1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.632 2010/06/12 15:21:25 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PP/01 Date: & Message-Id: revert to normally being appended to a message,
10 only prepend for the Resent-* case. Fixes regression introduced in
11 Exim 4.70 by NM/22 for Bugzilla 607.
13 PP/02 Include check_rfc2047_length in configure.default because we're seeing
14 increasing numbers of administrators be bitten by this.
16 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
18 PP/03 Bugzilla 994: added openssl_options main configuration option.
20 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
22 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
24 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
26 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
27 without a peer certificate, leading to a segfault because of an
28 assumption that peers always have certificates. Be a little more
29 paranoid. Problem reported by Martin Tscholak.
31 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
32 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
33 NB: ClamAV planning to remove STREAM in "middle of 2010".
34 CL also introduces -bmalware, various -d+acl logging additions and
35 more caution in buffer sizes.
37 PP/09 Implemented reverse_ip expansion operator.
39 PP/10 Bugzilla 937: provide a "debug" ACL control.
41 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
43 PP/12 Bugzilla 973: Implement --version.
45 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
47 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
49 PP/15 Bugzilla 816: support multiple condition rules on Routers.
51 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
52 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
53 ignore trailing whitespace.
55 JJ/02 prevent non-panic DKIM error from being sent to paniclog
57 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
60 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
61 Notification from Dr Andrew Aitchison.
67 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
68 $data_path, and $header_path variables; fixed documentation bugs and
71 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
72 exipick to access non-standard spools, including the "frozen" queue
75 NM/01 Bugzilla 965: Support mysql stored procedures.
76 Patch from Alain Williams
78 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
80 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
81 Patch from Andreas Metzler
83 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
84 Patch from Kirill Miazine
86 NM/05 Bugzilla 671: Added umask to procmail example.
88 JJ/03 installed exipick 20100323.0, fixing doc bug
90 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
91 directory. Notification and patch from Dan Rosenberg.
93 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
95 TK/02 Improve log output when DKIM signing operation fails.
97 MH/01 Treat the transport option dkim_domain as a colon separated
98 list, not as a single string, and sign the message with each element,
99 omitting multiple occurences of the same signer.
101 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
102 Bugzilla 985, 986. Patch by Simon Arlott
104 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
105 Patch by Simon Arlott
107 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
108 MBX locking. Notification from Dan Rosenberg.
114 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
116 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
118 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
120 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
122 NM/04 Bugzilla 915: Flag broken perl installation during build.
128 TK/01 Added patch by Johannes Berg that expands the main option
129 "spamd_address" if it starts with a dollar sign.
131 TK/02 Write list of recipients to X-Envelope-Sender header when building
132 the mbox-format spool file for content scanning (suggested by Jakob
135 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
136 (http://www.dcc-servers.net/) support via dccifd. Activated by
137 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
139 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
140 by Mark Daniel Reidel <mr@df.eu>.
142 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
143 When building exim an external PCRE library is now needed -
144 PCRE is a system library on the majority of modern systems.
145 See entry on PCRE_LIBS in EDITME file.
147 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
148 conversation. Added nologin parameter to request.
149 Patch contributed by Kirill Miazine.
151 TF/01 Do not log submission mode rewrites if they do not change the address.
153 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
155 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
156 log files in place. Contributed by Roberto Lima.
158 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
160 TF/03 Bugzilla 615: When checking the local_parts router precondition
161 after a local_part_suffix or local_part_prefix option, Exim now
162 does not use the address's named list lookup cache, since this
163 contains cached lookups for the whole local part.
165 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
166 Robert Millan. Documentation is in experimental-spec.txt.
168 TF/04 Bugzilla 668: Fix parallel build (make -j).
170 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
172 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
173 Patch provided by Jan Srzednicki.
175 TF/05 Leading white space used to be stripped from $spam_report which
176 wrecked the formatting. Now it is preserved.
178 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
179 that they are available at delivery time.
181 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
183 TF/08 TLS error reporting now respects the incoming_interface and
184 incoming_port log selectors.
186 TF/09 Produce a more useful error message if an SMTP transport's hosts
187 setting expands to an empty string.
189 NM/06 Bugzilla 744: EXPN did not work under TLS.
190 Patch provided by Phil Pennock.
192 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
193 Patch provided by Richard Godbee.
195 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
196 acl_smtp_notquit, added index entry.
198 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
199 Patch provided by Eugene Bujak.
201 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
202 accept(). Patch provided by Maxim Dounin.
204 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
205 Patch provided by Phil Pennock.
207 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
209 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
210 Patch provided by Brad "anomie" Jorsch.
212 NM/14 Bugzilla 622: Added timeout setting to transport filter.
213 Patch provided by Dean Brooks.
215 TK/05 Add native DKIM support (does not depend on external libraries).
217 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
218 Patch provided by Graeme Fowler.
220 NM/16 Bugzilla 851: Documentation example syntax fix.
222 NM/17 Changed NOTICE file to remove references to embedded PCRE.
224 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
227 NM/19 Bugzilla 745: TLS version reporting.
228 Patch provided by Phil Pennock.
230 NM/20 Bugzilla 167: bool: condition support.
231 Patch provided by Phil Pennock.
233 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
234 clients. Patch provided by Phil Pennock.
236 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
237 Patch provided by Brad "anomie" Jorsch.
239 NM/23 Bugzilla 687: Fix misparses in eximstats.
240 Patch provided by Heiko Schlittermann.
242 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
243 Patch provided by Heiko Schlittermann.
245 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
246 plus update to original patch.
248 NM/26 Bugzilla 799: Documentation correction for ratelimit.
250 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
251 Patch provided by David Brownlee.
253 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
255 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
257 NM/30 Bugzilla 888: TLS documentation bugfixes.
259 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
261 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
262 Unlike the original bugzilla I have changed all shell scripts in src tree.
264 NM/33 Bugzilla 898: Transport filter timeout fix.
265 Patch by Todd Rinaldo.
267 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
268 Patch by Serge Demonchaux.
270 NM/35 Bugzilla 39: Base64 decode bug fixes.
271 Patch by Jakob Hirsch.
273 NM/36 Bugzilla 909: Correct connect() call in dcc code.
275 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
277 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
279 NM/39 Bugzilla 911: Fixed MakeLinks build script.
285 TK/01 Add preliminary DKIM support. Currently requires a forked version of
286 ALT-N's libdkim that I have put here:
287 http://duncanthrax.net/exim-experimental/
289 Note to Michael Haardt: I had to rename some vars in sieve.c. They
290 were called 'true' and it seems that C99 defines that as a reserved
291 keyword to be used with 'bool' variable types. That means you could
292 not include C99-style headers which use bools without triggering
293 build errors in sieve.c.
295 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
296 as mailq or other aliases. Changed the --help handling significantly
297 to do whats expected. exim_usage() emits usage/help information.
299 SC/01 Added the -bylocaldomain option to eximstats.
301 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
303 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
305 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
311 PH/01 Another patch from the Sieve maintainer.
313 PH/02 When an IPv6 address is converted to a string for single-key lookup
314 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
315 dots are used instead of colons so that keys in lsearch files need not
316 contain colons. This was done some time before quoting was made available
317 in lsearch files. However, iplsearch files do require colons in IPv6 keys
318 (notated using the quote facility) so as to distinguish them from IPv4
319 keys. This meant that lookups for IP addresses in host lists did not work
320 for iplsearch lookups.
322 This has been fixed by arranging for IPv6 addresses to be expressed with
323 colons if the lookup type is iplsearch. This is not incompatible, because
324 previously such lookups could never work.
326 The situation is now rather anomolous, since one *can* have colons in
327 ordinary lsearch keys. However, making the change in all cases is
328 incompatible and would probably break a number of configurations.
330 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
333 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
334 conversion specification without a maximum field width, thereby enabling
335 a rogue spamd server to cause a buffer overflow. While nobody in their
336 right mind would setup Exim to query an untrusted spamd server, an
337 attacker that gains access to a server running spamd could potentially
338 exploit this vulnerability to run arbitrary code as the Exim user.
340 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
341 $primary_hostname instead of what libspf2 thinks the hosts name is.
343 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
344 a directory entry by the name of the lookup key. Previously, if a
345 symlink pointed to a non-existing file or a file in a directory that
346 Exim lacked permissions to read, a lookup for a key matching that
347 symlink would fail. Now it is enough that a matching directory entry
348 exists, symlink or not. (Bugzilla 503.)
350 PH/03 The body_linecount and body_zerocount variables are now exported in the
353 PH/04 Added the $dnslist_matched variable.
355 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
356 This means they are set thereafter only if the connection becomes
359 PH/06 Added the client_condition to authenticators so that some can be skipped
360 by clients under certain conditions.
362 PH/07 The error message for a badly-placed control=no_multiline_responses left
363 "_responses" off the end of the name.
365 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
367 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
368 (without spaces) instead of just copying the configuration text.
370 PH/10 Added the /noupdate option to the ratelimit ACL condition.
372 PH/11 Added $max_received_linelength.
374 PH/12 Added +ignore_defer and +include_defer to host lists.
376 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
377 way in which PCRE > 7.0 is built.
379 PH/14 Implemented queue_only_load_latch.
381 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
382 MAIL command. The effect was to mangle the value on 64-bit systems.
384 PH/16 Another patch from the Sieve maintainer.
386 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
388 PH/18 If a system quota error occurred while trying to create the file for
389 a maildir delivery, the message "Mailbox is full" was not appended to the
390 bounce if the delivery eventually timed out. Change 4.67/27 below applied
391 only to a quota excession during the actual writing of the file.
393 PH/19 It seems that peer DN values may contain newlines (and other non-printing
394 characters?) which causes problems in log lines. The DN values are now
395 passed through string_printing() before being added to log lines.
397 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
398 and InterBase are left for another time.)
400 PH/21 Added message_body_newlines option.
402 PH/22 Guard against possible overflow in moan_check_errorcopy().
404 PH/23 POSIX allows open() to be a macro; guard against that.
406 PH/24 If the recipient of an error message contained an @ in the local part
407 (suitably quoted, of course), incorrect values were put in $domain and
408 $local_part during the evaluation of errors_copy.
414 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
415 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
418 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
419 issue a MAIL command.
421 PH/02 In an ACL statement such as
423 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
425 if a client was not listed at all, or was listed with a value other than
426 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
427 the condition was not true (as it should be), so access was not denied.
428 The bug was that the ! inversion was incorrectly passed on to the second
429 item. This has been fixed.
431 PH/03 Added additional dnslists conditions == and =& which are different from
432 = and & when the dns lookup returns more than one IP address.
434 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
435 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
437 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
438 FSYNC, which compiles an option called disable_fsync that allows for
439 bypassing fsync(). The documentation is heavily laced with warnings.
441 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
443 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
444 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
445 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
446 including adding "make clean"; (3) Added -fPIC when compiling the test
447 dynamically loaded module, to get rid of a warning.
449 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
450 message fails, move_frozen_messages = true and ignore_bounce_errors_after
451 = 0s. The bug is otherwise harmless.
453 PH/07 There was a bug in the dovecot authenticator such that the value of
454 $auth1 could be overwritten, and so not correctly preserved, after a
455 successful authentication. This usually meant that the value preserved by
456 the server_setid option was incorrect.
458 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
460 PH/09 Installed PCRE release 7.0.
462 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
463 run for batched SMTP input. It is now run at the start of every message
464 in the batch. While fixing this I discovered that the process information
465 (output by running exiwhat) was not always getting set for -bs and -bS
466 input. This is fixed, and it now also says "batched" for BSMTP.
468 PH/11 Added control=no_pipelining.
470 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
471 patch, slightly modified), and move the expansion of helo_data till after
472 the connection is made in the smtp transport (so it can use these
475 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
477 PH/14 Added log_selector = +pid.
479 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
481 PH/16 Add ${if forany and ${if forall.
483 PH/17 Added dsn_from option to vary the From: line in DSNs.
485 PH/18 Flush SMTP output before performing a callout, unless control =
486 no_callout_flush is set.
488 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
489 was true (the default) a successful delivery failed to delete the retry
490 item, thus causing premature timeout of the address. The bug is now
493 PH/20 Added hosts_avoid_pipelining to the smtp transport.
495 PH/21 Long custom messages for fakedefer and fakereject are now split up
496 into multiline reponses in the same way that messages for "deny" and
497 other ACL rejections are.
499 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
500 with slight modification.
502 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
503 draft, changing the syntax and factoring some duplicate code".
505 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
506 for deliveries of the second and subsequent messages over the same SMTP
509 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
510 ${reduce, with only minor "tidies".
512 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
514 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
515 expansion side effects.
517 PH/27 When a message times out after an over-quota error from an Exim-imposed
518 quota, the bounce message says "mailbox is full". This message was not
519 being given when it was a system quota that was exceeded. It now should
522 MH/03 Made $recipients available in local_scan(). local_scan() already has
523 better access to the recipient list through recipients_list[], but
524 $recipients can be useful in postmaster-provided expansion strings.
526 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
527 in the case of a MAIL command with additional options following the
528 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
529 were accidentally chopped off.
531 PH/29 SMTP synchronization checks are implemented when a command is read -
532 there is a check that no more input is waiting when there shouldn't be
533 any. However, for some commands, a delay in an ACL can mean that it is
534 some time before the response is written. In this time, more input might
535 arrive, invalidly. So now there are extra checks after an ACL has run for
536 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
537 pipelining has not been advertised.
539 PH/30 MH's patch to allow iscntrl() characters to be list separators.
541 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
542 returned in the SMTP response when smtp_return_error_details was false.
545 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
546 instead of the C I/O that was originally supplied, because problems were
549 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
550 Exim which did not show up earlier: it was assuming that a call to
551 SSL_CTX_set_info_callback() might give an error value. In fact, there is
552 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
553 was a macro that became an assignment, so it seemed to work. This has
554 changed to a proper function call with a void return, hence the compile
555 error. Exim's code has been fixed.
557 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
560 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
562 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
564 PH/37 If a message is not accepted after it has had an id assigned (e.g.
565 because it turns out to be too big or there is a timeout) there is no
566 "Completed" line in the log. When some messages of this type were
567 selected by exigrep, they were listed as "not completed". Others were
568 picked up by some special patterns. I have improved the selection
569 criteria to be more general.
571 PH/38 The host_find_failed option in the manualroute router can now be set
572 to "ignore", to completely ignore a host whose IP address cannot be
573 found. If all hosts are ignored, the behaviour is controlled by the new
574 host_all_ignored option.
576 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
577 homing or because of multiple MX records with /mx) generated more than
578 one IP address, and the following item turned out to be the local host,
579 all the secondary addresses of the first item were incorrectly removed
580 from the list, along with the local host and any following hosts (which
581 is what is supposed to happen).
583 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
584 whoever called Exim into the -H file. In the case of the daemon it was
585 behaving confusingly. When first started, it used values for whoever
586 started the daemon, but after a SIGHUP it used the Exim user (because it
587 calls itself on a restart). I have changed the code so that it now always
590 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
591 message are rejected with the same error (e.g. no authentication or bad
592 sender address), and a DATA command is nevertheless sent (as can happen
593 with PIPELINING or a stupid MUA), the error message that was given to the
594 RCPT commands is included in the rejection of the DATA command. This is
595 intended to be helpful for MUAs that show only the final error to their
598 PH/42 Another patch from the Sieve maintainer.
600 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
601 Eximstats - Fixed some broken HTML links and added missing column headers
603 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
604 columns for Rejects, Temp Rejects, Ham, and Spam rows.
606 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
608 PH/43 Yet another patch from the Sieve maintainer.
610 PH/44 I found a way to check for a TCP/IP connection going away before sending
611 the response to the final '.' that terminates a message, but only in the
612 case where the client has not sent further data following the '.'
613 (unfortunately, this is allowed). However, in many cases there won't be
614 any further data because there won't be any more messages to send. A call
615 to select() can be used: if it shows that the input is "ready", there is
616 either input waiting, or the socket has been closed. An attempt to read
617 the next input character can distinguish the two cases. Previously, Exim
618 would have sent an OK response which the client would never have see.
619 This could lead to message repetition. This fix should cure that, at
620 least in a lot of common cases.
622 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
623 advertised in response to EHLO.
629 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
630 fixed by 4.65/MH/01 (is this a record?) are fixed:
632 (i) An empty string was always treated as zero by the numeric comparison
633 operators. This behaviour has been restored.
635 (ii) It is documented that the numeric comparison operators always treat
636 their arguments as decimal numbers. This was broken in that numbers
637 starting with 0 were being interpreted as octal.
639 While fixing these problems I realized that there was another issue that
640 hadn't been noticed. Values of message_size_limit (both the global option
641 and the transport option) were treated as octal if they started with 0.
642 The documentation was vague. These values are now always treated as
643 decimal, and I will make that clear in the documentation.
649 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
650 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
653 MH/01 Don't check that the operands of numeric comparison operators are
654 integers when their expansion is in "skipping" mode (fixes bug
655 introduced by 4.64-PH/07).
657 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
658 child addresses, Exim now panics and dies. Previously, because the count
659 is held in a short int, deliveries were likely to be lost. As such a
660 large number of recipients for a single message is ridiculous
661 (performance will be very, very poor), I have chosen to impose a limit
662 rather than extend the field.
668 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
669 leftover -K file (the existence of which was triggered by #402).
670 While we were at it, introduced process PID as part of the -K
671 filename. This should rule out race conditions when creating
674 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
675 processing considerably. Previous code took too long for large mails,
676 triggering a timeout which in turn triggers #401.
678 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
679 in the DK code in transports.c. sendfile() is not really portable,
680 hence the _LINUX specificness.
682 TF/01 In the add_headers option to the mail command in an Exim filter,
683 there was a bug that Exim would claim a syntax error in any
684 header after the first one which had an odd number of characters
687 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
688 callout verification, Exim cached a "reject" for the entire domain. This
689 is correct for most verifications, but it is not correct for a recipient
690 verification with use_sender or use_postmaster set, because in that case
691 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
692 case of MAIL FROM:<> rejection from other early rejections (e.g.
693 rejection of HELO). When verifying a recipient using a non-null MAIL
694 address, the cache is ignored if it shows MAIL FROM:<> rejection.
695 Whatever the result of the callout, the value of the domain cache is
696 left unchanged (for any other kind of callout, getting as far as trying
697 RCPT means that the domain itself is ok).
699 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
702 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
703 manifest itself as EPIPE rather than ECONNECT. When tidying away a
704 session, the daemon ignores ECONNECT errors and logs others; it now
705 ignores EPIPE as well.
707 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
708 (quoted-printable decoding).
710 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
711 later the small subsequent patch to fix an introduced bug.
713 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
715 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
717 PH/08 An error is now given if message_size_limit is specified negative.
719 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
720 to be given (somewhat) arbitrary names.
722 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
725 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
726 miscellaneous code fixes
728 PH/10 Added the log_reject_target ACL modifier to specify where to log
731 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
732 hostname. This is wrong, because it relates to the incoming message (and
733 probably the interface on which it is arriving) and not to the outgoing
734 callout (which could be using a different interface). This has been
735 changed to use the value of the helo_data option from the smtp transport
736 instead - this is what is used when a message is actually being sent. If
737 there is no remote transport (possible with a router that sets up host
738 addresses), $smtp_active_hostname is used.
740 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
741 tweaks were necessary in order to get it to work (see also 21 below):
742 (a) The code assumed that strncpy() returns a negative number on buffer
743 overflow, which isn't the case. Replaced with Exim's string_format()
745 (b) There were several signed/unsigned issues. I just did the minimum
746 hacking in of casts. There is scope for a larger refactoring.
747 (c) The code used strcasecmp() which is not a standard C function.
748 Replaced with Exim's strcmpic() function.
749 (d) The code set only $1; it now sets $auth1 as well.
750 (e) A simple test gave the error "authentication client didn't specify
751 service in request". It would seem that Dovecot has changed its
752 interface. Fortunately there's a specification; I followed it and
753 changed what the client sends and it appears to be working now.
755 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
758 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
759 address A is aliased to B and C, where B exists and C does not. Without
760 -v the output is "A verified" because verification stops after a
761 successful redirection if more than one address is generated. However,
762 with -v the child addresses are also verified. Exim was outputting "A
763 failed to verify" and then showing the successful verification for C,
764 with its parentage. It now outputs "B failed to verify", showing B's
765 parentage before showing the successful verification of C.
767 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
768 look up a TXT record in a specific list after matching in a combined
771 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
772 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
773 they consult the DNS. I had assumed they would set it the way they
774 wanted; and indeed my experiments on Linux seem to show that in some
775 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
776 To be on the safe side, however, I have now made the interface to
777 host_find_byname() similar to host_find_bydns(), with an argument
778 containing the DNS resolver options. The host_find_byname() function now
779 sets these options at its start, just as host_find_bydns() does. The smtp
780 transport options dns_qualify_single and dns_search_parents are passed to
781 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
782 of host_find_byname() use the default settings of RES_DEFNAMES
783 (qualify_single) but not RES_DNSRCH (search_parents).
785 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
786 spool_read_header() do less string testing, by means of a preliminary
787 switch on the second character of optional "-foo" lines. (This is
788 overdue, caused by the large number of possibilities that now exist.
789 Originally there were few.) While I was there, I also converted the
790 str(n)cmp tests so they don't re-test the leading "-" and the first
791 character, in the hope this might squeeze out yet more improvement.
793 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
794 flag allowing group syntax was set by the header_syntax check but not
795 turned off, possible causing trouble later; (2) The flag was not being
796 set at all for the header_verify test, causing "group"-style headers to
797 be rejected. I have now set it in this case, and also caused header_
798 verify to ignore an empty address taken from a group. While doing this, I
799 came across some other cases where the code for allowing group syntax
800 while scanning a header line wasn't quite right (mostly, not resetting
801 the flag correctly in the right place). These bugs could have caused
802 trouble for malformed header lines. I hope it is now all correct.
804 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
805 with the "reply" argument non-NULL. The code, however (which originally
806 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
807 but it didn't always do it. This confused somebody who was copying the
808 code for some other use. I have removed all the tests.
810 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
811 feature that was used to support insecure browsers during the U.S. crypto
812 embargo. It requires special client support, and Exim is probably the
813 only MTA that supported it -- and would never use it because real RSA is
814 always available. This code has been removed, because it had the bad
815 effect of slowing Exim down by computing (never used) parameters for the
816 RSA_EXPORT functionality.
818 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
819 authenticator to fail if there's a tab character in the incoming data
820 (there should never be unless someone is messing about, as it's supposed
821 to be base64-encoded). Also added, on Timo's advice, the "secured" option
822 if the connection is using TLS or if the remote IP is the same as the
823 local IP, and the "valid-client-cert option" if a client certificate has
826 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
827 authenticators. This can be used for authorization after authentication
828 succeeds. (In the case of plaintext, it servers for both authentication
831 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
832 if any retry times were supplied.
834 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
835 connection, where there is no client IP address to check. In this
836 situation, the verify now always succeeds.
838 PH/25 Applied John Jetmore's -Mset patch.
840 PH/26 Added -bem to be like -Mset, but loading a message from a file.
842 PH/27 In a string expansion for a processed (not raw) header when multiple
843 headers of the same name were present, leading whitespace was being
844 removed from all of them, but trailing whitespace was being removed only
845 from the last one. Now trailing whitespace is removed from each header
846 before concatenation. Completely empty headers in a concatenation (as
849 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
850 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
852 PH/29 [Removed. This was a change that I later backed out, and forgot to
853 correct the ChangeLog entry (that I had efficiently created) before
854 committing the later change.]
856 PH/30 Exim was sometimes attempting to deliver messages that had suffered
857 address errors (4xx response to RCPT) over the same connection as other
858 messages routed to the same hosts. Such deliveries are always "forced",
859 so retry times are not inspected. This resulted in far too many retries
860 for the affected addresses. The effect occurred only when there were more
861 hosts than the hosts_max_try setting in the smtp transport when it had
862 the 4xx errors. Those hosts that it had tried were not added to the list
863 of hosts for which the message was waiting, so if all were tried, there
864 was no problem. Two fixes have been applied:
866 (i) If there are any address or message errors in an SMTP delivery, none
867 of the hosts (tried or untried) are now added to the list of hosts
868 for which the message is waiting, so the message should not be a
869 candidate for sending over the same connection that was used for a
870 successful delivery of some other message. This seems entirely
871 reasonable: after all the message is NOT "waiting for some host".
872 This is so "obvious" that I'm not sure why it wasn't done
873 previously. Hope I haven't missed anything, but it can't do any
874 harm, as the worst effect is to miss an optimization.
876 (ii) If, despite (i), such a delivery is accidentally attempted, the
877 routing retry time is respected, so at least it doesn't keep
878 hammering the server.
880 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
881 in ${readsocket because some servers need this prod.
883 PH/32 Added some extra debug output when updating a wait-xxx database.
885 PH/33 The hint "could be header name not terminated by colon", which has been
886 given for certain expansion errors for a long time, was not being given
887 for the ${if def:h_colon_omitted{... case.
889 PH/34 The spec says: "With one important exception, whenever a domain list is
890 being scanned, $domain contains the subject domain." There was at least
891 one case where this was not true.
893 PH/35 The error "getsockname() failed: connection reset by peer" was being
894 written to the panic log as well as the main log, but it isn't really
895 panic-worthy as it just means the connection died rather early on. I have
896 removed the panic log writing for the ECONNRESET error when getsockname()
899 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
900 runs only) independently of the message's sender address. This meant
901 that, if the 4xx error was in fact related to the sender, a different
902 message to the same recipient with a different sender could confuse
903 things. In particualar, this can happen when sending to a greylisting
904 server, but other circumstances could also provoke similar problems.
905 I have changed the default so that the retry time for these errors is now
906 based a combination of the sender and recipient addresses. This change
907 can be overridden by setting address_retry_include_sender=false in the
910 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
911 remote server are returned as part of bounce messages. This was not
912 happening for LMTP over a pipe (the lmtp transport), but now it is the
913 same for both kinds of LMTP.
915 PH/38 Despite being documented as not happening, Exim was rewriting addresses
916 in header lines that were in fact CNAMEs. This is no longer the case.
918 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
919 and queue runs started by the daemon processed all messages. This has
920 been fixed so that -R and -S can now usefully be given with -q<time>.
922 PH/40 Import PCRE release 6.7 (fixes some bugs).
924 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
926 PH/42 Give an error if -q is specified more than once.
928 PH/43 Renamed the variables $interface_address and $interface_port as
929 $received_ip_address and $received_port, to make it clear that these
930 values apply to message reception, and not to the outgoing interface when
931 a message is delivered. (The old names remain recognized, of course.)
933 PH/44 There was no timeout on the connect() call when using a Unix domain
934 socket in the ${readsocket expansion. There now is.
936 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
937 be meaningful with "accept".
939 SC/01 Eximstats V1.43
940 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
942 SC/02 Eximstats V1.44
943 Use a glob alias rather than an array ref in the generated
944 parser. This improves both readability and performance.
946 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
947 Collect SpamAssassin and rejection statistics.
948 Don't display local sender or destination tables unless
949 there is data to show.
950 Added average volumes into the top table text output.
952 SC/04 Eximstats V1.46
953 Collect data on the number of addresses (recipients)
954 as well as the number of messages.
956 SC/05 Eximstats V1.47
957 Added 'Message too big' to the list of mail rejection
958 reasons (thanks to Marco Gaiarin).
960 SC/06 Eximstats V1.48
961 Mainlog lines which have GMT offsets and are too short to
962 have a flag are now skipped.
964 SC/07 Eximstats V1.49 (Alain Williams)
965 Added the -emptyok flag.
967 SC/08 Eximstats V1.50
968 Fixes for obtaining the IP address from reject messages.
970 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
971 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
972 whitesspace changes from 4.64-PH/27
974 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
977 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
978 are found, allow negative numbers in numeric criteria)
980 JJ/06 exipick.20061117.2, added new $message_body_missing variable
982 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
983 to match changes made in 4.64-PH/43
985 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
987 PH/47 Put in an explicit test for a DNS lookup of an address record where the
988 "domain" is actually an IP address, and force a failure. This locks out
989 those revolvers/nameservers that support "A-for-A" lookups, in
990 contravention of the specifications.
992 PH/48 When a host name was looked up from an IP address, and the subsequent
993 forward lookup of the name timed out, the host name was left in
994 $sender_host_name, contrary to the specification.
996 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
997 restricted to single-key lookups, Exim was not diagnosing an error if
998 * or *@ was used with a query-style lookup.
1000 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1002 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1003 long ago, but noone interested enough thought of it. Let's just say that
1004 the "1.1" means that there are some new functions that weren't there at
1005 some point in the past.
1007 PH/51 Error processing for expansion failure of helo_data from an smtp
1008 transport during callout processing was broken.
1010 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1011 tested/used via the -bh/-bhc/-bs options.
1013 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1014 bug, fixed in subsequent PCRE releases).
1016 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1017 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1019 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1025 SC/01 Use a glob alias rather than an array ref in eximstats generated
1026 parser. This improves both readability and performance.
1028 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1029 Don't display local sender or destination tables in eximstats unless
1030 there is data to show.
1031 Added average volumes into the eximstats top table text output.
1033 SC/03 Collect data on the number of addresses (recipients) as well
1034 as the number of messages in eximstats.
1036 TF/01 Correct an error in the documentation for the redirect router. Exim
1037 does (usually) call initgroups() when daemonizing.
1039 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1040 with consistent privilege compared to when running as a daemon.
1042 TF/03 Note in the spec that $authenticated_id is not set for local
1043 submissions from trusted users.
1045 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1046 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1048 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1049 by adding some example configuration directives to the default
1050 configuration file. A little bit of work is required to uncomment the
1051 directives and define how usernames and passwords are checked, but
1052 there is now a framework to start from.
1054 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1055 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1056 without this. I don't know how relevant this is to other LDAP libraries.
1058 PH/02 Add the verb name to the "unknown ACL verb" error.
1060 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1062 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1064 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1065 directory not expanded when it should be if an expanded home directory
1066 was set for the address (which is overridden by the transport).
1068 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1071 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1072 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1073 because it is too late at that time, and has no effect.
1075 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1076 security issue with \' (bugzilla #107). I could not use the
1077 PQescapeStringConn() function, because it needs a PGconn value as one of
1080 PH/08 When testing addresses using -bt, indicate those final addresses that
1081 are duplicates that would not cause an additional delivery. At least one
1082 person was confused, thinking that -bt output corresponded to deliveries.
1083 (Suppressing duplicates isn't a good idea as you lose the information
1084 about possibly different redirections that led to the duplicates.)
1086 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1087 systems where poll() doesn't work, in particular OS X.
1089 PH/10 Added more information to debugging output for retry time not reached.
1091 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1092 operations in malware.c.
1094 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1097 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1098 syslog_duplication set false, log lines that would normally be written
1099 both the the main log and to the reject log were not written to syslog at
1102 PH/14 In the default configuration, change the use of "message" in ACL warn
1103 statements to "add_header".
1105 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1106 not followed by a command (e.g. "seen endif").
1108 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1109 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1112 PH/17 Added extra conditions to the default value of delay_warning_condition
1116 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1117 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1118 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1121 The Auto-Submitted: and various List- headers are standardised, whereas I
1122 don't think Precedence: ever was.
1124 PH/18 Refactored debugging code in route_finduser() to show more information,
1125 in particular, the error code if getpwnam() issues one.
1127 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1128 This is apparently needed in addition to the PH/07 change above to avoid
1129 any possible encoding problems.
1131 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1132 but not after initializing Perl.
1134 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1135 output them only if debugging. By default they are written stderr,
1136 apparently, which is not desirable.
1138 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1141 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1144 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1146 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1147 authenticated or an ident call has been made. Suppress the default
1148 values for $authenticated_id and $authenticated_sender (but permit -oMai
1149 and -oMas) when testing with -bh.
1151 PH/24 Re-jigged the order of the tests in the default configuration so that the
1152 tests for valid domains and recipients precede the DNS black list and CSA
1153 tests, on the grounds that those ones are more expensive.
1155 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1156 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1157 This bug exists in every version of Exim that I still have, right back to
1160 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1161 However, an attempt to turn on case-sensitivity in a regex key by
1162 including (?-i) didn't work because the subject string was already
1163 lowercased, and the effects were non-intuitive. It turns out that a
1164 one-line patch can be used to allow (?-i) to work as expected.
1170 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1171 other effects) broke the use of negated acl sub-conditions.
1173 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1176 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1177 "Deny" causes Exim to reject the incoming connection with a 554 error.
1178 Unfortunately, if there is a major crisis, such as a disk failure,
1179 tcp-wrappers gives "deny", whereas what one would like would be some
1180 kind of temporary error. A kludge has been added to help with this.
1181 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1182 554 error is used if errno is still zero or contains ENOENT (which occurs
1183 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1186 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1188 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1189 errors. Otherwise a message that provokes a temporary error (when other
1190 messages do not) can cause a whole host to time out.
1192 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1193 addresses were routed directly to files or pipes from a redirect router.
1194 File deliveries just didn't batch; pipe deliveries might have suffered
1197 PH/06 A failure to get a lock for a hints database would erroneously always say
1198 "Failed to get write lock", even when it was really a read lock.
1200 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1201 of 0600. This has been changed to use the value of the lockfile_mode
1202 option (which defaults to 0600).
1204 PH/08 Applied small patch from the Sieve maintainer.
1206 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1207 folder from quota calculations, a direct delivery into this folder messed
1208 up the contents of the maildirsize file. This was because the regex was
1209 used only to exclude .Trash (or whatever) when the size of the mailbox
1210 was calculated. There was no check that a delivery was happening into an
1211 excluded directory. This bug has been fixed by ignoring all quota
1212 processing for deliveries into excluded directories.
1214 PH/10 Added the maildirfolder_create_regex option to appendfile.
1220 PH/01 The code for finding all the local interface addresses on a FreeBSD
1221 system running IPv6 was broken. This may well have applied to all BSD
1222 systems, as well as to others that have similar system calls. The broken
1223 code found IPv4 interfaces correctly, but gave incorrect values for the
1224 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1225 that it would not match correctly against @[] and not recognize the IPv6
1228 PH/02 The ipliteral router was not recognizing addresses of the form user@
1229 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1231 PH/03 Added disable_ipv6.
1233 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1234 decoded form, because it is most often used to construct To: headers
1235 lines in autoreplies, and the decoded form may well be syntactically
1236 invalid. However, $reply_address has leading white space removed, and all
1237 newlines turned into spaces so that the autoreply transport does not
1240 PH/05 If group was specified without a user on a router, and no group or user
1241 was specified on a transport, the group from the router was ignored.
1243 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1244 for visible compile-time settings that can be used to change these
1245 numbers, for those that want even more. Backwards compatibility with old
1246 spool files has been maintained. However, going back to a previous Exim
1247 release will lost any variables that are in spool files.
1249 PH/07 Two small changes when running in the test harness: increase delay when
1250 passing a TCP/IP connection to a new process, in case the original
1251 process has to generate a bounce, and remove special handling of
1252 127.0.0.2 (sic), which is no longer necessary.
1254 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1255 be the same on different OS.
1257 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1260 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1261 whether --show-vars was specified or not
1263 JJ/02 exipick: Added support for new ACL variable spool format introduced
1266 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1267 syntactically invalid From: or Reply-to: line, and a filter used this to
1268 generate an autoreply, and therefore failed to obtain an address for the
1269 autoreply, Exim could try to deliver to a non-existent relative file
1270 name, causing unrelated and misleading errors. What now happens is that
1271 it logs this as a hard delivery error, but does not attempt to create a
1274 PH/11 The exinext utility has a -C option for testing purposes, but although
1275 the given file was scanned by exinext itself; it wasn't being passed on
1276 when Exim was called.
1278 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1279 an end-of-file indication when reading a command response.
1281 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1282 compiled. In many other places in Exim, IPv6 addresses are always
1283 recognized, so I have changed this. It also means that IPv4 domain
1284 literals of the form [IPV4:n.n.n.n] are now always recognized.
1286 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1287 used if the router is not running as root, for example, when verifying at
1288 ACL time, or when using -bh. The debugging output from this situation was
1289 non-existent - all you got was a failure to exec. I have made two
1292 (a) Failures to set uid/gid, the current directory, or a process leader
1293 in a subprocess such as that created by queryprogram now generate
1294 suitable debugging ouput when -d is set.
1296 (b) The queryprogram router detects when it is not running as root,
1297 outputs suitable debugging information if -d is set, and then runs
1298 the subprocess without attempting to change uid/gid.
1300 PH/15 Minor change to Makefile for building test_host (undocumented testing
1303 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1304 additional section of a DNS packet that returns MX or SRV records.
1305 Instead, it always explicitly searches for A/AAAA records. This avoids
1306 major problems that occur when a DNS server includes only records of one
1307 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1308 fixed another bug: if SRV records were looked up and the corresponding
1309 address records were *not* found in the additional section, the port
1310 values from the SRV records were lost.
1312 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1313 using the correct key (the original address) when searching the retry
1314 rules in order to find which one to use for generating the retry hint.
1316 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1317 adding the default one. Similarly, if it contains a Reply-To: header, the
1318 errors_reply_to option, if set, is not used.
1320 PH/19 When calculating a retry time, Exim used to measure the "time since
1321 failure" by looking at the "first failed" field in the retry record. Now
1322 it does not use this if it is later than than the arrival time of the
1323 message. Instead it uses the arrival time. This makes for better
1324 behaviour in cases where some deliveries succeed, thus re-setting the
1325 "first failed" field. An example is a quota failure for a huge message
1326 when small messages continue to be delivered. Without this change, the
1327 "time since failure" will always be short, possible causing more frequent
1328 delivery attempts for the huge message than are intended.
1329 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1331 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1332 $1, $2, $3) because the numerical variables can be reset during some
1333 expansion items (e.g. "match"), thereby losing the authentication data.
1335 PH/21 Make -bV show the size of off_t variables so that the test suite can
1336 decide whether to run tests for quotas > 2G.
1338 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1339 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1340 filecount value is greater than 2G or if a quota value is greater than 2G
1341 on a system where the size of off_t is not greater than 4, a panic error
1344 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1345 never match. The debug and -bh output now contains an explicit error
1346 message indicating a malformed IPv4 address or mask.
1348 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1349 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1350 PH/23 above applies.
1352 PH/25 Do not write to syslog when running in the test harness. The only
1353 occasion when this arises is a failure to open the main or panic logs
1354 (for which there is an explicit test).
1356 PH/26 Added the /no_tell option to "control=freeze".
1358 PH/27 If a host name lookup failed very early in a connection, for example, if
1359 the IP address matched host_lookup and the reverse lookup yielded a name
1360 that did not have a forward lookup, an error message of the form "no IP
1361 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1362 could be logged. Now it outputs the IP address instead of "NULL".
1364 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1365 allows the sender and the authenticated sender to be set when
1366 submitting a message from within Exim. Since child_open_exim() is
1367 documented for local_scan(), the new function should be too.
1369 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1370 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1371 results in an empty string is now treated as unset.
1373 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1375 PH/31 Added sender_verify_fail logging option.
1377 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1378 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1379 tidied the source and removed it altogether.
1381 PH/33 When a queue run was abandoned because the load average was too high, a
1382 log line was always written; now it is written only if the queue_run log
1383 selector is set. In addition, the log line for abandonment now contains
1384 information about the queue run such as the pid. This is always present
1385 in "start" and "stop" lines but was omitted from the "abandon" line.
1387 PH/34 Omit spaces between a header name and the colon in the error message that
1388 is given when verify = headers_syntax fails (if there are lots of them,
1389 the message gets confusing).
1391 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1392 names, as there are now some PTR records that contain slashes. This check
1393 is only to protect against broken name servers that fall over on strange
1394 characters, so the fact that it applies to all lookups doesn't matter.
1396 PH/36 Now that the new test suite is complete, we can remove some of the
1397 special code in Exim that was needed for the old test suite. For example,
1398 sorting DNS records because real resolvers return them in an arbitrary
1399 order. The new test suite's fake resolver always returns records in the
1402 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1403 bounces) except when queue_only is set, to avoid logging races between
1404 the different processes.
1406 PH/38 Panic-die if .include specifies a non-absolute path.
1408 PH/39 A tweak to the "H" retry rule from its user.
1410 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1411 a label. They prevented compilation on older perls.
1413 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1414 a warning to be raised on newish perls.
1416 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1417 on queue. Changes to match documented behaviour of showing count of
1418 messages matching specified criteria.
1420 PH/40 Changed the default ident timeout from 30s to 5s.
1422 PH/41 Added support for the use of login_cap features, on those BSD systems
1423 that have them, for controlling the resources used by pipe deliveries.
1425 PH/42 The content-scanning code uses fopen() to create files in which to put
1426 message data. Previously it was not paying any attention to the mode of
1427 the files. Exim runs with umask(0) because the rest of the code creates
1428 files with open(), and sets the required mode explicitly. Thus, these
1429 files were ending up world-writeable. This was not a big issue, because,
1430 being within the spool directory, they were not world-accessible. I have
1431 created a function called modefopen, which takes an additional mode
1432 argument. It sets umask(777), creates the file, chmods it to the required
1433 mode, then resets the umask. All the relevant calls to fopen() in the
1434 content scanning code have been changed to use this function.
1436 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1437 to 24 hours. This avoids potential overflow problems when processing G
1438 and H retry rules. I suspect nobody ever tinkers with this value.
1440 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1442 PH/45 When the plaintext authenticator is running as a client, the server's
1443 challenges are checked to ensure they are valid base64 strings. By
1444 default, the authentication attempt is cancelled if an invalid string is
1445 received. Setting client_ignore_invalid_base64 true ignores these errors.
1446 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1447 they are received. Thus, the responses can be made to depend on the
1448 challenges. If an invalid string is ignored, an empty string is placed in
1451 PH/46 Messages that are created by the autoreply transport now contains a
1452 References: header, in accordance with RFCs 2822 and 3834.
1454 PH/47 Added authenticated_sender_force to the smtp transport.
1456 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1458 PH/49 Installed latest patch from the Sieve maintainer.
1460 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1461 was also set, the appendfile transport was unnecessarily scanning a
1462 directory of message files (e.g. for maildir delivery) to find the count
1463 of files (along with the size), even though it did not need this
1464 information. It now does the scan only if it needs to find either the
1465 size of the count of files.
1467 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1469 PH/52 Two bugs concerned with error handling when the smtp transport is
1472 (i) Exim was not creating retry information for temporary errors given
1473 for individual recipients after the DATA command when the smtp transport
1474 was used in LMTP mode. This meant that they could be retried too
1475 frequently, and not timed out correctly.
1477 (ii) Exim was setting the flag that allows error details to be returned
1478 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1479 recipients that were returned after the DATA command.
1481 PH/53 This is related to PH/52, but is more general: for any failing address,
1482 when detailed error information was permitted to be returned to the
1483 sender, but the error was temporary, then after the final timeout, only
1484 "retry timeout exceeded" was returned. Now it returns the full error as
1485 well as "retry timeout exceeded".
1487 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1488 do this, and (what is worse) MTAs that accept it.
1490 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1491 will now be deprecated.
1493 PH/56 New os.c-cygwin from the Cygwin maintainer.
1495 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1496 formats (previously only available in exim formats via -bpr, -bpru,
1497 and -bpra. Now also available in native and exiqgrep formats)
1499 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1500 with very large, slow to parse queues
1502 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1504 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1506 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1507 responses to authentication challenges, though it was showing the
1508 challenges; (ii) I've removed the CR characters from the debug output for
1511 PH/58 Allow for the insertion of a newline as well as a space when a string
1512 is turned into more than one encoded-word during RFC 2047 encoding. The
1513 Sieve code now uses this.
1515 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1516 data_4xx, lost_connection, tls_required.
1518 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1519 message was being sent as an SMTP response.
1521 PH/61 Add -l and -k options to exicyclog.
1523 PH/62 When verifying, if an address was redirected to one new address, so that
1524 verification continued, and the new address failed or deferred after
1525 having set something in $address_data, the value of $address_data was not
1526 passed back to the ACL. This was different to the case when no
1527 redirection occurred. The value is now passed back in both cases.
1529 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1530 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1531 use login_cap.h, so on its own it isn't the distinguishing feature. The
1532 new name refers directly to the setclassresources() function.
1534 PH/65 Added configuration files for NetBSD3.
1536 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1538 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1539 is preferred over IPv4.
1541 PH/68 The bounce_return_message and bounce_return_body options were not being
1542 honoured for bounces generated during the reception of non-SMTP messages.
1543 In particular, this applied to messages rejected by the ACL. This bug has
1544 been fixed. However, if bounce_return_message is true and bounce_return_
1545 body is false, the headers that are returned for a non-SMTP message
1546 include only those that have been read before the error was detected.
1547 (In the case of an ACL rejection, they have all been read.)
1549 PH/69 The HTML version of the specification is now built in a directory called
1550 spec_html instead of spec.html, because the latter looks like a path with
1551 a MIME-type, and this confuses some software.
1553 PH/70 Catch two compiler warnings in sieve.c.
1555 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1556 function verify_get_ident() calls ip_connect() to connect a socket, but
1557 if the "connect()" function timed out, ip_connect() used to close the
1558 socket. However, verify_get_ident() also closes the socket later, and in
1559 between Exim writes to the log, which may get opened at this point. When
1560 the socket was closed in ip_connect(), the log could get the same file
1561 descriptor number as the socket. This naturally causes chaos. The fix is
1562 not to close the socket in ip_connect(); the socket should be closed by
1563 the function that creates it. There was only one place in the code where
1564 this was missing, in the iplookup router, which I don't think anybody now
1565 uses, but I've fixed it anyway.
1567 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1568 well as to direct DNS lookups. Otherwise the handling of names in host
1569 lists is inconsistent and therefore confusing.
1575 PH/01 Two changes to the default runtime configuration:
1577 (1) Move the checks for relay_from_hosts and authenticated clients from
1578 after to before the (commented out) DNS black list checks.
1580 (2) Add control=submission to the relay_from_hosts and authenticated
1581 clients checks, on the grounds that messages accepted by these
1582 statements are most likely to be submissions.
1584 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1586 (1) Generate an error if the third argument for the ${prvs expansion is
1589 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1592 (3) Reset the variables that are obtained from the first argument of
1593 ${prvscheck and used in the second argument before leaving the code,
1594 because their memory is reclaimed, so using them afterwards may do
1597 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1598 one (it's much easier than Tom thought :-).
1600 (5) Because of (4), we can now allow for the use of $prvscheck_result
1601 inside the third argument.
1603 PH/03 For some reason, the default setting of PATH when running a command from
1604 a pipe transport was just "/usr/bin". I have changed it to
1607 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1608 anything to be listed in the output from -bV.
1610 PH/05 When a filter generated an autoreply, the entire To: header line was
1611 quoted in the delivery log line, like this:
1613 => >A.N.Other <ano@some.domain> <original@ddress> ...
1615 This has been changed so that it extracts the operative address. There
1616 may be more than one such address. If so, they are comma-separated, like
1619 => >ano@some.domain,ona@other.domain <original@ddress> ...
1621 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1622 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1623 not being looked up in the rDNS to get a host name, Exim was showing the
1624 IP address twice in Received: lines, even though the IP addresses were
1625 identical. For example:
1627 Received: from [1.2.3.4] (helo=[1.2.3.4])
1629 However, if the real host name was known, it was omitting the HELO data
1630 if it matched the actual IP address. This has been tidied up so that it
1631 doesn't show the same IP address twice.
1633 PH/07 When both +timestamp and +memory debugging was on, the value given by
1634 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1635 called by the debug printing, thereby overwriting the timestamp buffer.
1636 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1638 PH/08 When the original message was included in an autoreply transport, it
1639 always said "this is a copy of the message, including all the headers",
1640 even if body_only or headers_only was set. It now gives an appropriate
1643 PH/09 Applied a patch from the Sieve maintainer which:
1645 o fixes some comments
1646 o adds the (disabled) notify extension core
1647 o adds some debug output for the result of if/elsif tests
1648 o points to the current vacation draft in the documentation
1649 and documents the missing references header update
1653 o fixes a bug in processing the envelope test (when testing
1654 multiple envelope elements, the last element determinted the
1657 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1658 Electronic Mail") by including:
1660 Auto-submitted: auto-generated
1662 in the messages that it generates (bounce messages and others, such as
1663 warnings). In the case of bounce messages for non-SMTP mesages, there was
1664 also a typo: it was using "Auto_submitted" (underscore instead of
1665 hyphen). Since every message generated by Exim is necessarily in response
1666 to another message, thes have all been changed to:
1668 Auto-Submitted: auto-replied
1670 in accordance with these statements in the RFC:
1672 The auto-replied keyword:
1674 - SHOULD be used on messages sent in direct response to another
1675 message by an automatic process,
1677 - MUST NOT be used on manually-generated messages,
1679 - MAY be used on Delivery Status Notifications (DSNs) and Message
1680 Disposition Notifications (MDNs),
1682 - MUST NOT be used on messages generated by automatic or periodic
1683 processes, except for messages which are automatic responses to
1686 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1687 to the default Received: header definition.
1689 PH/12 Added log selector acl_warn_skipped (default on).
1691 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1692 variables because (a) they are in the wrong storage pool and (b) even if
1693 they were copied, it wouldn't work properly because of the caching.
1695 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1696 checking when decoding. Apparently there are clients that generate
1697 overlong encoded strings. Why am I not surprised?
1699 PH/15 If the first argument of "${if match_address" was not empty, but did not
1700 contain an "@" character, Exim crashed. Now it writes a panic log message
1701 and treats the condition as false.
1703 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1705 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1706 extension "envelope-auth". The code is finished and in agreement with
1707 other implementations, but there is no documentation so far and in fact,
1708 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1709 not changing the active code.
1711 Print executed "if" and "elsif" statements when debugging is used. This
1712 helps a great deal to understand what a filter does.
1714 Document more things not specified clearly in RFC3028. I had all this
1715 sorted out, when out of a sudden new issues came to my mind. Oops."
1717 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1720 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1721 canonical form (as documented). However, after a host name lookup from
1722 the IP address, check_host() was doing a simple string comparison with
1723 addresses acquired from the DNS when checking that the found name did
1724 have the original IP as one of its addresses. Since any found IPv6
1725 addresses are likely to be in abbreviated form, the comparison could
1726 fail. Luckily, there already exists a function for doing the comparison
1727 by converting both addresses to binary, so now that is used instead of
1728 the text comparison.
1730 PH/20 There was another similar case to PH/19, when a complete host name was
1731 given in a host list; looking up its IP address could give an abbreviated
1732 form, whereas the current host's name might or might not be abbreviated.
1733 The same fix has been applied.
1739 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1740 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1743 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1744 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1746 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1748 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1749 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1750 Also, for "Auto-Submitted", treat anything other than "no" as
1751 non-personal, in accordance with RFC 3834. (Previously it treated
1752 anything starting "auto-" as non-personal.)
1754 TF/01 The control=submission/name=... option had a problem with syntax
1755 errors if the name included a slash character. The /name= option
1756 now slurps the rest of the string, so it can include any characters
1757 but it must come last in the list of options (after /sender_retain
1760 PH/05 Some modifications to the interface to the fake nameserver for the new
1768 TK/01 Added the "success_on_redirect" address verification option. See
1769 NewStuff for rationale and an example.
1771 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1773 PH/02 Patch to exigrep to allow it to work on syslog lines.
1775 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1776 fread() to skip over the body file's header line, because in Cygwin the
1777 header line is locked and is inaccessible.
1779 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1780 co-exist for some time) to make it clear that it is the Exim ID that is
1781 referenced, not the Message-ID: header line.
1783 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1784 string_format() function, because snprintf() does not exist on all
1787 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1788 ${stat: expansion item.
1790 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1791 protocol synchronization error", to keep the pedants happy.
1793 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1794 well as for IRIX systems, when gcc is being used. See the host.c source
1797 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1799 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1802 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1803 transport and to the smtp transport in LMTP mode.
1805 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1807 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1808 run a filter in a subprocess. This could lead to confusion in subsequent
1809 lookups in the parent process. There should also be a search_tidyup() at
1810 the end of the subprocess.
1812 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1813 only if the host matched helo_try_verify_hosts, which caused the
1814 verification to occur when the EHLO/HELO command was issued. The ACL just
1815 tested the remembered result. Now, if a previous verification attempt has
1816 not happened, "verify = helo" does it there and then.
1818 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1820 TK/03 Fix log output including CR from clamd.
1822 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1823 exist provoked a memory error which could cause a segfault.
1825 PH/15 Installed PCRE 6.2
1827 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1829 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1830 of the problem. Specifically, suggested +O2 rather than +O1 for the
1833 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1835 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1836 record, the port was not correctly logged when the outgoing_port log
1837 selector was set (it logged the transort's default port).
1839 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1840 fallback_hosts, and "hosts" in the smtp transport.
1842 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1843 host errors such as "Connection refused".
1845 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1846 authentication with radiusclient 0.4.9:
1848 - Error returned from rc_read_config was caught wrongly
1849 - Username/password not passed on to radius server due to wrong length.
1851 The presumption is that some radiusclient API changes for 4.51/PH/17
1852 were not taken care of correctly. The code is still untested by me (my
1853 Linux distribution still has 0.3.2 of radiusclient), but it was
1854 contributed by a Radius user.
1856 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1857 expanding the "port" option of the smtp transport.
1859 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1860 while reading a MIME header. Thanks to Tom Hughes for a patch.
1862 PH/24 Include config.h inside local_scan.h so that configuration settings are
1865 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1866 that in an ACL for RCPT (for example), you can examine exactly what was
1869 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1870 commands, but it was not correctly comparing the address with the actual
1871 client host address. Thus, it would show the EHLO address in Received:
1872 header lines when this was not necessary.
1874 PH/27 Added the % operator to ${eval:}.
1876 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1877 it should be ignoring failures (because with -C, for example, it has lost
1878 privilege). It wasn't ignoring creation failures other than "already
1881 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1884 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1885 because an input line was too long, either on its own, or by virtue of
1886 too many continuations, the temporary file was not being removed, and the
1887 return code was incorrect.
1889 PH/31 Missing "BOOL" in function definition in filtertest.c.
1891 PH/32 Applied Sieve patches from the maintainer.
1893 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1895 PH/33 Added "verify = not_blind".
1897 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1898 Local/Makefile (with some defaults set). These are used in built scripts
1899 such as exicyclog, but they have never been used in the exim_install
1900 script (though there are many overriding facilities there). I have
1901 arranged that the exim_install script now takes note of these two
1904 PH/35 Installed configuration files for Dragonfly.
1906 PH/36 When a locally submitted message by a trusted user did not contain a
1907 From: header, and the sender address was obtained from -f or from an SMTP
1908 MAIL command, and the trusted user did not use -F to supply a sender
1909 name, $originator_name was incorrectly used when constructing a From:
1910 header. Furthermore, $originator_name was used for submission mode
1911 messages from external hosts without From: headers in a similar way,
1912 which is clearly wrong.
1914 PH/37 Added control=suppress_local_fixups.
1916 PH/38 When log_selector = +received_sender was set, and the addition of the
1917 sender made the log line's construction buffer exactly full, or one byte
1918 less than full, an overflow happened when the terminating "\n" was
1921 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1922 when the result of a list match is failure because a DNS lookup failed.
1924 PH/40 RM_COMMAND is now used in the building process.
1926 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1927 the "build-* directories that it finds.
1929 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1930 address in a domain literal was a prefix of an interface address.
1932 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1933 when verifying a sender address, unless rewrite_headers is false.
1935 PH/44 Wrote a long comment about why errors_to addresses are verified as
1936 recipients, not senders.
1938 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1939 the ratelimit ACL was added.
1941 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1943 PH/46 Added extra information about PostgreSQL errors to the error string.
1945 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1946 avoiding the need to install special zones in a real server. This is
1947 backwards compatible; if it can't find the fake resolver, it drops back.
1948 Thus, both old and new test suites can be run.
1950 TF/02 Added util/ratelimit.pl
1952 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1953 clock is set back in time.
1955 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1956 Candler <B.Candler@pobox.com>.
1958 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1959 OK for addresses that are the result of redirections.
1961 PH/48 A number of further additions for the benefit of the new test suite,
1962 including a fake gethostbyname() that interfaces to the fake DNS resolver
1965 TF/06 The fix for widen_domains has also been applied to qualify_single and
1966 search_parents which are the other dnslookup options that can cause
1969 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1972 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1974 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1975 service" if it encountered an MX record with an empty target hostname.
1976 The message is now "an MX or SRV record indicated no SMTP service".
1978 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1979 if the DNS of the sending site is misconfigured. This is quite a
1980 common situation. This change restores the behaviour of treating a
1981 helo verification defer as a failure.
1983 PH/51 If self=fail was set on a router, the bounce message did not include the
1984 actual error message.
1990 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1992 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1993 command itself ended in error, the underlying message about the transport
1994 filter timeout was being overwritten with the pipe command error. Now the
1995 underlying error message should be appended to the second error message.
1997 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1999 PH/02 Reduce the amount of output that "make" produces by default. Full output
2000 can still be requested.
2002 PH/03 The warning log line about a condition test deferring for a "warn" verb
2003 was being output only once per connection, rather than after each
2004 occurrence (because it was using the same function as for successful
2005 "warn" verbs). This seems wrong, so I have changed it.
2007 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2008 it should not have, which might have caused a crash in the right
2009 circumstances, but probably never did.
2011 PH/04 Installed a modified version of Tony Finch's patch to make submission
2012 mode fix the return path as well as the Sender: header line, and to
2013 add a /name= option so that you can make the user's friendly name appear
2016 TF/03 Added the control = fakedefer ACL modifier.
2018 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2019 Mark Lowes for thorough testing.
2021 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2023 TK/03 Merged latest SRS patch from Miles Wilton.
2025 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2026 with the definition in sysexits.h (which is #included earlier).
2027 Fortunately, Exim does not actually use EX_OK. The code used to try to
2028 preserve the sysexits.h value, by assumimg that macro definitions were
2029 scanned for macro replacements. I have been disabused of this notion,
2030 so now the code just undefines EX_OK before #including unistd.h.
2032 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2033 in the smtp transport. When a block could not be written in a single
2034 write() function, the timeout was being re-applied to each part-write.
2035 This seems wrong - if the receiver was accepting one byte at a time it
2036 would take for ever. The timeout is now adjusted when this happens. It
2037 doesn't have to be particularly precise.
2039 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2040 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2042 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2043 without a domain if the check to <postmaster@domain> fails.
2045 SC/01 Eximstats: added -xls and the ability to specify output files
2046 (patch written by Frank Heydlauf).
2048 SC/02 Eximstats: use FileHandles for outputing results.
2050 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2052 SC/04 Eximstats: fixed display of large numbers with -nvr option
2054 SC/05 Eximstats: fixed merging of reports with empty tables.
2056 SC/06 Eximstats: added the -include_original_destination flag
2058 SC/07 Eximstats: removed tabs and trailing whitespace.
2060 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2062 TK/06 MBOX spool code: Add real "From " MBOX separator line
2063 so the .eml file is really in mbox format (even though
2064 most programs do not really care). Patch from Alex Miller.
2066 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2067 The latter is generated from $received_to and is only set if the
2068 message has one envelope recipient. SA can use these headers,
2069 obviously out-of-the-box. Patch from Alex Miller.
2071 PH/08 The ${def test on a variable was returning false if the variable's
2072 value was "0", contrary to what the specification has always said!
2073 The result should be true unless the variable is empty.
2075 PH/09 The syntax error of a character other than { following "${if
2076 def:variable_name" (after optional whitespace) was not being diagnosed.
2077 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2078 accidental colon was present, for example, could give incorrect results.
2080 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2081 result is used (not including appendfile, where other changes are about
2084 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2085 This involved changing a lot of size variables from int to off_t. It
2086 should work with maildirs and everything.
2088 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2089 spamd dying while we are connected to it.
2091 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2094 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2095 function for BDB 4.3.
2097 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2099 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2100 the sources for PCRE have been re-arranged and more files are now
2103 PH/15 The code I had for printing potentially long long variables in PH/11
2104 above was not the best (it lost precision). The length of off_t variables
2105 is now inspected at build time, and an appropriate printing format (%ld
2106 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2107 to be "long long int" or "long int". This is needed for the internal
2108 formatting function string_vformat().
2110 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2111 the configuration file to be ":syslog", then the script "guesses" where
2112 the logs files are, rather than using the compiled in default. In our
2113 case the guess is not the same as the compiled default, so the script
2114 suddenly stopped working when I started to use syslog. The patch checks
2115 to see if log_file_path is "". If so, it attempts to read it from exim
2116 with no configuration file to get the compiled in version, before it
2117 falls back to the previous guessing code."
2119 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2120 implementing BATV in an Exim configuration. See NewStuff for the gory
2123 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2124 Makefile that are specific to HP-UX.
2126 PH/18 If the "use_postmaster" option was set for a recipient callout together
2127 with the "random" option, the postmaster address was used as the MAIL
2128 FROM address for the random test, but not for the subsequent recipient
2129 test. It is now used for both.
2131 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2132 patch removes a few documentation additions to RFC 3028, because the
2133 latest draft now contains them. It adds the new en;ascii-case comparator
2134 and a new error check for 8bit text in MIME parts. Comparator and
2135 require names are now matched exactly. I enabled the subaddress
2136 extension, but it is not well tested yet (read: it works for me)."
2138 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2139 rework some of the code of TK/09 above to avoid the hardwired use of
2140 "%lld" and "long long". Replaced the call to snprintf() with a call to
2143 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2144 records point to non-existent hosts", "retry timeout exceeded", and
2145 "retry time not reached for any host after a long failure period".
2147 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2148 experimental DomainKeys support:
2150 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2151 (2) On an error such as an illegally used "control", the wrong name for
2152 the control was given.
2154 These problems did NOT occur unless DomainKeys support was compiled.
2156 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2158 PH/24 Added ${if match_ip condition.
2160 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2161 databases so that it will be absolutely obvious if a crash occurs in the
2162 DB library. This is a regular occurrence (often caused by mis-matched
2165 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2166 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2167 picked up on a user's system that detects such things. There doesn't seem
2168 to be a gcc warning option for this - only an attribute that has to be
2169 put on the function's prototype. It seems that in Fedora Core 4 they have
2170 set this on a number of new functions. No doubt there will be more in due
2173 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2174 specify a transport. However, if an address that was verified by such a
2175 router was the subject of a callout, Exim crashed because it tried to
2176 read the rcpt_include_affixes from the non-existent transport. Now it
2177 just assumes that the setting of that option is false. This bug was
2178 introduced by 4.51/PH/31.
2180 PH/28 Changed -d+all to exclude +memory, because that information is very
2181 rarely of interest, but it makes the output a lot bigger. People tend to
2182 do -d+all out of habit.
2184 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2185 code in os-type was giving problems when libc.so lives in lib64, like on
2188 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2189 aren't the modern standard, and it seems that some systems' include files
2190 don't always have them. Exim was already checking for some of the newer
2191 ones like T_AAAA, and defining it itself. I've added checks for all the
2192 record types that Exim uses.
2194 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2195 not automatically generating a new one, as it is supposed to. This
2196 prevented TLS from working. If the file did exist, but contained invalid
2197 data, a new version was generated, as expected. It was only the case of a
2198 non-existent file that was broken.
2200 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2201 with a change in libdomainkeys > 0.64.
2203 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2204 from DNS. If the selector record carries the flag, it now has
2205 precedence over the domain-wide flag.
2207 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2209 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2210 the use of a port name that isn't defined in /etc/services) occurred, the
2211 message was deferred as in a normal delivery, and thus remained on the
2212 spool, instead of being failed because of the mua_wrapper setting. This
2213 is now fixed, and I tidied up some of the mua_wrapper messages at the
2216 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2217 the messages in a hash of arrays rather than using individual hashes.
2218 This is a bit cleaner and results in dramatic memory savings, albeit
2219 at a slight CPU cost.
2221 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2222 as requested by Marc Sherman.
2224 SC/10 Eximstats: added histograms for user specified patterns as requested
2227 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2229 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2230 fopen() in the content-scanning modules that did not already have it.
2236 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2237 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2239 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2241 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2243 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2244 to test Sieve filters that use "vacation".
2246 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2247 that changes the way the GnuTLS parameters are stored in the cache file.
2248 The new format can be generated externally. For backward compatibility,
2249 if the data in the cache doesn't make sense, Exim assumes it has read an
2250 old-format file, and it generates new data and writes a new file. This
2251 means that you can't go back to an older release without removing the
2254 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2255 work if there are any delivery delays because "one_time" forces the
2256 parent to be marked "delivered", so its unseen clone is never tried
2257 again. For this reason, Exim now forbids the simultaneous setting of
2260 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2261 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2262 entry if you want to know the details. The fix, however, neglected to
2263 consider the case when local delivery batching is involved. The test for
2264 "previously delivered" was not happening when checking to see if an
2265 address could be batched with a previous (undelivered) one; under
2266 certain circumstances this could lead to multiple deliveries to the same
2269 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2270 in its include files, and this causes problems building Exim.
2272 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2273 header_syntax) but Exim was just ignoring anything given after a slash.
2274 In particular, this caused confusion with an attempt to use "verify =
2275 reverse_host_lookup/defer_ok". An error is now given when options are
2276 supplied for verify items that do not have them. (Maybe reverse_host_
2277 lookup should have a defer_ok option, but that's a different point.)
2279 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2280 defined by RFC 821) to 2048, because there were problems with some AUTH
2281 commands, and RFC 1869 says the size should be increased for extended
2282 SMTP commands that take arguments.
2284 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2287 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2288 "unknown" error; now it says that the functionality isn't in the binary.
2290 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2291 an address' error message when a string expansion fails (syntax or
2292 whatever). Otherwise the password may appear in the log. Following change
2293 PH/42 below, there is no longer a chance of it appearing in a bounce
2296 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2298 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2299 of its addresses was ever tried. (Bugzilla bug #2.)
2301 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2302 the result incorrectly in the debug output. (It correctly added a newline
2303 to what was transported.)
2305 TF/01 Added $received_time.
2307 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2308 commented out examples of how to interface to a virus scanner and to
2309 SpamAssassin. Also added commented examples of av_scanner and
2310 spamd_address settings.
2312 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2313 and controls are allowed in which ACLs. There were a couple of minor
2314 errors. Some of the entries in the conditions table (which is a table of
2315 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2316 negation of where the condition IS allowed.
2318 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2320 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2321 header file does not have a version number, so I've had to invent a new
2322 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2323 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2324 radiusclient), but it was contributed by a Radius user.
2326 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2327 files or directories, for OpenSSL.
2329 PH/19 When an Exim process that is running as root has to create an Exim log
2330 file, it does so in a subprocess that runs as exim:exim so as to get the
2331 ownership right at creation (otherwise, other Exim processes might see
2332 the file with the wrong ownership). There was no test for failure of this
2333 fork() call, which would lead to the process getting stuck as it waited
2334 for a non-existent subprocess. Forks do occasionally fail when resources
2335 run out. I reviewed all the other calls to fork(); they all seem to check
2338 PH/20 When checking for unexpected SMTP input at connect time (before writing
2339 the banner), Exim was not dealing correctly with a non-positive return
2340 from the read() function. If the client had disconnected by this time,
2341 the result was a log entry for a synchronization error with an empty
2342 string after "input=" when read() returned zero. If read() returned -1
2343 (an event I could not check), uninitialized data bytes were printed.
2344 There were reports of junk text (parts of files, etc) appearing after
2347 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2349 PH/22 Added support for macro redefinition, and (re)definition in between
2350 driver and ACL definitions.
2352 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2353 forgetting to use the resulting value; it was using the unexpanded value.
2355 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2356 hadn't been configured. The fix is from Juergen Kreileder, who
2357 understands it better than I do:
2359 "Here's what I see happening with three configured cyrus_sasl
2360 authenticators configured (plain, login, cram-md5):
2362 On startup auth_cyrus_sasl_init() gets called for each of these.
2363 This means three calls to sasl_listmech() without a specified mech_list.
2364 => SASL tests which mechs of all available mechs actually work
2365 => three warnings about OTP not working
2366 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2368 With the patch, sasl_listmech() also gets called three times. But now
2369 SASL's mech_list option is set to the server_mech specified in the the
2370 authenticator. Or in other words, the answer from sasl_listmech()
2371 gets limited to just the mech you're testing for (which is different
2373 => the return list contains just 'plain' or 'login', 'cram-md5' or
2374 nothing depending on the value of ob->server_mech.
2376 I've just tested the patch: Authentication still works fine,
2377 unavailable mechs specified in the exim configuration are still
2378 caught, and the auth.log warnings about OTP are gone."
2380 PH/25 When debugging is enabled, the contents of the command line are added
2381 to the debugging output, even when log_selector=+arguments is not
2384 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2385 answer is "GNU", and only if the return is "GNU/something" is the answer
2388 PH/27 $acl_verify_message is now set immediately after the failure of a
2389 verification in an ACL, and so is available in subsequent modifiers. In
2390 particular, the message can be preserved by coding like this:
2392 warn !verify = sender
2393 set acl_m0 = $acl_verify_message
2395 Previously, $acl_verify_message was set only while expanding "message"
2396 and "log_message" when a very denied access.
2398 PH/28 Modified OS/os.c-Linux with
2400 -#ifndef OS_LOAD_AVERAGE
2401 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2403 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2404 nomenclature these days.)
2406 PH/29 Installed patch from the Sieve maintainer that adds the options
2407 sieve_useraddress and sieve_subaddress to the redirect router.
2409 PH/30 In these circumstances:
2410 . Two addresses routed to the same list of hosts;
2411 . First host does not offer TLS;
2412 . First host accepts first address;
2413 . First host gives temporary error to second address;
2414 . Second host offers TLS and a TLS session is established;
2415 . Second host accepts second address.
2416 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2417 and peerdn, if requested) that were in fact used only for the second
2420 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2421 attention to any local part prefix or suffix that was matched by the
2422 router that accepted the address. It now behaves in the same way as it
2423 does for delivery: the affixes are removed from the local part unless
2424 rcpt_include_affixes is set on the transport.
2426 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2427 timeout during the DATA phase of an incoming message.
2429 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2430 applied a patch sanctioned by the Sieve maintainer.
2432 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2433 the uid or gid is negative. A case of a negative gid caused this to be
2434 noticed. The fix allows for either to be negative.
2436 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2437 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2440 PH/36 The change PH/12 above was broken. Fixed it.
2442 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2443 the grounds that routing the same address twice would always produce the
2444 same answer. This might have been true once, but it is certainly no
2445 longer true now. Routing a child address may depend on the previous
2446 routing that produced that child. Some complicated redirection strategies
2447 went wrong when messages had multiple recipients, and made Exim's
2448 behaviour dependent on the order in which the addresses were given.
2450 I have moved the duplicate checking until after the routing is complete.
2451 Exim scans the addresses that are assigned to local and remote
2452 transports, and removes any duplicates. This means that more work will be
2453 done, as duplicates will always all be routed, but duplicates are
2454 presumably rare, so I don't expect this is of any significance.
2456 For deliveries to pipes, files, and autoreplies, the duplicate checking
2457 still happens during the routing process, since they are not going to be
2460 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2461 It corrects a timeout issue with spamd. This is Ian's comment: "The
2462 background is that sometimes spamd either never reads data from a
2463 connection it has accepted, or it never writes response data. The exiscan
2464 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2465 blindly assumes that writes won't block so it may never time out."
2467 PH/39 Allow G after quota size as well as K and M.
2469 PH/40 The value set for $authenticated_id in an authenticator may not contain
2470 binary zeroes or newlines because the value is written to log lines and
2471 to spool files. There was no check on this. Now the value is run through
2472 the string_printing() function so that such characters are converted to
2473 printable escape sequences.
2475 PH/41 $message_linecount is a new variable that contains the total number of
2476 lines in the message. Compare $body_linecount, which is the count for the
2479 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2480 bounce and delay warning messages, except in certain special cases, which
2483 (a) An SMTP error message from a remote host;
2484 (b) A message specified in a :fail: redirection;
2485 (c) A message specified in a "fail" command in a system filter;
2486 (d) A message specified in a FAIL return from the queryprogram router;
2487 (e) A message specified by the cannot_route_message router option.
2489 In these cases only, Exim does include the error details in bounce and
2490 warning messages. There are also a few cases where bland messages such
2491 as "unrouteable address" or "local delivery error" are given.
2493 PH/43 $value is now also set for the "else" part of a ${run expansion.
2495 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2496 being worked on, but at least Exim now implements the latest version to
2499 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2500 process to complete was treated as a delivery failure, a timeout while
2501 writing the message to the pipe was logged, but erroneously treated as a
2502 successful delivery. Such timeouts include transport filter timeouts. For
2503 consistency with the overall process timeout, these timeouts are now
2504 treated as errors, giving rise to delivery failures by default. However,
2505 there is now a new Boolean option for the pipe transport called
2506 timeout_defer, which, if set TRUE, converts the failures into defers for
2507 both kinds of timeout. A transport filter timeout is now identified in
2510 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2511 systems where "make" and "gmake" are different, calling "gmake" at top
2512 level broke things. I've arranged for the value of $(MAKE) to be passed
2513 from the Makefile to this script so that it can call the same version of
2517 A note about Exim versions 4.44 and 4.50
2518 ----------------------------------------
2520 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2521 changes of various kinds. As a consequence, a big documentation update was
2522 needed. This delayed the release for rather longer than seemed good, especially
2523 in the light of a couple of (minor) security issues. Therefore, the changes
2524 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2525 release. So 4.44 and 4.50 are in effect two different branches that both start
2528 I have left the 4.50 change log unchanged; it contains all the changes since
2529 4.43. The change log for 4.44 is below; many of its items are identical to
2530 those for 4.50. This seems to be the most sensible way to preserve the
2531 historical information.
2537 1. Minor wording change to the doc/README.SIEVE file.
2539 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2540 computation of the current number of files was incorrect.
2542 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2543 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2546 4. Give more explanation in the error message when the command for a transport
2547 filter fails to execute.
2549 5. There are several places where Exim runs a non-Exim command in a
2550 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2551 was being done only for the command run by the queryprogram router. It is
2552 now done for all such subprocesses. The other cases are: ${run, transport
2553 filters, and the commands run by the lmtp and pipe transports.
2555 6. Added CONFIGURE_GROUP build-time option.
2557 7. Some older OS have a limit of 256 on the maximum number of file
2558 descriptors. Exim was using setrlimit() to set 1000 as a large value
2559 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2560 systems. I've change it so that if it can't get 1000, it tries for 256.
2562 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2563 was an oversight, and furthermore, ever since the addition of extra
2564 controls (e.g. 4.43/32), the checks on when to allow different forms of
2565 "control" were broken. There should now be diagnostics for all cases when a
2566 control that does not make sense is encountered.
2568 9. Added the /retain_sender option to "control=submission".
2570 10. $recipients is now available in the predata ACL (oversight).
2572 11. Tidy the search cache before the fork to do a delivery from a message
2573 received from the command line. Otherwise the child will trigger a lookup
2574 failure and thereby defer the delivery if it tries to use (for example) a
2575 cached ldap connection that the parent has called unbind on.
2577 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2578 of $address_data from the recipient verification was clobbered by the
2579 sender verification.
2581 13. The value of address_data from a sender verification is now available in
2582 $sender_address_data in subsequent conditions in the ACL statement.
2584 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2586 15. Added a new option "connect=<time>" to callout options, to set a different
2589 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2590 was its contents. (It was OK if the option was not defined at all.)
2592 17. A "Completed" log line is now written for messages that are removed from
2593 the spool by the -Mrm option.
2595 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2596 information about exactly what failed.
2598 19. Added -dd to debug only the daemon process.
2600 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2601 handles timeouts, both on the server side and network timeouts. Renamed the
2602 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2604 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2605 It is now set to "smtps".
2607 22. $host_address is now set to the target address during the checking of
2608 ignore_target_hosts.
2610 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2611 being passed; this would have caused $sender_host_name to have been used if
2612 matching the list had actually called for a host name (not very likely,
2613 since this list is usually IP addresses). A host name is now passed as
2616 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2617 code that specifies a non-restarting handler (typically sigaction() in
2618 modern systems) in an attempt to fix a rare and obscure crash bug.
2620 25. Narrowed the window for a race in the daemon that could cause it to ignore
2621 SIGCHLD signals. This is not a major problem, because they are used only to
2622 wake it up if nothing else does.
2624 26. A malformed maildirsize file could cause Exim to calculate negative values
2625 for the mailbox size or file count. Odd effects could occur as a result.
2626 The maildirsize information is now recalculated if the size or filecount
2629 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2630 support for a long time. Removed HAVE_SYS_VFS_H.
2632 28. Installed the latest version of exipick from John Jetmore.
2634 29. In an address list, if the pattern was not a regular expression, an empty
2635 subject address (from a bounce message) matched only if the pattern was an
2636 empty string. Non-empty patterns were not even tested. This was the wrong
2637 because it is perfectly reasonable to use an empty address as part of a
2638 database query. An empty address is now tested by patterns that are
2639 lookups. However, all the other forms of pattern expect the subject to
2640 contain a local part and a domain, and therefore, for them, an empty
2641 address still always fails if the pattern is not itself empty.
2643 30. Exim went into a mad DNS loop when attempting to do a callout where the
2644 host was specified on an smtp transport, and looking it up yielded more
2645 than one IP address.
2647 31. Re-factored the code for checking spool and log partition space into a
2648 function that finds that data and another that does the check. The former
2649 is then used to implement four new variables: $spool_space, $log_space,
2650 $spool_inodes, and $log_inodes.
2652 32. The RFC2047 encoding function was originally intended for short strings
2653 such as real names; it was not keeping to the 75-character limit for
2654 encoded words that the RFC imposes. It now respects the limit, and
2655 generates multiple encoded words if necessary. To be on the safe side, I
2656 have increased the buffer size for the ${rfc2047: expansion operator from
2659 33. It is now permitted to omit both strings after an "if" condition; if the
2660 condition is true, the result is "true". As before, when the second string
2661 is omitted, a false condition yields an empty string. This makes it less
2662 cumbersome to write custom ACL and router conditions.
2664 34. Failure to deliver a bounce message always caused it to be frozen, even if
2665 there was an errors_to setting on the router. The errors_to setting is now
2668 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2669 canonical form (fully expanded) before being placed in
2670 $sender_host_address.
2672 36. The table in the code that translates DNS record types into text (T_A to
2673 "A" for instance) was missing entries for NS and CNAME. It is just possible
2674 that this could have caused confusion if both these types were looked up
2675 for the same domain, because the text type is used as part of Exim's
2676 per-process caching. But the chance of anyone hitting this buglet seems
2679 37. The dnsdb lookup has been extended in a number of ways.
2681 (1) There is a new type, "zns", which walks up the domain tree until it
2682 finds some nameserver records. It should be used with care.
2684 (2) There is a new type, "mxh", which is like "mx" except that it returns
2685 just the host names, not the priorities.
2687 (3) It is now possible to give a list of domains (or IP addresses) to be
2688 looked up. The behaviour when one of the lookups defers can be
2689 controlled by a keyword.
2691 (4) It is now possible to specify the separator character for use when
2692 multiple records are returned.
2694 38. The dnslists ACL condition has been extended: it is now possible to supply
2695 a list of IP addresses and/or domains to be looked up in a particular DNS
2698 39. Added log_selector=+queue_time_overall.
2700 40. When running the queue in the test harness, wait just a tad after forking a
2701 delivery process, to get repeatability of debugging output.
2703 41. Include certificate and key file names in error message when GnuTLS fails
2704 to set them up, because the GnuTLS error message doesn't include the name
2705 of the failing file when there is a problem reading it.
2707 42. Allow both -bf and -bF in the same test run.
2709 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2711 44. The "Exiscan patch" is now merged into the mainline Exim source.
2713 45. Sometimes the final signoff response after QUIT could fail to get
2714 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2715 < 0 before doing a fflush(). This bug looks as though it goes back to the
2716 introduction of TLS in release 3.20, but "sometimes" must have been rare
2717 because the tests only now provoked it.
2719 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2720 (this can affect the format of dates).
2722 47. exim_tidydb, when checking for the continued existence of a message for
2723 which it has found a message-specific retry record, was not finding
2724 messages that were in split spool directories. Consequently, it was
2725 deleting retry records that should have stayed in existence.
2727 48. Steve fixed some bugs in eximstats.
2729 49. The SPA authentication driver was not abandoning authentication and moving
2730 on to the next authenticator when an expansion was forced to fail,
2731 contradicting the general specification for all authenticators. Instead it
2732 was generating a temporary error. It now behaves as specified.
2734 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2735 (the order specifies the preference for clients). The order is now AES256,
2736 AES128, 3DES, ARCFOUR128.
2738 51. Small patch to Sieve code - explicitly set From: when generating an
2741 52. Exim crashed if a remote delivery caused a very long error message to be
2742 recorded - for instance if somebody sent an entire SpamAssassin report back
2743 as a large number of 550 error lines. This bug was coincidentally fixed by
2744 increasing the size of one of Exim's internal buffers (big_buffer) that
2745 happened as part of the Exiscan merge. However, to be on the safe side, I
2746 have made the code more robust (and fixed the comments that describe what
2749 53. Now that there can be additional text after "Completed" in log lines (if
2750 the queue_time_overall log selector is set), a one-byte patch to exigrep
2751 was needed to allow it to recognize "Completed" as not the last thing in
2754 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2755 patch that reportedly fixes this has been added. I am not expert enough to
2756 create a test for it. This is what the patch creator wrote:
2758 "I found a little strange behaviour of ldap code when working with
2759 Windows 2003 AD Domain, where users was placed in more than one
2760 Organization Units. When I tried to give exim partial DN, the exit code
2761 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2762 But simultaneously result of request was absolutely normal ldap result,
2763 so I produce this patch..."
2765 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2766 REFERENCE, so I have modified the code to exclude the patch when that macro
2769 55. Some experimental protocols are using DNS PTR records for new purposes. The
2770 keys for these records are domain names, not reversed IP addresses. The
2771 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2772 leaves it alone. Component reversal etc. now happens only for IP addresses.
2775 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2777 57. Double the size of the debug message buffer (to 2048) so that more of very
2778 long debug lines gets shown.
2780 58. The exicyclog utility now does better if the number of log files to keep
2781 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2783 59. Two changes related to the smtp_active_hostname option:
2785 (1) $smtp_active_hostname is now available as a variable.
2786 (2) The default for smtp_banner uses $smtp_active_hostname instead
2787 of $primary_hostname.
2789 60. The host_aton() function is supposed to be passed a string that is known
2790 to be a valid IP address. However, in the case of IPv6 addresses, it was
2791 not checking this. This is a hostage to fortune. Exim now panics and dies
2792 if the condition is not met. A case was found where this could be provoked
2793 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2794 components; fortuitously, this particular loophole had already been fixed
2795 by change 4.50/55 above.
2797 If there are any other similar loopholes, the new check in host_aton()
2798 itself should stop them being exploited. The report I received stated that
2799 data on the command line could provoke the exploit when Exim was running as
2800 exim, but did not say which command line option was involved. All I could
2801 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2802 running as the user.
2805 61. There was a buffer overflow vulnerability in the SPA authentication code
2806 (which came originally from the Samba project). I have added a test to the
2807 spa_base64_to_bits() function which I hope fixes it.
2810 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2811 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2813 63. The daemon start-up calls getloadavg() while still root for those OS that
2814 need the first call to be done as root, but it missed one case: when
2815 deliver_queue_load_max is set with deliver_drop_privilege. This is
2816 necessary for the benefit of the queue runner, because there is no re-exec
2817 when deliver_drop_privilege is set.
2819 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2820 This has been fixed.
2822 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2823 was in use, was not putting the data itself into the right store pool;
2824 consequently, it could be overwritten for a subsequent message in the same
2825 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2828 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2830 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2831 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2832 the function were treating the return as a boolean value, which happened to
2833 work because 0=false and not-0=true, but is not correct code.
2835 68. The host_aton() function was not handling scoped IPv6 addresses (those
2836 with, for example, "%eth0" on the end) correctly.
2838 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2839 negated items (that is, ~something) in unsigned ints. Some compilers
2840 apparently mutter when there is no cast.
2842 70. If an address verification called from an ACL failed, and did not produce a
2843 user-specific message (i.e. there was only a "system" message), nothing was
2844 put in $acl_verify_message. In this situation, it now puts the system
2847 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2848 session; change 4.31/43 added the unwanted input to the log line - except
2849 that it did not do this in the start of session case. It now does.
2851 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2852 This is wrong and can cause the other end to generate a synchronization
2853 error if it is another Exim or anything else that does the synchronization
2854 check. A QUIT command is no longer sent after a timeout.
2856 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2857 during host lookups.
2859 74. The defer_ok option of callout verification was not working if it was used
2860 when verifying addresses in header lines, that is, for this case:
2862 verify = header_sender/callout=defer_ok
2864 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2865 those file descriptors could be used for SMTP connections. If anything
2866 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2867 could be sent to the SMTP client, causing chaos. The daemon now opens
2868 stdin, stdout, and stderr to /dev/null when it puts itself into the
2871 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2872 log by default. The user can override this with suitable Perl magic.
2874 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2875 the log message when discard triggers, was not working for the DATA ACL or
2876 for the non-SMTP ACL.
2878 78. Error message wording change in sieve.c.
2880 79. If smtp_accept_max_per_host was set, the number of connections could be
2881 restricted to fewer than expected, because the daemon was trying to set up
2882 a new connection before checking whether the processes handling previous
2883 connections had finished. The check for completed processes is now done
2884 earlier. On busy systems, this bug wouldn't be noticed because something
2885 else would have woken the daemon, and it would have reaped the completed
2888 80. If a message was submitted locally by a user whose login name contained one
2889 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2890 It caused a spool format error. I have fixed the spool reading code. A
2891 related problem was that the "from" clause in the Received: line became
2892 illegal because of the space(s). It is now covered by ${quote_local_part.
2894 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2897 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2899 83. Patch from Sieve maintainer to fix unterminated string problem in
2900 "vacation" handling.
2902 84. Some minor changes to the Linux configuration files to help with other
2903 OS variants using glibc.
2905 85. One more patch for Sieve to update vacation handling to latest spec.
2908 ----------------------------------------------------
2909 See the note above about the 4.44 and 4.50 releases.
2910 ----------------------------------------------------
2916 1. Change 4.43/35 introduced a bug that caused file counts to be
2917 incorrectly computed when quota_filecount was set in an appendfile
2920 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2921 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2924 3. Give more explanation in the error message when the command for a transport
2925 filter fails to execute.
2927 4. There are several places where Exim runs a non-Exim command in a
2928 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2929 was being done only for the command run by the queryprogram router. It is
2930 now done for all such subprocesses. The other cases are: ${run, transport
2931 filters, and the commands run by the lmtp and pipe transports.
2933 5. Some older OS have a limit of 256 on the maximum number of file
2934 descriptors. Exim was using setrlimit() to set 1000 as a large value
2935 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2936 systems. I've change it so that if it can't get 1000, it tries for 256.
2938 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2939 was an oversight, and furthermore, ever since the addition of extra
2940 controls (e.g. 4.43/32), the checks on when to allow different forms of
2941 "control" were broken. There should now be diagnostics for all cases when a
2942 control that does not make sense is encountered.
2944 7. $recipients is now available in the predata ACL (oversight).
2946 8. Tidy the search cache before the fork to do a delivery from a message
2947 received from the command line. Otherwise the child will trigger a lookup
2948 failure and thereby defer the delivery if it tries to use (for example) a
2949 cached ldap connection that the parent has called unbind on.
2951 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2952 of $address_data from the recipient verification was clobbered by the
2953 sender verification.
2955 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2956 was its contents. (It was OK if the option was not defined at all.)
2958 11. A "Completed" log line is now written for messages that are removed from
2959 the spool by the -Mrm option.
2961 12. $host_address is now set to the target address during the checking of
2962 ignore_target_hosts.
2964 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2965 being passed; this would have caused $sender_host_name to have been used if
2966 matching the list had actually called for a host name (not very likely,
2967 since this list is usually IP addresses). A host name is now passed as
2970 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2971 code that specifies a non-restarting handler (typically sigaction() in
2972 modern systems) in an attempt to fix a rare and obscure crash bug.
2974 15. Narrowed the window for a race in the daemon that could cause it to ignore
2975 SIGCHLD signals. This is not a major problem, because they are used only to
2976 wake it up if nothing else does.
2978 16. A malformed maildirsize file could cause Exim to calculate negative values
2979 for the mailbox size or file count. Odd effects could occur as a result.
2980 The maildirsize information is now recalculated if the size or filecount
2983 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2984 support for a long time. Removed HAVE_SYS_VFS_H.
2986 18. Updated exipick to current release from John Jetmore.
2988 19. Allow an empty sender to be matched against a lookup in an address list.
2989 Previously the only cases considered were a regular expression, or an
2992 20. Exim went into a mad DNS lookup loop when doing a callout where the
2993 host was specified on the transport, if the DNS lookup yielded more than
2996 21. The RFC2047 encoding function was originally intended for short strings
2997 such as real names; it was not keeping to the 75-character limit for
2998 encoded words that the RFC imposes. It now respects the limit, and
2999 generates multiple encoded words if necessary. To be on the safe side, I
3000 have increased the buffer size for the ${rfc2047: expansion operator from
3003 22. Failure to deliver a bounce message always caused it to be frozen, even if
3004 there was an errors_to setting on the router. The errors_to setting is now
3007 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3008 canonical form (fully expanded) before being placed in
3009 $sender_host_address.
3011 24. Updated eximstats to version 1.33
3013 25. Include certificate and key file names in error message when GnuTLS fails
3014 to set them up, because the GnuTLS error message doesn't include the name
3015 of the failing file when there is a problem reading it.
3017 26. Expand error message when OpenSSL has problems setting up cert/key files.
3020 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3021 (this can affect the format of dates).
3023 28. exim_tidydb, when checking for the continued existence of a message for
3024 which it has found a message-specific retry record, was not finding
3025 messages that were in split spool directories. Consequently, it was
3026 deleting retry records that should have stayed in existence.
3028 29. eximstats updated to version 1.35
3029 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3030 1.35 - bugfix such that pie charts by volume are generated correctly
3032 30. The SPA authentication driver was not abandoning authentication and moving
3033 on to the next authenticator when an expansion was forced to fail,
3034 contradicting the general specification for all authenticators. Instead it
3035 was generating a temporary error. It now behaves as specified.
3037 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3038 (the order specifies the preference for clients). The order is now AES256,
3039 AES128, 3DES, ARCFOUR128.
3041 31. Small patch to Sieve code - explicitly set From: when generating an
3044 32. Exim crashed if a remote delivery caused a very long error message to be
3045 recorded - for instance if somebody sent an entire SpamAssassin report back
3046 as a large number of 550 error lines. This bug was coincidentally fixed by
3047 increasing the size of one of Exim's internal buffers (big_buffer) that
3048 happened as part of the Exiscan merge. However, to be on the safe side, I
3049 have made the code more robust (and fixed the comments that describe what
3052 33. Some experimental protocols are using DNS PTR records for new purposes. The
3053 keys for these records are domain names, not reversed IP addresses. The
3054 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3055 leaves it alone. Component reversal etc. now happens only for IP addresses.
3058 34. The host_aton() function is supposed to be passed a string that is known
3059 to be a valid IP address. However, in the case of IPv6 addresses, it was
3060 not checking this. This is a hostage to fortune. Exim now panics and dies
3061 if the condition is not met. A case was found where this could be provoked
3062 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3063 components; fortuitously, this particular loophole had already been fixed
3064 by change 4.50/55 or 4.44/33 above.
3066 If there are any other similar loopholes, the new check in host_aton()
3067 itself should stop them being exploited. The report I received stated that
3068 data on the command line could provoke the exploit when Exim was running as
3069 exim, but did not say which command line option was involved. All I could
3070 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3071 running as the user.
3074 35. There was a buffer overflow vulnerability in the SPA authentication code
3075 (which came originally from the Samba project). I have added a test to the
3076 spa_base64_to_bits() function which I hope fixes it.
3079 36. The daemon start-up calls getloadavg() while still root for those OS that
3080 need the first call to be done as root, but it missed one case: when
3081 deliver_queue_load_max is set with deliver_drop_privilege. This is
3082 necessary for the benefit of the queue runner, because there is no re-exec
3083 when deliver_drop_privilege is set.
3085 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3086 was in use, was not putting the data itself into the right store pool;
3087 consequently, it could be overwritten for a subsequent message in the same
3088 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3091 38. Sometimes the final signoff response after QUIT could fail to get
3092 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3093 < 0 before doing a fflush(). This bug looks as though it goes back to the
3094 introduction of TLS in release 3.20, but "sometimes" must have been rare
3095 because the tests only now provoked it.
3101 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3102 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3103 Now it returns an integer. A number of calls were still expecting a T/F
3104 return. Fortuitously, in all cases, the tests worked in OK situations,
3105 which is the norm. However, things would have gone wrong on any write
3106 failures on the smtp file descriptor. This function is used when sending
3107 messages over SMTP and also when doing verify callouts.
3109 2. When Exim is called to do synchronous delivery of a locally submitted
3110 message (the -odf or -odi options), it no longer closes stderr before doing
3113 3. Implemented the mua_wrapper option.
3115 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3117 5. Implemented the functions header_remove(), header_testname(),
3118 header_add_at_position(), and receive_remove_recipient(), and exported them
3121 6. If an ACL "warn" statement specified the addition of headers, Exim already
3122 inserted X-ACL-Warn: at the start if there was no header name. However, it
3123 was not making this test for the second and subsequent header lines if
3124 there were newlines in the string. This meant that an invalid header could
3125 be inserted if Exim was badly configured.
3127 7. Allow an ACL "warn" statement to add header lines at the start or after all
3128 the Received: headers, as well as at the end.
3130 8. Added the rcpt_4xx retry error code.
3132 9. Added postmaster_mailfrom=xxx to callout verification option.
3134 10. Added mailfrom=xxxx to the callout verification option, for verify=
3137 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3138 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3140 12. Inserted some casts to stop certain compilers warning when using pointer
3141 differences as field lengths or precisions in printf-type calls (mostly
3142 affecting debugging statements).
3144 13. Added optional readline() support for -be (dynamically loaded).
3146 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3147 same clock tick as a message's arrival, so that its received time was the
3148 same as the "first fail" time on the retry record, and that message
3149 remained on the queue past the ultimate address timeout, every queue runner
3150 would try a delivery (because it was past the ultimate address timeout) but
3151 after another failure, the ultimate address timeout, which should have then
3152 bounced the address, did not kick in. This was a "< instead of <=" error;
3153 in most cases the first failure would have been in the next clock tick
3154 after the received time, and all would be well.
3156 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3157 being recognized when the domain list was tested by the match_domain
3158 condition in an expansion string.
3160 16. Added the ${str2b64: operator.
3162 17. Exim was always calling setrlimit() to set a large limit for the number of
3163 processes, without checking whether the existing limit was already
3164 adequate. (It did check for the limit on file descriptors.) Furthermore,
3165 errors from getrlimit() and setrlimit() were being ignored. Now they are
3166 logged to the main and panic logs, but Exim does carry on, to try to do its
3167 job under whatever limits there are.
3169 18. Imported PCRE 5.0.
3171 19. Trivial typo in log message " temporarily refused connection" (the leading
3174 20. If the log selector return_path_on_delivery was set and an address was
3175 redirected to /dev/null, the delivery process crashed because it assumed
3176 that a return path would always be set for a "successful" delivery. In this
3177 case, the whole delivery is bypassed as an optimization, and therefore no
3180 21. Internal re-arrangement: the function for sending a challenge and reading
3181 a response while authentication was assuming a zero-terminated challenge
3182 string. It's now changed to take a pointer and a length, to allow for
3183 binary data in such strings.
3185 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3187 23. Exim was not respecting finduser_retries when seeking the login of the
3188 uid under which it was called; it was always trying 10 times. (The default
3189 setting of finduser_retries is zero.) Also, it was sleeping after the final
3190 failure, which is pointless.
3192 24. Implemented tls_on_connect_ports.
3194 25. Implemented acl_smtp_predata.
3196 26. If the domain in control=submission is set empty, Exim assumes that the
3197 authenticated id is a complete email address when it generates From: or
3198 Sender: header lines.
3200 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3201 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3202 chown and chgrp in /bin and hostname in /usr/bin.
3204 28. Exim was keeping the "process log" file open after each use, just as it
3205 does for the main log. This opens the possibility of it remaining open for
3206 long periods when the USR1 signal hits a daemon. Occasional processlog
3207 errors were reported, that could have been caused by this. Anyway, it seems
3208 much more sensible not to leave this file open at all, so that is what now
3211 29. The long-running daemon process does not normally write to the log once it
3212 has entered its main loop, and it closes the log before doing so. This is
3213 so that log files can straightforwardly be renamed and moved. However,
3214 there are a couple of unusual error situations where the daemon does write
3215 log entries, and I had neglected to close the log afterwards.
3217 30. The text of an SMTP error response that was received during a remote
3218 delivery was being truncated at 512 bytes. This is too short for some of
3219 the long messages that one sometimes sees. I've increased the limit to
3222 31. It is now possible to make retry rules that apply only when a message has a
3223 specific sender, in particular, an empty sender.
3225 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3226 it possible to be selective about when SMTP synchronization is enforced.
3228 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3230 32. Implemented hosts_connection_nolog.
3232 33. Added an ACL for QUIT.
3234 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3237 35. Added mailbox_size and mailbox_filecount to appendfile.
3239 36. Added control = no_multiline_responses to ACLs.
3241 37. There was a bug in the logic of the code that waits for the clock to tick
3242 in the case where the clock went backwards by a substantial amount such
3243 that the microsecond fraction of "now" was more than the microsecond
3244 fraction of "then" (but the whole seconds number was less).
3246 38. Added support for the libradius Radius client library this is found on
3247 FreeBSD (previously only the radiusclient library was supported).
3253 1. When certain lookups returned multiple values in the form name=value, the
3254 quoting of the values was not always being done properly. Specifically:
3255 (a) If the value started with a double quote, but contained no whitespace,
3257 (b) If the value contained whitespace other than a space character (i.e.
3258 tabs or newlines or carriage returns) it was not quoted.
3259 This fix has been applied to the mysql and pgsql lookups by writing a
3260 separate quoting function and calling it from the lookup code. The fix
3261 should probably also be applied to nisplus, ibase and oracle lookups, but
3262 since I cannot test any of those, I have not disturbed their existing code.
3264 2. A hit in the callout cache for a specific address caused a log line with no
3265 reason for rejecting RCPT. Now it says "Previous (cached) callout
3266 verification failure".
3268 3. There was an off-by-one bug in the queryprogram router. An over-long
3269 return line was truncated at 256 instead of 255 characters, thereby
3270 overflowing its buffer with the terminating zero. As well as fixing this, I
3271 have increased the buffer size to 1024 (and made a note to document this).
3273 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3274 when Exim is waiting for an SMTP response from a remote server, Exim
3275 restarts its select() call on the socket, thereby resetting its timeout.
3276 This is not a problem when such interrupts are rare. Somebody set up a cron
3277 job to run exiwhat every 2 minutes, which is less than the normal select()
3278 timeout (5 or 10 minutes). This meant that the select() timeout never
3279 kicked in because it was always reset. I have fixed this by comparing the
3280 time when an interrupt arrives with the time at the start of the first call
3281 to select(). If more time than the timeout has elapsed, the interrupt is
3282 treated as a timeout.
3284 5. Some internal re-factoring in preparation for the addition of Sieve
3285 extensions (by MH). In particular, the "personal" test is moved to a
3286 separate function, and given an option for scanning Cc: and Bcc: (which is
3287 not set for Exim filters).
3289 6. When Exim created an email address using the login of the caller as the
3290 local part (e.g. when creating a From: or Sender: header line), it was not
3291 quoting the local part when it contained special characters such as @.
3293 7. Installed new OpenBSD configuration files.
3295 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3296 try to make them clearer.
3298 9. Callout options, other than the timeout value, were being ignored when
3299 verifying sender addresses in header lines. For example, when using
3301 verify = header_sender/callout=no_cache
3303 the cache was (incorrectly) being used.
3305 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3306 only the Cygwin environment.
3308 11. When return_path_on_delivery was set as a log selector, if different remote
3309 addresses in the same message used different return paths and parallel
3310 remote delivery occurred, the wrong values would sometimes be logged.
3311 (Whenever a remote delivery process finished, the return path value from
3312 the most recently started remote delivery process was logged.)
3314 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3315 lines when AUTH and/or TLS are in use. This is the "received protocol"
3316 field. Exim used to use "asmtp" for authenticated SMTP, without any
3317 indication (in the protocol name) for TLS use. Now it follows the RFC and
3318 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3319 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3320 names appear in log lines as well as in Received: header lines.
3322 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3323 extensions, and comparison tests, and to fix some bugs.
3325 14. Changes to the "personal" filter test:
3327 (1) The test was buggy in that it was just doing the equivalent of
3328 "contains" tests on header lines. For example, if a user's address was
3329 anne@some.where, the "personal" test would incorrectly be true for
3331 To: susanne@some.where
3333 This test is now done by extracting each address from the header in turn,
3334 and checking the entire address. Other tests that are part of "personal"
3335 are now done using regular expressions (for example, to check local parts
3336 of addresses in From: header lines).
3338 (2) The list of non-personal local parts in From: addresses has been
3339 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3340 taken from the Sieve specification recommendations.
3342 (3) If the message contains any header line starting with "List-" it is
3343 treated as non-personal.
3345 (4) The test for "circular" in the Subject: header line has been removed
3346 because it now seems ill-conceived.
3348 15. Minor typos in src/EDITME comments corrected.
3350 16. Installed latest exipick from John Jetmore.
3352 17. If headers_add on a router specified a text string that was too long for
3353 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3354 of string_sprintf() is now avoided.
3356 18. $message_body_size was not set (it was always zero) when running the DATA
3357 ACL and the local_scan() function.
3359 19. For the "mail" command in an Exim filter, no default was being set for
3360 the once_repeat time, causing a random time value to be used if "once" was
3361 specified. (If the value happened to be <= 0, no repeat happened.) The
3362 default is now 0s, meaning "never repeat". The "vacation" command was OK
3363 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3364 (I found it when inspecting the code).
3366 20. There is now an overall timeout for performing a callout verification. It
3367 defaults to 4 times the callout timeout, which applies to individual SMTP
3368 commands during the callout. The overall timeout applies when there is more
3369 than one host that can be tried. The timeout is checked before trying the
3370 next host. This prevents very long delays if there are a large number of
3371 hosts and all are timing out (e.g. when the network connections are timing
3372 out). The value of the overall timeout can be changed by specifying an
3373 additional sub-option for "callout", called "maxwait". For example:
3375 verify = sender/callout=5s,maxwait=20s
3377 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3378 to the end before writing, but this should make it even safer).
3380 22. Exim was forgetting that it had advertised PIPELINING for the second and
3381 subsequent messages on an SMTP connection. It was also not resetting its
3382 memory on STARTTLS and an internal HELO.
3384 23. When Exim logs an SMTP synchronization error within a session, it now
3385 records whether PIPELINING has been advertised or not.
3387 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3388 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3389 rather than long int.
3391 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3393 26. Added the never_mail option to autoreply.
3399 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3400 crash if the getsockname() call failed; this can happen if a connection is
3401 closed very soon after it is established. The problem was simply in the
3402 order in which certain operations were done, causing Exim to try to write
3403 to the SMTP stream before it had set up the file descriptor. The bug has
3404 been fixed by making things happen in the correct order.
3410 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3411 before the connection was closed, thus losing the rejection response.
3413 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3414 some early Solaris releases, but causes trouble in current releases where
3415 socklen_t is defined.
3417 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3420 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3423 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3424 that releasing the top of it at the end releases what was used for sub-
3425 expansions (unless the block got too big). However, discard this block if
3426 the first thing is a variable or header, so that we can use its block when
3427 it is dynamic (useful for very large $message_headers, for example).
3429 6. Lookups now cache *every* query, not just the most recent. A new, separate
3430 store pool is used for this. It can be recovered when all lookup caches are
3431 flushed. Lookups now release memory at the end of their result strings.
3432 This has involved some general refactoring of the lookup sources.
3434 7. Some code has been added to the store_xxx() functions to reduce the amount
3435 of flapping under certain conditions.
3437 8. log_incoming_interface used to affect only the <= reception log lines. Now
3438 it causes the local interface and port to be added to several more SMTP log
3439 lines, for example "SMTP connection from", and rejection lines.
3441 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3443 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3445 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3446 could be overwritten at the end of the current message (or the start of a
3447 new message if it was set in a HELO ACL). The value is now preserved for
3448 the duration of the SMTP connection.
3450 12. If a transport had a headers_rewrite setting, and a matching header line
3451 contained an unqualified address, that address was qualified, even if it
3452 did not match any rewriting rules. The underlying bug was that the values
3453 of the flags that permit the existence of unqualified sender and recipient
3454 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3455 non-local messages, and by -bnq for local messages) were not being
3456 preserved with the message after it was received.
3458 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3459 "next input=" as part of the text comprising the host identity instead of
3460 the correct text. The code was using the same buffer for two different
3461 strings. However, depending on which order the printing function evaluated
3462 its arguments, the bug did not always show up. Under Linux, for example, my
3463 test suite worked just fine.
3465 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3466 doesn't work with some older versions of Perl. It has been changed to "my",
3467 which in any case is probably the better facility to use.
3469 15. A really picky compiler found some instances of statements for creating
3470 error messages that either had too many or two few arguments for the format
3473 16. The size of the buffer for calls to the DNS resolver has been increased
3474 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3475 for addresses that have a lot of PTR records. This alleviates a problem; it
3476 does not fully solve it.
3478 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3479 buffer now truncates the list and logs the incident, which is the same
3480 action as happens when Exim is looking up a host name and its aliases.
3481 Previously in this situation something unpredictable would happen;
3482 sometimes it was "internal error: store_reset failed".
3484 18. If a server dropped the connection unexpectedly when an Exim client was
3485 using GnuTLS and trying to read a response, the client delivery process
3486 crashed while trying to generate an error log message.
3488 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3489 string, for example:
3491 warn message = H1: something\nH2: something
3493 the text was added as a single header line from Exim's point of view
3494 though it ended up OK in the delivered message. However, searching for the
3495 second and subsequent header lines using $h_h2: did not work. This has been
3496 fixed. Similarly, if a system filter added multiple headers in this way,
3497 the routers could not see them.
3499 20. Expanded the error message when iplsearch is called with an invalid key to
3500 suggest using net-iplsearch in a host list.
3502 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3503 ACLs are no longer actually imposed (and a message to that effect is
3506 22. If a "gecos" field in a passwd entry contained escaped characters, in
3507 particular, if it contained a \" sequence, Exim got it wrong when building
3508 a From: or a Sender: header from that name. A second bug also caused
3509 incorrect handling when an unquoted " was present following a character
3510 that needed quoting.
3512 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3513 was not being matched caselessly.
3515 24. Arranged for all hyphens in the exim.8 source to be escaped with
3518 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3519 properly. Recipient callout cache records were still being keyed to include
3520 the sender, even when use_sender was set false. This led to far more
3521 callouts that were necessary. The sender is no longer included in the key
3522 when use_sender is false.
3524 26. Added "control = submission" modifier to ACLs.
3526 27. Added the ${base62d: operator to decode base 62 numbers.
3528 28. dnsdb lookups can now access SRV records.
3530 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3531 the configuration file.
3533 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3534 (-v) mode. This makes the output for a verbose queue run more intelligible.
3536 31. Added a use_postmaster feature to recipient callouts.
3538 32. Added the $body_zerocount variable, containing the number of binary zero
3539 bytes in the message body.
3541 33. The time of last modification of the "new" subdirectory is now used as the
3542 "mailbox time last read" when there is a quota error for a maildir
3545 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3547 35. Added +ignore_unknown as a special item in host lists.
3549 36. Code for decoding IPv6 addresses in host lists is now included, even if
3550 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3551 address was recognized as an IP address, but was then not correctly decoded
3552 into binary, causing unexpected and incorrect effects when compared with
3559 1. Very minor rewording of debugging text in manualroute to say "list of
3560 hosts" instead of "hostlist".
3562 2. If verify=header_syntax was set, and a header line with an unqualified
3563 address (no domain) and a large number of spaces between the end of the
3564 name and the colon was received, the reception process suffered a buffer
3565 overflow, and (when I tested it) crashed. This was caused by some obsolete
3566 code that should have been removed. The fix is to remove it!
3568 3. When running in the test harness, delay a bit after writing a bounce
3569 message to get a bit more predictability in the log output.
3571 4. Added a call to search_tidyup() just before forking a reception process. In
3572 theory, someone could use a lookup in the expansion of smtp_accept_max_
3573 per_host which, without the tidyup, could leave open a database connection.
3575 5. Added the variables $recipient_data and $sender_data which get set from a
3576 lookup success in an ACL "recipients" or "senders" condition, or a router
3577 "senders" option, similar to $domain_data and $local_part_data.
3579 6. Moved the writing of debug_print from before to after the "senders" test
3582 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3583 problems for message scanning, either using a data ACL, or using
3584 local_scan() because the Received: header was not generated till after they
3585 were called (in order to set the time as the time of reception completion).
3586 I have revised the way this works. The header is now generated after the
3587 body is received, but before the ACL or local_scan() are called. After they
3588 are run, the timestamp in the header is updated.
3594 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3595 before starting a queue runner without re-exec. This happened only when
3596 deliver_drop_privilege was set or when the Exim user was set to root. The
3597 effect of the bug was that timeouts during subsequent deliveries caused
3598 crashes instead of being properly handled. The handler is now left at its
3599 default (and expected) setting.
3601 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3602 message, again when deliver_drop_privilege is set or Exim is run as root.
3603 The bug described in (1) was not present in this case, but the tidying up
3604 of the other signals was missing. I have made the two cases consistent.
3606 3. The ignore_target_hosts setting on a manualroute router was being ignored
3607 for hosts that were looked up using the /MX notation.
3609 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3612 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3613 operated on the sender address. After changing the $sender_address to <>
3614 for the sender address verify, Exim was re-instated it as the original
3615 (before rewriting) address, but remembering that it had rewritten it, so it
3616 wasn't rewriting it again. This bug also had the effect of breaking the
3617 sender address verification caching when the sender address was rewritten.
3619 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3620 This has been changed so that if the ip literal address matches
3621 ignore_target_hosts, the router declines.
3623 7. Added expansion conditions match_domain, match_address, and match_local_
3624 part (NOT match_host).
3626 8. The placeholder for the Received: header didn't have a length field set.
3628 9. Added code to Exim itself and to exim_lock to test for a specific race
3629 condition that could lead to file corruption when using MBX delivery. The
3630 issue is with the lockfile that is created in /tmp. If this file is removed
3631 after a process has opened it but before that process has acquired a lock,
3632 there is the potential for a second process to recreate the file and also
3633 acquire a lock. This could lead to two Exim processes writing to the file
3634 at the same time. The added code performs the same test as UW imapd; it
3635 checks after acquiring the lock that its file descriptor still refers to
3636 the same named file.
3638 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3639 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3642 11. Added the smtp_active_hostname option. If used, this will typically be made
3643 to depend on the incoming interface address. Because $interface_address is
3644 not set up until the daemon has forked a reception process, error responses
3645 that can happen earlier (such as "too many connections") no longer contain
3648 12. If an expansion in a condition on a "warn" statement fails because a lookup
3649 defers, the "warn" statement is abandoned, and the next ACL statement is
3650 processed. Previously this caused the whole ACL to be aborted.
3652 13. Added the iplsearch lookup type.
3654 14. Added ident_timeout as a log selector.
3656 15. Added tls_certificate_verified as a log selector.
3658 16. Added a global option tls_require_ciphers (compare the smtp transport
3659 option of the same name). This controls incoming TLS connections.
3661 17. I finally figured out how to make tls_require_ciphers do a similar thing
3662 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3663 before starting the TLS session.
3665 18. Tabs are now shown as \t in -bP output.
3667 19. If the log selector return_path_on_delivery was set, Exim crashed when
3668 bouncing a message because it had too many Received: header lines.
3670 20. If two routers both had headers_remove settings, and the first one included
3671 a superfluous trailing colon, the final name in the first list and the
3672 first name in the second list were incorrectly joined into one item (with a
3673 colon in the middle).
3679 1. Added -C and -D options to the exinext utility, mainly to make it easier
3680 to include in the automated testing, but these could be helpful when
3681 multiple configurations are in use.
3683 2. The exinext utility was not formatting the output nicely when there was
3684 an alternate port involved in the retry record key, nor when there was a
3685 message id as well (for retries that were specific to a specific message
3686 and a specific host). It was also confused by IPv6 addresses, because of
3687 the additional colons they contain. I have fixed the IPv4 problem, and
3688 patched it up to do a reasonable job for IPv6.
3690 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3691 delivery, the log line now contains "pipelined" if PIPELINING was used.
3693 4. An SMTP transport process used to panic and die if the bind() call to set
3694 an explicit outgoing interface failed. This has been changed; it is now
3695 treated in the same way as a connect() failure.
3697 5. A reference to $sender_host_name in the part of a conditional expansion
3698 that was being skipped was still causing a DNS lookup. This no longer
3701 6. The def: expansion condition was not recognizing references to header lines
3702 that used bh_ and bheader_.
3704 7. Added the _cache feature to named lists.
3706 8. The code for checking quota_filecount in the appendfile transport was
3707 allowing one more file than it should have been.
3709 9. For compatibility with Sendmail, the command line option
3717 and sets the incoming protocol and host name (for trusted callers). The
3718 host name and its colon can be omitted when only the protocol is to be set.
3719 Note the Exim already has two private options, -pd and -ps, that refer to
3720 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3721 "s", but I don't think that's a major issue.
3723 10. A number of refactoring changes to the code, none of which should affect
3726 (a) The number of logging options was getting close to filling up the
3727 32-bit word that was used as a bit map. I have split them into two classes:
3728 those that are passed in the argument to log_write(), and those that are
3729 only ever tested independently outside of that function. These are now in
3730 separate 32-bit words, so there is plenty of room for expansion again.
3731 There is no change in the user interface or the logging behaviour.
3733 (b) When building, for example, log lines, the code previously used a
3734 macro that called string_cat() twice, in order to add two strings. This is
3735 not really sufficiently general. Furthermore, there was one instance where
3736 it was actually wrong because one of the argument was used twice, and in
3737 one call a function was used. (As it happened, calling the function twice
3738 did not affect the overall behaviour.) The macro has been replaced by a
3739 function that can join an arbitrary number of extra strings onto a growing
3742 (c) The code for expansion conditions now uses a table and a binary chop
3743 instead of a serial search (which was left over from when there were very
3744 few conditions). Also, it now recognizes conditions like "pam" even when
3745 the relevant support is not compiled in: a suitably worded error message is
3746 given if an attempt is made to use such a condition.
3748 11. Added ${time_interval:xxxxx}.
3750 12. A bug was causing one of the ddress fields not to be passed back correctly
3751 from remote delivery subprocesses. The field in question was not being
3752 subsequently used, so this caused to problems in practice.
3754 13. Added new log selectors queue_time and deliver_time.
3756 14. Might have fixed a bug in maildirsizefile handling that threw up
3757 "unexpected character" debug warnings, and recalculated the data
3758 unnecessarily. In any case, I expanded the warning message to give more
3761 15. Added the message "Restricted characters in address" to the statements in
3762 the default ACL that block characters like @ and % in local parts.
3764 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3765 Three changes have been made:
3767 (a) There was a serious bug; a negative response to MAIL caused the whole
3768 recipient domain to be cached as invalid, thereby blocking all messages
3769 to all local parts at the same domain, from all senders. This bug has
3770 been fixed. The domain is no longer cached after a negative response to
3771 MAIL if the sender used is not empty.
3773 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3776 (c) A new callout option, "use_sender" has been added for people who want
3777 the modified behaviour.
3783 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3786 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3787 indeed breaks things for older releases.
3789 3. Added additional logging to the case where there is a problem reading data
3790 from a filter that is running in a subprocess using a pipe, in order to
3791 try to track down a specific problem.
3793 4. Testing facility fudge: when running in the test harness and attempting
3794 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3795 getting "No route to host". Convert this to a timeout.
3797 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3800 6. Some OS don't have socklen_t but use size_t instead. This affects the
3801 fifth argument of getsockopt() amongst other things. This is now
3802 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3803 can be set for individual OS. I have set it for SunOS5, OSF1, and
3804 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3805 some earlier ones do not.
3807 7. Change 4.30/15 was not doing the test caselessly.
3809 8. The standard form for an IPv6 address literal was being rejected by address
3810 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3811 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3812 this, as well as the form without the "IPv6" on the front (but only when
3813 address literals are enabled, of course).
3815 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3817 10. Exim crashed if a message with an empty sender address specified by -f
3818 encountered a router with an errors_to setting. This could be provoked only
3819 by a command such as
3823 where an empty string was supplied; "<>" did not hit this bug.
3825 11. Installed PCRE release 4.5.
3827 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3828 remained set. It is now erased.
3830 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3831 times from message ids (which are base 36 rather than the normal 62).
3833 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3834 were being counted as actual protocol errors, and logged if the log
3835 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3836 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3837 and DATA following a set of rejected RCPTs do not count as protocol errors.
3838 In other words, Exim assumes they were pipelined, though this may not
3839 actually be the case. Of course, in all cases the client gets an
3840 appropriate error code.
3842 15. If a lookup fails in an ACL condition, a message about the failure may
3843 be available; it is used if testing the ACL cannot continue, because most
3844 such messages specify what the cause of the deferral is. However, some
3845 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3846 that caused an old message to be retained and used if a later statement
3847 caused a defer, replacing the real cause of the deferral.
3849 16. If an IP address had so many PTR records that the DNS lookup buffer
3850 was not large enough to hold them, Exim could crash while trying to process
3851 the truncated data. It now detects and logs this case.
3853 17. Further to 4.21/58, another change has been made: if (and only if) the
3854 first line of a message (the first header line) ends with CRLF, a bare LF
3855 in a subsequent header line has a space inserted after it, so as not to
3856 terminate the header.
3858 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3859 unnecessarily, used atoi() instead of strtol(), and didn't check the
3860 termination when getting file sizes from file names by regex.
3862 19. Completely re-implemented the support for maildirsize files, in the light
3863 of a number of problems with the previous contributed implementation
3864 (4.30/29). In particular:
3866 . If the quota is zero, the maildirsize file is maintained, but no quota is
3869 . If the maildir directory does not exist, it is created before any attempt
3870 to write a maildirsize file.
3872 . The quota value in the file is just a cache; if the quota is changed in
3873 the transport, the new value overrides.
3875 . A regular expression is available for excluding directories from the
3878 20. The autoreply transport checks the characters in options that define the
3879 message's headers; it allows continued headers, but it was checking with
3880 isspace() after an embedded newline instead of explicitly looking for a
3883 21. If all the "regular" hosts to which an address was routed had passed their
3884 expiry times, and had not reached their retry times, the address was
3885 bounced, even if fallback hosts were defined. Now Exim should go on to try
3888 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3889 equivalent code in the SMTP transport. Some hosts send humungous responses
3890 to HELO/EHLO, more than 1024 it seems.
3892 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3893 gives compiler warnings in some environments. I've now done it "properly",
3896 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3897 (because of problems with the built-in one) was declared to return uschar *
3898 instead of char *, causing compiler failure.
3900 25. Fixed a file descriptor leak when processing alias/forward files.
3902 26. Fixed a minor format string issue in dbfn.c.
3904 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3906 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3907 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3910 29. When a sender address is verified, it is cached, to save repeating the test
3911 when there is more than one recipient in a message. However, when the
3912 verification involves a callout, it is possible for different callout
3913 options to be set for different recipients. It is too complicated to keep
3914 track of this in the cache, so now Exim always runs a verification when a
3915 callout is required, relying on the callout cache for the optimization.
3916 The overhead is duplication of the address routing, but this should not be
3919 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3920 to be verified with callout=postmaster, and the main callout worked but the
3921 postmaster check failed, the verification correctly failed. However, if a
3922 subsequent RCPT command asked for sender verification *without* the
3923 postmaster check, incorrect caching caused this verification also to fail,
3926 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3927 it was not caching the DNS options (qualify_single, search_parents) that
3928 were used when the lookup failed. A subsequent lookup with different
3929 options therefore always gave the same answer, though there were cases
3930 where it should not have. (Example: a "domains = !$mx_any" option on a
3931 dnslookup router: the "domains" option is always processed without any
3932 widening, but the router might have qualify_single set.) Now Exim uses the
3933 cached value only when the same options are set.
3935 32. Added John Jetmore's "exipick" utility to the distribution.
3937 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3938 than a timeout (e.g. a certificate is required, and is not provided), an
3939 Exim server now closes the connection immediately. Previously it waited for
3940 the client to close - but if the client is SSL, it seems that they each
3941 wait for each other, leading to a delay before one of them times out.
3943 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3944 maintained 0.8.x compatibility because I don't think many are using it, and
3945 it is clearly obsolete.
3947 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3950 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3951 client certificate was expired. A simple patch fixes this, though I don't
3952 understand the full logic of why the verify callback is called multiple
3955 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3956 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3957 which causes problems with some clients (such as the Certicom SSL Plus
3958 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3959 disables the coutermeasure allowing Eudora to connect."
3961 38. Exim was not checking that a write() to a log file succeeded. This could
3962 lead to Bad Things if a log got too big, in particular if it hit a file
3963 size limit. Exim now panics and dies if it cannot write to a log file, just
3964 as it does if it cannot open a log file.
3966 39. Modified OS/Makefile-Linux so that it now contains
3968 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3970 The two -D definitions ensure that Exim is compiled with large file
3971 support, which makes it possible to handle log files that are bigger than
3974 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3975 instance) a domain was checked against a named list that involved a lookup,
3976 causing $domain_data to be set, then another domain was checked against the
3977 same list, then the first domain was re-checked, the value of $domain_data
3978 after the final check could be wrong. In particular, if the second check
3979 failed, it could be set empty. This bug probably also applied to
3982 41. The strip_trailing_dot option was not being applied to the address given
3983 with the -f command-line option.
3985 42. The code for reading a message's header from the spool was incrementing
3986 $received_count, but never initializing it. This meant that the value was
3987 incorrect (doubled) while delivering a message in the same process in which
3988 it was received. In the most common configuration of Exim, this never
3989 happens - a fresh exec is done - but it can happen when
3990 deliver_drop_privilege is set.
3992 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3993 it now includes up to 150 characters of the unexpected data in the log
3996 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3997 and building data strings. The size of both of these buffers was 10 000
3998 bytes - far larger than anybody would *ever* want, thought I. Needless to
3999 say, somebody hit the limit. I have increased the maximum line length to
4000 20 000 and the maximum data length of concatenated lines to 100 000. I have
4001 also fixed two bugs, because there was no checking on these buffers. Tsk,
4002 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4003 buffer is too small.
4005 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4006 lsearch lookups. Now it does.
4008 46. When parsing a route_list item in a manualroute router, a fixed-length
4009 buffer was used for the list of hosts. I made this 1024 bytes long,
4010 thinking that nobody would ever have a list of hosts that long. Wrong.
4011 Somebody had a whole pile of complicated expansion conditions, and the
4012 string was silently truncated, leading to an expansion error. It turns out
4013 that it is easier to change to an unlimited length (owing to other changes
4014 that have happened since this code was originally written) than to build
4015 structure for giving a limitation error. The length of the item that
4016 expands into the list of hosts is now unlimited.
4018 47. The lsearch lookup could not handle data where the length of text line was
4019 more than 4095 characters. Such lines were truncated, leading to shortened
4020 data being returned. It should now handle lines of any length.
4022 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4023 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4026 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4027 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4028 no longer happens in comment lines. A list of replacements is now placed
4029 at the head of all of the source files, except those whose only change is
4030 to replace PERL_COMMAND in the very first #! line.
4032 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4033 messages on the queue, with a bottom-up merge sort, using code contributed
4034 by Michael Haardt. This should make operations like -bp somewhat faster on
4035 large queues. It won't affect queue runners, except when queue_run_in_order
4038 51. Installed eximstats 1.31 in the distribution.
4040 52. Added support for SRV lookups to the dnslookup router.
4042 53. If an ACL referred to $message_body or $message_body_end, the value was not
4043 reset for any messages that followed in the same SMTP session.
4045 54. The store-handling optimization for building very long strings was not
4046 differentiating between the different store pools. I don't think this
4047 actually made any difference in practice, but I've tidied it.
4049 55. While running the routers to verify a sender address, $sender_address
4050 was still set to the sender address. This is wrong, because when routing to
4051 send a bounce to the sender, it would be empty. Therefore, I have changed
4052 it so that, while verifying a sender address, $sender_address is set to <>.
4053 (There is no change to what happens when verifying a recipient address.)
4055 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4056 target A or AAAA records (if not already returned) without resetting the
4057 qualify_single or search_parents options of the DNS resolver. These are
4058 inappropriate in this case because the targets of MX and SRV records must
4059 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4060 target that, when qualified, matched something in the local domain. These
4061 two options are now turned off when doing these lookups.
4063 57. It seems that at least some releases of Reiserfs (which does not have the
4064 concept of a fixed number of inodes) returns zero and not -1 for the
4065 number of available inodes. This interacted badly with check_spool_inodes,
4066 which assumed that -1 was the "no such thing" setting. What I have done is
4067 to check that the total number of inodes is greater than zero before doing
4068 the test of how many are available.
4070 58. When a "warn" ACL statement has a log_message modifier, the message is
4071 remembered, and not repeated. This is to avoid a lot of repetition when a
4072 message has many recipients that cause the same warning to be written.
4073 Howewer, Exim was preserving the list of already written lines for an
4074 entire SMTP session, which doesn't seem right. The memory is now reset if a
4075 new message is started.
4077 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4078 debugging output unless log_rewrite was also set.
4080 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4081 of (int)(handle) when we know that handle contains (void *)(-1).
4083 61. The Exim daemon panic-logs an error return when it closes the incoming
4084 connection. However "connection reset by peer" seems to be common, and
4085 isn't really an error worthy of noting specially, so that particular error
4088 62. When Exim is trying to find all the local interfaces, it used to panic and
4089 die if the ioctl to get the interface flags failed. However, it seems that
4090 on at least one OS (Solaris 9) it is possible to have an interface that is
4091 included in the list of interfaces, but for which you get a failure error
4092 for this call. This happens when the interface is not "plumbed" into a
4093 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4094 failure of the "get flags" call assumes that the interface is down.
4096 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4097 makes life easier for people who are doing arithmetic on fields extracted
4098 from dates, where you often get leading zeros that should not be
4099 interpreted as octal.
4101 64. Added qualify_domain to the redirect router, to override the global
4104 65. If a pathologically long header line contained very many addresses (the
4105 report of this problem mentioned 10 000) and each of them was rewritten,
4106 Exim could use up a very large amount of memory. (It kept on making new
4107 copies of the header line as it rewrote, and never released the old ones.)
4108 At the expense of a bit more processing, the header rewriting function has
4109 been changed so that it no longer eats memory in this way.
4111 66. The generation of the Received: header has been moved from the time that a
4112 message starts to be received, to the time that it finishes. The timestamp
4113 in the Received: header should now be very close to that of the <= log
4114 line. There are two side-effects of this change:
4116 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4117 logged header lines no longer include the local Received: line, because
4118 it has not yet been created. The same applies to a copy of the message
4119 that is returned to a non-SMTP sender when a message is rejected.
4121 (b) When a filter file is tested using -bf, no additional Received: header
4122 is added to the test message. After some thought, I decided that this
4125 This change does not affect the value of $received_for. It is still set
4126 after address rewriting, but before local_scan() is called.
4128 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4130 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4131 gave an unhelpful panic error message, and a defer error. I have managed to
4132 change this behaviour so that it now rejects any supplied certificate,
4133 which seems right, as the list of acceptable certificates is empty.
4135 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4136 gave an unhelpful defer error. I have not managed to make this reject any
4137 supplied certificates, but the error message it gives is "no certificate
4138 supplied", which is not helpful.
4140 70. exigrep's output now also includes lines that are not associated with any
4141 message, but which match the given pattern. Implemented by a patch from
4142 Martin Sluka, which also tidied up the Perl a bit.
4144 71. Recipient callout verification, like sender verification, was using <> in
4145 the MAIL FROM command. This isn't really the right thing, since the actual
4146 sender may affect whether the remote host accepts the recipient or not. I
4147 have changed it to use the actual sender in the callout; this means that
4148 the cache record is now keyed on a recipient/sender pair, not just the
4149 recipient address. There doesn't seem to be a real danger of callout loops,
4150 since a callout by the remote host to check the sender would use <>.
4151 [SEE ABOVE: changed after hitting problems.]
4153 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4154 temporary errors. However, in the case of such a code being given after
4155 the end of a data transmission (i.e. after ".") Exim was failing to write
4156 a retry record for the message. (Yes, there was some broken host that was
4157 actually sending 8xx at this point.)
4159 73. An unknown lookup type in a host list could cause Exim to panic-die when
4160 the list was checked. (An example that provoked this was putting <; in the
4161 middle of a list instead of at the start.) If this happened during a DATA
4162 ACL check, a -D file could be left lying around. This kind of configuration
4163 error no longer causes Exim to die; instead it causes a defer errror. The
4164 incident is still logged to the main and panic logs.
4166 74. Buglet left over from Exim 3 conversion. The message "too many messages
4167 in one connection" was written to the rejectlog but not the mainlog, except
4168 when address rewriting (yes!) was being logged.
4170 75. Added write_rejectlog option.
4172 76. When a system filter was run not as root (that is, when system_filter_user
4173 was set), the values of the $n variables were not being returned to the
4174 main process; thus, they were not subsequently available in the $sn
4177 77. Added +return_path_on_delivery log selector.
4179 78. A connection timeout was being treated differently from recipients deferred
4180 when testing hosts_max_try with a message that was older than the host's
4181 retry timeout. (The host should not be counted, thus allowing all hosts to
4182 be tried at least once before bouncing.) This may have been the cause of an
4183 occasionally reported bug whereby a message would remain on the queue
4184 longer than the retry timeout, but would be bounced if a delivery was
4185 forced. I say "may" because I never totally pinned down the problem;
4186 setting up timeout/retry tests is difficult. See also the next item.
4188 79. The ultimate address timeout was not being applied to errors that involved
4189 a combination of host plus message (for example, a timeout on a MAIL
4190 command). When an address resolved to a number of possible hosts, and they
4191 were not all tried for each delivery (e.g. because of hosts_max_try), a
4192 message could remain on the queue longer than the retry timeout.
4194 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4197 81. Fixed an obscure SMTP outgoing bug which required at least the following
4198 conditions: (a) there was another message waiting for the same server;
4199 (b) the server returned 5xx to all RCPT commands in the first message so
4200 that the message was not completed; (c) the server dropped the connection
4201 or gave a negative response to the RSET that Exim sends to abort the
4202 transaction. The observed case was a dropped connection after DATA that had
4203 been sent in pipelining mode. That is, the server had advertised PIPELINING
4204 but was not implementing it correctly. The effect of the bug was incorrect
4205 behaviour, such as trying another host, and this could lead to a crash.
4211 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4212 and daemon.c were passed as pointers to ints; they should have been
4213 pointers to socklen_t variables (which are typically unsigned ints).
4215 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4218 3. Fixed a really odd bug that affected only the testing scheme; patching a
4219 certain fixed string in the binary changed the value of another string that
4220 happened to be identical to the end of the original first string.
4222 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4223 name", it returns that address as the IP address. On some operating
4224 systems (e.g. Solaris), it also passes back the IP address string as the
4225 "host name". However, on others (e.g. Linux), it passes back an empty
4226 string. Exim wasn't checking for this, and was changing the host name to an
4227 empty string, assuming it had been canonicized.
4229 5. Although rare, it is permitted to have more than one PTR record for a given
4230 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4231 all the names associated with an address, because they do in Solaris.
4232 However, it seems that they do not in Linux for data that comes from the
4233 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4234 I found this out when I moved to a new Linux workstation and tried to run
4235 the Exim test suite.
4237 To get round this problem I have changed the code so that it now does its
4238 own call to the DNS to look up PTR records when searching for a host name.
4239 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4240 addresses that are only in /etc/hosts are still found.
4242 This behaviour is, however, controlled by an option called host_lookup_
4243 order, which defaults to "bydns:byaddr". If people want to use the other
4244 order, or indeed, just use one or the other means of lookup, they can
4245 specify it in this variable.
4247 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4248 some operating systems, this comes back from gethostbyaddr() as an empty
4249 string, and this is what Exim used to test for. However, it seems that in
4250 other systems, "." is yielded. Exim now tests for this case too.
4252 7. The values of check_spool_space and check_log_space are now held internally
4253 as a number of kilobytes instead of an absolute number of bytes. If a
4254 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4255 kilobyte. This means that much larger values can be stored.
4257 8. Exim monitor: an attempt to get the action menu when not actually pointing
4258 at a message produces an empty menu entitled "No message selected". This
4259 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4260 no entries in it ("Shell widget menu has zero width and/or height"). So I
4261 have added a single, blank menu entry in this case.
4263 9. Added ${quote_local_part.
4265 10. MIME decoding is now applied to the contents of Subject: header lines when
4268 11. Now that a reference to $sender_host_address automatically causes a reverse
4269 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4270 host lookup before query-style lookups in lists that might use this
4271 variable. This has therefore been abolished, and the "net-" prefix is no
4272 longer necessary for query-style lookups.
4274 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4275 have been a typo for LFLAGS, so it has been changed.
4277 13. The install script calls Exim with "-C /dev/null" in order to find the
4278 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4279 to be output. Howeve, since Exim outputs its version number before the
4280 error, it didn't break the script. It just looked ugly. I fixed this by
4281 always allowing "-C /dev/null" if the caller is root.
4283 14. Ignore overlarge ACL variable number when reading spool file - insurance
4284 against a later release with more variables having written the file.
4286 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4287 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4288 this, as well as the form without the "IPv6" on the front.
4290 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4291 OS/Makefile-Darwin file.
4293 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4294 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4296 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4297 variable. However, some OS use ints for inodes. I've added cast to long int
4298 to get rid of the compiler warning.
4300 19. I had forgotten to lock out "/../" in configuration file names when
4301 ALT_CONFIG_PREFIX was set.
4303 20. Routers used for verification do not need to specify transports. However,
4304 if such a router generated a host list, and callout was configured, Exim
4305 crashed, because it could not find a port number from the (non-existent)
4306 transport. It now assumes port 25 in this circumstance.
4308 21. Added the -t option to exigrep.
4310 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4311 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4312 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4313 them is set, LOOKUP_LSEARCH is forced.
4315 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4317 24. Added sender and host information to the "rejected by local_scan()" log
4318 line; previously there was no indication of these.
4320 25. Added .include_if_exists.
4322 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4323 Linux. It turns out that not all file systems support this. Apparently some
4324 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4325 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4326 not supported on the file descriptor, is now ignored when Exim is trying to
4327 sync a directory. This applies only to Linux.
4329 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4331 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4332 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4335 29. Added support for maildirsize files from supplied patch (modified a bit).
4337 30. The use of :fail: followed by an empty string could lead Exim to respond to
4338 sender verification failures with (e.g.):
4340 550 Verification failed for <xxx>
4341 550 Sender verify failed
4343 where the first response line was missing the '-' that indicates it is not
4344 the final line of the response.
4346 31. The loop for finding the name of the user that called Exim had a hardwired
4347 limit of 10; it now uses the value of finduser_retries, which is used for
4348 all other user lookups.
4350 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4353 33. Exim was neglecting to zero errno before one call of strtol() when
4354 expanding a string and expecting an integer value. On some systems this
4355 resulted in spurious "integer overflow" errors. Also, it was casting the
4356 result into an int without checking.
4358 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4359 did not work. The code looks as if it has *never* worked, though it appears
4360 to have been documented since at least releast 1.62. I have made it work.
4362 35. The "timeout_DNS" error in retry rules, also documented since at least
4363 1.62, also never worked. As it isn't clear exactly what this means, and
4364 clearly it isn't a major issue, I have abolished the feature by treating it
4365 as "timeout", and writing a warning to the main and panic logs.
4367 36. The display of retry rules for -brt wasn't always showing the error code
4370 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4371 timeout_connect_A, timeout_connect_MX.
4373 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4374 to the empty sender.
4376 39. The daemon was not analysing the content of -oX till after it had closed
4377 stderr and disconnected from the controlling terminal. This meant that any
4378 syntax errors were only noted on the panic log, and the return code from
4379 the command was 0. By re-arranging the code a little, I've made the
4380 decoding happen first, so such errors now appear on stderr, and the return
4381 code is 1. However, the actual setting up of the sockets still happens in
4382 the disconnected process, so errors there are still only recorded on the
4385 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4386 connections (as happens on some IP stacks) was logged at start up time as
4387 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4388 it from "IPv6 and IPv4", which means that two separate sockets are being
4391 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4392 says whether AF_INET or AF_INET6 was passed as an argument.
4394 42. Exiwhat output was messed up when time zones were included in log
4397 43. Exiwhat now gives more information about the daemon's listening ports,
4398 and whether -tls-on-connect was used.
4400 44. The "port" option of the smtp transport is now expanded.
4402 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4403 silently ignored. Now an error message is written to the main and panic
4406 46. There's a new ACL modifier called "logwrite" which writes to a log file
4407 as soon as it is encountered.
4409 47. Added $local_user_uid and $local_user_gid at routing time.
4411 48. Exim crashed when trying to verify a sender address that was being
4414 49. Exim was recognizing only a space character after ".include". It now also
4415 recognizes a tab character.
4417 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4418 extracting the relevant information from the specification. The man page no
4419 longer contains scrambled data for the -d option, and I've added a section
4420 at the front about calling Exim under different names.
4422 51. Added "extra_headers" argument to the "mail" command in filter files.
4424 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4427 53. Installed eximstats 1.29.
4429 54. Added transport_filter_timeout as a generic transport option.
4431 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4432 Cc: header lines. This was required by RFC 822, but it not required by RFC
4435 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4436 incoming messages that did not have them. Now it does so only if the
4437 message originates locally, that is, if there is no associated remote host
4438 address. When Resent- header lines are present, this applies to the Resent-
4439 lines rather than the non-Resent- lines.
4441 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4442 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4444 58. Messages for configuration errors now include the name of the main
4445 configuration file - useful now that there may be more than one file in a
4446 list (.included file names were always shown).
4448 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4449 for those rare installations that do not start the daemon as root or run it
4450 setuid root. I've cut out the call to initgroups() if the daemon is not
4453 60. The Exim user and group can now be bound into the binary as text strings
4454 that are looked up at the start of Exim's processing.
4456 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4458 62. Added $mailstore_basename variable.
4460 63. Installed patch to sieve.c from Michael Haardt.
4462 64. When Exim failed to open the panic log after failing to open the main log,
4463 the original message it was trying to log was written to stderr and debug
4464 output, but if they were not available (the usual case in production), it
4465 was lost. Now it is written to syslog before the two lines that record the
4466 failures to open the logs.
4468 65. Users' Exim filters run in subprocesses under the user's uid. It is
4469 possible for a "deliver" command or an alias in a "personal" command to
4470 provoke an address rewrite. If logging of address rewriting is configured,
4471 this fails because the process is not running as root or exim. There may be
4472 a better way of dealing with this, but for the moment (because 4.30 needs
4473 to be released), I have disabled address rewrite logging when running a
4474 filter in a non-root, non-exim process.
4480 1. The buildconfig auxiliary program wasn't quoting the value set for
4481 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4482 not defined. This bug was masked in 4.22 by the effect that was fixed in
4485 2. Some messages that were rejected after a message id was allocated were
4486 shown as "incomplete" by exigrep. It no longer does this for messages that
4487 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4489 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4490 have allow_domain_literals set, the ID did not get logged in the <= line.
4491 Domain literals are now always recognized in Message-ID: header lines.
4493 4. The first argument for a ${extract expansion item is the key name or field
4494 number. Leading and trailing spaces in this item were not being ignored,
4495 causing some misleading effects.
4497 5. When deliver_drop_privilege was set, single queue runner processes started
4498 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4499 same command in the process it spins off) were not dropping privilege.
4501 6. When the daemon running as "exim" started a queue runner, it always
4502 re-executed Exim in the spun-off process. This is a waste of effort when
4503 deliver_drop_privilege is set. The new process now just calls the
4504 queue-runner function directly.
4510 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4513 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4514 ignored. Though the use of -oP was forcing the writing of a pid file, it
4515 was always written to the default place.
4517 3. If the message "no IP address found for host xxxx" is generated during
4518 incoming verification, it is now followed by identification of the incoming
4519 connection (so you can more easily find what provoked it).
4521 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4523 5. Added some features to "harden" Exim a bit more against certain attacks:
4525 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4526 be put in Local/Makefile. This is like the never_users runtime option,
4527 but it cannot be overridden. The default setting is "root".
4529 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4530 prefix string with which any file named in a -C command line option
4533 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4534 is retained for -C and -D only if the caller of Exim is root. Without
4535 it, the exim user may also use -C and -D and retain privilege.
4537 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4538 command line option is disabled.
4540 6. Macro names set by the -D option must start with an upper case letter, just
4541 like macro names defined in the configuration file.
4543 7. Added "dereference=" facility to LDAP.
4545 8. Two instances of the typo "uknown" in the source files are fixed.
4547 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4548 the Configure-Makefile script screwed up while processing it.
4550 10. Incorporated PCRE 4.4.
4552 11. The SMTP synchronization check was not operating right at the start of an
4553 SMTP session. For example, it could not catch a HELO sent before the client
4554 waited for the greeting. There is now a check for outstanding input at the
4555 point when the greeting is written. Because of the duplex, asynchronous
4556 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4557 way, but not yet received, when the check is performed.
4559 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4560 on TCP/IP sockets, because this apparently causes some broken clients to
4563 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4564 unchanged) from the Cygwin maintainer.
4566 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4567 was supported instead of testing for mbx. Effectively a typo.
4569 15. The spa authenticator server code was not checking that the input it
4570 received was valid base64.
4572 16. The debug output line for the "set" modifier in ACLs was not showing the
4573 name of the variable that was being set.
4575 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4577 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4578 lookup on its own. Something else was needed to trigger the lookup. For
4579 example, a match in host_lookup or the need for a host name in a host list.
4580 Now, if $sender_host_name is referenced and the host name has not yet been
4581 looked up, a lookup is performed. If the lookup fails, the variable remains
4582 empty, and $host_lookup_failed is set to "1".
4584 19. Added "eqi" as a case-independent comparison operator.
4586 20. The saslauthd authentication condition could segfault if neither service
4587 nor realm was specified.
4589 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4590 error message that was logged was misleading, and incoming SMTP
4591 connections were dropped. The message is now more accurate, and temporary
4592 errors are given to SMTP connections.
4594 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4595 (except RSET) with a 421 error, until QUIT is received. However, it was
4596 failing to send a response to QUIT.
4598 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4599 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4600 ACL is now run after the helo_try_verify_hosts code.
4602 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4603 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4604 case-independent, so other case variants are also recognized). Apparently
4605 some systems use these upper case variants.
4607 25. If more than two messages were waiting for the same host, and a transport
4608 filter was specified for the transport, Exim sent two messages over the
4609 same TCP/IP connection, and then failed with "socket operation on non-
4610 socket" when it tried to send the third.
4612 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4614 27. The extern definition of crypt16() in expand.c was not being excluded when
4615 the OS had its own crypt16() function.
4617 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4618 as a preferred synonym for return_size_limit, both as an option and as an
4621 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4623 30. Changed the default configuration ACL to relax the local part checking rule
4624 for addresses that are not in any local domains. For these addresses,
4625 slashes and pipe symbols are allowed within local parts, but the sequence
4626 /../ is explicitly forbidden.
4628 31. SPA server authentication was not clearing the challenge buffer before
4631 32. log_message in a "warn" ACL statement was writing to the reject log as
4632 well as to the main log, which contradicts the documentation and doesn't
4633 seem right (because no rejection is happening). So I have stopped it.
4635 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4636 However, I am unable to do any testing of this.
4638 34. Fixed an infelicity in the appendfile transport. When checking directories
4639 for a mailbox, to see if any needed to be created, it was accidentally
4640 using path names with one or more superfluous leading slashes; tracing
4641 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4643 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4644 contents are added to the log line that is written for every discarded
4645 recipient. (Previously a log_message setting was ignored.)
4647 36. The ${quote: operator now quotes the string if it is empty.
4649 37. The install script runs exim in order to find its version number. If for
4650 some reason other than non-existence or emptiness, which it checks, it
4651 could not run './exim', it was installing it with an empty version number,
4652 i.e. as "exim-". This error state is now caught, and the installation is
4655 38. An argument was missing from the function that creates an error message
4656 when Exim fails to connect to the socket for saslauthd authentication.
4657 This could cause Exim to crash, or give a corrupted message.
4659 39. Added isip, isip4, and isip6 to ${if conditions.
4661 40. The ACL variables $acl_xx are now saved with the message, and can be
4662 accessed later in routers, transports, and filters.
4664 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4665 strings in the file are not string-expanded.
4667 42. If a MAIL command specified a SIZE value that was too large to fit into an
4668 int variable, the check against message_size_limit failed. Such values are
4669 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4670 day this will have to be increased, but I don't think I want to be around
4671 when emails are that large.
4678 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4679 iconv() is not standard in FreeBSD.
4681 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4682 IPv6 enabled. The observed symptom was a segmentation fault on return from
4683 the function os_common_find_running_interfaces() in src/os.c.
4685 3. In the check_special_case() function in daemon.c I had used "errno" as an
4686 argument name, which causes warnings on some systems. This was basically a
4687 typo, since it was named "eno" in the comments!
4689 4. The code that waits for the clock to tick (at a resolution of some fraction
4690 of a second) so as to ensure message-id uniqueness was always waiting for
4691 at least one whole tick, when it could have waited for less. [This is
4692 almost certainly not relevant at current processor speeds, where it is
4693 unlikely to ever wait at all. But we try to future-proof.]
4695 5. The function that sleeps for a time interval that includes fractions of a
4696 second contained a race. It did not block SIGALRM between setting the
4697 timer, and suspending (a couple of lines later). If the interval was short
4698 and the sigsuspend() was delayed until after it had expired, the suspension
4699 never ended. On busy systems this could lead to processes getting stuck for
4702 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4703 process, before it forks any delivery processes. The open lookup caching
4704 mechanism meant that the open file or database connection was passed into
4705 the delivery process. The problem was that delivery processes always tidy
4706 up cached lookup data. This could cause a problem for the next delivery
4707 process started by the queue runner, because the external queue runner
4708 process does not know about the closure. So the next delivery process
4709 still has data in the lookup cache. In the case of a file lookup, there was
4710 no problem because closing a file descriptor in a subprocess doesn't affect
4711 the parent. However, if the lookup was caching a connection to a database,
4712 the connection was closed, and the second delivery process was likely to
4713 see errors such as "PGSQL: query failed: server closed the connection
4714 unexpectedly". The problem has been fixed by closing all cached lookups
4715 in a queue runner before running a delivery process.
4717 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4718 seem to have the "const" qualifier which it has on other OS. I've
4721 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4722 *of the same type* (client or server) with the same public name that an
4723 error should be diagnosed.
4725 9. When Exim looked up a host name for an IP address, but failed to find the
4726 original IP address when looking up the host name (a safety check), it
4727 output the message "<ip address> does not match any IP for NULL", which was
4728 confusing, to say the least. The bug was that the host name should have
4729 appeared instead of "NULL".
4731 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4732 user that is built into the binary, and the -C or -D options is used, root
4733 privilege is dropped before the configuration file is read. In addition,
4734 logging is switched to stderr instead of the normal log files. If the
4735 configuration then re-defines the Exim user, the unprivileged environment
4736 is probably not what is expected, so Exim logs a panic warning message (but
4739 However, if deliver_drop_privilege is set, the unprivileged state may well
4740 be exactly what is intended, so the warning has been cut out in that case,
4741 and Exim is allowed to try to write to its normal log files.
4747 1. smtp_return_error_details was not giving details for temporary sender
4748 or receiver verification errors.
4750 2. Diagnose a configuration error if two authenticators have the same public
4753 3. Exim used not to create the message log file for a message until the first
4754 delivery attempt. This could be confusing when incoming messages were held
4755 for policy or load reasons. The message log file is now created at the time
4756 the message is received, and an initial "Received" line is written to it.
4758 4. The automatically generated man page for command line options had a minor
4759 bug that caused no ill effects; however, a more serious problem was that
4760 the procedure for building the man page automatically didn't always
4761 operate. Consequently, release 4.20 contains an out-of-date version. This
4762 shouldn't happen again.
4764 5. When building Exim with embedded Perl support, the script that builds the
4765 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4766 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4768 6. The freeze_tell option was not being used for messages that were frozen on
4769 arrival, either by an ACL or by local_scan().
4771 7. Added the smtp_incomplete_transaction log selector.
4773 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4774 was accepting AUTH without a new EHLO.
4776 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4777 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4780 10. Logging of TCP/IP connections (when configured) now happens in the main
4781 daemon process instead of the child process, so that the TCP/IP connection
4782 count is more accurate (but it can never be perfect).
4784 11. The use of "drop" in a nested ACL was not being handled correctly in the
4785 outer ACL. Now, if condition failure induced by the nested "drop" causes
4786 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4787 or "require"), the connection is dropped.
4789 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4790 that yield "discard" can now be used with an "accept" or a "discard" verb,
4791 but an error is generated for any others (because I can't see a useful way
4792 to define what should happen).
4794 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4795 are now processed in the same way as lines in the Exim configuration file.
4796 In particular, continuation lines are supported.
4798 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4800 15. Added -ti meaning -t -i.
4802 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4803 domains, and warn by logging if others are found.
4805 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4806 returned from GIFCONF when Exim is trying to find the list of interfaces on
4807 a host. The code in os.c has been modified to copy each ifreq to an aligned
4808 structure in all cases.
4810 Also, in some cases, the returned ifreq's were being copied to a 'struct
4811 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4812 means the last couple of bytes of an IPv6 address could be chopped if the
4813 ifreq contained only a normal sockaddr (14 bytes storage).
4815 18. Named domain lists were not supported in the hosts_treat_as_local option.
4816 An entry such as +xxxx was not recognized, and was treated as a literal
4819 19. Ensure that header lines added by a DATA ACL are included in the reject log
4820 if the ACL subsequently rejects the message.
4822 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4823 MD5 (which is deprecated).
4825 21. When testing a filter file using -bf, Exim was writing a message when it
4826 took the sender from a "From " line in the message, but it was not doing so
4827 when it took $return_path from a Return-Path: header line. It now does.
4829 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4830 with a valid header line field name (a series of printing characters
4831 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4833 23. Changed "disc" in the source to "disk" to conform to the documentation and
4834 the book and for uniformity.
4836 24. Ignore Sendmail's -Ooption=value command line item.
4838 25. When execve() failed while trying to run a command in a pipe transport,
4839 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4840 could be confused with a return value of 69 from the command itself. This
4841 has been changed to 127, the value the shell returns if it is asked to run
4842 a non-existent command. The wording for the related log line suggests a
4843 non-existent command as the problem.
4845 26. If received_header_text expands to an empty string, do not add a Received:
4846 header line to the message. (Well, it adds a token one on the spool, but
4847 marks it "old" so that it doesn't get used or transmitted.)
4849 27. Installed eximstats 1.28 (addition of -nt option).
4851 28. There was no check for failure on the call to getsockname() in the daemon
4852 code. This can fail if there is a shortage of resources on the system, with
4853 ENOMEM, for example. A temporary error is now given on failure.
4855 29. Contrary to the C standard, it seems that in some environments, the
4856 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4857 program. Exim now does this explicitly; it affects the formatting of
4858 timestamps using strftime().
4860 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4861 complaints. I've now initialized all the variables, to avoid this.
4863 32. Header lines added by a system filter were not being "seen" during
4864 transport-time rewrites.
4866 33. The info_callback() function passed to OpenSSL is set up with type void
4867 (*)(SSL *, int, int), as described somewhere. However, when calling the
4868 function (actually a macro) that sets it up, the type void(*)() is
4869 expected. I've put in a cast to prevent warnings from picky compilers.
4871 34. If a DNS black list lookup found a CNAME record, but there were no A
4872 records associated with the domain it pointed at, Exim crashed.
4874 35. If a DNS black list lookup returned more than one A record, Exim ignored
4875 all but the first. It now scans all returned addresses if a particular IP
4876 value is being sought. In this situation, the contents of the
4877 $dnslist_value variable are a list of all the addresses, separated by a
4880 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4881 to accept a host name and all its aliases if the forward lookup for any of
4882 them yielded the IP address of the incoming connection. Now it accepts only
4883 those names whose forward lookup yields the correct IP address. Any other
4884 names are discarded. This closes a loophole whereby a rogue DNS
4885 administrator could create reverse DNS records to break through a
4886 wildcarded host restriction in an ACL.
4888 37. If a user filter or a system filter that ran in a subprocess used any of
4889 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4890 the wrong values were passed to the pipe command ($thisaddress had the
4891 value of $0, $0 had the value of $1, etc). This bug was introduced by
4892 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4894 38. Improved the line breaking for long SMTP error messages from ACLs.
4895 Previously, if there was no break point between 40 and 75 characters, Exim
4896 left the rest of the message alone. Two changes have been made: (a) I've
4897 reduced the minimum length to 35 characters; (b) if it can't find a break
4898 point between 35 and 75 characters, it looks ahead and uses the first one
4899 that it finds. This may give the occasional overlong line, but at least the
4900 remaining text gets split now.
4902 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4903 file descriptors might be low, and that setting 1000 would always raise it.
4904 It turns out that in some environments, the limit is already over 1000 and
4905 that lowering it causes trouble. So now Exim takes care not to decrease it.
4907 40. When delivering a message, the value of $return_path is set to $sender_
4908 address at the start of routing (routers may change the value). By an
4909 oversight, this default was not being set up when an address was tested by
4910 -bt or -bv, which affected the outcome if any router or filter referred to
4913 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4914 log only when "message" or "log_message" are set. However, if one of the
4915 conditions was an address verification, or a call to a nested ACL, the
4916 messages generated by the underlying test were being passed through. This
4917 no longer happens. The underlying message is available in $acl_verify_
4918 message for both "message" and "log_message" expansions, so it can be
4919 passed through if needed.
4921 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4922 new expansion $bh_ to give the encoded byte string without charset
4923 translation. Translation happens only if iconv() is available; HAVE_ICONV
4924 indicates this at build time. HEADERS_CHARSET gives the charset to
4925 translate to; headers_charset can change it in the configuration, and
4926 "headers charset" can change it in an individual filter file.
4928 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4929 that creates RFC 2047 encoded "words" labels them as that charset instead
4930 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4931 expansion operator; (ii) when Exim creates a From: line for a local
4932 message; (iii) when a header line is rewritten to include a "phrase" part.
4934 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4935 buggy, causing it to skip the first lines of messages whose message ID
4936 ended in 'D'. This would not have bitten before Exim release 4.14, because
4937 message IDs were unlikely to end in 'D' before then. The effect was to have
4938 incorrect size information for certain domains.
4940 45. #include "config.h" was missing at the start of the crypt16.c module. This
4941 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4944 46. If there was a timeout during a "random" callout check, Exim treated it as
4945 a failure of the random address, and carried on sending RSET and the real
4946 address. If the delay was just some slowness somewhere, the response to the
4947 original RCPT would be taken as a response to RSET and so on, causing
4948 mayhem of various kinds.
4950 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4951 when I implemented it. It didn't allow for the fact that some option values
4952 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4953 the right test for positive values.
4955 48. Domain names in DNS records are case-independent. Exim always looks them up
4956 in lower case. Some resolvers return domain names in exactly the case they
4957 appear in the zone file, that is, they may contain uppercase letters. Not
4958 all resolvers do this - some return always lower case. Exim was treating a
4959 change of case by a resolver as a change of domain, similar to a widening
4960 of a domain abbreviation. This triggered its re-routing code and so it was
4961 trying to route what was effectively the same domain again. This normally
4962 caused routing to fail (because the router wouldn't handle the domain
4963 twice). Now Exim checks for this case specially, and just changes the
4964 casing of the domain that it ultimately uses when it transmits the message
4967 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4970 50. If a filter generated a file delivery with a non-absolute name (possible if
4971 no home directory exists for the router), the forbid_file option was not
4974 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4975 the existing equality matching.
4977 52. Exim was using ints instead of ino_t variables in some places where it was
4978 dealing with inode numbers.
4980 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4981 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4982 called TMPDIR, and if it finds it is different, it changes its value.
4984 54. The smtp_printf() function is now made available to local_scan() so
4985 additional output lines can be written before returning. There is also an
4986 smtp_fflush() function to enable the detection of a dropped connection.
4987 The variables smtp_input and smtp_batched_input are exported to
4990 55. Changed the default runtime configuration: the message "Unknown user"
4991 has been removed from the ACL, and instead placed on the localuser router,
4992 using the cannot_route_message feature. This means that any verification
4993 failures that generate their own messages won't get overridden. Similarly,
4994 the "Unrouteable address" message that was in the ACL for unverifiable
4995 relay addresses has also been removed.
4997 56. Added hosts_avoid_esmtp to the smtp transport.
4999 57. The exicyclog script was not checking for the esoteric option
5000 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5001 will work only if exicyclog is run under the appropriate euid.
5003 58. Following a discussion on the list, the rules by which Exim recognises line
5004 endings on incoming messages have been changed. The -dropcr and drop_cr
5005 options are now no-ops, retained only for backwards compatibility. The
5006 following line terminators are recognized: LF CRLF CR. However, special
5007 processing applies to CR:
5009 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5010 nor a local message in the state where . is a terminator.
5012 (ii) If a bare CR is encountered in a header line, an extra space is added
5013 after the line terminator so as not to end the header. The reasoning
5014 behind this is that bare CRs in header lines are most likely either
5015 to be mistakes, or people trying to play silly games.
5017 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5018 was being incorrectly given as 18 bytes larger than it should have been.
5019 This is a VOB (very old bug).
5021 60. This may never have affected anything current, but just in case it has:
5022 When the local host is found other than at the start of a list of hosts,
5023 the local host, those with the same MX, and any that follow, are discarded.
5024 When the list in question was part of a longer list of hosts, the following
5025 hosts (not currently being processed) were also being discarded. This no
5026 longer happens. I'm not sure if this situation could ever has previously
5029 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5032 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5033 header. This is something that is recommended in a new Internet Draft, and
5034 is something that is documented as being done by Sendmail. There are two
5035 possible values. For messages generated by the autoreply transport, Exim
5038 Auto-Submitted: auto-replied
5040 whereas for all other generated messages (e.g. bounces) it adds
5042 Auto-Submitted: auto-generated
5044 63. The "personal" condition in filters now includes a test for the
5045 Auto-Submitted: header. If it contains the string "auto-" the message it
5046 not considered personal.
5048 64. Added rcpt_include_affixes as a generic transport option.
5050 65. Added queue_only_override (default true).
5052 66. Added the syslog_duplication option.
5054 67. If what should have been the first header line of a message consisted of
5055 a space followed by a colon, Exim was mis-interpreting it as a header line.
5056 It isn't of course - it is syntactically invalid and should therefore be
5057 treated as the start of the message body. The misbehaviour could have
5058 caused a number of strange effects, including loss of data in subsequent
5059 header lines, and spool format errors.
5061 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5062 client host had authenticated. This control can now be exercised by an ACL
5063 for more flexibility.
5065 69. By default, callouts do not happen when testing with -bh. There is now a
5066 variant, -bhc, which does actually run the callout code, including
5067 consulting and updating the callout cache.
5069 70. Added support for saslauthd authentication, courtesy of Alexander
5072 71. If statvfs() failed on the spool or log directories while checking their
5073 size for availability, Exim confusingly gave the error "space shortage".
5074 Furthermore, in debugging mode it crashed with a floating point exception.
5075 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5076 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5077 serious problem, Exim now writes to the main and panic logs when this
5078 happens, with details of the failure. It then refuses to accept the
5079 incoming message, giving the message "spool directory problem" or "log
5080 directory problem" with a 421 code for SMTP messages.
5082 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5083 0, 1, and 2 exist, because some OS complain for execs without them (see
5084 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5085 descriptors. However, the code omitted to check that the open succeeded,
5086 causing mysterious errors if for some reason the permissions on /dev/null
5087 got screwed. Now Exim writes a message to the main and panic logs, and
5088 bombs out if it can't open /dev/null.
5090 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5091 interact so that it is all more flexible. It is supposed to remain
5092 backwards compatible. Also added extra_local_interfaces.
5094 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5095 to bomb out with an assertion failure - to the client this appears as a
5096 connection drop. This problem occurs in the part of the code that was taken
5097 from the Samba project. Fortunately, the assertion is in a very simple
5098 function, so I have fixed this by reproducing the function inline in the
5099 one place where it is called, and arranging for authentication to fail
5100 instead of killing the process with assert().
5102 75. The SPA client code was not working when the server requested OEM rather
5103 than Unicode encoding.
5105 76. Added code to make require_files with a specific uid setting more usable in
5106 the case where statting the file as root fails - usually a non-root-mounted
5107 NFS file system. When this happens and the failure is EACCES, Exim now
5108 forks a subprocess and does the per-uid checking as the relevant uid.
5110 77. Added process_log_path.
5112 78. If log_file_path was not explicitly set, a setting of check_log_space or
5113 check_log_inodes was ignored.
5115 79. If a space check for the spool or log partitions fails, the incident is now
5116 logged. Of course, in the latter case the data may get lost...
5118 80. Added the %p formatting code to string_format() so that it can be used to
5119 print addresses in debug_print(). Adjusted all the address printing in the
5120 debugging in store.c to use %p rather than %d.
5122 81. There was a concern that a line of code in smtp_in.c could overflow a
5123 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5124 initially expressed, the concern was not well-founded, because trailing
5125 spaces are removed early. However, if the trailing spaces were followed by
5126 a NULL, they did not get removed, so the overflow was possible. Two fixes
5129 (a) I re-wrote the offending code in a cleaner fashion.
5130 (b) If an incoming SMTP command contains a NULL character, it is rejected
5133 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5134 runs initgroups(), so that if the Exim user is in any additional groups,
5135 they will be used during message reception.
5141 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob