1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PP/01 Solaris build fix for Oracle's LDAP libraries.
10 Bugzilla 1109, patch from Stephen Usher.
16 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
18 PP/02 Harmonised TLS library version reporting; only show if debugging.
19 Layout now matches that introduced for other libraries in 4.74 PP/03.
21 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
23 PP/04 New "dns_use_edns0" global option.
25 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
28 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
29 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
31 TK/01 Updated PolarSSL code to 0.14.2.
32 Bugzilla 1097. Patch from Andreas Metzler.
34 PP/07 Catch divide-by-zero in ${eval:...}.
37 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
40 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
41 format-string attack -- SECURITY: remote arbitrary code execution.
43 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
44 time unintentionally subject to list matching rules, letting the header
45 cause arbitrary Exim lookups (of items which can occur in lists, *not*
46 arbitrary string expansion). This allowed for information disclosure.
48 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
49 INT_MIN/-1 -- value coerced to INT_MAX.
55 NM/01 Workround for PCRE version dependency in version reporting
58 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
59 This fixes portability to compilers other than gcc, notably
60 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
62 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
63 makefiles for portability to HP-UX and POSIX correctness.
65 PP/01 Permit LOOKUP_foo enabling on the make command-line.
66 Also via indented variable definition in the Makefile.
67 (Debugging by Oliver Heesakkers).
69 PP/02 Restore caching of spamd results with expanded spamd_address.
70 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
72 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
73 Improves build reliability. Fix from: Frank Elsner
75 NM/02 Fix wide character breakage in the rfc2047 coding
76 Fixes bug 1064. Patch from Andrey N. Oktyabrski
78 NM/03 Allow underscore in dnslist lookups
79 Fixes bug 1026. Patch from Graeme Fowler
81 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
82 Code patches from Adam Ciarcinski of NetBSD.
84 NM/04 Fixed exiqgrep to cope with mailq missing size issue
87 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
88 is logged, to avoid truncation. Patch from John Horne.
90 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
91 Patch from Jakob Hirsch.
93 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
94 SQL string expansion failure details.
95 Patch from Andrey Oktyabrski.
97 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
98 Patch from Simon Arlott.
100 PP/09 New lookups functionality failed to compile on old gcc which rejects
101 extern declarations in function scope.
102 Patch from Oliver Fleischmann
104 PP/10 Use sig_atomic_t for flags set from signal handlers.
105 Check getgroups() return and improve debugging.
106 Fixed developed for diagnosis in bug 927 (which turned out to be
109 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
110 Patch from Mark Zealey.
112 PP/12 Bugzilla 1056: Improved spamd server selection.
113 Patch from Mark Zealey.
115 PP/13 Bugzilla 1086: Deal with maildir quota file races.
116 Based on patch from Heiko Schlittermann.
118 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
119 Patch from Uwe Doering, sign-off by Michael Haardt.
121 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
122 variable declaration deep within a block. Bug and patch from
125 PP/15 lookups-Makefile IRIX compatibilty coercion.
127 PP/16 Make DISABLE_DKIM build knob functional.
129 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
130 Patch by Simon Arlott
132 TF/03 Fix valgrind.h portability to C89 compilers that do not support
133 variable argument macros. Our copy now differs from upstream.
139 TF/01 Failure to get a lock on a hints database can have serious
140 consequences so log it to the panic log.
142 TF/02 Log LMTP confirmation messages in the same way as SMTP,
143 controlled using the smtp_confirmation log selector.
145 TF/03 Include the error message when we fail to unlink a spool file.
147 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
148 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
149 for maintaining out-of-tree patches for some time.
151 PP/01 Bugzilla 139: Documentation and portability issues.
152 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
153 Handle per-OS dynamic-module compilation flags.
155 PP/02 Let /dev/null have normal permissions.
156 The 4.73 fixes were a little too stringent and complained about the
157 permissions on /dev/null. Exempt it from some checks.
158 Reported by Andreas M. Kirchwitz.
160 PP/03 Report version information for many libraries, including
161 Exim version information for dynamically loaded libraries. Created
162 version.h, now support a version extension string for distributors
163 who patch heavily. Dynamic module ABI change.
165 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
166 privilege escalation vulnerability whereby the Exim run-time user
167 can cause root to append content of the attacker's choosing to
170 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
173 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
174 If dropping privileges for untrusted macros, we disabled normal logging
175 on the basis that it would fail; for the Exim run-time user, this is not
176 the case, and it resulted in successful deliveries going unlogged.
177 Fixed. Reported by Andreas Metzler.
183 PP/01 Date: & Message-Id: revert to normally being appended to a message,
184 only prepend for the Resent-* case. Fixes regression introduced in
185 Exim 4.70 by NM/22 for Bugzilla 607.
187 PP/02 Include check_rfc2047_length in configure.default because we're seeing
188 increasing numbers of administrators be bitten by this.
190 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
192 PP/03 Bugzilla 994: added openssl_options main configuration option.
194 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
196 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
198 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
200 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
201 without a peer certificate, leading to a segfault because of an
202 assumption that peers always have certificates. Be a little more
203 paranoid. Problem reported by Martin Tscholak.
205 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
206 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
207 NB: ClamAV planning to remove STREAM in "middle of 2010".
208 CL also introduces -bmalware, various -d+acl logging additions and
209 more caution in buffer sizes.
211 PP/09 Implemented reverse_ip expansion operator.
213 PP/10 Bugzilla 937: provide a "debug" ACL control.
215 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
217 PP/12 Bugzilla 973: Implement --version.
219 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
221 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
223 PP/15 Bugzilla 816: support multiple condition rules on Routers.
225 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
226 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
227 ignore trailing whitespace.
229 JJ/02 prevent non-panic DKIM error from being sent to paniclog
231 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
234 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
235 Notification from Dr Andrew Aitchison.
237 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
238 ExtendedDetectionInfo response format.
239 Notification from John Horne.
241 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
244 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
245 XSL and documented dependency on system catalogs, with examples of how
248 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
251 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
252 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
253 configuration file which is writeable by the Exim user or group.
255 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
256 of configuration files to cover files specified with the -C option if
257 they are going to be used with root privileges, not just the default
260 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
261 option (effectively making it always true).
263 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
264 files to be used while preserving root privileges.
266 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
267 that rogue child processes cannot use them.
269 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
270 run-time user, instead of root.
272 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
273 Exim run-time user without dropping privileges.
275 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
276 result string, instead of calling string_vformat() twice with the same
279 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
280 for other users. Others should always drop root privileges if they use
281 -C on the command line, even for a whitelisted configure file.
283 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
285 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
291 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
292 $data_path, and $header_path variables; fixed documentation bugs and
295 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
296 exipick to access non-standard spools, including the "frozen" queue
299 NM/01 Bugzilla 965: Support mysql stored procedures.
300 Patch from Alain Williams
302 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
304 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
305 Patch from Andreas Metzler
307 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
308 Patch from Kirill Miazine
310 NM/05 Bugzilla 671: Added umask to procmail example.
312 JJ/03 installed exipick 20100323.0, fixing doc bug
314 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
315 directory. Notification and patch from Dan Rosenberg.
317 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
319 TK/02 Improve log output when DKIM signing operation fails.
321 MH/01 Treat the transport option dkim_domain as a colon separated
322 list, not as a single string, and sign the message with each element,
323 omitting multiple occurences of the same signer.
325 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
326 Bugzilla 985, 986. Patch by Simon Arlott
328 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
329 Patch by Simon Arlott
331 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
332 MBX locking. Notification from Dan Rosenberg.
338 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
340 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
342 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
344 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
346 NM/04 Bugzilla 915: Flag broken perl installation during build.
352 TK/01 Added patch by Johannes Berg that expands the main option
353 "spamd_address" if it starts with a dollar sign.
355 TK/02 Write list of recipients to X-Envelope-Sender header when building
356 the mbox-format spool file for content scanning (suggested by Jakob
359 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
360 (http://www.dcc-servers.net/) support via dccifd. Activated by
361 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
363 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
364 by Mark Daniel Reidel <mr@df.eu>.
366 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
367 When building exim an external PCRE library is now needed -
368 PCRE is a system library on the majority of modern systems.
369 See entry on PCRE_LIBS in EDITME file.
371 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
372 conversation. Added nologin parameter to request.
373 Patch contributed by Kirill Miazine.
375 TF/01 Do not log submission mode rewrites if they do not change the address.
377 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
379 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
380 log files in place. Contributed by Roberto Lima.
382 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
384 TF/03 Bugzilla 615: When checking the local_parts router precondition
385 after a local_part_suffix or local_part_prefix option, Exim now
386 does not use the address's named list lookup cache, since this
387 contains cached lookups for the whole local part.
389 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
390 Robert Millan. Documentation is in experimental-spec.txt.
392 TF/04 Bugzilla 668: Fix parallel build (make -j).
394 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
396 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
397 Patch provided by Jan Srzednicki.
399 TF/05 Leading white space used to be stripped from $spam_report which
400 wrecked the formatting. Now it is preserved.
402 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
403 that they are available at delivery time.
405 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
407 TF/08 TLS error reporting now respects the incoming_interface and
408 incoming_port log selectors.
410 TF/09 Produce a more useful error message if an SMTP transport's hosts
411 setting expands to an empty string.
413 NM/06 Bugzilla 744: EXPN did not work under TLS.
414 Patch provided by Phil Pennock.
416 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
417 Patch provided by Richard Godbee.
419 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
420 acl_smtp_notquit, added index entry.
422 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
423 Patch provided by Eugene Bujak.
425 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
426 accept(). Patch provided by Maxim Dounin.
428 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
429 Patch provided by Phil Pennock.
431 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
433 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
434 Patch provided by Brad "anomie" Jorsch.
436 NM/14 Bugzilla 622: Added timeout setting to transport filter.
437 Patch provided by Dean Brooks.
439 TK/05 Add native DKIM support (does not depend on external libraries).
441 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
442 Patch provided by Graeme Fowler.
444 NM/16 Bugzilla 851: Documentation example syntax fix.
446 NM/17 Changed NOTICE file to remove references to embedded PCRE.
448 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
451 NM/19 Bugzilla 745: TLS version reporting.
452 Patch provided by Phil Pennock.
454 NM/20 Bugzilla 167: bool: condition support.
455 Patch provided by Phil Pennock.
457 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
458 clients. Patch provided by Phil Pennock.
460 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
461 Patch provided by Brad "anomie" Jorsch.
463 NM/23 Bugzilla 687: Fix misparses in eximstats.
464 Patch provided by Heiko Schlittermann.
466 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
467 Patch provided by Heiko Schlittermann.
469 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
470 plus update to original patch.
472 NM/26 Bugzilla 799: Documentation correction for ratelimit.
474 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
475 Patch provided by David Brownlee.
477 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
479 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
481 NM/30 Bugzilla 888: TLS documentation bugfixes.
483 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
485 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
486 Unlike the original bugzilla I have changed all shell scripts in src tree.
488 NM/33 Bugzilla 898: Transport filter timeout fix.
489 Patch by Todd Rinaldo.
491 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
492 Patch by Serge Demonchaux.
494 NM/35 Bugzilla 39: Base64 decode bug fixes.
495 Patch by Jakob Hirsch.
497 NM/36 Bugzilla 909: Correct connect() call in dcc code.
499 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
501 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
503 NM/39 Bugzilla 911: Fixed MakeLinks build script.
509 TK/01 Add preliminary DKIM support. Currently requires a forked version of
510 ALT-N's libdkim that I have put here:
511 http://duncanthrax.net/exim-experimental/
513 Note to Michael Haardt: I had to rename some vars in sieve.c. They
514 were called 'true' and it seems that C99 defines that as a reserved
515 keyword to be used with 'bool' variable types. That means you could
516 not include C99-style headers which use bools without triggering
517 build errors in sieve.c.
519 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
520 as mailq or other aliases. Changed the --help handling significantly
521 to do whats expected. exim_usage() emits usage/help information.
523 SC/01 Added the -bylocaldomain option to eximstats.
525 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
527 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
529 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
535 PH/01 Another patch from the Sieve maintainer.
537 PH/02 When an IPv6 address is converted to a string for single-key lookup
538 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
539 dots are used instead of colons so that keys in lsearch files need not
540 contain colons. This was done some time before quoting was made available
541 in lsearch files. However, iplsearch files do require colons in IPv6 keys
542 (notated using the quote facility) so as to distinguish them from IPv4
543 keys. This meant that lookups for IP addresses in host lists did not work
544 for iplsearch lookups.
546 This has been fixed by arranging for IPv6 addresses to be expressed with
547 colons if the lookup type is iplsearch. This is not incompatible, because
548 previously such lookups could never work.
550 The situation is now rather anomolous, since one *can* have colons in
551 ordinary lsearch keys. However, making the change in all cases is
552 incompatible and would probably break a number of configurations.
554 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
557 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
558 conversion specification without a maximum field width, thereby enabling
559 a rogue spamd server to cause a buffer overflow. While nobody in their
560 right mind would setup Exim to query an untrusted spamd server, an
561 attacker that gains access to a server running spamd could potentially
562 exploit this vulnerability to run arbitrary code as the Exim user.
564 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
565 $primary_hostname instead of what libspf2 thinks the hosts name is.
567 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
568 a directory entry by the name of the lookup key. Previously, if a
569 symlink pointed to a non-existing file or a file in a directory that
570 Exim lacked permissions to read, a lookup for a key matching that
571 symlink would fail. Now it is enough that a matching directory entry
572 exists, symlink or not. (Bugzilla 503.)
574 PH/03 The body_linecount and body_zerocount variables are now exported in the
577 PH/04 Added the $dnslist_matched variable.
579 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
580 This means they are set thereafter only if the connection becomes
583 PH/06 Added the client_condition to authenticators so that some can be skipped
584 by clients under certain conditions.
586 PH/07 The error message for a badly-placed control=no_multiline_responses left
587 "_responses" off the end of the name.
589 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
591 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
592 (without spaces) instead of just copying the configuration text.
594 PH/10 Added the /noupdate option to the ratelimit ACL condition.
596 PH/11 Added $max_received_linelength.
598 PH/12 Added +ignore_defer and +include_defer to host lists.
600 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
601 way in which PCRE > 7.0 is built.
603 PH/14 Implemented queue_only_load_latch.
605 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
606 MAIL command. The effect was to mangle the value on 64-bit systems.
608 PH/16 Another patch from the Sieve maintainer.
610 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
612 PH/18 If a system quota error occurred while trying to create the file for
613 a maildir delivery, the message "Mailbox is full" was not appended to the
614 bounce if the delivery eventually timed out. Change 4.67/27 below applied
615 only to a quota excession during the actual writing of the file.
617 PH/19 It seems that peer DN values may contain newlines (and other non-printing
618 characters?) which causes problems in log lines. The DN values are now
619 passed through string_printing() before being added to log lines.
621 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
622 and InterBase are left for another time.)
624 PH/21 Added message_body_newlines option.
626 PH/22 Guard against possible overflow in moan_check_errorcopy().
628 PH/23 POSIX allows open() to be a macro; guard against that.
630 PH/24 If the recipient of an error message contained an @ in the local part
631 (suitably quoted, of course), incorrect values were put in $domain and
632 $local_part during the evaluation of errors_copy.
638 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
639 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
642 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
643 issue a MAIL command.
645 PH/02 In an ACL statement such as
647 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
649 if a client was not listed at all, or was listed with a value other than
650 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
651 the condition was not true (as it should be), so access was not denied.
652 The bug was that the ! inversion was incorrectly passed on to the second
653 item. This has been fixed.
655 PH/03 Added additional dnslists conditions == and =& which are different from
656 = and & when the dns lookup returns more than one IP address.
658 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
659 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
661 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
662 FSYNC, which compiles an option called disable_fsync that allows for
663 bypassing fsync(). The documentation is heavily laced with warnings.
665 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
667 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
668 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
669 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
670 including adding "make clean"; (3) Added -fPIC when compiling the test
671 dynamically loaded module, to get rid of a warning.
673 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
674 message fails, move_frozen_messages = true and ignore_bounce_errors_after
675 = 0s. The bug is otherwise harmless.
677 PH/07 There was a bug in the dovecot authenticator such that the value of
678 $auth1 could be overwritten, and so not correctly preserved, after a
679 successful authentication. This usually meant that the value preserved by
680 the server_setid option was incorrect.
682 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
684 PH/09 Installed PCRE release 7.0.
686 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
687 run for batched SMTP input. It is now run at the start of every message
688 in the batch. While fixing this I discovered that the process information
689 (output by running exiwhat) was not always getting set for -bs and -bS
690 input. This is fixed, and it now also says "batched" for BSMTP.
692 PH/11 Added control=no_pipelining.
694 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
695 patch, slightly modified), and move the expansion of helo_data till after
696 the connection is made in the smtp transport (so it can use these
699 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
701 PH/14 Added log_selector = +pid.
703 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
705 PH/16 Add ${if forany and ${if forall.
707 PH/17 Added dsn_from option to vary the From: line in DSNs.
709 PH/18 Flush SMTP output before performing a callout, unless control =
710 no_callout_flush is set.
712 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
713 was true (the default) a successful delivery failed to delete the retry
714 item, thus causing premature timeout of the address. The bug is now
717 PH/20 Added hosts_avoid_pipelining to the smtp transport.
719 PH/21 Long custom messages for fakedefer and fakereject are now split up
720 into multiline reponses in the same way that messages for "deny" and
721 other ACL rejections are.
723 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
724 with slight modification.
726 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
727 draft, changing the syntax and factoring some duplicate code".
729 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
730 for deliveries of the second and subsequent messages over the same SMTP
733 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
734 ${reduce, with only minor "tidies".
736 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
738 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
739 expansion side effects.
741 PH/27 When a message times out after an over-quota error from an Exim-imposed
742 quota, the bounce message says "mailbox is full". This message was not
743 being given when it was a system quota that was exceeded. It now should
746 MH/03 Made $recipients available in local_scan(). local_scan() already has
747 better access to the recipient list through recipients_list[], but
748 $recipients can be useful in postmaster-provided expansion strings.
750 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
751 in the case of a MAIL command with additional options following the
752 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
753 were accidentally chopped off.
755 PH/29 SMTP synchronization checks are implemented when a command is read -
756 there is a check that no more input is waiting when there shouldn't be
757 any. However, for some commands, a delay in an ACL can mean that it is
758 some time before the response is written. In this time, more input might
759 arrive, invalidly. So now there are extra checks after an ACL has run for
760 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
761 pipelining has not been advertised.
763 PH/30 MH's patch to allow iscntrl() characters to be list separators.
765 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
766 returned in the SMTP response when smtp_return_error_details was false.
769 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
770 instead of the C I/O that was originally supplied, because problems were
773 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
774 Exim which did not show up earlier: it was assuming that a call to
775 SSL_CTX_set_info_callback() might give an error value. In fact, there is
776 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
777 was a macro that became an assignment, so it seemed to work. This has
778 changed to a proper function call with a void return, hence the compile
779 error. Exim's code has been fixed.
781 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
784 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
786 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
788 PH/37 If a message is not accepted after it has had an id assigned (e.g.
789 because it turns out to be too big or there is a timeout) there is no
790 "Completed" line in the log. When some messages of this type were
791 selected by exigrep, they were listed as "not completed". Others were
792 picked up by some special patterns. I have improved the selection
793 criteria to be more general.
795 PH/38 The host_find_failed option in the manualroute router can now be set
796 to "ignore", to completely ignore a host whose IP address cannot be
797 found. If all hosts are ignored, the behaviour is controlled by the new
798 host_all_ignored option.
800 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
801 homing or because of multiple MX records with /mx) generated more than
802 one IP address, and the following item turned out to be the local host,
803 all the secondary addresses of the first item were incorrectly removed
804 from the list, along with the local host and any following hosts (which
805 is what is supposed to happen).
807 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
808 whoever called Exim into the -H file. In the case of the daemon it was
809 behaving confusingly. When first started, it used values for whoever
810 started the daemon, but after a SIGHUP it used the Exim user (because it
811 calls itself on a restart). I have changed the code so that it now always
814 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
815 message are rejected with the same error (e.g. no authentication or bad
816 sender address), and a DATA command is nevertheless sent (as can happen
817 with PIPELINING or a stupid MUA), the error message that was given to the
818 RCPT commands is included in the rejection of the DATA command. This is
819 intended to be helpful for MUAs that show only the final error to their
822 PH/42 Another patch from the Sieve maintainer.
824 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
825 Eximstats - Fixed some broken HTML links and added missing column headers
827 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
828 columns for Rejects, Temp Rejects, Ham, and Spam rows.
830 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
832 PH/43 Yet another patch from the Sieve maintainer.
834 PH/44 I found a way to check for a TCP/IP connection going away before sending
835 the response to the final '.' that terminates a message, but only in the
836 case where the client has not sent further data following the '.'
837 (unfortunately, this is allowed). However, in many cases there won't be
838 any further data because there won't be any more messages to send. A call
839 to select() can be used: if it shows that the input is "ready", there is
840 either input waiting, or the socket has been closed. An attempt to read
841 the next input character can distinguish the two cases. Previously, Exim
842 would have sent an OK response which the client would never have see.
843 This could lead to message repetition. This fix should cure that, at
844 least in a lot of common cases.
846 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
847 advertised in response to EHLO.
853 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
854 fixed by 4.65/MH/01 (is this a record?) are fixed:
856 (i) An empty string was always treated as zero by the numeric comparison
857 operators. This behaviour has been restored.
859 (ii) It is documented that the numeric comparison operators always treat
860 their arguments as decimal numbers. This was broken in that numbers
861 starting with 0 were being interpreted as octal.
863 While fixing these problems I realized that there was another issue that
864 hadn't been noticed. Values of message_size_limit (both the global option
865 and the transport option) were treated as octal if they started with 0.
866 The documentation was vague. These values are now always treated as
867 decimal, and I will make that clear in the documentation.
873 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
874 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
877 MH/01 Don't check that the operands of numeric comparison operators are
878 integers when their expansion is in "skipping" mode (fixes bug
879 introduced by 4.64-PH/07).
881 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
882 child addresses, Exim now panics and dies. Previously, because the count
883 is held in a short int, deliveries were likely to be lost. As such a
884 large number of recipients for a single message is ridiculous
885 (performance will be very, very poor), I have chosen to impose a limit
886 rather than extend the field.
892 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
893 leftover -K file (the existence of which was triggered by #402).
894 While we were at it, introduced process PID as part of the -K
895 filename. This should rule out race conditions when creating
898 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
899 processing considerably. Previous code took too long for large mails,
900 triggering a timeout which in turn triggers #401.
902 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
903 in the DK code in transports.c. sendfile() is not really portable,
904 hence the _LINUX specificness.
906 TF/01 In the add_headers option to the mail command in an Exim filter,
907 there was a bug that Exim would claim a syntax error in any
908 header after the first one which had an odd number of characters
911 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
912 callout verification, Exim cached a "reject" for the entire domain. This
913 is correct for most verifications, but it is not correct for a recipient
914 verification with use_sender or use_postmaster set, because in that case
915 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
916 case of MAIL FROM:<> rejection from other early rejections (e.g.
917 rejection of HELO). When verifying a recipient using a non-null MAIL
918 address, the cache is ignored if it shows MAIL FROM:<> rejection.
919 Whatever the result of the callout, the value of the domain cache is
920 left unchanged (for any other kind of callout, getting as far as trying
921 RCPT means that the domain itself is ok).
923 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
926 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
927 manifest itself as EPIPE rather than ECONNECT. When tidying away a
928 session, the daemon ignores ECONNECT errors and logs others; it now
929 ignores EPIPE as well.
931 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
932 (quoted-printable decoding).
934 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
935 later the small subsequent patch to fix an introduced bug.
937 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
939 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
941 PH/08 An error is now given if message_size_limit is specified negative.
943 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
944 to be given (somewhat) arbitrary names.
946 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
949 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
950 miscellaneous code fixes
952 PH/10 Added the log_reject_target ACL modifier to specify where to log
955 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
956 hostname. This is wrong, because it relates to the incoming message (and
957 probably the interface on which it is arriving) and not to the outgoing
958 callout (which could be using a different interface). This has been
959 changed to use the value of the helo_data option from the smtp transport
960 instead - this is what is used when a message is actually being sent. If
961 there is no remote transport (possible with a router that sets up host
962 addresses), $smtp_active_hostname is used.
964 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
965 tweaks were necessary in order to get it to work (see also 21 below):
966 (a) The code assumed that strncpy() returns a negative number on buffer
967 overflow, which isn't the case. Replaced with Exim's string_format()
969 (b) There were several signed/unsigned issues. I just did the minimum
970 hacking in of casts. There is scope for a larger refactoring.
971 (c) The code used strcasecmp() which is not a standard C function.
972 Replaced with Exim's strcmpic() function.
973 (d) The code set only $1; it now sets $auth1 as well.
974 (e) A simple test gave the error "authentication client didn't specify
975 service in request". It would seem that Dovecot has changed its
976 interface. Fortunately there's a specification; I followed it and
977 changed what the client sends and it appears to be working now.
979 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
982 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
983 address A is aliased to B and C, where B exists and C does not. Without
984 -v the output is "A verified" because verification stops after a
985 successful redirection if more than one address is generated. However,
986 with -v the child addresses are also verified. Exim was outputting "A
987 failed to verify" and then showing the successful verification for C,
988 with its parentage. It now outputs "B failed to verify", showing B's
989 parentage before showing the successful verification of C.
991 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
992 look up a TXT record in a specific list after matching in a combined
995 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
996 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
997 they consult the DNS. I had assumed they would set it the way they
998 wanted; and indeed my experiments on Linux seem to show that in some
999 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1000 To be on the safe side, however, I have now made the interface to
1001 host_find_byname() similar to host_find_bydns(), with an argument
1002 containing the DNS resolver options. The host_find_byname() function now
1003 sets these options at its start, just as host_find_bydns() does. The smtp
1004 transport options dns_qualify_single and dns_search_parents are passed to
1005 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1006 of host_find_byname() use the default settings of RES_DEFNAMES
1007 (qualify_single) but not RES_DNSRCH (search_parents).
1009 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1010 spool_read_header() do less string testing, by means of a preliminary
1011 switch on the second character of optional "-foo" lines. (This is
1012 overdue, caused by the large number of possibilities that now exist.
1013 Originally there were few.) While I was there, I also converted the
1014 str(n)cmp tests so they don't re-test the leading "-" and the first
1015 character, in the hope this might squeeze out yet more improvement.
1017 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1018 flag allowing group syntax was set by the header_syntax check but not
1019 turned off, possible causing trouble later; (2) The flag was not being
1020 set at all for the header_verify test, causing "group"-style headers to
1021 be rejected. I have now set it in this case, and also caused header_
1022 verify to ignore an empty address taken from a group. While doing this, I
1023 came across some other cases where the code for allowing group syntax
1024 while scanning a header line wasn't quite right (mostly, not resetting
1025 the flag correctly in the right place). These bugs could have caused
1026 trouble for malformed header lines. I hope it is now all correct.
1028 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1029 with the "reply" argument non-NULL. The code, however (which originally
1030 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1031 but it didn't always do it. This confused somebody who was copying the
1032 code for some other use. I have removed all the tests.
1034 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1035 feature that was used to support insecure browsers during the U.S. crypto
1036 embargo. It requires special client support, and Exim is probably the
1037 only MTA that supported it -- and would never use it because real RSA is
1038 always available. This code has been removed, because it had the bad
1039 effect of slowing Exim down by computing (never used) parameters for the
1040 RSA_EXPORT functionality.
1042 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1043 authenticator to fail if there's a tab character in the incoming data
1044 (there should never be unless someone is messing about, as it's supposed
1045 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1046 if the connection is using TLS or if the remote IP is the same as the
1047 local IP, and the "valid-client-cert option" if a client certificate has
1050 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1051 authenticators. This can be used for authorization after authentication
1052 succeeds. (In the case of plaintext, it servers for both authentication
1055 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1056 if any retry times were supplied.
1058 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1059 connection, where there is no client IP address to check. In this
1060 situation, the verify now always succeeds.
1062 PH/25 Applied John Jetmore's -Mset patch.
1064 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1066 PH/27 In a string expansion for a processed (not raw) header when multiple
1067 headers of the same name were present, leading whitespace was being
1068 removed from all of them, but trailing whitespace was being removed only
1069 from the last one. Now trailing whitespace is removed from each header
1070 before concatenation. Completely empty headers in a concatenation (as
1071 before) are ignored.
1073 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1074 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1076 PH/29 [Removed. This was a change that I later backed out, and forgot to
1077 correct the ChangeLog entry (that I had efficiently created) before
1078 committing the later change.]
1080 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1081 address errors (4xx response to RCPT) over the same connection as other
1082 messages routed to the same hosts. Such deliveries are always "forced",
1083 so retry times are not inspected. This resulted in far too many retries
1084 for the affected addresses. The effect occurred only when there were more
1085 hosts than the hosts_max_try setting in the smtp transport when it had
1086 the 4xx errors. Those hosts that it had tried were not added to the list
1087 of hosts for which the message was waiting, so if all were tried, there
1088 was no problem. Two fixes have been applied:
1090 (i) If there are any address or message errors in an SMTP delivery, none
1091 of the hosts (tried or untried) are now added to the list of hosts
1092 for which the message is waiting, so the message should not be a
1093 candidate for sending over the same connection that was used for a
1094 successful delivery of some other message. This seems entirely
1095 reasonable: after all the message is NOT "waiting for some host".
1096 This is so "obvious" that I'm not sure why it wasn't done
1097 previously. Hope I haven't missed anything, but it can't do any
1098 harm, as the worst effect is to miss an optimization.
1100 (ii) If, despite (i), such a delivery is accidentally attempted, the
1101 routing retry time is respected, so at least it doesn't keep
1102 hammering the server.
1104 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1105 in ${readsocket because some servers need this prod.
1107 PH/32 Added some extra debug output when updating a wait-xxx database.
1109 PH/33 The hint "could be header name not terminated by colon", which has been
1110 given for certain expansion errors for a long time, was not being given
1111 for the ${if def:h_colon_omitted{... case.
1113 PH/34 The spec says: "With one important exception, whenever a domain list is
1114 being scanned, $domain contains the subject domain." There was at least
1115 one case where this was not true.
1117 PH/35 The error "getsockname() failed: connection reset by peer" was being
1118 written to the panic log as well as the main log, but it isn't really
1119 panic-worthy as it just means the connection died rather early on. I have
1120 removed the panic log writing for the ECONNRESET error when getsockname()
1123 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1124 runs only) independently of the message's sender address. This meant
1125 that, if the 4xx error was in fact related to the sender, a different
1126 message to the same recipient with a different sender could confuse
1127 things. In particualar, this can happen when sending to a greylisting
1128 server, but other circumstances could also provoke similar problems.
1129 I have changed the default so that the retry time for these errors is now
1130 based a combination of the sender and recipient addresses. This change
1131 can be overridden by setting address_retry_include_sender=false in the
1134 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1135 remote server are returned as part of bounce messages. This was not
1136 happening for LMTP over a pipe (the lmtp transport), but now it is the
1137 same for both kinds of LMTP.
1139 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1140 in header lines that were in fact CNAMEs. This is no longer the case.
1142 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1143 and queue runs started by the daemon processed all messages. This has
1144 been fixed so that -R and -S can now usefully be given with -q<time>.
1146 PH/40 Import PCRE release 6.7 (fixes some bugs).
1148 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1150 PH/42 Give an error if -q is specified more than once.
1152 PH/43 Renamed the variables $interface_address and $interface_port as
1153 $received_ip_address and $received_port, to make it clear that these
1154 values apply to message reception, and not to the outgoing interface when
1155 a message is delivered. (The old names remain recognized, of course.)
1157 PH/44 There was no timeout on the connect() call when using a Unix domain
1158 socket in the ${readsocket expansion. There now is.
1160 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1161 be meaningful with "accept".
1163 SC/01 Eximstats V1.43
1164 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1166 SC/02 Eximstats V1.44
1167 Use a glob alias rather than an array ref in the generated
1168 parser. This improves both readability and performance.
1170 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1171 Collect SpamAssassin and rejection statistics.
1172 Don't display local sender or destination tables unless
1173 there is data to show.
1174 Added average volumes into the top table text output.
1176 SC/04 Eximstats V1.46
1177 Collect data on the number of addresses (recipients)
1178 as well as the number of messages.
1180 SC/05 Eximstats V1.47
1181 Added 'Message too big' to the list of mail rejection
1182 reasons (thanks to Marco Gaiarin).
1184 SC/06 Eximstats V1.48
1185 Mainlog lines which have GMT offsets and are too short to
1186 have a flag are now skipped.
1188 SC/07 Eximstats V1.49 (Alain Williams)
1189 Added the -emptyok flag.
1191 SC/08 Eximstats V1.50
1192 Fixes for obtaining the IP address from reject messages.
1194 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1195 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1196 whitesspace changes from 4.64-PH/27
1198 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1201 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1202 are found, allow negative numbers in numeric criteria)
1204 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1206 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1207 to match changes made in 4.64-PH/43
1209 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1211 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1212 "domain" is actually an IP address, and force a failure. This locks out
1213 those revolvers/nameservers that support "A-for-A" lookups, in
1214 contravention of the specifications.
1216 PH/48 When a host name was looked up from an IP address, and the subsequent
1217 forward lookup of the name timed out, the host name was left in
1218 $sender_host_name, contrary to the specification.
1220 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1221 restricted to single-key lookups, Exim was not diagnosing an error if
1222 * or *@ was used with a query-style lookup.
1224 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1226 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1227 long ago, but noone interested enough thought of it. Let's just say that
1228 the "1.1" means that there are some new functions that weren't there at
1229 some point in the past.
1231 PH/51 Error processing for expansion failure of helo_data from an smtp
1232 transport during callout processing was broken.
1234 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1235 tested/used via the -bh/-bhc/-bs options.
1237 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1238 bug, fixed in subsequent PCRE releases).
1240 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1241 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1243 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1249 SC/01 Use a glob alias rather than an array ref in eximstats generated
1250 parser. This improves both readability and performance.
1252 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1253 Don't display local sender or destination tables in eximstats unless
1254 there is data to show.
1255 Added average volumes into the eximstats top table text output.
1257 SC/03 Collect data on the number of addresses (recipients) as well
1258 as the number of messages in eximstats.
1260 TF/01 Correct an error in the documentation for the redirect router. Exim
1261 does (usually) call initgroups() when daemonizing.
1263 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1264 with consistent privilege compared to when running as a daemon.
1266 TF/03 Note in the spec that $authenticated_id is not set for local
1267 submissions from trusted users.
1269 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1270 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1272 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1273 by adding some example configuration directives to the default
1274 configuration file. A little bit of work is required to uncomment the
1275 directives and define how usernames and passwords are checked, but
1276 there is now a framework to start from.
1278 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1279 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1280 without this. I don't know how relevant this is to other LDAP libraries.
1282 PH/02 Add the verb name to the "unknown ACL verb" error.
1284 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1286 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1288 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1289 directory not expanded when it should be if an expanded home directory
1290 was set for the address (which is overridden by the transport).
1292 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1295 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1296 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1297 because it is too late at that time, and has no effect.
1299 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1300 security issue with \' (bugzilla #107). I could not use the
1301 PQescapeStringConn() function, because it needs a PGconn value as one of
1304 PH/08 When testing addresses using -bt, indicate those final addresses that
1305 are duplicates that would not cause an additional delivery. At least one
1306 person was confused, thinking that -bt output corresponded to deliveries.
1307 (Suppressing duplicates isn't a good idea as you lose the information
1308 about possibly different redirections that led to the duplicates.)
1310 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1311 systems where poll() doesn't work, in particular OS X.
1313 PH/10 Added more information to debugging output for retry time not reached.
1315 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1316 operations in malware.c.
1318 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1321 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1322 syslog_duplication set false, log lines that would normally be written
1323 both the the main log and to the reject log were not written to syslog at
1326 PH/14 In the default configuration, change the use of "message" in ACL warn
1327 statements to "add_header".
1329 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1330 not followed by a command (e.g. "seen endif").
1332 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1333 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1336 PH/17 Added extra conditions to the default value of delay_warning_condition
1340 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1341 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1342 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1345 The Auto-Submitted: and various List- headers are standardised, whereas I
1346 don't think Precedence: ever was.
1348 PH/18 Refactored debugging code in route_finduser() to show more information,
1349 in particular, the error code if getpwnam() issues one.
1351 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1352 This is apparently needed in addition to the PH/07 change above to avoid
1353 any possible encoding problems.
1355 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1356 but not after initializing Perl.
1358 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1359 output them only if debugging. By default they are written stderr,
1360 apparently, which is not desirable.
1362 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1365 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1368 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1370 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1371 authenticated or an ident call has been made. Suppress the default
1372 values for $authenticated_id and $authenticated_sender (but permit -oMai
1373 and -oMas) when testing with -bh.
1375 PH/24 Re-jigged the order of the tests in the default configuration so that the
1376 tests for valid domains and recipients precede the DNS black list and CSA
1377 tests, on the grounds that those ones are more expensive.
1379 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1380 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1381 This bug exists in every version of Exim that I still have, right back to
1384 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1385 However, an attempt to turn on case-sensitivity in a regex key by
1386 including (?-i) didn't work because the subject string was already
1387 lowercased, and the effects were non-intuitive. It turns out that a
1388 one-line patch can be used to allow (?-i) to work as expected.
1394 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1395 other effects) broke the use of negated acl sub-conditions.
1397 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1400 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1401 "Deny" causes Exim to reject the incoming connection with a 554 error.
1402 Unfortunately, if there is a major crisis, such as a disk failure,
1403 tcp-wrappers gives "deny", whereas what one would like would be some
1404 kind of temporary error. A kludge has been added to help with this.
1405 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1406 554 error is used if errno is still zero or contains ENOENT (which occurs
1407 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1410 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1412 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1413 errors. Otherwise a message that provokes a temporary error (when other
1414 messages do not) can cause a whole host to time out.
1416 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1417 addresses were routed directly to files or pipes from a redirect router.
1418 File deliveries just didn't batch; pipe deliveries might have suffered
1421 PH/06 A failure to get a lock for a hints database would erroneously always say
1422 "Failed to get write lock", even when it was really a read lock.
1424 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1425 of 0600. This has been changed to use the value of the lockfile_mode
1426 option (which defaults to 0600).
1428 PH/08 Applied small patch from the Sieve maintainer.
1430 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1431 folder from quota calculations, a direct delivery into this folder messed
1432 up the contents of the maildirsize file. This was because the regex was
1433 used only to exclude .Trash (or whatever) when the size of the mailbox
1434 was calculated. There was no check that a delivery was happening into an
1435 excluded directory. This bug has been fixed by ignoring all quota
1436 processing for deliveries into excluded directories.
1438 PH/10 Added the maildirfolder_create_regex option to appendfile.
1444 PH/01 The code for finding all the local interface addresses on a FreeBSD
1445 system running IPv6 was broken. This may well have applied to all BSD
1446 systems, as well as to others that have similar system calls. The broken
1447 code found IPv4 interfaces correctly, but gave incorrect values for the
1448 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1449 that it would not match correctly against @[] and not recognize the IPv6
1452 PH/02 The ipliteral router was not recognizing addresses of the form user@
1453 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1455 PH/03 Added disable_ipv6.
1457 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1458 decoded form, because it is most often used to construct To: headers
1459 lines in autoreplies, and the decoded form may well be syntactically
1460 invalid. However, $reply_address has leading white space removed, and all
1461 newlines turned into spaces so that the autoreply transport does not
1464 PH/05 If group was specified without a user on a router, and no group or user
1465 was specified on a transport, the group from the router was ignored.
1467 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1468 for visible compile-time settings that can be used to change these
1469 numbers, for those that want even more. Backwards compatibility with old
1470 spool files has been maintained. However, going back to a previous Exim
1471 release will lost any variables that are in spool files.
1473 PH/07 Two small changes when running in the test harness: increase delay when
1474 passing a TCP/IP connection to a new process, in case the original
1475 process has to generate a bounce, and remove special handling of
1476 127.0.0.2 (sic), which is no longer necessary.
1478 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1479 be the same on different OS.
1481 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1484 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1485 whether --show-vars was specified or not
1487 JJ/02 exipick: Added support for new ACL variable spool format introduced
1490 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1491 syntactically invalid From: or Reply-to: line, and a filter used this to
1492 generate an autoreply, and therefore failed to obtain an address for the
1493 autoreply, Exim could try to deliver to a non-existent relative file
1494 name, causing unrelated and misleading errors. What now happens is that
1495 it logs this as a hard delivery error, but does not attempt to create a
1498 PH/11 The exinext utility has a -C option for testing purposes, but although
1499 the given file was scanned by exinext itself; it wasn't being passed on
1500 when Exim was called.
1502 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1503 an end-of-file indication when reading a command response.
1505 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1506 compiled. In many other places in Exim, IPv6 addresses are always
1507 recognized, so I have changed this. It also means that IPv4 domain
1508 literals of the form [IPV4:n.n.n.n] are now always recognized.
1510 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1511 used if the router is not running as root, for example, when verifying at
1512 ACL time, or when using -bh. The debugging output from this situation was
1513 non-existent - all you got was a failure to exec. I have made two
1516 (a) Failures to set uid/gid, the current directory, or a process leader
1517 in a subprocess such as that created by queryprogram now generate
1518 suitable debugging ouput when -d is set.
1520 (b) The queryprogram router detects when it is not running as root,
1521 outputs suitable debugging information if -d is set, and then runs
1522 the subprocess without attempting to change uid/gid.
1524 PH/15 Minor change to Makefile for building test_host (undocumented testing
1527 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1528 additional section of a DNS packet that returns MX or SRV records.
1529 Instead, it always explicitly searches for A/AAAA records. This avoids
1530 major problems that occur when a DNS server includes only records of one
1531 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1532 fixed another bug: if SRV records were looked up and the corresponding
1533 address records were *not* found in the additional section, the port
1534 values from the SRV records were lost.
1536 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1537 using the correct key (the original address) when searching the retry
1538 rules in order to find which one to use for generating the retry hint.
1540 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1541 adding the default one. Similarly, if it contains a Reply-To: header, the
1542 errors_reply_to option, if set, is not used.
1544 PH/19 When calculating a retry time, Exim used to measure the "time since
1545 failure" by looking at the "first failed" field in the retry record. Now
1546 it does not use this if it is later than than the arrival time of the
1547 message. Instead it uses the arrival time. This makes for better
1548 behaviour in cases where some deliveries succeed, thus re-setting the
1549 "first failed" field. An example is a quota failure for a huge message
1550 when small messages continue to be delivered. Without this change, the
1551 "time since failure" will always be short, possible causing more frequent
1552 delivery attempts for the huge message than are intended.
1553 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1555 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1556 $1, $2, $3) because the numerical variables can be reset during some
1557 expansion items (e.g. "match"), thereby losing the authentication data.
1559 PH/21 Make -bV show the size of off_t variables so that the test suite can
1560 decide whether to run tests for quotas > 2G.
1562 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1563 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1564 filecount value is greater than 2G or if a quota value is greater than 2G
1565 on a system where the size of off_t is not greater than 4, a panic error
1568 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1569 never match. The debug and -bh output now contains an explicit error
1570 message indicating a malformed IPv4 address or mask.
1572 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1573 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1574 PH/23 above applies.
1576 PH/25 Do not write to syslog when running in the test harness. The only
1577 occasion when this arises is a failure to open the main or panic logs
1578 (for which there is an explicit test).
1580 PH/26 Added the /no_tell option to "control=freeze".
1582 PH/27 If a host name lookup failed very early in a connection, for example, if
1583 the IP address matched host_lookup and the reverse lookup yielded a name
1584 that did not have a forward lookup, an error message of the form "no IP
1585 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1586 could be logged. Now it outputs the IP address instead of "NULL".
1588 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1589 allows the sender and the authenticated sender to be set when
1590 submitting a message from within Exim. Since child_open_exim() is
1591 documented for local_scan(), the new function should be too.
1593 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1594 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1595 results in an empty string is now treated as unset.
1597 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1599 PH/31 Added sender_verify_fail logging option.
1601 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1602 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1603 tidied the source and removed it altogether.
1605 PH/33 When a queue run was abandoned because the load average was too high, a
1606 log line was always written; now it is written only if the queue_run log
1607 selector is set. In addition, the log line for abandonment now contains
1608 information about the queue run such as the pid. This is always present
1609 in "start" and "stop" lines but was omitted from the "abandon" line.
1611 PH/34 Omit spaces between a header name and the colon in the error message that
1612 is given when verify = headers_syntax fails (if there are lots of them,
1613 the message gets confusing).
1615 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1616 names, as there are now some PTR records that contain slashes. This check
1617 is only to protect against broken name servers that fall over on strange
1618 characters, so the fact that it applies to all lookups doesn't matter.
1620 PH/36 Now that the new test suite is complete, we can remove some of the
1621 special code in Exim that was needed for the old test suite. For example,
1622 sorting DNS records because real resolvers return them in an arbitrary
1623 order. The new test suite's fake resolver always returns records in the
1626 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1627 bounces) except when queue_only is set, to avoid logging races between
1628 the different processes.
1630 PH/38 Panic-die if .include specifies a non-absolute path.
1632 PH/39 A tweak to the "H" retry rule from its user.
1634 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1635 a label. They prevented compilation on older perls.
1637 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1638 a warning to be raised on newish perls.
1640 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1641 on queue. Changes to match documented behaviour of showing count of
1642 messages matching specified criteria.
1644 PH/40 Changed the default ident timeout from 30s to 5s.
1646 PH/41 Added support for the use of login_cap features, on those BSD systems
1647 that have them, for controlling the resources used by pipe deliveries.
1649 PH/42 The content-scanning code uses fopen() to create files in which to put
1650 message data. Previously it was not paying any attention to the mode of
1651 the files. Exim runs with umask(0) because the rest of the code creates
1652 files with open(), and sets the required mode explicitly. Thus, these
1653 files were ending up world-writeable. This was not a big issue, because,
1654 being within the spool directory, they were not world-accessible. I have
1655 created a function called modefopen, which takes an additional mode
1656 argument. It sets umask(777), creates the file, chmods it to the required
1657 mode, then resets the umask. All the relevant calls to fopen() in the
1658 content scanning code have been changed to use this function.
1660 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1661 to 24 hours. This avoids potential overflow problems when processing G
1662 and H retry rules. I suspect nobody ever tinkers with this value.
1664 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1666 PH/45 When the plaintext authenticator is running as a client, the server's
1667 challenges are checked to ensure they are valid base64 strings. By
1668 default, the authentication attempt is cancelled if an invalid string is
1669 received. Setting client_ignore_invalid_base64 true ignores these errors.
1670 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1671 they are received. Thus, the responses can be made to depend on the
1672 challenges. If an invalid string is ignored, an empty string is placed in
1675 PH/46 Messages that are created by the autoreply transport now contains a
1676 References: header, in accordance with RFCs 2822 and 3834.
1678 PH/47 Added authenticated_sender_force to the smtp transport.
1680 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1682 PH/49 Installed latest patch from the Sieve maintainer.
1684 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1685 was also set, the appendfile transport was unnecessarily scanning a
1686 directory of message files (e.g. for maildir delivery) to find the count
1687 of files (along with the size), even though it did not need this
1688 information. It now does the scan only if it needs to find either the
1689 size of the count of files.
1691 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1693 PH/52 Two bugs concerned with error handling when the smtp transport is
1696 (i) Exim was not creating retry information for temporary errors given
1697 for individual recipients after the DATA command when the smtp transport
1698 was used in LMTP mode. This meant that they could be retried too
1699 frequently, and not timed out correctly.
1701 (ii) Exim was setting the flag that allows error details to be returned
1702 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1703 recipients that were returned after the DATA command.
1705 PH/53 This is related to PH/52, but is more general: for any failing address,
1706 when detailed error information was permitted to be returned to the
1707 sender, but the error was temporary, then after the final timeout, only
1708 "retry timeout exceeded" was returned. Now it returns the full error as
1709 well as "retry timeout exceeded".
1711 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1712 do this, and (what is worse) MTAs that accept it.
1714 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1715 will now be deprecated.
1717 PH/56 New os.c-cygwin from the Cygwin maintainer.
1719 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1720 formats (previously only available in exim formats via -bpr, -bpru,
1721 and -bpra. Now also available in native and exiqgrep formats)
1723 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1724 with very large, slow to parse queues
1726 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1728 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1730 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1731 responses to authentication challenges, though it was showing the
1732 challenges; (ii) I've removed the CR characters from the debug output for
1735 PH/58 Allow for the insertion of a newline as well as a space when a string
1736 is turned into more than one encoded-word during RFC 2047 encoding. The
1737 Sieve code now uses this.
1739 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1740 data_4xx, lost_connection, tls_required.
1742 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1743 message was being sent as an SMTP response.
1745 PH/61 Add -l and -k options to exicyclog.
1747 PH/62 When verifying, if an address was redirected to one new address, so that
1748 verification continued, and the new address failed or deferred after
1749 having set something in $address_data, the value of $address_data was not
1750 passed back to the ACL. This was different to the case when no
1751 redirection occurred. The value is now passed back in both cases.
1753 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1754 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1755 use login_cap.h, so on its own it isn't the distinguishing feature. The
1756 new name refers directly to the setclassresources() function.
1758 PH/65 Added configuration files for NetBSD3.
1760 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1762 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1763 is preferred over IPv4.
1765 PH/68 The bounce_return_message and bounce_return_body options were not being
1766 honoured for bounces generated during the reception of non-SMTP messages.
1767 In particular, this applied to messages rejected by the ACL. This bug has
1768 been fixed. However, if bounce_return_message is true and bounce_return_
1769 body is false, the headers that are returned for a non-SMTP message
1770 include only those that have been read before the error was detected.
1771 (In the case of an ACL rejection, they have all been read.)
1773 PH/69 The HTML version of the specification is now built in a directory called
1774 spec_html instead of spec.html, because the latter looks like a path with
1775 a MIME-type, and this confuses some software.
1777 PH/70 Catch two compiler warnings in sieve.c.
1779 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1780 function verify_get_ident() calls ip_connect() to connect a socket, but
1781 if the "connect()" function timed out, ip_connect() used to close the
1782 socket. However, verify_get_ident() also closes the socket later, and in
1783 between Exim writes to the log, which may get opened at this point. When
1784 the socket was closed in ip_connect(), the log could get the same file
1785 descriptor number as the socket. This naturally causes chaos. The fix is
1786 not to close the socket in ip_connect(); the socket should be closed by
1787 the function that creates it. There was only one place in the code where
1788 this was missing, in the iplookup router, which I don't think anybody now
1789 uses, but I've fixed it anyway.
1791 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1792 well as to direct DNS lookups. Otherwise the handling of names in host
1793 lists is inconsistent and therefore confusing.
1799 PH/01 Two changes to the default runtime configuration:
1801 (1) Move the checks for relay_from_hosts and authenticated clients from
1802 after to before the (commented out) DNS black list checks.
1804 (2) Add control=submission to the relay_from_hosts and authenticated
1805 clients checks, on the grounds that messages accepted by these
1806 statements are most likely to be submissions.
1808 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1810 (1) Generate an error if the third argument for the ${prvs expansion is
1813 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1816 (3) Reset the variables that are obtained from the first argument of
1817 ${prvscheck and used in the second argument before leaving the code,
1818 because their memory is reclaimed, so using them afterwards may do
1821 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1822 one (it's much easier than Tom thought :-).
1824 (5) Because of (4), we can now allow for the use of $prvscheck_result
1825 inside the third argument.
1827 PH/03 For some reason, the default setting of PATH when running a command from
1828 a pipe transport was just "/usr/bin". I have changed it to
1831 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1832 anything to be listed in the output from -bV.
1834 PH/05 When a filter generated an autoreply, the entire To: header line was
1835 quoted in the delivery log line, like this:
1837 => >A.N.Other <ano@some.domain> <original@ddress> ...
1839 This has been changed so that it extracts the operative address. There
1840 may be more than one such address. If so, they are comma-separated, like
1843 => >ano@some.domain,ona@other.domain <original@ddress> ...
1845 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1846 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1847 not being looked up in the rDNS to get a host name, Exim was showing the
1848 IP address twice in Received: lines, even though the IP addresses were
1849 identical. For example:
1851 Received: from [1.2.3.4] (helo=[1.2.3.4])
1853 However, if the real host name was known, it was omitting the HELO data
1854 if it matched the actual IP address. This has been tidied up so that it
1855 doesn't show the same IP address twice.
1857 PH/07 When both +timestamp and +memory debugging was on, the value given by
1858 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1859 called by the debug printing, thereby overwriting the timestamp buffer.
1860 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1862 PH/08 When the original message was included in an autoreply transport, it
1863 always said "this is a copy of the message, including all the headers",
1864 even if body_only or headers_only was set. It now gives an appropriate
1867 PH/09 Applied a patch from the Sieve maintainer which:
1869 o fixes some comments
1870 o adds the (disabled) notify extension core
1871 o adds some debug output for the result of if/elsif tests
1872 o points to the current vacation draft in the documentation
1873 and documents the missing references header update
1877 o fixes a bug in processing the envelope test (when testing
1878 multiple envelope elements, the last element determinted the
1881 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1882 Electronic Mail") by including:
1884 Auto-submitted: auto-generated
1886 in the messages that it generates (bounce messages and others, such as
1887 warnings). In the case of bounce messages for non-SMTP mesages, there was
1888 also a typo: it was using "Auto_submitted" (underscore instead of
1889 hyphen). Since every message generated by Exim is necessarily in response
1890 to another message, thes have all been changed to:
1892 Auto-Submitted: auto-replied
1894 in accordance with these statements in the RFC:
1896 The auto-replied keyword:
1898 - SHOULD be used on messages sent in direct response to another
1899 message by an automatic process,
1901 - MUST NOT be used on manually-generated messages,
1903 - MAY be used on Delivery Status Notifications (DSNs) and Message
1904 Disposition Notifications (MDNs),
1906 - MUST NOT be used on messages generated by automatic or periodic
1907 processes, except for messages which are automatic responses to
1910 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1911 to the default Received: header definition.
1913 PH/12 Added log selector acl_warn_skipped (default on).
1915 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1916 variables because (a) they are in the wrong storage pool and (b) even if
1917 they were copied, it wouldn't work properly because of the caching.
1919 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1920 checking when decoding. Apparently there are clients that generate
1921 overlong encoded strings. Why am I not surprised?
1923 PH/15 If the first argument of "${if match_address" was not empty, but did not
1924 contain an "@" character, Exim crashed. Now it writes a panic log message
1925 and treats the condition as false.
1927 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1929 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1930 extension "envelope-auth". The code is finished and in agreement with
1931 other implementations, but there is no documentation so far and in fact,
1932 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1933 not changing the active code.
1935 Print executed "if" and "elsif" statements when debugging is used. This
1936 helps a great deal to understand what a filter does.
1938 Document more things not specified clearly in RFC3028. I had all this
1939 sorted out, when out of a sudden new issues came to my mind. Oops."
1941 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1944 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1945 canonical form (as documented). However, after a host name lookup from
1946 the IP address, check_host() was doing a simple string comparison with
1947 addresses acquired from the DNS when checking that the found name did
1948 have the original IP as one of its addresses. Since any found IPv6
1949 addresses are likely to be in abbreviated form, the comparison could
1950 fail. Luckily, there already exists a function for doing the comparison
1951 by converting both addresses to binary, so now that is used instead of
1952 the text comparison.
1954 PH/20 There was another similar case to PH/19, when a complete host name was
1955 given in a host list; looking up its IP address could give an abbreviated
1956 form, whereas the current host's name might or might not be abbreviated.
1957 The same fix has been applied.
1963 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1964 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1967 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1968 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1970 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1972 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1973 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1974 Also, for "Auto-Submitted", treat anything other than "no" as
1975 non-personal, in accordance with RFC 3834. (Previously it treated
1976 anything starting "auto-" as non-personal.)
1978 TF/01 The control=submission/name=... option had a problem with syntax
1979 errors if the name included a slash character. The /name= option
1980 now slurps the rest of the string, so it can include any characters
1981 but it must come last in the list of options (after /sender_retain
1984 PH/05 Some modifications to the interface to the fake nameserver for the new
1992 TK/01 Added the "success_on_redirect" address verification option. See
1993 NewStuff for rationale and an example.
1995 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1997 PH/02 Patch to exigrep to allow it to work on syslog lines.
1999 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2000 fread() to skip over the body file's header line, because in Cygwin the
2001 header line is locked and is inaccessible.
2003 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2004 co-exist for some time) to make it clear that it is the Exim ID that is
2005 referenced, not the Message-ID: header line.
2007 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2008 string_format() function, because snprintf() does not exist on all
2011 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2012 ${stat: expansion item.
2014 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2015 protocol synchronization error", to keep the pedants happy.
2017 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2018 well as for IRIX systems, when gcc is being used. See the host.c source
2021 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2023 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2026 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2027 transport and to the smtp transport in LMTP mode.
2029 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2031 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2032 run a filter in a subprocess. This could lead to confusion in subsequent
2033 lookups in the parent process. There should also be a search_tidyup() at
2034 the end of the subprocess.
2036 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2037 only if the host matched helo_try_verify_hosts, which caused the
2038 verification to occur when the EHLO/HELO command was issued. The ACL just
2039 tested the remembered result. Now, if a previous verification attempt has
2040 not happened, "verify = helo" does it there and then.
2042 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2044 TK/03 Fix log output including CR from clamd.
2046 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2047 exist provoked a memory error which could cause a segfault.
2049 PH/15 Installed PCRE 6.2
2051 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2053 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2054 of the problem. Specifically, suggested +O2 rather than +O1 for the
2057 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2059 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2060 record, the port was not correctly logged when the outgoing_port log
2061 selector was set (it logged the transort's default port).
2063 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2064 fallback_hosts, and "hosts" in the smtp transport.
2066 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2067 host errors such as "Connection refused".
2069 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2070 authentication with radiusclient 0.4.9:
2072 - Error returned from rc_read_config was caught wrongly
2073 - Username/password not passed on to radius server due to wrong length.
2075 The presumption is that some radiusclient API changes for 4.51/PH/17
2076 were not taken care of correctly. The code is still untested by me (my
2077 Linux distribution still has 0.3.2 of radiusclient), but it was
2078 contributed by a Radius user.
2080 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2081 expanding the "port" option of the smtp transport.
2083 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2084 while reading a MIME header. Thanks to Tom Hughes for a patch.
2086 PH/24 Include config.h inside local_scan.h so that configuration settings are
2089 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2090 that in an ACL for RCPT (for example), you can examine exactly what was
2093 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2094 commands, but it was not correctly comparing the address with the actual
2095 client host address. Thus, it would show the EHLO address in Received:
2096 header lines when this was not necessary.
2098 PH/27 Added the % operator to ${eval:}.
2100 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2101 it should be ignoring failures (because with -C, for example, it has lost
2102 privilege). It wasn't ignoring creation failures other than "already
2105 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2108 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2109 because an input line was too long, either on its own, or by virtue of
2110 too many continuations, the temporary file was not being removed, and the
2111 return code was incorrect.
2113 PH/31 Missing "BOOL" in function definition in filtertest.c.
2115 PH/32 Applied Sieve patches from the maintainer.
2117 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2119 PH/33 Added "verify = not_blind".
2121 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2122 Local/Makefile (with some defaults set). These are used in built scripts
2123 such as exicyclog, but they have never been used in the exim_install
2124 script (though there are many overriding facilities there). I have
2125 arranged that the exim_install script now takes note of these two
2128 PH/35 Installed configuration files for Dragonfly.
2130 PH/36 When a locally submitted message by a trusted user did not contain a
2131 From: header, and the sender address was obtained from -f or from an SMTP
2132 MAIL command, and the trusted user did not use -F to supply a sender
2133 name, $originator_name was incorrectly used when constructing a From:
2134 header. Furthermore, $originator_name was used for submission mode
2135 messages from external hosts without From: headers in a similar way,
2136 which is clearly wrong.
2138 PH/37 Added control=suppress_local_fixups.
2140 PH/38 When log_selector = +received_sender was set, and the addition of the
2141 sender made the log line's construction buffer exactly full, or one byte
2142 less than full, an overflow happened when the terminating "\n" was
2145 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2146 when the result of a list match is failure because a DNS lookup failed.
2148 PH/40 RM_COMMAND is now used in the building process.
2150 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2151 the "build-* directories that it finds.
2153 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2154 address in a domain literal was a prefix of an interface address.
2156 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2157 when verifying a sender address, unless rewrite_headers is false.
2159 PH/44 Wrote a long comment about why errors_to addresses are verified as
2160 recipients, not senders.
2162 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2163 the ratelimit ACL was added.
2165 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2167 PH/46 Added extra information about PostgreSQL errors to the error string.
2169 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2170 avoiding the need to install special zones in a real server. This is
2171 backwards compatible; if it can't find the fake resolver, it drops back.
2172 Thus, both old and new test suites can be run.
2174 TF/02 Added util/ratelimit.pl
2176 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2177 clock is set back in time.
2179 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2180 Candler <B.Candler@pobox.com>.
2182 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2183 OK for addresses that are the result of redirections.
2185 PH/48 A number of further additions for the benefit of the new test suite,
2186 including a fake gethostbyname() that interfaces to the fake DNS resolver
2189 TF/06 The fix for widen_domains has also been applied to qualify_single and
2190 search_parents which are the other dnslookup options that can cause
2193 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2196 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2198 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2199 service" if it encountered an MX record with an empty target hostname.
2200 The message is now "an MX or SRV record indicated no SMTP service".
2202 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2203 if the DNS of the sending site is misconfigured. This is quite a
2204 common situation. This change restores the behaviour of treating a
2205 helo verification defer as a failure.
2207 PH/51 If self=fail was set on a router, the bounce message did not include the
2208 actual error message.
2214 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2216 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2217 command itself ended in error, the underlying message about the transport
2218 filter timeout was being overwritten with the pipe command error. Now the
2219 underlying error message should be appended to the second error message.
2221 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2223 PH/02 Reduce the amount of output that "make" produces by default. Full output
2224 can still be requested.
2226 PH/03 The warning log line about a condition test deferring for a "warn" verb
2227 was being output only once per connection, rather than after each
2228 occurrence (because it was using the same function as for successful
2229 "warn" verbs). This seems wrong, so I have changed it.
2231 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2232 it should not have, which might have caused a crash in the right
2233 circumstances, but probably never did.
2235 PH/04 Installed a modified version of Tony Finch's patch to make submission
2236 mode fix the return path as well as the Sender: header line, and to
2237 add a /name= option so that you can make the user's friendly name appear
2240 TF/03 Added the control = fakedefer ACL modifier.
2242 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2243 Mark Lowes for thorough testing.
2245 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2247 TK/03 Merged latest SRS patch from Miles Wilton.
2249 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2250 with the definition in sysexits.h (which is #included earlier).
2251 Fortunately, Exim does not actually use EX_OK. The code used to try to
2252 preserve the sysexits.h value, by assumimg that macro definitions were
2253 scanned for macro replacements. I have been disabused of this notion,
2254 so now the code just undefines EX_OK before #including unistd.h.
2256 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2257 in the smtp transport. When a block could not be written in a single
2258 write() function, the timeout was being re-applied to each part-write.
2259 This seems wrong - if the receiver was accepting one byte at a time it
2260 would take for ever. The timeout is now adjusted when this happens. It
2261 doesn't have to be particularly precise.
2263 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2264 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2266 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2267 without a domain if the check to <postmaster@domain> fails.
2269 SC/01 Eximstats: added -xls and the ability to specify output files
2270 (patch written by Frank Heydlauf).
2272 SC/02 Eximstats: use FileHandles for outputing results.
2274 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2276 SC/04 Eximstats: fixed display of large numbers with -nvr option
2278 SC/05 Eximstats: fixed merging of reports with empty tables.
2280 SC/06 Eximstats: added the -include_original_destination flag
2282 SC/07 Eximstats: removed tabs and trailing whitespace.
2284 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2286 TK/06 MBOX spool code: Add real "From " MBOX separator line
2287 so the .eml file is really in mbox format (even though
2288 most programs do not really care). Patch from Alex Miller.
2290 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2291 The latter is generated from $received_to and is only set if the
2292 message has one envelope recipient. SA can use these headers,
2293 obviously out-of-the-box. Patch from Alex Miller.
2295 PH/08 The ${def test on a variable was returning false if the variable's
2296 value was "0", contrary to what the specification has always said!
2297 The result should be true unless the variable is empty.
2299 PH/09 The syntax error of a character other than { following "${if
2300 def:variable_name" (after optional whitespace) was not being diagnosed.
2301 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2302 accidental colon was present, for example, could give incorrect results.
2304 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2305 result is used (not including appendfile, where other changes are about
2308 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2309 This involved changing a lot of size variables from int to off_t. It
2310 should work with maildirs and everything.
2312 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2313 spamd dying while we are connected to it.
2315 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2318 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2319 function for BDB 4.3.
2321 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2323 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2324 the sources for PCRE have been re-arranged and more files are now
2327 PH/15 The code I had for printing potentially long long variables in PH/11
2328 above was not the best (it lost precision). The length of off_t variables
2329 is now inspected at build time, and an appropriate printing format (%ld
2330 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2331 to be "long long int" or "long int". This is needed for the internal
2332 formatting function string_vformat().
2334 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2335 the configuration file to be ":syslog", then the script "guesses" where
2336 the logs files are, rather than using the compiled in default. In our
2337 case the guess is not the same as the compiled default, so the script
2338 suddenly stopped working when I started to use syslog. The patch checks
2339 to see if log_file_path is "". If so, it attempts to read it from exim
2340 with no configuration file to get the compiled in version, before it
2341 falls back to the previous guessing code."
2343 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2344 implementing BATV in an Exim configuration. See NewStuff for the gory
2347 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2348 Makefile that are specific to HP-UX.
2350 PH/18 If the "use_postmaster" option was set for a recipient callout together
2351 with the "random" option, the postmaster address was used as the MAIL
2352 FROM address for the random test, but not for the subsequent recipient
2353 test. It is now used for both.
2355 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2356 patch removes a few documentation additions to RFC 3028, because the
2357 latest draft now contains them. It adds the new en;ascii-case comparator
2358 and a new error check for 8bit text in MIME parts. Comparator and
2359 require names are now matched exactly. I enabled the subaddress
2360 extension, but it is not well tested yet (read: it works for me)."
2362 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2363 rework some of the code of TK/09 above to avoid the hardwired use of
2364 "%lld" and "long long". Replaced the call to snprintf() with a call to
2367 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2368 records point to non-existent hosts", "retry timeout exceeded", and
2369 "retry time not reached for any host after a long failure period".
2371 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2372 experimental DomainKeys support:
2374 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2375 (2) On an error such as an illegally used "control", the wrong name for
2376 the control was given.
2378 These problems did NOT occur unless DomainKeys support was compiled.
2380 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2382 PH/24 Added ${if match_ip condition.
2384 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2385 databases so that it will be absolutely obvious if a crash occurs in the
2386 DB library. This is a regular occurrence (often caused by mis-matched
2389 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2390 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2391 picked up on a user's system that detects such things. There doesn't seem
2392 to be a gcc warning option for this - only an attribute that has to be
2393 put on the function's prototype. It seems that in Fedora Core 4 they have
2394 set this on a number of new functions. No doubt there will be more in due
2397 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2398 specify a transport. However, if an address that was verified by such a
2399 router was the subject of a callout, Exim crashed because it tried to
2400 read the rcpt_include_affixes from the non-existent transport. Now it
2401 just assumes that the setting of that option is false. This bug was
2402 introduced by 4.51/PH/31.
2404 PH/28 Changed -d+all to exclude +memory, because that information is very
2405 rarely of interest, but it makes the output a lot bigger. People tend to
2406 do -d+all out of habit.
2408 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2409 code in os-type was giving problems when libc.so lives in lib64, like on
2412 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2413 aren't the modern standard, and it seems that some systems' include files
2414 don't always have them. Exim was already checking for some of the newer
2415 ones like T_AAAA, and defining it itself. I've added checks for all the
2416 record types that Exim uses.
2418 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2419 not automatically generating a new one, as it is supposed to. This
2420 prevented TLS from working. If the file did exist, but contained invalid
2421 data, a new version was generated, as expected. It was only the case of a
2422 non-existent file that was broken.
2424 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2425 with a change in libdomainkeys > 0.64.
2427 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2428 from DNS. If the selector record carries the flag, it now has
2429 precedence over the domain-wide flag.
2431 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2433 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2434 the use of a port name that isn't defined in /etc/services) occurred, the
2435 message was deferred as in a normal delivery, and thus remained on the
2436 spool, instead of being failed because of the mua_wrapper setting. This
2437 is now fixed, and I tidied up some of the mua_wrapper messages at the
2440 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2441 the messages in a hash of arrays rather than using individual hashes.
2442 This is a bit cleaner and results in dramatic memory savings, albeit
2443 at a slight CPU cost.
2445 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2446 as requested by Marc Sherman.
2448 SC/10 Eximstats: added histograms for user specified patterns as requested
2451 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2453 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2454 fopen() in the content-scanning modules that did not already have it.
2460 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2461 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2463 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2465 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2467 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2468 to test Sieve filters that use "vacation".
2470 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2471 that changes the way the GnuTLS parameters are stored in the cache file.
2472 The new format can be generated externally. For backward compatibility,
2473 if the data in the cache doesn't make sense, Exim assumes it has read an
2474 old-format file, and it generates new data and writes a new file. This
2475 means that you can't go back to an older release without removing the
2478 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2479 work if there are any delivery delays because "one_time" forces the
2480 parent to be marked "delivered", so its unseen clone is never tried
2481 again. For this reason, Exim now forbids the simultaneous setting of
2484 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2485 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2486 entry if you want to know the details. The fix, however, neglected to
2487 consider the case when local delivery batching is involved. The test for
2488 "previously delivered" was not happening when checking to see if an
2489 address could be batched with a previous (undelivered) one; under
2490 certain circumstances this could lead to multiple deliveries to the same
2493 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2494 in its include files, and this causes problems building Exim.
2496 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2497 header_syntax) but Exim was just ignoring anything given after a slash.
2498 In particular, this caused confusion with an attempt to use "verify =
2499 reverse_host_lookup/defer_ok". An error is now given when options are
2500 supplied for verify items that do not have them. (Maybe reverse_host_
2501 lookup should have a defer_ok option, but that's a different point.)
2503 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2504 defined by RFC 821) to 2048, because there were problems with some AUTH
2505 commands, and RFC 1869 says the size should be increased for extended
2506 SMTP commands that take arguments.
2508 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2511 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2512 "unknown" error; now it says that the functionality isn't in the binary.
2514 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2515 an address' error message when a string expansion fails (syntax or
2516 whatever). Otherwise the password may appear in the log. Following change
2517 PH/42 below, there is no longer a chance of it appearing in a bounce
2520 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2522 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2523 of its addresses was ever tried. (Bugzilla bug #2.)
2525 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2526 the result incorrectly in the debug output. (It correctly added a newline
2527 to what was transported.)
2529 TF/01 Added $received_time.
2531 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2532 commented out examples of how to interface to a virus scanner and to
2533 SpamAssassin. Also added commented examples of av_scanner and
2534 spamd_address settings.
2536 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2537 and controls are allowed in which ACLs. There were a couple of minor
2538 errors. Some of the entries in the conditions table (which is a table of
2539 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2540 negation of where the condition IS allowed.
2542 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2544 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2545 header file does not have a version number, so I've had to invent a new
2546 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2547 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2548 radiusclient), but it was contributed by a Radius user.
2550 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2551 files or directories, for OpenSSL.
2553 PH/19 When an Exim process that is running as root has to create an Exim log
2554 file, it does so in a subprocess that runs as exim:exim so as to get the
2555 ownership right at creation (otherwise, other Exim processes might see
2556 the file with the wrong ownership). There was no test for failure of this
2557 fork() call, which would lead to the process getting stuck as it waited
2558 for a non-existent subprocess. Forks do occasionally fail when resources
2559 run out. I reviewed all the other calls to fork(); they all seem to check
2562 PH/20 When checking for unexpected SMTP input at connect time (before writing
2563 the banner), Exim was not dealing correctly with a non-positive return
2564 from the read() function. If the client had disconnected by this time,
2565 the result was a log entry for a synchronization error with an empty
2566 string after "input=" when read() returned zero. If read() returned -1
2567 (an event I could not check), uninitialized data bytes were printed.
2568 There were reports of junk text (parts of files, etc) appearing after
2571 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2573 PH/22 Added support for macro redefinition, and (re)definition in between
2574 driver and ACL definitions.
2576 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2577 forgetting to use the resulting value; it was using the unexpanded value.
2579 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2580 hadn't been configured. The fix is from Juergen Kreileder, who
2581 understands it better than I do:
2583 "Here's what I see happening with three configured cyrus_sasl
2584 authenticators configured (plain, login, cram-md5):
2586 On startup auth_cyrus_sasl_init() gets called for each of these.
2587 This means three calls to sasl_listmech() without a specified mech_list.
2588 => SASL tests which mechs of all available mechs actually work
2589 => three warnings about OTP not working
2590 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2592 With the patch, sasl_listmech() also gets called three times. But now
2593 SASL's mech_list option is set to the server_mech specified in the the
2594 authenticator. Or in other words, the answer from sasl_listmech()
2595 gets limited to just the mech you're testing for (which is different
2597 => the return list contains just 'plain' or 'login', 'cram-md5' or
2598 nothing depending on the value of ob->server_mech.
2600 I've just tested the patch: Authentication still works fine,
2601 unavailable mechs specified in the exim configuration are still
2602 caught, and the auth.log warnings about OTP are gone."
2604 PH/25 When debugging is enabled, the contents of the command line are added
2605 to the debugging output, even when log_selector=+arguments is not
2608 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2609 answer is "GNU", and only if the return is "GNU/something" is the answer
2612 PH/27 $acl_verify_message is now set immediately after the failure of a
2613 verification in an ACL, and so is available in subsequent modifiers. In
2614 particular, the message can be preserved by coding like this:
2616 warn !verify = sender
2617 set acl_m0 = $acl_verify_message
2619 Previously, $acl_verify_message was set only while expanding "message"
2620 and "log_message" when a very denied access.
2622 PH/28 Modified OS/os.c-Linux with
2624 -#ifndef OS_LOAD_AVERAGE
2625 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2627 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2628 nomenclature these days.)
2630 PH/29 Installed patch from the Sieve maintainer that adds the options
2631 sieve_useraddress and sieve_subaddress to the redirect router.
2633 PH/30 In these circumstances:
2634 . Two addresses routed to the same list of hosts;
2635 . First host does not offer TLS;
2636 . First host accepts first address;
2637 . First host gives temporary error to second address;
2638 . Second host offers TLS and a TLS session is established;
2639 . Second host accepts second address.
2640 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2641 and peerdn, if requested) that were in fact used only for the second
2644 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2645 attention to any local part prefix or suffix that was matched by the
2646 router that accepted the address. It now behaves in the same way as it
2647 does for delivery: the affixes are removed from the local part unless
2648 rcpt_include_affixes is set on the transport.
2650 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2651 timeout during the DATA phase of an incoming message.
2653 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2654 applied a patch sanctioned by the Sieve maintainer.
2656 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2657 the uid or gid is negative. A case of a negative gid caused this to be
2658 noticed. The fix allows for either to be negative.
2660 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2661 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2664 PH/36 The change PH/12 above was broken. Fixed it.
2666 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2667 the grounds that routing the same address twice would always produce the
2668 same answer. This might have been true once, but it is certainly no
2669 longer true now. Routing a child address may depend on the previous
2670 routing that produced that child. Some complicated redirection strategies
2671 went wrong when messages had multiple recipients, and made Exim's
2672 behaviour dependent on the order in which the addresses were given.
2674 I have moved the duplicate checking until after the routing is complete.
2675 Exim scans the addresses that are assigned to local and remote
2676 transports, and removes any duplicates. This means that more work will be
2677 done, as duplicates will always all be routed, but duplicates are
2678 presumably rare, so I don't expect this is of any significance.
2680 For deliveries to pipes, files, and autoreplies, the duplicate checking
2681 still happens during the routing process, since they are not going to be
2684 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2685 It corrects a timeout issue with spamd. This is Ian's comment: "The
2686 background is that sometimes spamd either never reads data from a
2687 connection it has accepted, or it never writes response data. The exiscan
2688 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2689 blindly assumes that writes won't block so it may never time out."
2691 PH/39 Allow G after quota size as well as K and M.
2693 PH/40 The value set for $authenticated_id in an authenticator may not contain
2694 binary zeroes or newlines because the value is written to log lines and
2695 to spool files. There was no check on this. Now the value is run through
2696 the string_printing() function so that such characters are converted to
2697 printable escape sequences.
2699 PH/41 $message_linecount is a new variable that contains the total number of
2700 lines in the message. Compare $body_linecount, which is the count for the
2703 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2704 bounce and delay warning messages, except in certain special cases, which
2707 (a) An SMTP error message from a remote host;
2708 (b) A message specified in a :fail: redirection;
2709 (c) A message specified in a "fail" command in a system filter;
2710 (d) A message specified in a FAIL return from the queryprogram router;
2711 (e) A message specified by the cannot_route_message router option.
2713 In these cases only, Exim does include the error details in bounce and
2714 warning messages. There are also a few cases where bland messages such
2715 as "unrouteable address" or "local delivery error" are given.
2717 PH/43 $value is now also set for the "else" part of a ${run expansion.
2719 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2720 being worked on, but at least Exim now implements the latest version to
2723 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2724 process to complete was treated as a delivery failure, a timeout while
2725 writing the message to the pipe was logged, but erroneously treated as a
2726 successful delivery. Such timeouts include transport filter timeouts. For
2727 consistency with the overall process timeout, these timeouts are now
2728 treated as errors, giving rise to delivery failures by default. However,
2729 there is now a new Boolean option for the pipe transport called
2730 timeout_defer, which, if set TRUE, converts the failures into defers for
2731 both kinds of timeout. A transport filter timeout is now identified in
2734 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2735 systems where "make" and "gmake" are different, calling "gmake" at top
2736 level broke things. I've arranged for the value of $(MAKE) to be passed
2737 from the Makefile to this script so that it can call the same version of
2741 A note about Exim versions 4.44 and 4.50
2742 ----------------------------------------
2744 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2745 changes of various kinds. As a consequence, a big documentation update was
2746 needed. This delayed the release for rather longer than seemed good, especially
2747 in the light of a couple of (minor) security issues. Therefore, the changes
2748 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2749 release. So 4.44 and 4.50 are in effect two different branches that both start
2752 I have left the 4.50 change log unchanged; it contains all the changes since
2753 4.43. The change log for 4.44 is below; many of its items are identical to
2754 those for 4.50. This seems to be the most sensible way to preserve the
2755 historical information.
2761 1. Minor wording change to the doc/README.SIEVE file.
2763 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2764 computation of the current number of files was incorrect.
2766 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2767 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2770 4. Give more explanation in the error message when the command for a transport
2771 filter fails to execute.
2773 5. There are several places where Exim runs a non-Exim command in a
2774 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2775 was being done only for the command run by the queryprogram router. It is
2776 now done for all such subprocesses. The other cases are: ${run, transport
2777 filters, and the commands run by the lmtp and pipe transports.
2779 6. Added CONFIGURE_GROUP build-time option.
2781 7. Some older OS have a limit of 256 on the maximum number of file
2782 descriptors. Exim was using setrlimit() to set 1000 as a large value
2783 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2784 systems. I've change it so that if it can't get 1000, it tries for 256.
2786 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2787 was an oversight, and furthermore, ever since the addition of extra
2788 controls (e.g. 4.43/32), the checks on when to allow different forms of
2789 "control" were broken. There should now be diagnostics for all cases when a
2790 control that does not make sense is encountered.
2792 9. Added the /retain_sender option to "control=submission".
2794 10. $recipients is now available in the predata ACL (oversight).
2796 11. Tidy the search cache before the fork to do a delivery from a message
2797 received from the command line. Otherwise the child will trigger a lookup
2798 failure and thereby defer the delivery if it tries to use (for example) a
2799 cached ldap connection that the parent has called unbind on.
2801 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2802 of $address_data from the recipient verification was clobbered by the
2803 sender verification.
2805 13. The value of address_data from a sender verification is now available in
2806 $sender_address_data in subsequent conditions in the ACL statement.
2808 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2810 15. Added a new option "connect=<time>" to callout options, to set a different
2813 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2814 was its contents. (It was OK if the option was not defined at all.)
2816 17. A "Completed" log line is now written for messages that are removed from
2817 the spool by the -Mrm option.
2819 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2820 information about exactly what failed.
2822 19. Added -dd to debug only the daemon process.
2824 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2825 handles timeouts, both on the server side and network timeouts. Renamed the
2826 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2828 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2829 It is now set to "smtps".
2831 22. $host_address is now set to the target address during the checking of
2832 ignore_target_hosts.
2834 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2835 being passed; this would have caused $sender_host_name to have been used if
2836 matching the list had actually called for a host name (not very likely,
2837 since this list is usually IP addresses). A host name is now passed as
2840 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2841 code that specifies a non-restarting handler (typically sigaction() in
2842 modern systems) in an attempt to fix a rare and obscure crash bug.
2844 25. Narrowed the window for a race in the daemon that could cause it to ignore
2845 SIGCHLD signals. This is not a major problem, because they are used only to
2846 wake it up if nothing else does.
2848 26. A malformed maildirsize file could cause Exim to calculate negative values
2849 for the mailbox size or file count. Odd effects could occur as a result.
2850 The maildirsize information is now recalculated if the size or filecount
2853 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2854 support for a long time. Removed HAVE_SYS_VFS_H.
2856 28. Installed the latest version of exipick from John Jetmore.
2858 29. In an address list, if the pattern was not a regular expression, an empty
2859 subject address (from a bounce message) matched only if the pattern was an
2860 empty string. Non-empty patterns were not even tested. This was the wrong
2861 because it is perfectly reasonable to use an empty address as part of a
2862 database query. An empty address is now tested by patterns that are
2863 lookups. However, all the other forms of pattern expect the subject to
2864 contain a local part and a domain, and therefore, for them, an empty
2865 address still always fails if the pattern is not itself empty.
2867 30. Exim went into a mad DNS loop when attempting to do a callout where the
2868 host was specified on an smtp transport, and looking it up yielded more
2869 than one IP address.
2871 31. Re-factored the code for checking spool and log partition space into a
2872 function that finds that data and another that does the check. The former
2873 is then used to implement four new variables: $spool_space, $log_space,
2874 $spool_inodes, and $log_inodes.
2876 32. The RFC2047 encoding function was originally intended for short strings
2877 such as real names; it was not keeping to the 75-character limit for
2878 encoded words that the RFC imposes. It now respects the limit, and
2879 generates multiple encoded words if necessary. To be on the safe side, I
2880 have increased the buffer size for the ${rfc2047: expansion operator from
2883 33. It is now permitted to omit both strings after an "if" condition; if the
2884 condition is true, the result is "true". As before, when the second string
2885 is omitted, a false condition yields an empty string. This makes it less
2886 cumbersome to write custom ACL and router conditions.
2888 34. Failure to deliver a bounce message always caused it to be frozen, even if
2889 there was an errors_to setting on the router. The errors_to setting is now
2892 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2893 canonical form (fully expanded) before being placed in
2894 $sender_host_address.
2896 36. The table in the code that translates DNS record types into text (T_A to
2897 "A" for instance) was missing entries for NS and CNAME. It is just possible
2898 that this could have caused confusion if both these types were looked up
2899 for the same domain, because the text type is used as part of Exim's
2900 per-process caching. But the chance of anyone hitting this buglet seems
2903 37. The dnsdb lookup has been extended in a number of ways.
2905 (1) There is a new type, "zns", which walks up the domain tree until it
2906 finds some nameserver records. It should be used with care.
2908 (2) There is a new type, "mxh", which is like "mx" except that it returns
2909 just the host names, not the priorities.
2911 (3) It is now possible to give a list of domains (or IP addresses) to be
2912 looked up. The behaviour when one of the lookups defers can be
2913 controlled by a keyword.
2915 (4) It is now possible to specify the separator character for use when
2916 multiple records are returned.
2918 38. The dnslists ACL condition has been extended: it is now possible to supply
2919 a list of IP addresses and/or domains to be looked up in a particular DNS
2922 39. Added log_selector=+queue_time_overall.
2924 40. When running the queue in the test harness, wait just a tad after forking a
2925 delivery process, to get repeatability of debugging output.
2927 41. Include certificate and key file names in error message when GnuTLS fails
2928 to set them up, because the GnuTLS error message doesn't include the name
2929 of the failing file when there is a problem reading it.
2931 42. Allow both -bf and -bF in the same test run.
2933 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2935 44. The "Exiscan patch" is now merged into the mainline Exim source.
2937 45. Sometimes the final signoff response after QUIT could fail to get
2938 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2939 < 0 before doing a fflush(). This bug looks as though it goes back to the
2940 introduction of TLS in release 3.20, but "sometimes" must have been rare
2941 because the tests only now provoked it.
2943 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2944 (this can affect the format of dates).
2946 47. exim_tidydb, when checking for the continued existence of a message for
2947 which it has found a message-specific retry record, was not finding
2948 messages that were in split spool directories. Consequently, it was
2949 deleting retry records that should have stayed in existence.
2951 48. Steve fixed some bugs in eximstats.
2953 49. The SPA authentication driver was not abandoning authentication and moving
2954 on to the next authenticator when an expansion was forced to fail,
2955 contradicting the general specification for all authenticators. Instead it
2956 was generating a temporary error. It now behaves as specified.
2958 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2959 (the order specifies the preference for clients). The order is now AES256,
2960 AES128, 3DES, ARCFOUR128.
2962 51. Small patch to Sieve code - explicitly set From: when generating an
2965 52. Exim crashed if a remote delivery caused a very long error message to be
2966 recorded - for instance if somebody sent an entire SpamAssassin report back
2967 as a large number of 550 error lines. This bug was coincidentally fixed by
2968 increasing the size of one of Exim's internal buffers (big_buffer) that
2969 happened as part of the Exiscan merge. However, to be on the safe side, I
2970 have made the code more robust (and fixed the comments that describe what
2973 53. Now that there can be additional text after "Completed" in log lines (if
2974 the queue_time_overall log selector is set), a one-byte patch to exigrep
2975 was needed to allow it to recognize "Completed" as not the last thing in
2978 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2979 patch that reportedly fixes this has been added. I am not expert enough to
2980 create a test for it. This is what the patch creator wrote:
2982 "I found a little strange behaviour of ldap code when working with
2983 Windows 2003 AD Domain, where users was placed in more than one
2984 Organization Units. When I tried to give exim partial DN, the exit code
2985 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2986 But simultaneously result of request was absolutely normal ldap result,
2987 so I produce this patch..."
2989 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2990 REFERENCE, so I have modified the code to exclude the patch when that macro
2993 55. Some experimental protocols are using DNS PTR records for new purposes. The
2994 keys for these records are domain names, not reversed IP addresses. The
2995 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2996 leaves it alone. Component reversal etc. now happens only for IP addresses.
2999 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3001 57. Double the size of the debug message buffer (to 2048) so that more of very
3002 long debug lines gets shown.
3004 58. The exicyclog utility now does better if the number of log files to keep
3005 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3007 59. Two changes related to the smtp_active_hostname option:
3009 (1) $smtp_active_hostname is now available as a variable.
3010 (2) The default for smtp_banner uses $smtp_active_hostname instead
3011 of $primary_hostname.
3013 60. The host_aton() function is supposed to be passed a string that is known
3014 to be a valid IP address. However, in the case of IPv6 addresses, it was
3015 not checking this. This is a hostage to fortune. Exim now panics and dies
3016 if the condition is not met. A case was found where this could be provoked
3017 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3018 components; fortuitously, this particular loophole had already been fixed
3019 by change 4.50/55 above.
3021 If there are any other similar loopholes, the new check in host_aton()
3022 itself should stop them being exploited. The report I received stated that
3023 data on the command line could provoke the exploit when Exim was running as
3024 exim, but did not say which command line option was involved. All I could
3025 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3026 running as the user.
3029 61. There was a buffer overflow vulnerability in the SPA authentication code
3030 (which came originally from the Samba project). I have added a test to the
3031 spa_base64_to_bits() function which I hope fixes it.
3034 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3035 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3037 63. The daemon start-up calls getloadavg() while still root for those OS that
3038 need the first call to be done as root, but it missed one case: when
3039 deliver_queue_load_max is set with deliver_drop_privilege. This is
3040 necessary for the benefit of the queue runner, because there is no re-exec
3041 when deliver_drop_privilege is set.
3043 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3044 This has been fixed.
3046 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3047 was in use, was not putting the data itself into the right store pool;
3048 consequently, it could be overwritten for a subsequent message in the same
3049 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3052 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3054 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3055 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3056 the function were treating the return as a boolean value, which happened to
3057 work because 0=false and not-0=true, but is not correct code.
3059 68. The host_aton() function was not handling scoped IPv6 addresses (those
3060 with, for example, "%eth0" on the end) correctly.
3062 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3063 negated items (that is, ~something) in unsigned ints. Some compilers
3064 apparently mutter when there is no cast.
3066 70. If an address verification called from an ACL failed, and did not produce a
3067 user-specific message (i.e. there was only a "system" message), nothing was
3068 put in $acl_verify_message. In this situation, it now puts the system
3071 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3072 session; change 4.31/43 added the unwanted input to the log line - except
3073 that it did not do this in the start of session case. It now does.
3075 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3076 This is wrong and can cause the other end to generate a synchronization
3077 error if it is another Exim or anything else that does the synchronization
3078 check. A QUIT command is no longer sent after a timeout.
3080 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3081 during host lookups.
3083 74. The defer_ok option of callout verification was not working if it was used
3084 when verifying addresses in header lines, that is, for this case:
3086 verify = header_sender/callout=defer_ok
3088 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3089 those file descriptors could be used for SMTP connections. If anything
3090 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3091 could be sent to the SMTP client, causing chaos. The daemon now opens
3092 stdin, stdout, and stderr to /dev/null when it puts itself into the
3095 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3096 log by default. The user can override this with suitable Perl magic.
3098 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3099 the log message when discard triggers, was not working for the DATA ACL or
3100 for the non-SMTP ACL.
3102 78. Error message wording change in sieve.c.
3104 79. If smtp_accept_max_per_host was set, the number of connections could be
3105 restricted to fewer than expected, because the daemon was trying to set up
3106 a new connection before checking whether the processes handling previous
3107 connections had finished. The check for completed processes is now done
3108 earlier. On busy systems, this bug wouldn't be noticed because something
3109 else would have woken the daemon, and it would have reaped the completed
3112 80. If a message was submitted locally by a user whose login name contained one
3113 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3114 It caused a spool format error. I have fixed the spool reading code. A
3115 related problem was that the "from" clause in the Received: line became
3116 illegal because of the space(s). It is now covered by ${quote_local_part.
3118 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3121 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3123 83. Patch from Sieve maintainer to fix unterminated string problem in
3124 "vacation" handling.
3126 84. Some minor changes to the Linux configuration files to help with other
3127 OS variants using glibc.
3129 85. One more patch for Sieve to update vacation handling to latest spec.
3132 ----------------------------------------------------
3133 See the note above about the 4.44 and 4.50 releases.
3134 ----------------------------------------------------
3140 1. Change 4.43/35 introduced a bug that caused file counts to be
3141 incorrectly computed when quota_filecount was set in an appendfile
3144 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3145 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3148 3. Give more explanation in the error message when the command for a transport
3149 filter fails to execute.
3151 4. There are several places where Exim runs a non-Exim command in a
3152 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3153 was being done only for the command run by the queryprogram router. It is
3154 now done for all such subprocesses. The other cases are: ${run, transport
3155 filters, and the commands run by the lmtp and pipe transports.
3157 5. Some older OS have a limit of 256 on the maximum number of file
3158 descriptors. Exim was using setrlimit() to set 1000 as a large value
3159 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3160 systems. I've change it so that if it can't get 1000, it tries for 256.
3162 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3163 was an oversight, and furthermore, ever since the addition of extra
3164 controls (e.g. 4.43/32), the checks on when to allow different forms of
3165 "control" were broken. There should now be diagnostics for all cases when a
3166 control that does not make sense is encountered.
3168 7. $recipients is now available in the predata ACL (oversight).
3170 8. Tidy the search cache before the fork to do a delivery from a message
3171 received from the command line. Otherwise the child will trigger a lookup
3172 failure and thereby defer the delivery if it tries to use (for example) a
3173 cached ldap connection that the parent has called unbind on.
3175 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3176 of $address_data from the recipient verification was clobbered by the
3177 sender verification.
3179 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3180 was its contents. (It was OK if the option was not defined at all.)
3182 11. A "Completed" log line is now written for messages that are removed from
3183 the spool by the -Mrm option.
3185 12. $host_address is now set to the target address during the checking of
3186 ignore_target_hosts.
3188 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3189 being passed; this would have caused $sender_host_name to have been used if
3190 matching the list had actually called for a host name (not very likely,
3191 since this list is usually IP addresses). A host name is now passed as
3194 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3195 code that specifies a non-restarting handler (typically sigaction() in
3196 modern systems) in an attempt to fix a rare and obscure crash bug.
3198 15. Narrowed the window for a race in the daemon that could cause it to ignore
3199 SIGCHLD signals. This is not a major problem, because they are used only to
3200 wake it up if nothing else does.
3202 16. A malformed maildirsize file could cause Exim to calculate negative values
3203 for the mailbox size or file count. Odd effects could occur as a result.
3204 The maildirsize information is now recalculated if the size or filecount
3207 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3208 support for a long time. Removed HAVE_SYS_VFS_H.
3210 18. Updated exipick to current release from John Jetmore.
3212 19. Allow an empty sender to be matched against a lookup in an address list.
3213 Previously the only cases considered were a regular expression, or an
3216 20. Exim went into a mad DNS lookup loop when doing a callout where the
3217 host was specified on the transport, if the DNS lookup yielded more than
3220 21. The RFC2047 encoding function was originally intended for short strings
3221 such as real names; it was not keeping to the 75-character limit for
3222 encoded words that the RFC imposes. It now respects the limit, and
3223 generates multiple encoded words if necessary. To be on the safe side, I
3224 have increased the buffer size for the ${rfc2047: expansion operator from
3227 22. Failure to deliver a bounce message always caused it to be frozen, even if
3228 there was an errors_to setting on the router. The errors_to setting is now
3231 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3232 canonical form (fully expanded) before being placed in
3233 $sender_host_address.
3235 24. Updated eximstats to version 1.33
3237 25. Include certificate and key file names in error message when GnuTLS fails
3238 to set them up, because the GnuTLS error message doesn't include the name
3239 of the failing file when there is a problem reading it.
3241 26. Expand error message when OpenSSL has problems setting up cert/key files.
3244 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3245 (this can affect the format of dates).
3247 28. exim_tidydb, when checking for the continued existence of a message for
3248 which it has found a message-specific retry record, was not finding
3249 messages that were in split spool directories. Consequently, it was
3250 deleting retry records that should have stayed in existence.
3252 29. eximstats updated to version 1.35
3253 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3254 1.35 - bugfix such that pie charts by volume are generated correctly
3256 30. The SPA authentication driver was not abandoning authentication and moving
3257 on to the next authenticator when an expansion was forced to fail,
3258 contradicting the general specification for all authenticators. Instead it
3259 was generating a temporary error. It now behaves as specified.
3261 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3262 (the order specifies the preference for clients). The order is now AES256,
3263 AES128, 3DES, ARCFOUR128.
3265 31. Small patch to Sieve code - explicitly set From: when generating an
3268 32. Exim crashed if a remote delivery caused a very long error message to be
3269 recorded - for instance if somebody sent an entire SpamAssassin report back
3270 as a large number of 550 error lines. This bug was coincidentally fixed by
3271 increasing the size of one of Exim's internal buffers (big_buffer) that
3272 happened as part of the Exiscan merge. However, to be on the safe side, I
3273 have made the code more robust (and fixed the comments that describe what
3276 33. Some experimental protocols are using DNS PTR records for new purposes. The
3277 keys for these records are domain names, not reversed IP addresses. The
3278 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3279 leaves it alone. Component reversal etc. now happens only for IP addresses.
3282 34. The host_aton() function is supposed to be passed a string that is known
3283 to be a valid IP address. However, in the case of IPv6 addresses, it was
3284 not checking this. This is a hostage to fortune. Exim now panics and dies
3285 if the condition is not met. A case was found where this could be provoked
3286 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3287 components; fortuitously, this particular loophole had already been fixed
3288 by change 4.50/55 or 4.44/33 above.
3290 If there are any other similar loopholes, the new check in host_aton()
3291 itself should stop them being exploited. The report I received stated that
3292 data on the command line could provoke the exploit when Exim was running as
3293 exim, but did not say which command line option was involved. All I could
3294 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3295 running as the user.
3298 35. There was a buffer overflow vulnerability in the SPA authentication code
3299 (which came originally from the Samba project). I have added a test to the
3300 spa_base64_to_bits() function which I hope fixes it.
3303 36. The daemon start-up calls getloadavg() while still root for those OS that
3304 need the first call to be done as root, but it missed one case: when
3305 deliver_queue_load_max is set with deliver_drop_privilege. This is
3306 necessary for the benefit of the queue runner, because there is no re-exec
3307 when deliver_drop_privilege is set.
3309 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3310 was in use, was not putting the data itself into the right store pool;
3311 consequently, it could be overwritten for a subsequent message in the same
3312 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3315 38. Sometimes the final signoff response after QUIT could fail to get
3316 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3317 < 0 before doing a fflush(). This bug looks as though it goes back to the
3318 introduction of TLS in release 3.20, but "sometimes" must have been rare
3319 because the tests only now provoked it.
3325 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3326 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3327 Now it returns an integer. A number of calls were still expecting a T/F
3328 return. Fortuitously, in all cases, the tests worked in OK situations,
3329 which is the norm. However, things would have gone wrong on any write
3330 failures on the smtp file descriptor. This function is used when sending
3331 messages over SMTP and also when doing verify callouts.
3333 2. When Exim is called to do synchronous delivery of a locally submitted
3334 message (the -odf or -odi options), it no longer closes stderr before doing
3337 3. Implemented the mua_wrapper option.
3339 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3341 5. Implemented the functions header_remove(), header_testname(),
3342 header_add_at_position(), and receive_remove_recipient(), and exported them
3345 6. If an ACL "warn" statement specified the addition of headers, Exim already
3346 inserted X-ACL-Warn: at the start if there was no header name. However, it
3347 was not making this test for the second and subsequent header lines if
3348 there were newlines in the string. This meant that an invalid header could
3349 be inserted if Exim was badly configured.
3351 7. Allow an ACL "warn" statement to add header lines at the start or after all
3352 the Received: headers, as well as at the end.
3354 8. Added the rcpt_4xx retry error code.
3356 9. Added postmaster_mailfrom=xxx to callout verification option.
3358 10. Added mailfrom=xxxx to the callout verification option, for verify=
3361 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3362 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3364 12. Inserted some casts to stop certain compilers warning when using pointer
3365 differences as field lengths or precisions in printf-type calls (mostly
3366 affecting debugging statements).
3368 13. Added optional readline() support for -be (dynamically loaded).
3370 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3371 same clock tick as a message's arrival, so that its received time was the
3372 same as the "first fail" time on the retry record, and that message
3373 remained on the queue past the ultimate address timeout, every queue runner
3374 would try a delivery (because it was past the ultimate address timeout) but
3375 after another failure, the ultimate address timeout, which should have then
3376 bounced the address, did not kick in. This was a "< instead of <=" error;
3377 in most cases the first failure would have been in the next clock tick
3378 after the received time, and all would be well.
3380 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3381 being recognized when the domain list was tested by the match_domain
3382 condition in an expansion string.
3384 16. Added the ${str2b64: operator.
3386 17. Exim was always calling setrlimit() to set a large limit for the number of
3387 processes, without checking whether the existing limit was already
3388 adequate. (It did check for the limit on file descriptors.) Furthermore,
3389 errors from getrlimit() and setrlimit() were being ignored. Now they are
3390 logged to the main and panic logs, but Exim does carry on, to try to do its
3391 job under whatever limits there are.
3393 18. Imported PCRE 5.0.
3395 19. Trivial typo in log message " temporarily refused connection" (the leading
3398 20. If the log selector return_path_on_delivery was set and an address was
3399 redirected to /dev/null, the delivery process crashed because it assumed
3400 that a return path would always be set for a "successful" delivery. In this
3401 case, the whole delivery is bypassed as an optimization, and therefore no
3404 21. Internal re-arrangement: the function for sending a challenge and reading
3405 a response while authentication was assuming a zero-terminated challenge
3406 string. It's now changed to take a pointer and a length, to allow for
3407 binary data in such strings.
3409 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3411 23. Exim was not respecting finduser_retries when seeking the login of the
3412 uid under which it was called; it was always trying 10 times. (The default
3413 setting of finduser_retries is zero.) Also, it was sleeping after the final
3414 failure, which is pointless.
3416 24. Implemented tls_on_connect_ports.
3418 25. Implemented acl_smtp_predata.
3420 26. If the domain in control=submission is set empty, Exim assumes that the
3421 authenticated id is a complete email address when it generates From: or
3422 Sender: header lines.
3424 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3425 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3426 chown and chgrp in /bin and hostname in /usr/bin.
3428 28. Exim was keeping the "process log" file open after each use, just as it
3429 does for the main log. This opens the possibility of it remaining open for
3430 long periods when the USR1 signal hits a daemon. Occasional processlog
3431 errors were reported, that could have been caused by this. Anyway, it seems
3432 much more sensible not to leave this file open at all, so that is what now
3435 29. The long-running daemon process does not normally write to the log once it
3436 has entered its main loop, and it closes the log before doing so. This is
3437 so that log files can straightforwardly be renamed and moved. However,
3438 there are a couple of unusual error situations where the daemon does write
3439 log entries, and I had neglected to close the log afterwards.
3441 30. The text of an SMTP error response that was received during a remote
3442 delivery was being truncated at 512 bytes. This is too short for some of
3443 the long messages that one sometimes sees. I've increased the limit to
3446 31. It is now possible to make retry rules that apply only when a message has a
3447 specific sender, in particular, an empty sender.
3449 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3450 it possible to be selective about when SMTP synchronization is enforced.
3452 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3454 32. Implemented hosts_connection_nolog.
3456 33. Added an ACL for QUIT.
3458 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3461 35. Added mailbox_size and mailbox_filecount to appendfile.
3463 36. Added control = no_multiline_responses to ACLs.
3465 37. There was a bug in the logic of the code that waits for the clock to tick
3466 in the case where the clock went backwards by a substantial amount such
3467 that the microsecond fraction of "now" was more than the microsecond
3468 fraction of "then" (but the whole seconds number was less).
3470 38. Added support for the libradius Radius client library this is found on
3471 FreeBSD (previously only the radiusclient library was supported).
3477 1. When certain lookups returned multiple values in the form name=value, the
3478 quoting of the values was not always being done properly. Specifically:
3479 (a) If the value started with a double quote, but contained no whitespace,
3481 (b) If the value contained whitespace other than a space character (i.e.
3482 tabs or newlines or carriage returns) it was not quoted.
3483 This fix has been applied to the mysql and pgsql lookups by writing a
3484 separate quoting function and calling it from the lookup code. The fix
3485 should probably also be applied to nisplus, ibase and oracle lookups, but
3486 since I cannot test any of those, I have not disturbed their existing code.
3488 2. A hit in the callout cache for a specific address caused a log line with no
3489 reason for rejecting RCPT. Now it says "Previous (cached) callout
3490 verification failure".
3492 3. There was an off-by-one bug in the queryprogram router. An over-long
3493 return line was truncated at 256 instead of 255 characters, thereby
3494 overflowing its buffer with the terminating zero. As well as fixing this, I
3495 have increased the buffer size to 1024 (and made a note to document this).
3497 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3498 when Exim is waiting for an SMTP response from a remote server, Exim
3499 restarts its select() call on the socket, thereby resetting its timeout.
3500 This is not a problem when such interrupts are rare. Somebody set up a cron
3501 job to run exiwhat every 2 minutes, which is less than the normal select()
3502 timeout (5 or 10 minutes). This meant that the select() timeout never
3503 kicked in because it was always reset. I have fixed this by comparing the
3504 time when an interrupt arrives with the time at the start of the first call
3505 to select(). If more time than the timeout has elapsed, the interrupt is
3506 treated as a timeout.
3508 5. Some internal re-factoring in preparation for the addition of Sieve
3509 extensions (by MH). In particular, the "personal" test is moved to a
3510 separate function, and given an option for scanning Cc: and Bcc: (which is
3511 not set for Exim filters).
3513 6. When Exim created an email address using the login of the caller as the
3514 local part (e.g. when creating a From: or Sender: header line), it was not
3515 quoting the local part when it contained special characters such as @.
3517 7. Installed new OpenBSD configuration files.
3519 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3520 try to make them clearer.
3522 9. Callout options, other than the timeout value, were being ignored when
3523 verifying sender addresses in header lines. For example, when using
3525 verify = header_sender/callout=no_cache
3527 the cache was (incorrectly) being used.
3529 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3530 only the Cygwin environment.
3532 11. When return_path_on_delivery was set as a log selector, if different remote
3533 addresses in the same message used different return paths and parallel
3534 remote delivery occurred, the wrong values would sometimes be logged.
3535 (Whenever a remote delivery process finished, the return path value from
3536 the most recently started remote delivery process was logged.)
3538 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3539 lines when AUTH and/or TLS are in use. This is the "received protocol"
3540 field. Exim used to use "asmtp" for authenticated SMTP, without any
3541 indication (in the protocol name) for TLS use. Now it follows the RFC and
3542 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3543 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3544 names appear in log lines as well as in Received: header lines.
3546 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3547 extensions, and comparison tests, and to fix some bugs.
3549 14. Changes to the "personal" filter test:
3551 (1) The test was buggy in that it was just doing the equivalent of
3552 "contains" tests on header lines. For example, if a user's address was
3553 anne@some.where, the "personal" test would incorrectly be true for
3555 To: susanne@some.where
3557 This test is now done by extracting each address from the header in turn,
3558 and checking the entire address. Other tests that are part of "personal"
3559 are now done using regular expressions (for example, to check local parts
3560 of addresses in From: header lines).
3562 (2) The list of non-personal local parts in From: addresses has been
3563 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3564 taken from the Sieve specification recommendations.
3566 (3) If the message contains any header line starting with "List-" it is
3567 treated as non-personal.
3569 (4) The test for "circular" in the Subject: header line has been removed
3570 because it now seems ill-conceived.
3572 15. Minor typos in src/EDITME comments corrected.
3574 16. Installed latest exipick from John Jetmore.
3576 17. If headers_add on a router specified a text string that was too long for
3577 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3578 of string_sprintf() is now avoided.
3580 18. $message_body_size was not set (it was always zero) when running the DATA
3581 ACL and the local_scan() function.
3583 19. For the "mail" command in an Exim filter, no default was being set for
3584 the once_repeat time, causing a random time value to be used if "once" was
3585 specified. (If the value happened to be <= 0, no repeat happened.) The
3586 default is now 0s, meaning "never repeat". The "vacation" command was OK
3587 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3588 (I found it when inspecting the code).
3590 20. There is now an overall timeout for performing a callout verification. It
3591 defaults to 4 times the callout timeout, which applies to individual SMTP
3592 commands during the callout. The overall timeout applies when there is more
3593 than one host that can be tried. The timeout is checked before trying the
3594 next host. This prevents very long delays if there are a large number of
3595 hosts and all are timing out (e.g. when the network connections are timing
3596 out). The value of the overall timeout can be changed by specifying an
3597 additional sub-option for "callout", called "maxwait". For example:
3599 verify = sender/callout=5s,maxwait=20s
3601 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3602 to the end before writing, but this should make it even safer).
3604 22. Exim was forgetting that it had advertised PIPELINING for the second and
3605 subsequent messages on an SMTP connection. It was also not resetting its
3606 memory on STARTTLS and an internal HELO.
3608 23. When Exim logs an SMTP synchronization error within a session, it now
3609 records whether PIPELINING has been advertised or not.
3611 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3612 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3613 rather than long int.
3615 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3617 26. Added the never_mail option to autoreply.
3623 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3624 crash if the getsockname() call failed; this can happen if a connection is
3625 closed very soon after it is established. The problem was simply in the
3626 order in which certain operations were done, causing Exim to try to write
3627 to the SMTP stream before it had set up the file descriptor. The bug has
3628 been fixed by making things happen in the correct order.
3634 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3635 before the connection was closed, thus losing the rejection response.
3637 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3638 some early Solaris releases, but causes trouble in current releases where
3639 socklen_t is defined.
3641 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3644 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3647 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3648 that releasing the top of it at the end releases what was used for sub-
3649 expansions (unless the block got too big). However, discard this block if
3650 the first thing is a variable or header, so that we can use its block when
3651 it is dynamic (useful for very large $message_headers, for example).
3653 6. Lookups now cache *every* query, not just the most recent. A new, separate
3654 store pool is used for this. It can be recovered when all lookup caches are
3655 flushed. Lookups now release memory at the end of their result strings.
3656 This has involved some general refactoring of the lookup sources.
3658 7. Some code has been added to the store_xxx() functions to reduce the amount
3659 of flapping under certain conditions.
3661 8. log_incoming_interface used to affect only the <= reception log lines. Now
3662 it causes the local interface and port to be added to several more SMTP log
3663 lines, for example "SMTP connection from", and rejection lines.
3665 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3667 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3669 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3670 could be overwritten at the end of the current message (or the start of a
3671 new message if it was set in a HELO ACL). The value is now preserved for
3672 the duration of the SMTP connection.
3674 12. If a transport had a headers_rewrite setting, and a matching header line
3675 contained an unqualified address, that address was qualified, even if it
3676 did not match any rewriting rules. The underlying bug was that the values
3677 of the flags that permit the existence of unqualified sender and recipient
3678 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3679 non-local messages, and by -bnq for local messages) were not being
3680 preserved with the message after it was received.
3682 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3683 "next input=" as part of the text comprising the host identity instead of
3684 the correct text. The code was using the same buffer for two different
3685 strings. However, depending on which order the printing function evaluated
3686 its arguments, the bug did not always show up. Under Linux, for example, my
3687 test suite worked just fine.
3689 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3690 doesn't work with some older versions of Perl. It has been changed to "my",
3691 which in any case is probably the better facility to use.
3693 15. A really picky compiler found some instances of statements for creating
3694 error messages that either had too many or two few arguments for the format
3697 16. The size of the buffer for calls to the DNS resolver has been increased
3698 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3699 for addresses that have a lot of PTR records. This alleviates a problem; it
3700 does not fully solve it.
3702 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3703 buffer now truncates the list and logs the incident, which is the same
3704 action as happens when Exim is looking up a host name and its aliases.
3705 Previously in this situation something unpredictable would happen;
3706 sometimes it was "internal error: store_reset failed".
3708 18. If a server dropped the connection unexpectedly when an Exim client was
3709 using GnuTLS and trying to read a response, the client delivery process
3710 crashed while trying to generate an error log message.
3712 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3713 string, for example:
3715 warn message = H1: something\nH2: something
3717 the text was added as a single header line from Exim's point of view
3718 though it ended up OK in the delivered message. However, searching for the
3719 second and subsequent header lines using $h_h2: did not work. This has been
3720 fixed. Similarly, if a system filter added multiple headers in this way,
3721 the routers could not see them.
3723 20. Expanded the error message when iplsearch is called with an invalid key to
3724 suggest using net-iplsearch in a host list.
3726 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3727 ACLs are no longer actually imposed (and a message to that effect is
3730 22. If a "gecos" field in a passwd entry contained escaped characters, in
3731 particular, if it contained a \" sequence, Exim got it wrong when building
3732 a From: or a Sender: header from that name. A second bug also caused
3733 incorrect handling when an unquoted " was present following a character
3734 that needed quoting.
3736 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3737 was not being matched caselessly.
3739 24. Arranged for all hyphens in the exim.8 source to be escaped with
3742 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3743 properly. Recipient callout cache records were still being keyed to include
3744 the sender, even when use_sender was set false. This led to far more
3745 callouts that were necessary. The sender is no longer included in the key
3746 when use_sender is false.
3748 26. Added "control = submission" modifier to ACLs.
3750 27. Added the ${base62d: operator to decode base 62 numbers.
3752 28. dnsdb lookups can now access SRV records.
3754 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3755 the configuration file.
3757 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3758 (-v) mode. This makes the output for a verbose queue run more intelligible.
3760 31. Added a use_postmaster feature to recipient callouts.
3762 32. Added the $body_zerocount variable, containing the number of binary zero
3763 bytes in the message body.
3765 33. The time of last modification of the "new" subdirectory is now used as the
3766 "mailbox time last read" when there is a quota error for a maildir
3769 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3771 35. Added +ignore_unknown as a special item in host lists.
3773 36. Code for decoding IPv6 addresses in host lists is now included, even if
3774 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3775 address was recognized as an IP address, but was then not correctly decoded
3776 into binary, causing unexpected and incorrect effects when compared with
3783 1. Very minor rewording of debugging text in manualroute to say "list of
3784 hosts" instead of "hostlist".
3786 2. If verify=header_syntax was set, and a header line with an unqualified
3787 address (no domain) and a large number of spaces between the end of the
3788 name and the colon was received, the reception process suffered a buffer
3789 overflow, and (when I tested it) crashed. This was caused by some obsolete
3790 code that should have been removed. The fix is to remove it!
3792 3. When running in the test harness, delay a bit after writing a bounce
3793 message to get a bit more predictability in the log output.
3795 4. Added a call to search_tidyup() just before forking a reception process. In
3796 theory, someone could use a lookup in the expansion of smtp_accept_max_
3797 per_host which, without the tidyup, could leave open a database connection.
3799 5. Added the variables $recipient_data and $sender_data which get set from a
3800 lookup success in an ACL "recipients" or "senders" condition, or a router
3801 "senders" option, similar to $domain_data and $local_part_data.
3803 6. Moved the writing of debug_print from before to after the "senders" test
3806 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3807 problems for message scanning, either using a data ACL, or using
3808 local_scan() because the Received: header was not generated till after they
3809 were called (in order to set the time as the time of reception completion).
3810 I have revised the way this works. The header is now generated after the
3811 body is received, but before the ACL or local_scan() are called. After they
3812 are run, the timestamp in the header is updated.
3818 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3819 before starting a queue runner without re-exec. This happened only when
3820 deliver_drop_privilege was set or when the Exim user was set to root. The
3821 effect of the bug was that timeouts during subsequent deliveries caused
3822 crashes instead of being properly handled. The handler is now left at its
3823 default (and expected) setting.
3825 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3826 message, again when deliver_drop_privilege is set or Exim is run as root.
3827 The bug described in (1) was not present in this case, but the tidying up
3828 of the other signals was missing. I have made the two cases consistent.
3830 3. The ignore_target_hosts setting on a manualroute router was being ignored
3831 for hosts that were looked up using the /MX notation.
3833 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3836 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3837 operated on the sender address. After changing the $sender_address to <>
3838 for the sender address verify, Exim was re-instated it as the original
3839 (before rewriting) address, but remembering that it had rewritten it, so it
3840 wasn't rewriting it again. This bug also had the effect of breaking the
3841 sender address verification caching when the sender address was rewritten.
3843 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3844 This has been changed so that if the ip literal address matches
3845 ignore_target_hosts, the router declines.
3847 7. Added expansion conditions match_domain, match_address, and match_local_
3848 part (NOT match_host).
3850 8. The placeholder for the Received: header didn't have a length field set.
3852 9. Added code to Exim itself and to exim_lock to test for a specific race
3853 condition that could lead to file corruption when using MBX delivery. The
3854 issue is with the lockfile that is created in /tmp. If this file is removed
3855 after a process has opened it but before that process has acquired a lock,
3856 there is the potential for a second process to recreate the file and also
3857 acquire a lock. This could lead to two Exim processes writing to the file
3858 at the same time. The added code performs the same test as UW imapd; it
3859 checks after acquiring the lock that its file descriptor still refers to
3860 the same named file.
3862 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3863 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3866 11. Added the smtp_active_hostname option. If used, this will typically be made
3867 to depend on the incoming interface address. Because $interface_address is
3868 not set up until the daemon has forked a reception process, error responses
3869 that can happen earlier (such as "too many connections") no longer contain
3872 12. If an expansion in a condition on a "warn" statement fails because a lookup
3873 defers, the "warn" statement is abandoned, and the next ACL statement is
3874 processed. Previously this caused the whole ACL to be aborted.
3876 13. Added the iplsearch lookup type.
3878 14. Added ident_timeout as a log selector.
3880 15. Added tls_certificate_verified as a log selector.
3882 16. Added a global option tls_require_ciphers (compare the smtp transport
3883 option of the same name). This controls incoming TLS connections.
3885 17. I finally figured out how to make tls_require_ciphers do a similar thing
3886 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3887 before starting the TLS session.
3889 18. Tabs are now shown as \t in -bP output.
3891 19. If the log selector return_path_on_delivery was set, Exim crashed when
3892 bouncing a message because it had too many Received: header lines.
3894 20. If two routers both had headers_remove settings, and the first one included
3895 a superfluous trailing colon, the final name in the first list and the
3896 first name in the second list were incorrectly joined into one item (with a
3897 colon in the middle).
3903 1. Added -C and -D options to the exinext utility, mainly to make it easier
3904 to include in the automated testing, but these could be helpful when
3905 multiple configurations are in use.
3907 2. The exinext utility was not formatting the output nicely when there was
3908 an alternate port involved in the retry record key, nor when there was a
3909 message id as well (for retries that were specific to a specific message
3910 and a specific host). It was also confused by IPv6 addresses, because of
3911 the additional colons they contain. I have fixed the IPv4 problem, and
3912 patched it up to do a reasonable job for IPv6.
3914 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3915 delivery, the log line now contains "pipelined" if PIPELINING was used.
3917 4. An SMTP transport process used to panic and die if the bind() call to set
3918 an explicit outgoing interface failed. This has been changed; it is now
3919 treated in the same way as a connect() failure.
3921 5. A reference to $sender_host_name in the part of a conditional expansion
3922 that was being skipped was still causing a DNS lookup. This no longer
3925 6. The def: expansion condition was not recognizing references to header lines
3926 that used bh_ and bheader_.
3928 7. Added the _cache feature to named lists.
3930 8. The code for checking quota_filecount in the appendfile transport was
3931 allowing one more file than it should have been.
3933 9. For compatibility with Sendmail, the command line option
3941 and sets the incoming protocol and host name (for trusted callers). The
3942 host name and its colon can be omitted when only the protocol is to be set.
3943 Note the Exim already has two private options, -pd and -ps, that refer to
3944 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3945 "s", but I don't think that's a major issue.
3947 10. A number of refactoring changes to the code, none of which should affect
3950 (a) The number of logging options was getting close to filling up the
3951 32-bit word that was used as a bit map. I have split them into two classes:
3952 those that are passed in the argument to log_write(), and those that are
3953 only ever tested independently outside of that function. These are now in
3954 separate 32-bit words, so there is plenty of room for expansion again.
3955 There is no change in the user interface or the logging behaviour.
3957 (b) When building, for example, log lines, the code previously used a
3958 macro that called string_cat() twice, in order to add two strings. This is
3959 not really sufficiently general. Furthermore, there was one instance where
3960 it was actually wrong because one of the argument was used twice, and in
3961 one call a function was used. (As it happened, calling the function twice
3962 did not affect the overall behaviour.) The macro has been replaced by a
3963 function that can join an arbitrary number of extra strings onto a growing
3966 (c) The code for expansion conditions now uses a table and a binary chop
3967 instead of a serial search (which was left over from when there were very
3968 few conditions). Also, it now recognizes conditions like "pam" even when
3969 the relevant support is not compiled in: a suitably worded error message is
3970 given if an attempt is made to use such a condition.
3972 11. Added ${time_interval:xxxxx}.
3974 12. A bug was causing one of the ddress fields not to be passed back correctly
3975 from remote delivery subprocesses. The field in question was not being
3976 subsequently used, so this caused to problems in practice.
3978 13. Added new log selectors queue_time and deliver_time.
3980 14. Might have fixed a bug in maildirsizefile handling that threw up
3981 "unexpected character" debug warnings, and recalculated the data
3982 unnecessarily. In any case, I expanded the warning message to give more
3985 15. Added the message "Restricted characters in address" to the statements in
3986 the default ACL that block characters like @ and % in local parts.
3988 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3989 Three changes have been made:
3991 (a) There was a serious bug; a negative response to MAIL caused the whole
3992 recipient domain to be cached as invalid, thereby blocking all messages
3993 to all local parts at the same domain, from all senders. This bug has
3994 been fixed. The domain is no longer cached after a negative response to
3995 MAIL if the sender used is not empty.
3997 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4000 (c) A new callout option, "use_sender" has been added for people who want
4001 the modified behaviour.
4007 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4010 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4011 indeed breaks things for older releases.
4013 3. Added additional logging to the case where there is a problem reading data
4014 from a filter that is running in a subprocess using a pipe, in order to
4015 try to track down a specific problem.
4017 4. Testing facility fudge: when running in the test harness and attempting
4018 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4019 getting "No route to host". Convert this to a timeout.
4021 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4024 6. Some OS don't have socklen_t but use size_t instead. This affects the
4025 fifth argument of getsockopt() amongst other things. This is now
4026 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4027 can be set for individual OS. I have set it for SunOS5, OSF1, and
4028 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4029 some earlier ones do not.
4031 7. Change 4.30/15 was not doing the test caselessly.
4033 8. The standard form for an IPv6 address literal was being rejected by address
4034 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4035 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4036 this, as well as the form without the "IPv6" on the front (but only when
4037 address literals are enabled, of course).
4039 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4041 10. Exim crashed if a message with an empty sender address specified by -f
4042 encountered a router with an errors_to setting. This could be provoked only
4043 by a command such as
4047 where an empty string was supplied; "<>" did not hit this bug.
4049 11. Installed PCRE release 4.5.
4051 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4052 remained set. It is now erased.
4054 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4055 times from message ids (which are base 36 rather than the normal 62).
4057 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4058 were being counted as actual protocol errors, and logged if the log
4059 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4060 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4061 and DATA following a set of rejected RCPTs do not count as protocol errors.
4062 In other words, Exim assumes they were pipelined, though this may not
4063 actually be the case. Of course, in all cases the client gets an
4064 appropriate error code.
4066 15. If a lookup fails in an ACL condition, a message about the failure may
4067 be available; it is used if testing the ACL cannot continue, because most
4068 such messages specify what the cause of the deferral is. However, some
4069 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4070 that caused an old message to be retained and used if a later statement
4071 caused a defer, replacing the real cause of the deferral.
4073 16. If an IP address had so many PTR records that the DNS lookup buffer
4074 was not large enough to hold them, Exim could crash while trying to process
4075 the truncated data. It now detects and logs this case.
4077 17. Further to 4.21/58, another change has been made: if (and only if) the
4078 first line of a message (the first header line) ends with CRLF, a bare LF
4079 in a subsequent header line has a space inserted after it, so as not to
4080 terminate the header.
4082 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4083 unnecessarily, used atoi() instead of strtol(), and didn't check the
4084 termination when getting file sizes from file names by regex.
4086 19. Completely re-implemented the support for maildirsize files, in the light
4087 of a number of problems with the previous contributed implementation
4088 (4.30/29). In particular:
4090 . If the quota is zero, the maildirsize file is maintained, but no quota is
4093 . If the maildir directory does not exist, it is created before any attempt
4094 to write a maildirsize file.
4096 . The quota value in the file is just a cache; if the quota is changed in
4097 the transport, the new value overrides.
4099 . A regular expression is available for excluding directories from the
4102 20. The autoreply transport checks the characters in options that define the
4103 message's headers; it allows continued headers, but it was checking with
4104 isspace() after an embedded newline instead of explicitly looking for a
4107 21. If all the "regular" hosts to which an address was routed had passed their
4108 expiry times, and had not reached their retry times, the address was
4109 bounced, even if fallback hosts were defined. Now Exim should go on to try
4112 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4113 equivalent code in the SMTP transport. Some hosts send humungous responses
4114 to HELO/EHLO, more than 1024 it seems.
4116 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4117 gives compiler warnings in some environments. I've now done it "properly",
4120 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4121 (because of problems with the built-in one) was declared to return uschar *
4122 instead of char *, causing compiler failure.
4124 25. Fixed a file descriptor leak when processing alias/forward files.
4126 26. Fixed a minor format string issue in dbfn.c.
4128 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4130 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4131 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4134 29. When a sender address is verified, it is cached, to save repeating the test
4135 when there is more than one recipient in a message. However, when the
4136 verification involves a callout, it is possible for different callout
4137 options to be set for different recipients. It is too complicated to keep
4138 track of this in the cache, so now Exim always runs a verification when a
4139 callout is required, relying on the callout cache for the optimization.
4140 The overhead is duplication of the address routing, but this should not be
4143 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4144 to be verified with callout=postmaster, and the main callout worked but the
4145 postmaster check failed, the verification correctly failed. However, if a
4146 subsequent RCPT command asked for sender verification *without* the
4147 postmaster check, incorrect caching caused this verification also to fail,
4150 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4151 it was not caching the DNS options (qualify_single, search_parents) that
4152 were used when the lookup failed. A subsequent lookup with different
4153 options therefore always gave the same answer, though there were cases
4154 where it should not have. (Example: a "domains = !$mx_any" option on a
4155 dnslookup router: the "domains" option is always processed without any
4156 widening, but the router might have qualify_single set.) Now Exim uses the
4157 cached value only when the same options are set.
4159 32. Added John Jetmore's "exipick" utility to the distribution.
4161 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4162 than a timeout (e.g. a certificate is required, and is not provided), an
4163 Exim server now closes the connection immediately. Previously it waited for
4164 the client to close - but if the client is SSL, it seems that they each
4165 wait for each other, leading to a delay before one of them times out.
4167 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4168 maintained 0.8.x compatibility because I don't think many are using it, and
4169 it is clearly obsolete.
4171 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4174 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4175 client certificate was expired. A simple patch fixes this, though I don't
4176 understand the full logic of why the verify callback is called multiple
4179 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4180 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4181 which causes problems with some clients (such as the Certicom SSL Plus
4182 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4183 disables the coutermeasure allowing Eudora to connect."
4185 38. Exim was not checking that a write() to a log file succeeded. This could
4186 lead to Bad Things if a log got too big, in particular if it hit a file
4187 size limit. Exim now panics and dies if it cannot write to a log file, just
4188 as it does if it cannot open a log file.
4190 39. Modified OS/Makefile-Linux so that it now contains
4192 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4194 The two -D definitions ensure that Exim is compiled with large file
4195 support, which makes it possible to handle log files that are bigger than
4198 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4199 instance) a domain was checked against a named list that involved a lookup,
4200 causing $domain_data to be set, then another domain was checked against the
4201 same list, then the first domain was re-checked, the value of $domain_data
4202 after the final check could be wrong. In particular, if the second check
4203 failed, it could be set empty. This bug probably also applied to
4206 41. The strip_trailing_dot option was not being applied to the address given
4207 with the -f command-line option.
4209 42. The code for reading a message's header from the spool was incrementing
4210 $received_count, but never initializing it. This meant that the value was
4211 incorrect (doubled) while delivering a message in the same process in which
4212 it was received. In the most common configuration of Exim, this never
4213 happens - a fresh exec is done - but it can happen when
4214 deliver_drop_privilege is set.
4216 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4217 it now includes up to 150 characters of the unexpected data in the log
4220 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4221 and building data strings. The size of both of these buffers was 10 000
4222 bytes - far larger than anybody would *ever* want, thought I. Needless to
4223 say, somebody hit the limit. I have increased the maximum line length to
4224 20 000 and the maximum data length of concatenated lines to 100 000. I have
4225 also fixed two bugs, because there was no checking on these buffers. Tsk,
4226 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4227 buffer is too small.
4229 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4230 lsearch lookups. Now it does.
4232 46. When parsing a route_list item in a manualroute router, a fixed-length
4233 buffer was used for the list of hosts. I made this 1024 bytes long,
4234 thinking that nobody would ever have a list of hosts that long. Wrong.
4235 Somebody had a whole pile of complicated expansion conditions, and the
4236 string was silently truncated, leading to an expansion error. It turns out
4237 that it is easier to change to an unlimited length (owing to other changes
4238 that have happened since this code was originally written) than to build
4239 structure for giving a limitation error. The length of the item that
4240 expands into the list of hosts is now unlimited.
4242 47. The lsearch lookup could not handle data where the length of text line was
4243 more than 4095 characters. Such lines were truncated, leading to shortened
4244 data being returned. It should now handle lines of any length.
4246 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4247 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4250 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4251 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4252 no longer happens in comment lines. A list of replacements is now placed
4253 at the head of all of the source files, except those whose only change is
4254 to replace PERL_COMMAND in the very first #! line.
4256 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4257 messages on the queue, with a bottom-up merge sort, using code contributed
4258 by Michael Haardt. This should make operations like -bp somewhat faster on
4259 large queues. It won't affect queue runners, except when queue_run_in_order
4262 51. Installed eximstats 1.31 in the distribution.
4264 52. Added support for SRV lookups to the dnslookup router.
4266 53. If an ACL referred to $message_body or $message_body_end, the value was not
4267 reset for any messages that followed in the same SMTP session.
4269 54. The store-handling optimization for building very long strings was not
4270 differentiating between the different store pools. I don't think this
4271 actually made any difference in practice, but I've tidied it.
4273 55. While running the routers to verify a sender address, $sender_address
4274 was still set to the sender address. This is wrong, because when routing to
4275 send a bounce to the sender, it would be empty. Therefore, I have changed
4276 it so that, while verifying a sender address, $sender_address is set to <>.
4277 (There is no change to what happens when verifying a recipient address.)
4279 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4280 target A or AAAA records (if not already returned) without resetting the
4281 qualify_single or search_parents options of the DNS resolver. These are
4282 inappropriate in this case because the targets of MX and SRV records must
4283 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4284 target that, when qualified, matched something in the local domain. These
4285 two options are now turned off when doing these lookups.
4287 57. It seems that at least some releases of Reiserfs (which does not have the
4288 concept of a fixed number of inodes) returns zero and not -1 for the
4289 number of available inodes. This interacted badly with check_spool_inodes,
4290 which assumed that -1 was the "no such thing" setting. What I have done is
4291 to check that the total number of inodes is greater than zero before doing
4292 the test of how many are available.
4294 58. When a "warn" ACL statement has a log_message modifier, the message is
4295 remembered, and not repeated. This is to avoid a lot of repetition when a
4296 message has many recipients that cause the same warning to be written.
4297 Howewer, Exim was preserving the list of already written lines for an
4298 entire SMTP session, which doesn't seem right. The memory is now reset if a
4299 new message is started.
4301 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4302 debugging output unless log_rewrite was also set.
4304 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4305 of (int)(handle) when we know that handle contains (void *)(-1).
4307 61. The Exim daemon panic-logs an error return when it closes the incoming
4308 connection. However "connection reset by peer" seems to be common, and
4309 isn't really an error worthy of noting specially, so that particular error
4312 62. When Exim is trying to find all the local interfaces, it used to panic and
4313 die if the ioctl to get the interface flags failed. However, it seems that
4314 on at least one OS (Solaris 9) it is possible to have an interface that is
4315 included in the list of interfaces, but for which you get a failure error
4316 for this call. This happens when the interface is not "plumbed" into a
4317 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4318 failure of the "get flags" call assumes that the interface is down.
4320 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4321 makes life easier for people who are doing arithmetic on fields extracted
4322 from dates, where you often get leading zeros that should not be
4323 interpreted as octal.
4325 64. Added qualify_domain to the redirect router, to override the global
4328 65. If a pathologically long header line contained very many addresses (the
4329 report of this problem mentioned 10 000) and each of them was rewritten,
4330 Exim could use up a very large amount of memory. (It kept on making new
4331 copies of the header line as it rewrote, and never released the old ones.)
4332 At the expense of a bit more processing, the header rewriting function has
4333 been changed so that it no longer eats memory in this way.
4335 66. The generation of the Received: header has been moved from the time that a
4336 message starts to be received, to the time that it finishes. The timestamp
4337 in the Received: header should now be very close to that of the <= log
4338 line. There are two side-effects of this change:
4340 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4341 logged header lines no longer include the local Received: line, because
4342 it has not yet been created. The same applies to a copy of the message
4343 that is returned to a non-SMTP sender when a message is rejected.
4345 (b) When a filter file is tested using -bf, no additional Received: header
4346 is added to the test message. After some thought, I decided that this
4349 This change does not affect the value of $received_for. It is still set
4350 after address rewriting, but before local_scan() is called.
4352 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4354 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4355 gave an unhelpful panic error message, and a defer error. I have managed to
4356 change this behaviour so that it now rejects any supplied certificate,
4357 which seems right, as the list of acceptable certificates is empty.
4359 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4360 gave an unhelpful defer error. I have not managed to make this reject any
4361 supplied certificates, but the error message it gives is "no certificate
4362 supplied", which is not helpful.
4364 70. exigrep's output now also includes lines that are not associated with any
4365 message, but which match the given pattern. Implemented by a patch from
4366 Martin Sluka, which also tidied up the Perl a bit.
4368 71. Recipient callout verification, like sender verification, was using <> in
4369 the MAIL FROM command. This isn't really the right thing, since the actual
4370 sender may affect whether the remote host accepts the recipient or not. I
4371 have changed it to use the actual sender in the callout; this means that
4372 the cache record is now keyed on a recipient/sender pair, not just the
4373 recipient address. There doesn't seem to be a real danger of callout loops,
4374 since a callout by the remote host to check the sender would use <>.
4375 [SEE ABOVE: changed after hitting problems.]
4377 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4378 temporary errors. However, in the case of such a code being given after
4379 the end of a data transmission (i.e. after ".") Exim was failing to write
4380 a retry record for the message. (Yes, there was some broken host that was
4381 actually sending 8xx at this point.)
4383 73. An unknown lookup type in a host list could cause Exim to panic-die when
4384 the list was checked. (An example that provoked this was putting <; in the
4385 middle of a list instead of at the start.) If this happened during a DATA
4386 ACL check, a -D file could be left lying around. This kind of configuration
4387 error no longer causes Exim to die; instead it causes a defer errror. The
4388 incident is still logged to the main and panic logs.
4390 74. Buglet left over from Exim 3 conversion. The message "too many messages
4391 in one connection" was written to the rejectlog but not the mainlog, except
4392 when address rewriting (yes!) was being logged.
4394 75. Added write_rejectlog option.
4396 76. When a system filter was run not as root (that is, when system_filter_user
4397 was set), the values of the $n variables were not being returned to the
4398 main process; thus, they were not subsequently available in the $sn
4401 77. Added +return_path_on_delivery log selector.
4403 78. A connection timeout was being treated differently from recipients deferred
4404 when testing hosts_max_try with a message that was older than the host's
4405 retry timeout. (The host should not be counted, thus allowing all hosts to
4406 be tried at least once before bouncing.) This may have been the cause of an
4407 occasionally reported bug whereby a message would remain on the queue
4408 longer than the retry timeout, but would be bounced if a delivery was
4409 forced. I say "may" because I never totally pinned down the problem;
4410 setting up timeout/retry tests is difficult. See also the next item.
4412 79. The ultimate address timeout was not being applied to errors that involved
4413 a combination of host plus message (for example, a timeout on a MAIL
4414 command). When an address resolved to a number of possible hosts, and they
4415 were not all tried for each delivery (e.g. because of hosts_max_try), a
4416 message could remain on the queue longer than the retry timeout.
4418 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4421 81. Fixed an obscure SMTP outgoing bug which required at least the following
4422 conditions: (a) there was another message waiting for the same server;
4423 (b) the server returned 5xx to all RCPT commands in the first message so
4424 that the message was not completed; (c) the server dropped the connection
4425 or gave a negative response to the RSET that Exim sends to abort the
4426 transaction. The observed case was a dropped connection after DATA that had
4427 been sent in pipelining mode. That is, the server had advertised PIPELINING
4428 but was not implementing it correctly. The effect of the bug was incorrect
4429 behaviour, such as trying another host, and this could lead to a crash.
4435 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4436 and daemon.c were passed as pointers to ints; they should have been
4437 pointers to socklen_t variables (which are typically unsigned ints).
4439 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4442 3. Fixed a really odd bug that affected only the testing scheme; patching a
4443 certain fixed string in the binary changed the value of another string that
4444 happened to be identical to the end of the original first string.
4446 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4447 name", it returns that address as the IP address. On some operating
4448 systems (e.g. Solaris), it also passes back the IP address string as the
4449 "host name". However, on others (e.g. Linux), it passes back an empty
4450 string. Exim wasn't checking for this, and was changing the host name to an
4451 empty string, assuming it had been canonicized.
4453 5. Although rare, it is permitted to have more than one PTR record for a given
4454 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4455 all the names associated with an address, because they do in Solaris.
4456 However, it seems that they do not in Linux for data that comes from the
4457 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4458 I found this out when I moved to a new Linux workstation and tried to run
4459 the Exim test suite.
4461 To get round this problem I have changed the code so that it now does its
4462 own call to the DNS to look up PTR records when searching for a host name.
4463 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4464 addresses that are only in /etc/hosts are still found.
4466 This behaviour is, however, controlled by an option called host_lookup_
4467 order, which defaults to "bydns:byaddr". If people want to use the other
4468 order, or indeed, just use one or the other means of lookup, they can
4469 specify it in this variable.
4471 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4472 some operating systems, this comes back from gethostbyaddr() as an empty
4473 string, and this is what Exim used to test for. However, it seems that in
4474 other systems, "." is yielded. Exim now tests for this case too.
4476 7. The values of check_spool_space and check_log_space are now held internally
4477 as a number of kilobytes instead of an absolute number of bytes. If a
4478 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4479 kilobyte. This means that much larger values can be stored.
4481 8. Exim monitor: an attempt to get the action menu when not actually pointing
4482 at a message produces an empty menu entitled "No message selected". This
4483 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4484 no entries in it ("Shell widget menu has zero width and/or height"). So I
4485 have added a single, blank menu entry in this case.
4487 9. Added ${quote_local_part.
4489 10. MIME decoding is now applied to the contents of Subject: header lines when
4492 11. Now that a reference to $sender_host_address automatically causes a reverse
4493 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4494 host lookup before query-style lookups in lists that might use this
4495 variable. This has therefore been abolished, and the "net-" prefix is no
4496 longer necessary for query-style lookups.
4498 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4499 have been a typo for LFLAGS, so it has been changed.
4501 13. The install script calls Exim with "-C /dev/null" in order to find the
4502 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4503 to be output. Howeve, since Exim outputs its version number before the
4504 error, it didn't break the script. It just looked ugly. I fixed this by
4505 always allowing "-C /dev/null" if the caller is root.
4507 14. Ignore overlarge ACL variable number when reading spool file - insurance
4508 against a later release with more variables having written the file.
4510 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4511 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4512 this, as well as the form without the "IPv6" on the front.
4514 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4515 OS/Makefile-Darwin file.
4517 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4518 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4520 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4521 variable. However, some OS use ints for inodes. I've added cast to long int
4522 to get rid of the compiler warning.
4524 19. I had forgotten to lock out "/../" in configuration file names when
4525 ALT_CONFIG_PREFIX was set.
4527 20. Routers used for verification do not need to specify transports. However,
4528 if such a router generated a host list, and callout was configured, Exim
4529 crashed, because it could not find a port number from the (non-existent)
4530 transport. It now assumes port 25 in this circumstance.
4532 21. Added the -t option to exigrep.
4534 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4535 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4536 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4537 them is set, LOOKUP_LSEARCH is forced.
4539 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4541 24. Added sender and host information to the "rejected by local_scan()" log
4542 line; previously there was no indication of these.
4544 25. Added .include_if_exists.
4546 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4547 Linux. It turns out that not all file systems support this. Apparently some
4548 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4549 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4550 not supported on the file descriptor, is now ignored when Exim is trying to
4551 sync a directory. This applies only to Linux.
4553 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4555 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4556 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4559 29. Added support for maildirsize files from supplied patch (modified a bit).
4561 30. The use of :fail: followed by an empty string could lead Exim to respond to
4562 sender verification failures with (e.g.):
4564 550 Verification failed for <xxx>
4565 550 Sender verify failed
4567 where the first response line was missing the '-' that indicates it is not
4568 the final line of the response.
4570 31. The loop for finding the name of the user that called Exim had a hardwired
4571 limit of 10; it now uses the value of finduser_retries, which is used for
4572 all other user lookups.
4574 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4577 33. Exim was neglecting to zero errno before one call of strtol() when
4578 expanding a string and expecting an integer value. On some systems this
4579 resulted in spurious "integer overflow" errors. Also, it was casting the
4580 result into an int without checking.
4582 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4583 did not work. The code looks as if it has *never* worked, though it appears
4584 to have been documented since at least releast 1.62. I have made it work.
4586 35. The "timeout_DNS" error in retry rules, also documented since at least
4587 1.62, also never worked. As it isn't clear exactly what this means, and
4588 clearly it isn't a major issue, I have abolished the feature by treating it
4589 as "timeout", and writing a warning to the main and panic logs.
4591 36. The display of retry rules for -brt wasn't always showing the error code
4594 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4595 timeout_connect_A, timeout_connect_MX.
4597 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4598 to the empty sender.
4600 39. The daemon was not analysing the content of -oX till after it had closed
4601 stderr and disconnected from the controlling terminal. This meant that any
4602 syntax errors were only noted on the panic log, and the return code from
4603 the command was 0. By re-arranging the code a little, I've made the
4604 decoding happen first, so such errors now appear on stderr, and the return
4605 code is 1. However, the actual setting up of the sockets still happens in
4606 the disconnected process, so errors there are still only recorded on the
4609 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4610 connections (as happens on some IP stacks) was logged at start up time as
4611 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4612 it from "IPv6 and IPv4", which means that two separate sockets are being
4615 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4616 says whether AF_INET or AF_INET6 was passed as an argument.
4618 42. Exiwhat output was messed up when time zones were included in log
4621 43. Exiwhat now gives more information about the daemon's listening ports,
4622 and whether -tls-on-connect was used.
4624 44. The "port" option of the smtp transport is now expanded.
4626 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4627 silently ignored. Now an error message is written to the main and panic
4630 46. There's a new ACL modifier called "logwrite" which writes to a log file
4631 as soon as it is encountered.
4633 47. Added $local_user_uid and $local_user_gid at routing time.
4635 48. Exim crashed when trying to verify a sender address that was being
4638 49. Exim was recognizing only a space character after ".include". It now also
4639 recognizes a tab character.
4641 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4642 extracting the relevant information from the specification. The man page no
4643 longer contains scrambled data for the -d option, and I've added a section
4644 at the front about calling Exim under different names.
4646 51. Added "extra_headers" argument to the "mail" command in filter files.
4648 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4651 53. Installed eximstats 1.29.
4653 54. Added transport_filter_timeout as a generic transport option.
4655 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4656 Cc: header lines. This was required by RFC 822, but it not required by RFC
4659 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4660 incoming messages that did not have them. Now it does so only if the
4661 message originates locally, that is, if there is no associated remote host
4662 address. When Resent- header lines are present, this applies to the Resent-
4663 lines rather than the non-Resent- lines.
4665 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4666 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4668 58. Messages for configuration errors now include the name of the main
4669 configuration file - useful now that there may be more than one file in a
4670 list (.included file names were always shown).
4672 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4673 for those rare installations that do not start the daemon as root or run it
4674 setuid root. I've cut out the call to initgroups() if the daemon is not
4677 60. The Exim user and group can now be bound into the binary as text strings
4678 that are looked up at the start of Exim's processing.
4680 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4682 62. Added $mailstore_basename variable.
4684 63. Installed patch to sieve.c from Michael Haardt.
4686 64. When Exim failed to open the panic log after failing to open the main log,
4687 the original message it was trying to log was written to stderr and debug
4688 output, but if they were not available (the usual case in production), it
4689 was lost. Now it is written to syslog before the two lines that record the
4690 failures to open the logs.
4692 65. Users' Exim filters run in subprocesses under the user's uid. It is
4693 possible for a "deliver" command or an alias in a "personal" command to
4694 provoke an address rewrite. If logging of address rewriting is configured,
4695 this fails because the process is not running as root or exim. There may be
4696 a better way of dealing with this, but for the moment (because 4.30 needs
4697 to be released), I have disabled address rewrite logging when running a
4698 filter in a non-root, non-exim process.
4704 1. The buildconfig auxiliary program wasn't quoting the value set for
4705 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4706 not defined. This bug was masked in 4.22 by the effect that was fixed in
4709 2. Some messages that were rejected after a message id was allocated were
4710 shown as "incomplete" by exigrep. It no longer does this for messages that
4711 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4713 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4714 have allow_domain_literals set, the ID did not get logged in the <= line.
4715 Domain literals are now always recognized in Message-ID: header lines.
4717 4. The first argument for a ${extract expansion item is the key name or field
4718 number. Leading and trailing spaces in this item were not being ignored,
4719 causing some misleading effects.
4721 5. When deliver_drop_privilege was set, single queue runner processes started
4722 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4723 same command in the process it spins off) were not dropping privilege.
4725 6. When the daemon running as "exim" started a queue runner, it always
4726 re-executed Exim in the spun-off process. This is a waste of effort when
4727 deliver_drop_privilege is set. The new process now just calls the
4728 queue-runner function directly.
4734 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4737 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4738 ignored. Though the use of -oP was forcing the writing of a pid file, it
4739 was always written to the default place.
4741 3. If the message "no IP address found for host xxxx" is generated during
4742 incoming verification, it is now followed by identification of the incoming
4743 connection (so you can more easily find what provoked it).
4745 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4747 5. Added some features to "harden" Exim a bit more against certain attacks:
4749 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4750 be put in Local/Makefile. This is like the never_users runtime option,
4751 but it cannot be overridden. The default setting is "root".
4753 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4754 prefix string with which any file named in a -C command line option
4757 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4758 is retained for -C and -D only if the caller of Exim is root. Without
4759 it, the exim user may also use -C and -D and retain privilege.
4761 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4762 command line option is disabled.
4764 6. Macro names set by the -D option must start with an upper case letter, just
4765 like macro names defined in the configuration file.
4767 7. Added "dereference=" facility to LDAP.
4769 8. Two instances of the typo "uknown" in the source files are fixed.
4771 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4772 the Configure-Makefile script screwed up while processing it.
4774 10. Incorporated PCRE 4.4.
4776 11. The SMTP synchronization check was not operating right at the start of an
4777 SMTP session. For example, it could not catch a HELO sent before the client
4778 waited for the greeting. There is now a check for outstanding input at the
4779 point when the greeting is written. Because of the duplex, asynchronous
4780 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4781 way, but not yet received, when the check is performed.
4783 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4784 on TCP/IP sockets, because this apparently causes some broken clients to
4787 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4788 unchanged) from the Cygwin maintainer.
4790 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4791 was supported instead of testing for mbx. Effectively a typo.
4793 15. The spa authenticator server code was not checking that the input it
4794 received was valid base64.
4796 16. The debug output line for the "set" modifier in ACLs was not showing the
4797 name of the variable that was being set.
4799 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4801 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4802 lookup on its own. Something else was needed to trigger the lookup. For
4803 example, a match in host_lookup or the need for a host name in a host list.
4804 Now, if $sender_host_name is referenced and the host name has not yet been
4805 looked up, a lookup is performed. If the lookup fails, the variable remains
4806 empty, and $host_lookup_failed is set to "1".
4808 19. Added "eqi" as a case-independent comparison operator.
4810 20. The saslauthd authentication condition could segfault if neither service
4811 nor realm was specified.
4813 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4814 error message that was logged was misleading, and incoming SMTP
4815 connections were dropped. The message is now more accurate, and temporary
4816 errors are given to SMTP connections.
4818 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4819 (except RSET) with a 421 error, until QUIT is received. However, it was
4820 failing to send a response to QUIT.
4822 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4823 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4824 ACL is now run after the helo_try_verify_hosts code.
4826 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4827 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4828 case-independent, so other case variants are also recognized). Apparently
4829 some systems use these upper case variants.
4831 25. If more than two messages were waiting for the same host, and a transport
4832 filter was specified for the transport, Exim sent two messages over the
4833 same TCP/IP connection, and then failed with "socket operation on non-
4834 socket" when it tried to send the third.
4836 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4838 27. The extern definition of crypt16() in expand.c was not being excluded when
4839 the OS had its own crypt16() function.
4841 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4842 as a preferred synonym for return_size_limit, both as an option and as an
4845 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4847 30. Changed the default configuration ACL to relax the local part checking rule
4848 for addresses that are not in any local domains. For these addresses,
4849 slashes and pipe symbols are allowed within local parts, but the sequence
4850 /../ is explicitly forbidden.
4852 31. SPA server authentication was not clearing the challenge buffer before
4855 32. log_message in a "warn" ACL statement was writing to the reject log as
4856 well as to the main log, which contradicts the documentation and doesn't
4857 seem right (because no rejection is happening). So I have stopped it.
4859 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4860 However, I am unable to do any testing of this.
4862 34. Fixed an infelicity in the appendfile transport. When checking directories
4863 for a mailbox, to see if any needed to be created, it was accidentally
4864 using path names with one or more superfluous leading slashes; tracing
4865 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4867 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4868 contents are added to the log line that is written for every discarded
4869 recipient. (Previously a log_message setting was ignored.)
4871 36. The ${quote: operator now quotes the string if it is empty.
4873 37. The install script runs exim in order to find its version number. If for
4874 some reason other than non-existence or emptiness, which it checks, it
4875 could not run './exim', it was installing it with an empty version number,
4876 i.e. as "exim-". This error state is now caught, and the installation is
4879 38. An argument was missing from the function that creates an error message
4880 when Exim fails to connect to the socket for saslauthd authentication.
4881 This could cause Exim to crash, or give a corrupted message.
4883 39. Added isip, isip4, and isip6 to ${if conditions.
4885 40. The ACL variables $acl_xx are now saved with the message, and can be
4886 accessed later in routers, transports, and filters.
4888 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4889 strings in the file are not string-expanded.
4891 42. If a MAIL command specified a SIZE value that was too large to fit into an
4892 int variable, the check against message_size_limit failed. Such values are
4893 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4894 day this will have to be increased, but I don't think I want to be around
4895 when emails are that large.
4902 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4903 iconv() is not standard in FreeBSD.
4905 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4906 IPv6 enabled. The observed symptom was a segmentation fault on return from
4907 the function os_common_find_running_interfaces() in src/os.c.
4909 3. In the check_special_case() function in daemon.c I had used "errno" as an
4910 argument name, which causes warnings on some systems. This was basically a
4911 typo, since it was named "eno" in the comments!
4913 4. The code that waits for the clock to tick (at a resolution of some fraction
4914 of a second) so as to ensure message-id uniqueness was always waiting for
4915 at least one whole tick, when it could have waited for less. [This is
4916 almost certainly not relevant at current processor speeds, where it is
4917 unlikely to ever wait at all. But we try to future-proof.]
4919 5. The function that sleeps for a time interval that includes fractions of a
4920 second contained a race. It did not block SIGALRM between setting the
4921 timer, and suspending (a couple of lines later). If the interval was short
4922 and the sigsuspend() was delayed until after it had expired, the suspension
4923 never ended. On busy systems this could lead to processes getting stuck for
4926 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4927 process, before it forks any delivery processes. The open lookup caching
4928 mechanism meant that the open file or database connection was passed into
4929 the delivery process. The problem was that delivery processes always tidy
4930 up cached lookup data. This could cause a problem for the next delivery
4931 process started by the queue runner, because the external queue runner
4932 process does not know about the closure. So the next delivery process
4933 still has data in the lookup cache. In the case of a file lookup, there was
4934 no problem because closing a file descriptor in a subprocess doesn't affect
4935 the parent. However, if the lookup was caching a connection to a database,
4936 the connection was closed, and the second delivery process was likely to
4937 see errors such as "PGSQL: query failed: server closed the connection
4938 unexpectedly". The problem has been fixed by closing all cached lookups
4939 in a queue runner before running a delivery process.
4941 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4942 seem to have the "const" qualifier which it has on other OS. I've
4945 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4946 *of the same type* (client or server) with the same public name that an
4947 error should be diagnosed.
4949 9. When Exim looked up a host name for an IP address, but failed to find the
4950 original IP address when looking up the host name (a safety check), it
4951 output the message "<ip address> does not match any IP for NULL", which was
4952 confusing, to say the least. The bug was that the host name should have
4953 appeared instead of "NULL".
4955 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4956 user that is built into the binary, and the -C or -D options is used, root
4957 privilege is dropped before the configuration file is read. In addition,
4958 logging is switched to stderr instead of the normal log files. If the
4959 configuration then re-defines the Exim user, the unprivileged environment
4960 is probably not what is expected, so Exim logs a panic warning message (but
4963 However, if deliver_drop_privilege is set, the unprivileged state may well
4964 be exactly what is intended, so the warning has been cut out in that case,
4965 and Exim is allowed to try to write to its normal log files.
4971 1. smtp_return_error_details was not giving details for temporary sender
4972 or receiver verification errors.
4974 2. Diagnose a configuration error if two authenticators have the same public
4977 3. Exim used not to create the message log file for a message until the first
4978 delivery attempt. This could be confusing when incoming messages were held
4979 for policy or load reasons. The message log file is now created at the time
4980 the message is received, and an initial "Received" line is written to it.
4982 4. The automatically generated man page for command line options had a minor
4983 bug that caused no ill effects; however, a more serious problem was that
4984 the procedure for building the man page automatically didn't always
4985 operate. Consequently, release 4.20 contains an out-of-date version. This
4986 shouldn't happen again.
4988 5. When building Exim with embedded Perl support, the script that builds the
4989 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4990 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4992 6. The freeze_tell option was not being used for messages that were frozen on
4993 arrival, either by an ACL or by local_scan().
4995 7. Added the smtp_incomplete_transaction log selector.
4997 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4998 was accepting AUTH without a new EHLO.
5000 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5001 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5004 10. Logging of TCP/IP connections (when configured) now happens in the main
5005 daemon process instead of the child process, so that the TCP/IP connection
5006 count is more accurate (but it can never be perfect).
5008 11. The use of "drop" in a nested ACL was not being handled correctly in the
5009 outer ACL. Now, if condition failure induced by the nested "drop" causes
5010 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5011 or "require"), the connection is dropped.
5013 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5014 that yield "discard" can now be used with an "accept" or a "discard" verb,
5015 but an error is generated for any others (because I can't see a useful way
5016 to define what should happen).
5018 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5019 are now processed in the same way as lines in the Exim configuration file.
5020 In particular, continuation lines are supported.
5022 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5024 15. Added -ti meaning -t -i.
5026 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5027 domains, and warn by logging if others are found.
5029 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5030 returned from GIFCONF when Exim is trying to find the list of interfaces on
5031 a host. The code in os.c has been modified to copy each ifreq to an aligned
5032 structure in all cases.
5034 Also, in some cases, the returned ifreq's were being copied to a 'struct
5035 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5036 means the last couple of bytes of an IPv6 address could be chopped if the
5037 ifreq contained only a normal sockaddr (14 bytes storage).
5039 18. Named domain lists were not supported in the hosts_treat_as_local option.
5040 An entry such as +xxxx was not recognized, and was treated as a literal
5043 19. Ensure that header lines added by a DATA ACL are included in the reject log
5044 if the ACL subsequently rejects the message.
5046 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5047 MD5 (which is deprecated).
5049 21. When testing a filter file using -bf, Exim was writing a message when it
5050 took the sender from a "From " line in the message, but it was not doing so
5051 when it took $return_path from a Return-Path: header line. It now does.
5053 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5054 with a valid header line field name (a series of printing characters
5055 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5057 23. Changed "disc" in the source to "disk" to conform to the documentation and
5058 the book and for uniformity.
5060 24. Ignore Sendmail's -Ooption=value command line item.
5062 25. When execve() failed while trying to run a command in a pipe transport,
5063 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5064 could be confused with a return value of 69 from the command itself. This
5065 has been changed to 127, the value the shell returns if it is asked to run
5066 a non-existent command. The wording for the related log line suggests a
5067 non-existent command as the problem.
5069 26. If received_header_text expands to an empty string, do not add a Received:
5070 header line to the message. (Well, it adds a token one on the spool, but
5071 marks it "old" so that it doesn't get used or transmitted.)
5073 27. Installed eximstats 1.28 (addition of -nt option).
5075 28. There was no check for failure on the call to getsockname() in the daemon
5076 code. This can fail if there is a shortage of resources on the system, with
5077 ENOMEM, for example. A temporary error is now given on failure.
5079 29. Contrary to the C standard, it seems that in some environments, the
5080 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5081 program. Exim now does this explicitly; it affects the formatting of
5082 timestamps using strftime().
5084 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5085 complaints. I've now initialized all the variables, to avoid this.
5087 32. Header lines added by a system filter were not being "seen" during
5088 transport-time rewrites.
5090 33. The info_callback() function passed to OpenSSL is set up with type void
5091 (*)(SSL *, int, int), as described somewhere. However, when calling the
5092 function (actually a macro) that sets it up, the type void(*)() is
5093 expected. I've put in a cast to prevent warnings from picky compilers.
5095 34. If a DNS black list lookup found a CNAME record, but there were no A
5096 records associated with the domain it pointed at, Exim crashed.
5098 35. If a DNS black list lookup returned more than one A record, Exim ignored
5099 all but the first. It now scans all returned addresses if a particular IP
5100 value is being sought. In this situation, the contents of the
5101 $dnslist_value variable are a list of all the addresses, separated by a
5104 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5105 to accept a host name and all its aliases if the forward lookup for any of
5106 them yielded the IP address of the incoming connection. Now it accepts only
5107 those names whose forward lookup yields the correct IP address. Any other
5108 names are discarded. This closes a loophole whereby a rogue DNS
5109 administrator could create reverse DNS records to break through a
5110 wildcarded host restriction in an ACL.
5112 37. If a user filter or a system filter that ran in a subprocess used any of
5113 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5114 the wrong values were passed to the pipe command ($thisaddress had the
5115 value of $0, $0 had the value of $1, etc). This bug was introduced by
5116 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5118 38. Improved the line breaking for long SMTP error messages from ACLs.
5119 Previously, if there was no break point between 40 and 75 characters, Exim
5120 left the rest of the message alone. Two changes have been made: (a) I've
5121 reduced the minimum length to 35 characters; (b) if it can't find a break
5122 point between 35 and 75 characters, it looks ahead and uses the first one
5123 that it finds. This may give the occasional overlong line, but at least the
5124 remaining text gets split now.
5126 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5127 file descriptors might be low, and that setting 1000 would always raise it.
5128 It turns out that in some environments, the limit is already over 1000 and
5129 that lowering it causes trouble. So now Exim takes care not to decrease it.
5131 40. When delivering a message, the value of $return_path is set to $sender_
5132 address at the start of routing (routers may change the value). By an
5133 oversight, this default was not being set up when an address was tested by
5134 -bt or -bv, which affected the outcome if any router or filter referred to
5137 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5138 log only when "message" or "log_message" are set. However, if one of the
5139 conditions was an address verification, or a call to a nested ACL, the
5140 messages generated by the underlying test were being passed through. This
5141 no longer happens. The underlying message is available in $acl_verify_
5142 message for both "message" and "log_message" expansions, so it can be
5143 passed through if needed.
5145 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5146 new expansion $bh_ to give the encoded byte string without charset
5147 translation. Translation happens only if iconv() is available; HAVE_ICONV
5148 indicates this at build time. HEADERS_CHARSET gives the charset to
5149 translate to; headers_charset can change it in the configuration, and
5150 "headers charset" can change it in an individual filter file.
5152 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5153 that creates RFC 2047 encoded "words" labels them as that charset instead
5154 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5155 expansion operator; (ii) when Exim creates a From: line for a local
5156 message; (iii) when a header line is rewritten to include a "phrase" part.
5158 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5159 buggy, causing it to skip the first lines of messages whose message ID
5160 ended in 'D'. This would not have bitten before Exim release 4.14, because
5161 message IDs were unlikely to end in 'D' before then. The effect was to have
5162 incorrect size information for certain domains.
5164 45. #include "config.h" was missing at the start of the crypt16.c module. This
5165 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5168 46. If there was a timeout during a "random" callout check, Exim treated it as
5169 a failure of the random address, and carried on sending RSET and the real
5170 address. If the delay was just some slowness somewhere, the response to the
5171 original RCPT would be taken as a response to RSET and so on, causing
5172 mayhem of various kinds.
5174 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5175 when I implemented it. It didn't allow for the fact that some option values
5176 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5177 the right test for positive values.
5179 48. Domain names in DNS records are case-independent. Exim always looks them up
5180 in lower case. Some resolvers return domain names in exactly the case they
5181 appear in the zone file, that is, they may contain uppercase letters. Not
5182 all resolvers do this - some return always lower case. Exim was treating a
5183 change of case by a resolver as a change of domain, similar to a widening
5184 of a domain abbreviation. This triggered its re-routing code and so it was
5185 trying to route what was effectively the same domain again. This normally
5186 caused routing to fail (because the router wouldn't handle the domain
5187 twice). Now Exim checks for this case specially, and just changes the
5188 casing of the domain that it ultimately uses when it transmits the message
5191 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5194 50. If a filter generated a file delivery with a non-absolute name (possible if
5195 no home directory exists for the router), the forbid_file option was not
5198 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5199 the existing equality matching.
5201 52. Exim was using ints instead of ino_t variables in some places where it was
5202 dealing with inode numbers.
5204 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5205 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5206 called TMPDIR, and if it finds it is different, it changes its value.
5208 54. The smtp_printf() function is now made available to local_scan() so
5209 additional output lines can be written before returning. There is also an
5210 smtp_fflush() function to enable the detection of a dropped connection.
5211 The variables smtp_input and smtp_batched_input are exported to
5214 55. Changed the default runtime configuration: the message "Unknown user"
5215 has been removed from the ACL, and instead placed on the localuser router,
5216 using the cannot_route_message feature. This means that any verification
5217 failures that generate their own messages won't get overridden. Similarly,
5218 the "Unrouteable address" message that was in the ACL for unverifiable
5219 relay addresses has also been removed.
5221 56. Added hosts_avoid_esmtp to the smtp transport.
5223 57. The exicyclog script was not checking for the esoteric option
5224 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5225 will work only if exicyclog is run under the appropriate euid.
5227 58. Following a discussion on the list, the rules by which Exim recognises line
5228 endings on incoming messages have been changed. The -dropcr and drop_cr
5229 options are now no-ops, retained only for backwards compatibility. The
5230 following line terminators are recognized: LF CRLF CR. However, special
5231 processing applies to CR:
5233 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5234 nor a local message in the state where . is a terminator.
5236 (ii) If a bare CR is encountered in a header line, an extra space is added
5237 after the line terminator so as not to end the header. The reasoning
5238 behind this is that bare CRs in header lines are most likely either
5239 to be mistakes, or people trying to play silly games.
5241 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5242 was being incorrectly given as 18 bytes larger than it should have been.
5243 This is a VOB (very old bug).
5245 60. This may never have affected anything current, but just in case it has:
5246 When the local host is found other than at the start of a list of hosts,
5247 the local host, those with the same MX, and any that follow, are discarded.
5248 When the list in question was part of a longer list of hosts, the following
5249 hosts (not currently being processed) were also being discarded. This no
5250 longer happens. I'm not sure if this situation could ever has previously
5253 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5256 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5257 header. This is something that is recommended in a new Internet Draft, and
5258 is something that is documented as being done by Sendmail. There are two
5259 possible values. For messages generated by the autoreply transport, Exim
5262 Auto-Submitted: auto-replied
5264 whereas for all other generated messages (e.g. bounces) it adds
5266 Auto-Submitted: auto-generated
5268 63. The "personal" condition in filters now includes a test for the
5269 Auto-Submitted: header. If it contains the string "auto-" the message it
5270 not considered personal.
5272 64. Added rcpt_include_affixes as a generic transport option.
5274 65. Added queue_only_override (default true).
5276 66. Added the syslog_duplication option.
5278 67. If what should have been the first header line of a message consisted of
5279 a space followed by a colon, Exim was mis-interpreting it as a header line.
5280 It isn't of course - it is syntactically invalid and should therefore be
5281 treated as the start of the message body. The misbehaviour could have
5282 caused a number of strange effects, including loss of data in subsequent
5283 header lines, and spool format errors.
5285 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5286 client host had authenticated. This control can now be exercised by an ACL
5287 for more flexibility.
5289 69. By default, callouts do not happen when testing with -bh. There is now a
5290 variant, -bhc, which does actually run the callout code, including
5291 consulting and updating the callout cache.
5293 70. Added support for saslauthd authentication, courtesy of Alexander
5296 71. If statvfs() failed on the spool or log directories while checking their
5297 size for availability, Exim confusingly gave the error "space shortage".
5298 Furthermore, in debugging mode it crashed with a floating point exception.
5299 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5300 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5301 serious problem, Exim now writes to the main and panic logs when this
5302 happens, with details of the failure. It then refuses to accept the
5303 incoming message, giving the message "spool directory problem" or "log
5304 directory problem" with a 421 code for SMTP messages.
5306 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5307 0, 1, and 2 exist, because some OS complain for execs without them (see
5308 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5309 descriptors. However, the code omitted to check that the open succeeded,
5310 causing mysterious errors if for some reason the permissions on /dev/null
5311 got screwed. Now Exim writes a message to the main and panic logs, and
5312 bombs out if it can't open /dev/null.
5314 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5315 interact so that it is all more flexible. It is supposed to remain
5316 backwards compatible. Also added extra_local_interfaces.
5318 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5319 to bomb out with an assertion failure - to the client this appears as a
5320 connection drop. This problem occurs in the part of the code that was taken
5321 from the Samba project. Fortunately, the assertion is in a very simple
5322 function, so I have fixed this by reproducing the function inline in the
5323 one place where it is called, and arranging for authentication to fail
5324 instead of killing the process with assert().
5326 75. The SPA client code was not working when the server requested OEM rather
5327 than Unicode encoding.
5329 76. Added code to make require_files with a specific uid setting more usable in
5330 the case where statting the file as root fails - usually a non-root-mounted
5331 NFS file system. When this happens and the failure is EACCES, Exim now
5332 forks a subprocess and does the per-uid checking as the relevant uid.
5334 77. Added process_log_path.
5336 78. If log_file_path was not explicitly set, a setting of check_log_space or
5337 check_log_inodes was ignored.
5339 79. If a space check for the spool or log partitions fails, the incident is now
5340 logged. Of course, in the latter case the data may get lost...
5342 80. Added the %p formatting code to string_format() so that it can be used to
5343 print addresses in debug_print(). Adjusted all the address printing in the
5344 debugging in store.c to use %p rather than %d.
5346 81. There was a concern that a line of code in smtp_in.c could overflow a
5347 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5348 initially expressed, the concern was not well-founded, because trailing
5349 spaces are removed early. However, if the trailing spaces were followed by
5350 a NULL, they did not get removed, so the overflow was possible. Two fixes
5353 (a) I re-wrote the offending code in a cleaner fashion.
5354 (b) If an incoming SMTP command contains a NULL character, it is rejected
5357 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5358 runs initgroups(), so that if the Exim user is in any additional groups,
5359 they will be used during message reception.
5365 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob