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 NM/01 Workround for PCRE version dependancy in version reporting
12 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
13 This fixes portability to compilers other than gcc, notably
14 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
16 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
17 makefiles for portability to HP-UX and POSIX correctness.
19 PP/01 Permit LOOKUP_foo enabling on the make command-line.
20 Also via indented variable definition in the Makefile.
21 (Debugging by Oliver Heesakkers).
23 PP/02 Restore caching of spamd results with expanded spamd_address.
24 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
26 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
27 Improves build reliability. Fix from: Frank Elsner
29 NM/02 Fix wide character breakage in the rfc2047 coding
30 Fixes bug 1064. Patch from Andrey N. Oktyabrski
32 NM/03 Allow underscore in dnslist lookups
33 Fixes bug 1026. Patch from Graeme Fowler
35 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
36 Code patches from Adam Ciarcinski of NetBSD.
38 NM/04 Fixed exiqgrep to cope with mailq missing size issue
41 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
42 is logged, to avoid truncation. Patch from John Horne.
44 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
45 Patch from Jakob Hirsch.
47 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
48 SQL string expansion failure details.
49 Patch from Andrey Oktyabrski.
51 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
52 Patch from Simon Arlott.
54 PP/09 New lookups functionality failed to compile on old gcc which rejects
55 extern declarations in function scope.
56 Patch from Oliver Fleischmann
58 PP/10 Use sig_atomic_t for flags set from signal handlers.
59 Check getgroups() return and improve debugging.
60 Fixed developed for diagnosis in bug 927 (which turned out to be
63 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
64 Patch from Mark Zealey.
66 PP/12 Bugzilla 1056: Improved spamd server selection.
67 Patch from Mark Zealey.
69 PP/13 Bugzilla 1086: Deal with maildir quota file races.
70 Based on patch from Heiko Schlittermann.
72 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
73 Patch from Uwe Doering, sign-off by Michael Haardt.
79 TF/01 Failure to get a lock on a hints database can have serious
80 consequences so log it to the panic log.
82 TF/02 Log LMTP confirmation messages in the same way as SMTP,
83 controlled using the smtp_confirmation log selector.
85 TF/03 Include the error message when we fail to unlink a spool file.
87 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
88 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
89 for maintaining out-of-tree patches for some time.
91 PP/01 Bugzilla 139: Documentation and portability issues.
92 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
93 Handle per-OS dynamic-module compilation flags.
95 PP/02 Let /dev/null have normal permissions.
96 The 4.73 fixes were a little too stringent and complained about the
97 permissions on /dev/null. Exempt it from some checks.
98 Reported by Andreas M. Kirchwitz.
100 PP/03 Report version information for many libraries, including
101 Exim version information for dynamically loaded libraries. Created
102 version.h, now support a version extension string for distributors
103 who patch heavily. Dynamic module ABI change.
105 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
106 privilege escalation vulnerability whereby the Exim run-time user
107 can cause root to append content of the attacker's choosing to
110 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
113 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
114 If dropping privileges for untrusted macros, we disabled normal logging
115 on the basis that it would fail; for the Exim run-time user, this is not
116 the case, and it resulted in successful deliveries going unlogged.
117 Fixed. Reported by Andreas Metzler.
123 PP/01 Date: & Message-Id: revert to normally being appended to a message,
124 only prepend for the Resent-* case. Fixes regression introduced in
125 Exim 4.70 by NM/22 for Bugzilla 607.
127 PP/02 Include check_rfc2047_length in configure.default because we're seeing
128 increasing numbers of administrators be bitten by this.
130 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
132 PP/03 Bugzilla 994: added openssl_options main configuration option.
134 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
136 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
138 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
140 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
141 without a peer certificate, leading to a segfault because of an
142 assumption that peers always have certificates. Be a little more
143 paranoid. Problem reported by Martin Tscholak.
145 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
146 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
147 NB: ClamAV planning to remove STREAM in "middle of 2010".
148 CL also introduces -bmalware, various -d+acl logging additions and
149 more caution in buffer sizes.
151 PP/09 Implemented reverse_ip expansion operator.
153 PP/10 Bugzilla 937: provide a "debug" ACL control.
155 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
157 PP/12 Bugzilla 973: Implement --version.
159 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
161 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
163 PP/15 Bugzilla 816: support multiple condition rules on Routers.
165 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
166 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
167 ignore trailing whitespace.
169 JJ/02 prevent non-panic DKIM error from being sent to paniclog
171 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
174 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
175 Notification from Dr Andrew Aitchison.
177 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
178 ExtendedDetectionInfo response format.
179 Notification from John Horne.
181 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
184 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
185 XSL and documented dependency on system catalogs, with examples of how
188 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
191 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
192 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
193 configuration file which is writeable by the Exim user or group.
195 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
196 of configuration files to cover files specified with the -C option if
197 they are going to be used with root privileges, not just the default
200 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
201 option (effectively making it always true).
203 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
204 files to be used while preserving root privileges.
206 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
207 that rogue child processes cannot use them.
209 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
210 run-time user, instead of root.
212 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
213 Exim run-time user without dropping privileges.
215 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
216 result string, instead of calling string_vformat() twice with the same
219 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
220 for other users. Others should always drop root privileges if they use
221 -C on the command line, even for a whitelisted configure file.
223 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
225 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
231 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
232 $data_path, and $header_path variables; fixed documentation bugs and
235 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
236 exipick to access non-standard spools, including the "frozen" queue
239 NM/01 Bugzilla 965: Support mysql stored procedures.
240 Patch from Alain Williams
242 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
244 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
245 Patch from Andreas Metzler
247 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
248 Patch from Kirill Miazine
250 NM/05 Bugzilla 671: Added umask to procmail example.
252 JJ/03 installed exipick 20100323.0, fixing doc bug
254 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
255 directory. Notification and patch from Dan Rosenberg.
257 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
259 TK/02 Improve log output when DKIM signing operation fails.
261 MH/01 Treat the transport option dkim_domain as a colon separated
262 list, not as a single string, and sign the message with each element,
263 omitting multiple occurences of the same signer.
265 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
266 Bugzilla 985, 986. Patch by Simon Arlott
268 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
269 Patch by Simon Arlott
271 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
272 MBX locking. Notification from Dan Rosenberg.
278 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
280 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
282 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
284 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
286 NM/04 Bugzilla 915: Flag broken perl installation during build.
292 TK/01 Added patch by Johannes Berg that expands the main option
293 "spamd_address" if it starts with a dollar sign.
295 TK/02 Write list of recipients to X-Envelope-Sender header when building
296 the mbox-format spool file for content scanning (suggested by Jakob
299 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
300 (http://www.dcc-servers.net/) support via dccifd. Activated by
301 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
303 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
304 by Mark Daniel Reidel <mr@df.eu>.
306 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
307 When building exim an external PCRE library is now needed -
308 PCRE is a system library on the majority of modern systems.
309 See entry on PCRE_LIBS in EDITME file.
311 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
312 conversation. Added nologin parameter to request.
313 Patch contributed by Kirill Miazine.
315 TF/01 Do not log submission mode rewrites if they do not change the address.
317 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
319 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
320 log files in place. Contributed by Roberto Lima.
322 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
324 TF/03 Bugzilla 615: When checking the local_parts router precondition
325 after a local_part_suffix or local_part_prefix option, Exim now
326 does not use the address's named list lookup cache, since this
327 contains cached lookups for the whole local part.
329 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
330 Robert Millan. Documentation is in experimental-spec.txt.
332 TF/04 Bugzilla 668: Fix parallel build (make -j).
334 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
336 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
337 Patch provided by Jan Srzednicki.
339 TF/05 Leading white space used to be stripped from $spam_report which
340 wrecked the formatting. Now it is preserved.
342 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
343 that they are available at delivery time.
345 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
347 TF/08 TLS error reporting now respects the incoming_interface and
348 incoming_port log selectors.
350 TF/09 Produce a more useful error message if an SMTP transport's hosts
351 setting expands to an empty string.
353 NM/06 Bugzilla 744: EXPN did not work under TLS.
354 Patch provided by Phil Pennock.
356 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
357 Patch provided by Richard Godbee.
359 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
360 acl_smtp_notquit, added index entry.
362 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
363 Patch provided by Eugene Bujak.
365 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
366 accept(). Patch provided by Maxim Dounin.
368 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
369 Patch provided by Phil Pennock.
371 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
373 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
374 Patch provided by Brad "anomie" Jorsch.
376 NM/14 Bugzilla 622: Added timeout setting to transport filter.
377 Patch provided by Dean Brooks.
379 TK/05 Add native DKIM support (does not depend on external libraries).
381 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
382 Patch provided by Graeme Fowler.
384 NM/16 Bugzilla 851: Documentation example syntax fix.
386 NM/17 Changed NOTICE file to remove references to embedded PCRE.
388 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
391 NM/19 Bugzilla 745: TLS version reporting.
392 Patch provided by Phil Pennock.
394 NM/20 Bugzilla 167: bool: condition support.
395 Patch provided by Phil Pennock.
397 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
398 clients. Patch provided by Phil Pennock.
400 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
401 Patch provided by Brad "anomie" Jorsch.
403 NM/23 Bugzilla 687: Fix misparses in eximstats.
404 Patch provided by Heiko Schlittermann.
406 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
407 Patch provided by Heiko Schlittermann.
409 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
410 plus update to original patch.
412 NM/26 Bugzilla 799: Documentation correction for ratelimit.
414 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
415 Patch provided by David Brownlee.
417 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
419 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
421 NM/30 Bugzilla 888: TLS documentation bugfixes.
423 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
425 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
426 Unlike the original bugzilla I have changed all shell scripts in src tree.
428 NM/33 Bugzilla 898: Transport filter timeout fix.
429 Patch by Todd Rinaldo.
431 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
432 Patch by Serge Demonchaux.
434 NM/35 Bugzilla 39: Base64 decode bug fixes.
435 Patch by Jakob Hirsch.
437 NM/36 Bugzilla 909: Correct connect() call in dcc code.
439 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
441 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
443 NM/39 Bugzilla 911: Fixed MakeLinks build script.
449 TK/01 Add preliminary DKIM support. Currently requires a forked version of
450 ALT-N's libdkim that I have put here:
451 http://duncanthrax.net/exim-experimental/
453 Note to Michael Haardt: I had to rename some vars in sieve.c. They
454 were called 'true' and it seems that C99 defines that as a reserved
455 keyword to be used with 'bool' variable types. That means you could
456 not include C99-style headers which use bools without triggering
457 build errors in sieve.c.
459 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
460 as mailq or other aliases. Changed the --help handling significantly
461 to do whats expected. exim_usage() emits usage/help information.
463 SC/01 Added the -bylocaldomain option to eximstats.
465 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
467 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
469 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
475 PH/01 Another patch from the Sieve maintainer.
477 PH/02 When an IPv6 address is converted to a string for single-key lookup
478 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
479 dots are used instead of colons so that keys in lsearch files need not
480 contain colons. This was done some time before quoting was made available
481 in lsearch files. However, iplsearch files do require colons in IPv6 keys
482 (notated using the quote facility) so as to distinguish them from IPv4
483 keys. This meant that lookups for IP addresses in host lists did not work
484 for iplsearch lookups.
486 This has been fixed by arranging for IPv6 addresses to be expressed with
487 colons if the lookup type is iplsearch. This is not incompatible, because
488 previously such lookups could never work.
490 The situation is now rather anomolous, since one *can* have colons in
491 ordinary lsearch keys. However, making the change in all cases is
492 incompatible and would probably break a number of configurations.
494 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
497 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
498 conversion specification without a maximum field width, thereby enabling
499 a rogue spamd server to cause a buffer overflow. While nobody in their
500 right mind would setup Exim to query an untrusted spamd server, an
501 attacker that gains access to a server running spamd could potentially
502 exploit this vulnerability to run arbitrary code as the Exim user.
504 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
505 $primary_hostname instead of what libspf2 thinks the hosts name is.
507 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
508 a directory entry by the name of the lookup key. Previously, if a
509 symlink pointed to a non-existing file or a file in a directory that
510 Exim lacked permissions to read, a lookup for a key matching that
511 symlink would fail. Now it is enough that a matching directory entry
512 exists, symlink or not. (Bugzilla 503.)
514 PH/03 The body_linecount and body_zerocount variables are now exported in the
517 PH/04 Added the $dnslist_matched variable.
519 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
520 This means they are set thereafter only if the connection becomes
523 PH/06 Added the client_condition to authenticators so that some can be skipped
524 by clients under certain conditions.
526 PH/07 The error message for a badly-placed control=no_multiline_responses left
527 "_responses" off the end of the name.
529 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
531 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
532 (without spaces) instead of just copying the configuration text.
534 PH/10 Added the /noupdate option to the ratelimit ACL condition.
536 PH/11 Added $max_received_linelength.
538 PH/12 Added +ignore_defer and +include_defer to host lists.
540 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
541 way in which PCRE > 7.0 is built.
543 PH/14 Implemented queue_only_load_latch.
545 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
546 MAIL command. The effect was to mangle the value on 64-bit systems.
548 PH/16 Another patch from the Sieve maintainer.
550 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
552 PH/18 If a system quota error occurred while trying to create the file for
553 a maildir delivery, the message "Mailbox is full" was not appended to the
554 bounce if the delivery eventually timed out. Change 4.67/27 below applied
555 only to a quota excession during the actual writing of the file.
557 PH/19 It seems that peer DN values may contain newlines (and other non-printing
558 characters?) which causes problems in log lines. The DN values are now
559 passed through string_printing() before being added to log lines.
561 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
562 and InterBase are left for another time.)
564 PH/21 Added message_body_newlines option.
566 PH/22 Guard against possible overflow in moan_check_errorcopy().
568 PH/23 POSIX allows open() to be a macro; guard against that.
570 PH/24 If the recipient of an error message contained an @ in the local part
571 (suitably quoted, of course), incorrect values were put in $domain and
572 $local_part during the evaluation of errors_copy.
578 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
579 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
582 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
583 issue a MAIL command.
585 PH/02 In an ACL statement such as
587 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
589 if a client was not listed at all, or was listed with a value other than
590 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
591 the condition was not true (as it should be), so access was not denied.
592 The bug was that the ! inversion was incorrectly passed on to the second
593 item. This has been fixed.
595 PH/03 Added additional dnslists conditions == and =& which are different from
596 = and & when the dns lookup returns more than one IP address.
598 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
599 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
601 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
602 FSYNC, which compiles an option called disable_fsync that allows for
603 bypassing fsync(). The documentation is heavily laced with warnings.
605 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
607 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
608 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
609 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
610 including adding "make clean"; (3) Added -fPIC when compiling the test
611 dynamically loaded module, to get rid of a warning.
613 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
614 message fails, move_frozen_messages = true and ignore_bounce_errors_after
615 = 0s. The bug is otherwise harmless.
617 PH/07 There was a bug in the dovecot authenticator such that the value of
618 $auth1 could be overwritten, and so not correctly preserved, after a
619 successful authentication. This usually meant that the value preserved by
620 the server_setid option was incorrect.
622 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
624 PH/09 Installed PCRE release 7.0.
626 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
627 run for batched SMTP input. It is now run at the start of every message
628 in the batch. While fixing this I discovered that the process information
629 (output by running exiwhat) was not always getting set for -bs and -bS
630 input. This is fixed, and it now also says "batched" for BSMTP.
632 PH/11 Added control=no_pipelining.
634 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
635 patch, slightly modified), and move the expansion of helo_data till after
636 the connection is made in the smtp transport (so it can use these
639 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
641 PH/14 Added log_selector = +pid.
643 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
645 PH/16 Add ${if forany and ${if forall.
647 PH/17 Added dsn_from option to vary the From: line in DSNs.
649 PH/18 Flush SMTP output before performing a callout, unless control =
650 no_callout_flush is set.
652 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
653 was true (the default) a successful delivery failed to delete the retry
654 item, thus causing premature timeout of the address. The bug is now
657 PH/20 Added hosts_avoid_pipelining to the smtp transport.
659 PH/21 Long custom messages for fakedefer and fakereject are now split up
660 into multiline reponses in the same way that messages for "deny" and
661 other ACL rejections are.
663 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
664 with slight modification.
666 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
667 draft, changing the syntax and factoring some duplicate code".
669 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
670 for deliveries of the second and subsequent messages over the same SMTP
673 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
674 ${reduce, with only minor "tidies".
676 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
678 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
679 expansion side effects.
681 PH/27 When a message times out after an over-quota error from an Exim-imposed
682 quota, the bounce message says "mailbox is full". This message was not
683 being given when it was a system quota that was exceeded. It now should
686 MH/03 Made $recipients available in local_scan(). local_scan() already has
687 better access to the recipient list through recipients_list[], but
688 $recipients can be useful in postmaster-provided expansion strings.
690 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
691 in the case of a MAIL command with additional options following the
692 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
693 were accidentally chopped off.
695 PH/29 SMTP synchronization checks are implemented when a command is read -
696 there is a check that no more input is waiting when there shouldn't be
697 any. However, for some commands, a delay in an ACL can mean that it is
698 some time before the response is written. In this time, more input might
699 arrive, invalidly. So now there are extra checks after an ACL has run for
700 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
701 pipelining has not been advertised.
703 PH/30 MH's patch to allow iscntrl() characters to be list separators.
705 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
706 returned in the SMTP response when smtp_return_error_details was false.
709 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
710 instead of the C I/O that was originally supplied, because problems were
713 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
714 Exim which did not show up earlier: it was assuming that a call to
715 SSL_CTX_set_info_callback() might give an error value. In fact, there is
716 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
717 was a macro that became an assignment, so it seemed to work. This has
718 changed to a proper function call with a void return, hence the compile
719 error. Exim's code has been fixed.
721 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
724 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
726 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
728 PH/37 If a message is not accepted after it has had an id assigned (e.g.
729 because it turns out to be too big or there is a timeout) there is no
730 "Completed" line in the log. When some messages of this type were
731 selected by exigrep, they were listed as "not completed". Others were
732 picked up by some special patterns. I have improved the selection
733 criteria to be more general.
735 PH/38 The host_find_failed option in the manualroute router can now be set
736 to "ignore", to completely ignore a host whose IP address cannot be
737 found. If all hosts are ignored, the behaviour is controlled by the new
738 host_all_ignored option.
740 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
741 homing or because of multiple MX records with /mx) generated more than
742 one IP address, and the following item turned out to be the local host,
743 all the secondary addresses of the first item were incorrectly removed
744 from the list, along with the local host and any following hosts (which
745 is what is supposed to happen).
747 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
748 whoever called Exim into the -H file. In the case of the daemon it was
749 behaving confusingly. When first started, it used values for whoever
750 started the daemon, but after a SIGHUP it used the Exim user (because it
751 calls itself on a restart). I have changed the code so that it now always
754 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
755 message are rejected with the same error (e.g. no authentication or bad
756 sender address), and a DATA command is nevertheless sent (as can happen
757 with PIPELINING or a stupid MUA), the error message that was given to the
758 RCPT commands is included in the rejection of the DATA command. This is
759 intended to be helpful for MUAs that show only the final error to their
762 PH/42 Another patch from the Sieve maintainer.
764 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
765 Eximstats - Fixed some broken HTML links and added missing column headers
767 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
768 columns for Rejects, Temp Rejects, Ham, and Spam rows.
770 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
772 PH/43 Yet another patch from the Sieve maintainer.
774 PH/44 I found a way to check for a TCP/IP connection going away before sending
775 the response to the final '.' that terminates a message, but only in the
776 case where the client has not sent further data following the '.'
777 (unfortunately, this is allowed). However, in many cases there won't be
778 any further data because there won't be any more messages to send. A call
779 to select() can be used: if it shows that the input is "ready", there is
780 either input waiting, or the socket has been closed. An attempt to read
781 the next input character can distinguish the two cases. Previously, Exim
782 would have sent an OK response which the client would never have see.
783 This could lead to message repetition. This fix should cure that, at
784 least in a lot of common cases.
786 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
787 advertised in response to EHLO.
793 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
794 fixed by 4.65/MH/01 (is this a record?) are fixed:
796 (i) An empty string was always treated as zero by the numeric comparison
797 operators. This behaviour has been restored.
799 (ii) It is documented that the numeric comparison operators always treat
800 their arguments as decimal numbers. This was broken in that numbers
801 starting with 0 were being interpreted as octal.
803 While fixing these problems I realized that there was another issue that
804 hadn't been noticed. Values of message_size_limit (both the global option
805 and the transport option) were treated as octal if they started with 0.
806 The documentation was vague. These values are now always treated as
807 decimal, and I will make that clear in the documentation.
813 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
814 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
817 MH/01 Don't check that the operands of numeric comparison operators are
818 integers when their expansion is in "skipping" mode (fixes bug
819 introduced by 4.64-PH/07).
821 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
822 child addresses, Exim now panics and dies. Previously, because the count
823 is held in a short int, deliveries were likely to be lost. As such a
824 large number of recipients for a single message is ridiculous
825 (performance will be very, very poor), I have chosen to impose a limit
826 rather than extend the field.
832 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
833 leftover -K file (the existence of which was triggered by #402).
834 While we were at it, introduced process PID as part of the -K
835 filename. This should rule out race conditions when creating
838 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
839 processing considerably. Previous code took too long for large mails,
840 triggering a timeout which in turn triggers #401.
842 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
843 in the DK code in transports.c. sendfile() is not really portable,
844 hence the _LINUX specificness.
846 TF/01 In the add_headers option to the mail command in an Exim filter,
847 there was a bug that Exim would claim a syntax error in any
848 header after the first one which had an odd number of characters
851 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
852 callout verification, Exim cached a "reject" for the entire domain. This
853 is correct for most verifications, but it is not correct for a recipient
854 verification with use_sender or use_postmaster set, because in that case
855 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
856 case of MAIL FROM:<> rejection from other early rejections (e.g.
857 rejection of HELO). When verifying a recipient using a non-null MAIL
858 address, the cache is ignored if it shows MAIL FROM:<> rejection.
859 Whatever the result of the callout, the value of the domain cache is
860 left unchanged (for any other kind of callout, getting as far as trying
861 RCPT means that the domain itself is ok).
863 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
866 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
867 manifest itself as EPIPE rather than ECONNECT. When tidying away a
868 session, the daemon ignores ECONNECT errors and logs others; it now
869 ignores EPIPE as well.
871 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
872 (quoted-printable decoding).
874 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
875 later the small subsequent patch to fix an introduced bug.
877 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
879 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
881 PH/08 An error is now given if message_size_limit is specified negative.
883 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
884 to be given (somewhat) arbitrary names.
886 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
889 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
890 miscellaneous code fixes
892 PH/10 Added the log_reject_target ACL modifier to specify where to log
895 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
896 hostname. This is wrong, because it relates to the incoming message (and
897 probably the interface on which it is arriving) and not to the outgoing
898 callout (which could be using a different interface). This has been
899 changed to use the value of the helo_data option from the smtp transport
900 instead - this is what is used when a message is actually being sent. If
901 there is no remote transport (possible with a router that sets up host
902 addresses), $smtp_active_hostname is used.
904 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
905 tweaks were necessary in order to get it to work (see also 21 below):
906 (a) The code assumed that strncpy() returns a negative number on buffer
907 overflow, which isn't the case. Replaced with Exim's string_format()
909 (b) There were several signed/unsigned issues. I just did the minimum
910 hacking in of casts. There is scope for a larger refactoring.
911 (c) The code used strcasecmp() which is not a standard C function.
912 Replaced with Exim's strcmpic() function.
913 (d) The code set only $1; it now sets $auth1 as well.
914 (e) A simple test gave the error "authentication client didn't specify
915 service in request". It would seem that Dovecot has changed its
916 interface. Fortunately there's a specification; I followed it and
917 changed what the client sends and it appears to be working now.
919 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
922 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
923 address A is aliased to B and C, where B exists and C does not. Without
924 -v the output is "A verified" because verification stops after a
925 successful redirection if more than one address is generated. However,
926 with -v the child addresses are also verified. Exim was outputting "A
927 failed to verify" and then showing the successful verification for C,
928 with its parentage. It now outputs "B failed to verify", showing B's
929 parentage before showing the successful verification of C.
931 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
932 look up a TXT record in a specific list after matching in a combined
935 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
936 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
937 they consult the DNS. I had assumed they would set it the way they
938 wanted; and indeed my experiments on Linux seem to show that in some
939 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
940 To be on the safe side, however, I have now made the interface to
941 host_find_byname() similar to host_find_bydns(), with an argument
942 containing the DNS resolver options. The host_find_byname() function now
943 sets these options at its start, just as host_find_bydns() does. The smtp
944 transport options dns_qualify_single and dns_search_parents are passed to
945 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
946 of host_find_byname() use the default settings of RES_DEFNAMES
947 (qualify_single) but not RES_DNSRCH (search_parents).
949 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
950 spool_read_header() do less string testing, by means of a preliminary
951 switch on the second character of optional "-foo" lines. (This is
952 overdue, caused by the large number of possibilities that now exist.
953 Originally there were few.) While I was there, I also converted the
954 str(n)cmp tests so they don't re-test the leading "-" and the first
955 character, in the hope this might squeeze out yet more improvement.
957 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
958 flag allowing group syntax was set by the header_syntax check but not
959 turned off, possible causing trouble later; (2) The flag was not being
960 set at all for the header_verify test, causing "group"-style headers to
961 be rejected. I have now set it in this case, and also caused header_
962 verify to ignore an empty address taken from a group. While doing this, I
963 came across some other cases where the code for allowing group syntax
964 while scanning a header line wasn't quite right (mostly, not resetting
965 the flag correctly in the right place). These bugs could have caused
966 trouble for malformed header lines. I hope it is now all correct.
968 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
969 with the "reply" argument non-NULL. The code, however (which originally
970 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
971 but it didn't always do it. This confused somebody who was copying the
972 code for some other use. I have removed all the tests.
974 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
975 feature that was used to support insecure browsers during the U.S. crypto
976 embargo. It requires special client support, and Exim is probably the
977 only MTA that supported it -- and would never use it because real RSA is
978 always available. This code has been removed, because it had the bad
979 effect of slowing Exim down by computing (never used) parameters for the
980 RSA_EXPORT functionality.
982 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
983 authenticator to fail if there's a tab character in the incoming data
984 (there should never be unless someone is messing about, as it's supposed
985 to be base64-encoded). Also added, on Timo's advice, the "secured" option
986 if the connection is using TLS or if the remote IP is the same as the
987 local IP, and the "valid-client-cert option" if a client certificate has
990 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
991 authenticators. This can be used for authorization after authentication
992 succeeds. (In the case of plaintext, it servers for both authentication
995 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
996 if any retry times were supplied.
998 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
999 connection, where there is no client IP address to check. In this
1000 situation, the verify now always succeeds.
1002 PH/25 Applied John Jetmore's -Mset patch.
1004 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1006 PH/27 In a string expansion for a processed (not raw) header when multiple
1007 headers of the same name were present, leading whitespace was being
1008 removed from all of them, but trailing whitespace was being removed only
1009 from the last one. Now trailing whitespace is removed from each header
1010 before concatenation. Completely empty headers in a concatenation (as
1011 before) are ignored.
1013 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1014 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1016 PH/29 [Removed. This was a change that I later backed out, and forgot to
1017 correct the ChangeLog entry (that I had efficiently created) before
1018 committing the later change.]
1020 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1021 address errors (4xx response to RCPT) over the same connection as other
1022 messages routed to the same hosts. Such deliveries are always "forced",
1023 so retry times are not inspected. This resulted in far too many retries
1024 for the affected addresses. The effect occurred only when there were more
1025 hosts than the hosts_max_try setting in the smtp transport when it had
1026 the 4xx errors. Those hosts that it had tried were not added to the list
1027 of hosts for which the message was waiting, so if all were tried, there
1028 was no problem. Two fixes have been applied:
1030 (i) If there are any address or message errors in an SMTP delivery, none
1031 of the hosts (tried or untried) are now added to the list of hosts
1032 for which the message is waiting, so the message should not be a
1033 candidate for sending over the same connection that was used for a
1034 successful delivery of some other message. This seems entirely
1035 reasonable: after all the message is NOT "waiting for some host".
1036 This is so "obvious" that I'm not sure why it wasn't done
1037 previously. Hope I haven't missed anything, but it can't do any
1038 harm, as the worst effect is to miss an optimization.
1040 (ii) If, despite (i), such a delivery is accidentally attempted, the
1041 routing retry time is respected, so at least it doesn't keep
1042 hammering the server.
1044 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1045 in ${readsocket because some servers need this prod.
1047 PH/32 Added some extra debug output when updating a wait-xxx database.
1049 PH/33 The hint "could be header name not terminated by colon", which has been
1050 given for certain expansion errors for a long time, was not being given
1051 for the ${if def:h_colon_omitted{... case.
1053 PH/34 The spec says: "With one important exception, whenever a domain list is
1054 being scanned, $domain contains the subject domain." There was at least
1055 one case where this was not true.
1057 PH/35 The error "getsockname() failed: connection reset by peer" was being
1058 written to the panic log as well as the main log, but it isn't really
1059 panic-worthy as it just means the connection died rather early on. I have
1060 removed the panic log writing for the ECONNRESET error when getsockname()
1063 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1064 runs only) independently of the message's sender address. This meant
1065 that, if the 4xx error was in fact related to the sender, a different
1066 message to the same recipient with a different sender could confuse
1067 things. In particualar, this can happen when sending to a greylisting
1068 server, but other circumstances could also provoke similar problems.
1069 I have changed the default so that the retry time for these errors is now
1070 based a combination of the sender and recipient addresses. This change
1071 can be overridden by setting address_retry_include_sender=false in the
1074 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1075 remote server are returned as part of bounce messages. This was not
1076 happening for LMTP over a pipe (the lmtp transport), but now it is the
1077 same for both kinds of LMTP.
1079 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1080 in header lines that were in fact CNAMEs. This is no longer the case.
1082 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1083 and queue runs started by the daemon processed all messages. This has
1084 been fixed so that -R and -S can now usefully be given with -q<time>.
1086 PH/40 Import PCRE release 6.7 (fixes some bugs).
1088 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1090 PH/42 Give an error if -q is specified more than once.
1092 PH/43 Renamed the variables $interface_address and $interface_port as
1093 $received_ip_address and $received_port, to make it clear that these
1094 values apply to message reception, and not to the outgoing interface when
1095 a message is delivered. (The old names remain recognized, of course.)
1097 PH/44 There was no timeout on the connect() call when using a Unix domain
1098 socket in the ${readsocket expansion. There now is.
1100 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1101 be meaningful with "accept".
1103 SC/01 Eximstats V1.43
1104 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1106 SC/02 Eximstats V1.44
1107 Use a glob alias rather than an array ref in the generated
1108 parser. This improves both readability and performance.
1110 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1111 Collect SpamAssassin and rejection statistics.
1112 Don't display local sender or destination tables unless
1113 there is data to show.
1114 Added average volumes into the top table text output.
1116 SC/04 Eximstats V1.46
1117 Collect data on the number of addresses (recipients)
1118 as well as the number of messages.
1120 SC/05 Eximstats V1.47
1121 Added 'Message too big' to the list of mail rejection
1122 reasons (thanks to Marco Gaiarin).
1124 SC/06 Eximstats V1.48
1125 Mainlog lines which have GMT offsets and are too short to
1126 have a flag are now skipped.
1128 SC/07 Eximstats V1.49 (Alain Williams)
1129 Added the -emptyok flag.
1131 SC/08 Eximstats V1.50
1132 Fixes for obtaining the IP address from reject messages.
1134 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1135 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1136 whitesspace changes from 4.64-PH/27
1138 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1141 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1142 are found, allow negative numbers in numeric criteria)
1144 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1146 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1147 to match changes made in 4.64-PH/43
1149 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1151 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1152 "domain" is actually an IP address, and force a failure. This locks out
1153 those revolvers/nameservers that support "A-for-A" lookups, in
1154 contravention of the specifications.
1156 PH/48 When a host name was looked up from an IP address, and the subsequent
1157 forward lookup of the name timed out, the host name was left in
1158 $sender_host_name, contrary to the specification.
1160 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1161 restricted to single-key lookups, Exim was not diagnosing an error if
1162 * or *@ was used with a query-style lookup.
1164 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1166 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1167 long ago, but noone interested enough thought of it. Let's just say that
1168 the "1.1" means that there are some new functions that weren't there at
1169 some point in the past.
1171 PH/51 Error processing for expansion failure of helo_data from an smtp
1172 transport during callout processing was broken.
1174 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1175 tested/used via the -bh/-bhc/-bs options.
1177 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1178 bug, fixed in subsequent PCRE releases).
1180 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1181 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1183 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1189 SC/01 Use a glob alias rather than an array ref in eximstats generated
1190 parser. This improves both readability and performance.
1192 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1193 Don't display local sender or destination tables in eximstats unless
1194 there is data to show.
1195 Added average volumes into the eximstats top table text output.
1197 SC/03 Collect data on the number of addresses (recipients) as well
1198 as the number of messages in eximstats.
1200 TF/01 Correct an error in the documentation for the redirect router. Exim
1201 does (usually) call initgroups() when daemonizing.
1203 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1204 with consistent privilege compared to when running as a daemon.
1206 TF/03 Note in the spec that $authenticated_id is not set for local
1207 submissions from trusted users.
1209 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1210 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1212 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1213 by adding some example configuration directives to the default
1214 configuration file. A little bit of work is required to uncomment the
1215 directives and define how usernames and passwords are checked, but
1216 there is now a framework to start from.
1218 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1219 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1220 without this. I don't know how relevant this is to other LDAP libraries.
1222 PH/02 Add the verb name to the "unknown ACL verb" error.
1224 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1226 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1228 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1229 directory not expanded when it should be if an expanded home directory
1230 was set for the address (which is overridden by the transport).
1232 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1235 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1236 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1237 because it is too late at that time, and has no effect.
1239 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1240 security issue with \' (bugzilla #107). I could not use the
1241 PQescapeStringConn() function, because it needs a PGconn value as one of
1244 PH/08 When testing addresses using -bt, indicate those final addresses that
1245 are duplicates that would not cause an additional delivery. At least one
1246 person was confused, thinking that -bt output corresponded to deliveries.
1247 (Suppressing duplicates isn't a good idea as you lose the information
1248 about possibly different redirections that led to the duplicates.)
1250 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1251 systems where poll() doesn't work, in particular OS X.
1253 PH/10 Added more information to debugging output for retry time not reached.
1255 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1256 operations in malware.c.
1258 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1261 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1262 syslog_duplication set false, log lines that would normally be written
1263 both the the main log and to the reject log were not written to syslog at
1266 PH/14 In the default configuration, change the use of "message" in ACL warn
1267 statements to "add_header".
1269 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1270 not followed by a command (e.g. "seen endif").
1272 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1273 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1276 PH/17 Added extra conditions to the default value of delay_warning_condition
1280 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1281 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1282 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1285 The Auto-Submitted: and various List- headers are standardised, whereas I
1286 don't think Precedence: ever was.
1288 PH/18 Refactored debugging code in route_finduser() to show more information,
1289 in particular, the error code if getpwnam() issues one.
1291 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1292 This is apparently needed in addition to the PH/07 change above to avoid
1293 any possible encoding problems.
1295 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1296 but not after initializing Perl.
1298 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1299 output them only if debugging. By default they are written stderr,
1300 apparently, which is not desirable.
1302 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1305 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1308 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1310 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1311 authenticated or an ident call has been made. Suppress the default
1312 values for $authenticated_id and $authenticated_sender (but permit -oMai
1313 and -oMas) when testing with -bh.
1315 PH/24 Re-jigged the order of the tests in the default configuration so that the
1316 tests for valid domains and recipients precede the DNS black list and CSA
1317 tests, on the grounds that those ones are more expensive.
1319 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1320 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1321 This bug exists in every version of Exim that I still have, right back to
1324 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1325 However, an attempt to turn on case-sensitivity in a regex key by
1326 including (?-i) didn't work because the subject string was already
1327 lowercased, and the effects were non-intuitive. It turns out that a
1328 one-line patch can be used to allow (?-i) to work as expected.
1334 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1335 other effects) broke the use of negated acl sub-conditions.
1337 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1340 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1341 "Deny" causes Exim to reject the incoming connection with a 554 error.
1342 Unfortunately, if there is a major crisis, such as a disk failure,
1343 tcp-wrappers gives "deny", whereas what one would like would be some
1344 kind of temporary error. A kludge has been added to help with this.
1345 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1346 554 error is used if errno is still zero or contains ENOENT (which occurs
1347 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1350 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1352 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1353 errors. Otherwise a message that provokes a temporary error (when other
1354 messages do not) can cause a whole host to time out.
1356 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1357 addresses were routed directly to files or pipes from a redirect router.
1358 File deliveries just didn't batch; pipe deliveries might have suffered
1361 PH/06 A failure to get a lock for a hints database would erroneously always say
1362 "Failed to get write lock", even when it was really a read lock.
1364 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1365 of 0600. This has been changed to use the value of the lockfile_mode
1366 option (which defaults to 0600).
1368 PH/08 Applied small patch from the Sieve maintainer.
1370 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1371 folder from quota calculations, a direct delivery into this folder messed
1372 up the contents of the maildirsize file. This was because the regex was
1373 used only to exclude .Trash (or whatever) when the size of the mailbox
1374 was calculated. There was no check that a delivery was happening into an
1375 excluded directory. This bug has been fixed by ignoring all quota
1376 processing for deliveries into excluded directories.
1378 PH/10 Added the maildirfolder_create_regex option to appendfile.
1384 PH/01 The code for finding all the local interface addresses on a FreeBSD
1385 system running IPv6 was broken. This may well have applied to all BSD
1386 systems, as well as to others that have similar system calls. The broken
1387 code found IPv4 interfaces correctly, but gave incorrect values for the
1388 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1389 that it would not match correctly against @[] and not recognize the IPv6
1392 PH/02 The ipliteral router was not recognizing addresses of the form user@
1393 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1395 PH/03 Added disable_ipv6.
1397 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1398 decoded form, because it is most often used to construct To: headers
1399 lines in autoreplies, and the decoded form may well be syntactically
1400 invalid. However, $reply_address has leading white space removed, and all
1401 newlines turned into spaces so that the autoreply transport does not
1404 PH/05 If group was specified without a user on a router, and no group or user
1405 was specified on a transport, the group from the router was ignored.
1407 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1408 for visible compile-time settings that can be used to change these
1409 numbers, for those that want even more. Backwards compatibility with old
1410 spool files has been maintained. However, going back to a previous Exim
1411 release will lost any variables that are in spool files.
1413 PH/07 Two small changes when running in the test harness: increase delay when
1414 passing a TCP/IP connection to a new process, in case the original
1415 process has to generate a bounce, and remove special handling of
1416 127.0.0.2 (sic), which is no longer necessary.
1418 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1419 be the same on different OS.
1421 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1424 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1425 whether --show-vars was specified or not
1427 JJ/02 exipick: Added support for new ACL variable spool format introduced
1430 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1431 syntactically invalid From: or Reply-to: line, and a filter used this to
1432 generate an autoreply, and therefore failed to obtain an address for the
1433 autoreply, Exim could try to deliver to a non-existent relative file
1434 name, causing unrelated and misleading errors. What now happens is that
1435 it logs this as a hard delivery error, but does not attempt to create a
1438 PH/11 The exinext utility has a -C option for testing purposes, but although
1439 the given file was scanned by exinext itself; it wasn't being passed on
1440 when Exim was called.
1442 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1443 an end-of-file indication when reading a command response.
1445 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1446 compiled. In many other places in Exim, IPv6 addresses are always
1447 recognized, so I have changed this. It also means that IPv4 domain
1448 literals of the form [IPV4:n.n.n.n] are now always recognized.
1450 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1451 used if the router is not running as root, for example, when verifying at
1452 ACL time, or when using -bh. The debugging output from this situation was
1453 non-existent - all you got was a failure to exec. I have made two
1456 (a) Failures to set uid/gid, the current directory, or a process leader
1457 in a subprocess such as that created by queryprogram now generate
1458 suitable debugging ouput when -d is set.
1460 (b) The queryprogram router detects when it is not running as root,
1461 outputs suitable debugging information if -d is set, and then runs
1462 the subprocess without attempting to change uid/gid.
1464 PH/15 Minor change to Makefile for building test_host (undocumented testing
1467 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1468 additional section of a DNS packet that returns MX or SRV records.
1469 Instead, it always explicitly searches for A/AAAA records. This avoids
1470 major problems that occur when a DNS server includes only records of one
1471 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1472 fixed another bug: if SRV records were looked up and the corresponding
1473 address records were *not* found in the additional section, the port
1474 values from the SRV records were lost.
1476 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1477 using the correct key (the original address) when searching the retry
1478 rules in order to find which one to use for generating the retry hint.
1480 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1481 adding the default one. Similarly, if it contains a Reply-To: header, the
1482 errors_reply_to option, if set, is not used.
1484 PH/19 When calculating a retry time, Exim used to measure the "time since
1485 failure" by looking at the "first failed" field in the retry record. Now
1486 it does not use this if it is later than than the arrival time of the
1487 message. Instead it uses the arrival time. This makes for better
1488 behaviour in cases where some deliveries succeed, thus re-setting the
1489 "first failed" field. An example is a quota failure for a huge message
1490 when small messages continue to be delivered. Without this change, the
1491 "time since failure" will always be short, possible causing more frequent
1492 delivery attempts for the huge message than are intended.
1493 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1495 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1496 $1, $2, $3) because the numerical variables can be reset during some
1497 expansion items (e.g. "match"), thereby losing the authentication data.
1499 PH/21 Make -bV show the size of off_t variables so that the test suite can
1500 decide whether to run tests for quotas > 2G.
1502 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1503 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1504 filecount value is greater than 2G or if a quota value is greater than 2G
1505 on a system where the size of off_t is not greater than 4, a panic error
1508 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1509 never match. The debug and -bh output now contains an explicit error
1510 message indicating a malformed IPv4 address or mask.
1512 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1513 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1514 PH/23 above applies.
1516 PH/25 Do not write to syslog when running in the test harness. The only
1517 occasion when this arises is a failure to open the main or panic logs
1518 (for which there is an explicit test).
1520 PH/26 Added the /no_tell option to "control=freeze".
1522 PH/27 If a host name lookup failed very early in a connection, for example, if
1523 the IP address matched host_lookup and the reverse lookup yielded a name
1524 that did not have a forward lookup, an error message of the form "no IP
1525 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1526 could be logged. Now it outputs the IP address instead of "NULL".
1528 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1529 allows the sender and the authenticated sender to be set when
1530 submitting a message from within Exim. Since child_open_exim() is
1531 documented for local_scan(), the new function should be too.
1533 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1534 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1535 results in an empty string is now treated as unset.
1537 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1539 PH/31 Added sender_verify_fail logging option.
1541 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1542 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1543 tidied the source and removed it altogether.
1545 PH/33 When a queue run was abandoned because the load average was too high, a
1546 log line was always written; now it is written only if the queue_run log
1547 selector is set. In addition, the log line for abandonment now contains
1548 information about the queue run such as the pid. This is always present
1549 in "start" and "stop" lines but was omitted from the "abandon" line.
1551 PH/34 Omit spaces between a header name and the colon in the error message that
1552 is given when verify = headers_syntax fails (if there are lots of them,
1553 the message gets confusing).
1555 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1556 names, as there are now some PTR records that contain slashes. This check
1557 is only to protect against broken name servers that fall over on strange
1558 characters, so the fact that it applies to all lookups doesn't matter.
1560 PH/36 Now that the new test suite is complete, we can remove some of the
1561 special code in Exim that was needed for the old test suite. For example,
1562 sorting DNS records because real resolvers return them in an arbitrary
1563 order. The new test suite's fake resolver always returns records in the
1566 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1567 bounces) except when queue_only is set, to avoid logging races between
1568 the different processes.
1570 PH/38 Panic-die if .include specifies a non-absolute path.
1572 PH/39 A tweak to the "H" retry rule from its user.
1574 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1575 a label. They prevented compilation on older perls.
1577 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1578 a warning to be raised on newish perls.
1580 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1581 on queue. Changes to match documented behaviour of showing count of
1582 messages matching specified criteria.
1584 PH/40 Changed the default ident timeout from 30s to 5s.
1586 PH/41 Added support for the use of login_cap features, on those BSD systems
1587 that have them, for controlling the resources used by pipe deliveries.
1589 PH/42 The content-scanning code uses fopen() to create files in which to put
1590 message data. Previously it was not paying any attention to the mode of
1591 the files. Exim runs with umask(0) because the rest of the code creates
1592 files with open(), and sets the required mode explicitly. Thus, these
1593 files were ending up world-writeable. This was not a big issue, because,
1594 being within the spool directory, they were not world-accessible. I have
1595 created a function called modefopen, which takes an additional mode
1596 argument. It sets umask(777), creates the file, chmods it to the required
1597 mode, then resets the umask. All the relevant calls to fopen() in the
1598 content scanning code have been changed to use this function.
1600 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1601 to 24 hours. This avoids potential overflow problems when processing G
1602 and H retry rules. I suspect nobody ever tinkers with this value.
1604 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1606 PH/45 When the plaintext authenticator is running as a client, the server's
1607 challenges are checked to ensure they are valid base64 strings. By
1608 default, the authentication attempt is cancelled if an invalid string is
1609 received. Setting client_ignore_invalid_base64 true ignores these errors.
1610 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1611 they are received. Thus, the responses can be made to depend on the
1612 challenges. If an invalid string is ignored, an empty string is placed in
1615 PH/46 Messages that are created by the autoreply transport now contains a
1616 References: header, in accordance with RFCs 2822 and 3834.
1618 PH/47 Added authenticated_sender_force to the smtp transport.
1620 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1622 PH/49 Installed latest patch from the Sieve maintainer.
1624 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1625 was also set, the appendfile transport was unnecessarily scanning a
1626 directory of message files (e.g. for maildir delivery) to find the count
1627 of files (along with the size), even though it did not need this
1628 information. It now does the scan only if it needs to find either the
1629 size of the count of files.
1631 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1633 PH/52 Two bugs concerned with error handling when the smtp transport is
1636 (i) Exim was not creating retry information for temporary errors given
1637 for individual recipients after the DATA command when the smtp transport
1638 was used in LMTP mode. This meant that they could be retried too
1639 frequently, and not timed out correctly.
1641 (ii) Exim was setting the flag that allows error details to be returned
1642 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1643 recipients that were returned after the DATA command.
1645 PH/53 This is related to PH/52, but is more general: for any failing address,
1646 when detailed error information was permitted to be returned to the
1647 sender, but the error was temporary, then after the final timeout, only
1648 "retry timeout exceeded" was returned. Now it returns the full error as
1649 well as "retry timeout exceeded".
1651 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1652 do this, and (what is worse) MTAs that accept it.
1654 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1655 will now be deprecated.
1657 PH/56 New os.c-cygwin from the Cygwin maintainer.
1659 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1660 formats (previously only available in exim formats via -bpr, -bpru,
1661 and -bpra. Now also available in native and exiqgrep formats)
1663 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1664 with very large, slow to parse queues
1666 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1668 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1670 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1671 responses to authentication challenges, though it was showing the
1672 challenges; (ii) I've removed the CR characters from the debug output for
1675 PH/58 Allow for the insertion of a newline as well as a space when a string
1676 is turned into more than one encoded-word during RFC 2047 encoding. The
1677 Sieve code now uses this.
1679 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1680 data_4xx, lost_connection, tls_required.
1682 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1683 message was being sent as an SMTP response.
1685 PH/61 Add -l and -k options to exicyclog.
1687 PH/62 When verifying, if an address was redirected to one new address, so that
1688 verification continued, and the new address failed or deferred after
1689 having set something in $address_data, the value of $address_data was not
1690 passed back to the ACL. This was different to the case when no
1691 redirection occurred. The value is now passed back in both cases.
1693 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1694 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1695 use login_cap.h, so on its own it isn't the distinguishing feature. The
1696 new name refers directly to the setclassresources() function.
1698 PH/65 Added configuration files for NetBSD3.
1700 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1702 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1703 is preferred over IPv4.
1705 PH/68 The bounce_return_message and bounce_return_body options were not being
1706 honoured for bounces generated during the reception of non-SMTP messages.
1707 In particular, this applied to messages rejected by the ACL. This bug has
1708 been fixed. However, if bounce_return_message is true and bounce_return_
1709 body is false, the headers that are returned for a non-SMTP message
1710 include only those that have been read before the error was detected.
1711 (In the case of an ACL rejection, they have all been read.)
1713 PH/69 The HTML version of the specification is now built in a directory called
1714 spec_html instead of spec.html, because the latter looks like a path with
1715 a MIME-type, and this confuses some software.
1717 PH/70 Catch two compiler warnings in sieve.c.
1719 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1720 function verify_get_ident() calls ip_connect() to connect a socket, but
1721 if the "connect()" function timed out, ip_connect() used to close the
1722 socket. However, verify_get_ident() also closes the socket later, and in
1723 between Exim writes to the log, which may get opened at this point. When
1724 the socket was closed in ip_connect(), the log could get the same file
1725 descriptor number as the socket. This naturally causes chaos. The fix is
1726 not to close the socket in ip_connect(); the socket should be closed by
1727 the function that creates it. There was only one place in the code where
1728 this was missing, in the iplookup router, which I don't think anybody now
1729 uses, but I've fixed it anyway.
1731 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1732 well as to direct DNS lookups. Otherwise the handling of names in host
1733 lists is inconsistent and therefore confusing.
1739 PH/01 Two changes to the default runtime configuration:
1741 (1) Move the checks for relay_from_hosts and authenticated clients from
1742 after to before the (commented out) DNS black list checks.
1744 (2) Add control=submission to the relay_from_hosts and authenticated
1745 clients checks, on the grounds that messages accepted by these
1746 statements are most likely to be submissions.
1748 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1750 (1) Generate an error if the third argument for the ${prvs expansion is
1753 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1756 (3) Reset the variables that are obtained from the first argument of
1757 ${prvscheck and used in the second argument before leaving the code,
1758 because their memory is reclaimed, so using them afterwards may do
1761 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1762 one (it's much easier than Tom thought :-).
1764 (5) Because of (4), we can now allow for the use of $prvscheck_result
1765 inside the third argument.
1767 PH/03 For some reason, the default setting of PATH when running a command from
1768 a pipe transport was just "/usr/bin". I have changed it to
1771 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1772 anything to be listed in the output from -bV.
1774 PH/05 When a filter generated an autoreply, the entire To: header line was
1775 quoted in the delivery log line, like this:
1777 => >A.N.Other <ano@some.domain> <original@ddress> ...
1779 This has been changed so that it extracts the operative address. There
1780 may be more than one such address. If so, they are comma-separated, like
1783 => >ano@some.domain,ona@other.domain <original@ddress> ...
1785 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1786 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1787 not being looked up in the rDNS to get a host name, Exim was showing the
1788 IP address twice in Received: lines, even though the IP addresses were
1789 identical. For example:
1791 Received: from [1.2.3.4] (helo=[1.2.3.4])
1793 However, if the real host name was known, it was omitting the HELO data
1794 if it matched the actual IP address. This has been tidied up so that it
1795 doesn't show the same IP address twice.
1797 PH/07 When both +timestamp and +memory debugging was on, the value given by
1798 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1799 called by the debug printing, thereby overwriting the timestamp buffer.
1800 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1802 PH/08 When the original message was included in an autoreply transport, it
1803 always said "this is a copy of the message, including all the headers",
1804 even if body_only or headers_only was set. It now gives an appropriate
1807 PH/09 Applied a patch from the Sieve maintainer which:
1809 o fixes some comments
1810 o adds the (disabled) notify extension core
1811 o adds some debug output for the result of if/elsif tests
1812 o points to the current vacation draft in the documentation
1813 and documents the missing references header update
1817 o fixes a bug in processing the envelope test (when testing
1818 multiple envelope elements, the last element determinted the
1821 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1822 Electronic Mail") by including:
1824 Auto-submitted: auto-generated
1826 in the messages that it generates (bounce messages and others, such as
1827 warnings). In the case of bounce messages for non-SMTP mesages, there was
1828 also a typo: it was using "Auto_submitted" (underscore instead of
1829 hyphen). Since every message generated by Exim is necessarily in response
1830 to another message, thes have all been changed to:
1832 Auto-Submitted: auto-replied
1834 in accordance with these statements in the RFC:
1836 The auto-replied keyword:
1838 - SHOULD be used on messages sent in direct response to another
1839 message by an automatic process,
1841 - MUST NOT be used on manually-generated messages,
1843 - MAY be used on Delivery Status Notifications (DSNs) and Message
1844 Disposition Notifications (MDNs),
1846 - MUST NOT be used on messages generated by automatic or periodic
1847 processes, except for messages which are automatic responses to
1850 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1851 to the default Received: header definition.
1853 PH/12 Added log selector acl_warn_skipped (default on).
1855 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1856 variables because (a) they are in the wrong storage pool and (b) even if
1857 they were copied, it wouldn't work properly because of the caching.
1859 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1860 checking when decoding. Apparently there are clients that generate
1861 overlong encoded strings. Why am I not surprised?
1863 PH/15 If the first argument of "${if match_address" was not empty, but did not
1864 contain an "@" character, Exim crashed. Now it writes a panic log message
1865 and treats the condition as false.
1867 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1869 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1870 extension "envelope-auth". The code is finished and in agreement with
1871 other implementations, but there is no documentation so far and in fact,
1872 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1873 not changing the active code.
1875 Print executed "if" and "elsif" statements when debugging is used. This
1876 helps a great deal to understand what a filter does.
1878 Document more things not specified clearly in RFC3028. I had all this
1879 sorted out, when out of a sudden new issues came to my mind. Oops."
1881 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1884 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1885 canonical form (as documented). However, after a host name lookup from
1886 the IP address, check_host() was doing a simple string comparison with
1887 addresses acquired from the DNS when checking that the found name did
1888 have the original IP as one of its addresses. Since any found IPv6
1889 addresses are likely to be in abbreviated form, the comparison could
1890 fail. Luckily, there already exists a function for doing the comparison
1891 by converting both addresses to binary, so now that is used instead of
1892 the text comparison.
1894 PH/20 There was another similar case to PH/19, when a complete host name was
1895 given in a host list; looking up its IP address could give an abbreviated
1896 form, whereas the current host's name might or might not be abbreviated.
1897 The same fix has been applied.
1903 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1904 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1907 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1908 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1910 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1912 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1913 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1914 Also, for "Auto-Submitted", treat anything other than "no" as
1915 non-personal, in accordance with RFC 3834. (Previously it treated
1916 anything starting "auto-" as non-personal.)
1918 TF/01 The control=submission/name=... option had a problem with syntax
1919 errors if the name included a slash character. The /name= option
1920 now slurps the rest of the string, so it can include any characters
1921 but it must come last in the list of options (after /sender_retain
1924 PH/05 Some modifications to the interface to the fake nameserver for the new
1932 TK/01 Added the "success_on_redirect" address verification option. See
1933 NewStuff for rationale and an example.
1935 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1937 PH/02 Patch to exigrep to allow it to work on syslog lines.
1939 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1940 fread() to skip over the body file's header line, because in Cygwin the
1941 header line is locked and is inaccessible.
1943 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1944 co-exist for some time) to make it clear that it is the Exim ID that is
1945 referenced, not the Message-ID: header line.
1947 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1948 string_format() function, because snprintf() does not exist on all
1951 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1952 ${stat: expansion item.
1954 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1955 protocol synchronization error", to keep the pedants happy.
1957 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1958 well as for IRIX systems, when gcc is being used. See the host.c source
1961 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1963 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1966 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1967 transport and to the smtp transport in LMTP mode.
1969 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1971 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1972 run a filter in a subprocess. This could lead to confusion in subsequent
1973 lookups in the parent process. There should also be a search_tidyup() at
1974 the end of the subprocess.
1976 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1977 only if the host matched helo_try_verify_hosts, which caused the
1978 verification to occur when the EHLO/HELO command was issued. The ACL just
1979 tested the remembered result. Now, if a previous verification attempt has
1980 not happened, "verify = helo" does it there and then.
1982 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1984 TK/03 Fix log output including CR from clamd.
1986 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1987 exist provoked a memory error which could cause a segfault.
1989 PH/15 Installed PCRE 6.2
1991 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1993 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1994 of the problem. Specifically, suggested +O2 rather than +O1 for the
1997 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1999 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2000 record, the port was not correctly logged when the outgoing_port log
2001 selector was set (it logged the transort's default port).
2003 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2004 fallback_hosts, and "hosts" in the smtp transport.
2006 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2007 host errors such as "Connection refused".
2009 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2010 authentication with radiusclient 0.4.9:
2012 - Error returned from rc_read_config was caught wrongly
2013 - Username/password not passed on to radius server due to wrong length.
2015 The presumption is that some radiusclient API changes for 4.51/PH/17
2016 were not taken care of correctly. The code is still untested by me (my
2017 Linux distribution still has 0.3.2 of radiusclient), but it was
2018 contributed by a Radius user.
2020 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2021 expanding the "port" option of the smtp transport.
2023 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2024 while reading a MIME header. Thanks to Tom Hughes for a patch.
2026 PH/24 Include config.h inside local_scan.h so that configuration settings are
2029 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2030 that in an ACL for RCPT (for example), you can examine exactly what was
2033 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2034 commands, but it was not correctly comparing the address with the actual
2035 client host address. Thus, it would show the EHLO address in Received:
2036 header lines when this was not necessary.
2038 PH/27 Added the % operator to ${eval:}.
2040 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2041 it should be ignoring failures (because with -C, for example, it has lost
2042 privilege). It wasn't ignoring creation failures other than "already
2045 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2048 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2049 because an input line was too long, either on its own, or by virtue of
2050 too many continuations, the temporary file was not being removed, and the
2051 return code was incorrect.
2053 PH/31 Missing "BOOL" in function definition in filtertest.c.
2055 PH/32 Applied Sieve patches from the maintainer.
2057 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2059 PH/33 Added "verify = not_blind".
2061 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2062 Local/Makefile (with some defaults set). These are used in built scripts
2063 such as exicyclog, but they have never been used in the exim_install
2064 script (though there are many overriding facilities there). I have
2065 arranged that the exim_install script now takes note of these two
2068 PH/35 Installed configuration files for Dragonfly.
2070 PH/36 When a locally submitted message by a trusted user did not contain a
2071 From: header, and the sender address was obtained from -f or from an SMTP
2072 MAIL command, and the trusted user did not use -F to supply a sender
2073 name, $originator_name was incorrectly used when constructing a From:
2074 header. Furthermore, $originator_name was used for submission mode
2075 messages from external hosts without From: headers in a similar way,
2076 which is clearly wrong.
2078 PH/37 Added control=suppress_local_fixups.
2080 PH/38 When log_selector = +received_sender was set, and the addition of the
2081 sender made the log line's construction buffer exactly full, or one byte
2082 less than full, an overflow happened when the terminating "\n" was
2085 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2086 when the result of a list match is failure because a DNS lookup failed.
2088 PH/40 RM_COMMAND is now used in the building process.
2090 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2091 the "build-* directories that it finds.
2093 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2094 address in a domain literal was a prefix of an interface address.
2096 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2097 when verifying a sender address, unless rewrite_headers is false.
2099 PH/44 Wrote a long comment about why errors_to addresses are verified as
2100 recipients, not senders.
2102 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2103 the ratelimit ACL was added.
2105 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2107 PH/46 Added extra information about PostgreSQL errors to the error string.
2109 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2110 avoiding the need to install special zones in a real server. This is
2111 backwards compatible; if it can't find the fake resolver, it drops back.
2112 Thus, both old and new test suites can be run.
2114 TF/02 Added util/ratelimit.pl
2116 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2117 clock is set back in time.
2119 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2120 Candler <B.Candler@pobox.com>.
2122 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2123 OK for addresses that are the result of redirections.
2125 PH/48 A number of further additions for the benefit of the new test suite,
2126 including a fake gethostbyname() that interfaces to the fake DNS resolver
2129 TF/06 The fix for widen_domains has also been applied to qualify_single and
2130 search_parents which are the other dnslookup options that can cause
2133 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2136 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2138 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2139 service" if it encountered an MX record with an empty target hostname.
2140 The message is now "an MX or SRV record indicated no SMTP service".
2142 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2143 if the DNS of the sending site is misconfigured. This is quite a
2144 common situation. This change restores the behaviour of treating a
2145 helo verification defer as a failure.
2147 PH/51 If self=fail was set on a router, the bounce message did not include the
2148 actual error message.
2154 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2156 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2157 command itself ended in error, the underlying message about the transport
2158 filter timeout was being overwritten with the pipe command error. Now the
2159 underlying error message should be appended to the second error message.
2161 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2163 PH/02 Reduce the amount of output that "make" produces by default. Full output
2164 can still be requested.
2166 PH/03 The warning log line about a condition test deferring for a "warn" verb
2167 was being output only once per connection, rather than after each
2168 occurrence (because it was using the same function as for successful
2169 "warn" verbs). This seems wrong, so I have changed it.
2171 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2172 it should not have, which might have caused a crash in the right
2173 circumstances, but probably never did.
2175 PH/04 Installed a modified version of Tony Finch's patch to make submission
2176 mode fix the return path as well as the Sender: header line, and to
2177 add a /name= option so that you can make the user's friendly name appear
2180 TF/03 Added the control = fakedefer ACL modifier.
2182 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2183 Mark Lowes for thorough testing.
2185 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2187 TK/03 Merged latest SRS patch from Miles Wilton.
2189 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2190 with the definition in sysexits.h (which is #included earlier).
2191 Fortunately, Exim does not actually use EX_OK. The code used to try to
2192 preserve the sysexits.h value, by assumimg that macro definitions were
2193 scanned for macro replacements. I have been disabused of this notion,
2194 so now the code just undefines EX_OK before #including unistd.h.
2196 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2197 in the smtp transport. When a block could not be written in a single
2198 write() function, the timeout was being re-applied to each part-write.
2199 This seems wrong - if the receiver was accepting one byte at a time it
2200 would take for ever. The timeout is now adjusted when this happens. It
2201 doesn't have to be particularly precise.
2203 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2204 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2206 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2207 without a domain if the check to <postmaster@domain> fails.
2209 SC/01 Eximstats: added -xls and the ability to specify output files
2210 (patch written by Frank Heydlauf).
2212 SC/02 Eximstats: use FileHandles for outputing results.
2214 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2216 SC/04 Eximstats: fixed display of large numbers with -nvr option
2218 SC/05 Eximstats: fixed merging of reports with empty tables.
2220 SC/06 Eximstats: added the -include_original_destination flag
2222 SC/07 Eximstats: removed tabs and trailing whitespace.
2224 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2226 TK/06 MBOX spool code: Add real "From " MBOX separator line
2227 so the .eml file is really in mbox format (even though
2228 most programs do not really care). Patch from Alex Miller.
2230 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2231 The latter is generated from $received_to and is only set if the
2232 message has one envelope recipient. SA can use these headers,
2233 obviously out-of-the-box. Patch from Alex Miller.
2235 PH/08 The ${def test on a variable was returning false if the variable's
2236 value was "0", contrary to what the specification has always said!
2237 The result should be true unless the variable is empty.
2239 PH/09 The syntax error of a character other than { following "${if
2240 def:variable_name" (after optional whitespace) was not being diagnosed.
2241 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2242 accidental colon was present, for example, could give incorrect results.
2244 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2245 result is used (not including appendfile, where other changes are about
2248 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2249 This involved changing a lot of size variables from int to off_t. It
2250 should work with maildirs and everything.
2252 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2253 spamd dying while we are connected to it.
2255 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2258 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2259 function for BDB 4.3.
2261 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2263 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2264 the sources for PCRE have been re-arranged and more files are now
2267 PH/15 The code I had for printing potentially long long variables in PH/11
2268 above was not the best (it lost precision). The length of off_t variables
2269 is now inspected at build time, and an appropriate printing format (%ld
2270 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2271 to be "long long int" or "long int". This is needed for the internal
2272 formatting function string_vformat().
2274 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2275 the configuration file to be ":syslog", then the script "guesses" where
2276 the logs files are, rather than using the compiled in default. In our
2277 case the guess is not the same as the compiled default, so the script
2278 suddenly stopped working when I started to use syslog. The patch checks
2279 to see if log_file_path is "". If so, it attempts to read it from exim
2280 with no configuration file to get the compiled in version, before it
2281 falls back to the previous guessing code."
2283 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2284 implementing BATV in an Exim configuration. See NewStuff for the gory
2287 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2288 Makefile that are specific to HP-UX.
2290 PH/18 If the "use_postmaster" option was set for a recipient callout together
2291 with the "random" option, the postmaster address was used as the MAIL
2292 FROM address for the random test, but not for the subsequent recipient
2293 test. It is now used for both.
2295 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2296 patch removes a few documentation additions to RFC 3028, because the
2297 latest draft now contains them. It adds the new en;ascii-case comparator
2298 and a new error check for 8bit text in MIME parts. Comparator and
2299 require names are now matched exactly. I enabled the subaddress
2300 extension, but it is not well tested yet (read: it works for me)."
2302 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2303 rework some of the code of TK/09 above to avoid the hardwired use of
2304 "%lld" and "long long". Replaced the call to snprintf() with a call to
2307 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2308 records point to non-existent hosts", "retry timeout exceeded", and
2309 "retry time not reached for any host after a long failure period".
2311 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2312 experimental DomainKeys support:
2314 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2315 (2) On an error such as an illegally used "control", the wrong name for
2316 the control was given.
2318 These problems did NOT occur unless DomainKeys support was compiled.
2320 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2322 PH/24 Added ${if match_ip condition.
2324 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2325 databases so that it will be absolutely obvious if a crash occurs in the
2326 DB library. This is a regular occurrence (often caused by mis-matched
2329 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2330 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2331 picked up on a user's system that detects such things. There doesn't seem
2332 to be a gcc warning option for this - only an attribute that has to be
2333 put on the function's prototype. It seems that in Fedora Core 4 they have
2334 set this on a number of new functions. No doubt there will be more in due
2337 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2338 specify a transport. However, if an address that was verified by such a
2339 router was the subject of a callout, Exim crashed because it tried to
2340 read the rcpt_include_affixes from the non-existent transport. Now it
2341 just assumes that the setting of that option is false. This bug was
2342 introduced by 4.51/PH/31.
2344 PH/28 Changed -d+all to exclude +memory, because that information is very
2345 rarely of interest, but it makes the output a lot bigger. People tend to
2346 do -d+all out of habit.
2348 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2349 code in os-type was giving problems when libc.so lives in lib64, like on
2352 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2353 aren't the modern standard, and it seems that some systems' include files
2354 don't always have them. Exim was already checking for some of the newer
2355 ones like T_AAAA, and defining it itself. I've added checks for all the
2356 record types that Exim uses.
2358 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2359 not automatically generating a new one, as it is supposed to. This
2360 prevented TLS from working. If the file did exist, but contained invalid
2361 data, a new version was generated, as expected. It was only the case of a
2362 non-existent file that was broken.
2364 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2365 with a change in libdomainkeys > 0.64.
2367 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2368 from DNS. If the selector record carries the flag, it now has
2369 precedence over the domain-wide flag.
2371 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2373 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2374 the use of a port name that isn't defined in /etc/services) occurred, the
2375 message was deferred as in a normal delivery, and thus remained on the
2376 spool, instead of being failed because of the mua_wrapper setting. This
2377 is now fixed, and I tidied up some of the mua_wrapper messages at the
2380 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2381 the messages in a hash of arrays rather than using individual hashes.
2382 This is a bit cleaner and results in dramatic memory savings, albeit
2383 at a slight CPU cost.
2385 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2386 as requested by Marc Sherman.
2388 SC/10 Eximstats: added histograms for user specified patterns as requested
2391 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2393 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2394 fopen() in the content-scanning modules that did not already have it.
2400 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2401 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2403 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2405 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2407 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2408 to test Sieve filters that use "vacation".
2410 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2411 that changes the way the GnuTLS parameters are stored in the cache file.
2412 The new format can be generated externally. For backward compatibility,
2413 if the data in the cache doesn't make sense, Exim assumes it has read an
2414 old-format file, and it generates new data and writes a new file. This
2415 means that you can't go back to an older release without removing the
2418 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2419 work if there are any delivery delays because "one_time" forces the
2420 parent to be marked "delivered", so its unseen clone is never tried
2421 again. For this reason, Exim now forbids the simultaneous setting of
2424 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2425 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2426 entry if you want to know the details. The fix, however, neglected to
2427 consider the case when local delivery batching is involved. The test for
2428 "previously delivered" was not happening when checking to see if an
2429 address could be batched with a previous (undelivered) one; under
2430 certain circumstances this could lead to multiple deliveries to the same
2433 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2434 in its include files, and this causes problems building Exim.
2436 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2437 header_syntax) but Exim was just ignoring anything given after a slash.
2438 In particular, this caused confusion with an attempt to use "verify =
2439 reverse_host_lookup/defer_ok". An error is now given when options are
2440 supplied for verify items that do not have them. (Maybe reverse_host_
2441 lookup should have a defer_ok option, but that's a different point.)
2443 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2444 defined by RFC 821) to 2048, because there were problems with some AUTH
2445 commands, and RFC 1869 says the size should be increased for extended
2446 SMTP commands that take arguments.
2448 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2451 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2452 "unknown" error; now it says that the functionality isn't in the binary.
2454 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2455 an address' error message when a string expansion fails (syntax or
2456 whatever). Otherwise the password may appear in the log. Following change
2457 PH/42 below, there is no longer a chance of it appearing in a bounce
2460 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2462 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2463 of its addresses was ever tried. (Bugzilla bug #2.)
2465 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2466 the result incorrectly in the debug output. (It correctly added a newline
2467 to what was transported.)
2469 TF/01 Added $received_time.
2471 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2472 commented out examples of how to interface to a virus scanner and to
2473 SpamAssassin. Also added commented examples of av_scanner and
2474 spamd_address settings.
2476 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2477 and controls are allowed in which ACLs. There were a couple of minor
2478 errors. Some of the entries in the conditions table (which is a table of
2479 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2480 negation of where the condition IS allowed.
2482 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2484 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2485 header file does not have a version number, so I've had to invent a new
2486 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2487 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2488 radiusclient), but it was contributed by a Radius user.
2490 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2491 files or directories, for OpenSSL.
2493 PH/19 When an Exim process that is running as root has to create an Exim log
2494 file, it does so in a subprocess that runs as exim:exim so as to get the
2495 ownership right at creation (otherwise, other Exim processes might see
2496 the file with the wrong ownership). There was no test for failure of this
2497 fork() call, which would lead to the process getting stuck as it waited
2498 for a non-existent subprocess. Forks do occasionally fail when resources
2499 run out. I reviewed all the other calls to fork(); they all seem to check
2502 PH/20 When checking for unexpected SMTP input at connect time (before writing
2503 the banner), Exim was not dealing correctly with a non-positive return
2504 from the read() function. If the client had disconnected by this time,
2505 the result was a log entry for a synchronization error with an empty
2506 string after "input=" when read() returned zero. If read() returned -1
2507 (an event I could not check), uninitialized data bytes were printed.
2508 There were reports of junk text (parts of files, etc) appearing after
2511 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2513 PH/22 Added support for macro redefinition, and (re)definition in between
2514 driver and ACL definitions.
2516 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2517 forgetting to use the resulting value; it was using the unexpanded value.
2519 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2520 hadn't been configured. The fix is from Juergen Kreileder, who
2521 understands it better than I do:
2523 "Here's what I see happening with three configured cyrus_sasl
2524 authenticators configured (plain, login, cram-md5):
2526 On startup auth_cyrus_sasl_init() gets called for each of these.
2527 This means three calls to sasl_listmech() without a specified mech_list.
2528 => SASL tests which mechs of all available mechs actually work
2529 => three warnings about OTP not working
2530 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2532 With the patch, sasl_listmech() also gets called three times. But now
2533 SASL's mech_list option is set to the server_mech specified in the the
2534 authenticator. Or in other words, the answer from sasl_listmech()
2535 gets limited to just the mech you're testing for (which is different
2537 => the return list contains just 'plain' or 'login', 'cram-md5' or
2538 nothing depending on the value of ob->server_mech.
2540 I've just tested the patch: Authentication still works fine,
2541 unavailable mechs specified in the exim configuration are still
2542 caught, and the auth.log warnings about OTP are gone."
2544 PH/25 When debugging is enabled, the contents of the command line are added
2545 to the debugging output, even when log_selector=+arguments is not
2548 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2549 answer is "GNU", and only if the return is "GNU/something" is the answer
2552 PH/27 $acl_verify_message is now set immediately after the failure of a
2553 verification in an ACL, and so is available in subsequent modifiers. In
2554 particular, the message can be preserved by coding like this:
2556 warn !verify = sender
2557 set acl_m0 = $acl_verify_message
2559 Previously, $acl_verify_message was set only while expanding "message"
2560 and "log_message" when a very denied access.
2562 PH/28 Modified OS/os.c-Linux with
2564 -#ifndef OS_LOAD_AVERAGE
2565 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2567 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2568 nomenclature these days.)
2570 PH/29 Installed patch from the Sieve maintainer that adds the options
2571 sieve_useraddress and sieve_subaddress to the redirect router.
2573 PH/30 In these circumstances:
2574 . Two addresses routed to the same list of hosts;
2575 . First host does not offer TLS;
2576 . First host accepts first address;
2577 . First host gives temporary error to second address;
2578 . Second host offers TLS and a TLS session is established;
2579 . Second host accepts second address.
2580 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2581 and peerdn, if requested) that were in fact used only for the second
2584 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2585 attention to any local part prefix or suffix that was matched by the
2586 router that accepted the address. It now behaves in the same way as it
2587 does for delivery: the affixes are removed from the local part unless
2588 rcpt_include_affixes is set on the transport.
2590 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2591 timeout during the DATA phase of an incoming message.
2593 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2594 applied a patch sanctioned by the Sieve maintainer.
2596 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2597 the uid or gid is negative. A case of a negative gid caused this to be
2598 noticed. The fix allows for either to be negative.
2600 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2601 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2604 PH/36 The change PH/12 above was broken. Fixed it.
2606 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2607 the grounds that routing the same address twice would always produce the
2608 same answer. This might have been true once, but it is certainly no
2609 longer true now. Routing a child address may depend on the previous
2610 routing that produced that child. Some complicated redirection strategies
2611 went wrong when messages had multiple recipients, and made Exim's
2612 behaviour dependent on the order in which the addresses were given.
2614 I have moved the duplicate checking until after the routing is complete.
2615 Exim scans the addresses that are assigned to local and remote
2616 transports, and removes any duplicates. This means that more work will be
2617 done, as duplicates will always all be routed, but duplicates are
2618 presumably rare, so I don't expect this is of any significance.
2620 For deliveries to pipes, files, and autoreplies, the duplicate checking
2621 still happens during the routing process, since they are not going to be
2624 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2625 It corrects a timeout issue with spamd. This is Ian's comment: "The
2626 background is that sometimes spamd either never reads data from a
2627 connection it has accepted, or it never writes response data. The exiscan
2628 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2629 blindly assumes that writes won't block so it may never time out."
2631 PH/39 Allow G after quota size as well as K and M.
2633 PH/40 The value set for $authenticated_id in an authenticator may not contain
2634 binary zeroes or newlines because the value is written to log lines and
2635 to spool files. There was no check on this. Now the value is run through
2636 the string_printing() function so that such characters are converted to
2637 printable escape sequences.
2639 PH/41 $message_linecount is a new variable that contains the total number of
2640 lines in the message. Compare $body_linecount, which is the count for the
2643 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2644 bounce and delay warning messages, except in certain special cases, which
2647 (a) An SMTP error message from a remote host;
2648 (b) A message specified in a :fail: redirection;
2649 (c) A message specified in a "fail" command in a system filter;
2650 (d) A message specified in a FAIL return from the queryprogram router;
2651 (e) A message specified by the cannot_route_message router option.
2653 In these cases only, Exim does include the error details in bounce and
2654 warning messages. There are also a few cases where bland messages such
2655 as "unrouteable address" or "local delivery error" are given.
2657 PH/43 $value is now also set for the "else" part of a ${run expansion.
2659 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2660 being worked on, but at least Exim now implements the latest version to
2663 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2664 process to complete was treated as a delivery failure, a timeout while
2665 writing the message to the pipe was logged, but erroneously treated as a
2666 successful delivery. Such timeouts include transport filter timeouts. For
2667 consistency with the overall process timeout, these timeouts are now
2668 treated as errors, giving rise to delivery failures by default. However,
2669 there is now a new Boolean option for the pipe transport called
2670 timeout_defer, which, if set TRUE, converts the failures into defers for
2671 both kinds of timeout. A transport filter timeout is now identified in
2674 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2675 systems where "make" and "gmake" are different, calling "gmake" at top
2676 level broke things. I've arranged for the value of $(MAKE) to be passed
2677 from the Makefile to this script so that it can call the same version of
2681 A note about Exim versions 4.44 and 4.50
2682 ----------------------------------------
2684 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2685 changes of various kinds. As a consequence, a big documentation update was
2686 needed. This delayed the release for rather longer than seemed good, especially
2687 in the light of a couple of (minor) security issues. Therefore, the changes
2688 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2689 release. So 4.44 and 4.50 are in effect two different branches that both start
2692 I have left the 4.50 change log unchanged; it contains all the changes since
2693 4.43. The change log for 4.44 is below; many of its items are identical to
2694 those for 4.50. This seems to be the most sensible way to preserve the
2695 historical information.
2701 1. Minor wording change to the doc/README.SIEVE file.
2703 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2704 computation of the current number of files was incorrect.
2706 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2707 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2710 4. Give more explanation in the error message when the command for a transport
2711 filter fails to execute.
2713 5. There are several places where Exim runs a non-Exim command in a
2714 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2715 was being done only for the command run by the queryprogram router. It is
2716 now done for all such subprocesses. The other cases are: ${run, transport
2717 filters, and the commands run by the lmtp and pipe transports.
2719 6. Added CONFIGURE_GROUP build-time option.
2721 7. Some older OS have a limit of 256 on the maximum number of file
2722 descriptors. Exim was using setrlimit() to set 1000 as a large value
2723 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2724 systems. I've change it so that if it can't get 1000, it tries for 256.
2726 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2727 was an oversight, and furthermore, ever since the addition of extra
2728 controls (e.g. 4.43/32), the checks on when to allow different forms of
2729 "control" were broken. There should now be diagnostics for all cases when a
2730 control that does not make sense is encountered.
2732 9. Added the /retain_sender option to "control=submission".
2734 10. $recipients is now available in the predata ACL (oversight).
2736 11. Tidy the search cache before the fork to do a delivery from a message
2737 received from the command line. Otherwise the child will trigger a lookup
2738 failure and thereby defer the delivery if it tries to use (for example) a
2739 cached ldap connection that the parent has called unbind on.
2741 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2742 of $address_data from the recipient verification was clobbered by the
2743 sender verification.
2745 13. The value of address_data from a sender verification is now available in
2746 $sender_address_data in subsequent conditions in the ACL statement.
2748 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2750 15. Added a new option "connect=<time>" to callout options, to set a different
2753 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2754 was its contents. (It was OK if the option was not defined at all.)
2756 17. A "Completed" log line is now written for messages that are removed from
2757 the spool by the -Mrm option.
2759 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2760 information about exactly what failed.
2762 19. Added -dd to debug only the daemon process.
2764 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2765 handles timeouts, both on the server side and network timeouts. Renamed the
2766 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2768 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2769 It is now set to "smtps".
2771 22. $host_address is now set to the target address during the checking of
2772 ignore_target_hosts.
2774 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2775 being passed; this would have caused $sender_host_name to have been used if
2776 matching the list had actually called for a host name (not very likely,
2777 since this list is usually IP addresses). A host name is now passed as
2780 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2781 code that specifies a non-restarting handler (typically sigaction() in
2782 modern systems) in an attempt to fix a rare and obscure crash bug.
2784 25. Narrowed the window for a race in the daemon that could cause it to ignore
2785 SIGCHLD signals. This is not a major problem, because they are used only to
2786 wake it up if nothing else does.
2788 26. A malformed maildirsize file could cause Exim to calculate negative values
2789 for the mailbox size or file count. Odd effects could occur as a result.
2790 The maildirsize information is now recalculated if the size or filecount
2793 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2794 support for a long time. Removed HAVE_SYS_VFS_H.
2796 28. Installed the latest version of exipick from John Jetmore.
2798 29. In an address list, if the pattern was not a regular expression, an empty
2799 subject address (from a bounce message) matched only if the pattern was an
2800 empty string. Non-empty patterns were not even tested. This was the wrong
2801 because it is perfectly reasonable to use an empty address as part of a
2802 database query. An empty address is now tested by patterns that are
2803 lookups. However, all the other forms of pattern expect the subject to
2804 contain a local part and a domain, and therefore, for them, an empty
2805 address still always fails if the pattern is not itself empty.
2807 30. Exim went into a mad DNS loop when attempting to do a callout where the
2808 host was specified on an smtp transport, and looking it up yielded more
2809 than one IP address.
2811 31. Re-factored the code for checking spool and log partition space into a
2812 function that finds that data and another that does the check. The former
2813 is then used to implement four new variables: $spool_space, $log_space,
2814 $spool_inodes, and $log_inodes.
2816 32. The RFC2047 encoding function was originally intended for short strings
2817 such as real names; it was not keeping to the 75-character limit for
2818 encoded words that the RFC imposes. It now respects the limit, and
2819 generates multiple encoded words if necessary. To be on the safe side, I
2820 have increased the buffer size for the ${rfc2047: expansion operator from
2823 33. It is now permitted to omit both strings after an "if" condition; if the
2824 condition is true, the result is "true". As before, when the second string
2825 is omitted, a false condition yields an empty string. This makes it less
2826 cumbersome to write custom ACL and router conditions.
2828 34. Failure to deliver a bounce message always caused it to be frozen, even if
2829 there was an errors_to setting on the router. The errors_to setting is now
2832 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2833 canonical form (fully expanded) before being placed in
2834 $sender_host_address.
2836 36. The table in the code that translates DNS record types into text (T_A to
2837 "A" for instance) was missing entries for NS and CNAME. It is just possible
2838 that this could have caused confusion if both these types were looked up
2839 for the same domain, because the text type is used as part of Exim's
2840 per-process caching. But the chance of anyone hitting this buglet seems
2843 37. The dnsdb lookup has been extended in a number of ways.
2845 (1) There is a new type, "zns", which walks up the domain tree until it
2846 finds some nameserver records. It should be used with care.
2848 (2) There is a new type, "mxh", which is like "mx" except that it returns
2849 just the host names, not the priorities.
2851 (3) It is now possible to give a list of domains (or IP addresses) to be
2852 looked up. The behaviour when one of the lookups defers can be
2853 controlled by a keyword.
2855 (4) It is now possible to specify the separator character for use when
2856 multiple records are returned.
2858 38. The dnslists ACL condition has been extended: it is now possible to supply
2859 a list of IP addresses and/or domains to be looked up in a particular DNS
2862 39. Added log_selector=+queue_time_overall.
2864 40. When running the queue in the test harness, wait just a tad after forking a
2865 delivery process, to get repeatability of debugging output.
2867 41. Include certificate and key file names in error message when GnuTLS fails
2868 to set them up, because the GnuTLS error message doesn't include the name
2869 of the failing file when there is a problem reading it.
2871 42. Allow both -bf and -bF in the same test run.
2873 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2875 44. The "Exiscan patch" is now merged into the mainline Exim source.
2877 45. Sometimes the final signoff response after QUIT could fail to get
2878 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2879 < 0 before doing a fflush(). This bug looks as though it goes back to the
2880 introduction of TLS in release 3.20, but "sometimes" must have been rare
2881 because the tests only now provoked it.
2883 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2884 (this can affect the format of dates).
2886 47. exim_tidydb, when checking for the continued existence of a message for
2887 which it has found a message-specific retry record, was not finding
2888 messages that were in split spool directories. Consequently, it was
2889 deleting retry records that should have stayed in existence.
2891 48. Steve fixed some bugs in eximstats.
2893 49. The SPA authentication driver was not abandoning authentication and moving
2894 on to the next authenticator when an expansion was forced to fail,
2895 contradicting the general specification for all authenticators. Instead it
2896 was generating a temporary error. It now behaves as specified.
2898 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2899 (the order specifies the preference for clients). The order is now AES256,
2900 AES128, 3DES, ARCFOUR128.
2902 51. Small patch to Sieve code - explicitly set From: when generating an
2905 52. Exim crashed if a remote delivery caused a very long error message to be
2906 recorded - for instance if somebody sent an entire SpamAssassin report back
2907 as a large number of 550 error lines. This bug was coincidentally fixed by
2908 increasing the size of one of Exim's internal buffers (big_buffer) that
2909 happened as part of the Exiscan merge. However, to be on the safe side, I
2910 have made the code more robust (and fixed the comments that describe what
2913 53. Now that there can be additional text after "Completed" in log lines (if
2914 the queue_time_overall log selector is set), a one-byte patch to exigrep
2915 was needed to allow it to recognize "Completed" as not the last thing in
2918 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2919 patch that reportedly fixes this has been added. I am not expert enough to
2920 create a test for it. This is what the patch creator wrote:
2922 "I found a little strange behaviour of ldap code when working with
2923 Windows 2003 AD Domain, where users was placed in more than one
2924 Organization Units. When I tried to give exim partial DN, the exit code
2925 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2926 But simultaneously result of request was absolutely normal ldap result,
2927 so I produce this patch..."
2929 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2930 REFERENCE, so I have modified the code to exclude the patch when that macro
2933 55. Some experimental protocols are using DNS PTR records for new purposes. The
2934 keys for these records are domain names, not reversed IP addresses. The
2935 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2936 leaves it alone. Component reversal etc. now happens only for IP addresses.
2939 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2941 57. Double the size of the debug message buffer (to 2048) so that more of very
2942 long debug lines gets shown.
2944 58. The exicyclog utility now does better if the number of log files to keep
2945 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2947 59. Two changes related to the smtp_active_hostname option:
2949 (1) $smtp_active_hostname is now available as a variable.
2950 (2) The default for smtp_banner uses $smtp_active_hostname instead
2951 of $primary_hostname.
2953 60. The host_aton() function is supposed to be passed a string that is known
2954 to be a valid IP address. However, in the case of IPv6 addresses, it was
2955 not checking this. This is a hostage to fortune. Exim now panics and dies
2956 if the condition is not met. A case was found where this could be provoked
2957 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2958 components; fortuitously, this particular loophole had already been fixed
2959 by change 4.50/55 above.
2961 If there are any other similar loopholes, the new check in host_aton()
2962 itself should stop them being exploited. The report I received stated that
2963 data on the command line could provoke the exploit when Exim was running as
2964 exim, but did not say which command line option was involved. All I could
2965 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2966 running as the user.
2969 61. There was a buffer overflow vulnerability in the SPA authentication code
2970 (which came originally from the Samba project). I have added a test to the
2971 spa_base64_to_bits() function which I hope fixes it.
2974 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2975 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2977 63. The daemon start-up calls getloadavg() while still root for those OS that
2978 need the first call to be done as root, but it missed one case: when
2979 deliver_queue_load_max is set with deliver_drop_privilege. This is
2980 necessary for the benefit of the queue runner, because there is no re-exec
2981 when deliver_drop_privilege is set.
2983 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2984 This has been fixed.
2986 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2987 was in use, was not putting the data itself into the right store pool;
2988 consequently, it could be overwritten for a subsequent message in the same
2989 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2992 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2994 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2995 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2996 the function were treating the return as a boolean value, which happened to
2997 work because 0=false and not-0=true, but is not correct code.
2999 68. The host_aton() function was not handling scoped IPv6 addresses (those
3000 with, for example, "%eth0" on the end) correctly.
3002 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3003 negated items (that is, ~something) in unsigned ints. Some compilers
3004 apparently mutter when there is no cast.
3006 70. If an address verification called from an ACL failed, and did not produce a
3007 user-specific message (i.e. there was only a "system" message), nothing was
3008 put in $acl_verify_message. In this situation, it now puts the system
3011 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3012 session; change 4.31/43 added the unwanted input to the log line - except
3013 that it did not do this in the start of session case. It now does.
3015 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3016 This is wrong and can cause the other end to generate a synchronization
3017 error if it is another Exim or anything else that does the synchronization
3018 check. A QUIT command is no longer sent after a timeout.
3020 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3021 during host lookups.
3023 74. The defer_ok option of callout verification was not working if it was used
3024 when verifying addresses in header lines, that is, for this case:
3026 verify = header_sender/callout=defer_ok
3028 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3029 those file descriptors could be used for SMTP connections. If anything
3030 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3031 could be sent to the SMTP client, causing chaos. The daemon now opens
3032 stdin, stdout, and stderr to /dev/null when it puts itself into the
3035 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3036 log by default. The user can override this with suitable Perl magic.
3038 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3039 the log message when discard triggers, was not working for the DATA ACL or
3040 for the non-SMTP ACL.
3042 78. Error message wording change in sieve.c.
3044 79. If smtp_accept_max_per_host was set, the number of connections could be
3045 restricted to fewer than expected, because the daemon was trying to set up
3046 a new connection before checking whether the processes handling previous
3047 connections had finished. The check for completed processes is now done
3048 earlier. On busy systems, this bug wouldn't be noticed because something
3049 else would have woken the daemon, and it would have reaped the completed
3052 80. If a message was submitted locally by a user whose login name contained one
3053 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3054 It caused a spool format error. I have fixed the spool reading code. A
3055 related problem was that the "from" clause in the Received: line became
3056 illegal because of the space(s). It is now covered by ${quote_local_part.
3058 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3061 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3063 83. Patch from Sieve maintainer to fix unterminated string problem in
3064 "vacation" handling.
3066 84. Some minor changes to the Linux configuration files to help with other
3067 OS variants using glibc.
3069 85. One more patch for Sieve to update vacation handling to latest spec.
3072 ----------------------------------------------------
3073 See the note above about the 4.44 and 4.50 releases.
3074 ----------------------------------------------------
3080 1. Change 4.43/35 introduced a bug that caused file counts to be
3081 incorrectly computed when quota_filecount was set in an appendfile
3084 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3085 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3088 3. Give more explanation in the error message when the command for a transport
3089 filter fails to execute.
3091 4. There are several places where Exim runs a non-Exim command in a
3092 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3093 was being done only for the command run by the queryprogram router. It is
3094 now done for all such subprocesses. The other cases are: ${run, transport
3095 filters, and the commands run by the lmtp and pipe transports.
3097 5. Some older OS have a limit of 256 on the maximum number of file
3098 descriptors. Exim was using setrlimit() to set 1000 as a large value
3099 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3100 systems. I've change it so that if it can't get 1000, it tries for 256.
3102 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3103 was an oversight, and furthermore, ever since the addition of extra
3104 controls (e.g. 4.43/32), the checks on when to allow different forms of
3105 "control" were broken. There should now be diagnostics for all cases when a
3106 control that does not make sense is encountered.
3108 7. $recipients is now available in the predata ACL (oversight).
3110 8. Tidy the search cache before the fork to do a delivery from a message
3111 received from the command line. Otherwise the child will trigger a lookup
3112 failure and thereby defer the delivery if it tries to use (for example) a
3113 cached ldap connection that the parent has called unbind on.
3115 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3116 of $address_data from the recipient verification was clobbered by the
3117 sender verification.
3119 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3120 was its contents. (It was OK if the option was not defined at all.)
3122 11. A "Completed" log line is now written for messages that are removed from
3123 the spool by the -Mrm option.
3125 12. $host_address is now set to the target address during the checking of
3126 ignore_target_hosts.
3128 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3129 being passed; this would have caused $sender_host_name to have been used if
3130 matching the list had actually called for a host name (not very likely,
3131 since this list is usually IP addresses). A host name is now passed as
3134 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3135 code that specifies a non-restarting handler (typically sigaction() in
3136 modern systems) in an attempt to fix a rare and obscure crash bug.
3138 15. Narrowed the window for a race in the daemon that could cause it to ignore
3139 SIGCHLD signals. This is not a major problem, because they are used only to
3140 wake it up if nothing else does.
3142 16. A malformed maildirsize file could cause Exim to calculate negative values
3143 for the mailbox size or file count. Odd effects could occur as a result.
3144 The maildirsize information is now recalculated if the size or filecount
3147 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3148 support for a long time. Removed HAVE_SYS_VFS_H.
3150 18. Updated exipick to current release from John Jetmore.
3152 19. Allow an empty sender to be matched against a lookup in an address list.
3153 Previously the only cases considered were a regular expression, or an
3156 20. Exim went into a mad DNS lookup loop when doing a callout where the
3157 host was specified on the transport, if the DNS lookup yielded more than
3160 21. The RFC2047 encoding function was originally intended for short strings
3161 such as real names; it was not keeping to the 75-character limit for
3162 encoded words that the RFC imposes. It now respects the limit, and
3163 generates multiple encoded words if necessary. To be on the safe side, I
3164 have increased the buffer size for the ${rfc2047: expansion operator from
3167 22. Failure to deliver a bounce message always caused it to be frozen, even if
3168 there was an errors_to setting on the router. The errors_to setting is now
3171 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3172 canonical form (fully expanded) before being placed in
3173 $sender_host_address.
3175 24. Updated eximstats to version 1.33
3177 25. Include certificate and key file names in error message when GnuTLS fails
3178 to set them up, because the GnuTLS error message doesn't include the name
3179 of the failing file when there is a problem reading it.
3181 26. Expand error message when OpenSSL has problems setting up cert/key files.
3184 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3185 (this can affect the format of dates).
3187 28. exim_tidydb, when checking for the continued existence of a message for
3188 which it has found a message-specific retry record, was not finding
3189 messages that were in split spool directories. Consequently, it was
3190 deleting retry records that should have stayed in existence.
3192 29. eximstats updated to version 1.35
3193 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3194 1.35 - bugfix such that pie charts by volume are generated correctly
3196 30. The SPA authentication driver was not abandoning authentication and moving
3197 on to the next authenticator when an expansion was forced to fail,
3198 contradicting the general specification for all authenticators. Instead it
3199 was generating a temporary error. It now behaves as specified.
3201 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3202 (the order specifies the preference for clients). The order is now AES256,
3203 AES128, 3DES, ARCFOUR128.
3205 31. Small patch to Sieve code - explicitly set From: when generating an
3208 32. Exim crashed if a remote delivery caused a very long error message to be
3209 recorded - for instance if somebody sent an entire SpamAssassin report back
3210 as a large number of 550 error lines. This bug was coincidentally fixed by
3211 increasing the size of one of Exim's internal buffers (big_buffer) that
3212 happened as part of the Exiscan merge. However, to be on the safe side, I
3213 have made the code more robust (and fixed the comments that describe what
3216 33. Some experimental protocols are using DNS PTR records for new purposes. The
3217 keys for these records are domain names, not reversed IP addresses. The
3218 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3219 leaves it alone. Component reversal etc. now happens only for IP addresses.
3222 34. The host_aton() function is supposed to be passed a string that is known
3223 to be a valid IP address. However, in the case of IPv6 addresses, it was
3224 not checking this. This is a hostage to fortune. Exim now panics and dies
3225 if the condition is not met. A case was found where this could be provoked
3226 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3227 components; fortuitously, this particular loophole had already been fixed
3228 by change 4.50/55 or 4.44/33 above.
3230 If there are any other similar loopholes, the new check in host_aton()
3231 itself should stop them being exploited. The report I received stated that
3232 data on the command line could provoke the exploit when Exim was running as
3233 exim, but did not say which command line option was involved. All I could
3234 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3235 running as the user.
3238 35. There was a buffer overflow vulnerability in the SPA authentication code
3239 (which came originally from the Samba project). I have added a test to the
3240 spa_base64_to_bits() function which I hope fixes it.
3243 36. The daemon start-up calls getloadavg() while still root for those OS that
3244 need the first call to be done as root, but it missed one case: when
3245 deliver_queue_load_max is set with deliver_drop_privilege. This is
3246 necessary for the benefit of the queue runner, because there is no re-exec
3247 when deliver_drop_privilege is set.
3249 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3250 was in use, was not putting the data itself into the right store pool;
3251 consequently, it could be overwritten for a subsequent message in the same
3252 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3255 38. Sometimes the final signoff response after QUIT could fail to get
3256 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3257 < 0 before doing a fflush(). This bug looks as though it goes back to the
3258 introduction of TLS in release 3.20, but "sometimes" must have been rare
3259 because the tests only now provoked it.
3265 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3266 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3267 Now it returns an integer. A number of calls were still expecting a T/F
3268 return. Fortuitously, in all cases, the tests worked in OK situations,
3269 which is the norm. However, things would have gone wrong on any write
3270 failures on the smtp file descriptor. This function is used when sending
3271 messages over SMTP and also when doing verify callouts.
3273 2. When Exim is called to do synchronous delivery of a locally submitted
3274 message (the -odf or -odi options), it no longer closes stderr before doing
3277 3. Implemented the mua_wrapper option.
3279 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3281 5. Implemented the functions header_remove(), header_testname(),
3282 header_add_at_position(), and receive_remove_recipient(), and exported them
3285 6. If an ACL "warn" statement specified the addition of headers, Exim already
3286 inserted X-ACL-Warn: at the start if there was no header name. However, it
3287 was not making this test for the second and subsequent header lines if
3288 there were newlines in the string. This meant that an invalid header could
3289 be inserted if Exim was badly configured.
3291 7. Allow an ACL "warn" statement to add header lines at the start or after all
3292 the Received: headers, as well as at the end.
3294 8. Added the rcpt_4xx retry error code.
3296 9. Added postmaster_mailfrom=xxx to callout verification option.
3298 10. Added mailfrom=xxxx to the callout verification option, for verify=
3301 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3302 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3304 12. Inserted some casts to stop certain compilers warning when using pointer
3305 differences as field lengths or precisions in printf-type calls (mostly
3306 affecting debugging statements).
3308 13. Added optional readline() support for -be (dynamically loaded).
3310 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3311 same clock tick as a message's arrival, so that its received time was the
3312 same as the "first fail" time on the retry record, and that message
3313 remained on the queue past the ultimate address timeout, every queue runner
3314 would try a delivery (because it was past the ultimate address timeout) but
3315 after another failure, the ultimate address timeout, which should have then
3316 bounced the address, did not kick in. This was a "< instead of <=" error;
3317 in most cases the first failure would have been in the next clock tick
3318 after the received time, and all would be well.
3320 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3321 being recognized when the domain list was tested by the match_domain
3322 condition in an expansion string.
3324 16. Added the ${str2b64: operator.
3326 17. Exim was always calling setrlimit() to set a large limit for the number of
3327 processes, without checking whether the existing limit was already
3328 adequate. (It did check for the limit on file descriptors.) Furthermore,
3329 errors from getrlimit() and setrlimit() were being ignored. Now they are
3330 logged to the main and panic logs, but Exim does carry on, to try to do its
3331 job under whatever limits there are.
3333 18. Imported PCRE 5.0.
3335 19. Trivial typo in log message " temporarily refused connection" (the leading
3338 20. If the log selector return_path_on_delivery was set and an address was
3339 redirected to /dev/null, the delivery process crashed because it assumed
3340 that a return path would always be set for a "successful" delivery. In this
3341 case, the whole delivery is bypassed as an optimization, and therefore no
3344 21. Internal re-arrangement: the function for sending a challenge and reading
3345 a response while authentication was assuming a zero-terminated challenge
3346 string. It's now changed to take a pointer and a length, to allow for
3347 binary data in such strings.
3349 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3351 23. Exim was not respecting finduser_retries when seeking the login of the
3352 uid under which it was called; it was always trying 10 times. (The default
3353 setting of finduser_retries is zero.) Also, it was sleeping after the final
3354 failure, which is pointless.
3356 24. Implemented tls_on_connect_ports.
3358 25. Implemented acl_smtp_predata.
3360 26. If the domain in control=submission is set empty, Exim assumes that the
3361 authenticated id is a complete email address when it generates From: or
3362 Sender: header lines.
3364 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3365 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3366 chown and chgrp in /bin and hostname in /usr/bin.
3368 28. Exim was keeping the "process log" file open after each use, just as it
3369 does for the main log. This opens the possibility of it remaining open for
3370 long periods when the USR1 signal hits a daemon. Occasional processlog
3371 errors were reported, that could have been caused by this. Anyway, it seems
3372 much more sensible not to leave this file open at all, so that is what now
3375 29. The long-running daemon process does not normally write to the log once it
3376 has entered its main loop, and it closes the log before doing so. This is
3377 so that log files can straightforwardly be renamed and moved. However,
3378 there are a couple of unusual error situations where the daemon does write
3379 log entries, and I had neglected to close the log afterwards.
3381 30. The text of an SMTP error response that was received during a remote
3382 delivery was being truncated at 512 bytes. This is too short for some of
3383 the long messages that one sometimes sees. I've increased the limit to
3386 31. It is now possible to make retry rules that apply only when a message has a
3387 specific sender, in particular, an empty sender.
3389 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3390 it possible to be selective about when SMTP synchronization is enforced.
3392 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3394 32. Implemented hosts_connection_nolog.
3396 33. Added an ACL for QUIT.
3398 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3401 35. Added mailbox_size and mailbox_filecount to appendfile.
3403 36. Added control = no_multiline_responses to ACLs.
3405 37. There was a bug in the logic of the code that waits for the clock to tick
3406 in the case where the clock went backwards by a substantial amount such
3407 that the microsecond fraction of "now" was more than the microsecond
3408 fraction of "then" (but the whole seconds number was less).
3410 38. Added support for the libradius Radius client library this is found on
3411 FreeBSD (previously only the radiusclient library was supported).
3417 1. When certain lookups returned multiple values in the form name=value, the
3418 quoting of the values was not always being done properly. Specifically:
3419 (a) If the value started with a double quote, but contained no whitespace,
3421 (b) If the value contained whitespace other than a space character (i.e.
3422 tabs or newlines or carriage returns) it was not quoted.
3423 This fix has been applied to the mysql and pgsql lookups by writing a
3424 separate quoting function and calling it from the lookup code. The fix
3425 should probably also be applied to nisplus, ibase and oracle lookups, but
3426 since I cannot test any of those, I have not disturbed their existing code.
3428 2. A hit in the callout cache for a specific address caused a log line with no
3429 reason for rejecting RCPT. Now it says "Previous (cached) callout
3430 verification failure".
3432 3. There was an off-by-one bug in the queryprogram router. An over-long
3433 return line was truncated at 256 instead of 255 characters, thereby
3434 overflowing its buffer with the terminating zero. As well as fixing this, I
3435 have increased the buffer size to 1024 (and made a note to document this).
3437 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3438 when Exim is waiting for an SMTP response from a remote server, Exim
3439 restarts its select() call on the socket, thereby resetting its timeout.
3440 This is not a problem when such interrupts are rare. Somebody set up a cron
3441 job to run exiwhat every 2 minutes, which is less than the normal select()
3442 timeout (5 or 10 minutes). This meant that the select() timeout never
3443 kicked in because it was always reset. I have fixed this by comparing the
3444 time when an interrupt arrives with the time at the start of the first call
3445 to select(). If more time than the timeout has elapsed, the interrupt is
3446 treated as a timeout.
3448 5. Some internal re-factoring in preparation for the addition of Sieve
3449 extensions (by MH). In particular, the "personal" test is moved to a
3450 separate function, and given an option for scanning Cc: and Bcc: (which is
3451 not set for Exim filters).
3453 6. When Exim created an email address using the login of the caller as the
3454 local part (e.g. when creating a From: or Sender: header line), it was not
3455 quoting the local part when it contained special characters such as @.
3457 7. Installed new OpenBSD configuration files.
3459 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3460 try to make them clearer.
3462 9. Callout options, other than the timeout value, were being ignored when
3463 verifying sender addresses in header lines. For example, when using
3465 verify = header_sender/callout=no_cache
3467 the cache was (incorrectly) being used.
3469 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3470 only the Cygwin environment.
3472 11. When return_path_on_delivery was set as a log selector, if different remote
3473 addresses in the same message used different return paths and parallel
3474 remote delivery occurred, the wrong values would sometimes be logged.
3475 (Whenever a remote delivery process finished, the return path value from
3476 the most recently started remote delivery process was logged.)
3478 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3479 lines when AUTH and/or TLS are in use. This is the "received protocol"
3480 field. Exim used to use "asmtp" for authenticated SMTP, without any
3481 indication (in the protocol name) for TLS use. Now it follows the RFC and
3482 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3483 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3484 names appear in log lines as well as in Received: header lines.
3486 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3487 extensions, and comparison tests, and to fix some bugs.
3489 14. Changes to the "personal" filter test:
3491 (1) The test was buggy in that it was just doing the equivalent of
3492 "contains" tests on header lines. For example, if a user's address was
3493 anne@some.where, the "personal" test would incorrectly be true for
3495 To: susanne@some.where
3497 This test is now done by extracting each address from the header in turn,
3498 and checking the entire address. Other tests that are part of "personal"
3499 are now done using regular expressions (for example, to check local parts
3500 of addresses in From: header lines).
3502 (2) The list of non-personal local parts in From: addresses has been
3503 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3504 taken from the Sieve specification recommendations.
3506 (3) If the message contains any header line starting with "List-" it is
3507 treated as non-personal.
3509 (4) The test for "circular" in the Subject: header line has been removed
3510 because it now seems ill-conceived.
3512 15. Minor typos in src/EDITME comments corrected.
3514 16. Installed latest exipick from John Jetmore.
3516 17. If headers_add on a router specified a text string that was too long for
3517 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3518 of string_sprintf() is now avoided.
3520 18. $message_body_size was not set (it was always zero) when running the DATA
3521 ACL and the local_scan() function.
3523 19. For the "mail" command in an Exim filter, no default was being set for
3524 the once_repeat time, causing a random time value to be used if "once" was
3525 specified. (If the value happened to be <= 0, no repeat happened.) The
3526 default is now 0s, meaning "never repeat". The "vacation" command was OK
3527 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3528 (I found it when inspecting the code).
3530 20. There is now an overall timeout for performing a callout verification. It
3531 defaults to 4 times the callout timeout, which applies to individual SMTP
3532 commands during the callout. The overall timeout applies when there is more
3533 than one host that can be tried. The timeout is checked before trying the
3534 next host. This prevents very long delays if there are a large number of
3535 hosts and all are timing out (e.g. when the network connections are timing
3536 out). The value of the overall timeout can be changed by specifying an
3537 additional sub-option for "callout", called "maxwait". For example:
3539 verify = sender/callout=5s,maxwait=20s
3541 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3542 to the end before writing, but this should make it even safer).
3544 22. Exim was forgetting that it had advertised PIPELINING for the second and
3545 subsequent messages on an SMTP connection. It was also not resetting its
3546 memory on STARTTLS and an internal HELO.
3548 23. When Exim logs an SMTP synchronization error within a session, it now
3549 records whether PIPELINING has been advertised or not.
3551 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3552 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3553 rather than long int.
3555 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3557 26. Added the never_mail option to autoreply.
3563 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3564 crash if the getsockname() call failed; this can happen if a connection is
3565 closed very soon after it is established. The problem was simply in the
3566 order in which certain operations were done, causing Exim to try to write
3567 to the SMTP stream before it had set up the file descriptor. The bug has
3568 been fixed by making things happen in the correct order.
3574 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3575 before the connection was closed, thus losing the rejection response.
3577 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3578 some early Solaris releases, but causes trouble in current releases where
3579 socklen_t is defined.
3581 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3584 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3587 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3588 that releasing the top of it at the end releases what was used for sub-
3589 expansions (unless the block got too big). However, discard this block if
3590 the first thing is a variable or header, so that we can use its block when
3591 it is dynamic (useful for very large $message_headers, for example).
3593 6. Lookups now cache *every* query, not just the most recent. A new, separate
3594 store pool is used for this. It can be recovered when all lookup caches are
3595 flushed. Lookups now release memory at the end of their result strings.
3596 This has involved some general refactoring of the lookup sources.
3598 7. Some code has been added to the store_xxx() functions to reduce the amount
3599 of flapping under certain conditions.
3601 8. log_incoming_interface used to affect only the <= reception log lines. Now
3602 it causes the local interface and port to be added to several more SMTP log
3603 lines, for example "SMTP connection from", and rejection lines.
3605 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3607 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3609 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3610 could be overwritten at the end of the current message (or the start of a
3611 new message if it was set in a HELO ACL). The value is now preserved for
3612 the duration of the SMTP connection.
3614 12. If a transport had a headers_rewrite setting, and a matching header line
3615 contained an unqualified address, that address was qualified, even if it
3616 did not match any rewriting rules. The underlying bug was that the values
3617 of the flags that permit the existence of unqualified sender and recipient
3618 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3619 non-local messages, and by -bnq for local messages) were not being
3620 preserved with the message after it was received.
3622 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3623 "next input=" as part of the text comprising the host identity instead of
3624 the correct text. The code was using the same buffer for two different
3625 strings. However, depending on which order the printing function evaluated
3626 its arguments, the bug did not always show up. Under Linux, for example, my
3627 test suite worked just fine.
3629 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3630 doesn't work with some older versions of Perl. It has been changed to "my",
3631 which in any case is probably the better facility to use.
3633 15. A really picky compiler found some instances of statements for creating
3634 error messages that either had too many or two few arguments for the format
3637 16. The size of the buffer for calls to the DNS resolver has been increased
3638 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3639 for addresses that have a lot of PTR records. This alleviates a problem; it
3640 does not fully solve it.
3642 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3643 buffer now truncates the list and logs the incident, which is the same
3644 action as happens when Exim is looking up a host name and its aliases.
3645 Previously in this situation something unpredictable would happen;
3646 sometimes it was "internal error: store_reset failed".
3648 18. If a server dropped the connection unexpectedly when an Exim client was
3649 using GnuTLS and trying to read a response, the client delivery process
3650 crashed while trying to generate an error log message.
3652 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3653 string, for example:
3655 warn message = H1: something\nH2: something
3657 the text was added as a single header line from Exim's point of view
3658 though it ended up OK in the delivered message. However, searching for the
3659 second and subsequent header lines using $h_h2: did not work. This has been
3660 fixed. Similarly, if a system filter added multiple headers in this way,
3661 the routers could not see them.
3663 20. Expanded the error message when iplsearch is called with an invalid key to
3664 suggest using net-iplsearch in a host list.
3666 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3667 ACLs are no longer actually imposed (and a message to that effect is
3670 22. If a "gecos" field in a passwd entry contained escaped characters, in
3671 particular, if it contained a \" sequence, Exim got it wrong when building
3672 a From: or a Sender: header from that name. A second bug also caused
3673 incorrect handling when an unquoted " was present following a character
3674 that needed quoting.
3676 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3677 was not being matched caselessly.
3679 24. Arranged for all hyphens in the exim.8 source to be escaped with
3682 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3683 properly. Recipient callout cache records were still being keyed to include
3684 the sender, even when use_sender was set false. This led to far more
3685 callouts that were necessary. The sender is no longer included in the key
3686 when use_sender is false.
3688 26. Added "control = submission" modifier to ACLs.
3690 27. Added the ${base62d: operator to decode base 62 numbers.
3692 28. dnsdb lookups can now access SRV records.
3694 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3695 the configuration file.
3697 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3698 (-v) mode. This makes the output for a verbose queue run more intelligible.
3700 31. Added a use_postmaster feature to recipient callouts.
3702 32. Added the $body_zerocount variable, containing the number of binary zero
3703 bytes in the message body.
3705 33. The time of last modification of the "new" subdirectory is now used as the
3706 "mailbox time last read" when there is a quota error for a maildir
3709 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3711 35. Added +ignore_unknown as a special item in host lists.
3713 36. Code for decoding IPv6 addresses in host lists is now included, even if
3714 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3715 address was recognized as an IP address, but was then not correctly decoded
3716 into binary, causing unexpected and incorrect effects when compared with
3723 1. Very minor rewording of debugging text in manualroute to say "list of
3724 hosts" instead of "hostlist".
3726 2. If verify=header_syntax was set, and a header line with an unqualified
3727 address (no domain) and a large number of spaces between the end of the
3728 name and the colon was received, the reception process suffered a buffer
3729 overflow, and (when I tested it) crashed. This was caused by some obsolete
3730 code that should have been removed. The fix is to remove it!
3732 3. When running in the test harness, delay a bit after writing a bounce
3733 message to get a bit more predictability in the log output.
3735 4. Added a call to search_tidyup() just before forking a reception process. In
3736 theory, someone could use a lookup in the expansion of smtp_accept_max_
3737 per_host which, without the tidyup, could leave open a database connection.
3739 5. Added the variables $recipient_data and $sender_data which get set from a
3740 lookup success in an ACL "recipients" or "senders" condition, or a router
3741 "senders" option, similar to $domain_data and $local_part_data.
3743 6. Moved the writing of debug_print from before to after the "senders" test
3746 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3747 problems for message scanning, either using a data ACL, or using
3748 local_scan() because the Received: header was not generated till after they
3749 were called (in order to set the time as the time of reception completion).
3750 I have revised the way this works. The header is now generated after the
3751 body is received, but before the ACL or local_scan() are called. After they
3752 are run, the timestamp in the header is updated.
3758 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3759 before starting a queue runner without re-exec. This happened only when
3760 deliver_drop_privilege was set or when the Exim user was set to root. The
3761 effect of the bug was that timeouts during subsequent deliveries caused
3762 crashes instead of being properly handled. The handler is now left at its
3763 default (and expected) setting.
3765 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3766 message, again when deliver_drop_privilege is set or Exim is run as root.
3767 The bug described in (1) was not present in this case, but the tidying up
3768 of the other signals was missing. I have made the two cases consistent.
3770 3. The ignore_target_hosts setting on a manualroute router was being ignored
3771 for hosts that were looked up using the /MX notation.
3773 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3776 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3777 operated on the sender address. After changing the $sender_address to <>
3778 for the sender address verify, Exim was re-instated it as the original
3779 (before rewriting) address, but remembering that it had rewritten it, so it
3780 wasn't rewriting it again. This bug also had the effect of breaking the
3781 sender address verification caching when the sender address was rewritten.
3783 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3784 This has been changed so that if the ip literal address matches
3785 ignore_target_hosts, the router declines.
3787 7. Added expansion conditions match_domain, match_address, and match_local_
3788 part (NOT match_host).
3790 8. The placeholder for the Received: header didn't have a length field set.
3792 9. Added code to Exim itself and to exim_lock to test for a specific race
3793 condition that could lead to file corruption when using MBX delivery. The
3794 issue is with the lockfile that is created in /tmp. If this file is removed
3795 after a process has opened it but before that process has acquired a lock,
3796 there is the potential for a second process to recreate the file and also
3797 acquire a lock. This could lead to two Exim processes writing to the file
3798 at the same time. The added code performs the same test as UW imapd; it
3799 checks after acquiring the lock that its file descriptor still refers to
3800 the same named file.
3802 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3803 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3806 11. Added the smtp_active_hostname option. If used, this will typically be made
3807 to depend on the incoming interface address. Because $interface_address is
3808 not set up until the daemon has forked a reception process, error responses
3809 that can happen earlier (such as "too many connections") no longer contain
3812 12. If an expansion in a condition on a "warn" statement fails because a lookup
3813 defers, the "warn" statement is abandoned, and the next ACL statement is
3814 processed. Previously this caused the whole ACL to be aborted.
3816 13. Added the iplsearch lookup type.
3818 14. Added ident_timeout as a log selector.
3820 15. Added tls_certificate_verified as a log selector.
3822 16. Added a global option tls_require_ciphers (compare the smtp transport
3823 option of the same name). This controls incoming TLS connections.
3825 17. I finally figured out how to make tls_require_ciphers do a similar thing
3826 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3827 before starting the TLS session.
3829 18. Tabs are now shown as \t in -bP output.
3831 19. If the log selector return_path_on_delivery was set, Exim crashed when
3832 bouncing a message because it had too many Received: header lines.
3834 20. If two routers both had headers_remove settings, and the first one included
3835 a superfluous trailing colon, the final name in the first list and the
3836 first name in the second list were incorrectly joined into one item (with a
3837 colon in the middle).
3843 1. Added -C and -D options to the exinext utility, mainly to make it easier
3844 to include in the automated testing, but these could be helpful when
3845 multiple configurations are in use.
3847 2. The exinext utility was not formatting the output nicely when there was
3848 an alternate port involved in the retry record key, nor when there was a
3849 message id as well (for retries that were specific to a specific message
3850 and a specific host). It was also confused by IPv6 addresses, because of
3851 the additional colons they contain. I have fixed the IPv4 problem, and
3852 patched it up to do a reasonable job for IPv6.
3854 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3855 delivery, the log line now contains "pipelined" if PIPELINING was used.
3857 4. An SMTP transport process used to panic and die if the bind() call to set
3858 an explicit outgoing interface failed. This has been changed; it is now
3859 treated in the same way as a connect() failure.
3861 5. A reference to $sender_host_name in the part of a conditional expansion
3862 that was being skipped was still causing a DNS lookup. This no longer
3865 6. The def: expansion condition was not recognizing references to header lines
3866 that used bh_ and bheader_.
3868 7. Added the _cache feature to named lists.
3870 8. The code for checking quota_filecount in the appendfile transport was
3871 allowing one more file than it should have been.
3873 9. For compatibility with Sendmail, the command line option
3881 and sets the incoming protocol and host name (for trusted callers). The
3882 host name and its colon can be omitted when only the protocol is to be set.
3883 Note the Exim already has two private options, -pd and -ps, that refer to
3884 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3885 "s", but I don't think that's a major issue.
3887 10. A number of refactoring changes to the code, none of which should affect
3890 (a) The number of logging options was getting close to filling up the
3891 32-bit word that was used as a bit map. I have split them into two classes:
3892 those that are passed in the argument to log_write(), and those that are
3893 only ever tested independently outside of that function. These are now in
3894 separate 32-bit words, so there is plenty of room for expansion again.
3895 There is no change in the user interface or the logging behaviour.
3897 (b) When building, for example, log lines, the code previously used a
3898 macro that called string_cat() twice, in order to add two strings. This is
3899 not really sufficiently general. Furthermore, there was one instance where
3900 it was actually wrong because one of the argument was used twice, and in
3901 one call a function was used. (As it happened, calling the function twice
3902 did not affect the overall behaviour.) The macro has been replaced by a
3903 function that can join an arbitrary number of extra strings onto a growing
3906 (c) The code for expansion conditions now uses a table and a binary chop
3907 instead of a serial search (which was left over from when there were very
3908 few conditions). Also, it now recognizes conditions like "pam" even when
3909 the relevant support is not compiled in: a suitably worded error message is
3910 given if an attempt is made to use such a condition.
3912 11. Added ${time_interval:xxxxx}.
3914 12. A bug was causing one of the ddress fields not to be passed back correctly
3915 from remote delivery subprocesses. The field in question was not being
3916 subsequently used, so this caused to problems in practice.
3918 13. Added new log selectors queue_time and deliver_time.
3920 14. Might have fixed a bug in maildirsizefile handling that threw up
3921 "unexpected character" debug warnings, and recalculated the data
3922 unnecessarily. In any case, I expanded the warning message to give more
3925 15. Added the message "Restricted characters in address" to the statements in
3926 the default ACL that block characters like @ and % in local parts.
3928 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3929 Three changes have been made:
3931 (a) There was a serious bug; a negative response to MAIL caused the whole
3932 recipient domain to be cached as invalid, thereby blocking all messages
3933 to all local parts at the same domain, from all senders. This bug has
3934 been fixed. The domain is no longer cached after a negative response to
3935 MAIL if the sender used is not empty.
3937 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3940 (c) A new callout option, "use_sender" has been added for people who want
3941 the modified behaviour.
3947 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3950 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3951 indeed breaks things for older releases.
3953 3. Added additional logging to the case where there is a problem reading data
3954 from a filter that is running in a subprocess using a pipe, in order to
3955 try to track down a specific problem.
3957 4. Testing facility fudge: when running in the test harness and attempting
3958 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3959 getting "No route to host". Convert this to a timeout.
3961 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3964 6. Some OS don't have socklen_t but use size_t instead. This affects the
3965 fifth argument of getsockopt() amongst other things. This is now
3966 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3967 can be set for individual OS. I have set it for SunOS5, OSF1, and
3968 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3969 some earlier ones do not.
3971 7. Change 4.30/15 was not doing the test caselessly.
3973 8. The standard form for an IPv6 address literal was being rejected by address
3974 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3975 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3976 this, as well as the form without the "IPv6" on the front (but only when
3977 address literals are enabled, of course).
3979 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3981 10. Exim crashed if a message with an empty sender address specified by -f
3982 encountered a router with an errors_to setting. This could be provoked only
3983 by a command such as
3987 where an empty string was supplied; "<>" did not hit this bug.
3989 11. Installed PCRE release 4.5.
3991 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3992 remained set. It is now erased.
3994 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3995 times from message ids (which are base 36 rather than the normal 62).
3997 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3998 were being counted as actual protocol errors, and logged if the log
3999 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4000 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4001 and DATA following a set of rejected RCPTs do not count as protocol errors.
4002 In other words, Exim assumes they were pipelined, though this may not
4003 actually be the case. Of course, in all cases the client gets an
4004 appropriate error code.
4006 15. If a lookup fails in an ACL condition, a message about the failure may
4007 be available; it is used if testing the ACL cannot continue, because most
4008 such messages specify what the cause of the deferral is. However, some
4009 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4010 that caused an old message to be retained and used if a later statement
4011 caused a defer, replacing the real cause of the deferral.
4013 16. If an IP address had so many PTR records that the DNS lookup buffer
4014 was not large enough to hold them, Exim could crash while trying to process
4015 the truncated data. It now detects and logs this case.
4017 17. Further to 4.21/58, another change has been made: if (and only if) the
4018 first line of a message (the first header line) ends with CRLF, a bare LF
4019 in a subsequent header line has a space inserted after it, so as not to
4020 terminate the header.
4022 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4023 unnecessarily, used atoi() instead of strtol(), and didn't check the
4024 termination when getting file sizes from file names by regex.
4026 19. Completely re-implemented the support for maildirsize files, in the light
4027 of a number of problems with the previous contributed implementation
4028 (4.30/29). In particular:
4030 . If the quota is zero, the maildirsize file is maintained, but no quota is
4033 . If the maildir directory does not exist, it is created before any attempt
4034 to write a maildirsize file.
4036 . The quota value in the file is just a cache; if the quota is changed in
4037 the transport, the new value overrides.
4039 . A regular expression is available for excluding directories from the
4042 20. The autoreply transport checks the characters in options that define the
4043 message's headers; it allows continued headers, but it was checking with
4044 isspace() after an embedded newline instead of explicitly looking for a
4047 21. If all the "regular" hosts to which an address was routed had passed their
4048 expiry times, and had not reached their retry times, the address was
4049 bounced, even if fallback hosts were defined. Now Exim should go on to try
4052 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4053 equivalent code in the SMTP transport. Some hosts send humungous responses
4054 to HELO/EHLO, more than 1024 it seems.
4056 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4057 gives compiler warnings in some environments. I've now done it "properly",
4060 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4061 (because of problems with the built-in one) was declared to return uschar *
4062 instead of char *, causing compiler failure.
4064 25. Fixed a file descriptor leak when processing alias/forward files.
4066 26. Fixed a minor format string issue in dbfn.c.
4068 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4070 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4071 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4074 29. When a sender address is verified, it is cached, to save repeating the test
4075 when there is more than one recipient in a message. However, when the
4076 verification involves a callout, it is possible for different callout
4077 options to be set for different recipients. It is too complicated to keep
4078 track of this in the cache, so now Exim always runs a verification when a
4079 callout is required, relying on the callout cache for the optimization.
4080 The overhead is duplication of the address routing, but this should not be
4083 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4084 to be verified with callout=postmaster, and the main callout worked but the
4085 postmaster check failed, the verification correctly failed. However, if a
4086 subsequent RCPT command asked for sender verification *without* the
4087 postmaster check, incorrect caching caused this verification also to fail,
4090 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4091 it was not caching the DNS options (qualify_single, search_parents) that
4092 were used when the lookup failed. A subsequent lookup with different
4093 options therefore always gave the same answer, though there were cases
4094 where it should not have. (Example: a "domains = !$mx_any" option on a
4095 dnslookup router: the "domains" option is always processed without any
4096 widening, but the router might have qualify_single set.) Now Exim uses the
4097 cached value only when the same options are set.
4099 32. Added John Jetmore's "exipick" utility to the distribution.
4101 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4102 than a timeout (e.g. a certificate is required, and is not provided), an
4103 Exim server now closes the connection immediately. Previously it waited for
4104 the client to close - but if the client is SSL, it seems that they each
4105 wait for each other, leading to a delay before one of them times out.
4107 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4108 maintained 0.8.x compatibility because I don't think many are using it, and
4109 it is clearly obsolete.
4111 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4114 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4115 client certificate was expired. A simple patch fixes this, though I don't
4116 understand the full logic of why the verify callback is called multiple
4119 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4120 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4121 which causes problems with some clients (such as the Certicom SSL Plus
4122 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4123 disables the coutermeasure allowing Eudora to connect."
4125 38. Exim was not checking that a write() to a log file succeeded. This could
4126 lead to Bad Things if a log got too big, in particular if it hit a file
4127 size limit. Exim now panics and dies if it cannot write to a log file, just
4128 as it does if it cannot open a log file.
4130 39. Modified OS/Makefile-Linux so that it now contains
4132 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4134 The two -D definitions ensure that Exim is compiled with large file
4135 support, which makes it possible to handle log files that are bigger than
4138 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4139 instance) a domain was checked against a named list that involved a lookup,
4140 causing $domain_data to be set, then another domain was checked against the
4141 same list, then the first domain was re-checked, the value of $domain_data
4142 after the final check could be wrong. In particular, if the second check
4143 failed, it could be set empty. This bug probably also applied to
4146 41. The strip_trailing_dot option was not being applied to the address given
4147 with the -f command-line option.
4149 42. The code for reading a message's header from the spool was incrementing
4150 $received_count, but never initializing it. This meant that the value was
4151 incorrect (doubled) while delivering a message in the same process in which
4152 it was received. In the most common configuration of Exim, this never
4153 happens - a fresh exec is done - but it can happen when
4154 deliver_drop_privilege is set.
4156 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4157 it now includes up to 150 characters of the unexpected data in the log
4160 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4161 and building data strings. The size of both of these buffers was 10 000
4162 bytes - far larger than anybody would *ever* want, thought I. Needless to
4163 say, somebody hit the limit. I have increased the maximum line length to
4164 20 000 and the maximum data length of concatenated lines to 100 000. I have
4165 also fixed two bugs, because there was no checking on these buffers. Tsk,
4166 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4167 buffer is too small.
4169 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4170 lsearch lookups. Now it does.
4172 46. When parsing a route_list item in a manualroute router, a fixed-length
4173 buffer was used for the list of hosts. I made this 1024 bytes long,
4174 thinking that nobody would ever have a list of hosts that long. Wrong.
4175 Somebody had a whole pile of complicated expansion conditions, and the
4176 string was silently truncated, leading to an expansion error. It turns out
4177 that it is easier to change to an unlimited length (owing to other changes
4178 that have happened since this code was originally written) than to build
4179 structure for giving a limitation error. The length of the item that
4180 expands into the list of hosts is now unlimited.
4182 47. The lsearch lookup could not handle data where the length of text line was
4183 more than 4095 characters. Such lines were truncated, leading to shortened
4184 data being returned. It should now handle lines of any length.
4186 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4187 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4190 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4191 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4192 no longer happens in comment lines. A list of replacements is now placed
4193 at the head of all of the source files, except those whose only change is
4194 to replace PERL_COMMAND in the very first #! line.
4196 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4197 messages on the queue, with a bottom-up merge sort, using code contributed
4198 by Michael Haardt. This should make operations like -bp somewhat faster on
4199 large queues. It won't affect queue runners, except when queue_run_in_order
4202 51. Installed eximstats 1.31 in the distribution.
4204 52. Added support for SRV lookups to the dnslookup router.
4206 53. If an ACL referred to $message_body or $message_body_end, the value was not
4207 reset for any messages that followed in the same SMTP session.
4209 54. The store-handling optimization for building very long strings was not
4210 differentiating between the different store pools. I don't think this
4211 actually made any difference in practice, but I've tidied it.
4213 55. While running the routers to verify a sender address, $sender_address
4214 was still set to the sender address. This is wrong, because when routing to
4215 send a bounce to the sender, it would be empty. Therefore, I have changed
4216 it so that, while verifying a sender address, $sender_address is set to <>.
4217 (There is no change to what happens when verifying a recipient address.)
4219 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4220 target A or AAAA records (if not already returned) without resetting the
4221 qualify_single or search_parents options of the DNS resolver. These are
4222 inappropriate in this case because the targets of MX and SRV records must
4223 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4224 target that, when qualified, matched something in the local domain. These
4225 two options are now turned off when doing these lookups.
4227 57. It seems that at least some releases of Reiserfs (which does not have the
4228 concept of a fixed number of inodes) returns zero and not -1 for the
4229 number of available inodes. This interacted badly with check_spool_inodes,
4230 which assumed that -1 was the "no such thing" setting. What I have done is
4231 to check that the total number of inodes is greater than zero before doing
4232 the test of how many are available.
4234 58. When a "warn" ACL statement has a log_message modifier, the message is
4235 remembered, and not repeated. This is to avoid a lot of repetition when a
4236 message has many recipients that cause the same warning to be written.
4237 Howewer, Exim was preserving the list of already written lines for an
4238 entire SMTP session, which doesn't seem right. The memory is now reset if a
4239 new message is started.
4241 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4242 debugging output unless log_rewrite was also set.
4244 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4245 of (int)(handle) when we know that handle contains (void *)(-1).
4247 61. The Exim daemon panic-logs an error return when it closes the incoming
4248 connection. However "connection reset by peer" seems to be common, and
4249 isn't really an error worthy of noting specially, so that particular error
4252 62. When Exim is trying to find all the local interfaces, it used to panic and
4253 die if the ioctl to get the interface flags failed. However, it seems that
4254 on at least one OS (Solaris 9) it is possible to have an interface that is
4255 included in the list of interfaces, but for which you get a failure error
4256 for this call. This happens when the interface is not "plumbed" into a
4257 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4258 failure of the "get flags" call assumes that the interface is down.
4260 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4261 makes life easier for people who are doing arithmetic on fields extracted
4262 from dates, where you often get leading zeros that should not be
4263 interpreted as octal.
4265 64. Added qualify_domain to the redirect router, to override the global
4268 65. If a pathologically long header line contained very many addresses (the
4269 report of this problem mentioned 10 000) and each of them was rewritten,
4270 Exim could use up a very large amount of memory. (It kept on making new
4271 copies of the header line as it rewrote, and never released the old ones.)
4272 At the expense of a bit more processing, the header rewriting function has
4273 been changed so that it no longer eats memory in this way.
4275 66. The generation of the Received: header has been moved from the time that a
4276 message starts to be received, to the time that it finishes. The timestamp
4277 in the Received: header should now be very close to that of the <= log
4278 line. There are two side-effects of this change:
4280 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4281 logged header lines no longer include the local Received: line, because
4282 it has not yet been created. The same applies to a copy of the message
4283 that is returned to a non-SMTP sender when a message is rejected.
4285 (b) When a filter file is tested using -bf, no additional Received: header
4286 is added to the test message. After some thought, I decided that this
4289 This change does not affect the value of $received_for. It is still set
4290 after address rewriting, but before local_scan() is called.
4292 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4294 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4295 gave an unhelpful panic error message, and a defer error. I have managed to
4296 change this behaviour so that it now rejects any supplied certificate,
4297 which seems right, as the list of acceptable certificates is empty.
4299 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4300 gave an unhelpful defer error. I have not managed to make this reject any
4301 supplied certificates, but the error message it gives is "no certificate
4302 supplied", which is not helpful.
4304 70. exigrep's output now also includes lines that are not associated with any
4305 message, but which match the given pattern. Implemented by a patch from
4306 Martin Sluka, which also tidied up the Perl a bit.
4308 71. Recipient callout verification, like sender verification, was using <> in
4309 the MAIL FROM command. This isn't really the right thing, since the actual
4310 sender may affect whether the remote host accepts the recipient or not. I
4311 have changed it to use the actual sender in the callout; this means that
4312 the cache record is now keyed on a recipient/sender pair, not just the
4313 recipient address. There doesn't seem to be a real danger of callout loops,
4314 since a callout by the remote host to check the sender would use <>.
4315 [SEE ABOVE: changed after hitting problems.]
4317 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4318 temporary errors. However, in the case of such a code being given after
4319 the end of a data transmission (i.e. after ".") Exim was failing to write
4320 a retry record for the message. (Yes, there was some broken host that was
4321 actually sending 8xx at this point.)
4323 73. An unknown lookup type in a host list could cause Exim to panic-die when
4324 the list was checked. (An example that provoked this was putting <; in the
4325 middle of a list instead of at the start.) If this happened during a DATA
4326 ACL check, a -D file could be left lying around. This kind of configuration
4327 error no longer causes Exim to die; instead it causes a defer errror. The
4328 incident is still logged to the main and panic logs.
4330 74. Buglet left over from Exim 3 conversion. The message "too many messages
4331 in one connection" was written to the rejectlog but not the mainlog, except
4332 when address rewriting (yes!) was being logged.
4334 75. Added write_rejectlog option.
4336 76. When a system filter was run not as root (that is, when system_filter_user
4337 was set), the values of the $n variables were not being returned to the
4338 main process; thus, they were not subsequently available in the $sn
4341 77. Added +return_path_on_delivery log selector.
4343 78. A connection timeout was being treated differently from recipients deferred
4344 when testing hosts_max_try with a message that was older than the host's
4345 retry timeout. (The host should not be counted, thus allowing all hosts to
4346 be tried at least once before bouncing.) This may have been the cause of an
4347 occasionally reported bug whereby a message would remain on the queue
4348 longer than the retry timeout, but would be bounced if a delivery was
4349 forced. I say "may" because I never totally pinned down the problem;
4350 setting up timeout/retry tests is difficult. See also the next item.
4352 79. The ultimate address timeout was not being applied to errors that involved
4353 a combination of host plus message (for example, a timeout on a MAIL
4354 command). When an address resolved to a number of possible hosts, and they
4355 were not all tried for each delivery (e.g. because of hosts_max_try), a
4356 message could remain on the queue longer than the retry timeout.
4358 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4361 81. Fixed an obscure SMTP outgoing bug which required at least the following
4362 conditions: (a) there was another message waiting for the same server;
4363 (b) the server returned 5xx to all RCPT commands in the first message so
4364 that the message was not completed; (c) the server dropped the connection
4365 or gave a negative response to the RSET that Exim sends to abort the
4366 transaction. The observed case was a dropped connection after DATA that had
4367 been sent in pipelining mode. That is, the server had advertised PIPELINING
4368 but was not implementing it correctly. The effect of the bug was incorrect
4369 behaviour, such as trying another host, and this could lead to a crash.
4375 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4376 and daemon.c were passed as pointers to ints; they should have been
4377 pointers to socklen_t variables (which are typically unsigned ints).
4379 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4382 3. Fixed a really odd bug that affected only the testing scheme; patching a
4383 certain fixed string in the binary changed the value of another string that
4384 happened to be identical to the end of the original first string.
4386 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4387 name", it returns that address as the IP address. On some operating
4388 systems (e.g. Solaris), it also passes back the IP address string as the
4389 "host name". However, on others (e.g. Linux), it passes back an empty
4390 string. Exim wasn't checking for this, and was changing the host name to an
4391 empty string, assuming it had been canonicized.
4393 5. Although rare, it is permitted to have more than one PTR record for a given
4394 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4395 all the names associated with an address, because they do in Solaris.
4396 However, it seems that they do not in Linux for data that comes from the
4397 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4398 I found this out when I moved to a new Linux workstation and tried to run
4399 the Exim test suite.
4401 To get round this problem I have changed the code so that it now does its
4402 own call to the DNS to look up PTR records when searching for a host name.
4403 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4404 addresses that are only in /etc/hosts are still found.
4406 This behaviour is, however, controlled by an option called host_lookup_
4407 order, which defaults to "bydns:byaddr". If people want to use the other
4408 order, or indeed, just use one or the other means of lookup, they can
4409 specify it in this variable.
4411 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4412 some operating systems, this comes back from gethostbyaddr() as an empty
4413 string, and this is what Exim used to test for. However, it seems that in
4414 other systems, "." is yielded. Exim now tests for this case too.
4416 7. The values of check_spool_space and check_log_space are now held internally
4417 as a number of kilobytes instead of an absolute number of bytes. If a
4418 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4419 kilobyte. This means that much larger values can be stored.
4421 8. Exim monitor: an attempt to get the action menu when not actually pointing
4422 at a message produces an empty menu entitled "No message selected". This
4423 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4424 no entries in it ("Shell widget menu has zero width and/or height"). So I
4425 have added a single, blank menu entry in this case.
4427 9. Added ${quote_local_part.
4429 10. MIME decoding is now applied to the contents of Subject: header lines when
4432 11. Now that a reference to $sender_host_address automatically causes a reverse
4433 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4434 host lookup before query-style lookups in lists that might use this
4435 variable. This has therefore been abolished, and the "net-" prefix is no
4436 longer necessary for query-style lookups.
4438 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4439 have been a typo for LFLAGS, so it has been changed.
4441 13. The install script calls Exim with "-C /dev/null" in order to find the
4442 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4443 to be output. Howeve, since Exim outputs its version number before the
4444 error, it didn't break the script. It just looked ugly. I fixed this by
4445 always allowing "-C /dev/null" if the caller is root.
4447 14. Ignore overlarge ACL variable number when reading spool file - insurance
4448 against a later release with more variables having written the file.
4450 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4451 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4452 this, as well as the form without the "IPv6" on the front.
4454 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4455 OS/Makefile-Darwin file.
4457 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4458 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4460 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4461 variable. However, some OS use ints for inodes. I've added cast to long int
4462 to get rid of the compiler warning.
4464 19. I had forgotten to lock out "/../" in configuration file names when
4465 ALT_CONFIG_PREFIX was set.
4467 20. Routers used for verification do not need to specify transports. However,
4468 if such a router generated a host list, and callout was configured, Exim
4469 crashed, because it could not find a port number from the (non-existent)
4470 transport. It now assumes port 25 in this circumstance.
4472 21. Added the -t option to exigrep.
4474 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4475 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4476 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4477 them is set, LOOKUP_LSEARCH is forced.
4479 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4481 24. Added sender and host information to the "rejected by local_scan()" log
4482 line; previously there was no indication of these.
4484 25. Added .include_if_exists.
4486 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4487 Linux. It turns out that not all file systems support this. Apparently some
4488 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4489 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4490 not supported on the file descriptor, is now ignored when Exim is trying to
4491 sync a directory. This applies only to Linux.
4493 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4495 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4496 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4499 29. Added support for maildirsize files from supplied patch (modified a bit).
4501 30. The use of :fail: followed by an empty string could lead Exim to respond to
4502 sender verification failures with (e.g.):
4504 550 Verification failed for <xxx>
4505 550 Sender verify failed
4507 where the first response line was missing the '-' that indicates it is not
4508 the final line of the response.
4510 31. The loop for finding the name of the user that called Exim had a hardwired
4511 limit of 10; it now uses the value of finduser_retries, which is used for
4512 all other user lookups.
4514 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4517 33. Exim was neglecting to zero errno before one call of strtol() when
4518 expanding a string and expecting an integer value. On some systems this
4519 resulted in spurious "integer overflow" errors. Also, it was casting the
4520 result into an int without checking.
4522 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4523 did not work. The code looks as if it has *never* worked, though it appears
4524 to have been documented since at least releast 1.62. I have made it work.
4526 35. The "timeout_DNS" error in retry rules, also documented since at least
4527 1.62, also never worked. As it isn't clear exactly what this means, and
4528 clearly it isn't a major issue, I have abolished the feature by treating it
4529 as "timeout", and writing a warning to the main and panic logs.
4531 36. The display of retry rules for -brt wasn't always showing the error code
4534 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4535 timeout_connect_A, timeout_connect_MX.
4537 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4538 to the empty sender.
4540 39. The daemon was not analysing the content of -oX till after it had closed
4541 stderr and disconnected from the controlling terminal. This meant that any
4542 syntax errors were only noted on the panic log, and the return code from
4543 the command was 0. By re-arranging the code a little, I've made the
4544 decoding happen first, so such errors now appear on stderr, and the return
4545 code is 1. However, the actual setting up of the sockets still happens in
4546 the disconnected process, so errors there are still only recorded on the
4549 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4550 connections (as happens on some IP stacks) was logged at start up time as
4551 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4552 it from "IPv6 and IPv4", which means that two separate sockets are being
4555 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4556 says whether AF_INET or AF_INET6 was passed as an argument.
4558 42. Exiwhat output was messed up when time zones were included in log
4561 43. Exiwhat now gives more information about the daemon's listening ports,
4562 and whether -tls-on-connect was used.
4564 44. The "port" option of the smtp transport is now expanded.
4566 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4567 silently ignored. Now an error message is written to the main and panic
4570 46. There's a new ACL modifier called "logwrite" which writes to a log file
4571 as soon as it is encountered.
4573 47. Added $local_user_uid and $local_user_gid at routing time.
4575 48. Exim crashed when trying to verify a sender address that was being
4578 49. Exim was recognizing only a space character after ".include". It now also
4579 recognizes a tab character.
4581 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4582 extracting the relevant information from the specification. The man page no
4583 longer contains scrambled data for the -d option, and I've added a section
4584 at the front about calling Exim under different names.
4586 51. Added "extra_headers" argument to the "mail" command in filter files.
4588 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4591 53. Installed eximstats 1.29.
4593 54. Added transport_filter_timeout as a generic transport option.
4595 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4596 Cc: header lines. This was required by RFC 822, but it not required by RFC
4599 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4600 incoming messages that did not have them. Now it does so only if the
4601 message originates locally, that is, if there is no associated remote host
4602 address. When Resent- header lines are present, this applies to the Resent-
4603 lines rather than the non-Resent- lines.
4605 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4606 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4608 58. Messages for configuration errors now include the name of the main
4609 configuration file - useful now that there may be more than one file in a
4610 list (.included file names were always shown).
4612 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4613 for those rare installations that do not start the daemon as root or run it
4614 setuid root. I've cut out the call to initgroups() if the daemon is not
4617 60. The Exim user and group can now be bound into the binary as text strings
4618 that are looked up at the start of Exim's processing.
4620 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4622 62. Added $mailstore_basename variable.
4624 63. Installed patch to sieve.c from Michael Haardt.
4626 64. When Exim failed to open the panic log after failing to open the main log,
4627 the original message it was trying to log was written to stderr and debug
4628 output, but if they were not available (the usual case in production), it
4629 was lost. Now it is written to syslog before the two lines that record the
4630 failures to open the logs.
4632 65. Users' Exim filters run in subprocesses under the user's uid. It is
4633 possible for a "deliver" command or an alias in a "personal" command to
4634 provoke an address rewrite. If logging of address rewriting is configured,
4635 this fails because the process is not running as root or exim. There may be
4636 a better way of dealing with this, but for the moment (because 4.30 needs
4637 to be released), I have disabled address rewrite logging when running a
4638 filter in a non-root, non-exim process.
4644 1. The buildconfig auxiliary program wasn't quoting the value set for
4645 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4646 not defined. This bug was masked in 4.22 by the effect that was fixed in
4649 2. Some messages that were rejected after a message id was allocated were
4650 shown as "incomplete" by exigrep. It no longer does this for messages that
4651 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4653 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4654 have allow_domain_literals set, the ID did not get logged in the <= line.
4655 Domain literals are now always recognized in Message-ID: header lines.
4657 4. The first argument for a ${extract expansion item is the key name or field
4658 number. Leading and trailing spaces in this item were not being ignored,
4659 causing some misleading effects.
4661 5. When deliver_drop_privilege was set, single queue runner processes started
4662 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4663 same command in the process it spins off) were not dropping privilege.
4665 6. When the daemon running as "exim" started a queue runner, it always
4666 re-executed Exim in the spun-off process. This is a waste of effort when
4667 deliver_drop_privilege is set. The new process now just calls the
4668 queue-runner function directly.
4674 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4677 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4678 ignored. Though the use of -oP was forcing the writing of a pid file, it
4679 was always written to the default place.
4681 3. If the message "no IP address found for host xxxx" is generated during
4682 incoming verification, it is now followed by identification of the incoming
4683 connection (so you can more easily find what provoked it).
4685 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4687 5. Added some features to "harden" Exim a bit more against certain attacks:
4689 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4690 be put in Local/Makefile. This is like the never_users runtime option,
4691 but it cannot be overridden. The default setting is "root".
4693 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4694 prefix string with which any file named in a -C command line option
4697 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4698 is retained for -C and -D only if the caller of Exim is root. Without
4699 it, the exim user may also use -C and -D and retain privilege.
4701 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4702 command line option is disabled.
4704 6. Macro names set by the -D option must start with an upper case letter, just
4705 like macro names defined in the configuration file.
4707 7. Added "dereference=" facility to LDAP.
4709 8. Two instances of the typo "uknown" in the source files are fixed.
4711 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4712 the Configure-Makefile script screwed up while processing it.
4714 10. Incorporated PCRE 4.4.
4716 11. The SMTP synchronization check was not operating right at the start of an
4717 SMTP session. For example, it could not catch a HELO sent before the client
4718 waited for the greeting. There is now a check for outstanding input at the
4719 point when the greeting is written. Because of the duplex, asynchronous
4720 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4721 way, but not yet received, when the check is performed.
4723 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4724 on TCP/IP sockets, because this apparently causes some broken clients to
4727 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4728 unchanged) from the Cygwin maintainer.
4730 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4731 was supported instead of testing for mbx. Effectively a typo.
4733 15. The spa authenticator server code was not checking that the input it
4734 received was valid base64.
4736 16. The debug output line for the "set" modifier in ACLs was not showing the
4737 name of the variable that was being set.
4739 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4741 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4742 lookup on its own. Something else was needed to trigger the lookup. For
4743 example, a match in host_lookup or the need for a host name in a host list.
4744 Now, if $sender_host_name is referenced and the host name has not yet been
4745 looked up, a lookup is performed. If the lookup fails, the variable remains
4746 empty, and $host_lookup_failed is set to "1".
4748 19. Added "eqi" as a case-independent comparison operator.
4750 20. The saslauthd authentication condition could segfault if neither service
4751 nor realm was specified.
4753 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4754 error message that was logged was misleading, and incoming SMTP
4755 connections were dropped. The message is now more accurate, and temporary
4756 errors are given to SMTP connections.
4758 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4759 (except RSET) with a 421 error, until QUIT is received. However, it was
4760 failing to send a response to QUIT.
4762 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4763 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4764 ACL is now run after the helo_try_verify_hosts code.
4766 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4767 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4768 case-independent, so other case variants are also recognized). Apparently
4769 some systems use these upper case variants.
4771 25. If more than two messages were waiting for the same host, and a transport
4772 filter was specified for the transport, Exim sent two messages over the
4773 same TCP/IP connection, and then failed with "socket operation on non-
4774 socket" when it tried to send the third.
4776 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4778 27. The extern definition of crypt16() in expand.c was not being excluded when
4779 the OS had its own crypt16() function.
4781 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4782 as a preferred synonym for return_size_limit, both as an option and as an
4785 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4787 30. Changed the default configuration ACL to relax the local part checking rule
4788 for addresses that are not in any local domains. For these addresses,
4789 slashes and pipe symbols are allowed within local parts, but the sequence
4790 /../ is explicitly forbidden.
4792 31. SPA server authentication was not clearing the challenge buffer before
4795 32. log_message in a "warn" ACL statement was writing to the reject log as
4796 well as to the main log, which contradicts the documentation and doesn't
4797 seem right (because no rejection is happening). So I have stopped it.
4799 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4800 However, I am unable to do any testing of this.
4802 34. Fixed an infelicity in the appendfile transport. When checking directories
4803 for a mailbox, to see if any needed to be created, it was accidentally
4804 using path names with one or more superfluous leading slashes; tracing
4805 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4807 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4808 contents are added to the log line that is written for every discarded
4809 recipient. (Previously a log_message setting was ignored.)
4811 36. The ${quote: operator now quotes the string if it is empty.
4813 37. The install script runs exim in order to find its version number. If for
4814 some reason other than non-existence or emptiness, which it checks, it
4815 could not run './exim', it was installing it with an empty version number,
4816 i.e. as "exim-". This error state is now caught, and the installation is
4819 38. An argument was missing from the function that creates an error message
4820 when Exim fails to connect to the socket for saslauthd authentication.
4821 This could cause Exim to crash, or give a corrupted message.
4823 39. Added isip, isip4, and isip6 to ${if conditions.
4825 40. The ACL variables $acl_xx are now saved with the message, and can be
4826 accessed later in routers, transports, and filters.
4828 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4829 strings in the file are not string-expanded.
4831 42. If a MAIL command specified a SIZE value that was too large to fit into an
4832 int variable, the check against message_size_limit failed. Such values are
4833 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4834 day this will have to be increased, but I don't think I want to be around
4835 when emails are that large.
4842 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4843 iconv() is not standard in FreeBSD.
4845 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4846 IPv6 enabled. The observed symptom was a segmentation fault on return from
4847 the function os_common_find_running_interfaces() in src/os.c.
4849 3. In the check_special_case() function in daemon.c I had used "errno" as an
4850 argument name, which causes warnings on some systems. This was basically a
4851 typo, since it was named "eno" in the comments!
4853 4. The code that waits for the clock to tick (at a resolution of some fraction
4854 of a second) so as to ensure message-id uniqueness was always waiting for
4855 at least one whole tick, when it could have waited for less. [This is
4856 almost certainly not relevant at current processor speeds, where it is
4857 unlikely to ever wait at all. But we try to future-proof.]
4859 5. The function that sleeps for a time interval that includes fractions of a
4860 second contained a race. It did not block SIGALRM between setting the
4861 timer, and suspending (a couple of lines later). If the interval was short
4862 and the sigsuspend() was delayed until after it had expired, the suspension
4863 never ended. On busy systems this could lead to processes getting stuck for
4866 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4867 process, before it forks any delivery processes. The open lookup caching
4868 mechanism meant that the open file or database connection was passed into
4869 the delivery process. The problem was that delivery processes always tidy
4870 up cached lookup data. This could cause a problem for the next delivery
4871 process started by the queue runner, because the external queue runner
4872 process does not know about the closure. So the next delivery process
4873 still has data in the lookup cache. In the case of a file lookup, there was
4874 no problem because closing a file descriptor in a subprocess doesn't affect
4875 the parent. However, if the lookup was caching a connection to a database,
4876 the connection was closed, and the second delivery process was likely to
4877 see errors such as "PGSQL: query failed: server closed the connection
4878 unexpectedly". The problem has been fixed by closing all cached lookups
4879 in a queue runner before running a delivery process.
4881 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4882 seem to have the "const" qualifier which it has on other OS. I've
4885 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4886 *of the same type* (client or server) with the same public name that an
4887 error should be diagnosed.
4889 9. When Exim looked up a host name for an IP address, but failed to find the
4890 original IP address when looking up the host name (a safety check), it
4891 output the message "<ip address> does not match any IP for NULL", which was
4892 confusing, to say the least. The bug was that the host name should have
4893 appeared instead of "NULL".
4895 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4896 user that is built into the binary, and the -C or -D options is used, root
4897 privilege is dropped before the configuration file is read. In addition,
4898 logging is switched to stderr instead of the normal log files. If the
4899 configuration then re-defines the Exim user, the unprivileged environment
4900 is probably not what is expected, so Exim logs a panic warning message (but
4903 However, if deliver_drop_privilege is set, the unprivileged state may well
4904 be exactly what is intended, so the warning has been cut out in that case,
4905 and Exim is allowed to try to write to its normal log files.
4911 1. smtp_return_error_details was not giving details for temporary sender
4912 or receiver verification errors.
4914 2. Diagnose a configuration error if two authenticators have the same public
4917 3. Exim used not to create the message log file for a message until the first
4918 delivery attempt. This could be confusing when incoming messages were held
4919 for policy or load reasons. The message log file is now created at the time
4920 the message is received, and an initial "Received" line is written to it.
4922 4. The automatically generated man page for command line options had a minor
4923 bug that caused no ill effects; however, a more serious problem was that
4924 the procedure for building the man page automatically didn't always
4925 operate. Consequently, release 4.20 contains an out-of-date version. This
4926 shouldn't happen again.
4928 5. When building Exim with embedded Perl support, the script that builds the
4929 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4930 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4932 6. The freeze_tell option was not being used for messages that were frozen on
4933 arrival, either by an ACL or by local_scan().
4935 7. Added the smtp_incomplete_transaction log selector.
4937 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4938 was accepting AUTH without a new EHLO.
4940 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4941 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4944 10. Logging of TCP/IP connections (when configured) now happens in the main
4945 daemon process instead of the child process, so that the TCP/IP connection
4946 count is more accurate (but it can never be perfect).
4948 11. The use of "drop" in a nested ACL was not being handled correctly in the
4949 outer ACL. Now, if condition failure induced by the nested "drop" causes
4950 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4951 or "require"), the connection is dropped.
4953 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4954 that yield "discard" can now be used with an "accept" or a "discard" verb,
4955 but an error is generated for any others (because I can't see a useful way
4956 to define what should happen).
4958 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4959 are now processed in the same way as lines in the Exim configuration file.
4960 In particular, continuation lines are supported.
4962 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4964 15. Added -ti meaning -t -i.
4966 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4967 domains, and warn by logging if others are found.
4969 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4970 returned from GIFCONF when Exim is trying to find the list of interfaces on
4971 a host. The code in os.c has been modified to copy each ifreq to an aligned
4972 structure in all cases.
4974 Also, in some cases, the returned ifreq's were being copied to a 'struct
4975 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4976 means the last couple of bytes of an IPv6 address could be chopped if the
4977 ifreq contained only a normal sockaddr (14 bytes storage).
4979 18. Named domain lists were not supported in the hosts_treat_as_local option.
4980 An entry such as +xxxx was not recognized, and was treated as a literal
4983 19. Ensure that header lines added by a DATA ACL are included in the reject log
4984 if the ACL subsequently rejects the message.
4986 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4987 MD5 (which is deprecated).
4989 21. When testing a filter file using -bf, Exim was writing a message when it
4990 took the sender from a "From " line in the message, but it was not doing so
4991 when it took $return_path from a Return-Path: header line. It now does.
4993 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4994 with a valid header line field name (a series of printing characters
4995 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4997 23. Changed "disc" in the source to "disk" to conform to the documentation and
4998 the book and for uniformity.
5000 24. Ignore Sendmail's -Ooption=value command line item.
5002 25. When execve() failed while trying to run a command in a pipe transport,
5003 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5004 could be confused with a return value of 69 from the command itself. This
5005 has been changed to 127, the value the shell returns if it is asked to run
5006 a non-existent command. The wording for the related log line suggests a
5007 non-existent command as the problem.
5009 26. If received_header_text expands to an empty string, do not add a Received:
5010 header line to the message. (Well, it adds a token one on the spool, but
5011 marks it "old" so that it doesn't get used or transmitted.)
5013 27. Installed eximstats 1.28 (addition of -nt option).
5015 28. There was no check for failure on the call to getsockname() in the daemon
5016 code. This can fail if there is a shortage of resources on the system, with
5017 ENOMEM, for example. A temporary error is now given on failure.
5019 29. Contrary to the C standard, it seems that in some environments, the
5020 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5021 program. Exim now does this explicitly; it affects the formatting of
5022 timestamps using strftime().
5024 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5025 complaints. I've now initialized all the variables, to avoid this.
5027 32. Header lines added by a system filter were not being "seen" during
5028 transport-time rewrites.
5030 33. The info_callback() function passed to OpenSSL is set up with type void
5031 (*)(SSL *, int, int), as described somewhere. However, when calling the
5032 function (actually a macro) that sets it up, the type void(*)() is
5033 expected. I've put in a cast to prevent warnings from picky compilers.
5035 34. If a DNS black list lookup found a CNAME record, but there were no A
5036 records associated with the domain it pointed at, Exim crashed.
5038 35. If a DNS black list lookup returned more than one A record, Exim ignored
5039 all but the first. It now scans all returned addresses if a particular IP
5040 value is being sought. In this situation, the contents of the
5041 $dnslist_value variable are a list of all the addresses, separated by a
5044 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5045 to accept a host name and all its aliases if the forward lookup for any of
5046 them yielded the IP address of the incoming connection. Now it accepts only
5047 those names whose forward lookup yields the correct IP address. Any other
5048 names are discarded. This closes a loophole whereby a rogue DNS
5049 administrator could create reverse DNS records to break through a
5050 wildcarded host restriction in an ACL.
5052 37. If a user filter or a system filter that ran in a subprocess used any of
5053 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5054 the wrong values were passed to the pipe command ($thisaddress had the
5055 value of $0, $0 had the value of $1, etc). This bug was introduced by
5056 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5058 38. Improved the line breaking for long SMTP error messages from ACLs.
5059 Previously, if there was no break point between 40 and 75 characters, Exim
5060 left the rest of the message alone. Two changes have been made: (a) I've
5061 reduced the minimum length to 35 characters; (b) if it can't find a break
5062 point between 35 and 75 characters, it looks ahead and uses the first one
5063 that it finds. This may give the occasional overlong line, but at least the
5064 remaining text gets split now.
5066 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5067 file descriptors might be low, and that setting 1000 would always raise it.
5068 It turns out that in some environments, the limit is already over 1000 and
5069 that lowering it causes trouble. So now Exim takes care not to decrease it.
5071 40. When delivering a message, the value of $return_path is set to $sender_
5072 address at the start of routing (routers may change the value). By an
5073 oversight, this default was not being set up when an address was tested by
5074 -bt or -bv, which affected the outcome if any router or filter referred to
5077 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5078 log only when "message" or "log_message" are set. However, if one of the
5079 conditions was an address verification, or a call to a nested ACL, the
5080 messages generated by the underlying test were being passed through. This
5081 no longer happens. The underlying message is available in $acl_verify_
5082 message for both "message" and "log_message" expansions, so it can be
5083 passed through if needed.
5085 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5086 new expansion $bh_ to give the encoded byte string without charset
5087 translation. Translation happens only if iconv() is available; HAVE_ICONV
5088 indicates this at build time. HEADERS_CHARSET gives the charset to
5089 translate to; headers_charset can change it in the configuration, and
5090 "headers charset" can change it in an individual filter file.
5092 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5093 that creates RFC 2047 encoded "words" labels them as that charset instead
5094 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5095 expansion operator; (ii) when Exim creates a From: line for a local
5096 message; (iii) when a header line is rewritten to include a "phrase" part.
5098 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5099 buggy, causing it to skip the first lines of messages whose message ID
5100 ended in 'D'. This would not have bitten before Exim release 4.14, because
5101 message IDs were unlikely to end in 'D' before then. The effect was to have
5102 incorrect size information for certain domains.
5104 45. #include "config.h" was missing at the start of the crypt16.c module. This
5105 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5108 46. If there was a timeout during a "random" callout check, Exim treated it as
5109 a failure of the random address, and carried on sending RSET and the real
5110 address. If the delay was just some slowness somewhere, the response to the
5111 original RCPT would be taken as a response to RSET and so on, causing
5112 mayhem of various kinds.
5114 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5115 when I implemented it. It didn't allow for the fact that some option values
5116 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5117 the right test for positive values.
5119 48. Domain names in DNS records are case-independent. Exim always looks them up
5120 in lower case. Some resolvers return domain names in exactly the case they
5121 appear in the zone file, that is, they may contain uppercase letters. Not
5122 all resolvers do this - some return always lower case. Exim was treating a
5123 change of case by a resolver as a change of domain, similar to a widening
5124 of a domain abbreviation. This triggered its re-routing code and so it was
5125 trying to route what was effectively the same domain again. This normally
5126 caused routing to fail (because the router wouldn't handle the domain
5127 twice). Now Exim checks for this case specially, and just changes the
5128 casing of the domain that it ultimately uses when it transmits the message
5131 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5134 50. If a filter generated a file delivery with a non-absolute name (possible if
5135 no home directory exists for the router), the forbid_file option was not
5138 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5139 the existing equality matching.
5141 52. Exim was using ints instead of ino_t variables in some places where it was
5142 dealing with inode numbers.
5144 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5145 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5146 called TMPDIR, and if it finds it is different, it changes its value.
5148 54. The smtp_printf() function is now made available to local_scan() so
5149 additional output lines can be written before returning. There is also an
5150 smtp_fflush() function to enable the detection of a dropped connection.
5151 The variables smtp_input and smtp_batched_input are exported to
5154 55. Changed the default runtime configuration: the message "Unknown user"
5155 has been removed from the ACL, and instead placed on the localuser router,
5156 using the cannot_route_message feature. This means that any verification
5157 failures that generate their own messages won't get overridden. Similarly,
5158 the "Unrouteable address" message that was in the ACL for unverifiable
5159 relay addresses has also been removed.
5161 56. Added hosts_avoid_esmtp to the smtp transport.
5163 57. The exicyclog script was not checking for the esoteric option
5164 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5165 will work only if exicyclog is run under the appropriate euid.
5167 58. Following a discussion on the list, the rules by which Exim recognises line
5168 endings on incoming messages have been changed. The -dropcr and drop_cr
5169 options are now no-ops, retained only for backwards compatibility. The
5170 following line terminators are recognized: LF CRLF CR. However, special
5171 processing applies to CR:
5173 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5174 nor a local message in the state where . is a terminator.
5176 (ii) If a bare CR is encountered in a header line, an extra space is added
5177 after the line terminator so as not to end the header. The reasoning
5178 behind this is that bare CRs in header lines are most likely either
5179 to be mistakes, or people trying to play silly games.
5181 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5182 was being incorrectly given as 18 bytes larger than it should have been.
5183 This is a VOB (very old bug).
5185 60. This may never have affected anything current, but just in case it has:
5186 When the local host is found other than at the start of a list of hosts,
5187 the local host, those with the same MX, and any that follow, are discarded.
5188 When the list in question was part of a longer list of hosts, the following
5189 hosts (not currently being processed) were also being discarded. This no
5190 longer happens. I'm not sure if this situation could ever has previously
5193 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5196 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5197 header. This is something that is recommended in a new Internet Draft, and
5198 is something that is documented as being done by Sendmail. There are two
5199 possible values. For messages generated by the autoreply transport, Exim
5202 Auto-Submitted: auto-replied
5204 whereas for all other generated messages (e.g. bounces) it adds
5206 Auto-Submitted: auto-generated
5208 63. The "personal" condition in filters now includes a test for the
5209 Auto-Submitted: header. If it contains the string "auto-" the message it
5210 not considered personal.
5212 64. Added rcpt_include_affixes as a generic transport option.
5214 65. Added queue_only_override (default true).
5216 66. Added the syslog_duplication option.
5218 67. If what should have been the first header line of a message consisted of
5219 a space followed by a colon, Exim was mis-interpreting it as a header line.
5220 It isn't of course - it is syntactically invalid and should therefore be
5221 treated as the start of the message body. The misbehaviour could have
5222 caused a number of strange effects, including loss of data in subsequent
5223 header lines, and spool format errors.
5225 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5226 client host had authenticated. This control can now be exercised by an ACL
5227 for more flexibility.
5229 69. By default, callouts do not happen when testing with -bh. There is now a
5230 variant, -bhc, which does actually run the callout code, including
5231 consulting and updating the callout cache.
5233 70. Added support for saslauthd authentication, courtesy of Alexander
5236 71. If statvfs() failed on the spool or log directories while checking their
5237 size for availability, Exim confusingly gave the error "space shortage".
5238 Furthermore, in debugging mode it crashed with a floating point exception.
5239 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5240 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5241 serious problem, Exim now writes to the main and panic logs when this
5242 happens, with details of the failure. It then refuses to accept the
5243 incoming message, giving the message "spool directory problem" or "log
5244 directory problem" with a 421 code for SMTP messages.
5246 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5247 0, 1, and 2 exist, because some OS complain for execs without them (see
5248 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5249 descriptors. However, the code omitted to check that the open succeeded,
5250 causing mysterious errors if for some reason the permissions on /dev/null
5251 got screwed. Now Exim writes a message to the main and panic logs, and
5252 bombs out if it can't open /dev/null.
5254 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5255 interact so that it is all more flexible. It is supposed to remain
5256 backwards compatible. Also added extra_local_interfaces.
5258 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5259 to bomb out with an assertion failure - to the client this appears as a
5260 connection drop. This problem occurs in the part of the code that was taken
5261 from the Samba project. Fortunately, the assertion is in a very simple
5262 function, so I have fixed this by reproducing the function inline in the
5263 one place where it is called, and arranging for authentication to fail
5264 instead of killing the process with assert().
5266 75. The SPA client code was not working when the server requested OEM rather
5267 than Unicode encoding.
5269 76. Added code to make require_files with a specific uid setting more usable in
5270 the case where statting the file as root fails - usually a non-root-mounted
5271 NFS file system. When this happens and the failure is EACCES, Exim now
5272 forks a subprocess and does the per-uid checking as the relevant uid.
5274 77. Added process_log_path.
5276 78. If log_file_path was not explicitly set, a setting of check_log_space or
5277 check_log_inodes was ignored.
5279 79. If a space check for the spool or log partitions fails, the incident is now
5280 logged. Of course, in the latter case the data may get lost...
5282 80. Added the %p formatting code to string_format() so that it can be used to
5283 print addresses in debug_print(). Adjusted all the address printing in the
5284 debugging in store.c to use %p rather than %d.
5286 81. There was a concern that a line of code in smtp_in.c could overflow a
5287 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5288 initially expressed, the concern was not well-founded, because trailing
5289 spaces are removed early. However, if the trailing spaces were followed by
5290 a NULL, they did not get removed, so the overflow was possible. Two fixes
5293 (a) I re-wrote the offending code in a cleaner fashion.
5294 (b) If an incoming SMTP command contains a NULL character, it is rejected
5297 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5298 runs initgroups(), so that if the Exim user is in any additional groups,
5299 they will be used during message reception.
5305 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob