[exim.git] / doc / doc-txt / ChangeLog
1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
6 Exim version 4.74
7 -----------------
9 TF/01 Failure to get a lock on a hints database can have serious
10 consequences so log it to the panic log.
12 TF/02 Log LMTP confirmation messages in the same way as SMTP,
13 controlled using the smtp_confirmation log selector.
15 TF/03 Include the error message when we fail to unlink a spool file.
17 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
18 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
19 for maintaining out-of-tree patches for some time.
21 PP/01 Bugzilla 139: Documentation and portability issues.
22 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
23 Handle per-OS dynamic-module compilation flags.
25 PP/02 Let /dev/null have normal permissions.
26 The 4.73 fixes were a little too stringent and complained about the
27 permissions on /dev/null. Exempt it from some checks.
28 Reported by Andreas M. Kirchwitz.
30 PP/03 Report version information for many libraries, including
31 Exim version information for dynamically loaded libraries. Created
32 version.h, now support a version extension string for distributors
33 who patch heavily. Dynamic module ABI change.
36 Exim version 4.73
37 -----------------
39 PP/01 Date: & Message-Id: revert to normally being appended to a message,
40 only prepend for the Resent-* case. Fixes regression introduced in
41 Exim 4.70 by NM/22 for Bugzilla 607.
43 PP/02 Include check_rfc2047_length in configure.default because we're seeing
44 increasing numbers of administrators be bitten by this.
46 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
48 PP/03 Bugzilla 994: added openssl_options main configuration option.
50 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
52 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
54 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
56 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
57 without a peer certificate, leading to a segfault because of an
58 assumption that peers always have certificates. Be a little more
59 paranoid. Problem reported by Martin Tscholak.
61 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
62 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
63 NB: ClamAV planning to remove STREAM in "middle of 2010".
64 CL also introduces -bmalware, various -d+acl logging additions and
65 more caution in buffer sizes.
67 PP/09 Implemented reverse_ip expansion operator.
69 PP/10 Bugzilla 937: provide a "debug" ACL control.
71 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
73 PP/12 Bugzilla 973: Implement --version.
75 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
77 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
79 PP/15 Bugzilla 816: support multiple condition rules on Routers.
81 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
82 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
83 ignore trailing whitespace.
85 JJ/02 prevent non-panic DKIM error from being sent to paniclog
87 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
88 "exim" to be used
90 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
91 Notification from Dr Andrew Aitchison.
93 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
94 ExtendedDetectionInfo response format.
95 Notification from John Horne.
97 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
98 compatible.
100 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
101 XSL and documented dependency on system catalogs, with examples of how
102 it normally works.
104 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
105 access.
107 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
108 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
109 configuration file which is writeable by the Exim user or group.
111 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
112 of configuration files to cover files specified with the -C option if
113 they are going to be used with root privileges, not just the default
114 configuration file.
116 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
117 option (effectively making it always true).
119 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
120 files to be used while preserving root privileges.
122 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
123 that rogue child processes cannot use them.
125 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
126 run-time user, instead of root.
128 PP/28 Add WHITELIST_D_MACROS option to let some macros be overriden by the
129 Exim run-time user without dropping privileges.
131 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
132 result string, instead of calling string_vformat() twice with the same
133 arguments.
136 for other users. Others should always drop root privileges if they use
137 -C on the command line, even for a whitelisted configure file.
141 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
144 Exim version 4.72
145 -----------------
147 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
148 $data_path, and $header_path variables; fixed documentation bugs and
149 typos
151 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
152 exipick to access non-standard spools, including the "frozen" queue
153 (Finput)
155 NM/01 Bugzilla 965: Support mysql stored procedures.
156 Patch from Alain Williams
158 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
160 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
161 Patch from Andreas Metzler
163 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
164 Patch from Kirill Miazine
166 NM/05 Bugzilla 671: Added umask to procmail example.
168 JJ/03 installed exipick 20100323.0, fixing doc bug
170 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
171 directory. Notification and patch from Dan Rosenberg.
173 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
175 TK/02 Improve log output when DKIM signing operation fails.
177 MH/01 Treat the transport option dkim_domain as a colon separated
178 list, not as a single string, and sign the message with each element,
179 omitting multiple occurences of the same signer.
181 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
182 Bugzilla 985, 986. Patch by Simon Arlott
184 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
185 Patch by Simon Arlott
187 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
188 MBX locking. Notification from Dan Rosenberg.
191 Exim version 4.71
192 -----------------
194 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
196 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
198 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
200 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
202 NM/04 Bugzilla 915: Flag broken perl installation during build.
205 Exim version 4.70
206 -----------------
208 TK/01 Added patch by Johannes Berg that expands the main option
209 "spamd_address" if it starts with a dollar sign.
211 TK/02 Write list of recipients to X-Envelope-Sender header when building
212 the mbox-format spool file for content scanning (suggested by Jakob
213 Hirsch).
215 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
216 (http://www.dcc-servers.net/) support via dccifd. Activated by
217 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
219 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
220 by Mark Daniel Reidel <mr@df.eu>.
222 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
223 When building exim an external PCRE library is now needed -
224 PCRE is a system library on the majority of modern systems.
225 See entry on PCRE_LIBS in EDITME file.
227 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
228 conversation. Added nologin parameter to request.
229 Patch contributed by Kirill Miazine.
231 TF/01 Do not log submission mode rewrites if they do not change the address.
233 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
235 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
236 log files in place. Contributed by Roberto Lima.
238 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
240 TF/03 Bugzilla 615: When checking the local_parts router precondition
241 after a local_part_suffix or local_part_prefix option, Exim now
242 does not use the address's named list lookup cache, since this
243 contains cached lookups for the whole local part.
245 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
246 Robert Millan. Documentation is in experimental-spec.txt.
248 TF/04 Bugzilla 668: Fix parallel build (make -j).
250 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
252 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
253 Patch provided by Jan Srzednicki.
255 TF/05 Leading white space used to be stripped from $spam_report which
256 wrecked the formatting. Now it is preserved.
258 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
259 that they are available at delivery time.
261 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
263 TF/08 TLS error reporting now respects the incoming_interface and
264 incoming_port log selectors.
266 TF/09 Produce a more useful error message if an SMTP transport's hosts
267 setting expands to an empty string.
269 NM/06 Bugzilla 744: EXPN did not work under TLS.
270 Patch provided by Phil Pennock.
272 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
273 Patch provided by Richard Godbee.
275 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
276 acl_smtp_notquit, added index entry.
278 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
279 Patch provided by Eugene Bujak.
281 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
282 accept(). Patch provided by Maxim Dounin.
284 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
285 Patch provided by Phil Pennock.
287 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
289 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
290 Patch provided by Brad "anomie" Jorsch.
292 NM/14 Bugzilla 622: Added timeout setting to transport filter.
293 Patch provided by Dean Brooks.
295 TK/05 Add native DKIM support (does not depend on external libraries).
297 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
298 Patch provided by Graeme Fowler.
300 NM/16 Bugzilla 851: Documentation example syntax fix.
302 NM/17 Changed NOTICE file to remove references to embedded PCRE.
304 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
305 lsearch.
307 NM/19 Bugzilla 745: TLS version reporting.
308 Patch provided by Phil Pennock.
310 NM/20 Bugzilla 167: bool: condition support.
311 Patch provided by Phil Pennock.
313 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
314 clients. Patch provided by Phil Pennock.
316 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
317 Patch provided by Brad "anomie" Jorsch.
319 NM/23 Bugzilla 687: Fix misparses in eximstats.
320 Patch provided by Heiko Schlittermann.
322 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
323 Patch provided by Heiko Schlittermann.
325 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
326 plus update to original patch.
328 NM/26 Bugzilla 799: Documentation correction for ratelimit.
330 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
331 Patch provided by David Brownlee.
333 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
335 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
337 NM/30 Bugzilla 888: TLS documentation bugfixes.
339 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
341 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
342 Unlike the original bugzilla I have changed all shell scripts in src tree.
344 NM/33 Bugzilla 898: Transport filter timeout fix.
345 Patch by Todd Rinaldo.
347 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
348 Patch by Serge Demonchaux.
350 NM/35 Bugzilla 39: Base64 decode bug fixes.
351 Patch by Jakob Hirsch.
353 NM/36 Bugzilla 909: Correct connect() call in dcc code.
355 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
357 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
359 NM/39 Bugzilla 911: Fixed MakeLinks build script.
362 Exim version 4.69
363 -----------------
365 TK/01 Add preliminary DKIM support. Currently requires a forked version of
366 ALT-N's libdkim that I have put here:
367 http://duncanthrax.net/exim-experimental/
369 Note to Michael Haardt: I had to rename some vars in sieve.c. They
370 were called 'true' and it seems that C99 defines that as a reserved
371 keyword to be used with 'bool' variable types. That means you could
372 not include C99-style headers which use bools without triggering
373 build errors in sieve.c.
375 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
376 as mailq or other aliases. Changed the --help handling significantly
377 to do whats expected. exim_usage() emits usage/help information.
379 SC/01 Added the -bylocaldomain option to eximstats.
381 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
383 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
385 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
388 Exim version 4.68
389 -----------------
391 PH/01 Another patch from the Sieve maintainer.
393 PH/02 When an IPv6 address is converted to a string for single-key lookup
394 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
395 dots are used instead of colons so that keys in lsearch files need not
396 contain colons. This was done some time before quoting was made available
397 in lsearch files. However, iplsearch files do require colons in IPv6 keys
398 (notated using the quote facility) so as to distinguish them from IPv4
399 keys. This meant that lookups for IP addresses in host lists did not work
400 for iplsearch lookups.
402 This has been fixed by arranging for IPv6 addresses to be expressed with
403 colons if the lookup type is iplsearch. This is not incompatible, because
404 previously such lookups could never work.
406 The situation is now rather anomolous, since one *can* have colons in
407 ordinary lsearch keys. However, making the change in all cases is
408 incompatible and would probably break a number of configurations.
410 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
411 version.
413 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
414 conversion specification without a maximum field width, thereby enabling
415 a rogue spamd server to cause a buffer overflow. While nobody in their
416 right mind would setup Exim to query an untrusted spamd server, an
417 attacker that gains access to a server running spamd could potentially
418 exploit this vulnerability to run arbitrary code as the Exim user.
420 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
421 $primary_hostname instead of what libspf2 thinks the hosts name is.
423 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
424 a directory entry by the name of the lookup key. Previously, if a
425 symlink pointed to a non-existing file or a file in a directory that
426 Exim lacked permissions to read, a lookup for a key matching that
427 symlink would fail. Now it is enough that a matching directory entry
428 exists, symlink or not. (Bugzilla 503.)
430 PH/03 The body_linecount and body_zerocount variables are now exported in the
431 local_scan API.
433 PH/04 Added the $dnslist_matched variable.
435 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
436 This means they are set thereafter only if the connection becomes
437 encrypted.
439 PH/06 Added the client_condition to authenticators so that some can be skipped
440 by clients under certain conditions.
442 PH/07 The error message for a badly-placed control=no_multiline_responses left
443 "_responses" off the end of the name.
445 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
447 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
448 (without spaces) instead of just copying the configuration text.
450 PH/10 Added the /noupdate option to the ratelimit ACL condition.
452 PH/11 Added $max_received_linelength.
454 PH/12 Added +ignore_defer and +include_defer to host lists.
456 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
457 way in which PCRE > 7.0 is built.
459 PH/14 Implemented queue_only_load_latch.
461 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
462 MAIL command. The effect was to mangle the value on 64-bit systems.
464 PH/16 Another patch from the Sieve maintainer.
466 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
468 PH/18 If a system quota error occurred while trying to create the file for
469 a maildir delivery, the message "Mailbox is full" was not appended to the
470 bounce if the delivery eventually timed out. Change 4.67/27 below applied
471 only to a quota excession during the actual writing of the file.
473 PH/19 It seems that peer DN values may contain newlines (and other non-printing
474 characters?) which causes problems in log lines. The DN values are now
475 passed through string_printing() before being added to log lines.
477 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
478 and InterBase are left for another time.)
480 PH/21 Added message_body_newlines option.
482 PH/22 Guard against possible overflow in moan_check_errorcopy().
484 PH/23 POSIX allows open() to be a macro; guard against that.
486 PH/24 If the recipient of an error message contained an @ in the local part
487 (suitably quoted, of course), incorrect values were put in $domain and
488 $local_part during the evaluation of errors_copy.
491 Exim version 4.67
492 -----------------
494 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
495 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
496 Jan Srzednicki.
498 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
499 issue a MAIL command.
501 PH/02 In an ACL statement such as
503 deny dnslists = X!= : X=
505 if a client was not listed at all, or was listed with a value other than
506, in the X list, but was listed with in the Y list,
507 the condition was not true (as it should be), so access was not denied.
508 The bug was that the ! inversion was incorrectly passed on to the second
509 item. This has been fixed.
511 PH/03 Added additional dnslists conditions == and =& which are different from
512 = and & when the dns lookup returns more than one IP address.
514 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
515 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
517 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
518 FSYNC, which compiles an option called disable_fsync that allows for
519 bypassing fsync(). The documentation is heavily laced with warnings.
521 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
523 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
524 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
525 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
526 including adding "make clean"; (3) Added -fPIC when compiling the test
527 dynamically loaded module, to get rid of a warning.
529 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
530 message fails, move_frozen_messages = true and ignore_bounce_errors_after
531 = 0s. The bug is otherwise harmless.
533 PH/07 There was a bug in the dovecot authenticator such that the value of
534 $auth1 could be overwritten, and so not correctly preserved, after a
535 successful authentication. This usually meant that the value preserved by
536 the server_setid option was incorrect.
538 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
540 PH/09 Installed PCRE release 7.0.
542 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
543 run for batched SMTP input. It is now run at the start of every message
544 in the batch. While fixing this I discovered that the process information
545 (output by running exiwhat) was not always getting set for -bs and -bS
546 input. This is fixed, and it now also says "batched" for BSMTP.
548 PH/11 Added control=no_pipelining.
550 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
551 patch, slightly modified), and move the expansion of helo_data till after
552 the connection is made in the smtp transport (so it can use these
553 values).
555 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
557 PH/14 Added log_selector = +pid.
559 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
561 PH/16 Add ${if forany and ${if forall.
563 PH/17 Added dsn_from option to vary the From: line in DSNs.
565 PH/18 Flush SMTP output before performing a callout, unless control =
566 no_callout_flush is set.
568 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
569 was true (the default) a successful delivery failed to delete the retry
570 item, thus causing premature timeout of the address. The bug is now
571 fixed.
573 PH/20 Added hosts_avoid_pipelining to the smtp transport.
575 PH/21 Long custom messages for fakedefer and fakereject are now split up
576 into multiline reponses in the same way that messages for "deny" and
577 other ACL rejections are.
579 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
580 with slight modification.
582 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
583 draft, changing the syntax and factoring some duplicate code".
585 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
586 for deliveries of the second and subsequent messages over the same SMTP
587 connection.
589 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
590 ${reduce, with only minor "tidies".
592 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
594 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
595 expansion side effects.
597 PH/27 When a message times out after an over-quota error from an Exim-imposed
598 quota, the bounce message says "mailbox is full". This message was not
599 being given when it was a system quota that was exceeded. It now should
600 be the same.
602 MH/03 Made $recipients available in local_scan(). local_scan() already has
603 better access to the recipient list through recipients_list[], but
604 $recipients can be useful in postmaster-provided expansion strings.
606 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
607 in the case of a MAIL command with additional options following the
608 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
609 were accidentally chopped off.
611 PH/29 SMTP synchronization checks are implemented when a command is read -
612 there is a check that no more input is waiting when there shouldn't be
613 any. However, for some commands, a delay in an ACL can mean that it is
614 some time before the response is written. In this time, more input might
615 arrive, invalidly. So now there are extra checks after an ACL has run for
616 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
617 pipelining has not been advertised.
619 PH/30 MH's patch to allow iscntrl() characters to be list separators.
621 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
622 returned in the SMTP response when smtp_return_error_details was false.
623 This has been fixed.
625 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
626 instead of the C I/O that was originally supplied, because problems were
627 reported on Solaris.
629 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
630 Exim which did not show up earlier: it was assuming that a call to
631 SSL_CTX_set_info_callback() might give an error value. In fact, there is
632 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
633 was a macro that became an assignment, so it seemed to work. This has
634 changed to a proper function call with a void return, hence the compile
635 error. Exim's code has been fixed.
637 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
638 cpus.
640 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
642 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
644 PH/37 If a message is not accepted after it has had an id assigned (e.g.
645 because it turns out to be too big or there is a timeout) there is no
646 "Completed" line in the log. When some messages of this type were
647 selected by exigrep, they were listed as "not completed". Others were
648 picked up by some special patterns. I have improved the selection
649 criteria to be more general.
651 PH/38 The host_find_failed option in the manualroute router can now be set
652 to "ignore", to completely ignore a host whose IP address cannot be
653 found. If all hosts are ignored, the behaviour is controlled by the new
654 host_all_ignored option.
656 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
657 homing or because of multiple MX records with /mx) generated more than
658 one IP address, and the following item turned out to be the local host,
659 all the secondary addresses of the first item were incorrectly removed
660 from the list, along with the local host and any following hosts (which
661 is what is supposed to happen).
663 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
664 whoever called Exim into the -H file. In the case of the daemon it was
665 behaving confusingly. When first started, it used values for whoever
666 started the daemon, but after a SIGHUP it used the Exim user (because it
667 calls itself on a restart). I have changed the code so that it now always
668 uses the Exim user.
670 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
671 message are rejected with the same error (e.g. no authentication or bad
672 sender address), and a DATA command is nevertheless sent (as can happen
673 with PIPELINING or a stupid MUA), the error message that was given to the
674 RCPT commands is included in the rejection of the DATA command. This is
675 intended to be helpful for MUAs that show only the final error to their
676 users.
678 PH/42 Another patch from the Sieve maintainer.
680 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
681 Eximstats - Fixed some broken HTML links and added missing column headers
682 (Jez Hancock).
683 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
684 columns for Rejects, Temp Rejects, Ham, and Spam rows.
686 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
688 PH/43 Yet another patch from the Sieve maintainer.
690 PH/44 I found a way to check for a TCP/IP connection going away before sending
691 the response to the final '.' that terminates a message, but only in the
692 case where the client has not sent further data following the '.'
693 (unfortunately, this is allowed). However, in many cases there won't be
694 any further data because there won't be any more messages to send. A call
695 to select() can be used: if it shows that the input is "ready", there is
696 either input waiting, or the socket has been closed. An attempt to read
697 the next input character can distinguish the two cases. Previously, Exim
698 would have sent an OK response which the client would never have see.
699 This could lead to message repetition. This fix should cure that, at
700 least in a lot of common cases.
702 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
703 advertised in response to EHLO.
706 Exim version 4.66
707 -----------------
709 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
710 fixed by 4.65/MH/01 (is this a record?) are fixed:
712 (i) An empty string was always treated as zero by the numeric comparison
713 operators. This behaviour has been restored.
715 (ii) It is documented that the numeric comparison operators always treat
716 their arguments as decimal numbers. This was broken in that numbers
717 starting with 0 were being interpreted as octal.
719 While fixing these problems I realized that there was another issue that
720 hadn't been noticed. Values of message_size_limit (both the global option
721 and the transport option) were treated as octal if they started with 0.
722 The documentation was vague. These values are now always treated as
723 decimal, and I will make that clear in the documentation.
726 Exim version 4.65
727 -----------------
729 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
730 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
731 versions. (#438)
733 MH/01 Don't check that the operands of numeric comparison operators are
734 integers when their expansion is in "skipping" mode (fixes bug
735 introduced by 4.64-PH/07).
737 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
738 child addresses, Exim now panics and dies. Previously, because the count
739 is held in a short int, deliveries were likely to be lost. As such a
740 large number of recipients for a single message is ridiculous
741 (performance will be very, very poor), I have chosen to impose a limit
742 rather than extend the field.
745 Exim version 4.64
746 -----------------
748 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
749 leftover -K file (the existence of which was triggered by #402).
750 While we were at it, introduced process PID as part of the -K
751 filename. This should rule out race conditions when creating
752 these files.
754 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
755 processing considerably. Previous code took too long for large mails,
756 triggering a timeout which in turn triggers #401.
758 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
759 in the DK code in transports.c. sendfile() is not really portable,
760 hence the _LINUX specificness.
762 TF/01 In the add_headers option to the mail command in an Exim filter,
763 there was a bug that Exim would claim a syntax error in any
764 header after the first one which had an odd number of characters
765 in the field name.
767 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
768 callout verification, Exim cached a "reject" for the entire domain. This
769 is correct for most verifications, but it is not correct for a recipient
770 verification with use_sender or use_postmaster set, because in that case
771 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
772 case of MAIL FROM:<> rejection from other early rejections (e.g.
773 rejection of HELO). When verifying a recipient using a non-null MAIL
774 address, the cache is ignored if it shows MAIL FROM:<> rejection.
775 Whatever the result of the callout, the value of the domain cache is
776 left unchanged (for any other kind of callout, getting as far as trying
777 RCPT means that the domain itself is ok).
779 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
780 gcc 4.1.1 threw up.
782 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
783 manifest itself as EPIPE rather than ECONNECT. When tidying away a
784 session, the daemon ignores ECONNECT errors and logs others; it now
785 ignores EPIPE as well.
787 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
788 (quoted-printable decoding).
790 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
791 later the small subsequent patch to fix an introduced bug.
793 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
795 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
797 PH/08 An error is now given if message_size_limit is specified negative.
799 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
800 to be given (somewhat) arbitrary names.
802 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
803 in 4.64-PH/09.
805 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
806 miscellaneous code fixes
808 PH/10 Added the log_reject_target ACL modifier to specify where to log
809 rejections.
811 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
812 hostname. This is wrong, because it relates to the incoming message (and
813 probably the interface on which it is arriving) and not to the outgoing
814 callout (which could be using a different interface). This has been
815 changed to use the value of the helo_data option from the smtp transport
816 instead - this is what is used when a message is actually being sent. If
817 there is no remote transport (possible with a router that sets up host
818 addresses), $smtp_active_hostname is used.
820 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
821 tweaks were necessary in order to get it to work (see also 21 below):
822 (a) The code assumed that strncpy() returns a negative number on buffer
823 overflow, which isn't the case. Replaced with Exim's string_format()
824 function.
825 (b) There were several signed/unsigned issues. I just did the minimum
826 hacking in of casts. There is scope for a larger refactoring.
827 (c) The code used strcasecmp() which is not a standard C function.
828 Replaced with Exim's strcmpic() function.
829 (d) The code set only $1; it now sets $auth1 as well.
830 (e) A simple test gave the error "authentication client didn't specify
831 service in request". It would seem that Dovecot has changed its
832 interface. Fortunately there's a specification; I followed it and
833 changed what the client sends and it appears to be working now.
835 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
836 decoding.
838 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
839 address A is aliased to B and C, where B exists and C does not. Without
840 -v the output is "A verified" because verification stops after a
841 successful redirection if more than one address is generated. However,
842 with -v the child addresses are also verified. Exim was outputting "A
843 failed to verify" and then showing the successful verification for C,
844 with its parentage. It now outputs "B failed to verify", showing B's
845 parentage before showing the successful verification of C.
847 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
848 look up a TXT record in a specific list after matching in a combined
849 list.
851 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
852 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
853 they consult the DNS. I had assumed they would set it the way they
854 wanted; and indeed my experiments on Linux seem to show that in some
855 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
856 To be on the safe side, however, I have now made the interface to
857 host_find_byname() similar to host_find_bydns(), with an argument
858 containing the DNS resolver options. The host_find_byname() function now
859 sets these options at its start, just as host_find_bydns() does. The smtp
860 transport options dns_qualify_single and dns_search_parents are passed to
861 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
862 of host_find_byname() use the default settings of RES_DEFNAMES
863 (qualify_single) but not RES_DNSRCH (search_parents).
865 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
866 spool_read_header() do less string testing, by means of a preliminary
867 switch on the second character of optional "-foo" lines. (This is
868 overdue, caused by the large number of possibilities that now exist.
869 Originally there were few.) While I was there, I also converted the
870 str(n)cmp tests so they don't re-test the leading "-" and the first
871 character, in the hope this might squeeze out yet more improvement.
873 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
874 flag allowing group syntax was set by the header_syntax check but not
875 turned off, possible causing trouble later; (2) The flag was not being
876 set at all for the header_verify test, causing "group"-style headers to
877 be rejected. I have now set it in this case, and also caused header_
878 verify to ignore an empty address taken from a group. While doing this, I
879 came across some other cases where the code for allowing group syntax
880 while scanning a header line wasn't quite right (mostly, not resetting
881 the flag correctly in the right place). These bugs could have caused
882 trouble for malformed header lines. I hope it is now all correct.
884 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
885 with the "reply" argument non-NULL. The code, however (which originally
886 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
887 but it didn't always do it. This confused somebody who was copying the
888 code for some other use. I have removed all the tests.
890 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
891 feature that was used to support insecure browsers during the U.S. crypto
892 embargo. It requires special client support, and Exim is probably the
893 only MTA that supported it -- and would never use it because real RSA is
894 always available. This code has been removed, because it had the bad
895 effect of slowing Exim down by computing (never used) parameters for the
896 RSA_EXPORT functionality.
898 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
899 authenticator to fail if there's a tab character in the incoming data
900 (there should never be unless someone is messing about, as it's supposed
901 to be base64-encoded). Also added, on Timo's advice, the "secured" option
902 if the connection is using TLS or if the remote IP is the same as the
903 local IP, and the "valid-client-cert option" if a client certificate has
904 been verified.
906 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
907 authenticators. This can be used for authorization after authentication
908 succeeds. (In the case of plaintext, it servers for both authentication
909 and authorization.)
911 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
912 if any retry times were supplied.
914 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
915 connection, where there is no client IP address to check. In this
916 situation, the verify now always succeeds.
918 PH/25 Applied John Jetmore's -Mset patch.
920 PH/26 Added -bem to be like -Mset, but loading a message from a file.
922 PH/27 In a string expansion for a processed (not raw) header when multiple
923 headers of the same name were present, leading whitespace was being
924 removed from all of them, but trailing whitespace was being removed only
925 from the last one. Now trailing whitespace is removed from each header
926 before concatenation. Completely empty headers in a concatenation (as
927 before) are ignored.
929 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
930 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
932 PH/29 [Removed. This was a change that I later backed out, and forgot to
933 correct the ChangeLog entry (that I had efficiently created) before
934 committing the later change.]
936 PH/30 Exim was sometimes attempting to deliver messages that had suffered
937 address errors (4xx response to RCPT) over the same connection as other
938 messages routed to the same hosts. Such deliveries are always "forced",
939 so retry times are not inspected. This resulted in far too many retries
940 for the affected addresses. The effect occurred only when there were more
941 hosts than the hosts_max_try setting in the smtp transport when it had
942 the 4xx errors. Those hosts that it had tried were not added to the list
943 of hosts for which the message was waiting, so if all were tried, there
944 was no problem. Two fixes have been applied:
946 (i) If there are any address or message errors in an SMTP delivery, none
947 of the hosts (tried or untried) are now added to the list of hosts
948 for which the message is waiting, so the message should not be a
949 candidate for sending over the same connection that was used for a
950 successful delivery of some other message. This seems entirely
951 reasonable: after all the message is NOT "waiting for some host".
952 This is so "obvious" that I'm not sure why it wasn't done
953 previously. Hope I haven't missed anything, but it can't do any
954 harm, as the worst effect is to miss an optimization.
956 (ii) If, despite (i), such a delivery is accidentally attempted, the
957 routing retry time is respected, so at least it doesn't keep
958 hammering the server.
960 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
961 in ${readsocket because some servers need this prod.
963 PH/32 Added some extra debug output when updating a wait-xxx database.
965 PH/33 The hint "could be header name not terminated by colon", which has been
966 given for certain expansion errors for a long time, was not being given
967 for the ${if def:h_colon_omitted{... case.
969 PH/34 The spec says: "With one important exception, whenever a domain list is
970 being scanned, $domain contains the subject domain." There was at least
971 one case where this was not true.
973 PH/35 The error "getsockname() failed: connection reset by peer" was being
974 written to the panic log as well as the main log, but it isn't really
975 panic-worthy as it just means the connection died rather early on. I have
976 removed the panic log writing for the ECONNRESET error when getsockname()
977 fails.
979 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
980 runs only) independently of the message's sender address. This meant
981 that, if the 4xx error was in fact related to the sender, a different
982 message to the same recipient with a different sender could confuse
983 things. In particualar, this can happen when sending to a greylisting
984 server, but other circumstances could also provoke similar problems.
985 I have changed the default so that the retry time for these errors is now
986 based a combination of the sender and recipient addresses. This change
987 can be overridden by setting address_retry_include_sender=false in the
988 smtp transport.
990 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
991 remote server are returned as part of bounce messages. This was not
992 happening for LMTP over a pipe (the lmtp transport), but now it is the
993 same for both kinds of LMTP.
995 PH/38 Despite being documented as not happening, Exim was rewriting addresses
996 in header lines that were in fact CNAMEs. This is no longer the case.
998 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
999 and queue runs started by the daemon processed all messages. This has
1000 been fixed so that -R and -S can now usefully be given with -q<time>.
1002 PH/40 Import PCRE release 6.7 (fixes some bugs).
1004 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1006 PH/42 Give an error if -q is specified more than once.
1008 PH/43 Renamed the variables $interface_address and $interface_port as
1009 $received_ip_address and $received_port, to make it clear that these
1010 values apply to message reception, and not to the outgoing interface when
1011 a message is delivered. (The old names remain recognized, of course.)
1013 PH/44 There was no timeout on the connect() call when using a Unix domain
1014 socket in the ${readsocket expansion. There now is.
1016 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1017 be meaningful with "accept".
1019 SC/01 Eximstats V1.43
1020 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1022 SC/02 Eximstats V1.44
1023 Use a glob alias rather than an array ref in the generated
1024 parser. This improves both readability and performance.
1026 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1027 Collect SpamAssassin and rejection statistics.
1028 Don't display local sender or destination tables unless
1029 there is data to show.
1030 Added average volumes into the top table text output.
1032 SC/04 Eximstats V1.46
1033 Collect data on the number of addresses (recipients)
1034 as well as the number of messages.
1036 SC/05 Eximstats V1.47
1037 Added 'Message too big' to the list of mail rejection
1038 reasons (thanks to Marco Gaiarin).
1040 SC/06 Eximstats V1.48
1041 Mainlog lines which have GMT offsets and are too short to
1042 have a flag are now skipped.
1044 SC/07 Eximstats V1.49 (Alain Williams)
1045 Added the -emptyok flag.
1047 SC/08 Eximstats V1.50
1048 Fixes for obtaining the IP address from reject messages.
1050 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1051 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1052 whitesspace changes from 4.64-PH/27
1054 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1055 match 4.64-PH/13
1057 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1058 are found, allow negative numbers in numeric criteria)
1060 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1062 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1063 to match changes made in 4.64-PH/43
1065 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1067 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1068 "domain" is actually an IP address, and force a failure. This locks out
1069 those revolvers/nameservers that support "A-for-A" lookups, in
1070 contravention of the specifications.
1072 PH/48 When a host name was looked up from an IP address, and the subsequent
1073 forward lookup of the name timed out, the host name was left in
1074 $sender_host_name, contrary to the specification.
1076 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1077 restricted to single-key lookups, Exim was not diagnosing an error if
1078 * or *@ was used with a query-style lookup.
1080 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1082 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1083 long ago, but noone interested enough thought of it. Let's just say that
1084 the "1.1" means that there are some new functions that weren't there at
1085 some point in the past.
1087 PH/51 Error processing for expansion failure of helo_data from an smtp
1088 transport during callout processing was broken.
1090 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1091 tested/used via the -bh/-bhc/-bs options.
1093 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1094 bug, fixed in subsequent PCRE releases).
1096 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1097 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1099 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1102 Exim version 4.63
1103 -----------------
1105 SC/01 Use a glob alias rather than an array ref in eximstats generated
1106 parser. This improves both readability and performance.
1108 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1109 Don't display local sender or destination tables in eximstats unless
1110 there is data to show.
1111 Added average volumes into the eximstats top table text output.
1113 SC/03 Collect data on the number of addresses (recipients) as well
1114 as the number of messages in eximstats.
1116 TF/01 Correct an error in the documentation for the redirect router. Exim
1117 does (usually) call initgroups() when daemonizing.
1119 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1120 with consistent privilege compared to when running as a daemon.
1122 TF/03 Note in the spec that $authenticated_id is not set for local
1123 submissions from trusted users.
1125 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1126 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1128 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1129 by adding some example configuration directives to the default
1130 configuration file. A little bit of work is required to uncomment the
1131 directives and define how usernames and passwords are checked, but
1132 there is now a framework to start from.
1134 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1135 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1136 without this. I don't know how relevant this is to other LDAP libraries.
1138 PH/02 Add the verb name to the "unknown ACL verb" error.
1140 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1142 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1144 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1145 directory not expanded when it should be if an expanded home directory
1146 was set for the address (which is overridden by the transport).
1148 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1149 libradius.
1151 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1152 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1153 because it is too late at that time, and has no effect.
1155 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1156 security issue with \' (bugzilla #107). I could not use the
1157 PQescapeStringConn() function, because it needs a PGconn value as one of
1158 its arguments.
1160 PH/08 When testing addresses using -bt, indicate those final addresses that
1161 are duplicates that would not cause an additional delivery. At least one
1162 person was confused, thinking that -bt output corresponded to deliveries.
1163 (Suppressing duplicates isn't a good idea as you lose the information
1164 about possibly different redirections that led to the duplicates.)
1166 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1167 systems where poll() doesn't work, in particular OS X.
1169 PH/10 Added more information to debugging output for retry time not reached.
1171 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1172 operations in malware.c.
1174 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1175 signatures.
1177 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1178 syslog_duplication set false, log lines that would normally be written
1179 both the the main log and to the reject log were not written to syslog at
1180 all.
1182 PH/14 In the default configuration, change the use of "message" in ACL warn
1183 statements to "add_header".
1185 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1186 not followed by a command (e.g. "seen endif").
1188 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1189 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1190 latter.
1192 PH/17 Added extra conditions to the default value of delay_warning_condition
1193 so that it is now:
1195 ${if or { \
1196 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1197 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1198 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1199 }{no}{yes}}
1201 The Auto-Submitted: and various List- headers are standardised, whereas I
1202 don't think Precedence: ever was.
1204 PH/18 Refactored debugging code in route_finduser() to show more information,
1205 in particular, the error code if getpwnam() issues one.
1207 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1208 This is apparently needed in addition to the PH/07 change above to avoid
1209 any possible encoding problems.
1211 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1212 but not after initializing Perl.
1214 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1215 output them only if debugging. By default they are written stderr,
1216 apparently, which is not desirable.
1218 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1219 queries.
1221 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1222 --not options
1224 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1226 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1227 authenticated or an ident call has been made. Suppress the default
1228 values for $authenticated_id and $authenticated_sender (but permit -oMai
1229 and -oMas) when testing with -bh.
1231 PH/24 Re-jigged the order of the tests in the default configuration so that the
1232 tests for valid domains and recipients precede the DNS black list and CSA
1233 tests, on the grounds that those ones are more expensive.
1235 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1236 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1237 This bug exists in every version of Exim that I still have, right back to
1238 0.12.
1240 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1241 However, an attempt to turn on case-sensitivity in a regex key by
1242 including (?-i) didn't work because the subject string was already
1243 lowercased, and the effects were non-intuitive. It turns out that a
1244 one-line patch can be used to allow (?-i) to work as expected.
1247 Exim version 4.62
1248 -----------------
1250 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1251 other effects) broke the use of negated acl sub-conditions.
1253 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1254 patch).
1256 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1257 "Deny" causes Exim to reject the incoming connection with a 554 error.
1258 Unfortunately, if there is a major crisis, such as a disk failure,
1259 tcp-wrappers gives "deny", whereas what one would like would be some
1260 kind of temporary error. A kludge has been added to help with this.
1261 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1262 554 error is used if errno is still zero or contains ENOENT (which occurs
1263 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1264 451 error is used.
1266 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1268 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1269 errors. Otherwise a message that provokes a temporary error (when other
1270 messages do not) can cause a whole host to time out.
1272 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1273 addresses were routed directly to files or pipes from a redirect router.
1274 File deliveries just didn't batch; pipe deliveries might have suffered
1275 odd errors.
1277 PH/06 A failure to get a lock for a hints database would erroneously always say
1278 "Failed to get write lock", even when it was really a read lock.
1280 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1281 of 0600. This has been changed to use the value of the lockfile_mode
1282 option (which defaults to 0600).
1284 PH/08 Applied small patch from the Sieve maintainer.
1286 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1287 folder from quota calculations, a direct delivery into this folder messed
1288 up the contents of the maildirsize file. This was because the regex was
1289 used only to exclude .Trash (or whatever) when the size of the mailbox
1290 was calculated. There was no check that a delivery was happening into an
1291 excluded directory. This bug has been fixed by ignoring all quota
1292 processing for deliveries into excluded directories.
1294 PH/10 Added the maildirfolder_create_regex option to appendfile.
1297 Exim version 4.61
1298 -----------------
1300 PH/01 The code for finding all the local interface addresses on a FreeBSD
1301 system running IPv6 was broken. This may well have applied to all BSD
1302 systems, as well as to others that have similar system calls. The broken
1303 code found IPv4 interfaces correctly, but gave incorrect values for the
1304 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1305 that it would not match correctly against @[] and not recognize the IPv6
1306 addresses as local.
1308 PH/02 The ipliteral router was not recognizing addresses of the form user@
1309 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1311 PH/03 Added disable_ipv6.
1313 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1314 decoded form, because it is most often used to construct To: headers
1315 lines in autoreplies, and the decoded form may well be syntactically
1316 invalid. However, $reply_address has leading white space removed, and all
1317 newlines turned into spaces so that the autoreply transport does not
1318 grumble.
1320 PH/05 If group was specified without a user on a router, and no group or user
1321 was specified on a transport, the group from the router was ignored.
1323 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1324 for visible compile-time settings that can be used to change these
1325 numbers, for those that want even more. Backwards compatibility with old
1326 spool files has been maintained. However, going back to a previous Exim
1327 release will lost any variables that are in spool files.
1329 PH/07 Two small changes when running in the test harness: increase delay when
1330 passing a TCP/IP connection to a new process, in case the original
1331 process has to generate a bounce, and remove special handling of
1332 (sic), which is no longer necessary.
1334 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1335 be the same on different OS.
1337 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1338 testing.
1340 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1341 whether --show-vars was specified or not
1343 JJ/02 exipick: Added support for new ACL variable spool format introduced
1344 in 4.61-PH/06
1346 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1347 syntactically invalid From: or Reply-to: line, and a filter used this to
1348 generate an autoreply, and therefore failed to obtain an address for the
1349 autoreply, Exim could try to deliver to a non-existent relative file
1350 name, causing unrelated and misleading errors. What now happens is that
1351 it logs this as a hard delivery error, but does not attempt to create a
1352 bounce message.
1354 PH/11 The exinext utility has a -C option for testing purposes, but although
1355 the given file was scanned by exinext itself; it wasn't being passed on
1356 when Exim was called.
1358 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1359 an end-of-file indication when reading a command response.
1361 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1362 compiled. In many other places in Exim, IPv6 addresses are always
1363 recognized, so I have changed this. It also means that IPv4 domain
1364 literals of the form [IPV4:n.n.n.n] are now always recognized.
1366 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1367 used if the router is not running as root, for example, when verifying at
1368 ACL time, or when using -bh. The debugging output from this situation was
1369 non-existent - all you got was a failure to exec. I have made two
1370 changes:
1372 (a) Failures to set uid/gid, the current directory, or a process leader
1373 in a subprocess such as that created by queryprogram now generate
1374 suitable debugging ouput when -d is set.
1376 (b) The queryprogram router detects when it is not running as root,
1377 outputs suitable debugging information if -d is set, and then runs
1378 the subprocess without attempting to change uid/gid.
1380 PH/15 Minor change to Makefile for building test_host (undocumented testing
1381 feature).
1383 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1384 additional section of a DNS packet that returns MX or SRV records.
1385 Instead, it always explicitly searches for A/AAAA records. This avoids
1386 major problems that occur when a DNS server includes only records of one
1387 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1388 fixed another bug: if SRV records were looked up and the corresponding
1389 address records were *not* found in the additional section, the port
1390 values from the SRV records were lost.
1392 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1393 using the correct key (the original address) when searching the retry
1394 rules in order to find which one to use for generating the retry hint.
1396 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1397 adding the default one. Similarly, if it contains a Reply-To: header, the
1398 errors_reply_to option, if set, is not used.
1400 PH/19 When calculating a retry time, Exim used to measure the "time since
1401 failure" by looking at the "first failed" field in the retry record. Now
1402 it does not use this if it is later than than the arrival time of the
1403 message. Instead it uses the arrival time. This makes for better
1404 behaviour in cases where some deliveries succeed, thus re-setting the
1405 "first failed" field. An example is a quota failure for a huge message
1406 when small messages continue to be delivered. Without this change, the
1407 "time since failure" will always be short, possible causing more frequent
1408 delivery attempts for the huge message than are intended.
1409 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1411 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1412 $1, $2, $3) because the numerical variables can be reset during some
1413 expansion items (e.g. "match"), thereby losing the authentication data.
1415 PH/21 Make -bV show the size of off_t variables so that the test suite can
1416 decide whether to run tests for quotas > 2G.
1418 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1419 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1420 filecount value is greater than 2G or if a quota value is greater than 2G
1421 on a system where the size of off_t is not greater than 4, a panic error
1422 is given.
1424 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1425 never match. The debug and -bh output now contains an explicit error
1426 message indicating a malformed IPv4 address or mask.
1428 PH/24 An host item such as was being treated as the IP address
1429 without a mask. Now it is not recognized as an IP address, and
1430 PH/23 above applies.
1432 PH/25 Do not write to syslog when running in the test harness. The only
1433 occasion when this arises is a failure to open the main or panic logs
1434 (for which there is an explicit test).
1436 PH/26 Added the /no_tell option to "control=freeze".
1438 PH/27 If a host name lookup failed very early in a connection, for example, if
1439 the IP address matched host_lookup and the reverse lookup yielded a name
1440 that did not have a forward lookup, an error message of the form "no IP
1441 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1442 could be logged. Now it outputs the IP address instead of "NULL".
1444 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1445 allows the sender and the authenticated sender to be set when
1446 submitting a message from within Exim. Since child_open_exim() is
1447 documented for local_scan(), the new function should be too.
1449 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1450 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1451 results in an empty string is now treated as unset.
1453 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1455 PH/31 Added sender_verify_fail logging option.
1457 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1458 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1459 tidied the source and removed it altogether.
1461 PH/33 When a queue run was abandoned because the load average was too high, a
1462 log line was always written; now it is written only if the queue_run log
1463 selector is set. In addition, the log line for abandonment now contains
1464 information about the queue run such as the pid. This is always present
1465 in "start" and "stop" lines but was omitted from the "abandon" line.
1467 PH/34 Omit spaces between a header name and the colon in the error message that
1468 is given when verify = headers_syntax fails (if there are lots of them,
1469 the message gets confusing).
1471 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1472 names, as there are now some PTR records that contain slashes. This check
1473 is only to protect against broken name servers that fall over on strange
1474 characters, so the fact that it applies to all lookups doesn't matter.
1476 PH/36 Now that the new test suite is complete, we can remove some of the
1477 special code in Exim that was needed for the old test suite. For example,
1478 sorting DNS records because real resolvers return them in an arbitrary
1479 order. The new test suite's fake resolver always returns records in the
1480 same order.
1482 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1483 bounces) except when queue_only is set, to avoid logging races between
1484 the different processes.
1486 PH/38 Panic-die if .include specifies a non-absolute path.
1488 PH/39 A tweak to the "H" retry rule from its user.
1490 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1491 a label. They prevented compilation on older perls.
1493 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1494 a warning to be raised on newish perls.
1496 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1497 on queue. Changes to match documented behaviour of showing count of
1498 messages matching specified criteria.
1500 PH/40 Changed the default ident timeout from 30s to 5s.
1502 PH/41 Added support for the use of login_cap features, on those BSD systems
1503 that have them, for controlling the resources used by pipe deliveries.
1505 PH/42 The content-scanning code uses fopen() to create files in which to put
1506 message data. Previously it was not paying any attention to the mode of
1507 the files. Exim runs with umask(0) because the rest of the code creates
1508 files with open(), and sets the required mode explicitly. Thus, these
1509 files were ending up world-writeable. This was not a big issue, because,
1510 being within the spool directory, they were not world-accessible. I have
1511 created a function called modefopen, which takes an additional mode
1512 argument. It sets umask(777), creates the file, chmods it to the required
1513 mode, then resets the umask. All the relevant calls to fopen() in the
1514 content scanning code have been changed to use this function.
1516 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1517 to 24 hours. This avoids potential overflow problems when processing G
1518 and H retry rules. I suspect nobody ever tinkers with this value.
1520 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1522 PH/45 When the plaintext authenticator is running as a client, the server's
1523 challenges are checked to ensure they are valid base64 strings. By
1524 default, the authentication attempt is cancelled if an invalid string is
1525 received. Setting client_ignore_invalid_base64 true ignores these errors.
1526 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1527 they are received. Thus, the responses can be made to depend on the
1528 challenges. If an invalid string is ignored, an empty string is placed in
1529 the variable.
1531 PH/46 Messages that are created by the autoreply transport now contains a
1532 References: header, in accordance with RFCs 2822 and 3834.
1534 PH/47 Added authenticated_sender_force to the smtp transport.
1536 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1538 PH/49 Installed latest patch from the Sieve maintainer.
1540 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1541 was also set, the appendfile transport was unnecessarily scanning a
1542 directory of message files (e.g. for maildir delivery) to find the count
1543 of files (along with the size), even though it did not need this
1544 information. It now does the scan only if it needs to find either the
1545 size of the count of files.
1547 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1549 PH/52 Two bugs concerned with error handling when the smtp transport is
1550 used in LMTP mode:
1552 (i) Exim was not creating retry information for temporary errors given
1553 for individual recipients after the DATA command when the smtp transport
1554 was used in LMTP mode. This meant that they could be retried too
1555 frequently, and not timed out correctly.
1557 (ii) Exim was setting the flag that allows error details to be returned
1558 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1559 recipients that were returned after the DATA command.
1561 PH/53 This is related to PH/52, but is more general: for any failing address,
1562 when detailed error information was permitted to be returned to the
1563 sender, but the error was temporary, then after the final timeout, only
1564 "retry timeout exceeded" was returned. Now it returns the full error as
1565 well as "retry timeout exceeded".
1567 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1568 do this, and (what is worse) MTAs that accept it.
1570 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1571 will now be deprecated.
1573 PH/56 New os.c-cygwin from the Cygwin maintainer.
1575 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1576 formats (previously only available in exim formats via -bpr, -bpru,
1577 and -bpra. Now also available in native and exiqgrep formats)
1579 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1580 with very large, slow to parse queues
1582 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1584 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1586 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1587 responses to authentication challenges, though it was showing the
1588 challenges; (ii) I've removed the CR characters from the debug output for
1589 SMTP output lines.
1591 PH/58 Allow for the insertion of a newline as well as a space when a string
1592 is turned into more than one encoded-word during RFC 2047 encoding. The
1593 Sieve code now uses this.
1595 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1596 data_4xx, lost_connection, tls_required.
1598 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1599 message was being sent as an SMTP response.
1601 PH/61 Add -l and -k options to exicyclog.
1603 PH/62 When verifying, if an address was redirected to one new address, so that
1604 verification continued, and the new address failed or deferred after
1605 having set something in $address_data, the value of $address_data was not
1606 passed back to the ACL. This was different to the case when no
1607 redirection occurred. The value is now passed back in both cases.
1609 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1610 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1611 use login_cap.h, so on its own it isn't the distinguishing feature. The
1612 new name refers directly to the setclassresources() function.
1614 PH/65 Added configuration files for NetBSD3.
1616 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1618 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1619 is preferred over IPv4.
1621 PH/68 The bounce_return_message and bounce_return_body options were not being
1622 honoured for bounces generated during the reception of non-SMTP messages.
1623 In particular, this applied to messages rejected by the ACL. This bug has
1624 been fixed. However, if bounce_return_message is true and bounce_return_
1625 body is false, the headers that are returned for a non-SMTP message
1626 include only those that have been read before the error was detected.
1627 (In the case of an ACL rejection, they have all been read.)
1629 PH/69 The HTML version of the specification is now built in a directory called
1630 spec_html instead of spec.html, because the latter looks like a path with
1631 a MIME-type, and this confuses some software.
1633 PH/70 Catch two compiler warnings in sieve.c.
1635 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1636 function verify_get_ident() calls ip_connect() to connect a socket, but
1637 if the "connect()" function timed out, ip_connect() used to close the
1638 socket. However, verify_get_ident() also closes the socket later, and in
1639 between Exim writes to the log, which may get opened at this point. When
1640 the socket was closed in ip_connect(), the log could get the same file
1641 descriptor number as the socket. This naturally causes chaos. The fix is
1642 not to close the socket in ip_connect(); the socket should be closed by
1643 the function that creates it. There was only one place in the code where
1644 this was missing, in the iplookup router, which I don't think anybody now
1645 uses, but I've fixed it anyway.
1647 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1648 well as to direct DNS lookups. Otherwise the handling of names in host
1649 lists is inconsistent and therefore confusing.
1652 Exim version 4.60
1653 -----------------
1655 PH/01 Two changes to the default runtime configuration:
1657 (1) Move the checks for relay_from_hosts and authenticated clients from
1658 after to before the (commented out) DNS black list checks.
1660 (2) Add control=submission to the relay_from_hosts and authenticated
1661 clients checks, on the grounds that messages accepted by these
1662 statements are most likely to be submissions.
1664 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1666 (1) Generate an error if the third argument for the ${prvs expansion is
1667 not a single digit.
1669 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1670 string.
1672 (3) Reset the variables that are obtained from the first argument of
1673 ${prvscheck and used in the second argument before leaving the code,
1674 because their memory is reclaimed, so using them afterwards may do
1675 silly things.
1677 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1678 one (it's much easier than Tom thought :-).
1680 (5) Because of (4), we can now allow for the use of $prvscheck_result
1681 inside the third argument.
1683 PH/03 For some reason, the default setting of PATH when running a command from
1684 a pipe transport was just "/usr/bin". I have changed it to
1685 "/bin:/usr/bin".
1688 anything to be listed in the output from -bV.
1690 PH/05 When a filter generated an autoreply, the entire To: header line was
1691 quoted in the delivery log line, like this:
1693 => >A.N.Other <ano@some.domain> <original@ddress> ...
1695 This has been changed so that it extracts the operative address. There
1696 may be more than one such address. If so, they are comma-separated, like
1697 this:
1699 => >ano@some.domain,ona@other.domain <original@ddress> ...
1701 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1702 command, (for example, EHLO []) and the client's IP address was
1703 not being looked up in the rDNS to get a host name, Exim was showing the
1704 IP address twice in Received: lines, even though the IP addresses were
1705 identical. For example:
1707 Received: from [] (helo=[])
1709 However, if the real host name was known, it was omitting the HELO data
1710 if it matched the actual IP address. This has been tidied up so that it
1711 doesn't show the same IP address twice.
1713 PH/07 When both +timestamp and +memory debugging was on, the value given by
1714 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1715 called by the debug printing, thereby overwriting the timestamp buffer.
1716 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1718 PH/08 When the original message was included in an autoreply transport, it
1719 always said "this is a copy of the message, including all the headers",
1720 even if body_only or headers_only was set. It now gives an appropriate
1721 message.
1723 PH/09 Applied a patch from the Sieve maintainer which:
1725 o fixes some comments
1726 o adds the (disabled) notify extension core
1727 o adds some debug output for the result of if/elsif tests
1728 o points to the current vacation draft in the documentation
1729 and documents the missing references header update
1731 and most important:
1733 o fixes a bug in processing the envelope test (when testing
1734 multiple envelope elements, the last element determinted the
1735 result)
1737 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1738 Electronic Mail") by including:
1740 Auto-submitted: auto-generated
1742 in the messages that it generates (bounce messages and others, such as
1743 warnings). In the case of bounce messages for non-SMTP mesages, there was
1744 also a typo: it was using "Auto_submitted" (underscore instead of
1745 hyphen). Since every message generated by Exim is necessarily in response
1746 to another message, thes have all been changed to:
1748 Auto-Submitted: auto-replied
1750 in accordance with these statements in the RFC:
1752 The auto-replied keyword:
1754 - SHOULD be used on messages sent in direct response to another
1755 message by an automatic process,
1757 - MUST NOT be used on manually-generated messages,
1759 - MAY be used on Delivery Status Notifications (DSNs) and Message
1760 Disposition Notifications (MDNs),
1762 - MUST NOT be used on messages generated by automatic or periodic
1763 processes, except for messages which are automatic responses to
1764 other messages.
1766 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1767 to the default Received: header definition.
1769 PH/12 Added log selector acl_warn_skipped (default on).
1771 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1772 variables because (a) they are in the wrong storage pool and (b) even if
1773 they were copied, it wouldn't work properly because of the caching.
1775 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1776 checking when decoding. Apparently there are clients that generate
1777 overlong encoded strings. Why am I not surprised?
1779 PH/15 If the first argument of "${if match_address" was not empty, but did not
1780 contain an "@" character, Exim crashed. Now it writes a panic log message
1781 and treats the condition as false.
1783 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1785 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1786 extension "envelope-auth". The code is finished and in agreement with
1787 other implementations, but there is no documentation so far and in fact,
1788 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1789 not changing the active code.
1791 Print executed "if" and "elsif" statements when debugging is used. This
1792 helps a great deal to understand what a filter does.
1794 Document more things not specified clearly in RFC3028. I had all this
1795 sorted out, when out of a sudden new issues came to my mind. Oops."
1797 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1798 (Bugzilla #53).
1800 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1801 canonical form (as documented). However, after a host name lookup from
1802 the IP address, check_host() was doing a simple string comparison with
1803 addresses acquired from the DNS when checking that the found name did
1804 have the original IP as one of its addresses. Since any found IPv6
1805 addresses are likely to be in abbreviated form, the comparison could
1806 fail. Luckily, there already exists a function for doing the comparison
1807 by converting both addresses to binary, so now that is used instead of
1808 the text comparison.
1810 PH/20 There was another similar case to PH/19, when a complete host name was
1811 given in a host list; looking up its IP address could give an abbreviated
1812 form, whereas the current host's name might or might not be abbreviated.
1813 The same fix has been applied.
1816 Exim version 4.54
1817 -----------------
1819 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1820 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1821 It now does.
1823 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1824 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1826 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1828 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1829 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1830 Also, for "Auto-Submitted", treat anything other than "no" as
1831 non-personal, in accordance with RFC 3834. (Previously it treated
1832 anything starting "auto-" as non-personal.)
1834 TF/01 The control=submission/name=... option had a problem with syntax
1835 errors if the name included a slash character. The /name= option
1836 now slurps the rest of the string, so it can include any characters
1837 but it must come last in the list of options (after /sender_retain
1838 or /domain=).
1840 PH/05 Some modifications to the interface to the fake nameserver for the new
1841 testing suite.
1845 Exim version 4.53
1846 -----------------
1848 TK/01 Added the "success_on_redirect" address verification option. See
1849 NewStuff for rationale and an example.
1851 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1853 PH/02 Patch to exigrep to allow it to work on syslog lines.
1855 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1856 fread() to skip over the body file's header line, because in Cygwin the
1857 header line is locked and is inaccessible.
1859 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1860 co-exist for some time) to make it clear that it is the Exim ID that is
1861 referenced, not the Message-ID: header line.
1863 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1864 string_format() function, because snprintf() does not exist on all
1865 operating systems.
1867 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1868 ${stat: expansion item.
1870 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1871 protocol synchronization error", to keep the pedants happy.
1873 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1874 well as for IRIX systems, when gcc is being used. See the host.c source
1875 file for comments.
1877 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1879 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1880 setting.
1882 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1883 transport and to the smtp transport in LMTP mode.
1885 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1887 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1888 run a filter in a subprocess. This could lead to confusion in subsequent
1889 lookups in the parent process. There should also be a search_tidyup() at
1890 the end of the subprocess.
1892 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1893 only if the host matched helo_try_verify_hosts, which caused the
1894 verification to occur when the EHLO/HELO command was issued. The ACL just
1895 tested the remembered result. Now, if a previous verification attempt has
1896 not happened, "verify = helo" does it there and then.
1898 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1900 TK/03 Fix log output including CR from clamd.
1902 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1903 exist provoked a memory error which could cause a segfault.
1905 PH/15 Installed PCRE 6.2
1907 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1909 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1910 of the problem. Specifically, suggested +O2 rather than +O1 for the
1911 HP-UX compiler.
1913 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1915 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1916 record, the port was not correctly logged when the outgoing_port log
1917 selector was set (it logged the transort's default port).
1919 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1920 fallback_hosts, and "hosts" in the smtp transport.
1922 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1923 host errors such as "Connection refused".
1925 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1926 authentication with radiusclient 0.4.9:
1928 - Error returned from rc_read_config was caught wrongly
1929 - Username/password not passed on to radius server due to wrong length.
1931 The presumption is that some radiusclient API changes for 4.51/PH/17
1932 were not taken care of correctly. The code is still untested by me (my
1933 Linux distribution still has 0.3.2 of radiusclient), but it was
1934 contributed by a Radius user.
1936 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1937 expanding the "port" option of the smtp transport.
1939 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1940 while reading a MIME header. Thanks to Tom Hughes for a patch.
1942 PH/24 Include config.h inside local_scan.h so that configuration settings are
1943 available.
1945 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1946 that in an ACL for RCPT (for example), you can examine exactly what was
1947 received.
1949 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1950 commands, but it was not correctly comparing the address with the actual
1951 client host address. Thus, it would show the EHLO address in Received:
1952 header lines when this was not necessary.
1954 PH/27 Added the % operator to ${eval:}.
1956 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1957 it should be ignoring failures (because with -C, for example, it has lost
1958 privilege). It wasn't ignoring creation failures other than "already
1959 exists".
1961 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1962 -bV or -d is used.
1964 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1965 because an input line was too long, either on its own, or by virtue of
1966 too many continuations, the temporary file was not being removed, and the
1967 return code was incorrect.
1969 PH/31 Missing "BOOL" in function definition in filtertest.c.
1971 PH/32 Applied Sieve patches from the maintainer.
1973 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1975 PH/33 Added "verify = not_blind".
1977 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1978 Local/Makefile (with some defaults set). These are used in built scripts
1979 such as exicyclog, but they have never been used in the exim_install
1980 script (though there are many overriding facilities there). I have
1981 arranged that the exim_install script now takes note of these two
1982 settings.
1984 PH/35 Installed configuration files for Dragonfly.
1986 PH/36 When a locally submitted message by a trusted user did not contain a
1987 From: header, and the sender address was obtained from -f or from an SMTP
1988 MAIL command, and the trusted user did not use -F to supply a sender
1989 name, $originator_name was incorrectly used when constructing a From:
1990 header. Furthermore, $originator_name was used for submission mode
1991 messages from external hosts without From: headers in a similar way,
1992 which is clearly wrong.
1994 PH/37 Added control=suppress_local_fixups.
1996 PH/38 When log_selector = +received_sender was set, and the addition of the
1997 sender made the log line's construction buffer exactly full, or one byte
1998 less than full, an overflow happened when the terminating "\n" was
1999 subsequently added.
2001 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2002 when the result of a list match is failure because a DNS lookup failed.
2004 PH/40 RM_COMMAND is now used in the building process.
2006 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2007 the "build-* directories that it finds.
2009 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2010 address in a domain literal was a prefix of an interface address.
2012 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2013 when verifying a sender address, unless rewrite_headers is false.
2015 PH/44 Wrote a long comment about why errors_to addresses are verified as
2016 recipients, not senders.
2018 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2019 the ratelimit ACL was added.
2021 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2023 PH/46 Added extra information about PostgreSQL errors to the error string.
2025 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2026 avoiding the need to install special zones in a real server. This is
2027 backwards compatible; if it can't find the fake resolver, it drops back.
2028 Thus, both old and new test suites can be run.
2030 TF/02 Added util/ratelimit.pl
2032 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2033 clock is set back in time.
2035 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2036 Candler <B.Candler@pobox.com>.
2038 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2039 OK for addresses that are the result of redirections.
2041 PH/48 A number of further additions for the benefit of the new test suite,
2042 including a fake gethostbyname() that interfaces to the fake DNS resolver
2043 (see PH/47 above).
2045 TF/06 The fix for widen_domains has also been applied to qualify_single and
2046 search_parents which are the other dnslookup options that can cause
2047 header rewrites.
2049 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2050 type ("H").
2052 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2054 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2055 service" if it encountered an MX record with an empty target hostname.
2056 The message is now "an MX or SRV record indicated no SMTP service".
2058 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2059 if the DNS of the sending site is misconfigured. This is quite a
2060 common situation. This change restores the behaviour of treating a
2061 helo verification defer as a failure.
2063 PH/51 If self=fail was set on a router, the bounce message did not include the
2064 actual error message.
2067 Exim version 4.52
2068 -----------------
2070 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2072 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2073 command itself ended in error, the underlying message about the transport
2074 filter timeout was being overwritten with the pipe command error. Now the
2075 underlying error message should be appended to the second error message.
2077 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2079 PH/02 Reduce the amount of output that "make" produces by default. Full output
2080 can still be requested.
2082 PH/03 The warning log line about a condition test deferring for a "warn" verb
2083 was being output only once per connection, rather than after each
2084 occurrence (because it was using the same function as for successful
2085 "warn" verbs). This seems wrong, so I have changed it.
2087 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2088 it should not have, which might have caused a crash in the right
2089 circumstances, but probably never did.
2091 PH/04 Installed a modified version of Tony Finch's patch to make submission
2092 mode fix the return path as well as the Sender: header line, and to
2093 add a /name= option so that you can make the user's friendly name appear
2094 in the header line.
2096 TF/03 Added the control = fakedefer ACL modifier.
2098 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2099 Mark Lowes for thorough testing.
2101 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2103 TK/03 Merged latest SRS patch from Miles Wilton.
2105 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2106 with the definition in sysexits.h (which is #included earlier).
2107 Fortunately, Exim does not actually use EX_OK. The code used to try to
2108 preserve the sysexits.h value, by assumimg that macro definitions were
2109 scanned for macro replacements. I have been disabused of this notion,
2110 so now the code just undefines EX_OK before #including unistd.h.
2112 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2113 in the smtp transport. When a block could not be written in a single
2114 write() function, the timeout was being re-applied to each part-write.
2115 This seems wrong - if the receiver was accepting one byte at a time it
2116 would take for ever. The timeout is now adjusted when this happens. It
2117 doesn't have to be particularly precise.
2119 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2120 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2122 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2123 without a domain if the check to <postmaster@domain> fails.
2125 SC/01 Eximstats: added -xls and the ability to specify output files
2126 (patch written by Frank Heydlauf).
2128 SC/02 Eximstats: use FileHandles for outputing results.
2130 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2132 SC/04 Eximstats: fixed display of large numbers with -nvr option
2134 SC/05 Eximstats: fixed merging of reports with empty tables.
2136 SC/06 Eximstats: added the -include_original_destination flag
2138 SC/07 Eximstats: removed tabs and trailing whitespace.
2140 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2142 TK/06 MBOX spool code: Add real "From " MBOX separator line
2143 so the .eml file is really in mbox format (even though
2144 most programs do not really care). Patch from Alex Miller.
2146 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2147 The latter is generated from $received_to and is only set if the
2148 message has one envelope recipient. SA can use these headers,
2149 obviously out-of-the-box. Patch from Alex Miller.
2151 PH/08 The ${def test on a variable was returning false if the variable's
2152 value was "0", contrary to what the specification has always said!
2153 The result should be true unless the variable is empty.
2155 PH/09 The syntax error of a character other than { following "${if
2156 def:variable_name" (after optional whitespace) was not being diagnosed.
2157 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2158 accidental colon was present, for example, could give incorrect results.
2160 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2161 result is used (not including appendfile, where other changes are about
2162 to be made).
2164 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2165 This involved changing a lot of size variables from int to off_t. It
2166 should work with maildirs and everything.
2168 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2169 spamd dying while we are connected to it.
2171 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2172 <jgh@wizmail.org>
2174 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2175 function for BDB 4.3.
2177 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2179 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2180 the sources for PCRE have been re-arranged and more files are now
2181 involved.
2183 PH/15 The code I had for printing potentially long long variables in PH/11
2184 above was not the best (it lost precision). The length of off_t variables
2185 is now inspected at build time, and an appropriate printing format (%ld
2186 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2187 to be "long long int" or "long int". This is needed for the internal
2188 formatting function string_vformat().
2190 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2191 the configuration file to be ":syslog", then the script "guesses" where
2192 the logs files are, rather than using the compiled in default. In our
2193 case the guess is not the same as the compiled default, so the script
2194 suddenly stopped working when I started to use syslog. The patch checks
2195 to see if log_file_path is "". If so, it attempts to read it from exim
2196 with no configuration file to get the compiled in version, before it
2197 falls back to the previous guessing code."
2199 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2200 implementing BATV in an Exim configuration. See NewStuff for the gory
2201 details.
2203 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2204 Makefile that are specific to HP-UX.
2206 PH/18 If the "use_postmaster" option was set for a recipient callout together
2207 with the "random" option, the postmaster address was used as the MAIL
2208 FROM address for the random test, but not for the subsequent recipient
2209 test. It is now used for both.
2211 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2212 patch removes a few documentation additions to RFC 3028, because the
2213 latest draft now contains them. It adds the new en;ascii-case comparator
2214 and a new error check for 8bit text in MIME parts. Comparator and
2215 require names are now matched exactly. I enabled the subaddress
2216 extension, but it is not well tested yet (read: it works for me)."
2218 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2219 rework some of the code of TK/09 above to avoid the hardwired use of
2220 "%lld" and "long long". Replaced the call to snprintf() with a call to
2221 string_vformat().
2223 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2224 records point to non-existent hosts", "retry timeout exceeded", and
2225 "retry time not reached for any host after a long failure period".
2227 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2228 experimental DomainKeys support:
2230 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2231 (2) On an error such as an illegally used "control", the wrong name for
2232 the control was given.
2234 These problems did NOT occur unless DomainKeys support was compiled.
2236 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2238 PH/24 Added ${if match_ip condition.
2240 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2241 databases so that it will be absolutely obvious if a crash occurs in the
2242 DB library. This is a regular occurrence (often caused by mis-matched
2243 db.h files).
2245 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2246 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2247 picked up on a user's system that detects such things. There doesn't seem
2248 to be a gcc warning option for this - only an attribute that has to be
2249 put on the function's prototype. It seems that in Fedora Core 4 they have
2250 set this on a number of new functions. No doubt there will be more in due
2251 course.
2253 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2254 specify a transport. However, if an address that was verified by such a
2255 router was the subject of a callout, Exim crashed because it tried to
2256 read the rcpt_include_affixes from the non-existent transport. Now it
2257 just assumes that the setting of that option is false. This bug was
2258 introduced by 4.51/PH/31.
2260 PH/28 Changed -d+all to exclude +memory, because that information is very
2261 rarely of interest, but it makes the output a lot bigger. People tend to
2262 do -d+all out of habit.
2264 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2265 code in os-type was giving problems when libc.so lives in lib64, like on
2266 x86_64 Fedora Core.
2268 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2269 aren't the modern standard, and it seems that some systems' include files
2270 don't always have them. Exim was already checking for some of the newer
2271 ones like T_AAAA, and defining it itself. I've added checks for all the
2272 record types that Exim uses.
2274 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2275 not automatically generating a new one, as it is supposed to. This
2276 prevented TLS from working. If the file did exist, but contained invalid
2277 data, a new version was generated, as expected. It was only the case of a
2278 non-existent file that was broken.
2280 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2281 with a change in libdomainkeys > 0.64.
2283 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2284 from DNS. If the selector record carries the flag, it now has
2285 precedence over the domain-wide flag.
2287 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2289 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2290 the use of a port name that isn't defined in /etc/services) occurred, the
2291 message was deferred as in a normal delivery, and thus remained on the
2292 spool, instead of being failed because of the mua_wrapper setting. This
2293 is now fixed, and I tidied up some of the mua_wrapper messages at the
2294 same time.
2296 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2297 the messages in a hash of arrays rather than using individual hashes.
2298 This is a bit cleaner and results in dramatic memory savings, albeit
2299 at a slight CPU cost.
2301 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2302 as requested by Marc Sherman.
2304 SC/10 Eximstats: added histograms for user specified patterns as requested
2305 by Marc Sherman.
2307 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2309 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2310 fopen() in the content-scanning modules that did not already have it.
2313 Exim version 4.51
2314 -----------------
2316 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2317 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2319 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2321 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2323 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2324 to test Sieve filters that use "vacation".
2326 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2327 that changes the way the GnuTLS parameters are stored in the cache file.
2328 The new format can be generated externally. For backward compatibility,
2329 if the data in the cache doesn't make sense, Exim assumes it has read an
2330 old-format file, and it generates new data and writes a new file. This
2331 means that you can't go back to an older release without removing the
2332 file.
2334 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2335 work if there are any delivery delays because "one_time" forces the
2336 parent to be marked "delivered", so its unseen clone is never tried
2337 again. For this reason, Exim now forbids the simultaneous setting of
2338 these two options.
2340 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2341 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2342 entry if you want to know the details. The fix, however, neglected to
2343 consider the case when local delivery batching is involved. The test for
2344 "previously delivered" was not happening when checking to see if an
2345 address could be batched with a previous (undelivered) one; under
2346 certain circumstances this could lead to multiple deliveries to the same
2347 address.
2349 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2350 in its include files, and this causes problems building Exim.
2352 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2353 header_syntax) but Exim was just ignoring anything given after a slash.
2354 In particular, this caused confusion with an attempt to use "verify =
2355 reverse_host_lookup/defer_ok". An error is now given when options are
2356 supplied for verify items that do not have them. (Maybe reverse_host_
2357 lookup should have a defer_ok option, but that's a different point.)
2359 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2360 defined by RFC 821) to 2048, because there were problems with some AUTH
2361 commands, and RFC 1869 says the size should be increased for extended
2362 SMTP commands that take arguments.
2364 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2365 Finch).
2367 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2368 "unknown" error; now it says that the functionality isn't in the binary.
2370 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2371 an address' error message when a string expansion fails (syntax or
2372 whatever). Otherwise the password may appear in the log. Following change
2373 PH/42 below, there is no longer a chance of it appearing in a bounce
2374 message.
2376 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2378 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2379 of its addresses was ever tried. (Bugzilla bug #2.)
2381 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2382 the result incorrectly in the debug output. (It correctly added a newline
2383 to what was transported.)
2385 TF/01 Added $received_time.
2387 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2388 commented out examples of how to interface to a virus scanner and to
2389 SpamAssassin. Also added commented examples of av_scanner and
2390 spamd_address settings.
2392 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2393 and controls are allowed in which ACLs. There were a couple of minor
2394 errors. Some of the entries in the conditions table (which is a table of
2395 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2396 negation of where the condition IS allowed.
2398 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2400 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2401 header file does not have a version number, so I've had to invent a new
2402 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2403 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2404 radiusclient), but it was contributed by a Radius user.
2406 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2407 files or directories, for OpenSSL.
2409 PH/19 When an Exim process that is running as root has to create an Exim log
2410 file, it does so in a subprocess that runs as exim:exim so as to get the
2411 ownership right at creation (otherwise, other Exim processes might see
2412 the file with the wrong ownership). There was no test for failure of this
2413 fork() call, which would lead to the process getting stuck as it waited
2414 for a non-existent subprocess. Forks do occasionally fail when resources
2415 run out. I reviewed all the other calls to fork(); they all seem to check
2416 for failure.
2418 PH/20 When checking for unexpected SMTP input at connect time (before writing
2419 the banner), Exim was not dealing correctly with a non-positive return
2420 from the read() function. If the client had disconnected by this time,
2421 the result was a log entry for a synchronization error with an empty
2422 string after "input=" when read() returned zero. If read() returned -1
2423 (an event I could not check), uninitialized data bytes were printed.
2424 There were reports of junk text (parts of files, etc) appearing after
2425 "input=".
2427 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2429 PH/22 Added support for macro redefinition, and (re)definition in between
2430 driver and ACL definitions.
2432 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2433 forgetting to use the resulting value; it was using the unexpanded value.
2435 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2436 hadn't been configured. The fix is from Juergen Kreileder, who
2437 understands it better than I do:
2439 "Here's what I see happening with three configured cyrus_sasl
2440 authenticators configured (plain, login, cram-md5):
2442 On startup auth_cyrus_sasl_init() gets called for each of these.
2443 This means three calls to sasl_listmech() without a specified mech_list.
2444 => SASL tests which mechs of all available mechs actually work
2445 => three warnings about OTP not working
2446 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2448 With the patch, sasl_listmech() also gets called three times. But now
2449 SASL's mech_list option is set to the server_mech specified in the the
2450 authenticator. Or in other words, the answer from sasl_listmech()
2451 gets limited to just the mech you're testing for (which is different
2452 for each call.)
2453 => the return list contains just 'plain' or 'login', 'cram-md5' or
2454 nothing depending on the value of ob->server_mech.
2456 I've just tested the patch: Authentication still works fine,
2457 unavailable mechs specified in the exim configuration are still
2458 caught, and the auth.log warnings about OTP are gone."
2460 PH/25 When debugging is enabled, the contents of the command line are added
2461 to the debugging output, even when log_selector=+arguments is not
2462 specified.
2464 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2465 answer is "GNU", and only if the return is "GNU/something" is the answer
2466 "Linux".
2468 PH/27 $acl_verify_message is now set immediately after the failure of a
2469 verification in an ACL, and so is available in subsequent modifiers. In
2470 particular, the message can be preserved by coding like this:
2472 warn !verify = sender
2473 set acl_m0 = $acl_verify_message
2475 Previously, $acl_verify_message was set only while expanding "message"
2476 and "log_message" when a very denied access.
2478 PH/28 Modified OS/os.c-Linux with
2480 -#ifndef OS_LOAD_AVERAGE
2481 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2483 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2484 nomenclature these days.)
2486 PH/29 Installed patch from the Sieve maintainer that adds the options
2487 sieve_useraddress and sieve_subaddress to the redirect router.
2489 PH/30 In these circumstances:
2490 . Two addresses routed to the same list of hosts;
2491 . First host does not offer TLS;
2492 . First host accepts first address;
2493 . First host gives temporary error to second address;
2494 . Second host offers TLS and a TLS session is established;
2495 . Second host accepts second address.
2496 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2497 and peerdn, if requested) that were in fact used only for the second
2498 address.
2500 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2501 attention to any local part prefix or suffix that was matched by the
2502 router that accepted the address. It now behaves in the same way as it
2503 does for delivery: the affixes are removed from the local part unless
2504 rcpt_include_affixes is set on the transport.
2506 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2507 timeout during the DATA phase of an incoming message.
2509 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2510 applied a patch sanctioned by the Sieve maintainer.
2512 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2513 the uid or gid is negative. A case of a negative gid caused this to be
2514 noticed. The fix allows for either to be negative.
2516 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2517 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2518 overlooked.
2520 PH/36 The change PH/12 above was broken. Fixed it.
2522 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2523 the grounds that routing the same address twice would always produce the
2524 same answer. This might have been true once, but it is certainly no
2525 longer true now. Routing a child address may depend on the previous
2526 routing that produced that child. Some complicated redirection strategies
2527 went wrong when messages had multiple recipients, and made Exim's
2528 behaviour dependent on the order in which the addresses were given.
2530 I have moved the duplicate checking until after the routing is complete.
2531 Exim scans the addresses that are assigned to local and remote
2532 transports, and removes any duplicates. This means that more work will be
2533 done, as duplicates will always all be routed, but duplicates are
2534 presumably rare, so I don't expect this is of any significance.
2536 For deliveries to pipes, files, and autoreplies, the duplicate checking
2537 still happens during the routing process, since they are not going to be
2538 routed further.
2540 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2541 It corrects a timeout issue with spamd. This is Ian's comment: "The
2542 background is that sometimes spamd either never reads data from a
2543 connection it has accepted, or it never writes response data. The exiscan
2544 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2545 blindly assumes that writes won't block so it may never time out."
2547 PH/39 Allow G after quota size as well as K and M.
2549 PH/40 The value set for $authenticated_id in an authenticator may not contain
2550 binary zeroes or newlines because the value is written to log lines and
2551 to spool files. There was no check on this. Now the value is run through
2552 the string_printing() function so that such characters are converted to
2553 printable escape sequences.
2555 PH/41 $message_linecount is a new variable that contains the total number of
2556 lines in the message. Compare $body_linecount, which is the count for the
2557 body only.
2559 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2560 bounce and delay warning messages, except in certain special cases, which
2561 are as follows:
2563 (a) An SMTP error message from a remote host;
2564 (b) A message specified in a :fail: redirection;
2565 (c) A message specified in a "fail" command in a system filter;
2566 (d) A message specified in a FAIL return from the queryprogram router;
2567 (e) A message specified by the cannot_route_message router option.
2569 In these cases only, Exim does include the error details in bounce and
2570 warning messages. There are also a few cases where bland messages such
2571 as "unrouteable address" or "local delivery error" are given.
2573 PH/43 $value is now also set for the "else" part of a ${run expansion.
2575 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2576 being worked on, but at least Exim now implements the latest version to
2577 play with."
2579 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2580 process to complete was treated as a delivery failure, a timeout while
2581 writing the message to the pipe was logged, but erroneously treated as a
2582 successful delivery. Such timeouts include transport filter timeouts. For
2583 consistency with the overall process timeout, these timeouts are now
2584 treated as errors, giving rise to delivery failures by default. However,
2585 there is now a new Boolean option for the pipe transport called
2586 timeout_defer, which, if set TRUE, converts the failures into defers for
2587 both kinds of timeout. A transport filter timeout is now identified in
2588 the log output.
2590 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2591 systems where "make" and "gmake" are different, calling "gmake" at top
2592 level broke things. I've arranged for the value of $(MAKE) to be passed
2593 from the Makefile to this script so that it can call the same version of
2594 "make".
2597 A note about Exim versions 4.44 and 4.50
2598 ----------------------------------------
2600 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2601 changes of various kinds. As a consequence, a big documentation update was
2602 needed. This delayed the release for rather longer than seemed good, especially
2603 in the light of a couple of (minor) security issues. Therefore, the changes
2604 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2605 release. So 4.44 and 4.50 are in effect two different branches that both start
2606 from 4.43.
2608 I have left the 4.50 change log unchanged; it contains all the changes since
2609 4.43. The change log for 4.44 is below; many of its items are identical to
2610 those for 4.50. This seems to be the most sensible way to preserve the
2611 historical information.
2614 Exim version 4.50
2615 -----------------
2617 1. Minor wording change to the doc/README.SIEVE file.
2619 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2620 computation of the current number of files was incorrect.
2622 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2623 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2624 place.
2626 4. Give more explanation in the error message when the command for a transport
2627 filter fails to execute.
2629 5. There are several places where Exim runs a non-Exim command in a
2630 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2631 was being done only for the command run by the queryprogram router. It is
2632 now done for all such subprocesses. The other cases are: ${run, transport
2633 filters, and the commands run by the lmtp and pipe transports.
2635 6. Added CONFIGURE_GROUP build-time option.
2637 7. Some older OS have a limit of 256 on the maximum number of file
2638 descriptors. Exim was using setrlimit() to set 1000 as a large value
2639 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2640 systems. I've change it so that if it can't get 1000, it tries for 256.
2642 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2643 was an oversight, and furthermore, ever since the addition of extra
2644 controls (e.g. 4.43/32), the checks on when to allow different forms of
2645 "control" were broken. There should now be diagnostics for all cases when a
2646 control that does not make sense is encountered.
2648 9. Added the /retain_sender option to "control=submission".
2650 10. $recipients is now available in the predata ACL (oversight).
2652 11. Tidy the search cache before the fork to do a delivery from a message
2653 received from the command line. Otherwise the child will trigger a lookup
2654 failure and thereby defer the delivery if it tries to use (for example) a
2655 cached ldap connection that the parent has called unbind on.
2657 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2658 of $address_data from the recipient verification was clobbered by the
2659 sender verification.
2661 13. The value of address_data from a sender verification is now available in
2662 $sender_address_data in subsequent conditions in the ACL statement.
2664 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2666 15. Added a new option "connect=<time>" to callout options, to set a different
2667 connection timeout.
2669 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2670 was its contents. (It was OK if the option was not defined at all.)
2672 17. A "Completed" log line is now written for messages that are removed from
2673 the spool by the -Mrm option.
2675 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2676 information about exactly what failed.
2678 19. Added -dd to debug only the daemon process.
2680 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2681 handles timeouts, both on the server side and network timeouts. Renamed the
2682 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2684 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2685 It is now set to "smtps".
2687 22. $host_address is now set to the target address during the checking of
2688 ignore_target_hosts.
2690 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2691 being passed; this would have caused $sender_host_name to have been used if
2692 matching the list had actually called for a host name (not very likely,
2693 since this list is usually IP addresses). A host name is now passed as
2694 "[x.x.x.x]".
2696 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2697 code that specifies a non-restarting handler (typically sigaction() in
2698 modern systems) in an attempt to fix a rare and obscure crash bug.
2700 25. Narrowed the window for a race in the daemon that could cause it to ignore
2701 SIGCHLD signals. This is not a major problem, because they are used only to
2702 wake it up if nothing else does.
2704 26. A malformed maildirsize file could cause Exim to calculate negative values
2705 for the mailbox size or file count. Odd effects could occur as a result.
2706 The maildirsize information is now recalculated if the size or filecount
2707 end up negative.
2709 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2710 support for a long time. Removed HAVE_SYS_VFS_H.
2712 28. Installed the latest version of exipick from John Jetmore.
2714 29. In an address list, if the pattern was not a regular expression, an empty
2715 subject address (from a bounce message) matched only if the pattern was an
2716 empty string. Non-empty patterns were not even tested. This was the wrong
2717 because it is perfectly reasonable to use an empty address as part of a
2718 database query. An empty address is now tested by patterns that are
2719 lookups. However, all the other forms of pattern expect the subject to
2720 contain a local part and a domain, and therefore, for them, an empty
2721 address still always fails if the pattern is not itself empty.
2723 30. Exim went into a mad DNS loop when attempting to do a callout where the
2724 host was specified on an smtp transport, and looking it up yielded more
2725 than one IP address.
2727 31. Re-factored the code for checking spool and log partition space into a
2728 function that finds that data and another that does the check. The former
2729 is then used to implement four new variables: $spool_space, $log_space,
2730 $spool_inodes, and $log_inodes.
2732 32. The RFC2047 encoding function was originally intended for short strings
2733 such as real names; it was not keeping to the 75-character limit for
2734 encoded words that the RFC imposes. It now respects the limit, and
2735 generates multiple encoded words if necessary. To be on the safe side, I
2736 have increased the buffer size for the ${rfc2047: expansion operator from
2737 1024 to 2048 bytes.
2739 33. It is now permitted to omit both strings after an "if" condition; if the
2740 condition is true, the result is "true". As before, when the second string
2741 is omitted, a false condition yields an empty string. This makes it less
2742 cumbersome to write custom ACL and router conditions.
2744 34. Failure to deliver a bounce message always caused it to be frozen, even if
2745 there was an errors_to setting on the router. The errors_to setting is now
2746 respected.
2748 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2749 canonical form (fully expanded) before being placed in
2750 $sender_host_address.
2752 36. The table in the code that translates DNS record types into text (T_A to
2753 "A" for instance) was missing entries for NS and CNAME. It is just possible
2754 that this could have caused confusion if both these types were looked up
2755 for the same domain, because the text type is used as part of Exim's
2756 per-process caching. But the chance of anyone hitting this buglet seems
2757 very small.
2759 37. The dnsdb lookup has been extended in a number of ways.
2761 (1) There is a new type, "zns", which walks up the domain tree until it
2762 finds some nameserver records. It should be used with care.
2764 (2) There is a new type, "mxh", which is like "mx" except that it returns
2765 just the host names, not the priorities.
2767 (3) It is now possible to give a list of domains (or IP addresses) to be
2768 looked up. The behaviour when one of the lookups defers can be
2769 controlled by a keyword.
2771 (4) It is now possible to specify the separator character for use when
2772 multiple records are returned.
2774 38. The dnslists ACL condition has been extended: it is now possible to supply
2775 a list of IP addresses and/or domains to be looked up in a particular DNS
2776 domain.
2778 39. Added log_selector=+queue_time_overall.
2780 40. When running the queue in the test harness, wait just a tad after forking a
2781 delivery process, to get repeatability of debugging output.
2783 41. Include certificate and key file names in error message when GnuTLS fails
2784 to set them up, because the GnuTLS error message doesn't include the name
2785 of the failing file when there is a problem reading it.
2787 42. Allow both -bf and -bF in the same test run.
2789 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2791 44. The "Exiscan patch" is now merged into the mainline Exim source.
2793 45. Sometimes the final signoff response after QUIT could fail to get
2794 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2795 < 0 before doing a fflush(). This bug looks as though it goes back to the
2796 introduction of TLS in release 3.20, but "sometimes" must have been rare
2797 because the tests only now provoked it.
2799 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2800 (this can affect the format of dates).
2802 47. exim_tidydb, when checking for the continued existence of a message for
2803 which it has found a message-specific retry record, was not finding
2804 messages that were in split spool directories. Consequently, it was
2805 deleting retry records that should have stayed in existence.
2807 48. Steve fixed some bugs in eximstats.
2809 49. The SPA authentication driver was not abandoning authentication and moving
2810 on to the next authenticator when an expansion was forced to fail,
2811 contradicting the general specification for all authenticators. Instead it
2812 was generating a temporary error. It now behaves as specified.
2814 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2815 (the order specifies the preference for clients). The order is now AES256,
2816 AES128, 3DES, ARCFOUR128.
2818 51. Small patch to Sieve code - explicitly set From: when generating an
2819 autoreply.
2821 52. Exim crashed if a remote delivery caused a very long error message to be
2822 recorded - for instance if somebody sent an entire SpamAssassin report back
2823 as a large number of 550 error lines. This bug was coincidentally fixed by
2824 increasing the size of one of Exim's internal buffers (big_buffer) that
2825 happened as part of the Exiscan merge. However, to be on the safe side, I
2826 have made the code more robust (and fixed the comments that describe what
2827 is going on).
2829 53. Now that there can be additional text after "Completed" in log lines (if
2830 the queue_time_overall log selector is set), a one-byte patch to exigrep
2831 was needed to allow it to recognize "Completed" as not the last thing in
2832 the line.
2834 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2835 patch that reportedly fixes this has been added. I am not expert enough to
2836 create a test for it. This is what the patch creator wrote:
2838 "I found a little strange behaviour of ldap code when working with
2839 Windows 2003 AD Domain, where users was placed in more than one
2840 Organization Units. When I tried to give exim partial DN, the exit code
2841 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2842 But simultaneously result of request was absolutely normal ldap result,
2843 so I produce this patch..."
2845 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2846 REFERENCE, so I have modified the code to exclude the patch when that macro
2847 is not defined.
2849 55. Some experimental protocols are using DNS PTR records for new purposes. The
2850 keys for these records are domain names, not reversed IP addresses. The
2851 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2852 leaves it alone. Component reversal etc. now happens only for IP addresses.
2853 CAN-2005-0021
2855 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2857 57. Double the size of the debug message buffer (to 2048) so that more of very
2858 long debug lines gets shown.
2860 58. The exicyclog utility now does better if the number of log files to keep
2861 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2863 59. Two changes related to the smtp_active_hostname option:
2865 (1) $smtp_active_hostname is now available as a variable.
2866 (2) The default for smtp_banner uses $smtp_active_hostname instead
2867 of $primary_hostname.
2869 60. The host_aton() function is supposed to be passed a string that is known
2870 to be a valid IP address. However, in the case of IPv6 addresses, it was
2871 not checking this. This is a hostage to fortune. Exim now panics and dies
2872 if the condition is not met. A case was found where this could be provoked
2873 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2874 components; fortuitously, this particular loophole had already been fixed
2875 by change 4.50/55 above.
2877 If there are any other similar loopholes, the new check in host_aton()
2878 itself should stop them being exploited. The report I received stated that
2879 data on the command line could provoke the exploit when Exim was running as
2880 exim, but did not say which command line option was involved. All I could
2881 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2882 running as the user.
2883 CAN-2005-0021
2885 61. There was a buffer overflow vulnerability in the SPA authentication code
2886 (which came originally from the Samba project). I have added a test to the
2887 spa_base64_to_bits() function which I hope fixes it.
2888 CAN-2005-0022
2890 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2891 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2893 63. The daemon start-up calls getloadavg() while still root for those OS that
2894 need the first call to be done as root, but it missed one case: when
2895 deliver_queue_load_max is set with deliver_drop_privilege. This is
2896 necessary for the benefit of the queue runner, because there is no re-exec
2897 when deliver_drop_privilege is set.
2899 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2900 This has been fixed.
2902 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2903 was in use, was not putting the data itself into the right store pool;
2904 consequently, it could be overwritten for a subsequent message in the same
2905 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2906 the caching.)
2908 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2910 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2911 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2912 the function were treating the return as a boolean value, which happened to
2913 work because 0=false and not-0=true, but is not correct code.
2915 68. The host_aton() function was not handling scoped IPv6 addresses (those
2916 with, for example, "%eth0" on the end) correctly.
2918 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2919 negated items (that is, ~something) in unsigned ints. Some compilers
2920 apparently mutter when there is no cast.
2922 70. If an address verification called from an ACL failed, and did not produce a
2923 user-specific message (i.e. there was only a "system" message), nothing was
2924 put in $acl_verify_message. In this situation, it now puts the system
2925 message there.
2927 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2928 session; change 4.31/43 added the unwanted input to the log line - except
2929 that it did not do this in the start of session case. It now does.
2931 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2932 This is wrong and can cause the other end to generate a synchronization
2933 error if it is another Exim or anything else that does the synchronization
2934 check. A QUIT command is no longer sent after a timeout.
2936 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2937 during host lookups.
2939 74. The defer_ok option of callout verification was not working if it was used
2940 when verifying addresses in header lines, that is, for this case:
2942 verify = header_sender/callout=defer_ok
2944 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2945 those file descriptors could be used for SMTP connections. If anything
2946 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2947 could be sent to the SMTP client, causing chaos. The daemon now opens
2948 stdin, stdout, and stderr to /dev/null when it puts itself into the
2949 background.
2951 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2952 log by default. The user can override this with suitable Perl magic.
2954 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2955 the log message when discard triggers, was not working for the DATA ACL or
2956 for the non-SMTP ACL.
2958 78. Error message wording change in sieve.c.
2960 79. If smtp_accept_max_per_host was set, the number of connections could be
2961 restricted to fewer than expected, because the daemon was trying to set up
2962 a new connection before checking whether the processes handling previous
2963 connections had finished. The check for completed processes is now done
2964 earlier. On busy systems, this bug wouldn't be noticed because something
2965 else would have woken the daemon, and it would have reaped the completed
2966 process earlier.
2968 80. If a message was submitted locally by a user whose login name contained one
2969 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2970 It caused a spool format error. I have fixed the spool reading code. A
2971 related problem was that the "from" clause in the Received: line became
2972 illegal because of the space(s). It is now covered by ${quote_local_part.
2974 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2975 tables).
2977 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2979 83. Patch from Sieve maintainer to fix unterminated string problem in
2980 "vacation" handling.
2982 84. Some minor changes to the Linux configuration files to help with other
2983 OS variants using glibc.
2985 85. One more patch for Sieve to update vacation handling to latest spec.
2988 ----------------------------------------------------
2989 See the note above about the 4.44 and 4.50 releases.
2990 ----------------------------------------------------
2993 Exim version 4.44
2994 -----------------
2996 1. Change 4.43/35 introduced a bug that caused file counts to be
2997 incorrectly computed when quota_filecount was set in an appendfile
2998 transport
3000 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3001 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3002 place.
3004 3. Give more explanation in the error message when the command for a transport
3005 filter fails to execute.
3007 4. There are several places where Exim runs a non-Exim command in a
3008 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3009 was being done only for the command run by the queryprogram router. It is
3010 now done for all such subprocesses. The other cases are: ${run, transport
3011 filters, and the commands run by the lmtp and pipe transports.
3013 5. Some older OS have a limit of 256 on the maximum number of file
3014 descriptors. Exim was using setrlimit() to set 1000 as a large value
3015 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3016 systems. I've change it so that if it can't get 1000, it tries for 256.
3018 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3019 was an oversight, and furthermore, ever since the addition of extra
3020 controls (e.g. 4.43/32), the checks on when to allow different forms of
3021 "control" were broken. There should now be diagnostics for all cases when a
3022 control that does not make sense is encountered.
3024 7. $recipients is now available in the predata ACL (oversight).
3026 8. Tidy the search cache before the fork to do a delivery from a message
3027 received from the command line. Otherwise the child will trigger a lookup
3028 failure and thereby defer the delivery if it tries to use (for example) a
3029 cached ldap connection that the parent has called unbind on.
3031 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3032 of $address_data from the recipient verification was clobbered by the
3033 sender verification.
3035 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3036 was its contents. (It was OK if the option was not defined at all.)
3038 11. A "Completed" log line is now written for messages that are removed from
3039 the spool by the -Mrm option.
3041 12. $host_address is now set to the target address during the checking of
3042 ignore_target_hosts.
3044 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3045 being passed; this would have caused $sender_host_name to have been used if
3046 matching the list had actually called for a host name (not very likely,
3047 since this list is usually IP addresses). A host name is now passed as
3048 "[x.x.x.x]".
3050 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3051 code that specifies a non-restarting handler (typically sigaction() in
3052 modern systems) in an attempt to fix a rare and obscure crash bug.
3054 15. Narrowed the window for a race in the daemon that could cause it to ignore
3055 SIGCHLD signals. This is not a major problem, because they are used only to
3056 wake it up if nothing else does.
3058 16. A malformed maildirsize file could cause Exim to calculate negative values
3059 for the mailbox size or file count. Odd effects could occur as a result.
3060 The maildirsize information is now recalculated if the size or filecount
3061 end up negative.
3063 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3064 support for a long time. Removed HAVE_SYS_VFS_H.
3066 18. Updated exipick to current release from John Jetmore.
3068 19. Allow an empty sender to be matched against a lookup in an address list.
3069 Previously the only cases considered were a regular expression, or an
3070 empty pattern.
3072 20. Exim went into a mad DNS lookup loop when doing a callout where the
3073 host was specified on the transport, if the DNS lookup yielded more than
3074 one IP address.
3076 21. The RFC2047 encoding function was originally intended for short strings
3077 such as real names; it was not keeping to the 75-character limit for
3078 encoded words that the RFC imposes. It now respects the limit, and
3079 generates multiple encoded words if necessary. To be on the safe side, I
3080 have increased the buffer size for the ${rfc2047: expansion operator from
3081 1024 to 2048 bytes.
3083 22. Failure to deliver a bounce message always caused it to be frozen, even if
3084 there was an errors_to setting on the router. The errors_to setting is now
3085 respected.
3087 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3088 canonical form (fully expanded) before being placed in
3089 $sender_host_address.
3091 24. Updated eximstats to version 1.33
3093 25. Include certificate and key file names in error message when GnuTLS fails
3094 to set them up, because the GnuTLS error message doesn't include the name
3095 of the failing file when there is a problem reading it.
3097 26. Expand error message when OpenSSL has problems setting up cert/key files.
3098 As per change 25.
3100 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3101 (this can affect the format of dates).
3103 28. exim_tidydb, when checking for the continued existence of a message for
3104 which it has found a message-specific retry record, was not finding
3105 messages that were in split spool directories. Consequently, it was
3106 deleting retry records that should have stayed in existence.
3108 29. eximstats updated to version 1.35
3109 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3110 1.35 - bugfix such that pie charts by volume are generated correctly
3112 30. The SPA authentication driver was not abandoning authentication and moving
3113 on to the next authenticator when an expansion was forced to fail,
3114 contradicting the general specification for all authenticators. Instead it
3115 was generating a temporary error. It now behaves as specified.
3117 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3118 (the order specifies the preference for clients). The order is now AES256,
3119 AES128, 3DES, ARCFOUR128.
3121 31. Small patch to Sieve code - explicitly set From: when generating an
3122 autoreply.
3124 32. Exim crashed if a remote delivery caused a very long error message to be
3125 recorded - for instance if somebody sent an entire SpamAssassin report back
3126 as a large number of 550 error lines. This bug was coincidentally fixed by
3127 increasing the size of one of Exim's internal buffers (big_buffer) that
3128 happened as part of the Exiscan merge. However, to be on the safe side, I
3129 have made the code more robust (and fixed the comments that describe what
3130 is going on).
3132 33. Some experimental protocols are using DNS PTR records for new purposes. The
3133 keys for these records are domain names, not reversed IP addresses. The
3134 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3135 leaves it alone. Component reversal etc. now happens only for IP addresses.
3136 CAN-2005-0021
3138 34. The host_aton() function is supposed to be passed a string that is known
3139 to be a valid IP address. However, in the case of IPv6 addresses, it was
3140 not checking this. This is a hostage to fortune. Exim now panics and dies
3141 if the condition is not met. A case was found where this could be provoked
3142 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3143 components; fortuitously, this particular loophole had already been fixed
3144 by change 4.50/55 or 4.44/33 above.
3146 If there are any other similar loopholes, the new check in host_aton()
3147 itself should stop them being exploited. The report I received stated that
3148 data on the command line could provoke the exploit when Exim was running as
3149 exim, but did not say which command line option was involved. All I could
3150 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3151 running as the user.
3152 CAN-2005-0021
3154 35. There was a buffer overflow vulnerability in the SPA authentication code
3155 (which came originally from the Samba project). I have added a test to the
3156 spa_base64_to_bits() function which I hope fixes it.
3157 CAN-2005-0022
3159 36. The daemon start-up calls getloadavg() while still root for those OS that
3160 need the first call to be done as root, but it missed one case: when
3161 deliver_queue_load_max is set with deliver_drop_privilege. This is
3162 necessary for the benefit of the queue runner, because there is no re-exec
3163 when deliver_drop_privilege is set.
3165 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3166 was in use, was not putting the data itself into the right store pool;
3167 consequently, it could be overwritten for a subsequent message in the same
3168 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3169 the caching.)
3171 38. Sometimes the final signoff response after QUIT could fail to get
3172 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3173 < 0 before doing a fflush(). This bug looks as though it goes back to the
3174 introduction of TLS in release 3.20, but "sometimes" must have been rare
3175 because the tests only now provoked it.
3178 Exim version 4.43
3179 -----------------
3181 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3182 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3183 Now it returns an integer. A number of calls were still expecting a T/F
3184 return. Fortuitously, in all cases, the tests worked in OK situations,
3185 which is the norm. However, things would have gone wrong on any write
3186 failures on the smtp file descriptor. This function is used when sending
3187 messages over SMTP and also when doing verify callouts.
3189 2. When Exim is called to do synchronous delivery of a locally submitted
3190 message (the -odf or -odi options), it no longer closes stderr before doing
3191 the delivery.
3193 3. Implemented the mua_wrapper option.
3195 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3197 5. Implemented the functions header_remove(), header_testname(),
3198 header_add_at_position(), and receive_remove_recipient(), and exported them
3199 to local_scan().
3201 6. If an ACL "warn" statement specified the addition of headers, Exim already
3202 inserted X-ACL-Warn: at the start if there was no header name. However, it
3203 was not making this test for the second and subsequent header lines if
3204 there were newlines in the string. This meant that an invalid header could
3205 be inserted if Exim was badly configured.
3207 7. Allow an ACL "warn" statement to add header lines at the start or after all
3208 the Received: headers, as well as at the end.
3210 8. Added the rcpt_4xx retry error code.
3212 9. Added postmaster_mailfrom=xxx to callout verification option.
3214 10. Added mailfrom=xxxx to the callout verification option, for verify=
3215 header_sender only.
3217 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3218 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3220 12. Inserted some casts to stop certain compilers warning when using pointer
3221 differences as field lengths or precisions in printf-type calls (mostly
3222 affecting debugging statements).
3224 13. Added optional readline() support for -be (dynamically loaded).
3226 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3227 same clock tick as a message's arrival, so that its received time was the
3228 same as the "first fail" time on the retry record, and that message
3229 remained on the queue past the ultimate address timeout, every queue runner
3230 would try a delivery (because it was past the ultimate address timeout) but
3231 after another failure, the ultimate address timeout, which should have then
3232 bounced the address, did not kick in. This was a "< instead of <=" error;
3233 in most cases the first failure would have been in the next clock tick
3234 after the received time, and all would be well.
3236 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3237 being recognized when the domain list was tested by the match_domain
3238 condition in an expansion string.
3240 16. Added the ${str2b64: operator.
3242 17. Exim was always calling setrlimit() to set a large limit for the number of
3243 processes, without checking whether the existing limit was already
3244 adequate. (It did check for the limit on file descriptors.) Furthermore,
3245 errors from getrlimit() and setrlimit() were being ignored. Now they are
3246 logged to the main and panic logs, but Exim does carry on, to try to do its
3247 job under whatever limits there are.
3249 18. Imported PCRE 5.0.
3251 19. Trivial typo in log message " temporarily refused connection" (the leading
3252 space).
3254 20. If the log selector return_path_on_delivery was set and an address was
3255 redirected to /dev/null, the delivery process crashed because it assumed
3256 that a return path would always be set for a "successful" delivery. In this
3257 case, the whole delivery is bypassed as an optimization, and therefore no
3258 return path is set.
3260 21. Internal re-arrangement: the function for sending a challenge and reading
3261 a response while authentication was assuming a zero-terminated challenge
3262 string. It's now changed to take a pointer and a length, to allow for
3263 binary data in such strings.
3265 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3267 23. Exim was not respecting finduser_retries when seeking the login of the
3268 uid under which it was called; it was always trying 10 times. (The default
3269 setting of finduser_retries is zero.) Also, it was sleeping after the final
3270 failure, which is pointless.
3272 24. Implemented tls_on_connect_ports.
3274 25. Implemented acl_smtp_predata.
3276 26. If the domain in control=submission is set empty, Exim assumes that the
3277 authenticated id is a complete email address when it generates From: or
3278 Sender: header lines.
3280 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3281 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3282 chown and chgrp in /bin and hostname in /usr/bin.
3284 28. Exim was keeping the "process log" file open after each use, just as it
3285 does for the main log. This opens the possibility of it remaining open for
3286 long periods when the USR1 signal hits a daemon. Occasional processlog
3287 errors were reported, that could have been caused by this. Anyway, it seems
3288 much more sensible not to leave this file open at all, so that is what now
3289 happens.
3291 29. The long-running daemon process does not normally write to the log once it
3292 has entered its main loop, and it closes the log before doing so. This is
3293 so that log files can straightforwardly be renamed and moved. However,
3294 there are a couple of unusual error situations where the daemon does write
3295 log entries, and I had neglected to close the log afterwards.
3297 30. The text of an SMTP error response that was received during a remote
3298 delivery was being truncated at 512 bytes. This is too short for some of
3299 the long messages that one sometimes sees. I've increased the limit to
3300 1024.
3302 31. It is now possible to make retry rules that apply only when a message has a
3303 specific sender, in particular, an empty sender.
3305 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3306 it possible to be selective about when SMTP synchronization is enforced.
3308 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3310 32. Implemented hosts_connection_nolog.
3312 33. Added an ACL for QUIT.
3314 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3315 syntax error.
3317 35. Added mailbox_size and mailbox_filecount to appendfile.
3319 36. Added control = no_multiline_responses to ACLs.
3321 37. There was a bug in the logic of the code that waits for the clock to tick
3322 in the case where the clock went backwards by a substantial amount such
3323 that the microsecond fraction of "now" was more than the microsecond
3324 fraction of "then" (but the whole seconds number was less).
3326 38. Added support for the libradius Radius client library this is found on
3327 FreeBSD (previously only the radiusclient library was supported).
3330 Exim version 4.42
3331 -----------------
3333 1. When certain lookups returned multiple values in the form name=value, the
3334 quoting of the values was not always being done properly. Specifically:
3335 (a) If the value started with a double quote, but contained no whitespace,
3336 it was not quoted.
3337 (b) If the value contained whitespace other than a space character (i.e.
3338 tabs or newlines or carriage returns) it was not quoted.
3339 This fix has been applied to the mysql and pgsql lookups by writing a
3340 separate quoting function and calling it from the lookup code. The fix
3341 should probably also be applied to nisplus, ibase and oracle lookups, but
3342 since I cannot test any of those, I have not disturbed their existing code.
3344 2. A hit in the callout cache for a specific address caused a log line with no
3345 reason for rejecting RCPT. Now it says "Previous (cached) callout
3346 verification failure".
3348 3. There was an off-by-one bug in the queryprogram router. An over-long
3349 return line was truncated at 256 instead of 255 characters, thereby
3350 overflowing its buffer with the terminating zero. As well as fixing this, I
3351 have increased the buffer size to 1024 (and made a note to document this).
3353 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3354 when Exim is waiting for an SMTP response from a remote server, Exim
3355 restarts its select() call on the socket, thereby resetting its timeout.
3356 This is not a problem when such interrupts are rare. Somebody set up a cron
3357 job to run exiwhat every 2 minutes, which is less than the normal select()
3358 timeout (5 or 10 minutes). This meant that the select() timeout never
3359 kicked in because it was always reset. I have fixed this by comparing the
3360 time when an interrupt arrives with the time at the start of the first call
3361 to select(). If more time than the timeout has elapsed, the interrupt is
3362 treated as a timeout.
3364 5. Some internal re-factoring in preparation for the addition of Sieve
3365 extensions (by MH). In particular, the "personal" test is moved to a
3366 separate function, and given an option for scanning Cc: and Bcc: (which is
3367 not set for Exim filters).
3369 6. When Exim created an email address using the login of the caller as the
3370 local part (e.g. when creating a From: or Sender: header line), it was not
3371 quoting the local part when it contained special characters such as @.
3373 7. Installed new OpenBSD configuration files.
3375 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3376 try to make them clearer.
3378 9. Callout options, other than the timeout value, were being ignored when
3379 verifying sender addresses in header lines. For example, when using
3381 verify = header_sender/callout=no_cache
3383 the cache was (incorrectly) being used.
3385 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3386 only the Cygwin environment.
3388 11. When return_path_on_delivery was set as a log selector, if different remote
3389 addresses in the same message used different return paths and parallel
3390 remote delivery occurred, the wrong values would sometimes be logged.
3391 (Whenever a remote delivery process finished, the return path value from
3392 the most recently started remote delivery process was logged.)
3394 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3395 lines when AUTH and/or TLS are in use. This is the "received protocol"
3396 field. Exim used to use "asmtp" for authenticated SMTP, without any
3397 indication (in the protocol name) for TLS use. Now it follows the RFC and
3398 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3399 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3400 names appear in log lines as well as in Received: header lines.
3402 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3403 extensions, and comparison tests, and to fix some bugs.
3405 14. Changes to the "personal" filter test:
3407 (1) The test was buggy in that it was just doing the equivalent of
3408 "contains" tests on header lines. For example, if a user's address was
3409 anne@some.where, the "personal" test would incorrectly be true for
3411 To: susanne@some.where
3413 This test is now done by extracting each address from the header in turn,
3414 and checking the entire address. Other tests that are part of "personal"
3415 are now done using regular expressions (for example, to check local parts
3416 of addresses in From: header lines).
3418 (2) The list of non-personal local parts in From: addresses has been
3419 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3420 taken from the Sieve specification recommendations.
3422 (3) If the message contains any header line starting with "List-" it is
3423 treated as non-personal.
3425 (4) The test for "circular" in the Subject: header line has been removed
3426 because it now seems ill-conceived.
3428 15. Minor typos in src/EDITME comments corrected.
3430 16. Installed latest exipick from John Jetmore.
3432 17. If headers_add on a router specified a text string that was too long for
3433 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3434 of string_sprintf() is now avoided.
3436 18. $message_body_size was not set (it was always zero) when running the DATA
3437 ACL and the local_scan() function.
3439 19. For the "mail" command in an Exim filter, no default was being set for
3440 the once_repeat time, causing a random time value to be used if "once" was
3441 specified. (If the value happened to be <= 0, no repeat happened.) The
3442 default is now 0s, meaning "never repeat". The "vacation" command was OK
3443 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3444 (I found it when inspecting the code).
3446 20. There is now an overall timeout for performing a callout verification. It
3447 defaults to 4 times the callout timeout, which applies to individual SMTP
3448 commands during the callout. The overall timeout applies when there is more
3449 than one host that can be tried. The timeout is checked before trying the
3450 next host. This prevents very long delays if there are a large number of
3451 hosts and all are timing out (e.g. when the network connections are timing
3452 out). The value of the overall timeout can be changed by specifying an
3453 additional sub-option for "callout", called "maxwait". For example:
3455 verify = sender/callout=5s,maxwait=20s
3457 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3458 to the end before writing, but this should make it even safer).
3460 22. Exim was forgetting that it had advertised PIPELINING for the second and
3461 subsequent messages on an SMTP connection. It was also not resetting its
3462 memory on STARTTLS and an internal HELO.
3464 23. When Exim logs an SMTP synchronization error within a session, it now
3465 records whether PIPELINING has been advertised or not.
3467 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3468 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3469 rather than long int.
3471 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3473 26. Added the never_mail option to autoreply.
3476 Exim version 4.41
3477 -----------------
3479 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3480 crash if the getsockname() call failed; this can happen if a connection is
3481 closed very soon after it is established. The problem was simply in the
3482 order in which certain operations were done, causing Exim to try to write
3483 to the SMTP stream before it had set up the file descriptor. The bug has
3484 been fixed by making things happen in the correct order.
3487 Exim version 4.40
3488 -----------------
3490 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3491 before the connection was closed, thus losing the rejection response.
3493 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3494 some early Solaris releases, but causes trouble in current releases where
3495 socklen_t is defined.
3497 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3498 always exist.
3500 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3501 configured.
3503 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3504 that releasing the top of it at the end releases what was used for sub-
3505 expansions (unless the block got too big). However, discard this block if
3506 the first thing is a variable or header, so that we can use its block when
3507 it is dynamic (useful for very large $message_headers, for example).
3509 6. Lookups now cache *every* query, not just the most recent. A new, separate
3510 store pool is used for this. It can be recovered when all lookup caches are
3511 flushed. Lookups now release memory at the end of their result strings.
3512 This has involved some general refactoring of the lookup sources.
3514 7. Some code has been added to the store_xxx() functions to reduce the amount
3515 of flapping under certain conditions.
3517 8. log_incoming_interface used to affect only the <= reception log lines. Now
3518 it causes the local interface and port to be added to several more SMTP log
3519 lines, for example "SMTP connection from", and rejection lines.
3521 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3523 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3525 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3526 could be overwritten at the end of the current message (or the start of a
3527 new message if it was set in a HELO ACL). The value is now preserved for
3528 the duration of the SMTP connection.
3530 12. If a transport had a headers_rewrite setting, and a matching header line
3531 contained an unqualified address, that address was qualified, even if it
3532 did not match any rewriting rules. The underlying bug was that the values
3533 of the flags that permit the existence of unqualified sender and recipient
3534 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3535 non-local messages, and by -bnq for local messages) were not being
3536 preserved with the message after it was received.
3538 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3539 "next input=" as part of the text comprising the host identity instead of
3540 the correct text. The code was using the same buffer for two different
3541 strings. However, depending on which order the printing function evaluated
3542 its arguments, the bug did not always show up. Under Linux, for example, my
3543 test suite worked just fine.
3545 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3546 doesn't work with some older versions of Perl. It has been changed to "my",
3547 which in any case is probably the better facility to use.
3549 15. A really picky compiler found some instances of statements for creating
3550 error messages that either had too many or two few arguments for the format
3551 string.
3553 16. The size of the buffer for calls to the DNS resolver has been increased
3554 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3555 for addresses that have a lot of PTR records. This alleviates a problem; it
3556 does not fully solve it.
3558 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3559 buffer now truncates the list and logs the incident, which is the same
3560 action as happens when Exim is looking up a host name and its aliases.
3561 Previously in this situation something unpredictable would happen;
3562 sometimes it was "internal error: store_reset failed".
3564 18. If a server dropped the connection unexpectedly when an Exim client was
3565 using GnuTLS and trying to read a response, the client delivery process
3566 crashed while trying to generate an error log message.
3568 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3569 string, for example:
3571 warn message = H1: something\nH2: something
3573 the text was added as a single header line from Exim's point of view
3574 though it ended up OK in the delivered message. However, searching for the
3575 second and subsequent header lines using $h_h2: did not work. This has been
3576 fixed. Similarly, if a system filter added multiple headers in this way,
3577 the routers could not see them.
3579 20. Expanded the error message when iplsearch is called with an invalid key to
3580 suggest using net-iplsearch in a host list.
3582 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3583 ACLs are no longer actually imposed (and a message to that effect is
3584 output).
3586 22. If a "gecos" field in a passwd entry contained escaped characters, in
3587 particular, if it contained a \" sequence, Exim got it wrong when building
3588 a From: or a Sender: header from that name. A second bug also caused
3589 incorrect handling when an unquoted " was present following a character
3590 that needed quoting.
3592 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3593 was not being matched caselessly.
3595 24. Arranged for all hyphens in the exim.8 source to be escaped with
3596 backslashes.
3598 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3599 properly. Recipient callout cache records were still being keyed to include
3600 the sender, even when use_sender was set false. This led to far more
3601 callouts that were necessary. The sender is no longer included in the key
3602 when use_sender is false.
3604 26. Added "control = submission" modifier to ACLs.
3606 27. Added the ${base62d: operator to decode base 62 numbers.
3608 28. dnsdb lookups can now access SRV records.
3610 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3611 the configuration file.
3613 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3614 (-v) mode. This makes the output for a verbose queue run more intelligible.
3616 31. Added a use_postmaster feature to recipient callouts.
3618 32. Added the $body_zerocount variable, containing the number of binary zero
3619 bytes in the message body.
3621 33. The time of last modification of the "new" subdirectory is now used as the
3622 "mailbox time last read" when there is a quota error for a maildir
3623 delivery.
3625 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3627 35. Added +ignore_unknown as a special item in host lists.
3629 36. Code for decoding IPv6 addresses in host lists is now included, even if
3630 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3631 address was recognized as an IP address, but was then not correctly decoded
3632 into binary, causing unexpected and incorrect effects when compared with
3633 another IP address.
3636 Exim version 4.34
3637 -----------------
3639 1. Very minor rewording of debugging text in manualroute to say "list of
3640 hosts" instead of "hostlist".
3642 2. If verify=header_syntax was set, and a header line with an unqualified
3643 address (no domain) and a large number of spaces between the end of the
3644 name and the colon was received, the reception process suffered a buffer
3645 overflow, and (when I tested it) crashed. This was caused by some obsolete
3646 code that should have been removed. The fix is to remove it!
3648 3. When running in the test harness, delay a bit after writing a bounce
3649 message to get a bit more predictability in the log output.
3651 4. Added a call to search_tidyup() just before forking a reception process. In
3652 theory, someone could use a lookup in the expansion of smtp_accept_max_
3653 per_host which, without the tidyup, could leave open a database connection.
3655 5. Added the variables $recipient_data and $sender_data which get set from a
3656 lookup success in an ACL "recipients" or "senders" condition, or a router
3657 "senders" option, similar to $domain_data and $local_part_data.
3659 6. Moved the writing of debug_print from before to after the "senders" test
3660 for routers.
3662 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3663 problems for message scanning, either using a data ACL, or using
3664 local_scan() because the Received: header was not generated till after they
3665 were called (in order to set the time as the time of reception completion).
3666 I have revised the way this works. The header is now generated after the
3667 body is received, but before the ACL or local_scan() are called. After they
3668 are run, the timestamp in the header is updated.
3671 Exim version 4.33
3672 -----------------
3674 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3675 before starting a queue runner without re-exec. This happened only when
3676 deliver_drop_privilege was set or when the Exim user was set to root. The
3677 effect of the bug was that timeouts during subsequent deliveries caused
3678 crashes instead of being properly handled. The handler is now left at its
3679 default (and expected) setting.
3681 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3682 message, again when deliver_drop_privilege is set or Exim is run as root.
3683 The bug described in (1) was not present in this case, but the tidying up
3684 of the other signals was missing. I have made the two cases consistent.
3686 3. The ignore_target_hosts setting on a manualroute router was being ignored
3687 for hosts that were looked up using the /MX notation.
3689 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3690 in domain lists.
3692 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3693 operated on the sender address. After changing the $sender_address to <>
3694 for the sender address verify, Exim was re-instated it as the original
3695 (before rewriting) address, but remembering that it had rewritten it, so it
3696 wasn't rewriting it again. This bug also had the effect of breaking the
3697 sender address verification caching when the sender address was rewritten.
3699 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3700 This has been changed so that if the ip literal address matches
3701 ignore_target_hosts, the router declines.
3703 7. Added expansion conditions match_domain, match_address, and match_local_
3704 part (NOT match_host).
3706 8. The placeholder for the Received: header didn't have a length field set.
3708 9. Added code to Exim itself and to exim_lock to test for a specific race
3709 condition that could lead to file corruption when using MBX delivery. The
3710 issue is with the lockfile that is created in /tmp. If this file is removed
3711 after a process has opened it but before that process has acquired a lock,
3712 there is the potential for a second process to recreate the file and also
3713 acquire a lock. This could lead to two Exim processes writing to the file
3714 at the same time. The added code performs the same test as UW imapd; it
3715 checks after acquiring the lock that its file descriptor still refers to
3716 the same named file.
3718 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3719 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3720 when Exim is built.
3722 11. Added the smtp_active_hostname option. If used, this will typically be made
3723 to depend on the incoming interface address. Because $interface_address is
3724 not set up until the daemon has forked a reception process, error responses
3725 that can happen earlier (such as "too many connections") no longer contain
3726 a host name.
3728 12. If an expansion in a condition on a "warn" statement fails because a lookup
3729 defers, the "warn" statement is abandoned, and the next ACL statement is
3730 processed. Previously this caused the whole ACL to be aborted.
3732 13. Added the iplsearch lookup type.
3734 14. Added ident_timeout as a log selector.
3736 15. Added tls_certificate_verified as a log selector.
3738 16. Added a global option tls_require_ciphers (compare the smtp transport
3739 option of the same name). This controls incoming TLS connections.
3741 17. I finally figured out how to make tls_require_ciphers do a similar thing
3742 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3743 before starting the TLS session.
3745 18. Tabs are now shown as \t in -bP output.
3747 19. If the log selector return_path_on_delivery was set, Exim crashed when
3748 bouncing a message because it had too many Received: header lines.
3750 20. If two routers both had headers_remove settings, and the first one included
3751 a superfluous trailing colon, the final name in the first list and the
3752 first name in the second list were incorrectly joined into one item (with a
3753 colon in the middle).
3756 Exim version 4.32
3757 -----------------
3759 1. Added -C and -D options to the exinext utility, mainly to make it easier
3760 to include in the automated testing, but these could be helpful when
3761 multiple configurations are in use.
3763 2. The exinext utility was not formatting the output nicely when there was
3764 an alternate port involved in the retry record key, nor when there was a
3765 message id as well (for retries that were specific to a specific message
3766 and a specific host). It was also confused by IPv6 addresses, because of
3767 the additional colons they contain. I have fixed the IPv4 problem, and
3768 patched it up to do a reasonable job for IPv6.
3770 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3771 delivery, the log line now contains "pipelined" if PIPELINING was used.
3773 4. An SMTP transport process used to panic and die if the bind() call to set
3774 an explicit outgoing interface failed. This has been changed; it is now
3775 treated in the same way as a connect() failure.
3777 5. A reference to $sender_host_name in the part of a conditional expansion
3778 that was being skipped was still causing a DNS lookup. This no longer
3779 occurs.
3781 6. The def: expansion condition was not recognizing references to header lines
3782 that used bh_ and bheader_.
3784 7. Added the _cache feature to named lists.
3786 8. The code for checking quota_filecount in the appendfile transport was
3787 allowing one more file than it should have been.
3789 9. For compatibility with Sendmail, the command line option
3791 -prval:sval
3793 is equivalent to
3795 -oMr rval -oMs sval
3797 and sets the incoming protocol and host name (for trusted callers). The
3798 host name and its colon can be omitted when only the protocol is to be set.
3799 Note the Exim already has two private options, -pd and -ps, that refer to
3800 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3801 "s", but I don't think that's a major issue.
3803 10. A number of refactoring changes to the code, none of which should affect
3804 Exim's behaviour:
3806 (a) The number of logging options was getting close to filling up the
3807 32-bit word that was used as a bit map. I have split them into two classes:
3808 those that are passed in the argument to log_write(), and those that are
3809 only ever tested independently outside of that function. These are now in
3810 separate 32-bit words, so there is plenty of room for expansion again.
3811 There is no change in the user interface or the logging behaviour.
3813 (b) When building, for example, log lines, the code previously used a
3814 macro that called string_cat() twice, in order to add two strings. This is
3815 not really sufficiently general. Furthermore, there was one instance where
3816 it was actually wrong because one of the argument was used twice, and in
3817 one call a function was used. (As it happened, calling the function twice
3818 did not affect the overall behaviour.) The macro has been replaced by a
3819 function that can join an arbitrary number of extra strings onto a growing
3820 string.
3822 (c) The code for expansion conditions now uses a table and a binary chop
3823 instead of a serial search (which was left over from when there were very
3824 few conditions). Also, it now recognizes conditions like "pam" even when
3825 the relevant support is not compiled in: a suitably worded error message is
3826 given if an attempt is made to use such a condition.
3828 11. Added ${time_interval:xxxxx}.
3830 12. A bug was causing one of the ddress fields not to be passed back correctly
3831 from remote delivery subprocesses. The field in question was not being
3832 subsequently used, so this caused to problems in practice.
3834 13. Added new log selectors queue_time and deliver_time.
3836 14. Might have fixed a bug in maildirsizefile handling that threw up
3837 "unexpected character" debug warnings, and recalculated the data
3838 unnecessarily. In any case, I expanded the warning message to give more
3839 information.
3841 15. Added the message "Restricted characters in address" to the statements in
3842 the default ACL that block characters like @ and % in local parts.
3844 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3845 Three changes have been made:
3847 (a) There was a serious bug; a negative response to MAIL caused the whole
3848 recipient domain to be cached as invalid, thereby blocking all messages
3849 to all local parts at the same domain, from all senders. This bug has
3850 been fixed. The domain is no longer cached after a negative response to
3851 MAIL if the sender used is not empty.
3853 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3854 been restored.
3856 (c) A new callout option, "use_sender" has been added for people who want
3857 the modified behaviour.
3860 Exim version 4.31
3861 -----------------
3863 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3864 Larry Rosenman.
3866 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3867 indeed breaks things for older releases.
3869 3. Added additional logging to the case where there is a problem reading data
3870 from a filter that is running in a subprocess using a pipe, in order to
3871 try to track down a specific problem.
3873 4. Testing facility fudge: when running in the test harness and attempting
3874 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3875 getting "No route to host". Convert this to a timeout.
3877 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3878 warning.
3880 6. Some OS don't have socklen_t but use size_t instead. This affects the
3881 fifth argument of getsockopt() amongst other things. This is now
3882 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3883 can be set for individual OS. I have set it for SunOS5, OSF1, and
3884 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3885 some earlier ones do not.
3887 7. Change 4.30/15 was not doing the test caselessly.
3889 8. The standard form for an IPv6 address literal was being rejected by address
3890 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3891 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3892 this, as well as the form without the "IPv6" on the front (but only when
3893 address literals are enabled, of course).
3895 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3897 10. Exim crashed if a message with an empty sender address specified by -f
3898 encountered a router with an errors_to setting. This could be provoked only
3899 by a command such as
3901 exim -f "" ...
3903 where an empty string was supplied; "<>" did not hit this bug.
3905 11. Installed PCRE release 4.5.
3907 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3908 remained set. It is now erased.
3910 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3911 times from message ids (which are base 36 rather than the normal 62).
3913 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3914 were being counted as actual protocol errors, and logged if the log
3915 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3916 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3917 and DATA following a set of rejected RCPTs do not count as protocol errors.
3918 In other words, Exim assumes they were pipelined, though this may not
3919 actually be the case. Of course, in all cases the client gets an
3920 appropriate error code.
3922 15. If a lookup fails in an ACL condition, a message about the failure may
3923 be available; it is used if testing the ACL cannot continue, because most
3924 such messages specify what the cause of the deferral is. However, some
3925 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3926 that caused an old message to be retained and used if a later statement
3927 caused a defer, replacing the real cause of the deferral.
3929 16. If an IP address had so many PTR records that the DNS lookup buffer
3930 was not large enough to hold them, Exim could crash while trying to process
3931 the truncated data. It now detects and logs this case.
3933 17. Further to 4.21/58, another change has been made: if (and only if) the
3934 first line of a message (the first header line) ends with CRLF, a bare LF
3935 in a subsequent header line has a space inserted after it, so as not to
3936 terminate the header.
3938 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3939 unnecessarily, used atoi() instead of strtol(), and didn't check the
3940 termination when getting file sizes from file names by regex.
3942 19. Completely re-implemented the support for maildirsize files, in the light
3943 of a number of problems with the previous contributed implementation
3944 (4.30/29). In particular:
3946 . If the quota is zero, the maildirsize file is maintained, but no quota is
3947 imposed.
3949 . If the maildir directory does not exist, it is created before any attempt
3950 to write a maildirsize file.
3952 . The quota value in the file is just a cache; if the quota is changed in
3953 the transport, the new value overrides.
3955 . A regular expression is available for excluding directories from the
3956 count.
3958 20. The autoreply transport checks the characters in options that define the
3959 message's headers; it allows continued headers, but it was checking with
3960 isspace() after an embedded newline instead of explicitly looking for a
3961 space or a tab.
3963 21. If all the "regular" hosts to which an address was routed had passed their
3964 expiry times, and had not reached their retry times, the address was
3965 bounced, even if fallback hosts were defined. Now Exim should go on to try
3966 the fallback hosts.
3968 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3969 equivalent code in the SMTP transport. Some hosts send humungous responses
3970 to HELO/EHLO, more than 1024 it seems.
3972 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3973 gives compiler warnings in some environments. I've now done it "properly",
3974 using a union.
3976 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3977 (because of problems with the built-in one) was declared to return uschar *
3978 instead of char *, causing compiler failure.
3980 25. Fixed a file descriptor leak when processing alias/forward files.
3982 26. Fixed a minor format string issue in dbfn.c.
3984 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3986 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3987 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3988 become corrupted.
3990 29. When a sender address is verified, it is cached, to save repeating the test
3991 when there is more than one recipient in a message. However, when the
3992 verification involves a callout, it is possible for different callout
3993 options to be set for different recipients. It is too complicated to keep
3994 track of this in the cache, so now Exim always runs a verification when a
3995 callout is required, relying on the callout cache for the optimization.
3996 The overhead is duplication of the address routing, but this should not be
3997 too great.
3999 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4000 to be verified with callout=postmaster, and the main callout worked but the
4001 postmaster check failed, the verification correctly failed. However, if a
4002 subsequent RCPT command asked for sender verification *without* the
4003 postmaster check, incorrect caching caused this verification also to fail,
4004 incorrectly.
4006 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4007 it was not caching the DNS options (qualify_single, search_parents) that
4008 were used when the lookup failed. A subsequent lookup with different
4009 options therefore always gave the same answer, though there were cases
4010 where it should not have. (Example: a "domains = !$mx_any" option on a
4011 dnslookup router: the "domains" option is always processed without any
4012 widening, but the router might have qualify_single set.) Now Exim uses the
4013 cached value only when the same options are set.
4015 32. Added John Jetmore's "exipick" utility to the distribution.
4017 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4018 than a timeout (e.g. a certificate is required, and is not provided), an
4019 Exim server now closes the connection immediately. Previously it waited for
4020 the client to close - but if the client is SSL, it seems that they each
4021 wait for each other, leading to a delay before one of them times out.
4023 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4024 maintained 0.8.x compatibility because I don't think many are using it, and
4025 it is clearly obsolete.
4027 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4028 transport.
4030 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4031 client certificate was expired. A simple patch fixes this, though I don't
4032 understand the full logic of why the verify callback is called multiple
4033 times.
4035 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4036 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4037 which causes problems with some clients (such as the Certicom SSL Plus
4038 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4039 disables the coutermeasure allowing Eudora to connect."
4041 38. Exim was not checking that a write() to a log file succeeded. This could
4042 lead to Bad Things if a log got too big, in particular if it hit a file
4043 size limit. Exim now panics and dies if it cannot write to a log file, just
4044 as it does if it cannot open a log file.
4046 39. Modified OS/Makefile-Linux so that it now contains
4050 The two -D definitions ensure that Exim is compiled with large file
4051 support, which makes it possible to handle log files that are bigger than
4052 2^31.
4054 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4055 instance) a domain was checked against a named list that involved a lookup,
4056 causing $domain_data to be set, then another domain was checked against the
4057 same list, then the first domain was re-checked, the value of $domain_data
4058 after the final check could be wrong. In particular, if the second check
4059 failed, it could be set empty. This bug probably also applied to
4060 $localpart_data.
4062 41. The strip_trailing_dot option was not being applied to the address given
4063 with the -f command-line option.
4065 42. The code for reading a message's header from the spool was incrementing
4066 $received_count, but never initializing it. This meant that the value was
4067 incorrect (doubled) while delivering a message in the same process in which
4068 it was received. In the most common configuration of Exim, this never
4069 happens - a fresh exec is done - but it can happen when
4070 deliver_drop_privilege is set.
4072 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4073 it now includes up to 150 characters of the unexpected data in the log
4074 line.
4076 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4077 and building data strings. The size of both of these buffers was 10 000
4078 bytes - far larger than anybody would *ever* want, thought I. Needless to
4079 say, somebody hit the limit. I have increased the maximum line length to
4080 20 000 and the maximum data length of concatenated lines to 100 000. I have
4081 also fixed two bugs, because there was no checking on these buffers. Tsk,
4082 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4083 buffer is too small.
4085 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4086 lsearch lookups. Now it does.
4088 46. When parsing a route_list item in a manualroute router, a fixed-length
4089 buffer was used for the list of hosts. I made this 1024 bytes long,
4090 thinking that nobody would ever have a list of hosts that long. Wrong.
4091 Somebody had a whole pile of complicated expansion conditions, and the
4092 string was silently truncated, leading to an expansion error. It turns out
4093 that it is easier to change to an unlimited length (owing to other changes
4094 that have happened since this code was originally written) than to build
4095 structure for giving a limitation error. The length of the item that
4096 expands into the list of hosts is now unlimited.
4098 47. The lsearch lookup could not handle data where the length of text line was
4099 more than 4095 characters. Such lines were truncated, leading to shortened
4100 data being returned. It should now handle lines of any length.
4102 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4103 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4104 ACL").
4106 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4107 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4108 no longer happens in comment lines. A list of replacements is now placed
4109 at the head of all of the source files, except those whose only change is
4110 to replace PERL_COMMAND in the very first #! line.
4112 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4113 messages on the queue, with a bottom-up merge sort, using code contributed
4114 by Michael Haardt. This should make operations like -bp somewhat faster on
4115 large queues. It won't affect queue runners, except when queue_run_in_order
4116 is set.
4118 51. Installed eximstats 1.31 in the distribution.
4120 52. Added support for SRV lookups to the dnslookup router.
4122 53. If an ACL referred to $message_body or $message_body_end, the value was not
4123 reset for any messages that followed in the same SMTP session.
4125 54. The store-handling optimization for building very long strings was not
4126 differentiating between the different store pools. I don't think this
4127 actually made any difference in practice, but I've tidied it.
4129 55. While running the routers to verify a sender address, $sender_address
4130 was still set to the sender address. This is wrong, because when routing to
4131 send a bounce to the sender, it would be empty. Therefore, I have changed
4132 it so that, while verifying a sender address, $sender_address is set to <>.
4133 (There is no change to what happens when verifying a recipient address.)
4135 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4136 target A or AAAA records (if not already returned) without resetting the
4137 qualify_single or search_parents options of the DNS resolver. These are
4138 inappropriate in this case because the targets of MX and SRV records must
4139 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4140 target that, when qualified, matched something in the local domain. These
4141 two options are now turned off when doing these lookups.
4143 57. It seems that at least some releases of Reiserfs (which does not have the
4144 concept of a fixed number of inodes) returns zero and not -1 for the
4145 number of available inodes. This interacted badly with check_spool_inodes,
4146 which assumed that -1 was the "no such thing" setting. What I have done is
4147 to check that the total number of inodes is greater than zero before doing
4148 the test of how many are available.
4150 58. When a "warn" ACL statement has a log_message modifier, the message is
4151 remembered, and not repeated. This is to avoid a lot of repetition when a
4152 message has many recipients that cause the same warning to be written.
4153 Howewer, Exim was preserving the list of already written lines for an
4154 entire SMTP session, which doesn't seem right. The memory is now reset if a
4155 new message is started.
4157 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4158 debugging output unless log_rewrite was also set.
4160 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4161 of (int)(handle) when we know that handle contains (void *)(-1).
4163 61. The Exim daemon panic-logs an error return when it closes the incoming
4164 connection. However "connection reset by peer" seems to be common, and
4165 isn't really an error worthy of noting specially, so that particular error
4166 is no long logged.
4168 62. When Exim is trying to find all the local interfaces, it used to panic and
4169 die if the ioctl to get the interface flags failed. However, it seems that
4170 on at least one OS (Solaris 9) it is possible to have an interface that is
4171 included in the list of interfaces, but for which you get a failure error
4172 for this call. This happens when the interface is not "plumbed" into a
4173 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4174 failure of the "get flags" call assumes that the interface is down.
4176 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4177 makes life easier for people who are doing arithmetic on fields extracted
4178 from dates, where you often get leading zeros that should not be
4179 interpreted as octal.
4181 64. Added qualify_domain to the redirect router, to override the global
4182 setting.
4184 65. If a pathologically long header line contained very many addresses (the
4185 report of this problem mentioned 10 000) and each of them was rewritten,
4186 Exim could use up a very large amount of memory. (It kept on making new
4187 copies of the header line as it rewrote, and never released the old ones.)
4188 At the expense of a bit more processing, the header rewriting function has
4189 been changed so that it no longer eats memory in this way.
4191 66. The generation of the Received: header has been moved from the time that a
4192 message starts to be received, to the time that it finishes. The timestamp
4193 in the Received: header should now be very close to that of the <= log
4194 line. There are two side-effects of this change:
4196 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4197 logged header lines no longer include the local Received: line, because
4198 it has not yet been created. The same applies to a copy of the message
4199 that is returned to a non-SMTP sender when a message is rejected.
4201 (b) When a filter file is tested using -bf, no additional Received: header
4202 is added to the test message. After some thought, I decided that this
4203 is a bug fix.
4205 This change does not affect the value of $received_for. It is still set
4206 after address rewriting, but before local_scan() is called.
4208 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4210 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4211 gave an unhelpful panic error message, and a defer error. I have managed to
4212 change this behaviour so that it now rejects any supplied certificate,
4213 which seems right, as the list of acceptable certificates is empty.
4215 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4216 gave an unhelpful defer error. I have not managed to make this reject any
4217 supplied certificates, but the error message it gives is "no certificate
4218 supplied", which is not helpful.
4220 70. exigrep's output now also includes lines that are not associated with any
4221 message, but which match the given pattern. Implemented by a patch from
4222 Martin Sluka, which also tidied up the Perl a bit.
4224 71. Recipient callout verification, like sender verification, was using <> in
4225 the MAIL FROM command. This isn't really the right thing, since the actual
4226 sender may affect whether the remote host accepts the recipient or not. I
4227 have changed it to use the actual sender in the callout; this means that
4228 the cache record is now keyed on a recipient/sender pair, not just the
4229 recipient address. There doesn't seem to be a real danger of callout loops,
4230 since a callout by the remote host to check the sender would use <>.
4231 [SEE ABOVE: changed after hitting problems.]
4233 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4234 temporary errors. However, in the case of such a code being given after
4235 the end of a data transmission (i.e. after ".") Exim was failing to write
4236 a retry record for the message. (Yes, there was some broken host that was
4237 actually sending 8xx at this point.)
4239 73. An unknown lookup type in a host list could cause Exim to panic-die when
4240 the list was checked. (An example that provoked this was putting <; in the
4241 middle of a list instead of at the start.) If this happened during a DATA
4242 ACL check, a -D file could be left lying around. This kind of configuration
4243 error no longer causes Exim to die; instead it causes a defer errror. The
4244 incident is still logged to the main and panic logs.
4246 74. Buglet left over from Exim 3 conversion. The message "too many messages
4247 in one connection" was written to the rejectlog but not the mainlog, except
4248 when address rewriting (yes!) was being logged.
4250 75. Added write_rejectlog option.
4252 76. When a system filter was run not as root (that is, when system_filter_user
4253 was set), the values of the $n variables were not being returned to the
4254 main process; thus, they were not subsequently available in the $sn
4255 variables.
4257 77. Added +return_path_on_delivery log selector.
4259 78. A connection timeout was being treated differently from recipients deferred
4260 when testing hosts_max_try with a message that was older than the host's
4261 retry timeout. (The host should not be counted, thus allowing all hosts to
4262 be tried at least once before bouncing.) This may have been the cause of an
4263 occasionally reported bug whereby a message would remain on the queue
4264 longer than the retry timeout, but would be bounced if a delivery was
4265 forced. I say "may" because I never totally pinned down the problem;
4266 setting up timeout/retry tests is difficult. See also the next item.
4268 79. The ultimate address timeout was not being applied to errors that involved
4269 a combination of host plus message (for example, a timeout on a MAIL
4270 command). When an address resolved to a number of possible hosts, and they
4271 were not all tried for each delivery (e.g. because of hosts_max_try), a
4272 message could remain on the queue longer than the retry timeout.
4274 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4275 Haardt.
4277 81. Fixed an obscure SMTP outgoing bug which required at least the following
4278 conditions: (a) there was another message waiting for the same server;
4279 (b) the server returned 5xx to all RCPT commands in the first message so
4280 that the message was not completed; (c) the server dropped the connection
4281 or gave a negative response to the RSET that Exim sends to abort the
4282 transaction. The observed case was a dropped connection after DATA that had
4283 been sent in pipelining mode. That is, the server had advertised PIPELINING
4284 but was not implementing it correctly. The effect of the bug was incorrect
4285 behaviour, such as trying another host, and this could lead to a crash.
4288 Exim version 4.30
4289 -----------------
4291 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4292 and daemon.c were passed as pointers to ints; they should have been
4293 pointers to socklen_t variables (which are typically unsigned ints).
4295 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4296 fixed.
4298 3. Fixed a really odd bug that affected only the testing scheme; patching a
4299 certain fixed string in the binary changed the value of another string that
4300 happened to be identical to the end of the original first string.
4302 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4303 name", it returns that address as the IP address. On some operating
4304 systems (e.g. Solaris), it also passes back the IP address string as the
4305 "host name". However, on others (e.g. Linux), it passes back an empty
4306 string. Exim wasn't checking for this, and was changing the host name to an
4307 empty string, assuming it had been canonicized.
4309 5. Although rare, it is permitted to have more than one PTR record for a given
4310 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4311 all the names associated with an address, because they do in Solaris.
4312 However, it seems that they do not in Linux for data that comes from the
4313 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4314 I found this out when I moved to a new Linux workstation and tried to run
4315 the Exim test suite.
4317 To get round this problem I have changed the code so that it now does its
4318 own call to the DNS to look up PTR records when searching for a host name.
4319 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4320 addresses that are only in /etc/hosts are still found.
4322 This behaviour is, however, controlled by an option called host_lookup_
4323 order, which defaults to "bydns:byaddr". If people want to use the other
4324 order, or indeed, just use one or the other means of lookup, they can
4325 specify it in this variable.
4327 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4328 some operating systems, this comes back from gethostbyaddr() as an empty
4329 string, and this is what Exim used to test for. However, it seems that in
4330 other systems, "." is yielded. Exim now tests for this case too.
4332 7. The values of check_spool_space and check_log_space are now held internally
4333 as a number of kilobytes instead of an absolute number of bytes. If a
4334 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4335 kilobyte. This means that much larger values can be stored.
4337 8. Exim monitor: an attempt to get the action menu when not actually pointing
4338 at a message produces an empty menu entitled "No message selected". This
4339 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4340 no entries in it ("Shell widget menu has zero width and/or height"). So I
4341 have added a single, blank menu entry in this case.
4343 9. Added ${quote_local_part.
4345 10. MIME decoding is now applied to the contents of Subject: header lines when
4346 they are logged.
4348 11. Now that a reference to $sender_host_address automatically causes a reverse
4349 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4350 host lookup before query-style lookups in lists that might use this
4351 variable. This has therefore been abolished, and the "net-" prefix is no
4352 longer necessary for query-style lookups.
4354 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4355 have been a typo for LFLAGS, so it has been changed.
4357 13. The install script calls Exim with "-C /dev/null" in order to find the
4358 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4359 to be output. Howeve, since Exim outputs its version number before the
4360 error, it didn't break the script. It just looked ugly. I fixed this by
4361 always allowing "-C /dev/null" if the caller is root.
4363 14. Ignore overlarge ACL variable number when reading spool file - insurance
4364 against a later release with more variables having written the file.
4366 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4367 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4368 this, as well as the form without the "IPv6" on the front.
4370 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4371 OS/Makefile-Darwin file.
4373 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4374 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4376 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4377 variable. However, some OS use ints for inodes. I've added cast to long int
4378 to get rid of the compiler warning.
4380 19. I had forgotten to lock out "/../" in configuration file names when
4381 ALT_CONFIG_PREFIX was set.
4383 20. Routers used for verification do not need to specify transports. However,
4384 if such a router generated a host list, and callout was configured, Exim
4385 crashed, because it could not find a port number from the (non-existent)
4386 transport. It now assumes port 25 in this circumstance.
4388 21. Added the -t option to exigrep.
4390 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4391 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4392 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4393 them is set, LOOKUP_LSEARCH is forced.
4395 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4397 24. Added sender and host information to the "rejected by local_scan()" log
4398 line; previously there was no indication of these.
4400 25. Added .include_if_exists.
4402 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4403 Linux. It turns out that not all file systems support this. Apparently some
4404 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4405 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4406 not supported on the file descriptor, is now ignored when Exim is trying to
4407 sync a directory. This applies only to Linux.
4409 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4411 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4412 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4413 this.
4415 29. Added support for maildirsize files from supplied patch (modified a bit).
4417 30. The use of :fail: followed by an empty string could lead Exim to respond to
4418 sender verification failures with (e.g.):
4420 550 Verification failed for <xxx>
4421 550 Sender verify failed
4423 where the first response line was missing the '-' that indicates it is not
4424 the final line of the response.
4426 31. The loop for finding the name of the user that called Exim had a hardwired
4427 limit of 10; it now uses the value of finduser_retries, which is used for
4428 all other user lookups.
4430 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4431 delivery time.
4433 33. Exim was neglecting to zero errno before one call of strtol() when
4434 expanding a string and expecting an integer value. On some systems this
4435 resulted in spurious "integer overflow" errors. Also, it was casting the
4436 result into an int without checking.
4438 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4439 did not work. The code looks as if it has *never* worked, though it appears
4440 to have been documented since at least releast 1.62. I have made it work.
4442 35. The "timeout_DNS" error in retry rules, also documented since at least
4443 1.62, also never worked. As it isn't clear exactly what this means, and
4444 clearly it isn't a major issue, I have abolished the feature by treating it
4445 as "timeout", and writing a warning to the main and panic logs.
4447 36. The display of retry rules for -brt wasn't always showing the error code
4448 correctly.
4450 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4451 timeout_connect_A, timeout_connect_MX.
4453 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4454 to the empty sender.
4456 39. The daemon was not analysing the content of -oX till after it had closed
4457 stderr and disconnected from the controlling terminal. This meant that any
4458 syntax errors were only noted on the panic log, and the return code from
4459 the command was 0. By re-arranging the code a little, I've made the
4460 decoding happen first, so such errors now appear on stderr, and the return
4461 code is 1. However, the actual setting up of the sockets still happens in
4462 the disconnected process, so errors there are still only recorded on the
4463 panic log.
4465 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4466 connections (as happens on some IP stacks) was logged at start up time as
4467 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4468 it from "IPv6 and IPv4", which means that two separate sockets are being
4469 used.
4471 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4472 says whether AF_INET or AF_INET6 was passed as an argument.
4474 42. Exiwhat output was messed up when time zones were included in log
4475 timestamps.
4477 43. Exiwhat now gives more information about the daemon's listening ports,
4478 and whether -tls-on-connect was used.
4480 44. The "port" option of the smtp transport is now expanded.
4482 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4483 silently ignored. Now an error message is written to the main and panic
4484 logs.
4486 46. There's a new ACL modifier called "logwrite" which writes to a log file
4487 as soon as it is encountered.
4489 47. Added $local_user_uid and $local_user_gid at routing time.
4491 48. Exim crashed when trying to verify a sender address that was being
4492 rewritten to "<>".
4494 49. Exim was recognizing only a space character after ".include". It now also
4495 recognizes a tab character.
4497 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4498 extracting the relevant information from the specification. The man page no
4499 longer contains scrambled data for the -d option, and I've added a section
4500 at the front about calling Exim under different names.
4502 51. Added "extra_headers" argument to the "mail" command in filter files.
4504 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4505 crash.
4507 53. Installed eximstats 1.29.
4509 54. Added transport_filter_timeout as a generic transport option.
4511 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4512 Cc: header lines. This was required by RFC 822, but it not required by RFC
4513 2822.
4515 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4516 incoming messages that did not have them. Now it does so only if the
4517 message originates locally, that is, if there is no associated remote host
4518 address. When Resent- header lines are present, this applies to the Resent-
4519 lines rather than the non-Resent- lines.
4521 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4522 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4524 58. Messages for configuration errors now include the name of the main
4525 configuration file - useful now that there may be more than one file in a
4526 list (.included file names were always shown).
4528 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4529 for those rare installations that do not start the daemon as root or run it
4530 setuid root. I've cut out the call to initgroups() if the daemon is not
4531 root at that time.
4533 60. The Exim user and group can now be bound into the binary as text strings
4534 that are looked up at the start of Exim's processing.
4536 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4538 62. Added $mailstore_basename variable.
4540 63. Installed patch to sieve.c from Michael Haardt.
4542 64. When Exim failed to open the panic log after failing to open the main log,
4543 the original message it was trying to log was written to stderr and debug
4544 output, but if they were not available (the usual case in production), it
4545 was lost. Now it is written to syslog before the two lines that record the
4546 failures to open the logs.
4548 65. Users' Exim filters run in subprocesses under the user's uid. It is
4549 possible for a "deliver" command or an alias in a "personal" command to
4550 provoke an address rewrite. If logging of address rewriting is configured,
4551 this fails because the process is not running as root or exim. There may be
4552 a better way of dealing with this, but for the moment (because 4.30 needs
4553 to be released), I have disabled address rewrite logging when running a
4554 filter in a non-root, non-exim process.
4557 Exim version 4.24
4558 -----------------
4560 1. The buildconfig auxiliary program wasn't quoting the value set for
4561 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4562 not defined. This bug was masked in 4.22 by the effect that was fixed in
4563 change 4.23/1.
4565 2. Some messages that were rejected after a message id was allocated were
4566 shown as "incomplete" by exigrep. It no longer does this for messages that
4567 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4569 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4570 have allow_domain_literals set, the ID did not get logged in the <= line.
4571 Domain literals are now always recognized in Message-ID: header lines.
4573 4. The first argument for a ${extract expansion item is the key name or field
4574 number. Leading and trailing spaces in this item were not being ignored,
4575 causing some misleading effects.
4577 5. When deliver_drop_privilege was set, single queue runner processes started
4578 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4579 same command in the process it spins off) were not dropping privilege.
4581 6. When the daemon running as "exim" started a queue runner, it always
4582 re-executed Exim in the spun-off process. This is a waste of effort when
4583 deliver_drop_privilege is set. The new process now just calls the
4584 queue-runner function directly.
4587 Exim version 4.23
4588 -----------------
4590 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4593 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4594 ignored. Though the use of -oP was forcing the writing of a pid file, it
4595 was always written to the default place.
4597 3. If the message "no IP address found for host xxxx" is generated during
4598 incoming verification, it is now followed by identification of the incoming
4599 connection (so you can more easily find what provoked it).
4601 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4603 5. Added some features to "harden" Exim a bit more against certain attacks:
4605 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4606 be put in Local/Makefile. This is like the never_users runtime option,
4607 but it cannot be overridden. The default setting is "root".
4609 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4610 prefix string with which any file named in a -C command line option
4611 must start.
4613 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4614 is retained for -C and -D only if the caller of Exim is root. Without
4615 it, the exim user may also use -C and -D and retain privilege.
4617 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4618 command line option is disabled.
4620 6. Macro names set by the -D option must start with an upper case letter, just
4621 like macro names defined in the configuration file.
4623 7. Added "dereference=" facility to LDAP.
4625 8. Two instances of the typo "uknown" in the source files are fixed.
4627 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4628 the Configure-Makefile script screwed up while processing it.
4630 10. Incorporated PCRE 4.4.
4632 11. The SMTP synchronization check was not operating right at the start of an
4633 SMTP session. For example, it could not catch a HELO sent before the client
4634 waited for the greeting. There is now a check for outstanding input at the
4635 point when the greeting is written. Because of the duplex, asynchronous
4636 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4637 way, but not yet received, when the check is performed.
4639 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4640 on TCP/IP sockets, because this apparently causes some broken clients to
4641 timeout.
4643 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4644 unchanged) from the Cygwin maintainer.
4646 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4647 was supported instead of testing for mbx. Effectively a typo.
4649 15. The spa authenticator server code was not checking that the input it
4650 received was valid base64.
4652 16. The debug output line for the "set" modifier in ACLs was not showing the
4653 name of the variable that was being set.
4655 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4657 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4658 lookup on its own. Something else was needed to trigger the lookup. For
4659 example, a match in host_lookup or the need for a host name in a host list.
4660 Now, if $sender_host_name is referenced and the host name has not yet been
4661 looked up, a lookup is performed. If the lookup fails, the variable remains
4662 empty, and $host_lookup_failed is set to "1".
4664 19. Added "eqi" as a case-independent comparison operator.
4666 20. The saslauthd authentication condition could segfault if neither service
4667 nor realm was specified.
4669 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4670 error message that was logged was misleading, and incoming SMTP
4671 connections were dropped. The message is now more accurate, and temporary
4672 errors are given to SMTP connections.
4674 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4675 (except RSET) with a 421 error, until QUIT is received. However, it was
4676 failing to send a response to QUIT.
4678 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4679 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4680 ACL is now run after the helo_try_verify_hosts code.
4682 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4683 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4684 case-independent, so other case variants are also recognized). Apparently
4685 some systems use these upper case variants.
4687 25. If more than two messages were waiting for the same host, and a transport
4688 filter was specified for the transport, Exim sent two messages over the
4689 same TCP/IP connection, and then failed with "socket operation on non-
4690 socket" when it tried to send the third.
4692 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4694 27. The extern definition of crypt16() in expand.c was not being excluded when
4695 the OS had its own crypt16() function.
4697 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4698 as a preferred synonym for return_size_limit, both as an option and as an
4699 expansion variable.
4701 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4703 30. Changed the default configuration ACL to relax the local part checking rule
4704 for addresses that are not in any local domains. For these addresses,
4705 slashes and pipe symbols are allowed within local parts, but the sequence
4706 /../ is explicitly forbidden.
4708 31. SPA server authentication was not clearing the challenge buffer before
4709 using it.
4711 32. log_message in a "warn" ACL statement was writing to the reject log as
4712 well as to the main log, which contradicts the documentation and doesn't
4713 seem right (because no rejection is happening). So I have stopped it.
4715 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4716 However, I am unable to do any testing of this.
4718 34. Fixed an infelicity in the appendfile transport. When checking directories
4719 for a mailbox, to see if any needed to be created, it was accidentally
4720 using path names with one or more superfluous leading slashes; tracing
4721 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4723 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4724 contents are added to the log line that is written for every discarded
4725 recipient. (Previously a log_message setting was ignored.)
4727 36. The ${quote: operator now quotes the string if it is empty.
4729 37. The install script runs exim in order to find its version number. If for
4730 some reason other than non-existence or emptiness, which it checks, it
4731 could not run './exim', it was installing it with an empty version number,
4732 i.e. as "exim-". This error state is now caught, and the installation is
4733 aborted.
4735 38. An argument was missing from the function that creates an error message
4736 when Exim fails to connect to the socket for saslauthd authentication.
4737 This could cause Exim to crash, or give a corrupted message.
4739 39. Added isip, isip4, and isip6 to ${if conditions.
4741 40. The ACL variables $acl_xx are now saved with the message, and can be
4742 accessed later in routers, transports, and filters.
4744 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4745 strings in the file are not string-expanded.
4747 42. If a MAIL command specified a SIZE value that was too large to fit into an
4748 int variable, the check against message_size_limit failed. Such values are
4749 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4750 day this will have to be increased, but I don't think I want to be around
4751 when emails are that large.
4755 Exim version 4.22
4756 -----------------
4758 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4759 iconv() is not standard in FreeBSD.
4761 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4762 IPv6 enabled. The observed symptom was a segmentation fault on return from
4763 the function os_common_find_running_interfaces() in src/os.c.
4765 3. In the check_special_case() function in daemon.c I had used "errno" as an
4766 argument name, which causes warnings on some systems. This was basically a
4767 typo, since it was named "eno" in the comments!
4769 4. The code that waits for the clock to tick (at a resolution of some fraction
4770 of a second) so as to ensure message-id uniqueness was always waiting for
4771 at least one whole tick, when it could have waited for less. [This is
4772 almost certainly not relevant at current processor speeds, where it is
4773 unlikely to ever wait at all. But we try to future-proof.]
4775 5. The function that sleeps for a time interval that includes fractions of a
4776 second contained a race. It did not block SIGALRM between setting the
4777 timer, and suspending (a couple of lines later). If the interval was short
4778 and the sigsuspend() was delayed until after it had expired, the suspension
4779 never ended. On busy systems this could lead to processes getting stuck for
4780 ever.
4782 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4783 process, before it forks any delivery processes. The open lookup caching
4784 mechanism meant that the open file or database connection was passed into
4785 the delivery process. The problem was that delivery processes always tidy
4786 up cached lookup data. This could cause a problem for the next delivery
4787 process started by the queue runner, because the external queue runner
4788 process does not know about the closure. So the next delivery process
4789 still has data in the lookup cache. In the case of a file lookup, there was
4790 no problem because closing a file descriptor in a subprocess doesn't affect
4791 the parent. However, if the lookup was caching a connection to a database,
4792 the connection was closed, and the second delivery process was likely to
4793 see errors such as "PGSQL: query failed: server closed the connection
4794 unexpectedly". The problem has been fixed by closing all cached lookups
4795 in a queue runner before running a delivery process.
4797 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4798 seem to have the "const" qualifier which it has on other OS. I've
4799 parameterised it.
4801 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4802 *of the same type* (client or server) with the same public name that an
4803 error should be diagnosed.
4805 9. When Exim looked up a host name for an IP address, but failed to find the
4806 original IP address when looking up the host name (a safety check), it
4807 output the message "<ip address> does not match any IP for NULL", which was
4808 confusing, to say the least. The bug was that the host name should have
4809 appeared instead of "NULL".
4811 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4812 user that is built into the binary, and the -C or -D options is used, root
4813 privilege is dropped before the configuration file is read. In addition,
4814 logging is switched to stderr instead of the normal log files. If the
4815 configuration then re-defines the Exim user, the unprivileged environment
4816 is probably not what is expected, so Exim logs a panic warning message (but
4817 proceeds).
4819 However, if deliver_drop_privilege is set, the unprivileged state may well
4820 be exactly what is intended, so the warning has been cut out in that case,
4821 and Exim is allowed to try to write to its normal log files.
4824 Exim version 4.21
4825 -----------------
4827 1. smtp_return_error_details was not giving details for temporary sender
4828 or receiver verification errors.
4830 2. Diagnose a configuration error if two authenticators have the same public
4831 name.
4833 3. Exim used not to create the message log file for a message until the first
4834 delivery attempt. This could be confusing when incoming messages were held
4835 for policy or load reasons. The message log file is now created at the time
4836 the message is received, and an initial "Received" line is written to it.
4838 4. The automatically generated man page for command line options had a minor
4839 bug that caused no ill effects; however, a more serious problem was that
4840 the procedure for building the man page automatically didn't always
4841 operate. Consequently, release 4.20 contains an out-of-date version. This
4842 shouldn't happen again.
4844 5. When building Exim with embedded Perl support, the script that builds the
4845 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4846 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4848 6. The freeze_tell option was not being used for messages that were frozen on
4849 arrival, either by an ACL or by local_scan().
4851 7. Added the smtp_incomplete_transaction log selector.
4853 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4854 was accepting AUTH without a new EHLO.
4856 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4857 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4858 RFC.
4860 10. Logging of TCP/IP connections (when configured) now happens in the main
4861 daemon process instead of the child process, so that the TCP/IP connection
4862 count is more accurate (but it can never be perfect).
4864 11. The use of "drop" in a nested ACL was not being handled correctly in the
4865 outer ACL. Now, if condition failure induced by the nested "drop" causes
4866 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4867 or "require"), the connection is dropped.
4869 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4870 that yield "discard" can now be used with an "accept" or a "discard" verb,
4871 but an error is generated for any others (because I can't see a useful way
4872 to define what should happen).
4874 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4875 are now processed in the same way as lines in the Exim configuration file.
4876 In particular, continuation lines are supported.
4878 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4880 15. Added -ti meaning -t -i.
4882 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4883 domains, and warn by logging if others are found.
4885 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4886 returned from GIFCONF when Exim is trying to find the list of interfaces on
4887 a host. The code in os.c has been modified to copy each ifreq to an aligned
4888 structure in all cases.
4890 Also, in some cases, the returned ifreq's were being copied to a 'struct
4891 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4892 means the last couple of bytes of an IPv6 address could be chopped if the
4893 ifreq contained only a normal sockaddr (14 bytes storage).
4895 18. Named domain lists were not supported in the hosts_treat_as_local option.
4896 An entry such as +xxxx was not recognized, and was treated as a literal
4897 domain name.
4899 19. Ensure that header lines added by a DATA ACL are included in the reject log
4900 if the ACL subsequently rejects the message.
4902 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4903 MD5 (which is deprecated).
4905 21. When testing a filter file using -bf, Exim was writing a message when it
4906 took the sender from a "From " line in the message, but it was not doing so
4907 when it took $return_path from a Return-Path: header line. It now does.
4909 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4910 with a valid header line field name (a series of printing characters
4911 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4913 23. Changed "disc" in the source to "disk" to conform to the documentation and
4914 the book and for uniformity.
4916 24. Ignore Sendmail's -Ooption=value command line item.
4918 25. When execve() failed while trying to run a command in a pipe transport,
4919 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4920 could be confused with a return value of 69 from the command itself. This
4921 has been changed to 127, the value the shell returns if it is asked to run
4922 a non-existent command. The wording for the related log line suggests a
4923 non-existent command as the problem.
4925 26. If received_header_text expands to an empty string, do not add a Received:
4926 header line to the message. (Well, it adds a token one on the spool, but
4927 marks it "old" so that it doesn't get used or transmitted.)
4929 27. Installed eximstats 1.28 (addition of -nt option).
4931 28. There was no check for failure on the call to getsockname() in the daemon
4932 code. This can fail if there is a shortage of resources on the system, with
4933 ENOMEM, for example. A temporary error is now given on failure.
4935 29. Contrary to the C standard, it seems that in some environments, the
4936 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4937 program. Exim now does this explicitly; it affects the formatting of
4938 timestamps using strftime().
4940 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4941 complaints. I've now initialized all the variables, to avoid this.
4943 32. Header lines added by a system filter were not being "seen" during
4944 transport-time rewrites.
4946 33. The info_callback() function passed to OpenSSL is set up with type void
4947 (*)(SSL *, int, int), as described somewhere. However, when calling the
4948 function (actually a macro) that sets it up, the type void(*)() is
4949 expected. I've put in a cast to prevent warnings from picky compilers.
4951 34. If a DNS black list lookup found a CNAME record, but there were no A
4952 records associated with the domain it pointed at, Exim crashed.
4954 35. If a DNS black list lookup returned more than one A record, Exim ignored
4955 all but the first. It now scans all returned addresses if a particular IP
4956 value is being sought. In this situation, the contents of the
4957 $dnslist_value variable are a list of all the addresses, separated by a
4958 comma and a space.
4960 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4961 to accept a host name and all its aliases if the forward lookup for any of
4962 them yielded the IP address of the incoming connection. Now it accepts only
4963 those names whose forward lookup yields the correct IP address. Any other
4964 names are discarded. This closes a loophole whereby a rogue DNS
4965 administrator could create reverse DNS records to break through a
4966 wildcarded host restriction in an ACL.
4968 37. If a user filter or a system filter that ran in a subprocess used any of
4969 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4970 the wrong values were passed to the pipe command ($thisaddress had the
4971 value of $0, $0 had the value of $1, etc). This bug was introduced by
4972 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4974 38. Improved the line breaking for long SMTP error messages from ACLs.
4975 Previously, if there was no break point between 40 and 75 characters, Exim
4976 left the rest of the message alone. Two changes have been made: (a) I've
4977 reduced the minimum length to 35 characters; (b) if it can't find a break
4978 point between 35 and 75 characters, it looks ahead and uses the first one
4979 that it finds. This may give the occasional overlong line, but at least the
4980 remaining text gets split now.
4982 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4983 file descriptors might be low, and that setting 1000 would always raise it.
4984 It turns out that in some environments, the limit is already over 1000 and
4985 that lowering it causes trouble. So now Exim takes care not to decrease it.