1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.631 2010/06/09 01:30:16 pdp 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.
57 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
58 $data_path, and $header_path variables; fixed documentation bugs and
61 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
62 exipick to access non-standard spools, including the "frozen" queue
65 NM/01 Bugzilla 965: Support mysql stored procedures.
66 Patch from Alain Williams
68 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
70 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
71 Patch from Andreas Metzler
73 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
74 Patch from Kirill Miazine
76 NM/05 Bugzilla 671: Added umask to procmail example.
78 JJ/03 installed exipick 20100323.0, fixing doc bug
80 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
81 directory. Notification and patch from Dan Rosenberg.
83 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
85 TK/02 Improve log output when DKIM signing operation fails.
87 MH/01 Treat the transport option dkim_domain as a colon separated
88 list, not as a single string, and sign the message with each element,
89 omitting multiple occurences of the same signer.
91 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
92 Bugzilla 985, 986. Patch by Simon Arlott
94 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
97 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
98 MBX locking. Notification from Dan Rosenberg.
104 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
106 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
108 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
110 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
112 NM/04 Bugzilla 915: Flag broken perl installation during build.
118 TK/01 Added patch by Johannes Berg that expands the main option
119 "spamd_address" if it starts with a dollar sign.
121 TK/02 Write list of recipients to X-Envelope-Sender header when building
122 the mbox-format spool file for content scanning (suggested by Jakob
125 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
126 (http://www.dcc-servers.net/) support via dccifd. Activated by
127 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
129 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
130 by Mark Daniel Reidel <mr@df.eu>.
132 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
133 When building exim an external PCRE library is now needed -
134 PCRE is a system library on the majority of modern systems.
135 See entry on PCRE_LIBS in EDITME file.
137 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
138 conversation. Added nologin parameter to request.
139 Patch contributed by Kirill Miazine.
141 TF/01 Do not log submission mode rewrites if they do not change the address.
143 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
145 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
146 log files in place. Contributed by Roberto Lima.
148 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
150 TF/03 Bugzilla 615: When checking the local_parts router precondition
151 after a local_part_suffix or local_part_prefix option, Exim now
152 does not use the address's named list lookup cache, since this
153 contains cached lookups for the whole local part.
155 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
156 Robert Millan. Documentation is in experimental-spec.txt.
158 TF/04 Bugzilla 668: Fix parallel build (make -j).
160 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
162 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
163 Patch provided by Jan Srzednicki.
165 TF/05 Leading white space used to be stripped from $spam_report which
166 wrecked the formatting. Now it is preserved.
168 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
169 that they are available at delivery time.
171 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
173 TF/08 TLS error reporting now respects the incoming_interface and
174 incoming_port log selectors.
176 TF/09 Produce a more useful error message if an SMTP transport's hosts
177 setting expands to an empty string.
179 NM/06 Bugzilla 744: EXPN did not work under TLS.
180 Patch provided by Phil Pennock.
182 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
183 Patch provided by Richard Godbee.
185 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
186 acl_smtp_notquit, added index entry.
188 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
189 Patch provided by Eugene Bujak.
191 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
192 accept(). Patch provided by Maxim Dounin.
194 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
195 Patch provided by Phil Pennock.
197 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
199 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
200 Patch provided by Brad "anomie" Jorsch.
202 NM/14 Bugzilla 622: Added timeout setting to transport filter.
203 Patch provided by Dean Brooks.
205 TK/05 Add native DKIM support (does not depend on external libraries).
207 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
208 Patch provided by Graeme Fowler.
210 NM/16 Bugzilla 851: Documentation example syntax fix.
212 NM/17 Changed NOTICE file to remove references to embedded PCRE.
214 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
217 NM/19 Bugzilla 745: TLS version reporting.
218 Patch provided by Phil Pennock.
220 NM/20 Bugzilla 167: bool: condition support.
221 Patch provided by Phil Pennock.
223 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
224 clients. Patch provided by Phil Pennock.
226 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
227 Patch provided by Brad "anomie" Jorsch.
229 NM/23 Bugzilla 687: Fix misparses in eximstats.
230 Patch provided by Heiko Schlittermann.
232 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
233 Patch provided by Heiko Schlittermann.
235 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
236 plus update to original patch.
238 NM/26 Bugzilla 799: Documentation correction for ratelimit.
240 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
241 Patch provided by David Brownlee.
243 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
245 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
247 NM/30 Bugzilla 888: TLS documentation bugfixes.
249 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
251 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
252 Unlike the original bugzilla I have changed all shell scripts in src tree.
254 NM/33 Bugzilla 898: Transport filter timeout fix.
255 Patch by Todd Rinaldo.
257 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
258 Patch by Serge Demonchaux.
260 NM/35 Bugzilla 39: Base64 decode bug fixes.
261 Patch by Jakob Hirsch.
263 NM/36 Bugzilla 909: Correct connect() call in dcc code.
265 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
267 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
269 NM/39 Bugzilla 911: Fixed MakeLinks build script.
275 TK/01 Add preliminary DKIM support. Currently requires a forked version of
276 ALT-N's libdkim that I have put here:
277 http://duncanthrax.net/exim-experimental/
279 Note to Michael Haardt: I had to rename some vars in sieve.c. They
280 were called 'true' and it seems that C99 defines that as a reserved
281 keyword to be used with 'bool' variable types. That means you could
282 not include C99-style headers which use bools without triggering
283 build errors in sieve.c.
285 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
286 as mailq or other aliases. Changed the --help handling significantly
287 to do whats expected. exim_usage() emits usage/help information.
289 SC/01 Added the -bylocaldomain option to eximstats.
291 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
293 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
295 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
301 PH/01 Another patch from the Sieve maintainer.
303 PH/02 When an IPv6 address is converted to a string for single-key lookup
304 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
305 dots are used instead of colons so that keys in lsearch files need not
306 contain colons. This was done some time before quoting was made available
307 in lsearch files. However, iplsearch files do require colons in IPv6 keys
308 (notated using the quote facility) so as to distinguish them from IPv4
309 keys. This meant that lookups for IP addresses in host lists did not work
310 for iplsearch lookups.
312 This has been fixed by arranging for IPv6 addresses to be expressed with
313 colons if the lookup type is iplsearch. This is not incompatible, because
314 previously such lookups could never work.
316 The situation is now rather anomolous, since one *can* have colons in
317 ordinary lsearch keys. However, making the change in all cases is
318 incompatible and would probably break a number of configurations.
320 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
323 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
324 conversion specification without a maximum field width, thereby enabling
325 a rogue spamd server to cause a buffer overflow. While nobody in their
326 right mind would setup Exim to query an untrusted spamd server, an
327 attacker that gains access to a server running spamd could potentially
328 exploit this vulnerability to run arbitrary code as the Exim user.
330 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
331 $primary_hostname instead of what libspf2 thinks the hosts name is.
333 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
334 a directory entry by the name of the lookup key. Previously, if a
335 symlink pointed to a non-existing file or a file in a directory that
336 Exim lacked permissions to read, a lookup for a key matching that
337 symlink would fail. Now it is enough that a matching directory entry
338 exists, symlink or not. (Bugzilla 503.)
340 PH/03 The body_linecount and body_zerocount variables are now exported in the
343 PH/04 Added the $dnslist_matched variable.
345 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
346 This means they are set thereafter only if the connection becomes
349 PH/06 Added the client_condition to authenticators so that some can be skipped
350 by clients under certain conditions.
352 PH/07 The error message for a badly-placed control=no_multiline_responses left
353 "_responses" off the end of the name.
355 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
357 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
358 (without spaces) instead of just copying the configuration text.
360 PH/10 Added the /noupdate option to the ratelimit ACL condition.
362 PH/11 Added $max_received_linelength.
364 PH/12 Added +ignore_defer and +include_defer to host lists.
366 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
367 way in which PCRE > 7.0 is built.
369 PH/14 Implemented queue_only_load_latch.
371 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
372 MAIL command. The effect was to mangle the value on 64-bit systems.
374 PH/16 Another patch from the Sieve maintainer.
376 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
378 PH/18 If a system quota error occurred while trying to create the file for
379 a maildir delivery, the message "Mailbox is full" was not appended to the
380 bounce if the delivery eventually timed out. Change 4.67/27 below applied
381 only to a quota excession during the actual writing of the file.
383 PH/19 It seems that peer DN values may contain newlines (and other non-printing
384 characters?) which causes problems in log lines. The DN values are now
385 passed through string_printing() before being added to log lines.
387 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
388 and InterBase are left for another time.)
390 PH/21 Added message_body_newlines option.
392 PH/22 Guard against possible overflow in moan_check_errorcopy().
394 PH/23 POSIX allows open() to be a macro; guard against that.
396 PH/24 If the recipient of an error message contained an @ in the local part
397 (suitably quoted, of course), incorrect values were put in $domain and
398 $local_part during the evaluation of errors_copy.
404 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
405 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
408 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
409 issue a MAIL command.
411 PH/02 In an ACL statement such as
413 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
415 if a client was not listed at all, or was listed with a value other than
416 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
417 the condition was not true (as it should be), so access was not denied.
418 The bug was that the ! inversion was incorrectly passed on to the second
419 item. This has been fixed.
421 PH/03 Added additional dnslists conditions == and =& which are different from
422 = and & when the dns lookup returns more than one IP address.
424 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
425 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
427 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
428 FSYNC, which compiles an option called disable_fsync that allows for
429 bypassing fsync(). The documentation is heavily laced with warnings.
431 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
433 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
434 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
435 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
436 including adding "make clean"; (3) Added -fPIC when compiling the test
437 dynamically loaded module, to get rid of a warning.
439 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
440 message fails, move_frozen_messages = true and ignore_bounce_errors_after
441 = 0s. The bug is otherwise harmless.
443 PH/07 There was a bug in the dovecot authenticator such that the value of
444 $auth1 could be overwritten, and so not correctly preserved, after a
445 successful authentication. This usually meant that the value preserved by
446 the server_setid option was incorrect.
448 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
450 PH/09 Installed PCRE release 7.0.
452 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
453 run for batched SMTP input. It is now run at the start of every message
454 in the batch. While fixing this I discovered that the process information
455 (output by running exiwhat) was not always getting set for -bs and -bS
456 input. This is fixed, and it now also says "batched" for BSMTP.
458 PH/11 Added control=no_pipelining.
460 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
461 patch, slightly modified), and move the expansion of helo_data till after
462 the connection is made in the smtp transport (so it can use these
465 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
467 PH/14 Added log_selector = +pid.
469 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
471 PH/16 Add ${if forany and ${if forall.
473 PH/17 Added dsn_from option to vary the From: line in DSNs.
475 PH/18 Flush SMTP output before performing a callout, unless control =
476 no_callout_flush is set.
478 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
479 was true (the default) a successful delivery failed to delete the retry
480 item, thus causing premature timeout of the address. The bug is now
483 PH/20 Added hosts_avoid_pipelining to the smtp transport.
485 PH/21 Long custom messages for fakedefer and fakereject are now split up
486 into multiline reponses in the same way that messages for "deny" and
487 other ACL rejections are.
489 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
490 with slight modification.
492 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
493 draft, changing the syntax and factoring some duplicate code".
495 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
496 for deliveries of the second and subsequent messages over the same SMTP
499 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
500 ${reduce, with only minor "tidies".
502 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
504 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
505 expansion side effects.
507 PH/27 When a message times out after an over-quota error from an Exim-imposed
508 quota, the bounce message says "mailbox is full". This message was not
509 being given when it was a system quota that was exceeded. It now should
512 MH/03 Made $recipients available in local_scan(). local_scan() already has
513 better access to the recipient list through recipients_list[], but
514 $recipients can be useful in postmaster-provided expansion strings.
516 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
517 in the case of a MAIL command with additional options following the
518 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
519 were accidentally chopped off.
521 PH/29 SMTP synchronization checks are implemented when a command is read -
522 there is a check that no more input is waiting when there shouldn't be
523 any. However, for some commands, a delay in an ACL can mean that it is
524 some time before the response is written. In this time, more input might
525 arrive, invalidly. So now there are extra checks after an ACL has run for
526 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
527 pipelining has not been advertised.
529 PH/30 MH's patch to allow iscntrl() characters to be list separators.
531 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
532 returned in the SMTP response when smtp_return_error_details was false.
535 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
536 instead of the C I/O that was originally supplied, because problems were
539 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
540 Exim which did not show up earlier: it was assuming that a call to
541 SSL_CTX_set_info_callback() might give an error value. In fact, there is
542 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
543 was a macro that became an assignment, so it seemed to work. This has
544 changed to a proper function call with a void return, hence the compile
545 error. Exim's code has been fixed.
547 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
550 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
552 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
554 PH/37 If a message is not accepted after it has had an id assigned (e.g.
555 because it turns out to be too big or there is a timeout) there is no
556 "Completed" line in the log. When some messages of this type were
557 selected by exigrep, they were listed as "not completed". Others were
558 picked up by some special patterns. I have improved the selection
559 criteria to be more general.
561 PH/38 The host_find_failed option in the manualroute router can now be set
562 to "ignore", to completely ignore a host whose IP address cannot be
563 found. If all hosts are ignored, the behaviour is controlled by the new
564 host_all_ignored option.
566 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
567 homing or because of multiple MX records with /mx) generated more than
568 one IP address, and the following item turned out to be the local host,
569 all the secondary addresses of the first item were incorrectly removed
570 from the list, along with the local host and any following hosts (which
571 is what is supposed to happen).
573 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
574 whoever called Exim into the -H file. In the case of the daemon it was
575 behaving confusingly. When first started, it used values for whoever
576 started the daemon, but after a SIGHUP it used the Exim user (because it
577 calls itself on a restart). I have changed the code so that it now always
580 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
581 message are rejected with the same error (e.g. no authentication or bad
582 sender address), and a DATA command is nevertheless sent (as can happen
583 with PIPELINING or a stupid MUA), the error message that was given to the
584 RCPT commands is included in the rejection of the DATA command. This is
585 intended to be helpful for MUAs that show only the final error to their
588 PH/42 Another patch from the Sieve maintainer.
590 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
591 Eximstats - Fixed some broken HTML links and added missing column headers
593 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
594 columns for Rejects, Temp Rejects, Ham, and Spam rows.
596 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
598 PH/43 Yet another patch from the Sieve maintainer.
600 PH/44 I found a way to check for a TCP/IP connection going away before sending
601 the response to the final '.' that terminates a message, but only in the
602 case where the client has not sent further data following the '.'
603 (unfortunately, this is allowed). However, in many cases there won't be
604 any further data because there won't be any more messages to send. A call
605 to select() can be used: if it shows that the input is "ready", there is
606 either input waiting, or the socket has been closed. An attempt to read
607 the next input character can distinguish the two cases. Previously, Exim
608 would have sent an OK response which the client would never have see.
609 This could lead to message repetition. This fix should cure that, at
610 least in a lot of common cases.
612 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
613 advertised in response to EHLO.
619 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
620 fixed by 4.65/MH/01 (is this a record?) are fixed:
622 (i) An empty string was always treated as zero by the numeric comparison
623 operators. This behaviour has been restored.
625 (ii) It is documented that the numeric comparison operators always treat
626 their arguments as decimal numbers. This was broken in that numbers
627 starting with 0 were being interpreted as octal.
629 While fixing these problems I realized that there was another issue that
630 hadn't been noticed. Values of message_size_limit (both the global option
631 and the transport option) were treated as octal if they started with 0.
632 The documentation was vague. These values are now always treated as
633 decimal, and I will make that clear in the documentation.
639 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
640 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
643 MH/01 Don't check that the operands of numeric comparison operators are
644 integers when their expansion is in "skipping" mode (fixes bug
645 introduced by 4.64-PH/07).
647 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
648 child addresses, Exim now panics and dies. Previously, because the count
649 is held in a short int, deliveries were likely to be lost. As such a
650 large number of recipients for a single message is ridiculous
651 (performance will be very, very poor), I have chosen to impose a limit
652 rather than extend the field.
658 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
659 leftover -K file (the existence of which was triggered by #402).
660 While we were at it, introduced process PID as part of the -K
661 filename. This should rule out race conditions when creating
664 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
665 processing considerably. Previous code took too long for large mails,
666 triggering a timeout which in turn triggers #401.
668 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
669 in the DK code in transports.c. sendfile() is not really portable,
670 hence the _LINUX specificness.
672 TF/01 In the add_headers option to the mail command in an Exim filter,
673 there was a bug that Exim would claim a syntax error in any
674 header after the first one which had an odd number of characters
677 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
678 callout verification, Exim cached a "reject" for the entire domain. This
679 is correct for most verifications, but it is not correct for a recipient
680 verification with use_sender or use_postmaster set, because in that case
681 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
682 case of MAIL FROM:<> rejection from other early rejections (e.g.
683 rejection of HELO). When verifying a recipient using a non-null MAIL
684 address, the cache is ignored if it shows MAIL FROM:<> rejection.
685 Whatever the result of the callout, the value of the domain cache is
686 left unchanged (for any other kind of callout, getting as far as trying
687 RCPT means that the domain itself is ok).
689 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
692 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
693 manifest itself as EPIPE rather than ECONNECT. When tidying away a
694 session, the daemon ignores ECONNECT errors and logs others; it now
695 ignores EPIPE as well.
697 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
698 (quoted-printable decoding).
700 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
701 later the small subsequent patch to fix an introduced bug.
703 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
705 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
707 PH/08 An error is now given if message_size_limit is specified negative.
709 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
710 to be given (somewhat) arbitrary names.
712 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
715 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
716 miscellaneous code fixes
718 PH/10 Added the log_reject_target ACL modifier to specify where to log
721 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
722 hostname. This is wrong, because it relates to the incoming message (and
723 probably the interface on which it is arriving) and not to the outgoing
724 callout (which could be using a different interface). This has been
725 changed to use the value of the helo_data option from the smtp transport
726 instead - this is what is used when a message is actually being sent. If
727 there is no remote transport (possible with a router that sets up host
728 addresses), $smtp_active_hostname is used.
730 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
731 tweaks were necessary in order to get it to work (see also 21 below):
732 (a) The code assumed that strncpy() returns a negative number on buffer
733 overflow, which isn't the case. Replaced with Exim's string_format()
735 (b) There were several signed/unsigned issues. I just did the minimum
736 hacking in of casts. There is scope for a larger refactoring.
737 (c) The code used strcasecmp() which is not a standard C function.
738 Replaced with Exim's strcmpic() function.
739 (d) The code set only $1; it now sets $auth1 as well.
740 (e) A simple test gave the error "authentication client didn't specify
741 service in request". It would seem that Dovecot has changed its
742 interface. Fortunately there's a specification; I followed it and
743 changed what the client sends and it appears to be working now.
745 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
748 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
749 address A is aliased to B and C, where B exists and C does not. Without
750 -v the output is "A verified" because verification stops after a
751 successful redirection if more than one address is generated. However,
752 with -v the child addresses are also verified. Exim was outputting "A
753 failed to verify" and then showing the successful verification for C,
754 with its parentage. It now outputs "B failed to verify", showing B's
755 parentage before showing the successful verification of C.
757 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
758 look up a TXT record in a specific list after matching in a combined
761 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
762 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
763 they consult the DNS. I had assumed they would set it the way they
764 wanted; and indeed my experiments on Linux seem to show that in some
765 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
766 To be on the safe side, however, I have now made the interface to
767 host_find_byname() similar to host_find_bydns(), with an argument
768 containing the DNS resolver options. The host_find_byname() function now
769 sets these options at its start, just as host_find_bydns() does. The smtp
770 transport options dns_qualify_single and dns_search_parents are passed to
771 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
772 of host_find_byname() use the default settings of RES_DEFNAMES
773 (qualify_single) but not RES_DNSRCH (search_parents).
775 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
776 spool_read_header() do less string testing, by means of a preliminary
777 switch on the second character of optional "-foo" lines. (This is
778 overdue, caused by the large number of possibilities that now exist.
779 Originally there were few.) While I was there, I also converted the
780 str(n)cmp tests so they don't re-test the leading "-" and the first
781 character, in the hope this might squeeze out yet more improvement.
783 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
784 flag allowing group syntax was set by the header_syntax check but not
785 turned off, possible causing trouble later; (2) The flag was not being
786 set at all for the header_verify test, causing "group"-style headers to
787 be rejected. I have now set it in this case, and also caused header_
788 verify to ignore an empty address taken from a group. While doing this, I
789 came across some other cases where the code for allowing group syntax
790 while scanning a header line wasn't quite right (mostly, not resetting
791 the flag correctly in the right place). These bugs could have caused
792 trouble for malformed header lines. I hope it is now all correct.
794 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
795 with the "reply" argument non-NULL. The code, however (which originally
796 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
797 but it didn't always do it. This confused somebody who was copying the
798 code for some other use. I have removed all the tests.
800 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
801 feature that was used to support insecure browsers during the U.S. crypto
802 embargo. It requires special client support, and Exim is probably the
803 only MTA that supported it -- and would never use it because real RSA is
804 always available. This code has been removed, because it had the bad
805 effect of slowing Exim down by computing (never used) parameters for the
806 RSA_EXPORT functionality.
808 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
809 authenticator to fail if there's a tab character in the incoming data
810 (there should never be unless someone is messing about, as it's supposed
811 to be base64-encoded). Also added, on Timo's advice, the "secured" option
812 if the connection is using TLS or if the remote IP is the same as the
813 local IP, and the "valid-client-cert option" if a client certificate has
816 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
817 authenticators. This can be used for authorization after authentication
818 succeeds. (In the case of plaintext, it servers for both authentication
821 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
822 if any retry times were supplied.
824 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
825 connection, where there is no client IP address to check. In this
826 situation, the verify now always succeeds.
828 PH/25 Applied John Jetmore's -Mset patch.
830 PH/26 Added -bem to be like -Mset, but loading a message from a file.
832 PH/27 In a string expansion for a processed (not raw) header when multiple
833 headers of the same name were present, leading whitespace was being
834 removed from all of them, but trailing whitespace was being removed only
835 from the last one. Now trailing whitespace is removed from each header
836 before concatenation. Completely empty headers in a concatenation (as
839 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
840 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
842 PH/29 [Removed. This was a change that I later backed out, and forgot to
843 correct the ChangeLog entry (that I had efficiently created) before
844 committing the later change.]
846 PH/30 Exim was sometimes attempting to deliver messages that had suffered
847 address errors (4xx response to RCPT) over the same connection as other
848 messages routed to the same hosts. Such deliveries are always "forced",
849 so retry times are not inspected. This resulted in far too many retries
850 for the affected addresses. The effect occurred only when there were more
851 hosts than the hosts_max_try setting in the smtp transport when it had
852 the 4xx errors. Those hosts that it had tried were not added to the list
853 of hosts for which the message was waiting, so if all were tried, there
854 was no problem. Two fixes have been applied:
856 (i) If there are any address or message errors in an SMTP delivery, none
857 of the hosts (tried or untried) are now added to the list of hosts
858 for which the message is waiting, so the message should not be a
859 candidate for sending over the same connection that was used for a
860 successful delivery of some other message. This seems entirely
861 reasonable: after all the message is NOT "waiting for some host".
862 This is so "obvious" that I'm not sure why it wasn't done
863 previously. Hope I haven't missed anything, but it can't do any
864 harm, as the worst effect is to miss an optimization.
866 (ii) If, despite (i), such a delivery is accidentally attempted, the
867 routing retry time is respected, so at least it doesn't keep
868 hammering the server.
870 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
871 in ${readsocket because some servers need this prod.
873 PH/32 Added some extra debug output when updating a wait-xxx database.
875 PH/33 The hint "could be header name not terminated by colon", which has been
876 given for certain expansion errors for a long time, was not being given
877 for the ${if def:h_colon_omitted{... case.
879 PH/34 The spec says: "With one important exception, whenever a domain list is
880 being scanned, $domain contains the subject domain." There was at least
881 one case where this was not true.
883 PH/35 The error "getsockname() failed: connection reset by peer" was being
884 written to the panic log as well as the main log, but it isn't really
885 panic-worthy as it just means the connection died rather early on. I have
886 removed the panic log writing for the ECONNRESET error when getsockname()
889 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
890 runs only) independently of the message's sender address. This meant
891 that, if the 4xx error was in fact related to the sender, a different
892 message to the same recipient with a different sender could confuse
893 things. In particualar, this can happen when sending to a greylisting
894 server, but other circumstances could also provoke similar problems.
895 I have changed the default so that the retry time for these errors is now
896 based a combination of the sender and recipient addresses. This change
897 can be overridden by setting address_retry_include_sender=false in the
900 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
901 remote server are returned as part of bounce messages. This was not
902 happening for LMTP over a pipe (the lmtp transport), but now it is the
903 same for both kinds of LMTP.
905 PH/38 Despite being documented as not happening, Exim was rewriting addresses
906 in header lines that were in fact CNAMEs. This is no longer the case.
908 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
909 and queue runs started by the daemon processed all messages. This has
910 been fixed so that -R and -S can now usefully be given with -q<time>.
912 PH/40 Import PCRE release 6.7 (fixes some bugs).
914 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
916 PH/42 Give an error if -q is specified more than once.
918 PH/43 Renamed the variables $interface_address and $interface_port as
919 $received_ip_address and $received_port, to make it clear that these
920 values apply to message reception, and not to the outgoing interface when
921 a message is delivered. (The old names remain recognized, of course.)
923 PH/44 There was no timeout on the connect() call when using a Unix domain
924 socket in the ${readsocket expansion. There now is.
926 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
927 be meaningful with "accept".
929 SC/01 Eximstats V1.43
930 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
932 SC/02 Eximstats V1.44
933 Use a glob alias rather than an array ref in the generated
934 parser. This improves both readability and performance.
936 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
937 Collect SpamAssassin and rejection statistics.
938 Don't display local sender or destination tables unless
939 there is data to show.
940 Added average volumes into the top table text output.
942 SC/04 Eximstats V1.46
943 Collect data on the number of addresses (recipients)
944 as well as the number of messages.
946 SC/05 Eximstats V1.47
947 Added 'Message too big' to the list of mail rejection
948 reasons (thanks to Marco Gaiarin).
950 SC/06 Eximstats V1.48
951 Mainlog lines which have GMT offsets and are too short to
952 have a flag are now skipped.
954 SC/07 Eximstats V1.49 (Alain Williams)
955 Added the -emptyok flag.
957 SC/08 Eximstats V1.50
958 Fixes for obtaining the IP address from reject messages.
960 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
961 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
962 whitesspace changes from 4.64-PH/27
964 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
967 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
968 are found, allow negative numbers in numeric criteria)
970 JJ/06 exipick.20061117.2, added new $message_body_missing variable
972 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
973 to match changes made in 4.64-PH/43
975 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
977 PH/47 Put in an explicit test for a DNS lookup of an address record where the
978 "domain" is actually an IP address, and force a failure. This locks out
979 those revolvers/nameservers that support "A-for-A" lookups, in
980 contravention of the specifications.
982 PH/48 When a host name was looked up from an IP address, and the subsequent
983 forward lookup of the name timed out, the host name was left in
984 $sender_host_name, contrary to the specification.
986 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
987 restricted to single-key lookups, Exim was not diagnosing an error if
988 * or *@ was used with a query-style lookup.
990 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
992 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
993 long ago, but noone interested enough thought of it. Let's just say that
994 the "1.1" means that there are some new functions that weren't there at
995 some point in the past.
997 PH/51 Error processing for expansion failure of helo_data from an smtp
998 transport during callout processing was broken.
1000 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1001 tested/used via the -bh/-bhc/-bs options.
1003 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1004 bug, fixed in subsequent PCRE releases).
1006 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1007 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1009 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1015 SC/01 Use a glob alias rather than an array ref in eximstats generated
1016 parser. This improves both readability and performance.
1018 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1019 Don't display local sender or destination tables in eximstats unless
1020 there is data to show.
1021 Added average volumes into the eximstats top table text output.
1023 SC/03 Collect data on the number of addresses (recipients) as well
1024 as the number of messages in eximstats.
1026 TF/01 Correct an error in the documentation for the redirect router. Exim
1027 does (usually) call initgroups() when daemonizing.
1029 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1030 with consistent privilege compared to when running as a daemon.
1032 TF/03 Note in the spec that $authenticated_id is not set for local
1033 submissions from trusted users.
1035 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1036 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1038 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1039 by adding some example configuration directives to the default
1040 configuration file. A little bit of work is required to uncomment the
1041 directives and define how usernames and passwords are checked, but
1042 there is now a framework to start from.
1044 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1045 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1046 without this. I don't know how relevant this is to other LDAP libraries.
1048 PH/02 Add the verb name to the "unknown ACL verb" error.
1050 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1052 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1054 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1055 directory not expanded when it should be if an expanded home directory
1056 was set for the address (which is overridden by the transport).
1058 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1061 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1062 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1063 because it is too late at that time, and has no effect.
1065 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1066 security issue with \' (bugzilla #107). I could not use the
1067 PQescapeStringConn() function, because it needs a PGconn value as one of
1070 PH/08 When testing addresses using -bt, indicate those final addresses that
1071 are duplicates that would not cause an additional delivery. At least one
1072 person was confused, thinking that -bt output corresponded to deliveries.
1073 (Suppressing duplicates isn't a good idea as you lose the information
1074 about possibly different redirections that led to the duplicates.)
1076 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1077 systems where poll() doesn't work, in particular OS X.
1079 PH/10 Added more information to debugging output for retry time not reached.
1081 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1082 operations in malware.c.
1084 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1087 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1088 syslog_duplication set false, log lines that would normally be written
1089 both the the main log and to the reject log were not written to syslog at
1092 PH/14 In the default configuration, change the use of "message" in ACL warn
1093 statements to "add_header".
1095 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1096 not followed by a command (e.g. "seen endif").
1098 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1099 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1102 PH/17 Added extra conditions to the default value of delay_warning_condition
1106 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1107 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1108 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1111 The Auto-Submitted: and various List- headers are standardised, whereas I
1112 don't think Precedence: ever was.
1114 PH/18 Refactored debugging code in route_finduser() to show more information,
1115 in particular, the error code if getpwnam() issues one.
1117 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1118 This is apparently needed in addition to the PH/07 change above to avoid
1119 any possible encoding problems.
1121 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1122 but not after initializing Perl.
1124 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1125 output them only if debugging. By default they are written stderr,
1126 apparently, which is not desirable.
1128 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1131 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1134 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1136 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1137 authenticated or an ident call has been made. Suppress the default
1138 values for $authenticated_id and $authenticated_sender (but permit -oMai
1139 and -oMas) when testing with -bh.
1141 PH/24 Re-jigged the order of the tests in the default configuration so that the
1142 tests for valid domains and recipients precede the DNS black list and CSA
1143 tests, on the grounds that those ones are more expensive.
1145 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1146 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1147 This bug exists in every version of Exim that I still have, right back to
1150 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1151 However, an attempt to turn on case-sensitivity in a regex key by
1152 including (?-i) didn't work because the subject string was already
1153 lowercased, and the effects were non-intuitive. It turns out that a
1154 one-line patch can be used to allow (?-i) to work as expected.
1160 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1161 other effects) broke the use of negated acl sub-conditions.
1163 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1166 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1167 "Deny" causes Exim to reject the incoming connection with a 554 error.
1168 Unfortunately, if there is a major crisis, such as a disk failure,
1169 tcp-wrappers gives "deny", whereas what one would like would be some
1170 kind of temporary error. A kludge has been added to help with this.
1171 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1172 554 error is used if errno is still zero or contains ENOENT (which occurs
1173 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1176 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1178 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1179 errors. Otherwise a message that provokes a temporary error (when other
1180 messages do not) can cause a whole host to time out.
1182 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1183 addresses were routed directly to files or pipes from a redirect router.
1184 File deliveries just didn't batch; pipe deliveries might have suffered
1187 PH/06 A failure to get a lock for a hints database would erroneously always say
1188 "Failed to get write lock", even when it was really a read lock.
1190 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1191 of 0600. This has been changed to use the value of the lockfile_mode
1192 option (which defaults to 0600).
1194 PH/08 Applied small patch from the Sieve maintainer.
1196 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1197 folder from quota calculations, a direct delivery into this folder messed
1198 up the contents of the maildirsize file. This was because the regex was
1199 used only to exclude .Trash (or whatever) when the size of the mailbox
1200 was calculated. There was no check that a delivery was happening into an
1201 excluded directory. This bug has been fixed by ignoring all quota
1202 processing for deliveries into excluded directories.
1204 PH/10 Added the maildirfolder_create_regex option to appendfile.
1210 PH/01 The code for finding all the local interface addresses on a FreeBSD
1211 system running IPv6 was broken. This may well have applied to all BSD
1212 systems, as well as to others that have similar system calls. The broken
1213 code found IPv4 interfaces correctly, but gave incorrect values for the
1214 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1215 that it would not match correctly against @[] and not recognize the IPv6
1218 PH/02 The ipliteral router was not recognizing addresses of the form user@
1219 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1221 PH/03 Added disable_ipv6.
1223 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1224 decoded form, because it is most often used to construct To: headers
1225 lines in autoreplies, and the decoded form may well be syntactically
1226 invalid. However, $reply_address has leading white space removed, and all
1227 newlines turned into spaces so that the autoreply transport does not
1230 PH/05 If group was specified without a user on a router, and no group or user
1231 was specified on a transport, the group from the router was ignored.
1233 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1234 for visible compile-time settings that can be used to change these
1235 numbers, for those that want even more. Backwards compatibility with old
1236 spool files has been maintained. However, going back to a previous Exim
1237 release will lost any variables that are in spool files.
1239 PH/07 Two small changes when running in the test harness: increase delay when
1240 passing a TCP/IP connection to a new process, in case the original
1241 process has to generate a bounce, and remove special handling of
1242 127.0.0.2 (sic), which is no longer necessary.
1244 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1245 be the same on different OS.
1247 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1250 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1251 whether --show-vars was specified or not
1253 JJ/02 exipick: Added support for new ACL variable spool format introduced
1256 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1257 syntactically invalid From: or Reply-to: line, and a filter used this to
1258 generate an autoreply, and therefore failed to obtain an address for the
1259 autoreply, Exim could try to deliver to a non-existent relative file
1260 name, causing unrelated and misleading errors. What now happens is that
1261 it logs this as a hard delivery error, but does not attempt to create a
1264 PH/11 The exinext utility has a -C option for testing purposes, but although
1265 the given file was scanned by exinext itself; it wasn't being passed on
1266 when Exim was called.
1268 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1269 an end-of-file indication when reading a command response.
1271 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1272 compiled. In many other places in Exim, IPv6 addresses are always
1273 recognized, so I have changed this. It also means that IPv4 domain
1274 literals of the form [IPV4:n.n.n.n] are now always recognized.
1276 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1277 used if the router is not running as root, for example, when verifying at
1278 ACL time, or when using -bh. The debugging output from this situation was
1279 non-existent - all you got was a failure to exec. I have made two
1282 (a) Failures to set uid/gid, the current directory, or a process leader
1283 in a subprocess such as that created by queryprogram now generate
1284 suitable debugging ouput when -d is set.
1286 (b) The queryprogram router detects when it is not running as root,
1287 outputs suitable debugging information if -d is set, and then runs
1288 the subprocess without attempting to change uid/gid.
1290 PH/15 Minor change to Makefile for building test_host (undocumented testing
1293 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1294 additional section of a DNS packet that returns MX or SRV records.
1295 Instead, it always explicitly searches for A/AAAA records. This avoids
1296 major problems that occur when a DNS server includes only records of one
1297 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1298 fixed another bug: if SRV records were looked up and the corresponding
1299 address records were *not* found in the additional section, the port
1300 values from the SRV records were lost.
1302 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1303 using the correct key (the original address) when searching the retry
1304 rules in order to find which one to use for generating the retry hint.
1306 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1307 adding the default one. Similarly, if it contains a Reply-To: header, the
1308 errors_reply_to option, if set, is not used.
1310 PH/19 When calculating a retry time, Exim used to measure the "time since
1311 failure" by looking at the "first failed" field in the retry record. Now
1312 it does not use this if it is later than than the arrival time of the
1313 message. Instead it uses the arrival time. This makes for better
1314 behaviour in cases where some deliveries succeed, thus re-setting the
1315 "first failed" field. An example is a quota failure for a huge message
1316 when small messages continue to be delivered. Without this change, the
1317 "time since failure" will always be short, possible causing more frequent
1318 delivery attempts for the huge message than are intended.
1319 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1321 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1322 $1, $2, $3) because the numerical variables can be reset during some
1323 expansion items (e.g. "match"), thereby losing the authentication data.
1325 PH/21 Make -bV show the size of off_t variables so that the test suite can
1326 decide whether to run tests for quotas > 2G.
1328 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1329 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1330 filecount value is greater than 2G or if a quota value is greater than 2G
1331 on a system where the size of off_t is not greater than 4, a panic error
1334 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1335 never match. The debug and -bh output now contains an explicit error
1336 message indicating a malformed IPv4 address or mask.
1338 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1339 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1340 PH/23 above applies.
1342 PH/25 Do not write to syslog when running in the test harness. The only
1343 occasion when this arises is a failure to open the main or panic logs
1344 (for which there is an explicit test).
1346 PH/26 Added the /no_tell option to "control=freeze".
1348 PH/27 If a host name lookup failed very early in a connection, for example, if
1349 the IP address matched host_lookup and the reverse lookup yielded a name
1350 that did not have a forward lookup, an error message of the form "no IP
1351 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1352 could be logged. Now it outputs the IP address instead of "NULL".
1354 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1355 allows the sender and the authenticated sender to be set when
1356 submitting a message from within Exim. Since child_open_exim() is
1357 documented for local_scan(), the new function should be too.
1359 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1360 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1361 results in an empty string is now treated as unset.
1363 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1365 PH/31 Added sender_verify_fail logging option.
1367 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1368 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1369 tidied the source and removed it altogether.
1371 PH/33 When a queue run was abandoned because the load average was too high, a
1372 log line was always written; now it is written only if the queue_run log
1373 selector is set. In addition, the log line for abandonment now contains
1374 information about the queue run such as the pid. This is always present
1375 in "start" and "stop" lines but was omitted from the "abandon" line.
1377 PH/34 Omit spaces between a header name and the colon in the error message that
1378 is given when verify = headers_syntax fails (if there are lots of them,
1379 the message gets confusing).
1381 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1382 names, as there are now some PTR records that contain slashes. This check
1383 is only to protect against broken name servers that fall over on strange
1384 characters, so the fact that it applies to all lookups doesn't matter.
1386 PH/36 Now that the new test suite is complete, we can remove some of the
1387 special code in Exim that was needed for the old test suite. For example,
1388 sorting DNS records because real resolvers return them in an arbitrary
1389 order. The new test suite's fake resolver always returns records in the
1392 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1393 bounces) except when queue_only is set, to avoid logging races between
1394 the different processes.
1396 PH/38 Panic-die if .include specifies a non-absolute path.
1398 PH/39 A tweak to the "H" retry rule from its user.
1400 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1401 a label. They prevented compilation on older perls.
1403 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1404 a warning to be raised on newish perls.
1406 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1407 on queue. Changes to match documented behaviour of showing count of
1408 messages matching specified criteria.
1410 PH/40 Changed the default ident timeout from 30s to 5s.
1412 PH/41 Added support for the use of login_cap features, on those BSD systems
1413 that have them, for controlling the resources used by pipe deliveries.
1415 PH/42 The content-scanning code uses fopen() to create files in which to put
1416 message data. Previously it was not paying any attention to the mode of
1417 the files. Exim runs with umask(0) because the rest of the code creates
1418 files with open(), and sets the required mode explicitly. Thus, these
1419 files were ending up world-writeable. This was not a big issue, because,
1420 being within the spool directory, they were not world-accessible. I have
1421 created a function called modefopen, which takes an additional mode
1422 argument. It sets umask(777), creates the file, chmods it to the required
1423 mode, then resets the umask. All the relevant calls to fopen() in the
1424 content scanning code have been changed to use this function.
1426 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1427 to 24 hours. This avoids potential overflow problems when processing G
1428 and H retry rules. I suspect nobody ever tinkers with this value.
1430 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1432 PH/45 When the plaintext authenticator is running as a client, the server's
1433 challenges are checked to ensure they are valid base64 strings. By
1434 default, the authentication attempt is cancelled if an invalid string is
1435 received. Setting client_ignore_invalid_base64 true ignores these errors.
1436 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1437 they are received. Thus, the responses can be made to depend on the
1438 challenges. If an invalid string is ignored, an empty string is placed in
1441 PH/46 Messages that are created by the autoreply transport now contains a
1442 References: header, in accordance with RFCs 2822 and 3834.
1444 PH/47 Added authenticated_sender_force to the smtp transport.
1446 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1448 PH/49 Installed latest patch from the Sieve maintainer.
1450 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1451 was also set, the appendfile transport was unnecessarily scanning a
1452 directory of message files (e.g. for maildir delivery) to find the count
1453 of files (along with the size), even though it did not need this
1454 information. It now does the scan only if it needs to find either the
1455 size of the count of files.
1457 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1459 PH/52 Two bugs concerned with error handling when the smtp transport is
1462 (i) Exim was not creating retry information for temporary errors given
1463 for individual recipients after the DATA command when the smtp transport
1464 was used in LMTP mode. This meant that they could be retried too
1465 frequently, and not timed out correctly.
1467 (ii) Exim was setting the flag that allows error details to be returned
1468 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1469 recipients that were returned after the DATA command.
1471 PH/53 This is related to PH/52, but is more general: for any failing address,
1472 when detailed error information was permitted to be returned to the
1473 sender, but the error was temporary, then after the final timeout, only
1474 "retry timeout exceeded" was returned. Now it returns the full error as
1475 well as "retry timeout exceeded".
1477 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1478 do this, and (what is worse) MTAs that accept it.
1480 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1481 will now be deprecated.
1483 PH/56 New os.c-cygwin from the Cygwin maintainer.
1485 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1486 formats (previously only available in exim formats via -bpr, -bpru,
1487 and -bpra. Now also available in native and exiqgrep formats)
1489 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1490 with very large, slow to parse queues
1492 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1494 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1496 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1497 responses to authentication challenges, though it was showing the
1498 challenges; (ii) I've removed the CR characters from the debug output for
1501 PH/58 Allow for the insertion of a newline as well as a space when a string
1502 is turned into more than one encoded-word during RFC 2047 encoding. The
1503 Sieve code now uses this.
1505 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1506 data_4xx, lost_connection, tls_required.
1508 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1509 message was being sent as an SMTP response.
1511 PH/61 Add -l and -k options to exicyclog.
1513 PH/62 When verifying, if an address was redirected to one new address, so that
1514 verification continued, and the new address failed or deferred after
1515 having set something in $address_data, the value of $address_data was not
1516 passed back to the ACL. This was different to the case when no
1517 redirection occurred. The value is now passed back in both cases.
1519 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1520 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1521 use login_cap.h, so on its own it isn't the distinguishing feature. The
1522 new name refers directly to the setclassresources() function.
1524 PH/65 Added configuration files for NetBSD3.
1526 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1528 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1529 is preferred over IPv4.
1531 PH/68 The bounce_return_message and bounce_return_body options were not being
1532 honoured for bounces generated during the reception of non-SMTP messages.
1533 In particular, this applied to messages rejected by the ACL. This bug has
1534 been fixed. However, if bounce_return_message is true and bounce_return_
1535 body is false, the headers that are returned for a non-SMTP message
1536 include only those that have been read before the error was detected.
1537 (In the case of an ACL rejection, they have all been read.)
1539 PH/69 The HTML version of the specification is now built in a directory called
1540 spec_html instead of spec.html, because the latter looks like a path with
1541 a MIME-type, and this confuses some software.
1543 PH/70 Catch two compiler warnings in sieve.c.
1545 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1546 function verify_get_ident() calls ip_connect() to connect a socket, but
1547 if the "connect()" function timed out, ip_connect() used to close the
1548 socket. However, verify_get_ident() also closes the socket later, and in
1549 between Exim writes to the log, which may get opened at this point. When
1550 the socket was closed in ip_connect(), the log could get the same file
1551 descriptor number as the socket. This naturally causes chaos. The fix is
1552 not to close the socket in ip_connect(); the socket should be closed by
1553 the function that creates it. There was only one place in the code where
1554 this was missing, in the iplookup router, which I don't think anybody now
1555 uses, but I've fixed it anyway.
1557 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1558 well as to direct DNS lookups. Otherwise the handling of names in host
1559 lists is inconsistent and therefore confusing.
1565 PH/01 Two changes to the default runtime configuration:
1567 (1) Move the checks for relay_from_hosts and authenticated clients from
1568 after to before the (commented out) DNS black list checks.
1570 (2) Add control=submission to the relay_from_hosts and authenticated
1571 clients checks, on the grounds that messages accepted by these
1572 statements are most likely to be submissions.
1574 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1576 (1) Generate an error if the third argument for the ${prvs expansion is
1579 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1582 (3) Reset the variables that are obtained from the first argument of
1583 ${prvscheck and used in the second argument before leaving the code,
1584 because their memory is reclaimed, so using them afterwards may do
1587 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1588 one (it's much easier than Tom thought :-).
1590 (5) Because of (4), we can now allow for the use of $prvscheck_result
1591 inside the third argument.
1593 PH/03 For some reason, the default setting of PATH when running a command from
1594 a pipe transport was just "/usr/bin". I have changed it to
1597 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1598 anything to be listed in the output from -bV.
1600 PH/05 When a filter generated an autoreply, the entire To: header line was
1601 quoted in the delivery log line, like this:
1603 => >A.N.Other <ano@some.domain> <original@ddress> ...
1605 This has been changed so that it extracts the operative address. There
1606 may be more than one such address. If so, they are comma-separated, like
1609 => >ano@some.domain,ona@other.domain <original@ddress> ...
1611 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1612 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1613 not being looked up in the rDNS to get a host name, Exim was showing the
1614 IP address twice in Received: lines, even though the IP addresses were
1615 identical. For example:
1617 Received: from [1.2.3.4] (helo=[1.2.3.4])
1619 However, if the real host name was known, it was omitting the HELO data
1620 if it matched the actual IP address. This has been tidied up so that it
1621 doesn't show the same IP address twice.
1623 PH/07 When both +timestamp and +memory debugging was on, the value given by
1624 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1625 called by the debug printing, thereby overwriting the timestamp buffer.
1626 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1628 PH/08 When the original message was included in an autoreply transport, it
1629 always said "this is a copy of the message, including all the headers",
1630 even if body_only or headers_only was set. It now gives an appropriate
1633 PH/09 Applied a patch from the Sieve maintainer which:
1635 o fixes some comments
1636 o adds the (disabled) notify extension core
1637 o adds some debug output for the result of if/elsif tests
1638 o points to the current vacation draft in the documentation
1639 and documents the missing references header update
1643 o fixes a bug in processing the envelope test (when testing
1644 multiple envelope elements, the last element determinted the
1647 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1648 Electronic Mail") by including:
1650 Auto-submitted: auto-generated
1652 in the messages that it generates (bounce messages and others, such as
1653 warnings). In the case of bounce messages for non-SMTP mesages, there was
1654 also a typo: it was using "Auto_submitted" (underscore instead of
1655 hyphen). Since every message generated by Exim is necessarily in response
1656 to another message, thes have all been changed to:
1658 Auto-Submitted: auto-replied
1660 in accordance with these statements in the RFC:
1662 The auto-replied keyword:
1664 - SHOULD be used on messages sent in direct response to another
1665 message by an automatic process,
1667 - MUST NOT be used on manually-generated messages,
1669 - MAY be used on Delivery Status Notifications (DSNs) and Message
1670 Disposition Notifications (MDNs),
1672 - MUST NOT be used on messages generated by automatic or periodic
1673 processes, except for messages which are automatic responses to
1676 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1677 to the default Received: header definition.
1679 PH/12 Added log selector acl_warn_skipped (default on).
1681 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1682 variables because (a) they are in the wrong storage pool and (b) even if
1683 they were copied, it wouldn't work properly because of the caching.
1685 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1686 checking when decoding. Apparently there are clients that generate
1687 overlong encoded strings. Why am I not surprised?
1689 PH/15 If the first argument of "${if match_address" was not empty, but did not
1690 contain an "@" character, Exim crashed. Now it writes a panic log message
1691 and treats the condition as false.
1693 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1695 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1696 extension "envelope-auth". The code is finished and in agreement with
1697 other implementations, but there is no documentation so far and in fact,
1698 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1699 not changing the active code.
1701 Print executed "if" and "elsif" statements when debugging is used. This
1702 helps a great deal to understand what a filter does.
1704 Document more things not specified clearly in RFC3028. I had all this
1705 sorted out, when out of a sudden new issues came to my mind. Oops."
1707 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1710 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1711 canonical form (as documented). However, after a host name lookup from
1712 the IP address, check_host() was doing a simple string comparison with
1713 addresses acquired from the DNS when checking that the found name did
1714 have the original IP as one of its addresses. Since any found IPv6
1715 addresses are likely to be in abbreviated form, the comparison could
1716 fail. Luckily, there already exists a function for doing the comparison
1717 by converting both addresses to binary, so now that is used instead of
1718 the text comparison.
1720 PH/20 There was another similar case to PH/19, when a complete host name was
1721 given in a host list; looking up its IP address could give an abbreviated
1722 form, whereas the current host's name might or might not be abbreviated.
1723 The same fix has been applied.
1729 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1730 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1733 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1734 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1736 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1738 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1739 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1740 Also, for "Auto-Submitted", treat anything other than "no" as
1741 non-personal, in accordance with RFC 3834. (Previously it treated
1742 anything starting "auto-" as non-personal.)
1744 TF/01 The control=submission/name=... option had a problem with syntax
1745 errors if the name included a slash character. The /name= option
1746 now slurps the rest of the string, so it can include any characters
1747 but it must come last in the list of options (after /sender_retain
1750 PH/05 Some modifications to the interface to the fake nameserver for the new
1758 TK/01 Added the "success_on_redirect" address verification option. See
1759 NewStuff for rationale and an example.
1761 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1763 PH/02 Patch to exigrep to allow it to work on syslog lines.
1765 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1766 fread() to skip over the body file's header line, because in Cygwin the
1767 header line is locked and is inaccessible.
1769 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1770 co-exist for some time) to make it clear that it is the Exim ID that is
1771 referenced, not the Message-ID: header line.
1773 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1774 string_format() function, because snprintf() does not exist on all
1777 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1778 ${stat: expansion item.
1780 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1781 protocol synchronization error", to keep the pedants happy.
1783 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1784 well as for IRIX systems, when gcc is being used. See the host.c source
1787 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1789 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1792 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1793 transport and to the smtp transport in LMTP mode.
1795 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1797 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1798 run a filter in a subprocess. This could lead to confusion in subsequent
1799 lookups in the parent process. There should also be a search_tidyup() at
1800 the end of the subprocess.
1802 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1803 only if the host matched helo_try_verify_hosts, which caused the
1804 verification to occur when the EHLO/HELO command was issued. The ACL just
1805 tested the remembered result. Now, if a previous verification attempt has
1806 not happened, "verify = helo" does it there and then.
1808 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1810 TK/03 Fix log output including CR from clamd.
1812 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1813 exist provoked a memory error which could cause a segfault.
1815 PH/15 Installed PCRE 6.2
1817 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1819 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1820 of the problem. Specifically, suggested +O2 rather than +O1 for the
1823 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1825 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1826 record, the port was not correctly logged when the outgoing_port log
1827 selector was set (it logged the transort's default port).
1829 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1830 fallback_hosts, and "hosts" in the smtp transport.
1832 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1833 host errors such as "Connection refused".
1835 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1836 authentication with radiusclient 0.4.9:
1838 - Error returned from rc_read_config was caught wrongly
1839 - Username/password not passed on to radius server due to wrong length.
1841 The presumption is that some radiusclient API changes for 4.51/PH/17
1842 were not taken care of correctly. The code is still untested by me (my
1843 Linux distribution still has 0.3.2 of radiusclient), but it was
1844 contributed by a Radius user.
1846 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1847 expanding the "port" option of the smtp transport.
1849 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1850 while reading a MIME header. Thanks to Tom Hughes for a patch.
1852 PH/24 Include config.h inside local_scan.h so that configuration settings are
1855 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1856 that in an ACL for RCPT (for example), you can examine exactly what was
1859 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1860 commands, but it was not correctly comparing the address with the actual
1861 client host address. Thus, it would show the EHLO address in Received:
1862 header lines when this was not necessary.
1864 PH/27 Added the % operator to ${eval:}.
1866 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1867 it should be ignoring failures (because with -C, for example, it has lost
1868 privilege). It wasn't ignoring creation failures other than "already
1871 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1874 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1875 because an input line was too long, either on its own, or by virtue of
1876 too many continuations, the temporary file was not being removed, and the
1877 return code was incorrect.
1879 PH/31 Missing "BOOL" in function definition in filtertest.c.
1881 PH/32 Applied Sieve patches from the maintainer.
1883 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1885 PH/33 Added "verify = not_blind".
1887 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1888 Local/Makefile (with some defaults set). These are used in built scripts
1889 such as exicyclog, but they have never been used in the exim_install
1890 script (though there are many overriding facilities there). I have
1891 arranged that the exim_install script now takes note of these two
1894 PH/35 Installed configuration files for Dragonfly.
1896 PH/36 When a locally submitted message by a trusted user did not contain a
1897 From: header, and the sender address was obtained from -f or from an SMTP
1898 MAIL command, and the trusted user did not use -F to supply a sender
1899 name, $originator_name was incorrectly used when constructing a From:
1900 header. Furthermore, $originator_name was used for submission mode
1901 messages from external hosts without From: headers in a similar way,
1902 which is clearly wrong.
1904 PH/37 Added control=suppress_local_fixups.
1906 PH/38 When log_selector = +received_sender was set, and the addition of the
1907 sender made the log line's construction buffer exactly full, or one byte
1908 less than full, an overflow happened when the terminating "\n" was
1911 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1912 when the result of a list match is failure because a DNS lookup failed.
1914 PH/40 RM_COMMAND is now used in the building process.
1916 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1917 the "build-* directories that it finds.
1919 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1920 address in a domain literal was a prefix of an interface address.
1922 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1923 when verifying a sender address, unless rewrite_headers is false.
1925 PH/44 Wrote a long comment about why errors_to addresses are verified as
1926 recipients, not senders.
1928 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1929 the ratelimit ACL was added.
1931 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1933 PH/46 Added extra information about PostgreSQL errors to the error string.
1935 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1936 avoiding the need to install special zones in a real server. This is
1937 backwards compatible; if it can't find the fake resolver, it drops back.
1938 Thus, both old and new test suites can be run.
1940 TF/02 Added util/ratelimit.pl
1942 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1943 clock is set back in time.
1945 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1946 Candler <B.Candler@pobox.com>.
1948 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1949 OK for addresses that are the result of redirections.
1951 PH/48 A number of further additions for the benefit of the new test suite,
1952 including a fake gethostbyname() that interfaces to the fake DNS resolver
1955 TF/06 The fix for widen_domains has also been applied to qualify_single and
1956 search_parents which are the other dnslookup options that can cause
1959 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1962 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1964 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1965 service" if it encountered an MX record with an empty target hostname.
1966 The message is now "an MX or SRV record indicated no SMTP service".
1968 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1969 if the DNS of the sending site is misconfigured. This is quite a
1970 common situation. This change restores the behaviour of treating a
1971 helo verification defer as a failure.
1973 PH/51 If self=fail was set on a router, the bounce message did not include the
1974 actual error message.
1980 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1982 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1983 command itself ended in error, the underlying message about the transport
1984 filter timeout was being overwritten with the pipe command error. Now the
1985 underlying error message should be appended to the second error message.
1987 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1989 PH/02 Reduce the amount of output that "make" produces by default. Full output
1990 can still be requested.
1992 PH/03 The warning log line about a condition test deferring for a "warn" verb
1993 was being output only once per connection, rather than after each
1994 occurrence (because it was using the same function as for successful
1995 "warn" verbs). This seems wrong, so I have changed it.
1997 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1998 it should not have, which might have caused a crash in the right
1999 circumstances, but probably never did.
2001 PH/04 Installed a modified version of Tony Finch's patch to make submission
2002 mode fix the return path as well as the Sender: header line, and to
2003 add a /name= option so that you can make the user's friendly name appear
2006 TF/03 Added the control = fakedefer ACL modifier.
2008 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2009 Mark Lowes for thorough testing.
2011 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2013 TK/03 Merged latest SRS patch from Miles Wilton.
2015 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2016 with the definition in sysexits.h (which is #included earlier).
2017 Fortunately, Exim does not actually use EX_OK. The code used to try to
2018 preserve the sysexits.h value, by assumimg that macro definitions were
2019 scanned for macro replacements. I have been disabused of this notion,
2020 so now the code just undefines EX_OK before #including unistd.h.
2022 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2023 in the smtp transport. When a block could not be written in a single
2024 write() function, the timeout was being re-applied to each part-write.
2025 This seems wrong - if the receiver was accepting one byte at a time it
2026 would take for ever. The timeout is now adjusted when this happens. It
2027 doesn't have to be particularly precise.
2029 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2030 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2032 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2033 without a domain if the check to <postmaster@domain> fails.
2035 SC/01 Eximstats: added -xls and the ability to specify output files
2036 (patch written by Frank Heydlauf).
2038 SC/02 Eximstats: use FileHandles for outputing results.
2040 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2042 SC/04 Eximstats: fixed display of large numbers with -nvr option
2044 SC/05 Eximstats: fixed merging of reports with empty tables.
2046 SC/06 Eximstats: added the -include_original_destination flag
2048 SC/07 Eximstats: removed tabs and trailing whitespace.
2050 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2052 TK/06 MBOX spool code: Add real "From " MBOX separator line
2053 so the .eml file is really in mbox format (even though
2054 most programs do not really care). Patch from Alex Miller.
2056 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2057 The latter is generated from $received_to and is only set if the
2058 message has one envelope recipient. SA can use these headers,
2059 obviously out-of-the-box. Patch from Alex Miller.
2061 PH/08 The ${def test on a variable was returning false if the variable's
2062 value was "0", contrary to what the specification has always said!
2063 The result should be true unless the variable is empty.
2065 PH/09 The syntax error of a character other than { following "${if
2066 def:variable_name" (after optional whitespace) was not being diagnosed.
2067 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2068 accidental colon was present, for example, could give incorrect results.
2070 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2071 result is used (not including appendfile, where other changes are about
2074 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2075 This involved changing a lot of size variables from int to off_t. It
2076 should work with maildirs and everything.
2078 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2079 spamd dying while we are connected to it.
2081 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2084 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2085 function for BDB 4.3.
2087 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2089 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2090 the sources for PCRE have been re-arranged and more files are now
2093 PH/15 The code I had for printing potentially long long variables in PH/11
2094 above was not the best (it lost precision). The length of off_t variables
2095 is now inspected at build time, and an appropriate printing format (%ld
2096 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2097 to be "long long int" or "long int". This is needed for the internal
2098 formatting function string_vformat().
2100 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2101 the configuration file to be ":syslog", then the script "guesses" where
2102 the logs files are, rather than using the compiled in default. In our
2103 case the guess is not the same as the compiled default, so the script
2104 suddenly stopped working when I started to use syslog. The patch checks
2105 to see if log_file_path is "". If so, it attempts to read it from exim
2106 with no configuration file to get the compiled in version, before it
2107 falls back to the previous guessing code."
2109 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2110 implementing BATV in an Exim configuration. See NewStuff for the gory
2113 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2114 Makefile that are specific to HP-UX.
2116 PH/18 If the "use_postmaster" option was set for a recipient callout together
2117 with the "random" option, the postmaster address was used as the MAIL
2118 FROM address for the random test, but not for the subsequent recipient
2119 test. It is now used for both.
2121 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2122 patch removes a few documentation additions to RFC 3028, because the
2123 latest draft now contains them. It adds the new en;ascii-case comparator
2124 and a new error check for 8bit text in MIME parts. Comparator and
2125 require names are now matched exactly. I enabled the subaddress
2126 extension, but it is not well tested yet (read: it works for me)."
2128 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2129 rework some of the code of TK/09 above to avoid the hardwired use of
2130 "%lld" and "long long". Replaced the call to snprintf() with a call to
2133 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2134 records point to non-existent hosts", "retry timeout exceeded", and
2135 "retry time not reached for any host after a long failure period".
2137 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2138 experimental DomainKeys support:
2140 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2141 (2) On an error such as an illegally used "control", the wrong name for
2142 the control was given.
2144 These problems did NOT occur unless DomainKeys support was compiled.
2146 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2148 PH/24 Added ${if match_ip condition.
2150 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2151 databases so that it will be absolutely obvious if a crash occurs in the
2152 DB library. This is a regular occurrence (often caused by mis-matched
2155 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2156 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2157 picked up on a user's system that detects such things. There doesn't seem
2158 to be a gcc warning option for this - only an attribute that has to be
2159 put on the function's prototype. It seems that in Fedora Core 4 they have
2160 set this on a number of new functions. No doubt there will be more in due
2163 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2164 specify a transport. However, if an address that was verified by such a
2165 router was the subject of a callout, Exim crashed because it tried to
2166 read the rcpt_include_affixes from the non-existent transport. Now it
2167 just assumes that the setting of that option is false. This bug was
2168 introduced by 4.51/PH/31.
2170 PH/28 Changed -d+all to exclude +memory, because that information is very
2171 rarely of interest, but it makes the output a lot bigger. People tend to
2172 do -d+all out of habit.
2174 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2175 code in os-type was giving problems when libc.so lives in lib64, like on
2178 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2179 aren't the modern standard, and it seems that some systems' include files
2180 don't always have them. Exim was already checking for some of the newer
2181 ones like T_AAAA, and defining it itself. I've added checks for all the
2182 record types that Exim uses.
2184 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2185 not automatically generating a new one, as it is supposed to. This
2186 prevented TLS from working. If the file did exist, but contained invalid
2187 data, a new version was generated, as expected. It was only the case of a
2188 non-existent file that was broken.
2190 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2191 with a change in libdomainkeys > 0.64.
2193 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2194 from DNS. If the selector record carries the flag, it now has
2195 precedence over the domain-wide flag.
2197 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2199 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2200 the use of a port name that isn't defined in /etc/services) occurred, the
2201 message was deferred as in a normal delivery, and thus remained on the
2202 spool, instead of being failed because of the mua_wrapper setting. This
2203 is now fixed, and I tidied up some of the mua_wrapper messages at the
2206 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2207 the messages in a hash of arrays rather than using individual hashes.
2208 This is a bit cleaner and results in dramatic memory savings, albeit
2209 at a slight CPU cost.
2211 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2212 as requested by Marc Sherman.
2214 SC/10 Eximstats: added histograms for user specified patterns as requested
2217 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2219 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2220 fopen() in the content-scanning modules that did not already have it.
2226 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2227 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2229 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2231 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2233 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2234 to test Sieve filters that use "vacation".
2236 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2237 that changes the way the GnuTLS parameters are stored in the cache file.
2238 The new format can be generated externally. For backward compatibility,
2239 if the data in the cache doesn't make sense, Exim assumes it has read an
2240 old-format file, and it generates new data and writes a new file. This
2241 means that you can't go back to an older release without removing the
2244 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2245 work if there are any delivery delays because "one_time" forces the
2246 parent to be marked "delivered", so its unseen clone is never tried
2247 again. For this reason, Exim now forbids the simultaneous setting of
2250 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2251 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2252 entry if you want to know the details. The fix, however, neglected to
2253 consider the case when local delivery batching is involved. The test for
2254 "previously delivered" was not happening when checking to see if an
2255 address could be batched with a previous (undelivered) one; under
2256 certain circumstances this could lead to multiple deliveries to the same
2259 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2260 in its include files, and this causes problems building Exim.
2262 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2263 header_syntax) but Exim was just ignoring anything given after a slash.
2264 In particular, this caused confusion with an attempt to use "verify =
2265 reverse_host_lookup/defer_ok". An error is now given when options are
2266 supplied for verify items that do not have them. (Maybe reverse_host_
2267 lookup should have a defer_ok option, but that's a different point.)
2269 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2270 defined by RFC 821) to 2048, because there were problems with some AUTH
2271 commands, and RFC 1869 says the size should be increased for extended
2272 SMTP commands that take arguments.
2274 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2277 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2278 "unknown" error; now it says that the functionality isn't in the binary.
2280 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2281 an address' error message when a string expansion fails (syntax or
2282 whatever). Otherwise the password may appear in the log. Following change
2283 PH/42 below, there is no longer a chance of it appearing in a bounce
2286 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2288 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2289 of its addresses was ever tried. (Bugzilla bug #2.)
2291 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2292 the result incorrectly in the debug output. (It correctly added a newline
2293 to what was transported.)
2295 TF/01 Added $received_time.
2297 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2298 commented out examples of how to interface to a virus scanner and to
2299 SpamAssassin. Also added commented examples of av_scanner and
2300 spamd_address settings.
2302 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2303 and controls are allowed in which ACLs. There were a couple of minor
2304 errors. Some of the entries in the conditions table (which is a table of
2305 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2306 negation of where the condition IS allowed.
2308 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2310 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2311 header file does not have a version number, so I've had to invent a new
2312 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2313 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2314 radiusclient), but it was contributed by a Radius user.
2316 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2317 files or directories, for OpenSSL.
2319 PH/19 When an Exim process that is running as root has to create an Exim log
2320 file, it does so in a subprocess that runs as exim:exim so as to get the
2321 ownership right at creation (otherwise, other Exim processes might see
2322 the file with the wrong ownership). There was no test for failure of this
2323 fork() call, which would lead to the process getting stuck as it waited
2324 for a non-existent subprocess. Forks do occasionally fail when resources
2325 run out. I reviewed all the other calls to fork(); they all seem to check
2328 PH/20 When checking for unexpected SMTP input at connect time (before writing
2329 the banner), Exim was not dealing correctly with a non-positive return
2330 from the read() function. If the client had disconnected by this time,
2331 the result was a log entry for a synchronization error with an empty
2332 string after "input=" when read() returned zero. If read() returned -1
2333 (an event I could not check), uninitialized data bytes were printed.
2334 There were reports of junk text (parts of files, etc) appearing after
2337 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2339 PH/22 Added support for macro redefinition, and (re)definition in between
2340 driver and ACL definitions.
2342 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2343 forgetting to use the resulting value; it was using the unexpanded value.
2345 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2346 hadn't been configured. The fix is from Juergen Kreileder, who
2347 understands it better than I do:
2349 "Here's what I see happening with three configured cyrus_sasl
2350 authenticators configured (plain, login, cram-md5):
2352 On startup auth_cyrus_sasl_init() gets called for each of these.
2353 This means three calls to sasl_listmech() without a specified mech_list.
2354 => SASL tests which mechs of all available mechs actually work
2355 => three warnings about OTP not working
2356 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2358 With the patch, sasl_listmech() also gets called three times. But now
2359 SASL's mech_list option is set to the server_mech specified in the the
2360 authenticator. Or in other words, the answer from sasl_listmech()
2361 gets limited to just the mech you're testing for (which is different
2363 => the return list contains just 'plain' or 'login', 'cram-md5' or
2364 nothing depending on the value of ob->server_mech.
2366 I've just tested the patch: Authentication still works fine,
2367 unavailable mechs specified in the exim configuration are still
2368 caught, and the auth.log warnings about OTP are gone."
2370 PH/25 When debugging is enabled, the contents of the command line are added
2371 to the debugging output, even when log_selector=+arguments is not
2374 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2375 answer is "GNU", and only if the return is "GNU/something" is the answer
2378 PH/27 $acl_verify_message is now set immediately after the failure of a
2379 verification in an ACL, and so is available in subsequent modifiers. In
2380 particular, the message can be preserved by coding like this:
2382 warn !verify = sender
2383 set acl_m0 = $acl_verify_message
2385 Previously, $acl_verify_message was set only while expanding "message"
2386 and "log_message" when a very denied access.
2388 PH/28 Modified OS/os.c-Linux with
2390 -#ifndef OS_LOAD_AVERAGE
2391 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2393 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2394 nomenclature these days.)
2396 PH/29 Installed patch from the Sieve maintainer that adds the options
2397 sieve_useraddress and sieve_subaddress to the redirect router.
2399 PH/30 In these circumstances:
2400 . Two addresses routed to the same list of hosts;
2401 . First host does not offer TLS;
2402 . First host accepts first address;
2403 . First host gives temporary error to second address;
2404 . Second host offers TLS and a TLS session is established;
2405 . Second host accepts second address.
2406 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2407 and peerdn, if requested) that were in fact used only for the second
2410 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2411 attention to any local part prefix or suffix that was matched by the
2412 router that accepted the address. It now behaves in the same way as it
2413 does for delivery: the affixes are removed from the local part unless
2414 rcpt_include_affixes is set on the transport.
2416 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2417 timeout during the DATA phase of an incoming message.
2419 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2420 applied a patch sanctioned by the Sieve maintainer.
2422 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2423 the uid or gid is negative. A case of a negative gid caused this to be
2424 noticed. The fix allows for either to be negative.
2426 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2427 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2430 PH/36 The change PH/12 above was broken. Fixed it.
2432 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2433 the grounds that routing the same address twice would always produce the
2434 same answer. This might have been true once, but it is certainly no
2435 longer true now. Routing a child address may depend on the previous
2436 routing that produced that child. Some complicated redirection strategies
2437 went wrong when messages had multiple recipients, and made Exim's
2438 behaviour dependent on the order in which the addresses were given.
2440 I have moved the duplicate checking until after the routing is complete.
2441 Exim scans the addresses that are assigned to local and remote
2442 transports, and removes any duplicates. This means that more work will be
2443 done, as duplicates will always all be routed, but duplicates are
2444 presumably rare, so I don't expect this is of any significance.
2446 For deliveries to pipes, files, and autoreplies, the duplicate checking
2447 still happens during the routing process, since they are not going to be
2450 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2451 It corrects a timeout issue with spamd. This is Ian's comment: "The
2452 background is that sometimes spamd either never reads data from a
2453 connection it has accepted, or it never writes response data. The exiscan
2454 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2455 blindly assumes that writes won't block so it may never time out."
2457 PH/39 Allow G after quota size as well as K and M.
2459 PH/40 The value set for $authenticated_id in an authenticator may not contain
2460 binary zeroes or newlines because the value is written to log lines and
2461 to spool files. There was no check on this. Now the value is run through
2462 the string_printing() function so that such characters are converted to
2463 printable escape sequences.
2465 PH/41 $message_linecount is a new variable that contains the total number of
2466 lines in the message. Compare $body_linecount, which is the count for the
2469 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2470 bounce and delay warning messages, except in certain special cases, which
2473 (a) An SMTP error message from a remote host;
2474 (b) A message specified in a :fail: redirection;
2475 (c) A message specified in a "fail" command in a system filter;
2476 (d) A message specified in a FAIL return from the queryprogram router;
2477 (e) A message specified by the cannot_route_message router option.
2479 In these cases only, Exim does include the error details in bounce and
2480 warning messages. There are also a few cases where bland messages such
2481 as "unrouteable address" or "local delivery error" are given.
2483 PH/43 $value is now also set for the "else" part of a ${run expansion.
2485 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2486 being worked on, but at least Exim now implements the latest version to
2489 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2490 process to complete was treated as a delivery failure, a timeout while
2491 writing the message to the pipe was logged, but erroneously treated as a
2492 successful delivery. Such timeouts include transport filter timeouts. For
2493 consistency with the overall process timeout, these timeouts are now
2494 treated as errors, giving rise to delivery failures by default. However,
2495 there is now a new Boolean option for the pipe transport called
2496 timeout_defer, which, if set TRUE, converts the failures into defers for
2497 both kinds of timeout. A transport filter timeout is now identified in
2500 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2501 systems where "make" and "gmake" are different, calling "gmake" at top
2502 level broke things. I've arranged for the value of $(MAKE) to be passed
2503 from the Makefile to this script so that it can call the same version of
2507 A note about Exim versions 4.44 and 4.50
2508 ----------------------------------------
2510 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2511 changes of various kinds. As a consequence, a big documentation update was
2512 needed. This delayed the release for rather longer than seemed good, especially
2513 in the light of a couple of (minor) security issues. Therefore, the changes
2514 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2515 release. So 4.44 and 4.50 are in effect two different branches that both start
2518 I have left the 4.50 change log unchanged; it contains all the changes since
2519 4.43. The change log for 4.44 is below; many of its items are identical to
2520 those for 4.50. This seems to be the most sensible way to preserve the
2521 historical information.
2527 1. Minor wording change to the doc/README.SIEVE file.
2529 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2530 computation of the current number of files was incorrect.
2532 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2533 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2536 4. Give more explanation in the error message when the command for a transport
2537 filter fails to execute.
2539 5. There are several places where Exim runs a non-Exim command in a
2540 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2541 was being done only for the command run by the queryprogram router. It is
2542 now done for all such subprocesses. The other cases are: ${run, transport
2543 filters, and the commands run by the lmtp and pipe transports.
2545 6. Added CONFIGURE_GROUP build-time option.
2547 7. Some older OS have a limit of 256 on the maximum number of file
2548 descriptors. Exim was using setrlimit() to set 1000 as a large value
2549 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2550 systems. I've change it so that if it can't get 1000, it tries for 256.
2552 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2553 was an oversight, and furthermore, ever since the addition of extra
2554 controls (e.g. 4.43/32), the checks on when to allow different forms of
2555 "control" were broken. There should now be diagnostics for all cases when a
2556 control that does not make sense is encountered.
2558 9. Added the /retain_sender option to "control=submission".
2560 10. $recipients is now available in the predata ACL (oversight).
2562 11. Tidy the search cache before the fork to do a delivery from a message
2563 received from the command line. Otherwise the child will trigger a lookup
2564 failure and thereby defer the delivery if it tries to use (for example) a
2565 cached ldap connection that the parent has called unbind on.
2567 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2568 of $address_data from the recipient verification was clobbered by the
2569 sender verification.
2571 13. The value of address_data from a sender verification is now available in
2572 $sender_address_data in subsequent conditions in the ACL statement.
2574 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2576 15. Added a new option "connect=<time>" to callout options, to set a different
2579 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2580 was its contents. (It was OK if the option was not defined at all.)
2582 17. A "Completed" log line is now written for messages that are removed from
2583 the spool by the -Mrm option.
2585 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2586 information about exactly what failed.
2588 19. Added -dd to debug only the daemon process.
2590 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2591 handles timeouts, both on the server side and network timeouts. Renamed the
2592 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2594 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2595 It is now set to "smtps".
2597 22. $host_address is now set to the target address during the checking of
2598 ignore_target_hosts.
2600 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2601 being passed; this would have caused $sender_host_name to have been used if
2602 matching the list had actually called for a host name (not very likely,
2603 since this list is usually IP addresses). A host name is now passed as
2606 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2607 code that specifies a non-restarting handler (typically sigaction() in
2608 modern systems) in an attempt to fix a rare and obscure crash bug.
2610 25. Narrowed the window for a race in the daemon that could cause it to ignore
2611 SIGCHLD signals. This is not a major problem, because they are used only to
2612 wake it up if nothing else does.
2614 26. A malformed maildirsize file could cause Exim to calculate negative values
2615 for the mailbox size or file count. Odd effects could occur as a result.
2616 The maildirsize information is now recalculated if the size or filecount
2619 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2620 support for a long time. Removed HAVE_SYS_VFS_H.
2622 28. Installed the latest version of exipick from John Jetmore.
2624 29. In an address list, if the pattern was not a regular expression, an empty
2625 subject address (from a bounce message) matched only if the pattern was an
2626 empty string. Non-empty patterns were not even tested. This was the wrong
2627 because it is perfectly reasonable to use an empty address as part of a
2628 database query. An empty address is now tested by patterns that are
2629 lookups. However, all the other forms of pattern expect the subject to
2630 contain a local part and a domain, and therefore, for them, an empty
2631 address still always fails if the pattern is not itself empty.
2633 30. Exim went into a mad DNS loop when attempting to do a callout where the
2634 host was specified on an smtp transport, and looking it up yielded more
2635 than one IP address.
2637 31. Re-factored the code for checking spool and log partition space into a
2638 function that finds that data and another that does the check. The former
2639 is then used to implement four new variables: $spool_space, $log_space,
2640 $spool_inodes, and $log_inodes.
2642 32. The RFC2047 encoding function was originally intended for short strings
2643 such as real names; it was not keeping to the 75-character limit for
2644 encoded words that the RFC imposes. It now respects the limit, and
2645 generates multiple encoded words if necessary. To be on the safe side, I
2646 have increased the buffer size for the ${rfc2047: expansion operator from
2649 33. It is now permitted to omit both strings after an "if" condition; if the
2650 condition is true, the result is "true". As before, when the second string
2651 is omitted, a false condition yields an empty string. This makes it less
2652 cumbersome to write custom ACL and router conditions.
2654 34. Failure to deliver a bounce message always caused it to be frozen, even if
2655 there was an errors_to setting on the router. The errors_to setting is now
2658 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2659 canonical form (fully expanded) before being placed in
2660 $sender_host_address.
2662 36. The table in the code that translates DNS record types into text (T_A to
2663 "A" for instance) was missing entries for NS and CNAME. It is just possible
2664 that this could have caused confusion if both these types were looked up
2665 for the same domain, because the text type is used as part of Exim's
2666 per-process caching. But the chance of anyone hitting this buglet seems
2669 37. The dnsdb lookup has been extended in a number of ways.
2671 (1) There is a new type, "zns", which walks up the domain tree until it
2672 finds some nameserver records. It should be used with care.
2674 (2) There is a new type, "mxh", which is like "mx" except that it returns
2675 just the host names, not the priorities.
2677 (3) It is now possible to give a list of domains (or IP addresses) to be
2678 looked up. The behaviour when one of the lookups defers can be
2679 controlled by a keyword.
2681 (4) It is now possible to specify the separator character for use when
2682 multiple records are returned.
2684 38. The dnslists ACL condition has been extended: it is now possible to supply
2685 a list of IP addresses and/or domains to be looked up in a particular DNS
2688 39. Added log_selector=+queue_time_overall.
2690 40. When running the queue in the test harness, wait just a tad after forking a
2691 delivery process, to get repeatability of debugging output.
2693 41. Include certificate and key file names in error message when GnuTLS fails
2694 to set them up, because the GnuTLS error message doesn't include the name
2695 of the failing file when there is a problem reading it.
2697 42. Allow both -bf and -bF in the same test run.
2699 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2701 44. The "Exiscan patch" is now merged into the mainline Exim source.
2703 45. Sometimes the final signoff response after QUIT could fail to get
2704 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2705 < 0 before doing a fflush(). This bug looks as though it goes back to the
2706 introduction of TLS in release 3.20, but "sometimes" must have been rare
2707 because the tests only now provoked it.
2709 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2710 (this can affect the format of dates).
2712 47. exim_tidydb, when checking for the continued existence of a message for
2713 which it has found a message-specific retry record, was not finding
2714 messages that were in split spool directories. Consequently, it was
2715 deleting retry records that should have stayed in existence.
2717 48. Steve fixed some bugs in eximstats.
2719 49. The SPA authentication driver was not abandoning authentication and moving
2720 on to the next authenticator when an expansion was forced to fail,
2721 contradicting the general specification for all authenticators. Instead it
2722 was generating a temporary error. It now behaves as specified.
2724 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2725 (the order specifies the preference for clients). The order is now AES256,
2726 AES128, 3DES, ARCFOUR128.
2728 51. Small patch to Sieve code - explicitly set From: when generating an
2731 52. Exim crashed if a remote delivery caused a very long error message to be
2732 recorded - for instance if somebody sent an entire SpamAssassin report back
2733 as a large number of 550 error lines. This bug was coincidentally fixed by
2734 increasing the size of one of Exim's internal buffers (big_buffer) that
2735 happened as part of the Exiscan merge. However, to be on the safe side, I
2736 have made the code more robust (and fixed the comments that describe what
2739 53. Now that there can be additional text after "Completed" in log lines (if
2740 the queue_time_overall log selector is set), a one-byte patch to exigrep
2741 was needed to allow it to recognize "Completed" as not the last thing in
2744 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2745 patch that reportedly fixes this has been added. I am not expert enough to
2746 create a test for it. This is what the patch creator wrote:
2748 "I found a little strange behaviour of ldap code when working with
2749 Windows 2003 AD Domain, where users was placed in more than one
2750 Organization Units. When I tried to give exim partial DN, the exit code
2751 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2752 But simultaneously result of request was absolutely normal ldap result,
2753 so I produce this patch..."
2755 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2756 REFERENCE, so I have modified the code to exclude the patch when that macro
2759 55. Some experimental protocols are using DNS PTR records for new purposes. The
2760 keys for these records are domain names, not reversed IP addresses. The
2761 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2762 leaves it alone. Component reversal etc. now happens only for IP addresses.
2765 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2767 57. Double the size of the debug message buffer (to 2048) so that more of very
2768 long debug lines gets shown.
2770 58. The exicyclog utility now does better if the number of log files to keep
2771 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2773 59. Two changes related to the smtp_active_hostname option:
2775 (1) $smtp_active_hostname is now available as a variable.
2776 (2) The default for smtp_banner uses $smtp_active_hostname instead
2777 of $primary_hostname.
2779 60. The host_aton() function is supposed to be passed a string that is known
2780 to be a valid IP address. However, in the case of IPv6 addresses, it was
2781 not checking this. This is a hostage to fortune. Exim now panics and dies
2782 if the condition is not met. A case was found where this could be provoked
2783 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2784 components; fortuitously, this particular loophole had already been fixed
2785 by change 4.50/55 above.
2787 If there are any other similar loopholes, the new check in host_aton()
2788 itself should stop them being exploited. The report I received stated that
2789 data on the command line could provoke the exploit when Exim was running as
2790 exim, but did not say which command line option was involved. All I could
2791 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2792 running as the user.
2795 61. There was a buffer overflow vulnerability in the SPA authentication code
2796 (which came originally from the Samba project). I have added a test to the
2797 spa_base64_to_bits() function which I hope fixes it.
2800 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2801 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2803 63. The daemon start-up calls getloadavg() while still root for those OS that
2804 need the first call to be done as root, but it missed one case: when
2805 deliver_queue_load_max is set with deliver_drop_privilege. This is
2806 necessary for the benefit of the queue runner, because there is no re-exec
2807 when deliver_drop_privilege is set.
2809 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2810 This has been fixed.
2812 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2813 was in use, was not putting the data itself into the right store pool;
2814 consequently, it could be overwritten for a subsequent message in the same
2815 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2818 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2820 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2821 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2822 the function were treating the return as a boolean value, which happened to
2823 work because 0=false and not-0=true, but is not correct code.
2825 68. The host_aton() function was not handling scoped IPv6 addresses (those
2826 with, for example, "%eth0" on the end) correctly.
2828 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2829 negated items (that is, ~something) in unsigned ints. Some compilers
2830 apparently mutter when there is no cast.
2832 70. If an address verification called from an ACL failed, and did not produce a
2833 user-specific message (i.e. there was only a "system" message), nothing was
2834 put in $acl_verify_message. In this situation, it now puts the system
2837 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2838 session; change 4.31/43 added the unwanted input to the log line - except
2839 that it did not do this in the start of session case. It now does.
2841 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2842 This is wrong and can cause the other end to generate a synchronization
2843 error if it is another Exim or anything else that does the synchronization
2844 check. A QUIT command is no longer sent after a timeout.
2846 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2847 during host lookups.
2849 74. The defer_ok option of callout verification was not working if it was used
2850 when verifying addresses in header lines, that is, for this case:
2852 verify = header_sender/callout=defer_ok
2854 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2855 those file descriptors could be used for SMTP connections. If anything
2856 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2857 could be sent to the SMTP client, causing chaos. The daemon now opens
2858 stdin, stdout, and stderr to /dev/null when it puts itself into the
2861 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2862 log by default. The user can override this with suitable Perl magic.
2864 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2865 the log message when discard triggers, was not working for the DATA ACL or
2866 for the non-SMTP ACL.
2868 78. Error message wording change in sieve.c.
2870 79. If smtp_accept_max_per_host was set, the number of connections could be
2871 restricted to fewer than expected, because the daemon was trying to set up
2872 a new connection before checking whether the processes handling previous
2873 connections had finished. The check for completed processes is now done
2874 earlier. On busy systems, this bug wouldn't be noticed because something
2875 else would have woken the daemon, and it would have reaped the completed
2878 80. If a message was submitted locally by a user whose login name contained one
2879 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2880 It caused a spool format error. I have fixed the spool reading code. A
2881 related problem was that the "from" clause in the Received: line became
2882 illegal because of the space(s). It is now covered by ${quote_local_part.
2884 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2887 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2889 83. Patch from Sieve maintainer to fix unterminated string problem in
2890 "vacation" handling.
2892 84. Some minor changes to the Linux configuration files to help with other
2893 OS variants using glibc.
2895 85. One more patch for Sieve to update vacation handling to latest spec.
2898 ----------------------------------------------------
2899 See the note above about the 4.44 and 4.50 releases.
2900 ----------------------------------------------------
2906 1. Change 4.43/35 introduced a bug that caused file counts to be
2907 incorrectly computed when quota_filecount was set in an appendfile
2910 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2911 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2914 3. Give more explanation in the error message when the command for a transport
2915 filter fails to execute.
2917 4. There are several places where Exim runs a non-Exim command in a
2918 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2919 was being done only for the command run by the queryprogram router. It is
2920 now done for all such subprocesses. The other cases are: ${run, transport
2921 filters, and the commands run by the lmtp and pipe transports.
2923 5. Some older OS have a limit of 256 on the maximum number of file
2924 descriptors. Exim was using setrlimit() to set 1000 as a large value
2925 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2926 systems. I've change it so that if it can't get 1000, it tries for 256.
2928 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2929 was an oversight, and furthermore, ever since the addition of extra
2930 controls (e.g. 4.43/32), the checks on when to allow different forms of
2931 "control" were broken. There should now be diagnostics for all cases when a
2932 control that does not make sense is encountered.
2934 7. $recipients is now available in the predata ACL (oversight).
2936 8. Tidy the search cache before the fork to do a delivery from a message
2937 received from the command line. Otherwise the child will trigger a lookup
2938 failure and thereby defer the delivery if it tries to use (for example) a
2939 cached ldap connection that the parent has called unbind on.
2941 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2942 of $address_data from the recipient verification was clobbered by the
2943 sender verification.
2945 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2946 was its contents. (It was OK if the option was not defined at all.)
2948 11. A "Completed" log line is now written for messages that are removed from
2949 the spool by the -Mrm option.
2951 12. $host_address is now set to the target address during the checking of
2952 ignore_target_hosts.
2954 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2955 being passed; this would have caused $sender_host_name to have been used if
2956 matching the list had actually called for a host name (not very likely,
2957 since this list is usually IP addresses). A host name is now passed as
2960 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2961 code that specifies a non-restarting handler (typically sigaction() in
2962 modern systems) in an attempt to fix a rare and obscure crash bug.
2964 15. Narrowed the window for a race in the daemon that could cause it to ignore
2965 SIGCHLD signals. This is not a major problem, because they are used only to
2966 wake it up if nothing else does.
2968 16. A malformed maildirsize file could cause Exim to calculate negative values
2969 for the mailbox size or file count. Odd effects could occur as a result.
2970 The maildirsize information is now recalculated if the size or filecount
2973 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2974 support for a long time. Removed HAVE_SYS_VFS_H.
2976 18. Updated exipick to current release from John Jetmore.
2978 19. Allow an empty sender to be matched against a lookup in an address list.
2979 Previously the only cases considered were a regular expression, or an
2982 20. Exim went into a mad DNS lookup loop when doing a callout where the
2983 host was specified on the transport, if the DNS lookup yielded more than
2986 21. The RFC2047 encoding function was originally intended for short strings
2987 such as real names; it was not keeping to the 75-character limit for
2988 encoded words that the RFC imposes. It now respects the limit, and
2989 generates multiple encoded words if necessary. To be on the safe side, I
2990 have increased the buffer size for the ${rfc2047: expansion operator from
2993 22. Failure to deliver a bounce message always caused it to be frozen, even if
2994 there was an errors_to setting on the router. The errors_to setting is now
2997 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2998 canonical form (fully expanded) before being placed in
2999 $sender_host_address.
3001 24. Updated eximstats to version 1.33
3003 25. Include certificate and key file names in error message when GnuTLS fails
3004 to set them up, because the GnuTLS error message doesn't include the name
3005 of the failing file when there is a problem reading it.
3007 26. Expand error message when OpenSSL has problems setting up cert/key files.
3010 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3011 (this can affect the format of dates).
3013 28. exim_tidydb, when checking for the continued existence of a message for
3014 which it has found a message-specific retry record, was not finding
3015 messages that were in split spool directories. Consequently, it was
3016 deleting retry records that should have stayed in existence.
3018 29. eximstats updated to version 1.35
3019 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3020 1.35 - bugfix such that pie charts by volume are generated correctly
3022 30. The SPA authentication driver was not abandoning authentication and moving
3023 on to the next authenticator when an expansion was forced to fail,
3024 contradicting the general specification for all authenticators. Instead it
3025 was generating a temporary error. It now behaves as specified.
3027 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3028 (the order specifies the preference for clients). The order is now AES256,
3029 AES128, 3DES, ARCFOUR128.
3031 31. Small patch to Sieve code - explicitly set From: when generating an
3034 32. Exim crashed if a remote delivery caused a very long error message to be
3035 recorded - for instance if somebody sent an entire SpamAssassin report back
3036 as a large number of 550 error lines. This bug was coincidentally fixed by
3037 increasing the size of one of Exim's internal buffers (big_buffer) that
3038 happened as part of the Exiscan merge. However, to be on the safe side, I
3039 have made the code more robust (and fixed the comments that describe what
3042 33. Some experimental protocols are using DNS PTR records for new purposes. The
3043 keys for these records are domain names, not reversed IP addresses. The
3044 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3045 leaves it alone. Component reversal etc. now happens only for IP addresses.
3048 34. The host_aton() function is supposed to be passed a string that is known
3049 to be a valid IP address. However, in the case of IPv6 addresses, it was
3050 not checking this. This is a hostage to fortune. Exim now panics and dies
3051 if the condition is not met. A case was found where this could be provoked
3052 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3053 components; fortuitously, this particular loophole had already been fixed
3054 by change 4.50/55 or 4.44/33 above.
3056 If there are any other similar loopholes, the new check in host_aton()
3057 itself should stop them being exploited. The report I received stated that
3058 data on the command line could provoke the exploit when Exim was running as
3059 exim, but did not say which command line option was involved. All I could
3060 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3061 running as the user.
3064 35. There was a buffer overflow vulnerability in the SPA authentication code
3065 (which came originally from the Samba project). I have added a test to the
3066 spa_base64_to_bits() function which I hope fixes it.
3069 36. The daemon start-up calls getloadavg() while still root for those OS that
3070 need the first call to be done as root, but it missed one case: when
3071 deliver_queue_load_max is set with deliver_drop_privilege. This is
3072 necessary for the benefit of the queue runner, because there is no re-exec
3073 when deliver_drop_privilege is set.
3075 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3076 was in use, was not putting the data itself into the right store pool;
3077 consequently, it could be overwritten for a subsequent message in the same
3078 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3081 38. Sometimes the final signoff response after QUIT could fail to get
3082 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3083 < 0 before doing a fflush(). This bug looks as though it goes back to the
3084 introduction of TLS in release 3.20, but "sometimes" must have been rare
3085 because the tests only now provoked it.
3091 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3092 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3093 Now it returns an integer. A number of calls were still expecting a T/F
3094 return. Fortuitously, in all cases, the tests worked in OK situations,
3095 which is the norm. However, things would have gone wrong on any write
3096 failures on the smtp file descriptor. This function is used when sending
3097 messages over SMTP and also when doing verify callouts.
3099 2. When Exim is called to do synchronous delivery of a locally submitted
3100 message (the -odf or -odi options), it no longer closes stderr before doing
3103 3. Implemented the mua_wrapper option.
3105 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3107 5. Implemented the functions header_remove(), header_testname(),
3108 header_add_at_position(), and receive_remove_recipient(), and exported them
3111 6. If an ACL "warn" statement specified the addition of headers, Exim already
3112 inserted X-ACL-Warn: at the start if there was no header name. However, it
3113 was not making this test for the second and subsequent header lines if
3114 there were newlines in the string. This meant that an invalid header could
3115 be inserted if Exim was badly configured.
3117 7. Allow an ACL "warn" statement to add header lines at the start or after all
3118 the Received: headers, as well as at the end.
3120 8. Added the rcpt_4xx retry error code.
3122 9. Added postmaster_mailfrom=xxx to callout verification option.
3124 10. Added mailfrom=xxxx to the callout verification option, for verify=
3127 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3128 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3130 12. Inserted some casts to stop certain compilers warning when using pointer
3131 differences as field lengths or precisions in printf-type calls (mostly
3132 affecting debugging statements).
3134 13. Added optional readline() support for -be (dynamically loaded).
3136 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3137 same clock tick as a message's arrival, so that its received time was the
3138 same as the "first fail" time on the retry record, and that message
3139 remained on the queue past the ultimate address timeout, every queue runner
3140 would try a delivery (because it was past the ultimate address timeout) but
3141 after another failure, the ultimate address timeout, which should have then
3142 bounced the address, did not kick in. This was a "< instead of <=" error;
3143 in most cases the first failure would have been in the next clock tick
3144 after the received time, and all would be well.
3146 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3147 being recognized when the domain list was tested by the match_domain
3148 condition in an expansion string.
3150 16. Added the ${str2b64: operator.
3152 17. Exim was always calling setrlimit() to set a large limit for the number of
3153 processes, without checking whether the existing limit was already
3154 adequate. (It did check for the limit on file descriptors.) Furthermore,
3155 errors from getrlimit() and setrlimit() were being ignored. Now they are
3156 logged to the main and panic logs, but Exim does carry on, to try to do its
3157 job under whatever limits there are.
3159 18. Imported PCRE 5.0.
3161 19. Trivial typo in log message " temporarily refused connection" (the leading
3164 20. If the log selector return_path_on_delivery was set and an address was
3165 redirected to /dev/null, the delivery process crashed because it assumed
3166 that a return path would always be set for a "successful" delivery. In this
3167 case, the whole delivery is bypassed as an optimization, and therefore no
3170 21. Internal re-arrangement: the function for sending a challenge and reading
3171 a response while authentication was assuming a zero-terminated challenge
3172 string. It's now changed to take a pointer and a length, to allow for
3173 binary data in such strings.
3175 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3177 23. Exim was not respecting finduser_retries when seeking the login of the
3178 uid under which it was called; it was always trying 10 times. (The default
3179 setting of finduser_retries is zero.) Also, it was sleeping after the final
3180 failure, which is pointless.
3182 24. Implemented tls_on_connect_ports.
3184 25. Implemented acl_smtp_predata.
3186 26. If the domain in control=submission is set empty, Exim assumes that the
3187 authenticated id is a complete email address when it generates From: or
3188 Sender: header lines.
3190 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3191 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3192 chown and chgrp in /bin and hostname in /usr/bin.
3194 28. Exim was keeping the "process log" file open after each use, just as it
3195 does for the main log. This opens the possibility of it remaining open for
3196 long periods when the USR1 signal hits a daemon. Occasional processlog
3197 errors were reported, that could have been caused by this. Anyway, it seems
3198 much more sensible not to leave this file open at all, so that is what now
3201 29. The long-running daemon process does not normally write to the log once it
3202 has entered its main loop, and it closes the log before doing so. This is
3203 so that log files can straightforwardly be renamed and moved. However,
3204 there are a couple of unusual error situations where the daemon does write
3205 log entries, and I had neglected to close the log afterwards.
3207 30. The text of an SMTP error response that was received during a remote
3208 delivery was being truncated at 512 bytes. This is too short for some of
3209 the long messages that one sometimes sees. I've increased the limit to
3212 31. It is now possible to make retry rules that apply only when a message has a
3213 specific sender, in particular, an empty sender.
3215 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3216 it possible to be selective about when SMTP synchronization is enforced.
3218 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3220 32. Implemented hosts_connection_nolog.
3222 33. Added an ACL for QUIT.
3224 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3227 35. Added mailbox_size and mailbox_filecount to appendfile.
3229 36. Added control = no_multiline_responses to ACLs.
3231 37. There was a bug in the logic of the code that waits for the clock to tick
3232 in the case where the clock went backwards by a substantial amount such
3233 that the microsecond fraction of "now" was more than the microsecond
3234 fraction of "then" (but the whole seconds number was less).
3236 38. Added support for the libradius Radius client library this is found on
3237 FreeBSD (previously only the radiusclient library was supported).
3243 1. When certain lookups returned multiple values in the form name=value, the
3244 quoting of the values was not always being done properly. Specifically:
3245 (a) If the value started with a double quote, but contained no whitespace,
3247 (b) If the value contained whitespace other than a space character (i.e.
3248 tabs or newlines or carriage returns) it was not quoted.
3249 This fix has been applied to the mysql and pgsql lookups by writing a
3250 separate quoting function and calling it from the lookup code. The fix
3251 should probably also be applied to nisplus, ibase and oracle lookups, but
3252 since I cannot test any of those, I have not disturbed their existing code.
3254 2. A hit in the callout cache for a specific address caused a log line with no
3255 reason for rejecting RCPT. Now it says "Previous (cached) callout
3256 verification failure".
3258 3. There was an off-by-one bug in the queryprogram router. An over-long
3259 return line was truncated at 256 instead of 255 characters, thereby
3260 overflowing its buffer with the terminating zero. As well as fixing this, I
3261 have increased the buffer size to 1024 (and made a note to document this).
3263 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3264 when Exim is waiting for an SMTP response from a remote server, Exim
3265 restarts its select() call on the socket, thereby resetting its timeout.
3266 This is not a problem when such interrupts are rare. Somebody set up a cron
3267 job to run exiwhat every 2 minutes, which is less than the normal select()
3268 timeout (5 or 10 minutes). This meant that the select() timeout never
3269 kicked in because it was always reset. I have fixed this by comparing the
3270 time when an interrupt arrives with the time at the start of the first call
3271 to select(). If more time than the timeout has elapsed, the interrupt is
3272 treated as a timeout.
3274 5. Some internal re-factoring in preparation for the addition of Sieve
3275 extensions (by MH). In particular, the "personal" test is moved to a
3276 separate function, and given an option for scanning Cc: and Bcc: (which is
3277 not set for Exim filters).
3279 6. When Exim created an email address using the login of the caller as the
3280 local part (e.g. when creating a From: or Sender: header line), it was not
3281 quoting the local part when it contained special characters such as @.
3283 7. Installed new OpenBSD configuration files.
3285 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3286 try to make them clearer.
3288 9. Callout options, other than the timeout value, were being ignored when
3289 verifying sender addresses in header lines. For example, when using
3291 verify = header_sender/callout=no_cache
3293 the cache was (incorrectly) being used.
3295 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3296 only the Cygwin environment.
3298 11. When return_path_on_delivery was set as a log selector, if different remote
3299 addresses in the same message used different return paths and parallel
3300 remote delivery occurred, the wrong values would sometimes be logged.
3301 (Whenever a remote delivery process finished, the return path value from
3302 the most recently started remote delivery process was logged.)
3304 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3305 lines when AUTH and/or TLS are in use. This is the "received protocol"
3306 field. Exim used to use "asmtp" for authenticated SMTP, without any
3307 indication (in the protocol name) for TLS use. Now it follows the RFC and
3308 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3309 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3310 names appear in log lines as well as in Received: header lines.
3312 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3313 extensions, and comparison tests, and to fix some bugs.
3315 14. Changes to the "personal" filter test:
3317 (1) The test was buggy in that it was just doing the equivalent of
3318 "contains" tests on header lines. For example, if a user's address was
3319 anne@some.where, the "personal" test would incorrectly be true for
3321 To: susanne@some.where
3323 This test is now done by extracting each address from the header in turn,
3324 and checking the entire address. Other tests that are part of "personal"
3325 are now done using regular expressions (for example, to check local parts
3326 of addresses in From: header lines).
3328 (2) The list of non-personal local parts in From: addresses has been
3329 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3330 taken from the Sieve specification recommendations.
3332 (3) If the message contains any header line starting with "List-" it is
3333 treated as non-personal.
3335 (4) The test for "circular" in the Subject: header line has been removed
3336 because it now seems ill-conceived.
3338 15. Minor typos in src/EDITME comments corrected.
3340 16. Installed latest exipick from John Jetmore.
3342 17. If headers_add on a router specified a text string that was too long for
3343 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3344 of string_sprintf() is now avoided.
3346 18. $message_body_size was not set (it was always zero) when running the DATA
3347 ACL and the local_scan() function.
3349 19. For the "mail" command in an Exim filter, no default was being set for
3350 the once_repeat time, causing a random time value to be used if "once" was
3351 specified. (If the value happened to be <= 0, no repeat happened.) The
3352 default is now 0s, meaning "never repeat". The "vacation" command was OK
3353 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3354 (I found it when inspecting the code).
3356 20. There is now an overall timeout for performing a callout verification. It
3357 defaults to 4 times the callout timeout, which applies to individual SMTP
3358 commands during the callout. The overall timeout applies when there is more
3359 than one host that can be tried. The timeout is checked before trying the
3360 next host. This prevents very long delays if there are a large number of
3361 hosts and all are timing out (e.g. when the network connections are timing
3362 out). The value of the overall timeout can be changed by specifying an
3363 additional sub-option for "callout", called "maxwait". For example:
3365 verify = sender/callout=5s,maxwait=20s
3367 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3368 to the end before writing, but this should make it even safer).
3370 22. Exim was forgetting that it had advertised PIPELINING for the second and
3371 subsequent messages on an SMTP connection. It was also not resetting its
3372 memory on STARTTLS and an internal HELO.
3374 23. When Exim logs an SMTP synchronization error within a session, it now
3375 records whether PIPELINING has been advertised or not.
3377 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3378 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3379 rather than long int.
3381 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3383 26. Added the never_mail option to autoreply.
3389 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3390 crash if the getsockname() call failed; this can happen if a connection is
3391 closed very soon after it is established. The problem was simply in the
3392 order in which certain operations were done, causing Exim to try to write
3393 to the SMTP stream before it had set up the file descriptor. The bug has
3394 been fixed by making things happen in the correct order.
3400 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3401 before the connection was closed, thus losing the rejection response.
3403 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3404 some early Solaris releases, but causes trouble in current releases where
3405 socklen_t is defined.
3407 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3410 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3413 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3414 that releasing the top of it at the end releases what was used for sub-
3415 expansions (unless the block got too big). However, discard this block if
3416 the first thing is a variable or header, so that we can use its block when
3417 it is dynamic (useful for very large $message_headers, for example).
3419 6. Lookups now cache *every* query, not just the most recent. A new, separate
3420 store pool is used for this. It can be recovered when all lookup caches are
3421 flushed. Lookups now release memory at the end of their result strings.
3422 This has involved some general refactoring of the lookup sources.
3424 7. Some code has been added to the store_xxx() functions to reduce the amount
3425 of flapping under certain conditions.
3427 8. log_incoming_interface used to affect only the <= reception log lines. Now
3428 it causes the local interface and port to be added to several more SMTP log
3429 lines, for example "SMTP connection from", and rejection lines.
3431 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3433 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3435 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3436 could be overwritten at the end of the current message (or the start of a
3437 new message if it was set in a HELO ACL). The value is now preserved for
3438 the duration of the SMTP connection.
3440 12. If a transport had a headers_rewrite setting, and a matching header line
3441 contained an unqualified address, that address was qualified, even if it
3442 did not match any rewriting rules. The underlying bug was that the values
3443 of the flags that permit the existence of unqualified sender and recipient
3444 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3445 non-local messages, and by -bnq for local messages) were not being
3446 preserved with the message after it was received.
3448 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3449 "next input=" as part of the text comprising the host identity instead of
3450 the correct text. The code was using the same buffer for two different
3451 strings. However, depending on which order the printing function evaluated
3452 its arguments, the bug did not always show up. Under Linux, for example, my
3453 test suite worked just fine.
3455 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3456 doesn't work with some older versions of Perl. It has been changed to "my",
3457 which in any case is probably the better facility to use.
3459 15. A really picky compiler found some instances of statements for creating
3460 error messages that either had too many or two few arguments for the format
3463 16. The size of the buffer for calls to the DNS resolver has been increased
3464 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3465 for addresses that have a lot of PTR records. This alleviates a problem; it
3466 does not fully solve it.
3468 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3469 buffer now truncates the list and logs the incident, which is the same
3470 action as happens when Exim is looking up a host name and its aliases.
3471 Previously in this situation something unpredictable would happen;
3472 sometimes it was "internal error: store_reset failed".
3474 18. If a server dropped the connection unexpectedly when an Exim client was
3475 using GnuTLS and trying to read a response, the client delivery process
3476 crashed while trying to generate an error log message.
3478 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3479 string, for example:
3481 warn message = H1: something\nH2: something
3483 the text was added as a single header line from Exim's point of view
3484 though it ended up OK in the delivered message. However, searching for the
3485 second and subsequent header lines using $h_h2: did not work. This has been
3486 fixed. Similarly, if a system filter added multiple headers in this way,
3487 the routers could not see them.
3489 20. Expanded the error message when iplsearch is called with an invalid key to
3490 suggest using net-iplsearch in a host list.
3492 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3493 ACLs are no longer actually imposed (and a message to that effect is
3496 22. If a "gecos" field in a passwd entry contained escaped characters, in
3497 particular, if it contained a \" sequence, Exim got it wrong when building
3498 a From: or a Sender: header from that name. A second bug also caused
3499 incorrect handling when an unquoted " was present following a character
3500 that needed quoting.
3502 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3503 was not being matched caselessly.
3505 24. Arranged for all hyphens in the exim.8 source to be escaped with
3508 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3509 properly. Recipient callout cache records were still being keyed to include
3510 the sender, even when use_sender was set false. This led to far more
3511 callouts that were necessary. The sender is no longer included in the key
3512 when use_sender is false.
3514 26. Added "control = submission" modifier to ACLs.
3516 27. Added the ${base62d: operator to decode base 62 numbers.
3518 28. dnsdb lookups can now access SRV records.
3520 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3521 the configuration file.
3523 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3524 (-v) mode. This makes the output for a verbose queue run more intelligible.
3526 31. Added a use_postmaster feature to recipient callouts.
3528 32. Added the $body_zerocount variable, containing the number of binary zero
3529 bytes in the message body.
3531 33. The time of last modification of the "new" subdirectory is now used as the
3532 "mailbox time last read" when there is a quota error for a maildir
3535 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3537 35. Added +ignore_unknown as a special item in host lists.
3539 36. Code for decoding IPv6 addresses in host lists is now included, even if
3540 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3541 address was recognized as an IP address, but was then not correctly decoded
3542 into binary, causing unexpected and incorrect effects when compared with
3549 1. Very minor rewording of debugging text in manualroute to say "list of
3550 hosts" instead of "hostlist".
3552 2. If verify=header_syntax was set, and a header line with an unqualified
3553 address (no domain) and a large number of spaces between the end of the
3554 name and the colon was received, the reception process suffered a buffer
3555 overflow, and (when I tested it) crashed. This was caused by some obsolete
3556 code that should have been removed. The fix is to remove it!
3558 3. When running in the test harness, delay a bit after writing a bounce
3559 message to get a bit more predictability in the log output.
3561 4. Added a call to search_tidyup() just before forking a reception process. In
3562 theory, someone could use a lookup in the expansion of smtp_accept_max_
3563 per_host which, without the tidyup, could leave open a database connection.
3565 5. Added the variables $recipient_data and $sender_data which get set from a
3566 lookup success in an ACL "recipients" or "senders" condition, or a router
3567 "senders" option, similar to $domain_data and $local_part_data.
3569 6. Moved the writing of debug_print from before to after the "senders" test
3572 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3573 problems for message scanning, either using a data ACL, or using
3574 local_scan() because the Received: header was not generated till after they
3575 were called (in order to set the time as the time of reception completion).
3576 I have revised the way this works. The header is now generated after the
3577 body is received, but before the ACL or local_scan() are called. After they
3578 are run, the timestamp in the header is updated.
3584 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3585 before starting a queue runner without re-exec. This happened only when
3586 deliver_drop_privilege was set or when the Exim user was set to root. The
3587 effect of the bug was that timeouts during subsequent deliveries caused
3588 crashes instead of being properly handled. The handler is now left at its
3589 default (and expected) setting.
3591 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3592 message, again when deliver_drop_privilege is set or Exim is run as root.
3593 The bug described in (1) was not present in this case, but the tidying up
3594 of the other signals was missing. I have made the two cases consistent.
3596 3. The ignore_target_hosts setting on a manualroute router was being ignored
3597 for hosts that were looked up using the /MX notation.
3599 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3602 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3603 operated on the sender address. After changing the $sender_address to <>
3604 for the sender address verify, Exim was re-instated it as the original
3605 (before rewriting) address, but remembering that it had rewritten it, so it
3606 wasn't rewriting it again. This bug also had the effect of breaking the
3607 sender address verification caching when the sender address was rewritten.
3609 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3610 This has been changed so that if the ip literal address matches
3611 ignore_target_hosts, the router declines.
3613 7. Added expansion conditions match_domain, match_address, and match_local_
3614 part (NOT match_host).
3616 8. The placeholder for the Received: header didn't have a length field set.
3618 9. Added code to Exim itself and to exim_lock to test for a specific race
3619 condition that could lead to file corruption when using MBX delivery. The
3620 issue is with the lockfile that is created in /tmp. If this file is removed
3621 after a process has opened it but before that process has acquired a lock,
3622 there is the potential for a second process to recreate the file and also
3623 acquire a lock. This could lead to two Exim processes writing to the file
3624 at the same time. The added code performs the same test as UW imapd; it
3625 checks after acquiring the lock that its file descriptor still refers to
3626 the same named file.
3628 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3629 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3632 11. Added the smtp_active_hostname option. If used, this will typically be made
3633 to depend on the incoming interface address. Because $interface_address is
3634 not set up until the daemon has forked a reception process, error responses
3635 that can happen earlier (such as "too many connections") no longer contain
3638 12. If an expansion in a condition on a "warn" statement fails because a lookup
3639 defers, the "warn" statement is abandoned, and the next ACL statement is
3640 processed. Previously this caused the whole ACL to be aborted.
3642 13. Added the iplsearch lookup type.
3644 14. Added ident_timeout as a log selector.
3646 15. Added tls_certificate_verified as a log selector.
3648 16. Added a global option tls_require_ciphers (compare the smtp transport
3649 option of the same name). This controls incoming TLS connections.
3651 17. I finally figured out how to make tls_require_ciphers do a similar thing
3652 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3653 before starting the TLS session.
3655 18. Tabs are now shown as \t in -bP output.
3657 19. If the log selector return_path_on_delivery was set, Exim crashed when
3658 bouncing a message because it had too many Received: header lines.
3660 20. If two routers both had headers_remove settings, and the first one included
3661 a superfluous trailing colon, the final name in the first list and the
3662 first name in the second list were incorrectly joined into one item (with a
3663 colon in the middle).
3669 1. Added -C and -D options to the exinext utility, mainly to make it easier
3670 to include in the automated testing, but these could be helpful when
3671 multiple configurations are in use.
3673 2. The exinext utility was not formatting the output nicely when there was
3674 an alternate port involved in the retry record key, nor when there was a
3675 message id as well (for retries that were specific to a specific message
3676 and a specific host). It was also confused by IPv6 addresses, because of
3677 the additional colons they contain. I have fixed the IPv4 problem, and
3678 patched it up to do a reasonable job for IPv6.
3680 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3681 delivery, the log line now contains "pipelined" if PIPELINING was used.
3683 4. An SMTP transport process used to panic and die if the bind() call to set
3684 an explicit outgoing interface failed. This has been changed; it is now
3685 treated in the same way as a connect() failure.
3687 5. A reference to $sender_host_name in the part of a conditional expansion
3688 that was being skipped was still causing a DNS lookup. This no longer
3691 6. The def: expansion condition was not recognizing references to header lines
3692 that used bh_ and bheader_.
3694 7. Added the _cache feature to named lists.
3696 8. The code for checking quota_filecount in the appendfile transport was
3697 allowing one more file than it should have been.
3699 9. For compatibility with Sendmail, the command line option
3707 and sets the incoming protocol and host name (for trusted callers). The
3708 host name and its colon can be omitted when only the protocol is to be set.
3709 Note the Exim already has two private options, -pd and -ps, that refer to
3710 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3711 "s", but I don't think that's a major issue.
3713 10. A number of refactoring changes to the code, none of which should affect
3716 (a) The number of logging options was getting close to filling up the
3717 32-bit word that was used as a bit map. I have split them into two classes:
3718 those that are passed in the argument to log_write(), and those that are
3719 only ever tested independently outside of that function. These are now in
3720 separate 32-bit words, so there is plenty of room for expansion again.
3721 There is no change in the user interface or the logging behaviour.
3723 (b) When building, for example, log lines, the code previously used a
3724 macro that called string_cat() twice, in order to add two strings. This is
3725 not really sufficiently general. Furthermore, there was one instance where
3726 it was actually wrong because one of the argument was used twice, and in
3727 one call a function was used. (As it happened, calling the function twice
3728 did not affect the overall behaviour.) The macro has been replaced by a
3729 function that can join an arbitrary number of extra strings onto a growing
3732 (c) The code for expansion conditions now uses a table and a binary chop
3733 instead of a serial search (which was left over from when there were very
3734 few conditions). Also, it now recognizes conditions like "pam" even when
3735 the relevant support is not compiled in: a suitably worded error message is
3736 given if an attempt is made to use such a condition.
3738 11. Added ${time_interval:xxxxx}.
3740 12. A bug was causing one of the ddress fields not to be passed back correctly
3741 from remote delivery subprocesses. The field in question was not being
3742 subsequently used, so this caused to problems in practice.
3744 13. Added new log selectors queue_time and deliver_time.
3746 14. Might have fixed a bug in maildirsizefile handling that threw up
3747 "unexpected character" debug warnings, and recalculated the data
3748 unnecessarily. In any case, I expanded the warning message to give more
3751 15. Added the message "Restricted characters in address" to the statements in
3752 the default ACL that block characters like @ and % in local parts.
3754 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3755 Three changes have been made:
3757 (a) There was a serious bug; a negative response to MAIL caused the whole
3758 recipient domain to be cached as invalid, thereby blocking all messages
3759 to all local parts at the same domain, from all senders. This bug has
3760 been fixed. The domain is no longer cached after a negative response to
3761 MAIL if the sender used is not empty.
3763 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3766 (c) A new callout option, "use_sender" has been added for people who want
3767 the modified behaviour.
3773 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3776 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3777 indeed breaks things for older releases.
3779 3. Added additional logging to the case where there is a problem reading data
3780 from a filter that is running in a subprocess using a pipe, in order to
3781 try to track down a specific problem.
3783 4. Testing facility fudge: when running in the test harness and attempting
3784 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3785 getting "No route to host". Convert this to a timeout.
3787 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3790 6. Some OS don't have socklen_t but use size_t instead. This affects the
3791 fifth argument of getsockopt() amongst other things. This is now
3792 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3793 can be set for individual OS. I have set it for SunOS5, OSF1, and
3794 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3795 some earlier ones do not.
3797 7. Change 4.30/15 was not doing the test caselessly.
3799 8. The standard form for an IPv6 address literal was being rejected by address
3800 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3801 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3802 this, as well as the form without the "IPv6" on the front (but only when
3803 address literals are enabled, of course).
3805 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3807 10. Exim crashed if a message with an empty sender address specified by -f
3808 encountered a router with an errors_to setting. This could be provoked only
3809 by a command such as
3813 where an empty string was supplied; "<>" did not hit this bug.
3815 11. Installed PCRE release 4.5.
3817 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3818 remained set. It is now erased.
3820 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3821 times from message ids (which are base 36 rather than the normal 62).
3823 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3824 were being counted as actual protocol errors, and logged if the log
3825 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3826 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3827 and DATA following a set of rejected RCPTs do not count as protocol errors.
3828 In other words, Exim assumes they were pipelined, though this may not
3829 actually be the case. Of course, in all cases the client gets an
3830 appropriate error code.
3832 15. If a lookup fails in an ACL condition, a message about the failure may
3833 be available; it is used if testing the ACL cannot continue, because most
3834 such messages specify what the cause of the deferral is. However, some
3835 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3836 that caused an old message to be retained and used if a later statement
3837 caused a defer, replacing the real cause of the deferral.
3839 16. If an IP address had so many PTR records that the DNS lookup buffer
3840 was not large enough to hold them, Exim could crash while trying to process
3841 the truncated data. It now detects and logs this case.
3843 17. Further to 4.21/58, another change has been made: if (and only if) the
3844 first line of a message (the first header line) ends with CRLF, a bare LF
3845 in a subsequent header line has a space inserted after it, so as not to
3846 terminate the header.
3848 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3849 unnecessarily, used atoi() instead of strtol(), and didn't check the
3850 termination when getting file sizes from file names by regex.
3852 19. Completely re-implemented the support for maildirsize files, in the light
3853 of a number of problems with the previous contributed implementation
3854 (4.30/29). In particular:
3856 . If the quota is zero, the maildirsize file is maintained, but no quota is
3859 . If the maildir directory does not exist, it is created before any attempt
3860 to write a maildirsize file.
3862 . The quota value in the file is just a cache; if the quota is changed in
3863 the transport, the new value overrides.
3865 . A regular expression is available for excluding directories from the
3868 20. The autoreply transport checks the characters in options that define the
3869 message's headers; it allows continued headers, but it was checking with
3870 isspace() after an embedded newline instead of explicitly looking for a
3873 21. If all the "regular" hosts to which an address was routed had passed their
3874 expiry times, and had not reached their retry times, the address was
3875 bounced, even if fallback hosts were defined. Now Exim should go on to try
3878 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3879 equivalent code in the SMTP transport. Some hosts send humungous responses
3880 to HELO/EHLO, more than 1024 it seems.
3882 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3883 gives compiler warnings in some environments. I've now done it "properly",
3886 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3887 (because of problems with the built-in one) was declared to return uschar *
3888 instead of char *, causing compiler failure.
3890 25. Fixed a file descriptor leak when processing alias/forward files.
3892 26. Fixed a minor format string issue in dbfn.c.
3894 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3896 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3897 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3900 29. When a sender address is verified, it is cached, to save repeating the test
3901 when there is more than one recipient in a message. However, when the
3902 verification involves a callout, it is possible for different callout
3903 options to be set for different recipients. It is too complicated to keep
3904 track of this in the cache, so now Exim always runs a verification when a
3905 callout is required, relying on the callout cache for the optimization.
3906 The overhead is duplication of the address routing, but this should not be
3909 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3910 to be verified with callout=postmaster, and the main callout worked but the
3911 postmaster check failed, the verification correctly failed. However, if a
3912 subsequent RCPT command asked for sender verification *without* the
3913 postmaster check, incorrect caching caused this verification also to fail,
3916 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3917 it was not caching the DNS options (qualify_single, search_parents) that
3918 were used when the lookup failed. A subsequent lookup with different
3919 options therefore always gave the same answer, though there were cases
3920 where it should not have. (Example: a "domains = !$mx_any" option on a
3921 dnslookup router: the "domains" option is always processed without any
3922 widening, but the router might have qualify_single set.) Now Exim uses the
3923 cached value only when the same options are set.
3925 32. Added John Jetmore's "exipick" utility to the distribution.
3927 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3928 than a timeout (e.g. a certificate is required, and is not provided), an
3929 Exim server now closes the connection immediately. Previously it waited for
3930 the client to close - but if the client is SSL, it seems that they each
3931 wait for each other, leading to a delay before one of them times out.
3933 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3934 maintained 0.8.x compatibility because I don't think many are using it, and
3935 it is clearly obsolete.
3937 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3940 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3941 client certificate was expired. A simple patch fixes this, though I don't
3942 understand the full logic of why the verify callback is called multiple
3945 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3946 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3947 which causes problems with some clients (such as the Certicom SSL Plus
3948 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3949 disables the coutermeasure allowing Eudora to connect."
3951 38. Exim was not checking that a write() to a log file succeeded. This could
3952 lead to Bad Things if a log got too big, in particular if it hit a file
3953 size limit. Exim now panics and dies if it cannot write to a log file, just
3954 as it does if it cannot open a log file.
3956 39. Modified OS/Makefile-Linux so that it now contains
3958 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3960 The two -D definitions ensure that Exim is compiled with large file
3961 support, which makes it possible to handle log files that are bigger than
3964 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3965 instance) a domain was checked against a named list that involved a lookup,
3966 causing $domain_data to be set, then another domain was checked against the
3967 same list, then the first domain was re-checked, the value of $domain_data
3968 after the final check could be wrong. In particular, if the second check
3969 failed, it could be set empty. This bug probably also applied to
3972 41. The strip_trailing_dot option was not being applied to the address given
3973 with the -f command-line option.
3975 42. The code for reading a message's header from the spool was incrementing
3976 $received_count, but never initializing it. This meant that the value was
3977 incorrect (doubled) while delivering a message in the same process in which
3978 it was received. In the most common configuration of Exim, this never
3979 happens - a fresh exec is done - but it can happen when
3980 deliver_drop_privilege is set.
3982 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3983 it now includes up to 150 characters of the unexpected data in the log
3986 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3987 and building data strings. The size of both of these buffers was 10 000
3988 bytes - far larger than anybody would *ever* want, thought I. Needless to
3989 say, somebody hit the limit. I have increased the maximum line length to
3990 20 000 and the maximum data length of concatenated lines to 100 000. I have
3991 also fixed two bugs, because there was no checking on these buffers. Tsk,
3992 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3993 buffer is too small.
3995 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3996 lsearch lookups. Now it does.
3998 46. When parsing a route_list item in a manualroute router, a fixed-length
3999 buffer was used for the list of hosts. I made this 1024 bytes long,
4000 thinking that nobody would ever have a list of hosts that long. Wrong.
4001 Somebody had a whole pile of complicated expansion conditions, and the
4002 string was silently truncated, leading to an expansion error. It turns out
4003 that it is easier to change to an unlimited length (owing to other changes
4004 that have happened since this code was originally written) than to build
4005 structure for giving a limitation error. The length of the item that
4006 expands into the list of hosts is now unlimited.
4008 47. The lsearch lookup could not handle data where the length of text line was
4009 more than 4095 characters. Such lines were truncated, leading to shortened
4010 data being returned. It should now handle lines of any length.
4012 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4013 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4016 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4017 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4018 no longer happens in comment lines. A list of replacements is now placed
4019 at the head of all of the source files, except those whose only change is
4020 to replace PERL_COMMAND in the very first #! line.
4022 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4023 messages on the queue, with a bottom-up merge sort, using code contributed
4024 by Michael Haardt. This should make operations like -bp somewhat faster on
4025 large queues. It won't affect queue runners, except when queue_run_in_order
4028 51. Installed eximstats 1.31 in the distribution.
4030 52. Added support for SRV lookups to the dnslookup router.
4032 53. If an ACL referred to $message_body or $message_body_end, the value was not
4033 reset for any messages that followed in the same SMTP session.
4035 54. The store-handling optimization for building very long strings was not
4036 differentiating between the different store pools. I don't think this
4037 actually made any difference in practice, but I've tidied it.
4039 55. While running the routers to verify a sender address, $sender_address
4040 was still set to the sender address. This is wrong, because when routing to
4041 send a bounce to the sender, it would be empty. Therefore, I have changed
4042 it so that, while verifying a sender address, $sender_address is set to <>.
4043 (There is no change to what happens when verifying a recipient address.)
4045 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4046 target A or AAAA records (if not already returned) without resetting the
4047 qualify_single or search_parents options of the DNS resolver. These are
4048 inappropriate in this case because the targets of MX and SRV records must
4049 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4050 target that, when qualified, matched something in the local domain. These
4051 two options are now turned off when doing these lookups.
4053 57. It seems that at least some releases of Reiserfs (which does not have the
4054 concept of a fixed number of inodes) returns zero and not -1 for the
4055 number of available inodes. This interacted badly with check_spool_inodes,
4056 which assumed that -1 was the "no such thing" setting. What I have done is
4057 to check that the total number of inodes is greater than zero before doing
4058 the test of how many are available.
4060 58. When a "warn" ACL statement has a log_message modifier, the message is
4061 remembered, and not repeated. This is to avoid a lot of repetition when a
4062 message has many recipients that cause the same warning to be written.
4063 Howewer, Exim was preserving the list of already written lines for an
4064 entire SMTP session, which doesn't seem right. The memory is now reset if a
4065 new message is started.
4067 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4068 debugging output unless log_rewrite was also set.
4070 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4071 of (int)(handle) when we know that handle contains (void *)(-1).
4073 61. The Exim daemon panic-logs an error return when it closes the incoming
4074 connection. However "connection reset by peer" seems to be common, and
4075 isn't really an error worthy of noting specially, so that particular error
4078 62. When Exim is trying to find all the local interfaces, it used to panic and
4079 die if the ioctl to get the interface flags failed. However, it seems that
4080 on at least one OS (Solaris 9) it is possible to have an interface that is
4081 included in the list of interfaces, but for which you get a failure error
4082 for this call. This happens when the interface is not "plumbed" into a
4083 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4084 failure of the "get flags" call assumes that the interface is down.
4086 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4087 makes life easier for people who are doing arithmetic on fields extracted
4088 from dates, where you often get leading zeros that should not be
4089 interpreted as octal.
4091 64. Added qualify_domain to the redirect router, to override the global
4094 65. If a pathologically long header line contained very many addresses (the
4095 report of this problem mentioned 10 000) and each of them was rewritten,
4096 Exim could use up a very large amount of memory. (It kept on making new
4097 copies of the header line as it rewrote, and never released the old ones.)
4098 At the expense of a bit more processing, the header rewriting function has
4099 been changed so that it no longer eats memory in this way.
4101 66. The generation of the Received: header has been moved from the time that a
4102 message starts to be received, to the time that it finishes. The timestamp
4103 in the Received: header should now be very close to that of the <= log
4104 line. There are two side-effects of this change:
4106 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4107 logged header lines no longer include the local Received: line, because
4108 it has not yet been created. The same applies to a copy of the message
4109 that is returned to a non-SMTP sender when a message is rejected.
4111 (b) When a filter file is tested using -bf, no additional Received: header
4112 is added to the test message. After some thought, I decided that this
4115 This change does not affect the value of $received_for. It is still set
4116 after address rewriting, but before local_scan() is called.
4118 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4120 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4121 gave an unhelpful panic error message, and a defer error. I have managed to
4122 change this behaviour so that it now rejects any supplied certificate,
4123 which seems right, as the list of acceptable certificates is empty.
4125 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4126 gave an unhelpful defer error. I have not managed to make this reject any
4127 supplied certificates, but the error message it gives is "no certificate
4128 supplied", which is not helpful.
4130 70. exigrep's output now also includes lines that are not associated with any
4131 message, but which match the given pattern. Implemented by a patch from
4132 Martin Sluka, which also tidied up the Perl a bit.
4134 71. Recipient callout verification, like sender verification, was using <> in
4135 the MAIL FROM command. This isn't really the right thing, since the actual
4136 sender may affect whether the remote host accepts the recipient or not. I
4137 have changed it to use the actual sender in the callout; this means that
4138 the cache record is now keyed on a recipient/sender pair, not just the
4139 recipient address. There doesn't seem to be a real danger of callout loops,
4140 since a callout by the remote host to check the sender would use <>.
4141 [SEE ABOVE: changed after hitting problems.]
4143 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4144 temporary errors. However, in the case of such a code being given after
4145 the end of a data transmission (i.e. after ".") Exim was failing to write
4146 a retry record for the message. (Yes, there was some broken host that was
4147 actually sending 8xx at this point.)
4149 73. An unknown lookup type in a host list could cause Exim to panic-die when
4150 the list was checked. (An example that provoked this was putting <; in the
4151 middle of a list instead of at the start.) If this happened during a DATA
4152 ACL check, a -D file could be left lying around. This kind of configuration
4153 error no longer causes Exim to die; instead it causes a defer errror. The
4154 incident is still logged to the main and panic logs.
4156 74. Buglet left over from Exim 3 conversion. The message "too many messages
4157 in one connection" was written to the rejectlog but not the mainlog, except
4158 when address rewriting (yes!) was being logged.
4160 75. Added write_rejectlog option.
4162 76. When a system filter was run not as root (that is, when system_filter_user
4163 was set), the values of the $n variables were not being returned to the
4164 main process; thus, they were not subsequently available in the $sn
4167 77. Added +return_path_on_delivery log selector.
4169 78. A connection timeout was being treated differently from recipients deferred
4170 when testing hosts_max_try with a message that was older than the host's
4171 retry timeout. (The host should not be counted, thus allowing all hosts to
4172 be tried at least once before bouncing.) This may have been the cause of an
4173 occasionally reported bug whereby a message would remain on the queue
4174 longer than the retry timeout, but would be bounced if a delivery was
4175 forced. I say "may" because I never totally pinned down the problem;
4176 setting up timeout/retry tests is difficult. See also the next item.
4178 79. The ultimate address timeout was not being applied to errors that involved
4179 a combination of host plus message (for example, a timeout on a MAIL
4180 command). When an address resolved to a number of possible hosts, and they
4181 were not all tried for each delivery (e.g. because of hosts_max_try), a
4182 message could remain on the queue longer than the retry timeout.
4184 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4187 81. Fixed an obscure SMTP outgoing bug which required at least the following
4188 conditions: (a) there was another message waiting for the same server;
4189 (b) the server returned 5xx to all RCPT commands in the first message so
4190 that the message was not completed; (c) the server dropped the connection
4191 or gave a negative response to the RSET that Exim sends to abort the
4192 transaction. The observed case was a dropped connection after DATA that had
4193 been sent in pipelining mode. That is, the server had advertised PIPELINING
4194 but was not implementing it correctly. The effect of the bug was incorrect
4195 behaviour, such as trying another host, and this could lead to a crash.
4201 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4202 and daemon.c were passed as pointers to ints; they should have been
4203 pointers to socklen_t variables (which are typically unsigned ints).
4205 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4208 3. Fixed a really odd bug that affected only the testing scheme; patching a
4209 certain fixed string in the binary changed the value of another string that
4210 happened to be identical to the end of the original first string.
4212 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4213 name", it returns that address as the IP address. On some operating
4214 systems (e.g. Solaris), it also passes back the IP address string as the
4215 "host name". However, on others (e.g. Linux), it passes back an empty
4216 string. Exim wasn't checking for this, and was changing the host name to an
4217 empty string, assuming it had been canonicized.
4219 5. Although rare, it is permitted to have more than one PTR record for a given
4220 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4221 all the names associated with an address, because they do in Solaris.
4222 However, it seems that they do not in Linux for data that comes from the
4223 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4224 I found this out when I moved to a new Linux workstation and tried to run
4225 the Exim test suite.
4227 To get round this problem I have changed the code so that it now does its
4228 own call to the DNS to look up PTR records when searching for a host name.
4229 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4230 addresses that are only in /etc/hosts are still found.
4232 This behaviour is, however, controlled by an option called host_lookup_
4233 order, which defaults to "bydns:byaddr". If people want to use the other
4234 order, or indeed, just use one or the other means of lookup, they can
4235 specify it in this variable.
4237 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4238 some operating systems, this comes back from gethostbyaddr() as an empty
4239 string, and this is what Exim used to test for. However, it seems that in
4240 other systems, "." is yielded. Exim now tests for this case too.
4242 7. The values of check_spool_space and check_log_space are now held internally
4243 as a number of kilobytes instead of an absolute number of bytes. If a
4244 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4245 kilobyte. This means that much larger values can be stored.
4247 8. Exim monitor: an attempt to get the action menu when not actually pointing
4248 at a message produces an empty menu entitled "No message selected". This
4249 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4250 no entries in it ("Shell widget menu has zero width and/or height"). So I
4251 have added a single, blank menu entry in this case.
4253 9. Added ${quote_local_part.
4255 10. MIME decoding is now applied to the contents of Subject: header lines when
4258 11. Now that a reference to $sender_host_address automatically causes a reverse
4259 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4260 host lookup before query-style lookups in lists that might use this
4261 variable. This has therefore been abolished, and the "net-" prefix is no
4262 longer necessary for query-style lookups.
4264 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4265 have been a typo for LFLAGS, so it has been changed.
4267 13. The install script calls Exim with "-C /dev/null" in order to find the
4268 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4269 to be output. Howeve, since Exim outputs its version number before the
4270 error, it didn't break the script. It just looked ugly. I fixed this by
4271 always allowing "-C /dev/null" if the caller is root.
4273 14. Ignore overlarge ACL variable number when reading spool file - insurance
4274 against a later release with more variables having written the file.
4276 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4277 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4278 this, as well as the form without the "IPv6" on the front.
4280 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4281 OS/Makefile-Darwin file.
4283 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4284 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4286 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4287 variable. However, some OS use ints for inodes. I've added cast to long int
4288 to get rid of the compiler warning.
4290 19. I had forgotten to lock out "/../" in configuration file names when
4291 ALT_CONFIG_PREFIX was set.
4293 20. Routers used for verification do not need to specify transports. However,
4294 if such a router generated a host list, and callout was configured, Exim
4295 crashed, because it could not find a port number from the (non-existent)
4296 transport. It now assumes port 25 in this circumstance.
4298 21. Added the -t option to exigrep.
4300 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4301 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4302 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4303 them is set, LOOKUP_LSEARCH is forced.
4305 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4307 24. Added sender and host information to the "rejected by local_scan()" log
4308 line; previously there was no indication of these.
4310 25. Added .include_if_exists.
4312 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4313 Linux. It turns out that not all file systems support this. Apparently some
4314 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4315 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4316 not supported on the file descriptor, is now ignored when Exim is trying to
4317 sync a directory. This applies only to Linux.
4319 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4321 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4322 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4325 29. Added support for maildirsize files from supplied patch (modified a bit).
4327 30. The use of :fail: followed by an empty string could lead Exim to respond to
4328 sender verification failures with (e.g.):
4330 550 Verification failed for <xxx>
4331 550 Sender verify failed
4333 where the first response line was missing the '-' that indicates it is not
4334 the final line of the response.
4336 31. The loop for finding the name of the user that called Exim had a hardwired
4337 limit of 10; it now uses the value of finduser_retries, which is used for
4338 all other user lookups.
4340 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4343 33. Exim was neglecting to zero errno before one call of strtol() when
4344 expanding a string and expecting an integer value. On some systems this
4345 resulted in spurious "integer overflow" errors. Also, it was casting the
4346 result into an int without checking.
4348 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4349 did not work. The code looks as if it has *never* worked, though it appears
4350 to have been documented since at least releast 1.62. I have made it work.
4352 35. The "timeout_DNS" error in retry rules, also documented since at least
4353 1.62, also never worked. As it isn't clear exactly what this means, and
4354 clearly it isn't a major issue, I have abolished the feature by treating it
4355 as "timeout", and writing a warning to the main and panic logs.
4357 36. The display of retry rules for -brt wasn't always showing the error code
4360 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4361 timeout_connect_A, timeout_connect_MX.
4363 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4364 to the empty sender.
4366 39. The daemon was not analysing the content of -oX till after it had closed
4367 stderr and disconnected from the controlling terminal. This meant that any
4368 syntax errors were only noted on the panic log, and the return code from
4369 the command was 0. By re-arranging the code a little, I've made the
4370 decoding happen first, so such errors now appear on stderr, and the return
4371 code is 1. However, the actual setting up of the sockets still happens in
4372 the disconnected process, so errors there are still only recorded on the
4375 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4376 connections (as happens on some IP stacks) was logged at start up time as
4377 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4378 it from "IPv6 and IPv4", which means that two separate sockets are being
4381 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4382 says whether AF_INET or AF_INET6 was passed as an argument.
4384 42. Exiwhat output was messed up when time zones were included in log
4387 43. Exiwhat now gives more information about the daemon's listening ports,
4388 and whether -tls-on-connect was used.
4390 44. The "port" option of the smtp transport is now expanded.
4392 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4393 silently ignored. Now an error message is written to the main and panic
4396 46. There's a new ACL modifier called "logwrite" which writes to a log file
4397 as soon as it is encountered.
4399 47. Added $local_user_uid and $local_user_gid at routing time.
4401 48. Exim crashed when trying to verify a sender address that was being
4404 49. Exim was recognizing only a space character after ".include". It now also
4405 recognizes a tab character.
4407 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4408 extracting the relevant information from the specification. The man page no
4409 longer contains scrambled data for the -d option, and I've added a section
4410 at the front about calling Exim under different names.
4412 51. Added "extra_headers" argument to the "mail" command in filter files.
4414 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4417 53. Installed eximstats 1.29.
4419 54. Added transport_filter_timeout as a generic transport option.
4421 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4422 Cc: header lines. This was required by RFC 822, but it not required by RFC
4425 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4426 incoming messages that did not have them. Now it does so only if the
4427 message originates locally, that is, if there is no associated remote host
4428 address. When Resent- header lines are present, this applies to the Resent-
4429 lines rather than the non-Resent- lines.
4431 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4432 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4434 58. Messages for configuration errors now include the name of the main
4435 configuration file - useful now that there may be more than one file in a
4436 list (.included file names were always shown).
4438 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4439 for those rare installations that do not start the daemon as root or run it
4440 setuid root. I've cut out the call to initgroups() if the daemon is not
4443 60. The Exim user and group can now be bound into the binary as text strings
4444 that are looked up at the start of Exim's processing.
4446 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4448 62. Added $mailstore_basename variable.
4450 63. Installed patch to sieve.c from Michael Haardt.
4452 64. When Exim failed to open the panic log after failing to open the main log,
4453 the original message it was trying to log was written to stderr and debug
4454 output, but if they were not available (the usual case in production), it
4455 was lost. Now it is written to syslog before the two lines that record the
4456 failures to open the logs.
4458 65. Users' Exim filters run in subprocesses under the user's uid. It is
4459 possible for a "deliver" command or an alias in a "personal" command to
4460 provoke an address rewrite. If logging of address rewriting is configured,
4461 this fails because the process is not running as root or exim. There may be
4462 a better way of dealing with this, but for the moment (because 4.30 needs
4463 to be released), I have disabled address rewrite logging when running a
4464 filter in a non-root, non-exim process.
4470 1. The buildconfig auxiliary program wasn't quoting the value set for
4471 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4472 not defined. This bug was masked in 4.22 by the effect that was fixed in
4475 2. Some messages that were rejected after a message id was allocated were
4476 shown as "incomplete" by exigrep. It no longer does this for messages that
4477 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4479 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4480 have allow_domain_literals set, the ID did not get logged in the <= line.
4481 Domain literals are now always recognized in Message-ID: header lines.
4483 4. The first argument for a ${extract expansion item is the key name or field
4484 number. Leading and trailing spaces in this item were not being ignored,
4485 causing some misleading effects.
4487 5. When deliver_drop_privilege was set, single queue runner processes started
4488 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4489 same command in the process it spins off) were not dropping privilege.
4491 6. When the daemon running as "exim" started a queue runner, it always
4492 re-executed Exim in the spun-off process. This is a waste of effort when
4493 deliver_drop_privilege is set. The new process now just calls the
4494 queue-runner function directly.
4500 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4503 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4504 ignored. Though the use of -oP was forcing the writing of a pid file, it
4505 was always written to the default place.
4507 3. If the message "no IP address found for host xxxx" is generated during
4508 incoming verification, it is now followed by identification of the incoming
4509 connection (so you can more easily find what provoked it).
4511 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4513 5. Added some features to "harden" Exim a bit more against certain attacks:
4515 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4516 be put in Local/Makefile. This is like the never_users runtime option,
4517 but it cannot be overridden. The default setting is "root".
4519 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4520 prefix string with which any file named in a -C command line option
4523 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4524 is retained for -C and -D only if the caller of Exim is root. Without
4525 it, the exim user may also use -C and -D and retain privilege.
4527 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4528 command line option is disabled.
4530 6. Macro names set by the -D option must start with an upper case letter, just
4531 like macro names defined in the configuration file.
4533 7. Added "dereference=" facility to LDAP.
4535 8. Two instances of the typo "uknown" in the source files are fixed.
4537 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4538 the Configure-Makefile script screwed up while processing it.
4540 10. Incorporated PCRE 4.4.
4542 11. The SMTP synchronization check was not operating right at the start of an
4543 SMTP session. For example, it could not catch a HELO sent before the client
4544 waited for the greeting. There is now a check for outstanding input at the
4545 point when the greeting is written. Because of the duplex, asynchronous
4546 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4547 way, but not yet received, when the check is performed.
4549 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4550 on TCP/IP sockets, because this apparently causes some broken clients to
4553 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4554 unchanged) from the Cygwin maintainer.
4556 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4557 was supported instead of testing for mbx. Effectively a typo.
4559 15. The spa authenticator server code was not checking that the input it
4560 received was valid base64.
4562 16. The debug output line for the "set" modifier in ACLs was not showing the
4563 name of the variable that was being set.
4565 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4567 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4568 lookup on its own. Something else was needed to trigger the lookup. For
4569 example, a match in host_lookup or the need for a host name in a host list.
4570 Now, if $sender_host_name is referenced and the host name has not yet been
4571 looked up, a lookup is performed. If the lookup fails, the variable remains
4572 empty, and $host_lookup_failed is set to "1".
4574 19. Added "eqi" as a case-independent comparison operator.
4576 20. The saslauthd authentication condition could segfault if neither service
4577 nor realm was specified.
4579 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4580 error message that was logged was misleading, and incoming SMTP
4581 connections were dropped. The message is now more accurate, and temporary
4582 errors are given to SMTP connections.
4584 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4585 (except RSET) with a 421 error, until QUIT is received. However, it was
4586 failing to send a response to QUIT.
4588 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4589 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4590 ACL is now run after the helo_try_verify_hosts code.
4592 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4593 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4594 case-independent, so other case variants are also recognized). Apparently
4595 some systems use these upper case variants.
4597 25. If more than two messages were waiting for the same host, and a transport
4598 filter was specified for the transport, Exim sent two messages over the
4599 same TCP/IP connection, and then failed with "socket operation on non-
4600 socket" when it tried to send the third.
4602 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4604 27. The extern definition of crypt16() in expand.c was not being excluded when
4605 the OS had its own crypt16() function.
4607 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4608 as a preferred synonym for return_size_limit, both as an option and as an
4611 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4613 30. Changed the default configuration ACL to relax the local part checking rule
4614 for addresses that are not in any local domains. For these addresses,
4615 slashes and pipe symbols are allowed within local parts, but the sequence
4616 /../ is explicitly forbidden.
4618 31. SPA server authentication was not clearing the challenge buffer before
4621 32. log_message in a "warn" ACL statement was writing to the reject log as
4622 well as to the main log, which contradicts the documentation and doesn't
4623 seem right (because no rejection is happening). So I have stopped it.
4625 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4626 However, I am unable to do any testing of this.
4628 34. Fixed an infelicity in the appendfile transport. When checking directories
4629 for a mailbox, to see if any needed to be created, it was accidentally
4630 using path names with one or more superfluous leading slashes; tracing
4631 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4633 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4634 contents are added to the log line that is written for every discarded
4635 recipient. (Previously a log_message setting was ignored.)
4637 36. The ${quote: operator now quotes the string if it is empty.
4639 37. The install script runs exim in order to find its version number. If for
4640 some reason other than non-existence or emptiness, which it checks, it
4641 could not run './exim', it was installing it with an empty version number,
4642 i.e. as "exim-". This error state is now caught, and the installation is
4645 38. An argument was missing from the function that creates an error message
4646 when Exim fails to connect to the socket for saslauthd authentication.
4647 This could cause Exim to crash, or give a corrupted message.
4649 39. Added isip, isip4, and isip6 to ${if conditions.
4651 40. The ACL variables $acl_xx are now saved with the message, and can be
4652 accessed later in routers, transports, and filters.
4654 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4655 strings in the file are not string-expanded.
4657 42. If a MAIL command specified a SIZE value that was too large to fit into an
4658 int variable, the check against message_size_limit failed. Such values are
4659 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4660 day this will have to be increased, but I don't think I want to be around
4661 when emails are that large.
4668 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4669 iconv() is not standard in FreeBSD.
4671 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4672 IPv6 enabled. The observed symptom was a segmentation fault on return from
4673 the function os_common_find_running_interfaces() in src/os.c.
4675 3. In the check_special_case() function in daemon.c I had used "errno" as an
4676 argument name, which causes warnings on some systems. This was basically a
4677 typo, since it was named "eno" in the comments!
4679 4. The code that waits for the clock to tick (at a resolution of some fraction
4680 of a second) so as to ensure message-id uniqueness was always waiting for
4681 at least one whole tick, when it could have waited for less. [This is
4682 almost certainly not relevant at current processor speeds, where it is
4683 unlikely to ever wait at all. But we try to future-proof.]
4685 5. The function that sleeps for a time interval that includes fractions of a
4686 second contained a race. It did not block SIGALRM between setting the
4687 timer, and suspending (a couple of lines later). If the interval was short
4688 and the sigsuspend() was delayed until after it had expired, the suspension
4689 never ended. On busy systems this could lead to processes getting stuck for
4692 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4693 process, before it forks any delivery processes. The open lookup caching
4694 mechanism meant that the open file or database connection was passed into
4695 the delivery process. The problem was that delivery processes always tidy
4696 up cached lookup data. This could cause a problem for the next delivery
4697 process started by the queue runner, because the external queue runner
4698 process does not know about the closure. So the next delivery process
4699 still has data in the lookup cache. In the case of a file lookup, there was
4700 no problem because closing a file descriptor in a subprocess doesn't affect
4701 the parent. However, if the lookup was caching a connection to a database,
4702 the connection was closed, and the second delivery process was likely to
4703 see errors such as "PGSQL: query failed: server closed the connection
4704 unexpectedly". The problem has been fixed by closing all cached lookups
4705 in a queue runner before running a delivery process.
4707 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4708 seem to have the "const" qualifier which it has on other OS. I've
4711 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4712 *of the same type* (client or server) with the same public name that an
4713 error should be diagnosed.
4715 9. When Exim looked up a host name for an IP address, but failed to find the
4716 original IP address when looking up the host name (a safety check), it
4717 output the message "<ip address> does not match any IP for NULL", which was
4718 confusing, to say the least. The bug was that the host name should have
4719 appeared instead of "NULL".
4721 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4722 user that is built into the binary, and the -C or -D options is used, root
4723 privilege is dropped before the configuration file is read. In addition,
4724 logging is switched to stderr instead of the normal log files. If the
4725 configuration then re-defines the Exim user, the unprivileged environment
4726 is probably not what is expected, so Exim logs a panic warning message (but
4729 However, if deliver_drop_privilege is set, the unprivileged state may well
4730 be exactly what is intended, so the warning has been cut out in that case,
4731 and Exim is allowed to try to write to its normal log files.
4737 1. smtp_return_error_details was not giving details for temporary sender
4738 or receiver verification errors.
4740 2. Diagnose a configuration error if two authenticators have the same public
4743 3. Exim used not to create the message log file for a message until the first
4744 delivery attempt. This could be confusing when incoming messages were held
4745 for policy or load reasons. The message log file is now created at the time
4746 the message is received, and an initial "Received" line is written to it.
4748 4. The automatically generated man page for command line options had a minor
4749 bug that caused no ill effects; however, a more serious problem was that
4750 the procedure for building the man page automatically didn't always
4751 operate. Consequently, release 4.20 contains an out-of-date version. This
4752 shouldn't happen again.
4754 5. When building Exim with embedded Perl support, the script that builds the
4755 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4756 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4758 6. The freeze_tell option was not being used for messages that were frozen on
4759 arrival, either by an ACL or by local_scan().
4761 7. Added the smtp_incomplete_transaction log selector.
4763 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4764 was accepting AUTH without a new EHLO.
4766 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4767 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4770 10. Logging of TCP/IP connections (when configured) now happens in the main
4771 daemon process instead of the child process, so that the TCP/IP connection
4772 count is more accurate (but it can never be perfect).
4774 11. The use of "drop" in a nested ACL was not being handled correctly in the
4775 outer ACL. Now, if condition failure induced by the nested "drop" causes
4776 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4777 or "require"), the connection is dropped.
4779 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4780 that yield "discard" can now be used with an "accept" or a "discard" verb,
4781 but an error is generated for any others (because I can't see a useful way
4782 to define what should happen).
4784 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4785 are now processed in the same way as lines in the Exim configuration file.
4786 In particular, continuation lines are supported.
4788 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4790 15. Added -ti meaning -t -i.
4792 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4793 domains, and warn by logging if others are found.
4795 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4796 returned from GIFCONF when Exim is trying to find the list of interfaces on
4797 a host. The code in os.c has been modified to copy each ifreq to an aligned
4798 structure in all cases.
4800 Also, in some cases, the returned ifreq's were being copied to a 'struct
4801 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4802 means the last couple of bytes of an IPv6 address could be chopped if the
4803 ifreq contained only a normal sockaddr (14 bytes storage).
4805 18. Named domain lists were not supported in the hosts_treat_as_local option.
4806 An entry such as +xxxx was not recognized, and was treated as a literal
4809 19. Ensure that header lines added by a DATA ACL are included in the reject log
4810 if the ACL subsequently rejects the message.
4812 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4813 MD5 (which is deprecated).
4815 21. When testing a filter file using -bf, Exim was writing a message when it
4816 took the sender from a "From " line in the message, but it was not doing so
4817 when it took $return_path from a Return-Path: header line. It now does.
4819 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4820 with a valid header line field name (a series of printing characters
4821 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4823 23. Changed "disc" in the source to "disk" to conform to the documentation and
4824 the book and for uniformity.
4826 24. Ignore Sendmail's -Ooption=value command line item.
4828 25. When execve() failed while trying to run a command in a pipe transport,
4829 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4830 could be confused with a return value of 69 from the command itself. This
4831 has been changed to 127, the value the shell returns if it is asked to run
4832 a non-existent command. The wording for the related log line suggests a
4833 non-existent command as the problem.
4835 26. If received_header_text expands to an empty string, do not add a Received:
4836 header line to the message. (Well, it adds a token one on the spool, but
4837 marks it "old" so that it doesn't get used or transmitted.)
4839 27. Installed eximstats 1.28 (addition of -nt option).
4841 28. There was no check for failure on the call to getsockname() in the daemon
4842 code. This can fail if there is a shortage of resources on the system, with
4843 ENOMEM, for example. A temporary error is now given on failure.
4845 29. Contrary to the C standard, it seems that in some environments, the
4846 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4847 program. Exim now does this explicitly; it affects the formatting of
4848 timestamps using strftime().
4850 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4851 complaints. I've now initialized all the variables, to avoid this.
4853 32. Header lines added by a system filter were not being "seen" during
4854 transport-time rewrites.
4856 33. The info_callback() function passed to OpenSSL is set up with type void
4857 (*)(SSL *, int, int), as described somewhere. However, when calling the
4858 function (actually a macro) that sets it up, the type void(*)() is
4859 expected. I've put in a cast to prevent warnings from picky compilers.
4861 34. If a DNS black list lookup found a CNAME record, but there were no A
4862 records associated with the domain it pointed at, Exim crashed.
4864 35. If a DNS black list lookup returned more than one A record, Exim ignored
4865 all but the first. It now scans all returned addresses if a particular IP
4866 value is being sought. In this situation, the contents of the
4867 $dnslist_value variable are a list of all the addresses, separated by a
4870 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4871 to accept a host name and all its aliases if the forward lookup for any of
4872 them yielded the IP address of the incoming connection. Now it accepts only
4873 those names whose forward lookup yields the correct IP address. Any other
4874 names are discarded. This closes a loophole whereby a rogue DNS
4875 administrator could create reverse DNS records to break through a
4876 wildcarded host restriction in an ACL.
4878 37. If a user filter or a system filter that ran in a subprocess used any of
4879 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4880 the wrong values were passed to the pipe command ($thisaddress had the
4881 value of $0, $0 had the value of $1, etc). This bug was introduced by
4882 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4884 38. Improved the line breaking for long SMTP error messages from ACLs.
4885 Previously, if there was no break point between 40 and 75 characters, Exim
4886 left the rest of the message alone. Two changes have been made: (a) I've
4887 reduced the minimum length to 35 characters; (b) if it can't find a break
4888 point between 35 and 75 characters, it looks ahead and uses the first one
4889 that it finds. This may give the occasional overlong line, but at least the
4890 remaining text gets split now.
4892 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4893 file descriptors might be low, and that setting 1000 would always raise it.
4894 It turns out that in some environments, the limit is already over 1000 and
4895 that lowering it causes trouble. So now Exim takes care not to decrease it.
4897 40. When delivering a message, the value of $return_path is set to $sender_
4898 address at the start of routing (routers may change the value). By an
4899 oversight, this default was not being set up when an address was tested by
4900 -bt or -bv, which affected the outcome if any router or filter referred to
4903 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4904 log only when "message" or "log_message" are set. However, if one of the
4905 conditions was an address verification, or a call to a nested ACL, the
4906 messages generated by the underlying test were being passed through. This
4907 no longer happens. The underlying message is available in $acl_verify_
4908 message for both "message" and "log_message" expansions, so it can be
4909 passed through if needed.
4911 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4912 new expansion $bh_ to give the encoded byte string without charset
4913 translation. Translation happens only if iconv() is available; HAVE_ICONV
4914 indicates this at build time. HEADERS_CHARSET gives the charset to
4915 translate to; headers_charset can change it in the configuration, and
4916 "headers charset" can change it in an individual filter file.
4918 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4919 that creates RFC 2047 encoded "words" labels them as that charset instead
4920 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4921 expansion operator; (ii) when Exim creates a From: line for a local
4922 message; (iii) when a header line is rewritten to include a "phrase" part.
4924 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4925 buggy, causing it to skip the first lines of messages whose message ID
4926 ended in 'D'. This would not have bitten before Exim release 4.14, because
4927 message IDs were unlikely to end in 'D' before then. The effect was to have
4928 incorrect size information for certain domains.
4930 45. #include "config.h" was missing at the start of the crypt16.c module. This
4931 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4934 46. If there was a timeout during a "random" callout check, Exim treated it as
4935 a failure of the random address, and carried on sending RSET and the real
4936 address. If the delay was just some slowness somewhere, the response to the
4937 original RCPT would be taken as a response to RSET and so on, causing
4938 mayhem of various kinds.
4940 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4941 when I implemented it. It didn't allow for the fact that some option values
4942 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4943 the right test for positive values.
4945 48. Domain names in DNS records are case-independent. Exim always looks them up
4946 in lower case. Some resolvers return domain names in exactly the case they
4947 appear in the zone file, that is, they may contain uppercase letters. Not
4948 all resolvers do this - some return always lower case. Exim was treating a
4949 change of case by a resolver as a change of domain, similar to a widening
4950 of a domain abbreviation. This triggered its re-routing code and so it was
4951 trying to route what was effectively the same domain again. This normally
4952 caused routing to fail (because the router wouldn't handle the domain
4953 twice). Now Exim checks for this case specially, and just changes the
4954 casing of the domain that it ultimately uses when it transmits the message
4957 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4960 50. If a filter generated a file delivery with a non-absolute name (possible if
4961 no home directory exists for the router), the forbid_file option was not
4964 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4965 the existing equality matching.
4967 52. Exim was using ints instead of ino_t variables in some places where it was
4968 dealing with inode numbers.
4970 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4971 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4972 called TMPDIR, and if it finds it is different, it changes its value.
4974 54. The smtp_printf() function is now made available to local_scan() so
4975 additional output lines can be written before returning. There is also an
4976 smtp_fflush() function to enable the detection of a dropped connection.
4977 The variables smtp_input and smtp_batched_input are exported to
4980 55. Changed the default runtime configuration: the message "Unknown user"
4981 has been removed from the ACL, and instead placed on the localuser router,
4982 using the cannot_route_message feature. This means that any verification
4983 failures that generate their own messages won't get overridden. Similarly,
4984 the "Unrouteable address" message that was in the ACL for unverifiable
4985 relay addresses has also been removed.
4987 56. Added hosts_avoid_esmtp to the smtp transport.
4989 57. The exicyclog script was not checking for the esoteric option
4990 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4991 will work only if exicyclog is run under the appropriate euid.
4993 58. Following a discussion on the list, the rules by which Exim recognises line
4994 endings on incoming messages have been changed. The -dropcr and drop_cr
4995 options are now no-ops, retained only for backwards compatibility. The
4996 following line terminators are recognized: LF CRLF CR. However, special
4997 processing applies to CR:
4999 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5000 nor a local message in the state where . is a terminator.
5002 (ii) If a bare CR is encountered in a header line, an extra space is added
5003 after the line terminator so as not to end the header. The reasoning
5004 behind this is that bare CRs in header lines are most likely either
5005 to be mistakes, or people trying to play silly games.
5007 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5008 was being incorrectly given as 18 bytes larger than it should have been.
5009 This is a VOB (very old bug).
5011 60. This may never have affected anything current, but just in case it has:
5012 When the local host is found other than at the start of a list of hosts,
5013 the local host, those with the same MX, and any that follow, are discarded.
5014 When the list in question was part of a longer list of hosts, the following
5015 hosts (not currently being processed) were also being discarded. This no
5016 longer happens. I'm not sure if this situation could ever has previously
5019 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5022 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5023 header. This is something that is recommended in a new Internet Draft, and
5024 is something that is documented as being done by Sendmail. There are two
5025 possible values. For messages generated by the autoreply transport, Exim
5028 Auto-Submitted: auto-replied
5030 whereas for all other generated messages (e.g. bounces) it adds
5032 Auto-Submitted: auto-generated
5034 63. The "personal" condition in filters now includes a test for the
5035 Auto-Submitted: header. If it contains the string "auto-" the message it
5036 not considered personal.
5038 64. Added rcpt_include_affixes as a generic transport option.
5040 65. Added queue_only_override (default true).
5042 66. Added the syslog_duplication option.
5044 67. If what should have been the first header line of a message consisted of
5045 a space followed by a colon, Exim was mis-interpreting it as a header line.
5046 It isn't of course - it is syntactically invalid and should therefore be
5047 treated as the start of the message body. The misbehaviour could have
5048 caused a number of strange effects, including loss of data in subsequent
5049 header lines, and spool format errors.
5051 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5052 client host had authenticated. This control can now be exercised by an ACL
5053 for more flexibility.
5055 69. By default, callouts do not happen when testing with -bh. There is now a
5056 variant, -bhc, which does actually run the callout code, including
5057 consulting and updating the callout cache.
5059 70. Added support for saslauthd authentication, courtesy of Alexander
5062 71. If statvfs() failed on the spool or log directories while checking their
5063 size for availability, Exim confusingly gave the error "space shortage".
5064 Furthermore, in debugging mode it crashed with a floating point exception.
5065 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5066 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5067 serious problem, Exim now writes to the main and panic logs when this
5068 happens, with details of the failure. It then refuses to accept the
5069 incoming message, giving the message "spool directory problem" or "log
5070 directory problem" with a 421 code for SMTP messages.
5072 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5073 0, 1, and 2 exist, because some OS complain for execs without them (see
5074 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5075 descriptors. However, the code omitted to check that the open succeeded,
5076 causing mysterious errors if for some reason the permissions on /dev/null
5077 got screwed. Now Exim writes a message to the main and panic logs, and
5078 bombs out if it can't open /dev/null.
5080 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5081 interact so that it is all more flexible. It is supposed to remain
5082 backwards compatible. Also added extra_local_interfaces.
5084 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5085 to bomb out with an assertion failure - to the client this appears as a
5086 connection drop. This problem occurs in the part of the code that was taken
5087 from the Samba project. Fortunately, the assertion is in a very simple
5088 function, so I have fixed this by reproducing the function inline in the
5089 one place where it is called, and arranging for authentication to fail
5090 instead of killing the process with assert().
5092 75. The SPA client code was not working when the server requested OEM rather
5093 than Unicode encoding.
5095 76. Added code to make require_files with a specific uid setting more usable in
5096 the case where statting the file as root fails - usually a non-root-mounted
5097 NFS file system. When this happens and the failure is EACCES, Exim now
5098 forks a subprocess and does the per-uid checking as the relevant uid.
5100 77. Added process_log_path.
5102 78. If log_file_path was not explicitly set, a setting of check_log_space or
5103 check_log_inodes was ignored.
5105 79. If a space check for the spool or log partitions fails, the incident is now
5106 logged. Of course, in the latter case the data may get lost...
5108 80. Added the %p formatting code to string_format() so that it can be used to
5109 print addresses in debug_print(). Adjusted all the address printing in the
5110 debugging in store.c to use %p rather than %d.
5112 81. There was a concern that a line of code in smtp_in.c could overflow a
5113 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5114 initially expressed, the concern was not well-founded, because trailing
5115 spaces are removed early. However, if the trailing spaces were followed by
5116 a NULL, they did not get removed, so the overflow was possible. Two fixes
5119 (a) I re-wrote the offending code in a cleaner fashion.
5120 (b) If an incoming SMTP command contains a NULL character, it is rejected
5123 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5124 runs initgroups(), so that if the Exim user is in any additional groups,
5125 they will be used during message reception.
5131 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob