1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Solaris build fix for Oracle's LDAP libraries.
8 Bugzilla 1109, patch from Stephen Usher.
10 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
12 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
15 TF/02 Fix a couple more cases where we did not log the error message
16 when unlink() failed. See also change 4.74-TF/03.
18 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
19 lock up or crash if it happened to be inside a call to libc when it
20 got a SIGUSR1 from exiwhat.
22 The SIGUSR1 handler appends the current process status to the process
23 log which is later printed by exiwhat. It used to use the general
24 purpose logging code to do this, but several functions it calls are
27 The new output code in the SIGUSR1 handler is specific to the process
28 log, and simple enough that it's easy to inspect for signal safety.
29 Removing some special cases also simplifies the general logging code.
30 Removing the spurious timestamps from the process log simplifies
33 TF/04 Improved ratelimit ACL condition.
35 The /noupdate option has been deprecated in favour of /readonly which
36 has clearer semantics. The /leaky, /strict, and /readonly update modes
37 are mutually exclusive. The update mode is no longer included in the
38 database key; it just determines when the database is updated. (This
39 means that when you upgrde Exim will forget old rate measurements.)
41 Exim now checks that the per_* options are used with an update mode that
42 makes sense for the current ACL. For example, when Exim is processing a
43 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
44 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
45 must specify per_mail/readonly. If you omit the update mode it defaults to
46 /leaky where that makes sense (as before) or /readonly where required.
48 The /noupdate option is now undocumented but still supported for
49 backwards compatibility. It is equivalent to /readonly except that in
50 ACLs where /readonly is required you may specify /leaky/noupdate or
51 /strict/noupdate which are treated the same as /readonly.
53 A useful new feature is the /count= option. This is a generalization
54 of the per_byte option, so that you can measure the throughput of other
55 aggregate values. For example, the per_byte option is now equivalent
56 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
58 The per_rcpt option has been generalized using the /count= mechanism
59 (though it's more complicated than the per_byte equivalence). When it is
60 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
61 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
62 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
63 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
64 Note that using per_rcpt with a non-readonly update mode in more than
65 one ACL will cause the recipients to be double-counted. (The per_mail
66 and per_byte options don't have this problem.)
68 The handling of very low rates has changed slightly. If the computed rate
69 is less than the event's count (usually one) then this event is the first
70 after a long gap. In this case the rate is set to the same as this event's
71 count, so that the first message of a spam run is counted properly.
73 The major new feature is a mechanism for counting the rate of unique
74 events. The new per_addr option counts the number of different
75 recipients that someone has sent messages to in the last time period. It
76 behaves like per_rcpt if all the recipient addresses are different, but
77 duplicate recipient addresses do not increase the measured rate. Like
78 the /count= option this is a general mechanism, so the per_addr option
79 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
80 example, measure the rate that a client uses different sender addresses
81 with the options per_mail/unique=$sender_address. There are further
82 details in the main documentation.
84 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
86 TF/06 Removed a few PCRE remnants.
88 TF/07 Automatically extract Exim's version number from tags in the git
89 repository when doing development or release builds.
91 PP/02 Raise smtp_cmd_buffer_size to 16kB. Patch from Paul Fisher.
98 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
100 PP/02 Harmonised TLS library version reporting; only show if debugging.
101 Layout now matches that introduced for other libraries in 4.74 PP/03.
103 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
105 PP/04 New "dns_use_edns0" global option.
107 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
110 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
111 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
113 TK/01 Updated PolarSSL code to 0.14.2.
114 Bugzilla 1097. Patch from Andreas Metzler.
116 PP/07 Catch divide-by-zero in ${eval:...}.
119 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
122 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
123 format-string attack -- SECURITY: remote arbitrary code execution.
125 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
126 time unintentionally subject to list matching rules, letting the header
127 cause arbitrary Exim lookups (of items which can occur in lists, *not*
128 arbitrary string expansion). This allowed for information disclosure.
130 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
131 INT_MIN/-1 -- value coerced to INT_MAX.
137 NM/01 Workround for PCRE version dependency in version reporting
140 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
141 This fixes portability to compilers other than gcc, notably
142 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
144 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
145 makefiles for portability to HP-UX and POSIX correctness.
147 PP/01 Permit LOOKUP_foo enabling on the make command-line.
148 Also via indented variable definition in the Makefile.
149 (Debugging by Oliver Heesakkers).
151 PP/02 Restore caching of spamd results with expanded spamd_address.
152 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
154 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
155 Improves build reliability. Fix from: Frank Elsner
157 NM/02 Fix wide character breakage in the rfc2047 coding
158 Fixes bug 1064. Patch from Andrey N. Oktyabrski
160 NM/03 Allow underscore in dnslist lookups
161 Fixes bug 1026. Patch from Graeme Fowler
163 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
164 Code patches from Adam Ciarcinski of NetBSD.
166 NM/04 Fixed exiqgrep to cope with mailq missing size issue
169 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
170 is logged, to avoid truncation. Patch from John Horne.
172 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
173 Patch from Jakob Hirsch.
175 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
176 SQL string expansion failure details.
177 Patch from Andrey Oktyabrski.
179 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
180 Patch from Simon Arlott.
182 PP/09 New lookups functionality failed to compile on old gcc which rejects
183 extern declarations in function scope.
184 Patch from Oliver Fleischmann
186 PP/10 Use sig_atomic_t for flags set from signal handlers.
187 Check getgroups() return and improve debugging.
188 Fixed developed for diagnosis in bug 927 (which turned out to be
191 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
192 Patch from Mark Zealey.
194 PP/12 Bugzilla 1056: Improved spamd server selection.
195 Patch from Mark Zealey.
197 PP/13 Bugzilla 1086: Deal with maildir quota file races.
198 Based on patch from Heiko Schlittermann.
200 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
201 Patch from Uwe Doering, sign-off by Michael Haardt.
203 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
204 variable declaration deep within a block. Bug and patch from
207 PP/15 lookups-Makefile IRIX compatibilty coercion.
209 PP/16 Make DISABLE_DKIM build knob functional.
211 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
212 Patch by Simon Arlott
214 TF/03 Fix valgrind.h portability to C89 compilers that do not support
215 variable argument macros. Our copy now differs from upstream.
221 TF/01 Failure to get a lock on a hints database can have serious
222 consequences so log it to the panic log.
224 TF/02 Log LMTP confirmation messages in the same way as SMTP,
225 controlled using the smtp_confirmation log selector.
227 TF/03 Include the error message when we fail to unlink a spool file.
229 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
230 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
231 for maintaining out-of-tree patches for some time.
233 PP/01 Bugzilla 139: Documentation and portability issues.
234 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
235 Handle per-OS dynamic-module compilation flags.
237 PP/02 Let /dev/null have normal permissions.
238 The 4.73 fixes were a little too stringent and complained about the
239 permissions on /dev/null. Exempt it from some checks.
240 Reported by Andreas M. Kirchwitz.
242 PP/03 Report version information for many libraries, including
243 Exim version information for dynamically loaded libraries. Created
244 version.h, now support a version extension string for distributors
245 who patch heavily. Dynamic module ABI change.
247 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
248 privilege escalation vulnerability whereby the Exim run-time user
249 can cause root to append content of the attacker's choosing to
252 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
255 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
256 If dropping privileges for untrusted macros, we disabled normal logging
257 on the basis that it would fail; for the Exim run-time user, this is not
258 the case, and it resulted in successful deliveries going unlogged.
259 Fixed. Reported by Andreas Metzler.
265 PP/01 Date: & Message-Id: revert to normally being appended to a message,
266 only prepend for the Resent-* case. Fixes regression introduced in
267 Exim 4.70 by NM/22 for Bugzilla 607.
269 PP/02 Include check_rfc2047_length in configure.default because we're seeing
270 increasing numbers of administrators be bitten by this.
272 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
274 PP/03 Bugzilla 994: added openssl_options main configuration option.
276 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
278 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
280 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
282 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
283 without a peer certificate, leading to a segfault because of an
284 assumption that peers always have certificates. Be a little more
285 paranoid. Problem reported by Martin Tscholak.
287 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
288 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
289 NB: ClamAV planning to remove STREAM in "middle of 2010".
290 CL also introduces -bmalware, various -d+acl logging additions and
291 more caution in buffer sizes.
293 PP/09 Implemented reverse_ip expansion operator.
295 PP/10 Bugzilla 937: provide a "debug" ACL control.
297 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
299 PP/12 Bugzilla 973: Implement --version.
301 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
303 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
305 PP/15 Bugzilla 816: support multiple condition rules on Routers.
307 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
308 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
309 ignore trailing whitespace.
311 JJ/02 prevent non-panic DKIM error from being sent to paniclog
313 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
316 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
317 Notification from Dr Andrew Aitchison.
319 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
320 ExtendedDetectionInfo response format.
321 Notification from John Horne.
323 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
326 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
327 XSL and documented dependency on system catalogs, with examples of how
330 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
333 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
334 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
335 configuration file which is writeable by the Exim user or group.
337 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
338 of configuration files to cover files specified with the -C option if
339 they are going to be used with root privileges, not just the default
342 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
343 option (effectively making it always true).
345 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
346 files to be used while preserving root privileges.
348 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
349 that rogue child processes cannot use them.
351 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
352 run-time user, instead of root.
354 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
355 Exim run-time user without dropping privileges.
357 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
358 result string, instead of calling string_vformat() twice with the same
361 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
362 for other users. Others should always drop root privileges if they use
363 -C on the command line, even for a whitelisted configure file.
365 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
367 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
373 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
374 $data_path, and $header_path variables; fixed documentation bugs and
377 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
378 exipick to access non-standard spools, including the "frozen" queue
381 NM/01 Bugzilla 965: Support mysql stored procedures.
382 Patch from Alain Williams
384 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
386 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
387 Patch from Andreas Metzler
389 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
390 Patch from Kirill Miazine
392 NM/05 Bugzilla 671: Added umask to procmail example.
394 JJ/03 installed exipick 20100323.0, fixing doc bug
396 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
397 directory. Notification and patch from Dan Rosenberg.
399 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
401 TK/02 Improve log output when DKIM signing operation fails.
403 MH/01 Treat the transport option dkim_domain as a colon separated
404 list, not as a single string, and sign the message with each element,
405 omitting multiple occurences of the same signer.
407 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
408 Bugzilla 985, 986. Patch by Simon Arlott
410 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
411 Patch by Simon Arlott
413 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
414 MBX locking. Notification from Dan Rosenberg.
420 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
422 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
424 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
426 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
428 NM/04 Bugzilla 915: Flag broken perl installation during build.
434 TK/01 Added patch by Johannes Berg that expands the main option
435 "spamd_address" if it starts with a dollar sign.
437 TK/02 Write list of recipients to X-Envelope-Sender header when building
438 the mbox-format spool file for content scanning (suggested by Jakob
441 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
442 (http://www.dcc-servers.net/) support via dccifd. Activated by
443 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
445 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
446 by Mark Daniel Reidel <mr@df.eu>.
448 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
449 When building exim an external PCRE library is now needed -
450 PCRE is a system library on the majority of modern systems.
451 See entry on PCRE_LIBS in EDITME file.
453 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
454 conversation. Added nologin parameter to request.
455 Patch contributed by Kirill Miazine.
457 TF/01 Do not log submission mode rewrites if they do not change the address.
459 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
461 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
462 log files in place. Contributed by Roberto Lima.
464 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
466 TF/03 Bugzilla 615: When checking the local_parts router precondition
467 after a local_part_suffix or local_part_prefix option, Exim now
468 does not use the address's named list lookup cache, since this
469 contains cached lookups for the whole local part.
471 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
472 Robert Millan. Documentation is in experimental-spec.txt.
474 TF/04 Bugzilla 668: Fix parallel build (make -j).
476 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
478 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
479 Patch provided by Jan Srzednicki.
481 TF/05 Leading white space used to be stripped from $spam_report which
482 wrecked the formatting. Now it is preserved.
484 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
485 that they are available at delivery time.
487 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
489 TF/08 TLS error reporting now respects the incoming_interface and
490 incoming_port log selectors.
492 TF/09 Produce a more useful error message if an SMTP transport's hosts
493 setting expands to an empty string.
495 NM/06 Bugzilla 744: EXPN did not work under TLS.
496 Patch provided by Phil Pennock.
498 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
499 Patch provided by Richard Godbee.
501 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
502 acl_smtp_notquit, added index entry.
504 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
505 Patch provided by Eugene Bujak.
507 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
508 accept(). Patch provided by Maxim Dounin.
510 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
511 Patch provided by Phil Pennock.
513 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
515 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
516 Patch provided by Brad "anomie" Jorsch.
518 NM/14 Bugzilla 622: Added timeout setting to transport filter.
519 Patch provided by Dean Brooks.
521 TK/05 Add native DKIM support (does not depend on external libraries).
523 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
524 Patch provided by Graeme Fowler.
526 NM/16 Bugzilla 851: Documentation example syntax fix.
528 NM/17 Changed NOTICE file to remove references to embedded PCRE.
530 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
533 NM/19 Bugzilla 745: TLS version reporting.
534 Patch provided by Phil Pennock.
536 NM/20 Bugzilla 167: bool: condition support.
537 Patch provided by Phil Pennock.
539 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
540 clients. Patch provided by Phil Pennock.
542 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
543 Patch provided by Brad "anomie" Jorsch.
545 NM/23 Bugzilla 687: Fix misparses in eximstats.
546 Patch provided by Heiko Schlittermann.
548 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
549 Patch provided by Heiko Schlittermann.
551 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
552 plus update to original patch.
554 NM/26 Bugzilla 799: Documentation correction for ratelimit.
556 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
557 Patch provided by David Brownlee.
559 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
561 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
563 NM/30 Bugzilla 888: TLS documentation bugfixes.
565 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
567 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
568 Unlike the original bugzilla I have changed all shell scripts in src tree.
570 NM/33 Bugzilla 898: Transport filter timeout fix.
571 Patch by Todd Rinaldo.
573 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
574 Patch by Serge Demonchaux.
576 NM/35 Bugzilla 39: Base64 decode bug fixes.
577 Patch by Jakob Hirsch.
579 NM/36 Bugzilla 909: Correct connect() call in dcc code.
581 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
583 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
585 NM/39 Bugzilla 911: Fixed MakeLinks build script.
591 TK/01 Add preliminary DKIM support. Currently requires a forked version of
592 ALT-N's libdkim that I have put here:
593 http://duncanthrax.net/exim-experimental/
595 Note to Michael Haardt: I had to rename some vars in sieve.c. They
596 were called 'true' and it seems that C99 defines that as a reserved
597 keyword to be used with 'bool' variable types. That means you could
598 not include C99-style headers which use bools without triggering
599 build errors in sieve.c.
601 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
602 as mailq or other aliases. Changed the --help handling significantly
603 to do whats expected. exim_usage() emits usage/help information.
605 SC/01 Added the -bylocaldomain option to eximstats.
607 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
609 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
611 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
617 PH/01 Another patch from the Sieve maintainer.
619 PH/02 When an IPv6 address is converted to a string for single-key lookup
620 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
621 dots are used instead of colons so that keys in lsearch files need not
622 contain colons. This was done some time before quoting was made available
623 in lsearch files. However, iplsearch files do require colons in IPv6 keys
624 (notated using the quote facility) so as to distinguish them from IPv4
625 keys. This meant that lookups for IP addresses in host lists did not work
626 for iplsearch lookups.
628 This has been fixed by arranging for IPv6 addresses to be expressed with
629 colons if the lookup type is iplsearch. This is not incompatible, because
630 previously such lookups could never work.
632 The situation is now rather anomolous, since one *can* have colons in
633 ordinary lsearch keys. However, making the change in all cases is
634 incompatible and would probably break a number of configurations.
636 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
639 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
640 conversion specification without a maximum field width, thereby enabling
641 a rogue spamd server to cause a buffer overflow. While nobody in their
642 right mind would setup Exim to query an untrusted spamd server, an
643 attacker that gains access to a server running spamd could potentially
644 exploit this vulnerability to run arbitrary code as the Exim user.
646 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
647 $primary_hostname instead of what libspf2 thinks the hosts name is.
649 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
650 a directory entry by the name of the lookup key. Previously, if a
651 symlink pointed to a non-existing file or a file in a directory that
652 Exim lacked permissions to read, a lookup for a key matching that
653 symlink would fail. Now it is enough that a matching directory entry
654 exists, symlink or not. (Bugzilla 503.)
656 PH/03 The body_linecount and body_zerocount variables are now exported in the
659 PH/04 Added the $dnslist_matched variable.
661 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
662 This means they are set thereafter only if the connection becomes
665 PH/06 Added the client_condition to authenticators so that some can be skipped
666 by clients under certain conditions.
668 PH/07 The error message for a badly-placed control=no_multiline_responses left
669 "_responses" off the end of the name.
671 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
673 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
674 (without spaces) instead of just copying the configuration text.
676 PH/10 Added the /noupdate option to the ratelimit ACL condition.
678 PH/11 Added $max_received_linelength.
680 PH/12 Added +ignore_defer and +include_defer to host lists.
682 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
683 way in which PCRE > 7.0 is built.
685 PH/14 Implemented queue_only_load_latch.
687 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
688 MAIL command. The effect was to mangle the value on 64-bit systems.
690 PH/16 Another patch from the Sieve maintainer.
692 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
694 PH/18 If a system quota error occurred while trying to create the file for
695 a maildir delivery, the message "Mailbox is full" was not appended to the
696 bounce if the delivery eventually timed out. Change 4.67/27 below applied
697 only to a quota excession during the actual writing of the file.
699 PH/19 It seems that peer DN values may contain newlines (and other non-printing
700 characters?) which causes problems in log lines. The DN values are now
701 passed through string_printing() before being added to log lines.
703 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
704 and InterBase are left for another time.)
706 PH/21 Added message_body_newlines option.
708 PH/22 Guard against possible overflow in moan_check_errorcopy().
710 PH/23 POSIX allows open() to be a macro; guard against that.
712 PH/24 If the recipient of an error message contained an @ in the local part
713 (suitably quoted, of course), incorrect values were put in $domain and
714 $local_part during the evaluation of errors_copy.
720 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
721 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
724 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
725 issue a MAIL command.
727 PH/02 In an ACL statement such as
729 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
731 if a client was not listed at all, or was listed with a value other than
732 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
733 the condition was not true (as it should be), so access was not denied.
734 The bug was that the ! inversion was incorrectly passed on to the second
735 item. This has been fixed.
737 PH/03 Added additional dnslists conditions == and =& which are different from
738 = and & when the dns lookup returns more than one IP address.
740 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
741 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
743 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
744 FSYNC, which compiles an option called disable_fsync that allows for
745 bypassing fsync(). The documentation is heavily laced with warnings.
747 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
749 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
750 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
751 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
752 including adding "make clean"; (3) Added -fPIC when compiling the test
753 dynamically loaded module, to get rid of a warning.
755 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
756 message fails, move_frozen_messages = true and ignore_bounce_errors_after
757 = 0s. The bug is otherwise harmless.
759 PH/07 There was a bug in the dovecot authenticator such that the value of
760 $auth1 could be overwritten, and so not correctly preserved, after a
761 successful authentication. This usually meant that the value preserved by
762 the server_setid option was incorrect.
764 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
766 PH/09 Installed PCRE release 7.0.
768 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
769 run for batched SMTP input. It is now run at the start of every message
770 in the batch. While fixing this I discovered that the process information
771 (output by running exiwhat) was not always getting set for -bs and -bS
772 input. This is fixed, and it now also says "batched" for BSMTP.
774 PH/11 Added control=no_pipelining.
776 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
777 patch, slightly modified), and move the expansion of helo_data till after
778 the connection is made in the smtp transport (so it can use these
781 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
783 PH/14 Added log_selector = +pid.
785 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
787 PH/16 Add ${if forany and ${if forall.
789 PH/17 Added dsn_from option to vary the From: line in DSNs.
791 PH/18 Flush SMTP output before performing a callout, unless control =
792 no_callout_flush is set.
794 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
795 was true (the default) a successful delivery failed to delete the retry
796 item, thus causing premature timeout of the address. The bug is now
799 PH/20 Added hosts_avoid_pipelining to the smtp transport.
801 PH/21 Long custom messages for fakedefer and fakereject are now split up
802 into multiline reponses in the same way that messages for "deny" and
803 other ACL rejections are.
805 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
806 with slight modification.
808 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
809 draft, changing the syntax and factoring some duplicate code".
811 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
812 for deliveries of the second and subsequent messages over the same SMTP
815 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
816 ${reduce, with only minor "tidies".
818 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
820 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
821 expansion side effects.
823 PH/27 When a message times out after an over-quota error from an Exim-imposed
824 quota, the bounce message says "mailbox is full". This message was not
825 being given when it was a system quota that was exceeded. It now should
828 MH/03 Made $recipients available in local_scan(). local_scan() already has
829 better access to the recipient list through recipients_list[], but
830 $recipients can be useful in postmaster-provided expansion strings.
832 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
833 in the case of a MAIL command with additional options following the
834 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
835 were accidentally chopped off.
837 PH/29 SMTP synchronization checks are implemented when a command is read -
838 there is a check that no more input is waiting when there shouldn't be
839 any. However, for some commands, a delay in an ACL can mean that it is
840 some time before the response is written. In this time, more input might
841 arrive, invalidly. So now there are extra checks after an ACL has run for
842 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
843 pipelining has not been advertised.
845 PH/30 MH's patch to allow iscntrl() characters to be list separators.
847 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
848 returned in the SMTP response when smtp_return_error_details was false.
851 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
852 instead of the C I/O that was originally supplied, because problems were
855 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
856 Exim which did not show up earlier: it was assuming that a call to
857 SSL_CTX_set_info_callback() might give an error value. In fact, there is
858 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
859 was a macro that became an assignment, so it seemed to work. This has
860 changed to a proper function call with a void return, hence the compile
861 error. Exim's code has been fixed.
863 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
866 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
868 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
870 PH/37 If a message is not accepted after it has had an id assigned (e.g.
871 because it turns out to be too big or there is a timeout) there is no
872 "Completed" line in the log. When some messages of this type were
873 selected by exigrep, they were listed as "not completed". Others were
874 picked up by some special patterns. I have improved the selection
875 criteria to be more general.
877 PH/38 The host_find_failed option in the manualroute router can now be set
878 to "ignore", to completely ignore a host whose IP address cannot be
879 found. If all hosts are ignored, the behaviour is controlled by the new
880 host_all_ignored option.
882 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
883 homing or because of multiple MX records with /mx) generated more than
884 one IP address, and the following item turned out to be the local host,
885 all the secondary addresses of the first item were incorrectly removed
886 from the list, along with the local host and any following hosts (which
887 is what is supposed to happen).
889 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
890 whoever called Exim into the -H file. In the case of the daemon it was
891 behaving confusingly. When first started, it used values for whoever
892 started the daemon, but after a SIGHUP it used the Exim user (because it
893 calls itself on a restart). I have changed the code so that it now always
896 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
897 message are rejected with the same error (e.g. no authentication or bad
898 sender address), and a DATA command is nevertheless sent (as can happen
899 with PIPELINING or a stupid MUA), the error message that was given to the
900 RCPT commands is included in the rejection of the DATA command. This is
901 intended to be helpful for MUAs that show only the final error to their
904 PH/42 Another patch from the Sieve maintainer.
906 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
907 Eximstats - Fixed some broken HTML links and added missing column headers
909 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
910 columns for Rejects, Temp Rejects, Ham, and Spam rows.
912 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
914 PH/43 Yet another patch from the Sieve maintainer.
916 PH/44 I found a way to check for a TCP/IP connection going away before sending
917 the response to the final '.' that terminates a message, but only in the
918 case where the client has not sent further data following the '.'
919 (unfortunately, this is allowed). However, in many cases there won't be
920 any further data because there won't be any more messages to send. A call
921 to select() can be used: if it shows that the input is "ready", there is
922 either input waiting, or the socket has been closed. An attempt to read
923 the next input character can distinguish the two cases. Previously, Exim
924 would have sent an OK response which the client would never have see.
925 This could lead to message repetition. This fix should cure that, at
926 least in a lot of common cases.
928 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
929 advertised in response to EHLO.
935 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
936 fixed by 4.65/MH/01 (is this a record?) are fixed:
938 (i) An empty string was always treated as zero by the numeric comparison
939 operators. This behaviour has been restored.
941 (ii) It is documented that the numeric comparison operators always treat
942 their arguments as decimal numbers. This was broken in that numbers
943 starting with 0 were being interpreted as octal.
945 While fixing these problems I realized that there was another issue that
946 hadn't been noticed. Values of message_size_limit (both the global option
947 and the transport option) were treated as octal if they started with 0.
948 The documentation was vague. These values are now always treated as
949 decimal, and I will make that clear in the documentation.
955 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
956 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
959 MH/01 Don't check that the operands of numeric comparison operators are
960 integers when their expansion is in "skipping" mode (fixes bug
961 introduced by 4.64-PH/07).
963 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
964 child addresses, Exim now panics and dies. Previously, because the count
965 is held in a short int, deliveries were likely to be lost. As such a
966 large number of recipients for a single message is ridiculous
967 (performance will be very, very poor), I have chosen to impose a limit
968 rather than extend the field.
974 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
975 leftover -K file (the existence of which was triggered by #402).
976 While we were at it, introduced process PID as part of the -K
977 filename. This should rule out race conditions when creating
980 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
981 processing considerably. Previous code took too long for large mails,
982 triggering a timeout which in turn triggers #401.
984 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
985 in the DK code in transports.c. sendfile() is not really portable,
986 hence the _LINUX specificness.
988 TF/01 In the add_headers option to the mail command in an Exim filter,
989 there was a bug that Exim would claim a syntax error in any
990 header after the first one which had an odd number of characters
993 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
994 callout verification, Exim cached a "reject" for the entire domain. This
995 is correct for most verifications, but it is not correct for a recipient
996 verification with use_sender or use_postmaster set, because in that case
997 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
998 case of MAIL FROM:<> rejection from other early rejections (e.g.
999 rejection of HELO). When verifying a recipient using a non-null MAIL
1000 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1001 Whatever the result of the callout, the value of the domain cache is
1002 left unchanged (for any other kind of callout, getting as far as trying
1003 RCPT means that the domain itself is ok).
1005 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1008 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1009 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1010 session, the daemon ignores ECONNECT errors and logs others; it now
1011 ignores EPIPE as well.
1013 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1014 (quoted-printable decoding).
1016 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1017 later the small subsequent patch to fix an introduced bug.
1019 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1021 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1023 PH/08 An error is now given if message_size_limit is specified negative.
1025 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1026 to be given (somewhat) arbitrary names.
1028 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1031 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1032 miscellaneous code fixes
1034 PH/10 Added the log_reject_target ACL modifier to specify where to log
1037 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1038 hostname. This is wrong, because it relates to the incoming message (and
1039 probably the interface on which it is arriving) and not to the outgoing
1040 callout (which could be using a different interface). This has been
1041 changed to use the value of the helo_data option from the smtp transport
1042 instead - this is what is used when a message is actually being sent. If
1043 there is no remote transport (possible with a router that sets up host
1044 addresses), $smtp_active_hostname is used.
1046 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1047 tweaks were necessary in order to get it to work (see also 21 below):
1048 (a) The code assumed that strncpy() returns a negative number on buffer
1049 overflow, which isn't the case. Replaced with Exim's string_format()
1051 (b) There were several signed/unsigned issues. I just did the minimum
1052 hacking in of casts. There is scope for a larger refactoring.
1053 (c) The code used strcasecmp() which is not a standard C function.
1054 Replaced with Exim's strcmpic() function.
1055 (d) The code set only $1; it now sets $auth1 as well.
1056 (e) A simple test gave the error "authentication client didn't specify
1057 service in request". It would seem that Dovecot has changed its
1058 interface. Fortunately there's a specification; I followed it and
1059 changed what the client sends and it appears to be working now.
1061 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1064 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1065 address A is aliased to B and C, where B exists and C does not. Without
1066 -v the output is "A verified" because verification stops after a
1067 successful redirection if more than one address is generated. However,
1068 with -v the child addresses are also verified. Exim was outputting "A
1069 failed to verify" and then showing the successful verification for C,
1070 with its parentage. It now outputs "B failed to verify", showing B's
1071 parentage before showing the successful verification of C.
1073 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1074 look up a TXT record in a specific list after matching in a combined
1077 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1078 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1079 they consult the DNS. I had assumed they would set it the way they
1080 wanted; and indeed my experiments on Linux seem to show that in some
1081 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1082 To be on the safe side, however, I have now made the interface to
1083 host_find_byname() similar to host_find_bydns(), with an argument
1084 containing the DNS resolver options. The host_find_byname() function now
1085 sets these options at its start, just as host_find_bydns() does. The smtp
1086 transport options dns_qualify_single and dns_search_parents are passed to
1087 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1088 of host_find_byname() use the default settings of RES_DEFNAMES
1089 (qualify_single) but not RES_DNSRCH (search_parents).
1091 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1092 spool_read_header() do less string testing, by means of a preliminary
1093 switch on the second character of optional "-foo" lines. (This is
1094 overdue, caused by the large number of possibilities that now exist.
1095 Originally there were few.) While I was there, I also converted the
1096 str(n)cmp tests so they don't re-test the leading "-" and the first
1097 character, in the hope this might squeeze out yet more improvement.
1099 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1100 flag allowing group syntax was set by the header_syntax check but not
1101 turned off, possible causing trouble later; (2) The flag was not being
1102 set at all for the header_verify test, causing "group"-style headers to
1103 be rejected. I have now set it in this case, and also caused header_
1104 verify to ignore an empty address taken from a group. While doing this, I
1105 came across some other cases where the code for allowing group syntax
1106 while scanning a header line wasn't quite right (mostly, not resetting
1107 the flag correctly in the right place). These bugs could have caused
1108 trouble for malformed header lines. I hope it is now all correct.
1110 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1111 with the "reply" argument non-NULL. The code, however (which originally
1112 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1113 but it didn't always do it. This confused somebody who was copying the
1114 code for some other use. I have removed all the tests.
1116 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1117 feature that was used to support insecure browsers during the U.S. crypto
1118 embargo. It requires special client support, and Exim is probably the
1119 only MTA that supported it -- and would never use it because real RSA is
1120 always available. This code has been removed, because it had the bad
1121 effect of slowing Exim down by computing (never used) parameters for the
1122 RSA_EXPORT functionality.
1124 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1125 authenticator to fail if there's a tab character in the incoming data
1126 (there should never be unless someone is messing about, as it's supposed
1127 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1128 if the connection is using TLS or if the remote IP is the same as the
1129 local IP, and the "valid-client-cert option" if a client certificate has
1132 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1133 authenticators. This can be used for authorization after authentication
1134 succeeds. (In the case of plaintext, it servers for both authentication
1137 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1138 if any retry times were supplied.
1140 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1141 connection, where there is no client IP address to check. In this
1142 situation, the verify now always succeeds.
1144 PH/25 Applied John Jetmore's -Mset patch.
1146 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1148 PH/27 In a string expansion for a processed (not raw) header when multiple
1149 headers of the same name were present, leading whitespace was being
1150 removed from all of them, but trailing whitespace was being removed only
1151 from the last one. Now trailing whitespace is removed from each header
1152 before concatenation. Completely empty headers in a concatenation (as
1153 before) are ignored.
1155 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1156 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1158 PH/29 [Removed. This was a change that I later backed out, and forgot to
1159 correct the ChangeLog entry (that I had efficiently created) before
1160 committing the later change.]
1162 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1163 address errors (4xx response to RCPT) over the same connection as other
1164 messages routed to the same hosts. Such deliveries are always "forced",
1165 so retry times are not inspected. This resulted in far too many retries
1166 for the affected addresses. The effect occurred only when there were more
1167 hosts than the hosts_max_try setting in the smtp transport when it had
1168 the 4xx errors. Those hosts that it had tried were not added to the list
1169 of hosts for which the message was waiting, so if all were tried, there
1170 was no problem. Two fixes have been applied:
1172 (i) If there are any address or message errors in an SMTP delivery, none
1173 of the hosts (tried or untried) are now added to the list of hosts
1174 for which the message is waiting, so the message should not be a
1175 candidate for sending over the same connection that was used for a
1176 successful delivery of some other message. This seems entirely
1177 reasonable: after all the message is NOT "waiting for some host".
1178 This is so "obvious" that I'm not sure why it wasn't done
1179 previously. Hope I haven't missed anything, but it can't do any
1180 harm, as the worst effect is to miss an optimization.
1182 (ii) If, despite (i), such a delivery is accidentally attempted, the
1183 routing retry time is respected, so at least it doesn't keep
1184 hammering the server.
1186 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1187 in ${readsocket because some servers need this prod.
1189 PH/32 Added some extra debug output when updating a wait-xxx database.
1191 PH/33 The hint "could be header name not terminated by colon", which has been
1192 given for certain expansion errors for a long time, was not being given
1193 for the ${if def:h_colon_omitted{... case.
1195 PH/34 The spec says: "With one important exception, whenever a domain list is
1196 being scanned, $domain contains the subject domain." There was at least
1197 one case where this was not true.
1199 PH/35 The error "getsockname() failed: connection reset by peer" was being
1200 written to the panic log as well as the main log, but it isn't really
1201 panic-worthy as it just means the connection died rather early on. I have
1202 removed the panic log writing for the ECONNRESET error when getsockname()
1205 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1206 runs only) independently of the message's sender address. This meant
1207 that, if the 4xx error was in fact related to the sender, a different
1208 message to the same recipient with a different sender could confuse
1209 things. In particualar, this can happen when sending to a greylisting
1210 server, but other circumstances could also provoke similar problems.
1211 I have changed the default so that the retry time for these errors is now
1212 based a combination of the sender and recipient addresses. This change
1213 can be overridden by setting address_retry_include_sender=false in the
1216 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1217 remote server are returned as part of bounce messages. This was not
1218 happening for LMTP over a pipe (the lmtp transport), but now it is the
1219 same for both kinds of LMTP.
1221 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1222 in header lines that were in fact CNAMEs. This is no longer the case.
1224 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1225 and queue runs started by the daemon processed all messages. This has
1226 been fixed so that -R and -S can now usefully be given with -q<time>.
1228 PH/40 Import PCRE release 6.7 (fixes some bugs).
1230 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1232 PH/42 Give an error if -q is specified more than once.
1234 PH/43 Renamed the variables $interface_address and $interface_port as
1235 $received_ip_address and $received_port, to make it clear that these
1236 values apply to message reception, and not to the outgoing interface when
1237 a message is delivered. (The old names remain recognized, of course.)
1239 PH/44 There was no timeout on the connect() call when using a Unix domain
1240 socket in the ${readsocket expansion. There now is.
1242 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1243 be meaningful with "accept".
1245 SC/01 Eximstats V1.43
1246 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1248 SC/02 Eximstats V1.44
1249 Use a glob alias rather than an array ref in the generated
1250 parser. This improves both readability and performance.
1252 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1253 Collect SpamAssassin and rejection statistics.
1254 Don't display local sender or destination tables unless
1255 there is data to show.
1256 Added average volumes into the top table text output.
1258 SC/04 Eximstats V1.46
1259 Collect data on the number of addresses (recipients)
1260 as well as the number of messages.
1262 SC/05 Eximstats V1.47
1263 Added 'Message too big' to the list of mail rejection
1264 reasons (thanks to Marco Gaiarin).
1266 SC/06 Eximstats V1.48
1267 Mainlog lines which have GMT offsets and are too short to
1268 have a flag are now skipped.
1270 SC/07 Eximstats V1.49 (Alain Williams)
1271 Added the -emptyok flag.
1273 SC/08 Eximstats V1.50
1274 Fixes for obtaining the IP address from reject messages.
1276 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1277 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1278 whitesspace changes from 4.64-PH/27
1280 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1283 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1284 are found, allow negative numbers in numeric criteria)
1286 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1288 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1289 to match changes made in 4.64-PH/43
1291 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1293 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1294 "domain" is actually an IP address, and force a failure. This locks out
1295 those revolvers/nameservers that support "A-for-A" lookups, in
1296 contravention of the specifications.
1298 PH/48 When a host name was looked up from an IP address, and the subsequent
1299 forward lookup of the name timed out, the host name was left in
1300 $sender_host_name, contrary to the specification.
1302 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1303 restricted to single-key lookups, Exim was not diagnosing an error if
1304 * or *@ was used with a query-style lookup.
1306 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1308 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1309 long ago, but noone interested enough thought of it. Let's just say that
1310 the "1.1" means that there are some new functions that weren't there at
1311 some point in the past.
1313 PH/51 Error processing for expansion failure of helo_data from an smtp
1314 transport during callout processing was broken.
1316 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1317 tested/used via the -bh/-bhc/-bs options.
1319 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1320 bug, fixed in subsequent PCRE releases).
1322 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1323 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1325 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1331 SC/01 Use a glob alias rather than an array ref in eximstats generated
1332 parser. This improves both readability and performance.
1334 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1335 Don't display local sender or destination tables in eximstats unless
1336 there is data to show.
1337 Added average volumes into the eximstats top table text output.
1339 SC/03 Collect data on the number of addresses (recipients) as well
1340 as the number of messages in eximstats.
1342 TF/01 Correct an error in the documentation for the redirect router. Exim
1343 does (usually) call initgroups() when daemonizing.
1345 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1346 with consistent privilege compared to when running as a daemon.
1348 TF/03 Note in the spec that $authenticated_id is not set for local
1349 submissions from trusted users.
1351 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1352 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1354 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1355 by adding some example configuration directives to the default
1356 configuration file. A little bit of work is required to uncomment the
1357 directives and define how usernames and passwords are checked, but
1358 there is now a framework to start from.
1360 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1361 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1362 without this. I don't know how relevant this is to other LDAP libraries.
1364 PH/02 Add the verb name to the "unknown ACL verb" error.
1366 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1368 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1370 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1371 directory not expanded when it should be if an expanded home directory
1372 was set for the address (which is overridden by the transport).
1374 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1377 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1378 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1379 because it is too late at that time, and has no effect.
1381 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1382 security issue with \' (bugzilla #107). I could not use the
1383 PQescapeStringConn() function, because it needs a PGconn value as one of
1386 PH/08 When testing addresses using -bt, indicate those final addresses that
1387 are duplicates that would not cause an additional delivery. At least one
1388 person was confused, thinking that -bt output corresponded to deliveries.
1389 (Suppressing duplicates isn't a good idea as you lose the information
1390 about possibly different redirections that led to the duplicates.)
1392 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1393 systems where poll() doesn't work, in particular OS X.
1395 PH/10 Added more information to debugging output for retry time not reached.
1397 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1398 operations in malware.c.
1400 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1403 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1404 syslog_duplication set false, log lines that would normally be written
1405 both the the main log and to the reject log were not written to syslog at
1408 PH/14 In the default configuration, change the use of "message" in ACL warn
1409 statements to "add_header".
1411 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1412 not followed by a command (e.g. "seen endif").
1414 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1415 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1418 PH/17 Added extra conditions to the default value of delay_warning_condition
1422 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1423 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1424 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1427 The Auto-Submitted: and various List- headers are standardised, whereas I
1428 don't think Precedence: ever was.
1430 PH/18 Refactored debugging code in route_finduser() to show more information,
1431 in particular, the error code if getpwnam() issues one.
1433 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1434 This is apparently needed in addition to the PH/07 change above to avoid
1435 any possible encoding problems.
1437 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1438 but not after initializing Perl.
1440 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1441 output them only if debugging. By default they are written stderr,
1442 apparently, which is not desirable.
1444 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1447 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1450 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1452 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1453 authenticated or an ident call has been made. Suppress the default
1454 values for $authenticated_id and $authenticated_sender (but permit -oMai
1455 and -oMas) when testing with -bh.
1457 PH/24 Re-jigged the order of the tests in the default configuration so that the
1458 tests for valid domains and recipients precede the DNS black list and CSA
1459 tests, on the grounds that those ones are more expensive.
1461 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1462 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1463 This bug exists in every version of Exim that I still have, right back to
1466 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1467 However, an attempt to turn on case-sensitivity in a regex key by
1468 including (?-i) didn't work because the subject string was already
1469 lowercased, and the effects were non-intuitive. It turns out that a
1470 one-line patch can be used to allow (?-i) to work as expected.
1476 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1477 other effects) broke the use of negated acl sub-conditions.
1479 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1482 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1483 "Deny" causes Exim to reject the incoming connection with a 554 error.
1484 Unfortunately, if there is a major crisis, such as a disk failure,
1485 tcp-wrappers gives "deny", whereas what one would like would be some
1486 kind of temporary error. A kludge has been added to help with this.
1487 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1488 554 error is used if errno is still zero or contains ENOENT (which occurs
1489 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1492 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1494 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1495 errors. Otherwise a message that provokes a temporary error (when other
1496 messages do not) can cause a whole host to time out.
1498 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1499 addresses were routed directly to files or pipes from a redirect router.
1500 File deliveries just didn't batch; pipe deliveries might have suffered
1503 PH/06 A failure to get a lock for a hints database would erroneously always say
1504 "Failed to get write lock", even when it was really a read lock.
1506 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1507 of 0600. This has been changed to use the value of the lockfile_mode
1508 option (which defaults to 0600).
1510 PH/08 Applied small patch from the Sieve maintainer.
1512 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1513 folder from quota calculations, a direct delivery into this folder messed
1514 up the contents of the maildirsize file. This was because the regex was
1515 used only to exclude .Trash (or whatever) when the size of the mailbox
1516 was calculated. There was no check that a delivery was happening into an
1517 excluded directory. This bug has been fixed by ignoring all quota
1518 processing for deliveries into excluded directories.
1520 PH/10 Added the maildirfolder_create_regex option to appendfile.
1526 PH/01 The code for finding all the local interface addresses on a FreeBSD
1527 system running IPv6 was broken. This may well have applied to all BSD
1528 systems, as well as to others that have similar system calls. The broken
1529 code found IPv4 interfaces correctly, but gave incorrect values for the
1530 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1531 that it would not match correctly against @[] and not recognize the IPv6
1534 PH/02 The ipliteral router was not recognizing addresses of the form user@
1535 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1537 PH/03 Added disable_ipv6.
1539 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1540 decoded form, because it is most often used to construct To: headers
1541 lines in autoreplies, and the decoded form may well be syntactically
1542 invalid. However, $reply_address has leading white space removed, and all
1543 newlines turned into spaces so that the autoreply transport does not
1546 PH/05 If group was specified without a user on a router, and no group or user
1547 was specified on a transport, the group from the router was ignored.
1549 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1550 for visible compile-time settings that can be used to change these
1551 numbers, for those that want even more. Backwards compatibility with old
1552 spool files has been maintained. However, going back to a previous Exim
1553 release will lost any variables that are in spool files.
1555 PH/07 Two small changes when running in the test harness: increase delay when
1556 passing a TCP/IP connection to a new process, in case the original
1557 process has to generate a bounce, and remove special handling of
1558 127.0.0.2 (sic), which is no longer necessary.
1560 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1561 be the same on different OS.
1563 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1566 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1567 whether --show-vars was specified or not
1569 JJ/02 exipick: Added support for new ACL variable spool format introduced
1572 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1573 syntactically invalid From: or Reply-to: line, and a filter used this to
1574 generate an autoreply, and therefore failed to obtain an address for the
1575 autoreply, Exim could try to deliver to a non-existent relative file
1576 name, causing unrelated and misleading errors. What now happens is that
1577 it logs this as a hard delivery error, but does not attempt to create a
1580 PH/11 The exinext utility has a -C option for testing purposes, but although
1581 the given file was scanned by exinext itself; it wasn't being passed on
1582 when Exim was called.
1584 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1585 an end-of-file indication when reading a command response.
1587 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1588 compiled. In many other places in Exim, IPv6 addresses are always
1589 recognized, so I have changed this. It also means that IPv4 domain
1590 literals of the form [IPV4:n.n.n.n] are now always recognized.
1592 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1593 used if the router is not running as root, for example, when verifying at
1594 ACL time, or when using -bh. The debugging output from this situation was
1595 non-existent - all you got was a failure to exec. I have made two
1598 (a) Failures to set uid/gid, the current directory, or a process leader
1599 in a subprocess such as that created by queryprogram now generate
1600 suitable debugging ouput when -d is set.
1602 (b) The queryprogram router detects when it is not running as root,
1603 outputs suitable debugging information if -d is set, and then runs
1604 the subprocess without attempting to change uid/gid.
1606 PH/15 Minor change to Makefile for building test_host (undocumented testing
1609 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1610 additional section of a DNS packet that returns MX or SRV records.
1611 Instead, it always explicitly searches for A/AAAA records. This avoids
1612 major problems that occur when a DNS server includes only records of one
1613 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1614 fixed another bug: if SRV records were looked up and the corresponding
1615 address records were *not* found in the additional section, the port
1616 values from the SRV records were lost.
1618 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1619 using the correct key (the original address) when searching the retry
1620 rules in order to find which one to use for generating the retry hint.
1622 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1623 adding the default one. Similarly, if it contains a Reply-To: header, the
1624 errors_reply_to option, if set, is not used.
1626 PH/19 When calculating a retry time, Exim used to measure the "time since
1627 failure" by looking at the "first failed" field in the retry record. Now
1628 it does not use this if it is later than than the arrival time of the
1629 message. Instead it uses the arrival time. This makes for better
1630 behaviour in cases where some deliveries succeed, thus re-setting the
1631 "first failed" field. An example is a quota failure for a huge message
1632 when small messages continue to be delivered. Without this change, the
1633 "time since failure" will always be short, possible causing more frequent
1634 delivery attempts for the huge message than are intended.
1635 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1637 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1638 $1, $2, $3) because the numerical variables can be reset during some
1639 expansion items (e.g. "match"), thereby losing the authentication data.
1641 PH/21 Make -bV show the size of off_t variables so that the test suite can
1642 decide whether to run tests for quotas > 2G.
1644 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1645 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1646 filecount value is greater than 2G or if a quota value is greater than 2G
1647 on a system where the size of off_t is not greater than 4, a panic error
1650 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1651 never match. The debug and -bh output now contains an explicit error
1652 message indicating a malformed IPv4 address or mask.
1654 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1655 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1656 PH/23 above applies.
1658 PH/25 Do not write to syslog when running in the test harness. The only
1659 occasion when this arises is a failure to open the main or panic logs
1660 (for which there is an explicit test).
1662 PH/26 Added the /no_tell option to "control=freeze".
1664 PH/27 If a host name lookup failed very early in a connection, for example, if
1665 the IP address matched host_lookup and the reverse lookup yielded a name
1666 that did not have a forward lookup, an error message of the form "no IP
1667 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1668 could be logged. Now it outputs the IP address instead of "NULL".
1670 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1671 allows the sender and the authenticated sender to be set when
1672 submitting a message from within Exim. Since child_open_exim() is
1673 documented for local_scan(), the new function should be too.
1675 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1676 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1677 results in an empty string is now treated as unset.
1679 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1681 PH/31 Added sender_verify_fail logging option.
1683 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1684 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1685 tidied the source and removed it altogether.
1687 PH/33 When a queue run was abandoned because the load average was too high, a
1688 log line was always written; now it is written only if the queue_run log
1689 selector is set. In addition, the log line for abandonment now contains
1690 information about the queue run such as the pid. This is always present
1691 in "start" and "stop" lines but was omitted from the "abandon" line.
1693 PH/34 Omit spaces between a header name and the colon in the error message that
1694 is given when verify = headers_syntax fails (if there are lots of them,
1695 the message gets confusing).
1697 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1698 names, as there are now some PTR records that contain slashes. This check
1699 is only to protect against broken name servers that fall over on strange
1700 characters, so the fact that it applies to all lookups doesn't matter.
1702 PH/36 Now that the new test suite is complete, we can remove some of the
1703 special code in Exim that was needed for the old test suite. For example,
1704 sorting DNS records because real resolvers return them in an arbitrary
1705 order. The new test suite's fake resolver always returns records in the
1708 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1709 bounces) except when queue_only is set, to avoid logging races between
1710 the different processes.
1712 PH/38 Panic-die if .include specifies a non-absolute path.
1714 PH/39 A tweak to the "H" retry rule from its user.
1716 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1717 a label. They prevented compilation on older perls.
1719 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1720 a warning to be raised on newish perls.
1722 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1723 on queue. Changes to match documented behaviour of showing count of
1724 messages matching specified criteria.
1726 PH/40 Changed the default ident timeout from 30s to 5s.
1728 PH/41 Added support for the use of login_cap features, on those BSD systems
1729 that have them, for controlling the resources used by pipe deliveries.
1731 PH/42 The content-scanning code uses fopen() to create files in which to put
1732 message data. Previously it was not paying any attention to the mode of
1733 the files. Exim runs with umask(0) because the rest of the code creates
1734 files with open(), and sets the required mode explicitly. Thus, these
1735 files were ending up world-writeable. This was not a big issue, because,
1736 being within the spool directory, they were not world-accessible. I have
1737 created a function called modefopen, which takes an additional mode
1738 argument. It sets umask(777), creates the file, chmods it to the required
1739 mode, then resets the umask. All the relevant calls to fopen() in the
1740 content scanning code have been changed to use this function.
1742 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1743 to 24 hours. This avoids potential overflow problems when processing G
1744 and H retry rules. I suspect nobody ever tinkers with this value.
1746 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1748 PH/45 When the plaintext authenticator is running as a client, the server's
1749 challenges are checked to ensure they are valid base64 strings. By
1750 default, the authentication attempt is cancelled if an invalid string is
1751 received. Setting client_ignore_invalid_base64 true ignores these errors.
1752 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1753 they are received. Thus, the responses can be made to depend on the
1754 challenges. If an invalid string is ignored, an empty string is placed in
1757 PH/46 Messages that are created by the autoreply transport now contains a
1758 References: header, in accordance with RFCs 2822 and 3834.
1760 PH/47 Added authenticated_sender_force to the smtp transport.
1762 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1764 PH/49 Installed latest patch from the Sieve maintainer.
1766 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1767 was also set, the appendfile transport was unnecessarily scanning a
1768 directory of message files (e.g. for maildir delivery) to find the count
1769 of files (along with the size), even though it did not need this
1770 information. It now does the scan only if it needs to find either the
1771 size of the count of files.
1773 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1775 PH/52 Two bugs concerned with error handling when the smtp transport is
1778 (i) Exim was not creating retry information for temporary errors given
1779 for individual recipients after the DATA command when the smtp transport
1780 was used in LMTP mode. This meant that they could be retried too
1781 frequently, and not timed out correctly.
1783 (ii) Exim was setting the flag that allows error details to be returned
1784 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1785 recipients that were returned after the DATA command.
1787 PH/53 This is related to PH/52, but is more general: for any failing address,
1788 when detailed error information was permitted to be returned to the
1789 sender, but the error was temporary, then after the final timeout, only
1790 "retry timeout exceeded" was returned. Now it returns the full error as
1791 well as "retry timeout exceeded".
1793 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1794 do this, and (what is worse) MTAs that accept it.
1796 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1797 will now be deprecated.
1799 PH/56 New os.c-cygwin from the Cygwin maintainer.
1801 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1802 formats (previously only available in exim formats via -bpr, -bpru,
1803 and -bpra. Now also available in native and exiqgrep formats)
1805 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1806 with very large, slow to parse queues
1808 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1810 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1812 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1813 responses to authentication challenges, though it was showing the
1814 challenges; (ii) I've removed the CR characters from the debug output for
1817 PH/58 Allow for the insertion of a newline as well as a space when a string
1818 is turned into more than one encoded-word during RFC 2047 encoding. The
1819 Sieve code now uses this.
1821 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1822 data_4xx, lost_connection, tls_required.
1824 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1825 message was being sent as an SMTP response.
1827 PH/61 Add -l and -k options to exicyclog.
1829 PH/62 When verifying, if an address was redirected to one new address, so that
1830 verification continued, and the new address failed or deferred after
1831 having set something in $address_data, the value of $address_data was not
1832 passed back to the ACL. This was different to the case when no
1833 redirection occurred. The value is now passed back in both cases.
1835 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1836 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1837 use login_cap.h, so on its own it isn't the distinguishing feature. The
1838 new name refers directly to the setclassresources() function.
1840 PH/65 Added configuration files for NetBSD3.
1842 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1844 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1845 is preferred over IPv4.
1847 PH/68 The bounce_return_message and bounce_return_body options were not being
1848 honoured for bounces generated during the reception of non-SMTP messages.
1849 In particular, this applied to messages rejected by the ACL. This bug has
1850 been fixed. However, if bounce_return_message is true and bounce_return_
1851 body is false, the headers that are returned for a non-SMTP message
1852 include only those that have been read before the error was detected.
1853 (In the case of an ACL rejection, they have all been read.)
1855 PH/69 The HTML version of the specification is now built in a directory called
1856 spec_html instead of spec.html, because the latter looks like a path with
1857 a MIME-type, and this confuses some software.
1859 PH/70 Catch two compiler warnings in sieve.c.
1861 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1862 function verify_get_ident() calls ip_connect() to connect a socket, but
1863 if the "connect()" function timed out, ip_connect() used to close the
1864 socket. However, verify_get_ident() also closes the socket later, and in
1865 between Exim writes to the log, which may get opened at this point. When
1866 the socket was closed in ip_connect(), the log could get the same file
1867 descriptor number as the socket. This naturally causes chaos. The fix is
1868 not to close the socket in ip_connect(); the socket should be closed by
1869 the function that creates it. There was only one place in the code where
1870 this was missing, in the iplookup router, which I don't think anybody now
1871 uses, but I've fixed it anyway.
1873 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1874 well as to direct DNS lookups. Otherwise the handling of names in host
1875 lists is inconsistent and therefore confusing.
1881 PH/01 Two changes to the default runtime configuration:
1883 (1) Move the checks for relay_from_hosts and authenticated clients from
1884 after to before the (commented out) DNS black list checks.
1886 (2) Add control=submission to the relay_from_hosts and authenticated
1887 clients checks, on the grounds that messages accepted by these
1888 statements are most likely to be submissions.
1890 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1892 (1) Generate an error if the third argument for the ${prvs expansion is
1895 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1898 (3) Reset the variables that are obtained from the first argument of
1899 ${prvscheck and used in the second argument before leaving the code,
1900 because their memory is reclaimed, so using them afterwards may do
1903 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1904 one (it's much easier than Tom thought :-).
1906 (5) Because of (4), we can now allow for the use of $prvscheck_result
1907 inside the third argument.
1909 PH/03 For some reason, the default setting of PATH when running a command from
1910 a pipe transport was just "/usr/bin". I have changed it to
1913 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1914 anything to be listed in the output from -bV.
1916 PH/05 When a filter generated an autoreply, the entire To: header line was
1917 quoted in the delivery log line, like this:
1919 => >A.N.Other <ano@some.domain> <original@ddress> ...
1921 This has been changed so that it extracts the operative address. There
1922 may be more than one such address. If so, they are comma-separated, like
1925 => >ano@some.domain,ona@other.domain <original@ddress> ...
1927 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1928 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1929 not being looked up in the rDNS to get a host name, Exim was showing the
1930 IP address twice in Received: lines, even though the IP addresses were
1931 identical. For example:
1933 Received: from [1.2.3.4] (helo=[1.2.3.4])
1935 However, if the real host name was known, it was omitting the HELO data
1936 if it matched the actual IP address. This has been tidied up so that it
1937 doesn't show the same IP address twice.
1939 PH/07 When both +timestamp and +memory debugging was on, the value given by
1940 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1941 called by the debug printing, thereby overwriting the timestamp buffer.
1942 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1944 PH/08 When the original message was included in an autoreply transport, it
1945 always said "this is a copy of the message, including all the headers",
1946 even if body_only or headers_only was set. It now gives an appropriate
1949 PH/09 Applied a patch from the Sieve maintainer which:
1951 o fixes some comments
1952 o adds the (disabled) notify extension core
1953 o adds some debug output for the result of if/elsif tests
1954 o points to the current vacation draft in the documentation
1955 and documents the missing references header update
1959 o fixes a bug in processing the envelope test (when testing
1960 multiple envelope elements, the last element determinted the
1963 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1964 Electronic Mail") by including:
1966 Auto-submitted: auto-generated
1968 in the messages that it generates (bounce messages and others, such as
1969 warnings). In the case of bounce messages for non-SMTP mesages, there was
1970 also a typo: it was using "Auto_submitted" (underscore instead of
1971 hyphen). Since every message generated by Exim is necessarily in response
1972 to another message, thes have all been changed to:
1974 Auto-Submitted: auto-replied
1976 in accordance with these statements in the RFC:
1978 The auto-replied keyword:
1980 - SHOULD be used on messages sent in direct response to another
1981 message by an automatic process,
1983 - MUST NOT be used on manually-generated messages,
1985 - MAY be used on Delivery Status Notifications (DSNs) and Message
1986 Disposition Notifications (MDNs),
1988 - MUST NOT be used on messages generated by automatic or periodic
1989 processes, except for messages which are automatic responses to
1992 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1993 to the default Received: header definition.
1995 PH/12 Added log selector acl_warn_skipped (default on).
1997 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1998 variables because (a) they are in the wrong storage pool and (b) even if
1999 they were copied, it wouldn't work properly because of the caching.
2001 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2002 checking when decoding. Apparently there are clients that generate
2003 overlong encoded strings. Why am I not surprised?
2005 PH/15 If the first argument of "${if match_address" was not empty, but did not
2006 contain an "@" character, Exim crashed. Now it writes a panic log message
2007 and treats the condition as false.
2009 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2011 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2012 extension "envelope-auth". The code is finished and in agreement with
2013 other implementations, but there is no documentation so far and in fact,
2014 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2015 not changing the active code.
2017 Print executed "if" and "elsif" statements when debugging is used. This
2018 helps a great deal to understand what a filter does.
2020 Document more things not specified clearly in RFC3028. I had all this
2021 sorted out, when out of a sudden new issues came to my mind. Oops."
2023 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2026 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2027 canonical form (as documented). However, after a host name lookup from
2028 the IP address, check_host() was doing a simple string comparison with
2029 addresses acquired from the DNS when checking that the found name did
2030 have the original IP as one of its addresses. Since any found IPv6
2031 addresses are likely to be in abbreviated form, the comparison could
2032 fail. Luckily, there already exists a function for doing the comparison
2033 by converting both addresses to binary, so now that is used instead of
2034 the text comparison.
2036 PH/20 There was another similar case to PH/19, when a complete host name was
2037 given in a host list; looking up its IP address could give an abbreviated
2038 form, whereas the current host's name might or might not be abbreviated.
2039 The same fix has been applied.
2045 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2046 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2049 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2050 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2052 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2054 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2055 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2056 Also, for "Auto-Submitted", treat anything other than "no" as
2057 non-personal, in accordance with RFC 3834. (Previously it treated
2058 anything starting "auto-" as non-personal.)
2060 TF/01 The control=submission/name=... option had a problem with syntax
2061 errors if the name included a slash character. The /name= option
2062 now slurps the rest of the string, so it can include any characters
2063 but it must come last in the list of options (after /sender_retain
2066 PH/05 Some modifications to the interface to the fake nameserver for the new
2074 TK/01 Added the "success_on_redirect" address verification option. See
2075 NewStuff for rationale and an example.
2077 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2079 PH/02 Patch to exigrep to allow it to work on syslog lines.
2081 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2082 fread() to skip over the body file's header line, because in Cygwin the
2083 header line is locked and is inaccessible.
2085 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2086 co-exist for some time) to make it clear that it is the Exim ID that is
2087 referenced, not the Message-ID: header line.
2089 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2090 string_format() function, because snprintf() does not exist on all
2093 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2094 ${stat: expansion item.
2096 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2097 protocol synchronization error", to keep the pedants happy.
2099 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2100 well as for IRIX systems, when gcc is being used. See the host.c source
2103 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2105 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2108 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2109 transport and to the smtp transport in LMTP mode.
2111 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2113 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2114 run a filter in a subprocess. This could lead to confusion in subsequent
2115 lookups in the parent process. There should also be a search_tidyup() at
2116 the end of the subprocess.
2118 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2119 only if the host matched helo_try_verify_hosts, which caused the
2120 verification to occur when the EHLO/HELO command was issued. The ACL just
2121 tested the remembered result. Now, if a previous verification attempt has
2122 not happened, "verify = helo" does it there and then.
2124 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2126 TK/03 Fix log output including CR from clamd.
2128 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2129 exist provoked a memory error which could cause a segfault.
2131 PH/15 Installed PCRE 6.2
2133 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2135 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2136 of the problem. Specifically, suggested +O2 rather than +O1 for the
2139 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2141 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2142 record, the port was not correctly logged when the outgoing_port log
2143 selector was set (it logged the transort's default port).
2145 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2146 fallback_hosts, and "hosts" in the smtp transport.
2148 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2149 host errors such as "Connection refused".
2151 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2152 authentication with radiusclient 0.4.9:
2154 - Error returned from rc_read_config was caught wrongly
2155 - Username/password not passed on to radius server due to wrong length.
2157 The presumption is that some radiusclient API changes for 4.51/PH/17
2158 were not taken care of correctly. The code is still untested by me (my
2159 Linux distribution still has 0.3.2 of radiusclient), but it was
2160 contributed by a Radius user.
2162 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2163 expanding the "port" option of the smtp transport.
2165 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2166 while reading a MIME header. Thanks to Tom Hughes for a patch.
2168 PH/24 Include config.h inside local_scan.h so that configuration settings are
2171 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2172 that in an ACL for RCPT (for example), you can examine exactly what was
2175 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2176 commands, but it was not correctly comparing the address with the actual
2177 client host address. Thus, it would show the EHLO address in Received:
2178 header lines when this was not necessary.
2180 PH/27 Added the % operator to ${eval:}.
2182 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2183 it should be ignoring failures (because with -C, for example, it has lost
2184 privilege). It wasn't ignoring creation failures other than "already
2187 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2190 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2191 because an input line was too long, either on its own, or by virtue of
2192 too many continuations, the temporary file was not being removed, and the
2193 return code was incorrect.
2195 PH/31 Missing "BOOL" in function definition in filtertest.c.
2197 PH/32 Applied Sieve patches from the maintainer.
2199 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2201 PH/33 Added "verify = not_blind".
2203 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2204 Local/Makefile (with some defaults set). These are used in built scripts
2205 such as exicyclog, but they have never been used in the exim_install
2206 script (though there are many overriding facilities there). I have
2207 arranged that the exim_install script now takes note of these two
2210 PH/35 Installed configuration files for Dragonfly.
2212 PH/36 When a locally submitted message by a trusted user did not contain a
2213 From: header, and the sender address was obtained from -f or from an SMTP
2214 MAIL command, and the trusted user did not use -F to supply a sender
2215 name, $originator_name was incorrectly used when constructing a From:
2216 header. Furthermore, $originator_name was used for submission mode
2217 messages from external hosts without From: headers in a similar way,
2218 which is clearly wrong.
2220 PH/37 Added control=suppress_local_fixups.
2222 PH/38 When log_selector = +received_sender was set, and the addition of the
2223 sender made the log line's construction buffer exactly full, or one byte
2224 less than full, an overflow happened when the terminating "\n" was
2227 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2228 when the result of a list match is failure because a DNS lookup failed.
2230 PH/40 RM_COMMAND is now used in the building process.
2232 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2233 the "build-* directories that it finds.
2235 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2236 address in a domain literal was a prefix of an interface address.
2238 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2239 when verifying a sender address, unless rewrite_headers is false.
2241 PH/44 Wrote a long comment about why errors_to addresses are verified as
2242 recipients, not senders.
2244 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2245 the ratelimit ACL was added.
2247 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2249 PH/46 Added extra information about PostgreSQL errors to the error string.
2251 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2252 avoiding the need to install special zones in a real server. This is
2253 backwards compatible; if it can't find the fake resolver, it drops back.
2254 Thus, both old and new test suites can be run.
2256 TF/02 Added util/ratelimit.pl
2258 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2259 clock is set back in time.
2261 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2262 Candler <B.Candler@pobox.com>.
2264 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2265 OK for addresses that are the result of redirections.
2267 PH/48 A number of further additions for the benefit of the new test suite,
2268 including a fake gethostbyname() that interfaces to the fake DNS resolver
2271 TF/06 The fix for widen_domains has also been applied to qualify_single and
2272 search_parents which are the other dnslookup options that can cause
2275 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2278 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2280 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2281 service" if it encountered an MX record with an empty target hostname.
2282 The message is now "an MX or SRV record indicated no SMTP service".
2284 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2285 if the DNS of the sending site is misconfigured. This is quite a
2286 common situation. This change restores the behaviour of treating a
2287 helo verification defer as a failure.
2289 PH/51 If self=fail was set on a router, the bounce message did not include the
2290 actual error message.
2296 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2298 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2299 command itself ended in error, the underlying message about the transport
2300 filter timeout was being overwritten with the pipe command error. Now the
2301 underlying error message should be appended to the second error message.
2303 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2305 PH/02 Reduce the amount of output that "make" produces by default. Full output
2306 can still be requested.
2308 PH/03 The warning log line about a condition test deferring for a "warn" verb
2309 was being output only once per connection, rather than after each
2310 occurrence (because it was using the same function as for successful
2311 "warn" verbs). This seems wrong, so I have changed it.
2313 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2314 it should not have, which might have caused a crash in the right
2315 circumstances, but probably never did.
2317 PH/04 Installed a modified version of Tony Finch's patch to make submission
2318 mode fix the return path as well as the Sender: header line, and to
2319 add a /name= option so that you can make the user's friendly name appear
2322 TF/03 Added the control = fakedefer ACL modifier.
2324 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2325 Mark Lowes for thorough testing.
2327 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2329 TK/03 Merged latest SRS patch from Miles Wilton.
2331 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2332 with the definition in sysexits.h (which is #included earlier).
2333 Fortunately, Exim does not actually use EX_OK. The code used to try to
2334 preserve the sysexits.h value, by assumimg that macro definitions were
2335 scanned for macro replacements. I have been disabused of this notion,
2336 so now the code just undefines EX_OK before #including unistd.h.
2338 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2339 in the smtp transport. When a block could not be written in a single
2340 write() function, the timeout was being re-applied to each part-write.
2341 This seems wrong - if the receiver was accepting one byte at a time it
2342 would take for ever. The timeout is now adjusted when this happens. It
2343 doesn't have to be particularly precise.
2345 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2346 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2348 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2349 without a domain if the check to <postmaster@domain> fails.
2351 SC/01 Eximstats: added -xls and the ability to specify output files
2352 (patch written by Frank Heydlauf).
2354 SC/02 Eximstats: use FileHandles for outputing results.
2356 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2358 SC/04 Eximstats: fixed display of large numbers with -nvr option
2360 SC/05 Eximstats: fixed merging of reports with empty tables.
2362 SC/06 Eximstats: added the -include_original_destination flag
2364 SC/07 Eximstats: removed tabs and trailing whitespace.
2366 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2368 TK/06 MBOX spool code: Add real "From " MBOX separator line
2369 so the .eml file is really in mbox format (even though
2370 most programs do not really care). Patch from Alex Miller.
2372 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2373 The latter is generated from $received_to and is only set if the
2374 message has one envelope recipient. SA can use these headers,
2375 obviously out-of-the-box. Patch from Alex Miller.
2377 PH/08 The ${def test on a variable was returning false if the variable's
2378 value was "0", contrary to what the specification has always said!
2379 The result should be true unless the variable is empty.
2381 PH/09 The syntax error of a character other than { following "${if
2382 def:variable_name" (after optional whitespace) was not being diagnosed.
2383 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2384 accidental colon was present, for example, could give incorrect results.
2386 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2387 result is used (not including appendfile, where other changes are about
2390 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2391 This involved changing a lot of size variables from int to off_t. It
2392 should work with maildirs and everything.
2394 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2395 spamd dying while we are connected to it.
2397 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2400 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2401 function for BDB 4.3.
2403 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2405 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2406 the sources for PCRE have been re-arranged and more files are now
2409 PH/15 The code I had for printing potentially long long variables in PH/11
2410 above was not the best (it lost precision). The length of off_t variables
2411 is now inspected at build time, and an appropriate printing format (%ld
2412 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2413 to be "long long int" or "long int". This is needed for the internal
2414 formatting function string_vformat().
2416 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2417 the configuration file to be ":syslog", then the script "guesses" where
2418 the logs files are, rather than using the compiled in default. In our
2419 case the guess is not the same as the compiled default, so the script
2420 suddenly stopped working when I started to use syslog. The patch checks
2421 to see if log_file_path is "". If so, it attempts to read it from exim
2422 with no configuration file to get the compiled in version, before it
2423 falls back to the previous guessing code."
2425 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2426 implementing BATV in an Exim configuration. See NewStuff for the gory
2429 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2430 Makefile that are specific to HP-UX.
2432 PH/18 If the "use_postmaster" option was set for a recipient callout together
2433 with the "random" option, the postmaster address was used as the MAIL
2434 FROM address for the random test, but not for the subsequent recipient
2435 test. It is now used for both.
2437 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2438 patch removes a few documentation additions to RFC 3028, because the
2439 latest draft now contains them. It adds the new en;ascii-case comparator
2440 and a new error check for 8bit text in MIME parts. Comparator and
2441 require names are now matched exactly. I enabled the subaddress
2442 extension, but it is not well tested yet (read: it works for me)."
2444 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2445 rework some of the code of TK/09 above to avoid the hardwired use of
2446 "%lld" and "long long". Replaced the call to snprintf() with a call to
2449 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2450 records point to non-existent hosts", "retry timeout exceeded", and
2451 "retry time not reached for any host after a long failure period".
2453 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2454 experimental DomainKeys support:
2456 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2457 (2) On an error such as an illegally used "control", the wrong name for
2458 the control was given.
2460 These problems did NOT occur unless DomainKeys support was compiled.
2462 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2464 PH/24 Added ${if match_ip condition.
2466 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2467 databases so that it will be absolutely obvious if a crash occurs in the
2468 DB library. This is a regular occurrence (often caused by mis-matched
2471 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2472 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2473 picked up on a user's system that detects such things. There doesn't seem
2474 to be a gcc warning option for this - only an attribute that has to be
2475 put on the function's prototype. It seems that in Fedora Core 4 they have
2476 set this on a number of new functions. No doubt there will be more in due
2479 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2480 specify a transport. However, if an address that was verified by such a
2481 router was the subject of a callout, Exim crashed because it tried to
2482 read the rcpt_include_affixes from the non-existent transport. Now it
2483 just assumes that the setting of that option is false. This bug was
2484 introduced by 4.51/PH/31.
2486 PH/28 Changed -d+all to exclude +memory, because that information is very
2487 rarely of interest, but it makes the output a lot bigger. People tend to
2488 do -d+all out of habit.
2490 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2491 code in os-type was giving problems when libc.so lives in lib64, like on
2494 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2495 aren't the modern standard, and it seems that some systems' include files
2496 don't always have them. Exim was already checking for some of the newer
2497 ones like T_AAAA, and defining it itself. I've added checks for all the
2498 record types that Exim uses.
2500 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2501 not automatically generating a new one, as it is supposed to. This
2502 prevented TLS from working. If the file did exist, but contained invalid
2503 data, a new version was generated, as expected. It was only the case of a
2504 non-existent file that was broken.
2506 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2507 with a change in libdomainkeys > 0.64.
2509 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2510 from DNS. If the selector record carries the flag, it now has
2511 precedence over the domain-wide flag.
2513 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2515 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2516 the use of a port name that isn't defined in /etc/services) occurred, the
2517 message was deferred as in a normal delivery, and thus remained on the
2518 spool, instead of being failed because of the mua_wrapper setting. This
2519 is now fixed, and I tidied up some of the mua_wrapper messages at the
2522 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2523 the messages in a hash of arrays rather than using individual hashes.
2524 This is a bit cleaner and results in dramatic memory savings, albeit
2525 at a slight CPU cost.
2527 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2528 as requested by Marc Sherman.
2530 SC/10 Eximstats: added histograms for user specified patterns as requested
2533 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2535 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2536 fopen() in the content-scanning modules that did not already have it.
2542 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2543 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2545 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2547 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2549 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2550 to test Sieve filters that use "vacation".
2552 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2553 that changes the way the GnuTLS parameters are stored in the cache file.
2554 The new format can be generated externally. For backward compatibility,
2555 if the data in the cache doesn't make sense, Exim assumes it has read an
2556 old-format file, and it generates new data and writes a new file. This
2557 means that you can't go back to an older release without removing the
2560 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2561 work if there are any delivery delays because "one_time" forces the
2562 parent to be marked "delivered", so its unseen clone is never tried
2563 again. For this reason, Exim now forbids the simultaneous setting of
2566 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2567 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2568 entry if you want to know the details. The fix, however, neglected to
2569 consider the case when local delivery batching is involved. The test for
2570 "previously delivered" was not happening when checking to see if an
2571 address could be batched with a previous (undelivered) one; under
2572 certain circumstances this could lead to multiple deliveries to the same
2575 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2576 in its include files, and this causes problems building Exim.
2578 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2579 header_syntax) but Exim was just ignoring anything given after a slash.
2580 In particular, this caused confusion with an attempt to use "verify =
2581 reverse_host_lookup/defer_ok". An error is now given when options are
2582 supplied for verify items that do not have them. (Maybe reverse_host_
2583 lookup should have a defer_ok option, but that's a different point.)
2585 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2586 defined by RFC 821) to 2048, because there were problems with some AUTH
2587 commands, and RFC 1869 says the size should be increased for extended
2588 SMTP commands that take arguments.
2590 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2593 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2594 "unknown" error; now it says that the functionality isn't in the binary.
2596 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2597 an address' error message when a string expansion fails (syntax or
2598 whatever). Otherwise the password may appear in the log. Following change
2599 PH/42 below, there is no longer a chance of it appearing in a bounce
2602 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2604 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2605 of its addresses was ever tried. (Bugzilla bug #2.)
2607 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2608 the result incorrectly in the debug output. (It correctly added a newline
2609 to what was transported.)
2611 TF/01 Added $received_time.
2613 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2614 commented out examples of how to interface to a virus scanner and to
2615 SpamAssassin. Also added commented examples of av_scanner and
2616 spamd_address settings.
2618 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2619 and controls are allowed in which ACLs. There were a couple of minor
2620 errors. Some of the entries in the conditions table (which is a table of
2621 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2622 negation of where the condition IS allowed.
2624 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2626 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2627 header file does not have a version number, so I've had to invent a new
2628 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2629 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2630 radiusclient), but it was contributed by a Radius user.
2632 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2633 files or directories, for OpenSSL.
2635 PH/19 When an Exim process that is running as root has to create an Exim log
2636 file, it does so in a subprocess that runs as exim:exim so as to get the
2637 ownership right at creation (otherwise, other Exim processes might see
2638 the file with the wrong ownership). There was no test for failure of this
2639 fork() call, which would lead to the process getting stuck as it waited
2640 for a non-existent subprocess. Forks do occasionally fail when resources
2641 run out. I reviewed all the other calls to fork(); they all seem to check
2644 PH/20 When checking for unexpected SMTP input at connect time (before writing
2645 the banner), Exim was not dealing correctly with a non-positive return
2646 from the read() function. If the client had disconnected by this time,
2647 the result was a log entry for a synchronization error with an empty
2648 string after "input=" when read() returned zero. If read() returned -1
2649 (an event I could not check), uninitialized data bytes were printed.
2650 There were reports of junk text (parts of files, etc) appearing after
2653 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2655 PH/22 Added support for macro redefinition, and (re)definition in between
2656 driver and ACL definitions.
2658 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2659 forgetting to use the resulting value; it was using the unexpanded value.
2661 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2662 hadn't been configured. The fix is from Juergen Kreileder, who
2663 understands it better than I do:
2665 "Here's what I see happening with three configured cyrus_sasl
2666 authenticators configured (plain, login, cram-md5):
2668 On startup auth_cyrus_sasl_init() gets called for each of these.
2669 This means three calls to sasl_listmech() without a specified mech_list.
2670 => SASL tests which mechs of all available mechs actually work
2671 => three warnings about OTP not working
2672 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2674 With the patch, sasl_listmech() also gets called three times. But now
2675 SASL's mech_list option is set to the server_mech specified in the the
2676 authenticator. Or in other words, the answer from sasl_listmech()
2677 gets limited to just the mech you're testing for (which is different
2679 => the return list contains just 'plain' or 'login', 'cram-md5' or
2680 nothing depending on the value of ob->server_mech.
2682 I've just tested the patch: Authentication still works fine,
2683 unavailable mechs specified in the exim configuration are still
2684 caught, and the auth.log warnings about OTP are gone."
2686 PH/25 When debugging is enabled, the contents of the command line are added
2687 to the debugging output, even when log_selector=+arguments is not
2690 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2691 answer is "GNU", and only if the return is "GNU/something" is the answer
2694 PH/27 $acl_verify_message is now set immediately after the failure of a
2695 verification in an ACL, and so is available in subsequent modifiers. In
2696 particular, the message can be preserved by coding like this:
2698 warn !verify = sender
2699 set acl_m0 = $acl_verify_message
2701 Previously, $acl_verify_message was set only while expanding "message"
2702 and "log_message" when a very denied access.
2704 PH/28 Modified OS/os.c-Linux with
2706 -#ifndef OS_LOAD_AVERAGE
2707 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2709 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2710 nomenclature these days.)
2712 PH/29 Installed patch from the Sieve maintainer that adds the options
2713 sieve_useraddress and sieve_subaddress to the redirect router.
2715 PH/30 In these circumstances:
2716 . Two addresses routed to the same list of hosts;
2717 . First host does not offer TLS;
2718 . First host accepts first address;
2719 . First host gives temporary error to second address;
2720 . Second host offers TLS and a TLS session is established;
2721 . Second host accepts second address.
2722 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2723 and peerdn, if requested) that were in fact used only for the second
2726 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2727 attention to any local part prefix or suffix that was matched by the
2728 router that accepted the address. It now behaves in the same way as it
2729 does for delivery: the affixes are removed from the local part unless
2730 rcpt_include_affixes is set on the transport.
2732 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2733 timeout during the DATA phase of an incoming message.
2735 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2736 applied a patch sanctioned by the Sieve maintainer.
2738 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2739 the uid or gid is negative. A case of a negative gid caused this to be
2740 noticed. The fix allows for either to be negative.
2742 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2743 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2746 PH/36 The change PH/12 above was broken. Fixed it.
2748 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2749 the grounds that routing the same address twice would always produce the
2750 same answer. This might have been true once, but it is certainly no
2751 longer true now. Routing a child address may depend on the previous
2752 routing that produced that child. Some complicated redirection strategies
2753 went wrong when messages had multiple recipients, and made Exim's
2754 behaviour dependent on the order in which the addresses were given.
2756 I have moved the duplicate checking until after the routing is complete.
2757 Exim scans the addresses that are assigned to local and remote
2758 transports, and removes any duplicates. This means that more work will be
2759 done, as duplicates will always all be routed, but duplicates are
2760 presumably rare, so I don't expect this is of any significance.
2762 For deliveries to pipes, files, and autoreplies, the duplicate checking
2763 still happens during the routing process, since they are not going to be
2766 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2767 It corrects a timeout issue with spamd. This is Ian's comment: "The
2768 background is that sometimes spamd either never reads data from a
2769 connection it has accepted, or it never writes response data. The exiscan
2770 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2771 blindly assumes that writes won't block so it may never time out."
2773 PH/39 Allow G after quota size as well as K and M.
2775 PH/40 The value set for $authenticated_id in an authenticator may not contain
2776 binary zeroes or newlines because the value is written to log lines and
2777 to spool files. There was no check on this. Now the value is run through
2778 the string_printing() function so that such characters are converted to
2779 printable escape sequences.
2781 PH/41 $message_linecount is a new variable that contains the total number of
2782 lines in the message. Compare $body_linecount, which is the count for the
2785 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2786 bounce and delay warning messages, except in certain special cases, which
2789 (a) An SMTP error message from a remote host;
2790 (b) A message specified in a :fail: redirection;
2791 (c) A message specified in a "fail" command in a system filter;
2792 (d) A message specified in a FAIL return from the queryprogram router;
2793 (e) A message specified by the cannot_route_message router option.
2795 In these cases only, Exim does include the error details in bounce and
2796 warning messages. There are also a few cases where bland messages such
2797 as "unrouteable address" or "local delivery error" are given.
2799 PH/43 $value is now also set for the "else" part of a ${run expansion.
2801 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2802 being worked on, but at least Exim now implements the latest version to
2805 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2806 process to complete was treated as a delivery failure, a timeout while
2807 writing the message to the pipe was logged, but erroneously treated as a
2808 successful delivery. Such timeouts include transport filter timeouts. For
2809 consistency with the overall process timeout, these timeouts are now
2810 treated as errors, giving rise to delivery failures by default. However,
2811 there is now a new Boolean option for the pipe transport called
2812 timeout_defer, which, if set TRUE, converts the failures into defers for
2813 both kinds of timeout. A transport filter timeout is now identified in
2816 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2817 systems where "make" and "gmake" are different, calling "gmake" at top
2818 level broke things. I've arranged for the value of $(MAKE) to be passed
2819 from the Makefile to this script so that it can call the same version of
2823 A note about Exim versions 4.44 and 4.50
2824 ----------------------------------------
2826 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2827 changes of various kinds. As a consequence, a big documentation update was
2828 needed. This delayed the release for rather longer than seemed good, especially
2829 in the light of a couple of (minor) security issues. Therefore, the changes
2830 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2831 release. So 4.44 and 4.50 are in effect two different branches that both start
2834 I have left the 4.50 change log unchanged; it contains all the changes since
2835 4.43. The change log for 4.44 is below; many of its items are identical to
2836 those for 4.50. This seems to be the most sensible way to preserve the
2837 historical information.
2843 1. Minor wording change to the doc/README.SIEVE file.
2845 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2846 computation of the current number of files was incorrect.
2848 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2849 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2852 4. Give more explanation in the error message when the command for a transport
2853 filter fails to execute.
2855 5. There are several places where Exim runs a non-Exim command in a
2856 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2857 was being done only for the command run by the queryprogram router. It is
2858 now done for all such subprocesses. The other cases are: ${run, transport
2859 filters, and the commands run by the lmtp and pipe transports.
2861 6. Added CONFIGURE_GROUP build-time option.
2863 7. Some older OS have a limit of 256 on the maximum number of file
2864 descriptors. Exim was using setrlimit() to set 1000 as a large value
2865 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2866 systems. I've change it so that if it can't get 1000, it tries for 256.
2868 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2869 was an oversight, and furthermore, ever since the addition of extra
2870 controls (e.g. 4.43/32), the checks on when to allow different forms of
2871 "control" were broken. There should now be diagnostics for all cases when a
2872 control that does not make sense is encountered.
2874 9. Added the /retain_sender option to "control=submission".
2876 10. $recipients is now available in the predata ACL (oversight).
2878 11. Tidy the search cache before the fork to do a delivery from a message
2879 received from the command line. Otherwise the child will trigger a lookup
2880 failure and thereby defer the delivery if it tries to use (for example) a
2881 cached ldap connection that the parent has called unbind on.
2883 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2884 of $address_data from the recipient verification was clobbered by the
2885 sender verification.
2887 13. The value of address_data from a sender verification is now available in
2888 $sender_address_data in subsequent conditions in the ACL statement.
2890 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2892 15. Added a new option "connect=<time>" to callout options, to set a different
2895 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2896 was its contents. (It was OK if the option was not defined at all.)
2898 17. A "Completed" log line is now written for messages that are removed from
2899 the spool by the -Mrm option.
2901 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2902 information about exactly what failed.
2904 19. Added -dd to debug only the daemon process.
2906 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2907 handles timeouts, both on the server side and network timeouts. Renamed the
2908 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2910 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2911 It is now set to "smtps".
2913 22. $host_address is now set to the target address during the checking of
2914 ignore_target_hosts.
2916 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2917 being passed; this would have caused $sender_host_name to have been used if
2918 matching the list had actually called for a host name (not very likely,
2919 since this list is usually IP addresses). A host name is now passed as
2922 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2923 code that specifies a non-restarting handler (typically sigaction() in
2924 modern systems) in an attempt to fix a rare and obscure crash bug.
2926 25. Narrowed the window for a race in the daemon that could cause it to ignore
2927 SIGCHLD signals. This is not a major problem, because they are used only to
2928 wake it up if nothing else does.
2930 26. A malformed maildirsize file could cause Exim to calculate negative values
2931 for the mailbox size or file count. Odd effects could occur as a result.
2932 The maildirsize information is now recalculated if the size or filecount
2935 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2936 support for a long time. Removed HAVE_SYS_VFS_H.
2938 28. Installed the latest version of exipick from John Jetmore.
2940 29. In an address list, if the pattern was not a regular expression, an empty
2941 subject address (from a bounce message) matched only if the pattern was an
2942 empty string. Non-empty patterns were not even tested. This was the wrong
2943 because it is perfectly reasonable to use an empty address as part of a
2944 database query. An empty address is now tested by patterns that are
2945 lookups. However, all the other forms of pattern expect the subject to
2946 contain a local part and a domain, and therefore, for them, an empty
2947 address still always fails if the pattern is not itself empty.
2949 30. Exim went into a mad DNS loop when attempting to do a callout where the
2950 host was specified on an smtp transport, and looking it up yielded more
2951 than one IP address.
2953 31. Re-factored the code for checking spool and log partition space into a
2954 function that finds that data and another that does the check. The former
2955 is then used to implement four new variables: $spool_space, $log_space,
2956 $spool_inodes, and $log_inodes.
2958 32. The RFC2047 encoding function was originally intended for short strings
2959 such as real names; it was not keeping to the 75-character limit for
2960 encoded words that the RFC imposes. It now respects the limit, and
2961 generates multiple encoded words if necessary. To be on the safe side, I
2962 have increased the buffer size for the ${rfc2047: expansion operator from
2965 33. It is now permitted to omit both strings after an "if" condition; if the
2966 condition is true, the result is "true". As before, when the second string
2967 is omitted, a false condition yields an empty string. This makes it less
2968 cumbersome to write custom ACL and router conditions.
2970 34. Failure to deliver a bounce message always caused it to be frozen, even if
2971 there was an errors_to setting on the router. The errors_to setting is now
2974 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2975 canonical form (fully expanded) before being placed in
2976 $sender_host_address.
2978 36. The table in the code that translates DNS record types into text (T_A to
2979 "A" for instance) was missing entries for NS and CNAME. It is just possible
2980 that this could have caused confusion if both these types were looked up
2981 for the same domain, because the text type is used as part of Exim's
2982 per-process caching. But the chance of anyone hitting this buglet seems
2985 37. The dnsdb lookup has been extended in a number of ways.
2987 (1) There is a new type, "zns", which walks up the domain tree until it
2988 finds some nameserver records. It should be used with care.
2990 (2) There is a new type, "mxh", which is like "mx" except that it returns
2991 just the host names, not the priorities.
2993 (3) It is now possible to give a list of domains (or IP addresses) to be
2994 looked up. The behaviour when one of the lookups defers can be
2995 controlled by a keyword.
2997 (4) It is now possible to specify the separator character for use when
2998 multiple records are returned.
3000 38. The dnslists ACL condition has been extended: it is now possible to supply
3001 a list of IP addresses and/or domains to be looked up in a particular DNS
3004 39. Added log_selector=+queue_time_overall.
3006 40. When running the queue in the test harness, wait just a tad after forking a
3007 delivery process, to get repeatability of debugging output.
3009 41. Include certificate and key file names in error message when GnuTLS fails
3010 to set them up, because the GnuTLS error message doesn't include the name
3011 of the failing file when there is a problem reading it.
3013 42. Allow both -bf and -bF in the same test run.
3015 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3017 44. The "Exiscan patch" is now merged into the mainline Exim source.
3019 45. Sometimes the final signoff response after QUIT could fail to get
3020 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3021 < 0 before doing a fflush(). This bug looks as though it goes back to the
3022 introduction of TLS in release 3.20, but "sometimes" must have been rare
3023 because the tests only now provoked it.
3025 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3026 (this can affect the format of dates).
3028 47. exim_tidydb, when checking for the continued existence of a message for
3029 which it has found a message-specific retry record, was not finding
3030 messages that were in split spool directories. Consequently, it was
3031 deleting retry records that should have stayed in existence.
3033 48. Steve fixed some bugs in eximstats.
3035 49. The SPA authentication driver was not abandoning authentication and moving
3036 on to the next authenticator when an expansion was forced to fail,
3037 contradicting the general specification for all authenticators. Instead it
3038 was generating a temporary error. It now behaves as specified.
3040 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3041 (the order specifies the preference for clients). The order is now AES256,
3042 AES128, 3DES, ARCFOUR128.
3044 51. Small patch to Sieve code - explicitly set From: when generating an
3047 52. Exim crashed if a remote delivery caused a very long error message to be
3048 recorded - for instance if somebody sent an entire SpamAssassin report back
3049 as a large number of 550 error lines. This bug was coincidentally fixed by
3050 increasing the size of one of Exim's internal buffers (big_buffer) that
3051 happened as part of the Exiscan merge. However, to be on the safe side, I
3052 have made the code more robust (and fixed the comments that describe what
3055 53. Now that there can be additional text after "Completed" in log lines (if
3056 the queue_time_overall log selector is set), a one-byte patch to exigrep
3057 was needed to allow it to recognize "Completed" as not the last thing in
3060 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3061 patch that reportedly fixes this has been added. I am not expert enough to
3062 create a test for it. This is what the patch creator wrote:
3064 "I found a little strange behaviour of ldap code when working with
3065 Windows 2003 AD Domain, where users was placed in more than one
3066 Organization Units. When I tried to give exim partial DN, the exit code
3067 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3068 But simultaneously result of request was absolutely normal ldap result,
3069 so I produce this patch..."
3071 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3072 REFERENCE, so I have modified the code to exclude the patch when that macro
3075 55. Some experimental protocols are using DNS PTR records for new purposes. The
3076 keys for these records are domain names, not reversed IP addresses. The
3077 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3078 leaves it alone. Component reversal etc. now happens only for IP addresses.
3081 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3083 57. Double the size of the debug message buffer (to 2048) so that more of very
3084 long debug lines gets shown.
3086 58. The exicyclog utility now does better if the number of log files to keep
3087 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3089 59. Two changes related to the smtp_active_hostname option:
3091 (1) $smtp_active_hostname is now available as a variable.
3092 (2) The default for smtp_banner uses $smtp_active_hostname instead
3093 of $primary_hostname.
3095 60. The host_aton() function is supposed to be passed a string that is known
3096 to be a valid IP address. However, in the case of IPv6 addresses, it was
3097 not checking this. This is a hostage to fortune. Exim now panics and dies
3098 if the condition is not met. A case was found where this could be provoked
3099 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3100 components; fortuitously, this particular loophole had already been fixed
3101 by change 4.50/55 above.
3103 If there are any other similar loopholes, the new check in host_aton()
3104 itself should stop them being exploited. The report I received stated that
3105 data on the command line could provoke the exploit when Exim was running as
3106 exim, but did not say which command line option was involved. All I could
3107 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3108 running as the user.
3111 61. There was a buffer overflow vulnerability in the SPA authentication code
3112 (which came originally from the Samba project). I have added a test to the
3113 spa_base64_to_bits() function which I hope fixes it.
3116 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3117 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3119 63. The daemon start-up calls getloadavg() while still root for those OS that
3120 need the first call to be done as root, but it missed one case: when
3121 deliver_queue_load_max is set with deliver_drop_privilege. This is
3122 necessary for the benefit of the queue runner, because there is no re-exec
3123 when deliver_drop_privilege is set.
3125 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3126 This has been fixed.
3128 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3129 was in use, was not putting the data itself into the right store pool;
3130 consequently, it could be overwritten for a subsequent message in the same
3131 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3134 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3136 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3137 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3138 the function were treating the return as a boolean value, which happened to
3139 work because 0=false and not-0=true, but is not correct code.
3141 68. The host_aton() function was not handling scoped IPv6 addresses (those
3142 with, for example, "%eth0" on the end) correctly.
3144 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3145 negated items (that is, ~something) in unsigned ints. Some compilers
3146 apparently mutter when there is no cast.
3148 70. If an address verification called from an ACL failed, and did not produce a
3149 user-specific message (i.e. there was only a "system" message), nothing was
3150 put in $acl_verify_message. In this situation, it now puts the system
3153 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3154 session; change 4.31/43 added the unwanted input to the log line - except
3155 that it did not do this in the start of session case. It now does.
3157 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3158 This is wrong and can cause the other end to generate a synchronization
3159 error if it is another Exim or anything else that does the synchronization
3160 check. A QUIT command is no longer sent after a timeout.
3162 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3163 during host lookups.
3165 74. The defer_ok option of callout verification was not working if it was used
3166 when verifying addresses in header lines, that is, for this case:
3168 verify = header_sender/callout=defer_ok
3170 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3171 those file descriptors could be used for SMTP connections. If anything
3172 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3173 could be sent to the SMTP client, causing chaos. The daemon now opens
3174 stdin, stdout, and stderr to /dev/null when it puts itself into the
3177 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3178 log by default. The user can override this with suitable Perl magic.
3180 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3181 the log message when discard triggers, was not working for the DATA ACL or
3182 for the non-SMTP ACL.
3184 78. Error message wording change in sieve.c.
3186 79. If smtp_accept_max_per_host was set, the number of connections could be
3187 restricted to fewer than expected, because the daemon was trying to set up
3188 a new connection before checking whether the processes handling previous
3189 connections had finished. The check for completed processes is now done
3190 earlier. On busy systems, this bug wouldn't be noticed because something
3191 else would have woken the daemon, and it would have reaped the completed
3194 80. If a message was submitted locally by a user whose login name contained one
3195 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3196 It caused a spool format error. I have fixed the spool reading code. A
3197 related problem was that the "from" clause in the Received: line became
3198 illegal because of the space(s). It is now covered by ${quote_local_part.
3200 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3203 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3205 83. Patch from Sieve maintainer to fix unterminated string problem in
3206 "vacation" handling.
3208 84. Some minor changes to the Linux configuration files to help with other
3209 OS variants using glibc.
3211 85. One more patch for Sieve to update vacation handling to latest spec.
3214 ----------------------------------------------------
3215 See the note above about the 4.44 and 4.50 releases.
3216 ----------------------------------------------------
3222 1. Change 4.43/35 introduced a bug that caused file counts to be
3223 incorrectly computed when quota_filecount was set in an appendfile
3226 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3227 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3230 3. Give more explanation in the error message when the command for a transport
3231 filter fails to execute.
3233 4. There are several places where Exim runs a non-Exim command in a
3234 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3235 was being done only for the command run by the queryprogram router. It is
3236 now done for all such subprocesses. The other cases are: ${run, transport
3237 filters, and the commands run by the lmtp and pipe transports.
3239 5. Some older OS have a limit of 256 on the maximum number of file
3240 descriptors. Exim was using setrlimit() to set 1000 as a large value
3241 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3242 systems. I've change it so that if it can't get 1000, it tries for 256.
3244 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3245 was an oversight, and furthermore, ever since the addition of extra
3246 controls (e.g. 4.43/32), the checks on when to allow different forms of
3247 "control" were broken. There should now be diagnostics for all cases when a
3248 control that does not make sense is encountered.
3250 7. $recipients is now available in the predata ACL (oversight).
3252 8. Tidy the search cache before the fork to do a delivery from a message
3253 received from the command line. Otherwise the child will trigger a lookup
3254 failure and thereby defer the delivery if it tries to use (for example) a
3255 cached ldap connection that the parent has called unbind on.
3257 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3258 of $address_data from the recipient verification was clobbered by the
3259 sender verification.
3261 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3262 was its contents. (It was OK if the option was not defined at all.)
3264 11. A "Completed" log line is now written for messages that are removed from
3265 the spool by the -Mrm option.
3267 12. $host_address is now set to the target address during the checking of
3268 ignore_target_hosts.
3270 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3271 being passed; this would have caused $sender_host_name to have been used if
3272 matching the list had actually called for a host name (not very likely,
3273 since this list is usually IP addresses). A host name is now passed as
3276 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3277 code that specifies a non-restarting handler (typically sigaction() in
3278 modern systems) in an attempt to fix a rare and obscure crash bug.
3280 15. Narrowed the window for a race in the daemon that could cause it to ignore
3281 SIGCHLD signals. This is not a major problem, because they are used only to
3282 wake it up if nothing else does.
3284 16. A malformed maildirsize file could cause Exim to calculate negative values
3285 for the mailbox size or file count. Odd effects could occur as a result.
3286 The maildirsize information is now recalculated if the size or filecount
3289 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3290 support for a long time. Removed HAVE_SYS_VFS_H.
3292 18. Updated exipick to current release from John Jetmore.
3294 19. Allow an empty sender to be matched against a lookup in an address list.
3295 Previously the only cases considered were a regular expression, or an
3298 20. Exim went into a mad DNS lookup loop when doing a callout where the
3299 host was specified on the transport, if the DNS lookup yielded more than
3302 21. The RFC2047 encoding function was originally intended for short strings
3303 such as real names; it was not keeping to the 75-character limit for
3304 encoded words that the RFC imposes. It now respects the limit, and
3305 generates multiple encoded words if necessary. To be on the safe side, I
3306 have increased the buffer size for the ${rfc2047: expansion operator from
3309 22. Failure to deliver a bounce message always caused it to be frozen, even if
3310 there was an errors_to setting on the router. The errors_to setting is now
3313 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3314 canonical form (fully expanded) before being placed in
3315 $sender_host_address.
3317 24. Updated eximstats to version 1.33
3319 25. Include certificate and key file names in error message when GnuTLS fails
3320 to set them up, because the GnuTLS error message doesn't include the name
3321 of the failing file when there is a problem reading it.
3323 26. Expand error message when OpenSSL has problems setting up cert/key files.
3326 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3327 (this can affect the format of dates).
3329 28. exim_tidydb, when checking for the continued existence of a message for
3330 which it has found a message-specific retry record, was not finding
3331 messages that were in split spool directories. Consequently, it was
3332 deleting retry records that should have stayed in existence.
3334 29. eximstats updated to version 1.35
3335 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3336 1.35 - bugfix such that pie charts by volume are generated correctly
3338 30. The SPA authentication driver was not abandoning authentication and moving
3339 on to the next authenticator when an expansion was forced to fail,
3340 contradicting the general specification for all authenticators. Instead it
3341 was generating a temporary error. It now behaves as specified.
3343 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3344 (the order specifies the preference for clients). The order is now AES256,
3345 AES128, 3DES, ARCFOUR128.
3347 31. Small patch to Sieve code - explicitly set From: when generating an
3350 32. Exim crashed if a remote delivery caused a very long error message to be
3351 recorded - for instance if somebody sent an entire SpamAssassin report back
3352 as a large number of 550 error lines. This bug was coincidentally fixed by
3353 increasing the size of one of Exim's internal buffers (big_buffer) that
3354 happened as part of the Exiscan merge. However, to be on the safe side, I
3355 have made the code more robust (and fixed the comments that describe what
3358 33. Some experimental protocols are using DNS PTR records for new purposes. The
3359 keys for these records are domain names, not reversed IP addresses. The
3360 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3361 leaves it alone. Component reversal etc. now happens only for IP addresses.
3364 34. The host_aton() function is supposed to be passed a string that is known
3365 to be a valid IP address. However, in the case of IPv6 addresses, it was
3366 not checking this. This is a hostage to fortune. Exim now panics and dies
3367 if the condition is not met. A case was found where this could be provoked
3368 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3369 components; fortuitously, this particular loophole had already been fixed
3370 by change 4.50/55 or 4.44/33 above.
3372 If there are any other similar loopholes, the new check in host_aton()
3373 itself should stop them being exploited. The report I received stated that
3374 data on the command line could provoke the exploit when Exim was running as
3375 exim, but did not say which command line option was involved. All I could
3376 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3377 running as the user.
3380 35. There was a buffer overflow vulnerability in the SPA authentication code
3381 (which came originally from the Samba project). I have added a test to the
3382 spa_base64_to_bits() function which I hope fixes it.
3385 36. The daemon start-up calls getloadavg() while still root for those OS that
3386 need the first call to be done as root, but it missed one case: when
3387 deliver_queue_load_max is set with deliver_drop_privilege. This is
3388 necessary for the benefit of the queue runner, because there is no re-exec
3389 when deliver_drop_privilege is set.
3391 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3392 was in use, was not putting the data itself into the right store pool;
3393 consequently, it could be overwritten for a subsequent message in the same
3394 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3397 38. Sometimes the final signoff response after QUIT could fail to get
3398 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3399 < 0 before doing a fflush(). This bug looks as though it goes back to the
3400 introduction of TLS in release 3.20, but "sometimes" must have been rare
3401 because the tests only now provoked it.
3407 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3408 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3409 Now it returns an integer. A number of calls were still expecting a T/F
3410 return. Fortuitously, in all cases, the tests worked in OK situations,
3411 which is the norm. However, things would have gone wrong on any write
3412 failures on the smtp file descriptor. This function is used when sending
3413 messages over SMTP and also when doing verify callouts.
3415 2. When Exim is called to do synchronous delivery of a locally submitted
3416 message (the -odf or -odi options), it no longer closes stderr before doing
3419 3. Implemented the mua_wrapper option.
3421 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3423 5. Implemented the functions header_remove(), header_testname(),
3424 header_add_at_position(), and receive_remove_recipient(), and exported them
3427 6. If an ACL "warn" statement specified the addition of headers, Exim already
3428 inserted X-ACL-Warn: at the start if there was no header name. However, it
3429 was not making this test for the second and subsequent header lines if
3430 there were newlines in the string. This meant that an invalid header could
3431 be inserted if Exim was badly configured.
3433 7. Allow an ACL "warn" statement to add header lines at the start or after all
3434 the Received: headers, as well as at the end.
3436 8. Added the rcpt_4xx retry error code.
3438 9. Added postmaster_mailfrom=xxx to callout verification option.
3440 10. Added mailfrom=xxxx to the callout verification option, for verify=
3443 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3444 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3446 12. Inserted some casts to stop certain compilers warning when using pointer
3447 differences as field lengths or precisions in printf-type calls (mostly
3448 affecting debugging statements).
3450 13. Added optional readline() support for -be (dynamically loaded).
3452 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3453 same clock tick as a message's arrival, so that its received time was the
3454 same as the "first fail" time on the retry record, and that message
3455 remained on the queue past the ultimate address timeout, every queue runner
3456 would try a delivery (because it was past the ultimate address timeout) but
3457 after another failure, the ultimate address timeout, which should have then
3458 bounced the address, did not kick in. This was a "< instead of <=" error;
3459 in most cases the first failure would have been in the next clock tick
3460 after the received time, and all would be well.
3462 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3463 being recognized when the domain list was tested by the match_domain
3464 condition in an expansion string.
3466 16. Added the ${str2b64: operator.
3468 17. Exim was always calling setrlimit() to set a large limit for the number of
3469 processes, without checking whether the existing limit was already
3470 adequate. (It did check for the limit on file descriptors.) Furthermore,
3471 errors from getrlimit() and setrlimit() were being ignored. Now they are
3472 logged to the main and panic logs, but Exim does carry on, to try to do its
3473 job under whatever limits there are.
3475 18. Imported PCRE 5.0.
3477 19. Trivial typo in log message " temporarily refused connection" (the leading
3480 20. If the log selector return_path_on_delivery was set and an address was
3481 redirected to /dev/null, the delivery process crashed because it assumed
3482 that a return path would always be set for a "successful" delivery. In this
3483 case, the whole delivery is bypassed as an optimization, and therefore no
3486 21. Internal re-arrangement: the function for sending a challenge and reading
3487 a response while authentication was assuming a zero-terminated challenge
3488 string. It's now changed to take a pointer and a length, to allow for
3489 binary data in such strings.
3491 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3493 23. Exim was not respecting finduser_retries when seeking the login of the
3494 uid under which it was called; it was always trying 10 times. (The default
3495 setting of finduser_retries is zero.) Also, it was sleeping after the final
3496 failure, which is pointless.
3498 24. Implemented tls_on_connect_ports.
3500 25. Implemented acl_smtp_predata.
3502 26. If the domain in control=submission is set empty, Exim assumes that the
3503 authenticated id is a complete email address when it generates From: or
3504 Sender: header lines.
3506 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3507 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3508 chown and chgrp in /bin and hostname in /usr/bin.
3510 28. Exim was keeping the "process log" file open after each use, just as it
3511 does for the main log. This opens the possibility of it remaining open for
3512 long periods when the USR1 signal hits a daemon. Occasional processlog
3513 errors were reported, that could have been caused by this. Anyway, it seems
3514 much more sensible not to leave this file open at all, so that is what now
3517 29. The long-running daemon process does not normally write to the log once it
3518 has entered its main loop, and it closes the log before doing so. This is
3519 so that log files can straightforwardly be renamed and moved. However,
3520 there are a couple of unusual error situations where the daemon does write
3521 log entries, and I had neglected to close the log afterwards.
3523 30. The text of an SMTP error response that was received during a remote
3524 delivery was being truncated at 512 bytes. This is too short for some of
3525 the long messages that one sometimes sees. I've increased the limit to
3528 31. It is now possible to make retry rules that apply only when a message has a
3529 specific sender, in particular, an empty sender.
3531 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3532 it possible to be selective about when SMTP synchronization is enforced.
3534 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3536 32. Implemented hosts_connection_nolog.
3538 33. Added an ACL for QUIT.
3540 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3543 35. Added mailbox_size and mailbox_filecount to appendfile.
3545 36. Added control = no_multiline_responses to ACLs.
3547 37. There was a bug in the logic of the code that waits for the clock to tick
3548 in the case where the clock went backwards by a substantial amount such
3549 that the microsecond fraction of "now" was more than the microsecond
3550 fraction of "then" (but the whole seconds number was less).
3552 38. Added support for the libradius Radius client library this is found on
3553 FreeBSD (previously only the radiusclient library was supported).
3559 1. When certain lookups returned multiple values in the form name=value, the
3560 quoting of the values was not always being done properly. Specifically:
3561 (a) If the value started with a double quote, but contained no whitespace,
3563 (b) If the value contained whitespace other than a space character (i.e.
3564 tabs or newlines or carriage returns) it was not quoted.
3565 This fix has been applied to the mysql and pgsql lookups by writing a
3566 separate quoting function and calling it from the lookup code. The fix
3567 should probably also be applied to nisplus, ibase and oracle lookups, but
3568 since I cannot test any of those, I have not disturbed their existing code.
3570 2. A hit in the callout cache for a specific address caused a log line with no
3571 reason for rejecting RCPT. Now it says "Previous (cached) callout
3572 verification failure".
3574 3. There was an off-by-one bug in the queryprogram router. An over-long
3575 return line was truncated at 256 instead of 255 characters, thereby
3576 overflowing its buffer with the terminating zero. As well as fixing this, I
3577 have increased the buffer size to 1024 (and made a note to document this).
3579 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3580 when Exim is waiting for an SMTP response from a remote server, Exim
3581 restarts its select() call on the socket, thereby resetting its timeout.
3582 This is not a problem when such interrupts are rare. Somebody set up a cron
3583 job to run exiwhat every 2 minutes, which is less than the normal select()
3584 timeout (5 or 10 minutes). This meant that the select() timeout never
3585 kicked in because it was always reset. I have fixed this by comparing the
3586 time when an interrupt arrives with the time at the start of the first call
3587 to select(). If more time than the timeout has elapsed, the interrupt is
3588 treated as a timeout.
3590 5. Some internal re-factoring in preparation for the addition of Sieve
3591 extensions (by MH). In particular, the "personal" test is moved to a
3592 separate function, and given an option for scanning Cc: and Bcc: (which is
3593 not set for Exim filters).
3595 6. When Exim created an email address using the login of the caller as the
3596 local part (e.g. when creating a From: or Sender: header line), it was not
3597 quoting the local part when it contained special characters such as @.
3599 7. Installed new OpenBSD configuration files.
3601 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3602 try to make them clearer.
3604 9. Callout options, other than the timeout value, were being ignored when
3605 verifying sender addresses in header lines. For example, when using
3607 verify = header_sender/callout=no_cache
3609 the cache was (incorrectly) being used.
3611 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3612 only the Cygwin environment.
3614 11. When return_path_on_delivery was set as a log selector, if different remote
3615 addresses in the same message used different return paths and parallel
3616 remote delivery occurred, the wrong values would sometimes be logged.
3617 (Whenever a remote delivery process finished, the return path value from
3618 the most recently started remote delivery process was logged.)
3620 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3621 lines when AUTH and/or TLS are in use. This is the "received protocol"
3622 field. Exim used to use "asmtp" for authenticated SMTP, without any
3623 indication (in the protocol name) for TLS use. Now it follows the RFC and
3624 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3625 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3626 names appear in log lines as well as in Received: header lines.
3628 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3629 extensions, and comparison tests, and to fix some bugs.
3631 14. Changes to the "personal" filter test:
3633 (1) The test was buggy in that it was just doing the equivalent of
3634 "contains" tests on header lines. For example, if a user's address was
3635 anne@some.where, the "personal" test would incorrectly be true for
3637 To: susanne@some.where
3639 This test is now done by extracting each address from the header in turn,
3640 and checking the entire address. Other tests that are part of "personal"
3641 are now done using regular expressions (for example, to check local parts
3642 of addresses in From: header lines).
3644 (2) The list of non-personal local parts in From: addresses has been
3645 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3646 taken from the Sieve specification recommendations.
3648 (3) If the message contains any header line starting with "List-" it is
3649 treated as non-personal.
3651 (4) The test for "circular" in the Subject: header line has been removed
3652 because it now seems ill-conceived.
3654 15. Minor typos in src/EDITME comments corrected.
3656 16. Installed latest exipick from John Jetmore.
3658 17. If headers_add on a router specified a text string that was too long for
3659 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3660 of string_sprintf() is now avoided.
3662 18. $message_body_size was not set (it was always zero) when running the DATA
3663 ACL and the local_scan() function.
3665 19. For the "mail" command in an Exim filter, no default was being set for
3666 the once_repeat time, causing a random time value to be used if "once" was
3667 specified. (If the value happened to be <= 0, no repeat happened.) The
3668 default is now 0s, meaning "never repeat". The "vacation" command was OK
3669 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3670 (I found it when inspecting the code).
3672 20. There is now an overall timeout for performing a callout verification. It
3673 defaults to 4 times the callout timeout, which applies to individual SMTP
3674 commands during the callout. The overall timeout applies when there is more
3675 than one host that can be tried. The timeout is checked before trying the
3676 next host. This prevents very long delays if there are a large number of
3677 hosts and all are timing out (e.g. when the network connections are timing
3678 out). The value of the overall timeout can be changed by specifying an
3679 additional sub-option for "callout", called "maxwait". For example:
3681 verify = sender/callout=5s,maxwait=20s
3683 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3684 to the end before writing, but this should make it even safer).
3686 22. Exim was forgetting that it had advertised PIPELINING for the second and
3687 subsequent messages on an SMTP connection. It was also not resetting its
3688 memory on STARTTLS and an internal HELO.
3690 23. When Exim logs an SMTP synchronization error within a session, it now
3691 records whether PIPELINING has been advertised or not.
3693 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3694 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3695 rather than long int.
3697 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3699 26. Added the never_mail option to autoreply.
3705 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3706 crash if the getsockname() call failed; this can happen if a connection is
3707 closed very soon after it is established. The problem was simply in the
3708 order in which certain operations were done, causing Exim to try to write
3709 to the SMTP stream before it had set up the file descriptor. The bug has
3710 been fixed by making things happen in the correct order.
3716 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3717 before the connection was closed, thus losing the rejection response.
3719 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3720 some early Solaris releases, but causes trouble in current releases where
3721 socklen_t is defined.
3723 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3726 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3729 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3730 that releasing the top of it at the end releases what was used for sub-
3731 expansions (unless the block got too big). However, discard this block if
3732 the first thing is a variable or header, so that we can use its block when
3733 it is dynamic (useful for very large $message_headers, for example).
3735 6. Lookups now cache *every* query, not just the most recent. A new, separate
3736 store pool is used for this. It can be recovered when all lookup caches are
3737 flushed. Lookups now release memory at the end of their result strings.
3738 This has involved some general refactoring of the lookup sources.
3740 7. Some code has been added to the store_xxx() functions to reduce the amount
3741 of flapping under certain conditions.
3743 8. log_incoming_interface used to affect only the <= reception log lines. Now
3744 it causes the local interface and port to be added to several more SMTP log
3745 lines, for example "SMTP connection from", and rejection lines.
3747 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3749 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3751 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3752 could be overwritten at the end of the current message (or the start of a
3753 new message if it was set in a HELO ACL). The value is now preserved for
3754 the duration of the SMTP connection.
3756 12. If a transport had a headers_rewrite setting, and a matching header line
3757 contained an unqualified address, that address was qualified, even if it
3758 did not match any rewriting rules. The underlying bug was that the values
3759 of the flags that permit the existence of unqualified sender and recipient
3760 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3761 non-local messages, and by -bnq for local messages) were not being
3762 preserved with the message after it was received.
3764 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3765 "next input=" as part of the text comprising the host identity instead of
3766 the correct text. The code was using the same buffer for two different
3767 strings. However, depending on which order the printing function evaluated
3768 its arguments, the bug did not always show up. Under Linux, for example, my
3769 test suite worked just fine.
3771 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3772 doesn't work with some older versions of Perl. It has been changed to "my",
3773 which in any case is probably the better facility to use.
3775 15. A really picky compiler found some instances of statements for creating
3776 error messages that either had too many or two few arguments for the format
3779 16. The size of the buffer for calls to the DNS resolver has been increased
3780 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3781 for addresses that have a lot of PTR records. This alleviates a problem; it
3782 does not fully solve it.
3784 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3785 buffer now truncates the list and logs the incident, which is the same
3786 action as happens when Exim is looking up a host name and its aliases.
3787 Previously in this situation something unpredictable would happen;
3788 sometimes it was "internal error: store_reset failed".
3790 18. If a server dropped the connection unexpectedly when an Exim client was
3791 using GnuTLS and trying to read a response, the client delivery process
3792 crashed while trying to generate an error log message.
3794 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3795 string, for example:
3797 warn message = H1: something\nH2: something
3799 the text was added as a single header line from Exim's point of view
3800 though it ended up OK in the delivered message. However, searching for the
3801 second and subsequent header lines using $h_h2: did not work. This has been
3802 fixed. Similarly, if a system filter added multiple headers in this way,
3803 the routers could not see them.
3805 20. Expanded the error message when iplsearch is called with an invalid key to
3806 suggest using net-iplsearch in a host list.
3808 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3809 ACLs are no longer actually imposed (and a message to that effect is
3812 22. If a "gecos" field in a passwd entry contained escaped characters, in
3813 particular, if it contained a \" sequence, Exim got it wrong when building
3814 a From: or a Sender: header from that name. A second bug also caused
3815 incorrect handling when an unquoted " was present following a character
3816 that needed quoting.
3818 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3819 was not being matched caselessly.
3821 24. Arranged for all hyphens in the exim.8 source to be escaped with
3824 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3825 properly. Recipient callout cache records were still being keyed to include
3826 the sender, even when use_sender was set false. This led to far more
3827 callouts that were necessary. The sender is no longer included in the key
3828 when use_sender is false.
3830 26. Added "control = submission" modifier to ACLs.
3832 27. Added the ${base62d: operator to decode base 62 numbers.
3834 28. dnsdb lookups can now access SRV records.
3836 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3837 the configuration file.
3839 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3840 (-v) mode. This makes the output for a verbose queue run more intelligible.
3842 31. Added a use_postmaster feature to recipient callouts.
3844 32. Added the $body_zerocount variable, containing the number of binary zero
3845 bytes in the message body.
3847 33. The time of last modification of the "new" subdirectory is now used as the
3848 "mailbox time last read" when there is a quota error for a maildir
3851 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3853 35. Added +ignore_unknown as a special item in host lists.
3855 36. Code for decoding IPv6 addresses in host lists is now included, even if
3856 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3857 address was recognized as an IP address, but was then not correctly decoded
3858 into binary, causing unexpected and incorrect effects when compared with
3865 1. Very minor rewording of debugging text in manualroute to say "list of
3866 hosts" instead of "hostlist".
3868 2. If verify=header_syntax was set, and a header line with an unqualified
3869 address (no domain) and a large number of spaces between the end of the
3870 name and the colon was received, the reception process suffered a buffer
3871 overflow, and (when I tested it) crashed. This was caused by some obsolete
3872 code that should have been removed. The fix is to remove it!
3874 3. When running in the test harness, delay a bit after writing a bounce
3875 message to get a bit more predictability in the log output.
3877 4. Added a call to search_tidyup() just before forking a reception process. In
3878 theory, someone could use a lookup in the expansion of smtp_accept_max_
3879 per_host which, without the tidyup, could leave open a database connection.
3881 5. Added the variables $recipient_data and $sender_data which get set from a
3882 lookup success in an ACL "recipients" or "senders" condition, or a router
3883 "senders" option, similar to $domain_data and $local_part_data.
3885 6. Moved the writing of debug_print from before to after the "senders" test
3888 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3889 problems for message scanning, either using a data ACL, or using
3890 local_scan() because the Received: header was not generated till after they
3891 were called (in order to set the time as the time of reception completion).
3892 I have revised the way this works. The header is now generated after the
3893 body is received, but before the ACL or local_scan() are called. After they
3894 are run, the timestamp in the header is updated.
3900 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3901 before starting a queue runner without re-exec. This happened only when
3902 deliver_drop_privilege was set or when the Exim user was set to root. The
3903 effect of the bug was that timeouts during subsequent deliveries caused
3904 crashes instead of being properly handled. The handler is now left at its
3905 default (and expected) setting.
3907 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3908 message, again when deliver_drop_privilege is set or Exim is run as root.
3909 The bug described in (1) was not present in this case, but the tidying up
3910 of the other signals was missing. I have made the two cases consistent.
3912 3. The ignore_target_hosts setting on a manualroute router was being ignored
3913 for hosts that were looked up using the /MX notation.
3915 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3918 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3919 operated on the sender address. After changing the $sender_address to <>
3920 for the sender address verify, Exim was re-instated it as the original
3921 (before rewriting) address, but remembering that it had rewritten it, so it
3922 wasn't rewriting it again. This bug also had the effect of breaking the
3923 sender address verification caching when the sender address was rewritten.
3925 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3926 This has been changed so that if the ip literal address matches
3927 ignore_target_hosts, the router declines.
3929 7. Added expansion conditions match_domain, match_address, and match_local_
3930 part (NOT match_host).
3932 8. The placeholder for the Received: header didn't have a length field set.
3934 9. Added code to Exim itself and to exim_lock to test for a specific race
3935 condition that could lead to file corruption when using MBX delivery. The
3936 issue is with the lockfile that is created in /tmp. If this file is removed
3937 after a process has opened it but before that process has acquired a lock,
3938 there is the potential for a second process to recreate the file and also
3939 acquire a lock. This could lead to two Exim processes writing to the file
3940 at the same time. The added code performs the same test as UW imapd; it
3941 checks after acquiring the lock that its file descriptor still refers to
3942 the same named file.
3944 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3945 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3948 11. Added the smtp_active_hostname option. If used, this will typically be made
3949 to depend on the incoming interface address. Because $interface_address is
3950 not set up until the daemon has forked a reception process, error responses
3951 that can happen earlier (such as "too many connections") no longer contain
3954 12. If an expansion in a condition on a "warn" statement fails because a lookup
3955 defers, the "warn" statement is abandoned, and the next ACL statement is
3956 processed. Previously this caused the whole ACL to be aborted.
3958 13. Added the iplsearch lookup type.
3960 14. Added ident_timeout as a log selector.
3962 15. Added tls_certificate_verified as a log selector.
3964 16. Added a global option tls_require_ciphers (compare the smtp transport
3965 option of the same name). This controls incoming TLS connections.
3967 17. I finally figured out how to make tls_require_ciphers do a similar thing
3968 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3969 before starting the TLS session.
3971 18. Tabs are now shown as \t in -bP output.
3973 19. If the log selector return_path_on_delivery was set, Exim crashed when
3974 bouncing a message because it had too many Received: header lines.
3976 20. If two routers both had headers_remove settings, and the first one included
3977 a superfluous trailing colon, the final name in the first list and the
3978 first name in the second list were incorrectly joined into one item (with a
3979 colon in the middle).
3985 1. Added -C and -D options to the exinext utility, mainly to make it easier
3986 to include in the automated testing, but these could be helpful when
3987 multiple configurations are in use.
3989 2. The exinext utility was not formatting the output nicely when there was
3990 an alternate port involved in the retry record key, nor when there was a
3991 message id as well (for retries that were specific to a specific message
3992 and a specific host). It was also confused by IPv6 addresses, because of
3993 the additional colons they contain. I have fixed the IPv4 problem, and
3994 patched it up to do a reasonable job for IPv6.
3996 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3997 delivery, the log line now contains "pipelined" if PIPELINING was used.
3999 4. An SMTP transport process used to panic and die if the bind() call to set
4000 an explicit outgoing interface failed. This has been changed; it is now
4001 treated in the same way as a connect() failure.
4003 5. A reference to $sender_host_name in the part of a conditional expansion
4004 that was being skipped was still causing a DNS lookup. This no longer
4007 6. The def: expansion condition was not recognizing references to header lines
4008 that used bh_ and bheader_.
4010 7. Added the _cache feature to named lists.
4012 8. The code for checking quota_filecount in the appendfile transport was
4013 allowing one more file than it should have been.
4015 9. For compatibility with Sendmail, the command line option
4023 and sets the incoming protocol and host name (for trusted callers). The
4024 host name and its colon can be omitted when only the protocol is to be set.
4025 Note the Exim already has two private options, -pd and -ps, that refer to
4026 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4027 "s", but I don't think that's a major issue.
4029 10. A number of refactoring changes to the code, none of which should affect
4032 (a) The number of logging options was getting close to filling up the
4033 32-bit word that was used as a bit map. I have split them into two classes:
4034 those that are passed in the argument to log_write(), and those that are
4035 only ever tested independently outside of that function. These are now in
4036 separate 32-bit words, so there is plenty of room for expansion again.
4037 There is no change in the user interface or the logging behaviour.
4039 (b) When building, for example, log lines, the code previously used a
4040 macro that called string_cat() twice, in order to add two strings. This is
4041 not really sufficiently general. Furthermore, there was one instance where
4042 it was actually wrong because one of the argument was used twice, and in
4043 one call a function was used. (As it happened, calling the function twice
4044 did not affect the overall behaviour.) The macro has been replaced by a
4045 function that can join an arbitrary number of extra strings onto a growing
4048 (c) The code for expansion conditions now uses a table and a binary chop
4049 instead of a serial search (which was left over from when there were very
4050 few conditions). Also, it now recognizes conditions like "pam" even when
4051 the relevant support is not compiled in: a suitably worded error message is
4052 given if an attempt is made to use such a condition.
4054 11. Added ${time_interval:xxxxx}.
4056 12. A bug was causing one of the ddress fields not to be passed back correctly
4057 from remote delivery subprocesses. The field in question was not being
4058 subsequently used, so this caused to problems in practice.
4060 13. Added new log selectors queue_time and deliver_time.
4062 14. Might have fixed a bug in maildirsizefile handling that threw up
4063 "unexpected character" debug warnings, and recalculated the data
4064 unnecessarily. In any case, I expanded the warning message to give more
4067 15. Added the message "Restricted characters in address" to the statements in
4068 the default ACL that block characters like @ and % in local parts.
4070 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4071 Three changes have been made:
4073 (a) There was a serious bug; a negative response to MAIL caused the whole
4074 recipient domain to be cached as invalid, thereby blocking all messages
4075 to all local parts at the same domain, from all senders. This bug has
4076 been fixed. The domain is no longer cached after a negative response to
4077 MAIL if the sender used is not empty.
4079 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4082 (c) A new callout option, "use_sender" has been added for people who want
4083 the modified behaviour.
4089 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4092 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4093 indeed breaks things for older releases.
4095 3. Added additional logging to the case where there is a problem reading data
4096 from a filter that is running in a subprocess using a pipe, in order to
4097 try to track down a specific problem.
4099 4. Testing facility fudge: when running in the test harness and attempting
4100 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4101 getting "No route to host". Convert this to a timeout.
4103 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4106 6. Some OS don't have socklen_t but use size_t instead. This affects the
4107 fifth argument of getsockopt() amongst other things. This is now
4108 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4109 can be set for individual OS. I have set it for SunOS5, OSF1, and
4110 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4111 some earlier ones do not.
4113 7. Change 4.30/15 was not doing the test caselessly.
4115 8. The standard form for an IPv6 address literal was being rejected by address
4116 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4117 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4118 this, as well as the form without the "IPv6" on the front (but only when
4119 address literals are enabled, of course).
4121 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4123 10. Exim crashed if a message with an empty sender address specified by -f
4124 encountered a router with an errors_to setting. This could be provoked only
4125 by a command such as
4129 where an empty string was supplied; "<>" did not hit this bug.
4131 11. Installed PCRE release 4.5.
4133 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4134 remained set. It is now erased.
4136 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4137 times from message ids (which are base 36 rather than the normal 62).
4139 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4140 were being counted as actual protocol errors, and logged if the log
4141 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4142 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4143 and DATA following a set of rejected RCPTs do not count as protocol errors.
4144 In other words, Exim assumes they were pipelined, though this may not
4145 actually be the case. Of course, in all cases the client gets an
4146 appropriate error code.
4148 15. If a lookup fails in an ACL condition, a message about the failure may
4149 be available; it is used if testing the ACL cannot continue, because most
4150 such messages specify what the cause of the deferral is. However, some
4151 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4152 that caused an old message to be retained and used if a later statement
4153 caused a defer, replacing the real cause of the deferral.
4155 16. If an IP address had so many PTR records that the DNS lookup buffer
4156 was not large enough to hold them, Exim could crash while trying to process
4157 the truncated data. It now detects and logs this case.
4159 17. Further to 4.21/58, another change has been made: if (and only if) the
4160 first line of a message (the first header line) ends with CRLF, a bare LF
4161 in a subsequent header line has a space inserted after it, so as not to
4162 terminate the header.
4164 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4165 unnecessarily, used atoi() instead of strtol(), and didn't check the
4166 termination when getting file sizes from file names by regex.
4168 19. Completely re-implemented the support for maildirsize files, in the light
4169 of a number of problems with the previous contributed implementation
4170 (4.30/29). In particular:
4172 . If the quota is zero, the maildirsize file is maintained, but no quota is
4175 . If the maildir directory does not exist, it is created before any attempt
4176 to write a maildirsize file.
4178 . The quota value in the file is just a cache; if the quota is changed in
4179 the transport, the new value overrides.
4181 . A regular expression is available for excluding directories from the
4184 20. The autoreply transport checks the characters in options that define the
4185 message's headers; it allows continued headers, but it was checking with
4186 isspace() after an embedded newline instead of explicitly looking for a
4189 21. If all the "regular" hosts to which an address was routed had passed their
4190 expiry times, and had not reached their retry times, the address was
4191 bounced, even if fallback hosts were defined. Now Exim should go on to try
4194 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4195 equivalent code in the SMTP transport. Some hosts send humungous responses
4196 to HELO/EHLO, more than 1024 it seems.
4198 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4199 gives compiler warnings in some environments. I've now done it "properly",
4202 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4203 (because of problems with the built-in one) was declared to return uschar *
4204 instead of char *, causing compiler failure.
4206 25. Fixed a file descriptor leak when processing alias/forward files.
4208 26. Fixed a minor format string issue in dbfn.c.
4210 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4212 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4213 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4216 29. When a sender address is verified, it is cached, to save repeating the test
4217 when there is more than one recipient in a message. However, when the
4218 verification involves a callout, it is possible for different callout
4219 options to be set for different recipients. It is too complicated to keep
4220 track of this in the cache, so now Exim always runs a verification when a
4221 callout is required, relying on the callout cache for the optimization.
4222 The overhead is duplication of the address routing, but this should not be
4225 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4226 to be verified with callout=postmaster, and the main callout worked but the
4227 postmaster check failed, the verification correctly failed. However, if a
4228 subsequent RCPT command asked for sender verification *without* the
4229 postmaster check, incorrect caching caused this verification also to fail,
4232 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4233 it was not caching the DNS options (qualify_single, search_parents) that
4234 were used when the lookup failed. A subsequent lookup with different
4235 options therefore always gave the same answer, though there were cases
4236 where it should not have. (Example: a "domains = !$mx_any" option on a
4237 dnslookup router: the "domains" option is always processed without any
4238 widening, but the router might have qualify_single set.) Now Exim uses the
4239 cached value only when the same options are set.
4241 32. Added John Jetmore's "exipick" utility to the distribution.
4243 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4244 than a timeout (e.g. a certificate is required, and is not provided), an
4245 Exim server now closes the connection immediately. Previously it waited for
4246 the client to close - but if the client is SSL, it seems that they each
4247 wait for each other, leading to a delay before one of them times out.
4249 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4250 maintained 0.8.x compatibility because I don't think many are using it, and
4251 it is clearly obsolete.
4253 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4256 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4257 client certificate was expired. A simple patch fixes this, though I don't
4258 understand the full logic of why the verify callback is called multiple
4261 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4262 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4263 which causes problems with some clients (such as the Certicom SSL Plus
4264 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4265 disables the coutermeasure allowing Eudora to connect."
4267 38. Exim was not checking that a write() to a log file succeeded. This could
4268 lead to Bad Things if a log got too big, in particular if it hit a file
4269 size limit. Exim now panics and dies if it cannot write to a log file, just
4270 as it does if it cannot open a log file.
4272 39. Modified OS/Makefile-Linux so that it now contains
4274 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4276 The two -D definitions ensure that Exim is compiled with large file
4277 support, which makes it possible to handle log files that are bigger than
4280 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4281 instance) a domain was checked against a named list that involved a lookup,
4282 causing $domain_data to be set, then another domain was checked against the
4283 same list, then the first domain was re-checked, the value of $domain_data
4284 after the final check could be wrong. In particular, if the second check
4285 failed, it could be set empty. This bug probably also applied to
4288 41. The strip_trailing_dot option was not being applied to the address given
4289 with the -f command-line option.
4291 42. The code for reading a message's header from the spool was incrementing
4292 $received_count, but never initializing it. This meant that the value was
4293 incorrect (doubled) while delivering a message in the same process in which
4294 it was received. In the most common configuration of Exim, this never
4295 happens - a fresh exec is done - but it can happen when
4296 deliver_drop_privilege is set.
4298 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4299 it now includes up to 150 characters of the unexpected data in the log
4302 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4303 and building data strings. The size of both of these buffers was 10 000
4304 bytes - far larger than anybody would *ever* want, thought I. Needless to
4305 say, somebody hit the limit. I have increased the maximum line length to
4306 20 000 and the maximum data length of concatenated lines to 100 000. I have
4307 also fixed two bugs, because there was no checking on these buffers. Tsk,
4308 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4309 buffer is too small.
4311 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4312 lsearch lookups. Now it does.
4314 46. When parsing a route_list item in a manualroute router, a fixed-length
4315 buffer was used for the list of hosts. I made this 1024 bytes long,
4316 thinking that nobody would ever have a list of hosts that long. Wrong.
4317 Somebody had a whole pile of complicated expansion conditions, and the
4318 string was silently truncated, leading to an expansion error. It turns out
4319 that it is easier to change to an unlimited length (owing to other changes
4320 that have happened since this code was originally written) than to build
4321 structure for giving a limitation error. The length of the item that
4322 expands into the list of hosts is now unlimited.
4324 47. The lsearch lookup could not handle data where the length of text line was
4325 more than 4095 characters. Such lines were truncated, leading to shortened
4326 data being returned. It should now handle lines of any length.
4328 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4329 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4332 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4333 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4334 no longer happens in comment lines. A list of replacements is now placed
4335 at the head of all of the source files, except those whose only change is
4336 to replace PERL_COMMAND in the very first #! line.
4338 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4339 messages on the queue, with a bottom-up merge sort, using code contributed
4340 by Michael Haardt. This should make operations like -bp somewhat faster on
4341 large queues. It won't affect queue runners, except when queue_run_in_order
4344 51. Installed eximstats 1.31 in the distribution.
4346 52. Added support for SRV lookups to the dnslookup router.
4348 53. If an ACL referred to $message_body or $message_body_end, the value was not
4349 reset for any messages that followed in the same SMTP session.
4351 54. The store-handling optimization for building very long strings was not
4352 differentiating between the different store pools. I don't think this
4353 actually made any difference in practice, but I've tidied it.
4355 55. While running the routers to verify a sender address, $sender_address
4356 was still set to the sender address. This is wrong, because when routing to
4357 send a bounce to the sender, it would be empty. Therefore, I have changed
4358 it so that, while verifying a sender address, $sender_address is set to <>.
4359 (There is no change to what happens when verifying a recipient address.)
4361 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4362 target A or AAAA records (if not already returned) without resetting the
4363 qualify_single or search_parents options of the DNS resolver. These are
4364 inappropriate in this case because the targets of MX and SRV records must
4365 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4366 target that, when qualified, matched something in the local domain. These
4367 two options are now turned off when doing these lookups.
4369 57. It seems that at least some releases of Reiserfs (which does not have the
4370 concept of a fixed number of inodes) returns zero and not -1 for the
4371 number of available inodes. This interacted badly with check_spool_inodes,
4372 which assumed that -1 was the "no such thing" setting. What I have done is
4373 to check that the total number of inodes is greater than zero before doing
4374 the test of how many are available.
4376 58. When a "warn" ACL statement has a log_message modifier, the message is
4377 remembered, and not repeated. This is to avoid a lot of repetition when a
4378 message has many recipients that cause the same warning to be written.
4379 Howewer, Exim was preserving the list of already written lines for an
4380 entire SMTP session, which doesn't seem right. The memory is now reset if a
4381 new message is started.
4383 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4384 debugging output unless log_rewrite was also set.
4386 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4387 of (int)(handle) when we know that handle contains (void *)(-1).
4389 61. The Exim daemon panic-logs an error return when it closes the incoming
4390 connection. However "connection reset by peer" seems to be common, and
4391 isn't really an error worthy of noting specially, so that particular error
4394 62. When Exim is trying to find all the local interfaces, it used to panic and
4395 die if the ioctl to get the interface flags failed. However, it seems that
4396 on at least one OS (Solaris 9) it is possible to have an interface that is
4397 included in the list of interfaces, but for which you get a failure error
4398 for this call. This happens when the interface is not "plumbed" into a
4399 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4400 failure of the "get flags" call assumes that the interface is down.
4402 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4403 makes life easier for people who are doing arithmetic on fields extracted
4404 from dates, where you often get leading zeros that should not be
4405 interpreted as octal.
4407 64. Added qualify_domain to the redirect router, to override the global
4410 65. If a pathologically long header line contained very many addresses (the
4411 report of this problem mentioned 10 000) and each of them was rewritten,
4412 Exim could use up a very large amount of memory. (It kept on making new
4413 copies of the header line as it rewrote, and never released the old ones.)
4414 At the expense of a bit more processing, the header rewriting function has
4415 been changed so that it no longer eats memory in this way.
4417 66. The generation of the Received: header has been moved from the time that a
4418 message starts to be received, to the time that it finishes. The timestamp
4419 in the Received: header should now be very close to that of the <= log
4420 line. There are two side-effects of this change:
4422 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4423 logged header lines no longer include the local Received: line, because
4424 it has not yet been created. The same applies to a copy of the message
4425 that is returned to a non-SMTP sender when a message is rejected.
4427 (b) When a filter file is tested using -bf, no additional Received: header
4428 is added to the test message. After some thought, I decided that this
4431 This change does not affect the value of $received_for. It is still set
4432 after address rewriting, but before local_scan() is called.
4434 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4436 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4437 gave an unhelpful panic error message, and a defer error. I have managed to
4438 change this behaviour so that it now rejects any supplied certificate,
4439 which seems right, as the list of acceptable certificates is empty.
4441 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4442 gave an unhelpful defer error. I have not managed to make this reject any
4443 supplied certificates, but the error message it gives is "no certificate
4444 supplied", which is not helpful.
4446 70. exigrep's output now also includes lines that are not associated with any
4447 message, but which match the given pattern. Implemented by a patch from
4448 Martin Sluka, which also tidied up the Perl a bit.
4450 71. Recipient callout verification, like sender verification, was using <> in
4451 the MAIL FROM command. This isn't really the right thing, since the actual
4452 sender may affect whether the remote host accepts the recipient or not. I
4453 have changed it to use the actual sender in the callout; this means that
4454 the cache record is now keyed on a recipient/sender pair, not just the
4455 recipient address. There doesn't seem to be a real danger of callout loops,
4456 since a callout by the remote host to check the sender would use <>.
4457 [SEE ABOVE: changed after hitting problems.]
4459 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4460 temporary errors. However, in the case of such a code being given after
4461 the end of a data transmission (i.e. after ".") Exim was failing to write
4462 a retry record for the message. (Yes, there was some broken host that was
4463 actually sending 8xx at this point.)
4465 73. An unknown lookup type in a host list could cause Exim to panic-die when
4466 the list was checked. (An example that provoked this was putting <; in the
4467 middle of a list instead of at the start.) If this happened during a DATA
4468 ACL check, a -D file could be left lying around. This kind of configuration
4469 error no longer causes Exim to die; instead it causes a defer errror. The
4470 incident is still logged to the main and panic logs.
4472 74. Buglet left over from Exim 3 conversion. The message "too many messages
4473 in one connection" was written to the rejectlog but not the mainlog, except
4474 when address rewriting (yes!) was being logged.
4476 75. Added write_rejectlog option.
4478 76. When a system filter was run not as root (that is, when system_filter_user
4479 was set), the values of the $n variables were not being returned to the
4480 main process; thus, they were not subsequently available in the $sn
4483 77. Added +return_path_on_delivery log selector.
4485 78. A connection timeout was being treated differently from recipients deferred
4486 when testing hosts_max_try with a message that was older than the host's
4487 retry timeout. (The host should not be counted, thus allowing all hosts to
4488 be tried at least once before bouncing.) This may have been the cause of an
4489 occasionally reported bug whereby a message would remain on the queue
4490 longer than the retry timeout, but would be bounced if a delivery was
4491 forced. I say "may" because I never totally pinned down the problem;
4492 setting up timeout/retry tests is difficult. See also the next item.
4494 79. The ultimate address timeout was not being applied to errors that involved
4495 a combination of host plus message (for example, a timeout on a MAIL
4496 command). When an address resolved to a number of possible hosts, and they
4497 were not all tried for each delivery (e.g. because of hosts_max_try), a
4498 message could remain on the queue longer than the retry timeout.
4500 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4503 81. Fixed an obscure SMTP outgoing bug which required at least the following
4504 conditions: (a) there was another message waiting for the same server;
4505 (b) the server returned 5xx to all RCPT commands in the first message so
4506 that the message was not completed; (c) the server dropped the connection
4507 or gave a negative response to the RSET that Exim sends to abort the
4508 transaction. The observed case was a dropped connection after DATA that had
4509 been sent in pipelining mode. That is, the server had advertised PIPELINING
4510 but was not implementing it correctly. The effect of the bug was incorrect
4511 behaviour, such as trying another host, and this could lead to a crash.
4517 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4518 and daemon.c were passed as pointers to ints; they should have been
4519 pointers to socklen_t variables (which are typically unsigned ints).
4521 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4524 3. Fixed a really odd bug that affected only the testing scheme; patching a
4525 certain fixed string in the binary changed the value of another string that
4526 happened to be identical to the end of the original first string.
4528 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4529 name", it returns that address as the IP address. On some operating
4530 systems (e.g. Solaris), it also passes back the IP address string as the
4531 "host name". However, on others (e.g. Linux), it passes back an empty
4532 string. Exim wasn't checking for this, and was changing the host name to an
4533 empty string, assuming it had been canonicized.
4535 5. Although rare, it is permitted to have more than one PTR record for a given
4536 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4537 all the names associated with an address, because they do in Solaris.
4538 However, it seems that they do not in Linux for data that comes from the
4539 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4540 I found this out when I moved to a new Linux workstation and tried to run
4541 the Exim test suite.
4543 To get round this problem I have changed the code so that it now does its
4544 own call to the DNS to look up PTR records when searching for a host name.
4545 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4546 addresses that are only in /etc/hosts are still found.
4548 This behaviour is, however, controlled by an option called host_lookup_
4549 order, which defaults to "bydns:byaddr". If people want to use the other
4550 order, or indeed, just use one or the other means of lookup, they can
4551 specify it in this variable.
4553 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4554 some operating systems, this comes back from gethostbyaddr() as an empty
4555 string, and this is what Exim used to test for. However, it seems that in
4556 other systems, "." is yielded. Exim now tests for this case too.
4558 7. The values of check_spool_space and check_log_space are now held internally
4559 as a number of kilobytes instead of an absolute number of bytes. If a
4560 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4561 kilobyte. This means that much larger values can be stored.
4563 8. Exim monitor: an attempt to get the action menu when not actually pointing
4564 at a message produces an empty menu entitled "No message selected". This
4565 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4566 no entries in it ("Shell widget menu has zero width and/or height"). So I
4567 have added a single, blank menu entry in this case.
4569 9. Added ${quote_local_part.
4571 10. MIME decoding is now applied to the contents of Subject: header lines when
4574 11. Now that a reference to $sender_host_address automatically causes a reverse
4575 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4576 host lookup before query-style lookups in lists that might use this
4577 variable. This has therefore been abolished, and the "net-" prefix is no
4578 longer necessary for query-style lookups.
4580 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4581 have been a typo for LFLAGS, so it has been changed.
4583 13. The install script calls Exim with "-C /dev/null" in order to find the
4584 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4585 to be output. Howeve, since Exim outputs its version number before the
4586 error, it didn't break the script. It just looked ugly. I fixed this by
4587 always allowing "-C /dev/null" if the caller is root.
4589 14. Ignore overlarge ACL variable number when reading spool file - insurance
4590 against a later release with more variables having written the file.
4592 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4593 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4594 this, as well as the form without the "IPv6" on the front.
4596 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4597 OS/Makefile-Darwin file.
4599 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4600 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4602 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4603 variable. However, some OS use ints for inodes. I've added cast to long int
4604 to get rid of the compiler warning.
4606 19. I had forgotten to lock out "/../" in configuration file names when
4607 ALT_CONFIG_PREFIX was set.
4609 20. Routers used for verification do not need to specify transports. However,
4610 if such a router generated a host list, and callout was configured, Exim
4611 crashed, because it could not find a port number from the (non-existent)
4612 transport. It now assumes port 25 in this circumstance.
4614 21. Added the -t option to exigrep.
4616 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4617 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4618 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4619 them is set, LOOKUP_LSEARCH is forced.
4621 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4623 24. Added sender and host information to the "rejected by local_scan()" log
4624 line; previously there was no indication of these.
4626 25. Added .include_if_exists.
4628 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4629 Linux. It turns out that not all file systems support this. Apparently some
4630 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4631 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4632 not supported on the file descriptor, is now ignored when Exim is trying to
4633 sync a directory. This applies only to Linux.
4635 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4637 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4638 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4641 29. Added support for maildirsize files from supplied patch (modified a bit).
4643 30. The use of :fail: followed by an empty string could lead Exim to respond to
4644 sender verification failures with (e.g.):
4646 550 Verification failed for <xxx>
4647 550 Sender verify failed
4649 where the first response line was missing the '-' that indicates it is not
4650 the final line of the response.
4652 31. The loop for finding the name of the user that called Exim had a hardwired
4653 limit of 10; it now uses the value of finduser_retries, which is used for
4654 all other user lookups.
4656 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4659 33. Exim was neglecting to zero errno before one call of strtol() when
4660 expanding a string and expecting an integer value. On some systems this
4661 resulted in spurious "integer overflow" errors. Also, it was casting the
4662 result into an int without checking.
4664 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4665 did not work. The code looks as if it has *never* worked, though it appears
4666 to have been documented since at least releast 1.62. I have made it work.
4668 35. The "timeout_DNS" error in retry rules, also documented since at least
4669 1.62, also never worked. As it isn't clear exactly what this means, and
4670 clearly it isn't a major issue, I have abolished the feature by treating it
4671 as "timeout", and writing a warning to the main and panic logs.
4673 36. The display of retry rules for -brt wasn't always showing the error code
4676 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4677 timeout_connect_A, timeout_connect_MX.
4679 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4680 to the empty sender.
4682 39. The daemon was not analysing the content of -oX till after it had closed
4683 stderr and disconnected from the controlling terminal. This meant that any
4684 syntax errors were only noted on the panic log, and the return code from
4685 the command was 0. By re-arranging the code a little, I've made the
4686 decoding happen first, so such errors now appear on stderr, and the return
4687 code is 1. However, the actual setting up of the sockets still happens in
4688 the disconnected process, so errors there are still only recorded on the
4691 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4692 connections (as happens on some IP stacks) was logged at start up time as
4693 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4694 it from "IPv6 and IPv4", which means that two separate sockets are being
4697 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4698 says whether AF_INET or AF_INET6 was passed as an argument.
4700 42. Exiwhat output was messed up when time zones were included in log
4703 43. Exiwhat now gives more information about the daemon's listening ports,
4704 and whether -tls-on-connect was used.
4706 44. The "port" option of the smtp transport is now expanded.
4708 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4709 silently ignored. Now an error message is written to the main and panic
4712 46. There's a new ACL modifier called "logwrite" which writes to a log file
4713 as soon as it is encountered.
4715 47. Added $local_user_uid and $local_user_gid at routing time.
4717 48. Exim crashed when trying to verify a sender address that was being
4720 49. Exim was recognizing only a space character after ".include". It now also
4721 recognizes a tab character.
4723 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4724 extracting the relevant information from the specification. The man page no
4725 longer contains scrambled data for the -d option, and I've added a section
4726 at the front about calling Exim under different names.
4728 51. Added "extra_headers" argument to the "mail" command in filter files.
4730 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4733 53. Installed eximstats 1.29.
4735 54. Added transport_filter_timeout as a generic transport option.
4737 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4738 Cc: header lines. This was required by RFC 822, but it not required by RFC
4741 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4742 incoming messages that did not have them. Now it does so only if the
4743 message originates locally, that is, if there is no associated remote host
4744 address. When Resent- header lines are present, this applies to the Resent-
4745 lines rather than the non-Resent- lines.
4747 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4748 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4750 58. Messages for configuration errors now include the name of the main
4751 configuration file - useful now that there may be more than one file in a
4752 list (.included file names were always shown).
4754 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4755 for those rare installations that do not start the daemon as root or run it
4756 setuid root. I've cut out the call to initgroups() if the daemon is not
4759 60. The Exim user and group can now be bound into the binary as text strings
4760 that are looked up at the start of Exim's processing.
4762 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4764 62. Added $mailstore_basename variable.
4766 63. Installed patch to sieve.c from Michael Haardt.
4768 64. When Exim failed to open the panic log after failing to open the main log,
4769 the original message it was trying to log was written to stderr and debug
4770 output, but if they were not available (the usual case in production), it
4771 was lost. Now it is written to syslog before the two lines that record the
4772 failures to open the logs.
4774 65. Users' Exim filters run in subprocesses under the user's uid. It is
4775 possible for a "deliver" command or an alias in a "personal" command to
4776 provoke an address rewrite. If logging of address rewriting is configured,
4777 this fails because the process is not running as root or exim. There may be
4778 a better way of dealing with this, but for the moment (because 4.30 needs
4779 to be released), I have disabled address rewrite logging when running a
4780 filter in a non-root, non-exim process.
4786 1. The buildconfig auxiliary program wasn't quoting the value set for
4787 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4788 not defined. This bug was masked in 4.22 by the effect that was fixed in
4791 2. Some messages that were rejected after a message id was allocated were
4792 shown as "incomplete" by exigrep. It no longer does this for messages that
4793 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4795 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4796 have allow_domain_literals set, the ID did not get logged in the <= line.
4797 Domain literals are now always recognized in Message-ID: header lines.
4799 4. The first argument for a ${extract expansion item is the key name or field
4800 number. Leading and trailing spaces in this item were not being ignored,
4801 causing some misleading effects.
4803 5. When deliver_drop_privilege was set, single queue runner processes started
4804 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4805 same command in the process it spins off) were not dropping privilege.
4807 6. When the daemon running as "exim" started a queue runner, it always
4808 re-executed Exim in the spun-off process. This is a waste of effort when
4809 deliver_drop_privilege is set. The new process now just calls the
4810 queue-runner function directly.
4816 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4819 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4820 ignored. Though the use of -oP was forcing the writing of a pid file, it
4821 was always written to the default place.
4823 3. If the message "no IP address found for host xxxx" is generated during
4824 incoming verification, it is now followed by identification of the incoming
4825 connection (so you can more easily find what provoked it).
4827 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4829 5. Added some features to "harden" Exim a bit more against certain attacks:
4831 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4832 be put in Local/Makefile. This is like the never_users runtime option,
4833 but it cannot be overridden. The default setting is "root".
4835 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4836 prefix string with which any file named in a -C command line option
4839 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4840 is retained for -C and -D only if the caller of Exim is root. Without
4841 it, the exim user may also use -C and -D and retain privilege.
4843 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4844 command line option is disabled.
4846 6. Macro names set by the -D option must start with an upper case letter, just
4847 like macro names defined in the configuration file.
4849 7. Added "dereference=" facility to LDAP.
4851 8. Two instances of the typo "uknown" in the source files are fixed.
4853 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4854 the Configure-Makefile script screwed up while processing it.
4856 10. Incorporated PCRE 4.4.
4858 11. The SMTP synchronization check was not operating right at the start of an
4859 SMTP session. For example, it could not catch a HELO sent before the client
4860 waited for the greeting. There is now a check for outstanding input at the
4861 point when the greeting is written. Because of the duplex, asynchronous
4862 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4863 way, but not yet received, when the check is performed.
4865 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4866 on TCP/IP sockets, because this apparently causes some broken clients to
4869 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4870 unchanged) from the Cygwin maintainer.
4872 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4873 was supported instead of testing for mbx. Effectively a typo.
4875 15. The spa authenticator server code was not checking that the input it
4876 received was valid base64.
4878 16. The debug output line for the "set" modifier in ACLs was not showing the
4879 name of the variable that was being set.
4881 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4883 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4884 lookup on its own. Something else was needed to trigger the lookup. For
4885 example, a match in host_lookup or the need for a host name in a host list.
4886 Now, if $sender_host_name is referenced and the host name has not yet been
4887 looked up, a lookup is performed. If the lookup fails, the variable remains
4888 empty, and $host_lookup_failed is set to "1".
4890 19. Added "eqi" as a case-independent comparison operator.
4892 20. The saslauthd authentication condition could segfault if neither service
4893 nor realm was specified.
4895 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4896 error message that was logged was misleading, and incoming SMTP
4897 connections were dropped. The message is now more accurate, and temporary
4898 errors are given to SMTP connections.
4900 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4901 (except RSET) with a 421 error, until QUIT is received. However, it was
4902 failing to send a response to QUIT.
4904 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4905 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4906 ACL is now run after the helo_try_verify_hosts code.
4908 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4909 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4910 case-independent, so other case variants are also recognized). Apparently
4911 some systems use these upper case variants.
4913 25. If more than two messages were waiting for the same host, and a transport
4914 filter was specified for the transport, Exim sent two messages over the
4915 same TCP/IP connection, and then failed with "socket operation on non-
4916 socket" when it tried to send the third.
4918 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4920 27. The extern definition of crypt16() in expand.c was not being excluded when
4921 the OS had its own crypt16() function.
4923 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4924 as a preferred synonym for return_size_limit, both as an option and as an
4927 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4929 30. Changed the default configuration ACL to relax the local part checking rule
4930 for addresses that are not in any local domains. For these addresses,
4931 slashes and pipe symbols are allowed within local parts, but the sequence
4932 /../ is explicitly forbidden.
4934 31. SPA server authentication was not clearing the challenge buffer before
4937 32. log_message in a "warn" ACL statement was writing to the reject log as
4938 well as to the main log, which contradicts the documentation and doesn't
4939 seem right (because no rejection is happening). So I have stopped it.
4941 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4942 However, I am unable to do any testing of this.
4944 34. Fixed an infelicity in the appendfile transport. When checking directories
4945 for a mailbox, to see if any needed to be created, it was accidentally
4946 using path names with one or more superfluous leading slashes; tracing
4947 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4949 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4950 contents are added to the log line that is written for every discarded
4951 recipient. (Previously a log_message setting was ignored.)
4953 36. The ${quote: operator now quotes the string if it is empty.
4955 37. The install script runs exim in order to find its version number. If for
4956 some reason other than non-existence or emptiness, which it checks, it
4957 could not run './exim', it was installing it with an empty version number,
4958 i.e. as "exim-". This error state is now caught, and the installation is
4961 38. An argument was missing from the function that creates an error message
4962 when Exim fails to connect to the socket for saslauthd authentication.
4963 This could cause Exim to crash, or give a corrupted message.
4965 39. Added isip, isip4, and isip6 to ${if conditions.
4967 40. The ACL variables $acl_xx are now saved with the message, and can be
4968 accessed later in routers, transports, and filters.
4970 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4971 strings in the file are not string-expanded.
4973 42. If a MAIL command specified a SIZE value that was too large to fit into an
4974 int variable, the check against message_size_limit failed. Such values are
4975 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4976 day this will have to be increased, but I don't think I want to be around
4977 when emails are that large.
4984 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4985 iconv() is not standard in FreeBSD.
4987 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4988 IPv6 enabled. The observed symptom was a segmentation fault on return from
4989 the function os_common_find_running_interfaces() in src/os.c.
4991 3. In the check_special_case() function in daemon.c I had used "errno" as an
4992 argument name, which causes warnings on some systems. This was basically a
4993 typo, since it was named "eno" in the comments!
4995 4. The code that waits for the clock to tick (at a resolution of some fraction
4996 of a second) so as to ensure message-id uniqueness was always waiting for
4997 at least one whole tick, when it could have waited for less. [This is
4998 almost certainly not relevant at current processor speeds, where it is
4999 unlikely to ever wait at all. But we try to future-proof.]
5001 5. The function that sleeps for a time interval that includes fractions of a
5002 second contained a race. It did not block SIGALRM between setting the
5003 timer, and suspending (a couple of lines later). If the interval was short
5004 and the sigsuspend() was delayed until after it had expired, the suspension
5005 never ended. On busy systems this could lead to processes getting stuck for
5008 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5009 process, before it forks any delivery processes. The open lookup caching
5010 mechanism meant that the open file or database connection was passed into
5011 the delivery process. The problem was that delivery processes always tidy
5012 up cached lookup data. This could cause a problem for the next delivery
5013 process started by the queue runner, because the external queue runner
5014 process does not know about the closure. So the next delivery process
5015 still has data in the lookup cache. In the case of a file lookup, there was
5016 no problem because closing a file descriptor in a subprocess doesn't affect
5017 the parent. However, if the lookup was caching a connection to a database,
5018 the connection was closed, and the second delivery process was likely to
5019 see errors such as "PGSQL: query failed: server closed the connection
5020 unexpectedly". The problem has been fixed by closing all cached lookups
5021 in a queue runner before running a delivery process.
5023 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5024 seem to have the "const" qualifier which it has on other OS. I've
5027 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5028 *of the same type* (client or server) with the same public name that an
5029 error should be diagnosed.
5031 9. When Exim looked up a host name for an IP address, but failed to find the
5032 original IP address when looking up the host name (a safety check), it
5033 output the message "<ip address> does not match any IP for NULL", which was
5034 confusing, to say the least. The bug was that the host name should have
5035 appeared instead of "NULL".
5037 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5038 user that is built into the binary, and the -C or -D options is used, root
5039 privilege is dropped before the configuration file is read. In addition,
5040 logging is switched to stderr instead of the normal log files. If the
5041 configuration then re-defines the Exim user, the unprivileged environment
5042 is probably not what is expected, so Exim logs a panic warning message (but
5045 However, if deliver_drop_privilege is set, the unprivileged state may well
5046 be exactly what is intended, so the warning has been cut out in that case,
5047 and Exim is allowed to try to write to its normal log files.
5053 1. smtp_return_error_details was not giving details for temporary sender
5054 or receiver verification errors.
5056 2. Diagnose a configuration error if two authenticators have the same public
5059 3. Exim used not to create the message log file for a message until the first
5060 delivery attempt. This could be confusing when incoming messages were held
5061 for policy or load reasons. The message log file is now created at the time
5062 the message is received, and an initial "Received" line is written to it.
5064 4. The automatically generated man page for command line options had a minor
5065 bug that caused no ill effects; however, a more serious problem was that
5066 the procedure for building the man page automatically didn't always
5067 operate. Consequently, release 4.20 contains an out-of-date version. This
5068 shouldn't happen again.
5070 5. When building Exim with embedded Perl support, the script that builds the
5071 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5072 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5074 6. The freeze_tell option was not being used for messages that were frozen on
5075 arrival, either by an ACL or by local_scan().
5077 7. Added the smtp_incomplete_transaction log selector.
5079 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5080 was accepting AUTH without a new EHLO.
5082 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5083 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5086 10. Logging of TCP/IP connections (when configured) now happens in the main
5087 daemon process instead of the child process, so that the TCP/IP connection
5088 count is more accurate (but it can never be perfect).
5090 11. The use of "drop" in a nested ACL was not being handled correctly in the
5091 outer ACL. Now, if condition failure induced by the nested "drop" causes
5092 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5093 or "require"), the connection is dropped.
5095 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5096 that yield "discard" can now be used with an "accept" or a "discard" verb,
5097 but an error is generated for any others (because I can't see a useful way
5098 to define what should happen).
5100 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5101 are now processed in the same way as lines in the Exim configuration file.
5102 In particular, continuation lines are supported.
5104 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5106 15. Added -ti meaning -t -i.
5108 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5109 domains, and warn by logging if others are found.
5111 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5112 returned from GIFCONF when Exim is trying to find the list of interfaces on
5113 a host. The code in os.c has been modified to copy each ifreq to an aligned
5114 structure in all cases.
5116 Also, in some cases, the returned ifreq's were being copied to a 'struct
5117 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5118 means the last couple of bytes of an IPv6 address could be chopped if the
5119 ifreq contained only a normal sockaddr (14 bytes storage).
5121 18. Named domain lists were not supported in the hosts_treat_as_local option.
5122 An entry such as +xxxx was not recognized, and was treated as a literal
5125 19. Ensure that header lines added by a DATA ACL are included in the reject log
5126 if the ACL subsequently rejects the message.
5128 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5129 MD5 (which is deprecated).
5131 21. When testing a filter file using -bf, Exim was writing a message when it
5132 took the sender from a "From " line in the message, but it was not doing so
5133 when it took $return_path from a Return-Path: header line. It now does.
5135 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5136 with a valid header line field name (a series of printing characters
5137 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5139 23. Changed "disc" in the source to "disk" to conform to the documentation and
5140 the book and for uniformity.
5142 24. Ignore Sendmail's -Ooption=value command line item.
5144 25. When execve() failed while trying to run a command in a pipe transport,
5145 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5146 could be confused with a return value of 69 from the command itself. This
5147 has been changed to 127, the value the shell returns if it is asked to run
5148 a non-existent command. The wording for the related log line suggests a
5149 non-existent command as the problem.
5151 26. If received_header_text expands to an empty string, do not add a Received:
5152 header line to the message. (Well, it adds a token one on the spool, but
5153 marks it "old" so that it doesn't get used or transmitted.)
5155 27. Installed eximstats 1.28 (addition of -nt option).
5157 28. There was no check for failure on the call to getsockname() in the daemon
5158 code. This can fail if there is a shortage of resources on the system, with
5159 ENOMEM, for example. A temporary error is now given on failure.
5161 29. Contrary to the C standard, it seems that in some environments, the
5162 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5163 program. Exim now does this explicitly; it affects the formatting of
5164 timestamps using strftime().
5166 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5167 complaints. I've now initialized all the variables, to avoid this.
5169 32. Header lines added by a system filter were not being "seen" during
5170 transport-time rewrites.
5172 33. The info_callback() function passed to OpenSSL is set up with type void
5173 (*)(SSL *, int, int), as described somewhere. However, when calling the
5174 function (actually a macro) that sets it up, the type void(*)() is
5175 expected. I've put in a cast to prevent warnings from picky compilers.
5177 34. If a DNS black list lookup found a CNAME record, but there were no A
5178 records associated with the domain it pointed at, Exim crashed.
5180 35. If a DNS black list lookup returned more than one A record, Exim ignored
5181 all but the first. It now scans all returned addresses if a particular IP
5182 value is being sought. In this situation, the contents of the
5183 $dnslist_value variable are a list of all the addresses, separated by a
5186 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5187 to accept a host name and all its aliases if the forward lookup for any of
5188 them yielded the IP address of the incoming connection. Now it accepts only
5189 those names whose forward lookup yields the correct IP address. Any other
5190 names are discarded. This closes a loophole whereby a rogue DNS
5191 administrator could create reverse DNS records to break through a
5192 wildcarded host restriction in an ACL.
5194 37. If a user filter or a system filter that ran in a subprocess used any of
5195 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5196 the wrong values were passed to the pipe command ($thisaddress had the
5197 value of $0, $0 had the value of $1, etc). This bug was introduced by
5198 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5200 38. Improved the line breaking for long SMTP error messages from ACLs.
5201 Previously, if there was no break point between 40 and 75 characters, Exim
5202 left the rest of the message alone. Two changes have been made: (a) I've
5203 reduced the minimum length to 35 characters; (b) if it can't find a break
5204 point between 35 and 75 characters, it looks ahead and uses the first one
5205 that it finds. This may give the occasional overlong line, but at least the
5206 remaining text gets split now.
5208 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5209 file descriptors might be low, and that setting 1000 would always raise it.
5210 It turns out that in some environments, the limit is already over 1000 and
5211 that lowering it causes trouble. So now Exim takes care not to decrease it.
5213 40. When delivering a message, the value of $return_path is set to $sender_
5214 address at the start of routing (routers may change the value). By an
5215 oversight, this default was not being set up when an address was tested by
5216 -bt or -bv, which affected the outcome if any router or filter referred to
5219 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5220 log only when "message" or "log_message" are set. However, if one of the
5221 conditions was an address verification, or a call to a nested ACL, the
5222 messages generated by the underlying test were being passed through. This
5223 no longer happens. The underlying message is available in $acl_verify_
5224 message for both "message" and "log_message" expansions, so it can be
5225 passed through if needed.
5227 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5228 new expansion $bh_ to give the encoded byte string without charset
5229 translation. Translation happens only if iconv() is available; HAVE_ICONV
5230 indicates this at build time. HEADERS_CHARSET gives the charset to
5231 translate to; headers_charset can change it in the configuration, and
5232 "headers charset" can change it in an individual filter file.
5234 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5235 that creates RFC 2047 encoded "words" labels them as that charset instead
5236 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5237 expansion operator; (ii) when Exim creates a From: line for a local
5238 message; (iii) when a header line is rewritten to include a "phrase" part.
5240 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5241 buggy, causing it to skip the first lines of messages whose message ID
5242 ended in 'D'. This would not have bitten before Exim release 4.14, because
5243 message IDs were unlikely to end in 'D' before then. The effect was to have
5244 incorrect size information for certain domains.
5246 45. #include "config.h" was missing at the start of the crypt16.c module. This
5247 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5250 46. If there was a timeout during a "random" callout check, Exim treated it as
5251 a failure of the random address, and carried on sending RSET and the real
5252 address. If the delay was just some slowness somewhere, the response to the
5253 original RCPT would be taken as a response to RSET and so on, causing
5254 mayhem of various kinds.
5256 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5257 when I implemented it. It didn't allow for the fact that some option values
5258 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5259 the right test for positive values.
5261 48. Domain names in DNS records are case-independent. Exim always looks them up
5262 in lower case. Some resolvers return domain names in exactly the case they
5263 appear in the zone file, that is, they may contain uppercase letters. Not
5264 all resolvers do this - some return always lower case. Exim was treating a
5265 change of case by a resolver as a change of domain, similar to a widening
5266 of a domain abbreviation. This triggered its re-routing code and so it was
5267 trying to route what was effectively the same domain again. This normally
5268 caused routing to fail (because the router wouldn't handle the domain
5269 twice). Now Exim checks for this case specially, and just changes the
5270 casing of the domain that it ultimately uses when it transmits the message
5273 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5276 50. If a filter generated a file delivery with a non-absolute name (possible if
5277 no home directory exists for the router), the forbid_file option was not
5280 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5281 the existing equality matching.
5283 52. Exim was using ints instead of ino_t variables in some places where it was
5284 dealing with inode numbers.
5286 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5287 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5288 called TMPDIR, and if it finds it is different, it changes its value.
5290 54. The smtp_printf() function is now made available to local_scan() so
5291 additional output lines can be written before returning. There is also an
5292 smtp_fflush() function to enable the detection of a dropped connection.
5293 The variables smtp_input and smtp_batched_input are exported to
5296 55. Changed the default runtime configuration: the message "Unknown user"
5297 has been removed from the ACL, and instead placed on the localuser router,
5298 using the cannot_route_message feature. This means that any verification
5299 failures that generate their own messages won't get overridden. Similarly,
5300 the "Unrouteable address" message that was in the ACL for unverifiable
5301 relay addresses has also been removed.
5303 56. Added hosts_avoid_esmtp to the smtp transport.
5305 57. The exicyclog script was not checking for the esoteric option
5306 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5307 will work only if exicyclog is run under the appropriate euid.
5309 58. Following a discussion on the list, the rules by which Exim recognises line
5310 endings on incoming messages have been changed. The -dropcr and drop_cr
5311 options are now no-ops, retained only for backwards compatibility. The
5312 following line terminators are recognized: LF CRLF CR. However, special
5313 processing applies to CR:
5315 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5316 nor a local message in the state where . is a terminator.
5318 (ii) If a bare CR is encountered in a header line, an extra space is added
5319 after the line terminator so as not to end the header. The reasoning
5320 behind this is that bare CRs in header lines are most likely either
5321 to be mistakes, or people trying to play silly games.
5323 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5324 was being incorrectly given as 18 bytes larger than it should have been.
5325 This is a VOB (very old bug).
5327 60. This may never have affected anything current, but just in case it has:
5328 When the local host is found other than at the start of a list of hosts,
5329 the local host, those with the same MX, and any that follow, are discarded.
5330 When the list in question was part of a longer list of hosts, the following
5331 hosts (not currently being processed) were also being discarded. This no
5332 longer happens. I'm not sure if this situation could ever has previously
5335 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5338 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5339 header. This is something that is recommended in a new Internet Draft, and
5340 is something that is documented as being done by Sendmail. There are two
5341 possible values. For messages generated by the autoreply transport, Exim
5344 Auto-Submitted: auto-replied
5346 whereas for all other generated messages (e.g. bounces) it adds
5348 Auto-Submitted: auto-generated
5350 63. The "personal" condition in filters now includes a test for the
5351 Auto-Submitted: header. If it contains the string "auto-" the message it
5352 not considered personal.
5354 64. Added rcpt_include_affixes as a generic transport option.
5356 65. Added queue_only_override (default true).
5358 66. Added the syslog_duplication option.
5360 67. If what should have been the first header line of a message consisted of
5361 a space followed by a colon, Exim was mis-interpreting it as a header line.
5362 It isn't of course - it is syntactically invalid and should therefore be
5363 treated as the start of the message body. The misbehaviour could have
5364 caused a number of strange effects, including loss of data in subsequent
5365 header lines, and spool format errors.
5367 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5368 client host had authenticated. This control can now be exercised by an ACL
5369 for more flexibility.
5371 69. By default, callouts do not happen when testing with -bh. There is now a
5372 variant, -bhc, which does actually run the callout code, including
5373 consulting and updating the callout cache.
5375 70. Added support for saslauthd authentication, courtesy of Alexander
5378 71. If statvfs() failed on the spool or log directories while checking their
5379 size for availability, Exim confusingly gave the error "space shortage".
5380 Furthermore, in debugging mode it crashed with a floating point exception.
5381 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5382 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5383 serious problem, Exim now writes to the main and panic logs when this
5384 happens, with details of the failure. It then refuses to accept the
5385 incoming message, giving the message "spool directory problem" or "log
5386 directory problem" with a 421 code for SMTP messages.
5388 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5389 0, 1, and 2 exist, because some OS complain for execs without them (see
5390 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5391 descriptors. However, the code omitted to check that the open succeeded,
5392 causing mysterious errors if for some reason the permissions on /dev/null
5393 got screwed. Now Exim writes a message to the main and panic logs, and
5394 bombs out if it can't open /dev/null.
5396 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5397 interact so that it is all more flexible. It is supposed to remain
5398 backwards compatible. Also added extra_local_interfaces.
5400 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5401 to bomb out with an assertion failure - to the client this appears as a
5402 connection drop. This problem occurs in the part of the code that was taken
5403 from the Samba project. Fortunately, the assertion is in a very simple
5404 function, so I have fixed this by reproducing the function inline in the
5405 one place where it is called, and arranging for authentication to fail
5406 instead of killing the process with assert().
5408 75. The SPA client code was not working when the server requested OEM rather
5409 than Unicode encoding.
5411 76. Added code to make require_files with a specific uid setting more usable in
5412 the case where statting the file as root fails - usually a non-root-mounted
5413 NFS file system. When this happens and the failure is EACCES, Exim now
5414 forks a subprocess and does the per-uid checking as the relevant uid.
5416 77. Added process_log_path.
5418 78. If log_file_path was not explicitly set, a setting of check_log_space or
5419 check_log_inodes was ignored.
5421 79. If a space check for the spool or log partitions fails, the incident is now
5422 logged. Of course, in the latter case the data may get lost...
5424 80. Added the %p formatting code to string_format() so that it can be used to
5425 print addresses in debug_print(). Adjusted all the address printing in the
5426 debugging in store.c to use %p rather than %d.
5428 81. There was a concern that a line of code in smtp_in.c could overflow a
5429 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5430 initially expressed, the concern was not well-founded, because trailing
5431 spaces are removed early. However, if the trailing spaces were followed by
5432 a NULL, they did not get removed, so the overflow was possible. Two fixes
5435 (a) I re-wrote the offending code in a cleaner fashion.
5436 (b) If an incoming SMTP command contains a NULL character, it is rejected
5439 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5440 runs initgroups(), so that if the Exim user is in any additional groups,
5441 they will be used during message reception.
5447 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob