logs this as a hard delivery error, but does not attempt to create a
1349 PH/11 The exinext utility has a -C option for testing purposes, but although
1350 the given file was scanned by exinext itself; it wasn't being passed on
1351 when Exim was called.
1353 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1354 an end-of-file indication when reading a command response.
1356 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1357 compiled. In many other places in Exim, IPv6 addresses are always
1358 recognized, so I have changed this. It also means that IPv4 domain
1359 literals of the form [IPV4:n.n.n.n] are now always recognized.
1361 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1362 used if the router is not running as root, for example, when verifying at
1363 ACL time, or when using -bh. The debugging output from this situation was
1364 non-existent - all you got was a failure to exec. I have made two
1367 (a) Failures to set uid/gid, the current directory, or a process leader
1368 in a subprocess such as that created by queryprogram now generate
1369 suitable debugging ouput when -d is set.
1371 (b) The queryprogram router detects when it is not running as root,
1372 outputs suitable debugging information if -d is set, and then runs
1373 the subprocess without attempting to change uid/gid.
1375 PH/15 Minor change to Makefile for building test_host (undocumented testing
1378 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1379 additional section of a DNS packet that returns MX or SRV records.
1380 Instead, it always explicitly searches for A/AAAA records. This avoids
1381 major problems that occur when a DNS server includes only records of one
1382 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1383 fixed another bug: if SRV records were looked up and the corresponding
1384 address records were *not* found in the additional section, the port
1385 values from the SRV records were lost.
1387 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1388 using the correct key (the original address) when searching the retry
1389 rules in order to find which one to use for generating the retry hint.
1391 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1392 adding the default one. Similarly, if it contains a Reply-To: header, the
1393 errors_reply_to option, if set, is not used.
1395 PH/19 When calculating a retry time, Exim used to measure the "time since
1396 failure" by looking at the "first failed" field in the retry record. Now
1397 it does not use this if it is later than than the arrival time of the
1398 message. Instead it uses the arrival time. This makes for better
1399 behaviour in cases where some deliveries succeed, thus re-setting the
1400 "first failed" field. An example is a quota failure for a huge message
1401 when small messages continue to be delivered. Without this change, the
1402 "time since failure" will always be short, possible causing more frequent
1403 delivery attempts for the huge message than are intended.
1404 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1406 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1407 $1, $2, $3) because the numerical variables can be reset during some
1408 expansion items (e.g. "match"), thereby losing the authentication data.
1410 PH/21 Make -bV show the size of off_t variables so that the test suite can
1411 decide whether to run tests for quotas > 2G.
1413 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1414 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1415 filecount value is greater than 2G or if a quota value is greater than 2G
1416 on a system where the size of off_t is not greater than 4, a panic error
1419 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1420 never match. The debug and -bh output now contains an explicit error
1421 message indicating a malformed IPv4 address or mask.
1423 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1424 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1425 PH/23 above applies.
1427 PH/25 Do not write to syslog when running in the test harness. The only
1428 occasion when this arises is a failure to open the main or panic logs
1429 (for which there is an explicit test).
1431 PH/26 Added the /no_tell option to "control=freeze".
1433 PH/27 If a host name lookup failed very early in a connection, for example, if
1434 the IP address matched host_lookup and the reverse lookup yielded a name
1435 that did not have a forward lookup, an error message of the form "no IP
1436 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1437 could be logged. Now it outputs the IP address instead of "NULL".
1439 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1440 allows the sender and the authenticated sender to be set when
1441 submitting a message from within Exim. Since child_open_exim() is
1442 documented for local_scan(), the new function should be too.
1444 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1445 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1446 results in an empty string is now treated as unset.
1448 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1450 PH/31 Added sender_verify_fail logging option.
1452 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1453 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1454 tidied the source and removed it altogether.
1456 PH/33 When a queue run was abandoned because the load average was too high, a
1457 log line was always written; now it is written only if the queue_run log
1458 selector is set. In addition, the log line for abandonment now contains
1459 information about the queue run such as the pid. This is always present
1460 in "start" and "stop" lines but was omitted from the "abandon" line.
1462 PH/34 Omit spaces between a header name and the colon in the error message that
1463 is given when verify = headers_syntax fails (if there are lots of them,
1464 the message gets confusing).
1466 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1467 names, as there are now some PTR records that contain slashes. This check
1468 is only to protect against broken name servers that fall over on strange
1469 characters, so the fact that it applies to all lookups doesn't matter.
1471 PH/36 Now that the new test suite is complete, we can remove some of the
1472 special code in Exim that was needed for the old test suite. For example,
1473 sorting DNS records because real resolvers return them in an arbitrary
1474 order. The new test suite's fake resolver always returns records in the
1477 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1478 bounces) except when queue_only is set, to avoid logging races between
1479 the different processes.
1481 PH/38 Panic-die if .include specifies a non-absolute path.
1483 PH/39 A tweak to the "H" retry rule from its user.
1485 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1486 a label. They prevented compilation on older perls.
1488 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1489 a warning to be raised on newish perls.
1491 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1492 on queue. Changes to match documented behaviour of showing count of
1493 messages matching specified criteria.
1495 PH/40 Changed the default ident timeout from 30s to 5s.
1497 PH/41 Added support for the use of login_cap features, on those BSD systems
1498 that have them, for controlling the resources used by pipe deliveries.
1500 PH/42 The content-scanning code uses fopen() to create files in which to put
1501 message data. Previously it was not paying any attention to the mode of
1502 the files. Exim runs with umask(0) because the rest of the code creates
1503 files with open(), and sets the required mode explicitly. Thus, these
1504 files were ending up world-writeable. This was not a big issue, because,
1505 being within the spool directory, they were not world-accessible. I have
1506 created a function called modefopen, which takes an additional mode
1507 argument. It sets umask(777), creates the file, chmods it to the required
1508 mode, then resets the umask. All the relevant calls to fopen() in the
1509 content scanning code have been changed to use this function.
1511 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1512 to 24 hours. This avoids potential overflow problems when processing G
1513 and H retry rules. I suspect nobody ever tinkers with this value.
1515 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1517 PH/45 When the plaintext authenticator is running as a client, the server's
1518 challenges are checked to ensure they are valid base64 strings. By
1519 default, the authentication attempt is cancelled if an invalid string is
1520 received. Setting client_ignore_invalid_base64 true ignores these errors.
1521 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1522 they are received. Thus, the responses can be made to depend on the
1523 challenges. If an invalid string is ignored, an empty string is placed in
1526 PH/46 Messages that are created by the autoreply transport now contains a
1527 References: header, in accordance with RFCs 2822 and 3834.
1529 PH/47 Added authenticated_sender_force to the smtp transport.
1531 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1533 PH/49 Installed latest patch from the Sieve maintainer.
1535 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1536 was also set, the appendfile transport was unnecessarily scanning a
1537 directory of message files (e.g. for maildir delivery) to find the count
1538 of files (along with the size), even though it did not need this
1539 information. It now does the scan only if it needs to find either the
1540 size of the count of files.
1542 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1544 PH/52 Two bugs concerned with error handling when the smtp transport is
1547 (i) Exim was not creating retry information for temporary errors given
1548 for individual recipients after the DATA command when the smtp transport
1549 was used in LMTP mode. This meant that they could be retried too
1550 frequently, and not timed out correctly.
1552 (ii) Exim was setting the flag that allows error details to be returned
1553 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1554 recipients that were returned after the DATA command.
1556 PH/53 This is related to PH/52, but is more general: for any failing address,
1557 when detailed error information was permitted to be returned to the
1558 sender, but the error was temporary, then after the final timeout, only
1559 "retry timeout exceeded" was returned. Now it returns the full error as
1560 well as "retry timeout exceeded".
1562 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1563 do this, and (what is worse) MTAs that accept it.
1565 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1566 will now be deprecated.
1568 PH/56 New os.c-cygwin from the Cygwin maintainer.
1570 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1571 formats (previously only available in exim formats via -bpr, -bpru,
1572 and -bpra. Now also available in native and exiqgrep formats)
1574 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1575 with very large, slow to parse queues
1577 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1579 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1581 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1582 responses to authentication challenges, though it was showing the
1583 challenges; (ii) I've removed the CR characters from the debug output for
1586 PH/58 Allow for the insertion of a newline as well as a space when a string
1587 is turned into more than one encoded-word during RFC 2047 encoding. The
1588 Sieve code now uses this.
1590 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1591 data_4xx, lost_connection, tls_required.
1593 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1594 message was being sent as an SMTP response.
1596 PH/61 Add -l and -k options to exicyclog.
1598 PH/62 When verifying, if an address was redirected to one new address, so that
1599 verification continued, and the new address failed or deferred after
1600 having set something in $address_data, the value of $address_data was not
1601 passed back to the ACL. This was different to the case when no
1602 redirection occurred. The value is now passed back in both cases.
1604 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1605 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1606 use login_cap.h, so on its own it isn't the distinguishing feature. The
1607 new name refers directly to the setclassresources() function.
1609 PH/65 Added configuration files for NetBSD3.
1611 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1613 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1614 is preferred over IPv4.
1616 PH/68 The bounce_return_message and bounce_return_body options were not being
1617 honoured for bounces generated during the reception of non-SMTP messages.
1618 In particular, this applied to messages rejected by the ACL. This bug has
1619 been fixed. However, if bounce_return_message is true and bounce_return_
1620 body is false, the headers that are returned for a non-SMTP message
1621 include only those that have been read before the error was detected.
1622 (In the case of an ACL rejection, they have all been read.)
1624 PH/69 The HTML version of the specification is now built in a directory called
1625 spec_html instead of spec.html, because the latter looks like a path with
1626 a MIME-type, and this confuses some software.
1628 PH/70 Catch two compiler warnings in sieve.c.
1630 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1631 function verify_get_ident() calls ip_connect() to connect a socket, but
1632 if the "connect()" function timed out, ip_connect() used to close the
1633 socket. However, verify_get_ident() also closes the socket later, and in
1634 between Exim writes to the log, which may get opened at this point. When
1635 the socket was closed in ip_connect(), the log could get the same file
1636 descriptor number as the socket. This naturally causes chaos. The fix is
1637 not to close the socket in ip_connect(); the socket should be closed by
1638 the function that creates it. There was only one place in the code where
1639 this was missing, in the iplookup router, which I don't think anybody now
1640 uses, but I've fixed it anyway.
1642 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1643 well as to direct DNS lookups. Otherwise the handling of names in host
1644 lists is inconsistent and therefore confusing.
1650 PH/01 Two changes to the default runtime configuration:
1652 (1) Move the checks for relay_from_hosts and authenticated clients from
1653 after to before the (commented out) DNS black list checks.
1655 (2) Add control=submission to the relay_from_hosts and authenticated
1656 clients checks, on the grounds that messages accepted by these
1657 statements are most likely to be submissions.
1659 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1661 (1) Generate an error if the third argument for the ${prvs expansion is
1664 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1667 (3) Reset the variables that are obtained from the first argument of
1668 ${prvscheck and used in the second argument before leaving the code,
1669 because their memory is reclaimed, so using them afterwards may do
1672 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1673 one (it's much easier than Tom thought :-).
1675 (5) Because of (4), we can now allow for the use of $prvscheck_result
1676 inside the third argument.
1678 PH/03 For some reason, the default setting of PATH when running a command from
1679 a pipe transport was just "/usr/bin". I have changed it to
1682 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1683 anything to be listed in the output from -bV.
1685 PH/05 When a filter generated an autoreply, the entire To: header line was
1686 quoted in the delivery log line, like this:
1688 => >A.N.Other <ano@some.domain> <original@ddress> ...
1690 This has been changed so that it extracts the operative address. There
1691 may be more than one such address. If so, they are comma-separated, like
1694 => >ano@some.domain,ona@other.domain <original@ddress> ...
1696 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1697 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1698 not being looked up in the rDNS to get a host name, Exim was showing the
1699 IP address twice in Received: lines, even though the IP addresses were
1700 identical. For example:
1702 Received: from [1.2.3.4] (helo=[1.2.3.4])
1704 However, if the real host name was known, it was omitting the HELO data
1705 if it matched the actual IP address. This has been tidied up so that it
1706 doesn't show the same IP address twice.
1708 PH/07 When both +timestamp and +memory debugging was on, the value given by
1709 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1710 called by the debug printing, thereby overwriting the timestamp buffer.
1711 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1713 PH/08 When the original message was included in an autoreply transport, it
1714 always said "this is a copy of the message, including all the headers",
1715 even if body_only or headers_only was set. It now gives an appropriate
1718 PH/09 Applied a patch from the Sieve maintainer which:
1720 o fixes some comments
1721 o adds the (disabled) notify extension core
1722 o adds some debug output for the result of if/elsif tests
1723 o points to the current vacation draft in the documentation
1724 and documents the missing references header update
1728 o fixes a bug in processing the envelope test (when testing
1729 multiple envelope elements, the last element determinted the
1732 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1733 Electronic Mail") by including:
1735 Auto-submitted: auto-generated
1737 in the messages that it generates (bounce messages and others, such as
1738 warnings). In the case of bounce messages for non-SMTP mesages, there was
1739 also a typo: it was using "Auto_submitted" (underscore instead of
1740 hyphen). Since every message generated by Exim is necessarily in response
1741 to another message, thes have all been changed to:
1743 Auto-Submitted: auto-replied
1745 in accordance with these statements in the RFC:
1747 The auto-replied keyword:
1749 - SHOULD be used on messages sent in direct response to another
1750 message by an automatic process,
1752 - MUST NOT be used on manually-generated messages,
1754 - MAY be used on Delivery Status Notifications (DSNs) and Message
1755 Disposition Notifications (MDNs),
1757 - MUST NOT be used on messages generated by automatic or periodic
1758 processes, except for messages which are automatic responses to
1761 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1762 to the default Received: header definition.
1764 PH/12 Added log selector acl_warn_skipped (default on).
1766 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1767 variables because (a) they are in the wrong storage pool and (b) even if
1768 they were copied, it wouldn't work properly because of the caching.
1770 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1771 checking when decoding. Apparently there are clients that generate
1772 overlong encoded strings. Why am I not surprised?
1774 PH/15 If the first argument of "${if match_address" was not empty, but did not
1775 contain an "@" character, Exim crashed. Now it writes a panic log message
1776 and treats the condition as false.
1778 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1780 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1781 extension "envelope-auth". The code is finished and in agreement with
1782 other implementations, but there is no documentation so far and in fact,
1783 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1784 not changing the active code.
1786 Print executed "if" and "elsif" statements when debugging is used. This
1787 helps a great deal to understand what a filter does.
1789 Document more things not specified clearly in RFC3028. I had all this
1790 sorted out, when out of a sudden new issues came to my mind. Oops."
1792 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1795 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1796 canonical form (as documented). However, after a host name lookup from
1797 the IP address, check_host() was doing a simple string comparison with
1798 addresses acquired from the DNS when checking that the found name did
1799 have the original IP as one of its addresses. Since any found IPv6
1800 addresses are likely to be in abbreviated form, the comparison could
1801 fail. Luckily, there already exists a function for doing the comparison
1802 by converting both addresses to binary, so now that is used instead of
1803 the text comparison.
1805 PH/20 There was another similar case to PH/19, when a complete host name was
1806 given in a host list; looking up its IP address could give an abbreviated
1807 form, whereas the current host's name might or might not be abbreviated.
1808 The same fix has been applied.
1814 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1815 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1818 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1819 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1821 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1823 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1824 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1825 Also, for "Auto-Submitted", treat anything other than "no" as
1826 non-personal, in accordance with RFC 3834. (Previously it treated
1827 anything starting "auto-" as non-personal.)
1829 TF/01 The control=submission/name=... option had a problem with syntax
1830 errors if the name included a slash character. The /name= option
1831 now slurps the rest of the string, so it can include any characters
1832 but it must come last in the list of options (after /sender_retain
1835 PH/05 Some modifications to the interface to the fake nameserver for the new
1843 TK/01 Added the "success_on_redirect" address verification option. See
1844 NewStuff for rationale and an example.
1846 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1848 PH/02 Patch to exigrep to allow it to work on syslog lines.
1850 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1851 fread() to skip over the body file's header line, because in Cygwin the
1852 header line is locked and is inaccessible.
1854 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1855 co-exist for some time) to make it clear that it is the Exim ID that is
1856 referenced, not the Message-ID: header line.
1858 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1859 string_format() function, because snprintf() does not exist on all
1862 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1863 ${stat: expansion item.
1865 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1866 protocol synchronization error", to keep the pedants happy.
1868 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1869 well as for IRIX systems, when gcc is being used. See the host.c source
1872 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1874 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1877 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1878 transport and to the smtp transport in LMTP mode.
1880 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1882 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1883 run a filter in a subprocess. This could lead to confusion in subsequent
1884 lookups in the parent process. There should also be a search_tidyup() at
1885 the end of the subprocess.
1887 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1888 only if the host matched helo_try_verify_hosts, which caused the
1889 verification to occur when the EHLO/HELO command was issued. The ACL just
1890 tested the remembered result. Now, if a previous verification attempt has
1891 not happened, "verify = helo" does it there and then.
1893 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1895 TK/03 Fix log output including CR from clamd.
1897 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1898 exist provoked a memory error which could cause a segfault.
1900 PH/15 Installed PCRE 6.2
1902 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1904 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1905 of the problem. Specifically, suggested +O2 rather than +O1 for the
1908 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1910 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1911 record, the port was not correctly logged when the outgoing_port log
1912 selector was set (it logged the transort's default port).
1914 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1915 fallback_hosts, and "hosts" in the smtp transport.
1917 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1918 host errors such as "Connection refused".
1920 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1921 authentication with radiusclient 0.4.9:
1923 - Error returned from rc_read_config was caught wrongly
1924 - Username/password not passed on to radius server due to wrong length.
1926 The presumption is that some radiusclient API changes for 4.51/PH/17
1927 were not taken care of correctly. The code is still untested by me (my
1928 Linux distribution still has 0.3.2 of radiusclient), but it was
1929 contributed by a Radius user.
1931 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1932 expanding the "port" option of the smtp transport.
1934 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1935 while reading a MIME header. Thanks to Tom Hughes for a patch.
1937 PH/24 Include config.h inside local_scan.h so that configuration settings are
1940 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1941 that in an ACL for RCPT (for example), you can examine exactly what was
1944 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1945 commands, but it was not correctly comparing the address with the actual
1946 client host address. Thus, it would show the EHLO address in Received:
1947 header lines when this was not necessary.
1949 PH/27 Added the % operator to ${eval:}.
1951 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1952 it should be ignoring failures (because with -C, for example, it has lost
1953 privilege). It wasn't ignoring creation failures other than "already
1956 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1959 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1960 because an input line was too long, either on its own, or by virtue of
1961 too many continuations, the temporary file was not being removed, and the
1962 return code was incorrect.
1964 PH/31 Missing "BOOL" in function definition in filtertest.c.
1966 PH/32 Applied Sieve patches from the maintainer.
1968 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1970 PH/33 Added "verify = not_blind".
1972 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1973 Local/Makefile (with some defaults set). These are used in built scripts
1974 such as exicyclog, but they have never been used in the exim_install
1975 script (though there are many overriding facilities there). I have
1976 arranged that the exim_install script now takes note of these two
1979 PH/35 Installed configuration files for Dragonfly.
1981 PH/36 When a locally submitted message by a trusted user did not contain a
1982 From: header, and the sender address was obtained from -f or from an SMTP
1983 MAIL command, and the trusted user did not use -F to supply a sender
1984 name, $originator_name was incorrectly used when constructing a From:
1985 header. Furthermore, $originator_name was used for submission mode
1986 messages from external hosts without From: headers in a similar way,
1987 which is clearly wrong.
1989 PH/37 Added control=suppress_local_fixups.
1991 PH/38 When log_selector = +received_sender was set, and the addition of the
1992 sender made the log line's construction buffer exactly full, or one byte
1993 less than full, an overflow happened when the terminating "\n" was
1996 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1997 when the result of a list match is failure because a DNS lookup failed.
1999 PH/40 RM_COMMAND is now used in the building process.
2001 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2002 the "build-* directories that it finds.
2004 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2005 address in a domain literal was a prefix of an interface address.
2007 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2008 when verifying a sender address, unless rewrite_headers is false.
2010 PH/44 Wrote a long comment about why errors_to addresses are verified as
2011 recipients, not senders.
2013 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2014 the ratelimit ACL was added.
2016 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2018 PH/46 Added extra information about PostgreSQL errors to the error string.
2020 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2021 avoiding the need to install special zones in a real server. This is
2022 backwards compatible; if it can't find the fake resolver, it drops back.
2023 Thus, both old and new test suites can be run.
2025 TF/02 Added util/ratelimit.pl
2027 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2028 clock is set back in time.
2030 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2031 Candler <B.Candler@pobox.com>.
2033 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2034 OK for addresses that are the result of redirections.
2036 PH/48 A number of further additions for the benefit of the new test suite,
2037 including a fake gethostbyname() that interfaces to the fake DNS resolver
2040 TF/06 The fix for widen_domains has also been applied to qualify_single and
2041 search_parents which are the other dnslookup options that can cause
2044 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2047 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2049 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2050 service" if it encountered an MX record with an empty target hostname.
2051 The message is now "an MX or SRV record indicated no SMTP service".
2053 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2054 if the DNS of the sending site is misconfigured. This is quite a
2055 common situation. This change restores the behaviour of treating a
2056 helo verification defer as a failure.
2058 PH/51 If self=fail was set on a router, the bounce message did not include the
2059 actual error message.
2065 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2067 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2068 command itself ended in error, the underlying message about the transport
2069 filter timeout was being overwritten with the pipe command error. Now the
2070 underlying error message should be appended to the second error message.
2072 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2074 PH/02 Reduce the amount of output that "make" produces by default. Full output
2075 can still be requested.
2077 PH/03 The warning log line about a condition test deferring for a "warn" verb
2078 was being output only once per connection, rather than after each
2079 occurrence (because it was using the same function as for successful
2080 "warn" verbs). This seems wrong, so I have changed it.
2082 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2083 it should not have, which might have caused a crash in the right
2084 circumstances, but probably never did.
2086 PH/04 Installed a modified version of Tony Finch's patch to make submission
2087 mode fix the return path as well as the Sender: header line, and to
2088 add a /name= option so that you can make the user's friendly name appear
2091 TF/03 Added the control = fakedefer ACL modifier.
2093 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2094 Mark Lowes for thorough testing.
2096 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2098 TK/03 Merged latest SRS patch from Miles Wilton.
2100 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2101 with the definition in sysexits.h (which is #included earlier).
2102 Fortunately, Exim does not actually use EX_OK. The code used to try to
2103 preserve the sysexits.h value, by assumimg that macro definitions were
2104 scanned for macro replacements. I have been disabused of this notion,
2105 so now the code just undefines EX_OK before #including unistd.h.
2107 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2108 in the smtp transport. When a block could not be written in a single
2109 write() function, the timeout was being re-applied to each part-write.
2110 This seems wrong - if the receiver was accepting one byte at a time it
2111 would take for ever. The timeout is now adjusted when this happens. It
2112 doesn't have to be particularly precise.
2114 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2115 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2117 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2118 without a domain if the check to <postmaster@domain> fails.
2120 SC/01 Eximstats: added -xls and the ability to specify output files
2121 (patch written by Frank Heydlauf).
2123 SC/02 Eximstats: use FileHandles for outputing results.
2125 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2127 SC/04 Eximstats: fixed display of large numbers with -nvr option
2129 SC/05 Eximstats: fixed merging of reports with empty tables.
2131 SC/06 Eximstats: added the -include_original_destination flag
2133 SC/07 Eximstats: removed tabs and trailing whitespace.
2135 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2137 TK/06 MBOX spool code: Add real "From " MBOX separator line
2138 so the .eml file is really in mbox format (even though
2139 most programs do not really care). Patch from Alex Miller.
2141 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2142 The latter is generated from $received_to and is only set if the
2143 message has one envelope recipient. SA can use these headers,
2144 obviously out-of-the-box. Patch from Alex Miller.
2146 PH/08 The ${def test on a variable was returning false if the variable's
2147 value was "0", contrary to what the specification has always said!
2148 The result should be true unless the variable is empty.
2150 PH/09 The syntax error of a character other than { following "${if
2151 def:variable_name" (after optional whitespace) was not being diagnosed.
2152 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2153 accidental colon was present, for example, could give incorrect results.
2155 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2156 result is used (not including appendfile, where other changes are about
2159 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2160 This involved changing a lot of size variables from int to off_t. It
2161 should work with maildirs and everything.
2163 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2164 spamd dying while we are connected to it.
2166 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2169 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2170 function for BDB 4.3.
2172 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2174 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2175 the sources for PCRE have been re-arranged and more files are now
2178 PH/15 The code I had for printing potentially long long variables in PH/11
2179 above was not the best (it lost precision). The length of off_t variables
2180 is now inspected at build time, and an appropriate printing format (%ld
2181 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2182 to be "long long int" or "long int". This is needed for the internal
2183 formatting function string_vformat().
2185 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2186 the configuration file to be ":syslog", then the script "guesses" where
2187 the logs files are, rather than using the compiled in default. In our
2188 case the guess is not the same as the compiled default, so the script
2189 suddenly stopped working when I started to use syslog. The patch checks
2190 to see if log_file_path is "". If so, it attempts to read it from exim
2191 with no configuration file to get the compiled in version, before it
2192 falls back to the previous guessing code."
2194 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2195 implementing BATV in an Exim configuration. See NewStuff for the gory
2198 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2199 Makefile that are specific to HP-UX.
2201 PH/18 If the "use_postmaster" option was set for a recipient callout together
2202 with the "random" option, the postmaster address was used as the MAIL
2203 FROM address for the random test, but not for the subsequent recipient
2204 test. It is now used for both.
2206 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2207 patch removes a few documentation additions to RFC 3028, because the
2208 latest draft now contains them. It adds the new en;ascii-case comparator
2209 and a new error check for 8bit text in MIME parts. Comparator and
2210 require names are now matched exactly. I enabled the subaddress
2211 extension, but it is not well tested yet (read: it works for me)."
2213 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2214 rework some of the code of TK/09 above to avoid the hardwired use of
2215 "%lld" and "long long". Replaced the call to snprintf() with a call to
2218 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2219 records point to non-existent hosts", "retry timeout exceeded", and
2220 "retry time not reached for any host after a long failure period".
2222 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2223 experimental DomainKeys support:
2225 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2226 (2) On an error such as an illegally used "control", the wrong name for
2227 the control was given.
2229 These problems did NOT occur unless DomainKeys support was compiled.
2231 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2233 PH/24 Added ${if match_ip condition.
2235 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2236 databases so that it will be absolutely obvious if a crash occurs in the
2237 DB library. This is a regular occurrence (often caused by mis-matched
2240 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2241 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2242 picked up on a user's system that detects such things. There doesn't seem
2243 to be a gcc warning option for this - only an attribute that has to be
2244 put on the function's prototype. It seems that in Fedora Core 4 they have
2245 set this on a number of new functions. No doubt there will be more in due
2248 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2249 specify a transport. However, if an address that was verified by such a
2250 router was the subject of a callout, Exim crashed because it tried to
2251 read the rcpt_include_affixes from the non-existent transport. Now it
2252 just assumes that the setting of that option is false. This bug was
2253 introduced by 4.51/PH/31.
2255 PH/28 Changed -d+all to exclude +memory, because that information is very
2256 rarely of interest, but it makes the output a lot bigger. People tend to
2257 do -d+all out of habit.
2259 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2260 code in os-type was giving problems when libc.so lives in lib64, like on
2263 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2264 aren't the modern standard, and it seems that some systems' include files
2265 don't always have them. Exim was already checking for some of the newer
2266 ones like T_AAAA, and defining it itself. I've added checks for all the
2267 record types that Exim uses.
2269 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2270 not automatically generating a new one, as it is supposed to. This
2271 prevented TLS from working. If the file did exist, but contained invalid
2272 data, a new version was generated, as expected. It was only the case of a
2273 non-existent file that was broken.
2275 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2276 with a change in libdomainkeys > 0.64.
2278 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2279 from DNS. If the selector record carries the flag, it now has
2280 precedence over the domain-wide flag.
2282 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2284 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2285 the use of a port name that isn't defined in /etc/services) occurred, the
2286 message was deferred as in a normal delivery, and thus remained on the
2287 spool, instead of being failed because of the mua_wrapper setting. This
2288 is now fixed, and I tidied up some of the mua_wrapper messages at the
2291 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2292 the messages in a hash of arrays rather than using individual hashes.
2293 This is a bit cleaner and results in dramatic memory savings, albeit
2294 at a slight CPU cost.
2296 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2297 as requested by Marc Sherman.
2299 SC/10 Eximstats: added histograms for user specified patterns as requested
2302 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2304 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2305 fopen() in the content-scanning modules that did not already have it.
2311 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2312 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2314 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2316 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2318 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2319 to test Sieve filters that use "vacation".
2321 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2322 that changes the way the GnuTLS parameters are stored in the cache file.
2323 The new format can be generated externally. For backward compatibility,
2324 if the data in the cache doesn't make sense, Exim assumes it has read an
2325 old-format file, and it generates new data and writes a new file. This
2326 means that you can't go back to an older release without removing the
2329 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2330 work if there are any delivery delays because "one_time" forces the
2331 parent to be marked "delivered", so its unseen clone is never tried
2332 again. For this reason, Exim now forbids the simultaneous setting of
2335 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2336 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2337 entry if you want to know the details. The fix, however, neglected to
2338 consider the case when local delivery batching is involved. The test for
2339 "previously delivered" was not happening when checking to see if an
2340 address could be batched with a previous (undelivered) one; under
2341 certain circumstances this could lead to multiple deliveries to the same
2344 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2345 in its include files, and this causes problems building Exim.
2347 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2348 header_syntax) but Exim was just ignoring anything given after a slash.
2349 In particular, this caused confusion with an attempt to use "verify =
2350 reverse_host_lookup/defer_ok". An error is now given when options are
2351 supplied for verify items that do not have them. (Maybe reverse_host_
2352 lookup should have a defer_ok option, but that's a different point.)
2354 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2355 defined by RFC 821) to 2048, because there were problems with some AUTH
2356 commands, and RFC 1869 says the size should be increased for extended
2357 SMTP commands that take arguments.
2359 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2362 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2363 "unknown" error; now it says that the functionality isn't in the binary.
2365 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2366 an address' error message when a string expansion fails (syntax or
2367 whatever). Otherwise the password may appear in the log. Following change
2368 PH/42 below, there is no longer a chance of it appearing in a bounce
2371 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2373 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2374 of its addresses was ever tried. (Bugzilla bug #2.)
2376 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2377 the result incorrectly in the debug output. (It correctly added a newline
2378 to what was transported.)
2380 TF/01 Added $received_time.
2382 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2383 commented out examples of how to interface to a virus scanner and to
2384 SpamAssassin. Also added commented examples of av_scanner and
2385 spamd_address settings.
2387 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2388 and controls are allowed in which ACLs. There were a couple of minor
2389 errors. Some of the entries in the conditions table (which is a table of
2390 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2391 negation of where the condition IS allowed.
2393 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2395 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2396 header file does not have a version number, so I've had to invent a new
2397 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2398 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2399 radiusclient), but it was contributed by a Radius user.
2401 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2402 files or directories, for OpenSSL.
2404 PH/19 When an Exim process that is running as root has to create an Exim log
2405 file, it does so in a subprocess that runs as exim:exim so as to get the
2406 ownership right at creation (otherwise, other Exim processes might see
2407 the file with the wrong ownership). There was no test for failure of this
2408 fork() call, which would lead to the process getting stuck as it waited
2409 for a non-existent subprocess. Forks do occasionally fail when resources
2410 run out. I reviewed all the other calls to fork(); they all seem to check
2413 PH/20 When checking for unexpected SMTP input at connect time (before writing
2414 the banner), Exim was not dealing correctly with a non-positive return
2415 from the read() function. If the client had disconnected by this time,
2416 the result was a log entry for a synchronization error with an empty
2417 string after "input=" when read() returned zero. If read() returned -1
2418 (an event I could not check), uninitialized data bytes were printed.
2419 There were reports of junk text (parts of files, etc) appearing after
2422 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2424 PH/22 Added support for macro redefinition, and (re)definition in between
2425 driver and ACL definitions.
2427 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2428 forgetting to use the resulting value; it was using the unexpanded value.
2430 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2431 hadn't been configured. The fix is from Juergen Kreileder, who
2432 understands it better than I do:
2434 "Here's what I see happening with three configured cyrus_sasl
2435 authenticators configured (plain, login, cram-md5):
2437 On startup auth_cyrus_sasl_init() gets called for each of these.
2438 This means three calls to sasl_listmech() without a specified mech_list.
2439 => SASL tests which mechs of all available mechs actually work
2440 => three warnings about OTP not working
2441 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2443 With the patch, sasl_listmech() also gets called three times. But now
2444 SASL's mech_list option is set to the server_mech specified in the the
2445 authenticator. Or in other words, the answer from sasl_listmech()
2446 gets limited to just the mech you're testing for (which is different
2448 => the return list contains just 'plain' or 'login', 'cram-md5' or
2449 nothing depending on the value of ob->server_mech.
2451 I've just tested the patch: Authentication still works fine,
2452 unavailable mechs specified in the exim configuration are still
2453 caught, and the auth.log warnings about OTP are gone."
2455 PH/25 When debugging is enabled, the contents of the command line are added
2456 to the debugging output, even when log_selector=+arguments is not
2459 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2460 answer is "GNU", and only if the return is "GNU/something" is the answer
2463 PH/27 $acl_verify_message is now set immediately after the failure of a
2464 verification in an ACL, and so is available in subsequent modifiers. In
2465 particular, the message can be preserved by coding like this:
2467 warn !verify = sender
2468 set acl_m0 = $acl_verify_message
2470 Previously, $acl_verify_message was set only while expanding "message"
2471 and "log_message" when a very denied access.
2473 PH/28 Modified OS/os.c-Linux with
2475 -#ifndef OS_LOAD_AVERAGE
2476 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2478 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2479 nomenclature these days.)
2481 PH/29 Installed patch from the Sieve maintainer that adds the options
2482 sieve_useraddress and sieve_subaddress to the redirect router.
2484 PH/30 In these circumstances:
2485 . Two addresses routed to the same list of hosts;
2486 . First host does not offer TLS;
2487 . First host accepts first address;
2488 . First host gives temporary error to second address;
2489 . Second host offers TLS and a TLS session is established;
2490 . Second host accepts second address.
2491 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2492 and peerdn, if requested) that were in fact used only for the second
2495 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2496 attention to any local part prefix or suffix that was matched by the
2497 router that accepted the address. It now behaves in the same way as it
2498 does for delivery: the affixes are removed from the local part unless
2499 rcpt_include_affixes is set on the transport.
2501 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2502 timeout during the DATA phase of an incoming message.
2504 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2505 applied a patch sanctioned by the Sieve maintainer.
2507 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2508 the uid or gid is negative. A case of a negative gid caused this to be
2509 noticed. The fix allows for either to be negative.
2511 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2512 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2515 PH/36 The change PH/12 above was broken. Fixed it.
2517 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2518 the grounds that routing the same address twice would always produce the
2519 same answer. This might have been true once, but it is certainly no
2520 longer true now. Routing a child address may depend on the previous
2521 routing that produced that child. Some complicated redirection strategies
2522 went wrong when messages had multiple recipients, and made Exim's
2523 behaviour dependent on the order in which the addresses were given.
2525 I have moved the duplicate checking until after the routing is complete.
2526 Exim scans the addresses that are assigned to local and remote
2527 transports, and removes any duplicates. This means that more work will be
2528 done, as duplicates will always all be routed, but duplicates are
2529 presumably rare, so I don't expect this is of any significance.
2531 For deliveries to pipes, files, and autoreplies, the duplicate checking
2532 still happens during the routing process, since they are not going to be
2535 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2536 It corrects a timeout issue with spamd. This is Ian's comment: "The
2537 background is that sometimes spamd either never reads data from a
2538 connection it has accepted, or it never writes response data. The exiscan
2539 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2540 blindly assumes that writes won't block so it may never time out."
2542 PH/39 Allow G after quota size as well as K and M.
2544 PH/40 The value set for $authenticated_id in an authenticator may not contain
2545 binary zeroes or newlines because the value is written to log lines and
2546 to spool files. There was no check on this. Now the value is run through
2547 the string_printing() function so that such characters are converted to
2548 printable escape sequences.
2550 PH/41 $message_linecount is a new variable that contains the total number of
2551 lines in the message. Compare $body_linecount, which is the count for the
2554 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2555 bounce and delay warning messages, except in certain special cases, which
2558 (a) An SMTP error message from a remote host;
2559 (b) A message specified in a :fail: redirection;
2560 (c) A message specified in a "fail" command in a system filter;
2561 (d) A message specified in a FAIL return from the queryprogram router;
2562 (e) A message specified by the cannot_route_message router option.
2564 In these cases only, Exim does include the error details in bounce and
2565 warning messages. There are also a few cases where bland messages such
2566 as "unrouteable address" or "local delivery error" are given.
2568 PH/43 $value is now also set for the "else" part of a ${run expansion.
2570 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2571 being worked on, but at least Exim now implements the latest version to
2574 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2575 process to complete was treated as a delivery failure, a timeout while
2576 writing the message to the pipe was logged, but erroneously treated as a
2577 successful delivery. Such timeouts include transport filter timeouts. For
2578 consistency with the overall process timeout, these timeouts are now
2579 treated as errors, giving rise to delivery failures by default. However,
2580 there is now a new Boolean option for the pipe transport called
2581 timeout_defer, which, if set TRUE, converts the failures into defers for
2582 both kinds of timeout. A transport filter timeout is now identified in
2585 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2586 systems where "make" and "gmake" are different, calling "gmake" at top
2587 level broke things. I've arranged for the value of $(MAKE) to be passed
2588 from the Makefile to this script so that it can call the same version of
2592 A note about Exim versions 4.44 and 4.50
2593 ----------------------------------------
2595 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2596 changes of various kinds. As a consequence, a big documentation update was
2597 needed. This delayed the release for rather longer than seemed good, especially
2598 in the light of a couple of (minor) security issues. Therefore, the changes
2599 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2600 release. So 4.44 and 4.50 are in effect two different branches that both start
2603 I have left the 4.50 change log unchanged; it contains all the changes since
2604 4.43. The change log for 4.44 is below; many of its items are identical to
2605 those for 4.50. This seems to be the most sensible way to preserve the
2606 historical information.
2612 1. Minor wording change to the doc/README.SIEVE file.
2614 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2615 computation of the current number of files was incorrect.
2617 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2618 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2621 4. Give more explanation in the error message when the command for a transport
2622 filter fails to execute.
2624 5. There are several places where Exim runs a non-Exim command in a
2625 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2626 was being done only for the command run by the queryprogram router. It is
2627 now done for all such subprocesses. The other cases are: ${run, transport
2628 filters, and the commands run by the lmtp and pipe transports.
2630 6. Added CONFIGURE_GROUP build-time option.
2632 7. Some older OS have a limit of 256 on the maximum number of file
2633 descriptors. Exim was using setrlimit() to set 1000 as a large value
2634 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2635 systems. I've change it so that if it can't get 1000, it tries for 256.
2637 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2638 was an oversight, and furthermore, ever since the addition of extra
2639 controls (e.g. 4.43/32), the checks on when to allow different forms of
2640 "control" were broken. There should now be diagnostics for all cases when a
2641 control that does not make sense is encountered.
2643 9. Added the /retain_sender option to "control=submission".
2645 10. $recipients is now available in the predata ACL (oversight).
2647 11. Tidy the search cache before the fork to do a delivery from a message
2648 received from the command line. Otherwise the child will trigger a lookup
2649 failure and thereby defer the delivery if it tries to use (for example) a
2650 cached ldap connection that the parent has called unbind on.
2652 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2653 of $address_data from the recipient verification was clobbered by the
2654 sender verification.
2656 13. The value of address_data from a sender verification is now available in
2657 $sender_address_data in subsequent conditions in the ACL statement.
2659 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2661 15. Added a new option "connect=<time>" to callout options, to set a different
2664 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2665 was its contents. (It was OK if the option was not defined at all.)
2667 17. A "Completed" log line is now written for messages that are removed from
2668 the spool by the -Mrm option.
2670 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2671 information about exactly what failed.
2673 19. Added -dd to debug only the daemon process.
2675 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2676 handles timeouts, both on the server side and network timeouts. Renamed the
2677 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2679 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2680 It is now set to "smtps".
2682 22. $host_address is now set to the target address during the checking of
2683 ignore_target_hosts.
2685 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2686 being passed; this would have caused $sender_host_name to have been used if
2687 matching the list had actually called for a host name (not very likely,
2688 since this list is usually IP addresses). A host name is now passed as
2691 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2692 code that specifies a non-restarting handler (typically sigaction() in
2693 modern systems) in an attempt to fix a rare and obscure crash bug.
2695 25. Narrowed the window for a race in the daemon that could cause it to ignore
2696 SIGCHLD signals. This is not a major problem, because they are used only to
2697 wake it up if nothing else does.
2699 26. A malformed maildirsize file could cause Exim to calculate negative values
2700 for the mailbox size or file count. Odd effects could occur as a result.
2701 The maildirsize information is now recalculated if the size or filecount
2704 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2705 support for a long time. Removed HAVE_SYS_VFS_H.
2707 28. Installed the latest version of exipick from John Jetmore.
2709 29. In an address list, if the pattern was not a regular expression, an empty
2710 subject address (from a bounce message) matched only if the pattern was an
2711 empty string. Non-empty patterns were not even tested. This was the wrong
2712 because it is perfectly reasonable to use an empty address as part of a
2713 database query. An empty address is now tested by patterns that are
2714 lookups. However, all the other forms of pattern expect the subject to
2715 contain a local part and a domain, and therefore, for them, an empty
2716 address still always fails if the pattern is not itself empty.
2718 30. Exim went into a mad DNS loop when attempting to do a callout where the
2719 host was specified on an smtp transport, and looking it up yielded more
2720 than one IP address.
2722 31. Re-factored the code for checking spool and log partition space into a
2723 function that finds that data and another that does the check. The former
2724 is then used to implement four new variables: $spool_space, $log_space,
2725 $spool_inodes, and $log_inodes.
2727 32. The RFC2047 encoding function was originally intended for short strings
2728 such as real names; it was not keeping to the 75-character limit for
2729 encoded words that the RFC imposes. It now respects the limit, and
2730 generates multiple encoded words if necessary. To be on the safe side, I
2731 have increased the buffer size for the ${rfc2047: expansion operator from
2734 33. It is now permitted to omit both strings after an "if" condition; if the
2735 condition is true, the result is "true". As before, when the second string
2736 is omitted, a false condition yields an empty string. This makes it less
2737 cumbersome to write custom ACL and router conditions.
2739 34. Failure to deliver a bounce message always caused it to be frozen, even if
2740 there was an errors_to setting on the router. The errors_to setting is now
2743 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2744 canonical form (fully expanded) before being placed in
2745 $sender_host_address.
2747 36. The table in the code that translates DNS record types into text (T_A to
2748 "A" for instance) was missing entries for NS and CNAME. It is just possible
2749 that this could have caused confusion if both these types were looked up
2750 for the same domain, because the text type is used as part of Exim's
2751 per-process caching. But the chance of anyone hitting this buglet seems
2754 37. The dnsdb lookup has been extended in a number of ways.
2756 (1) There is a new type, "zns", which walks up the domain tree until it
2757 finds some nameserver records. It should be used with care.
2759 (2) There is a new type, "mxh", which is like "mx" except that it returns
2760 just the host names, not the priorities.
2762 (3) It is now possible to give a list of domains (or IP addresses) to be
2763 looked up. The behaviour when one of the lookups defers can be
2764 controlled by a keyword.
2766 (4) It is now possible to specify the separator character for use when
2767 multiple records are returned.
2769 38. The dnslists ACL condition has been extended: it is now possible to supply
2770 a list of IP addresses and/or domains to be looked up in a particular DNS
2773 39. Added log_selector=+queue_time_overall.
2775 40. When running the queue in the test harness, wait just a tad after forking a
2776 delivery process, to get repeatability of debugging output.
2778 41. Include certificate and key file names in error message when GnuTLS fails
2779 to set them up, because the GnuTLS error message doesn't include the name
2780 of the failing file when there is a problem reading it.
2782 42. Allow both -bf and -bF in the same test run.
2784 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2786 44. The "Exiscan patch" is now merged into the mainline Exim source.
2788 45. Sometimes the final signoff response after QUIT could fail to get
2789 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2790 < 0 before doing a fflush(). This bug looks as though it goes back to the
2791 introduction of TLS in release 3.20, but "sometimes" must have been rare
2792 because the tests only now provoked it.
2794 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2795 (this can affect the format of dates).
2797 47. exim_tidydb, when checking for the continued existence of a message for
2798 which it has found a message-specific retry record, was not finding
2799 messages that were in split spool directories. Consequently, it was
2800 deleting retry records that should have stayed in existence.
2802 48. Steve fixed some bugs in eximstats.
2804 49. The SPA authentication driver was not abandoning authentication and moving
2805 on to the next authenticator when an expansion was forced to fail,
2806 contradicting the general specification for all authenticators. Instead it
2807 was generating a temporary error. It now behaves as specified.
2809 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2810 (the order specifies the preference for clients). The order is now AES256,
2811 AES128, 3DES, ARCFOUR128.
2813 51. Small patch to Sieve code - explicitly set From: when generating an
2816 52. Exim crashed if a remote delivery caused a very long error message to be
2817 recorded - for instance if somebody sent an entire SpamAssassin report back
2818 as a large number of 550 error lines. This bug was coincidentally fixed by
2819 increasing the size of one of Exim's internal buffers (big_buffer) that
2820 happened as part of the Exiscan merge. However, to be on the safe side, I
2821 have made the code more robust (and fixed the comments that describe what
2824 53. Now that there can be additional text after "Completed" in log lines (if
2825 the queue_time_overall log selector is set), a one-byte patch to exigrep
2826 was needed to allow it to recognize "Completed" as not the last thing in
2829 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2830 patch that reportedly fixes this has been added. I am not expert enough to
2831 create a test for it. This is what the patch creator wrote:
2833 "I found a little strange behaviour of ldap code when working with
2834 Windows 2003 AD Domain, where users was placed in more than one
2835 Organization Units. When I tried to give exim partial DN, the exit code
2836 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2837 But simultaneously result of request was absolutely normal ldap result,
2838 so I produce this patch..."
2840 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2841 REFERENCE, so I have modified the code to exclude the patch when that macro
2844 55. Some experimental protocols are using DNS PTR records for new purposes. The
2845 keys for these records are domain names, not reversed IP addresses. The
2846 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2847 leaves it alone. Component reversal etc. now happens only for IP addresses.
2850 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2852 57. Double the size of the debug message buffer (to 2048) so that more of very
2853 long debug lines gets shown.
2855 58. The exicyclog utility now does better if the number of log files to keep
2856 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2858 59. Two changes related to the smtp_active_hostname option:
2860 (1) $smtp_active_hostname is now available as a variable.
2861 (2) The default for smtp_banner uses $smtp_active_hostname instead
2862 of $primary_hostname.
2864 60. The host_aton() function is supposed to be passed a string that is known
2865 to be a valid IP address. However, in the case of IPv6 addresses, it was
2866 not checking this. This is a hostage to fortune. Exim now panics and dies
2867 if the condition is not met. A case was found where this could be provoked
2868 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2869 components; fortuitously, this particular loophole had already been fixed
2870 by change 4.50/55 above.
2872 If there are any other similar loopholes, the new check in host_aton()
2873 itself should stop them being exploited. The report I received stated that
2874 data on the command line could provoke the exploit when Exim was running as
2875 exim, but did not say which command line option was involved. All I could
2876 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2877 running as the user.
2880 61. There was a buffer overflow vulnerability in the SPA authentication code
2881 (which came originally from the Samba project). I have added a test to the
2882 spa_base64_to_bits() function which I hope fixes it.
2885 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2886 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2888 63. The daemon start-up calls getloadavg() while still root for those OS that
2889 need the first call to be done as root, but it missed one case: when
2890 deliver_queue_load_max is set with deliver_drop_privilege. This is
2891 necessary for the benefit of the queue runner, because there is no re-exec
2892 when deliver_drop_privilege is set.
2894 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2895 This has been fixed.
2897 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2898 was in use, was not putting the data itself into the right store pool;
2899 consequently, it could be overwritten for a subsequent message in the same
2900 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2903 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2905 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2906 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2907 the function were treating the return as a boolean value, which happened to
2908 work because 0=false and not-0=true, but is not correct code.
2910 68. The host_aton() function was not handling scoped IPv6 addresses (those
2911 with, for example, "%eth0" on the end) correctly.
2913 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2914 negated items (that is, ~something) in unsigned ints. Some compilers
2915 apparently mutter when there is no cast.
2917 70. If an address verification called from an ACL failed, and did not produce a
2918 user-specific message (i.e. there was only a "system" message), nothing was
2919 put in $acl_verify_message. In this situation, it now puts the system
2922 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2923 session; change 4.31/43 added the unwanted input to the log line - except
2924 that it did not do this in the start of session case. It now does.
2926 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2927 This is wrong and can cause the other end to generate a synchronization
2928 error if it is another Exim or anything else that does the synchronization
2929 check. A QUIT command is no longer sent after a timeout.
2931 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2932 during host lookups.
2934 74. The defer_ok option of callout verification was not working if it was used
2935 when verifying addresses in header lines, that is, for this case:
2937 verify = header_sender/callout=defer_ok
2939 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2940 those file descriptors could be used for SMTP connections. If anything
2941 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2942 could be sent to the SMTP client, causing chaos. The daemon now opens
2943 stdin, stdout, and stderr to /dev/null when it puts itself into the
2946 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2947 log by default. The user can override this with suitable Perl magic.
2949 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2950 the log message when discard triggers, was not working for the DATA ACL or
2951 for the non-SMTP ACL.
2953 78. Error message wording change in sieve.c.
2955 79. If smtp_accept_max_per_host was set, the number of connections could be
2956 restricted to fewer than expected, because the daemon was trying to set up
2957 a new connection before checking whether the processes handling previous
2958 connections had finished. The check for completed processes is now done
2959 earlier. On busy systems, this bug wouldn't be noticed because something
2960 else would have woken the daemon, and it would have reaped the completed
2963 80. If a message was submitted locally by a user whose login name contained one
2964 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2965 It caused a spool format error. I have fixed the spool reading code. A
2966 related problem was that the "from" clause in the Received: line became
2967 illegal because of the space(s). It is now covered by ${quote_local_part.
2969 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2972 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2974 83. Patch from Sieve maintainer to fix unterminated string problem in
2975 "vacation" handling.
2977 84. Some minor changes to the Linux configuration files to help with other
2978 OS variants using glibc.
2980 85. One more patch for Sieve to update vacation handling to latest spec.
2983 ----------------------------------------------------
2984 See the note above about the 4.44 and 4.50 releases.
2985 ----------------------------------------------------
2991 1. Change 4.43/35 introduced a bug that caused file counts to be
2992 incorrectly computed when quota_filecount was set in an appendfile
2995 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2996 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2999 3. Give more explanation in the error message when the command for a transport
3000 filter fails to execute.
3002 4. There are several places where Exim runs a non-Exim command in a
3003 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3004 was being done only for the command run by the queryprogram router. It is
3005 now done for all such subprocesses. The other cases are: ${run, transport
3006 filters, and the commands run by the lmtp and pipe transports.
3008 5. Some older OS have a limit of 256 on the maximum number of file
3009 descriptors. Exim was using setrlimit() to set 1000 as a large value
3010 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3011 systems. I've change it so that if it can't get 1000, it tries for 256.
3013 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3014 was an oversight, and furthermore, ever since the addition of extra
3015 controls (e.g. 4.43/32), the checks on when to allow different forms of
3016 "control" were broken. There should now be diagnostics for all cases when a
3017 control that does not make sense is encountered.
3019 7. $recipients is now available in the predata ACL (oversight).
3021 8. Tidy the search cache before the fork to do a delivery from a message
3022 received from the command line. Otherwise the child will trigger a lookup
3023 failure and thereby defer the delivery if it tries to use (for example) a
3024 cached ldap connection that the parent has called unbind on.
3026 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3027 of $address_data from the recipient verification was clobbered by the
3028 sender verification.
3030 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3031 was its contents. (It was OK if the option was not defined at all.)
3033 11. A "Completed" log line is now written for messages that are removed from
3034 the spool by the -Mrm option.
3036 12. $host_address is now set to the target address during the checking of
3037 ignore_target_hosts.
3039 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3040 being passed; this would have caused $sender_host_name to have been used if
3041 matching the list had actually called for a host name (not very likely,
3042 since this list is usually IP addresses). A host name is now passed as
3045 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3046 code that specifies a non-restarting handler (typically sigaction() in
3047 modern systems) in an attempt to fix a rare and obscure crash bug.
3049 15. Narrowed the window for a race in the daemon that could cause it to ignore
3050 SIGCHLD signals. This is not a major problem, because they are used only to
3051 wake it up if nothing else does.
3053 16. A malformed maildirsize file could cause Exim to calculate negative values
3054 for the mailbox size or file count. Odd effects could occur as a result.
3055 The maildirsize information is now recalculated if the size or filecount
3058 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3059 support for a long time. Removed HAVE_SYS_VFS_H.
3061 18. Updated exipick to current release from John Jetmore.
3063 19. Allow an empty sender to be matched against a lookup in an address list.
3064 Previously the only cases considered were a regular expression, or an
3067 20. Exim went into a mad DNS lookup loop when doing a callout where the
3068 host was specified on the transport, if the DNS lookup yielded more than
3071 21. The RFC2047 encoding function was originally intended for short strings
3072 such as real names; it was not keeping to the 75-character limit for
3073 encoded words that the RFC imposes. It now respects the limit, and
3074 generates multiple encoded words if necessary. To be on the safe side, I
3075 have increased the buffer size for the ${rfc2047: expansion operator from
3078 22. Failure to deliver a bounce message always caused it to be frozen, even if
3079 there was an errors_to setting on the router. The errors_to setting is now
3082 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3083 canonical form (fully expanded) before being placed in
3084 $sender_host_address.
3086 24. Updated eximstats to version 1.33
3088 25. Include certificate and key file names in error message when GnuTLS fails
3089 to set them up, because the GnuTLS error message doesn't include the name
3090 of the failing file when there is a problem reading it.
3092 26. Expand error message when OpenSSL has problems setting up cert/key files.
3095 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3096 (this can affect the format of dates).
3098 28. exim_tidydb, when checking for the continued existence of a message for
3099 which it has found a message-specific retry record, was not finding
3100 messages that were in split spool directories. Consequently, it was
3101 deleting retry records that should have stayed in existence.
3103 29. eximstats updated to version 1.35
3104 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3105 1.35 - bugfix such that pie charts by volume are generated correctly
3107 30. The SPA authentication driver was not abandoning authentication and moving
3108 on to the next authenticator when an expansion was forced to fail,
3109 contradicting the general specification for all authenticators. Instead it
3110 was generating a temporary error. It now behaves as specified.
3112 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3113 (the order specifies the preference for clients). The order is now AES256,
3114 AES128, 3DES, ARCFOUR128.
3116 31. Small patch to Sieve code - explicitly set From: when generating an
3119 32. Exim crashed if a remote delivery caused a very long error message to be
3120 recorded - for instance if somebody sent an entire SpamAssassin report back
3121 as a large number of 550 error lines. This bug was coincidentally fixed by
3122 increasing the size of one of Exim's internal buffers (big_buffer) that
3123 happened as part of the Exiscan merge. However, to be on the safe side, I
3124 have made the code more robust (and fixed the comments that describe what
3127 33. Some experimental protocols are using DNS PTR records for new purposes. The
3128 keys for these records are domain names, not reversed IP addresses. The
3129 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3130 leaves it alone. Component reversal etc. now happens only for IP addresses.
3133 34. The host_aton() function is supposed to be passed a string that is known
3134 to be a valid IP address. However, in the case of IPv6 addresses, it was
3135 not checking this. This is a hostage to fortune. Exim now panics and dies
3136 if the condition is not met. A case was found where this could be provoked
3137 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3138 components; fortuitously, this particular loophole had already been fixed
3139 by change 4.50/55 or 4.44/33 above.
3141 If there are any other similar loopholes, the new check in host_aton()
3142 itself should stop them being exploited. The report I received stated that
3143 data on the command line could provoke the exploit when Exim was running as
3144 exim, but did not say which command line option was involved. All I could
3145 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3146 running as the user.
3149 35. There was a buffer overflow vulnerability in the SPA authentication code
3150 (which came originally from the Samba project). I have added a test to the
3151 spa_base64_to_bits() function which I hope fixes it.
3154 36. The daemon start-up calls getloadavg() while still root for those OS that
3155 need the first call to be done as root, but it missed one case: when
3156 deliver_queue_load_max is set with deliver_drop_privilege. This is
3157 necessary for the benefit of the queue runner, because there is no re-exec
3158 when deliver_drop_privilege is set.
3160 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3161 was in use, was not putting the data itself into the right store pool;
3162 consequently, it could be overwritten for a subsequent message in the same
3163 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3166 38. Sometimes the final signoff response after QUIT could fail to get
3167 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3168 < 0 before doing a fflush(). This bug looks as though it goes back to the
3169 introduction of TLS in release 3.20, but "sometimes" must have been rare
3170 because the tests only now provoked it.
3176 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3177 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3178 Now it returns an integer. A number of calls were still expecting a T/F
3179 return. Fortuitously, in all cases, the tests worked in OK situations,
3180 which is the norm. However, things would have gone wrong on any write
3181 failures on the smtp file descriptor. This function is used when sending
3182 messages over SMTP and also when doing verify callouts.
3184 2. When Exim is called to do synchronous delivery of a locally submitted
3185 message (the -odf or -odi options), it no longer closes stderr before doing
3188 3. Implemented the mua_wrapper option.
3190 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3192 5. Implemented the functions header_remove(), header_testname(),
3193 header_add_at_position(), and receive_remove_recipient(), and exported them
3196 6. If an ACL "warn" statement specified the addition of headers, Exim already
3197 inserted X-ACL-Warn: at the start if there was no header name. However, it
3198 was not making this test for the second and subsequent header lines if
3199 there were newlines in the string. This meant that an invalid header could
3200 be inserted if Exim was badly configured.
3202 7. Allow an ACL "warn" statement to add header lines at the start or after all
3203 the Received: headers, as well as at the end.
3205 8. Added the rcpt_4xx retry error code.
3207 9. Added postmaster_mailfrom=xxx to callout verification option.
3209 10. Added mailfrom=xxxx to the callout verification option, for verify=
3212 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3213 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3215 12. Inserted some casts to stop certain compilers warning when using pointer
3216 differences as field lengths or precisions in printf-type calls (mostly
3217 affecting debugging statements).
3219 13. Added optional readline() support for -be (dynamically loaded).
3221 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3222 same clock tick as a message's arrival, so that its received time was the
3223 same as the "first fail" time on the retry record, and that message
3224 remained on the queue past the ultimate address timeout, every queue runner
3225 would try a delivery (because it was past the ultimate address timeout) but
3226 after another failure, the ultimate address timeout, which should have then
3227 bounced the address, did not kick in. This was a "< instead of <=" error;
3228 in most cases the first failure would have been in the next clock tick
3229 after the received time, and all would be well.
3231 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3232 being recognized when the domain list was tested by the match_domain
3233 condition in an expansion string.
3235 16. Added the ${str2b64: operator.
3237 17. Exim was always calling setrlimit() to set a large limit for the number of
3238 processes, without checking whether the existing limit was already
3239 adequate. (It did check for the limit on file descriptors.) Furthermore,
3240 errors from getrlimit() and setrlimit() were being ignored. Now they are
3241 logged to the main and panic logs, but Exim does carry on, to try to do its
3242 job under whatever limits there are.
3244 18. Imported PCRE 5.0.
3246 19. Trivial typo in log message " temporarily refused connection" (the leading
3249 20. If the log selector return_path_on_delivery was set and an address was
3250 redirected to /dev/null, the delivery process crashed because it assumed
3251 that a return path would always be set for a "successful" delivery. In this
3252 case, the whole delivery is bypassed as an optimization, and therefore no
3255 21. Internal re-arrangement: the function for sending a challenge and reading
3256 a response while authentication was assuming a zero-terminated challenge
3257 string. It's now changed to take a pointer and a length, to allow for
3258 binary data in such strings.
3260 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3262 23. Exim was not respecting finduser_retries when seeking the login of the
3263 uid under which it was called; it was always trying 10 times. (The default
3264 setting of finduser_retries is zero.) Also, it was sleeping after the final
3265 failure, which is pointless.
3267 24. Implemented tls_on_connect_ports.
3269 25. Implemented acl_smtp_predata.
3271 26. If the domain in control=submission is set empty, Exim assumes that the
3272 authenticated id is a complete email address when it generates From: or
3273 Sender: header lines.
3275 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3276 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3277 chown and chgrp in /bin and hostname in /usr/bin.
3279 28. Exim was keeping the "process log" file open after each use, just as it
3280 does for the main log. This opens the possibility of it remaining open for
3281 long periods when the USR1 signal hits a daemon. Occasional processlog
3282 errors were reported, that could have been caused by this. Anyway, it seems
3283 much more sensible not to leave this file open at all, so that is what now
3286 29. The long-running daemon process does not normally write to the log once it
3287 has entered its main loop, and it closes the log before doing so. This is
3288 so that log files can straightforwardly be renamed and moved. However,
3289 there are a couple of unusual error situations where the daemon does write
3290 log entries, and I had neglected to close the log afterwards.
3292 30. The text of an SMTP error response that was received during a remote
3293 delivery was being truncated at 512 bytes. This is too short for some of
3294 the long messages that one sometimes sees. I've increased the limit to
3297 31. It is now possible to make retry rules that apply only when a message has a
3298 specific sender, in particular, an empty sender.
3300 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3301 it possible to be selective about when SMTP synchronization is enforced.
3303 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3305 32. Implemented hosts_connection_nolog.
3307 33. Added an ACL for QUIT.
3309 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3312 35. Added mailbox_size and mailbox_filecount to appendfile.
3314 36. Added control = no_multiline_responses to ACLs.
3316 37. There was a bug in the logic of the code that waits for the clock to tick
3317 in the case where the clock went backwards by a substantial amount such
3318 that the microsecond fraction of "now" was more than the microsecond
3319 fraction of "then" (but the whole seconds number was less).
3321 38. Added support for the libradius Radius client library this is found on
3322 FreeBSD (previously only the radiusclient library was supported).
3328 1. When certain lookups returned multiple values in the form name=value, the
3329 quoting of the values was not always being done properly. Specifically:
3330 (a) If the value started with a double quote, but contained no whitespace,
3332 (b) If the value contained whitespace other than a space character (i.e.
3333 tabs or newlines or carriage returns) it was not quoted.
3334 This fix has been applied to the mysql and pgsql lookups by writing a
3335 separate quoting function and calling it from the lookup code. The fix
3336 should probably also be applied to nisplus, ibase and oracle lookups, but
3337 since I cannot test any of those, I have not disturbed their existing code.
3339 2. A hit in the callout cache for a specific address caused a log line with no
3340 reason for rejecting RCPT. Now it says "Previous (cached) callout
3341 verification failure".
3343 3. There was an off-by-one bug in the queryprogram router. An over-long
3344 return line was truncated at 256 instead of 255 characters, thereby
3345 overflowing its buffer with the terminating zero. As well as fixing this, I
3346 have increased the buffer size to 1024 (and made a note to document this).
3348 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3349 when Exim is waiting for an SMTP response from a remote server, Exim
3350 restarts its select() call on the socket, thereby resetting its timeout.
3351 This is not a problem when such interrupts are rare. Somebody set up a cron
3352 job to run exiwhat every 2 minutes, which is less than the normal select()
3353 timeout (5 or 10 minutes). This meant that the select() timeout never
3354 kicked in because it was always reset. I have fixed this by comparing the
3355 time when an interrupt arrives with the time at the start of the first call
3356 to select(). If more time than the timeout has elapsed, the interrupt is
3357 treated as a timeout.
3359 5. Some internal re-factoring in preparation for the addition of Sieve
3360 extensions (by MH). In particular, the "personal" test is moved to a
3361 separate function, and given an option for scanning Cc: and Bcc: (which is
3362 not set for Exim filters).
3364 6. When Exim created an email address using the login of the caller as the
3365 local part (e.g. when creating a From: or Sender: header line), it was not
3366 quoting the local part when it contained special characters such as @.
3368 7. Installed new OpenBSD configuration files.
3370 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3371 try to make them clearer.
3373 9. Callout options, other than the timeout value, were being ignored when
3374 verifying sender addresses in header lines. For example, when using
3376 verify = header_sender/callout=no_cache
3378 the cache was (incorrectly) being used.
3380 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3381 only the Cygwin environment.
3383 11. When return_path_on_delivery was set as a log selector, if different remote
3384 addresses in the same message used different return paths and parallel
3385 remote delivery occurred, the wrong values would sometimes be logged.
3386 (Whenever a remote delivery process finished, the return path value from
3387 the most recently started remote delivery process was logged.)
3389 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3390 lines when AUTH and/or TLS are in use. This is the "received protocol"
3391 field. Exim used to use "asmtp" for authenticated SMTP, without any
3392 indication (in the protocol name) for TLS use. Now it follows the RFC and
3393 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3394 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3395 names appear in log lines as well as in Received: header lines.
3397 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3398 extensions, and comparison tests, and to fix some bugs.
3400 14. Changes to the "personal" filter test:
3402 (1) The test was buggy in that it was just doing the equivalent of
3403 "contains" tests on header lines. For example, if a user's address was
3404 anne@some.where, the "personal" test would incorrectly be true for
3406 To: susanne@some.where
3408 This test is now done by extracting each address from the header in turn,
3409 and checking the entire address. Other tests that are part of "personal"
3410 are now done using regular expressions (for example, to check local parts
3411 of addresses in From: header lines).
3413 (2) The list of non-personal local parts in From: addresses has been
3414 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3415 taken from the Sieve specification recommendations.
3417 (3) If the message contains any header line starting with "List-" it is
3418 treated as non-personal.
3420 (4) The test for "circular" in the Subject: header line has been removed
3421 because it now seems ill-conceived.
3423 15. Minor typos in src/EDITME comments corrected.
3425 16. Installed latest exipick from John Jetmore.
3427 17. If headers_add on a router specified a text string that was too long for
3428 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3429 of string_sprintf() is now avoided.
3431 18. $message_body_size was not set (it was always zero) when running the DATA
3432 ACL and the local_scan() function.
3434 19. For the "mail" command in an Exim filter, no default was being set for
3435 the once_repeat time, causing a random time value to be used if "once" was
3436 specified. (If the value happened to be <= 0, no repeat happened.) The
3437 default is now 0s, meaning "never repeat". The "vacation" command was OK
3438 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3439 (I found it when inspecting the code).
3441 20. There is now an overall timeout for performing a callout verification. It
3442 defaults to 4 times the callout timeout, which applies to individual SMTP
3443 commands during the callout. The overall timeout applies when there is more
3444 than one host that can be tried. The timeout is checked before trying the
3445 next host. This prevents very long delays if there are a large number of
3446 hosts and all are timing out (e.g. when the network connections are timing
3447 out). The value of the overall timeout can be changed by specifying an
3448 additional sub-option for "callout", called "maxwait". For example:
3450 verify = sender/callout=5s,maxwait=20s
3452 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3453 to the end before writing, but this should make it even safer).
3455 22. Exim was forgetting that it had advertised PIPELINING for the second and
3456 subsequent messages on an SMTP connection. It was also not resetting its
3457 memory on STARTTLS and an internal HELO.
3459 23. When Exim logs an SMTP synchronization error within a session, it now
3460 records whether PIPELINING has been advertised or not.
3462 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3463 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3464 rather than long int.
3466 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3468 26. Added the never_mail option to autoreply.
3474 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3475 crash if the getsockname() call failed; this can happen if a connection is
3476 closed very soon after it is established. The problem was simply in the
3477 order in which certain operations were done, causing Exim to try to write
3478 to the SMTP stream before it had set up the file descriptor. The bug has
3479 been fixed by making things happen in the correct order.
3485 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3486 before the connection was closed, thus losing the rejection response.
3488 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3489 some early Solaris releases, but causes trouble in current releases where
3490 socklen_t is defined.
3492 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3495 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3498 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3499 that releasing the top of it at the end releases what was used for sub-
3500 expansions (unless the block got too big). However, discard this block if
3501 the first thing is a variable or header, so that we can use its block when
3502 it is dynamic (useful for very large $message_headers, for example).
3504 6. Lookups now cache *every* query, not just the most recent. A new, separate
3505 store pool is used for this. It can be recovered when all lookup caches are
3506 flushed. Lookups now release memory at the end of their result strings.
3507 This has involved some general refactoring of the lookup sources.
3509 7. Some code has been added to the store_xxx() functions to reduce the amount
3510 of flapping under certain conditions.
3512 8. log_incoming_interface used to affect only the <= reception log lines. Now
3513 it causes the local interface and port to be added to several more SMTP log
3514 lines, for example "SMTP connection from", and rejection lines.
3516 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3518 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3520 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3521 could be overwritten at the end of the current message (or the start of a
3522 new message if it was set in a HELO ACL). The value is now preserved for
3523 the duration of the SMTP connection.
3525 12. If a transport had a headers_rewrite setting, and a matching header line
3526 contained an unqualified address, that address was qualified, even if it
3527 did not match any rewriting rules. The underlying bug was that the values
3528 of the flags that permit the existence of unqualified sender and recipient
3529 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3530 non-local messages, and by -bnq for local messages) were not being
3531 preserved with the message after it was received.
3533 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3534 "next input=" as part of the text comprising the host identity instead of
3535 the correct text. The code was using the same buffer for two different
3536 strings. However, depending on which order the printing function evaluated
3537 its arguments, the bug did not always show up. Under Linux, for example, my
3538 test suite worked just fine.
3540 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3541 doesn't work with some older versions of Perl. It has been changed to "my",
3542 which in any case is probably the better facility to use.
3544 15. A really picky compiler found some instances of statements for creating
3545 error messages that either had too many or two few arguments for the format
3548 16. The size of the buffer for calls to the DNS resolver has been increased
3549 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3550 for addresses that have a lot of PTR records. This alleviates a problem; it
3551 does not fully solve it.
3553 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3554 buffer now truncates the list and logs the incident, which is the same
3555 action as happens when Exim is looking up a host name and its aliases.
3556 Previously in this situation something unpredictable would happen;
3557 sometimes it was "internal error: store_reset failed".
3559 18. If a server dropped the connection unexpectedly when an Exim client was
3560 using GnuTLS and trying to read a response, the client delivery process
3561 crashed while trying to generate an error log message.
3563 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3564 string, for example:
3566 warn message = H1: something\nH2: something
3568 the text was added as a single header line from Exim's point of view
3569 though it ended up OK in the delivered message. However, searching for the
3570 second and subsequent header lines using $h_h2: did not work. This has been
3571 fixed. Similarly, if a system filter added multiple headers in this way,
3572 the routers could not see them.
3574 20. Expanded the error message when iplsearch is called with an invalid key to
3575 suggest using net-iplsearch in a host list.
3577 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3578 ACLs are no longer actually imposed (and a message to that effect is
3581 22. If a "gecos" field in a passwd entry contained escaped characters, in
3582 particular, if it contained a \" sequence, Exim got it wrong when building
3583 a From: or a Sender: header from that name. A second bug also caused
3584 incorrect handling when an unquoted " was present following a character
3585 that needed quoting.
3587 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3588 was not being matched caselessly.
3590 24. Arranged for all hyphens in the exim.8 source to be escaped with
3593 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3594 properly. Recipient callout cache records were still being keyed to include
3595 the sender, even when use_sender was set false. This led to far more
3596 callouts that were necessary. The sender is no longer included in the key
3597 when use_sender is false.
3599 26. Added "control = submission" modifier to ACLs.
3601 27. Added the ${base62d: operator to decode base 62 numbers.
3603 28. dnsdb lookups can now access SRV records.
3605 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3606 the configuration file.
3608 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3609 (-v) mode. This makes the output for a verbose queue run more intelligible.
3611 31. Added a use_postmaster feature to recipient callouts.
3613 32. Added the $body_zerocount variable, containing the number of binary zero
3614 bytes in the message body.
3616 33. The time of last modification of the "new" subdirectory is now used as the
3617 "mailbox time last read" when there is a quota error for a maildir
3620 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3622 35. Added +ignore_unknown as a special item in host lists.
3624 36. Code for decoding IPv6 addresses in host lists is now included, even if
3625 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3626 address was recognized as an IP address, but was then not correctly decoded
3627 into binary, causing unexpected and incorrect effects when compared with
3634 1. Very minor rewording of debugging text in manualroute to say "list of
3635 hosts" instead of "hostlist".
3637 2. If verify=header_syntax was set, and a header line with an unqualified
3638 address (no domain) and a large number of spaces between the end of the
3639 name and the colon was received, the reception process suffered a buffer
3640 overflow, and (when I tested it) crashed. This was caused by some obsolete
3641 code that should have been removed. The fix is to remove it!
3643 3. When running in the test harness, delay a bit after writing a bounce
3644 message to get a bit more predictability in the log output.
3646 4. Added a call to search_tidyup() just before forking a reception process. In
3647 theory, someone could use a lookup in the expansion of smtp_accept_max_
3648 per_host which, without the tidyup, could leave open a database connection.
3650 5. Added the variables $recipient_data and $sender_data which get set from a
3651 lookup success in an ACL "recipients" or "senders" condition, or a router
3652 "senders" option, similar to $domain_data and $local_part_data.
3654 6. Moved the writing of debug_print from before to after the "senders" test
3657 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3658 problems for message scanning, either using a data ACL, or using
3659 local_scan() because the Received: header was not generated till after they
3660 were called (in order to set the time as the time of reception completion).
3661 I have revised the way this works. The header is now generated after the
3662 body is received, but before the ACL or local_scan() are called. After they
3663 are run, the timestamp in the header is updated.
3669 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3670 before starting a queue runner without re-exec. This happened only when
3671 deliver_drop_privilege was set or when the Exim user was set to root. The
3672 effect of the bug was that timeouts during subsequent deliveries caused
3673 crashes instead of being properly handled. The handler is now left at its
3674 default (and expected) setting.
3676 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3677 message, again when deliver_drop_privilege is set or Exim is run as root.
3678 The bug described in (1) was not present in this case, but the tidying up
3679 of the other signals was missing. I have made the two cases consistent.
3681 3. The ignore_target_hosts setting on a manualroute router was being ignored
3682 for hosts that were looked up using the /MX notation.
3684 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3687 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3688 operated on the sender address. After changing the $sender_address to <>
3689 for the sender address verify, Exim was re-instated it as the original
3690 (before rewriting) address, but remembering that it had rewritten it, so it
3691 wasn't rewriting it again. This bug also had the effect of breaking the
3692 sender address verification caching when the sender address was rewritten.
3694 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3695 This has been changed so that if the ip literal address matches
3696 ignore_target_hosts, the router declines.
3698 7. Added expansion conditions match_domain, match_address, and match_local_
3699 part (NOT match_host).
3701 8. The placeholder for the Received: header didn't have a length field set.
3703 9. Added code to Exim itself and to exim_lock to test for a specific race
3704 condition that could lead to file corruption when using MBX delivery. The
3705 issue is with the lockfile that is created in /tmp. If this file is removed
3706 after a process has opened it but before that process has acquired a lock,
3707 there is the potential for a second process to recreate the file and also
3708 acquire a lock. This could lead to two Exim processes writing to the file
3709 at the same time. The added code performs the same test as UW imapd; it
3710 checks after acquiring the lock that its file descriptor still refers to
3711 the same named file.
3713 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3714 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3717 11. Added the smtp_active_hostname option. If used, this will typically be made
3718 to depend on the incoming interface address. Because $interface_address is
3719 not set up until the daemon has forked a reception process, error responses
3720 that can happen earlier (such as "too many connections") no longer contain
3723 12. If an expansion in a condition on a "warn" statement fails because a lookup
3724 defers, the "warn" statement is abandoned, and the next ACL statement is
3725 processed. Previously this caused the whole ACL to be aborted.
3727 13. Added the iplsearch lookup type.
3729 14. Added ident_timeout as a log selector.
3731 15. Added tls_certificate_verified as a log selector.
3733 16. Added a global option tls_require_ciphers (compare the smtp transport
3734 option of the same name). This controls incoming TLS connections.
3736 17. I finally figured out how to make tls_require_ciphers do a similar thing
3737 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3738 before starting the TLS session.
3740 18. Tabs are now shown as \t in -bP output.
3742 19. If the log selector return_path_on_delivery was set, Exim crashed when
3743 bouncing a message because it had too many Received: header lines.
3745 20. If two routers both had headers_remove settings, and the first one included
3746 a superfluous trailing colon, the final name in the first list and the
3747 first name in the second list were incorrectly joined into one item (with a
3748 colon in the middle).
3754 1. Added -C and -D options to the exinext utility, mainly to make it easier
3755 to include in the automated testing, but these could be helpful when
3756 multiple configurations are in use.
3758 2. The exinext utility was not formatting the output nicely when there was
3759 an alternate port involved in the retry record key, nor when there was a
3760 message id as well (for retries that were specific to a specific message
3761 and a specific host). It was also confused by IPv6 addresses, because of
3762 the additional colons they contain. I have fixed the IPv4 problem, and
3763 patched it up to do a reasonable job for IPv6.
3765 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3766 delivery, the log line now contains "pipelined" if PIPELINING was used.
3768 4. An SMTP transport process used to panic and die if the bind() call to set
3769 an explicit outgoing interface failed. This has been changed; it is now
3770 treated in the same way as a connect() failure.
3772 5. A reference to $sender_host_name in the part of a conditional expansion
3773 that was being skipped was still causing a DNS lookup. This no longer
3776 6. The def: expansion condition was not recognizing references to header lines
3777 that used bh_ and bheader_.
3779 7. Added the _cache feature to named lists.
3781 8. The code for checking quota_filecount in the appendfile transport was
3782 allowing one more file than it should have been.
3784 9. For compatibility with Sendmail, the command line option
3792 and sets the incoming protocol and host name (for trusted callers). The
3793 host name and its colon can be omitted when only the protocol is to be set.
3794 Note the Exim already has two private options, -pd and -ps, that refer to
3795 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3796 "s", but I don't think that's a major issue.
3798 10. A number of refactoring changes to the code, none of which should affect
3801 (a) The number of logging options was getting close to filling up the
3802 32-bit word that was used as a bit map. I have split them into two classes:
3803 those that are passed in the argument to log_write(), and those that are
3804 only ever tested independently outside of that function. These are now in
3805 separate 32-bit words, so there is plenty of room for expansion again.
3806 There is no change in the user interface or the logging behaviour.
3808 (b) When building, for example, log lines, the code previously used a
3809 macro that called string_cat() twice, in order to add two strings. This is
3810 not really sufficiently general. Furthermore, there was one instance where
3811 it was actually wrong because one of the argument was used twice, and in
3812 one call a function was used. (As it happened, calling the function twice
3813 did not affect the overall behaviour.) The macro has been replaced by a
3814 function that can join an arbitrary number of extra strings onto a growing
3817 (c) The code for expansion conditions now uses a table and a binary chop
3818 instead of a serial search (which was left over from when there were very
3819 few conditions). Also, it now recognizes conditions like "pam" even when
3820 the relevant support is not compiled in: a suitably worded error message is
3821 given if an attempt is made to use such a condition.
3823 11. Added ${time_interval:xxxxx}.
3825 12. A bug was causing one of the ddress fields not to be passed back correctly
3826 from remote delivery subprocesses. The field in question was not being
3827 subsequently used, so this caused to problems in practice.
3829 13. Added new log selectors queue_time and deliver_time.
3831 14. Might have fixed a bug in maildirsizefile handling that threw up
3832 "unexpected character" debug warnings, and recalculated the data
3833 unnecessarily. In any case, I expanded the warning message to give more
3836 15. Added the message "Restricted characters in address" to the statements in
3837 the default ACL that block characters like @ and % in local parts.
3839 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3840 Three changes have been made:
3842 (a) There was a serious bug; a negative response to MAIL caused the whole
3843 recipient domain to be cached as invalid, thereby blocking all messages
3844 to all local parts at the same domain, from all senders. This bug has
3845 been fixed. The domain is no longer cached after a negative response to
3846 MAIL if the sender used is not empty.
3848 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3851 (c) A new callout option, "use_sender" has been added for people who want
3852 the modified behaviour.
3858 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3861 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3862 indeed breaks things for older releases.
3864 3. Added additional logging to the case where there is a problem reading data
3865 from a filter that is running in a subprocess using a pipe, in order to
3866 try to track down a specific problem.
3868 4. Testing facility fudge: when running in the test harness and attempting
3869 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3870 getting "No route to host". Convert this to a timeout.
3872 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3875 6. Some OS don't have socklen_t but use size_t instead. This affects the
3876 fifth argument of getsockopt() amongst other things. This is now
3877 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3878 can be set for individual OS. I have set it for SunOS5, OSF1, and
3879 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3880 some earlier ones do not.
3882 7. Change 4.30/15 was not doing the test caselessly.
3884 8. The standard form for an IPv6 address literal was being rejected by address
3885 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3886 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3887 this, as well as the form without the "IPv6" on the front (but only when
3888 address literals are enabled, of course).
3890 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3892 10. Exim crashed if a message with an empty sender address specified by -f
3893 encountered a router with an errors_to setting. This could be provoked only
3894 by a command such as
3898 where an empty string was supplied; "<>" did not hit this bug.
3900 11. Installed PCRE release 4.5.
3902 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3903 remained set. It is now erased.
3905 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3906 times from message ids (which are base 36 rather than the normal 62).
3908 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3909 were being counted as actual protocol errors, and logged if the log
3910 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3911 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3912 and DATA following a set of rejected RCPTs do not count as protocol errors.
3913 In other words, Exim assumes they were pipelined, though this may not
3914 actually be the case. Of course, in all cases the client gets an
3915 appropriate error code.
3917 15. If a lookup fails in an ACL condition, a message about the failure may
3918 be available; it is used if testing the ACL cannot continue, because most
3919 such messages specify what the cause of the deferral is. However, some
3920 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3921 that caused an old message to be retained and used if a later statement
3922 caused a defer, replacing the real cause of the deferral.
3924 16. If an IP address had so many PTR records that the DNS lookup buffer
3925 was not large enough to hold them, Exim could crash while trying to process
3926 the truncated data. It now detects and logs this case.
3928 17. Further to 4.21/58, another change has been made: if (and only if) the
3929 first line of a message (the first header line) ends with CRLF, a bare LF
3930 in a subsequent header line has a space inserted after it, so as not to
3931 terminate the header.
3933 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3934 unnecessarily, used atoi() instead of strtol(), and didn't check the
3935 termination when getting file sizes from file names by regex.
3937 19. Completely re-implemented the support for maildirsize files, in the light
3938 of a number of problems with the previous contributed implementation
3939 (4.30/29). In particular:
3941 . If the quota is zero, the maildirsize file is maintained, but no quota is
3944 . If the maildir directory does not exist, it is created before any attempt
3945 to write a maildirsize file.
3947 . The quota value in the file is just a cache; if the quota is changed in
3948 the transport, the new value overrides.
3950 . A regular expression is available for excluding directories from the
3953 20. The autoreply transport checks the characters in options that define the
3954 message's headers; it allows continued headers, but it was checking with
3955 isspace() after an embedded newline instead of explicitly looking for a
3958 21. If all the "regular" hosts to which an address was routed had passed their
3959 expiry times, and had not reached their retry times, the address was
3960 bounced, even if fallback hosts were defined. Now Exim should go on to try
3963 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3964 equivalent code in the SMTP transport. Some hosts send humungous responses
3965 to HELO/EHLO, more than 1024 it seems.
3967 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3968 gives compiler warnings in some environments. I've now done it "properly",
3971 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3972 (because of problems with the built-in one) was declared to return uschar *
3973 instead of char *, causing compiler failure.
3975 25. Fixed a file descriptor leak when processing alias/forward files.
3977 26. Fixed a minor format string issue in dbfn.c.
3979 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3981 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3982 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3985 29. When a sender address is verified, it is cached, to save repeating the test
3986 when there is more than one recipient in a message. However, when the
3987 verification involves a callout, it is possible for different callout
3988 options to be set for different recipients. It is too complicated to keep
3989 track of this in the cache, so now Exim always runs a verification when a
3990 callout is required, relying on the callout cache for the optimization.
3991 The overhead is duplication of the address routing, but this should not be
3994 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3995 to be verified with callout=postmaster, and the main callout worked but the
3996 postmaster check failed, the verification correctly failed. However, if a
3997 subsequent RCPT command asked for sender verification *without* the
3998 postmaster check, incorrect caching caused this verification also to fail,
4001 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4002 it was not caching the DNS options (qualify_single, search_parents) that
4003 were used when the lookup failed. A subsequent lookup with different
4004 options therefore always gave the same answer, though there were cases
4005 where it should not have. (Example: a "domains = !$mx_any" option on a
4006 dnslookup router: the "domains" option is always processed without any
4007 widening, but the router might have qualify_single set.) Now Exim uses the
4008 cached value only when the same options are set.
4010 32. Added John Jetmore's "exipick" utility to the distribution.
4012 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4013 than a timeout (e.g. a certificate is required, and is not provided), an
4014 Exim server now closes the connection immediately. Previously it waited for
4015 the client to close - but if the client is SSL, it seems that they each
4016 wait for each other, leading to a delay before one of them times out.
4018 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4019 maintained 0.8.x compatibility because I don't think many are using it, and
4020 it is clearly obsolete.
4022 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4025 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4026 client certificate was expired. A simple patch fixes this, though I don't
4027 understand the full logic of why the verify callback is called multiple
4030 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4031 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4032 which causes problems with some clients (such as the Certicom SSL Plus
4033 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4034 disables the coutermeasure allowing Eudora to connect."
4036 38. Exim was not checking that a write() to a log file succeeded. This could
4037 lead to Bad Things if a log got too big, in particular if it hit a file
4038 size limit. Exim now panics and dies if it cannot write to a log file, just
4039 as it does if it cannot open a log file.
4041 39. Modified OS/Makefile-Linux so that it now contains
4043 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4045 The two -D definitions ensure that Exim is compiled with large file
4046 support, which makes it possible to handle log files that are bigger than
4049 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4050 instance) a domain was checked against a named list that involved a lookup,
4051 causing $domain_data to be set, then another domain was checked against the
4052 same list, then the first domain was re-checked, the value of $domain_data
4053 after the final check could be wrong. In particular, if the second check
4054 failed, it could be set empty. This bug probably also applied to
4057 41. The strip_trailing_dot option was not being applied to the address given
4058 with the -f command-line option.
4060 42. The code for reading a message's header from the spool was incrementing
4061 $received_count, but never initializing it. This meant that the value was
4062 incorrect (doubled) while delivering a message in the same process in which
4063 it was received. In the most common configuration of Exim, this never
4064 happens - a fresh exec is done - but it can happen when
4065 deliver_drop_privilege is set.
4067 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4068 it now includes up to 150 characters of the unexpected data in the log
4071 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4072 and building data strings. The size of both of these buffers was 10 000
4073 bytes - far larger than anybody would *ever* want, thought I. Needless to
4074 say, somebody hit the limit. I have increased the maximum line length to
4075 20 000 and the maximum data length of concatenated lines to 100 000. I have
4076 also fixed two bugs, because there was no checking on these buffers. Tsk,
4077 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4078 buffer is too small.
4080 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4081 lsearch lookups. Now it does.
4083 46. When parsing a route_list item in a manualroute router, a fixed-length
4084 buffer was used for the list of hosts. I made this 1024 bytes long,
4085 thinking that nobody would ever have a list of hosts that long. Wrong.
4086 Somebody had a whole pile of complicated expansion conditions, and the
4087 string was silently truncated, leading to an expansion error. It turns out
4088 that it is easier to change to an unlimited length (owing to other changes
4089 that have happened since this code was originally written) than to build
4090 structure for giving a limitation error. The length of the item that
4091 expands into the list of hosts is now unlimited.
4093 47. The lsearch lookup could not handle data where the length of text line was
4094 more than 4095 characters. Such lines were truncated, leading to shortened
4095 data being returned. It should now handle lines of any length.
4097 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4098 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4101 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4102 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4103 no longer happens in comment lines. A list of replacements is now placed
4104 at the head of all of the source files, except those whose only change is
4105 to replace PERL_COMMAND in the very first #! line.
4107 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4108 messages on the queue, with a bottom-up merge sort, using code contributed
4109 by Michael Haardt. This should make operations like -bp somewhat faster on
4110 large queues. It won't affect queue runners, except when queue_run_in_order
4113 51. Installed eximstats 1.31 in the distribution.
4115 52. Added support for SRV lookups to the dnslookup router.
4117 53. If an ACL referred to $message_body or $message_body_end, the value was not
4118 reset for any messages that followed in the same SMTP session.
4120 54. The store-handling optimization for building very long strings was not
4121 differentiating between the different store pools. I don't think this
4122 actually made any difference in practice, but I've tidied it.
4124 55. While running the routers to verify a sender address, $sender_address
4125 was still set to the sender address. This is wrong, because when routing to
4126 send a bounce to the sender, it would be empty. Therefore, I have changed
4127 it so that, while verifying a sender address, $sender_address is set to <>.
4128 (There is no change to what happens when verifying a recipient address.)
4130 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4131 target A or AAAA records (if not already returned) without resetting the
4132 qualify_single or search_parents options of the DNS resolver. These are
4133 inappropriate in this case because the targets of MX and SRV records must
4134 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4135 target that, when qualified, matched something in the local domain. These
4136 two options are now turned off when doing these lookups.
4138 57. It seems that at least some releases of Reiserfs (which does not have the
4139 concept of a fixed number of inodes) returns zero and not -1 for the
4140 number of available inodes. This interacted badly with check_spool_inodes,
4141 which assumed that -1 was the "no such thing" setting. What I have done is
4142 to check that the total number of inodes is greater than zero before doing
4143 the test of how many are available.
4145 58. When a "warn" ACL statement has a log_message modifier, the message is
4146 remembered, and not repeated. This is to avoid a lot of repetition when a
4147 message has many recipients that cause the same warning to be written.
4148 Howewer, Exim was preserving the list of already written lines for an
4149 entire SMTP session, which doesn't seem right. The memory is now reset if a
4150 new message is started.
4152 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4153 debugging output unless log_rewrite was also set.
4155 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4156 of (int)(handle) when we know that handle contains (void *)(-1).
4158 61. The Exim daemon panic-logs an error return when it closes the incoming
4159 connection. However "connection reset by peer" seems to be common, and
4160 isn't really an error worthy of noting specially, so that particular error
4163 62. When Exim is trying to find all the local interfaces, it used to panic and
4164 die if the ioctl to get the interface flags failed. However, it seems that
4165 on at least one OS (Solaris 9) it is possible to have an interface that is
4166 included in the list of interfaces, but for which you get a failure error
4167 for this call. This happens when the interface is not "plumbed" into a
4168 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4169 failure of the "get flags" call assumes that the interface is down.
4171 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4172 makes life easier for people who are doing arithmetic on fields extracted
4173 from dates, where you often get leading zeros that should not be
4174 interpreted as octal.
4176 64. Added qualify_domain to the redirect router, to override the global
4179 65. If a pathologically long header line contained very many addresses (the
4180 report of this problem mentioned 10 000) and each of them was rewritten,
4181 Exim could use up a very large amount of memory. (It kept on making new
4182 copies of the header line as it rewrote, and never released the old ones.)
4183 At the expense of a bit more processing, the header rewriting function has
4184 been changed so that it no longer eats memory in this way.
4186 66. The generation of the Received: header has been moved from the time that a
4187 message starts to be received, to the time that it finishes. The timestamp
4188 in the Received: header should now be very close to that of the <= log
4189 line. There are two side-effects of this change:
4191 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4192 logged header lines no longer include the local Received: line, because
4193 it has not yet been created. The same applies to a copy of the message
4194 that is returned to a non-SMTP sender when a message is rejected.
4196 (b) When a filter file is tested using -bf, no additional Received: header
4197 is added to the test message. After some thought, I decided that this
4200 This change does not affect the value of $received_for. It is still set
4201 after address rewriting, but before local_scan() is called.
4203 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4205 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4206 gave an unhelpful panic error message, and a defer error. I have managed to
4207 change this behaviour so that it now rejects any supplied certificate,
4208 which seems right, as the list of acceptable certificates is empty.
4210 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4211 gave an unhelpful defer error. I have not managed to make this reject any
4212 supplied certificates, but the error message it gives is "no certificate
4213 supplied", which is not helpful.
4215 70. exigrep's output now also includes lines that are not associated with any
4216 message, but which match the given pattern. Implemented by a patch from
4217 Martin Sluka, which also tidied up the Perl a bit.
4219 71. Recipient callout verification, like sender verification, was using <> in
4220 the MAIL FROM command. This isn't really the right thing, since the actual
4221 sender may affect whether the remote host accepts the recipient or not. I
4222 have changed it to use the actual sender in the callout; this means that
4223 the cache record is now keyed on a recipient/sender pair, not just the
4224 recipient address. There doesn't seem to be a real danger of callout loops,
4225 since a callout by the remote host to check the sender would use <>.
4226 [SEE ABOVE: changed after hitting problems.]
4228 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4229 temporary errors. However, in the case of such a code being given after
4230 the end of a data transmission (i.e. after ".") Exim was failing to write
4231 a retry record for the message. (Yes, there was some broken host that was
4232 actually sending 8xx at this point.)
4234 73. An unknown lookup type in a host list could cause Exim to panic-die when
4235 the list was checked. (An example that provoked this was putting <; in the
4236 middle of a list instead of at the start.) If this happened during a DATA
4237 ACL check, a -D file could be left lying around. This kind of configuration
4238 error no longer causes Exim to die; instead it causes a defer errror. The
4239 incident is still logged to the main and panic logs.
4241 74. Buglet left over from Exim 3 conversion. The message "too many messages
4242 in one connection" was written to the rejectlog but not the mainlog, except
4243 when address rewriting (yes!) was being logged.
4245 75. Added write_rejectlog option.
4247 76. When a system filter was run not as root (that is, when system_filter_user
4248 was set), the values of the $n variables were not being returned to the
4249 main process; thus, they were not subsequently available in the $sn
4252 77. Added +return_path_on_delivery log selector.
4254 78. A connection timeout was being treated differently from recipients deferred
4255 when testing hosts_max_try with a message that was older than the host's
4256 retry timeout. (The host should not be counted, thus allowing all hosts to
4257 be tried at least once before bouncing.) This may have been the cause of an
4258 occasionally reported bug whereby a message would remain on the queue
4259 longer than the retry timeout, but would be bounced if a delivery was
4260 forced. I say "may" because I never totally pinned down the problem;
4261 setting up timeout/retry tests is difficult. See also the next item.
4263 79. The ultimate address timeout was not being applied to errors that involved
4264 a combination of host plus message (for example, a timeout on a MAIL
4265 command). When an address resolved to a number of possible hosts, and they
4266 were not all tried for each delivery (e.g. because of hosts_max_try), a
4267 message could remain on the queue longer than the retry timeout.
4269 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4272 81. Fixed an obscure SMTP outgoing bug which required at least the following
4273 conditions: (a) there was another message waiting for the same server;
4274 (b) the server returned 5xx to all RCPT commands in the first message so
4275 that the message was not completed; (c) the server dropped the connection
4276 or gave a negative response to the RSET that Exim sends to abort the
4277 transaction. The observed case was a dropped connection after DATA that had
4278 been sent in pipelining mode. That is, the server had advertised PIPELINING
4279 but was not implementing it correctly. The effect of the bug was incorrect
4280 behaviour, such as trying another host, and this could lead to a crash.
4286 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4287 and daemon.c were passed as pointers to ints; they should have been
4288 pointers to socklen_t variables (which are typically unsigned ints).
4290 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4293 3. Fixed a really odd bug that affected only the testing scheme; patching a
4294 certain fixed string in the binary changed the value of another string that
4295 happened to be identical to the end of the original first string.
4297 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4298 name", it returns that address as the IP address. On some operating
4299 systems (e.g. Solaris), it also passes back the IP address string as the
4300 "host name". However, on others (e.g. Linux), it passes back an empty
4301 string. Exim wasn't checking for this, and was changing the host name to an
4302 empty string, assuming it had been canonicized.
4304 5. Although rare, it is permitted to have more than one PTR record for a given
4305 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4306 all the names associated with an address, because they do in Solaris.
4307 However, it seems that they do not in Linux for data that comes from the
4308 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4309 I found this out when I moved to a new Linux workstation and tried to run
4310 the Exim test suite.
4312 To get round this problem I have changed the code so that it now does its
4313 own call to the DNS to look up PTR records when searching for a host name.
4314 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4315 addresses that are only in /etc/hosts are still found.
4317 This behaviour is, however, controlled by an option called host_lookup_
4318 order, which defaults to "bydns:byaddr". If people want to use the other
4319 order, or indeed, just use one or the other means of lookup, they can
4320 specify it in this variable.
4322 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4323 some operating systems, this comes back from gethostbyaddr() as an empty
4324 string, and this is what Exim used to test for. However, it seems that in
4325 other systems, "." is yielded. Exim now tests for this case too.
4327 7. The values of check_spool_space and check_log_space are now held internally
4328 as a number of kilobytes instead of an absolute number of bytes. If a
4329 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4330 kilobyte. This means that much larger values can be stored.
4332 8. Exim monitor: an attempt to get the action menu when not actually pointing
4333 at a message produces an empty menu entitled "No message selected". This
4334 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4335 no entries in it ("Shell widget menu has zero width and/or height"). So I
4336 have added a single, blank menu entry in this case.
4338 9. Added ${quote_local_part.
4340 10. MIME decoding is now applied to the contents of Subject: header lines when
4343 11. Now that a reference to $sender_host_address automatically causes a reverse
4344 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4345 host lookup before query-style lookups in lists that might use this
4346 variable. This has therefore been abolished, and the "net-" prefix is no
4347 longer necessary for query-style lookups.
4349 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4350 have been a typo for LFLAGS, so it has been changed.
4352 13. The install script calls Exim with "-C /dev/null" in order to find the
4353 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4354 to be output. Howeve, since Exim outputs its version number before the
4355 error, it didn't break the script. It just looked ugly. I fixed this by
4356 always allowing "-C /dev/null" if the caller is root.
4358 14. Ignore overlarge ACL variable number when reading spool file - insurance
4359 against a later release with more variables having written the file.
4361 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4362 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4363 this, as well as the form without the "IPv6" on the front.
4365 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4366 OS/Makefile-Darwin file.
4368 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4369 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4371 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4372 variable. However, some OS use ints for inodes. I've added cast to long int
4373 to get rid of the compiler warning.
4375 19. I had forgotten to lock out "/../" in configuration file names when
4376 ALT_CONFIG_PREFIX was set.
4378 20. Routers used for verification do not need to specify transports. However,
4379 if such a router generated a host list, and callout was configured, Exim
4380 crashed, because it could not find a port number from the (non-existent)
4381 transport. It now assumes port 25 in this circumstance.
4383 21. Added the -t option to exigrep.
4385 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4386 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4387 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4388 them is set, LOOKUP_LSEARCH is forced.
4390 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4392 24. Added sender and host information to the "rejected by local_scan()" log
4393 line; previously there was no indication of these.
4395 25. Added .include_if_exists.
4397 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4398 Linux. It turns out that not all file systems support this. Apparently some
4399 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4400 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4401 not supported on the file descriptor, is now ignored when Exim is trying to
4402 sync a directory. This applies only to Linux.
4404 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4406 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4407 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4410 29. Added support for maildirsize files from supplied patch (modified a bit).
4412 30. The use of :fail: followed by an empty string could lead Exim to respond to
4413 sender verification failures with (e.g.):
4415 550 Verification failed for <xxx>
4416 550 Sender verify failed
4418 where the first response line was missing the '-' that indicates it is not
4419 the final line of the response.
4421 31. The loop for finding the name of the user that called Exim had a hardwired
4422 limit of 10; it now uses the value of finduser_retries, which is used for
4423 all other user lookups.
4425 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4428 33. Exim was neglecting to zero errno before one call of strtol() when
4429 expanding a string and expecting an integer value. On some systems this
4430 resulted in spurious "integer overflow" errors. Also, it was casting the
4431 result into an int without checking.
4433 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4434 did not work. The code looks as if it has *never* worked, though it appears
4435 to have been documented since at least releast 1.62. I have made it work.
4437 35. The "timeout_DNS" error in retry rules, also documented since at least
4438 1.62, also never worked. As it isn't clear exactly what this means, and
4439 clearly it isn't a major issue, I have abolished the feature by treating it
4440 as "timeout", and writing a warning to the main and panic logs.
4442 36. The display of retry rules for -brt wasn't always showing the error code
4445 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4446 timeout_connect_A, timeout_connect_MX.
4448 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4449 to the empty sender.
4451 39. The daemon was not analysing the content of -oX till after it had closed
4452 stderr and disconnected from the controlling terminal. This meant that any
4453 syntax errors were only noted on the panic log, and the return code from
4454 the command was 0. By re-arranging the code a little, I've made the
4455 decoding happen first, so such errors now appear on stderr, and the return
4456 code is 1. However, the actual setting up of the sockets still happens in
4457 the disconnected process, so errors there are still only recorded on the
4460 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4461 connections (as happens on some IP stacks) was logged at start up time as
4462 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4463 it from "IPv6 and IPv4", which means that two separate sockets are being
4466 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4467 says whether AF_INET or AF_INET6 was passed as an argument.
4469 42. Exiwhat output was messed up when time zones were included in log
4472 43. Exiwhat now gives more information about the daemon's listening ports,
4473 and whether -tls-on-connect was used.
4475 44. The "port" option of the smtp transport is now expanded.
4477 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4478 silently ignored. Now an error message is written to the main and panic
4481 46. There's a new ACL modifier called "logwrite" which writes to a log file
4482 as soon as it is encountered.
4484 47. Added $local_user_uid and $local_user_gid at routing time.
4486 48. Exim crashed when trying to verify a sender address that was being
4489 49. Exim was recognizing only a space character after ".include". It now also
4490 recognizes a tab character.
4492 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4493 extracting the relevant information from the specification. The man page no
4494 longer contains scrambled data for the -d option, and I've added a section
4495 at the front about calling Exim under different names.
4497 51. Added "extra_headers" argument to the "mail" command in filter files.
4499 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4502 53. Installed eximstats 1.29.
4504 54. Added transport_filter_timeout as a generic transport option.
4506 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4507 Cc: header lines. This was required by RFC 822, but it not required by RFC
4510 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4511 incoming messages that did not have them. Now it does so only if the
4512 message originates locally, that is, if there is no associated remote host
4513 address. When Resent- header lines are present, this applies to the Resent-
4514 lines rather than the non-Resent- lines.
4516 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4517 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4519 58. Messages for configuration errors now include the name of the main
4520 configuration file - useful now that there may be more than one file in a
4521 list (.included file names were always shown).
4523 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4524 for those rare installations that do not start the daemon as root or run it
4525 setuid root. I've cut out the call to initgroups() if the daemon is not
4528 60. The Exim user and group can now be bound into the binary as text strings
4529 that are looked up at the start of Exim's processing.
4531 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4533 62. Added $mailstore_basename variable.
4535 63. Installed patch to sieve.c from Michael Haardt.
4537 64. When Exim failed to open the panic log after failing to open the main log,
4538 the original message it was trying to log was written to stderr and debug
4539 output, but if they were not available (the usual case in production), it
4540 was lost. Now it is written to syslog before the two lines that record the
4541 failures to open the logs.
4543 65. Users' Exim filters run in subprocesses under the user's uid. It is
4544 possible for a "deliver" command or an alias in a "personal" command to
4545 provoke an address rewrite. If logging of address rewriting is configured,
4546 this fails because the process is not running as root or exim. There may be
4547 a better way of dealing with this, but for the moment (because 4.30 needs
4548 to be released), I have disabled address rewrite logging when running a
4549 filter in a non-root, non-exim process.
4555 1. The buildconfig auxiliary program wasn't quoting the value set for
4556 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4557 not defined. This bug was masked in 4.22 by the effect that was fixed in
4560 2. Some messages that were rejected after a message id was allocated were
4561 shown as "incomplete" by exigrep. It no longer does this for messages that
4562 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4564 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4565 have allow_domain_literals set, the ID did not get logged in the <= line.
4566 Domain literals are now always recognized in Message-ID: header lines.
4568 4. The first argument for a ${extract expansion item is the key name or field
4569 number. Leading and trailing spaces in this item were not being ignored,
4570 causing some misleading effects.
4572 5. When deliver_drop_privilege was set, single queue runner processes started
4573 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4574 same command in the process it spins off) were not dropping privilege.
4576 6. When the daemon running as "exim" started a queue runner, it always
4577 re-executed Exim in the spun-off process. This is a waste of effort when
4578 deliver_drop_privilege is set. The new process now just calls the
4579 queue-runner function directly.
4585 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4588 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4589 ignored. Though the use of -oP was forcing the writing of a pid file, it
4590 was always written to the default place.
4592 3. If the message "no IP address found for host xxxx" is generated during
4593 incoming verification, it is now followed by identification of the incoming
4594 connection (so you can more easily find what provoked it).
4596 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4598 5. Added some features to "harden" Exim a bit more against certain attacks:
4600 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4601 be put in Local/Makefile. This is like the never_users runtime option,
4602 but it cannot be overridden. The default setting is "root".
4604 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4605 prefix string with which any file named in a -C command line option
4608 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4609 is retained for -C and -D only if the caller of Exim is root. Without
4610 it, the exim user may also use -C and -D and retain privilege.
4612 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4613 command line option is disabled.
4615 6. Macro names set by the -D option must start with an upper case letter, just
4616 like macro names defined in the configuration file.
4618 7. Added "dereference=" facility to LDAP.
4620 8. Two instances of the typo "uknown" in the source files are fixed.
4622 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4623 the Configure-Makefile script screwed up while processing it.
4625 10. Incorporated PCRE 4.4.
4627 11. The SMTP synchronization check was not operating right at the start of an
4628 SMTP session. For example, it could not catch a HELO sent before the client
4629 waited for the greeting. There is now a check for outstanding input at the
4630 point when the greeting is written. Because of the duplex, asynchronous
4631 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4632 way, but not yet received, when the check is performed.
4634 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4635 on TCP/IP sockets, because this apparently causes some broken clients to
4638 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4639 unchanged) from the Cygwin maintainer.
4641 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4642 was supported instead of testing for mbx. Effectively a typo.
4644 15. The spa authenticator server code was not checking that the input it
4645 received was valid base64.
4647 16. The debug output line for the "set" modifier in ACLs was not showing the
4648 name of the variable that was being set.
4650 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4652 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4653 lookup on its own. Something else was needed to trigger the lookup. For
4654 example, a match in host_lookup or the need for a host name in a host list.
4655 Now, if $sender_host_name is referenced and the host name has not yet been
4656 looked up, a lookup is performed. If the lookup fails, the variable remains
4657 empty, and $host_lookup_failed is set to "1".
4659 19. Added "eqi" as a case-independent comparison operator.
4661 20. The saslauthd authentication condition could segfault if neither service
4662 nor realm was specified.
4664 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4665 error message that was logged was misleading, and incoming SMTP
4666 connections were dropped. The message is now more accurate, and temporary
4667 errors are given to SMTP connections.
4669 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4670 (except RSET) with a 421 error, until QUIT is received. However, it was
4671 failing to send a response to QUIT.
4673 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4674 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4675 ACL is now run after the helo_try_verify_hosts code.
4677 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4678 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4679 case-independent, so other case variants are also recognized). Apparently
4680 some systems use these upper case variants.
4682 25. If more than two messages were waiting for the same host, and a transport
4683 filter was specified for the transport, Exim sent two messages over the
4684 same TCP/IP connection, and then failed with "socket operation on non-
4685 socket" when it tried to send the third.
4687 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4689 27. The extern definition of crypt16() in expand.c was not being excluded when
4690 the OS had its own crypt16() function.
4692 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4693 as a preferred synonym for return_size_limit, both as an option and as an
4696 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4698 30. Changed the default configuration ACL to relax the local part checking rule
4699 for addresses that are not in any local domains. For these addresses,
4700 slashes and pipe symbols are allowed within local parts, but the sequence
4701 /../ is explicitly forbidden.
4703 31. SPA server authentication was not clearing the challenge buffer before
4706 32. log_message in a "warn" ACL statement was writing to the reject log as
4707 well as to the main log, which contradicts the documentation and doesn't
4708 seem right (because no rejection is happening). So I have stopped it.
4710 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4711 However, I am unable to do any testing of this.
4713 34. Fixed an infelicity in the appendfile transport. When checking directories
4714 for a mailbox, to see if any needed to be created, it was accidentally
4715 using path names with one or more superfluous leading slashes; tracing
4716 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4718 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4719 contents are added to the log line that is written for every discarded
4720 recipient. (Previously a log_message setting was ignored.)
4722 36. The ${quote: operator now quotes the string if it is empty.
4724 37. The install script runs exim in order to find its version number. If for
4725 some reason other than non-existence or emptiness, which it checks, it
4726 could not run './exim', it was installing it with an empty version number,
4727 i.e. as "exim-". This error state is now caught, and the installation is
4730 38. An argument was missing from the function that creates an error message
4731 when Exim fails to connect to the socket for saslauthd authentication.
4732 This could cause Exim to crash, or give a corrupted message.
4734 39. Added isip, isip4, and isip6 to ${if conditions.
4736 40. The ACL variables $acl_xx are now saved with the message, and can be
4737 accessed later in routers, transports, and filters.
4739 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4740 strings in the file are not string-expanded.
4742 42. If a MAIL command specified a SIZE value that was too large to fit into an
4743 int variable, the check against message_size_limit failed. Such values are
4744 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4745 day this will have to be increased, but I don't think I want to be around
4746 when emails are that large.
4753 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4754 iconv() is not standard in FreeBSD.
4756 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4757 IPv6 enabled. The observed symptom was a segmentation fault on return from
4758 the function os_common_find_running_interfaces() in src/os.c.
4760 3. In the check_special_case() function in daemon.c I had used "errno" as an
4761 argument name, which causes warnings on some systems. This was basically a
4762 typo, since it was named "eno" in the comments!
4764 4. The code that waits for the clock to tick (at a resolution of some fraction
4765 of a second) so as to ensure message-id uniqueness was always waiting for
4766 at least one whole tick, when it could have waited for less. [This is
4767 almost certainly not relevant at current processor speeds, where it is
4768 unlikely to ever wait at all. But we try to future-proof.]
4770 5. The function that sleeps for a time interval that includes fractions of a
4771 second contained a race. It did not block SIGALRM between setting the
4772 timer, and suspending (a couple of lines later). If the interval was short
4773 and the sigsuspend() was delayed until after it had expired, the suspension
4774 never ended. On busy systems this could lead to processes getting stuck for
4777 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4778 process, before it forks any delivery processes. The open lookup caching
4779 mechanism meant that the open file or database connection was passed into
4780 the delivery process. The problem was that delivery processes always tidy
4781 up cached lookup data. This could cause a problem for the next delivery
4782 process started by the queue runner, because the external queue runner
4783 process does not know about the closure. So the next delivery process
4784 still has data in the lookup cache. In the case of a file lookup, there was
4785 no problem because closing a file descriptor in a subprocess doesn't affect
4786 the parent. However, if the lookup was caching a connection to a database,
4787 the connection was closed, and the second delivery process was likely to
4788 see errors such as "PGSQL: query failed: server closed the connection
4789 unexpectedly". The problem has been fixed by closing all cached lookups
4790 in a queue runner before running a delivery process.
4792 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4793 seem to have the "const" qualifier which it has on other OS. I've
4796 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4797 *of the same type* (client or server) with the same public name that an
4798 error should be diagnosed.
4800 9. When Exim looked up a host name for an IP address, but failed to find the
4801 original IP address when looking up the host name (a safety check), it
4802 output the message "<ip address> does not match any IP for NULL", which was
4803 confusing, to say the least. The bug was that the host name should have
4804 appeared instead of "NULL".
4806 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4807 user that is built into the binary, and the -C or -D options is used, root
4808 privilege is dropped before the configuration file is read. In addition,
4809 logging is switched to stderr instead of the normal log files. If the
4810 configuration then re-defines the Exim user, the unprivileged environment
4811 is probably not what is expected, so Exim logs a panic warning message (but
4814 However, if deliver_drop_privilege is set, the unprivileged state may well
4815 be exactly what is intended, so the warning has been cut out in that case,
4816 and Exim is allowed to try to write to its normal log files.
4822 1. smtp_return_error_details was not giving details for temporary sender
4823 or receiver verification errors.
4825 2. Diagnose a configuration error if two authenticators have the same public
4828 3. Exim used not to create the message log file for a message until the first
4829 delivery attempt. This could be confusing when incoming messages were held
4830 for policy or load reasons. The message log file is now created at the time
4831 the message is received, and an initial "Received" line is written to it.
4833 4. The automatically generated man page for command line options had a minor
4834 bug that caused no ill effects; however, a more serious problem was that
4835 the procedure for building the man page automatically didn't always
4836 operate. Consequently, release 4.20 contains an out-of-date version. This
4837 shouldn't happen again.
4839 5. When building Exim with embedded Perl support, the script that builds the
4840 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4841 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4843 6. The freeze_tell option was not being used for messages that were frozen on
4844 arrival, either by an ACL or by local_scan().
4846 7. Added the smtp_incomplete_transaction log selector.
4848 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4849 was accepting AUTH without a new EHLO.
4851 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4852 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4855 10. Logging of TCP/IP connections (when configured) now happens in the main
4856 daemon process instead of the child process, so that the TCP/IP connection
4857 count is more accurate (but it can never be perfect).
4859 11. The use of "drop" in a nested ACL was not being handled correctly in the
4860 outer ACL. Now, if condition failure induced by the nested "drop" causes
4861 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4862 or "require"), the connection is dropped.
4864 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4865 that yield "discard" can now be used with an "accept" or a "discard" verb,
4866 but an error is generated for any others (because I can't see a useful way
4867 to define what should happen).
4869 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4870 are now processed in the same way as lines in the Exim configuration file.
4871 In particular, continuation lines are supported.
4873 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4875 15. Added -ti meaning -t -i.
4877 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4878 domains, and warn by logging if others are found.
4880 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4881 returned from GIFCONF when Exim is trying to find the list of interfaces on
4882 a host. The code in os.c has been modified to copy each ifreq to an aligned
4883 structure in all cases.
4885 Also, in some cases, the returned ifreq's were being copied to a 'struct
4886 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4887 means the last couple of bytes of an IPv6 address could be chopped if the
4888 ifreq contained only a normal sockaddr (14 bytes storage).
4890 18. Named domain lists were not supported in the hosts_treat_as_local option.
4891 An entry such as +xxxx was not recognized, and was treated as a literal
4894 19. Ensure that header lines added by a DATA ACL are included in the reject log
4895 if the ACL subsequently rejects the message.
4897 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4898 MD5 (which is deprecated).
4900 21. When testing a filter file using -bf, Exim was writing a message when it
4901 took the sender from a "From " line in the message, but it was not doing so
4902 when it took $return_path from a Return-Path: header line. It now does.
4904 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4905 with a valid header line field name (a series of printing characters
4906 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4908 23. Changed "disc" in the source to "disk" to conform to the documentation and
4909 the book and for uniformity.
4911 24. Ignore Sendmail's -Ooption=value command line item.
4913 25. When execve() failed while trying to run a command in a pipe transport,
4914 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4915 could be confused with a return value of 69 from the command itself. This
4916 has been changed to 127, the value the shell returns if it is asked to run
4917 a non-existent command. The wording for the related log line suggests a
4918 non-existent command as the problem.
4920 26. If received_header_text expands to an empty string, do not add a Received:
4921 header line to the message. (Well, it adds a token one on the spool, but
4922 marks it "old" so that it doesn't get used or transmitted.)
4924 27. Installed eximstats 1.28 (addition of -nt option).
4926 28. There was no check for failure on the call to getsockname() in the daemon
4927 code. This can fail if there is a shortage of resources on the system, with
4928 ENOMEM, for example. A temporary error is now given on failure.
4930 29. Contrary to the C standard, it seems that in some environments, the
4931 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4932 program. Exim now does this explicitly; it affects the formatting of
4933 timestamps using strftime().
4935 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4936 complaints. I've now initialized all the variables, to avoid this.
4938 32. Header lines added by a system filter were not being "seen" during
4939 transport-time rewrites.
4941 33. The info_callback() function passed to OpenSSL is set up with type void
4942 (*)(SSL *, int, int), as described somewhere. However, when calling the
4943 function (actually a macro) that sets it up, the type void(*)() is
4944 expected. I've put in a cast to prevent warnings from picky compilers.
4946 34. If a DNS black list lookup found a CNAME record, but there were no A
4947 records associated with the domain it pointed at, Exim crashed.
4949 35. If a DNS black list lookup returned more than one A record, Exim ignored
4950 all but the first. It now scans all returned addresses if a particular IP
4951 value is being sought. In this situation, the contents of the
4952 $dnslist_value variable are a list of all the addresses, separated by a
4955 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4956 to accept a host name and all its aliases if the forward lookup for any of
4957 them yielded the IP address of the incoming connection. Now it accepts only
4958 those names whose forward lookup yields the correct IP address. Any other
4959 names are discarded. This closes a loophole whereby a rogue DNS
4960 administrator could create reverse DNS records to break through a
4961 wildcarded host restriction in an ACL.
4963 37. If a user filter or a system filter that ran in a subprocess used any of
4964 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4965 the wrong values were passed to the pipe command ($thisaddress had the
4966 value of $0, $0 had the value of $1, etc). This bug was introduced by
4967 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4969 38. Improved the line breaking for long SMTP error messages from ACLs.
4970 Previously, if there was no break point between 40 and 75 characters, Exim
4971 left the rest of the message alone. Two changes have been made: (a) I've
4972 reduced the minimum length to 35 characters; (b) if it can't find a break
4973 point between 35 and 75 characters, it looks ahead and uses the first one
4974 that it finds. This may give the occasional overlong line, but at least the
4975 remaining text gets split now.
4977 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4978 file descriptors might be low, and that setting 1000 would always raise it.
4979 It turns out that in some environments, the limit is already over 1000 and
4980 that lowering it causes trouble. So now Exim takes care not to decrease it.
4982 40. When delivering a message, the value of $return_path is set to $sender_
4983 address at the start of routing (routers may change the value). By an
4984 oversight, this default was not being set up when an address was tested by
4985 -bt or -bv, which affected the outcome if any router or filter referred to
4988 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4989 log only when "message" or "log_message" are set. However, if one of the
4990 conditions was an address verification, or a call to a nested ACL, the
4991 messages generated by the underlying test were being passed through. This
4992 no longer happens. The underlying message is available in $acl_verify_
4993 message for both "message" and "log_message" expansions, so it can be
4994 passed through if needed.
4996 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4997 new expansion $bh_ to give the encoded byte string without charset
4998 translation. Translation happens only if iconv() is available; HAVE_ICONV
4999 indicates this at build time. HEADERS_CHARSET gives the charset to
5000 translate to; headers_charset can change it in the configuration, and
5001 "headers charset" can change it in an individual filter file.
5003 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5004 that creates RFC 2047 encoded "words" labels them as that charset instead
5005 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5006 expansion operator; (ii) when Exim creates a From: line for a local
5007 message; (iii) when a header line is rewritten to include a "phrase" part.
5009 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5010 buggy, causing it to skip the first lines of messages whose message ID
5011 ended in 'D'. This would not have bitten before Exim release 4.14, because
5012 message IDs were unlikely to end in 'D' before then. The effect was to have
5013 incorrect size information for certain domains.
5015 45. #include "config.h" was missing at the start of the crypt16.c module. This
5016 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5019 46. If there was a timeout during a "random" callout check, Exim treated it as
5020 a failure of the random address, and carried on sending RSET and the real
5021 address. If the delay was just some slowness somewhere, the response to the
5022 original RCPT would be taken as a response to RSET and so on, causing
5023 mayhem of various kinds.
5025 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5026 when I implemented it. It didn't allow for the fact that some option values
5027 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5028 the right test for positive values.
5030 48. Domain names in DNS records are case-independent. Exim always looks them up
5031 in lower case. Some resolvers return domain names in exactly the case they
5032 appear in the zone file, that is, they may contain uppercase letters. Not
5033 all resolvers do this - some return always lower case. Exim was treating a
5034 change of case by a resolver as a change of domain, similar to a widening
5035 of a domain abbreviation. This triggered its re-routing code and so it was
5036 trying to route what was effectively the same domain again. This normally
5037 caused routing to fail (because the router wouldn't handle the domain
5038 twice). Now Exim checks for this case specially, and just changes the
5039 casing of the domain that it ultimately uses when it transmits the message
5042 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5045 50. If a filter generated a file delivery with a non-absolute name (possible if
5046 no home directory exists for the router), the forbid_file option was not
5049 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5050 the existing equality matching.
5052 52. Exim was using ints instead of ino_t variables in some places where it was
5053 dealing with inode numbers.
5055 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5056 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5057 called TMPDIR, and if it finds it is different, it changes its value.
5059 54. The smtp_printf() function is now made available to local_scan() so
5060 additional output lines can be written before returning. There is also an
5061 smtp_fflush() function to enable the detection of a dropped connection.
5062 The variables smtp_input and smtp_batched_input are exported to
5065 55. Changed the default runtime configuration: the message "Unknown user"
5066 has been removed from the ACL, and instead placed on the localuser router,
5067 using the cannot_route_message feature. This means that any verification
5068 failures that generate their own messages won't get overridden. Similarly,
5069 the "Unrouteable address" message that was in the ACL for unverifiable
5070 relay addresses has also been removed.
5072 56. Added hosts_avoid_esmtp to the smtp transport.
5074 57. The exicyclog script was not checking for the esoteric option
5075 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5076 will work only if exicyclog is run under the appropriate euid.
5078 58. Following a discussion on the list, the rules by which Exim recognises line
5079 endings on incoming messages have been changed. The -dropcr and drop_cr
5080 options are now no-ops, retained only for backwards compatibility. The
5081 following line terminators are recognized: LF CRLF CR. However, special
5082 processing applies to CR:
5084 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5085 nor a local message in the state where . is a terminator.
5087 (ii) If a bare CR is encountered in a header line, an extra space is added
5088 after the line terminator so as not to end the header. The reasoning
5089 behind this is that bare CRs in header lines are most likely either
5090 to be mistakes, or people trying to play silly games.
5092 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5093 was being incorrectly given as 18 bytes larger than it should have been.
5094 This is a VOB (very old bug).
5096 60. This may never have affected anything current, but just in case it has:
5097 When the local host is found other than at the start of a list of hosts,
5098 the local host, those with the same MX, and any that follow, are discarded.
5099 When the list in question was part of a longer list of hosts, the following
5100 hosts (not currently being processed) were also being discarded. This no
5101 longer happens. I'm not sure if this situation could ever has previously
5104 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5107 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5108 header. This is something that is recommended in a new Internet Draft, and
5109 is something that is documented as being done by Sendmail. There are two
5110 possible values. For messages generated by the autoreply transport, Exim
5113 Auto-Submitted: auto-replied
5115 whereas for all other generated messages (e.g. bounces) it adds
5117 Auto-Submitted: auto-generated
5119 63. The "personal" condition in filters now includes a test for the
5120 Auto-Submitted: header. If it contains the string "auto-" the message it
5121 not considered personal.
5123 64. Added rcpt_include_affixes as a generic transport option.
5125 65. Added queue_only_override (default true).
5127 66. Added the syslog_duplication option.
5129 67. If what should have been the first header line of a message consisted of
5130 a space followed by a colon, Exim was mis-interpreting it as a header line.
5131 It isn't of course - it is syntactically invalid and should therefore be
5132 treated as the start of the message body. The misbehaviour could have
5133 caused a number of strange effects, including loss of data in subsequent
5134 header lines, and spool format errors.
5136 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5137 client host had authenticated. This control can now be exercised by an ACL
5138 for more flexibility.
5140 69. By default, callouts do not happen when testing with -bh. There is now a
5141 variant, -bhc, which does actually run the callout code, including
5142 consulting and updating the callout cache.
5144 70. Added support for saslauthd authentication, courtesy of Alexander
5147 71. If statvfs() failed on the spool or log directories while checking their
5148 size for availability, Exim confusingly gave the error "space shortage".
5149 Furthermore, in debugging mode it crashed with a floating point exception.
5150 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5151 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5152 serious problem, Exim now writes to the main and panic logs when this
5153 happens, with details of the failure. It then refuses to accept the
5154 incoming message, giving the message "spool directory problem" or "log
5155 directory problem" with a 421 code for SMTP messages.
5157 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5158 0, 1, and 2 exist, because some OS complain for execs without them (see
5159 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5160 descriptors. However, the code omitted to check that the open succeeded,
5161 causing mysterious errors if for some reason the permissions on /dev/null
5162 got screwed. Now Exim writes a message to the main and panic logs, and
5163 bombs out if it can't open /dev/null.
5165 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5166 interact so that it is all more flexible. It is supposed to remain
5167 backwards compatible. Also added extra_local_interfaces.
5169 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5170 to bomb out with an assertion failure - to the client this appears as a
5171 connection drop. This problem occurs in the part of the code that was taken
5172 from the Samba project. Fortunately, the assertion is in a very simple
5173 function, so I have fixed this by reproducing the function inline in the
5174 one place where it is called, and arranging for authentication to fail
5175 instead of killing the process with assert().
5177 75. The SPA client code was not working when the server requested OEM rather
5178 than Unicode encoding.
5180 76. Added code to make require_files with a specific uid setting more usable in
5181 the case where statting the file as root fails - usually a non-root-mounted
5182 NFS file system. When this happens and the failure is EACCES, Exim now
5183 forks a subprocess and does the per-uid checking as the relevant uid.
5185 77. Added process_log_path.
5187 78. If log_file_path was not explicitly set, a setting of check_log_space or
5188 check_log_inodes was ignored.
5190 79. If a space check for the spool or log partitions fails, the incident is now
5191 logged. Of course, in the latter case the data may get lost...
5193 80. Added the %p formatting code to string_format() so that it can be used to
5194 print addresses in debug_print(). Adjusted all the address printing in the
5195 debugging in store.c to use %p rather than %d.
5197 81. There was a concern that a line of code in smtp_in.c could overflow a
5198 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5199 initially expressed, the concern was not well-founded, because trailing
5200 spaces are removed early. However, if the trailing spaces were followed by
5201 a NULL, they did not get removed, so the overflow was possible. Two fixes
5204 (a) I re-wrote the offending code in a cleaner fashion.
5205 (b) If an incoming SMTP command contains a NULL character, it is rejected
5208 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5209 runs initgroups(), so that if the Exim user is in any additional groups,
5210 they will be used during message reception.
5216 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob