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".
35 PP/09 Implemented reverse_ip expansion operator.
37 PP/10 Bugzilla 937: provide a "debug" ACL control.
39 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
41 PP/12 Bugzilla 973: Implement --version.
43 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
45 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
47 PP/15 Bugzilla 816: support multiple condition rules on Routers.
49 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
50 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
51 ignore trailing whitespace.
53 JJ/02 prevent non-panic DKIM error from being sent to paniclog
55 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
61 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
62 $data_path, and $header_path variables; fixed documentation bugs and
65 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
66 exipick to access non-standard spools, including the "frozen" queue
69 NM/01 Bugzilla 965: Support mysql stored procedures.
70 Patch from Alain Williams
72 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
74 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
75 Patch from Andreas Metzler
77 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
78 Patch from Kirill Miazine
80 NM/05 Bugzilla 671: Added umask to procmail example.
82 JJ/03 installed exipick 20100323.0, fixing doc bug
84 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
85 directory. Notification and patch from Dan Rosenberg.
87 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
89 TK/02 Improve log output when DKIM signing operation fails.
91 MH/01 Treat the transport option dkim_domain as a colon separated
92 list, not as a single string, and sign the message with each element,
93 omitting multiple occurences of the same signer.
95 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
96 Bugzilla 985, 986. Patch by Simon Arlott
98 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
101 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
102 MBX locking. Notification from Dan Rosenberg.
108 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
110 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
112 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
114 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
116 NM/04 Bugzilla 915: Flag broken perl installation during build.
122 TK/01 Added patch by Johannes Berg that expands the main option
123 "spamd_address" if it starts with a dollar sign.
125 TK/02 Write list of recipients to X-Envelope-Sender header when building
126 the mbox-format spool file for content scanning (suggested by Jakob
129 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
130 (http://www.dcc-servers.net/) support via dccifd. Activated by
131 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
133 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
134 by Mark Daniel Reidel <mr@df.eu>.
136 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
137 When building exim an external PCRE library is now needed -
138 PCRE is a system library on the majority of modern systems.
139 See entry on PCRE_LIBS in EDITME file.
141 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
142 conversation. Added nologin parameter to request.
143 Patch contributed by Kirill Miazine.
145 TF/01 Do not log submission mode rewrites if they do not change the address.
147 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
149 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
150 log files in place. Contributed by Roberto Lima.
152 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
154 TF/03 Bugzilla 615: When checking the local_parts router precondition
155 after a local_part_suffix or local_part_prefix option, Exim now
156 does not use the address's named list lookup cache, since this
157 contains cached lookups for the whole local part.
159 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
160 Robert Millan. Documentation is in experimental-spec.txt.
162 TF/04 Bugzilla 668: Fix parallel build (make -j).
164 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
166 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
167 Patch provided by Jan Srzednicki.
169 TF/05 Leading white space used to be stripped from $spam_report which
170 wrecked the formatting. Now it is preserved.
172 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
173 that they are available at delivery time.
175 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
177 TF/08 TLS error reporting now respects the incoming_interface and
178 incoming_port log selectors.
180 TF/09 Produce a more useful error message if an SMTP transport's hosts
181 setting expands to an empty string.
183 NM/06 Bugzilla 744: EXPN did not work under TLS.
184 Patch provided by Phil Pennock.
186 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
187 Patch provided by Richard Godbee.
189 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
190 acl_smtp_notquit, added index entry.
192 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
193 Patch provided by Eugene Bujak.
195 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
196 accept(). Patch provided by Maxim Dounin.
198 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
199 Patch provided by Phil Pennock.
201 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
203 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
204 Patch provided by Brad "anomie" Jorsch.
206 NM/14 Bugzilla 622: Added timeout setting to transport filter.
207 Patch provided by Dean Brooks.
209 TK/05 Add native DKIM support (does not depend on external libraries).
211 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
212 Patch provided by Graeme Fowler.
214 NM/16 Bugzilla 851: Documentation example syntax fix.
216 NM/17 Changed NOTICE file to remove references to embedded PCRE.
218 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
221 NM/19 Bugzilla 745: TLS version reporting.
222 Patch provided by Phil Pennock.
224 NM/20 Bugzilla 167: bool: condition support.
225 Patch provided by Phil Pennock.
227 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
228 clients. Patch provided by Phil Pennock.
230 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
231 Patch provided by Brad "anomie" Jorsch.
233 NM/23 Bugzilla 687: Fix misparses in eximstats.
234 Patch provided by Heiko Schlittermann.
236 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
237 Patch provided by Heiko Schlittermann.
239 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
240 plus update to original patch.
242 NM/26 Bugzilla 799: Documentation correction for ratelimit.
244 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
245 Patch provided by David Brownlee.
247 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
249 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
251 NM/30 Bugzilla 888: TLS documentation bugfixes.
253 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
255 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
256 Unlike the original bugzilla I have changed all shell scripts in src tree.
258 NM/33 Bugzilla 898: Transport filter timeout fix.
259 Patch by Todd Rinaldo.
261 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
262 Patch by Serge Demonchaux.
264 NM/35 Bugzilla 39: Base64 decode bug fixes.
265 Patch by Jakob Hirsch.
267 NM/36 Bugzilla 909: Correct connect() call in dcc code.
269 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
271 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
273 NM/39 Bugzilla 911: Fixed MakeLinks build script.
279 TK/01 Add preliminary DKIM support. Currently requires a forked version of
280 ALT-N's libdkim that I have put here:
281 http://duncanthrax.net/exim-experimental/
283 Note to Michael Haardt: I had to rename some vars in sieve.c. They
284 were called 'true' and it seems that C99 defines that as a reserved
285 keyword to be used with 'bool' variable types. That means you could
286 not include C99-style headers which use bools without triggering
287 build errors in sieve.c.
289 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
290 as mailq or other aliases. Changed the --help handling significantly
291 to do whats expected. exim_usage() emits usage/help information.
293 SC/01 Added the -bylocaldomain option to eximstats.
295 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
297 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
299 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
305 PH/01 Another patch from the Sieve maintainer.
307 PH/02 When an IPv6 address is converted to a string for single-key lookup
308 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
309 dots are used instead of colons so that keys in lsearch files need not
310 contain colons. This was done some time before quoting was made available
311 in lsearch files. However, iplsearch files do require colons in IPv6 keys
312 (notated using the quote facility) so as to distinguish them from IPv4
313 keys. This meant that lookups for IP addresses in host lists did not work
314 for iplsearch lookups.
316 This has been fixed by arranging for IPv6 addresses to be expressed with
317 colons if the lookup type is iplsearch. This is not incompatible, because
318 previously such lookups could never work.
320 The situation is now rather anomolous, since one *can* have colons in
321 ordinary lsearch keys. However, making the change in all cases is
322 incompatible and would probably break a number of configurations.
324 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
327 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
328 conversion specification without a maximum field width, thereby enabling
329 a rogue spamd server to cause a buffer overflow. While nobody in their
330 right mind would setup Exim to query an untrusted spamd server, an
331 attacker that gains access to a server running spamd could potentially
332 exploit this vulnerability to run arbitrary code as the Exim user.
334 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
335 $primary_hostname instead of what libspf2 thinks the hosts name is.
337 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
338 a directory entry by the name of the lookup key. Previously, if a
339 symlink pointed to a non-existing file or a file in a directory that
340 Exim lacked permissions to read, a lookup for a key matching that
341 symlink would fail. Now it is enough that a matching directory entry
342 exists, symlink or not. (Bugzilla 503.)
344 PH/03 The body_linecount and body_zerocount variables are now exported in the
347 PH/04 Added the $dnslist_matched variable.
349 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
350 This means they are set thereafter only if the connection becomes
353 PH/06 Added the client_condition to authenticators so that some can be skipped
354 by clients under certain conditions.
356 PH/07 The error message for a badly-placed control=no_multiline_responses left
357 "_responses" off the end of the name.
359 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
361 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
362 (without spaces) instead of just copying the configuration text.
364 PH/10 Added the /noupdate option to the ratelimit ACL condition.
366 PH/11 Added $max_received_linelength.
368 PH/12 Added +ignore_defer and +include_defer to host lists.
370 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
371 way in which PCRE > 7.0 is built.
373 PH/14 Implemented queue_only_load_latch.
375 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
376 MAIL command. The effect was to mangle the value on 64-bit systems.
378 PH/16 Another patch from the Sieve maintainer.
380 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
382 PH/18 If a system quota error occurred while trying to create the file for
383 a maildir delivery, the message "Mailbox is full" was not appended to the
384 bounce if the delivery eventually timed out. Change 4.67/27 below applied
385 only to a quota excession during the actual writing of the file.
387 PH/19 It seems that peer DN values may contain newlines (and other non-printing
388 characters?) which causes problems in log lines. The DN values are now
389 passed through string_printing() before being added to log lines.
391 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
392 and InterBase are left for another time.)
394 PH/21 Added message_body_newlines option.
396 PH/22 Guard against possible overflow in moan_check_errorcopy().
398 PH/23 POSIX allows open() to be a macro; guard against that.
400 PH/24 If the recipient of an error message contained an @ in the local part
401 (suitably quoted, of course), incorrect values were put in $domain and
402 $local_part during the evaluation of errors_copy.
408 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
409 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
412 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
413 issue a MAIL command.
415 PH/02 In an ACL statement such as
417 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
419 if a client was not listed at all, or was listed with a value other than
420 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
421 the condition was not true (as it should be), so access was not denied.
422 The bug was that the ! inversion was incorrectly passed on to the second
423 item. This has been fixed.
425 PH/03 Added additional dnslists conditions == and =& which are different from
426 = and & when the dns lookup returns more than one IP address.
428 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
429 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
431 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
432 FSYNC, which compiles an option called disable_fsync that allows for
433 bypassing fsync(). The documentation is heavily laced with warnings.
435 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
437 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
438 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
439 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
440 including adding "make clean"; (3) Added -fPIC when compiling the test
441 dynamically loaded module, to get rid of a warning.
443 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
444 message fails, move_frozen_messages = true and ignore_bounce_errors_after
445 = 0s. The bug is otherwise harmless.
447 PH/07 There was a bug in the dovecot authenticator such that the value of
448 $auth1 could be overwritten, and so not correctly preserved, after a
449 successful authentication. This usually meant that the value preserved by
450 the server_setid option was incorrect.
452 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
454 PH/09 Installed PCRE release 7.0.
456 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
457 run for batched SMTP input. It is now run at the start of every message
458 in the batch. While fixing this I discovered that the process information
459 (output by running exiwhat) was not always getting set for -bs and -bS
460 input. This is fixed, and it now also says "batched" for BSMTP.
462 PH/11 Added control=no_pipelining.
464 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
465 patch, slightly modified), and move the expansion of helo_data till after
466 the connection is made in the smtp transport (so it can use these
469 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
471 PH/14 Added log_selector = +pid.
473 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
475 PH/16 Add ${if forany and ${if forall.
477 PH/17 Added dsn_from option to vary the From: line in DSNs.
479 PH/18 Flush SMTP output before performing a callout, unless control =
480 no_callout_flush is set.
482 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
483 was true (the default) a successful delivery failed to delete the retry
484 item, thus causing premature timeout of the address. The bug is now
487 PH/20 Added hosts_avoid_pipelining to the smtp transport.
489 PH/21 Long custom messages for fakedefer and fakereject are now split up
490 into multiline reponses in the same way that messages for "deny" and
491 other ACL rejections are.
493 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
494 with slight modification.
496 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
497 draft, changing the syntax and factoring some duplicate code".
499 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
500 for deliveries of the second and subsequent messages over the same SMTP
503 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
504 ${reduce, with only minor "tidies".
506 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
508 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
509 expansion side effects.
511 PH/27 When a message times out after an over-quota error from an Exim-imposed
512 quota, the bounce message says "mailbox is full". This message was not
513 being given when it was a system quota that was exceeded. It now should
516 MH/03 Made $recipients available in local_scan(). local_scan() already has
517 better access to the recipient list through recipients_list[], but
518 $recipients can be useful in postmaster-provided expansion strings.
520 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
521 in the case of a MAIL command with additional options following the
522 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
523 were accidentally chopped off.
525 PH/29 SMTP synchronization checks are implemented when a command is read -
526 there is a check that no more input is waiting when there shouldn't be
527 any. However, for some commands, a delay in an ACL can mean that it is
528 some time before the response is written. In this time, more input might
529 arrive, invalidly. So now there are extra checks after an ACL has run for
530 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
531 pipelining has not been advertised.
533 PH/30 MH's patch to allow iscntrl() characters to be list separators.
535 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
536 returned in the SMTP response when smtp_return_error_details was false.
539 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
540 instead of the C I/O that was originally supplied, because problems were
543 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
544 Exim which did not show up earlier: it was assuming that a call to
545 SSL_CTX_set_info_callback() might give an error value. In fact, there is
546 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
547 was a macro that became an assignment, so it seemed to work. This has
548 changed to a proper function call with a void return, hence the compile
549 error. Exim's code has been fixed.
551 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
554 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
556 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
558 PH/37 If a message is not accepted after it has had an id assigned (e.g.
559 because it turns out to be too big or there is a timeout) there is no
560 "Completed" line in the log. When some messages of this type were
561 selected by exigrep, they were listed as "not completed". Others were
562 picked up by some special patterns. I have improved the selection
563 criteria to be more general.
565 PH/38 The host_find_failed option in the manualroute router can now be set
566 to "ignore", to completely ignore a host whose IP address cannot be
567 found. If all hosts are ignored, the behaviour is controlled by the new
568 host_all_ignored option.
570 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
571 homing or because of multiple MX records with /mx) generated more than
572 one IP address, and the following item turned out to be the local host,
573 all the secondary addresses of the first item were incorrectly removed
574 from the list, along with the local host and any following hosts (which
575 is what is supposed to happen).
577 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
578 whoever called Exim into the -H file. In the case of the daemon it was
579 behaving confusingly. When first started, it used values for whoever
580 started the daemon, but after a SIGHUP it used the Exim user (because it
581 calls itself on a restart). I have changed the code so that it now always
584 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
585 message are rejected with the same error (e.g. no authentication or bad
586 sender address), and a DATA command is nevertheless sent (as can happen
587 with PIPELINING or a stupid MUA), the error message that was given to the
588 RCPT commands is included in the rejection of the DATA command. This is
589 intended to be helpful for MUAs that show only the final error to their
592 PH/42 Another patch from the Sieve maintainer.
594 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
595 Eximstats - Fixed some broken HTML links and added missing column headers
597 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
598 columns for Rejects, Temp Rejects, Ham, and Spam rows.
600 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
602 PH/43 Yet another patch from the Sieve maintainer.
604 PH/44 I found a way to check for a TCP/IP connection going away before sending
605 the response to the final '.' that terminates a message, but only in the
606 case where the client has not sent further data following the '.'
607 (unfortunately, this is allowed). However, in many cases there won't be
608 any further data because there won't be any more messages to send. A call
609 to select() can be used: if it shows that the input is "ready", there is
610 either input waiting, or the socket has been closed. An attempt to read
611 the next input character can distinguish the two cases. Previously, Exim
612 would have sent an OK response which the client would never have see.
613 This could lead to message repetition. This fix should cure that, at
614 least in a lot of common cases.
616 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
617 advertised in response to EHLO.
623 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
624 fixed by 4.65/MH/01 (is this a record?) are fixed:
626 (i) An empty string was always treated as zero by the numeric comparison
627 operators. This behaviour has been restored.
629 (ii) It is documented that the numeric comparison operators always treat
630 their arguments as decimal numbers. This was broken in that numbers
631 starting with 0 were being interpreted as octal.
633 While fixing these problems I realized that there was another issue that
634 hadn't been noticed. Values of message_size_limit (both the global option
635 and the transport option) were treated as octal if they started with 0.
636 The documentation was vague. These values are now always treated as
637 decimal, and I will make that clear in the documentation.
643 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
644 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
647 MH/01 Don't check that the operands of numeric comparison operators are
648 integers when their expansion is in "skipping" mode (fixes bug
649 introduced by 4.64-PH/07).
651 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
652 child addresses, Exim now panics and dies. Previously, because the count
653 is held in a short int, deliveries were likely to be lost. As such a
654 large number of recipients for a single message is ridiculous
655 (performance will be very, very poor), I have chosen to impose a limit
656 rather than extend the field.
662 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
663 leftover -K file (the existence of which was triggered by #402).
664 While we were at it, introduced process PID as part of the -K
665 filename. This should rule out race conditions when creating
668 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
669 processing considerably. Previous code took too long for large mails,
670 triggering a timeout which in turn triggers #401.
672 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
673 in the DK code in transports.c. sendfile() is not really portable,
674 hence the _LINUX specificness.
676 TF/01 In the add_headers option to the mail command in an Exim filter,
677 there was a bug that Exim would claim a syntax error in any
678 header after the first one which had an odd number of characters
681 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
682 callout verification, Exim cached a "reject" for the entire domain. This
683 is correct for most verifications, but it is not correct for a recipient
684 verification with use_sender or use_postmaster set, because in that case
685 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
686 case of MAIL FROM:<> rejection from other early rejections (e.g.
687 rejection of HELO). When verifying a recipient using a non-null MAIL
688 address, the cache is ignored if it shows MAIL FROM:<> rejection.
689 Whatever the result of the callout, the value of the domain cache is
690 left unchanged (for any other kind of callout, getting as far as trying
691 RCPT means that the domain itself is ok).
693 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
696 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
697 manifest itself as EPIPE rather than ECONNECT. When tidying away a
698 session, the daemon ignores ECONNECT errors and logs others; it now
699 ignores EPIPE as well.
701 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
702 (quoted-printable decoding).
704 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
705 later the small subsequent patch to fix an introduced bug.
707 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
709 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
711 PH/08 An error is now given if message_size_limit is specified negative.
713 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
714 to be given (somewhat) arbitrary names.
716 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
719 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
720 miscellaneous code fixes
722 PH/10 Added the log_reject_target ACL modifier to specify where to log
725 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
726 hostname. This is wrong, because it relates to the incoming message (and
727 probably the interface on which it is arriving) and not to the outgoing
728 callout (which could be using a different interface). This has been
729 changed to use the value of the helo_data option from the smtp transport
730 instead - this is what is used when a message is actually being sent. If
731 there is no remote transport (possible with a router that sets up host
732 addresses), $smtp_active_hostname is used.
734 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
735 tweaks were necessary in order to get it to work (see also 21 below):
736 (a) The code assumed that strncpy() returns a negative number on buffer
737 overflow, which isn't the case. Replaced with Exim's string_format()
739 (b) There were several signed/unsigned issues. I just did the minimum
740 hacking in of casts. There is scope for a larger refactoring.
741 (c) The code used strcasecmp() which is not a standard C function.
742 Replaced with Exim's strcmpic() function.
743 (d) The code set only $1; it now sets $auth1 as well.
744 (e) A simple test gave the error "authentication client didn't specify
745 service in request". It would seem that Dovecot has changed its
746 interface. Fortunately there's a specification; I followed it and
747 changed what the client sends and it appears to be working now.
749 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
752 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
753 address A is aliased to B and C, where B exists and C does not. Without
754 -v the output is "A verified" because verification stops after a
755 successful redirection if more than one address is generated. However,
756 with -v the child addresses are also verified. Exim was outputting "A
757 failed to verify" and then showing the successful verification for C,
758 with its parentage. It now outputs "B failed to verify", showing B's
759 parentage before showing the successful verification of C.
761 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
762 look up a TXT record in a specific list after matching in a combined
765 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
766 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
767 they consult the DNS. I had assumed they would set it the way they
768 wanted; and indeed my experiments on Linux seem to show that in some
769 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
770 To be on the safe side, however, I have now made the interface to
771 host_find_byname() similar to host_find_bydns(), with an argument
772 containing the DNS resolver options. The host_find_byname() function now
773 sets these options at its start, just as host_find_bydns() does. The smtp
774 transport options dns_qualify_single and dns_search_parents are passed to
775 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
776 of host_find_byname() use the default settings of RES_DEFNAMES
777 (qualify_single) but not RES_DNSRCH (search_parents).
779 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
780 spool_read_header() do less string testing, by means of a preliminary
781 switch on the second character of optional "-foo" lines. (This is
782 overdue, caused by the large number of possibilities that now exist.
783 Originally there were few.) While I was there, I also converted the
784 str(n)cmp tests so they don't re-test the leading "-" and the first
785 character, in the hope this might squeeze out yet more improvement.
787 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
788 flag allowing group syntax was set by the header_syntax check but not
789 turned off, possible causing trouble later; (2) The flag was not being
790 set at all for the header_verify test, causing "group"-style headers to
791 be rejected. I have now set it in this case, and also caused header_
792 verify to ignore an empty address taken from a group. While doing this, I
793 came across some other cases where the code for allowing group syntax
794 while scanning a header line wasn't quite right (mostly, not resetting
795 the flag correctly in the right place). These bugs could have caused
796 trouble for malformed header lines. I hope it is now all correct.
798 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
799 with the "reply" argument non-NULL. The code, however (which originally
800 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
801 but it didn't always do it. This confused somebody who was copying the
802 code for some other use. I have removed all the tests.
804 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
805 feature that was used to support insecure browsers during the U.S. crypto
806 embargo. It requires special client support, and Exim is probably the
807 only MTA that supported it -- and would never use it because real RSA is
808 always available. This code has been removed, because it had the bad
809 effect of slowing Exim down by computing (never used) parameters for the
810 RSA_EXPORT functionality.
812 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
813 authenticator to fail if there's a tab character in the incoming data
814 (there should never be unless someone is messing about, as it's supposed
815 to be base64-encoded). Also added, on Timo's advice, the "secured" option
816 if the connection is using TLS or if the remote IP is the same as the
817 local IP, and the "valid-client-cert option" if a client certificate has
820 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
821 authenticators. This can be used for authorization after authentication
822 succeeds. (In the case of plaintext, it servers for both authentication
825 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
826 if any retry times were supplied.
828 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
829 connection, where there is no client IP address to check. In this
830 situation, the verify now always succeeds.
832 PH/25 Applied John Jetmore's -Mset patch.
834 PH/26 Added -bem to be like -Mset, but loading a message from a file.
836 PH/27 In a string expansion for a processed (not raw) header when multiple
837 headers of the same name were present, leading whitespace was being
838 removed from all of them, but trailing whitespace was being removed only
839 from the last one. Now trailing whitespace is removed from each header
840 before concatenation. Completely empty headers in a concatenation (as
843 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
844 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
846 PH/29 [Removed. This was a change that I later backed out, and forgot to
847 correct the ChangeLog entry (that I had efficiently created) before
848 committing the later change.]
850 PH/30 Exim was sometimes attempting to deliver messages that had suffered
851 address errors (4xx response to RCPT) over the same connection as other
852 messages routed to the same hosts. Such deliveries are always "forced",
853 so retry times are not inspected. This resulted in far too many retries
854 for the affected addresses. The effect occurred only when there were more
855 hosts than the hosts_max_try setting in the smtp transport when it had
856 the 4xx errors. Those hosts that it had tried were not added to the list
857 of hosts for which the message was waiting, so if all were tried, there
858 was no problem. Two fixes have been applied:
860 (i) If there are any address or message errors in an SMTP delivery, none
861 of the hosts (tried or untried) are now added to the list of hosts
862 for which the message is waiting, so the message should not be a
863 candidate for sending over the same connection that was used for a
864 successful delivery of some other message. This seems entirely
865 reasonable: after all the message is NOT "waiting for some host".
866 This is so "obvious" that I'm not sure why it wasn't done
867 previously. Hope I haven't missed anything, but it can't do any
868 harm, as the worst effect is to miss an optimization.
870 (ii) If, despite (i), such a delivery is accidentally attempted, the
871 routing retry time is respected, so at least it doesn't keep
872 hammering the server.
874 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
875 in ${readsocket because some servers need this prod.
877 PH/32 Added some extra debug output when updating a wait-xxx database.
879 PH/33 The hint "could be header name not terminated by colon", which has been
880 given for certain expansion errors for a long time, was not being given
881 for the ${if def:h_colon_omitted{... case.
883 PH/34 The spec says: "With one important exception, whenever a domain list is
884 being scanned, $domain contains the subject domain." There was at least
885 one case where this was not true.
887 PH/35 The error "getsockname() failed: connection reset by peer" was being
888 written to the panic log as well as the main log, but it isn't really
889 panic-worthy as it just means the connection died rather early on. I have
890 removed the panic log writing for the ECONNRESET error when getsockname()
893 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
894 runs only) independently of the message's sender address. This meant
895 that, if the 4xx error was in fact related to the sender, a different
896 message to the same recipient with a different sender could confuse
897 things. In particualar, this can happen when sending to a greylisting
898 server, but other circumstances could also provoke similar problems.
899 I have changed the default so that the retry time for these errors is now
900 based a combination of the sender and recipient addresses. This change
901 can be overridden by setting address_retry_include_sender=false in the
904 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
905 remote server are returned as part of bounce messages. This was not
906 happening for LMTP over a pipe (the lmtp transport), but now it is the
907 same for both kinds of LMTP.
909 PH/38 Despite being documented as not happening, Exim was rewriting addresses
910 in header lines that were in fact CNAMEs. This is no longer the case.
912 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
913 and queue runs started by the daemon processed all messages. This has
914 been fixed so that -R and -S can now usefully be given with -q<time>.
916 PH/40 Import PCRE release 6.7 (fixes some bugs).
918 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
920 PH/42 Give an error if -q is specified more than once.
922 PH/43 Renamed the variables $interface_address and $interface_port as
923 $received_ip_address and $received_port, to make it clear that these
924 values apply to message reception, and not to the outgoing interface when
925 a message is delivered. (The old names remain recognized, of course.)
927 PH/44 There was no timeout on the connect() call when using a Unix domain
928 socket in the ${readsocket expansion. There now is.
930 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
931 be meaningful with "accept".
933 SC/01 Eximstats V1.43
934 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
936 SC/02 Eximstats V1.44
937 Use a glob alias rather than an array ref in the generated
938 parser. This improves both readability and performance.
940 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
941 Collect SpamAssassin and rejection statistics.
942 Don't display local sender or destination tables unless
943 there is data to show.
944 Added average volumes into the top table text output.
946 SC/04 Eximstats V1.46
947 Collect data on the number of addresses (recipients)
948 as well as the number of messages.
950 SC/05 Eximstats V1.47
951 Added 'Message too big' to the list of mail rejection
952 reasons (thanks to Marco Gaiarin).
954 SC/06 Eximstats V1.48
955 Mainlog lines which have GMT offsets and are too short to
956 have a flag are now skipped.
958 SC/07 Eximstats V1.49 (Alain Williams)
959 Added the -emptyok flag.
961 SC/08 Eximstats V1.50
962 Fixes for obtaining the IP address from reject messages.
964 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
965 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
966 whitesspace changes from 4.64-PH/27
968 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
971 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
972 are found, allow negative numbers in numeric criteria)
974 JJ/06 exipick.20061117.2, added new $message_body_missing variable
976 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
977 to match changes made in 4.64-PH/43
979 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
981 PH/47 Put in an explicit test for a DNS lookup of an address record where the
982 "domain" is actually an IP address, and force a failure. This locks out
983 those revolvers/nameservers that support "A-for-A" lookups, in
984 contravention of the specifications.
986 PH/48 When a host name was looked up from an IP address, and the subsequent
987 forward lookup of the name timed out, the host name was left in
988 $sender_host_name, contrary to the specification.
990 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
991 restricted to single-key lookups, Exim was not diagnosing an error if
992 * or *@ was used with a query-style lookup.
994 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
996 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
997 long ago, but noone interested enough thought of it. Let's just say that
998 the "1.1" means that there are some new functions that weren't there at
999 some point in the past.
1001 PH/51 Error processing for expansion failure of helo_data from an smtp
1002 transport during callout processing was broken.
1004 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1005 tested/used via the -bh/-bhc/-bs options.
1007 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1008 bug, fixed in subsequent PCRE releases).
1010 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1011 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1013 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1019 SC/01 Use a glob alias rather than an array ref in eximstats generated
1020 parser. This improves both readability and performance.
1022 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1023 Don't display local sender or destination tables in eximstats unless
1024 there is data to show.
1025 Added average volumes into the eximstats top table text output.
1027 SC/03 Collect data on the number of addresses (recipients) as well
1028 as the number of messages in eximstats.
1030 TF/01 Correct an error in the documentation for the redirect router. Exim
1031 does (usually) call initgroups() when daemonizing.
1033 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1034 with consistent privilege compared to when running as a daemon.
1036 TF/03 Note in the spec that $authenticated_id is not set for local
1037 submissions from trusted users.
1039 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1040 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1042 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1043 by adding some example configuration directives to the default
1044 configuration file. A little bit of work is required to uncomment the
1045 directives and define how usernames and passwords are checked, but
1046 there is now a framework to start from.
1048 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1049 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1050 without this. I don't know how relevant this is to other LDAP libraries.
1052 PH/02 Add the verb name to the "unknown ACL verb" error.
1054 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1056 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1058 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1059 directory not expanded when it should be if an expanded home directory
1060 was set for the address (which is overridden by the transport).
1062 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1065 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1066 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1067 because it is too late at that time, and has no effect.
1069 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1070 security issue with \' (bugzilla #107). I could not use the
1071 PQescapeStringConn() function, because it needs a PGconn value as one of
1074 PH/08 When testing addresses using -bt, indicate those final addresses that
1075 are duplicates that would not cause an additional delivery. At least one
1076 person was confused, thinking that -bt output corresponded to deliveries.
1077 (Suppressing duplicates isn't a good idea as you lose the information
1078 about possibly different redirections that led to the duplicates.)
1080 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1081 systems where poll() doesn't work, in particular OS X.
1083 PH/10 Added more information to debugging output for retry time not reached.
1085 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1086 operations in malware.c.
1088 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1091 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1092 syslog_duplication set false, log lines that would normally be written
1093 both the the main log and to the reject log were not written to syslog at
1096 PH/14 In the default configuration, change the use of "message" in ACL warn
1097 statements to "add_header".
1099 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1100 not followed by a command (e.g. "seen endif").
1102 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1103 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1106 PH/17 Added extra conditions to the default value of delay_warning_condition
1110 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1111 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1112 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1115 The Auto-Submitted: and various List- headers are standardised, whereas I
1116 don't think Precedence: ever was.
1118 PH/18 Refactored debugging code in route_finduser() to show more information,
1119 in particular, the error code if getpwnam() issues one.
1121 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1122 This is apparently needed in addition to the PH/07 change above to avoid
1123 any possible encoding problems.
1125 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1126 but not after initializing Perl.
1128 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1129 output them only if debugging. By default they are written stderr,
1130 apparently, which is not desirable.
1132 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1135 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1138 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1140 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1141 authenticated or an ident call has been made. Suppress the default
1142 values for $authenticated_id and $authenticated_sender (but permit -oMai
1143 and -oMas) when testing with -bh.
1145 PH/24 Re-jigged the order of the tests in the default configuration so that the
1146 tests for valid domains and recipients precede the DNS black list and CSA
1147 tests, on the grounds that those ones are more expensive.
1149 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1150 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1151 This bug exists in every version of Exim that I still have, right back to
1154 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1155 However, an attempt to turn on case-sensitivity in a regex key by
1156 including (?-i) didn't work because the subject string was already
1157 lowercased, and the effects were non-intuitive. It turns out that a
1158 one-line patch can be used to allow (?-i) to work as expected.
1164 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1165 other effects) broke the use of negated acl sub-conditions.
1167 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1170 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1171 "Deny" causes Exim to reject the incoming connection with a 554 error.
1172 Unfortunately, if there is a major crisis, such as a disk failure,
1173 tcp-wrappers gives "deny", whereas what one would like would be some
1174 kind of temporary error. A kludge has been added to help with this.
1175 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1176 554 error is used if errno is still zero or contains ENOENT (which occurs
1177 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1180 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1182 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1183 errors. Otherwise a message that provokes a temporary error (when other
1184 messages do not) can cause a whole host to time out.
1186 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1187 addresses were routed directly to files or pipes from a redirect router.
1188 File deliveries just didn't batch; pipe deliveries might have suffered
1191 PH/06 A failure to get a lock for a hints database would erroneously always say
1192 "Failed to get write lock", even when it was really a read lock.
1194 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1195 of 0600. This has been changed to use the value of the lockfile_mode
1196 option (which defaults to 0600).
1198 PH/08 Applied small patch from the Sieve maintainer.
1200 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1201 folder from quota calculations, a direct delivery into this folder messed
1202 up the contents of the maildirsize file. This was because the regex was
1203 used only to exclude .Trash (or whatever) when the size of the mailbox
1204 was calculated. There was no check that a delivery was happening into an
1205 excluded directory. This bug has been fixed by ignoring all quota
1206 processing for deliveries into excluded directories.
1208 PH/10 Added the maildirfolder_create_regex option to appendfile.
1214 PH/01 The code for finding all the local interface addresses on a FreeBSD
1215 system running IPv6 was broken. This may well have applied to all BSD
1216 systems, as well as to others that have similar system calls. The broken
1217 code found IPv4 interfaces correctly, but gave incorrect values for the
1218 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1219 that it would not match correctly against @[] and not recognize the IPv6
1222 PH/02 The ipliteral router was not recognizing addresses of the form user@
1223 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1225 PH/03 Added disable_ipv6.
1227 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1228 decoded form, because it is most often used to construct To: headers
1229 lines in autoreplies, and the decoded form may well be syntactically
1230 invalid. However, $reply_address has leading white space removed, and all
1231 newlines turned into spaces so that the autoreply transport does not
1234 PH/05 If group was specified without a user on a router, and no group or user
1235 was specified on a transport, the group from the router was ignored.
1237 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1238 for visible compile-time settings that can be used to change these
1239 numbers, for those that want even more. Backwards compatibility with old
1240 spool files has been maintained. However, going back to a previous Exim
1241 release will lost any variables that are in spool files.
1243 PH/07 Two small changes when running in the test harness: increase delay when
1244 passing a TCP/IP connection to a new process, in case the original
1245 process has to generate a bounce, and remove special handling of
1246 127.0.0.2 (sic), which is no longer necessary.
1248 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1249 be the same on different OS.
1251 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1254 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1255 whether --show-vars was specified or not
1257 JJ/02 exipick: Added support for new ACL variable spool format introduced
1260 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1261 syntactically invalid From: or Reply-to: line, and a filter used this to
1262 generate an autoreply, and therefore failed to obtain an address for the
1263 autoreply, Exim could try to deliver to a non-existent relative file
1264 name, causing unrelated and misleading errors. What now happens is that
1265 it logs this as a hard delivery error, but does not attempt to create a
1268 PH/11 The exinext utility has a -C option for testing purposes, but although
1269 the given file was scanned by exinext itself; it wasn't being passed on
1270 when Exim was called.
1272 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1273 an end-of-file indication when reading a command response.
1275 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1276 compiled. In many other places in Exim, IPv6 addresses are always
1277 recognized, so I have changed this. It also means that IPv4 domain
1278 literals of the form [IPV4:n.n.n.n] are now always recognized.
1280 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1281 used if the router is not running as root, for example, when verifying at
1282 ACL time, or when using -bh. The debugging output from this situation was
1283 non-existent - all you got was a failure to exec. I have made two
1286 (a) Failures to set uid/gid, the current directory, or a process leader
1287 in a subprocess such as that created by queryprogram now generate
1288 suitable debugging ouput when -d is set.
1290 (b) The queryprogram router detects when it is not running as root,
1291 outputs suitable debugging information if -d is set, and then runs
1292 the subprocess without attempting to change uid/gid.
1294 PH/15 Minor change to Makefile for building test_host (undocumented testing
1297 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1298 additional section of a DNS packet that returns MX or SRV records.
1299 Instead, it always explicitly searches for A/AAAA records. This avoids
1300 major problems that occur when a DNS server includes only records of one
1301 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1302 fixed another bug: if SRV records were looked up and the corresponding
1303 address records were *not* found in the additional section, the port
1304 values from the SRV records were lost.
1306 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1307 using the correct key (the original address) when searching the retry
1308 rules in order to find which one to use for generating the retry hint.
1310 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1311 adding the default one. Similarly, if it contains a Reply-To: header, the
1312 errors_reply_to option, if set, is not used.
1314 PH/19 When calculating a retry time, Exim used to measure the "time since
1315 failure" by looking at the "first failed" field in the retry record. Now
1316 it does not use this if it is later than than the arrival time of the
1317 message. Instead it uses the arrival time. This makes for better
1318 behaviour in cases where some deliveries succeed, thus re-setting the
1319 "first failed" field. An example is a quota failure for a huge message
1320 when small messages continue to be delivered. Without this change, the
1321 "time since failure" will always be short, possible causing more frequent
1322 delivery attempts for the huge message than are intended.
1323 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1325 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1326 $1, $2, $3) because the numerical variables can be reset during some
1327 expansion items (e.g. "match"), thereby losing the authentication data.
1329 PH/21 Make -bV show the size of off_t variables so that the test suite can
1330 decide whether to run tests for quotas > 2G.
1332 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1333 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1334 filecount value is greater than 2G or if a quota value is greater than 2G
1335 on a system where the size of off_t is not greater than 4, a panic error
1338 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1339 never match. The debug and -bh output now contains an explicit error
1340 message indicating a malformed IPv4 address or mask.
1342 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1343 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1344 PH/23 above applies.
1346 PH/25 Do not write to syslog when running in the test harness. The only
1347 occasion when this arises is a failure to open the main or panic logs
1348 (for which there is an explicit test).
1350 PH/26 Added the /no_tell option to "control=freeze".
1352 PH/27 If a host name lookup failed very early in a connection, for example, if
1353 the IP address matched host_lookup and the reverse lookup yielded a name
1354 that did not have a forward lookup, an error message of the form "no IP
1355 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1356 could be logged. Now it outputs the IP address instead of "NULL".
1358 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1359 allows the sender and the authenticated sender to be set when
1360 submitting a message from within Exim. Since child_open_exim() is
1361 documented for local_scan(), the new function should be too.
1363 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1364 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1365 results in an empty string is now treated as unset.
1367 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1369 PH/31 Added sender_verify_fail logging option.
1371 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1372 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1373 tidied the source and removed it altogether.
1375 PH/33 When a queue run was abandoned because the load average was too high, a
1376 log line was always written; now it is written only if the queue_run log
1377 selector is set. In addition, the log line for abandonment now contains
1378 information about the queue run such as the pid. This is always present
1379 in "start" and "stop" lines but was omitted from the "abandon" line.
1381 PH/34 Omit spaces between a header name and the colon in the error message that
1382 is given when verify = headers_syntax fails (if there are lots of them,
1383 the message gets confusing).
1385 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1386 names, as there are now some PTR records that contain slashes. This check
1387 is only to protect against broken name servers that fall over on strange
1388 characters, so the fact that it applies to all lookups doesn't matter.
1390 PH/36 Now that the new test suite is complete, we can remove some of the
1391 special code in Exim that was needed for the old test suite. For example,
1392 sorting DNS records because real resolvers return them in an arbitrary
1393 order. The new test suite's fake resolver always returns records in the
1396 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1397 bounces) except when queue_only is set, to avoid logging races between
1398 the different processes.
1400 PH/38 Panic-die if .include specifies a non-absolute path.
1402 PH/39 A tweak to the "H" retry rule from its user.
1404 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1405 a label. They prevented compilation on older perls.
1407 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1408 a warning to be raised on newish perls.
1410 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1411 on queue. Changes to match documented behaviour of showing count of
1412 messages matching specified criteria.
1414 PH/40 Changed the default ident timeout from 30s to 5s.
1416 PH/41 Added support for the use of login_cap features, on those BSD systems
1417 that have them, for controlling the resources used by pipe deliveries.
1419 PH/42 The content-scanning code uses fopen() to create files in which to put
1420 message data. Previously it was not paying any attention to the mode of
1421 the files. Exim runs with umask(0) because the rest of the code creates
1422 files with open(), and sets the required mode explicitly. Thus, these
1423 files were ending up world-writeable. This was not a big issue, because,
1424 being within the spool directory, they were not world-accessible. I have
1425 created a function called modefopen, which takes an additional mode
1426 argument. It sets umask(777), creates the file, chmods it to the required
1427 mode, then resets the umask. All the relevant calls to fopen() in the
1428 content scanning code have been changed to use this function.
1430 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1431 to 24 hours. This avoids potential overflow problems when processing G
1432 and H retry rules. I suspect nobody ever tinkers with this value.
1434 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1436 PH/45 When the plaintext authenticator is running as a client, the server's
1437 challenges are checked to ensure they are valid base64 strings. By
1438 default, the authentication attempt is cancelled if an invalid string is
1439 received. Setting client_ignore_invalid_base64 true ignores these errors.
1440 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1441 they are received. Thus, the responses can be made to depend on the
1442 challenges. If an invalid string is ignored, an empty string is placed in
1445 PH/46 Messages that are created by the autoreply transport now contains a
1446 References: header, in accordance with RFCs 2822 and 3834.
1448 PH/47 Added authenticated_sender_force to the smtp transport.
1450 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1452 PH/49 Installed latest patch from the Sieve maintainer.
1454 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1455 was also set, the appendfile transport was unnecessarily scanning a
1456 directory of message files (e.g. for maildir delivery) to find the count
1457 of files (along with the size), even though it did not need this
1458 information. It now does the scan only if it needs to find either the
1459 size of the count of files.
1461 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1463 PH/52 Two bugs concerned with error handling when the smtp transport is
1466 (i) Exim was not creating retry information for temporary errors given
1467 for individual recipients after the DATA command when the smtp transport
1468 was used in LMTP mode. This meant that they could be retried too
1469 frequently, and not timed out correctly.
1471 (ii) Exim was setting the flag that allows error details to be returned
1472 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1473 recipients that were returned after the DATA command.
1475 PH/53 This is related to PH/52, but is more general: for any failing address,
1476 when detailed error information was permitted to be returned to the
1477 sender, but the error was temporary, then after the final timeout, only
1478 "retry timeout exceeded" was returned. Now it returns the full error as
1479 well as "retry timeout exceeded".
1481 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1482 do this, and (what is worse) MTAs that accept it.
1484 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1485 will now be deprecated.
1487 PH/56 New os.c-cygwin from the Cygwin maintainer.
1489 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1490 formats (previously only available in exim formats via -bpr, -bpru,
1491 and -bpra. Now also available in native and exiqgrep formats)
1493 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1494 with very large, slow to parse queues
1496 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1498 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1500 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1501 responses to authentication challenges, though it was showing the
1502 challenges; (ii) I've removed the CR characters from the debug output for
1505 PH/58 Allow for the insertion of a newline as well as a space when a string
1506 is turned into more than one encoded-word during RFC 2047 encoding. The
1507 Sieve code now uses this.
1509 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1510 data_4xx, lost_connection, tls_required.
1512 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1513 message was being sent as an SMTP response.
1515 PH/61 Add -l and -k options to exicyclog.
1517 PH/62 When verifying, if an address was redirected to one new address, so that
1518 verification continued, and the new address failed or deferred after
1519 having set something in $address_data, the value of $address_data was not
1520 passed back to the ACL. This was different to the case when no
1521 redirection occurred. The value is now passed back in both cases.
1523 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1524 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1525 use login_cap.h, so on its own it isn't the distinguishing feature. The
1526 new name refers directly to the setclassresources() function.
1528 PH/65 Added configuration files for NetBSD3.
1530 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1532 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1533 is preferred over IPv4.
1535 PH/68 The bounce_return_message and bounce_return_body options were not being
1536 honoured for bounces generated during the reception of non-SMTP messages.
1537 In particular, this applied to messages rejected by the ACL. This bug has
1538 been fixed. However, if bounce_return_message is true and bounce_return_
1539 body is false, the headers that are returned for a non-SMTP message
1540 include only those that have been read before the error was detected.
1541 (In the case of an ACL rejection, they have all been read.)
1543 PH/69 The HTML version of the specification is now built in a directory called
1544 spec_html instead of spec.html, because the latter looks like a path with
1545 a MIME-type, and this confuses some software.
1547 PH/70 Catch two compiler warnings in sieve.c.
1549 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1550 function verify_get_ident() calls ip_connect() to connect a socket, but
1551 if the "connect()" function timed out, ip_connect() used to close the
1552 socket. However, verify_get_ident() also closes the socket later, and in
1553 between Exim writes to the log, which may get opened at this point. When
1554 the socket was closed in ip_connect(), the log could get the same file
1555 descriptor number as the socket. This naturally causes chaos. The fix is
1556 not to close the socket in ip_connect(); the socket should be closed by
1557 the function that creates it. There was only one place in the code where
1558 this was missing, in the iplookup router, which I don't think anybody now
1559 uses, but I've fixed it anyway.
1561 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1562 well as to direct DNS lookups. Otherwise the handling of names in host
1563 lists is inconsistent and therefore confusing.
1569 PH/01 Two changes to the default runtime configuration:
1571 (1) Move the checks for relay_from_hosts and authenticated clients from
1572 after to before the (commented out) DNS black list checks.
1574 (2) Add control=submission to the relay_from_hosts and authenticated
1575 clients checks, on the grounds that messages accepted by these
1576 statements are most likely to be submissions.
1578 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1580 (1) Generate an error if the third argument for the ${prvs expansion is
1583 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1586 (3) Reset the variables that are obtained from the first argument of
1587 ${prvscheck and used in the second argument before leaving the code,
1588 because their memory is reclaimed, so using them afterwards may do
1591 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1592 one (it's much easier than Tom thought :-).
1594 (5) Because of (4), we can now allow for the use of $prvscheck_result
1595 inside the third argument.
1597 PH/03 For some reason, the default setting of PATH when running a command from
1598 a pipe transport was just "/usr/bin". I have changed it to
1601 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1602 anything to be listed in the output from -bV.
1604 PH/05 When a filter generated an autoreply, the entire To: header line was
1605 quoted in the delivery log line, like this:
1607 => >A.N.Other <ano@some.domain> <original@ddress> ...
1609 This has been changed so that it extracts the operative address. There
1610 may be more than one such address. If so, they are comma-separated, like
1613 => >ano@some.domain,ona@other.domain <original@ddress> ...
1615 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1616 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1617 not being looked up in the rDNS to get a host name, Exim was showing the
1618 IP address twice in Received: lines, even though the IP addresses were
1619 identical. For example:
1621 Received: from [1.2.3.4] (helo=[1.2.3.4])
1623 However, if the real host name was known, it was omitting the HELO data
1624 if it matched the actual IP address. This has been tidied up so that it
1625 doesn't show the same IP address twice.
1627 PH/07 When both +timestamp and +memory debugging was on, the value given by
1628 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1629 called by the debug printing, thereby overwriting the timestamp buffer.
1630 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1632 PH/08 When the original message was included in an autoreply transport, it
1633 always said "this is a copy of the message, including all the headers",
1634 even if body_only or headers_only was set. It now gives an appropriate
1637 PH/09 Applied a patch from the Sieve maintainer which:
1639 o fixes some comments
1640 o adds the (disabled) notify extension core
1641 o adds some debug output for the result of if/elsif tests
1642 o points to the current vacation draft in the documentation
1643 and documents the missing references header update
1647 o fixes a bug in processing the envelope test (when testing
1648 multiple envelope elements, the last element determinted the
1651 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1652 Electronic Mail") by including:
1654 Auto-submitted: auto-generated
1656 in the messages that it generates (bounce messages and others, such as
1657 warnings). In the case of bounce messages for non-SMTP mesages, there was
1658 also a typo: it was using "Auto_submitted" (underscore instead of
1659 hyphen). Since every message generated by Exim is necessarily in response
1660 to another message, thes have all been changed to:
1662 Auto-Submitted: auto-replied
1664 in accordance with these statements in the RFC:
1666 The auto-replied keyword:
1668 - SHOULD be used on messages sent in direct response to another
1669 message by an automatic process,
1671 - MUST NOT be used on manually-generated messages,
1673 - MAY be used on Delivery Status Notifications (DSNs) and Message
1674 Disposition Notifications (MDNs),
1676 - MUST NOT be used on messages generated by automatic or periodic
1677 processes, except for messages which are automatic responses to
1680 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1681 to the default Received: header definition.
1683 PH/12 Added log selector acl_warn_skipped (default on).
1685 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1686 variables because (a) they are in the wrong storage pool and (b) even if
1687 they were copied, it wouldn't work properly because of the caching.
1689 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1690 checking when decoding. Apparently there are clients that generate
1691 overlong encoded strings. Why am I not surprised?
1693 PH/15 If the first argument of "${if match_address" was not empty, but did not
1694 contain an "@" character, Exim crashed. Now it writes a panic log message
1695 and treats the condition as false.
1697 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1699 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1700 extension "envelope-auth". The code is finished and in agreement with
1701 other implementations, but there is no documentation so far and in fact,
1702 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1703 not changing the active code.
1705 Print executed "if" and "elsif" statements when debugging is used. This
1706 helps a great deal to understand what a filter does.
1708 Document more things not specified clearly in RFC3028. I had all this
1709 sorted out, when out of a sudden new issues came to my mind. Oops."
1711 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1714 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1715 canonical form (as documented). However, after a host name lookup from
1716 the IP address, check_host() was doing a simple string comparison with
1717 addresses acquired from the DNS when checking that the found name did
1718 have the original IP as one of its addresses. Since any found IPv6
1719 addresses are likely to be in abbreviated form, the comparison could
1720 fail. Luckily, there already exists a function for doing the comparison
1721 by converting both addresses to binary, so now that is used instead of
1722 the text comparison.
1724 PH/20 There was another similar case to PH/19, when a complete host name was
1725 given in a host list; looking up its IP address could give an abbreviated
1726 form, whereas the current host's name might or might not be abbreviated.
1727 The same fix has been applied.
1733 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1734 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1737 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1738 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1740 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1742 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1743 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1744 Also, for "Auto-Submitted", treat anything other than "no" as
1745 non-personal, in accordance with RFC 3834. (Previously it treated
1746 anything starting "auto-" as non-personal.)
1748 TF/01 The control=submission/name=... option had a problem with syntax
1749 errors if the name included a slash character. The /name= option
1750 now slurps the rest of the string, so it can include any characters
1751 but it must come last in the list of options (after /sender_retain
1754 PH/05 Some modifications to the interface to the fake nameserver for the new
1762 TK/01 Added the "success_on_redirect" address verification option. See
1763 NewStuff for rationale and an example.
1765 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1767 PH/02 Patch to exigrep to allow it to work on syslog lines.
1769 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1770 fread() to skip over the body file's header line, because in Cygwin the
1771 header line is locked and is inaccessible.
1773 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1774 co-exist for some time) to make it clear that it is the Exim ID that is
1775 referenced, not the Message-ID: header line.
1777 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1778 string_format() function, because snprintf() does not exist on all
1781 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1782 ${stat: expansion item.
1784 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1785 protocol synchronization error", to keep the pedants happy.
1787 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1788 well as for IRIX systems, when gcc is being used. See the host.c source
1791 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1793 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1796 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1797 transport and to the smtp transport in LMTP mode.
1799 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1801 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1802 run a filter in a subprocess. This could lead to confusion in subsequent
1803 lookups in the parent process. There should also be a search_tidyup() at
1804 the end of the subprocess.
1806 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1807 only if the host matched helo_try_verify_hosts, which caused the
1808 verification to occur when the EHLO/HELO command was issued. The ACL just
1809 tested the remembered result. Now, if a previous verification attempt has
1810 not happened, "verify = helo" does it there and then.
1812 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1814 TK/03 Fix log output including CR from clamd.
1816 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1817 exist provoked a memory error which could cause a segfault.
1819 PH/15 Installed PCRE 6.2
1821 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1823 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1824 of the problem. Specifically, suggested +O2 rather than +O1 for the
1827 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1829 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1830 record, the port was not correctly logged when the outgoing_port log
1831 selector was set (it logged the transort's default port).
1833 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1834 fallback_hosts, and "hosts" in the smtp transport.
1836 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1837 host errors such as "Connection refused".
1839 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1840 authentication with radiusclient 0.4.9:
1842 - Error returned from rc_read_config was caught wrongly
1843 - Username/password not passed on to radius server due to wrong length.
1845 The presumption is that some radiusclient API changes for 4.51/PH/17
1846 were not taken care of correctly. The code is still untested by me (my
1847 Linux distribution still has 0.3.2 of radiusclient), but it was
1848 contributed by a Radius user.
1850 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1851 expanding the "port" option of the smtp transport.
1853 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1854 while reading a MIME header. Thanks to Tom Hughes for a patch.
1856 PH/24 Include config.h inside local_scan.h so that configuration settings are
1859 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1860 that in an ACL for RCPT (for example), you can examine exactly what was
1863 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1864 commands, but it was not correctly comparing the address with the actual
1865 client host address. Thus, it would show the EHLO address in Received:
1866 header lines when this was not necessary.
1868 PH/27 Added the % operator to ${eval:}.
1870 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1871 it should be ignoring failures (because with -C, for example, it has lost
1872 privilege). It wasn't ignoring creation failures other than "already
1875 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1878 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1879 because an input line was too long, either on its own, or by virtue of
1880 too many continuations, the temporary file was not being removed, and the
1881 return code was incorrect.
1883 PH/31 Missing "BOOL" in function definition in filtertest.c.
1885 PH/32 Applied Sieve patches from the maintainer.
1887 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1889 PH/33 Added "verify = not_blind".
1891 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1892 Local/Makefile (with some defaults set). These are used in built scripts
1893 such as exicyclog, but they have never been used in the exim_install
1894 script (though there are many overriding facilities there). I have
1895 arranged that the exim_install script now takes note of these two
1898 PH/35 Installed configuration files for Dragonfly.
1900 PH/36 When a locally submitted message by a trusted user did not contain a
1901 From: header, and the sender address was obtained from -f or from an SMTP
1902 MAIL command, and the trusted user did not use -F to supply a sender
1903 name, $originator_name was incorrectly used when constructing a From:
1904 header. Furthermore, $originator_name was used for submission mode
1905 messages from external hosts without From: headers in a similar way,
1906 which is clearly wrong.
1908 PH/37 Added control=suppress_local_fixups.
1910 PH/38 When log_selector = +received_sender was set, and the addition of the
1911 sender made the log line's construction buffer exactly full, or one byte
1912 less than full, an overflow happened when the terminating "\n" was
1915 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1916 when the result of a list match is failure because a DNS lookup failed.
1918 PH/40 RM_COMMAND is now used in the building process.
1920 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1921 the "build-* directories that it finds.
1923 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1924 address in a domain literal was a prefix of an interface address.
1926 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1927 when verifying a sender address, unless rewrite_headers is false.
1929 PH/44 Wrote a long comment about why errors_to addresses are verified as
1930 recipients, not senders.
1932 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1933 the ratelimit ACL was added.
1935 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1937 PH/46 Added extra information about PostgreSQL errors to the error string.
1939 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1940 avoiding the need to install special zones in a real server. This is
1941 backwards compatible; if it can't find the fake resolver, it drops back.
1942 Thus, both old and new test suites can be run.
1944 TF/02 Added util/ratelimit.pl
1946 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1947 clock is set back in time.
1949 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1950 Candler <B.Candler@pobox.com>.
1952 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1953 OK for addresses that are the result of redirections.
1955 PH/48 A number of further additions for the benefit of the new test suite,
1956 including a fake gethostbyname() that interfaces to the fake DNS resolver
1959 TF/06 The fix for widen_domains has also been applied to qualify_single and
1960 search_parents which are the other dnslookup options that can cause
1963 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1966 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1968 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1969 service" if it encountered an MX record with an empty target hostname.
1970 The message is now "an MX or SRV record indicated no SMTP service".
1972 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1973 if the DNS of the sending site is misconfigured. This is quite a
1974 common situation. This change restores the behaviour of treating a
1975 helo verification defer as a failure.
1977 PH/51 If self=fail was set on a router, the bounce message did not include the
1978 actual error message.
1984 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1986 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1987 command itself ended in error, the underlying message about the transport
1988 filter timeout was being overwritten with the pipe command error. Now the
1989 underlying error message should be appended to the second error message.
1991 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1993 PH/02 Reduce the amount of output that "make" produces by default. Full output
1994 can still be requested.
1996 PH/03 The warning log line about a condition test deferring for a "warn" verb
1997 was being output only once per connection, rather than after each
1998 occurrence (because it was using the same function as for successful
1999 "warn" verbs). This seems wrong, so I have changed it.
2001 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2002 it should not have, which might have caused a crash in the right
2003 circumstances, but probably never did.
2005 PH/04 Installed a modified version of Tony Finch's patch to make submission
2006 mode fix the return path as well as the Sender: header line, and to
2007 add a /name= option so that you can make the user's friendly name appear
2010 TF/03 Added the control = fakedefer ACL modifier.
2012 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2013 Mark Lowes for thorough testing.
2015 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2017 TK/03 Merged latest SRS patch from Miles Wilton.
2019 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2020 with the definition in sysexits.h (which is #included earlier).
2021 Fortunately, Exim does not actually use EX_OK. The code used to try to
2022 preserve the sysexits.h value, by assumimg that macro definitions were
2023 scanned for macro replacements. I have been disabused of this notion,
2024 so now the code just undefines EX_OK before #including unistd.h.
2026 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2027 in the smtp transport. When a block could not be written in a single
2028 write() function, the timeout was being re-applied to each part-write.
2029 This seems wrong - if the receiver was accepting one byte at a time it
2030 would take for ever. The timeout is now adjusted when this happens. It
2031 doesn't have to be particularly precise.
2033 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2034 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2036 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2037 without a domain if the check to <postmaster@domain> fails.
2039 SC/01 Eximstats: added -xls and the ability to specify output files
2040 (patch written by Frank Heydlauf).
2042 SC/02 Eximstats: use FileHandles for outputing results.
2044 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2046 SC/04 Eximstats: fixed display of large numbers with -nvr option
2048 SC/05 Eximstats: fixed merging of reports with empty tables.
2050 SC/06 Eximstats: added the -include_original_destination flag
2052 SC/07 Eximstats: removed tabs and trailing whitespace.
2054 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2056 TK/06 MBOX spool code: Add real "From " MBOX separator line
2057 so the .eml file is really in mbox format (even though
2058 most programs do not really care). Patch from Alex Miller.
2060 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2061 The latter is generated from $received_to and is only set if the
2062 message has one envelope recipient. SA can use these headers,
2063 obviously out-of-the-box. Patch from Alex Miller.
2065 PH/08 The ${def test on a variable was returning false if the variable's
2066 value was "0", contrary to what the specification has always said!
2067 The result should be true unless the variable is empty.
2069 PH/09 The syntax error of a character other than { following "${if
2070 def:variable_name" (after optional whitespace) was not being diagnosed.
2071 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2072 accidental colon was present, for example, could give incorrect results.
2074 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2075 result is used (not including appendfile, where other changes are about
2078 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2079 This involved changing a lot of size variables from int to off_t. It
2080 should work with maildirs and everything.
2082 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2083 spamd dying while we are connected to it.
2085 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2088 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2089 function for BDB 4.3.
2091 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2093 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2094 the sources for PCRE have been re-arranged and more files are now
2097 PH/15 The code I had for printing potentially long long variables in PH/11
2098 above was not the best (it lost precision). The length of off_t variables
2099 is now inspected at build time, and an appropriate printing format (%ld
2100 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2101 to be "long long int" or "long int". This is needed for the internal
2102 formatting function string_vformat().
2104 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2105 the configuration file to be ":syslog", then the script "guesses" where
2106 the logs files are, rather than using the compiled in default. In our
2107 case the guess is not the same as the compiled default, so the script
2108 suddenly stopped working when I started to use syslog. The patch checks
2109 to see if log_file_path is "". If so, it attempts to read it from exim
2110 with no configuration file to get the compiled in version, before it
2111 falls back to the previous guessing code."
2113 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2114 implementing BATV in an Exim configuration. See NewStuff for the gory
2117 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2118 Makefile that are specific to HP-UX.
2120 PH/18 If the "use_postmaster" option was set for a recipient callout together
2121 with the "random" option, the postmaster address was used as the MAIL
2122 FROM address for the random test, but not for the subsequent recipient
2123 test. It is now used for both.
2125 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2126 patch removes a few documentation additions to RFC 3028, because the
2127 latest draft now contains them. It adds the new en;ascii-case comparator
2128 and a new error check for 8bit text in MIME parts. Comparator and
2129 require names are now matched exactly. I enabled the subaddress
2130 extension, but it is not well tested yet (read: it works for me)."
2132 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2133 rework some of the code of TK/09 above to avoid the hardwired use of
2134 "%lld" and "long long". Replaced the call to snprintf() with a call to
2137 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2138 records point to non-existent hosts", "retry timeout exceeded", and
2139 "retry time not reached for any host after a long failure period".
2141 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2142 experimental DomainKeys support:
2144 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2145 (2) On an error such as an illegally used "control", the wrong name for
2146 the control was given.
2148 These problems did NOT occur unless DomainKeys support was compiled.
2150 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2152 PH/24 Added ${if match_ip condition.
2154 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2155 databases so that it will be absolutely obvious if a crash occurs in the
2156 DB library. This is a regular occurrence (often caused by mis-matched
2159 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2160 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2161 picked up on a user's system that detects such things. There doesn't seem
2162 to be a gcc warning option for this - only an attribute that has to be
2163 put on the function's prototype. It seems that in Fedora Core 4 they have
2164 set this on a number of new functions. No doubt there will be more in due
2167 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2168 specify a transport. However, if an address that was verified by such a
2169 router was the subject of a callout, Exim crashed because it tried to
2170 read the rcpt_include_affixes from the non-existent transport. Now it
2171 just assumes that the setting of that option is false. This bug was
2172 introduced by 4.51/PH/31.
2174 PH/28 Changed -d+all to exclude +memory, because that information is very
2175 rarely of interest, but it makes the output a lot bigger. People tend to
2176 do -d+all out of habit.
2178 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2179 code in os-type was giving problems when libc.so lives in lib64, like on
2182 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2183 aren't the modern standard, and it seems that some systems' include files
2184 don't always have them. Exim was already checking for some of the newer
2185 ones like T_AAAA, and defining it itself. I've added checks for all the
2186 record types that Exim uses.
2188 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2189 not automatically generating a new one, as it is supposed to. This
2190 prevented TLS from working. If the file did exist, but contained invalid
2191 data, a new version was generated, as expected. It was only the case of a
2192 non-existent file that was broken.
2194 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2195 with a change in libdomainkeys > 0.64.
2197 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2198 from DNS. If the selector record carries the flag, it now has
2199 precedence over the domain-wide flag.
2201 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2203 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2204 the use of a port name that isn't defined in /etc/services) occurred, the
2205 message was deferred as in a normal delivery, and thus remained on the
2206 spool, instead of being failed because of the mua_wrapper setting. This
2207 is now fixed, and I tidied up some of the mua_wrapper messages at the
2210 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2211 the messages in a hash of arrays rather than using individual hashes.
2212 This is a bit cleaner and results in dramatic memory savings, albeit
2213 at a slight CPU cost.
2215 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2216 as requested by Marc Sherman.
2218 SC/10 Eximstats: added histograms for user specified patterns as requested
2221 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2223 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2224 fopen() in the content-scanning modules that did not already have it.
2230 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2231 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2233 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2235 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2237 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2238 to test Sieve filters that use "vacation".
2240 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2241 that changes the way the GnuTLS parameters are stored in the cache file.
2242 The new format can be generated externally. For backward compatibility,
2243 if the data in the cache doesn't make sense, Exim assumes it has read an
2244 old-format file, and it generates new data and writes a new file. This
2245 means that you can't go back to an older release without removing the
2248 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2249 work if there are any delivery delays because "one_time" forces the
2250 parent to be marked "delivered", so its unseen clone is never tried
2251 again. For this reason, Exim now forbids the simultaneous setting of
2254 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2255 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2256 entry if you want to know the details. The fix, however, neglected to
2257 consider the case when local delivery batching is involved. The test for
2258 "previously delivered" was not happening when checking to see if an
2259 address could be batched with a previous (undelivered) one; under
2260 certain circumstances this could lead to multiple deliveries to the same
2263 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2264 in its include files, and this causes problems building Exim.
2266 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2267 header_syntax) but Exim was just ignoring anything given after a slash.
2268 In particular, this caused confusion with an attempt to use "verify =
2269 reverse_host_lookup/defer_ok". An error is now given when options are
2270 supplied for verify items that do not have them. (Maybe reverse_host_
2271 lookup should have a defer_ok option, but that's a different point.)
2273 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2274 defined by RFC 821) to 2048, because there were problems with some AUTH
2275 commands, and RFC 1869 says the size should be increased for extended
2276 SMTP commands that take arguments.
2278 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2281 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2282 "unknown" error; now it says that the functionality isn't in the binary.
2284 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2285 an address' error message when a string expansion fails (syntax or
2286 whatever). Otherwise the password may appear in the log. Following change
2287 PH/42 below, there is no longer a chance of it appearing in a bounce
2290 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2292 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2293 of its addresses was ever tried. (Bugzilla bug #2.)
2295 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2296 the result incorrectly in the debug output. (It correctly added a newline
2297 to what was transported.)
2299 TF/01 Added $received_time.
2301 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2302 commented out examples of how to interface to a virus scanner and to
2303 SpamAssassin. Also added commented examples of av_scanner and
2304 spamd_address settings.
2306 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2307 and controls are allowed in which ACLs. There were a couple of minor
2308 errors. Some of the entries in the conditions table (which is a table of
2309 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2310 negation of where the condition IS allowed.
2312 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2314 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2315 header file does not have a version number, so I've had to invent a new
2316 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2317 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2318 radiusclient), but it was contributed by a Radius user.
2320 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2321 files or directories, for OpenSSL.
2323 PH/19 When an Exim process that is running as root has to create an Exim log
2324 file, it does so in a subprocess that runs as exim:exim so as to get the
2325 ownership right at creation (otherwise, other Exim processes might see
2326 the file with the wrong ownership). There was no test for failure of this
2327 fork() call, which would lead to the process getting stuck as it waited
2328 for a non-existent subprocess. Forks do occasionally fail when resources
2329 run out. I reviewed all the other calls to fork(); they all seem to check
2332 PH/20 When checking for unexpected SMTP input at connect time (before writing
2333 the banner), Exim was not dealing correctly with a non-positive return
2334 from the read() function. If the client had disconnected by this time,
2335 the result was a log entry for a synchronization error with an empty
2336 string after "input=" when read() returned zero. If read() returned -1
2337 (an event I could not check), uninitialized data bytes were printed.
2338 There were reports of junk text (parts of files, etc) appearing after
2341 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2343 PH/22 Added support for macro redefinition, and (re)definition in between
2344 driver and ACL definitions.
2346 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2347 forgetting to use the resulting value; it was using the unexpanded value.
2349 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2350 hadn't been configured. The fix is from Juergen Kreileder, who
2351 understands it better than I do:
2353 "Here's what I see happening with three configured cyrus_sasl
2354 authenticators configured (plain, login, cram-md5):
2356 On startup auth_cyrus_sasl_init() gets called for each of these.
2357 This means three calls to sasl_listmech() without a specified mech_list.
2358 => SASL tests which mechs of all available mechs actually work
2359 => three warnings about OTP not working
2360 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2362 With the patch, sasl_listmech() also gets called three times. But now
2363 SASL's mech_list option is set to the server_mech specified in the the
2364 authenticator. Or in other words, the answer from sasl_listmech()
2365 gets limited to just the mech you're testing for (which is different
2367 => the return list contains just 'plain' or 'login', 'cram-md5' or
2368 nothing depending on the value of ob->server_mech.
2370 I've just tested the patch: Authentication still works fine,
2371 unavailable mechs specified in the exim configuration are still
2372 caught, and the auth.log warnings about OTP are gone."
2374 PH/25 When debugging is enabled, the contents of the command line are added
2375 to the debugging output, even when log_selector=+arguments is not
2378 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2379 answer is "GNU", and only if the return is "GNU/something" is the answer
2382 PH/27 $acl_verify_message is now set immediately after the failure of a
2383 verification in an ACL, and so is available in subsequent modifiers. In
2384 particular, the message can be preserved by coding like this:
2386 warn !verify = sender
2387 set acl_m0 = $acl_verify_message
2389 Previously, $acl_verify_message was set only while expanding "message"
2390 and "log_message" when a very denied access.
2392 PH/28 Modified OS/os.c-Linux with
2394 -#ifndef OS_LOAD_AVERAGE
2395 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2397 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2398 nomenclature these days.)
2400 PH/29 Installed patch from the Sieve maintainer that adds the options
2401 sieve_useraddress and sieve_subaddress to the redirect router.
2403 PH/30 In these circumstances:
2404 . Two addresses routed to the same list of hosts;
2405 . First host does not offer TLS;
2406 . First host accepts first address;
2407 . First host gives temporary error to second address;
2408 . Second host offers TLS and a TLS session is established;
2409 . Second host accepts second address.
2410 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2411 and peerdn, if requested) that were in fact used only for the second
2414 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2415 attention to any local part prefix or suffix that was matched by the
2416 router that accepted the address. It now behaves in the same way as it
2417 does for delivery: the affixes are removed from the local part unless
2418 rcpt_include_affixes is set on the transport.
2420 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2421 timeout during the DATA phase of an incoming message.
2423 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2424 applied a patch sanctioned by the Sieve maintainer.
2426 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2427 the uid or gid is negative. A case of a negative gid caused this to be
2428 noticed. The fix allows for either to be negative.
2430 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2431 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2434 PH/36 The change PH/12 above was broken. Fixed it.
2436 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2437 the grounds that routing the same address twice would always produce the
2438 same answer. This might have been true once, but it is certainly no
2439 longer true now. Routing a child address may depend on the previous
2440 routing that produced that child. Some complicated redirection strategies
2441 went wrong when messages had multiple recipients, and made Exim's
2442 behaviour dependent on the order in which the addresses were given.
2444 I have moved the duplicate checking until after the routing is complete.
2445 Exim scans the addresses that are assigned to local and remote
2446 transports, and removes any duplicates. This means that more work will be
2447 done, as duplicates will always all be routed, but duplicates are
2448 presumably rare, so I don't expect this is of any significance.
2450 For deliveries to pipes, files, and autoreplies, the duplicate checking
2451 still happens during the routing process, since they are not going to be
2454 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2455 It corrects a timeout issue with spamd. This is Ian's comment: "The
2456 background is that sometimes spamd either never reads data from a
2457 connection it has accepted, or it never writes response data. The exiscan
2458 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2459 blindly assumes that writes won't block so it may never time out."
2461 PH/39 Allow G after quota size as well as K and M.
2463 PH/40 The value set for $authenticated_id in an authenticator may not contain
2464 binary zeroes or newlines because the value is written to log lines and
2465 to spool files. There was no check on this. Now the value is run through
2466 the string_printing() function so that such characters are converted to
2467 printable escape sequences.
2469 PH/41 $message_linecount is a new variable that contains the total number of
2470 lines in the message. Compare $body_linecount, which is the count for the
2473 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2474 bounce and delay warning messages, except in certain special cases, which
2477 (a) An SMTP error message from a remote host;
2478 (b) A message specified in a :fail: redirection;
2479 (c) A message specified in a "fail" command in a system filter;
2480 (d) A message specified in a FAIL return from the queryprogram router;
2481 (e) A message specified by the cannot_route_message router option.
2483 In these cases only, Exim does include the error details in bounce and
2484 warning messages. There are also a few cases where bland messages such
2485 as "unrouteable address" or "local delivery error" are given.
2487 PH/43 $value is now also set for the "else" part of a ${run expansion.
2489 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2490 being worked on, but at least Exim now implements the latest version to
2493 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2494 process to complete was treated as a delivery failure, a timeout while
2495 writing the message to the pipe was logged, but erroneously treated as a
2496 successful delivery. Such timeouts include transport filter timeouts. For
2497 consistency with the overall process timeout, these timeouts are now
2498 treated as errors, giving rise to delivery failures by default. However,
2499 there is now a new Boolean option for the pipe transport called
2500 timeout_defer, which, if set TRUE, converts the failures into defers for
2501 both kinds of timeout. A transport filter timeout is now identified in
2504 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2505 systems where "make" and "gmake" are different, calling "gmake" at top
2506 level broke things. I've arranged for the value of $(MAKE) to be passed
2507 from the Makefile to this script so that it can call the same version of
2511 A note about Exim versions 4.44 and 4.50
2512 ----------------------------------------
2514 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2515 changes of various kinds. As a consequence, a big documentation update was
2516 needed. This delayed the release for rather longer than seemed good, especially
2517 in the light of a couple of (minor) security issues. Therefore, the changes
2518 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2519 release. So 4.44 and 4.50 are in effect two different branches that both start
2522 I have left the 4.50 change log unchanged; it contains all the changes since
2523 4.43. The change log for 4.44 is below; many of its items are identical to
2524 those for 4.50. This seems to be the most sensible way to preserve the
2525 historical information.
2531 1. Minor wording change to the doc/README.SIEVE file.
2533 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2534 computation of the current number of files was incorrect.
2536 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2537 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2540 4. Give more explanation in the error message when the command for a transport
2541 filter fails to execute.
2543 5. There are several places where Exim runs a non-Exim command in a
2544 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2545 was being done only for the command run by the queryprogram router. It is
2546 now done for all such subprocesses. The other cases are: ${run, transport
2547 filters, and the commands run by the lmtp and pipe transports.
2549 6. Added CONFIGURE_GROUP build-time option.
2551 7. Some older OS have a limit of 256 on the maximum number of file
2552 descriptors. Exim was using setrlimit() to set 1000 as a large value
2553 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2554 systems. I've change it so that if it can't get 1000, it tries for 256.
2556 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2557 was an oversight, and furthermore, ever since the addition of extra
2558 controls (e.g. 4.43/32), the checks on when to allow different forms of
2559 "control" were broken. There should now be diagnostics for all cases when a
2560 control that does not make sense is encountered.
2562 9. Added the /retain_sender option to "control=submission".
2564 10. $recipients is now available in the predata ACL (oversight).
2566 11. Tidy the search cache before the fork to do a delivery from a message
2567 received from the command line. Otherwise the child will trigger a lookup
2568 failure and thereby defer the delivery if it tries to use (for example) a
2569 cached ldap connection that the parent has called unbind on.
2571 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2572 of $address_data from the recipient verification was clobbered by the
2573 sender verification.
2575 13. The value of address_data from a sender verification is now available in
2576 $sender_address_data in subsequent conditions in the ACL statement.
2578 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2580 15. Added a new option "connect=<time>" to callout options, to set a different
2583 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2584 was its contents. (It was OK if the option was not defined at all.)
2586 17. A "Completed" log line is now written for messages that are removed from
2587 the spool by the -Mrm option.
2589 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2590 information about exactly what failed.
2592 19. Added -dd to debug only the daemon process.
2594 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2595 handles timeouts, both on the server side and network timeouts. Renamed the
2596 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2598 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2599 It is now set to "smtps".
2601 22. $host_address is now set to the target address during the checking of
2602 ignore_target_hosts.
2604 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2605 being passed; this would have caused $sender_host_name to have been used if
2606 matching the list had actually called for a host name (not very likely,
2607 since this list is usually IP addresses). A host name is now passed as
2610 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2611 code that specifies a non-restarting handler (typically sigaction() in
2612 modern systems) in an attempt to fix a rare and obscure crash bug.
2614 25. Narrowed the window for a race in the daemon that could cause it to ignore
2615 SIGCHLD signals. This is not a major problem, because they are used only to
2616 wake it up if nothing else does.
2618 26. A malformed maildirsize file could cause Exim to calculate negative values
2619 for the mailbox size or file count. Odd effects could occur as a result.
2620 The maildirsize information is now recalculated if the size or filecount
2623 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2624 support for a long time. Removed HAVE_SYS_VFS_H.
2626 28. Installed the latest version of exipick from John Jetmore.
2628 29. In an address list, if the pattern was not a regular expression, an empty
2629 subject address (from a bounce message) matched only if the pattern was an
2630 empty string. Non-empty patterns were not even tested. This was the wrong
2631 because it is perfectly reasonable to use an empty address as part of a
2632 database query. An empty address is now tested by patterns that are
2633 lookups. However, all the other forms of pattern expect the subject to
2634 contain a local part and a domain, and therefore, for them, an empty
2635 address still always fails if the pattern is not itself empty.
2637 30. Exim went into a mad DNS loop when attempting to do a callout where the
2638 host was specified on an smtp transport, and looking it up yielded more
2639 than one IP address.
2641 31. Re-factored the code for checking spool and log partition space into a
2642 function that finds that data and another that does the check. The former
2643 is then used to implement four new variables: $spool_space, $log_space,
2644 $spool_inodes, and $log_inodes.
2646 32. The RFC2047 encoding function was originally intended for short strings
2647 such as real names; it was not keeping to the 75-character limit for
2648 encoded words that the RFC imposes. It now respects the limit, and
2649 generates multiple encoded words if necessary. To be on the safe side, I
2650 have increased the buffer size for the ${rfc2047: expansion operator from
2653 33. It is now permitted to omit both strings after an "if" condition; if the
2654 condition is true, the result is "true". As before, when the second string
2655 is omitted, a false condition yields an empty string. This makes it less
2656 cumbersome to write custom ACL and router conditions.
2658 34. Failure to deliver a bounce message always caused it to be frozen, even if
2659 there was an errors_to setting on the router. The errors_to setting is now
2662 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2663 canonical form (fully expanded) before being placed in
2664 $sender_host_address.
2666 36. The table in the code that translates DNS record types into text (T_A to
2667 "A" for instance) was missing entries for NS and CNAME. It is just possible
2668 that this could have caused confusion if both these types were looked up
2669 for the same domain, because the text type is used as part of Exim's
2670 per-process caching. But the chance of anyone hitting this buglet seems
2673 37. The dnsdb lookup has been extended in a number of ways.
2675 (1) There is a new type, "zns", which walks up the domain tree until it
2676 finds some nameserver records. It should be used with care.
2678 (2) There is a new type, "mxh", which is like "mx" except that it returns
2679 just the host names, not the priorities.
2681 (3) It is now possible to give a list of domains (or IP addresses) to be
2682 looked up. The behaviour when one of the lookups defers can be
2683 controlled by a keyword.
2685 (4) It is now possible to specify the separator character for use when
2686 multiple records are returned.
2688 38. The dnslists ACL condition has been extended: it is now possible to supply
2689 a list of IP addresses and/or domains to be looked up in a particular DNS
2692 39. Added log_selector=+queue_time_overall.
2694 40. When running the queue in the test harness, wait just a tad after forking a
2695 delivery process, to get repeatability of debugging output.
2697 41. Include certificate and key file names in error message when GnuTLS fails
2698 to set them up, because the GnuTLS error message doesn't include the name
2699 of the failing file when there is a problem reading it.
2701 42. Allow both -bf and -bF in the same test run.
2703 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2705 44. The "Exiscan patch" is now merged into the mainline Exim source.
2707 45. Sometimes the final signoff response after QUIT could fail to get
2708 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2709 < 0 before doing a fflush(). This bug looks as though it goes back to the
2710 introduction of TLS in release 3.20, but "sometimes" must have been rare
2711 because the tests only now provoked it.
2713 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2714 (this can affect the format of dates).
2716 47. exim_tidydb, when checking for the continued existence of a message for
2717 which it has found a message-specific retry record, was not finding
2718 messages that were in split spool directories. Consequently, it was
2719 deleting retry records that should have stayed in existence.
2721 48. Steve fixed some bugs in eximstats.
2723 49. The SPA authentication driver was not abandoning authentication and moving
2724 on to the next authenticator when an expansion was forced to fail,
2725 contradicting the general specification for all authenticators. Instead it
2726 was generating a temporary error. It now behaves as specified.
2728 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2729 (the order specifies the preference for clients). The order is now AES256,
2730 AES128, 3DES, ARCFOUR128.
2732 51. Small patch to Sieve code - explicitly set From: when generating an
2735 52. Exim crashed if a remote delivery caused a very long error message to be
2736 recorded - for instance if somebody sent an entire SpamAssassin report back
2737 as a large number of 550 error lines. This bug was coincidentally fixed by
2738 increasing the size of one of Exim's internal buffers (big_buffer) that
2739 happened as part of the Exiscan merge. However, to be on the safe side, I
2740 have made the code more robust (and fixed the comments that describe what
2743 53. Now that there can be additional text after "Completed" in log lines (if
2744 the queue_time_overall log selector is set), a one-byte patch to exigrep
2745 was needed to allow it to recognize "Completed" as not the last thing in
2748 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2749 patch that reportedly fixes this has been added. I am not expert enough to
2750 create a test for it. This is what the patch creator wrote:
2752 "I found a little strange behaviour of ldap code when working with
2753 Windows 2003 AD Domain, where users was placed in more than one
2754 Organization Units. When I tried to give exim partial DN, the exit code
2755 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2756 But simultaneously result of request was absolutely normal ldap result,
2757 so I produce this patch..."
2759 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2760 REFERENCE, so I have modified the code to exclude the patch when that macro
2763 55. Some experimental protocols are using DNS PTR records for new purposes. The
2764 keys for these records are domain names, not reversed IP addresses. The
2765 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2766 leaves it alone. Component reversal etc. now happens only for IP addresses.
2769 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2771 57. Double the size of the debug message buffer (to 2048) so that more of very
2772 long debug lines gets shown.
2774 58. The exicyclog utility now does better if the number of log files to keep
2775 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2777 59. Two changes related to the smtp_active_hostname option:
2779 (1) $smtp_active_hostname is now available as a variable.
2780 (2) The default for smtp_banner uses $smtp_active_hostname instead
2781 of $primary_hostname.
2783 60. The host_aton() function is supposed to be passed a string that is known
2784 to be a valid IP address. However, in the case of IPv6 addresses, it was
2785 not checking this. This is a hostage to fortune. Exim now panics and dies
2786 if the condition is not met. A case was found where this could be provoked
2787 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2788 components; fortuitously, this particular loophole had already been fixed
2789 by change 4.50/55 above.
2791 If there are any other similar loopholes, the new check in host_aton()
2792 itself should stop them being exploited. The report I received stated that
2793 data on the command line could provoke the exploit when Exim was running as
2794 exim, but did not say which command line option was involved. All I could
2795 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2796 running as the user.
2799 61. There was a buffer overflow vulnerability in the SPA authentication code
2800 (which came originally from the Samba project). I have added a test to the
2801 spa_base64_to_bits() function which I hope fixes it.
2804 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2805 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2807 63. The daemon start-up calls getloadavg() while still root for those OS that
2808 need the first call to be done as root, but it missed one case: when
2809 deliver_queue_load_max is set with deliver_drop_privilege. This is
2810 necessary for the benefit of the queue runner, because there is no re-exec
2811 when deliver_drop_privilege is set.
2813 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2814 This has been fixed.
2816 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2817 was in use, was not putting the data itself into the right store pool;
2818 consequently, it could be overwritten for a subsequent message in the same
2819 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2822 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2824 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2825 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2826 the function were treating the return as a boolean value, which happened to
2827 work because 0=false and not-0=true, but is not correct code.
2829 68. The host_aton() function was not handling scoped IPv6 addresses (those
2830 with, for example, "%eth0" on the end) correctly.
2832 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2833 negated items (that is, ~something) in unsigned ints. Some compilers
2834 apparently mutter when there is no cast.
2836 70. If an address verification called from an ACL failed, and did not produce a
2837 user-specific message (i.e. there was only a "system" message), nothing was
2838 put in $acl_verify_message. In this situation, it now puts the system
2841 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2842 session; change 4.31/43 added the unwanted input to the log line - except
2843 that it did not do this in the start of session case. It now does.
2845 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2846 This is wrong and can cause the other end to generate a synchronization
2847 error if it is another Exim or anything else that does the synchronization
2848 check. A QUIT command is no longer sent after a timeout.
2850 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2851 during host lookups.
2853 74. The defer_ok option of callout verification was not working if it was used
2854 when verifying addresses in header lines, that is, for this case:
2856 verify = header_sender/callout=defer_ok
2858 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2859 those file descriptors could be used for SMTP connections. If anything
2860 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2861 could be sent to the SMTP client, causing chaos. The daemon now opens
2862 stdin, stdout, and stderr to /dev/null when it puts itself into the
2865 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2866 log by default. The user can override this with suitable Perl magic.
2868 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2869 the log message when discard triggers, was not working for the DATA ACL or
2870 for the non-SMTP ACL.
2872 78. Error message wording change in sieve.c.
2874 79. If smtp_accept_max_per_host was set, the number of connections could be
2875 restricted to fewer than expected, because the daemon was trying to set up
2876 a new connection before checking whether the processes handling previous
2877 connections had finished. The check for completed processes is now done
2878 earlier. On busy systems, this bug wouldn't be noticed because something
2879 else would have woken the daemon, and it would have reaped the completed
2882 80. If a message was submitted locally by a user whose login name contained one
2883 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2884 It caused a spool format error. I have fixed the spool reading code. A
2885 related problem was that the "from" clause in the Received: line became
2886 illegal because of the space(s). It is now covered by ${quote_local_part.
2888 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2891 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2893 83. Patch from Sieve maintainer to fix unterminated string problem in
2894 "vacation" handling.
2896 84. Some minor changes to the Linux configuration files to help with other
2897 OS variants using glibc.
2899 85. One more patch for Sieve to update vacation handling to latest spec.
2902 ----------------------------------------------------
2903 See the note above about the 4.44 and 4.50 releases.
2904 ----------------------------------------------------
2910 1. Change 4.43/35 introduced a bug that caused file counts to be
2911 incorrectly computed when quota_filecount was set in an appendfile
2914 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2915 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2918 3. Give more explanation in the error message when the command for a transport
2919 filter fails to execute.
2921 4. There are several places where Exim runs a non-Exim command in a
2922 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2923 was being done only for the command run by the queryprogram router. It is
2924 now done for all such subprocesses. The other cases are: ${run, transport
2925 filters, and the commands run by the lmtp and pipe transports.
2927 5. Some older OS have a limit of 256 on the maximum number of file
2928 descriptors. Exim was using setrlimit() to set 1000 as a large value
2929 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2930 systems. I've change it so that if it can't get 1000, it tries for 256.
2932 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2933 was an oversight, and furthermore, ever since the addition of extra
2934 controls (e.g. 4.43/32), the checks on when to allow different forms of
2935 "control" were broken. There should now be diagnostics for all cases when a
2936 control that does not make sense is encountered.
2938 7. $recipients is now available in the predata ACL (oversight).
2940 8. Tidy the search cache before the fork to do a delivery from a message
2941 received from the command line. Otherwise the child will trigger a lookup
2942 failure and thereby defer the delivery if it tries to use (for example) a
2943 cached ldap connection that the parent has called unbind on.
2945 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2946 of $address_data from the recipient verification was clobbered by the
2947 sender verification.
2949 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2950 was its contents. (It was OK if the option was not defined at all.)
2952 11. A "Completed" log line is now written for messages that are removed from
2953 the spool by the -Mrm option.
2955 12. $host_address is now set to the target address during the checking of
2956 ignore_target_hosts.
2958 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2959 being passed; this would have caused $sender_host_name to have been used if
2960 matching the list had actually called for a host name (not very likely,
2961 since this list is usually IP addresses). A host name is now passed as
2964 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2965 code that specifies a non-restarting handler (typically sigaction() in
2966 modern systems) in an attempt to fix a rare and obscure crash bug.
2968 15. Narrowed the window for a race in the daemon that could cause it to ignore
2969 SIGCHLD signals. This is not a major problem, because they are used only to
2970 wake it up if nothing else does.
2972 16. A malformed maildirsize file could cause Exim to calculate negative values
2973 for the mailbox size or file count. Odd effects could occur as a result.
2974 The maildirsize information is now recalculated if the size or filecount
2977 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2978 support for a long time. Removed HAVE_SYS_VFS_H.
2980 18. Updated exipick to current release from John Jetmore.
2982 19. Allow an empty sender to be matched against a lookup in an address list.
2983 Previously the only cases considered were a regular expression, or an
2986 20. Exim went into a mad DNS lookup loop when doing a callout where the
2987 host was specified on the transport, if the DNS lookup yielded more than
2990 21. The RFC2047 encoding function was originally intended for short strings
2991 such as real names; it was not keeping to the 75-character limit for
2992 encoded words that the RFC imposes. It now respects the limit, and
2993 generates multiple encoded words if necessary. To be on the safe side, I
2994 have increased the buffer size for the ${rfc2047: expansion operator from
2997 22. Failure to deliver a bounce message always caused it to be frozen, even if
2998 there was an errors_to setting on the router. The errors_to setting is now
3001 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3002 canonical form (fully expanded) before being placed in
3003 $sender_host_address.
3005 24. Updated eximstats to version 1.33
3007 25. Include certificate and key file names in error message when GnuTLS fails
3008 to set them up, because the GnuTLS error message doesn't include the name
3009 of the failing file when there is a problem reading it.
3011 26. Expand error message when OpenSSL has problems setting up cert/key files.
3014 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3015 (this can affect the format of dates).
3017 28. exim_tidydb, when checking for the continued existence of a message for
3018 which it has found a message-specific retry record, was not finding
3019 messages that were in split spool directories. Consequently, it was
3020 deleting retry records that should have stayed in existence.
3022 29. eximstats updated to version 1.35
3023 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3024 1.35 - bugfix such that pie charts by volume are generated correctly
3026 30. The SPA authentication driver was not abandoning authentication and moving
3027 on to the next authenticator when an expansion was forced to fail,
3028 contradicting the general specification for all authenticators. Instead it
3029 was generating a temporary error. It now behaves as specified.
3031 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3032 (the order specifies the preference for clients). The order is now AES256,
3033 AES128, 3DES, ARCFOUR128.
3035 31. Small patch to Sieve code - explicitly set From: when generating an
3038 32. Exim crashed if a remote delivery caused a very long error message to be
3039 recorded - for instance if somebody sent an entire SpamAssassin report back
3040 as a large number of 550 error lines. This bug was coincidentally fixed by
3041 increasing the size of one of Exim's internal buffers (big_buffer) that
3042 happened as part of the Exiscan merge. However, to be on the safe side, I
3043 have made the code more robust (and fixed the comments that describe what
3046 33. Some experimental protocols are using DNS PTR records for new purposes. The
3047 keys for these records are domain names, not reversed IP addresses. The
3048 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3049 leaves it alone. Component reversal etc. now happens only for IP addresses.
3052 34. The host_aton() function is supposed to be passed a string that is known
3053 to be a valid IP address. However, in the case of IPv6 addresses, it was
3054 not checking this. This is a hostage to fortune. Exim now panics and dies
3055 if the condition is not met. A case was found where this could be provoked
3056 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3057 components; fortuitously, this particular loophole had already been fixed
3058 by change 4.50/55 or 4.44/33 above.
3060 If there are any other similar loopholes, the new check in host_aton()
3061 itself should stop them being exploited. The report I received stated that
3062 data on the command line could provoke the exploit when Exim was running as
3063 exim, but did not say which command line option was involved. All I could
3064 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3065 running as the user.
3068 35. There was a buffer overflow vulnerability in the SPA authentication code
3069 (which came originally from the Samba project). I have added a test to the
3070 spa_base64_to_bits() function which I hope fixes it.
3073 36. The daemon start-up calls getloadavg() while still root for those OS that
3074 need the first call to be done as root, but it missed one case: when
3075 deliver_queue_load_max is set with deliver_drop_privilege. This is
3076 necessary for the benefit of the queue runner, because there is no re-exec
3077 when deliver_drop_privilege is set.
3079 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3080 was in use, was not putting the data itself into the right store pool;
3081 consequently, it could be overwritten for a subsequent message in the same
3082 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3085 38. Sometimes the final signoff response after QUIT could fail to get
3086 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3087 < 0 before doing a fflush(). This bug looks as though it goes back to the
3088 introduction of TLS in release 3.20, but "sometimes" must have been rare
3089 because the tests only now provoked it.
3095 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3096 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3097 Now it returns an integer. A number of calls were still expecting a T/F
3098 return. Fortuitously, in all cases, the tests worked in OK situations,
3099 which is the norm. However, things would have gone wrong on any write
3100 failures on the smtp file descriptor. This function is used when sending
3101 messages over SMTP and also when doing verify callouts.
3103 2. When Exim is called to do synchronous delivery of a locally submitted
3104 message (the -odf or -odi options), it no longer closes stderr before doing
3107 3. Implemented the mua_wrapper option.
3109 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3111 5. Implemented the functions header_remove(), header_testname(),
3112 header_add_at_position(), and receive_remove_recipient(), and exported them
3115 6. If an ACL "warn" statement specified the addition of headers, Exim already
3116 inserted X-ACL-Warn: at the start if there was no header name. However, it
3117 was not making this test for the second and subsequent header lines if
3118 there were newlines in the string. This meant that an invalid header could
3119 be inserted if Exim was badly configured.
3121 7. Allow an ACL "warn" statement to add header lines at the start or after all
3122 the Received: headers, as well as at the end.
3124 8. Added the rcpt_4xx retry error code.
3126 9. Added postmaster_mailfrom=xxx to callout verification option.
3128 10. Added mailfrom=xxxx to the callout verification option, for verify=
3131 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3132 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3134 12. Inserted some casts to stop certain compilers warning when using pointer
3135 differences as field lengths or precisions in printf-type calls (mostly
3136 affecting debugging statements).
3138 13. Added optional readline() support for -be (dynamically loaded).
3140 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3141 same clock tick as a message's arrival, so that its received time was the
3142 same as the "first fail" time on the retry record, and that message
3143 remained on the queue past the ultimate address timeout, every queue runner
3144 would try a delivery (because it was past the ultimate address timeout) but
3145 after another failure, the ultimate address timeout, which should have then
3146 bounced the address, did not kick in. This was a "< instead of <=" error;
3147 in most cases the first failure would have been in the next clock tick
3148 after the received time, and all would be well.
3150 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3151 being recognized when the domain list was tested by the match_domain
3152 condition in an expansion string.
3154 16. Added the ${str2b64: operator.
3156 17. Exim was always calling setrlimit() to set a large limit for the number of
3157 processes, without checking whether the existing limit was already
3158 adequate. (It did check for the limit on file descriptors.) Furthermore,
3159 errors from getrlimit() and setrlimit() were being ignored. Now they are
3160 logged to the main and panic logs, but Exim does carry on, to try to do its
3161 job under whatever limits there are.
3163 18. Imported PCRE 5.0.
3165 19. Trivial typo in log message " temporarily refused connection" (the leading
3168 20. If the log selector return_path_on_delivery was set and an address was
3169 redirected to /dev/null, the delivery process crashed because it assumed
3170 that a return path would always be set for a "successful" delivery. In this
3171 case, the whole delivery is bypassed as an optimization, and therefore no
3174 21. Internal re-arrangement: the function for sending a challenge and reading
3175 a response while authentication was assuming a zero-terminated challenge
3176 string. It's now changed to take a pointer and a length, to allow for
3177 binary data in such strings.
3179 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3181 23. Exim was not respecting finduser_retries when seeking the login of the
3182 uid under which it was called; it was always trying 10 times. (The default
3183 setting of finduser_retries is zero.) Also, it was sleeping after the final
3184 failure, which is pointless.
3186 24. Implemented tls_on_connect_ports.
3188 25. Implemented acl_smtp_predata.
3190 26. If the domain in control=submission is set empty, Exim assumes that the
3191 authenticated id is a complete email address when it generates From: or
3192 Sender: header lines.
3194 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3195 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3196 chown and chgrp in /bin and hostname in /usr/bin.
3198 28. Exim was keeping the "process log" file open after each use, just as it
3199 does for the main log. This opens the possibility of it remaining open for
3200 long periods when the USR1 signal hits a daemon. Occasional processlog
3201 errors were reported, that could have been caused by this. Anyway, it seems
3202 much more sensible not to leave this file open at all, so that is what now
3205 29. The long-running daemon process does not normally write to the log once it
3206 has entered its main loop, and it closes the log before doing so. This is
3207 so that log files can straightforwardly be renamed and moved. However,
3208 there are a couple of unusual error situations where the daemon does write
3209 log entries, and I had neglected to close the log afterwards.
3211 30. The text of an SMTP error response that was received during a remote
3212 delivery was being truncated at 512 bytes. This is too short for some of
3213 the long messages that one sometimes sees. I've increased the limit to
3216 31. It is now possible to make retry rules that apply only when a message has a
3217 specific sender, in particular, an empty sender.
3219 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3220 it possible to be selective about when SMTP synchronization is enforced.
3222 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3224 32. Implemented hosts_connection_nolog.
3226 33. Added an ACL for QUIT.
3228 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3231 35. Added mailbox_size and mailbox_filecount to appendfile.
3233 36. Added control = no_multiline_responses to ACLs.
3235 37. There was a bug in the logic of the code that waits for the clock to tick
3236 in the case where the clock went backwards by a substantial amount such
3237 that the microsecond fraction of "now" was more than the microsecond
3238 fraction of "then" (but the whole seconds number was less).
3240 38. Added support for the libradius Radius client library this is found on
3241 FreeBSD (previously only the radiusclient library was supported).
3247 1. When certain lookups returned multiple values in the form name=value, the
3248 quoting of the values was not always being done properly. Specifically:
3249 (a) If the value started with a double quote, but contained no whitespace,
3251 (b) If the value contained whitespace other than a space character (i.e.
3252 tabs or newlines or carriage returns) it was not quoted.
3253 This fix has been applied to the mysql and pgsql lookups by writing a
3254 separate quoting function and calling it from the lookup code. The fix
3255 should probably also be applied to nisplus, ibase and oracle lookups, but
3256 since I cannot test any of those, I have not disturbed their existing code.
3258 2. A hit in the callout cache for a specific address caused a log line with no
3259 reason for rejecting RCPT. Now it says "Previous (cached) callout
3260 verification failure".
3262 3. There was an off-by-one bug in the queryprogram router. An over-long
3263 return line was truncated at 256 instead of 255 characters, thereby
3264 overflowing its buffer with the terminating zero. As well as fixing this, I
3265 have increased the buffer size to 1024 (and made a note to document this).
3267 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3268 when Exim is waiting for an SMTP response from a remote server, Exim
3269 restarts its select() call on the socket, thereby resetting its timeout.
3270 This is not a problem when such interrupts are rare. Somebody set up a cron
3271 job to run exiwhat every 2 minutes, which is less than the normal select()
3272 timeout (5 or 10 minutes). This meant that the select() timeout never
3273 kicked in because it was always reset. I have fixed this by comparing the
3274 time when an interrupt arrives with the time at the start of the first call
3275 to select(). If more time than the timeout has elapsed, the interrupt is
3276 treated as a timeout.
3278 5. Some internal re-factoring in preparation for the addition of Sieve
3279 extensions (by MH). In particular, the "personal" test is moved to a
3280 separate function, and given an option for scanning Cc: and Bcc: (which is
3281 not set for Exim filters).
3283 6. When Exim created an email address using the login of the caller as the
3284 local part (e.g. when creating a From: or Sender: header line), it was not
3285 quoting the local part when it contained special characters such as @.
3287 7. Installed new OpenBSD configuration files.
3289 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3290 try to make them clearer.
3292 9. Callout options, other than the timeout value, were being ignored when
3293 verifying sender addresses in header lines. For example, when using
3295 verify = header_sender/callout=no_cache
3297 the cache was (incorrectly) being used.
3299 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3300 only the Cygwin environment.
3302 11. When return_path_on_delivery was set as a log selector, if different remote
3303 addresses in the same message used different return paths and parallel
3304 remote delivery occurred, the wrong values would sometimes be logged.
3305 (Whenever a remote delivery process finished, the return path value from
3306 the most recently started remote delivery process was logged.)
3308 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3309 lines when AUTH and/or TLS are in use. This is the "received protocol"
3310 field. Exim used to use "asmtp" for authenticated SMTP, without any
3311 indication (in the protocol name) for TLS use. Now it follows the RFC and
3312 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3313 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3314 names appear in log lines as well as in Received: header lines.
3316 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3317 extensions, and comparison tests, and to fix some bugs.
3319 14. Changes to the "personal" filter test:
3321 (1) The test was buggy in that it was just doing the equivalent of
3322 "contains" tests on header lines. For example, if a user's address was
3323 anne@some.where, the "personal" test would incorrectly be true for
3325 To: susanne@some.where
3327 This test is now done by extracting each address from the header in turn,
3328 and checking the entire address. Other tests that are part of "personal"
3329 are now done using regular expressions (for example, to check local parts
3330 of addresses in From: header lines).
3332 (2) The list of non-personal local parts in From: addresses has been
3333 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3334 taken from the Sieve specification recommendations.
3336 (3) If the message contains any header line starting with "List-" it is
3337 treated as non-personal.
3339 (4) The test for "circular" in the Subject: header line has been removed
3340 because it now seems ill-conceived.
3342 15. Minor typos in src/EDITME comments corrected.
3344 16. Installed latest exipick from John Jetmore.
3346 17. If headers_add on a router specified a text string that was too long for
3347 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3348 of string_sprintf() is now avoided.
3350 18. $message_body_size was not set (it was always zero) when running the DATA
3351 ACL and the local_scan() function.
3353 19. For the "mail" command in an Exim filter, no default was being set for
3354 the once_repeat time, causing a random time value to be used if "once" was
3355 specified. (If the value happened to be <= 0, no repeat happened.) The
3356 default is now 0s, meaning "never repeat". The "vacation" command was OK
3357 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3358 (I found it when inspecting the code).
3360 20. There is now an overall timeout for performing a callout verification. It
3361 defaults to 4 times the callout timeout, which applies to individual SMTP
3362 commands during the callout. The overall timeout applies when there is more
3363 than one host that can be tried. The timeout is checked before trying the
3364 next host. This prevents very long delays if there are a large number of
3365 hosts and all are timing out (e.g. when the network connections are timing
3366 out). The value of the overall timeout can be changed by specifying an
3367 additional sub-option for "callout", called "maxwait". For example:
3369 verify = sender/callout=5s,maxwait=20s
3371 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3372 to the end before writing, but this should make it even safer).
3374 22. Exim was forgetting that it had advertised PIPELINING for the second and
3375 subsequent messages on an SMTP connection. It was also not resetting its
3376 memory on STARTTLS and an internal HELO.
3378 23. When Exim logs an SMTP synchronization error within a session, it now
3379 records whether PIPELINING has been advertised or not.
3381 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3382 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3383 rather than long int.
3385 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3387 26. Added the never_mail option to autoreply.
3393 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3394 crash if the getsockname() call failed; this can happen if a connection is
3395 closed very soon after it is established. The problem was simply in the
3396 order in which certain operations were done, causing Exim to try to write
3397 to the SMTP stream before it had set up the file descriptor. The bug has
3398 been fixed by making things happen in the correct order.
3404 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3405 before the connection was closed, thus losing the rejection response.
3407 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3408 some early Solaris releases, but causes trouble in current releases where
3409 socklen_t is defined.
3411 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3414 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3417 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3418 that releasing the top of it at the end releases what was used for sub-
3419 expansions (unless the block got too big). However, discard this block if
3420 the first thing is a variable or header, so that we can use its block when
3421 it is dynamic (useful for very large $message_headers, for example).
3423 6. Lookups now cache *every* query, not just the most recent. A new, separate
3424 store pool is used for this. It can be recovered when all lookup caches are
3425 flushed. Lookups now release memory at the end of their result strings.
3426 This has involved some general refactoring of the lookup sources.
3428 7. Some code has been added to the store_xxx() functions to reduce the amount
3429 of flapping under certain conditions.
3431 8. log_incoming_interface used to affect only the <= reception log lines. Now
3432 it causes the local interface and port to be added to several more SMTP log
3433 lines, for example "SMTP connection from", and rejection lines.
3435 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3437 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3439 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3440 could be overwritten at the end of the current message (or the start of a
3441 new message if it was set in a HELO ACL). The value is now preserved for
3442 the duration of the SMTP connection.
3444 12. If a transport had a headers_rewrite setting, and a matching header line
3445 contained an unqualified address, that address was qualified, even if it
3446 did not match any rewriting rules. The underlying bug was that the values
3447 of the flags that permit the existence of unqualified sender and recipient
3448 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3449 non-local messages, and by -bnq for local messages) were not being
3450 preserved with the message after it was received.
3452 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3453 "next input=" as part of the text comprising the host identity instead of
3454 the correct text. The code was using the same buffer for two different
3455 strings. However, depending on which order the printing function evaluated
3456 its arguments, the bug did not always show up. Under Linux, for example, my
3457 test suite worked just fine.
3459 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3460 doesn't work with some older versions of Perl. It has been changed to "my",
3461 which in any case is probably the better facility to use.
3463 15. A really picky compiler found some instances of statements for creating
3464 error messages that either had too many or two few arguments for the format
3467 16. The size of the buffer for calls to the DNS resolver has been increased
3468 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3469 for addresses that have a lot of PTR records. This alleviates a problem; it
3470 does not fully solve it.
3472 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3473 buffer now truncates the list and logs the incident, which is the same
3474 action as happens when Exim is looking up a host name and its aliases.
3475 Previously in this situation something unpredictable would happen;
3476 sometimes it was "internal error: store_reset failed".
3478 18. If a server dropped the connection unexpectedly when an Exim client was
3479 using GnuTLS and trying to read a response, the client delivery process
3480 crashed while trying to generate an error log message.
3482 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3483 string, for example:
3485 warn message = H1: something\nH2: something
3487 the text was added as a single header line from Exim's point of view
3488 though it ended up OK in the delivered message. However, searching for the
3489 second and subsequent header lines using $h_h2: did not work. This has been
3490 fixed. Similarly, if a system filter added multiple headers in this way,
3491 the routers could not see them.
3493 20. Expanded the error message when iplsearch is called with an invalid key to
3494 suggest using net-iplsearch in a host list.
3496 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3497 ACLs are no longer actually imposed (and a message to that effect is
3500 22. If a "gecos" field in a passwd entry contained escaped characters, in
3501 particular, if it contained a \" sequence, Exim got it wrong when building
3502 a From: or a Sender: header from that name. A second bug also caused
3503 incorrect handling when an unquoted " was present following a character
3504 that needed quoting.
3506 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3507 was not being matched caselessly.
3509 24. Arranged for all hyphens in the exim.8 source to be escaped with
3512 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3513 properly. Recipient callout cache records were still being keyed to include
3514 the sender, even when use_sender was set false. This led to far more
3515 callouts that were necessary. The sender is no longer included in the key
3516 when use_sender is false.
3518 26. Added "control = submission" modifier to ACLs.
3520 27. Added the ${base62d: operator to decode base 62 numbers.
3522 28. dnsdb lookups can now access SRV records.
3524 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3525 the configuration file.
3527 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3528 (-v) mode. This makes the output for a verbose queue run more intelligible.
3530 31. Added a use_postmaster feature to recipient callouts.
3532 32. Added the $body_zerocount variable, containing the number of binary zero
3533 bytes in the message body.
3535 33. The time of last modification of the "new" subdirectory is now used as the
3536 "mailbox time last read" when there is a quota error for a maildir
3539 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3541 35. Added +ignore_unknown as a special item in host lists.
3543 36. Code for decoding IPv6 addresses in host lists is now included, even if
3544 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3545 address was recognized as an IP address, but was then not correctly decoded
3546 into binary, causing unexpected and incorrect effects when compared with
3553 1. Very minor rewording of debugging text in manualroute to say "list of
3554 hosts" instead of "hostlist".
3556 2. If verify=header_syntax was set, and a header line with an unqualified
3557 address (no domain) and a large number of spaces between the end of the
3558 name and the colon was received, the reception process suffered a buffer
3559 overflow, and (when I tested it) crashed. This was caused by some obsolete
3560 code that should have been removed. The fix is to remove it!
3562 3. When running in the test harness, delay a bit after writing a bounce
3563 message to get a bit more predictability in the log output.
3565 4. Added a call to search_tidyup() just before forking a reception process. In
3566 theory, someone could use a lookup in the expansion of smtp_accept_max_
3567 per_host which, without the tidyup, could leave open a database connection.
3569 5. Added the variables $recipient_data and $sender_data which get set from a
3570 lookup success in an ACL "recipients" or "senders" condition, or a router
3571 "senders" option, similar to $domain_data and $local_part_data.
3573 6. Moved the writing of debug_print from before to after the "senders" test
3576 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3577 problems for message scanning, either using a data ACL, or using
3578 local_scan() because the Received: header was not generated till after they
3579 were called (in order to set the time as the time of reception completion).
3580 I have revised the way this works. The header is now generated after the
3581 body is received, but before the ACL or local_scan() are called. After they
3582 are run, the timestamp in the header is updated.
3588 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3589 before starting a queue runner without re-exec. This happened only when
3590 deliver_drop_privilege was set or when the Exim user was set to root. The
3591 effect of the bug was that timeouts during subsequent deliveries caused
3592 crashes instead of being properly handled. The handler is now left at its
3593 default (and expected) setting.
3595 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3596 message, again when deliver_drop_privilege is set or Exim is run as root.
3597 The bug described in (1) was not present in this case, but the tidying up
3598 of the other signals was missing. I have made the two cases consistent.
3600 3. The ignore_target_hosts setting on a manualroute router was being ignored
3601 for hosts that were looked up using the /MX notation.
3603 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3606 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3607 operated on the sender address. After changing the $sender_address to <>
3608 for the sender address verify, Exim was re-instated it as the original
3609 (before rewriting) address, but remembering that it had rewritten it, so it
3610 wasn't rewriting it again. This bug also had the effect of breaking the
3611 sender address verification caching when the sender address was rewritten.
3613 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3614 This has been changed so that if the ip literal address matches
3615 ignore_target_hosts, the router declines.
3617 7. Added expansion conditions match_domain, match_address, and match_local_
3618 part (NOT match_host).
3620 8. The placeholder for the Received: header didn't have a length field set.
3622 9. Added code to Exim itself and to exim_lock to test for a specific race
3623 condition that could lead to file corruption when using MBX delivery. The
3624 issue is with the lockfile that is created in /tmp. If this file is removed
3625 after a process has opened it but before that process has acquired a lock,
3626 there is the potential for a second process to recreate the file and also
3627 acquire a lock. This could lead to two Exim processes writing to the file
3628 at the same time. The added code performs the same test as UW imapd; it
3629 checks after acquiring the lock that its file descriptor still refers to
3630 the same named file.
3632 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3633 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3636 11. Added the smtp_active_hostname option. If used, this will typically be made
3637 to depend on the incoming interface address. Because $interface_address is
3638 not set up until the daemon has forked a reception process, error responses
3639 that can happen earlier (such as "too many connections") no longer contain
3642 12. If an expansion in a condition on a "warn" statement fails because a lookup
3643 defers, the "warn" statement is abandoned, and the next ACL statement is
3644 processed. Previously this caused the whole ACL to be aborted.
3646 13. Added the iplsearch lookup type.
3648 14. Added ident_timeout as a log selector.
3650 15. Added tls_certificate_verified as a log selector.
3652 16. Added a global option tls_require_ciphers (compare the smtp transport
3653 option of the same name). This controls incoming TLS connections.
3655 17. I finally figured out how to make tls_require_ciphers do a similar thing
3656 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3657 before starting the TLS session.
3659 18. Tabs are now shown as \t in -bP output.
3661 19. If the log selector return_path_on_delivery was set, Exim crashed when
3662 bouncing a message because it had too many Received: header lines.
3664 20. If two routers both had headers_remove settings, and the first one included
3665 a superfluous trailing colon, the final name in the first list and the
3666 first name in the second list were incorrectly joined into one item (with a
3667 colon in the middle).
3673 1. Added -C and -D options to the exinext utility, mainly to make it easier
3674 to include in the automated testing, but these could be helpful when
3675 multiple configurations are in use.
3677 2. The exinext utility was not formatting the output nicely when there was
3678 an alternate port involved in the retry record key, nor when there was a
3679 message id as well (for retries that were specific to a specific message
3680 and a specific host). It was also confused by IPv6 addresses, because of
3681 the additional colons they contain. I have fixed the IPv4 problem, and
3682 patched it up to do a reasonable job for IPv6.
3684 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3685 delivery, the log line now contains "pipelined" if PIPELINING was used.
3687 4. An SMTP transport process used to panic and die if the bind() call to set
3688 an explicit outgoing interface failed. This has been changed; it is now
3689 treated in the same way as a connect() failure.
3691 5. A reference to $sender_host_name in the part of a conditional expansion
3692 that was being skipped was still causing a DNS lookup. This no longer
3695 6. The def: expansion condition was not recognizing references to header lines
3696 that used bh_ and bheader_.
3698 7. Added the _cache feature to named lists.
3700 8. The code for checking quota_filecount in the appendfile transport was
3701 allowing one more file than it should have been.
3703 9. For compatibility with Sendmail, the command line option
3711 and sets the incoming protocol and host name (for trusted callers). The
3712 host name and its colon can be omitted when only the protocol is to be set.
3713 Note the Exim already has two private options, -pd and -ps, that refer to
3714 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3715 "s", but I don't think that's a major issue.
3717 10. A number of refactoring changes to the code, none of which should affect
3720 (a) The number of logging options was getting close to filling up the
3721 32-bit word that was used as a bit map. I have split them into two classes:
3722 those that are passed in the argument to log_write(), and those that are
3723 only ever tested independently outside of that function. These are now in
3724 separate 32-bit words, so there is plenty of room for expansion again.
3725 There is no change in the user interface or the logging behaviour.
3727 (b) When building, for example, log lines, the code previously used a
3728 macro that called string_cat() twice, in order to add two strings. This is
3729 not really sufficiently general. Furthermore, there was one instance where
3730 it was actually wrong because one of the argument was used twice, and in
3731 one call a function was used. (As it happened, calling the function twice
3732 did not affect the overall behaviour.) The macro has been replaced by a
3733 function that can join an arbitrary number of extra strings onto a growing
3736 (c) The code for expansion conditions now uses a table and a binary chop
3737 instead of a serial search (which was left over from when there were very
3738 few conditions). Also, it now recognizes conditions like "pam" even when
3739 the relevant support is not compiled in: a suitably worded error message is
3740 given if an attempt is made to use such a condition.
3742 11. Added ${time_interval:xxxxx}.
3744 12. A bug was causing one of the ddress fields not to be passed back correctly
3745 from remote delivery subprocesses. The field in question was not being
3746 subsequently used, so this caused to problems in practice.
3748 13. Added new log selectors queue_time and deliver_time.
3750 14. Might have fixed a bug in maildirsizefile handling that threw up
3751 "unexpected character" debug warnings, and recalculated the data
3752 unnecessarily. In any case, I expanded the warning message to give more
3755 15. Added the message "Restricted characters in address" to the statements in
3756 the default ACL that block characters like @ and % in local parts.
3758 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3759 Three changes have been made:
3761 (a) There was a serious bug; a negative response to MAIL caused the whole
3762 recipient domain to be cached as invalid, thereby blocking all messages
3763 to all local parts at the same domain, from all senders. This bug has
3764 been fixed. The domain is no longer cached after a negative response to
3765 MAIL if the sender used is not empty.
3767 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3770 (c) A new callout option, "use_sender" has been added for people who want
3771 the modified behaviour.
3777 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3780 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3781 indeed breaks things for older releases.
3783 3. Added additional logging to the case where there is a problem reading data
3784 from a filter that is running in a subprocess using a pipe, in order to
3785 try to track down a specific problem.
3787 4. Testing facility fudge: when running in the test harness and attempting
3788 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3789 getting "No route to host". Convert this to a timeout.
3791 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3794 6. Some OS don't have socklen_t but use size_t instead. This affects the
3795 fifth argument of getsockopt() amongst other things. This is now
3796 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3797 can be set for individual OS. I have set it for SunOS5, OSF1, and
3798 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3799 some earlier ones do not.
3801 7. Change 4.30/15 was not doing the test caselessly.
3803 8. The standard form for an IPv6 address literal was being rejected by address
3804 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3805 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3806 this, as well as the form without the "IPv6" on the front (but only when
3807 address literals are enabled, of course).
3809 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3811 10. Exim crashed if a message with an empty sender address specified by -f
3812 encountered a router with an errors_to setting. This could be provoked only
3813 by a command such as
3817 where an empty string was supplied; "<>" did not hit this bug.
3819 11. Installed PCRE release 4.5.
3821 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3822 remained set. It is now erased.
3824 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3825 times from message ids (which are base 36 rather than the normal 62).
3827 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3828 were being counted as actual protocol errors, and logged if the log
3829 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3830 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3831 and DATA following a set of rejected RCPTs do not count as protocol errors.
3832 In other words, Exim assumes they were pipelined, though this may not
3833 actually be the case. Of course, in all cases the client gets an
3834 appropriate error code.
3836 15. If a lookup fails in an ACL condition, a message about the failure may
3837 be available; it is used if testing the ACL cannot continue, because most
3838 such messages specify what the cause of the deferral is. However, some
3839 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3840 that caused an old message to be retained and used if a later statement
3841 caused a defer, replacing the real cause of the deferral.
3843 16. If an IP address had so many PTR records that the DNS lookup buffer
3844 was not large enough to hold them, Exim could crash while trying to process
3845 the truncated data. It now detects and logs this case.
3847 17. Further to 4.21/58, another change has been made: if (and only if) the
3848 first line of a message (the first header line) ends with CRLF, a bare LF
3849 in a subsequent header line has a space inserted after it, so as not to
3850 terminate the header.
3852 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3853 unnecessarily, used atoi() instead of strtol(), and didn't check the
3854 termination when getting file sizes from file names by regex.
3856 19. Completely re-implemented the support for maildirsize files, in the light
3857 of a number of problems with the previous contributed implementation
3858 (4.30/29). In particular:
3860 . If the quota is zero, the maildirsize file is maintained, but no quota is
3863 . If the maildir directory does not exist, it is created before any attempt
3864 to write a maildirsize file.
3866 . The quota value in the file is just a cache; if the quota is changed in
3867 the transport, the new value overrides.
3869 . A regular expression is available for excluding directories from the
3872 20. The autoreply transport checks the characters in options that define the
3873 message's headers; it allows continued headers, but it was checking with
3874 isspace() after an embedded newline instead of explicitly looking for a
3877 21. If all the "regular" hosts to which an address was routed had passed their
3878 expiry times, and had not reached their retry times, the address was
3879 bounced, even if fallback hosts were defined. Now Exim should go on to try
3882 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3883 equivalent code in the SMTP transport. Some hosts send humungous responses
3884 to HELO/EHLO, more than 1024 it seems.
3886 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3887 gives compiler warnings in some environments. I've now done it "properly",
3890 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3891 (because of problems with the built-in one) was declared to return uschar *
3892 instead of char *, causing compiler failure.
3894 25. Fixed a file descriptor leak when processing alias/forward files.
3896 26. Fixed a minor format string issue in dbfn.c.
3898 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3900 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3901 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3904 29. When a sender address is verified, it is cached, to save repeating the test
3905 when there is more than one recipient in a message. However, when the
3906 verification involves a callout, it is possible for different callout
3907 options to be set for different recipients. It is too complicated to keep
3908 track of this in the cache, so now Exim always runs a verification when a
3909 callout is required, relying on the callout cache for the optimization.
3910 The overhead is duplication of the address routing, but this should not be
3913 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3914 to be verified with callout=postmaster, and the main callout worked but the
3915 postmaster check failed, the verification correctly failed. However, if a
3916 subsequent RCPT command asked for sender verification *without* the
3917 postmaster check, incorrect caching caused this verification also to fail,
3920 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3921 it was not caching the DNS options (qualify_single, search_parents) that
3922 were used when the lookup failed. A subsequent lookup with different
3923 options therefore always gave the same answer, though there were cases
3924 where it should not have. (Example: a "domains = !$mx_any" option on a
3925 dnslookup router: the "domains" option is always processed without any
3926 widening, but the router might have qualify_single set.) Now Exim uses the
3927 cached value only when the same options are set.
3929 32. Added John Jetmore's "exipick" utility to the distribution.
3931 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3932 than a timeout (e.g. a certificate is required, and is not provided), an
3933 Exim server now closes the connection immediately. Previously it waited for
3934 the client to close - but if the client is SSL, it seems that they each
3935 wait for each other, leading to a delay before one of them times out.
3937 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3938 maintained 0.8.x compatibility because I don't think many are using it, and
3939 it is clearly obsolete.
3941 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3944 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3945 client certificate was expired. A simple patch fixes this, though I don't
3946 understand the full logic of why the verify callback is called multiple
3949 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3950 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3951 which causes problems with some clients (such as the Certicom SSL Plus
3952 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3953 disables the coutermeasure allowing Eudora to connect."
3955 38. Exim was not checking that a write() to a log file succeeded. This could
3956 lead to Bad Things if a log got too big, in particular if it hit a file
3957 size limit. Exim now panics and dies if it cannot write to a log file, just
3958 as it does if it cannot open a log file.
3960 39. Modified OS/Makefile-Linux so that it now contains
3962 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3964 The two -D definitions ensure that Exim is compiled with large file
3965 support, which makes it possible to handle log files that are bigger than
3968 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3969 instance) a domain was checked against a named list that involved a lookup,
3970 causing $domain_data to be set, then another domain was checked against the
3971 same list, then the first domain was re-checked, the value of $domain_data
3972 after the final check could be wrong. In particular, if the second check
3973 failed, it could be set empty. This bug probably also applied to
3976 41. The strip_trailing_dot option was not being applied to the address given
3977 with the -f command-line option.
3979 42. The code for reading a message's header from the spool was incrementing
3980 $received_count, but never initializing it. This meant that the value was
3981 incorrect (doubled) while delivering a message in the same process in which
3982 it was received. In the most common configuration of Exim, this never
3983 happens - a fresh exec is done - but it can happen when
3984 deliver_drop_privilege is set.
3986 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3987 it now includes up to 150 characters of the unexpected data in the log
3990 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3991 and building data strings. The size of both of these buffers was 10 000
3992 bytes - far larger than anybody would *ever* want, thought I. Needless to
3993 say, somebody hit the limit. I have increased the maximum line length to
3994 20 000 and the maximum data length of concatenated lines to 100 000. I have
3995 also fixed two bugs, because there was no checking on these buffers. Tsk,
3996 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3997 buffer is too small.
3999 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4000 lsearch lookups. Now it does.
4002 46. When parsing a route_list item in a manualroute router, a fixed-length
4003 buffer was used for the list of hosts. I made this 1024 bytes long,
4004 thinking that nobody would ever have a list of hosts that long. Wrong.
4005 Somebody had a whole pile of complicated expansion conditions, and the
4006 string was silently truncated, leading to an expansion error. It turns out
4007 that it is easier to change to an unlimited length (owing to other changes
4008 that have happened since this code was originally written) than to build
4009 structure for giving a limitation error. The length of the item that
4010 expands into the list of hosts is now unlimited.
4012 47. The lsearch lookup could not handle data where the length of text line was
4013 more than 4095 characters. Such lines were truncated, leading to shortened
4014 data being returned. It should now handle lines of any length.
4016 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4017 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4020 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4021 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4022 no longer happens in comment lines. A list of replacements is now placed
4023 at the head of all of the source files, except those whose only change is
4024 to replace PERL_COMMAND in the very first #! line.
4026 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4027 messages on the queue, with a bottom-up merge sort, using code contributed
4028 by Michael Haardt. This should make operations like -bp somewhat faster on
4029 large queues. It won't affect queue runners, except when queue_run_in_order
4032 51. Installed eximstats 1.31 in the distribution.
4034 52. Added support for SRV lookups to the dnslookup router.
4036 53. If an ACL referred to $message_body or $message_body_end, the value was not
4037 reset for any messages that followed in the same SMTP session.
4039 54. The store-handling optimization for building very long strings was not
4040 differentiating between the different store pools. I don't think this
4041 actually made any difference in practice, but I've tidied it.
4043 55. While running the routers to verify a sender address, $sender_address
4044 was still set to the sender address. This is wrong, because when routing to
4045 send a bounce to the sender, it would be empty. Therefore, I have changed
4046 it so that, while verifying a sender address, $sender_address is set to <>.
4047 (There is no change to what happens when verifying a recipient address.)
4049 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4050 target A or AAAA records (if not already returned) without resetting the
4051 qualify_single or search_parents options of the DNS resolver. These are
4052 inappropriate in this case because the targets of MX and SRV records must
4053 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4054 target that, when qualified, matched something in the local domain. These
4055 two options are now turned off when doing these lookups.
4057 57. It seems that at least some releases of Reiserfs (which does not have the
4058 concept of a fixed number of inodes) returns zero and not -1 for the
4059 number of available inodes. This interacted badly with check_spool_inodes,
4060 which assumed that -1 was the "no such thing" setting. What I have done is
4061 to check that the total number of inodes is greater than zero before doing
4062 the test of how many are available.
4064 58. When a "warn" ACL statement has a log_message modifier, the message is
4065 remembered, and not repeated. This is to avoid a lot of repetition when a
4066 message has many recipients that cause the same warning to be written.
4067 Howewer, Exim was preserving the list of already written lines for an
4068 entire SMTP session, which doesn't seem right. The memory is now reset if a
4069 new message is started.
4071 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4072 debugging output unless log_rewrite was also set.
4074 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4075 of (int)(handle) when we know that handle contains (void *)(-1).
4077 61. The Exim daemon panic-logs an error return when it closes the incoming
4078 connection. However "connection reset by peer" seems to be common, and
4079 isn't really an error worthy of noting specially, so that particular error
4082 62. When Exim is trying to find all the local interfaces, it used to panic and
4083 die if the ioctl to get the interface flags failed. However, it seems that
4084 on at least one OS (Solaris 9) it is possible to have an interface that is
4085 included in the list of interfaces, but for which you get a failure error
4086 for this call. This happens when the interface is not "plumbed" into a
4087 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4088 failure of the "get flags" call assumes that the interface is down.
4090 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4091 makes life easier for people who are doing arithmetic on fields extracted
4092 from dates, where you often get leading zeros that should not be
4093 interpreted as octal.
4095 64. Added qualify_domain to the redirect router, to override the global
4098 65. If a pathologically long header line contained very many addresses (the
4099 report of this problem mentioned 10 000) and each of them was rewritten,
4100 Exim could use up a very large amount of memory. (It kept on making new
4101 copies of the header line as it rewrote, and never released the old ones.)
4102 At the expense of a bit more processing, the header rewriting function has
4103 been changed so that it no longer eats memory in this way.
4105 66. The generation of the Received: header has been moved from the time that a
4106 message starts to be received, to the time that it finishes. The timestamp
4107 in the Received: header should now be very close to that of the <= log
4108 line. There are two side-effects of this change:
4110 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4111 logged header lines no longer include the local Received: line, because
4112 it has not yet been created. The same applies to a copy of the message
4113 that is returned to a non-SMTP sender when a message is rejected.
4115 (b) When a filter file is tested using -bf, no additional Received: header
4116 is added to the test message. After some thought, I decided that this
4119 This change does not affect the value of $received_for. It is still set
4120 after address rewriting, but before local_scan() is called.
4122 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4124 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4125 gave an unhelpful panic error message, and a defer error. I have managed to
4126 change this behaviour so that it now rejects any supplied certificate,
4127 which seems right, as the list of acceptable certificates is empty.
4129 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4130 gave an unhelpful defer error. I have not managed to make this reject any
4131 supplied certificates, but the error message it gives is "no certificate
4132 supplied", which is not helpful.
4134 70. exigrep's output now also includes lines that are not associated with any
4135 message, but which match the given pattern. Implemented by a patch from
4136 Martin Sluka, which also tidied up the Perl a bit.
4138 71. Recipient callout verification, like sender verification, was using <> in
4139 the MAIL FROM command. This isn't really the right thing, since the actual
4140 sender may affect whether the remote host accepts the recipient or not. I
4141 have changed it to use the actual sender in the callout; this means that
4142 the cache record is now keyed on a recipient/sender pair, not just the
4143 recipient address. There doesn't seem to be a real danger of callout loops,
4144 since a callout by the remote host to check the sender would use <>.
4145 [SEE ABOVE: changed after hitting problems.]
4147 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4148 temporary errors. However, in the case of such a code being given after
4149 the end of a data transmission (i.e. after ".") Exim was failing to write
4150 a retry record for the message. (Yes, there was some broken host that was
4151 actually sending 8xx at this point.)
4153 73. An unknown lookup type in a host list could cause Exim to panic-die when
4154 the list was checked. (An example that provoked this was putting <; in the
4155 middle of a list instead of at the start.) If this happened during a DATA
4156 ACL check, a -D file could be left lying around. This kind of configuration
4157 error no longer causes Exim to die; instead it causes a defer errror. The
4158 incident is still logged to the main and panic logs.
4160 74. Buglet left over from Exim 3 conversion. The message "too many messages
4161 in one connection" was written to the rejectlog but not the mainlog, except
4162 when address rewriting (yes!) was being logged.
4164 75. Added write_rejectlog option.
4166 76. When a system filter was run not as root (that is, when system_filter_user
4167 was set), the values of the $n variables were not being returned to the
4168 main process; thus, they were not subsequently available in the $sn
4171 77. Added +return_path_on_delivery log selector.
4173 78. A connection timeout was being treated differently from recipients deferred
4174 when testing hosts_max_try with a message that was older than the host's
4175 retry timeout. (The host should not be counted, thus allowing all hosts to
4176 be tried at least once before bouncing.) This may have been the cause of an
4177 occasionally reported bug whereby a message would remain on the queue
4178 longer than the retry timeout, but would be bounced if a delivery was
4179 forced. I say "may" because I never totally pinned down the problem;
4180 setting up timeout/retry tests is difficult. See also the next item.
4182 79. The ultimate address timeout was not being applied to errors that involved
4183 a combination of host plus message (for example, a timeout on a MAIL
4184 command). When an address resolved to a number of possible hosts, and they
4185 were not all tried for each delivery (e.g. because of hosts_max_try), a
4186 message could remain on the queue longer than the retry timeout.
4188 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4191 81. Fixed an obscure SMTP outgoing bug which required at least the following
4192 conditions: (a) there was another message waiting for the same server;
4193 (b) the server returned 5xx to all RCPT commands in the first message so
4194 that the message was not completed; (c) the server dropped the connection
4195 or gave a negative response to the RSET that Exim sends to abort the
4196 transaction. The observed case was a dropped connection after DATA that had
4197 been sent in pipelining mode. That is, the server had advertised PIPELINING
4198 but was not implementing it correctly. The effect of the bug was incorrect
4199 behaviour, such as trying another host, and this could lead to a crash.
4205 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4206 and daemon.c were passed as pointers to ints; they should have been
4207 pointers to socklen_t variables (which are typically unsigned ints).
4209 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4212 3. Fixed a really odd bug that affected only the testing scheme; patching a
4213 certain fixed string in the binary changed the value of another string that
4214 happened to be identical to the end of the original first string.
4216 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4217 name", it returns that address as the IP address. On some operating
4218 systems (e.g. Solaris), it also passes back the IP address string as the
4219 "host name". However, on others (e.g. Linux), it passes back an empty
4220 string. Exim wasn't checking for this, and was changing the host name to an
4221 empty string, assuming it had been canonicized.
4223 5. Although rare, it is permitted to have more than one PTR record for a given
4224 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4225 all the names associated with an address, because they do in Solaris.
4226 However, it seems that they do not in Linux for data that comes from the
4227 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4228 I found this out when I moved to a new Linux workstation and tried to run
4229 the Exim test suite.
4231 To get round this problem I have changed the code so that it now does its
4232 own call to the DNS to look up PTR records when searching for a host name.
4233 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4234 addresses that are only in /etc/hosts are still found.
4236 This behaviour is, however, controlled by an option called host_lookup_
4237 order, which defaults to "bydns:byaddr". If people want to use the other
4238 order, or indeed, just use one or the other means of lookup, they can
4239 specify it in this variable.
4241 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4242 some operating systems, this comes back from gethostbyaddr() as an empty
4243 string, and this is what Exim used to test for. However, it seems that in
4244 other systems, "." is yielded. Exim now tests for this case too.
4246 7. The values of check_spool_space and check_log_space are now held internally
4247 as a number of kilobytes instead of an absolute number of bytes. If a
4248 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4249 kilobyte. This means that much larger values can be stored.
4251 8. Exim monitor: an attempt to get the action menu when not actually pointing
4252 at a message produces an empty menu entitled "No message selected". This
4253 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4254 no entries in it ("Shell widget menu has zero width and/or height"). So I
4255 have added a single, blank menu entry in this case.
4257 9. Added ${quote_local_part.
4259 10. MIME decoding is now applied to the contents of Subject: header lines when
4262 11. Now that a reference to $sender_host_address automatically causes a reverse
4263 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4264 host lookup before query-style lookups in lists that might use this
4265 variable. This has therefore been abolished, and the "net-" prefix is no
4266 longer necessary for query-style lookups.
4268 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4269 have been a typo for LFLAGS, so it has been changed.
4271 13. The install script calls Exim with "-C /dev/null" in order to find the
4272 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4273 to be output. Howeve, since Exim outputs its version number before the
4274 error, it didn't break the script. It just looked ugly. I fixed this by
4275 always allowing "-C /dev/null" if the caller is root.
4277 14. Ignore overlarge ACL variable number when reading spool file - insurance
4278 against a later release with more variables having written the file.
4280 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4281 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4282 this, as well as the form without the "IPv6" on the front.
4284 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4285 OS/Makefile-Darwin file.
4287 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4288 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4290 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4291 variable. However, some OS use ints for inodes. I've added cast to long int
4292 to get rid of the compiler warning.
4294 19. I had forgotten to lock out "/../" in configuration file names when
4295 ALT_CONFIG_PREFIX was set.
4297 20. Routers used for verification do not need to specify transports. However,
4298 if such a router generated a host list, and callout was configured, Exim
4299 crashed, because it could not find a port number from the (non-existent)
4300 transport. It now assumes port 25 in this circumstance.
4302 21. Added the -t option to exigrep.
4304 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4305 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4306 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4307 them is set, LOOKUP_LSEARCH is forced.
4309 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4311 24. Added sender and host information to the "rejected by local_scan()" log
4312 line; previously there was no indication of these.
4314 25. Added .include_if_exists.
4316 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4317 Linux. It turns out that not all file systems support this. Apparently some
4318 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4319 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4320 not supported on the file descriptor, is now ignored when Exim is trying to
4321 sync a directory. This applies only to Linux.
4323 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4325 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4326 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4329 29. Added support for maildirsize files from supplied patch (modified a bit).
4331 30. The use of :fail: followed by an empty string could lead Exim to respond to
4332 sender verification failures with (e.g.):
4334 550 Verification failed for <xxx>
4335 550 Sender verify failed
4337 where the first response line was missing the '-' that indicates it is not
4338 the final line of the response.
4340 31. The loop for finding the name of the user that called Exim had a hardwired
4341 limit of 10; it now uses the value of finduser_retries, which is used for
4342 all other user lookups.
4344 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4347 33. Exim was neglecting to zero errno before one call of strtol() when
4348 expanding a string and expecting an integer value. On some systems this
4349 resulted in spurious "integer overflow" errors. Also, it was casting the
4350 result into an int without checking.
4352 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4353 did not work. The code looks as if it has *never* worked, though it appears
4354 to have been documented since at least releast 1.62. I have made it work.
4356 35. The "timeout_DNS" error in retry rules, also documented since at least
4357 1.62, also never worked. As it isn't clear exactly what this means, and
4358 clearly it isn't a major issue, I have abolished the feature by treating it
4359 as "timeout", and writing a warning to the main and panic logs.
4361 36. The display of retry rules for -brt wasn't always showing the error code
4364 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4365 timeout_connect_A, timeout_connect_MX.
4367 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4368 to the empty sender.
4370 39. The daemon was not analysing the content of -oX till after it had closed
4371 stderr and disconnected from the controlling terminal. This meant that any
4372 syntax errors were only noted on the panic log, and the return code from
4373 the command was 0. By re-arranging the code a little, I've made the
4374 decoding happen first, so such errors now appear on stderr, and the return
4375 code is 1. However, the actual setting up of the sockets still happens in
4376 the disconnected process, so errors there are still only recorded on the
4379 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4380 connections (as happens on some IP stacks) was logged at start up time as
4381 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4382 it from "IPv6 and IPv4", which means that two separate sockets are being
4385 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4386 says whether AF_INET or AF_INET6 was passed as an argument.
4388 42. Exiwhat output was messed up when time zones were included in log
4391 43. Exiwhat now gives more information about the daemon's listening ports,
4392 and whether -tls-on-connect was used.
4394 44. The "port" option of the smtp transport is now expanded.
4396 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4397 silently ignored. Now an error message is written to the main and panic
4400 46. There's a new ACL modifier called "logwrite" which writes to a log file
4401 as soon as it is encountered.
4403 47. Added $local_user_uid and $local_user_gid at routing time.
4405 48. Exim crashed when trying to verify a sender address that was being
4408 49. Exim was recognizing only a space character after ".include". It now also
4409 recognizes a tab character.
4411 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4412 extracting the relevant information from the specification. The man page no
4413 longer contains scrambled data for the -d option, and I've added a section
4414 at the front about calling Exim under different names.
4416 51. Added "extra_headers" argument to the "mail" command in filter files.
4418 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4421 53. Installed eximstats 1.29.
4423 54. Added transport_filter_timeout as a generic transport option.
4425 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4426 Cc: header lines. This was required by RFC 822, but it not required by RFC
4429 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4430 incoming messages that did not have them. Now it does so only if the
4431 message originates locally, that is, if there is no associated remote host
4432 address. When Resent- header lines are present, this applies to the Resent-
4433 lines rather than the non-Resent- lines.
4435 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4436 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4438 58. Messages for configuration errors now include the name of the main
4439 configuration file - useful now that there may be more than one file in a
4440 list (.included file names were always shown).
4442 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4443 for those rare installations that do not start the daemon as root or run it
4444 setuid root. I've cut out the call to initgroups() if the daemon is not
4447 60. The Exim user and group can now be bound into the binary as text strings
4448 that are looked up at the start of Exim's processing.
4450 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4452 62. Added $mailstore_basename variable.
4454 63. Installed patch to sieve.c from Michael Haardt.
4456 64. When Exim failed to open the panic log after failing to open the main log,
4457 the original message it was trying to log was written to stderr and debug
4458 output, but if they were not available (the usual case in production), it
4459 was lost. Now it is written to syslog before the two lines that record the
4460 failures to open the logs.
4462 65. Users' Exim filters run in subprocesses under the user's uid. It is
4463 possible for a "deliver" command or an alias in a "personal" command to
4464 provoke an address rewrite. If logging of address rewriting is configured,
4465 this fails because the process is not running as root or exim. There may be
4466 a better way of dealing with this, but for the moment (because 4.30 needs
4467 to be released), I have disabled address rewrite logging when running a
4468 filter in a non-root, non-exim process.
4474 1. The buildconfig auxiliary program wasn't quoting the value set for
4475 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4476 not defined. This bug was masked in 4.22 by the effect that was fixed in
4479 2. Some messages that were rejected after a message id was allocated were
4480 shown as "incomplete" by exigrep. It no longer does this for messages that
4481 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4483 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4484 have allow_domain_literals set, the ID did not get logged in the <= line.
4485 Domain literals are now always recognized in Message-ID: header lines.
4487 4. The first argument for a ${extract expansion item is the key name or field
4488 number. Leading and trailing spaces in this item were not being ignored,
4489 causing some misleading effects.
4491 5. When deliver_drop_privilege was set, single queue runner processes started
4492 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4493 same command in the process it spins off) were not dropping privilege.
4495 6. When the daemon running as "exim" started a queue runner, it always
4496 re-executed Exim in the spun-off process. This is a waste of effort when
4497 deliver_drop_privilege is set. The new process now just calls the
4498 queue-runner function directly.
4504 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4507 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4508 ignored. Though the use of -oP was forcing the writing of a pid file, it
4509 was always written to the default place.
4511 3. If the message "no IP address found for host xxxx" is generated during
4512 incoming verification, it is now followed by identification of the incoming
4513 connection (so you can more easily find what provoked it).
4515 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4517 5. Added some features to "harden" Exim a bit more against certain attacks:
4519 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4520 be put in Local/Makefile. This is like the never_users runtime option,
4521 but it cannot be overridden. The default setting is "root".
4523 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4524 prefix string with which any file named in a -C command line option
4527 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4528 is retained for -C and -D only if the caller of Exim is root. Without
4529 it, the exim user may also use -C and -D and retain privilege.
4531 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4532 command line option is disabled.
4534 6. Macro names set by the -D option must start with an upper case letter, just
4535 like macro names defined in the configuration file.
4537 7. Added "dereference=" facility to LDAP.
4539 8. Two instances of the typo "uknown" in the source files are fixed.
4541 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4542 the Configure-Makefile script screwed up while processing it.
4544 10. Incorporated PCRE 4.4.
4546 11. The SMTP synchronization check was not operating right at the start of an
4547 SMTP session. For example, it could not catch a HELO sent before the client
4548 waited for the greeting. There is now a check for outstanding input at the
4549 point when the greeting is written. Because of the duplex, asynchronous
4550 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4551 way, but not yet received, when the check is performed.
4553 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4554 on TCP/IP sockets, because this apparently causes some broken clients to
4557 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4558 unchanged) from the Cygwin maintainer.
4560 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4561 was supported instead of testing for mbx. Effectively a typo.
4563 15. The spa authenticator server code was not checking that the input it
4564 received was valid base64.
4566 16. The debug output line for the "set" modifier in ACLs was not showing the
4567 name of the variable that was being set.
4569 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4571 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4572 lookup on its own. Something else was needed to trigger the lookup. For
4573 example, a match in host_lookup or the need for a host name in a host list.
4574 Now, if $sender_host_name is referenced and the host name has not yet been
4575 looked up, a lookup is performed. If the lookup fails, the variable remains
4576 empty, and $host_lookup_failed is set to "1".
4578 19. Added "eqi" as a case-independent comparison operator.
4580 20. The saslauthd authentication condition could segfault if neither service
4581 nor realm was specified.
4583 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4584 error message that was logged was misleading, and incoming SMTP
4585 connections were dropped. The message is now more accurate, and temporary
4586 errors are given to SMTP connections.
4588 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4589 (except RSET) with a 421 error, until QUIT is received. However, it was
4590 failing to send a response to QUIT.
4592 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4593 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4594 ACL is now run after the helo_try_verify_hosts code.
4596 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4597 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4598 case-independent, so other case variants are also recognized). Apparently
4599 some systems use these upper case variants.
4601 25. If more than two messages were waiting for the same host, and a transport
4602 filter was specified for the transport, Exim sent two messages over the
4603 same TCP/IP connection, and then failed with "socket operation on non-
4604 socket" when it tried to send the third.
4606 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4608 27. The extern definition of crypt16() in expand.c was not being excluded when
4609 the OS had its own crypt16() function.
4611 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4612 as a preferred synonym for return_size_limit, both as an option and as an
4615 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4617 30. Changed the default configuration ACL to relax the local part checking rule
4618 for addresses that are not in any local domains. For these addresses,
4619 slashes and pipe symbols are allowed within local parts, but the sequence
4620 /../ is explicitly forbidden.
4622 31. SPA server authentication was not clearing the challenge buffer before
4625 32. log_message in a "warn" ACL statement was writing to the reject log as
4626 well as to the main log, which contradicts the documentation and doesn't
4627 seem right (because no rejection is happening). So I have stopped it.
4629 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4630 However, I am unable to do any testing of this.
4632 34. Fixed an infelicity in the appendfile transport. When checking directories
4633 for a mailbox, to see if any needed to be created, it was accidentally
4634 using path names with one or more superfluous leading slashes; tracing
4635 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4637 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4638 contents are added to the log line that is written for every discarded
4639 recipient. (Previously a log_message setting was ignored.)
4641 36. The ${quote: operator now quotes the string if it is empty.
4643 37. The install script runs exim in order to find its version number. If for
4644 some reason other than non-existence or emptiness, which it checks, it
4645 could not run './exim', it was installing it with an empty version number,
4646 i.e. as "exim-". This error state is now caught, and the installation is
4649 38. An argument was missing from the function that creates an error message
4650 when Exim fails to connect to the socket for saslauthd authentication.
4651 This could cause Exim to crash, or give a corrupted message.
4653 39. Added isip, isip4, and isip6 to ${if conditions.
4655 40. The ACL variables $acl_xx are now saved with the message, and can be
4656 accessed later in routers, transports, and filters.
4658 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4659 strings in the file are not string-expanded.
4661 42. If a MAIL command specified a SIZE value that was too large to fit into an
4662 int variable, the check against message_size_limit failed. Such values are
4663 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4664 day this will have to be increased, but I don't think I want to be around
4665 when emails are that large.
4672 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4673 iconv() is not standard in FreeBSD.
4675 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4676 IPv6 enabled. The observed symptom was a segmentation fault on return from
4677 the function os_common_find_running_interfaces() in src/os.c.
4679 3. In the check_special_case() function in daemon.c I had used "errno" as an
4680 argument name, which causes warnings on some systems. This was basically a
4681 typo, since it was named "eno" in the comments!
4683 4. The code that waits for the clock to tick (at a resolution of some fraction
4684 of a second) so as to ensure message-id uniqueness was always waiting for
4685 at least one whole tick, when it could have waited for less. [This is
4686 almost certainly not relevant at current processor speeds, where it is
4687 unlikely to ever wait at all. But we try to future-proof.]
4689 5. The function that sleeps for a time interval that includes fractions of a
4690 second contained a race. It did not block SIGALRM between setting the
4691 timer, and suspending (a couple of lines later). If the interval was short
4692 and the sigsuspend() was delayed until after it had expired, the suspension
4693 never ended. On busy systems this could lead to processes getting stuck for
4696 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4697 process, before it forks any delivery processes. The open lookup caching
4698 mechanism meant that the open file or database connection was passed into
4699 the delivery process. The problem was that delivery processes always tidy
4700 up cached lookup data. This could cause a problem for the next delivery
4701 process started by the queue runner, because the external queue runner
4702 process does not know about the closure. So the next delivery process
4703 still has data in the lookup cache. In the case of a file lookup, there was
4704 no problem because closing a file descriptor in a subprocess doesn't affect
4705 the parent. However, if the lookup was caching a connection to a database,
4706 the connection was closed, and the second delivery process was likely to
4707 see errors such as "PGSQL: query failed: server closed the connection
4708 unexpectedly". The problem has been fixed by closing all cached lookups
4709 in a queue runner before running a delivery process.
4711 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4712 seem to have the "const" qualifier which it has on other OS. I've
4715 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4716 *of the same type* (client or server) with the same public name that an
4717 error should be diagnosed.
4719 9. When Exim looked up a host name for an IP address, but failed to find the
4720 original IP address when looking up the host name (a safety check), it
4721 output the message "<ip address> does not match any IP for NULL", which was
4722 confusing, to say the least. The bug was that the host name should have
4723 appeared instead of "NULL".
4725 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4726 user that is built into the binary, and the -C or -D options is used, root
4727 privilege is dropped before the configuration file is read. In addition,
4728 logging is switched to stderr instead of the normal log files. If the
4729 configuration then re-defines the Exim user, the unprivileged environment
4730 is probably not what is expected, so Exim logs a panic warning message (but
4733 However, if deliver_drop_privilege is set, the unprivileged state may well
4734 be exactly what is intended, so the warning has been cut out in that case,
4735 and Exim is allowed to try to write to its normal log files.
4741 1. smtp_return_error_details was not giving details for temporary sender
4742 or receiver verification errors.
4744 2. Diagnose a configuration error if two authenticators have the same public
4747 3. Exim used not to create the message log file for a message until the first
4748 delivery attempt. This could be confusing when incoming messages were held
4749 for policy or load reasons. The message log file is now created at the time
4750 the message is received, and an initial "Received" line is written to it.
4752 4. The automatically generated man page for command line options had a minor
4753 bug that caused no ill effects; however, a more serious problem was that
4754 the procedure for building the man page automatically didn't always
4755 operate. Consequently, release 4.20 contains an out-of-date version. This
4756 shouldn't happen again.
4758 5. When building Exim with embedded Perl support, the script that builds the
4759 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4760 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4762 6. The freeze_tell option was not being used for messages that were frozen on
4763 arrival, either by an ACL or by local_scan().
4765 7. Added the smtp_incomplete_transaction log selector.
4767 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4768 was accepting AUTH without a new EHLO.
4770 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4771 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4774 10. Logging of TCP/IP connections (when configured) now happens in the main
4775 daemon process instead of the child process, so that the TCP/IP connection
4776 count is more accurate (but it can never be perfect).
4778 11. The use of "drop" in a nested ACL was not being handled correctly in the
4779 outer ACL. Now, if condition failure induced by the nested "drop" causes
4780 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4781 or "require"), the connection is dropped.
4783 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4784 that yield "discard" can now be used with an "accept" or a "discard" verb,
4785 but an error is generated for any others (because I can't see a useful way
4786 to define what should happen).
4788 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4789 are now processed in the same way as lines in the Exim configuration file.
4790 In particular, continuation lines are supported.
4792 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4794 15. Added -ti meaning -t -i.
4796 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4797 domains, and warn by logging if others are found.
4799 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4800 returned from GIFCONF when Exim is trying to find the list of interfaces on
4801 a host. The code in os.c has been modified to copy each ifreq to an aligned
4802 structure in all cases.
4804 Also, in some cases, the returned ifreq's were being copied to a 'struct
4805 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4806 means the last couple of bytes of an IPv6 address could be chopped if the
4807 ifreq contained only a normal sockaddr (14 bytes storage).
4809 18. Named domain lists were not supported in the hosts_treat_as_local option.
4810 An entry such as +xxxx was not recognized, and was treated as a literal
4813 19. Ensure that header lines added by a DATA ACL are included in the reject log
4814 if the ACL subsequently rejects the message.
4816 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4817 MD5 (which is deprecated).
4819 21. When testing a filter file using -bf, Exim was writing a message when it
4820 took the sender from a "From " line in the message, but it was not doing so
4821 when it took $return_path from a Return-Path: header line. It now does.
4823 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4824 with a valid header line field name (a series of printing characters
4825 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4827 23. Changed "disc" in the source to "disk" to conform to the documentation and
4828 the book and for uniformity.
4830 24. Ignore Sendmail's -Ooption=value command line item.
4832 25. When execve() failed while trying to run a command in a pipe transport,
4833 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4834 could be confused with a return value of 69 from the command itself. This
4835 has been changed to 127, the value the shell returns if it is asked to run
4836 a non-existent command. The wording for the related log line suggests a
4837 non-existent command as the problem.
4839 26. If received_header_text expands to an empty string, do not add a Received:
4840 header line to the message. (Well, it adds a token one on the spool, but
4841 marks it "old" so that it doesn't get used or transmitted.)
4843 27. Installed eximstats 1.28 (addition of -nt option).
4845 28. There was no check for failure on the call to getsockname() in the daemon
4846 code. This can fail if there is a shortage of resources on the system, with
4847 ENOMEM, for example. A temporary error is now given on failure.
4849 29. Contrary to the C standard, it seems that in some environments, the
4850 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4851 program. Exim now does this explicitly; it affects the formatting of
4852 timestamps using strftime().
4854 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4855 complaints. I've now initialized all the variables, to avoid this.
4857 32. Header lines added by a system filter were not being "seen" during
4858 transport-time rewrites.
4860 33. The info_callback() function passed to OpenSSL is set up with type void
4861 (*)(SSL *, int, int), as described somewhere. However, when calling the
4862 function (actually a macro) that sets it up, the type void(*)() is
4863 expected. I've put in a cast to prevent warnings from picky compilers.
4865 34. If a DNS black list lookup found a CNAME record, but there were no A
4866 records associated with the domain it pointed at, Exim crashed.
4868 35. If a DNS black list lookup returned more than one A record, Exim ignored
4869 all but the first. It now scans all returned addresses if a particular IP
4870 value is being sought. In this situation, the contents of the
4871 $dnslist_value variable are a list of all the addresses, separated by a
4874 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4875 to accept a host name and all its aliases if the forward lookup for any of
4876 them yielded the IP address of the incoming connection. Now it accepts only
4877 those names whose forward lookup yields the correct IP address. Any other
4878 names are discarded. This closes a loophole whereby a rogue DNS
4879 administrator could create reverse DNS records to break through a
4880 wildcarded host restriction in an ACL.
4882 37. If a user filter or a system filter that ran in a subprocess used any of
4883 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4884 the wrong values were passed to the pipe command ($thisaddress had the
4885 value of $0, $0 had the value of $1, etc). This bug was introduced by
4886 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4888 38. Improved the line breaking for long SMTP error messages from ACLs.
4889 Previously, if there was no break point between 40 and 75 characters, Exim
4890 left the rest of the message alone. Two changes have been made: (a) I've
4891 reduced the minimum length to 35 characters; (b) if it can't find a break
4892 point between 35 and 75 characters, it looks ahead and uses the first one
4893 that it finds. This may give the occasional overlong line, but at least the
4894 remaining text gets split now.
4896 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4897 file descriptors might be low, and that setting 1000 would always raise it.
4898 It turns out that in some environments, the limit is already over 1000 and
4899 that lowering it causes trouble. So now Exim takes care not to decrease it.
4901 40. When delivering a message, the value of $return_path is set to $sender_
4902 address at the start of routing (routers may change the value). By an
4903 oversight, this default was not being set up when an address was tested by
4904 -bt or -bv, which affected the outcome if any router or filter referred to
4907 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4908 log only when "message" or "log_message" are set. However, if one of the
4909 conditions was an address verification, or a call to a nested ACL, the
4910 messages generated by the underlying test were being passed through. This
4911 no longer happens. The underlying message is available in $acl_verify_
4912 message for both "message" and "log_message" expansions, so it can be
4913 passed through if needed.
4915 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4916 new expansion $bh_ to give the encoded byte string without charset
4917 translation. Translation happens only if iconv() is available; HAVE_ICONV
4918 indicates this at build time. HEADERS_CHARSET gives the charset to
4919 translate to; headers_charset can change it in the configuration, and
4920 "headers charset" can change it in an individual filter file.
4922 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4923 that creates RFC 2047 encoded "words" labels them as that charset instead
4924 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4925 expansion operator; (ii) when Exim creates a From: line for a local
4926 message; (iii) when a header line is rewritten to include a "phrase" part.
4928 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4929 buggy, causing it to skip the first lines of messages whose message ID
4930 ended in 'D'. This would not have bitten before Exim release 4.14, because
4931 message IDs were unlikely to end in 'D' before then. The effect was to have
4932 incorrect size information for certain domains.
4934 45. #include "config.h" was missing at the start of the crypt16.c module. This
4935 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4938 46. If there was a timeout during a "random" callout check, Exim treated it as
4939 a failure of the random address, and carried on sending RSET and the real
4940 address. If the delay was just some slowness somewhere, the response to the
4941 original RCPT would be taken as a response to RSET and so on, causing
4942 mayhem of various kinds.
4944 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4945 when I implemented it. It didn't allow for the fact that some option values
4946 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4947 the right test for positive values.
4949 48. Domain names in DNS records are case-independent. Exim always looks them up
4950 in lower case. Some resolvers return domain names in exactly the case they
4951 appear in the zone file, that is, they may contain uppercase letters. Not
4952 all resolvers do this - some return always lower case. Exim was treating a
4953 change of case by a resolver as a change of domain, similar to a widening
4954 of a domain abbreviation. This triggered its re-routing code and so it was
4955 trying to route what was effectively the same domain again. This normally
4956 caused routing to fail (because the router wouldn't handle the domain
4957 twice). Now Exim checks for this case specially, and just changes the
4958 casing of the domain that it ultimately uses when it transmits the message
4961 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4964 50. If a filter generated a file delivery with a non-absolute name (possible if
4965 no home directory exists for the router), the forbid_file option was not
4968 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4969 the existing equality matching.
4971 52. Exim was using ints instead of ino_t variables in some places where it was
4972 dealing with inode numbers.
4974 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4975 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4976 called TMPDIR, and if it finds it is different, it changes its value.
4978 54. The smtp_printf() function is now made available to local_scan() so
4979 additional output lines can be written before returning. There is also an
4980 smtp_fflush() function to enable the detection of a dropped connection.
4981 The variables smtp_input and smtp_batched_input are exported to
4984 55. Changed the default runtime configuration: the message "Unknown user"
4985 has been removed from the ACL, and instead placed on the localuser router,
4986 using the cannot_route_message feature. This means that any verification
4987 failures that generate their own messages won't get overridden. Similarly,
4988 the "Unrouteable address" message that was in the ACL for unverifiable
4989 relay addresses has also been removed.
4991 56. Added hosts_avoid_esmtp to the smtp transport.
4993 57. The exicyclog script was not checking for the esoteric option
4994 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4995 will work only if exicyclog is run under the appropriate euid.
4997 58. Following a discussion on the list, the rules by which Exim recognises line
4998 endings on incoming messages have been changed. The -dropcr and drop_cr
4999 options are now no-ops, retained only for backwards compatibility. The
5000 following line terminators are recognized: LF CRLF CR. However, special
5001 processing applies to CR:
5003 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5004 nor a local message in the state where . is a terminator.
5006 (ii) If a bare CR is encountered in a header line, an extra space is added
5007 after the line terminator so as not to end the header. The reasoning
5008 behind this is that bare CRs in header lines are most likely either
5009 to be mistakes, or people trying to play silly games.
5011 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5012 was being incorrectly given as 18 bytes larger than it should have been.
5013 This is a VOB (very old bug).
5015 60. This may never have affected anything current, but just in case it has:
5016 When the local host is found other than at the start of a list of hosts,
5017 the local host, those with the same MX, and any that follow, are discarded.
5018 When the list in question was part of a longer list of hosts, the following
5019 hosts (not currently being processed) were also being discarded. This no
5020 longer happens. I'm not sure if this situation could ever has previously
5023 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5026 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5027 header. This is something that is recommended in a new Internet Draft, and
5028 is something that is documented as being done by Sendmail. There are two
5029 possible values. For messages generated by the autoreply transport, Exim
5032 Auto-Submitted: auto-replied
5034 whereas for all other generated messages (e.g. bounces) it adds
5036 Auto-Submitted: auto-generated
5038 63. The "personal" condition in filters now includes a test for the
5039 Auto-Submitted: header. If it contains the string "auto-" the message it
5040 not considered personal.
5042 64. Added rcpt_include_affixes as a generic transport option.
5044 65. Added queue_only_override (default true).
5046 66. Added the syslog_duplication option.
5048 67. If what should have been the first header line of a message consisted of
5049 a space followed by a colon, Exim was mis-interpreting it as a header line.
5050 It isn't of course - it is syntactically invalid and should therefore be
5051 treated as the start of the message body. The misbehaviour could have
5052 caused a number of strange effects, including loss of data in subsequent
5053 header lines, and spool format errors.
5055 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5056 client host had authenticated. This control can now be exercised by an ACL
5057 for more flexibility.
5059 69. By default, callouts do not happen when testing with -bh. There is now a
5060 variant, -bhc, which does actually run the callout code, including
5061 consulting and updating the callout cache.
5063 70. Added support for saslauthd authentication, courtesy of Alexander
5066 71. If statvfs() failed on the spool or log directories while checking their
5067 size for availability, Exim confusingly gave the error "space shortage".
5068 Furthermore, in debugging mode it crashed with a floating point exception.
5069 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5070 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5071 serious problem, Exim now writes to the main and panic logs when this
5072 happens, with details of the failure. It then refuses to accept the
5073 incoming message, giving the message "spool directory problem" or "log
5074 directory problem" with a 421 code for SMTP messages.
5076 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5077 0, 1, and 2 exist, because some OS complain for execs without them (see
5078 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5079 descriptors. However, the code omitted to check that the open succeeded,
5080 causing mysterious errors if for some reason the permissions on /dev/null
5081 got screwed. Now Exim writes a message to the main and panic logs, and
5082 bombs out if it can't open /dev/null.
5084 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5085 interact so that it is all more flexible. It is supposed to remain
5086 backwards compatible. Also added extra_local_interfaces.
5088 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5089 to bomb out with an assertion failure - to the client this appears as a
5090 connection drop. This problem occurs in the part of the code that was taken
5091 from the Samba project. Fortunately, the assertion is in a very simple
5092 function, so I have fixed this by reproducing the function inline in the
5093 one place where it is called, and arranging for authentication to fail
5094 instead of killing the process with assert().
5096 75. The SPA client code was not working when the server requested OEM rather
5097 than Unicode encoding.
5099 76. Added code to make require_files with a specific uid setting more usable in
5100 the case where statting the file as root fails - usually a non-root-mounted
5101 NFS file system. When this happens and the failure is EACCES, Exim now
5102 forks a subprocess and does the per-uid checking as the relevant uid.
5104 77. Added process_log_path.
5106 78. If log_file_path was not explicitly set, a setting of check_log_space or
5107 check_log_inodes was ignored.
5109 79. If a space check for the spool or log partitions fails, the incident is now
5110 logged. Of course, in the latter case the data may get lost...
5112 80. Added the %p formatting code to string_format() so that it can be used to
5113 print addresses in debug_print(). Adjusted all the address printing in the
5114 debugging in store.c to use %p rather than %d.
5116 81. There was a concern that a line of code in smtp_in.c could overflow a
5117 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5118 initially expressed, the concern was not well-founded, because trailing
5119 spaces are removed early. However, if the trailing spaces were followed by
5120 a NULL, they did not get removed, so the overflow was possible. Two fixes
5123 (a) I re-wrote the offending code in a cleaner fashion.
5124 (b) If an incoming SMTP command contains a NULL character, it is rejected
5127 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5128 runs initgroups(), so that if the Exim user is in any additional groups,
5129 they will be used during message reception.
5135 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob