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.
84 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
85 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
86 Not seeing resolver debug output on NetBSD, but suspect this is a
87 resolver implementation change.
89 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
90 Left warnings. Added "eximon gdb" invocation mode.
92 PP/21 Defaulting "accept_8bitmime" to true, not false.
94 PP/22 Added -bw for inetd wait mode support.
96 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
97 locate the relevant includes and libraries. Made this the default.
99 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
100 Bugzilla 1246, report and most of solution from Tomasz Kusy.
102 JH/02 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
103 This may cause build issues on older platforms.
109 PP/01 Solaris build fix for Oracle's LDAP libraries.
110 Bugzilla 1109, patch from Stephen Usher.
112 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
114 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
117 TF/02 Fix a couple more cases where we did not log the error message
118 when unlink() failed. See also change 4.74-TF/03.
120 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
121 lock up or crash if it happened to be inside a call to libc when it
122 got a SIGUSR1 from exiwhat.
124 The SIGUSR1 handler appends the current process status to the process
125 log which is later printed by exiwhat. It used to use the general
126 purpose logging code to do this, but several functions it calls are
127 not safe for signals.
129 The new output code in the SIGUSR1 handler is specific to the process
130 log, and simple enough that it's easy to inspect for signal safety.
131 Removing some special cases also simplifies the general logging code.
132 Removing the spurious timestamps from the process log simplifies
135 TF/04 Improved ratelimit ACL condition.
137 The /noupdate option has been deprecated in favour of /readonly which
138 has clearer semantics. The /leaky, /strict, and /readonly update modes
139 are mutually exclusive. The update mode is no longer included in the
140 database key; it just determines when the database is updated. (This
141 means that when you upgrde Exim will forget old rate measurements.)
143 Exim now checks that the per_* options are used with an update mode that
144 makes sense for the current ACL. For example, when Exim is processing a
145 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
146 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
147 must specify per_mail/readonly. If you omit the update mode it defaults to
148 /leaky where that makes sense (as before) or /readonly where required.
150 The /noupdate option is now undocumented but still supported for
151 backwards compatibility. It is equivalent to /readonly except that in
152 ACLs where /readonly is required you may specify /leaky/noupdate or
153 /strict/noupdate which are treated the same as /readonly.
155 A useful new feature is the /count= option. This is a generalization
156 of the per_byte option, so that you can measure the throughput of other
157 aggregate values. For example, the per_byte option is now equivalent
158 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
160 The per_rcpt option has been generalized using the /count= mechanism
161 (though it's more complicated than the per_byte equivalence). When it is
162 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
163 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
164 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
165 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
166 Note that using per_rcpt with a non-readonly update mode in more than
167 one ACL will cause the recipients to be double-counted. (The per_mail
168 and per_byte options don't have this problem.)
170 The handling of very low rates has changed slightly. If the computed rate
171 is less than the event's count (usually one) then this event is the first
172 after a long gap. In this case the rate is set to the same as this event's
173 count, so that the first message of a spam run is counted properly.
175 The major new feature is a mechanism for counting the rate of unique
176 events. The new per_addr option counts the number of different
177 recipients that someone has sent messages to in the last time period. It
178 behaves like per_rcpt if all the recipient addresses are different, but
179 duplicate recipient addresses do not increase the measured rate. Like
180 the /count= option this is a general mechanism, so the per_addr option
181 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
182 example, measure the rate that a client uses different sender addresses
183 with the options per_mail/unique=$sender_address. There are further
184 details in the main documentation.
186 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
188 TF/06 Removed a few PCRE remnants.
190 TF/07 Automatically extract Exim's version number from tags in the git
191 repository when doing development or release builds.
193 PP/02 Raise smtp_cmd_buffer_size to 16kB.
194 Bugzilla 879. Patch from Paul Fisher.
196 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
197 Heavily based on revision 40f9a89a from Simon Arlott's tree.
200 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
202 PP/05 Variable $av_failed, true if the AV scanner deferred.
203 Bugzilla 1078. Patch from John Horne.
205 PP/06 Stop make process more reliably on build failure.
206 Bugzilla 1087. Patch from Heiko Schlittermann.
208 PP/07 Make maildir_use_size_file an _expandable_ boolean.
209 Bugzilla 1089. Patch from Heiko Schlittermann.
211 PP/08 Handle ${run} returning more data than OS pipe buffer size.
212 Bugzilla 1131. Patch from Holger Weiß.
214 PP/09 Handle IPv6 addresses with SPF.
215 Bugzilla 860. Patch from Wolfgang Breyha.
217 PP/10 GnuTLS: support TLS 1.2 & 1.1.
219 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
222 PP/11 match_* no longer expand right-hand-side by default.
223 New compile-time build option, EXPAND_LISTMATCH_RHS.
224 New expansion conditions, "inlist", "inlisti".
226 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
228 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
230 PP/14 fix log_write() format string regression from TF/03.
231 Bugzilla 1152. Patch from Dmitry Isaikin.
237 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
239 PP/02 Harmonised TLS library version reporting; only show if debugging.
240 Layout now matches that introduced for other libraries in 4.74 PP/03.
242 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
244 PP/04 New "dns_use_edns0" global option.
246 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
249 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
250 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
252 TK/01 Updated PolarSSL code to 0.14.2.
253 Bugzilla 1097. Patch from Andreas Metzler.
255 PP/07 Catch divide-by-zero in ${eval:...}.
258 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
261 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
262 format-string attack -- SECURITY: remote arbitrary code execution.
264 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
265 time unintentionally subject to list matching rules, letting the header
266 cause arbitrary Exim lookups (of items which can occur in lists, *not*
267 arbitrary string expansion). This allowed for information disclosure.
269 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
270 INT_MIN/-1 -- value coerced to INT_MAX.
276 NM/01 Workround for PCRE version dependency in version reporting
279 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
280 This fixes portability to compilers other than gcc, notably
281 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
283 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
284 makefiles for portability to HP-UX and POSIX correctness.
286 PP/01 Permit LOOKUP_foo enabling on the make command-line.
287 Also via indented variable definition in the Makefile.
288 (Debugging by Oliver Heesakkers).
290 PP/02 Restore caching of spamd results with expanded spamd_address.
291 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
293 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
294 Improves build reliability. Fix from: Frank Elsner
296 NM/02 Fix wide character breakage in the rfc2047 coding
297 Fixes bug 1064. Patch from Andrey N. Oktyabrski
299 NM/03 Allow underscore in dnslist lookups
300 Fixes bug 1026. Patch from Graeme Fowler
302 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
303 Code patches from Adam Ciarcinski of NetBSD.
305 NM/04 Fixed exiqgrep to cope with mailq missing size issue
308 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
309 is logged, to avoid truncation. Patch from John Horne.
311 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
312 Patch from Jakob Hirsch.
314 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
315 SQL string expansion failure details.
316 Patch from Andrey Oktyabrski.
318 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
319 Patch from Simon Arlott.
321 PP/09 New lookups functionality failed to compile on old gcc which rejects
322 extern declarations in function scope.
323 Patch from Oliver Fleischmann
325 PP/10 Use sig_atomic_t for flags set from signal handlers.
326 Check getgroups() return and improve debugging.
327 Fixed developed for diagnosis in bug 927 (which turned out to be
330 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
331 Patch from Mark Zealey.
333 PP/12 Bugzilla 1056: Improved spamd server selection.
334 Patch from Mark Zealey.
336 PP/13 Bugzilla 1086: Deal with maildir quota file races.
337 Based on patch from Heiko Schlittermann.
339 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
340 Patch from Uwe Doering, sign-off by Michael Haardt.
342 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
343 variable declaration deep within a block. Bug and patch from
346 PP/15 lookups-Makefile IRIX compatibilty coercion.
348 PP/16 Make DISABLE_DKIM build knob functional.
350 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
351 Patch by Simon Arlott
353 TF/03 Fix valgrind.h portability to C89 compilers that do not support
354 variable argument macros. Our copy now differs from upstream.
360 TF/01 Failure to get a lock on a hints database can have serious
361 consequences so log it to the panic log.
363 TF/02 Log LMTP confirmation messages in the same way as SMTP,
364 controlled using the smtp_confirmation log selector.
366 TF/03 Include the error message when we fail to unlink a spool file.
368 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
369 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
370 for maintaining out-of-tree patches for some time.
372 PP/01 Bugzilla 139: Documentation and portability issues.
373 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
374 Handle per-OS dynamic-module compilation flags.
376 PP/02 Let /dev/null have normal permissions.
377 The 4.73 fixes were a little too stringent and complained about the
378 permissions on /dev/null. Exempt it from some checks.
379 Reported by Andreas M. Kirchwitz.
381 PP/03 Report version information for many libraries, including
382 Exim version information for dynamically loaded libraries. Created
383 version.h, now support a version extension string for distributors
384 who patch heavily. Dynamic module ABI change.
386 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
387 privilege escalation vulnerability whereby the Exim run-time user
388 can cause root to append content of the attacker's choosing to
391 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
394 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
395 If dropping privileges for untrusted macros, we disabled normal logging
396 on the basis that it would fail; for the Exim run-time user, this is not
397 the case, and it resulted in successful deliveries going unlogged.
398 Fixed. Reported by Andreas Metzler.
404 PP/01 Date: & Message-Id: revert to normally being appended to a message,
405 only prepend for the Resent-* case. Fixes regression introduced in
406 Exim 4.70 by NM/22 for Bugzilla 607.
408 PP/02 Include check_rfc2047_length in configure.default because we're seeing
409 increasing numbers of administrators be bitten by this.
411 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
413 PP/03 Bugzilla 994: added openssl_options main configuration option.
415 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
417 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
419 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
421 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
422 without a peer certificate, leading to a segfault because of an
423 assumption that peers always have certificates. Be a little more
424 paranoid. Problem reported by Martin Tscholak.
426 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
427 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
428 NB: ClamAV planning to remove STREAM in "middle of 2010".
429 CL also introduces -bmalware, various -d+acl logging additions and
430 more caution in buffer sizes.
432 PP/09 Implemented reverse_ip expansion operator.
434 PP/10 Bugzilla 937: provide a "debug" ACL control.
436 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
438 PP/12 Bugzilla 973: Implement --version.
440 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
442 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
444 PP/15 Bugzilla 816: support multiple condition rules on Routers.
446 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
447 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
448 ignore trailing whitespace.
450 JJ/02 prevent non-panic DKIM error from being sent to paniclog
452 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
455 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
456 Notification from Dr Andrew Aitchison.
458 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
459 ExtendedDetectionInfo response format.
460 Notification from John Horne.
462 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
465 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
466 XSL and documented dependency on system catalogs, with examples of how
469 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
472 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
473 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
474 configuration file which is writeable by the Exim user or group.
476 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
477 of configuration files to cover files specified with the -C option if
478 they are going to be used with root privileges, not just the default
481 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
482 option (effectively making it always true).
484 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
485 files to be used while preserving root privileges.
487 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
488 that rogue child processes cannot use them.
490 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
491 run-time user, instead of root.
493 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
494 Exim run-time user without dropping privileges.
496 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
497 result string, instead of calling string_vformat() twice with the same
500 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
501 for other users. Others should always drop root privileges if they use
502 -C on the command line, even for a whitelisted configure file.
504 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
506 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
512 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
513 $data_path, and $header_path variables; fixed documentation bugs and
516 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
517 exipick to access non-standard spools, including the "frozen" queue
520 NM/01 Bugzilla 965: Support mysql stored procedures.
521 Patch from Alain Williams
523 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
525 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
526 Patch from Andreas Metzler
528 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
529 Patch from Kirill Miazine
531 NM/05 Bugzilla 671: Added umask to procmail example.
533 JJ/03 installed exipick 20100323.0, fixing doc bug
535 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
536 directory. Notification and patch from Dan Rosenberg.
538 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
540 TK/02 Improve log output when DKIM signing operation fails.
542 MH/01 Treat the transport option dkim_domain as a colon separated
543 list, not as a single string, and sign the message with each element,
544 omitting multiple occurences of the same signer.
546 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
547 Bugzilla 985, 986. Patch by Simon Arlott
549 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
550 Patch by Simon Arlott
552 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
553 MBX locking. Notification from Dan Rosenberg.
559 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
561 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
563 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
565 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
567 NM/04 Bugzilla 915: Flag broken perl installation during build.
573 TK/01 Added patch by Johannes Berg that expands the main option
574 "spamd_address" if it starts with a dollar sign.
576 TK/02 Write list of recipients to X-Envelope-Sender header when building
577 the mbox-format spool file for content scanning (suggested by Jakob
580 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
581 (http://www.dcc-servers.net/) support via dccifd. Activated by
582 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
584 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
585 by Mark Daniel Reidel <mr@df.eu>.
587 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
588 When building exim an external PCRE library is now needed -
589 PCRE is a system library on the majority of modern systems.
590 See entry on PCRE_LIBS in EDITME file.
592 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
593 conversation. Added nologin parameter to request.
594 Patch contributed by Kirill Miazine.
596 TF/01 Do not log submission mode rewrites if they do not change the address.
598 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
600 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
601 log files in place. Contributed by Roberto Lima.
603 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
605 TF/03 Bugzilla 615: When checking the local_parts router precondition
606 after a local_part_suffix or local_part_prefix option, Exim now
607 does not use the address's named list lookup cache, since this
608 contains cached lookups for the whole local part.
610 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
611 Robert Millan. Documentation is in experimental-spec.txt.
613 TF/04 Bugzilla 668: Fix parallel build (make -j).
615 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
617 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
618 Patch provided by Jan Srzednicki.
620 TF/05 Leading white space used to be stripped from $spam_report which
621 wrecked the formatting. Now it is preserved.
623 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
624 that they are available at delivery time.
626 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
628 TF/08 TLS error reporting now respects the incoming_interface and
629 incoming_port log selectors.
631 TF/09 Produce a more useful error message if an SMTP transport's hosts
632 setting expands to an empty string.
634 NM/06 Bugzilla 744: EXPN did not work under TLS.
635 Patch provided by Phil Pennock.
637 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
638 Patch provided by Richard Godbee.
640 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
641 acl_smtp_notquit, added index entry.
643 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
644 Patch provided by Eugene Bujak.
646 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
647 accept(). Patch provided by Maxim Dounin.
649 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
650 Patch provided by Phil Pennock.
652 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
654 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
655 Patch provided by Brad "anomie" Jorsch.
657 NM/14 Bugzilla 622: Added timeout setting to transport filter.
658 Patch provided by Dean Brooks.
660 TK/05 Add native DKIM support (does not depend on external libraries).
662 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
663 Patch provided by Graeme Fowler.
665 NM/16 Bugzilla 851: Documentation example syntax fix.
667 NM/17 Changed NOTICE file to remove references to embedded PCRE.
669 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
672 NM/19 Bugzilla 745: TLS version reporting.
673 Patch provided by Phil Pennock.
675 NM/20 Bugzilla 167: bool: condition support.
676 Patch provided by Phil Pennock.
678 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
679 clients. Patch provided by Phil Pennock.
681 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
682 Patch provided by Brad "anomie" Jorsch.
684 NM/23 Bugzilla 687: Fix misparses in eximstats.
685 Patch provided by Heiko Schlittermann.
687 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
688 Patch provided by Heiko Schlittermann.
690 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
691 plus update to original patch.
693 NM/26 Bugzilla 799: Documentation correction for ratelimit.
695 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
696 Patch provided by David Brownlee.
698 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
700 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
702 NM/30 Bugzilla 888: TLS documentation bugfixes.
704 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
706 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
707 Unlike the original bugzilla I have changed all shell scripts in src tree.
709 NM/33 Bugzilla 898: Transport filter timeout fix.
710 Patch by Todd Rinaldo.
712 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
713 Patch by Serge Demonchaux.
715 NM/35 Bugzilla 39: Base64 decode bug fixes.
716 Patch by Jakob Hirsch.
718 NM/36 Bugzilla 909: Correct connect() call in dcc code.
720 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
722 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
724 NM/39 Bugzilla 911: Fixed MakeLinks build script.
730 TK/01 Add preliminary DKIM support. Currently requires a forked version of
731 ALT-N's libdkim that I have put here:
732 http://duncanthrax.net/exim-experimental/
734 Note to Michael Haardt: I had to rename some vars in sieve.c. They
735 were called 'true' and it seems that C99 defines that as a reserved
736 keyword to be used with 'bool' variable types. That means you could
737 not include C99-style headers which use bools without triggering
738 build errors in sieve.c.
740 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
741 as mailq or other aliases. Changed the --help handling significantly
742 to do whats expected. exim_usage() emits usage/help information.
744 SC/01 Added the -bylocaldomain option to eximstats.
746 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
748 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
750 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
756 PH/01 Another patch from the Sieve maintainer.
758 PH/02 When an IPv6 address is converted to a string for single-key lookup
759 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
760 dots are used instead of colons so that keys in lsearch files need not
761 contain colons. This was done some time before quoting was made available
762 in lsearch files. However, iplsearch files do require colons in IPv6 keys
763 (notated using the quote facility) so as to distinguish them from IPv4
764 keys. This meant that lookups for IP addresses in host lists did not work
765 for iplsearch lookups.
767 This has been fixed by arranging for IPv6 addresses to be expressed with
768 colons if the lookup type is iplsearch. This is not incompatible, because
769 previously such lookups could never work.
771 The situation is now rather anomolous, since one *can* have colons in
772 ordinary lsearch keys. However, making the change in all cases is
773 incompatible and would probably break a number of configurations.
775 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
778 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
779 conversion specification without a maximum field width, thereby enabling
780 a rogue spamd server to cause a buffer overflow. While nobody in their
781 right mind would setup Exim to query an untrusted spamd server, an
782 attacker that gains access to a server running spamd could potentially
783 exploit this vulnerability to run arbitrary code as the Exim user.
785 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
786 $primary_hostname instead of what libspf2 thinks the hosts name is.
788 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
789 a directory entry by the name of the lookup key. Previously, if a
790 symlink pointed to a non-existing file or a file in a directory that
791 Exim lacked permissions to read, a lookup for a key matching that
792 symlink would fail. Now it is enough that a matching directory entry
793 exists, symlink or not. (Bugzilla 503.)
795 PH/03 The body_linecount and body_zerocount variables are now exported in the
798 PH/04 Added the $dnslist_matched variable.
800 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
801 This means they are set thereafter only if the connection becomes
804 PH/06 Added the client_condition to authenticators so that some can be skipped
805 by clients under certain conditions.
807 PH/07 The error message for a badly-placed control=no_multiline_responses left
808 "_responses" off the end of the name.
810 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
812 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
813 (without spaces) instead of just copying the configuration text.
815 PH/10 Added the /noupdate option to the ratelimit ACL condition.
817 PH/11 Added $max_received_linelength.
819 PH/12 Added +ignore_defer and +include_defer to host lists.
821 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
822 way in which PCRE > 7.0 is built.
824 PH/14 Implemented queue_only_load_latch.
826 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
827 MAIL command. The effect was to mangle the value on 64-bit systems.
829 PH/16 Another patch from the Sieve maintainer.
831 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
833 PH/18 If a system quota error occurred while trying to create the file for
834 a maildir delivery, the message "Mailbox is full" was not appended to the
835 bounce if the delivery eventually timed out. Change 4.67/27 below applied
836 only to a quota excession during the actual writing of the file.
838 PH/19 It seems that peer DN values may contain newlines (and other non-printing
839 characters?) which causes problems in log lines. The DN values are now
840 passed through string_printing() before being added to log lines.
842 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
843 and InterBase are left for another time.)
845 PH/21 Added message_body_newlines option.
847 PH/22 Guard against possible overflow in moan_check_errorcopy().
849 PH/23 POSIX allows open() to be a macro; guard against that.
851 PH/24 If the recipient of an error message contained an @ in the local part
852 (suitably quoted, of course), incorrect values were put in $domain and
853 $local_part during the evaluation of errors_copy.
859 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
860 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
863 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
864 issue a MAIL command.
866 PH/02 In an ACL statement such as
868 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
870 if a client was not listed at all, or was listed with a value other than
871 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
872 the condition was not true (as it should be), so access was not denied.
873 The bug was that the ! inversion was incorrectly passed on to the second
874 item. This has been fixed.
876 PH/03 Added additional dnslists conditions == and =& which are different from
877 = and & when the dns lookup returns more than one IP address.
879 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
880 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
882 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
883 FSYNC, which compiles an option called disable_fsync that allows for
884 bypassing fsync(). The documentation is heavily laced with warnings.
886 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
888 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
889 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
890 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
891 including adding "make clean"; (3) Added -fPIC when compiling the test
892 dynamically loaded module, to get rid of a warning.
894 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
895 message fails, move_frozen_messages = true and ignore_bounce_errors_after
896 = 0s. The bug is otherwise harmless.
898 PH/07 There was a bug in the dovecot authenticator such that the value of
899 $auth1 could be overwritten, and so not correctly preserved, after a
900 successful authentication. This usually meant that the value preserved by
901 the server_setid option was incorrect.
903 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
905 PH/09 Installed PCRE release 7.0.
907 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
908 run for batched SMTP input. It is now run at the start of every message
909 in the batch. While fixing this I discovered that the process information
910 (output by running exiwhat) was not always getting set for -bs and -bS
911 input. This is fixed, and it now also says "batched" for BSMTP.
913 PH/11 Added control=no_pipelining.
915 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
916 patch, slightly modified), and move the expansion of helo_data till after
917 the connection is made in the smtp transport (so it can use these
920 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
922 PH/14 Added log_selector = +pid.
924 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
926 PH/16 Add ${if forany and ${if forall.
928 PH/17 Added dsn_from option to vary the From: line in DSNs.
930 PH/18 Flush SMTP output before performing a callout, unless control =
931 no_callout_flush is set.
933 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
934 was true (the default) a successful delivery failed to delete the retry
935 item, thus causing premature timeout of the address. The bug is now
938 PH/20 Added hosts_avoid_pipelining to the smtp transport.
940 PH/21 Long custom messages for fakedefer and fakereject are now split up
941 into multiline reponses in the same way that messages for "deny" and
942 other ACL rejections are.
944 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
945 with slight modification.
947 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
948 draft, changing the syntax and factoring some duplicate code".
950 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
951 for deliveries of the second and subsequent messages over the same SMTP
954 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
955 ${reduce, with only minor "tidies".
957 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
959 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
960 expansion side effects.
962 PH/27 When a message times out after an over-quota error from an Exim-imposed
963 quota, the bounce message says "mailbox is full". This message was not
964 being given when it was a system quota that was exceeded. It now should
967 MH/03 Made $recipients available in local_scan(). local_scan() already has
968 better access to the recipient list through recipients_list[], but
969 $recipients can be useful in postmaster-provided expansion strings.
971 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
972 in the case of a MAIL command with additional options following the
973 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
974 were accidentally chopped off.
976 PH/29 SMTP synchronization checks are implemented when a command is read -
977 there is a check that no more input is waiting when there shouldn't be
978 any. However, for some commands, a delay in an ACL can mean that it is
979 some time before the response is written. In this time, more input might
980 arrive, invalidly. So now there are extra checks after an ACL has run for
981 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
982 pipelining has not been advertised.
984 PH/30 MH's patch to allow iscntrl() characters to be list separators.
986 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
987 returned in the SMTP response when smtp_return_error_details was false.
990 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
991 instead of the C I/O that was originally supplied, because problems were
994 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
995 Exim which did not show up earlier: it was assuming that a call to
996 SSL_CTX_set_info_callback() might give an error value. In fact, there is
997 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
998 was a macro that became an assignment, so it seemed to work. This has
999 changed to a proper function call with a void return, hence the compile
1000 error. Exim's code has been fixed.
1002 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1005 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1007 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1009 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1010 because it turns out to be too big or there is a timeout) there is no
1011 "Completed" line in the log. When some messages of this type were
1012 selected by exigrep, they were listed as "not completed". Others were
1013 picked up by some special patterns. I have improved the selection
1014 criteria to be more general.
1016 PH/38 The host_find_failed option in the manualroute router can now be set
1017 to "ignore", to completely ignore a host whose IP address cannot be
1018 found. If all hosts are ignored, the behaviour is controlled by the new
1019 host_all_ignored option.
1021 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1022 homing or because of multiple MX records with /mx) generated more than
1023 one IP address, and the following item turned out to be the local host,
1024 all the secondary addresses of the first item were incorrectly removed
1025 from the list, along with the local host and any following hosts (which
1026 is what is supposed to happen).
1028 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1029 whoever called Exim into the -H file. In the case of the daemon it was
1030 behaving confusingly. When first started, it used values for whoever
1031 started the daemon, but after a SIGHUP it used the Exim user (because it
1032 calls itself on a restart). I have changed the code so that it now always
1035 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1036 message are rejected with the same error (e.g. no authentication or bad
1037 sender address), and a DATA command is nevertheless sent (as can happen
1038 with PIPELINING or a stupid MUA), the error message that was given to the
1039 RCPT commands is included in the rejection of the DATA command. This is
1040 intended to be helpful for MUAs that show only the final error to their
1043 PH/42 Another patch from the Sieve maintainer.
1045 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1046 Eximstats - Fixed some broken HTML links and added missing column headers
1048 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1049 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1051 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1053 PH/43 Yet another patch from the Sieve maintainer.
1055 PH/44 I found a way to check for a TCP/IP connection going away before sending
1056 the response to the final '.' that terminates a message, but only in the
1057 case where the client has not sent further data following the '.'
1058 (unfortunately, this is allowed). However, in many cases there won't be
1059 any further data because there won't be any more messages to send. A call
1060 to select() can be used: if it shows that the input is "ready", there is
1061 either input waiting, or the socket has been closed. An attempt to read
1062 the next input character can distinguish the two cases. Previously, Exim
1063 would have sent an OK response which the client would never have see.
1064 This could lead to message repetition. This fix should cure that, at
1065 least in a lot of common cases.
1067 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1068 advertised in response to EHLO.
1074 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1075 fixed by 4.65/MH/01 (is this a record?) are fixed:
1077 (i) An empty string was always treated as zero by the numeric comparison
1078 operators. This behaviour has been restored.
1080 (ii) It is documented that the numeric comparison operators always treat
1081 their arguments as decimal numbers. This was broken in that numbers
1082 starting with 0 were being interpreted as octal.
1084 While fixing these problems I realized that there was another issue that
1085 hadn't been noticed. Values of message_size_limit (both the global option
1086 and the transport option) were treated as octal if they started with 0.
1087 The documentation was vague. These values are now always treated as
1088 decimal, and I will make that clear in the documentation.
1094 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1095 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1098 MH/01 Don't check that the operands of numeric comparison operators are
1099 integers when their expansion is in "skipping" mode (fixes bug
1100 introduced by 4.64-PH/07).
1102 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1103 child addresses, Exim now panics and dies. Previously, because the count
1104 is held in a short int, deliveries were likely to be lost. As such a
1105 large number of recipients for a single message is ridiculous
1106 (performance will be very, very poor), I have chosen to impose a limit
1107 rather than extend the field.
1113 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1114 leftover -K file (the existence of which was triggered by #402).
1115 While we were at it, introduced process PID as part of the -K
1116 filename. This should rule out race conditions when creating
1119 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1120 processing considerably. Previous code took too long for large mails,
1121 triggering a timeout which in turn triggers #401.
1123 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1124 in the DK code in transports.c. sendfile() is not really portable,
1125 hence the _LINUX specificness.
1127 TF/01 In the add_headers option to the mail command in an Exim filter,
1128 there was a bug that Exim would claim a syntax error in any
1129 header after the first one which had an odd number of characters
1132 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1133 callout verification, Exim cached a "reject" for the entire domain. This
1134 is correct for most verifications, but it is not correct for a recipient
1135 verification with use_sender or use_postmaster set, because in that case
1136 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1137 case of MAIL FROM:<> rejection from other early rejections (e.g.
1138 rejection of HELO). When verifying a recipient using a non-null MAIL
1139 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1140 Whatever the result of the callout, the value of the domain cache is
1141 left unchanged (for any other kind of callout, getting as far as trying
1142 RCPT means that the domain itself is ok).
1144 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1147 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1148 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1149 session, the daemon ignores ECONNECT errors and logs others; it now
1150 ignores EPIPE as well.
1152 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1153 (quoted-printable decoding).
1155 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1156 later the small subsequent patch to fix an introduced bug.
1158 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1160 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1162 PH/08 An error is now given if message_size_limit is specified negative.
1164 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1165 to be given (somewhat) arbitrary names.
1167 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1170 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1171 miscellaneous code fixes
1173 PH/10 Added the log_reject_target ACL modifier to specify where to log
1176 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1177 hostname. This is wrong, because it relates to the incoming message (and
1178 probably the interface on which it is arriving) and not to the outgoing
1179 callout (which could be using a different interface). This has been
1180 changed to use the value of the helo_data option from the smtp transport
1181 instead - this is what is used when a message is actually being sent. If
1182 there is no remote transport (possible with a router that sets up host
1183 addresses), $smtp_active_hostname is used.
1185 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1186 tweaks were necessary in order to get it to work (see also 21 below):
1187 (a) The code assumed that strncpy() returns a negative number on buffer
1188 overflow, which isn't the case. Replaced with Exim's string_format()
1190 (b) There were several signed/unsigned issues. I just did the minimum
1191 hacking in of casts. There is scope for a larger refactoring.
1192 (c) The code used strcasecmp() which is not a standard C function.
1193 Replaced with Exim's strcmpic() function.
1194 (d) The code set only $1; it now sets $auth1 as well.
1195 (e) A simple test gave the error "authentication client didn't specify
1196 service in request". It would seem that Dovecot has changed its
1197 interface. Fortunately there's a specification; I followed it and
1198 changed what the client sends and it appears to be working now.
1200 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1203 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1204 address A is aliased to B and C, where B exists and C does not. Without
1205 -v the output is "A verified" because verification stops after a
1206 successful redirection if more than one address is generated. However,
1207 with -v the child addresses are also verified. Exim was outputting "A
1208 failed to verify" and then showing the successful verification for C,
1209 with its parentage. It now outputs "B failed to verify", showing B's
1210 parentage before showing the successful verification of C.
1212 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1213 look up a TXT record in a specific list after matching in a combined
1216 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1217 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1218 they consult the DNS. I had assumed they would set it the way they
1219 wanted; and indeed my experiments on Linux seem to show that in some
1220 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1221 To be on the safe side, however, I have now made the interface to
1222 host_find_byname() similar to host_find_bydns(), with an argument
1223 containing the DNS resolver options. The host_find_byname() function now
1224 sets these options at its start, just as host_find_bydns() does. The smtp
1225 transport options dns_qualify_single and dns_search_parents are passed to
1226 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1227 of host_find_byname() use the default settings of RES_DEFNAMES
1228 (qualify_single) but not RES_DNSRCH (search_parents).
1230 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1231 spool_read_header() do less string testing, by means of a preliminary
1232 switch on the second character of optional "-foo" lines. (This is
1233 overdue, caused by the large number of possibilities that now exist.
1234 Originally there were few.) While I was there, I also converted the
1235 str(n)cmp tests so they don't re-test the leading "-" and the first
1236 character, in the hope this might squeeze out yet more improvement.
1238 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1239 flag allowing group syntax was set by the header_syntax check but not
1240 turned off, possible causing trouble later; (2) The flag was not being
1241 set at all for the header_verify test, causing "group"-style headers to
1242 be rejected. I have now set it in this case, and also caused header_
1243 verify to ignore an empty address taken from a group. While doing this, I
1244 came across some other cases where the code for allowing group syntax
1245 while scanning a header line wasn't quite right (mostly, not resetting
1246 the flag correctly in the right place). These bugs could have caused
1247 trouble for malformed header lines. I hope it is now all correct.
1249 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1250 with the "reply" argument non-NULL. The code, however (which originally
1251 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1252 but it didn't always do it. This confused somebody who was copying the
1253 code for some other use. I have removed all the tests.
1255 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1256 feature that was used to support insecure browsers during the U.S. crypto
1257 embargo. It requires special client support, and Exim is probably the
1258 only MTA that supported it -- and would never use it because real RSA is
1259 always available. This code has been removed, because it had the bad
1260 effect of slowing Exim down by computing (never used) parameters for the
1261 RSA_EXPORT functionality.
1263 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1264 authenticator to fail if there's a tab character in the incoming data
1265 (there should never be unless someone is messing about, as it's supposed
1266 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1267 if the connection is using TLS or if the remote IP is the same as the
1268 local IP, and the "valid-client-cert option" if a client certificate has
1271 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1272 authenticators. This can be used for authorization after authentication
1273 succeeds. (In the case of plaintext, it servers for both authentication
1276 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1277 if any retry times were supplied.
1279 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1280 connection, where there is no client IP address to check. In this
1281 situation, the verify now always succeeds.
1283 PH/25 Applied John Jetmore's -Mset patch.
1285 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1287 PH/27 In a string expansion for a processed (not raw) header when multiple
1288 headers of the same name were present, leading whitespace was being
1289 removed from all of them, but trailing whitespace was being removed only
1290 from the last one. Now trailing whitespace is removed from each header
1291 before concatenation. Completely empty headers in a concatenation (as
1292 before) are ignored.
1294 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1295 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1297 PH/29 [Removed. This was a change that I later backed out, and forgot to
1298 correct the ChangeLog entry (that I had efficiently created) before
1299 committing the later change.]
1301 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1302 address errors (4xx response to RCPT) over the same connection as other
1303 messages routed to the same hosts. Such deliveries are always "forced",
1304 so retry times are not inspected. This resulted in far too many retries
1305 for the affected addresses. The effect occurred only when there were more
1306 hosts than the hosts_max_try setting in the smtp transport when it had
1307 the 4xx errors. Those hosts that it had tried were not added to the list
1308 of hosts for which the message was waiting, so if all were tried, there
1309 was no problem. Two fixes have been applied:
1311 (i) If there are any address or message errors in an SMTP delivery, none
1312 of the hosts (tried or untried) are now added to the list of hosts
1313 for which the message is waiting, so the message should not be a
1314 candidate for sending over the same connection that was used for a
1315 successful delivery of some other message. This seems entirely
1316 reasonable: after all the message is NOT "waiting for some host".
1317 This is so "obvious" that I'm not sure why it wasn't done
1318 previously. Hope I haven't missed anything, but it can't do any
1319 harm, as the worst effect is to miss an optimization.
1321 (ii) If, despite (i), such a delivery is accidentally attempted, the
1322 routing retry time is respected, so at least it doesn't keep
1323 hammering the server.
1325 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1326 in ${readsocket because some servers need this prod.
1328 PH/32 Added some extra debug output when updating a wait-xxx database.
1330 PH/33 The hint "could be header name not terminated by colon", which has been
1331 given for certain expansion errors for a long time, was not being given
1332 for the ${if def:h_colon_omitted{... case.
1334 PH/34 The spec says: "With one important exception, whenever a domain list is
1335 being scanned, $domain contains the subject domain." There was at least
1336 one case where this was not true.
1338 PH/35 The error "getsockname() failed: connection reset by peer" was being
1339 written to the panic log as well as the main log, but it isn't really
1340 panic-worthy as it just means the connection died rather early on. I have
1341 removed the panic log writing for the ECONNRESET error when getsockname()
1344 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1345 runs only) independently of the message's sender address. This meant
1346 that, if the 4xx error was in fact related to the sender, a different
1347 message to the same recipient with a different sender could confuse
1348 things. In particualar, this can happen when sending to a greylisting
1349 server, but other circumstances could also provoke similar problems.
1350 I have changed the default so that the retry time for these errors is now
1351 based a combination of the sender and recipient addresses. This change
1352 can be overridden by setting address_retry_include_sender=false in the
1355 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1356 remote server are returned as part of bounce messages. This was not
1357 happening for LMTP over a pipe (the lmtp transport), but now it is the
1358 same for both kinds of LMTP.
1360 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1361 in header lines that were in fact CNAMEs. This is no longer the case.
1363 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1364 and queue runs started by the daemon processed all messages. This has
1365 been fixed so that -R and -S can now usefully be given with -q<time>.
1367 PH/40 Import PCRE release 6.7 (fixes some bugs).
1369 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1371 PH/42 Give an error if -q is specified more than once.
1373 PH/43 Renamed the variables $interface_address and $interface_port as
1374 $received_ip_address and $received_port, to make it clear that these
1375 values apply to message reception, and not to the outgoing interface when
1376 a message is delivered. (The old names remain recognized, of course.)
1378 PH/44 There was no timeout on the connect() call when using a Unix domain
1379 socket in the ${readsocket expansion. There now is.
1381 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1382 be meaningful with "accept".
1384 SC/01 Eximstats V1.43
1385 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1387 SC/02 Eximstats V1.44
1388 Use a glob alias rather than an array ref in the generated
1389 parser. This improves both readability and performance.
1391 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1392 Collect SpamAssassin and rejection statistics.
1393 Don't display local sender or destination tables unless
1394 there is data to show.
1395 Added average volumes into the top table text output.
1397 SC/04 Eximstats V1.46
1398 Collect data on the number of addresses (recipients)
1399 as well as the number of messages.
1401 SC/05 Eximstats V1.47
1402 Added 'Message too big' to the list of mail rejection
1403 reasons (thanks to Marco Gaiarin).
1405 SC/06 Eximstats V1.48
1406 Mainlog lines which have GMT offsets and are too short to
1407 have a flag are now skipped.
1409 SC/07 Eximstats V1.49 (Alain Williams)
1410 Added the -emptyok flag.
1412 SC/08 Eximstats V1.50
1413 Fixes for obtaining the IP address from reject messages.
1415 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1416 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1417 whitesspace changes from 4.64-PH/27
1419 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1422 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1423 are found, allow negative numbers in numeric criteria)
1425 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1427 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1428 to match changes made in 4.64-PH/43
1430 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1432 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1433 "domain" is actually an IP address, and force a failure. This locks out
1434 those revolvers/nameservers that support "A-for-A" lookups, in
1435 contravention of the specifications.
1437 PH/48 When a host name was looked up from an IP address, and the subsequent
1438 forward lookup of the name timed out, the host name was left in
1439 $sender_host_name, contrary to the specification.
1441 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1442 restricted to single-key lookups, Exim was not diagnosing an error if
1443 * or *@ was used with a query-style lookup.
1445 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1447 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1448 long ago, but noone interested enough thought of it. Let's just say that
1449 the "1.1" means that there are some new functions that weren't there at
1450 some point in the past.
1452 PH/51 Error processing for expansion failure of helo_data from an smtp
1453 transport during callout processing was broken.
1455 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1456 tested/used via the -bh/-bhc/-bs options.
1458 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1459 bug, fixed in subsequent PCRE releases).
1461 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1462 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1464 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1470 SC/01 Use a glob alias rather than an array ref in eximstats generated
1471 parser. This improves both readability and performance.
1473 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1474 Don't display local sender or destination tables in eximstats unless
1475 there is data to show.
1476 Added average volumes into the eximstats top table text output.
1478 SC/03 Collect data on the number of addresses (recipients) as well
1479 as the number of messages in eximstats.
1481 TF/01 Correct an error in the documentation for the redirect router. Exim
1482 does (usually) call initgroups() when daemonizing.
1484 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1485 with consistent privilege compared to when running as a daemon.
1487 TF/03 Note in the spec that $authenticated_id is not set for local
1488 submissions from trusted users.
1490 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1491 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1493 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1494 by adding some example configuration directives to the default
1495 configuration file. A little bit of work is required to uncomment the
1496 directives and define how usernames and passwords are checked, but
1497 there is now a framework to start from.
1499 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1500 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1501 without this. I don't know how relevant this is to other LDAP libraries.
1503 PH/02 Add the verb name to the "unknown ACL verb" error.
1505 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1507 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1509 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1510 directory not expanded when it should be if an expanded home directory
1511 was set for the address (which is overridden by the transport).
1513 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1516 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1517 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1518 because it is too late at that time, and has no effect.
1520 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1521 security issue with \' (bugzilla #107). I could not use the
1522 PQescapeStringConn() function, because it needs a PGconn value as one of
1525 PH/08 When testing addresses using -bt, indicate those final addresses that
1526 are duplicates that would not cause an additional delivery. At least one
1527 person was confused, thinking that -bt output corresponded to deliveries.
1528 (Suppressing duplicates isn't a good idea as you lose the information
1529 about possibly different redirections that led to the duplicates.)
1531 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1532 systems where poll() doesn't work, in particular OS X.
1534 PH/10 Added more information to debugging output for retry time not reached.
1536 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1537 operations in malware.c.
1539 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1542 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1543 syslog_duplication set false, log lines that would normally be written
1544 both the the main log and to the reject log were not written to syslog at
1547 PH/14 In the default configuration, change the use of "message" in ACL warn
1548 statements to "add_header".
1550 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1551 not followed by a command (e.g. "seen endif").
1553 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1554 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1557 PH/17 Added extra conditions to the default value of delay_warning_condition
1561 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1562 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1563 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1566 The Auto-Submitted: and various List- headers are standardised, whereas I
1567 don't think Precedence: ever was.
1569 PH/18 Refactored debugging code in route_finduser() to show more information,
1570 in particular, the error code if getpwnam() issues one.
1572 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1573 This is apparently needed in addition to the PH/07 change above to avoid
1574 any possible encoding problems.
1576 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1577 but not after initializing Perl.
1579 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1580 output them only if debugging. By default they are written stderr,
1581 apparently, which is not desirable.
1583 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1586 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1589 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1591 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1592 authenticated or an ident call has been made. Suppress the default
1593 values for $authenticated_id and $authenticated_sender (but permit -oMai
1594 and -oMas) when testing with -bh.
1596 PH/24 Re-jigged the order of the tests in the default configuration so that the
1597 tests for valid domains and recipients precede the DNS black list and CSA
1598 tests, on the grounds that those ones are more expensive.
1600 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1601 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1602 This bug exists in every version of Exim that I still have, right back to
1605 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1606 However, an attempt to turn on case-sensitivity in a regex key by
1607 including (?-i) didn't work because the subject string was already
1608 lowercased, and the effects were non-intuitive. It turns out that a
1609 one-line patch can be used to allow (?-i) to work as expected.
1615 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1616 other effects) broke the use of negated acl sub-conditions.
1618 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1621 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1622 "Deny" causes Exim to reject the incoming connection with a 554 error.
1623 Unfortunately, if there is a major crisis, such as a disk failure,
1624 tcp-wrappers gives "deny", whereas what one would like would be some
1625 kind of temporary error. A kludge has been added to help with this.
1626 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1627 554 error is used if errno is still zero or contains ENOENT (which occurs
1628 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1631 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1633 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1634 errors. Otherwise a message that provokes a temporary error (when other
1635 messages do not) can cause a whole host to time out.
1637 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1638 addresses were routed directly to files or pipes from a redirect router.
1639 File deliveries just didn't batch; pipe deliveries might have suffered
1642 PH/06 A failure to get a lock for a hints database would erroneously always say
1643 "Failed to get write lock", even when it was really a read lock.
1645 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1646 of 0600. This has been changed to use the value of the lockfile_mode
1647 option (which defaults to 0600).
1649 PH/08 Applied small patch from the Sieve maintainer.
1651 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1652 folder from quota calculations, a direct delivery into this folder messed
1653 up the contents of the maildirsize file. This was because the regex was
1654 used only to exclude .Trash (or whatever) when the size of the mailbox
1655 was calculated. There was no check that a delivery was happening into an
1656 excluded directory. This bug has been fixed by ignoring all quota
1657 processing for deliveries into excluded directories.
1659 PH/10 Added the maildirfolder_create_regex option to appendfile.
1665 PH/01 The code for finding all the local interface addresses on a FreeBSD
1666 system running IPv6 was broken. This may well have applied to all BSD
1667 systems, as well as to others that have similar system calls. The broken
1668 code found IPv4 interfaces correctly, but gave incorrect values for the
1669 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1670 that it would not match correctly against @[] and not recognize the IPv6
1673 PH/02 The ipliteral router was not recognizing addresses of the form user@
1674 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1676 PH/03 Added disable_ipv6.
1678 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1679 decoded form, because it is most often used to construct To: headers
1680 lines in autoreplies, and the decoded form may well be syntactically
1681 invalid. However, $reply_address has leading white space removed, and all
1682 newlines turned into spaces so that the autoreply transport does not
1685 PH/05 If group was specified without a user on a router, and no group or user
1686 was specified on a transport, the group from the router was ignored.
1688 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1689 for visible compile-time settings that can be used to change these
1690 numbers, for those that want even more. Backwards compatibility with old
1691 spool files has been maintained. However, going back to a previous Exim
1692 release will lost any variables that are in spool files.
1694 PH/07 Two small changes when running in the test harness: increase delay when
1695 passing a TCP/IP connection to a new process, in case the original
1696 process has to generate a bounce, and remove special handling of
1697 127.0.0.2 (sic), which is no longer necessary.
1699 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1700 be the same on different OS.
1702 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1705 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1706 whether --show-vars was specified or not
1708 JJ/02 exipick: Added support for new ACL variable spool format introduced
1711 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1712 syntactically invalid From: or Reply-to: line, and a filter used this to
1713 generate an autoreply, and therefore failed to obtain an address for the
1714 autoreply, Exim could try to deliver to a non-existent relative file
1715 name, causing unrelated and misleading errors. What now happens is that
1716 it logs this as a hard delivery error, but does not attempt to create a
1719 PH/11 The exinext utility has a -C option for testing purposes, but although
1720 the given file was scanned by exinext itself; it wasn't being passed on
1721 when Exim was called.
1723 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1724 an end-of-file indication when reading a command response.
1726 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1727 compiled. In many other places in Exim, IPv6 addresses are always
1728 recognized, so I have changed this. It also means that IPv4 domain
1729 literals of the form [IPV4:n.n.n.n] are now always recognized.
1731 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1732 used if the router is not running as root, for example, when verifying at
1733 ACL time, or when using -bh. The debugging output from this situation was
1734 non-existent - all you got was a failure to exec. I have made two
1737 (a) Failures to set uid/gid, the current directory, or a process leader
1738 in a subprocess such as that created by queryprogram now generate
1739 suitable debugging ouput when -d is set.
1741 (b) The queryprogram router detects when it is not running as root,
1742 outputs suitable debugging information if -d is set, and then runs
1743 the subprocess without attempting to change uid/gid.
1745 PH/15 Minor change to Makefile for building test_host (undocumented testing
1748 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1749 additional section of a DNS packet that returns MX or SRV records.
1750 Instead, it always explicitly searches for A/AAAA records. This avoids
1751 major problems that occur when a DNS server includes only records of one
1752 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1753 fixed another bug: if SRV records were looked up and the corresponding
1754 address records were *not* found in the additional section, the port
1755 values from the SRV records were lost.
1757 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1758 using the correct key (the original address) when searching the retry
1759 rules in order to find which one to use for generating the retry hint.
1761 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1762 adding the default one. Similarly, if it contains a Reply-To: header, the
1763 errors_reply_to option, if set, is not used.
1765 PH/19 When calculating a retry time, Exim used to measure the "time since
1766 failure" by looking at the "first failed" field in the retry record. Now
1767 it does not use this if it is later than than the arrival time of the
1768 message. Instead it uses the arrival time. This makes for better
1769 behaviour in cases where some deliveries succeed, thus re-setting the
1770 "first failed" field. An example is a quota failure for a huge message
1771 when small messages continue to be delivered. Without this change, the
1772 "time since failure" will always be short, possible causing more frequent
1773 delivery attempts for the huge message than are intended.
1774 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1776 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1777 $1, $2, $3) because the numerical variables can be reset during some
1778 expansion items (e.g. "match"), thereby losing the authentication data.
1780 PH/21 Make -bV show the size of off_t variables so that the test suite can
1781 decide whether to run tests for quotas > 2G.
1783 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1784 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1785 filecount value is greater than 2G or if a quota value is greater than 2G
1786 on a system where the size of off_t is not greater than 4, a panic error
1789 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1790 never match. The debug and -bh output now contains an explicit error
1791 message indicating a malformed IPv4 address or mask.
1793 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1794 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1795 PH/23 above applies.
1797 PH/25 Do not write to syslog when running in the test harness. The only
1798 occasion when this arises is a failure to open the main or panic logs
1799 (for which there is an explicit test).
1801 PH/26 Added the /no_tell option to "control=freeze".
1803 PH/27 If a host name lookup failed very early in a connection, for example, if
1804 the IP address matched host_lookup and the reverse lookup yielded a name
1805 that did not have a forward lookup, an error message of the form "no IP
1806 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1807 could be logged. Now it outputs the IP address instead of "NULL".
1809 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1810 allows the sender and the authenticated sender to be set when
1811 submitting a message from within Exim. Since child_open_exim() is
1812 documented for local_scan(), the new function should be too.
1814 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1815 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1816 results in an empty string is now treated as unset.
1818 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1820 PH/31 Added sender_verify_fail logging option.
1822 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1823 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1824 tidied the source and removed it altogether.
1826 PH/33 When a queue run was abandoned because the load average was too high, a
1827 log line was always written; now it is written only if the queue_run log
1828 selector is set. In addition, the log line for abandonment now contains
1829 information about the queue run such as the pid. This is always present
1830 in "start" and "stop" lines but was omitted from the "abandon" line.
1832 PH/34 Omit spaces between a header name and the colon in the error message that
1833 is given when verify = headers_syntax fails (if there are lots of them,
1834 the message gets confusing).
1836 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1837 names, as there are now some PTR records that contain slashes. This check
1838 is only to protect against broken name servers that fall over on strange
1839 characters, so the fact that it applies to all lookups doesn't matter.
1841 PH/36 Now that the new test suite is complete, we can remove some of the
1842 special code in Exim that was needed for the old test suite. For example,
1843 sorting DNS records because real resolvers return them in an arbitrary
1844 order. The new test suite's fake resolver always returns records in the
1847 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1848 bounces) except when queue_only is set, to avoid logging races between
1849 the different processes.
1851 PH/38 Panic-die if .include specifies a non-absolute path.
1853 PH/39 A tweak to the "H" retry rule from its user.
1855 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1856 a label. They prevented compilation on older perls.
1858 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1859 a warning to be raised on newish perls.
1861 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1862 on queue. Changes to match documented behaviour of showing count of
1863 messages matching specified criteria.
1865 PH/40 Changed the default ident timeout from 30s to 5s.
1867 PH/41 Added support for the use of login_cap features, on those BSD systems
1868 that have them, for controlling the resources used by pipe deliveries.
1870 PH/42 The content-scanning code uses fopen() to create files in which to put
1871 message data. Previously it was not paying any attention to the mode of
1872 the files. Exim runs with umask(0) because the rest of the code creates
1873 files with open(), and sets the required mode explicitly. Thus, these
1874 files were ending up world-writeable. This was not a big issue, because,
1875 being within the spool directory, they were not world-accessible. I have
1876 created a function called modefopen, which takes an additional mode
1877 argument. It sets umask(777), creates the file, chmods it to the required
1878 mode, then resets the umask. All the relevant calls to fopen() in the
1879 content scanning code have been changed to use this function.
1881 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1882 to 24 hours. This avoids potential overflow problems when processing G
1883 and H retry rules. I suspect nobody ever tinkers with this value.
1885 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1887 PH/45 When the plaintext authenticator is running as a client, the server's
1888 challenges are checked to ensure they are valid base64 strings. By
1889 default, the authentication attempt is cancelled if an invalid string is
1890 received. Setting client_ignore_invalid_base64 true ignores these errors.
1891 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1892 they are received. Thus, the responses can be made to depend on the
1893 challenges. If an invalid string is ignored, an empty string is placed in
1896 PH/46 Messages that are created by the autoreply transport now contains a
1897 References: header, in accordance with RFCs 2822 and 3834.
1899 PH/47 Added authenticated_sender_force to the smtp transport.
1901 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1903 PH/49 Installed latest patch from the Sieve maintainer.
1905 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1906 was also set, the appendfile transport was unnecessarily scanning a
1907 directory of message files (e.g. for maildir delivery) to find the count
1908 of files (along with the size), even though it did not need this
1909 information. It now does the scan only if it needs to find either the
1910 size of the count of files.
1912 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1914 PH/52 Two bugs concerned with error handling when the smtp transport is
1917 (i) Exim was not creating retry information for temporary errors given
1918 for individual recipients after the DATA command when the smtp transport
1919 was used in LMTP mode. This meant that they could be retried too
1920 frequently, and not timed out correctly.
1922 (ii) Exim was setting the flag that allows error details to be returned
1923 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1924 recipients that were returned after the DATA command.
1926 PH/53 This is related to PH/52, but is more general: for any failing address,
1927 when detailed error information was permitted to be returned to the
1928 sender, but the error was temporary, then after the final timeout, only
1929 "retry timeout exceeded" was returned. Now it returns the full error as
1930 well as "retry timeout exceeded".
1932 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1933 do this, and (what is worse) MTAs that accept it.
1935 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1936 will now be deprecated.
1938 PH/56 New os.c-cygwin from the Cygwin maintainer.
1940 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1941 formats (previously only available in exim formats via -bpr, -bpru,
1942 and -bpra. Now also available in native and exiqgrep formats)
1944 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1945 with very large, slow to parse queues
1947 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1949 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1951 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1952 responses to authentication challenges, though it was showing the
1953 challenges; (ii) I've removed the CR characters from the debug output for
1956 PH/58 Allow for the insertion of a newline as well as a space when a string
1957 is turned into more than one encoded-word during RFC 2047 encoding. The
1958 Sieve code now uses this.
1960 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1961 data_4xx, lost_connection, tls_required.
1963 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1964 message was being sent as an SMTP response.
1966 PH/61 Add -l and -k options to exicyclog.
1968 PH/62 When verifying, if an address was redirected to one new address, so that
1969 verification continued, and the new address failed or deferred after
1970 having set something in $address_data, the value of $address_data was not
1971 passed back to the ACL. This was different to the case when no
1972 redirection occurred. The value is now passed back in both cases.
1974 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1975 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1976 use login_cap.h, so on its own it isn't the distinguishing feature. The
1977 new name refers directly to the setclassresources() function.
1979 PH/65 Added configuration files for NetBSD3.
1981 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1983 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1984 is preferred over IPv4.
1986 PH/68 The bounce_return_message and bounce_return_body options were not being
1987 honoured for bounces generated during the reception of non-SMTP messages.
1988 In particular, this applied to messages rejected by the ACL. This bug has
1989 been fixed. However, if bounce_return_message is true and bounce_return_
1990 body is false, the headers that are returned for a non-SMTP message
1991 include only those that have been read before the error was detected.
1992 (In the case of an ACL rejection, they have all been read.)
1994 PH/69 The HTML version of the specification is now built in a directory called
1995 spec_html instead of spec.html, because the latter looks like a path with
1996 a MIME-type, and this confuses some software.
1998 PH/70 Catch two compiler warnings in sieve.c.
2000 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2001 function verify_get_ident() calls ip_connect() to connect a socket, but
2002 if the "connect()" function timed out, ip_connect() used to close the
2003 socket. However, verify_get_ident() also closes the socket later, and in
2004 between Exim writes to the log, which may get opened at this point. When
2005 the socket was closed in ip_connect(), the log could get the same file
2006 descriptor number as the socket. This naturally causes chaos. The fix is
2007 not to close the socket in ip_connect(); the socket should be closed by
2008 the function that creates it. There was only one place in the code where
2009 this was missing, in the iplookup router, which I don't think anybody now
2010 uses, but I've fixed it anyway.
2012 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2013 well as to direct DNS lookups. Otherwise the handling of names in host
2014 lists is inconsistent and therefore confusing.
2020 PH/01 Two changes to the default runtime configuration:
2022 (1) Move the checks for relay_from_hosts and authenticated clients from
2023 after to before the (commented out) DNS black list checks.
2025 (2) Add control=submission to the relay_from_hosts and authenticated
2026 clients checks, on the grounds that messages accepted by these
2027 statements are most likely to be submissions.
2029 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2031 (1) Generate an error if the third argument for the ${prvs expansion is
2034 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2037 (3) Reset the variables that are obtained from the first argument of
2038 ${prvscheck and used in the second argument before leaving the code,
2039 because their memory is reclaimed, so using them afterwards may do
2042 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2043 one (it's much easier than Tom thought :-).
2045 (5) Because of (4), we can now allow for the use of $prvscheck_result
2046 inside the third argument.
2048 PH/03 For some reason, the default setting of PATH when running a command from
2049 a pipe transport was just "/usr/bin". I have changed it to
2052 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2053 anything to be listed in the output from -bV.
2055 PH/05 When a filter generated an autoreply, the entire To: header line was
2056 quoted in the delivery log line, like this:
2058 => >A.N.Other <ano@some.domain> <original@ddress> ...
2060 This has been changed so that it extracts the operative address. There
2061 may be more than one such address. If so, they are comma-separated, like
2064 => >ano@some.domain,ona@other.domain <original@ddress> ...
2066 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2067 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2068 not being looked up in the rDNS to get a host name, Exim was showing the
2069 IP address twice in Received: lines, even though the IP addresses were
2070 identical. For example:
2072 Received: from [1.2.3.4] (helo=[1.2.3.4])
2074 However, if the real host name was known, it was omitting the HELO data
2075 if it matched the actual IP address. This has been tidied up so that it
2076 doesn't show the same IP address twice.
2078 PH/07 When both +timestamp and +memory debugging was on, the value given by
2079 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2080 called by the debug printing, thereby overwriting the timestamp buffer.
2081 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2083 PH/08 When the original message was included in an autoreply transport, it
2084 always said "this is a copy of the message, including all the headers",
2085 even if body_only or headers_only was set. It now gives an appropriate
2088 PH/09 Applied a patch from the Sieve maintainer which:
2090 o fixes some comments
2091 o adds the (disabled) notify extension core
2092 o adds some debug output for the result of if/elsif tests
2093 o points to the current vacation draft in the documentation
2094 and documents the missing references header update
2098 o fixes a bug in processing the envelope test (when testing
2099 multiple envelope elements, the last element determinted the
2102 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2103 Electronic Mail") by including:
2105 Auto-submitted: auto-generated
2107 in the messages that it generates (bounce messages and others, such as
2108 warnings). In the case of bounce messages for non-SMTP mesages, there was
2109 also a typo: it was using "Auto_submitted" (underscore instead of
2110 hyphen). Since every message generated by Exim is necessarily in response
2111 to another message, thes have all been changed to:
2113 Auto-Submitted: auto-replied
2115 in accordance with these statements in the RFC:
2117 The auto-replied keyword:
2119 - SHOULD be used on messages sent in direct response to another
2120 message by an automatic process,
2122 - MUST NOT be used on manually-generated messages,
2124 - MAY be used on Delivery Status Notifications (DSNs) and Message
2125 Disposition Notifications (MDNs),
2127 - MUST NOT be used on messages generated by automatic or periodic
2128 processes, except for messages which are automatic responses to
2131 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2132 to the default Received: header definition.
2134 PH/12 Added log selector acl_warn_skipped (default on).
2136 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2137 variables because (a) they are in the wrong storage pool and (b) even if
2138 they were copied, it wouldn't work properly because of the caching.
2140 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2141 checking when decoding. Apparently there are clients that generate
2142 overlong encoded strings. Why am I not surprised?
2144 PH/15 If the first argument of "${if match_address" was not empty, but did not
2145 contain an "@" character, Exim crashed. Now it writes a panic log message
2146 and treats the condition as false.
2148 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2150 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2151 extension "envelope-auth". The code is finished and in agreement with
2152 other implementations, but there is no documentation so far and in fact,
2153 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2154 not changing the active code.
2156 Print executed "if" and "elsif" statements when debugging is used. This
2157 helps a great deal to understand what a filter does.
2159 Document more things not specified clearly in RFC3028. I had all this
2160 sorted out, when out of a sudden new issues came to my mind. Oops."
2162 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2165 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2166 canonical form (as documented). However, after a host name lookup from
2167 the IP address, check_host() was doing a simple string comparison with
2168 addresses acquired from the DNS when checking that the found name did
2169 have the original IP as one of its addresses. Since any found IPv6
2170 addresses are likely to be in abbreviated form, the comparison could
2171 fail. Luckily, there already exists a function for doing the comparison
2172 by converting both addresses to binary, so now that is used instead of
2173 the text comparison.
2175 PH/20 There was another similar case to PH/19, when a complete host name was
2176 given in a host list; looking up its IP address could give an abbreviated
2177 form, whereas the current host's name might or might not be abbreviated.
2178 The same fix has been applied.
2184 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2185 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2188 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2189 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2191 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2193 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2194 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2195 Also, for "Auto-Submitted", treat anything other than "no" as
2196 non-personal, in accordance with RFC 3834. (Previously it treated
2197 anything starting "auto-" as non-personal.)
2199 TF/01 The control=submission/name=... option had a problem with syntax
2200 errors if the name included a slash character. The /name= option
2201 now slurps the rest of the string, so it can include any characters
2202 but it must come last in the list of options (after /sender_retain
2205 PH/05 Some modifications to the interface to the fake nameserver for the new
2213 TK/01 Added the "success_on_redirect" address verification option. See
2214 NewStuff for rationale and an example.
2216 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2218 PH/02 Patch to exigrep to allow it to work on syslog lines.
2220 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2221 fread() to skip over the body file's header line, because in Cygwin the
2222 header line is locked and is inaccessible.
2224 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2225 co-exist for some time) to make it clear that it is the Exim ID that is
2226 referenced, not the Message-ID: header line.
2228 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2229 string_format() function, because snprintf() does not exist on all
2232 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2233 ${stat: expansion item.
2235 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2236 protocol synchronization error", to keep the pedants happy.
2238 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2239 well as for IRIX systems, when gcc is being used. See the host.c source
2242 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2244 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2247 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2248 transport and to the smtp transport in LMTP mode.
2250 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2252 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2253 run a filter in a subprocess. This could lead to confusion in subsequent
2254 lookups in the parent process. There should also be a search_tidyup() at
2255 the end of the subprocess.
2257 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2258 only if the host matched helo_try_verify_hosts, which caused the
2259 verification to occur when the EHLO/HELO command was issued. The ACL just
2260 tested the remembered result. Now, if a previous verification attempt has
2261 not happened, "verify = helo" does it there and then.
2263 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2265 TK/03 Fix log output including CR from clamd.
2267 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2268 exist provoked a memory error which could cause a segfault.
2270 PH/15 Installed PCRE 6.2
2272 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2274 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2275 of the problem. Specifically, suggested +O2 rather than +O1 for the
2278 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2280 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2281 record, the port was not correctly logged when the outgoing_port log
2282 selector was set (it logged the transort's default port).
2284 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2285 fallback_hosts, and "hosts" in the smtp transport.
2287 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2288 host errors such as "Connection refused".
2290 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2291 authentication with radiusclient 0.4.9:
2293 - Error returned from rc_read_config was caught wrongly
2294 - Username/password not passed on to radius server due to wrong length.
2296 The presumption is that some radiusclient API changes for 4.51/PH/17
2297 were not taken care of correctly. The code is still untested by me (my
2298 Linux distribution still has 0.3.2 of radiusclient), but it was
2299 contributed by a Radius user.
2301 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2302 expanding the "port" option of the smtp transport.
2304 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2305 while reading a MIME header. Thanks to Tom Hughes for a patch.
2307 PH/24 Include config.h inside local_scan.h so that configuration settings are
2310 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2311 that in an ACL for RCPT (for example), you can examine exactly what was
2314 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2315 commands, but it was not correctly comparing the address with the actual
2316 client host address. Thus, it would show the EHLO address in Received:
2317 header lines when this was not necessary.
2319 PH/27 Added the % operator to ${eval:}.
2321 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2322 it should be ignoring failures (because with -C, for example, it has lost
2323 privilege). It wasn't ignoring creation failures other than "already
2326 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2329 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2330 because an input line was too long, either on its own, or by virtue of
2331 too many continuations, the temporary file was not being removed, and the
2332 return code was incorrect.
2334 PH/31 Missing "BOOL" in function definition in filtertest.c.
2336 PH/32 Applied Sieve patches from the maintainer.
2338 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2340 PH/33 Added "verify = not_blind".
2342 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2343 Local/Makefile (with some defaults set). These are used in built scripts
2344 such as exicyclog, but they have never been used in the exim_install
2345 script (though there are many overriding facilities there). I have
2346 arranged that the exim_install script now takes note of these two
2349 PH/35 Installed configuration files for Dragonfly.
2351 PH/36 When a locally submitted message by a trusted user did not contain a
2352 From: header, and the sender address was obtained from -f or from an SMTP
2353 MAIL command, and the trusted user did not use -F to supply a sender
2354 name, $originator_name was incorrectly used when constructing a From:
2355 header. Furthermore, $originator_name was used for submission mode
2356 messages from external hosts without From: headers in a similar way,
2357 which is clearly wrong.
2359 PH/37 Added control=suppress_local_fixups.
2361 PH/38 When log_selector = +received_sender was set, and the addition of the
2362 sender made the log line's construction buffer exactly full, or one byte
2363 less than full, an overflow happened when the terminating "\n" was
2366 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2367 when the result of a list match is failure because a DNS lookup failed.
2369 PH/40 RM_COMMAND is now used in the building process.
2371 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2372 the "build-* directories that it finds.
2374 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2375 address in a domain literal was a prefix of an interface address.
2377 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2378 when verifying a sender address, unless rewrite_headers is false.
2380 PH/44 Wrote a long comment about why errors_to addresses are verified as
2381 recipients, not senders.
2383 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2384 the ratelimit ACL was added.
2386 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2388 PH/46 Added extra information about PostgreSQL errors to the error string.
2390 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2391 avoiding the need to install special zones in a real server. This is
2392 backwards compatible; if it can't find the fake resolver, it drops back.
2393 Thus, both old and new test suites can be run.
2395 TF/02 Added util/ratelimit.pl
2397 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2398 clock is set back in time.
2400 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2401 Candler <B.Candler@pobox.com>.
2403 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2404 OK for addresses that are the result of redirections.
2406 PH/48 A number of further additions for the benefit of the new test suite,
2407 including a fake gethostbyname() that interfaces to the fake DNS resolver
2410 TF/06 The fix for widen_domains has also been applied to qualify_single and
2411 search_parents which are the other dnslookup options that can cause
2414 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2417 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2419 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2420 service" if it encountered an MX record with an empty target hostname.
2421 The message is now "an MX or SRV record indicated no SMTP service".
2423 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2424 if the DNS of the sending site is misconfigured. This is quite a
2425 common situation. This change restores the behaviour of treating a
2426 helo verification defer as a failure.
2428 PH/51 If self=fail was set on a router, the bounce message did not include the
2429 actual error message.
2435 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2437 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2438 command itself ended in error, the underlying message about the transport
2439 filter timeout was being overwritten with the pipe command error. Now the
2440 underlying error message should be appended to the second error message.
2442 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2444 PH/02 Reduce the amount of output that "make" produces by default. Full output
2445 can still be requested.
2447 PH/03 The warning log line about a condition test deferring for a "warn" verb
2448 was being output only once per connection, rather than after each
2449 occurrence (because it was using the same function as for successful
2450 "warn" verbs). This seems wrong, so I have changed it.
2452 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2453 it should not have, which might have caused a crash in the right
2454 circumstances, but probably never did.
2456 PH/04 Installed a modified version of Tony Finch's patch to make submission
2457 mode fix the return path as well as the Sender: header line, and to
2458 add a /name= option so that you can make the user's friendly name appear
2461 TF/03 Added the control = fakedefer ACL modifier.
2463 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2464 Mark Lowes for thorough testing.
2466 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2468 TK/03 Merged latest SRS patch from Miles Wilton.
2470 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2471 with the definition in sysexits.h (which is #included earlier).
2472 Fortunately, Exim does not actually use EX_OK. The code used to try to
2473 preserve the sysexits.h value, by assumimg that macro definitions were
2474 scanned for macro replacements. I have been disabused of this notion,
2475 so now the code just undefines EX_OK before #including unistd.h.
2477 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2478 in the smtp transport. When a block could not be written in a single
2479 write() function, the timeout was being re-applied to each part-write.
2480 This seems wrong - if the receiver was accepting one byte at a time it
2481 would take for ever. The timeout is now adjusted when this happens. It
2482 doesn't have to be particularly precise.
2484 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2485 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2487 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2488 without a domain if the check to <postmaster@domain> fails.
2490 SC/01 Eximstats: added -xls and the ability to specify output files
2491 (patch written by Frank Heydlauf).
2493 SC/02 Eximstats: use FileHandles for outputing results.
2495 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2497 SC/04 Eximstats: fixed display of large numbers with -nvr option
2499 SC/05 Eximstats: fixed merging of reports with empty tables.
2501 SC/06 Eximstats: added the -include_original_destination flag
2503 SC/07 Eximstats: removed tabs and trailing whitespace.
2505 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2507 TK/06 MBOX spool code: Add real "From " MBOX separator line
2508 so the .eml file is really in mbox format (even though
2509 most programs do not really care). Patch from Alex Miller.
2511 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2512 The latter is generated from $received_to and is only set if the
2513 message has one envelope recipient. SA can use these headers,
2514 obviously out-of-the-box. Patch from Alex Miller.
2516 PH/08 The ${def test on a variable was returning false if the variable's
2517 value was "0", contrary to what the specification has always said!
2518 The result should be true unless the variable is empty.
2520 PH/09 The syntax error of a character other than { following "${if
2521 def:variable_name" (after optional whitespace) was not being diagnosed.
2522 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2523 accidental colon was present, for example, could give incorrect results.
2525 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2526 result is used (not including appendfile, where other changes are about
2529 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2530 This involved changing a lot of size variables from int to off_t. It
2531 should work with maildirs and everything.
2533 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2534 spamd dying while we are connected to it.
2536 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2539 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2540 function for BDB 4.3.
2542 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2544 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2545 the sources for PCRE have been re-arranged and more files are now
2548 PH/15 The code I had for printing potentially long long variables in PH/11
2549 above was not the best (it lost precision). The length of off_t variables
2550 is now inspected at build time, and an appropriate printing format (%ld
2551 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2552 to be "long long int" or "long int". This is needed for the internal
2553 formatting function string_vformat().
2555 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2556 the configuration file to be ":syslog", then the script "guesses" where
2557 the logs files are, rather than using the compiled in default. In our
2558 case the guess is not the same as the compiled default, so the script
2559 suddenly stopped working when I started to use syslog. The patch checks
2560 to see if log_file_path is "". If so, it attempts to read it from exim
2561 with no configuration file to get the compiled in version, before it
2562 falls back to the previous guessing code."
2564 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2565 implementing BATV in an Exim configuration. See NewStuff for the gory
2568 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2569 Makefile that are specific to HP-UX.
2571 PH/18 If the "use_postmaster" option was set for a recipient callout together
2572 with the "random" option, the postmaster address was used as the MAIL
2573 FROM address for the random test, but not for the subsequent recipient
2574 test. It is now used for both.
2576 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2577 patch removes a few documentation additions to RFC 3028, because the
2578 latest draft now contains them. It adds the new en;ascii-case comparator
2579 and a new error check for 8bit text in MIME parts. Comparator and
2580 require names are now matched exactly. I enabled the subaddress
2581 extension, but it is not well tested yet (read: it works for me)."
2583 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2584 rework some of the code of TK/09 above to avoid the hardwired use of
2585 "%lld" and "long long". Replaced the call to snprintf() with a call to
2588 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2589 records point to non-existent hosts", "retry timeout exceeded", and
2590 "retry time not reached for any host after a long failure period".
2592 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2593 experimental DomainKeys support:
2595 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2596 (2) On an error such as an illegally used "control", the wrong name for
2597 the control was given.
2599 These problems did NOT occur unless DomainKeys support was compiled.
2601 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2603 PH/24 Added ${if match_ip condition.
2605 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2606 databases so that it will be absolutely obvious if a crash occurs in the
2607 DB library. This is a regular occurrence (often caused by mis-matched
2610 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2611 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2612 picked up on a user's system that detects such things. There doesn't seem
2613 to be a gcc warning option for this - only an attribute that has to be
2614 put on the function's prototype. It seems that in Fedora Core 4 they have
2615 set this on a number of new functions. No doubt there will be more in due
2618 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2619 specify a transport. However, if an address that was verified by such a
2620 router was the subject of a callout, Exim crashed because it tried to
2621 read the rcpt_include_affixes from the non-existent transport. Now it
2622 just assumes that the setting of that option is false. This bug was
2623 introduced by 4.51/PH/31.
2625 PH/28 Changed -d+all to exclude +memory, because that information is very
2626 rarely of interest, but it makes the output a lot bigger. People tend to
2627 do -d+all out of habit.
2629 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2630 code in os-type was giving problems when libc.so lives in lib64, like on
2633 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2634 aren't the modern standard, and it seems that some systems' include files
2635 don't always have them. Exim was already checking for some of the newer
2636 ones like T_AAAA, and defining it itself. I've added checks for all the
2637 record types that Exim uses.
2639 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2640 not automatically generating a new one, as it is supposed to. This
2641 prevented TLS from working. If the file did exist, but contained invalid
2642 data, a new version was generated, as expected. It was only the case of a
2643 non-existent file that was broken.
2645 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2646 with a change in libdomainkeys > 0.64.
2648 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2649 from DNS. If the selector record carries the flag, it now has
2650 precedence over the domain-wide flag.
2652 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2654 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2655 the use of a port name that isn't defined in /etc/services) occurred, the
2656 message was deferred as in a normal delivery, and thus remained on the
2657 spool, instead of being failed because of the mua_wrapper setting. This
2658 is now fixed, and I tidied up some of the mua_wrapper messages at the
2661 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2662 the messages in a hash of arrays rather than using individual hashes.
2663 This is a bit cleaner and results in dramatic memory savings, albeit
2664 at a slight CPU cost.
2666 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2667 as requested by Marc Sherman.
2669 SC/10 Eximstats: added histograms for user specified patterns as requested
2672 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2674 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2675 fopen() in the content-scanning modules that did not already have it.
2681 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2682 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2684 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2686 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2688 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2689 to test Sieve filters that use "vacation".
2691 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2692 that changes the way the GnuTLS parameters are stored in the cache file.
2693 The new format can be generated externally. For backward compatibility,
2694 if the data in the cache doesn't make sense, Exim assumes it has read an
2695 old-format file, and it generates new data and writes a new file. This
2696 means that you can't go back to an older release without removing the
2699 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2700 work if there are any delivery delays because "one_time" forces the
2701 parent to be marked "delivered", so its unseen clone is never tried
2702 again. For this reason, Exim now forbids the simultaneous setting of
2705 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2706 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2707 entry if you want to know the details. The fix, however, neglected to
2708 consider the case when local delivery batching is involved. The test for
2709 "previously delivered" was not happening when checking to see if an
2710 address could be batched with a previous (undelivered) one; under
2711 certain circumstances this could lead to multiple deliveries to the same
2714 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2715 in its include files, and this causes problems building Exim.
2717 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2718 header_syntax) but Exim was just ignoring anything given after a slash.
2719 In particular, this caused confusion with an attempt to use "verify =
2720 reverse_host_lookup/defer_ok". An error is now given when options are
2721 supplied for verify items that do not have them. (Maybe reverse_host_
2722 lookup should have a defer_ok option, but that's a different point.)
2724 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2725 defined by RFC 821) to 2048, because there were problems with some AUTH
2726 commands, and RFC 1869 says the size should be increased for extended
2727 SMTP commands that take arguments.
2729 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2732 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2733 "unknown" error; now it says that the functionality isn't in the binary.
2735 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2736 an address' error message when a string expansion fails (syntax or
2737 whatever). Otherwise the password may appear in the log. Following change
2738 PH/42 below, there is no longer a chance of it appearing in a bounce
2741 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2743 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2744 of its addresses was ever tried. (Bugzilla bug #2.)
2746 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2747 the result incorrectly in the debug output. (It correctly added a newline
2748 to what was transported.)
2750 TF/01 Added $received_time.
2752 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2753 commented out examples of how to interface to a virus scanner and to
2754 SpamAssassin. Also added commented examples of av_scanner and
2755 spamd_address settings.
2757 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2758 and controls are allowed in which ACLs. There were a couple of minor
2759 errors. Some of the entries in the conditions table (which is a table of
2760 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2761 negation of where the condition IS allowed.
2763 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2765 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2766 header file does not have a version number, so I've had to invent a new
2767 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2768 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2769 radiusclient), but it was contributed by a Radius user.
2771 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2772 files or directories, for OpenSSL.
2774 PH/19 When an Exim process that is running as root has to create an Exim log
2775 file, it does so in a subprocess that runs as exim:exim so as to get the
2776 ownership right at creation (otherwise, other Exim processes might see
2777 the file with the wrong ownership). There was no test for failure of this
2778 fork() call, which would lead to the process getting stuck as it waited
2779 for a non-existent subprocess. Forks do occasionally fail when resources
2780 run out. I reviewed all the other calls to fork(); they all seem to check
2783 PH/20 When checking for unexpected SMTP input at connect time (before writing
2784 the banner), Exim was not dealing correctly with a non-positive return
2785 from the read() function. If the client had disconnected by this time,
2786 the result was a log entry for a synchronization error with an empty
2787 string after "input=" when read() returned zero. If read() returned -1
2788 (an event I could not check), uninitialized data bytes were printed.
2789 There were reports of junk text (parts of files, etc) appearing after
2792 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2794 PH/22 Added support for macro redefinition, and (re)definition in between
2795 driver and ACL definitions.
2797 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2798 forgetting to use the resulting value; it was using the unexpanded value.
2800 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2801 hadn't been configured. The fix is from Juergen Kreileder, who
2802 understands it better than I do:
2804 "Here's what I see happening with three configured cyrus_sasl
2805 authenticators configured (plain, login, cram-md5):
2807 On startup auth_cyrus_sasl_init() gets called for each of these.
2808 This means three calls to sasl_listmech() without a specified mech_list.
2809 => SASL tests which mechs of all available mechs actually work
2810 => three warnings about OTP not working
2811 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2813 With the patch, sasl_listmech() also gets called three times. But now
2814 SASL's mech_list option is set to the server_mech specified in the the
2815 authenticator. Or in other words, the answer from sasl_listmech()
2816 gets limited to just the mech you're testing for (which is different
2818 => the return list contains just 'plain' or 'login', 'cram-md5' or
2819 nothing depending on the value of ob->server_mech.
2821 I've just tested the patch: Authentication still works fine,
2822 unavailable mechs specified in the exim configuration are still
2823 caught, and the auth.log warnings about OTP are gone."
2825 PH/25 When debugging is enabled, the contents of the command line are added
2826 to the debugging output, even when log_selector=+arguments is not
2829 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2830 answer is "GNU", and only if the return is "GNU/something" is the answer
2833 PH/27 $acl_verify_message is now set immediately after the failure of a
2834 verification in an ACL, and so is available in subsequent modifiers. In
2835 particular, the message can be preserved by coding like this:
2837 warn !verify = sender
2838 set acl_m0 = $acl_verify_message
2840 Previously, $acl_verify_message was set only while expanding "message"
2841 and "log_message" when a very denied access.
2843 PH/28 Modified OS/os.c-Linux with
2845 -#ifndef OS_LOAD_AVERAGE
2846 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2848 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2849 nomenclature these days.)
2851 PH/29 Installed patch from the Sieve maintainer that adds the options
2852 sieve_useraddress and sieve_subaddress to the redirect router.
2854 PH/30 In these circumstances:
2855 . Two addresses routed to the same list of hosts;
2856 . First host does not offer TLS;
2857 . First host accepts first address;
2858 . First host gives temporary error to second address;
2859 . Second host offers TLS and a TLS session is established;
2860 . Second host accepts second address.
2861 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2862 and peerdn, if requested) that were in fact used only for the second
2865 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2866 attention to any local part prefix or suffix that was matched by the
2867 router that accepted the address. It now behaves in the same way as it
2868 does for delivery: the affixes are removed from the local part unless
2869 rcpt_include_affixes is set on the transport.
2871 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2872 timeout during the DATA phase of an incoming message.
2874 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2875 applied a patch sanctioned by the Sieve maintainer.
2877 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2878 the uid or gid is negative. A case of a negative gid caused this to be
2879 noticed. The fix allows for either to be negative.
2881 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2882 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2885 PH/36 The change PH/12 above was broken. Fixed it.
2887 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2888 the grounds that routing the same address twice would always produce the
2889 same answer. This might have been true once, but it is certainly no
2890 longer true now. Routing a child address may depend on the previous
2891 routing that produced that child. Some complicated redirection strategies
2892 went wrong when messages had multiple recipients, and made Exim's
2893 behaviour dependent on the order in which the addresses were given.
2895 I have moved the duplicate checking until after the routing is complete.
2896 Exim scans the addresses that are assigned to local and remote
2897 transports, and removes any duplicates. This means that more work will be
2898 done, as duplicates will always all be routed, but duplicates are
2899 presumably rare, so I don't expect this is of any significance.
2901 For deliveries to pipes, files, and autoreplies, the duplicate checking
2902 still happens during the routing process, since they are not going to be
2905 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2906 It corrects a timeout issue with spamd. This is Ian's comment: "The
2907 background is that sometimes spamd either never reads data from a
2908 connection it has accepted, or it never writes response data. The exiscan
2909 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2910 blindly assumes that writes won't block so it may never time out."
2912 PH/39 Allow G after quota size as well as K and M.
2914 PH/40 The value set for $authenticated_id in an authenticator may not contain
2915 binary zeroes or newlines because the value is written to log lines and
2916 to spool files. There was no check on this. Now the value is run through
2917 the string_printing() function so that such characters are converted to
2918 printable escape sequences.
2920 PH/41 $message_linecount is a new variable that contains the total number of
2921 lines in the message. Compare $body_linecount, which is the count for the
2924 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2925 bounce and delay warning messages, except in certain special cases, which
2928 (a) An SMTP error message from a remote host;
2929 (b) A message specified in a :fail: redirection;
2930 (c) A message specified in a "fail" command in a system filter;
2931 (d) A message specified in a FAIL return from the queryprogram router;
2932 (e) A message specified by the cannot_route_message router option.
2934 In these cases only, Exim does include the error details in bounce and
2935 warning messages. There are also a few cases where bland messages such
2936 as "unrouteable address" or "local delivery error" are given.
2938 PH/43 $value is now also set for the "else" part of a ${run expansion.
2940 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2941 being worked on, but at least Exim now implements the latest version to
2944 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2945 process to complete was treated as a delivery failure, a timeout while
2946 writing the message to the pipe was logged, but erroneously treated as a
2947 successful delivery. Such timeouts include transport filter timeouts. For
2948 consistency with the overall process timeout, these timeouts are now
2949 treated as errors, giving rise to delivery failures by default. However,
2950 there is now a new Boolean option for the pipe transport called
2951 timeout_defer, which, if set TRUE, converts the failures into defers for
2952 both kinds of timeout. A transport filter timeout is now identified in
2955 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2956 systems where "make" and "gmake" are different, calling "gmake" at top
2957 level broke things. I've arranged for the value of $(MAKE) to be passed
2958 from the Makefile to this script so that it can call the same version of
2962 A note about Exim versions 4.44 and 4.50
2963 ----------------------------------------
2965 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2966 changes of various kinds. As a consequence, a big documentation update was
2967 needed. This delayed the release for rather longer than seemed good, especially
2968 in the light of a couple of (minor) security issues. Therefore, the changes
2969 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2970 release. So 4.44 and 4.50 are in effect two different branches that both start
2973 I have left the 4.50 change log unchanged; it contains all the changes since
2974 4.43. The change log for 4.44 is below; many of its items are identical to
2975 those for 4.50. This seems to be the most sensible way to preserve the
2976 historical information.
2982 1. Minor wording change to the doc/README.SIEVE file.
2984 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2985 computation of the current number of files was incorrect.
2987 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2988 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2991 4. Give more explanation in the error message when the command for a transport
2992 filter fails to execute.
2994 5. There are several places where Exim runs a non-Exim command in a
2995 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2996 was being done only for the command run by the queryprogram router. It is
2997 now done for all such subprocesses. The other cases are: ${run, transport
2998 filters, and the commands run by the lmtp and pipe transports.
3000 6. Added CONFIGURE_GROUP build-time option.
3002 7. Some older OS have a limit of 256 on the maximum number of file
3003 descriptors. Exim was using setrlimit() to set 1000 as a large value
3004 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3005 systems. I've change it so that if it can't get 1000, it tries for 256.
3007 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3008 was an oversight, and furthermore, ever since the addition of extra
3009 controls (e.g. 4.43/32), the checks on when to allow different forms of
3010 "control" were broken. There should now be diagnostics for all cases when a
3011 control that does not make sense is encountered.
3013 9. Added the /retain_sender option to "control=submission".
3015 10. $recipients is now available in the predata ACL (oversight).
3017 11. Tidy the search cache before the fork to do a delivery from a message
3018 received from the command line. Otherwise the child will trigger a lookup
3019 failure and thereby defer the delivery if it tries to use (for example) a
3020 cached ldap connection that the parent has called unbind on.
3022 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3023 of $address_data from the recipient verification was clobbered by the
3024 sender verification.
3026 13. The value of address_data from a sender verification is now available in
3027 $sender_address_data in subsequent conditions in the ACL statement.
3029 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3031 15. Added a new option "connect=<time>" to callout options, to set a different
3034 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3035 was its contents. (It was OK if the option was not defined at all.)
3037 17. A "Completed" log line is now written for messages that are removed from
3038 the spool by the -Mrm option.
3040 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3041 information about exactly what failed.
3043 19. Added -dd to debug only the daemon process.
3045 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3046 handles timeouts, both on the server side and network timeouts. Renamed the
3047 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3049 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3050 It is now set to "smtps".
3052 22. $host_address is now set to the target address during the checking of
3053 ignore_target_hosts.
3055 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3056 being passed; this would have caused $sender_host_name to have been used if
3057 matching the list had actually called for a host name (not very likely,
3058 since this list is usually IP addresses). A host name is now passed as
3061 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3062 code that specifies a non-restarting handler (typically sigaction() in
3063 modern systems) in an attempt to fix a rare and obscure crash bug.
3065 25. Narrowed the window for a race in the daemon that could cause it to ignore
3066 SIGCHLD signals. This is not a major problem, because they are used only to
3067 wake it up if nothing else does.
3069 26. A malformed maildirsize file could cause Exim to calculate negative values
3070 for the mailbox size or file count. Odd effects could occur as a result.
3071 The maildirsize information is now recalculated if the size or filecount
3074 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3075 support for a long time. Removed HAVE_SYS_VFS_H.
3077 28. Installed the latest version of exipick from John Jetmore.
3079 29. In an address list, if the pattern was not a regular expression, an empty
3080 subject address (from a bounce message) matched only if the pattern was an
3081 empty string. Non-empty patterns were not even tested. This was the wrong
3082 because it is perfectly reasonable to use an empty address as part of a
3083 database query. An empty address is now tested by patterns that are
3084 lookups. However, all the other forms of pattern expect the subject to
3085 contain a local part and a domain, and therefore, for them, an empty
3086 address still always fails if the pattern is not itself empty.
3088 30. Exim went into a mad DNS loop when attempting to do a callout where the
3089 host was specified on an smtp transport, and looking it up yielded more
3090 than one IP address.
3092 31. Re-factored the code for checking spool and log partition space into a
3093 function that finds that data and another that does the check. The former
3094 is then used to implement four new variables: $spool_space, $log_space,
3095 $spool_inodes, and $log_inodes.
3097 32. The RFC2047 encoding function was originally intended for short strings
3098 such as real names; it was not keeping to the 75-character limit for
3099 encoded words that the RFC imposes. It now respects the limit, and
3100 generates multiple encoded words if necessary. To be on the safe side, I
3101 have increased the buffer size for the ${rfc2047: expansion operator from
3104 33. It is now permitted to omit both strings after an "if" condition; if the
3105 condition is true, the result is "true". As before, when the second string
3106 is omitted, a false condition yields an empty string. This makes it less
3107 cumbersome to write custom ACL and router conditions.
3109 34. Failure to deliver a bounce message always caused it to be frozen, even if
3110 there was an errors_to setting on the router. The errors_to setting is now
3113 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3114 canonical form (fully expanded) before being placed in
3115 $sender_host_address.
3117 36. The table in the code that translates DNS record types into text (T_A to
3118 "A" for instance) was missing entries for NS and CNAME. It is just possible
3119 that this could have caused confusion if both these types were looked up
3120 for the same domain, because the text type is used as part of Exim's
3121 per-process caching. But the chance of anyone hitting this buglet seems
3124 37. The dnsdb lookup has been extended in a number of ways.
3126 (1) There is a new type, "zns", which walks up the domain tree until it
3127 finds some nameserver records. It should be used with care.
3129 (2) There is a new type, "mxh", which is like "mx" except that it returns
3130 just the host names, not the priorities.
3132 (3) It is now possible to give a list of domains (or IP addresses) to be
3133 looked up. The behaviour when one of the lookups defers can be
3134 controlled by a keyword.
3136 (4) It is now possible to specify the separator character for use when
3137 multiple records are returned.
3139 38. The dnslists ACL condition has been extended: it is now possible to supply
3140 a list of IP addresses and/or domains to be looked up in a particular DNS
3143 39. Added log_selector=+queue_time_overall.
3145 40. When running the queue in the test harness, wait just a tad after forking a
3146 delivery process, to get repeatability of debugging output.
3148 41. Include certificate and key file names in error message when GnuTLS fails
3149 to set them up, because the GnuTLS error message doesn't include the name
3150 of the failing file when there is a problem reading it.
3152 42. Allow both -bf and -bF in the same test run.
3154 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3156 44. The "Exiscan patch" is now merged into the mainline Exim source.
3158 45. Sometimes the final signoff response after QUIT could fail to get
3159 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3160 < 0 before doing a fflush(). This bug looks as though it goes back to the
3161 introduction of TLS in release 3.20, but "sometimes" must have been rare
3162 because the tests only now provoked it.
3164 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3165 (this can affect the format of dates).
3167 47. exim_tidydb, when checking for the continued existence of a message for
3168 which it has found a message-specific retry record, was not finding
3169 messages that were in split spool directories. Consequently, it was
3170 deleting retry records that should have stayed in existence.
3172 48. Steve fixed some bugs in eximstats.
3174 49. The SPA authentication driver was not abandoning authentication and moving
3175 on to the next authenticator when an expansion was forced to fail,
3176 contradicting the general specification for all authenticators. Instead it
3177 was generating a temporary error. It now behaves as specified.
3179 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3180 (the order specifies the preference for clients). The order is now AES256,
3181 AES128, 3DES, ARCFOUR128.
3183 51. Small patch to Sieve code - explicitly set From: when generating an
3186 52. Exim crashed if a remote delivery caused a very long error message to be
3187 recorded - for instance if somebody sent an entire SpamAssassin report back
3188 as a large number of 550 error lines. This bug was coincidentally fixed by
3189 increasing the size of one of Exim's internal buffers (big_buffer) that
3190 happened as part of the Exiscan merge. However, to be on the safe side, I
3191 have made the code more robust (and fixed the comments that describe what
3194 53. Now that there can be additional text after "Completed" in log lines (if
3195 the queue_time_overall log selector is set), a one-byte patch to exigrep
3196 was needed to allow it to recognize "Completed" as not the last thing in
3199 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3200 patch that reportedly fixes this has been added. I am not expert enough to
3201 create a test for it. This is what the patch creator wrote:
3203 "I found a little strange behaviour of ldap code when working with
3204 Windows 2003 AD Domain, where users was placed in more than one
3205 Organization Units. When I tried to give exim partial DN, the exit code
3206 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3207 But simultaneously result of request was absolutely normal ldap result,
3208 so I produce this patch..."
3210 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3211 REFERENCE, so I have modified the code to exclude the patch when that macro
3214 55. Some experimental protocols are using DNS PTR records for new purposes. The
3215 keys for these records are domain names, not reversed IP addresses. The
3216 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3217 leaves it alone. Component reversal etc. now happens only for IP addresses.
3220 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3222 57. Double the size of the debug message buffer (to 2048) so that more of very
3223 long debug lines gets shown.
3225 58. The exicyclog utility now does better if the number of log files to keep
3226 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3228 59. Two changes related to the smtp_active_hostname option:
3230 (1) $smtp_active_hostname is now available as a variable.
3231 (2) The default for smtp_banner uses $smtp_active_hostname instead
3232 of $primary_hostname.
3234 60. The host_aton() function is supposed to be passed a string that is known
3235 to be a valid IP address. However, in the case of IPv6 addresses, it was
3236 not checking this. This is a hostage to fortune. Exim now panics and dies
3237 if the condition is not met. A case was found where this could be provoked
3238 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3239 components; fortuitously, this particular loophole had already been fixed
3240 by change 4.50/55 above.
3242 If there are any other similar loopholes, the new check in host_aton()
3243 itself should stop them being exploited. The report I received stated that
3244 data on the command line could provoke the exploit when Exim was running as
3245 exim, but did not say which command line option was involved. All I could
3246 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3247 running as the user.
3250 61. There was a buffer overflow vulnerability in the SPA authentication code
3251 (which came originally from the Samba project). I have added a test to the
3252 spa_base64_to_bits() function which I hope fixes it.
3255 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3256 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3258 63. The daemon start-up calls getloadavg() while still root for those OS that
3259 need the first call to be done as root, but it missed one case: when
3260 deliver_queue_load_max is set with deliver_drop_privilege. This is
3261 necessary for the benefit of the queue runner, because there is no re-exec
3262 when deliver_drop_privilege is set.
3264 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3265 This has been fixed.
3267 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3268 was in use, was not putting the data itself into the right store pool;
3269 consequently, it could be overwritten for a subsequent message in the same
3270 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3273 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3275 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3276 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3277 the function were treating the return as a boolean value, which happened to
3278 work because 0=false and not-0=true, but is not correct code.
3280 68. The host_aton() function was not handling scoped IPv6 addresses (those
3281 with, for example, "%eth0" on the end) correctly.
3283 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3284 negated items (that is, ~something) in unsigned ints. Some compilers
3285 apparently mutter when there is no cast.
3287 70. If an address verification called from an ACL failed, and did not produce a
3288 user-specific message (i.e. there was only a "system" message), nothing was
3289 put in $acl_verify_message. In this situation, it now puts the system
3292 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3293 session; change 4.31/43 added the unwanted input to the log line - except
3294 that it did not do this in the start of session case. It now does.
3296 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3297 This is wrong and can cause the other end to generate a synchronization
3298 error if it is another Exim or anything else that does the synchronization
3299 check. A QUIT command is no longer sent after a timeout.
3301 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3302 during host lookups.
3304 74. The defer_ok option of callout verification was not working if it was used
3305 when verifying addresses in header lines, that is, for this case:
3307 verify = header_sender/callout=defer_ok
3309 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3310 those file descriptors could be used for SMTP connections. If anything
3311 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3312 could be sent to the SMTP client, causing chaos. The daemon now opens
3313 stdin, stdout, and stderr to /dev/null when it puts itself into the
3316 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3317 log by default. The user can override this with suitable Perl magic.
3319 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3320 the log message when discard triggers, was not working for the DATA ACL or
3321 for the non-SMTP ACL.
3323 78. Error message wording change in sieve.c.
3325 79. If smtp_accept_max_per_host was set, the number of connections could be
3326 restricted to fewer than expected, because the daemon was trying to set up
3327 a new connection before checking whether the processes handling previous
3328 connections had finished. The check for completed processes is now done
3329 earlier. On busy systems, this bug wouldn't be noticed because something
3330 else would have woken the daemon, and it would have reaped the completed
3333 80. If a message was submitted locally by a user whose login name contained one
3334 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3335 It caused a spool format error. I have fixed the spool reading code. A
3336 related problem was that the "from" clause in the Received: line became
3337 illegal because of the space(s). It is now covered by ${quote_local_part.
3339 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3342 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3344 83. Patch from Sieve maintainer to fix unterminated string problem in
3345 "vacation" handling.
3347 84. Some minor changes to the Linux configuration files to help with other
3348 OS variants using glibc.
3350 85. One more patch for Sieve to update vacation handling to latest spec.
3353 ----------------------------------------------------
3354 See the note above about the 4.44 and 4.50 releases.
3355 ----------------------------------------------------
3361 1. Change 4.43/35 introduced a bug that caused file counts to be
3362 incorrectly computed when quota_filecount was set in an appendfile
3365 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3366 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3369 3. Give more explanation in the error message when the command for a transport
3370 filter fails to execute.
3372 4. There are several places where Exim runs a non-Exim command in a
3373 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3374 was being done only for the command run by the queryprogram router. It is
3375 now done for all such subprocesses. The other cases are: ${run, transport
3376 filters, and the commands run by the lmtp and pipe transports.
3378 5. Some older OS have a limit of 256 on the maximum number of file
3379 descriptors. Exim was using setrlimit() to set 1000 as a large value
3380 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3381 systems. I've change it so that if it can't get 1000, it tries for 256.
3383 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3384 was an oversight, and furthermore, ever since the addition of extra
3385 controls (e.g. 4.43/32), the checks on when to allow different forms of
3386 "control" were broken. There should now be diagnostics for all cases when a
3387 control that does not make sense is encountered.
3389 7. $recipients is now available in the predata ACL (oversight).
3391 8. Tidy the search cache before the fork to do a delivery from a message
3392 received from the command line. Otherwise the child will trigger a lookup
3393 failure and thereby defer the delivery if it tries to use (for example) a
3394 cached ldap connection that the parent has called unbind on.
3396 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3397 of $address_data from the recipient verification was clobbered by the
3398 sender verification.
3400 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3401 was its contents. (It was OK if the option was not defined at all.)
3403 11. A "Completed" log line is now written for messages that are removed from
3404 the spool by the -Mrm option.
3406 12. $host_address is now set to the target address during the checking of
3407 ignore_target_hosts.
3409 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3410 being passed; this would have caused $sender_host_name to have been used if
3411 matching the list had actually called for a host name (not very likely,
3412 since this list is usually IP addresses). A host name is now passed as
3415 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3416 code that specifies a non-restarting handler (typically sigaction() in
3417 modern systems) in an attempt to fix a rare and obscure crash bug.
3419 15. Narrowed the window for a race in the daemon that could cause it to ignore
3420 SIGCHLD signals. This is not a major problem, because they are used only to
3421 wake it up if nothing else does.
3423 16. A malformed maildirsize file could cause Exim to calculate negative values
3424 for the mailbox size or file count. Odd effects could occur as a result.
3425 The maildirsize information is now recalculated if the size or filecount
3428 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3429 support for a long time. Removed HAVE_SYS_VFS_H.
3431 18. Updated exipick to current release from John Jetmore.
3433 19. Allow an empty sender to be matched against a lookup in an address list.
3434 Previously the only cases considered were a regular expression, or an
3437 20. Exim went into a mad DNS lookup loop when doing a callout where the
3438 host was specified on the transport, if the DNS lookup yielded more than
3441 21. The RFC2047 encoding function was originally intended for short strings
3442 such as real names; it was not keeping to the 75-character limit for
3443 encoded words that the RFC imposes. It now respects the limit, and
3444 generates multiple encoded words if necessary. To be on the safe side, I
3445 have increased the buffer size for the ${rfc2047: expansion operator from
3448 22. Failure to deliver a bounce message always caused it to be frozen, even if
3449 there was an errors_to setting on the router. The errors_to setting is now
3452 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3453 canonical form (fully expanded) before being placed in
3454 $sender_host_address.
3456 24. Updated eximstats to version 1.33
3458 25. Include certificate and key file names in error message when GnuTLS fails
3459 to set them up, because the GnuTLS error message doesn't include the name
3460 of the failing file when there is a problem reading it.
3462 26. Expand error message when OpenSSL has problems setting up cert/key files.
3465 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3466 (this can affect the format of dates).
3468 28. exim_tidydb, when checking for the continued existence of a message for
3469 which it has found a message-specific retry record, was not finding
3470 messages that were in split spool directories. Consequently, it was
3471 deleting retry records that should have stayed in existence.
3473 29. eximstats updated to version 1.35
3474 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3475 1.35 - bugfix such that pie charts by volume are generated correctly
3477 30. The SPA authentication driver was not abandoning authentication and moving
3478 on to the next authenticator when an expansion was forced to fail,
3479 contradicting the general specification for all authenticators. Instead it
3480 was generating a temporary error. It now behaves as specified.
3482 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3483 (the order specifies the preference for clients). The order is now AES256,
3484 AES128, 3DES, ARCFOUR128.
3486 31. Small patch to Sieve code - explicitly set From: when generating an
3489 32. Exim crashed if a remote delivery caused a very long error message to be
3490 recorded - for instance if somebody sent an entire SpamAssassin report back
3491 as a large number of 550 error lines. This bug was coincidentally fixed by
3492 increasing the size of one of Exim's internal buffers (big_buffer) that
3493 happened as part of the Exiscan merge. However, to be on the safe side, I
3494 have made the code more robust (and fixed the comments that describe what
3497 33. Some experimental protocols are using DNS PTR records for new purposes. The
3498 keys for these records are domain names, not reversed IP addresses. The
3499 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3500 leaves it alone. Component reversal etc. now happens only for IP addresses.
3503 34. The host_aton() function is supposed to be passed a string that is known
3504 to be a valid IP address. However, in the case of IPv6 addresses, it was
3505 not checking this. This is a hostage to fortune. Exim now panics and dies
3506 if the condition is not met. A case was found where this could be provoked
3507 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3508 components; fortuitously, this particular loophole had already been fixed
3509 by change 4.50/55 or 4.44/33 above.
3511 If there are any other similar loopholes, the new check in host_aton()
3512 itself should stop them being exploited. The report I received stated that
3513 data on the command line could provoke the exploit when Exim was running as
3514 exim, but did not say which command line option was involved. All I could
3515 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3516 running as the user.
3519 35. There was a buffer overflow vulnerability in the SPA authentication code
3520 (which came originally from the Samba project). I have added a test to the
3521 spa_base64_to_bits() function which I hope fixes it.
3524 36. The daemon start-up calls getloadavg() while still root for those OS that
3525 need the first call to be done as root, but it missed one case: when
3526 deliver_queue_load_max is set with deliver_drop_privilege. This is
3527 necessary for the benefit of the queue runner, because there is no re-exec
3528 when deliver_drop_privilege is set.
3530 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3531 was in use, was not putting the data itself into the right store pool;
3532 consequently, it could be overwritten for a subsequent message in the same
3533 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3536 38. Sometimes the final signoff response after QUIT could fail to get
3537 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3538 < 0 before doing a fflush(). This bug looks as though it goes back to the
3539 introduction of TLS in release 3.20, but "sometimes" must have been rare
3540 because the tests only now provoked it.
3546 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3547 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3548 Now it returns an integer. A number of calls were still expecting a T/F
3549 return. Fortuitously, in all cases, the tests worked in OK situations,
3550 which is the norm. However, things would have gone wrong on any write
3551 failures on the smtp file descriptor. This function is used when sending
3552 messages over SMTP and also when doing verify callouts.
3554 2. When Exim is called to do synchronous delivery of a locally submitted
3555 message (the -odf or -odi options), it no longer closes stderr before doing
3558 3. Implemented the mua_wrapper option.
3560 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3562 5. Implemented the functions header_remove(), header_testname(),
3563 header_add_at_position(), and receive_remove_recipient(), and exported them
3566 6. If an ACL "warn" statement specified the addition of headers, Exim already
3567 inserted X-ACL-Warn: at the start if there was no header name. However, it
3568 was not making this test for the second and subsequent header lines if
3569 there were newlines in the string. This meant that an invalid header could
3570 be inserted if Exim was badly configured.
3572 7. Allow an ACL "warn" statement to add header lines at the start or after all
3573 the Received: headers, as well as at the end.
3575 8. Added the rcpt_4xx retry error code.
3577 9. Added postmaster_mailfrom=xxx to callout verification option.
3579 10. Added mailfrom=xxxx to the callout verification option, for verify=
3582 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3583 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3585 12. Inserted some casts to stop certain compilers warning when using pointer
3586 differences as field lengths or precisions in printf-type calls (mostly
3587 affecting debugging statements).
3589 13. Added optional readline() support for -be (dynamically loaded).
3591 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3592 same clock tick as a message's arrival, so that its received time was the
3593 same as the "first fail" time on the retry record, and that message
3594 remained on the queue past the ultimate address timeout, every queue runner
3595 would try a delivery (because it was past the ultimate address timeout) but
3596 after another failure, the ultimate address timeout, which should have then
3597 bounced the address, did not kick in. This was a "< instead of <=" error;
3598 in most cases the first failure would have been in the next clock tick
3599 after the received time, and all would be well.
3601 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3602 being recognized when the domain list was tested by the match_domain
3603 condition in an expansion string.
3605 16. Added the ${str2b64: operator.
3607 17. Exim was always calling setrlimit() to set a large limit for the number of
3608 processes, without checking whether the existing limit was already
3609 adequate. (It did check for the limit on file descriptors.) Furthermore,
3610 errors from getrlimit() and setrlimit() were being ignored. Now they are
3611 logged to the main and panic logs, but Exim does carry on, to try to do its
3612 job under whatever limits there are.
3614 18. Imported PCRE 5.0.
3616 19. Trivial typo in log message " temporarily refused connection" (the leading
3619 20. If the log selector return_path_on_delivery was set and an address was
3620 redirected to /dev/null, the delivery process crashed because it assumed
3621 that a return path would always be set for a "successful" delivery. In this
3622 case, the whole delivery is bypassed as an optimization, and therefore no
3625 21. Internal re-arrangement: the function for sending a challenge and reading
3626 a response while authentication was assuming a zero-terminated challenge
3627 string. It's now changed to take a pointer and a length, to allow for
3628 binary data in such strings.
3630 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3632 23. Exim was not respecting finduser_retries when seeking the login of the
3633 uid under which it was called; it was always trying 10 times. (The default
3634 setting of finduser_retries is zero.) Also, it was sleeping after the final
3635 failure, which is pointless.
3637 24. Implemented tls_on_connect_ports.
3639 25. Implemented acl_smtp_predata.
3641 26. If the domain in control=submission is set empty, Exim assumes that the
3642 authenticated id is a complete email address when it generates From: or
3643 Sender: header lines.
3645 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3646 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3647 chown and chgrp in /bin and hostname in /usr/bin.
3649 28. Exim was keeping the "process log" file open after each use, just as it
3650 does for the main log. This opens the possibility of it remaining open for
3651 long periods when the USR1 signal hits a daemon. Occasional processlog
3652 errors were reported, that could have been caused by this. Anyway, it seems
3653 much more sensible not to leave this file open at all, so that is what now
3656 29. The long-running daemon process does not normally write to the log once it
3657 has entered its main loop, and it closes the log before doing so. This is
3658 so that log files can straightforwardly be renamed and moved. However,
3659 there are a couple of unusual error situations where the daemon does write
3660 log entries, and I had neglected to close the log afterwards.
3662 30. The text of an SMTP error response that was received during a remote
3663 delivery was being truncated at 512 bytes. This is too short for some of
3664 the long messages that one sometimes sees. I've increased the limit to
3667 31. It is now possible to make retry rules that apply only when a message has a
3668 specific sender, in particular, an empty sender.
3670 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3671 it possible to be selective about when SMTP synchronization is enforced.
3673 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3675 32. Implemented hosts_connection_nolog.
3677 33. Added an ACL for QUIT.
3679 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3682 35. Added mailbox_size and mailbox_filecount to appendfile.
3684 36. Added control = no_multiline_responses to ACLs.
3686 37. There was a bug in the logic of the code that waits for the clock to tick
3687 in the case where the clock went backwards by a substantial amount such
3688 that the microsecond fraction of "now" was more than the microsecond
3689 fraction of "then" (but the whole seconds number was less).
3691 38. Added support for the libradius Radius client library this is found on
3692 FreeBSD (previously only the radiusclient library was supported).
3698 1. When certain lookups returned multiple values in the form name=value, the
3699 quoting of the values was not always being done properly. Specifically:
3700 (a) If the value started with a double quote, but contained no whitespace,
3702 (b) If the value contained whitespace other than a space character (i.e.
3703 tabs or newlines or carriage returns) it was not quoted.
3704 This fix has been applied to the mysql and pgsql lookups by writing a
3705 separate quoting function and calling it from the lookup code. The fix
3706 should probably also be applied to nisplus, ibase and oracle lookups, but
3707 since I cannot test any of those, I have not disturbed their existing code.
3709 2. A hit in the callout cache for a specific address caused a log line with no
3710 reason for rejecting RCPT. Now it says "Previous (cached) callout
3711 verification failure".
3713 3. There was an off-by-one bug in the queryprogram router. An over-long
3714 return line was truncated at 256 instead of 255 characters, thereby
3715 overflowing its buffer with the terminating zero. As well as fixing this, I
3716 have increased the buffer size to 1024 (and made a note to document this).
3718 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3719 when Exim is waiting for an SMTP response from a remote server, Exim
3720 restarts its select() call on the socket, thereby resetting its timeout.
3721 This is not a problem when such interrupts are rare. Somebody set up a cron
3722 job to run exiwhat every 2 minutes, which is less than the normal select()
3723 timeout (5 or 10 minutes). This meant that the select() timeout never
3724 kicked in because it was always reset. I have fixed this by comparing the
3725 time when an interrupt arrives with the time at the start of the first call
3726 to select(). If more time than the timeout has elapsed, the interrupt is
3727 treated as a timeout.
3729 5. Some internal re-factoring in preparation for the addition of Sieve
3730 extensions (by MH). In particular, the "personal" test is moved to a
3731 separate function, and given an option for scanning Cc: and Bcc: (which is
3732 not set for Exim filters).
3734 6. When Exim created an email address using the login of the caller as the
3735 local part (e.g. when creating a From: or Sender: header line), it was not
3736 quoting the local part when it contained special characters such as @.
3738 7. Installed new OpenBSD configuration files.
3740 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3741 try to make them clearer.
3743 9. Callout options, other than the timeout value, were being ignored when
3744 verifying sender addresses in header lines. For example, when using
3746 verify = header_sender/callout=no_cache
3748 the cache was (incorrectly) being used.
3750 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3751 only the Cygwin environment.
3753 11. When return_path_on_delivery was set as a log selector, if different remote
3754 addresses in the same message used different return paths and parallel
3755 remote delivery occurred, the wrong values would sometimes be logged.
3756 (Whenever a remote delivery process finished, the return path value from
3757 the most recently started remote delivery process was logged.)
3759 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3760 lines when AUTH and/or TLS are in use. This is the "received protocol"
3761 field. Exim used to use "asmtp" for authenticated SMTP, without any
3762 indication (in the protocol name) for TLS use. Now it follows the RFC and
3763 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3764 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3765 names appear in log lines as well as in Received: header lines.
3767 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3768 extensions, and comparison tests, and to fix some bugs.
3770 14. Changes to the "personal" filter test:
3772 (1) The test was buggy in that it was just doing the equivalent of
3773 "contains" tests on header lines. For example, if a user's address was
3774 anne@some.where, the "personal" test would incorrectly be true for
3776 To: susanne@some.where
3778 This test is now done by extracting each address from the header in turn,
3779 and checking the entire address. Other tests that are part of "personal"
3780 are now done using regular expressions (for example, to check local parts
3781 of addresses in From: header lines).
3783 (2) The list of non-personal local parts in From: addresses has been
3784 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3785 taken from the Sieve specification recommendations.
3787 (3) If the message contains any header line starting with "List-" it is
3788 treated as non-personal.
3790 (4) The test for "circular" in the Subject: header line has been removed
3791 because it now seems ill-conceived.
3793 15. Minor typos in src/EDITME comments corrected.
3795 16. Installed latest exipick from John Jetmore.
3797 17. If headers_add on a router specified a text string that was too long for
3798 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3799 of string_sprintf() is now avoided.
3801 18. $message_body_size was not set (it was always zero) when running the DATA
3802 ACL and the local_scan() function.
3804 19. For the "mail" command in an Exim filter, no default was being set for
3805 the once_repeat time, causing a random time value to be used if "once" was
3806 specified. (If the value happened to be <= 0, no repeat happened.) The
3807 default is now 0s, meaning "never repeat". The "vacation" command was OK
3808 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3809 (I found it when inspecting the code).
3811 20. There is now an overall timeout for performing a callout verification. It
3812 defaults to 4 times the callout timeout, which applies to individual SMTP
3813 commands during the callout. The overall timeout applies when there is more
3814 than one host that can be tried. The timeout is checked before trying the
3815 next host. This prevents very long delays if there are a large number of
3816 hosts and all are timing out (e.g. when the network connections are timing
3817 out). The value of the overall timeout can be changed by specifying an
3818 additional sub-option for "callout", called "maxwait". For example:
3820 verify = sender/callout=5s,maxwait=20s
3822 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3823 to the end before writing, but this should make it even safer).
3825 22. Exim was forgetting that it had advertised PIPELINING for the second and
3826 subsequent messages on an SMTP connection. It was also not resetting its
3827 memory on STARTTLS and an internal HELO.
3829 23. When Exim logs an SMTP synchronization error within a session, it now
3830 records whether PIPELINING has been advertised or not.
3832 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3833 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3834 rather than long int.
3836 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3838 26. Added the never_mail option to autoreply.
3844 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3845 crash if the getsockname() call failed; this can happen if a connection is
3846 closed very soon after it is established. The problem was simply in the
3847 order in which certain operations were done, causing Exim to try to write
3848 to the SMTP stream before it had set up the file descriptor. The bug has
3849 been fixed by making things happen in the correct order.
3855 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3856 before the connection was closed, thus losing the rejection response.
3858 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3859 some early Solaris releases, but causes trouble in current releases where
3860 socklen_t is defined.
3862 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3865 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3868 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3869 that releasing the top of it at the end releases what was used for sub-
3870 expansions (unless the block got too big). However, discard this block if
3871 the first thing is a variable or header, so that we can use its block when
3872 it is dynamic (useful for very large $message_headers, for example).
3874 6. Lookups now cache *every* query, not just the most recent. A new, separate
3875 store pool is used for this. It can be recovered when all lookup caches are
3876 flushed. Lookups now release memory at the end of their result strings.
3877 This has involved some general refactoring of the lookup sources.
3879 7. Some code has been added to the store_xxx() functions to reduce the amount
3880 of flapping under certain conditions.
3882 8. log_incoming_interface used to affect only the <= reception log lines. Now
3883 it causes the local interface and port to be added to several more SMTP log
3884 lines, for example "SMTP connection from", and rejection lines.
3886 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3888 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3890 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3891 could be overwritten at the end of the current message (or the start of a
3892 new message if it was set in a HELO ACL). The value is now preserved for
3893 the duration of the SMTP connection.
3895 12. If a transport had a headers_rewrite setting, and a matching header line
3896 contained an unqualified address, that address was qualified, even if it
3897 did not match any rewriting rules. The underlying bug was that the values
3898 of the flags that permit the existence of unqualified sender and recipient
3899 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3900 non-local messages, and by -bnq for local messages) were not being
3901 preserved with the message after it was received.
3903 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3904 "next input=" as part of the text comprising the host identity instead of
3905 the correct text. The code was using the same buffer for two different
3906 strings. However, depending on which order the printing function evaluated
3907 its arguments, the bug did not always show up. Under Linux, for example, my
3908 test suite worked just fine.
3910 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3911 doesn't work with some older versions of Perl. It has been changed to "my",
3912 which in any case is probably the better facility to use.
3914 15. A really picky compiler found some instances of statements for creating
3915 error messages that either had too many or two few arguments for the format
3918 16. The size of the buffer for calls to the DNS resolver has been increased
3919 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3920 for addresses that have a lot of PTR records. This alleviates a problem; it
3921 does not fully solve it.
3923 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3924 buffer now truncates the list and logs the incident, which is the same
3925 action as happens when Exim is looking up a host name and its aliases.
3926 Previously in this situation something unpredictable would happen;
3927 sometimes it was "internal error: store_reset failed".
3929 18. If a server dropped the connection unexpectedly when an Exim client was
3930 using GnuTLS and trying to read a response, the client delivery process
3931 crashed while trying to generate an error log message.
3933 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3934 string, for example:
3936 warn message = H1: something\nH2: something
3938 the text was added as a single header line from Exim's point of view
3939 though it ended up OK in the delivered message. However, searching for the
3940 second and subsequent header lines using $h_h2: did not work. This has been
3941 fixed. Similarly, if a system filter added multiple headers in this way,
3942 the routers could not see them.
3944 20. Expanded the error message when iplsearch is called with an invalid key to
3945 suggest using net-iplsearch in a host list.
3947 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3948 ACLs are no longer actually imposed (and a message to that effect is
3951 22. If a "gecos" field in a passwd entry contained escaped characters, in
3952 particular, if it contained a \" sequence, Exim got it wrong when building
3953 a From: or a Sender: header from that name. A second bug also caused
3954 incorrect handling when an unquoted " was present following a character
3955 that needed quoting.
3957 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3958 was not being matched caselessly.
3960 24. Arranged for all hyphens in the exim.8 source to be escaped with
3963 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3964 properly. Recipient callout cache records were still being keyed to include
3965 the sender, even when use_sender was set false. This led to far more
3966 callouts that were necessary. The sender is no longer included in the key
3967 when use_sender is false.
3969 26. Added "control = submission" modifier to ACLs.
3971 27. Added the ${base62d: operator to decode base 62 numbers.
3973 28. dnsdb lookups can now access SRV records.
3975 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3976 the configuration file.
3978 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3979 (-v) mode. This makes the output for a verbose queue run more intelligible.
3981 31. Added a use_postmaster feature to recipient callouts.
3983 32. Added the $body_zerocount variable, containing the number of binary zero
3984 bytes in the message body.
3986 33. The time of last modification of the "new" subdirectory is now used as the
3987 "mailbox time last read" when there is a quota error for a maildir
3990 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3992 35. Added +ignore_unknown as a special item in host lists.
3994 36. Code for decoding IPv6 addresses in host lists is now included, even if
3995 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3996 address was recognized as an IP address, but was then not correctly decoded
3997 into binary, causing unexpected and incorrect effects when compared with
4004 1. Very minor rewording of debugging text in manualroute to say "list of
4005 hosts" instead of "hostlist".
4007 2. If verify=header_syntax was set, and a header line with an unqualified
4008 address (no domain) and a large number of spaces between the end of the
4009 name and the colon was received, the reception process suffered a buffer
4010 overflow, and (when I tested it) crashed. This was caused by some obsolete
4011 code that should have been removed. The fix is to remove it!
4013 3. When running in the test harness, delay a bit after writing a bounce
4014 message to get a bit more predictability in the log output.
4016 4. Added a call to search_tidyup() just before forking a reception process. In
4017 theory, someone could use a lookup in the expansion of smtp_accept_max_
4018 per_host which, without the tidyup, could leave open a database connection.
4020 5. Added the variables $recipient_data and $sender_data which get set from a
4021 lookup success in an ACL "recipients" or "senders" condition, or a router
4022 "senders" option, similar to $domain_data and $local_part_data.
4024 6. Moved the writing of debug_print from before to after the "senders" test
4027 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4028 problems for message scanning, either using a data ACL, or using
4029 local_scan() because the Received: header was not generated till after they
4030 were called (in order to set the time as the time of reception completion).
4031 I have revised the way this works. The header is now generated after the
4032 body is received, but before the ACL or local_scan() are called. After they
4033 are run, the timestamp in the header is updated.
4039 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4040 before starting a queue runner without re-exec. This happened only when
4041 deliver_drop_privilege was set or when the Exim user was set to root. The
4042 effect of the bug was that timeouts during subsequent deliveries caused
4043 crashes instead of being properly handled. The handler is now left at its
4044 default (and expected) setting.
4046 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4047 message, again when deliver_drop_privilege is set or Exim is run as root.
4048 The bug described in (1) was not present in this case, but the tidying up
4049 of the other signals was missing. I have made the two cases consistent.
4051 3. The ignore_target_hosts setting on a manualroute router was being ignored
4052 for hosts that were looked up using the /MX notation.
4054 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4057 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4058 operated on the sender address. After changing the $sender_address to <>
4059 for the sender address verify, Exim was re-instated it as the original
4060 (before rewriting) address, but remembering that it had rewritten it, so it
4061 wasn't rewriting it again. This bug also had the effect of breaking the
4062 sender address verification caching when the sender address was rewritten.
4064 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4065 This has been changed so that if the ip literal address matches
4066 ignore_target_hosts, the router declines.
4068 7. Added expansion conditions match_domain, match_address, and match_local_
4069 part (NOT match_host).
4071 8. The placeholder for the Received: header didn't have a length field set.
4073 9. Added code to Exim itself and to exim_lock to test for a specific race
4074 condition that could lead to file corruption when using MBX delivery. The
4075 issue is with the lockfile that is created in /tmp. If this file is removed
4076 after a process has opened it but before that process has acquired a lock,
4077 there is the potential for a second process to recreate the file and also
4078 acquire a lock. This could lead to two Exim processes writing to the file
4079 at the same time. The added code performs the same test as UW imapd; it
4080 checks after acquiring the lock that its file descriptor still refers to
4081 the same named file.
4083 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4084 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4087 11. Added the smtp_active_hostname option. If used, this will typically be made
4088 to depend on the incoming interface address. Because $interface_address is
4089 not set up until the daemon has forked a reception process, error responses
4090 that can happen earlier (such as "too many connections") no longer contain
4093 12. If an expansion in a condition on a "warn" statement fails because a lookup
4094 defers, the "warn" statement is abandoned, and the next ACL statement is
4095 processed. Previously this caused the whole ACL to be aborted.
4097 13. Added the iplsearch lookup type.
4099 14. Added ident_timeout as a log selector.
4101 15. Added tls_certificate_verified as a log selector.
4103 16. Added a global option tls_require_ciphers (compare the smtp transport
4104 option of the same name). This controls incoming TLS connections.
4106 17. I finally figured out how to make tls_require_ciphers do a similar thing
4107 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4108 before starting the TLS session.
4110 18. Tabs are now shown as \t in -bP output.
4112 19. If the log selector return_path_on_delivery was set, Exim crashed when
4113 bouncing a message because it had too many Received: header lines.
4115 20. If two routers both had headers_remove settings, and the first one included
4116 a superfluous trailing colon, the final name in the first list and the
4117 first name in the second list were incorrectly joined into one item (with a
4118 colon in the middle).
4124 1. Added -C and -D options to the exinext utility, mainly to make it easier
4125 to include in the automated testing, but these could be helpful when
4126 multiple configurations are in use.
4128 2. The exinext utility was not formatting the output nicely when there was
4129 an alternate port involved in the retry record key, nor when there was a
4130 message id as well (for retries that were specific to a specific message
4131 and a specific host). It was also confused by IPv6 addresses, because of
4132 the additional colons they contain. I have fixed the IPv4 problem, and
4133 patched it up to do a reasonable job for IPv6.
4135 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4136 delivery, the log line now contains "pipelined" if PIPELINING was used.
4138 4. An SMTP transport process used to panic and die if the bind() call to set
4139 an explicit outgoing interface failed. This has been changed; it is now
4140 treated in the same way as a connect() failure.
4142 5. A reference to $sender_host_name in the part of a conditional expansion
4143 that was being skipped was still causing a DNS lookup. This no longer
4146 6. The def: expansion condition was not recognizing references to header lines
4147 that used bh_ and bheader_.
4149 7. Added the _cache feature to named lists.
4151 8. The code for checking quota_filecount in the appendfile transport was
4152 allowing one more file than it should have been.
4154 9. For compatibility with Sendmail, the command line option
4162 and sets the incoming protocol and host name (for trusted callers). The
4163 host name and its colon can be omitted when only the protocol is to be set.
4164 Note the Exim already has two private options, -pd and -ps, that refer to
4165 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4166 "s", but I don't think that's a major issue.
4168 10. A number of refactoring changes to the code, none of which should affect
4171 (a) The number of logging options was getting close to filling up the
4172 32-bit word that was used as a bit map. I have split them into two classes:
4173 those that are passed in the argument to log_write(), and those that are
4174 only ever tested independently outside of that function. These are now in
4175 separate 32-bit words, so there is plenty of room for expansion again.
4176 There is no change in the user interface or the logging behaviour.
4178 (b) When building, for example, log lines, the code previously used a
4179 macro that called string_cat() twice, in order to add two strings. This is
4180 not really sufficiently general. Furthermore, there was one instance where
4181 it was actually wrong because one of the argument was used twice, and in
4182 one call a function was used. (As it happened, calling the function twice
4183 did not affect the overall behaviour.) The macro has been replaced by a
4184 function that can join an arbitrary number of extra strings onto a growing
4187 (c) The code for expansion conditions now uses a table and a binary chop
4188 instead of a serial search (which was left over from when there were very
4189 few conditions). Also, it now recognizes conditions like "pam" even when
4190 the relevant support is not compiled in: a suitably worded error message is
4191 given if an attempt is made to use such a condition.
4193 11. Added ${time_interval:xxxxx}.
4195 12. A bug was causing one of the ddress fields not to be passed back correctly
4196 from remote delivery subprocesses. The field in question was not being
4197 subsequently used, so this caused to problems in practice.
4199 13. Added new log selectors queue_time and deliver_time.
4201 14. Might have fixed a bug in maildirsizefile handling that threw up
4202 "unexpected character" debug warnings, and recalculated the data
4203 unnecessarily. In any case, I expanded the warning message to give more
4206 15. Added the message "Restricted characters in address" to the statements in
4207 the default ACL that block characters like @ and % in local parts.
4209 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4210 Three changes have been made:
4212 (a) There was a serious bug; a negative response to MAIL caused the whole
4213 recipient domain to be cached as invalid, thereby blocking all messages
4214 to all local parts at the same domain, from all senders. This bug has
4215 been fixed. The domain is no longer cached after a negative response to
4216 MAIL if the sender used is not empty.
4218 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4221 (c) A new callout option, "use_sender" has been added for people who want
4222 the modified behaviour.
4228 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4231 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4232 indeed breaks things for older releases.
4234 3. Added additional logging to the case where there is a problem reading data
4235 from a filter that is running in a subprocess using a pipe, in order to
4236 try to track down a specific problem.
4238 4. Testing facility fudge: when running in the test harness and attempting
4239 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4240 getting "No route to host". Convert this to a timeout.
4242 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4245 6. Some OS don't have socklen_t but use size_t instead. This affects the
4246 fifth argument of getsockopt() amongst other things. This is now
4247 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4248 can be set for individual OS. I have set it for SunOS5, OSF1, and
4249 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4250 some earlier ones do not.
4252 7. Change 4.30/15 was not doing the test caselessly.
4254 8. The standard form for an IPv6 address literal was being rejected by address
4255 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4256 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4257 this, as well as the form without the "IPv6" on the front (but only when
4258 address literals are enabled, of course).
4260 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4262 10. Exim crashed if a message with an empty sender address specified by -f
4263 encountered a router with an errors_to setting. This could be provoked only
4264 by a command such as
4268 where an empty string was supplied; "<>" did not hit this bug.
4270 11. Installed PCRE release 4.5.
4272 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4273 remained set. It is now erased.
4275 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4276 times from message ids (which are base 36 rather than the normal 62).
4278 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4279 were being counted as actual protocol errors, and logged if the log
4280 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4281 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4282 and DATA following a set of rejected RCPTs do not count as protocol errors.
4283 In other words, Exim assumes they were pipelined, though this may not
4284 actually be the case. Of course, in all cases the client gets an
4285 appropriate error code.
4287 15. If a lookup fails in an ACL condition, a message about the failure may
4288 be available; it is used if testing the ACL cannot continue, because most
4289 such messages specify what the cause of the deferral is. However, some
4290 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4291 that caused an old message to be retained and used if a later statement
4292 caused a defer, replacing the real cause of the deferral.
4294 16. If an IP address had so many PTR records that the DNS lookup buffer
4295 was not large enough to hold them, Exim could crash while trying to process
4296 the truncated data. It now detects and logs this case.
4298 17. Further to 4.21/58, another change has been made: if (and only if) the
4299 first line of a message (the first header line) ends with CRLF, a bare LF
4300 in a subsequent header line has a space inserted after it, so as not to
4301 terminate the header.
4303 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4304 unnecessarily, used atoi() instead of strtol(), and didn't check the
4305 termination when getting file sizes from file names by regex.
4307 19. Completely re-implemented the support for maildirsize files, in the light
4308 of a number of problems with the previous contributed implementation
4309 (4.30/29). In particular:
4311 . If the quota is zero, the maildirsize file is maintained, but no quota is
4314 . If the maildir directory does not exist, it is created before any attempt
4315 to write a maildirsize file.
4317 . The quota value in the file is just a cache; if the quota is changed in
4318 the transport, the new value overrides.
4320 . A regular expression is available for excluding directories from the
4323 20. The autoreply transport checks the characters in options that define the
4324 message's headers; it allows continued headers, but it was checking with
4325 isspace() after an embedded newline instead of explicitly looking for a
4328 21. If all the "regular" hosts to which an address was routed had passed their
4329 expiry times, and had not reached their retry times, the address was
4330 bounced, even if fallback hosts were defined. Now Exim should go on to try
4333 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4334 equivalent code in the SMTP transport. Some hosts send humungous responses
4335 to HELO/EHLO, more than 1024 it seems.
4337 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4338 gives compiler warnings in some environments. I've now done it "properly",
4341 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4342 (because of problems with the built-in one) was declared to return uschar *
4343 instead of char *, causing compiler failure.
4345 25. Fixed a file descriptor leak when processing alias/forward files.
4347 26. Fixed a minor format string issue in dbfn.c.
4349 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4351 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4352 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4355 29. When a sender address is verified, it is cached, to save repeating the test
4356 when there is more than one recipient in a message. However, when the
4357 verification involves a callout, it is possible for different callout
4358 options to be set for different recipients. It is too complicated to keep
4359 track of this in the cache, so now Exim always runs a verification when a
4360 callout is required, relying on the callout cache for the optimization.
4361 The overhead is duplication of the address routing, but this should not be
4364 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4365 to be verified with callout=postmaster, and the main callout worked but the
4366 postmaster check failed, the verification correctly failed. However, if a
4367 subsequent RCPT command asked for sender verification *without* the
4368 postmaster check, incorrect caching caused this verification also to fail,
4371 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4372 it was not caching the DNS options (qualify_single, search_parents) that
4373 were used when the lookup failed. A subsequent lookup with different
4374 options therefore always gave the same answer, though there were cases
4375 where it should not have. (Example: a "domains = !$mx_any" option on a
4376 dnslookup router: the "domains" option is always processed without any
4377 widening, but the router might have qualify_single set.) Now Exim uses the
4378 cached value only when the same options are set.
4380 32. Added John Jetmore's "exipick" utility to the distribution.
4382 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4383 than a timeout (e.g. a certificate is required, and is not provided), an
4384 Exim server now closes the connection immediately. Previously it waited for
4385 the client to close - but if the client is SSL, it seems that they each
4386 wait for each other, leading to a delay before one of them times out.
4388 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4389 maintained 0.8.x compatibility because I don't think many are using it, and
4390 it is clearly obsolete.
4392 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4395 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4396 client certificate was expired. A simple patch fixes this, though I don't
4397 understand the full logic of why the verify callback is called multiple
4400 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4401 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4402 which causes problems with some clients (such as the Certicom SSL Plus
4403 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4404 disables the coutermeasure allowing Eudora to connect."
4406 38. Exim was not checking that a write() to a log file succeeded. This could
4407 lead to Bad Things if a log got too big, in particular if it hit a file
4408 size limit. Exim now panics and dies if it cannot write to a log file, just
4409 as it does if it cannot open a log file.
4411 39. Modified OS/Makefile-Linux so that it now contains
4413 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4415 The two -D definitions ensure that Exim is compiled with large file
4416 support, which makes it possible to handle log files that are bigger than
4419 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4420 instance) a domain was checked against a named list that involved a lookup,
4421 causing $domain_data to be set, then another domain was checked against the
4422 same list, then the first domain was re-checked, the value of $domain_data
4423 after the final check could be wrong. In particular, if the second check
4424 failed, it could be set empty. This bug probably also applied to
4427 41. The strip_trailing_dot option was not being applied to the address given
4428 with the -f command-line option.
4430 42. The code for reading a message's header from the spool was incrementing
4431 $received_count, but never initializing it. This meant that the value was
4432 incorrect (doubled) while delivering a message in the same process in which
4433 it was received. In the most common configuration of Exim, this never
4434 happens - a fresh exec is done - but it can happen when
4435 deliver_drop_privilege is set.
4437 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4438 it now includes up to 150 characters of the unexpected data in the log
4441 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4442 and building data strings. The size of both of these buffers was 10 000
4443 bytes - far larger than anybody would *ever* want, thought I. Needless to
4444 say, somebody hit the limit. I have increased the maximum line length to
4445 20 000 and the maximum data length of concatenated lines to 100 000. I have
4446 also fixed two bugs, because there was no checking on these buffers. Tsk,
4447 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4448 buffer is too small.
4450 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4451 lsearch lookups. Now it does.
4453 46. When parsing a route_list item in a manualroute router, a fixed-length
4454 buffer was used for the list of hosts. I made this 1024 bytes long,
4455 thinking that nobody would ever have a list of hosts that long. Wrong.
4456 Somebody had a whole pile of complicated expansion conditions, and the
4457 string was silently truncated, leading to an expansion error. It turns out
4458 that it is easier to change to an unlimited length (owing to other changes
4459 that have happened since this code was originally written) than to build
4460 structure for giving a limitation error. The length of the item that
4461 expands into the list of hosts is now unlimited.
4463 47. The lsearch lookup could not handle data where the length of text line was
4464 more than 4095 characters. Such lines were truncated, leading to shortened
4465 data being returned. It should now handle lines of any length.
4467 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4468 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4471 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4472 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4473 no longer happens in comment lines. A list of replacements is now placed
4474 at the head of all of the source files, except those whose only change is
4475 to replace PERL_COMMAND in the very first #! line.
4477 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4478 messages on the queue, with a bottom-up merge sort, using code contributed
4479 by Michael Haardt. This should make operations like -bp somewhat faster on
4480 large queues. It won't affect queue runners, except when queue_run_in_order
4483 51. Installed eximstats 1.31 in the distribution.
4485 52. Added support for SRV lookups to the dnslookup router.
4487 53. If an ACL referred to $message_body or $message_body_end, the value was not
4488 reset for any messages that followed in the same SMTP session.
4490 54. The store-handling optimization for building very long strings was not
4491 differentiating between the different store pools. I don't think this
4492 actually made any difference in practice, but I've tidied it.
4494 55. While running the routers to verify a sender address, $sender_address
4495 was still set to the sender address. This is wrong, because when routing to
4496 send a bounce to the sender, it would be empty. Therefore, I have changed
4497 it so that, while verifying a sender address, $sender_address is set to <>.
4498 (There is no change to what happens when verifying a recipient address.)
4500 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4501 target A or AAAA records (if not already returned) without resetting the
4502 qualify_single or search_parents options of the DNS resolver. These are
4503 inappropriate in this case because the targets of MX and SRV records must
4504 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4505 target that, when qualified, matched something in the local domain. These
4506 two options are now turned off when doing these lookups.
4508 57. It seems that at least some releases of Reiserfs (which does not have the
4509 concept of a fixed number of inodes) returns zero and not -1 for the
4510 number of available inodes. This interacted badly with check_spool_inodes,
4511 which assumed that -1 was the "no such thing" setting. What I have done is
4512 to check that the total number of inodes is greater than zero before doing
4513 the test of how many are available.
4515 58. When a "warn" ACL statement has a log_message modifier, the message is
4516 remembered, and not repeated. This is to avoid a lot of repetition when a
4517 message has many recipients that cause the same warning to be written.
4518 Howewer, Exim was preserving the list of already written lines for an
4519 entire SMTP session, which doesn't seem right. The memory is now reset if a
4520 new message is started.
4522 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4523 debugging output unless log_rewrite was also set.
4525 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4526 of (int)(handle) when we know that handle contains (void *)(-1).
4528 61. The Exim daemon panic-logs an error return when it closes the incoming
4529 connection. However "connection reset by peer" seems to be common, and
4530 isn't really an error worthy of noting specially, so that particular error
4533 62. When Exim is trying to find all the local interfaces, it used to panic and
4534 die if the ioctl to get the interface flags failed. However, it seems that
4535 on at least one OS (Solaris 9) it is possible to have an interface that is
4536 included in the list of interfaces, but for which you get a failure error
4537 for this call. This happens when the interface is not "plumbed" into a
4538 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4539 failure of the "get flags" call assumes that the interface is down.
4541 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4542 makes life easier for people who are doing arithmetic on fields extracted
4543 from dates, where you often get leading zeros that should not be
4544 interpreted as octal.
4546 64. Added qualify_domain to the redirect router, to override the global
4549 65. If a pathologically long header line contained very many addresses (the
4550 report of this problem mentioned 10 000) and each of them was rewritten,
4551 Exim could use up a very large amount of memory. (It kept on making new
4552 copies of the header line as it rewrote, and never released the old ones.)
4553 At the expense of a bit more processing, the header rewriting function has
4554 been changed so that it no longer eats memory in this way.
4556 66. The generation of the Received: header has been moved from the time that a
4557 message starts to be received, to the time that it finishes. The timestamp
4558 in the Received: header should now be very close to that of the <= log
4559 line. There are two side-effects of this change:
4561 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4562 logged header lines no longer include the local Received: line, because
4563 it has not yet been created. The same applies to a copy of the message
4564 that is returned to a non-SMTP sender when a message is rejected.
4566 (b) When a filter file is tested using -bf, no additional Received: header
4567 is added to the test message. After some thought, I decided that this
4570 This change does not affect the value of $received_for. It is still set
4571 after address rewriting, but before local_scan() is called.
4573 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4575 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4576 gave an unhelpful panic error message, and a defer error. I have managed to
4577 change this behaviour so that it now rejects any supplied certificate,
4578 which seems right, as the list of acceptable certificates is empty.
4580 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4581 gave an unhelpful defer error. I have not managed to make this reject any
4582 supplied certificates, but the error message it gives is "no certificate
4583 supplied", which is not helpful.
4585 70. exigrep's output now also includes lines that are not associated with any
4586 message, but which match the given pattern. Implemented by a patch from
4587 Martin Sluka, which also tidied up the Perl a bit.
4589 71. Recipient callout verification, like sender verification, was using <> in
4590 the MAIL FROM command. This isn't really the right thing, since the actual
4591 sender may affect whether the remote host accepts the recipient or not. I
4592 have changed it to use the actual sender in the callout; this means that
4593 the cache record is now keyed on a recipient/sender pair, not just the
4594 recipient address. There doesn't seem to be a real danger of callout loops,
4595 since a callout by the remote host to check the sender would use <>.
4596 [SEE ABOVE: changed after hitting problems.]
4598 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4599 temporary errors. However, in the case of such a code being given after
4600 the end of a data transmission (i.e. after ".") Exim was failing to write
4601 a retry record for the message. (Yes, there was some broken host that was
4602 actually sending 8xx at this point.)
4604 73. An unknown lookup type in a host list could cause Exim to panic-die when
4605 the list was checked. (An example that provoked this was putting <; in the
4606 middle of a list instead of at the start.) If this happened during a DATA
4607 ACL check, a -D file could be left lying around. This kind of configuration
4608 error no longer causes Exim to die; instead it causes a defer errror. The
4609 incident is still logged to the main and panic logs.
4611 74. Buglet left over from Exim 3 conversion. The message "too many messages
4612 in one connection" was written to the rejectlog but not the mainlog, except
4613 when address rewriting (yes!) was being logged.
4615 75. Added write_rejectlog option.
4617 76. When a system filter was run not as root (that is, when system_filter_user
4618 was set), the values of the $n variables were not being returned to the
4619 main process; thus, they were not subsequently available in the $sn
4622 77. Added +return_path_on_delivery log selector.
4624 78. A connection timeout was being treated differently from recipients deferred
4625 when testing hosts_max_try with a message that was older than the host's
4626 retry timeout. (The host should not be counted, thus allowing all hosts to
4627 be tried at least once before bouncing.) This may have been the cause of an
4628 occasionally reported bug whereby a message would remain on the queue
4629 longer than the retry timeout, but would be bounced if a delivery was
4630 forced. I say "may" because I never totally pinned down the problem;
4631 setting up timeout/retry tests is difficult. See also the next item.
4633 79. The ultimate address timeout was not being applied to errors that involved
4634 a combination of host plus message (for example, a timeout on a MAIL
4635 command). When an address resolved to a number of possible hosts, and they
4636 were not all tried for each delivery (e.g. because of hosts_max_try), a
4637 message could remain on the queue longer than the retry timeout.
4639 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4642 81. Fixed an obscure SMTP outgoing bug which required at least the following
4643 conditions: (a) there was another message waiting for the same server;
4644 (b) the server returned 5xx to all RCPT commands in the first message so
4645 that the message was not completed; (c) the server dropped the connection
4646 or gave a negative response to the RSET that Exim sends to abort the
4647 transaction. The observed case was a dropped connection after DATA that had
4648 been sent in pipelining mode. That is, the server had advertised PIPELINING
4649 but was not implementing it correctly. The effect of the bug was incorrect
4650 behaviour, such as trying another host, and this could lead to a crash.
4656 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4657 and daemon.c were passed as pointers to ints; they should have been
4658 pointers to socklen_t variables (which are typically unsigned ints).
4660 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4663 3. Fixed a really odd bug that affected only the testing scheme; patching a
4664 certain fixed string in the binary changed the value of another string that
4665 happened to be identical to the end of the original first string.
4667 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4668 name", it returns that address as the IP address. On some operating
4669 systems (e.g. Solaris), it also passes back the IP address string as the
4670 "host name". However, on others (e.g. Linux), it passes back an empty
4671 string. Exim wasn't checking for this, and was changing the host name to an
4672 empty string, assuming it had been canonicized.
4674 5. Although rare, it is permitted to have more than one PTR record for a given
4675 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4676 all the names associated with an address, because they do in Solaris.
4677 However, it seems that they do not in Linux for data that comes from the
4678 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4679 I found this out when I moved to a new Linux workstation and tried to run
4680 the Exim test suite.
4682 To get round this problem I have changed the code so that it now does its
4683 own call to the DNS to look up PTR records when searching for a host name.
4684 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4685 addresses that are only in /etc/hosts are still found.
4687 This behaviour is, however, controlled by an option called host_lookup_
4688 order, which defaults to "bydns:byaddr". If people want to use the other
4689 order, or indeed, just use one or the other means of lookup, they can
4690 specify it in this variable.
4692 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4693 some operating systems, this comes back from gethostbyaddr() as an empty
4694 string, and this is what Exim used to test for. However, it seems that in
4695 other systems, "." is yielded. Exim now tests for this case too.
4697 7. The values of check_spool_space and check_log_space are now held internally
4698 as a number of kilobytes instead of an absolute number of bytes. If a
4699 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4700 kilobyte. This means that much larger values can be stored.
4702 8. Exim monitor: an attempt to get the action menu when not actually pointing
4703 at a message produces an empty menu entitled "No message selected". This
4704 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4705 no entries in it ("Shell widget menu has zero width and/or height"). So I
4706 have added a single, blank menu entry in this case.
4708 9. Added ${quote_local_part.
4710 10. MIME decoding is now applied to the contents of Subject: header lines when
4713 11. Now that a reference to $sender_host_address automatically causes a reverse
4714 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4715 host lookup before query-style lookups in lists that might use this
4716 variable. This has therefore been abolished, and the "net-" prefix is no
4717 longer necessary for query-style lookups.
4719 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4720 have been a typo for LFLAGS, so it has been changed.
4722 13. The install script calls Exim with "-C /dev/null" in order to find the
4723 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4724 to be output. Howeve, since Exim outputs its version number before the
4725 error, it didn't break the script. It just looked ugly. I fixed this by
4726 always allowing "-C /dev/null" if the caller is root.
4728 14. Ignore overlarge ACL variable number when reading spool file - insurance
4729 against a later release with more variables having written the file.
4731 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4732 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4733 this, as well as the form without the "IPv6" on the front.
4735 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4736 OS/Makefile-Darwin file.
4738 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4739 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4741 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4742 variable. However, some OS use ints for inodes. I've added cast to long int
4743 to get rid of the compiler warning.
4745 19. I had forgotten to lock out "/../" in configuration file names when
4746 ALT_CONFIG_PREFIX was set.
4748 20. Routers used for verification do not need to specify transports. However,
4749 if such a router generated a host list, and callout was configured, Exim
4750 crashed, because it could not find a port number from the (non-existent)
4751 transport. It now assumes port 25 in this circumstance.
4753 21. Added the -t option to exigrep.
4755 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4756 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4757 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4758 them is set, LOOKUP_LSEARCH is forced.
4760 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4762 24. Added sender and host information to the "rejected by local_scan()" log
4763 line; previously there was no indication of these.
4765 25. Added .include_if_exists.
4767 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4768 Linux. It turns out that not all file systems support this. Apparently some
4769 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4770 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4771 not supported on the file descriptor, is now ignored when Exim is trying to
4772 sync a directory. This applies only to Linux.
4774 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4776 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4777 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4780 29. Added support for maildirsize files from supplied patch (modified a bit).
4782 30. The use of :fail: followed by an empty string could lead Exim to respond to
4783 sender verification failures with (e.g.):
4785 550 Verification failed for <xxx>
4786 550 Sender verify failed
4788 where the first response line was missing the '-' that indicates it is not
4789 the final line of the response.
4791 31. The loop for finding the name of the user that called Exim had a hardwired
4792 limit of 10; it now uses the value of finduser_retries, which is used for
4793 all other user lookups.
4795 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4798 33. Exim was neglecting to zero errno before one call of strtol() when
4799 expanding a string and expecting an integer value. On some systems this
4800 resulted in spurious "integer overflow" errors. Also, it was casting the
4801 result into an int without checking.
4803 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4804 did not work. The code looks as if it has *never* worked, though it appears
4805 to have been documented since at least releast 1.62. I have made it work.
4807 35. The "timeout_DNS" error in retry rules, also documented since at least
4808 1.62, also never worked. As it isn't clear exactly what this means, and
4809 clearly it isn't a major issue, I have abolished the feature by treating it
4810 as "timeout", and writing a warning to the main and panic logs.
4812 36. The display of retry rules for -brt wasn't always showing the error code
4815 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4816 timeout_connect_A, timeout_connect_MX.
4818 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4819 to the empty sender.
4821 39. The daemon was not analysing the content of -oX till after it had closed
4822 stderr and disconnected from the controlling terminal. This meant that any
4823 syntax errors were only noted on the panic log, and the return code from
4824 the command was 0. By re-arranging the code a little, I've made the
4825 decoding happen first, so such errors now appear on stderr, and the return
4826 code is 1. However, the actual setting up of the sockets still happens in
4827 the disconnected process, so errors there are still only recorded on the
4830 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4831 connections (as happens on some IP stacks) was logged at start up time as
4832 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4833 it from "IPv6 and IPv4", which means that two separate sockets are being
4836 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4837 says whether AF_INET or AF_INET6 was passed as an argument.
4839 42. Exiwhat output was messed up when time zones were included in log
4842 43. Exiwhat now gives more information about the daemon's listening ports,
4843 and whether -tls-on-connect was used.
4845 44. The "port" option of the smtp transport is now expanded.
4847 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4848 silently ignored. Now an error message is written to the main and panic
4851 46. There's a new ACL modifier called "logwrite" which writes to a log file
4852 as soon as it is encountered.
4854 47. Added $local_user_uid and $local_user_gid at routing time.
4856 48. Exim crashed when trying to verify a sender address that was being
4859 49. Exim was recognizing only a space character after ".include". It now also
4860 recognizes a tab character.
4862 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4863 extracting the relevant information from the specification. The man page no
4864 longer contains scrambled data for the -d option, and I've added a section
4865 at the front about calling Exim under different names.
4867 51. Added "extra_headers" argument to the "mail" command in filter files.
4869 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4872 53. Installed eximstats 1.29.
4874 54. Added transport_filter_timeout as a generic transport option.
4876 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4877 Cc: header lines. This was required by RFC 822, but it not required by RFC
4880 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4881 incoming messages that did not have them. Now it does so only if the
4882 message originates locally, that is, if there is no associated remote host
4883 address. When Resent- header lines are present, this applies to the Resent-
4884 lines rather than the non-Resent- lines.
4886 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4887 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4889 58. Messages for configuration errors now include the name of the main
4890 configuration file - useful now that there may be more than one file in a
4891 list (.included file names were always shown).
4893 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4894 for those rare installations that do not start the daemon as root or run it
4895 setuid root. I've cut out the call to initgroups() if the daemon is not
4898 60. The Exim user and group can now be bound into the binary as text strings
4899 that are looked up at the start of Exim's processing.
4901 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4903 62. Added $mailstore_basename variable.
4905 63. Installed patch to sieve.c from Michael Haardt.
4907 64. When Exim failed to open the panic log after failing to open the main log,
4908 the original message it was trying to log was written to stderr and debug
4909 output, but if they were not available (the usual case in production), it
4910 was lost. Now it is written to syslog before the two lines that record the
4911 failures to open the logs.
4913 65. Users' Exim filters run in subprocesses under the user's uid. It is
4914 possible for a "deliver" command or an alias in a "personal" command to
4915 provoke an address rewrite. If logging of address rewriting is configured,
4916 this fails because the process is not running as root or exim. There may be
4917 a better way of dealing with this, but for the moment (because 4.30 needs
4918 to be released), I have disabled address rewrite logging when running a
4919 filter in a non-root, non-exim process.
4925 1. The buildconfig auxiliary program wasn't quoting the value set for
4926 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4927 not defined. This bug was masked in 4.22 by the effect that was fixed in
4930 2. Some messages that were rejected after a message id was allocated were
4931 shown as "incomplete" by exigrep. It no longer does this for messages that
4932 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4934 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4935 have allow_domain_literals set, the ID did not get logged in the <= line.
4936 Domain literals are now always recognized in Message-ID: header lines.
4938 4. The first argument for a ${extract expansion item is the key name or field
4939 number. Leading and trailing spaces in this item were not being ignored,
4940 causing some misleading effects.
4942 5. When deliver_drop_privilege was set, single queue runner processes started
4943 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4944 same command in the process it spins off) were not dropping privilege.
4946 6. When the daemon running as "exim" started a queue runner, it always
4947 re-executed Exim in the spun-off process. This is a waste of effort when
4948 deliver_drop_privilege is set. The new process now just calls the
4949 queue-runner function directly.
4955 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4958 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4959 ignored. Though the use of -oP was forcing the writing of a pid file, it
4960 was always written to the default place.
4962 3. If the message "no IP address found for host xxxx" is generated during
4963 incoming verification, it is now followed by identification of the incoming
4964 connection (so you can more easily find what provoked it).
4966 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4968 5. Added some features to "harden" Exim a bit more against certain attacks:
4970 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4971 be put in Local/Makefile. This is like the never_users runtime option,
4972 but it cannot be overridden. The default setting is "root".
4974 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4975 prefix string with which any file named in a -C command line option
4978 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4979 is retained for -C and -D only if the caller of Exim is root. Without
4980 it, the exim user may also use -C and -D and retain privilege.
4982 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4983 command line option is disabled.
4985 6. Macro names set by the -D option must start with an upper case letter, just
4986 like macro names defined in the configuration file.
4988 7. Added "dereference=" facility to LDAP.
4990 8. Two instances of the typo "uknown" in the source files are fixed.
4992 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4993 the Configure-Makefile script screwed up while processing it.
4995 10. Incorporated PCRE 4.4.
4997 11. The SMTP synchronization check was not operating right at the start of an
4998 SMTP session. For example, it could not catch a HELO sent before the client
4999 waited for the greeting. There is now a check for outstanding input at the
5000 point when the greeting is written. Because of the duplex, asynchronous
5001 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5002 way, but not yet received, when the check is performed.
5004 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5005 on TCP/IP sockets, because this apparently causes some broken clients to
5008 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5009 unchanged) from the Cygwin maintainer.
5011 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5012 was supported instead of testing for mbx. Effectively a typo.
5014 15. The spa authenticator server code was not checking that the input it
5015 received was valid base64.
5017 16. The debug output line for the "set" modifier in ACLs was not showing the
5018 name of the variable that was being set.
5020 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5022 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5023 lookup on its own. Something else was needed to trigger the lookup. For
5024 example, a match in host_lookup or the need for a host name in a host list.
5025 Now, if $sender_host_name is referenced and the host name has not yet been
5026 looked up, a lookup is performed. If the lookup fails, the variable remains
5027 empty, and $host_lookup_failed is set to "1".
5029 19. Added "eqi" as a case-independent comparison operator.
5031 20. The saslauthd authentication condition could segfault if neither service
5032 nor realm was specified.
5034 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5035 error message that was logged was misleading, and incoming SMTP
5036 connections were dropped. The message is now more accurate, and temporary
5037 errors are given to SMTP connections.
5039 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5040 (except RSET) with a 421 error, until QUIT is received. However, it was
5041 failing to send a response to QUIT.
5043 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5044 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5045 ACL is now run after the helo_try_verify_hosts code.
5047 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5048 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5049 case-independent, so other case variants are also recognized). Apparently
5050 some systems use these upper case variants.
5052 25. If more than two messages were waiting for the same host, and a transport
5053 filter was specified for the transport, Exim sent two messages over the
5054 same TCP/IP connection, and then failed with "socket operation on non-
5055 socket" when it tried to send the third.
5057 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5059 27. The extern definition of crypt16() in expand.c was not being excluded when
5060 the OS had its own crypt16() function.
5062 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5063 as a preferred synonym for return_size_limit, both as an option and as an
5066 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5068 30. Changed the default configuration ACL to relax the local part checking rule
5069 for addresses that are not in any local domains. For these addresses,
5070 slashes and pipe symbols are allowed within local parts, but the sequence
5071 /../ is explicitly forbidden.
5073 31. SPA server authentication was not clearing the challenge buffer before
5076 32. log_message in a "warn" ACL statement was writing to the reject log as
5077 well as to the main log, which contradicts the documentation and doesn't
5078 seem right (because no rejection is happening). So I have stopped it.
5080 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5081 However, I am unable to do any testing of this.
5083 34. Fixed an infelicity in the appendfile transport. When checking directories
5084 for a mailbox, to see if any needed to be created, it was accidentally
5085 using path names with one or more superfluous leading slashes; tracing
5086 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5088 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5089 contents are added to the log line that is written for every discarded
5090 recipient. (Previously a log_message setting was ignored.)
5092 36. The ${quote: operator now quotes the string if it is empty.
5094 37. The install script runs exim in order to find its version number. If for
5095 some reason other than non-existence or emptiness, which it checks, it
5096 could not run './exim', it was installing it with an empty version number,
5097 i.e. as "exim-". This error state is now caught, and the installation is
5100 38. An argument was missing from the function that creates an error message
5101 when Exim fails to connect to the socket for saslauthd authentication.
5102 This could cause Exim to crash, or give a corrupted message.
5104 39. Added isip, isip4, and isip6 to ${if conditions.
5106 40. The ACL variables $acl_xx are now saved with the message, and can be
5107 accessed later in routers, transports, and filters.
5109 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5110 strings in the file are not string-expanded.
5112 42. If a MAIL command specified a SIZE value that was too large to fit into an
5113 int variable, the check against message_size_limit failed. Such values are
5114 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5115 day this will have to be increased, but I don't think I want to be around
5116 when emails are that large.
5123 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5124 iconv() is not standard in FreeBSD.
5126 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5127 IPv6 enabled. The observed symptom was a segmentation fault on return from
5128 the function os_common_find_running_interfaces() in src/os.c.
5130 3. In the check_special_case() function in daemon.c I had used "errno" as an
5131 argument name, which causes warnings on some systems. This was basically a
5132 typo, since it was named "eno" in the comments!
5134 4. The code that waits for the clock to tick (at a resolution of some fraction
5135 of a second) so as to ensure message-id uniqueness was always waiting for
5136 at least one whole tick, when it could have waited for less. [This is
5137 almost certainly not relevant at current processor speeds, where it is
5138 unlikely to ever wait at all. But we try to future-proof.]
5140 5. The function that sleeps for a time interval that includes fractions of a
5141 second contained a race. It did not block SIGALRM between setting the
5142 timer, and suspending (a couple of lines later). If the interval was short
5143 and the sigsuspend() was delayed until after it had expired, the suspension
5144 never ended. On busy systems this could lead to processes getting stuck for
5147 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5148 process, before it forks any delivery processes. The open lookup caching
5149 mechanism meant that the open file or database connection was passed into
5150 the delivery process. The problem was that delivery processes always tidy
5151 up cached lookup data. This could cause a problem for the next delivery
5152 process started by the queue runner, because the external queue runner
5153 process does not know about the closure. So the next delivery process
5154 still has data in the lookup cache. In the case of a file lookup, there was
5155 no problem because closing a file descriptor in a subprocess doesn't affect
5156 the parent. However, if the lookup was caching a connection to a database,
5157 the connection was closed, and the second delivery process was likely to
5158 see errors such as "PGSQL: query failed: server closed the connection
5159 unexpectedly". The problem has been fixed by closing all cached lookups
5160 in a queue runner before running a delivery process.
5162 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5163 seem to have the "const" qualifier which it has on other OS. I've
5166 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5167 *of the same type* (client or server) with the same public name that an
5168 error should be diagnosed.
5170 9. When Exim looked up a host name for an IP address, but failed to find the
5171 original IP address when looking up the host name (a safety check), it
5172 output the message "<ip address> does not match any IP for NULL", which was
5173 confusing, to say the least. The bug was that the host name should have
5174 appeared instead of "NULL".
5176 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5177 user that is built into the binary, and the -C or -D options is used, root
5178 privilege is dropped before the configuration file is read. In addition,
5179 logging is switched to stderr instead of the normal log files. If the
5180 configuration then re-defines the Exim user, the unprivileged environment
5181 is probably not what is expected, so Exim logs a panic warning message (but
5184 However, if deliver_drop_privilege is set, the unprivileged state may well
5185 be exactly what is intended, so the warning has been cut out in that case,
5186 and Exim is allowed to try to write to its normal log files.
5192 1. smtp_return_error_details was not giving details for temporary sender
5193 or receiver verification errors.
5195 2. Diagnose a configuration error if two authenticators have the same public
5198 3. Exim used not to create the message log file for a message until the first
5199 delivery attempt. This could be confusing when incoming messages were held
5200 for policy or load reasons. The message log file is now created at the time
5201 the message is received, and an initial "Received" line is written to it.
5203 4. The automatically generated man page for command line options had a minor
5204 bug that caused no ill effects; however, a more serious problem was that
5205 the procedure for building the man page automatically didn't always
5206 operate. Consequently, release 4.20 contains an out-of-date version. This
5207 shouldn't happen again.
5209 5. When building Exim with embedded Perl support, the script that builds the
5210 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5211 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5213 6. The freeze_tell option was not being used for messages that were frozen on
5214 arrival, either by an ACL or by local_scan().
5216 7. Added the smtp_incomplete_transaction log selector.
5218 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5219 was accepting AUTH without a new EHLO.
5221 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5222 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5225 10. Logging of TCP/IP connections (when configured) now happens in the main
5226 daemon process instead of the child process, so that the TCP/IP connection
5227 count is more accurate (but it can never be perfect).
5229 11. The use of "drop" in a nested ACL was not being handled correctly in the
5230 outer ACL. Now, if condition failure induced by the nested "drop" causes
5231 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5232 or "require"), the connection is dropped.
5234 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5235 that yield "discard" can now be used with an "accept" or a "discard" verb,
5236 but an error is generated for any others (because I can't see a useful way
5237 to define what should happen).
5239 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5240 are now processed in the same way as lines in the Exim configuration file.
5241 In particular, continuation lines are supported.
5243 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5245 15. Added -ti meaning -t -i.
5247 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5248 domains, and warn by logging if others are found.
5250 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5251 returned from GIFCONF when Exim is trying to find the list of interfaces on
5252 a host. The code in os.c has been modified to copy each ifreq to an aligned
5253 structure in all cases.
5255 Also, in some cases, the returned ifreq's were being copied to a 'struct
5256 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5257 means the last couple of bytes of an IPv6 address could be chopped if the
5258 ifreq contained only a normal sockaddr (14 bytes storage).
5260 18. Named domain lists were not supported in the hosts_treat_as_local option.
5261 An entry such as +xxxx was not recognized, and was treated as a literal
5264 19. Ensure that header lines added by a DATA ACL are included in the reject log
5265 if the ACL subsequently rejects the message.
5267 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5268 MD5 (which is deprecated).
5270 21. When testing a filter file using -bf, Exim was writing a message when it
5271 took the sender from a "From " line in the message, but it was not doing so
5272 when it took $return_path from a Return-Path: header line. It now does.
5274 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5275 with a valid header line field name (a series of printing characters
5276 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5278 23. Changed "disc" in the source to "disk" to conform to the documentation and
5279 the book and for uniformity.
5281 24. Ignore Sendmail's -Ooption=value command line item.
5283 25. When execve() failed while trying to run a command in a pipe transport,
5284 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5285 could be confused with a return value of 69 from the command itself. This
5286 has been changed to 127, the value the shell returns if it is asked to run
5287 a non-existent command. The wording for the related log line suggests a
5288 non-existent command as the problem.
5290 26. If received_header_text expands to an empty string, do not add a Received:
5291 header line to the message. (Well, it adds a token one on the spool, but
5292 marks it "old" so that it doesn't get used or transmitted.)
5294 27. Installed eximstats 1.28 (addition of -nt option).
5296 28. There was no check for failure on the call to getsockname() in the daemon
5297 code. This can fail if there is a shortage of resources on the system, with
5298 ENOMEM, for example. A temporary error is now given on failure.
5300 29. Contrary to the C standard, it seems that in some environments, the
5301 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5302 program. Exim now does this explicitly; it affects the formatting of
5303 timestamps using strftime().
5305 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5306 complaints. I've now initialized all the variables, to avoid this.
5308 32. Header lines added by a system filter were not being "seen" during
5309 transport-time rewrites.
5311 33. The info_callback() function passed to OpenSSL is set up with type void
5312 (*)(SSL *, int, int), as described somewhere. However, when calling the
5313 function (actually a macro) that sets it up, the type void(*)() is
5314 expected. I've put in a cast to prevent warnings from picky compilers.
5316 34. If a DNS black list lookup found a CNAME record, but there were no A
5317 records associated with the domain it pointed at, Exim crashed.
5319 35. If a DNS black list lookup returned more than one A record, Exim ignored
5320 all but the first. It now scans all returned addresses if a particular IP
5321 value is being sought. In this situation, the contents of the
5322 $dnslist_value variable are a list of all the addresses, separated by a
5325 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5326 to accept a host name and all its aliases if the forward lookup for any of
5327 them yielded the IP address of the incoming connection. Now it accepts only
5328 those names whose forward lookup yields the correct IP address. Any other
5329 names are discarded. This closes a loophole whereby a rogue DNS
5330 administrator could create reverse DNS records to break through a
5331 wildcarded host restriction in an ACL.
5333 37. If a user filter or a system filter that ran in a subprocess used any of
5334 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5335 the wrong values were passed to the pipe command ($thisaddress had the
5336 value of $0, $0 had the value of $1, etc). This bug was introduced by
5337 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5339 38. Improved the line breaking for long SMTP error messages from ACLs.
5340 Previously, if there was no break point between 40 and 75 characters, Exim
5341 left the rest of the message alone. Two changes have been made: (a) I've
5342 reduced the minimum length to 35 characters; (b) if it can't find a break
5343 point between 35 and 75 characters, it looks ahead and uses the first one
5344 that it finds. This may give the occasional overlong line, but at least the
5345 remaining text gets split now.
5347 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5348 file descriptors might be low, and that setting 1000 would always raise it.
5349 It turns out that in some environments, the limit is already over 1000 and
5350 that lowering it causes trouble. So now Exim takes care not to decrease it.
5352 40. When delivering a message, the value of $return_path is set to $sender_
5353 address at the start of routing (routers may change the value). By an
5354 oversight, this default was not being set up when an address was tested by
5355 -bt or -bv, which affected the outcome if any router or filter referred to
5358 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5359 log only when "message" or "log_message" are set. However, if one of the
5360 conditions was an address verification, or a call to a nested ACL, the
5361 messages generated by the underlying test were being passed through. This
5362 no longer happens. The underlying message is available in $acl_verify_
5363 message for both "message" and "log_message" expansions, so it can be
5364 passed through if needed.
5366 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5367 new expansion $bh_ to give the encoded byte string without charset
5368 translation. Translation happens only if iconv() is available; HAVE_ICONV
5369 indicates this at build time. HEADERS_CHARSET gives the charset to
5370 translate to; headers_charset can change it in the configuration, and
5371 "headers charset" can change it in an individual filter file.
5373 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5374 that creates RFC 2047 encoded "words" labels them as that charset instead
5375 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5376 expansion operator; (ii) when Exim creates a From: line for a local
5377 message; (iii) when a header line is rewritten to include a "phrase" part.
5379 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5380 buggy, causing it to skip the first lines of messages whose message ID
5381 ended in 'D'. This would not have bitten before Exim release 4.14, because
5382 message IDs were unlikely to end in 'D' before then. The effect was to have
5383 incorrect size information for certain domains.
5385 45. #include "config.h" was missing at the start of the crypt16.c module. This
5386 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5389 46. If there was a timeout during a "random" callout check, Exim treated it as
5390 a failure of the random address, and carried on sending RSET and the real
5391 address. If the delay was just some slowness somewhere, the response to the
5392 original RCPT would be taken as a response to RSET and so on, causing
5393 mayhem of various kinds.
5395 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5396 when I implemented it. It didn't allow for the fact that some option values
5397 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5398 the right test for positive values.
5400 48. Domain names in DNS records are case-independent. Exim always looks them up
5401 in lower case. Some resolvers return domain names in exactly the case they
5402 appear in the zone file, that is, they may contain uppercase letters. Not
5403 all resolvers do this - some return always lower case. Exim was treating a
5404 change of case by a resolver as a change of domain, similar to a widening
5405 of a domain abbreviation. This triggered its re-routing code and so it was
5406 trying to route what was effectively the same domain again. This normally
5407 caused routing to fail (because the router wouldn't handle the domain
5408 twice). Now Exim checks for this case specially, and just changes the
5409 casing of the domain that it ultimately uses when it transmits the message
5412 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5415 50. If a filter generated a file delivery with a non-absolute name (possible if
5416 no home directory exists for the router), the forbid_file option was not
5419 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5420 the existing equality matching.
5422 52. Exim was using ints instead of ino_t variables in some places where it was
5423 dealing with inode numbers.
5425 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5426 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5427 called TMPDIR, and if it finds it is different, it changes its value.
5429 54. The smtp_printf() function is now made available to local_scan() so
5430 additional output lines can be written before returning. There is also an
5431 smtp_fflush() function to enable the detection of a dropped connection.
5432 The variables smtp_input and smtp_batched_input are exported to
5435 55. Changed the default runtime configuration: the message "Unknown user"
5436 has been removed from the ACL, and instead placed on the localuser router,
5437 using the cannot_route_message feature. This means that any verification
5438 failures that generate their own messages won't get overridden. Similarly,
5439 the "Unrouteable address" message that was in the ACL for unverifiable
5440 relay addresses has also been removed.
5442 56. Added hosts_avoid_esmtp to the smtp transport.
5444 57. The exicyclog script was not checking for the esoteric option
5445 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5446 will work only if exicyclog is run under the appropriate euid.
5448 58. Following a discussion on the list, the rules by which Exim recognises line
5449 endings on incoming messages have been changed. The -dropcr and drop_cr
5450 options are now no-ops, retained only for backwards compatibility. The
5451 following line terminators are recognized: LF CRLF CR. However, special
5452 processing applies to CR:
5454 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5455 nor a local message in the state where . is a terminator.
5457 (ii) If a bare CR is encountered in a header line, an extra space is added
5458 after the line terminator so as not to end the header. The reasoning
5459 behind this is that bare CRs in header lines are most likely either
5460 to be mistakes, or people trying to play silly games.
5462 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5463 was being incorrectly given as 18 bytes larger than it should have been.
5464 This is a VOB (very old bug).
5466 60. This may never have affected anything current, but just in case it has:
5467 When the local host is found other than at the start of a list of hosts,
5468 the local host, those with the same MX, and any that follow, are discarded.
5469 When the list in question was part of a longer list of hosts, the following
5470 hosts (not currently being processed) were also being discarded. This no
5471 longer happens. I'm not sure if this situation could ever has previously
5474 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5477 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5478 header. This is something that is recommended in a new Internet Draft, and
5479 is something that is documented as being done by Sendmail. There are two
5480 possible values. For messages generated by the autoreply transport, Exim
5483 Auto-Submitted: auto-replied
5485 whereas for all other generated messages (e.g. bounces) it adds
5487 Auto-Submitted: auto-generated
5489 63. The "personal" condition in filters now includes a test for the
5490 Auto-Submitted: header. If it contains the string "auto-" the message it
5491 not considered personal.
5493 64. Added rcpt_include_affixes as a generic transport option.
5495 65. Added queue_only_override (default true).
5497 66. Added the syslog_duplication option.
5499 67. If what should have been the first header line of a message consisted of
5500 a space followed by a colon, Exim was mis-interpreting it as a header line.
5501 It isn't of course - it is syntactically invalid and should therefore be
5502 treated as the start of the message body. The misbehaviour could have
5503 caused a number of strange effects, including loss of data in subsequent
5504 header lines, and spool format errors.
5506 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5507 client host had authenticated. This control can now be exercised by an ACL
5508 for more flexibility.
5510 69. By default, callouts do not happen when testing with -bh. There is now a
5511 variant, -bhc, which does actually run the callout code, including
5512 consulting and updating the callout cache.
5514 70. Added support for saslauthd authentication, courtesy of Alexander
5517 71. If statvfs() failed on the spool or log directories while checking their
5518 size for availability, Exim confusingly gave the error "space shortage".
5519 Furthermore, in debugging mode it crashed with a floating point exception.
5520 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5521 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5522 serious problem, Exim now writes to the main and panic logs when this
5523 happens, with details of the failure. It then refuses to accept the
5524 incoming message, giving the message "spool directory problem" or "log
5525 directory problem" with a 421 code for SMTP messages.
5527 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5528 0, 1, and 2 exist, because some OS complain for execs without them (see
5529 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5530 descriptors. However, the code omitted to check that the open succeeded,
5531 causing mysterious errors if for some reason the permissions on /dev/null
5532 got screwed. Now Exim writes a message to the main and panic logs, and
5533 bombs out if it can't open /dev/null.
5535 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5536 interact so that it is all more flexible. It is supposed to remain
5537 backwards compatible. Also added extra_local_interfaces.
5539 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5540 to bomb out with an assertion failure - to the client this appears as a
5541 connection drop. This problem occurs in the part of the code that was taken
5542 from the Samba project. Fortunately, the assertion is in a very simple
5543 function, so I have fixed this by reproducing the function inline in the
5544 one place where it is called, and arranging for authentication to fail
5545 instead of killing the process with assert().
5547 75. The SPA client code was not working when the server requested OEM rather
5548 than Unicode encoding.
5550 76. Added code to make require_files with a specific uid setting more usable in
5551 the case where statting the file as root fails - usually a non-root-mounted
5552 NFS file system. When this happens and the failure is EACCES, Exim now
5553 forks a subprocess and does the per-uid checking as the relevant uid.
5555 77. Added process_log_path.
5557 78. If log_file_path was not explicitly set, a setting of check_log_space or
5558 check_log_inodes was ignored.
5560 79. If a space check for the spool or log partitions fails, the incident is now
5561 logged. Of course, in the latter case the data may get lost...
5563 80. Added the %p formatting code to string_format() so that it can be used to
5564 print addresses in debug_print(). Adjusted all the address printing in the
5565 debugging in store.c to use %p rather than %d.
5567 81. There was a concern that a line of code in smtp_in.c could overflow a
5568 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5569 initially expressed, the concern was not well-founded, because trailing
5570 spaces are removed early. However, if the trailing spaces were followed by
5571 a NULL, they did not get removed, so the overflow was possible. Two fixes
5574 (a) I re-wrote the offending code in a cleaner fashion.
5575 (b) If an incoming SMTP command contains a NULL character, it is rejected
5578 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5579 runs initgroups(), so that if the Exim user is in any additional groups,
5580 they will be used during message reception.
5586 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob