1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Handle short writes when writing local log-files.
8 In practice, only affects FreeBSD (8 onwards).
9 Bugzilla 1053, with thanks to Dmitry Isaikin.
11 NM/01 Bugzilla 949 - Documentation tweak
13 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
16 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
18 PP/02 Implemented gsasl authenticator.
20 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
22 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
23 `pkg-config foo` for cflags/libs.
25 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
26 with rest of GSASL and with heimdal_gssapi.
28 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
29 `pkg-config foo` for cflags/libs for the TLS implementation.
31 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
32 properties get this fed in as external SSF. A number of robustness
33 and debugging improvements to the cyrus_sasl authenticator.
35 PP/08 cyrus_sasl server now expands the server_realm option.
37 PP/09 Bugzilla 1214 - Log authentication information in reject log.
38 Patch by Jeremy Harris.
40 PP/10 Added dbmjz lookup type.
42 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
44 PP/12 MAIL args handles TAB as well as SP, for better interop with
45 non-compliant senders.
46 Analysis and variant patch by Todd Lyons.
48 NM/04 Bugzilla 1237 - fix cases where printf format usage no indicated
49 Bug report from Lars Müller <lars@samba.org> (via SUSE),
50 Patch from Dirk Mueller <dmueller@suse.com>
52 PP/13 tls_peerdn now print-escaped for spool files.
53 Observed some $tls_peerdn in wild which contained \n, which resulted
54 in spool file corruption.
56 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
57 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
58 or write after TLS renegotiation, which otherwise led to messages
61 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
62 as a tracking header (ie: a signed header comes before the signature).
63 Patch from Wolfgang Breyha.
65 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
66 comma-sep list; embedded commas doubled.
68 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
70 Report and patch from Dmitry Banschikov.
72 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
73 Removed SSL_clear() after SSL_new() which led to protocol negotiation
74 failures. We appear to now support TLS1.1+ with Exim.
76 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
77 lets Exim select keys and certificates based upon TLS SNI from client.
78 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
79 before an outbound SMTP session. New log_selector, +tls_sni.
81 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
82 NULL dereference. Report and patch from Alun Jones.
88 PP/01 Solaris build fix for Oracle's LDAP libraries.
89 Bugzilla 1109, patch from Stephen Usher.
91 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
93 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
96 TF/02 Fix a couple more cases where we did not log the error message
97 when unlink() failed. See also change 4.74-TF/03.
99 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
100 lock up or crash if it happened to be inside a call to libc when it
101 got a SIGUSR1 from exiwhat.
103 The SIGUSR1 handler appends the current process status to the process
104 log which is later printed by exiwhat. It used to use the general
105 purpose logging code to do this, but several functions it calls are
106 not safe for signals.
108 The new output code in the SIGUSR1 handler is specific to the process
109 log, and simple enough that it's easy to inspect for signal safety.
110 Removing some special cases also simplifies the general logging code.
111 Removing the spurious timestamps from the process log simplifies
114 TF/04 Improved ratelimit ACL condition.
116 The /noupdate option has been deprecated in favour of /readonly which
117 has clearer semantics. The /leaky, /strict, and /readonly update modes
118 are mutually exclusive. The update mode is no longer included in the
119 database key; it just determines when the database is updated. (This
120 means that when you upgrde Exim will forget old rate measurements.)
122 Exim now checks that the per_* options are used with an update mode that
123 makes sense for the current ACL. For example, when Exim is processing a
124 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
125 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
126 must specify per_mail/readonly. If you omit the update mode it defaults to
127 /leaky where that makes sense (as before) or /readonly where required.
129 The /noupdate option is now undocumented but still supported for
130 backwards compatibility. It is equivalent to /readonly except that in
131 ACLs where /readonly is required you may specify /leaky/noupdate or
132 /strict/noupdate which are treated the same as /readonly.
134 A useful new feature is the /count= option. This is a generalization
135 of the per_byte option, so that you can measure the throughput of other
136 aggregate values. For example, the per_byte option is now equivalent
137 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
139 The per_rcpt option has been generalized using the /count= mechanism
140 (though it's more complicated than the per_byte equivalence). When it is
141 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
142 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
143 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
144 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
145 Note that using per_rcpt with a non-readonly update mode in more than
146 one ACL will cause the recipients to be double-counted. (The per_mail
147 and per_byte options don't have this problem.)
149 The handling of very low rates has changed slightly. If the computed rate
150 is less than the event's count (usually one) then this event is the first
151 after a long gap. In this case the rate is set to the same as this event's
152 count, so that the first message of a spam run is counted properly.
154 The major new feature is a mechanism for counting the rate of unique
155 events. The new per_addr option counts the number of different
156 recipients that someone has sent messages to in the last time period. It
157 behaves like per_rcpt if all the recipient addresses are different, but
158 duplicate recipient addresses do not increase the measured rate. Like
159 the /count= option this is a general mechanism, so the per_addr option
160 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
161 example, measure the rate that a client uses different sender addresses
162 with the options per_mail/unique=$sender_address. There are further
163 details in the main documentation.
165 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
167 TF/06 Removed a few PCRE remnants.
169 TF/07 Automatically extract Exim's version number from tags in the git
170 repository when doing development or release builds.
172 PP/02 Raise smtp_cmd_buffer_size to 16kB.
173 Bugzilla 879. Patch from Paul Fisher.
175 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
176 Heavily based on revision 40f9a89a from Simon Arlott's tree.
179 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
181 PP/05 Variable $av_failed, true if the AV scanner deferred.
182 Bugzilla 1078. Patch from John Horne.
184 PP/06 Stop make process more reliably on build failure.
185 Bugzilla 1087. Patch from Heiko Schlittermann.
187 PP/07 Make maildir_use_size_file an _expandable_ boolean.
188 Bugzilla 1089. Patch from Heiko Schlittermann.
190 PP/08 Handle ${run} returning more data than OS pipe buffer size.
191 Bugzilla 1131. Patch from Holger Weiß.
193 PP/09 Handle IPv6 addresses with SPF.
194 Bugzilla 860. Patch from Wolfgang Breyha.
196 PP/10 GnuTLS: support TLS 1.2 & 1.1.
198 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
201 PP/11 match_* no longer expand right-hand-side by default.
202 New compile-time build option, EXPAND_LISTMATCH_RHS.
203 New expansion conditions, "inlist", "inlisti".
205 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
207 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
209 PP/14 fix log_write() format string regression from TF/03.
210 Bugzilla 1152. Patch from Dmitry Isaikin.
216 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
218 PP/02 Harmonised TLS library version reporting; only show if debugging.
219 Layout now matches that introduced for other libraries in 4.74 PP/03.
221 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
223 PP/04 New "dns_use_edns0" global option.
225 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
228 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
229 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
231 TK/01 Updated PolarSSL code to 0.14.2.
232 Bugzilla 1097. Patch from Andreas Metzler.
234 PP/07 Catch divide-by-zero in ${eval:...}.
237 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
240 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
241 format-string attack -- SECURITY: remote arbitrary code execution.
243 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
244 time unintentionally subject to list matching rules, letting the header
245 cause arbitrary Exim lookups (of items which can occur in lists, *not*
246 arbitrary string expansion). This allowed for information disclosure.
248 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
249 INT_MIN/-1 -- value coerced to INT_MAX.
255 NM/01 Workround for PCRE version dependency in version reporting
258 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
259 This fixes portability to compilers other than gcc, notably
260 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
262 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
263 makefiles for portability to HP-UX and POSIX correctness.
265 PP/01 Permit LOOKUP_foo enabling on the make command-line.
266 Also via indented variable definition in the Makefile.
267 (Debugging by Oliver Heesakkers).
269 PP/02 Restore caching of spamd results with expanded spamd_address.
270 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
272 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
273 Improves build reliability. Fix from: Frank Elsner
275 NM/02 Fix wide character breakage in the rfc2047 coding
276 Fixes bug 1064. Patch from Andrey N. Oktyabrski
278 NM/03 Allow underscore in dnslist lookups
279 Fixes bug 1026. Patch from Graeme Fowler
281 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
282 Code patches from Adam Ciarcinski of NetBSD.
284 NM/04 Fixed exiqgrep to cope with mailq missing size issue
287 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
288 is logged, to avoid truncation. Patch from John Horne.
290 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
291 Patch from Jakob Hirsch.
293 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
294 SQL string expansion failure details.
295 Patch from Andrey Oktyabrski.
297 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
298 Patch from Simon Arlott.
300 PP/09 New lookups functionality failed to compile on old gcc which rejects
301 extern declarations in function scope.
302 Patch from Oliver Fleischmann
304 PP/10 Use sig_atomic_t for flags set from signal handlers.
305 Check getgroups() return and improve debugging.
306 Fixed developed for diagnosis in bug 927 (which turned out to be
309 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
310 Patch from Mark Zealey.
312 PP/12 Bugzilla 1056: Improved spamd server selection.
313 Patch from Mark Zealey.
315 PP/13 Bugzilla 1086: Deal with maildir quota file races.
316 Based on patch from Heiko Schlittermann.
318 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
319 Patch from Uwe Doering, sign-off by Michael Haardt.
321 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
322 variable declaration deep within a block. Bug and patch from
325 PP/15 lookups-Makefile IRIX compatibilty coercion.
327 PP/16 Make DISABLE_DKIM build knob functional.
329 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
330 Patch by Simon Arlott
332 TF/03 Fix valgrind.h portability to C89 compilers that do not support
333 variable argument macros. Our copy now differs from upstream.
339 TF/01 Failure to get a lock on a hints database can have serious
340 consequences so log it to the panic log.
342 TF/02 Log LMTP confirmation messages in the same way as SMTP,
343 controlled using the smtp_confirmation log selector.
345 TF/03 Include the error message when we fail to unlink a spool file.
347 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
348 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
349 for maintaining out-of-tree patches for some time.
351 PP/01 Bugzilla 139: Documentation and portability issues.
352 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
353 Handle per-OS dynamic-module compilation flags.
355 PP/02 Let /dev/null have normal permissions.
356 The 4.73 fixes were a little too stringent and complained about the
357 permissions on /dev/null. Exempt it from some checks.
358 Reported by Andreas M. Kirchwitz.
360 PP/03 Report version information for many libraries, including
361 Exim version information for dynamically loaded libraries. Created
362 version.h, now support a version extension string for distributors
363 who patch heavily. Dynamic module ABI change.
365 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
366 privilege escalation vulnerability whereby the Exim run-time user
367 can cause root to append content of the attacker's choosing to
370 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
373 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
374 If dropping privileges for untrusted macros, we disabled normal logging
375 on the basis that it would fail; for the Exim run-time user, this is not
376 the case, and it resulted in successful deliveries going unlogged.
377 Fixed. Reported by Andreas Metzler.
383 PP/01 Date: & Message-Id: revert to normally being appended to a message,
384 only prepend for the Resent-* case. Fixes regression introduced in
385 Exim 4.70 by NM/22 for Bugzilla 607.
387 PP/02 Include check_rfc2047_length in configure.default because we're seeing
388 increasing numbers of administrators be bitten by this.
390 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
392 PP/03 Bugzilla 994: added openssl_options main configuration option.
394 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
396 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
398 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
400 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
401 without a peer certificate, leading to a segfault because of an
402 assumption that peers always have certificates. Be a little more
403 paranoid. Problem reported by Martin Tscholak.
405 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
406 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
407 NB: ClamAV planning to remove STREAM in "middle of 2010".
408 CL also introduces -bmalware, various -d+acl logging additions and
409 more caution in buffer sizes.
411 PP/09 Implemented reverse_ip expansion operator.
413 PP/10 Bugzilla 937: provide a "debug" ACL control.
415 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
417 PP/12 Bugzilla 973: Implement --version.
419 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
421 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
423 PP/15 Bugzilla 816: support multiple condition rules on Routers.
425 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
426 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
427 ignore trailing whitespace.
429 JJ/02 prevent non-panic DKIM error from being sent to paniclog
431 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
434 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
435 Notification from Dr Andrew Aitchison.
437 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
438 ExtendedDetectionInfo response format.
439 Notification from John Horne.
441 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
444 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
445 XSL and documented dependency on system catalogs, with examples of how
448 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
451 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
452 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
453 configuration file which is writeable by the Exim user or group.
455 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
456 of configuration files to cover files specified with the -C option if
457 they are going to be used with root privileges, not just the default
460 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
461 option (effectively making it always true).
463 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
464 files to be used while preserving root privileges.
466 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
467 that rogue child processes cannot use them.
469 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
470 run-time user, instead of root.
472 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
473 Exim run-time user without dropping privileges.
475 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
476 result string, instead of calling string_vformat() twice with the same
479 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
480 for other users. Others should always drop root privileges if they use
481 -C on the command line, even for a whitelisted configure file.
483 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
485 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
491 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
492 $data_path, and $header_path variables; fixed documentation bugs and
495 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
496 exipick to access non-standard spools, including the "frozen" queue
499 NM/01 Bugzilla 965: Support mysql stored procedures.
500 Patch from Alain Williams
502 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
504 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
505 Patch from Andreas Metzler
507 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
508 Patch from Kirill Miazine
510 NM/05 Bugzilla 671: Added umask to procmail example.
512 JJ/03 installed exipick 20100323.0, fixing doc bug
514 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
515 directory. Notification and patch from Dan Rosenberg.
517 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
519 TK/02 Improve log output when DKIM signing operation fails.
521 MH/01 Treat the transport option dkim_domain as a colon separated
522 list, not as a single string, and sign the message with each element,
523 omitting multiple occurences of the same signer.
525 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
526 Bugzilla 985, 986. Patch by Simon Arlott
528 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
529 Patch by Simon Arlott
531 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
532 MBX locking. Notification from Dan Rosenberg.
538 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
540 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
542 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
544 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
546 NM/04 Bugzilla 915: Flag broken perl installation during build.
552 TK/01 Added patch by Johannes Berg that expands the main option
553 "spamd_address" if it starts with a dollar sign.
555 TK/02 Write list of recipients to X-Envelope-Sender header when building
556 the mbox-format spool file for content scanning (suggested by Jakob
559 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
560 (http://www.dcc-servers.net/) support via dccifd. Activated by
561 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
563 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
564 by Mark Daniel Reidel <mr@df.eu>.
566 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
567 When building exim an external PCRE library is now needed -
568 PCRE is a system library on the majority of modern systems.
569 See entry on PCRE_LIBS in EDITME file.
571 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
572 conversation. Added nologin parameter to request.
573 Patch contributed by Kirill Miazine.
575 TF/01 Do not log submission mode rewrites if they do not change the address.
577 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
579 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
580 log files in place. Contributed by Roberto Lima.
582 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
584 TF/03 Bugzilla 615: When checking the local_parts router precondition
585 after a local_part_suffix or local_part_prefix option, Exim now
586 does not use the address's named list lookup cache, since this
587 contains cached lookups for the whole local part.
589 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
590 Robert Millan. Documentation is in experimental-spec.txt.
592 TF/04 Bugzilla 668: Fix parallel build (make -j).
594 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
596 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
597 Patch provided by Jan Srzednicki.
599 TF/05 Leading white space used to be stripped from $spam_report which
600 wrecked the formatting. Now it is preserved.
602 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
603 that they are available at delivery time.
605 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
607 TF/08 TLS error reporting now respects the incoming_interface and
608 incoming_port log selectors.
610 TF/09 Produce a more useful error message if an SMTP transport's hosts
611 setting expands to an empty string.
613 NM/06 Bugzilla 744: EXPN did not work under TLS.
614 Patch provided by Phil Pennock.
616 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
617 Patch provided by Richard Godbee.
619 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
620 acl_smtp_notquit, added index entry.
622 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
623 Patch provided by Eugene Bujak.
625 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
626 accept(). Patch provided by Maxim Dounin.
628 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
629 Patch provided by Phil Pennock.
631 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
633 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
634 Patch provided by Brad "anomie" Jorsch.
636 NM/14 Bugzilla 622: Added timeout setting to transport filter.
637 Patch provided by Dean Brooks.
639 TK/05 Add native DKIM support (does not depend on external libraries).
641 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
642 Patch provided by Graeme Fowler.
644 NM/16 Bugzilla 851: Documentation example syntax fix.
646 NM/17 Changed NOTICE file to remove references to embedded PCRE.
648 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
651 NM/19 Bugzilla 745: TLS version reporting.
652 Patch provided by Phil Pennock.
654 NM/20 Bugzilla 167: bool: condition support.
655 Patch provided by Phil Pennock.
657 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
658 clients. Patch provided by Phil Pennock.
660 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
661 Patch provided by Brad "anomie" Jorsch.
663 NM/23 Bugzilla 687: Fix misparses in eximstats.
664 Patch provided by Heiko Schlittermann.
666 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
667 Patch provided by Heiko Schlittermann.
669 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
670 plus update to original patch.
672 NM/26 Bugzilla 799: Documentation correction for ratelimit.
674 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
675 Patch provided by David Brownlee.
677 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
679 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
681 NM/30 Bugzilla 888: TLS documentation bugfixes.
683 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
685 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
686 Unlike the original bugzilla I have changed all shell scripts in src tree.
688 NM/33 Bugzilla 898: Transport filter timeout fix.
689 Patch by Todd Rinaldo.
691 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
692 Patch by Serge Demonchaux.
694 NM/35 Bugzilla 39: Base64 decode bug fixes.
695 Patch by Jakob Hirsch.
697 NM/36 Bugzilla 909: Correct connect() call in dcc code.
699 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
701 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
703 NM/39 Bugzilla 911: Fixed MakeLinks build script.
709 TK/01 Add preliminary DKIM support. Currently requires a forked version of
710 ALT-N's libdkim that I have put here:
711 http://duncanthrax.net/exim-experimental/
713 Note to Michael Haardt: I had to rename some vars in sieve.c. They
714 were called 'true' and it seems that C99 defines that as a reserved
715 keyword to be used with 'bool' variable types. That means you could
716 not include C99-style headers which use bools without triggering
717 build errors in sieve.c.
719 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
720 as mailq or other aliases. Changed the --help handling significantly
721 to do whats expected. exim_usage() emits usage/help information.
723 SC/01 Added the -bylocaldomain option to eximstats.
725 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
727 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
729 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
735 PH/01 Another patch from the Sieve maintainer.
737 PH/02 When an IPv6 address is converted to a string for single-key lookup
738 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
739 dots are used instead of colons so that keys in lsearch files need not
740 contain colons. This was done some time before quoting was made available
741 in lsearch files. However, iplsearch files do require colons in IPv6 keys
742 (notated using the quote facility) so as to distinguish them from IPv4
743 keys. This meant that lookups for IP addresses in host lists did not work
744 for iplsearch lookups.
746 This has been fixed by arranging for IPv6 addresses to be expressed with
747 colons if the lookup type is iplsearch. This is not incompatible, because
748 previously such lookups could never work.
750 The situation is now rather anomolous, since one *can* have colons in
751 ordinary lsearch keys. However, making the change in all cases is
752 incompatible and would probably break a number of configurations.
754 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
757 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
758 conversion specification without a maximum field width, thereby enabling
759 a rogue spamd server to cause a buffer overflow. While nobody in their
760 right mind would setup Exim to query an untrusted spamd server, an
761 attacker that gains access to a server running spamd could potentially
762 exploit this vulnerability to run arbitrary code as the Exim user.
764 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
765 $primary_hostname instead of what libspf2 thinks the hosts name is.
767 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
768 a directory entry by the name of the lookup key. Previously, if a
769 symlink pointed to a non-existing file or a file in a directory that
770 Exim lacked permissions to read, a lookup for a key matching that
771 symlink would fail. Now it is enough that a matching directory entry
772 exists, symlink or not. (Bugzilla 503.)
774 PH/03 The body_linecount and body_zerocount variables are now exported in the
777 PH/04 Added the $dnslist_matched variable.
779 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
780 This means they are set thereafter only if the connection becomes
783 PH/06 Added the client_condition to authenticators so that some can be skipped
784 by clients under certain conditions.
786 PH/07 The error message for a badly-placed control=no_multiline_responses left
787 "_responses" off the end of the name.
789 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
791 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
792 (without spaces) instead of just copying the configuration text.
794 PH/10 Added the /noupdate option to the ratelimit ACL condition.
796 PH/11 Added $max_received_linelength.
798 PH/12 Added +ignore_defer and +include_defer to host lists.
800 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
801 way in which PCRE > 7.0 is built.
803 PH/14 Implemented queue_only_load_latch.
805 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
806 MAIL command. The effect was to mangle the value on 64-bit systems.
808 PH/16 Another patch from the Sieve maintainer.
810 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
812 PH/18 If a system quota error occurred while trying to create the file for
813 a maildir delivery, the message "Mailbox is full" was not appended to the
814 bounce if the delivery eventually timed out. Change 4.67/27 below applied
815 only to a quota excession during the actual writing of the file.
817 PH/19 It seems that peer DN values may contain newlines (and other non-printing
818 characters?) which causes problems in log lines. The DN values are now
819 passed through string_printing() before being added to log lines.
821 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
822 and InterBase are left for another time.)
824 PH/21 Added message_body_newlines option.
826 PH/22 Guard against possible overflow in moan_check_errorcopy().
828 PH/23 POSIX allows open() to be a macro; guard against that.
830 PH/24 If the recipient of an error message contained an @ in the local part
831 (suitably quoted, of course), incorrect values were put in $domain and
832 $local_part during the evaluation of errors_copy.
838 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
839 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
842 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
843 issue a MAIL command.
845 PH/02 In an ACL statement such as
847 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
849 if a client was not listed at all, or was listed with a value other than
850 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
851 the condition was not true (as it should be), so access was not denied.
852 The bug was that the ! inversion was incorrectly passed on to the second
853 item. This has been fixed.
855 PH/03 Added additional dnslists conditions == and =& which are different from
856 = and & when the dns lookup returns more than one IP address.
858 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
859 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
861 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
862 FSYNC, which compiles an option called disable_fsync that allows for
863 bypassing fsync(). The documentation is heavily laced with warnings.
865 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
867 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
868 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
869 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
870 including adding "make clean"; (3) Added -fPIC when compiling the test
871 dynamically loaded module, to get rid of a warning.
873 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
874 message fails, move_frozen_messages = true and ignore_bounce_errors_after
875 = 0s. The bug is otherwise harmless.
877 PH/07 There was a bug in the dovecot authenticator such that the value of
878 $auth1 could be overwritten, and so not correctly preserved, after a
879 successful authentication. This usually meant that the value preserved by
880 the server_setid option was incorrect.
882 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
884 PH/09 Installed PCRE release 7.0.
886 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
887 run for batched SMTP input. It is now run at the start of every message
888 in the batch. While fixing this I discovered that the process information
889 (output by running exiwhat) was not always getting set for -bs and -bS
890 input. This is fixed, and it now also says "batched" for BSMTP.
892 PH/11 Added control=no_pipelining.
894 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
895 patch, slightly modified), and move the expansion of helo_data till after
896 the connection is made in the smtp transport (so it can use these
899 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
901 PH/14 Added log_selector = +pid.
903 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
905 PH/16 Add ${if forany and ${if forall.
907 PH/17 Added dsn_from option to vary the From: line in DSNs.
909 PH/18 Flush SMTP output before performing a callout, unless control =
910 no_callout_flush is set.
912 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
913 was true (the default) a successful delivery failed to delete the retry
914 item, thus causing premature timeout of the address. The bug is now
917 PH/20 Added hosts_avoid_pipelining to the smtp transport.
919 PH/21 Long custom messages for fakedefer and fakereject are now split up
920 into multiline reponses in the same way that messages for "deny" and
921 other ACL rejections are.
923 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
924 with slight modification.
926 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
927 draft, changing the syntax and factoring some duplicate code".
929 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
930 for deliveries of the second and subsequent messages over the same SMTP
933 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
934 ${reduce, with only minor "tidies".
936 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
938 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
939 expansion side effects.
941 PH/27 When a message times out after an over-quota error from an Exim-imposed
942 quota, the bounce message says "mailbox is full". This message was not
943 being given when it was a system quota that was exceeded. It now should
946 MH/03 Made $recipients available in local_scan(). local_scan() already has
947 better access to the recipient list through recipients_list[], but
948 $recipients can be useful in postmaster-provided expansion strings.
950 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
951 in the case of a MAIL command with additional options following the
952 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
953 were accidentally chopped off.
955 PH/29 SMTP synchronization checks are implemented when a command is read -
956 there is a check that no more input is waiting when there shouldn't be
957 any. However, for some commands, a delay in an ACL can mean that it is
958 some time before the response is written. In this time, more input might
959 arrive, invalidly. So now there are extra checks after an ACL has run for
960 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
961 pipelining has not been advertised.
963 PH/30 MH's patch to allow iscntrl() characters to be list separators.
965 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
966 returned in the SMTP response when smtp_return_error_details was false.
969 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
970 instead of the C I/O that was originally supplied, because problems were
973 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
974 Exim which did not show up earlier: it was assuming that a call to
975 SSL_CTX_set_info_callback() might give an error value. In fact, there is
976 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
977 was a macro that became an assignment, so it seemed to work. This has
978 changed to a proper function call with a void return, hence the compile
979 error. Exim's code has been fixed.
981 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
984 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
986 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
988 PH/37 If a message is not accepted after it has had an id assigned (e.g.
989 because it turns out to be too big or there is a timeout) there is no
990 "Completed" line in the log. When some messages of this type were
991 selected by exigrep, they were listed as "not completed". Others were
992 picked up by some special patterns. I have improved the selection
993 criteria to be more general.
995 PH/38 The host_find_failed option in the manualroute router can now be set
996 to "ignore", to completely ignore a host whose IP address cannot be
997 found. If all hosts are ignored, the behaviour is controlled by the new
998 host_all_ignored option.
1000 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1001 homing or because of multiple MX records with /mx) generated more than
1002 one IP address, and the following item turned out to be the local host,
1003 all the secondary addresses of the first item were incorrectly removed
1004 from the list, along with the local host and any following hosts (which
1005 is what is supposed to happen).
1007 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1008 whoever called Exim into the -H file. In the case of the daemon it was
1009 behaving confusingly. When first started, it used values for whoever
1010 started the daemon, but after a SIGHUP it used the Exim user (because it
1011 calls itself on a restart). I have changed the code so that it now always
1014 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1015 message are rejected with the same error (e.g. no authentication or bad
1016 sender address), and a DATA command is nevertheless sent (as can happen
1017 with PIPELINING or a stupid MUA), the error message that was given to the
1018 RCPT commands is included in the rejection of the DATA command. This is
1019 intended to be helpful for MUAs that show only the final error to their
1022 PH/42 Another patch from the Sieve maintainer.
1024 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1025 Eximstats - Fixed some broken HTML links and added missing column headers
1027 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1028 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1030 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1032 PH/43 Yet another patch from the Sieve maintainer.
1034 PH/44 I found a way to check for a TCP/IP connection going away before sending
1035 the response to the final '.' that terminates a message, but only in the
1036 case where the client has not sent further data following the '.'
1037 (unfortunately, this is allowed). However, in many cases there won't be
1038 any further data because there won't be any more messages to send. A call
1039 to select() can be used: if it shows that the input is "ready", there is
1040 either input waiting, or the socket has been closed. An attempt to read
1041 the next input character can distinguish the two cases. Previously, Exim
1042 would have sent an OK response which the client would never have see.
1043 This could lead to message repetition. This fix should cure that, at
1044 least in a lot of common cases.
1046 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1047 advertised in response to EHLO.
1053 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1054 fixed by 4.65/MH/01 (is this a record?) are fixed:
1056 (i) An empty string was always treated as zero by the numeric comparison
1057 operators. This behaviour has been restored.
1059 (ii) It is documented that the numeric comparison operators always treat
1060 their arguments as decimal numbers. This was broken in that numbers
1061 starting with 0 were being interpreted as octal.
1063 While fixing these problems I realized that there was another issue that
1064 hadn't been noticed. Values of message_size_limit (both the global option
1065 and the transport option) were treated as octal if they started with 0.
1066 The documentation was vague. These values are now always treated as
1067 decimal, and I will make that clear in the documentation.
1073 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1074 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1077 MH/01 Don't check that the operands of numeric comparison operators are
1078 integers when their expansion is in "skipping" mode (fixes bug
1079 introduced by 4.64-PH/07).
1081 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1082 child addresses, Exim now panics and dies. Previously, because the count
1083 is held in a short int, deliveries were likely to be lost. As such a
1084 large number of recipients for a single message is ridiculous
1085 (performance will be very, very poor), I have chosen to impose a limit
1086 rather than extend the field.
1092 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1093 leftover -K file (the existence of which was triggered by #402).
1094 While we were at it, introduced process PID as part of the -K
1095 filename. This should rule out race conditions when creating
1098 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1099 processing considerably. Previous code took too long for large mails,
1100 triggering a timeout which in turn triggers #401.
1102 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1103 in the DK code in transports.c. sendfile() is not really portable,
1104 hence the _LINUX specificness.
1106 TF/01 In the add_headers option to the mail command in an Exim filter,
1107 there was a bug that Exim would claim a syntax error in any
1108 header after the first one which had an odd number of characters
1111 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1112 callout verification, Exim cached a "reject" for the entire domain. This
1113 is correct for most verifications, but it is not correct for a recipient
1114 verification with use_sender or use_postmaster set, because in that case
1115 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1116 case of MAIL FROM:<> rejection from other early rejections (e.g.
1117 rejection of HELO). When verifying a recipient using a non-null MAIL
1118 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1119 Whatever the result of the callout, the value of the domain cache is
1120 left unchanged (for any other kind of callout, getting as far as trying
1121 RCPT means that the domain itself is ok).
1123 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1126 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1127 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1128 session, the daemon ignores ECONNECT errors and logs others; it now
1129 ignores EPIPE as well.
1131 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1132 (quoted-printable decoding).
1134 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1135 later the small subsequent patch to fix an introduced bug.
1137 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1139 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1141 PH/08 An error is now given if message_size_limit is specified negative.
1143 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1144 to be given (somewhat) arbitrary names.
1146 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1149 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1150 miscellaneous code fixes
1152 PH/10 Added the log_reject_target ACL modifier to specify where to log
1155 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1156 hostname. This is wrong, because it relates to the incoming message (and
1157 probably the interface on which it is arriving) and not to the outgoing
1158 callout (which could be using a different interface). This has been
1159 changed to use the value of the helo_data option from the smtp transport
1160 instead - this is what is used when a message is actually being sent. If
1161 there is no remote transport (possible with a router that sets up host
1162 addresses), $smtp_active_hostname is used.
1164 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1165 tweaks were necessary in order to get it to work (see also 21 below):
1166 (a) The code assumed that strncpy() returns a negative number on buffer
1167 overflow, which isn't the case. Replaced with Exim's string_format()
1169 (b) There were several signed/unsigned issues. I just did the minimum
1170 hacking in of casts. There is scope for a larger refactoring.
1171 (c) The code used strcasecmp() which is not a standard C function.
1172 Replaced with Exim's strcmpic() function.
1173 (d) The code set only $1; it now sets $auth1 as well.
1174 (e) A simple test gave the error "authentication client didn't specify
1175 service in request". It would seem that Dovecot has changed its
1176 interface. Fortunately there's a specification; I followed it and
1177 changed what the client sends and it appears to be working now.
1179 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1182 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1183 address A is aliased to B and C, where B exists and C does not. Without
1184 -v the output is "A verified" because verification stops after a
1185 successful redirection if more than one address is generated. However,
1186 with -v the child addresses are also verified. Exim was outputting "A
1187 failed to verify" and then showing the successful verification for C,
1188 with its parentage. It now outputs "B failed to verify", showing B's
1189 parentage before showing the successful verification of C.
1191 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1192 look up a TXT record in a specific list after matching in a combined
1195 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1196 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1197 they consult the DNS. I had assumed they would set it the way they
1198 wanted; and indeed my experiments on Linux seem to show that in some
1199 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1200 To be on the safe side, however, I have now made the interface to
1201 host_find_byname() similar to host_find_bydns(), with an argument
1202 containing the DNS resolver options. The host_find_byname() function now
1203 sets these options at its start, just as host_find_bydns() does. The smtp
1204 transport options dns_qualify_single and dns_search_parents are passed to
1205 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1206 of host_find_byname() use the default settings of RES_DEFNAMES
1207 (qualify_single) but not RES_DNSRCH (search_parents).
1209 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1210 spool_read_header() do less string testing, by means of a preliminary
1211 switch on the second character of optional "-foo" lines. (This is
1212 overdue, caused by the large number of possibilities that now exist.
1213 Originally there were few.) While I was there, I also converted the
1214 str(n)cmp tests so they don't re-test the leading "-" and the first
1215 character, in the hope this might squeeze out yet more improvement.
1217 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1218 flag allowing group syntax was set by the header_syntax check but not
1219 turned off, possible causing trouble later; (2) The flag was not being
1220 set at all for the header_verify test, causing "group"-style headers to
1221 be rejected. I have now set it in this case, and also caused header_
1222 verify to ignore an empty address taken from a group. While doing this, I
1223 came across some other cases where the code for allowing group syntax
1224 while scanning a header line wasn't quite right (mostly, not resetting
1225 the flag correctly in the right place). These bugs could have caused
1226 trouble for malformed header lines. I hope it is now all correct.
1228 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1229 with the "reply" argument non-NULL. The code, however (which originally
1230 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1231 but it didn't always do it. This confused somebody who was copying the
1232 code for some other use. I have removed all the tests.
1234 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1235 feature that was used to support insecure browsers during the U.S. crypto
1236 embargo. It requires special client support, and Exim is probably the
1237 only MTA that supported it -- and would never use it because real RSA is
1238 always available. This code has been removed, because it had the bad
1239 effect of slowing Exim down by computing (never used) parameters for the
1240 RSA_EXPORT functionality.
1242 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1243 authenticator to fail if there's a tab character in the incoming data
1244 (there should never be unless someone is messing about, as it's supposed
1245 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1246 if the connection is using TLS or if the remote IP is the same as the
1247 local IP, and the "valid-client-cert option" if a client certificate has
1250 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1251 authenticators. This can be used for authorization after authentication
1252 succeeds. (In the case of plaintext, it servers for both authentication
1255 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1256 if any retry times were supplied.
1258 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1259 connection, where there is no client IP address to check. In this
1260 situation, the verify now always succeeds.
1262 PH/25 Applied John Jetmore's -Mset patch.
1264 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1266 PH/27 In a string expansion for a processed (not raw) header when multiple
1267 headers of the same name were present, leading whitespace was being
1268 removed from all of them, but trailing whitespace was being removed only
1269 from the last one. Now trailing whitespace is removed from each header
1270 before concatenation. Completely empty headers in a concatenation (as
1271 before) are ignored.
1273 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1274 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1276 PH/29 [Removed. This was a change that I later backed out, and forgot to
1277 correct the ChangeLog entry (that I had efficiently created) before
1278 committing the later change.]
1280 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1281 address errors (4xx response to RCPT) over the same connection as other
1282 messages routed to the same hosts. Such deliveries are always "forced",
1283 so retry times are not inspected. This resulted in far too many retries
1284 for the affected addresses. The effect occurred only when there were more
1285 hosts than the hosts_max_try setting in the smtp transport when it had
1286 the 4xx errors. Those hosts that it had tried were not added to the list
1287 of hosts for which the message was waiting, so if all were tried, there
1288 was no problem. Two fixes have been applied:
1290 (i) If there are any address or message errors in an SMTP delivery, none
1291 of the hosts (tried or untried) are now added to the list of hosts
1292 for which the message is waiting, so the message should not be a
1293 candidate for sending over the same connection that was used for a
1294 successful delivery of some other message. This seems entirely
1295 reasonable: after all the message is NOT "waiting for some host".
1296 This is so "obvious" that I'm not sure why it wasn't done
1297 previously. Hope I haven't missed anything, but it can't do any
1298 harm, as the worst effect is to miss an optimization.
1300 (ii) If, despite (i), such a delivery is accidentally attempted, the
1301 routing retry time is respected, so at least it doesn't keep
1302 hammering the server.
1304 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1305 in ${readsocket because some servers need this prod.
1307 PH/32 Added some extra debug output when updating a wait-xxx database.
1309 PH/33 The hint "could be header name not terminated by colon", which has been
1310 given for certain expansion errors for a long time, was not being given
1311 for the ${if def:h_colon_omitted{... case.
1313 PH/34 The spec says: "With one important exception, whenever a domain list is
1314 being scanned, $domain contains the subject domain." There was at least
1315 one case where this was not true.
1317 PH/35 The error "getsockname() failed: connection reset by peer" was being
1318 written to the panic log as well as the main log, but it isn't really
1319 panic-worthy as it just means the connection died rather early on. I have
1320 removed the panic log writing for the ECONNRESET error when getsockname()
1323 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1324 runs only) independently of the message's sender address. This meant
1325 that, if the 4xx error was in fact related to the sender, a different
1326 message to the same recipient with a different sender could confuse
1327 things. In particualar, this can happen when sending to a greylisting
1328 server, but other circumstances could also provoke similar problems.
1329 I have changed the default so that the retry time for these errors is now
1330 based a combination of the sender and recipient addresses. This change
1331 can be overridden by setting address_retry_include_sender=false in the
1334 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1335 remote server are returned as part of bounce messages. This was not
1336 happening for LMTP over a pipe (the lmtp transport), but now it is the
1337 same for both kinds of LMTP.
1339 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1340 in header lines that were in fact CNAMEs. This is no longer the case.
1342 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1343 and queue runs started by the daemon processed all messages. This has
1344 been fixed so that -R and -S can now usefully be given with -q<time>.
1346 PH/40 Import PCRE release 6.7 (fixes some bugs).
1348 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1350 PH/42 Give an error if -q is specified more than once.
1352 PH/43 Renamed the variables $interface_address and $interface_port as
1353 $received_ip_address and $received_port, to make it clear that these
1354 values apply to message reception, and not to the outgoing interface when
1355 a message is delivered. (The old names remain recognized, of course.)
1357 PH/44 There was no timeout on the connect() call when using a Unix domain
1358 socket in the ${readsocket expansion. There now is.
1360 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1361 be meaningful with "accept".
1363 SC/01 Eximstats V1.43
1364 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1366 SC/02 Eximstats V1.44
1367 Use a glob alias rather than an array ref in the generated
1368 parser. This improves both readability and performance.
1370 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1371 Collect SpamAssassin and rejection statistics.
1372 Don't display local sender or destination tables unless
1373 there is data to show.
1374 Added average volumes into the top table text output.
1376 SC/04 Eximstats V1.46
1377 Collect data on the number of addresses (recipients)
1378 as well as the number of messages.
1380 SC/05 Eximstats V1.47
1381 Added 'Message too big' to the list of mail rejection
1382 reasons (thanks to Marco Gaiarin).
1384 SC/06 Eximstats V1.48
1385 Mainlog lines which have GMT offsets and are too short to
1386 have a flag are now skipped.
1388 SC/07 Eximstats V1.49 (Alain Williams)
1389 Added the -emptyok flag.
1391 SC/08 Eximstats V1.50
1392 Fixes for obtaining the IP address from reject messages.
1394 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1395 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1396 whitesspace changes from 4.64-PH/27
1398 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1401 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1402 are found, allow negative numbers in numeric criteria)
1404 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1406 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1407 to match changes made in 4.64-PH/43
1409 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1411 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1412 "domain" is actually an IP address, and force a failure. This locks out
1413 those revolvers/nameservers that support "A-for-A" lookups, in
1414 contravention of the specifications.
1416 PH/48 When a host name was looked up from an IP address, and the subsequent
1417 forward lookup of the name timed out, the host name was left in
1418 $sender_host_name, contrary to the specification.
1420 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1421 restricted to single-key lookups, Exim was not diagnosing an error if
1422 * or *@ was used with a query-style lookup.
1424 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1426 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1427 long ago, but noone interested enough thought of it. Let's just say that
1428 the "1.1" means that there are some new functions that weren't there at
1429 some point in the past.
1431 PH/51 Error processing for expansion failure of helo_data from an smtp
1432 transport during callout processing was broken.
1434 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1435 tested/used via the -bh/-bhc/-bs options.
1437 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1438 bug, fixed in subsequent PCRE releases).
1440 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1441 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1443 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1449 SC/01 Use a glob alias rather than an array ref in eximstats generated
1450 parser. This improves both readability and performance.
1452 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1453 Don't display local sender or destination tables in eximstats unless
1454 there is data to show.
1455 Added average volumes into the eximstats top table text output.
1457 SC/03 Collect data on the number of addresses (recipients) as well
1458 as the number of messages in eximstats.
1460 TF/01 Correct an error in the documentation for the redirect router. Exim
1461 does (usually) call initgroups() when daemonizing.
1463 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1464 with consistent privilege compared to when running as a daemon.
1466 TF/03 Note in the spec that $authenticated_id is not set for local
1467 submissions from trusted users.
1469 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1470 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1472 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1473 by adding some example configuration directives to the default
1474 configuration file. A little bit of work is required to uncomment the
1475 directives and define how usernames and passwords are checked, but
1476 there is now a framework to start from.
1478 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1479 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1480 without this. I don't know how relevant this is to other LDAP libraries.
1482 PH/02 Add the verb name to the "unknown ACL verb" error.
1484 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1486 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1488 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1489 directory not expanded when it should be if an expanded home directory
1490 was set for the address (which is overridden by the transport).
1492 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1495 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1496 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1497 because it is too late at that time, and has no effect.
1499 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1500 security issue with \' (bugzilla #107). I could not use the
1501 PQescapeStringConn() function, because it needs a PGconn value as one of
1504 PH/08 When testing addresses using -bt, indicate those final addresses that
1505 are duplicates that would not cause an additional delivery. At least one
1506 person was confused, thinking that -bt output corresponded to deliveries.
1507 (Suppressing duplicates isn't a good idea as you lose the information
1508 about possibly different redirections that led to the duplicates.)
1510 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1511 systems where poll() doesn't work, in particular OS X.
1513 PH/10 Added more information to debugging output for retry time not reached.
1515 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1516 operations in malware.c.
1518 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1521 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1522 syslog_duplication set false, log lines that would normally be written
1523 both the the main log and to the reject log were not written to syslog at
1526 PH/14 In the default configuration, change the use of "message" in ACL warn
1527 statements to "add_header".
1529 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1530 not followed by a command (e.g. "seen endif").
1532 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1533 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1536 PH/17 Added extra conditions to the default value of delay_warning_condition
1540 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1541 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1542 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1545 The Auto-Submitted: and various List- headers are standardised, whereas I
1546 don't think Precedence: ever was.
1548 PH/18 Refactored debugging code in route_finduser() to show more information,
1549 in particular, the error code if getpwnam() issues one.
1551 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1552 This is apparently needed in addition to the PH/07 change above to avoid
1553 any possible encoding problems.
1555 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1556 but not after initializing Perl.
1558 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1559 output them only if debugging. By default they are written stderr,
1560 apparently, which is not desirable.
1562 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1565 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1568 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1570 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1571 authenticated or an ident call has been made. Suppress the default
1572 values for $authenticated_id and $authenticated_sender (but permit -oMai
1573 and -oMas) when testing with -bh.
1575 PH/24 Re-jigged the order of the tests in the default configuration so that the
1576 tests for valid domains and recipients precede the DNS black list and CSA
1577 tests, on the grounds that those ones are more expensive.
1579 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1580 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1581 This bug exists in every version of Exim that I still have, right back to
1584 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1585 However, an attempt to turn on case-sensitivity in a regex key by
1586 including (?-i) didn't work because the subject string was already
1587 lowercased, and the effects were non-intuitive. It turns out that a
1588 one-line patch can be used to allow (?-i) to work as expected.
1594 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1595 other effects) broke the use of negated acl sub-conditions.
1597 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1600 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1601 "Deny" causes Exim to reject the incoming connection with a 554 error.
1602 Unfortunately, if there is a major crisis, such as a disk failure,
1603 tcp-wrappers gives "deny", whereas what one would like would be some
1604 kind of temporary error. A kludge has been added to help with this.
1605 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1606 554 error is used if errno is still zero or contains ENOENT (which occurs
1607 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1610 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1612 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1613 errors. Otherwise a message that provokes a temporary error (when other
1614 messages do not) can cause a whole host to time out.
1616 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1617 addresses were routed directly to files or pipes from a redirect router.
1618 File deliveries just didn't batch; pipe deliveries might have suffered
1621 PH/06 A failure to get a lock for a hints database would erroneously always say
1622 "Failed to get write lock", even when it was really a read lock.
1624 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1625 of 0600. This has been changed to use the value of the lockfile_mode
1626 option (which defaults to 0600).
1628 PH/08 Applied small patch from the Sieve maintainer.
1630 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1631 folder from quota calculations, a direct delivery into this folder messed
1632 up the contents of the maildirsize file. This was because the regex was
1633 used only to exclude .Trash (or whatever) when the size of the mailbox
1634 was calculated. There was no check that a delivery was happening into an
1635 excluded directory. This bug has been fixed by ignoring all quota
1636 processing for deliveries into excluded directories.
1638 PH/10 Added the maildirfolder_create_regex option to appendfile.
1644 PH/01 The code for finding all the local interface addresses on a FreeBSD
1645 system running IPv6 was broken. This may well have applied to all BSD
1646 systems, as well as to others that have similar system calls. The broken
1647 code found IPv4 interfaces correctly, but gave incorrect values for the
1648 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1649 that it would not match correctly against @[] and not recognize the IPv6
1652 PH/02 The ipliteral router was not recognizing addresses of the form user@
1653 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1655 PH/03 Added disable_ipv6.
1657 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1658 decoded form, because it is most often used to construct To: headers
1659 lines in autoreplies, and the decoded form may well be syntactically
1660 invalid. However, $reply_address has leading white space removed, and all
1661 newlines turned into spaces so that the autoreply transport does not
1664 PH/05 If group was specified without a user on a router, and no group or user
1665 was specified on a transport, the group from the router was ignored.
1667 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1668 for visible compile-time settings that can be used to change these
1669 numbers, for those that want even more. Backwards compatibility with old
1670 spool files has been maintained. However, going back to a previous Exim
1671 release will lost any variables that are in spool files.
1673 PH/07 Two small changes when running in the test harness: increase delay when
1674 passing a TCP/IP connection to a new process, in case the original
1675 process has to generate a bounce, and remove special handling of
1676 127.0.0.2 (sic), which is no longer necessary.
1678 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1679 be the same on different OS.
1681 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1684 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1685 whether --show-vars was specified or not
1687 JJ/02 exipick: Added support for new ACL variable spool format introduced
1690 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1691 syntactically invalid From: or Reply-to: line, and a filter used this to
1692 generate an autoreply, and therefore failed to obtain an address for the
1693 autoreply, Exim could try to deliver to a non-existent relative file
1694 name, causing unrelated and misleading errors. What now happens is that
1695 it logs this as a hard delivery error, but does not attempt to create a
1698 PH/11 The exinext utility has a -C option for testing purposes, but although
1699 the given file was scanned by exinext itself; it wasn't being passed on
1700 when Exim was called.
1702 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1703 an end-of-file indication when reading a command response.
1705 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1706 compiled. In many other places in Exim, IPv6 addresses are always
1707 recognized, so I have changed this. It also means that IPv4 domain
1708 literals of the form [IPV4:n.n.n.n] are now always recognized.
1710 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1711 used if the router is not running as root, for example, when verifying at
1712 ACL time, or when using -bh. The debugging output from this situation was
1713 non-existent - all you got was a failure to exec. I have made two
1716 (a) Failures to set uid/gid, the current directory, or a process leader
1717 in a subprocess such as that created by queryprogram now generate
1718 suitable debugging ouput when -d is set.
1720 (b) The queryprogram router detects when it is not running as root,
1721 outputs suitable debugging information if -d is set, and then runs
1722 the subprocess without attempting to change uid/gid.
1724 PH/15 Minor change to Makefile for building test_host (undocumented testing
1727 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1728 additional section of a DNS packet that returns MX or SRV records.
1729 Instead, it always explicitly searches for A/AAAA records. This avoids
1730 major problems that occur when a DNS server includes only records of one
1731 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1732 fixed another bug: if SRV records were looked up and the corresponding
1733 address records were *not* found in the additional section, the port
1734 values from the SRV records were lost.
1736 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1737 using the correct key (the original address) when searching the retry
1738 rules in order to find which one to use for generating the retry hint.
1740 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1741 adding the default one. Similarly, if it contains a Reply-To: header, the
1742 errors_reply_to option, if set, is not used.
1744 PH/19 When calculating a retry time, Exim used to measure the "time since
1745 failure" by looking at the "first failed" field in the retry record. Now
1746 it does not use this if it is later than than the arrival time of the
1747 message. Instead it uses the arrival time. This makes for better
1748 behaviour in cases where some deliveries succeed, thus re-setting the
1749 "first failed" field. An example is a quota failure for a huge message
1750 when small messages continue to be delivered. Without this change, the
1751 "time since failure" will always be short, possible causing more frequent
1752 delivery attempts for the huge message than are intended.
1753 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1755 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1756 $1, $2, $3) because the numerical variables can be reset during some
1757 expansion items (e.g. "match"), thereby losing the authentication data.
1759 PH/21 Make -bV show the size of off_t variables so that the test suite can
1760 decide whether to run tests for quotas > 2G.
1762 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1763 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1764 filecount value is greater than 2G or if a quota value is greater than 2G
1765 on a system where the size of off_t is not greater than 4, a panic error
1768 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1769 never match. The debug and -bh output now contains an explicit error
1770 message indicating a malformed IPv4 address or mask.
1772 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1773 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1774 PH/23 above applies.
1776 PH/25 Do not write to syslog when running in the test harness. The only
1777 occasion when this arises is a failure to open the main or panic logs
1778 (for which there is an explicit test).
1780 PH/26 Added the /no_tell option to "control=freeze".
1782 PH/27 If a host name lookup failed very early in a connection, for example, if
1783 the IP address matched host_lookup and the reverse lookup yielded a name
1784 that did not have a forward lookup, an error message of the form "no IP
1785 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1786 could be logged. Now it outputs the IP address instead of "NULL".
1788 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1789 allows the sender and the authenticated sender to be set when
1790 submitting a message from within Exim. Since child_open_exim() is
1791 documented for local_scan(), the new function should be too.
1793 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1794 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1795 results in an empty string is now treated as unset.
1797 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1799 PH/31 Added sender_verify_fail logging option.
1801 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1802 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1803 tidied the source and removed it altogether.
1805 PH/33 When a queue run was abandoned because the load average was too high, a
1806 log line was always written; now it is written only if the queue_run log
1807 selector is set. In addition, the log line for abandonment now contains
1808 information about the queue run such as the pid. This is always present
1809 in "start" and "stop" lines but was omitted from the "abandon" line.
1811 PH/34 Omit spaces between a header name and the colon in the error message that
1812 is given when verify = headers_syntax fails (if there are lots of them,
1813 the message gets confusing).
1815 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1816 names, as there are now some PTR records that contain slashes. This check
1817 is only to protect against broken name servers that fall over on strange
1818 characters, so the fact that it applies to all lookups doesn't matter.
1820 PH/36 Now that the new test suite is complete, we can remove some of the
1821 special code in Exim that was needed for the old test suite. For example,
1822 sorting DNS records because real resolvers return them in an arbitrary
1823 order. The new test suite's fake resolver always returns records in the
1826 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1827 bounces) except when queue_only is set, to avoid logging races between
1828 the different processes.
1830 PH/38 Panic-die if .include specifies a non-absolute path.
1832 PH/39 A tweak to the "H" retry rule from its user.
1834 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1835 a label. They prevented compilation on older perls.
1837 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1838 a warning to be raised on newish perls.
1840 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1841 on queue. Changes to match documented behaviour of showing count of
1842 messages matching specified criteria.
1844 PH/40 Changed the default ident timeout from 30s to 5s.
1846 PH/41 Added support for the use of login_cap features, on those BSD systems
1847 that have them, for controlling the resources used by pipe deliveries.
1849 PH/42 The content-scanning code uses fopen() to create files in which to put
1850 message data. Previously it was not paying any attention to the mode of
1851 the files. Exim runs with umask(0) because the rest of the code creates
1852 files with open(), and sets the required mode explicitly. Thus, these
1853 files were ending up world-writeable. This was not a big issue, because,
1854 being within the spool directory, they were not world-accessible. I have
1855 created a function called modefopen, which takes an additional mode
1856 argument. It sets umask(777), creates the file, chmods it to the required
1857 mode, then resets the umask. All the relevant calls to fopen() in the
1858 content scanning code have been changed to use this function.
1860 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1861 to 24 hours. This avoids potential overflow problems when processing G
1862 and H retry rules. I suspect nobody ever tinkers with this value.
1864 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1866 PH/45 When the plaintext authenticator is running as a client, the server's
1867 challenges are checked to ensure they are valid base64 strings. By
1868 default, the authentication attempt is cancelled if an invalid string is
1869 received. Setting client_ignore_invalid_base64 true ignores these errors.
1870 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1871 they are received. Thus, the responses can be made to depend on the
1872 challenges. If an invalid string is ignored, an empty string is placed in
1875 PH/46 Messages that are created by the autoreply transport now contains a
1876 References: header, in accordance with RFCs 2822 and 3834.
1878 PH/47 Added authenticated_sender_force to the smtp transport.
1880 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1882 PH/49 Installed latest patch from the Sieve maintainer.
1884 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1885 was also set, the appendfile transport was unnecessarily scanning a
1886 directory of message files (e.g. for maildir delivery) to find the count
1887 of files (along with the size), even though it did not need this
1888 information. It now does the scan only if it needs to find either the
1889 size of the count of files.
1891 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1893 PH/52 Two bugs concerned with error handling when the smtp transport is
1896 (i) Exim was not creating retry information for temporary errors given
1897 for individual recipients after the DATA command when the smtp transport
1898 was used in LMTP mode. This meant that they could be retried too
1899 frequently, and not timed out correctly.
1901 (ii) Exim was setting the flag that allows error details to be returned
1902 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1903 recipients that were returned after the DATA command.
1905 PH/53 This is related to PH/52, but is more general: for any failing address,
1906 when detailed error information was permitted to be returned to the
1907 sender, but the error was temporary, then after the final timeout, only
1908 "retry timeout exceeded" was returned. Now it returns the full error as
1909 well as "retry timeout exceeded".
1911 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1912 do this, and (what is worse) MTAs that accept it.
1914 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1915 will now be deprecated.
1917 PH/56 New os.c-cygwin from the Cygwin maintainer.
1919 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1920 formats (previously only available in exim formats via -bpr, -bpru,
1921 and -bpra. Now also available in native and exiqgrep formats)
1923 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1924 with very large, slow to parse queues
1926 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1928 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1930 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1931 responses to authentication challenges, though it was showing the
1932 challenges; (ii) I've removed the CR characters from the debug output for
1935 PH/58 Allow for the insertion of a newline as well as a space when a string
1936 is turned into more than one encoded-word during RFC 2047 encoding. The
1937 Sieve code now uses this.
1939 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1940 data_4xx, lost_connection, tls_required.
1942 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1943 message was being sent as an SMTP response.
1945 PH/61 Add -l and -k options to exicyclog.
1947 PH/62 When verifying, if an address was redirected to one new address, so that
1948 verification continued, and the new address failed or deferred after
1949 having set something in $address_data, the value of $address_data was not
1950 passed back to the ACL. This was different to the case when no
1951 redirection occurred. The value is now passed back in both cases.
1953 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1954 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1955 use login_cap.h, so on its own it isn't the distinguishing feature. The
1956 new name refers directly to the setclassresources() function.
1958 PH/65 Added configuration files for NetBSD3.
1960 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1962 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1963 is preferred over IPv4.
1965 PH/68 The bounce_return_message and bounce_return_body options were not being
1966 honoured for bounces generated during the reception of non-SMTP messages.
1967 In particular, this applied to messages rejected by the ACL. This bug has
1968 been fixed. However, if bounce_return_message is true and bounce_return_
1969 body is false, the headers that are returned for a non-SMTP message
1970 include only those that have been read before the error was detected.
1971 (In the case of an ACL rejection, they have all been read.)
1973 PH/69 The HTML version of the specification is now built in a directory called
1974 spec_html instead of spec.html, because the latter looks like a path with
1975 a MIME-type, and this confuses some software.
1977 PH/70 Catch two compiler warnings in sieve.c.
1979 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1980 function verify_get_ident() calls ip_connect() to connect a socket, but
1981 if the "connect()" function timed out, ip_connect() used to close the
1982 socket. However, verify_get_ident() also closes the socket later, and in
1983 between Exim writes to the log, which may get opened at this point. When
1984 the socket was closed in ip_connect(), the log could get the same file
1985 descriptor number as the socket. This naturally causes chaos. The fix is
1986 not to close the socket in ip_connect(); the socket should be closed by
1987 the function that creates it. There was only one place in the code where
1988 this was missing, in the iplookup router, which I don't think anybody now
1989 uses, but I've fixed it anyway.
1991 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1992 well as to direct DNS lookups. Otherwise the handling of names in host
1993 lists is inconsistent and therefore confusing.
1999 PH/01 Two changes to the default runtime configuration:
2001 (1) Move the checks for relay_from_hosts and authenticated clients from
2002 after to before the (commented out) DNS black list checks.
2004 (2) Add control=submission to the relay_from_hosts and authenticated
2005 clients checks, on the grounds that messages accepted by these
2006 statements are most likely to be submissions.
2008 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2010 (1) Generate an error if the third argument for the ${prvs expansion is
2013 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2016 (3) Reset the variables that are obtained from the first argument of
2017 ${prvscheck and used in the second argument before leaving the code,
2018 because their memory is reclaimed, so using them afterwards may do
2021 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2022 one (it's much easier than Tom thought :-).
2024 (5) Because of (4), we can now allow for the use of $prvscheck_result
2025 inside the third argument.
2027 PH/03 For some reason, the default setting of PATH when running a command from
2028 a pipe transport was just "/usr/bin". I have changed it to
2031 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2032 anything to be listed in the output from -bV.
2034 PH/05 When a filter generated an autoreply, the entire To: header line was
2035 quoted in the delivery log line, like this:
2037 => >A.N.Other <ano@some.domain> <original@ddress> ...
2039 This has been changed so that it extracts the operative address. There
2040 may be more than one such address. If so, they are comma-separated, like
2043 => >ano@some.domain,ona@other.domain <original@ddress> ...
2045 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2046 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2047 not being looked up in the rDNS to get a host name, Exim was showing the
2048 IP address twice in Received: lines, even though the IP addresses were
2049 identical. For example:
2051 Received: from [1.2.3.4] (helo=[1.2.3.4])
2053 However, if the real host name was known, it was omitting the HELO data
2054 if it matched the actual IP address. This has been tidied up so that it
2055 doesn't show the same IP address twice.
2057 PH/07 When both +timestamp and +memory debugging was on, the value given by
2058 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2059 called by the debug printing, thereby overwriting the timestamp buffer.
2060 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2062 PH/08 When the original message was included in an autoreply transport, it
2063 always said "this is a copy of the message, including all the headers",
2064 even if body_only or headers_only was set. It now gives an appropriate
2067 PH/09 Applied a patch from the Sieve maintainer which:
2069 o fixes some comments
2070 o adds the (disabled) notify extension core
2071 o adds some debug output for the result of if/elsif tests
2072 o points to the current vacation draft in the documentation
2073 and documents the missing references header update
2077 o fixes a bug in processing the envelope test (when testing
2078 multiple envelope elements, the last element determinted the
2081 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2082 Electronic Mail") by including:
2084 Auto-submitted: auto-generated
2086 in the messages that it generates (bounce messages and others, such as
2087 warnings). In the case of bounce messages for non-SMTP mesages, there was
2088 also a typo: it was using "Auto_submitted" (underscore instead of
2089 hyphen). Since every message generated by Exim is necessarily in response
2090 to another message, thes have all been changed to:
2092 Auto-Submitted: auto-replied
2094 in accordance with these statements in the RFC:
2096 The auto-replied keyword:
2098 - SHOULD be used on messages sent in direct response to another
2099 message by an automatic process,
2101 - MUST NOT be used on manually-generated messages,
2103 - MAY be used on Delivery Status Notifications (DSNs) and Message
2104 Disposition Notifications (MDNs),
2106 - MUST NOT be used on messages generated by automatic or periodic
2107 processes, except for messages which are automatic responses to
2110 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2111 to the default Received: header definition.
2113 PH/12 Added log selector acl_warn_skipped (default on).
2115 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2116 variables because (a) they are in the wrong storage pool and (b) even if
2117 they were copied, it wouldn't work properly because of the caching.
2119 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2120 checking when decoding. Apparently there are clients that generate
2121 overlong encoded strings. Why am I not surprised?
2123 PH/15 If the first argument of "${if match_address" was not empty, but did not
2124 contain an "@" character, Exim crashed. Now it writes a panic log message
2125 and treats the condition as false.
2127 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2129 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2130 extension "envelope-auth". The code is finished and in agreement with
2131 other implementations, but there is no documentation so far and in fact,
2132 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2133 not changing the active code.
2135 Print executed "if" and "elsif" statements when debugging is used. This
2136 helps a great deal to understand what a filter does.
2138 Document more things not specified clearly in RFC3028. I had all this
2139 sorted out, when out of a sudden new issues came to my mind. Oops."
2141 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2144 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2145 canonical form (as documented). However, after a host name lookup from
2146 the IP address, check_host() was doing a simple string comparison with
2147 addresses acquired from the DNS when checking that the found name did
2148 have the original IP as one of its addresses. Since any found IPv6
2149 addresses are likely to be in abbreviated form, the comparison could
2150 fail. Luckily, there already exists a function for doing the comparison
2151 by converting both addresses to binary, so now that is used instead of
2152 the text comparison.
2154 PH/20 There was another similar case to PH/19, when a complete host name was
2155 given in a host list; looking up its IP address could give an abbreviated
2156 form, whereas the current host's name might or might not be abbreviated.
2157 The same fix has been applied.
2163 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2164 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2167 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2168 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2170 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2172 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2173 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2174 Also, for "Auto-Submitted", treat anything other than "no" as
2175 non-personal, in accordance with RFC 3834. (Previously it treated
2176 anything starting "auto-" as non-personal.)
2178 TF/01 The control=submission/name=... option had a problem with syntax
2179 errors if the name included a slash character. The /name= option
2180 now slurps the rest of the string, so it can include any characters
2181 but it must come last in the list of options (after /sender_retain
2184 PH/05 Some modifications to the interface to the fake nameserver for the new
2192 TK/01 Added the "success_on_redirect" address verification option. See
2193 NewStuff for rationale and an example.
2195 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2197 PH/02 Patch to exigrep to allow it to work on syslog lines.
2199 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2200 fread() to skip over the body file's header line, because in Cygwin the
2201 header line is locked and is inaccessible.
2203 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2204 co-exist for some time) to make it clear that it is the Exim ID that is
2205 referenced, not the Message-ID: header line.
2207 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2208 string_format() function, because snprintf() does not exist on all
2211 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2212 ${stat: expansion item.
2214 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2215 protocol synchronization error", to keep the pedants happy.
2217 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2218 well as for IRIX systems, when gcc is being used. See the host.c source
2221 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2223 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2226 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2227 transport and to the smtp transport in LMTP mode.
2229 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2231 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2232 run a filter in a subprocess. This could lead to confusion in subsequent
2233 lookups in the parent process. There should also be a search_tidyup() at
2234 the end of the subprocess.
2236 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2237 only if the host matched helo_try_verify_hosts, which caused the
2238 verification to occur when the EHLO/HELO command was issued. The ACL just
2239 tested the remembered result. Now, if a previous verification attempt has
2240 not happened, "verify = helo" does it there and then.
2242 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2244 TK/03 Fix log output including CR from clamd.
2246 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2247 exist provoked a memory error which could cause a segfault.
2249 PH/15 Installed PCRE 6.2
2251 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2253 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2254 of the problem. Specifically, suggested +O2 rather than +O1 for the
2257 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2259 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2260 record, the port was not correctly logged when the outgoing_port log
2261 selector was set (it logged the transort's default port).
2263 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2264 fallback_hosts, and "hosts" in the smtp transport.
2266 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2267 host errors such as "Connection refused".
2269 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2270 authentication with radiusclient 0.4.9:
2272 - Error returned from rc_read_config was caught wrongly
2273 - Username/password not passed on to radius server due to wrong length.
2275 The presumption is that some radiusclient API changes for 4.51/PH/17
2276 were not taken care of correctly. The code is still untested by me (my
2277 Linux distribution still has 0.3.2 of radiusclient), but it was
2278 contributed by a Radius user.
2280 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2281 expanding the "port" option of the smtp transport.
2283 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2284 while reading a MIME header. Thanks to Tom Hughes for a patch.
2286 PH/24 Include config.h inside local_scan.h so that configuration settings are
2289 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2290 that in an ACL for RCPT (for example), you can examine exactly what was
2293 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2294 commands, but it was not correctly comparing the address with the actual
2295 client host address. Thus, it would show the EHLO address in Received:
2296 header lines when this was not necessary.
2298 PH/27 Added the % operator to ${eval:}.
2300 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2301 it should be ignoring failures (because with -C, for example, it has lost
2302 privilege). It wasn't ignoring creation failures other than "already
2305 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2308 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2309 because an input line was too long, either on its own, or by virtue of
2310 too many continuations, the temporary file was not being removed, and the
2311 return code was incorrect.
2313 PH/31 Missing "BOOL" in function definition in filtertest.c.
2315 PH/32 Applied Sieve patches from the maintainer.
2317 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2319 PH/33 Added "verify = not_blind".
2321 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2322 Local/Makefile (with some defaults set). These are used in built scripts
2323 such as exicyclog, but they have never been used in the exim_install
2324 script (though there are many overriding facilities there). I have
2325 arranged that the exim_install script now takes note of these two
2328 PH/35 Installed configuration files for Dragonfly.
2330 PH/36 When a locally submitted message by a trusted user did not contain a
2331 From: header, and the sender address was obtained from -f or from an SMTP
2332 MAIL command, and the trusted user did not use -F to supply a sender
2333 name, $originator_name was incorrectly used when constructing a From:
2334 header. Furthermore, $originator_name was used for submission mode
2335 messages from external hosts without From: headers in a similar way,
2336 which is clearly wrong.
2338 PH/37 Added control=suppress_local_fixups.
2340 PH/38 When log_selector = +received_sender was set, and the addition of the
2341 sender made the log line's construction buffer exactly full, or one byte
2342 less than full, an overflow happened when the terminating "\n" was
2345 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2346 when the result of a list match is failure because a DNS lookup failed.
2348 PH/40 RM_COMMAND is now used in the building process.
2350 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2351 the "build-* directories that it finds.
2353 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2354 address in a domain literal was a prefix of an interface address.
2356 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2357 when verifying a sender address, unless rewrite_headers is false.
2359 PH/44 Wrote a long comment about why errors_to addresses are verified as
2360 recipients, not senders.
2362 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2363 the ratelimit ACL was added.
2365 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2367 PH/46 Added extra information about PostgreSQL errors to the error string.
2369 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2370 avoiding the need to install special zones in a real server. This is
2371 backwards compatible; if it can't find the fake resolver, it drops back.
2372 Thus, both old and new test suites can be run.
2374 TF/02 Added util/ratelimit.pl
2376 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2377 clock is set back in time.
2379 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2380 Candler <B.Candler@pobox.com>.
2382 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2383 OK for addresses that are the result of redirections.
2385 PH/48 A number of further additions for the benefit of the new test suite,
2386 including a fake gethostbyname() that interfaces to the fake DNS resolver
2389 TF/06 The fix for widen_domains has also been applied to qualify_single and
2390 search_parents which are the other dnslookup options that can cause
2393 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2396 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2398 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2399 service" if it encountered an MX record with an empty target hostname.
2400 The message is now "an MX or SRV record indicated no SMTP service".
2402 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2403 if the DNS of the sending site is misconfigured. This is quite a
2404 common situation. This change restores the behaviour of treating a
2405 helo verification defer as a failure.
2407 PH/51 If self=fail was set on a router, the bounce message did not include the
2408 actual error message.
2414 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2416 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2417 command itself ended in error, the underlying message about the transport
2418 filter timeout was being overwritten with the pipe command error. Now the
2419 underlying error message should be appended to the second error message.
2421 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2423 PH/02 Reduce the amount of output that "make" produces by default. Full output
2424 can still be requested.
2426 PH/03 The warning log line about a condition test deferring for a "warn" verb
2427 was being output only once per connection, rather than after each
2428 occurrence (because it was using the same function as for successful
2429 "warn" verbs). This seems wrong, so I have changed it.
2431 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2432 it should not have, which might have caused a crash in the right
2433 circumstances, but probably never did.
2435 PH/04 Installed a modified version of Tony Finch's patch to make submission
2436 mode fix the return path as well as the Sender: header line, and to
2437 add a /name= option so that you can make the user's friendly name appear
2440 TF/03 Added the control = fakedefer ACL modifier.
2442 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2443 Mark Lowes for thorough testing.
2445 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2447 TK/03 Merged latest SRS patch from Miles Wilton.
2449 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2450 with the definition in sysexits.h (which is #included earlier).
2451 Fortunately, Exim does not actually use EX_OK. The code used to try to
2452 preserve the sysexits.h value, by assumimg that macro definitions were
2453 scanned for macro replacements. I have been disabused of this notion,
2454 so now the code just undefines EX_OK before #including unistd.h.
2456 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2457 in the smtp transport. When a block could not be written in a single
2458 write() function, the timeout was being re-applied to each part-write.
2459 This seems wrong - if the receiver was accepting one byte at a time it
2460 would take for ever. The timeout is now adjusted when this happens. It
2461 doesn't have to be particularly precise.
2463 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2464 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2466 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2467 without a domain if the check to <postmaster@domain> fails.
2469 SC/01 Eximstats: added -xls and the ability to specify output files
2470 (patch written by Frank Heydlauf).
2472 SC/02 Eximstats: use FileHandles for outputing results.
2474 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2476 SC/04 Eximstats: fixed display of large numbers with -nvr option
2478 SC/05 Eximstats: fixed merging of reports with empty tables.
2480 SC/06 Eximstats: added the -include_original_destination flag
2482 SC/07 Eximstats: removed tabs and trailing whitespace.
2484 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2486 TK/06 MBOX spool code: Add real "From " MBOX separator line
2487 so the .eml file is really in mbox format (even though
2488 most programs do not really care). Patch from Alex Miller.
2490 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2491 The latter is generated from $received_to and is only set if the
2492 message has one envelope recipient. SA can use these headers,
2493 obviously out-of-the-box. Patch from Alex Miller.
2495 PH/08 The ${def test on a variable was returning false if the variable's
2496 value was "0", contrary to what the specification has always said!
2497 The result should be true unless the variable is empty.
2499 PH/09 The syntax error of a character other than { following "${if
2500 def:variable_name" (after optional whitespace) was not being diagnosed.
2501 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2502 accidental colon was present, for example, could give incorrect results.
2504 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2505 result is used (not including appendfile, where other changes are about
2508 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2509 This involved changing a lot of size variables from int to off_t. It
2510 should work with maildirs and everything.
2512 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2513 spamd dying while we are connected to it.
2515 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2518 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2519 function for BDB 4.3.
2521 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2523 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2524 the sources for PCRE have been re-arranged and more files are now
2527 PH/15 The code I had for printing potentially long long variables in PH/11
2528 above was not the best (it lost precision). The length of off_t variables
2529 is now inspected at build time, and an appropriate printing format (%ld
2530 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2531 to be "long long int" or "long int". This is needed for the internal
2532 formatting function string_vformat().
2534 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2535 the configuration file to be ":syslog", then the script "guesses" where
2536 the logs files are, rather than using the compiled in default. In our
2537 case the guess is not the same as the compiled default, so the script
2538 suddenly stopped working when I started to use syslog. The patch checks
2539 to see if log_file_path is "". If so, it attempts to read it from exim
2540 with no configuration file to get the compiled in version, before it
2541 falls back to the previous guessing code."
2543 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2544 implementing BATV in an Exim configuration. See NewStuff for the gory
2547 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2548 Makefile that are specific to HP-UX.
2550 PH/18 If the "use_postmaster" option was set for a recipient callout together
2551 with the "random" option, the postmaster address was used as the MAIL
2552 FROM address for the random test, but not for the subsequent recipient
2553 test. It is now used for both.
2555 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2556 patch removes a few documentation additions to RFC 3028, because the
2557 latest draft now contains them. It adds the new en;ascii-case comparator
2558 and a new error check for 8bit text in MIME parts. Comparator and
2559 require names are now matched exactly. I enabled the subaddress
2560 extension, but it is not well tested yet (read: it works for me)."
2562 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2563 rework some of the code of TK/09 above to avoid the hardwired use of
2564 "%lld" and "long long". Replaced the call to snprintf() with a call to
2567 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2568 records point to non-existent hosts", "retry timeout exceeded", and
2569 "retry time not reached for any host after a long failure period".
2571 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2572 experimental DomainKeys support:
2574 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2575 (2) On an error such as an illegally used "control", the wrong name for
2576 the control was given.
2578 These problems did NOT occur unless DomainKeys support was compiled.
2580 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2582 PH/24 Added ${if match_ip condition.
2584 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2585 databases so that it will be absolutely obvious if a crash occurs in the
2586 DB library. This is a regular occurrence (often caused by mis-matched
2589 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2590 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2591 picked up on a user's system that detects such things. There doesn't seem
2592 to be a gcc warning option for this - only an attribute that has to be
2593 put on the function's prototype. It seems that in Fedora Core 4 they have
2594 set this on a number of new functions. No doubt there will be more in due
2597 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2598 specify a transport. However, if an address that was verified by such a
2599 router was the subject of a callout, Exim crashed because it tried to
2600 read the rcpt_include_affixes from the non-existent transport. Now it
2601 just assumes that the setting of that option is false. This bug was
2602 introduced by 4.51/PH/31.
2604 PH/28 Changed -d+all to exclude +memory, because that information is very
2605 rarely of interest, but it makes the output a lot bigger. People tend to
2606 do -d+all out of habit.
2608 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2609 code in os-type was giving problems when libc.so lives in lib64, like on
2612 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2613 aren't the modern standard, and it seems that some systems' include files
2614 don't always have them. Exim was already checking for some of the newer
2615 ones like T_AAAA, and defining it itself. I've added checks for all the
2616 record types that Exim uses.
2618 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2619 not automatically generating a new one, as it is supposed to. This
2620 prevented TLS from working. If the file did exist, but contained invalid
2621 data, a new version was generated, as expected. It was only the case of a
2622 non-existent file that was broken.
2624 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2625 with a change in libdomainkeys > 0.64.
2627 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2628 from DNS. If the selector record carries the flag, it now has
2629 precedence over the domain-wide flag.
2631 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2633 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2634 the use of a port name that isn't defined in /etc/services) occurred, the
2635 message was deferred as in a normal delivery, and thus remained on the
2636 spool, instead of being failed because of the mua_wrapper setting. This
2637 is now fixed, and I tidied up some of the mua_wrapper messages at the
2640 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2641 the messages in a hash of arrays rather than using individual hashes.
2642 This is a bit cleaner and results in dramatic memory savings, albeit
2643 at a slight CPU cost.
2645 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2646 as requested by Marc Sherman.
2648 SC/10 Eximstats: added histograms for user specified patterns as requested
2651 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2653 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2654 fopen() in the content-scanning modules that did not already have it.
2660 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2661 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2663 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2665 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2667 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2668 to test Sieve filters that use "vacation".
2670 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2671 that changes the way the GnuTLS parameters are stored in the cache file.
2672 The new format can be generated externally. For backward compatibility,
2673 if the data in the cache doesn't make sense, Exim assumes it has read an
2674 old-format file, and it generates new data and writes a new file. This
2675 means that you can't go back to an older release without removing the
2678 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2679 work if there are any delivery delays because "one_time" forces the
2680 parent to be marked "delivered", so its unseen clone is never tried
2681 again. For this reason, Exim now forbids the simultaneous setting of
2684 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2685 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2686 entry if you want to know the details. The fix, however, neglected to
2687 consider the case when local delivery batching is involved. The test for
2688 "previously delivered" was not happening when checking to see if an
2689 address could be batched with a previous (undelivered) one; under
2690 certain circumstances this could lead to multiple deliveries to the same
2693 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2694 in its include files, and this causes problems building Exim.
2696 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2697 header_syntax) but Exim was just ignoring anything given after a slash.
2698 In particular, this caused confusion with an attempt to use "verify =
2699 reverse_host_lookup/defer_ok". An error is now given when options are
2700 supplied for verify items that do not have them. (Maybe reverse_host_
2701 lookup should have a defer_ok option, but that's a different point.)
2703 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2704 defined by RFC 821) to 2048, because there were problems with some AUTH
2705 commands, and RFC 1869 says the size should be increased for extended
2706 SMTP commands that take arguments.
2708 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2711 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2712 "unknown" error; now it says that the functionality isn't in the binary.
2714 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2715 an address' error message when a string expansion fails (syntax or
2716 whatever). Otherwise the password may appear in the log. Following change
2717 PH/42 below, there is no longer a chance of it appearing in a bounce
2720 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2722 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2723 of its addresses was ever tried. (Bugzilla bug #2.)
2725 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2726 the result incorrectly in the debug output. (It correctly added a newline
2727 to what was transported.)
2729 TF/01 Added $received_time.
2731 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2732 commented out examples of how to interface to a virus scanner and to
2733 SpamAssassin. Also added commented examples of av_scanner and
2734 spamd_address settings.
2736 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2737 and controls are allowed in which ACLs. There were a couple of minor
2738 errors. Some of the entries in the conditions table (which is a table of
2739 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2740 negation of where the condition IS allowed.
2742 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2744 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2745 header file does not have a version number, so I've had to invent a new
2746 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2747 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2748 radiusclient), but it was contributed by a Radius user.
2750 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2751 files or directories, for OpenSSL.
2753 PH/19 When an Exim process that is running as root has to create an Exim log
2754 file, it does so in a subprocess that runs as exim:exim so as to get the
2755 ownership right at creation (otherwise, other Exim processes might see
2756 the file with the wrong ownership). There was no test for failure of this
2757 fork() call, which would lead to the process getting stuck as it waited
2758 for a non-existent subprocess. Forks do occasionally fail when resources
2759 run out. I reviewed all the other calls to fork(); they all seem to check
2762 PH/20 When checking for unexpected SMTP input at connect time (before writing
2763 the banner), Exim was not dealing correctly with a non-positive return
2764 from the read() function. If the client had disconnected by this time,
2765 the result was a log entry for a synchronization error with an empty
2766 string after "input=" when read() returned zero. If read() returned -1
2767 (an event I could not check), uninitialized data bytes were printed.
2768 There were reports of junk text (parts of files, etc) appearing after
2771 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2773 PH/22 Added support for macro redefinition, and (re)definition in between
2774 driver and ACL definitions.
2776 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2777 forgetting to use the resulting value; it was using the unexpanded value.
2779 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2780 hadn't been configured. The fix is from Juergen Kreileder, who
2781 understands it better than I do:
2783 "Here's what I see happening with three configured cyrus_sasl
2784 authenticators configured (plain, login, cram-md5):
2786 On startup auth_cyrus_sasl_init() gets called for each of these.
2787 This means three calls to sasl_listmech() without a specified mech_list.
2788 => SASL tests which mechs of all available mechs actually work
2789 => three warnings about OTP not working
2790 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2792 With the patch, sasl_listmech() also gets called three times. But now
2793 SASL's mech_list option is set to the server_mech specified in the the
2794 authenticator. Or in other words, the answer from sasl_listmech()
2795 gets limited to just the mech you're testing for (which is different
2797 => the return list contains just 'plain' or 'login', 'cram-md5' or
2798 nothing depending on the value of ob->server_mech.
2800 I've just tested the patch: Authentication still works fine,
2801 unavailable mechs specified in the exim configuration are still
2802 caught, and the auth.log warnings about OTP are gone."
2804 PH/25 When debugging is enabled, the contents of the command line are added
2805 to the debugging output, even when log_selector=+arguments is not
2808 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2809 answer is "GNU", and only if the return is "GNU/something" is the answer
2812 PH/27 $acl_verify_message is now set immediately after the failure of a
2813 verification in an ACL, and so is available in subsequent modifiers. In
2814 particular, the message can be preserved by coding like this:
2816 warn !verify = sender
2817 set acl_m0 = $acl_verify_message
2819 Previously, $acl_verify_message was set only while expanding "message"
2820 and "log_message" when a very denied access.
2822 PH/28 Modified OS/os.c-Linux with
2824 -#ifndef OS_LOAD_AVERAGE
2825 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2827 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2828 nomenclature these days.)
2830 PH/29 Installed patch from the Sieve maintainer that adds the options
2831 sieve_useraddress and sieve_subaddress to the redirect router.
2833 PH/30 In these circumstances:
2834 . Two addresses routed to the same list of hosts;
2835 . First host does not offer TLS;
2836 . First host accepts first address;
2837 . First host gives temporary error to second address;
2838 . Second host offers TLS and a TLS session is established;
2839 . Second host accepts second address.
2840 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2841 and peerdn, if requested) that were in fact used only for the second
2844 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2845 attention to any local part prefix or suffix that was matched by the
2846 router that accepted the address. It now behaves in the same way as it
2847 does for delivery: the affixes are removed from the local part unless
2848 rcpt_include_affixes is set on the transport.
2850 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2851 timeout during the DATA phase of an incoming message.
2853 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2854 applied a patch sanctioned by the Sieve maintainer.
2856 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2857 the uid or gid is negative. A case of a negative gid caused this to be
2858 noticed. The fix allows for either to be negative.
2860 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2861 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2864 PH/36 The change PH/12 above was broken. Fixed it.
2866 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2867 the grounds that routing the same address twice would always produce the
2868 same answer. This might have been true once, but it is certainly no
2869 longer true now. Routing a child address may depend on the previous
2870 routing that produced that child. Some complicated redirection strategies
2871 went wrong when messages had multiple recipients, and made Exim's
2872 behaviour dependent on the order in which the addresses were given.
2874 I have moved the duplicate checking until after the routing is complete.
2875 Exim scans the addresses that are assigned to local and remote
2876 transports, and removes any duplicates. This means that more work will be
2877 done, as duplicates will always all be routed, but duplicates are
2878 presumably rare, so I don't expect this is of any significance.
2880 For deliveries to pipes, files, and autoreplies, the duplicate checking
2881 still happens during the routing process, since they are not going to be
2884 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2885 It corrects a timeout issue with spamd. This is Ian's comment: "The
2886 background is that sometimes spamd either never reads data from a
2887 connection it has accepted, or it never writes response data. The exiscan
2888 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2889 blindly assumes that writes won't block so it may never time out."
2891 PH/39 Allow G after quota size as well as K and M.
2893 PH/40 The value set for $authenticated_id in an authenticator may not contain
2894 binary zeroes or newlines because the value is written to log lines and
2895 to spool files. There was no check on this. Now the value is run through
2896 the string_printing() function so that such characters are converted to
2897 printable escape sequences.
2899 PH/41 $message_linecount is a new variable that contains the total number of
2900 lines in the message. Compare $body_linecount, which is the count for the
2903 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2904 bounce and delay warning messages, except in certain special cases, which
2907 (a) An SMTP error message from a remote host;
2908 (b) A message specified in a :fail: redirection;
2909 (c) A message specified in a "fail" command in a system filter;
2910 (d) A message specified in a FAIL return from the queryprogram router;
2911 (e) A message specified by the cannot_route_message router option.
2913 In these cases only, Exim does include the error details in bounce and
2914 warning messages. There are also a few cases where bland messages such
2915 as "unrouteable address" or "local delivery error" are given.
2917 PH/43 $value is now also set for the "else" part of a ${run expansion.
2919 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2920 being worked on, but at least Exim now implements the latest version to
2923 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2924 process to complete was treated as a delivery failure, a timeout while
2925 writing the message to the pipe was logged, but erroneously treated as a
2926 successful delivery. Such timeouts include transport filter timeouts. For
2927 consistency with the overall process timeout, these timeouts are now
2928 treated as errors, giving rise to delivery failures by default. However,
2929 there is now a new Boolean option for the pipe transport called
2930 timeout_defer, which, if set TRUE, converts the failures into defers for
2931 both kinds of timeout. A transport filter timeout is now identified in
2934 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2935 systems where "make" and "gmake" are different, calling "gmake" at top
2936 level broke things. I've arranged for the value of $(MAKE) to be passed
2937 from the Makefile to this script so that it can call the same version of
2941 A note about Exim versions 4.44 and 4.50
2942 ----------------------------------------
2944 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2945 changes of various kinds. As a consequence, a big documentation update was
2946 needed. This delayed the release for rather longer than seemed good, especially
2947 in the light of a couple of (minor) security issues. Therefore, the changes
2948 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2949 release. So 4.44 and 4.50 are in effect two different branches that both start
2952 I have left the 4.50 change log unchanged; it contains all the changes since
2953 4.43. The change log for 4.44 is below; many of its items are identical to
2954 those for 4.50. This seems to be the most sensible way to preserve the
2955 historical information.
2961 1. Minor wording change to the doc/README.SIEVE file.
2963 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2964 computation of the current number of files was incorrect.
2966 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2967 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2970 4. Give more explanation in the error message when the command for a transport
2971 filter fails to execute.
2973 5. There are several places where Exim runs a non-Exim command in a
2974 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2975 was being done only for the command run by the queryprogram router. It is
2976 now done for all such subprocesses. The other cases are: ${run, transport
2977 filters, and the commands run by the lmtp and pipe transports.
2979 6. Added CONFIGURE_GROUP build-time option.
2981 7. Some older OS have a limit of 256 on the maximum number of file
2982 descriptors. Exim was using setrlimit() to set 1000 as a large value
2983 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2984 systems. I've change it so that if it can't get 1000, it tries for 256.
2986 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2987 was an oversight, and furthermore, ever since the addition of extra
2988 controls (e.g. 4.43/32), the checks on when to allow different forms of
2989 "control" were broken. There should now be diagnostics for all cases when a
2990 control that does not make sense is encountered.
2992 9. Added the /retain_sender option to "control=submission".
2994 10. $recipients is now available in the predata ACL (oversight).
2996 11. Tidy the search cache before the fork to do a delivery from a message
2997 received from the command line. Otherwise the child will trigger a lookup
2998 failure and thereby defer the delivery if it tries to use (for example) a
2999 cached ldap connection that the parent has called unbind on.
3001 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3002 of $address_data from the recipient verification was clobbered by the
3003 sender verification.
3005 13. The value of address_data from a sender verification is now available in
3006 $sender_address_data in subsequent conditions in the ACL statement.
3008 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3010 15. Added a new option "connect=<time>" to callout options, to set a different
3013 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3014 was its contents. (It was OK if the option was not defined at all.)
3016 17. A "Completed" log line is now written for messages that are removed from
3017 the spool by the -Mrm option.
3019 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3020 information about exactly what failed.
3022 19. Added -dd to debug only the daemon process.
3024 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3025 handles timeouts, both on the server side and network timeouts. Renamed the
3026 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3028 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3029 It is now set to "smtps".
3031 22. $host_address is now set to the target address during the checking of
3032 ignore_target_hosts.
3034 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3035 being passed; this would have caused $sender_host_name to have been used if
3036 matching the list had actually called for a host name (not very likely,
3037 since this list is usually IP addresses). A host name is now passed as
3040 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3041 code that specifies a non-restarting handler (typically sigaction() in
3042 modern systems) in an attempt to fix a rare and obscure crash bug.
3044 25. Narrowed the window for a race in the daemon that could cause it to ignore
3045 SIGCHLD signals. This is not a major problem, because they are used only to
3046 wake it up if nothing else does.
3048 26. A malformed maildirsize file could cause Exim to calculate negative values
3049 for the mailbox size or file count. Odd effects could occur as a result.
3050 The maildirsize information is now recalculated if the size or filecount
3053 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3054 support for a long time. Removed HAVE_SYS_VFS_H.
3056 28. Installed the latest version of exipick from John Jetmore.
3058 29. In an address list, if the pattern was not a regular expression, an empty
3059 subject address (from a bounce message) matched only if the pattern was an
3060 empty string. Non-empty patterns were not even tested. This was the wrong
3061 because it is perfectly reasonable to use an empty address as part of a
3062 database query. An empty address is now tested by patterns that are
3063 lookups. However, all the other forms of pattern expect the subject to
3064 contain a local part and a domain, and therefore, for them, an empty
3065 address still always fails if the pattern is not itself empty.
3067 30. Exim went into a mad DNS loop when attempting to do a callout where the
3068 host was specified on an smtp transport, and looking it up yielded more
3069 than one IP address.
3071 31. Re-factored the code for checking spool and log partition space into a
3072 function that finds that data and another that does the check. The former
3073 is then used to implement four new variables: $spool_space, $log_space,
3074 $spool_inodes, and $log_inodes.
3076 32. The RFC2047 encoding function was originally intended for short strings
3077 such as real names; it was not keeping to the 75-character limit for
3078 encoded words that the RFC imposes. It now respects the limit, and
3079 generates multiple encoded words if necessary. To be on the safe side, I
3080 have increased the buffer size for the ${rfc2047: expansion operator from
3083 33. It is now permitted to omit both strings after an "if" condition; if the
3084 condition is true, the result is "true". As before, when the second string
3085 is omitted, a false condition yields an empty string. This makes it less
3086 cumbersome to write custom ACL and router conditions.
3088 34. Failure to deliver a bounce message always caused it to be frozen, even if
3089 there was an errors_to setting on the router. The errors_to setting is now
3092 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3093 canonical form (fully expanded) before being placed in
3094 $sender_host_address.
3096 36. The table in the code that translates DNS record types into text (T_A to
3097 "A" for instance) was missing entries for NS and CNAME. It is just possible
3098 that this could have caused confusion if both these types were looked up
3099 for the same domain, because the text type is used as part of Exim's
3100 per-process caching. But the chance of anyone hitting this buglet seems
3103 37. The dnsdb lookup has been extended in a number of ways.
3105 (1) There is a new type, "zns", which walks up the domain tree until it
3106 finds some nameserver records. It should be used with care.
3108 (2) There is a new type, "mxh", which is like "mx" except that it returns
3109 just the host names, not the priorities.
3111 (3) It is now possible to give a list of domains (or IP addresses) to be
3112 looked up. The behaviour when one of the lookups defers can be
3113 controlled by a keyword.
3115 (4) It is now possible to specify the separator character for use when
3116 multiple records are returned.
3118 38. The dnslists ACL condition has been extended: it is now possible to supply
3119 a list of IP addresses and/or domains to be looked up in a particular DNS
3122 39. Added log_selector=+queue_time_overall.
3124 40. When running the queue in the test harness, wait just a tad after forking a
3125 delivery process, to get repeatability of debugging output.
3127 41. Include certificate and key file names in error message when GnuTLS fails
3128 to set them up, because the GnuTLS error message doesn't include the name
3129 of the failing file when there is a problem reading it.
3131 42. Allow both -bf and -bF in the same test run.
3133 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3135 44. The "Exiscan patch" is now merged into the mainline Exim source.
3137 45. Sometimes the final signoff response after QUIT could fail to get
3138 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3139 < 0 before doing a fflush(). This bug looks as though it goes back to the
3140 introduction of TLS in release 3.20, but "sometimes" must have been rare
3141 because the tests only now provoked it.
3143 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3144 (this can affect the format of dates).
3146 47. exim_tidydb, when checking for the continued existence of a message for
3147 which it has found a message-specific retry record, was not finding
3148 messages that were in split spool directories. Consequently, it was
3149 deleting retry records that should have stayed in existence.
3151 48. Steve fixed some bugs in eximstats.
3153 49. The SPA authentication driver was not abandoning authentication and moving
3154 on to the next authenticator when an expansion was forced to fail,
3155 contradicting the general specification for all authenticators. Instead it
3156 was generating a temporary error. It now behaves as specified.
3158 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3159 (the order specifies the preference for clients). The order is now AES256,
3160 AES128, 3DES, ARCFOUR128.
3162 51. Small patch to Sieve code - explicitly set From: when generating an
3165 52. Exim crashed if a remote delivery caused a very long error message to be
3166 recorded - for instance if somebody sent an entire SpamAssassin report back
3167 as a large number of 550 error lines. This bug was coincidentally fixed by
3168 increasing the size of one of Exim's internal buffers (big_buffer) that
3169 happened as part of the Exiscan merge. However, to be on the safe side, I
3170 have made the code more robust (and fixed the comments that describe what
3173 53. Now that there can be additional text after "Completed" in log lines (if
3174 the queue_time_overall log selector is set), a one-byte patch to exigrep
3175 was needed to allow it to recognize "Completed" as not the last thing in
3178 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3179 patch that reportedly fixes this has been added. I am not expert enough to
3180 create a test for it. This is what the patch creator wrote:
3182 "I found a little strange behaviour of ldap code when working with
3183 Windows 2003 AD Domain, where users was placed in more than one
3184 Organization Units. When I tried to give exim partial DN, the exit code
3185 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3186 But simultaneously result of request was absolutely normal ldap result,
3187 so I produce this patch..."
3189 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3190 REFERENCE, so I have modified the code to exclude the patch when that macro
3193 55. Some experimental protocols are using DNS PTR records for new purposes. The
3194 keys for these records are domain names, not reversed IP addresses. The
3195 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3196 leaves it alone. Component reversal etc. now happens only for IP addresses.
3199 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3201 57. Double the size of the debug message buffer (to 2048) so that more of very
3202 long debug lines gets shown.
3204 58. The exicyclog utility now does better if the number of log files to keep
3205 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3207 59. Two changes related to the smtp_active_hostname option:
3209 (1) $smtp_active_hostname is now available as a variable.
3210 (2) The default for smtp_banner uses $smtp_active_hostname instead
3211 of $primary_hostname.
3213 60. The host_aton() function is supposed to be passed a string that is known
3214 to be a valid IP address. However, in the case of IPv6 addresses, it was
3215 not checking this. This is a hostage to fortune. Exim now panics and dies
3216 if the condition is not met. A case was found where this could be provoked
3217 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3218 components; fortuitously, this particular loophole had already been fixed
3219 by change 4.50/55 above.
3221 If there are any other similar loopholes, the new check in host_aton()
3222 itself should stop them being exploited. The report I received stated that
3223 data on the command line could provoke the exploit when Exim was running as
3224 exim, but did not say which command line option was involved. All I could
3225 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3226 running as the user.
3229 61. There was a buffer overflow vulnerability in the SPA authentication code
3230 (which came originally from the Samba project). I have added a test to the
3231 spa_base64_to_bits() function which I hope fixes it.
3234 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3235 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3237 63. The daemon start-up calls getloadavg() while still root for those OS that
3238 need the first call to be done as root, but it missed one case: when
3239 deliver_queue_load_max is set with deliver_drop_privilege. This is
3240 necessary for the benefit of the queue runner, because there is no re-exec
3241 when deliver_drop_privilege is set.
3243 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3244 This has been fixed.
3246 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3247 was in use, was not putting the data itself into the right store pool;
3248 consequently, it could be overwritten for a subsequent message in the same
3249 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3252 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3254 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3255 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3256 the function were treating the return as a boolean value, which happened to
3257 work because 0=false and not-0=true, but is not correct code.
3259 68. The host_aton() function was not handling scoped IPv6 addresses (those
3260 with, for example, "%eth0" on the end) correctly.
3262 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3263 negated items (that is, ~something) in unsigned ints. Some compilers
3264 apparently mutter when there is no cast.
3266 70. If an address verification called from an ACL failed, and did not produce a
3267 user-specific message (i.e. there was only a "system" message), nothing was
3268 put in $acl_verify_message. In this situation, it now puts the system
3271 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3272 session; change 4.31/43 added the unwanted input to the log line - except
3273 that it did not do this in the start of session case. It now does.
3275 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3276 This is wrong and can cause the other end to generate a synchronization
3277 error if it is another Exim or anything else that does the synchronization
3278 check. A QUIT command is no longer sent after a timeout.
3280 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3281 during host lookups.
3283 74. The defer_ok option of callout verification was not working if it was used
3284 when verifying addresses in header lines, that is, for this case:
3286 verify = header_sender/callout=defer_ok
3288 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3289 those file descriptors could be used for SMTP connections. If anything
3290 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3291 could be sent to the SMTP client, causing chaos. The daemon now opens
3292 stdin, stdout, and stderr to /dev/null when it puts itself into the
3295 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3296 log by default. The user can override this with suitable Perl magic.
3298 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3299 the log message when discard triggers, was not working for the DATA ACL or
3300 for the non-SMTP ACL.
3302 78. Error message wording change in sieve.c.
3304 79. If smtp_accept_max_per_host was set, the number of connections could be
3305 restricted to fewer than expected, because the daemon was trying to set up
3306 a new connection before checking whether the processes handling previous
3307 connections had finished. The check for completed processes is now done
3308 earlier. On busy systems, this bug wouldn't be noticed because something
3309 else would have woken the daemon, and it would have reaped the completed
3312 80. If a message was submitted locally by a user whose login name contained one
3313 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3314 It caused a spool format error. I have fixed the spool reading code. A
3315 related problem was that the "from" clause in the Received: line became
3316 illegal because of the space(s). It is now covered by ${quote_local_part.
3318 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3321 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3323 83. Patch from Sieve maintainer to fix unterminated string problem in
3324 "vacation" handling.
3326 84. Some minor changes to the Linux configuration files to help with other
3327 OS variants using glibc.
3329 85. One more patch for Sieve to update vacation handling to latest spec.
3332 ----------------------------------------------------
3333 See the note above about the 4.44 and 4.50 releases.
3334 ----------------------------------------------------
3340 1. Change 4.43/35 introduced a bug that caused file counts to be
3341 incorrectly computed when quota_filecount was set in an appendfile
3344 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3345 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3348 3. Give more explanation in the error message when the command for a transport
3349 filter fails to execute.
3351 4. There are several places where Exim runs a non-Exim command in a
3352 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3353 was being done only for the command run by the queryprogram router. It is
3354 now done for all such subprocesses. The other cases are: ${run, transport
3355 filters, and the commands run by the lmtp and pipe transports.
3357 5. Some older OS have a limit of 256 on the maximum number of file
3358 descriptors. Exim was using setrlimit() to set 1000 as a large value
3359 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3360 systems. I've change it so that if it can't get 1000, it tries for 256.
3362 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3363 was an oversight, and furthermore, ever since the addition of extra
3364 controls (e.g. 4.43/32), the checks on when to allow different forms of
3365 "control" were broken. There should now be diagnostics for all cases when a
3366 control that does not make sense is encountered.
3368 7. $recipients is now available in the predata ACL (oversight).
3370 8. Tidy the search cache before the fork to do a delivery from a message
3371 received from the command line. Otherwise the child will trigger a lookup
3372 failure and thereby defer the delivery if it tries to use (for example) a
3373 cached ldap connection that the parent has called unbind on.
3375 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3376 of $address_data from the recipient verification was clobbered by the
3377 sender verification.
3379 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3380 was its contents. (It was OK if the option was not defined at all.)
3382 11. A "Completed" log line is now written for messages that are removed from
3383 the spool by the -Mrm option.
3385 12. $host_address is now set to the target address during the checking of
3386 ignore_target_hosts.
3388 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3389 being passed; this would have caused $sender_host_name to have been used if
3390 matching the list had actually called for a host name (not very likely,
3391 since this list is usually IP addresses). A host name is now passed as
3394 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3395 code that specifies a non-restarting handler (typically sigaction() in
3396 modern systems) in an attempt to fix a rare and obscure crash bug.
3398 15. Narrowed the window for a race in the daemon that could cause it to ignore
3399 SIGCHLD signals. This is not a major problem, because they are used only to
3400 wake it up if nothing else does.
3402 16. A malformed maildirsize file could cause Exim to calculate negative values
3403 for the mailbox size or file count. Odd effects could occur as a result.
3404 The maildirsize information is now recalculated if the size or filecount
3407 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3408 support for a long time. Removed HAVE_SYS_VFS_H.
3410 18. Updated exipick to current release from John Jetmore.
3412 19. Allow an empty sender to be matched against a lookup in an address list.
3413 Previously the only cases considered were a regular expression, or an
3416 20. Exim went into a mad DNS lookup loop when doing a callout where the
3417 host was specified on the transport, if the DNS lookup yielded more than
3420 21. The RFC2047 encoding function was originally intended for short strings
3421 such as real names; it was not keeping to the 75-character limit for
3422 encoded words that the RFC imposes. It now respects the limit, and
3423 generates multiple encoded words if necessary. To be on the safe side, I
3424 have increased the buffer size for the ${rfc2047: expansion operator from
3427 22. Failure to deliver a bounce message always caused it to be frozen, even if
3428 there was an errors_to setting on the router. The errors_to setting is now
3431 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3432 canonical form (fully expanded) before being placed in
3433 $sender_host_address.
3435 24. Updated eximstats to version 1.33
3437 25. Include certificate and key file names in error message when GnuTLS fails
3438 to set them up, because the GnuTLS error message doesn't include the name
3439 of the failing file when there is a problem reading it.
3441 26. Expand error message when OpenSSL has problems setting up cert/key files.
3444 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3445 (this can affect the format of dates).
3447 28. exim_tidydb, when checking for the continued existence of a message for
3448 which it has found a message-specific retry record, was not finding
3449 messages that were in split spool directories. Consequently, it was
3450 deleting retry records that should have stayed in existence.
3452 29. eximstats updated to version 1.35
3453 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3454 1.35 - bugfix such that pie charts by volume are generated correctly
3456 30. The SPA authentication driver was not abandoning authentication and moving
3457 on to the next authenticator when an expansion was forced to fail,
3458 contradicting the general specification for all authenticators. Instead it
3459 was generating a temporary error. It now behaves as specified.
3461 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3462 (the order specifies the preference for clients). The order is now AES256,
3463 AES128, 3DES, ARCFOUR128.
3465 31. Small patch to Sieve code - explicitly set From: when generating an
3468 32. Exim crashed if a remote delivery caused a very long error message to be
3469 recorded - for instance if somebody sent an entire SpamAssassin report back
3470 as a large number of 550 error lines. This bug was coincidentally fixed by
3471 increasing the size of one of Exim's internal buffers (big_buffer) that
3472 happened as part of the Exiscan merge. However, to be on the safe side, I
3473 have made the code more robust (and fixed the comments that describe what
3476 33. Some experimental protocols are using DNS PTR records for new purposes. The
3477 keys for these records are domain names, not reversed IP addresses. The
3478 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3479 leaves it alone. Component reversal etc. now happens only for IP addresses.
3482 34. The host_aton() function is supposed to be passed a string that is known
3483 to be a valid IP address. However, in the case of IPv6 addresses, it was
3484 not checking this. This is a hostage to fortune. Exim now panics and dies
3485 if the condition is not met. A case was found where this could be provoked
3486 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3487 components; fortuitously, this particular loophole had already been fixed
3488 by change 4.50/55 or 4.44/33 above.
3490 If there are any other similar loopholes, the new check in host_aton()
3491 itself should stop them being exploited. The report I received stated that
3492 data on the command line could provoke the exploit when Exim was running as
3493 exim, but did not say which command line option was involved. All I could
3494 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3495 running as the user.
3498 35. There was a buffer overflow vulnerability in the SPA authentication code
3499 (which came originally from the Samba project). I have added a test to the
3500 spa_base64_to_bits() function which I hope fixes it.
3503 36. The daemon start-up calls getloadavg() while still root for those OS that
3504 need the first call to be done as root, but it missed one case: when
3505 deliver_queue_load_max is set with deliver_drop_privilege. This is
3506 necessary for the benefit of the queue runner, because there is no re-exec
3507 when deliver_drop_privilege is set.
3509 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3510 was in use, was not putting the data itself into the right store pool;
3511 consequently, it could be overwritten for a subsequent message in the same
3512 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3515 38. Sometimes the final signoff response after QUIT could fail to get
3516 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3517 < 0 before doing a fflush(). This bug looks as though it goes back to the
3518 introduction of TLS in release 3.20, but "sometimes" must have been rare
3519 because the tests only now provoked it.
3525 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3526 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3527 Now it returns an integer. A number of calls were still expecting a T/F
3528 return. Fortuitously, in all cases, the tests worked in OK situations,
3529 which is the norm. However, things would have gone wrong on any write
3530 failures on the smtp file descriptor. This function is used when sending
3531 messages over SMTP and also when doing verify callouts.
3533 2. When Exim is called to do synchronous delivery of a locally submitted
3534 message (the -odf or -odi options), it no longer closes stderr before doing
3537 3. Implemented the mua_wrapper option.
3539 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3541 5. Implemented the functions header_remove(), header_testname(),
3542 header_add_at_position(), and receive_remove_recipient(), and exported them
3545 6. If an ACL "warn" statement specified the addition of headers, Exim already
3546 inserted X-ACL-Warn: at the start if there was no header name. However, it
3547 was not making this test for the second and subsequent header lines if
3548 there were newlines in the string. This meant that an invalid header could
3549 be inserted if Exim was badly configured.
3551 7. Allow an ACL "warn" statement to add header lines at the start or after all
3552 the Received: headers, as well as at the end.
3554 8. Added the rcpt_4xx retry error code.
3556 9. Added postmaster_mailfrom=xxx to callout verification option.
3558 10. Added mailfrom=xxxx to the callout verification option, for verify=
3561 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3562 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3564 12. Inserted some casts to stop certain compilers warning when using pointer
3565 differences as field lengths or precisions in printf-type calls (mostly
3566 affecting debugging statements).
3568 13. Added optional readline() support for -be (dynamically loaded).
3570 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3571 same clock tick as a message's arrival, so that its received time was the
3572 same as the "first fail" time on the retry record, and that message
3573 remained on the queue past the ultimate address timeout, every queue runner
3574 would try a delivery (because it was past the ultimate address timeout) but
3575 after another failure, the ultimate address timeout, which should have then
3576 bounced the address, did not kick in. This was a "< instead of <=" error;
3577 in most cases the first failure would have been in the next clock tick
3578 after the received time, and all would be well.
3580 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3581 being recognized when the domain list was tested by the match_domain
3582 condition in an expansion string.
3584 16. Added the ${str2b64: operator.
3586 17. Exim was always calling setrlimit() to set a large limit for the number of
3587 processes, without checking whether the existing limit was already
3588 adequate. (It did check for the limit on file descriptors.) Furthermore,
3589 errors from getrlimit() and setrlimit() were being ignored. Now they are
3590 logged to the main and panic logs, but Exim does carry on, to try to do its
3591 job under whatever limits there are.
3593 18. Imported PCRE 5.0.
3595 19. Trivial typo in log message " temporarily refused connection" (the leading
3598 20. If the log selector return_path_on_delivery was set and an address was
3599 redirected to /dev/null, the delivery process crashed because it assumed
3600 that a return path would always be set for a "successful" delivery. In this
3601 case, the whole delivery is bypassed as an optimization, and therefore no
3604 21. Internal re-arrangement: the function for sending a challenge and reading
3605 a response while authentication was assuming a zero-terminated challenge
3606 string. It's now changed to take a pointer and a length, to allow for
3607 binary data in such strings.
3609 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3611 23. Exim was not respecting finduser_retries when seeking the login of the
3612 uid under which it was called; it was always trying 10 times. (The default
3613 setting of finduser_retries is zero.) Also, it was sleeping after the final
3614 failure, which is pointless.
3616 24. Implemented tls_on_connect_ports.
3618 25. Implemented acl_smtp_predata.
3620 26. If the domain in control=submission is set empty, Exim assumes that the
3621 authenticated id is a complete email address when it generates From: or
3622 Sender: header lines.
3624 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3625 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3626 chown and chgrp in /bin and hostname in /usr/bin.
3628 28. Exim was keeping the "process log" file open after each use, just as it
3629 does for the main log. This opens the possibility of it remaining open for
3630 long periods when the USR1 signal hits a daemon. Occasional processlog
3631 errors were reported, that could have been caused by this. Anyway, it seems
3632 much more sensible not to leave this file open at all, so that is what now
3635 29. The long-running daemon process does not normally write to the log once it
3636 has entered its main loop, and it closes the log before doing so. This is
3637 so that log files can straightforwardly be renamed and moved. However,
3638 there are a couple of unusual error situations where the daemon does write
3639 log entries, and I had neglected to close the log afterwards.
3641 30. The text of an SMTP error response that was received during a remote
3642 delivery was being truncated at 512 bytes. This is too short for some of
3643 the long messages that one sometimes sees. I've increased the limit to
3646 31. It is now possible to make retry rules that apply only when a message has a
3647 specific sender, in particular, an empty sender.
3649 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3650 it possible to be selective about when SMTP synchronization is enforced.
3652 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3654 32. Implemented hosts_connection_nolog.
3656 33. Added an ACL for QUIT.
3658 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3661 35. Added mailbox_size and mailbox_filecount to appendfile.
3663 36. Added control = no_multiline_responses to ACLs.
3665 37. There was a bug in the logic of the code that waits for the clock to tick
3666 in the case where the clock went backwards by a substantial amount such
3667 that the microsecond fraction of "now" was more than the microsecond
3668 fraction of "then" (but the whole seconds number was less).
3670 38. Added support for the libradius Radius client library this is found on
3671 FreeBSD (previously only the radiusclient library was supported).
3677 1. When certain lookups returned multiple values in the form name=value, the
3678 quoting of the values was not always being done properly. Specifically:
3679 (a) If the value started with a double quote, but contained no whitespace,
3681 (b) If the value contained whitespace other than a space character (i.e.
3682 tabs or newlines or carriage returns) it was not quoted.
3683 This fix has been applied to the mysql and pgsql lookups by writing a
3684 separate quoting function and calling it from the lookup code. The fix
3685 should probably also be applied to nisplus, ibase and oracle lookups, but
3686 since I cannot test any of those, I have not disturbed their existing code.
3688 2. A hit in the callout cache for a specific address caused a log line with no
3689 reason for rejecting RCPT. Now it says "Previous (cached) callout
3690 verification failure".
3692 3. There was an off-by-one bug in the queryprogram router. An over-long
3693 return line was truncated at 256 instead of 255 characters, thereby
3694 overflowing its buffer with the terminating zero. As well as fixing this, I
3695 have increased the buffer size to 1024 (and made a note to document this).
3697 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3698 when Exim is waiting for an SMTP response from a remote server, Exim
3699 restarts its select() call on the socket, thereby resetting its timeout.
3700 This is not a problem when such interrupts are rare. Somebody set up a cron
3701 job to run exiwhat every 2 minutes, which is less than the normal select()
3702 timeout (5 or 10 minutes). This meant that the select() timeout never
3703 kicked in because it was always reset. I have fixed this by comparing the
3704 time when an interrupt arrives with the time at the start of the first call
3705 to select(). If more time than the timeout has elapsed, the interrupt is
3706 treated as a timeout.
3708 5. Some internal re-factoring in preparation for the addition of Sieve
3709 extensions (by MH). In particular, the "personal" test is moved to a
3710 separate function, and given an option for scanning Cc: and Bcc: (which is
3711 not set for Exim filters).
3713 6. When Exim created an email address using the login of the caller as the
3714 local part (e.g. when creating a From: or Sender: header line), it was not
3715 quoting the local part when it contained special characters such as @.
3717 7. Installed new OpenBSD configuration files.
3719 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3720 try to make them clearer.
3722 9. Callout options, other than the timeout value, were being ignored when
3723 verifying sender addresses in header lines. For example, when using
3725 verify = header_sender/callout=no_cache
3727 the cache was (incorrectly) being used.
3729 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3730 only the Cygwin environment.
3732 11. When return_path_on_delivery was set as a log selector, if different remote
3733 addresses in the same message used different return paths and parallel
3734 remote delivery occurred, the wrong values would sometimes be logged.
3735 (Whenever a remote delivery process finished, the return path value from
3736 the most recently started remote delivery process was logged.)
3738 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3739 lines when AUTH and/or TLS are in use. This is the "received protocol"
3740 field. Exim used to use "asmtp" for authenticated SMTP, without any
3741 indication (in the protocol name) for TLS use. Now it follows the RFC and
3742 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3743 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3744 names appear in log lines as well as in Received: header lines.
3746 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3747 extensions, and comparison tests, and to fix some bugs.
3749 14. Changes to the "personal" filter test:
3751 (1) The test was buggy in that it was just doing the equivalent of
3752 "contains" tests on header lines. For example, if a user's address was
3753 anne@some.where, the "personal" test would incorrectly be true for
3755 To: susanne@some.where
3757 This test is now done by extracting each address from the header in turn,
3758 and checking the entire address. Other tests that are part of "personal"
3759 are now done using regular expressions (for example, to check local parts
3760 of addresses in From: header lines).
3762 (2) The list of non-personal local parts in From: addresses has been
3763 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3764 taken from the Sieve specification recommendations.
3766 (3) If the message contains any header line starting with "List-" it is
3767 treated as non-personal.
3769 (4) The test for "circular" in the Subject: header line has been removed
3770 because it now seems ill-conceived.
3772 15. Minor typos in src/EDITME comments corrected.
3774 16. Installed latest exipick from John Jetmore.
3776 17. If headers_add on a router specified a text string that was too long for
3777 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3778 of string_sprintf() is now avoided.
3780 18. $message_body_size was not set (it was always zero) when running the DATA
3781 ACL and the local_scan() function.
3783 19. For the "mail" command in an Exim filter, no default was being set for
3784 the once_repeat time, causing a random time value to be used if "once" was
3785 specified. (If the value happened to be <= 0, no repeat happened.) The
3786 default is now 0s, meaning "never repeat". The "vacation" command was OK
3787 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3788 (I found it when inspecting the code).
3790 20. There is now an overall timeout for performing a callout verification. It
3791 defaults to 4 times the callout timeout, which applies to individual SMTP
3792 commands during the callout. The overall timeout applies when there is more
3793 than one host that can be tried. The timeout is checked before trying the
3794 next host. This prevents very long delays if there are a large number of
3795 hosts and all are timing out (e.g. when the network connections are timing
3796 out). The value of the overall timeout can be changed by specifying an
3797 additional sub-option for "callout", called "maxwait". For example:
3799 verify = sender/callout=5s,maxwait=20s
3801 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3802 to the end before writing, but this should make it even safer).
3804 22. Exim was forgetting that it had advertised PIPELINING for the second and
3805 subsequent messages on an SMTP connection. It was also not resetting its
3806 memory on STARTTLS and an internal HELO.
3808 23. When Exim logs an SMTP synchronization error within a session, it now
3809 records whether PIPELINING has been advertised or not.
3811 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3812 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3813 rather than long int.
3815 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3817 26. Added the never_mail option to autoreply.
3823 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3824 crash if the getsockname() call failed; this can happen if a connection is
3825 closed very soon after it is established. The problem was simply in the
3826 order in which certain operations were done, causing Exim to try to write
3827 to the SMTP stream before it had set up the file descriptor. The bug has
3828 been fixed by making things happen in the correct order.
3834 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3835 before the connection was closed, thus losing the rejection response.
3837 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3838 some early Solaris releases, but causes trouble in current releases where
3839 socklen_t is defined.
3841 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3844 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3847 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3848 that releasing the top of it at the end releases what was used for sub-
3849 expansions (unless the block got too big). However, discard this block if
3850 the first thing is a variable or header, so that we can use its block when
3851 it is dynamic (useful for very large $message_headers, for example).
3853 6. Lookups now cache *every* query, not just the most recent. A new, separate
3854 store pool is used for this. It can be recovered when all lookup caches are
3855 flushed. Lookups now release memory at the end of their result strings.
3856 This has involved some general refactoring of the lookup sources.
3858 7. Some code has been added to the store_xxx() functions to reduce the amount
3859 of flapping under certain conditions.
3861 8. log_incoming_interface used to affect only the <= reception log lines. Now
3862 it causes the local interface and port to be added to several more SMTP log
3863 lines, for example "SMTP connection from", and rejection lines.
3865 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3867 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3869 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3870 could be overwritten at the end of the current message (or the start of a
3871 new message if it was set in a HELO ACL). The value is now preserved for
3872 the duration of the SMTP connection.
3874 12. If a transport had a headers_rewrite setting, and a matching header line
3875 contained an unqualified address, that address was qualified, even if it
3876 did not match any rewriting rules. The underlying bug was that the values
3877 of the flags that permit the existence of unqualified sender and recipient
3878 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3879 non-local messages, and by -bnq for local messages) were not being
3880 preserved with the message after it was received.
3882 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3883 "next input=" as part of the text comprising the host identity instead of
3884 the correct text. The code was using the same buffer for two different
3885 strings. However, depending on which order the printing function evaluated
3886 its arguments, the bug did not always show up. Under Linux, for example, my
3887 test suite worked just fine.
3889 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3890 doesn't work with some older versions of Perl. It has been changed to "my",
3891 which in any case is probably the better facility to use.
3893 15. A really picky compiler found some instances of statements for creating
3894 error messages that either had too many or two few arguments for the format
3897 16. The size of the buffer for calls to the DNS resolver has been increased
3898 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3899 for addresses that have a lot of PTR records. This alleviates a problem; it
3900 does not fully solve it.
3902 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3903 buffer now truncates the list and logs the incident, which is the same
3904 action as happens when Exim is looking up a host name and its aliases.
3905 Previously in this situation something unpredictable would happen;
3906 sometimes it was "internal error: store_reset failed".
3908 18. If a server dropped the connection unexpectedly when an Exim client was
3909 using GnuTLS and trying to read a response, the client delivery process
3910 crashed while trying to generate an error log message.
3912 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3913 string, for example:
3915 warn message = H1: something\nH2: something
3917 the text was added as a single header line from Exim's point of view
3918 though it ended up OK in the delivered message. However, searching for the
3919 second and subsequent header lines using $h_h2: did not work. This has been
3920 fixed. Similarly, if a system filter added multiple headers in this way,
3921 the routers could not see them.
3923 20. Expanded the error message when iplsearch is called with an invalid key to
3924 suggest using net-iplsearch in a host list.
3926 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3927 ACLs are no longer actually imposed (and a message to that effect is
3930 22. If a "gecos" field in a passwd entry contained escaped characters, in
3931 particular, if it contained a \" sequence, Exim got it wrong when building
3932 a From: or a Sender: header from that name. A second bug also caused
3933 incorrect handling when an unquoted " was present following a character
3934 that needed quoting.
3936 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3937 was not being matched caselessly.
3939 24. Arranged for all hyphens in the exim.8 source to be escaped with
3942 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3943 properly. Recipient callout cache records were still being keyed to include
3944 the sender, even when use_sender was set false. This led to far more
3945 callouts that were necessary. The sender is no longer included in the key
3946 when use_sender is false.
3948 26. Added "control = submission" modifier to ACLs.
3950 27. Added the ${base62d: operator to decode base 62 numbers.
3952 28. dnsdb lookups can now access SRV records.
3954 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3955 the configuration file.
3957 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3958 (-v) mode. This makes the output for a verbose queue run more intelligible.
3960 31. Added a use_postmaster feature to recipient callouts.
3962 32. Added the $body_zerocount variable, containing the number of binary zero
3963 bytes in the message body.
3965 33. The time of last modification of the "new" subdirectory is now used as the
3966 "mailbox time last read" when there is a quota error for a maildir
3969 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3971 35. Added +ignore_unknown as a special item in host lists.
3973 36. Code for decoding IPv6 addresses in host lists is now included, even if
3974 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3975 address was recognized as an IP address, but was then not correctly decoded
3976 into binary, causing unexpected and incorrect effects when compared with
3983 1. Very minor rewording of debugging text in manualroute to say "list of
3984 hosts" instead of "hostlist".
3986 2. If verify=header_syntax was set, and a header line with an unqualified
3987 address (no domain) and a large number of spaces between the end of the
3988 name and the colon was received, the reception process suffered a buffer
3989 overflow, and (when I tested it) crashed. This was caused by some obsolete
3990 code that should have been removed. The fix is to remove it!
3992 3. When running in the test harness, delay a bit after writing a bounce
3993 message to get a bit more predictability in the log output.
3995 4. Added a call to search_tidyup() just before forking a reception process. In
3996 theory, someone could use a lookup in the expansion of smtp_accept_max_
3997 per_host which, without the tidyup, could leave open a database connection.
3999 5. Added the variables $recipient_data and $sender_data which get set from a
4000 lookup success in an ACL "recipients" or "senders" condition, or a router
4001 "senders" option, similar to $domain_data and $local_part_data.
4003 6. Moved the writing of debug_print from before to after the "senders" test
4006 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4007 problems for message scanning, either using a data ACL, or using
4008 local_scan() because the Received: header was not generated till after they
4009 were called (in order to set the time as the time of reception completion).
4010 I have revised the way this works. The header is now generated after the
4011 body is received, but before the ACL or local_scan() are called. After they
4012 are run, the timestamp in the header is updated.
4018 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4019 before starting a queue runner without re-exec. This happened only when
4020 deliver_drop_privilege was set or when the Exim user was set to root. The
4021 effect of the bug was that timeouts during subsequent deliveries caused
4022 crashes instead of being properly handled. The handler is now left at its
4023 default (and expected) setting.
4025 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4026 message, again when deliver_drop_privilege is set or Exim is run as root.
4027 The bug described in (1) was not present in this case, but the tidying up
4028 of the other signals was missing. I have made the two cases consistent.
4030 3. The ignore_target_hosts setting on a manualroute router was being ignored
4031 for hosts that were looked up using the /MX notation.
4033 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4036 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4037 operated on the sender address. After changing the $sender_address to <>
4038 for the sender address verify, Exim was re-instated it as the original
4039 (before rewriting) address, but remembering that it had rewritten it, so it
4040 wasn't rewriting it again. This bug also had the effect of breaking the
4041 sender address verification caching when the sender address was rewritten.
4043 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4044 This has been changed so that if the ip literal address matches
4045 ignore_target_hosts, the router declines.
4047 7. Added expansion conditions match_domain, match_address, and match_local_
4048 part (NOT match_host).
4050 8. The placeholder for the Received: header didn't have a length field set.
4052 9. Added code to Exim itself and to exim_lock to test for a specific race
4053 condition that could lead to file corruption when using MBX delivery. The
4054 issue is with the lockfile that is created in /tmp. If this file is removed
4055 after a process has opened it but before that process has acquired a lock,
4056 there is the potential for a second process to recreate the file and also
4057 acquire a lock. This could lead to two Exim processes writing to the file
4058 at the same time. The added code performs the same test as UW imapd; it
4059 checks after acquiring the lock that its file descriptor still refers to
4060 the same named file.
4062 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4063 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4066 11. Added the smtp_active_hostname option. If used, this will typically be made
4067 to depend on the incoming interface address. Because $interface_address is
4068 not set up until the daemon has forked a reception process, error responses
4069 that can happen earlier (such as "too many connections") no longer contain
4072 12. If an expansion in a condition on a "warn" statement fails because a lookup
4073 defers, the "warn" statement is abandoned, and the next ACL statement is
4074 processed. Previously this caused the whole ACL to be aborted.
4076 13. Added the iplsearch lookup type.
4078 14. Added ident_timeout as a log selector.
4080 15. Added tls_certificate_verified as a log selector.
4082 16. Added a global option tls_require_ciphers (compare the smtp transport
4083 option of the same name). This controls incoming TLS connections.
4085 17. I finally figured out how to make tls_require_ciphers do a similar thing
4086 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4087 before starting the TLS session.
4089 18. Tabs are now shown as \t in -bP output.
4091 19. If the log selector return_path_on_delivery was set, Exim crashed when
4092 bouncing a message because it had too many Received: header lines.
4094 20. If two routers both had headers_remove settings, and the first one included
4095 a superfluous trailing colon, the final name in the first list and the
4096 first name in the second list were incorrectly joined into one item (with a
4097 colon in the middle).
4103 1. Added -C and -D options to the exinext utility, mainly to make it easier
4104 to include in the automated testing, but these could be helpful when
4105 multiple configurations are in use.
4107 2. The exinext utility was not formatting the output nicely when there was
4108 an alternate port involved in the retry record key, nor when there was a
4109 message id as well (for retries that were specific to a specific message
4110 and a specific host). It was also confused by IPv6 addresses, because of
4111 the additional colons they contain. I have fixed the IPv4 problem, and
4112 patched it up to do a reasonable job for IPv6.
4114 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4115 delivery, the log line now contains "pipelined" if PIPELINING was used.
4117 4. An SMTP transport process used to panic and die if the bind() call to set
4118 an explicit outgoing interface failed. This has been changed; it is now
4119 treated in the same way as a connect() failure.
4121 5. A reference to $sender_host_name in the part of a conditional expansion
4122 that was being skipped was still causing a DNS lookup. This no longer
4125 6. The def: expansion condition was not recognizing references to header lines
4126 that used bh_ and bheader_.
4128 7. Added the _cache feature to named lists.
4130 8. The code for checking quota_filecount in the appendfile transport was
4131 allowing one more file than it should have been.
4133 9. For compatibility with Sendmail, the command line option
4141 and sets the incoming protocol and host name (for trusted callers). The
4142 host name and its colon can be omitted when only the protocol is to be set.
4143 Note the Exim already has two private options, -pd and -ps, that refer to
4144 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4145 "s", but I don't think that's a major issue.
4147 10. A number of refactoring changes to the code, none of which should affect
4150 (a) The number of logging options was getting close to filling up the
4151 32-bit word that was used as a bit map. I have split them into two classes:
4152 those that are passed in the argument to log_write(), and those that are
4153 only ever tested independently outside of that function. These are now in
4154 separate 32-bit words, so there is plenty of room for expansion again.
4155 There is no change in the user interface or the logging behaviour.
4157 (b) When building, for example, log lines, the code previously used a
4158 macro that called string_cat() twice, in order to add two strings. This is
4159 not really sufficiently general. Furthermore, there was one instance where
4160 it was actually wrong because one of the argument was used twice, and in
4161 one call a function was used. (As it happened, calling the function twice
4162 did not affect the overall behaviour.) The macro has been replaced by a
4163 function that can join an arbitrary number of extra strings onto a growing
4166 (c) The code for expansion conditions now uses a table and a binary chop
4167 instead of a serial search (which was left over from when there were very
4168 few conditions). Also, it now recognizes conditions like "pam" even when
4169 the relevant support is not compiled in: a suitably worded error message is
4170 given if an attempt is made to use such a condition.
4172 11. Added ${time_interval:xxxxx}.
4174 12. A bug was causing one of the ddress fields not to be passed back correctly
4175 from remote delivery subprocesses. The field in question was not being
4176 subsequently used, so this caused to problems in practice.
4178 13. Added new log selectors queue_time and deliver_time.
4180 14. Might have fixed a bug in maildirsizefile handling that threw up
4181 "unexpected character" debug warnings, and recalculated the data
4182 unnecessarily. In any case, I expanded the warning message to give more
4185 15. Added the message "Restricted characters in address" to the statements in
4186 the default ACL that block characters like @ and % in local parts.
4188 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4189 Three changes have been made:
4191 (a) There was a serious bug; a negative response to MAIL caused the whole
4192 recipient domain to be cached as invalid, thereby blocking all messages
4193 to all local parts at the same domain, from all senders. This bug has
4194 been fixed. The domain is no longer cached after a negative response to
4195 MAIL if the sender used is not empty.
4197 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4200 (c) A new callout option, "use_sender" has been added for people who want
4201 the modified behaviour.
4207 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4210 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4211 indeed breaks things for older releases.
4213 3. Added additional logging to the case where there is a problem reading data
4214 from a filter that is running in a subprocess using a pipe, in order to
4215 try to track down a specific problem.
4217 4. Testing facility fudge: when running in the test harness and attempting
4218 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4219 getting "No route to host". Convert this to a timeout.
4221 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4224 6. Some OS don't have socklen_t but use size_t instead. This affects the
4225 fifth argument of getsockopt() amongst other things. This is now
4226 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4227 can be set for individual OS. I have set it for SunOS5, OSF1, and
4228 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4229 some earlier ones do not.
4231 7. Change 4.30/15 was not doing the test caselessly.
4233 8. The standard form for an IPv6 address literal was being rejected by address
4234 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4235 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4236 this, as well as the form without the "IPv6" on the front (but only when
4237 address literals are enabled, of course).
4239 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4241 10. Exim crashed if a message with an empty sender address specified by -f
4242 encountered a router with an errors_to setting. This could be provoked only
4243 by a command such as
4247 where an empty string was supplied; "<>" did not hit this bug.
4249 11. Installed PCRE release 4.5.
4251 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4252 remained set. It is now erased.
4254 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4255 times from message ids (which are base 36 rather than the normal 62).
4257 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4258 were being counted as actual protocol errors, and logged if the log
4259 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4260 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4261 and DATA following a set of rejected RCPTs do not count as protocol errors.
4262 In other words, Exim assumes they were pipelined, though this may not
4263 actually be the case. Of course, in all cases the client gets an
4264 appropriate error code.
4266 15. If a lookup fails in an ACL condition, a message about the failure may
4267 be available; it is used if testing the ACL cannot continue, because most
4268 such messages specify what the cause of the deferral is. However, some
4269 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4270 that caused an old message to be retained and used if a later statement
4271 caused a defer, replacing the real cause of the deferral.
4273 16. If an IP address had so many PTR records that the DNS lookup buffer
4274 was not large enough to hold them, Exim could crash while trying to process
4275 the truncated data. It now detects and logs this case.
4277 17. Further to 4.21/58, another change has been made: if (and only if) the
4278 first line of a message (the first header line) ends with CRLF, a bare LF
4279 in a subsequent header line has a space inserted after it, so as not to
4280 terminate the header.
4282 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4283 unnecessarily, used atoi() instead of strtol(), and didn't check the
4284 termination when getting file sizes from file names by regex.
4286 19. Completely re-implemented the support for maildirsize files, in the light
4287 of a number of problems with the previous contributed implementation
4288 (4.30/29). In particular:
4290 . If the quota is zero, the maildirsize file is maintained, but no quota is
4293 . If the maildir directory does not exist, it is created before any attempt
4294 to write a maildirsize file.
4296 . The quota value in the file is just a cache; if the quota is changed in
4297 the transport, the new value overrides.
4299 . A regular expression is available for excluding directories from the
4302 20. The autoreply transport checks the characters in options that define the
4303 message's headers; it allows continued headers, but it was checking with
4304 isspace() after an embedded newline instead of explicitly looking for a
4307 21. If all the "regular" hosts to which an address was routed had passed their
4308 expiry times, and had not reached their retry times, the address was
4309 bounced, even if fallback hosts were defined. Now Exim should go on to try
4312 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4313 equivalent code in the SMTP transport. Some hosts send humungous responses
4314 to HELO/EHLO, more than 1024 it seems.
4316 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4317 gives compiler warnings in some environments. I've now done it "properly",
4320 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4321 (because of problems with the built-in one) was declared to return uschar *
4322 instead of char *, causing compiler failure.
4324 25. Fixed a file descriptor leak when processing alias/forward files.
4326 26. Fixed a minor format string issue in dbfn.c.
4328 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4330 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4331 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4334 29. When a sender address is verified, it is cached, to save repeating the test
4335 when there is more than one recipient in a message. However, when the
4336 verification involves a callout, it is possible for different callout
4337 options to be set for different recipients. It is too complicated to keep
4338 track of this in the cache, so now Exim always runs a verification when a
4339 callout is required, relying on the callout cache for the optimization.
4340 The overhead is duplication of the address routing, but this should not be
4343 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4344 to be verified with callout=postmaster, and the main callout worked but the
4345 postmaster check failed, the verification correctly failed. However, if a
4346 subsequent RCPT command asked for sender verification *without* the
4347 postmaster check, incorrect caching caused this verification also to fail,
4350 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4351 it was not caching the DNS options (qualify_single, search_parents) that
4352 were used when the lookup failed. A subsequent lookup with different
4353 options therefore always gave the same answer, though there were cases
4354 where it should not have. (Example: a "domains = !$mx_any" option on a
4355 dnslookup router: the "domains" option is always processed without any
4356 widening, but the router might have qualify_single set.) Now Exim uses the
4357 cached value only when the same options are set.
4359 32. Added John Jetmore's "exipick" utility to the distribution.
4361 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4362 than a timeout (e.g. a certificate is required, and is not provided), an
4363 Exim server now closes the connection immediately. Previously it waited for
4364 the client to close - but if the client is SSL, it seems that they each
4365 wait for each other, leading to a delay before one of them times out.
4367 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4368 maintained 0.8.x compatibility because I don't think many are using it, and
4369 it is clearly obsolete.
4371 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4374 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4375 client certificate was expired. A simple patch fixes this, though I don't
4376 understand the full logic of why the verify callback is called multiple
4379 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4380 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4381 which causes problems with some clients (such as the Certicom SSL Plus
4382 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4383 disables the coutermeasure allowing Eudora to connect."
4385 38. Exim was not checking that a write() to a log file succeeded. This could
4386 lead to Bad Things if a log got too big, in particular if it hit a file
4387 size limit. Exim now panics and dies if it cannot write to a log file, just
4388 as it does if it cannot open a log file.
4390 39. Modified OS/Makefile-Linux so that it now contains
4392 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4394 The two -D definitions ensure that Exim is compiled with large file
4395 support, which makes it possible to handle log files that are bigger than
4398 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4399 instance) a domain was checked against a named list that involved a lookup,
4400 causing $domain_data to be set, then another domain was checked against the
4401 same list, then the first domain was re-checked, the value of $domain_data
4402 after the final check could be wrong. In particular, if the second check
4403 failed, it could be set empty. This bug probably also applied to
4406 41. The strip_trailing_dot option was not being applied to the address given
4407 with the -f command-line option.
4409 42. The code for reading a message's header from the spool was incrementing
4410 $received_count, but never initializing it. This meant that the value was
4411 incorrect (doubled) while delivering a message in the same process in which
4412 it was received. In the most common configuration of Exim, this never
4413 happens - a fresh exec is done - but it can happen when
4414 deliver_drop_privilege is set.
4416 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4417 it now includes up to 150 characters of the unexpected data in the log
4420 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4421 and building data strings. The size of both of these buffers was 10 000
4422 bytes - far larger than anybody would *ever* want, thought I. Needless to
4423 say, somebody hit the limit. I have increased the maximum line length to
4424 20 000 and the maximum data length of concatenated lines to 100 000. I have
4425 also fixed two bugs, because there was no checking on these buffers. Tsk,
4426 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4427 buffer is too small.
4429 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4430 lsearch lookups. Now it does.
4432 46. When parsing a route_list item in a manualroute router, a fixed-length
4433 buffer was used for the list of hosts. I made this 1024 bytes long,
4434 thinking that nobody would ever have a list of hosts that long. Wrong.
4435 Somebody had a whole pile of complicated expansion conditions, and the
4436 string was silently truncated, leading to an expansion error. It turns out
4437 that it is easier to change to an unlimited length (owing to other changes
4438 that have happened since this code was originally written) than to build
4439 structure for giving a limitation error. The length of the item that
4440 expands into the list of hosts is now unlimited.
4442 47. The lsearch lookup could not handle data where the length of text line was
4443 more than 4095 characters. Such lines were truncated, leading to shortened
4444 data being returned. It should now handle lines of any length.
4446 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4447 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4450 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4451 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4452 no longer happens in comment lines. A list of replacements is now placed
4453 at the head of all of the source files, except those whose only change is
4454 to replace PERL_COMMAND in the very first #! line.
4456 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4457 messages on the queue, with a bottom-up merge sort, using code contributed
4458 by Michael Haardt. This should make operations like -bp somewhat faster on
4459 large queues. It won't affect queue runners, except when queue_run_in_order
4462 51. Installed eximstats 1.31 in the distribution.
4464 52. Added support for SRV lookups to the dnslookup router.
4466 53. If an ACL referred to $message_body or $message_body_end, the value was not
4467 reset for any messages that followed in the same SMTP session.
4469 54. The store-handling optimization for building very long strings was not
4470 differentiating between the different store pools. I don't think this
4471 actually made any difference in practice, but I've tidied it.
4473 55. While running the routers to verify a sender address, $sender_address
4474 was still set to the sender address. This is wrong, because when routing to
4475 send a bounce to the sender, it would be empty. Therefore, I have changed
4476 it so that, while verifying a sender address, $sender_address is set to <>.
4477 (There is no change to what happens when verifying a recipient address.)
4479 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4480 target A or AAAA records (if not already returned) without resetting the
4481 qualify_single or search_parents options of the DNS resolver. These are
4482 inappropriate in this case because the targets of MX and SRV records must
4483 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4484 target that, when qualified, matched something in the local domain. These
4485 two options are now turned off when doing these lookups.
4487 57. It seems that at least some releases of Reiserfs (which does not have the
4488 concept of a fixed number of inodes) returns zero and not -1 for the
4489 number of available inodes. This interacted badly with check_spool_inodes,
4490 which assumed that -1 was the "no such thing" setting. What I have done is
4491 to check that the total number of inodes is greater than zero before doing
4492 the test of how many are available.
4494 58. When a "warn" ACL statement has a log_message modifier, the message is
4495 remembered, and not repeated. This is to avoid a lot of repetition when a
4496 message has many recipients that cause the same warning to be written.
4497 Howewer, Exim was preserving the list of already written lines for an
4498 entire SMTP session, which doesn't seem right. The memory is now reset if a
4499 new message is started.
4501 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4502 debugging output unless log_rewrite was also set.
4504 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4505 of (int)(handle) when we know that handle contains (void *)(-1).
4507 61. The Exim daemon panic-logs an error return when it closes the incoming
4508 connection. However "connection reset by peer" seems to be common, and
4509 isn't really an error worthy of noting specially, so that particular error
4512 62. When Exim is trying to find all the local interfaces, it used to panic and
4513 die if the ioctl to get the interface flags failed. However, it seems that
4514 on at least one OS (Solaris 9) it is possible to have an interface that is
4515 included in the list of interfaces, but for which you get a failure error
4516 for this call. This happens when the interface is not "plumbed" into a
4517 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4518 failure of the "get flags" call assumes that the interface is down.
4520 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4521 makes life easier for people who are doing arithmetic on fields extracted
4522 from dates, where you often get leading zeros that should not be
4523 interpreted as octal.
4525 64. Added qualify_domain to the redirect router, to override the global
4528 65. If a pathologically long header line contained very many addresses (the
4529 report of this problem mentioned 10 000) and each of them was rewritten,
4530 Exim could use up a very large amount of memory. (It kept on making new
4531 copies of the header line as it rewrote, and never released the old ones.)
4532 At the expense of a bit more processing, the header rewriting function has
4533 been changed so that it no longer eats memory in this way.
4535 66. The generation of the Received: header has been moved from the time that a
4536 message starts to be received, to the time that it finishes. The timestamp
4537 in the Received: header should now be very close to that of the <= log
4538 line. There are two side-effects of this change:
4540 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4541 logged header lines no longer include the local Received: line, because
4542 it has not yet been created. The same applies to a copy of the message
4543 that is returned to a non-SMTP sender when a message is rejected.
4545 (b) When a filter file is tested using -bf, no additional Received: header
4546 is added to the test message. After some thought, I decided that this
4549 This change does not affect the value of $received_for. It is still set
4550 after address rewriting, but before local_scan() is called.
4552 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4554 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4555 gave an unhelpful panic error message, and a defer error. I have managed to
4556 change this behaviour so that it now rejects any supplied certificate,
4557 which seems right, as the list of acceptable certificates is empty.
4559 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4560 gave an unhelpful defer error. I have not managed to make this reject any
4561 supplied certificates, but the error message it gives is "no certificate
4562 supplied", which is not helpful.
4564 70. exigrep's output now also includes lines that are not associated with any
4565 message, but which match the given pattern. Implemented by a patch from
4566 Martin Sluka, which also tidied up the Perl a bit.
4568 71. Recipient callout verification, like sender verification, was using <> in
4569 the MAIL FROM command. This isn't really the right thing, since the actual
4570 sender may affect whether the remote host accepts the recipient or not. I
4571 have changed it to use the actual sender in the callout; this means that
4572 the cache record is now keyed on a recipient/sender pair, not just the
4573 recipient address. There doesn't seem to be a real danger of callout loops,
4574 since a callout by the remote host to check the sender would use <>.
4575 [SEE ABOVE: changed after hitting problems.]
4577 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4578 temporary errors. However, in the case of such a code being given after
4579 the end of a data transmission (i.e. after ".") Exim was failing to write
4580 a retry record for the message. (Yes, there was some broken host that was
4581 actually sending 8xx at this point.)
4583 73. An unknown lookup type in a host list could cause Exim to panic-die when
4584 the list was checked. (An example that provoked this was putting <; in the
4585 middle of a list instead of at the start.) If this happened during a DATA
4586 ACL check, a -D file could be left lying around. This kind of configuration
4587 error no longer causes Exim to die; instead it causes a defer errror. The
4588 incident is still logged to the main and panic logs.
4590 74. Buglet left over from Exim 3 conversion. The message "too many messages
4591 in one connection" was written to the rejectlog but not the mainlog, except
4592 when address rewriting (yes!) was being logged.
4594 75. Added write_rejectlog option.
4596 76. When a system filter was run not as root (that is, when system_filter_user
4597 was set), the values of the $n variables were not being returned to the
4598 main process; thus, they were not subsequently available in the $sn
4601 77. Added +return_path_on_delivery log selector.
4603 78. A connection timeout was being treated differently from recipients deferred
4604 when testing hosts_max_try with a message that was older than the host's
4605 retry timeout. (The host should not be counted, thus allowing all hosts to
4606 be tried at least once before bouncing.) This may have been the cause of an
4607 occasionally reported bug whereby a message would remain on the queue
4608 longer than the retry timeout, but would be bounced if a delivery was
4609 forced. I say "may" because I never totally pinned down the problem;
4610 setting up timeout/retry tests is difficult. See also the next item.
4612 79. The ultimate address timeout was not being applied to errors that involved
4613 a combination of host plus message (for example, a timeout on a MAIL
4614 command). When an address resolved to a number of possible hosts, and they
4615 were not all tried for each delivery (e.g. because of hosts_max_try), a
4616 message could remain on the queue longer than the retry timeout.
4618 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4621 81. Fixed an obscure SMTP outgoing bug which required at least the following
4622 conditions: (a) there was another message waiting for the same server;
4623 (b) the server returned 5xx to all RCPT commands in the first message so
4624 that the message was not completed; (c) the server dropped the connection
4625 or gave a negative response to the RSET that Exim sends to abort the
4626 transaction. The observed case was a dropped connection after DATA that had
4627 been sent in pipelining mode. That is, the server had advertised PIPELINING
4628 but was not implementing it correctly. The effect of the bug was incorrect
4629 behaviour, such as trying another host, and this could lead to a crash.
4635 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4636 and daemon.c were passed as pointers to ints; they should have been
4637 pointers to socklen_t variables (which are typically unsigned ints).
4639 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4642 3. Fixed a really odd bug that affected only the testing scheme; patching a
4643 certain fixed string in the binary changed the value of another string that
4644 happened to be identical to the end of the original first string.
4646 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4647 name", it returns that address as the IP address. On some operating
4648 systems (e.g. Solaris), it also passes back the IP address string as the
4649 "host name". However, on others (e.g. Linux), it passes back an empty
4650 string. Exim wasn't checking for this, and was changing the host name to an
4651 empty string, assuming it had been canonicized.
4653 5. Although rare, it is permitted to have more than one PTR record for a given
4654 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4655 all the names associated with an address, because they do in Solaris.
4656 However, it seems that they do not in Linux for data that comes from the
4657 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4658 I found this out when I moved to a new Linux workstation and tried to run
4659 the Exim test suite.
4661 To get round this problem I have changed the code so that it now does its
4662 own call to the DNS to look up PTR records when searching for a host name.
4663 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4664 addresses that are only in /etc/hosts are still found.
4666 This behaviour is, however, controlled by an option called host_lookup_
4667 order, which defaults to "bydns:byaddr". If people want to use the other
4668 order, or indeed, just use one or the other means of lookup, they can
4669 specify it in this variable.
4671 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4672 some operating systems, this comes back from gethostbyaddr() as an empty
4673 string, and this is what Exim used to test for. However, it seems that in
4674 other systems, "." is yielded. Exim now tests for this case too.
4676 7. The values of check_spool_space and check_log_space are now held internally
4677 as a number of kilobytes instead of an absolute number of bytes. If a
4678 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4679 kilobyte. This means that much larger values can be stored.
4681 8. Exim monitor: an attempt to get the action menu when not actually pointing
4682 at a message produces an empty menu entitled "No message selected". This
4683 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4684 no entries in it ("Shell widget menu has zero width and/or height"). So I
4685 have added a single, blank menu entry in this case.
4687 9. Added ${quote_local_part.
4689 10. MIME decoding is now applied to the contents of Subject: header lines when
4692 11. Now that a reference to $sender_host_address automatically causes a reverse
4693 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4694 host lookup before query-style lookups in lists that might use this
4695 variable. This has therefore been abolished, and the "net-" prefix is no
4696 longer necessary for query-style lookups.
4698 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4699 have been a typo for LFLAGS, so it has been changed.
4701 13. The install script calls Exim with "-C /dev/null" in order to find the
4702 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4703 to be output. Howeve, since Exim outputs its version number before the
4704 error, it didn't break the script. It just looked ugly. I fixed this by
4705 always allowing "-C /dev/null" if the caller is root.
4707 14. Ignore overlarge ACL variable number when reading spool file - insurance
4708 against a later release with more variables having written the file.
4710 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4711 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4712 this, as well as the form without the "IPv6" on the front.
4714 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4715 OS/Makefile-Darwin file.
4717 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4718 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4720 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4721 variable. However, some OS use ints for inodes. I've added cast to long int
4722 to get rid of the compiler warning.
4724 19. I had forgotten to lock out "/../" in configuration file names when
4725 ALT_CONFIG_PREFIX was set.
4727 20. Routers used for verification do not need to specify transports. However,
4728 if such a router generated a host list, and callout was configured, Exim
4729 crashed, because it could not find a port number from the (non-existent)
4730 transport. It now assumes port 25 in this circumstance.
4732 21. Added the -t option to exigrep.
4734 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4735 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4736 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4737 them is set, LOOKUP_LSEARCH is forced.
4739 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4741 24. Added sender and host information to the "rejected by local_scan()" log
4742 line; previously there was no indication of these.
4744 25. Added .include_if_exists.
4746 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4747 Linux. It turns out that not all file systems support this. Apparently some
4748 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4749 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4750 not supported on the file descriptor, is now ignored when Exim is trying to
4751 sync a directory. This applies only to Linux.
4753 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4755 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4756 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4759 29. Added support for maildirsize files from supplied patch (modified a bit).
4761 30. The use of :fail: followed by an empty string could lead Exim to respond to
4762 sender verification failures with (e.g.):
4764 550 Verification failed for <xxx>
4765 550 Sender verify failed
4767 where the first response line was missing the '-' that indicates it is not
4768 the final line of the response.
4770 31. The loop for finding the name of the user that called Exim had a hardwired
4771 limit of 10; it now uses the value of finduser_retries, which is used for
4772 all other user lookups.
4774 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4777 33. Exim was neglecting to zero errno before one call of strtol() when
4778 expanding a string and expecting an integer value. On some systems this
4779 resulted in spurious "integer overflow" errors. Also, it was casting the
4780 result into an int without checking.
4782 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4783 did not work. The code looks as if it has *never* worked, though it appears
4784 to have been documented since at least releast 1.62. I have made it work.
4786 35. The "timeout_DNS" error in retry rules, also documented since at least
4787 1.62, also never worked. As it isn't clear exactly what this means, and
4788 clearly it isn't a major issue, I have abolished the feature by treating it
4789 as "timeout", and writing a warning to the main and panic logs.
4791 36. The display of retry rules for -brt wasn't always showing the error code
4794 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4795 timeout_connect_A, timeout_connect_MX.
4797 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4798 to the empty sender.
4800 39. The daemon was not analysing the content of -oX till after it had closed
4801 stderr and disconnected from the controlling terminal. This meant that any
4802 syntax errors were only noted on the panic log, and the return code from
4803 the command was 0. By re-arranging the code a little, I've made the
4804 decoding happen first, so such errors now appear on stderr, and the return
4805 code is 1. However, the actual setting up of the sockets still happens in
4806 the disconnected process, so errors there are still only recorded on the
4809 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4810 connections (as happens on some IP stacks) was logged at start up time as
4811 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4812 it from "IPv6 and IPv4", which means that two separate sockets are being
4815 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4816 says whether AF_INET or AF_INET6 was passed as an argument.
4818 42. Exiwhat output was messed up when time zones were included in log
4821 43. Exiwhat now gives more information about the daemon's listening ports,
4822 and whether -tls-on-connect was used.
4824 44. The "port" option of the smtp transport is now expanded.
4826 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4827 silently ignored. Now an error message is written to the main and panic
4830 46. There's a new ACL modifier called "logwrite" which writes to a log file
4831 as soon as it is encountered.
4833 47. Added $local_user_uid and $local_user_gid at routing time.
4835 48. Exim crashed when trying to verify a sender address that was being
4838 49. Exim was recognizing only a space character after ".include". It now also
4839 recognizes a tab character.
4841 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4842 extracting the relevant information from the specification. The man page no
4843 longer contains scrambled data for the -d option, and I've added a section
4844 at the front about calling Exim under different names.
4846 51. Added "extra_headers" argument to the "mail" command in filter files.
4848 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4851 53. Installed eximstats 1.29.
4853 54. Added transport_filter_timeout as a generic transport option.
4855 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4856 Cc: header lines. This was required by RFC 822, but it not required by RFC
4859 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4860 incoming messages that did not have them. Now it does so only if the
4861 message originates locally, that is, if there is no associated remote host
4862 address. When Resent- header lines are present, this applies to the Resent-
4863 lines rather than the non-Resent- lines.
4865 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4866 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4868 58. Messages for configuration errors now include the name of the main
4869 configuration file - useful now that there may be more than one file in a
4870 list (.included file names were always shown).
4872 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4873 for those rare installations that do not start the daemon as root or run it
4874 setuid root. I've cut out the call to initgroups() if the daemon is not
4877 60. The Exim user and group can now be bound into the binary as text strings
4878 that are looked up at the start of Exim's processing.
4880 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4882 62. Added $mailstore_basename variable.
4884 63. Installed patch to sieve.c from Michael Haardt.
4886 64. When Exim failed to open the panic log after failing to open the main log,
4887 the original message it was trying to log was written to stderr and debug
4888 output, but if they were not available (the usual case in production), it
4889 was lost. Now it is written to syslog before the two lines that record the
4890 failures to open the logs.
4892 65. Users' Exim filters run in subprocesses under the user's uid. It is
4893 possible for a "deliver" command or an alias in a "personal" command to
4894 provoke an address rewrite. If logging of address rewriting is configured,
4895 this fails because the process is not running as root or exim. There may be
4896 a better way of dealing with this, but for the moment (because 4.30 needs
4897 to be released), I have disabled address rewrite logging when running a
4898 filter in a non-root, non-exim process.
4904 1. The buildconfig auxiliary program wasn't quoting the value set for
4905 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4906 not defined. This bug was masked in 4.22 by the effect that was fixed in
4909 2. Some messages that were rejected after a message id was allocated were
4910 shown as "incomplete" by exigrep. It no longer does this for messages that
4911 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4913 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4914 have allow_domain_literals set, the ID did not get logged in the <= line.
4915 Domain literals are now always recognized in Message-ID: header lines.
4917 4. The first argument for a ${extract expansion item is the key name or field
4918 number. Leading and trailing spaces in this item were not being ignored,
4919 causing some misleading effects.
4921 5. When deliver_drop_privilege was set, single queue runner processes started
4922 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4923 same command in the process it spins off) were not dropping privilege.
4925 6. When the daemon running as "exim" started a queue runner, it always
4926 re-executed Exim in the spun-off process. This is a waste of effort when
4927 deliver_drop_privilege is set. The new process now just calls the
4928 queue-runner function directly.
4934 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4937 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4938 ignored. Though the use of -oP was forcing the writing of a pid file, it
4939 was always written to the default place.
4941 3. If the message "no IP address found for host xxxx" is generated during
4942 incoming verification, it is now followed by identification of the incoming
4943 connection (so you can more easily find what provoked it).
4945 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4947 5. Added some features to "harden" Exim a bit more against certain attacks:
4949 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4950 be put in Local/Makefile. This is like the never_users runtime option,
4951 but it cannot be overridden. The default setting is "root".
4953 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4954 prefix string with which any file named in a -C command line option
4957 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4958 is retained for -C and -D only if the caller of Exim is root. Without
4959 it, the exim user may also use -C and -D and retain privilege.
4961 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4962 command line option is disabled.
4964 6. Macro names set by the -D option must start with an upper case letter, just
4965 like macro names defined in the configuration file.
4967 7. Added "dereference=" facility to LDAP.
4969 8. Two instances of the typo "uknown" in the source files are fixed.
4971 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4972 the Configure-Makefile script screwed up while processing it.
4974 10. Incorporated PCRE 4.4.
4976 11. The SMTP synchronization check was not operating right at the start of an
4977 SMTP session. For example, it could not catch a HELO sent before the client
4978 waited for the greeting. There is now a check for outstanding input at the
4979 point when the greeting is written. Because of the duplex, asynchronous
4980 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4981 way, but not yet received, when the check is performed.
4983 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4984 on TCP/IP sockets, because this apparently causes some broken clients to
4987 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4988 unchanged) from the Cygwin maintainer.
4990 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4991 was supported instead of testing for mbx. Effectively a typo.
4993 15. The spa authenticator server code was not checking that the input it
4994 received was valid base64.
4996 16. The debug output line for the "set" modifier in ACLs was not showing the
4997 name of the variable that was being set.
4999 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5001 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5002 lookup on its own. Something else was needed to trigger the lookup. For
5003 example, a match in host_lookup or the need for a host name in a host list.
5004 Now, if $sender_host_name is referenced and the host name has not yet been
5005 looked up, a lookup is performed. If the lookup fails, the variable remains
5006 empty, and $host_lookup_failed is set to "1".
5008 19. Added "eqi" as a case-independent comparison operator.
5010 20. The saslauthd authentication condition could segfault if neither service
5011 nor realm was specified.
5013 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5014 error message that was logged was misleading, and incoming SMTP
5015 connections were dropped. The message is now more accurate, and temporary
5016 errors are given to SMTP connections.
5018 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5019 (except RSET) with a 421 error, until QUIT is received. However, it was
5020 failing to send a response to QUIT.
5022 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5023 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5024 ACL is now run after the helo_try_verify_hosts code.
5026 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5027 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5028 case-independent, so other case variants are also recognized). Apparently
5029 some systems use these upper case variants.
5031 25. If more than two messages were waiting for the same host, and a transport
5032 filter was specified for the transport, Exim sent two messages over the
5033 same TCP/IP connection, and then failed with "socket operation on non-
5034 socket" when it tried to send the third.
5036 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5038 27. The extern definition of crypt16() in expand.c was not being excluded when
5039 the OS had its own crypt16() function.
5041 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5042 as a preferred synonym for return_size_limit, both as an option and as an
5045 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5047 30. Changed the default configuration ACL to relax the local part checking rule
5048 for addresses that are not in any local domains. For these addresses,
5049 slashes and pipe symbols are allowed within local parts, but the sequence
5050 /../ is explicitly forbidden.
5052 31. SPA server authentication was not clearing the challenge buffer before
5055 32. log_message in a "warn" ACL statement was writing to the reject log as
5056 well as to the main log, which contradicts the documentation and doesn't
5057 seem right (because no rejection is happening). So I have stopped it.
5059 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5060 However, I am unable to do any testing of this.
5062 34. Fixed an infelicity in the appendfile transport. When checking directories
5063 for a mailbox, to see if any needed to be created, it was accidentally
5064 using path names with one or more superfluous leading slashes; tracing
5065 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5067 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5068 contents are added to the log line that is written for every discarded
5069 recipient. (Previously a log_message setting was ignored.)
5071 36. The ${quote: operator now quotes the string if it is empty.
5073 37. The install script runs exim in order to find its version number. If for
5074 some reason other than non-existence or emptiness, which it checks, it
5075 could not run './exim', it was installing it with an empty version number,
5076 i.e. as "exim-". This error state is now caught, and the installation is
5079 38. An argument was missing from the function that creates an error message
5080 when Exim fails to connect to the socket for saslauthd authentication.
5081 This could cause Exim to crash, or give a corrupted message.
5083 39. Added isip, isip4, and isip6 to ${if conditions.
5085 40. The ACL variables $acl_xx are now saved with the message, and can be
5086 accessed later in routers, transports, and filters.
5088 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5089 strings in the file are not string-expanded.
5091 42. If a MAIL command specified a SIZE value that was too large to fit into an
5092 int variable, the check against message_size_limit failed. Such values are
5093 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5094 day this will have to be increased, but I don't think I want to be around
5095 when emails are that large.
5102 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5103 iconv() is not standard in FreeBSD.
5105 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5106 IPv6 enabled. The observed symptom was a segmentation fault on return from
5107 the function os_common_find_running_interfaces() in src/os.c.
5109 3. In the check_special_case() function in daemon.c I had used "errno" as an
5110 argument name, which causes warnings on some systems. This was basically a
5111 typo, since it was named "eno" in the comments!
5113 4. The code that waits for the clock to tick (at a resolution of some fraction
5114 of a second) so as to ensure message-id uniqueness was always waiting for
5115 at least one whole tick, when it could have waited for less. [This is
5116 almost certainly not relevant at current processor speeds, where it is
5117 unlikely to ever wait at all. But we try to future-proof.]
5119 5. The function that sleeps for a time interval that includes fractions of a
5120 second contained a race. It did not block SIGALRM between setting the
5121 timer, and suspending (a couple of lines later). If the interval was short
5122 and the sigsuspend() was delayed until after it had expired, the suspension
5123 never ended. On busy systems this could lead to processes getting stuck for
5126 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5127 process, before it forks any delivery processes. The open lookup caching
5128 mechanism meant that the open file or database connection was passed into
5129 the delivery process. The problem was that delivery processes always tidy
5130 up cached lookup data. This could cause a problem for the next delivery
5131 process started by the queue runner, because the external queue runner
5132 process does not know about the closure. So the next delivery process
5133 still has data in the lookup cache. In the case of a file lookup, there was
5134 no problem because closing a file descriptor in a subprocess doesn't affect
5135 the parent. However, if the lookup was caching a connection to a database,
5136 the connection was closed, and the second delivery process was likely to
5137 see errors such as "PGSQL: query failed: server closed the connection
5138 unexpectedly". The problem has been fixed by closing all cached lookups
5139 in a queue runner before running a delivery process.
5141 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5142 seem to have the "const" qualifier which it has on other OS. I've
5145 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5146 *of the same type* (client or server) with the same public name that an
5147 error should be diagnosed.
5149 9. When Exim looked up a host name for an IP address, but failed to find the
5150 original IP address when looking up the host name (a safety check), it
5151 output the message "<ip address> does not match any IP for NULL", which was
5152 confusing, to say the least. The bug was that the host name should have
5153 appeared instead of "NULL".
5155 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5156 user that is built into the binary, and the -C or -D options is used, root
5157 privilege is dropped before the configuration file is read. In addition,
5158 logging is switched to stderr instead of the normal log files. If the
5159 configuration then re-defines the Exim user, the unprivileged environment
5160 is probably not what is expected, so Exim logs a panic warning message (but
5163 However, if deliver_drop_privilege is set, the unprivileged state may well
5164 be exactly what is intended, so the warning has been cut out in that case,
5165 and Exim is allowed to try to write to its normal log files.
5171 1. smtp_return_error_details was not giving details for temporary sender
5172 or receiver verification errors.
5174 2. Diagnose a configuration error if two authenticators have the same public
5177 3. Exim used not to create the message log file for a message until the first
5178 delivery attempt. This could be confusing when incoming messages were held
5179 for policy or load reasons. The message log file is now created at the time
5180 the message is received, and an initial "Received" line is written to it.
5182 4. The automatically generated man page for command line options had a minor
5183 bug that caused no ill effects; however, a more serious problem was that
5184 the procedure for building the man page automatically didn't always
5185 operate. Consequently, release 4.20 contains an out-of-date version. This
5186 shouldn't happen again.
5188 5. When building Exim with embedded Perl support, the script that builds the
5189 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5190 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5192 6. The freeze_tell option was not being used for messages that were frozen on
5193 arrival, either by an ACL or by local_scan().
5195 7. Added the smtp_incomplete_transaction log selector.
5197 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5198 was accepting AUTH without a new EHLO.
5200 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5201 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5204 10. Logging of TCP/IP connections (when configured) now happens in the main
5205 daemon process instead of the child process, so that the TCP/IP connection
5206 count is more accurate (but it can never be perfect).
5208 11. The use of "drop" in a nested ACL was not being handled correctly in the
5209 outer ACL. Now, if condition failure induced by the nested "drop" causes
5210 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5211 or "require"), the connection is dropped.
5213 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5214 that yield "discard" can now be used with an "accept" or a "discard" verb,
5215 but an error is generated for any others (because I can't see a useful way
5216 to define what should happen).
5218 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5219 are now processed in the same way as lines in the Exim configuration file.
5220 In particular, continuation lines are supported.
5222 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5224 15. Added -ti meaning -t -i.
5226 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5227 domains, and warn by logging if others are found.
5229 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5230 returned from GIFCONF when Exim is trying to find the list of interfaces on
5231 a host. The code in os.c has been modified to copy each ifreq to an aligned
5232 structure in all cases.
5234 Also, in some cases, the returned ifreq's were being copied to a 'struct
5235 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5236 means the last couple of bytes of an IPv6 address could be chopped if the
5237 ifreq contained only a normal sockaddr (14 bytes storage).
5239 18. Named domain lists were not supported in the hosts_treat_as_local option.
5240 An entry such as +xxxx was not recognized, and was treated as a literal
5243 19. Ensure that header lines added by a DATA ACL are included in the reject log
5244 if the ACL subsequently rejects the message.
5246 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5247 MD5 (which is deprecated).
5249 21. When testing a filter file using -bf, Exim was writing a message when it
5250 took the sender from a "From " line in the message, but it was not doing so
5251 when it took $return_path from a Return-Path: header line. It now does.
5253 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5254 with a valid header line field name (a series of printing characters
5255 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5257 23. Changed "disc" in the source to "disk" to conform to the documentation and
5258 the book and for uniformity.
5260 24. Ignore Sendmail's -Ooption=value command line item.
5262 25. When execve() failed while trying to run a command in a pipe transport,
5263 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5264 could be confused with a return value of 69 from the command itself. This
5265 has been changed to 127, the value the shell returns if it is asked to run
5266 a non-existent command. The wording for the related log line suggests a
5267 non-existent command as the problem.
5269 26. If received_header_text expands to an empty string, do not add a Received:
5270 header line to the message. (Well, it adds a token one on the spool, but
5271 marks it "old" so that it doesn't get used or transmitted.)
5273 27. Installed eximstats 1.28 (addition of -nt option).
5275 28. There was no check for failure on the call to getsockname() in the daemon
5276 code. This can fail if there is a shortage of resources on the system, with
5277 ENOMEM, for example. A temporary error is now given on failure.
5279 29. Contrary to the C standard, it seems that in some environments, the
5280 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5281 program. Exim now does this explicitly; it affects the formatting of
5282 timestamps using strftime().
5284 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5285 complaints. I've now initialized all the variables, to avoid this.
5287 32. Header lines added by a system filter were not being "seen" during
5288 transport-time rewrites.
5290 33. The info_callback() function passed to OpenSSL is set up with type void
5291 (*)(SSL *, int, int), as described somewhere. However, when calling the
5292 function (actually a macro) that sets it up, the type void(*)() is
5293 expected. I've put in a cast to prevent warnings from picky compilers.
5295 34. If a DNS black list lookup found a CNAME record, but there were no A
5296 records associated with the domain it pointed at, Exim crashed.
5298 35. If a DNS black list lookup returned more than one A record, Exim ignored
5299 all but the first. It now scans all returned addresses if a particular IP
5300 value is being sought. In this situation, the contents of the
5301 $dnslist_value variable are a list of all the addresses, separated by a
5304 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5305 to accept a host name and all its aliases if the forward lookup for any of
5306 them yielded the IP address of the incoming connection. Now it accepts only
5307 those names whose forward lookup yields the correct IP address. Any other
5308 names are discarded. This closes a loophole whereby a rogue DNS
5309 administrator could create reverse DNS records to break through a
5310 wildcarded host restriction in an ACL.
5312 37. If a user filter or a system filter that ran in a subprocess used any of
5313 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5314 the wrong values were passed to the pipe command ($thisaddress had the
5315 value of $0, $0 had the value of $1, etc). This bug was introduced by
5316 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5318 38. Improved the line breaking for long SMTP error messages from ACLs.
5319 Previously, if there was no break point between 40 and 75 characters, Exim
5320 left the rest of the message alone. Two changes have been made: (a) I've
5321 reduced the minimum length to 35 characters; (b) if it can't find a break
5322 point between 35 and 75 characters, it looks ahead and uses the first one
5323 that it finds. This may give the occasional overlong line, but at least the
5324 remaining text gets split now.
5326 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5327 file descriptors might be low, and that setting 1000 would always raise it.
5328 It turns out that in some environments, the limit is already over 1000 and
5329 that lowering it causes trouble. So now Exim takes care not to decrease it.
5331 40. When delivering a message, the value of $return_path is set to $sender_
5332 address at the start of routing (routers may change the value). By an
5333 oversight, this default was not being set up when an address was tested by
5334 -bt or -bv, which affected the outcome if any router or filter referred to
5337 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5338 log only when "message" or "log_message" are set. However, if one of the
5339 conditions was an address verification, or a call to a nested ACL, the
5340 messages generated by the underlying test were being passed through. This
5341 no longer happens. The underlying message is available in $acl_verify_
5342 message for both "message" and "log_message" expansions, so it can be
5343 passed through if needed.
5345 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5346 new expansion $bh_ to give the encoded byte string without charset
5347 translation. Translation happens only if iconv() is available; HAVE_ICONV
5348 indicates this at build time. HEADERS_CHARSET gives the charset to
5349 translate to; headers_charset can change it in the configuration, and
5350 "headers charset" can change it in an individual filter file.
5352 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5353 that creates RFC 2047 encoded "words" labels them as that charset instead
5354 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5355 expansion operator; (ii) when Exim creates a From: line for a local
5356 message; (iii) when a header line is rewritten to include a "phrase" part.
5358 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5359 buggy, causing it to skip the first lines of messages whose message ID
5360 ended in 'D'. This would not have bitten before Exim release 4.14, because
5361 message IDs were unlikely to end in 'D' before then. The effect was to have
5362 incorrect size information for certain domains.
5364 45. #include "config.h" was missing at the start of the crypt16.c module. This
5365 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5368 46. If there was a timeout during a "random" callout check, Exim treated it as
5369 a failure of the random address, and carried on sending RSET and the real
5370 address. If the delay was just some slowness somewhere, the response to the
5371 original RCPT would be taken as a response to RSET and so on, causing
5372 mayhem of various kinds.
5374 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5375 when I implemented it. It didn't allow for the fact that some option values
5376 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5377 the right test for positive values.
5379 48. Domain names in DNS records are case-independent. Exim always looks them up
5380 in lower case. Some resolvers return domain names in exactly the case they
5381 appear in the zone file, that is, they may contain uppercase letters. Not
5382 all resolvers do this - some return always lower case. Exim was treating a
5383 change of case by a resolver as a change of domain, similar to a widening
5384 of a domain abbreviation. This triggered its re-routing code and so it was
5385 trying to route what was effectively the same domain again. This normally
5386 caused routing to fail (because the router wouldn't handle the domain
5387 twice). Now Exim checks for this case specially, and just changes the
5388 casing of the domain that it ultimately uses when it transmits the message
5391 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5394 50. If a filter generated a file delivery with a non-absolute name (possible if
5395 no home directory exists for the router), the forbid_file option was not
5398 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5399 the existing equality matching.
5401 52. Exim was using ints instead of ino_t variables in some places where it was
5402 dealing with inode numbers.
5404 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5405 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5406 called TMPDIR, and if it finds it is different, it changes its value.
5408 54. The smtp_printf() function is now made available to local_scan() so
5409 additional output lines can be written before returning. There is also an
5410 smtp_fflush() function to enable the detection of a dropped connection.
5411 The variables smtp_input and smtp_batched_input are exported to
5414 55. Changed the default runtime configuration: the message "Unknown user"
5415 has been removed from the ACL, and instead placed on the localuser router,
5416 using the cannot_route_message feature. This means that any verification
5417 failures that generate their own messages won't get overridden. Similarly,
5418 the "Unrouteable address" message that was in the ACL for unverifiable
5419 relay addresses has also been removed.
5421 56. Added hosts_avoid_esmtp to the smtp transport.
5423 57. The exicyclog script was not checking for the esoteric option
5424 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5425 will work only if exicyclog is run under the appropriate euid.
5427 58. Following a discussion on the list, the rules by which Exim recognises line
5428 endings on incoming messages have been changed. The -dropcr and drop_cr
5429 options are now no-ops, retained only for backwards compatibility. The
5430 following line terminators are recognized: LF CRLF CR. However, special
5431 processing applies to CR:
5433 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5434 nor a local message in the state where . is a terminator.
5436 (ii) If a bare CR is encountered in a header line, an extra space is added
5437 after the line terminator so as not to end the header. The reasoning
5438 behind this is that bare CRs in header lines are most likely either
5439 to be mistakes, or people trying to play silly games.
5441 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5442 was being incorrectly given as 18 bytes larger than it should have been.
5443 This is a VOB (very old bug).
5445 60. This may never have affected anything current, but just in case it has:
5446 When the local host is found other than at the start of a list of hosts,
5447 the local host, those with the same MX, and any that follow, are discarded.
5448 When the list in question was part of a longer list of hosts, the following
5449 hosts (not currently being processed) were also being discarded. This no
5450 longer happens. I'm not sure if this situation could ever has previously
5453 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5456 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5457 header. This is something that is recommended in a new Internet Draft, and
5458 is something that is documented as being done by Sendmail. There are two
5459 possible values. For messages generated by the autoreply transport, Exim
5462 Auto-Submitted: auto-replied
5464 whereas for all other generated messages (e.g. bounces) it adds
5466 Auto-Submitted: auto-generated
5468 63. The "personal" condition in filters now includes a test for the
5469 Auto-Submitted: header. If it contains the string "auto-" the message it
5470 not considered personal.
5472 64. Added rcpt_include_affixes as a generic transport option.
5474 65. Added queue_only_override (default true).
5476 66. Added the syslog_duplication option.
5478 67. If what should have been the first header line of a message consisted of
5479 a space followed by a colon, Exim was mis-interpreting it as a header line.
5480 It isn't of course - it is syntactically invalid and should therefore be
5481 treated as the start of the message body. The misbehaviour could have
5482 caused a number of strange effects, including loss of data in subsequent
5483 header lines, and spool format errors.
5485 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5486 client host had authenticated. This control can now be exercised by an ACL
5487 for more flexibility.
5489 69. By default, callouts do not happen when testing with -bh. There is now a
5490 variant, -bhc, which does actually run the callout code, including
5491 consulting and updating the callout cache.
5493 70. Added support for saslauthd authentication, courtesy of Alexander
5496 71. If statvfs() failed on the spool or log directories while checking their
5497 size for availability, Exim confusingly gave the error "space shortage".
5498 Furthermore, in debugging mode it crashed with a floating point exception.
5499 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5500 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5501 serious problem, Exim now writes to the main and panic logs when this
5502 happens, with details of the failure. It then refuses to accept the
5503 incoming message, giving the message "spool directory problem" or "log
5504 directory problem" with a 421 code for SMTP messages.
5506 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5507 0, 1, and 2 exist, because some OS complain for execs without them (see
5508 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5509 descriptors. However, the code omitted to check that the open succeeded,
5510 causing mysterious errors if for some reason the permissions on /dev/null
5511 got screwed. Now Exim writes a message to the main and panic logs, and
5512 bombs out if it can't open /dev/null.
5514 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5515 interact so that it is all more flexible. It is supposed to remain
5516 backwards compatible. Also added extra_local_interfaces.
5518 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5519 to bomb out with an assertion failure - to the client this appears as a
5520 connection drop. This problem occurs in the part of the code that was taken
5521 from the Samba project. Fortunately, the assertion is in a very simple
5522 function, so I have fixed this by reproducing the function inline in the
5523 one place where it is called, and arranging for authentication to fail
5524 instead of killing the process with assert().
5526 75. The SPA client code was not working when the server requested OEM rather
5527 than Unicode encoding.
5529 76. Added code to make require_files with a specific uid setting more usable in
5530 the case where statting the file as root fails - usually a non-root-mounted
5531 NFS file system. When this happens and the failure is EACCES, Exim now
5532 forks a subprocess and does the per-uid checking as the relevant uid.
5534 77. Added process_log_path.
5536 78. If log_file_path was not explicitly set, a setting of check_log_space or
5537 check_log_inodes was ignored.
5539 79. If a space check for the spool or log partitions fails, the incident is now
5540 logged. Of course, in the latter case the data may get lost...
5542 80. Added the %p formatting code to string_format() so that it can be used to
5543 print addresses in debug_print(). Adjusted all the address printing in the
5544 debugging in store.c to use %p rather than %d.
5546 81. There was a concern that a line of code in smtp_in.c could overflow a
5547 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5548 initially expressed, the concern was not well-founded, because trailing
5549 spaces are removed early. However, if the trailing spaces were followed by
5550 a NULL, they did not get removed, so the overflow was possible. Two fixes
5553 (a) I re-wrote the offending code in a cleaner fashion.
5554 (b) If an incoming SMTP command contains a NULL character, it is rejected
5557 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5558 runs initgroups(), so that if the Exim user is in any additional groups,
5559 they will be used during message reception.
5565 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob