1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.626 2010/06/06 02:46:13 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_codedump 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 (I believe), leading to a segfault because of
28 an 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.
49 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
50 $data_path, and $header_path variables; fixed documentation bugs and
53 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
54 exipick to access non-standard spools, including the "frozen" queue
57 NM/01 Bugzilla 965: Support mysql stored procedures.
58 Patch from Alain Williams
60 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
62 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
63 Patch from Andreas Metzler
65 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
66 Patch from Kirill Miazine
68 NM/05 Bugzilla 671: Added umask to procmail example.
70 JJ/03 installed exipick 20100323.0, fixing doc bug
72 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
73 directory. Notification and patch from Dan Rosenberg.
75 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
77 TK/02 Improve log output when DKIM signing operation fails.
79 MH/01 Treat the transport option dkim_domain as a colon separated
80 list, not as a single string, and sign the message with each element,
81 omitting multiple occurences of the same signer.
83 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
84 Bugzilla 985, 986. Patch by Simon Arlott
86 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
89 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
90 MBX locking. Notification from Dan Rosenberg.
96 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
98 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
100 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
102 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
104 NM/04 Bugzilla 915: Flag broken perl installation during build.
110 TK/01 Added patch by Johannes Berg that expands the main option
111 "spamd_address" if it starts with a dollar sign.
113 TK/02 Write list of recipients to X-Envelope-Sender header when building
114 the mbox-format spool file for content scanning (suggested by Jakob
117 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
118 (http://www.dcc-servers.net/) support via dccifd. Activated by
119 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
121 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
122 by Mark Daniel Reidel <mr@df.eu>.
124 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
125 When building exim an external PCRE library is now needed -
126 PCRE is a system library on the majority of modern systems.
127 See entry on PCRE_LIBS in EDITME file.
129 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
130 conversation. Added nologin parameter to request.
131 Patch contributed by Kirill Miazine.
133 TF/01 Do not log submission mode rewrites if they do not change the address.
135 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
137 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
138 log files in place. Contributed by Roberto Lima.
140 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
142 TF/03 Bugzilla 615: When checking the local_parts router precondition
143 after a local_part_suffix or local_part_prefix option, Exim now
144 does not use the address's named list lookup cache, since this
145 contains cached lookups for the whole local part.
147 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
148 Robert Millan. Documentation is in experimental-spec.txt.
150 TF/04 Bugzilla 668: Fix parallel build (make -j).
152 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
154 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
155 Patch provided by Jan Srzednicki.
157 TF/05 Leading white space used to be stripped from $spam_report which
158 wrecked the formatting. Now it is preserved.
160 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
161 that they are available at delivery time.
163 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
165 TF/08 TLS error reporting now respects the incoming_interface and
166 incoming_port log selectors.
168 TF/09 Produce a more useful error message if an SMTP transport's hosts
169 setting expands to an empty string.
171 NM/06 Bugzilla 744: EXPN did not work under TLS.
172 Patch provided by Phil Pennock.
174 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
175 Patch provided by Richard Godbee.
177 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
178 acl_smtp_notquit, added index entry.
180 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
181 Patch provided by Eugene Bujak.
183 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
184 accept(). Patch provided by Maxim Dounin.
186 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
187 Patch provided by Phil Pennock.
189 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
191 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
192 Patch provided by Brad "anomie" Jorsch.
194 NM/14 Bugzilla 622: Added timeout setting to transport filter.
195 Patch provided by Dean Brooks.
197 TK/05 Add native DKIM support (does not depend on external libraries).
199 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
200 Patch provided by Graeme Fowler.
202 NM/16 Bugzilla 851: Documentation example syntax fix.
204 NM/17 Changed NOTICE file to remove references to embedded PCRE.
206 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
209 NM/19 Bugzilla 745: TLS version reporting.
210 Patch provided by Phil Pennock.
212 NM/20 Bugzilla 167: bool: condition support.
213 Patch provided by Phil Pennock.
215 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
216 clients. Patch provided by Phil Pennock.
218 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
219 Patch provided by Brad "anomie" Jorsch.
221 NM/23 Bugzilla 687: Fix misparses in eximstats.
222 Patch provided by Heiko Schlittermann.
224 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
225 Patch provided by Heiko Schlittermann.
227 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
228 plus update to original patch.
230 NM/26 Bugzilla 799: Documentation correction for ratelimit.
232 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
233 Patch provided by David Brownlee.
235 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
237 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
239 NM/30 Bugzilla 888: TLS documentation bugfixes.
241 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
243 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
244 Unlike the original bugzilla I have changed all shell scripts in src tree.
246 NM/33 Bugzilla 898: Transport filter timeout fix.
247 Patch by Todd Rinaldo.
249 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
250 Patch by Serge Demonchaux.
252 NM/35 Bugzilla 39: Base64 decode bug fixes.
253 Patch by Jakob Hirsch.
255 NM/36 Bugzilla 909: Correct connect() call in dcc code.
257 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
259 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
261 NM/39 Bugzilla 911: Fixed MakeLinks build script.
267 TK/01 Add preliminary DKIM support. Currently requires a forked version of
268 ALT-N's libdkim that I have put here:
269 http://duncanthrax.net/exim-experimental/
271 Note to Michael Haardt: I had to rename some vars in sieve.c. They
272 were called 'true' and it seems that C99 defines that as a reserved
273 keyword to be used with 'bool' variable types. That means you could
274 not include C99-style headers which use bools without triggering
275 build errors in sieve.c.
277 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
278 as mailq or other aliases. Changed the --help handling significantly
279 to do whats expected. exim_usage() emits usage/help information.
281 SC/01 Added the -bylocaldomain option to eximstats.
283 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
285 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
287 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
293 PH/01 Another patch from the Sieve maintainer.
295 PH/02 When an IPv6 address is converted to a string for single-key lookup
296 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
297 dots are used instead of colons so that keys in lsearch files need not
298 contain colons. This was done some time before quoting was made available
299 in lsearch files. However, iplsearch files do require colons in IPv6 keys
300 (notated using the quote facility) so as to distinguish them from IPv4
301 keys. This meant that lookups for IP addresses in host lists did not work
302 for iplsearch lookups.
304 This has been fixed by arranging for IPv6 addresses to be expressed with
305 colons if the lookup type is iplsearch. This is not incompatible, because
306 previously such lookups could never work.
308 The situation is now rather anomolous, since one *can* have colons in
309 ordinary lsearch keys. However, making the change in all cases is
310 incompatible and would probably break a number of configurations.
312 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
315 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
316 conversion specification without a maximum field width, thereby enabling
317 a rogue spamd server to cause a buffer overflow. While nobody in their
318 right mind would setup Exim to query an untrusted spamd server, an
319 attacker that gains access to a server running spamd could potentially
320 exploit this vulnerability to run arbitrary code as the Exim user.
322 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
323 $primary_hostname instead of what libspf2 thinks the hosts name is.
325 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
326 a directory entry by the name of the lookup key. Previously, if a
327 symlink pointed to a non-existing file or a file in a directory that
328 Exim lacked permissions to read, a lookup for a key matching that
329 symlink would fail. Now it is enough that a matching directory entry
330 exists, symlink or not. (Bugzilla 503.)
332 PH/03 The body_linecount and body_zerocount variables are now exported in the
335 PH/04 Added the $dnslist_matched variable.
337 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
338 This means they are set thereafter only if the connection becomes
341 PH/06 Added the client_condition to authenticators so that some can be skipped
342 by clients under certain conditions.
344 PH/07 The error message for a badly-placed control=no_multiline_responses left
345 "_responses" off the end of the name.
347 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
349 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
350 (without spaces) instead of just copying the configuration text.
352 PH/10 Added the /noupdate option to the ratelimit ACL condition.
354 PH/11 Added $max_received_linelength.
356 PH/12 Added +ignore_defer and +include_defer to host lists.
358 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
359 way in which PCRE > 7.0 is built.
361 PH/14 Implemented queue_only_load_latch.
363 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
364 MAIL command. The effect was to mangle the value on 64-bit systems.
366 PH/16 Another patch from the Sieve maintainer.
368 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
370 PH/18 If a system quota error occurred while trying to create the file for
371 a maildir delivery, the message "Mailbox is full" was not appended to the
372 bounce if the delivery eventually timed out. Change 4.67/27 below applied
373 only to a quota excession during the actual writing of the file.
375 PH/19 It seems that peer DN values may contain newlines (and other non-printing
376 characters?) which causes problems in log lines. The DN values are now
377 passed through string_printing() before being added to log lines.
379 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
380 and InterBase are left for another time.)
382 PH/21 Added message_body_newlines option.
384 PH/22 Guard against possible overflow in moan_check_errorcopy().
386 PH/23 POSIX allows open() to be a macro; guard against that.
388 PH/24 If the recipient of an error message contained an @ in the local part
389 (suitably quoted, of course), incorrect values were put in $domain and
390 $local_part during the evaluation of errors_copy.
396 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
397 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
400 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
401 issue a MAIL command.
403 PH/02 In an ACL statement such as
405 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
407 if a client was not listed at all, or was listed with a value other than
408 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
409 the condition was not true (as it should be), so access was not denied.
410 The bug was that the ! inversion was incorrectly passed on to the second
411 item. This has been fixed.
413 PH/03 Added additional dnslists conditions == and =& which are different from
414 = and & when the dns lookup returns more than one IP address.
416 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
417 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
419 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
420 FSYNC, which compiles an option called disable_fsync that allows for
421 bypassing fsync(). The documentation is heavily laced with warnings.
423 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
425 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
426 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
427 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
428 including adding "make clean"; (3) Added -fPIC when compiling the test
429 dynamically loaded module, to get rid of a warning.
431 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
432 message fails, move_frozen_messages = true and ignore_bounce_errors_after
433 = 0s. The bug is otherwise harmless.
435 PH/07 There was a bug in the dovecot authenticator such that the value of
436 $auth1 could be overwritten, and so not correctly preserved, after a
437 successful authentication. This usually meant that the value preserved by
438 the server_setid option was incorrect.
440 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
442 PH/09 Installed PCRE release 7.0.
444 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
445 run for batched SMTP input. It is now run at the start of every message
446 in the batch. While fixing this I discovered that the process information
447 (output by running exiwhat) was not always getting set for -bs and -bS
448 input. This is fixed, and it now also says "batched" for BSMTP.
450 PH/11 Added control=no_pipelining.
452 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
453 patch, slightly modified), and move the expansion of helo_data till after
454 the connection is made in the smtp transport (so it can use these
457 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
459 PH/14 Added log_selector = +pid.
461 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
463 PH/16 Add ${if forany and ${if forall.
465 PH/17 Added dsn_from option to vary the From: line in DSNs.
467 PH/18 Flush SMTP output before performing a callout, unless control =
468 no_callout_flush is set.
470 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
471 was true (the default) a successful delivery failed to delete the retry
472 item, thus causing premature timeout of the address. The bug is now
475 PH/20 Added hosts_avoid_pipelining to the smtp transport.
477 PH/21 Long custom messages for fakedefer and fakereject are now split up
478 into multiline reponses in the same way that messages for "deny" and
479 other ACL rejections are.
481 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
482 with slight modification.
484 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
485 draft, changing the syntax and factoring some duplicate code".
487 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
488 for deliveries of the second and subsequent messages over the same SMTP
491 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
492 ${reduce, with only minor "tidies".
494 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
496 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
497 expansion side effects.
499 PH/27 When a message times out after an over-quota error from an Exim-imposed
500 quota, the bounce message says "mailbox is full". This message was not
501 being given when it was a system quota that was exceeded. It now should
504 MH/03 Made $recipients available in local_scan(). local_scan() already has
505 better access to the recipient list through recipients_list[], but
506 $recipients can be useful in postmaster-provided expansion strings.
508 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
509 in the case of a MAIL command with additional options following the
510 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
511 were accidentally chopped off.
513 PH/29 SMTP synchronization checks are implemented when a command is read -
514 there is a check that no more input is waiting when there shouldn't be
515 any. However, for some commands, a delay in an ACL can mean that it is
516 some time before the response is written. In this time, more input might
517 arrive, invalidly. So now there are extra checks after an ACL has run for
518 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
519 pipelining has not been advertised.
521 PH/30 MH's patch to allow iscntrl() characters to be list separators.
523 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
524 returned in the SMTP response when smtp_return_error_details was false.
527 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
528 instead of the C I/O that was originally supplied, because problems were
531 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
532 Exim which did not show up earlier: it was assuming that a call to
533 SSL_CTX_set_info_callback() might give an error value. In fact, there is
534 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
535 was a macro that became an assignment, so it seemed to work. This has
536 changed to a proper function call with a void return, hence the compile
537 error. Exim's code has been fixed.
539 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
542 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
544 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
546 PH/37 If a message is not accepted after it has had an id assigned (e.g.
547 because it turns out to be too big or there is a timeout) there is no
548 "Completed" line in the log. When some messages of this type were
549 selected by exigrep, they were listed as "not completed". Others were
550 picked up by some special patterns. I have improved the selection
551 criteria to be more general.
553 PH/38 The host_find_failed option in the manualroute router can now be set
554 to "ignore", to completely ignore a host whose IP address cannot be
555 found. If all hosts are ignored, the behaviour is controlled by the new
556 host_all_ignored option.
558 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
559 homing or because of multiple MX records with /mx) generated more than
560 one IP address, and the following item turned out to be the local host,
561 all the secondary addresses of the first item were incorrectly removed
562 from the list, along with the local host and any following hosts (which
563 is what is supposed to happen).
565 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
566 whoever called Exim into the -H file. In the case of the daemon it was
567 behaving confusingly. When first started, it used values for whoever
568 started the daemon, but after a SIGHUP it used the Exim user (because it
569 calls itself on a restart). I have changed the code so that it now always
572 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
573 message are rejected with the same error (e.g. no authentication or bad
574 sender address), and a DATA command is nevertheless sent (as can happen
575 with PIPELINING or a stupid MUA), the error message that was given to the
576 RCPT commands is included in the rejection of the DATA command. This is
577 intended to be helpful for MUAs that show only the final error to their
580 PH/42 Another patch from the Sieve maintainer.
582 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
583 Eximstats - Fixed some broken HTML links and added missing column headers
585 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
586 columns for Rejects, Temp Rejects, Ham, and Spam rows.
588 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
590 PH/43 Yet another patch from the Sieve maintainer.
592 PH/44 I found a way to check for a TCP/IP connection going away before sending
593 the response to the final '.' that terminates a message, but only in the
594 case where the client has not sent further data following the '.'
595 (unfortunately, this is allowed). However, in many cases there won't be
596 any further data because there won't be any more messages to send. A call
597 to select() can be used: if it shows that the input is "ready", there is
598 either input waiting, or the socket has been closed. An attempt to read
599 the next input character can distinguish the two cases. Previously, Exim
600 would have sent an OK response which the client would never have see.
601 This could lead to message repetition. This fix should cure that, at
602 least in a lot of common cases.
604 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
605 advertised in response to EHLO.
611 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
612 fixed by 4.65/MH/01 (is this a record?) are fixed:
614 (i) An empty string was always treated as zero by the numeric comparison
615 operators. This behaviour has been restored.
617 (ii) It is documented that the numeric comparison operators always treat
618 their arguments as decimal numbers. This was broken in that numbers
619 starting with 0 were being interpreted as octal.
621 While fixing these problems I realized that there was another issue that
622 hadn't been noticed. Values of message_size_limit (both the global option
623 and the transport option) were treated as octal if they started with 0.
624 The documentation was vague. These values are now always treated as
625 decimal, and I will make that clear in the documentation.
631 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
632 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
635 MH/01 Don't check that the operands of numeric comparison operators are
636 integers when their expansion is in "skipping" mode (fixes bug
637 introduced by 4.64-PH/07).
639 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
640 child addresses, Exim now panics and dies. Previously, because the count
641 is held in a short int, deliveries were likely to be lost. As such a
642 large number of recipients for a single message is ridiculous
643 (performance will be very, very poor), I have chosen to impose a limit
644 rather than extend the field.
650 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
651 leftover -K file (the existence of which was triggered by #402).
652 While we were at it, introduced process PID as part of the -K
653 filename. This should rule out race conditions when creating
656 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
657 processing considerably. Previous code took too long for large mails,
658 triggering a timeout which in turn triggers #401.
660 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
661 in the DK code in transports.c. sendfile() is not really portable,
662 hence the _LINUX specificness.
664 TF/01 In the add_headers option to the mail command in an Exim filter,
665 there was a bug that Exim would claim a syntax error in any
666 header after the first one which had an odd number of characters
669 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
670 callout verification, Exim cached a "reject" for the entire domain. This
671 is correct for most verifications, but it is not correct for a recipient
672 verification with use_sender or use_postmaster set, because in that case
673 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
674 case of MAIL FROM:<> rejection from other early rejections (e.g.
675 rejection of HELO). When verifying a recipient using a non-null MAIL
676 address, the cache is ignored if it shows MAIL FROM:<> rejection.
677 Whatever the result of the callout, the value of the domain cache is
678 left unchanged (for any other kind of callout, getting as far as trying
679 RCPT means that the domain itself is ok).
681 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
684 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
685 manifest itself as EPIPE rather than ECONNECT. When tidying away a
686 session, the daemon ignores ECONNECT errors and logs others; it now
687 ignores EPIPE as well.
689 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
690 (quoted-printable decoding).
692 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
693 later the small subsequent patch to fix an introduced bug.
695 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
697 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
699 PH/08 An error is now given if message_size_limit is specified negative.
701 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
702 to be given (somewhat) arbitrary names.
704 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
707 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
708 miscellaneous code fixes
710 PH/10 Added the log_reject_target ACL modifier to specify where to log
713 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
714 hostname. This is wrong, because it relates to the incoming message (and
715 probably the interface on which it is arriving) and not to the outgoing
716 callout (which could be using a different interface). This has been
717 changed to use the value of the helo_data option from the smtp transport
718 instead - this is what is used when a message is actually being sent. If
719 there is no remote transport (possible with a router that sets up host
720 addresses), $smtp_active_hostname is used.
722 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
723 tweaks were necessary in order to get it to work (see also 21 below):
724 (a) The code assumed that strncpy() returns a negative number on buffer
725 overflow, which isn't the case. Replaced with Exim's string_format()
727 (b) There were several signed/unsigned issues. I just did the minimum
728 hacking in of casts. There is scope for a larger refactoring.
729 (c) The code used strcasecmp() which is not a standard C function.
730 Replaced with Exim's strcmpic() function.
731 (d) The code set only $1; it now sets $auth1 as well.
732 (e) A simple test gave the error "authentication client didn't specify
733 service in request". It would seem that Dovecot has changed its
734 interface. Fortunately there's a specification; I followed it and
735 changed what the client sends and it appears to be working now.
737 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
740 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
741 address A is aliased to B and C, where B exists and C does not. Without
742 -v the output is "A verified" because verification stops after a
743 successful redirection if more than one address is generated. However,
744 with -v the child addresses are also verified. Exim was outputting "A
745 failed to verify" and then showing the successful verification for C,
746 with its parentage. It now outputs "B failed to verify", showing B's
747 parentage before showing the successful verification of C.
749 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
750 look up a TXT record in a specific list after matching in a combined
753 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
754 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
755 they consult the DNS. I had assumed they would set it the way they
756 wanted; and indeed my experiments on Linux seem to show that in some
757 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
758 To be on the safe side, however, I have now made the interface to
759 host_find_byname() similar to host_find_bydns(), with an argument
760 containing the DNS resolver options. The host_find_byname() function now
761 sets these options at its start, just as host_find_bydns() does. The smtp
762 transport options dns_qualify_single and dns_search_parents are passed to
763 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
764 of host_find_byname() use the default settings of RES_DEFNAMES
765 (qualify_single) but not RES_DNSRCH (search_parents).
767 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
768 spool_read_header() do less string testing, by means of a preliminary
769 switch on the second character of optional "-foo" lines. (This is
770 overdue, caused by the large number of possibilities that now exist.
771 Originally there were few.) While I was there, I also converted the
772 str(n)cmp tests so they don't re-test the leading "-" and the first
773 character, in the hope this might squeeze out yet more improvement.
775 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
776 flag allowing group syntax was set by the header_syntax check but not
777 turned off, possible causing trouble later; (2) The flag was not being
778 set at all for the header_verify test, causing "group"-style headers to
779 be rejected. I have now set it in this case, and also caused header_
780 verify to ignore an empty address taken from a group. While doing this, I
781 came across some other cases where the code for allowing group syntax
782 while scanning a header line wasn't quite right (mostly, not resetting
783 the flag correctly in the right place). These bugs could have caused
784 trouble for malformed header lines. I hope it is now all correct.
786 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
787 with the "reply" argument non-NULL. The code, however (which originally
788 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
789 but it didn't always do it. This confused somebody who was copying the
790 code for some other use. I have removed all the tests.
792 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
793 feature that was used to support insecure browsers during the U.S. crypto
794 embargo. It requires special client support, and Exim is probably the
795 only MTA that supported it -- and would never use it because real RSA is
796 always available. This code has been removed, because it had the bad
797 effect of slowing Exim down by computing (never used) parameters for the
798 RSA_EXPORT functionality.
800 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
801 authenticator to fail if there's a tab character in the incoming data
802 (there should never be unless someone is messing about, as it's supposed
803 to be base64-encoded). Also added, on Timo's advice, the "secured" option
804 if the connection is using TLS or if the remote IP is the same as the
805 local IP, and the "valid-client-cert option" if a client certificate has
808 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
809 authenticators. This can be used for authorization after authentication
810 succeeds. (In the case of plaintext, it servers for both authentication
813 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
814 if any retry times were supplied.
816 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
817 connection, where there is no client IP address to check. In this
818 situation, the verify now always succeeds.
820 PH/25 Applied John Jetmore's -Mset patch.
822 PH/26 Added -bem to be like -Mset, but loading a message from a file.
824 PH/27 In a string expansion for a processed (not raw) header when multiple
825 headers of the same name were present, leading whitespace was being
826 removed from all of them, but trailing whitespace was being removed only
827 from the last one. Now trailing whitespace is removed from each header
828 before concatenation. Completely empty headers in a concatenation (as
831 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
832 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
834 PH/29 [Removed. This was a change that I later backed out, and forgot to
835 correct the ChangeLog entry (that I had efficiently created) before
836 committing the later change.]
838 PH/30 Exim was sometimes attempting to deliver messages that had suffered
839 address errors (4xx response to RCPT) over the same connection as other
840 messages routed to the same hosts. Such deliveries are always "forced",
841 so retry times are not inspected. This resulted in far too many retries
842 for the affected addresses. The effect occurred only when there were more
843 hosts than the hosts_max_try setting in the smtp transport when it had
844 the 4xx errors. Those hosts that it had tried were not added to the list
845 of hosts for which the message was waiting, so if all were tried, there
846 was no problem. Two fixes have been applied:
848 (i) If there are any address or message errors in an SMTP delivery, none
849 of the hosts (tried or untried) are now added to the list of hosts
850 for which the message is waiting, so the message should not be a
851 candidate for sending over the same connection that was used for a
852 successful delivery of some other message. This seems entirely
853 reasonable: after all the message is NOT "waiting for some host".
854 This is so "obvious" that I'm not sure why it wasn't done
855 previously. Hope I haven't missed anything, but it can't do any
856 harm, as the worst effect is to miss an optimization.
858 (ii) If, despite (i), such a delivery is accidentally attempted, the
859 routing retry time is respected, so at least it doesn't keep
860 hammering the server.
862 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
863 in ${readsocket because some servers need this prod.
865 PH/32 Added some extra debug output when updating a wait-xxx database.
867 PH/33 The hint "could be header name not terminated by colon", which has been
868 given for certain expansion errors for a long time, was not being given
869 for the ${if def:h_colon_omitted{... case.
871 PH/34 The spec says: "With one important exception, whenever a domain list is
872 being scanned, $domain contains the subject domain." There was at least
873 one case where this was not true.
875 PH/35 The error "getsockname() failed: connection reset by peer" was being
876 written to the panic log as well as the main log, but it isn't really
877 panic-worthy as it just means the connection died rather early on. I have
878 removed the panic log writing for the ECONNRESET error when getsockname()
881 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
882 runs only) independently of the message's sender address. This meant
883 that, if the 4xx error was in fact related to the sender, a different
884 message to the same recipient with a different sender could confuse
885 things. In particualar, this can happen when sending to a greylisting
886 server, but other circumstances could also provoke similar problems.
887 I have changed the default so that the retry time for these errors is now
888 based a combination of the sender and recipient addresses. This change
889 can be overridden by setting address_retry_include_sender=false in the
892 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
893 remote server are returned as part of bounce messages. This was not
894 happening for LMTP over a pipe (the lmtp transport), but now it is the
895 same for both kinds of LMTP.
897 PH/38 Despite being documented as not happening, Exim was rewriting addresses
898 in header lines that were in fact CNAMEs. This is no longer the case.
900 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
901 and queue runs started by the daemon processed all messages. This has
902 been fixed so that -R and -S can now usefully be given with -q<time>.
904 PH/40 Import PCRE release 6.7 (fixes some bugs).
906 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
908 PH/42 Give an error if -q is specified more than once.
910 PH/43 Renamed the variables $interface_address and $interface_port as
911 $received_ip_address and $received_port, to make it clear that these
912 values apply to message reception, and not to the outgoing interface when
913 a message is delivered. (The old names remain recognized, of course.)
915 PH/44 There was no timeout on the connect() call when using a Unix domain
916 socket in the ${readsocket expansion. There now is.
918 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
919 be meaningful with "accept".
921 SC/01 Eximstats V1.43
922 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
924 SC/02 Eximstats V1.44
925 Use a glob alias rather than an array ref in the generated
926 parser. This improves both readability and performance.
928 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
929 Collect SpamAssassin and rejection statistics.
930 Don't display local sender or destination tables unless
931 there is data to show.
932 Added average volumes into the top table text output.
934 SC/04 Eximstats V1.46
935 Collect data on the number of addresses (recipients)
936 as well as the number of messages.
938 SC/05 Eximstats V1.47
939 Added 'Message too big' to the list of mail rejection
940 reasons (thanks to Marco Gaiarin).
942 SC/06 Eximstats V1.48
943 Mainlog lines which have GMT offsets and are too short to
944 have a flag are now skipped.
946 SC/07 Eximstats V1.49 (Alain Williams)
947 Added the -emptyok flag.
949 SC/08 Eximstats V1.50
950 Fixes for obtaining the IP address from reject messages.
952 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
953 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
954 whitesspace changes from 4.64-PH/27
956 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
959 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
960 are found, allow negative numbers in numeric criteria)
962 JJ/06 exipick.20061117.2, added new $message_body_missing variable
964 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
965 to match changes made in 4.64-PH/43
967 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
969 PH/47 Put in an explicit test for a DNS lookup of an address record where the
970 "domain" is actually an IP address, and force a failure. This locks out
971 those revolvers/nameservers that support "A-for-A" lookups, in
972 contravention of the specifications.
974 PH/48 When a host name was looked up from an IP address, and the subsequent
975 forward lookup of the name timed out, the host name was left in
976 $sender_host_name, contrary to the specification.
978 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
979 restricted to single-key lookups, Exim was not diagnosing an error if
980 * or *@ was used with a query-style lookup.
982 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
984 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
985 long ago, but noone interested enough thought of it. Let's just say that
986 the "1.1" means that there are some new functions that weren't there at
987 some point in the past.
989 PH/51 Error processing for expansion failure of helo_data from an smtp
990 transport during callout processing was broken.
992 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
993 tested/used via the -bh/-bhc/-bs options.
995 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
996 bug, fixed in subsequent PCRE releases).
998 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
999 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1001 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1007 SC/01 Use a glob alias rather than an array ref in eximstats generated
1008 parser. This improves both readability and performance.
1010 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1011 Don't display local sender or destination tables in eximstats unless
1012 there is data to show.
1013 Added average volumes into the eximstats top table text output.
1015 SC/03 Collect data on the number of addresses (recipients) as well
1016 as the number of messages in eximstats.
1018 TF/01 Correct an error in the documentation for the redirect router. Exim
1019 does (usually) call initgroups() when daemonizing.
1021 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1022 with consistent privilege compared to when running as a daemon.
1024 TF/03 Note in the spec that $authenticated_id is not set for local
1025 submissions from trusted users.
1027 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1028 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1030 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1031 by adding some example configuration directives to the default
1032 configuration file. A little bit of work is required to uncomment the
1033 directives and define how usernames and passwords are checked, but
1034 there is now a framework to start from.
1036 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1037 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1038 without this. I don't know how relevant this is to other LDAP libraries.
1040 PH/02 Add the verb name to the "unknown ACL verb" error.
1042 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1044 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1046 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1047 directory not expanded when it should be if an expanded home directory
1048 was set for the address (which is overridden by the transport).
1050 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1053 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1054 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1055 because it is too late at that time, and has no effect.
1057 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1058 security issue with \' (bugzilla #107). I could not use the
1059 PQescapeStringConn() function, because it needs a PGconn value as one of
1062 PH/08 When testing addresses using -bt, indicate those final addresses that
1063 are duplicates that would not cause an additional delivery. At least one
1064 person was confused, thinking that -bt output corresponded to deliveries.
1065 (Suppressing duplicates isn't a good idea as you lose the information
1066 about possibly different redirections that led to the duplicates.)
1068 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1069 systems where poll() doesn't work, in particular OS X.
1071 PH/10 Added more information to debugging output for retry time not reached.
1073 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1074 operations in malware.c.
1076 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1079 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1080 syslog_duplication set false, log lines that would normally be written
1081 both the the main log and to the reject log were not written to syslog at
1084 PH/14 In the default configuration, change the use of "message" in ACL warn
1085 statements to "add_header".
1087 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1088 not followed by a command (e.g. "seen endif").
1090 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1091 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1094 PH/17 Added extra conditions to the default value of delay_warning_condition
1098 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1099 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1100 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1103 The Auto-Submitted: and various List- headers are standardised, whereas I
1104 don't think Precedence: ever was.
1106 PH/18 Refactored debugging code in route_finduser() to show more information,
1107 in particular, the error code if getpwnam() issues one.
1109 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1110 This is apparently needed in addition to the PH/07 change above to avoid
1111 any possible encoding problems.
1113 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1114 but not after initializing Perl.
1116 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1117 output them only if debugging. By default they are written stderr,
1118 apparently, which is not desirable.
1120 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1123 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1126 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1128 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1129 authenticated or an ident call has been made. Suppress the default
1130 values for $authenticated_id and $authenticated_sender (but permit -oMai
1131 and -oMas) when testing with -bh.
1133 PH/24 Re-jigged the order of the tests in the default configuration so that the
1134 tests for valid domains and recipients precede the DNS black list and CSA
1135 tests, on the grounds that those ones are more expensive.
1137 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1138 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1139 This bug exists in every version of Exim that I still have, right back to
1142 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1143 However, an attempt to turn on case-sensitivity in a regex key by
1144 including (?-i) didn't work because the subject string was already
1145 lowercased, and the effects were non-intuitive. It turns out that a
1146 one-line patch can be used to allow (?-i) to work as expected.
1152 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1153 other effects) broke the use of negated acl sub-conditions.
1155 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1158 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1159 "Deny" causes Exim to reject the incoming connection with a 554 error.
1160 Unfortunately, if there is a major crisis, such as a disk failure,
1161 tcp-wrappers gives "deny", whereas what one would like would be some
1162 kind of temporary error. A kludge has been added to help with this.
1163 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1164 554 error is used if errno is still zero or contains ENOENT (which occurs
1165 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1168 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1170 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1171 errors. Otherwise a message that provokes a temporary error (when other
1172 messages do not) can cause a whole host to time out.
1174 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1175 addresses were routed directly to files or pipes from a redirect router.
1176 File deliveries just didn't batch; pipe deliveries might have suffered
1179 PH/06 A failure to get a lock for a hints database would erroneously always say
1180 "Failed to get write lock", even when it was really a read lock.
1182 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1183 of 0600. This has been changed to use the value of the lockfile_mode
1184 option (which defaults to 0600).
1186 PH/08 Applied small patch from the Sieve maintainer.
1188 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1189 folder from quota calculations, a direct delivery into this folder messed
1190 up the contents of the maildirsize file. This was because the regex was
1191 used only to exclude .Trash (or whatever) when the size of the mailbox
1192 was calculated. There was no check that a delivery was happening into an
1193 excluded directory. This bug has been fixed by ignoring all quota
1194 processing for deliveries into excluded directories.
1196 PH/10 Added the maildirfolder_create_regex option to appendfile.
1202 PH/01 The code for finding all the local interface addresses on a FreeBSD
1203 system running IPv6 was broken. This may well have applied to all BSD
1204 systems, as well as to others that have similar system calls. The broken
1205 code found IPv4 interfaces correctly, but gave incorrect values for the
1206 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1207 that it would not match correctly against @[] and not recognize the IPv6
1210 PH/02 The ipliteral router was not recognizing addresses of the form user@
1211 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1213 PH/03 Added disable_ipv6.
1215 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1216 decoded form, because it is most often used to construct To: headers
1217 lines in autoreplies, and the decoded form may well be syntactically
1218 invalid. However, $reply_address has leading white space removed, and all
1219 newlines turned into spaces so that the autoreply transport does not
1222 PH/05 If group was specified without a user on a router, and no group or user
1223 was specified on a transport, the group from the router was ignored.
1225 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1226 for visible compile-time settings that can be used to change these
1227 numbers, for those that want even more. Backwards compatibility with old
1228 spool files has been maintained. However, going back to a previous Exim
1229 release will lost any variables that are in spool files.
1231 PH/07 Two small changes when running in the test harness: increase delay when
1232 passing a TCP/IP connection to a new process, in case the original
1233 process has to generate a bounce, and remove special handling of
1234 127.0.0.2 (sic), which is no longer necessary.
1236 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1237 be the same on different OS.
1239 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1242 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1243 whether --show-vars was specified or not
1245 JJ/02 exipick: Added support for new ACL variable spool format introduced
1248 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1249 syntactically invalid From: or Reply-to: line, and a filter used this to
1250 generate an autoreply, and therefore failed to obtain an address for the
1251 autoreply, Exim could try to deliver to a non-existent relative file
1252 name, causing unrelated and misleading errors. What now happens is that
1253 it logs this as a hard delivery error, but does not attempt to create a
1256 PH/11 The exinext utility has a -C option for testing purposes, but although
1257 the given file was scanned by exinext itself; it wasn't being passed on
1258 when Exim was called.
1260 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1261 an end-of-file indication when reading a command response.
1263 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1264 compiled. In many other places in Exim, IPv6 addresses are always
1265 recognized, so I have changed this. It also means that IPv4 domain
1266 literals of the form [IPV4:n.n.n.n] are now always recognized.
1268 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1269 used if the router is not running as root, for example, when verifying at
1270 ACL time, or when using -bh. The debugging output from this situation was
1271 non-existent - all you got was a failure to exec. I have made two
1274 (a) Failures to set uid/gid, the current directory, or a process leader
1275 in a subprocess such as that created by queryprogram now generate
1276 suitable debugging ouput when -d is set.
1278 (b) The queryprogram router detects when it is not running as root,
1279 outputs suitable debugging information if -d is set, and then runs
1280 the subprocess without attempting to change uid/gid.
1282 PH/15 Minor change to Makefile for building test_host (undocumented testing
1285 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1286 additional section of a DNS packet that returns MX or SRV records.
1287 Instead, it always explicitly searches for A/AAAA records. This avoids
1288 major problems that occur when a DNS server includes only records of one
1289 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1290 fixed another bug: if SRV records were looked up and the corresponding
1291 address records were *not* found in the additional section, the port
1292 values from the SRV records were lost.
1294 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1295 using the correct key (the original address) when searching the retry
1296 rules in order to find which one to use for generating the retry hint.
1298 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1299 adding the default one. Similarly, if it contains a Reply-To: header, the
1300 errors_reply_to option, if set, is not used.
1302 PH/19 When calculating a retry time, Exim used to measure the "time since
1303 failure" by looking at the "first failed" field in the retry record. Now
1304 it does not use this if it is later than than the arrival time of the
1305 message. Instead it uses the arrival time. This makes for better
1306 behaviour in cases where some deliveries succeed, thus re-setting the
1307 "first failed" field. An example is a quota failure for a huge message
1308 when small messages continue to be delivered. Without this change, the
1309 "time since failure" will always be short, possible causing more frequent
1310 delivery attempts for the huge message than are intended.
1311 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1313 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1314 $1, $2, $3) because the numerical variables can be reset during some
1315 expansion items (e.g. "match"), thereby losing the authentication data.
1317 PH/21 Make -bV show the size of off_t variables so that the test suite can
1318 decide whether to run tests for quotas > 2G.
1320 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1321 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1322 filecount value is greater than 2G or if a quota value is greater than 2G
1323 on a system where the size of off_t is not greater than 4, a panic error
1326 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1327 never match. The debug and -bh output now contains an explicit error
1328 message indicating a malformed IPv4 address or mask.
1330 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1331 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1332 PH/23 above applies.
1334 PH/25 Do not write to syslog when running in the test harness. The only
1335 occasion when this arises is a failure to open the main or panic logs
1336 (for which there is an explicit test).
1338 PH/26 Added the /no_tell option to "control=freeze".
1340 PH/27 If a host name lookup failed very early in a connection, for example, if
1341 the IP address matched host_lookup and the reverse lookup yielded a name
1342 that did not have a forward lookup, an error message of the form "no IP
1343 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1344 could be logged. Now it outputs the IP address instead of "NULL".
1346 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1347 allows the sender and the authenticated sender to be set when
1348 submitting a message from within Exim. Since child_open_exim() is
1349 documented for local_scan(), the new function should be too.
1351 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1352 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1353 results in an empty string is now treated as unset.
1355 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1357 PH/31 Added sender_verify_fail logging option.
1359 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1360 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1361 tidied the source and removed it altogether.
1363 PH/33 When a queue run was abandoned because the load average was too high, a
1364 log line was always written; now it is written only if the queue_run log
1365 selector is set. In addition, the log line for abandonment now contains
1366 information about the queue run such as the pid. This is always present
1367 in "start" and "stop" lines but was omitted from the "abandon" line.
1369 PH/34 Omit spaces between a header name and the colon in the error message that
1370 is given when verify = headers_syntax fails (if there are lots of them,
1371 the message gets confusing).
1373 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1374 names, as there are now some PTR records that contain slashes. This check
1375 is only to protect against broken name servers that fall over on strange
1376 characters, so the fact that it applies to all lookups doesn't matter.
1378 PH/36 Now that the new test suite is complete, we can remove some of the
1379 special code in Exim that was needed for the old test suite. For example,
1380 sorting DNS records because real resolvers return them in an arbitrary
1381 order. The new test suite's fake resolver always returns records in the
1384 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1385 bounces) except when queue_only is set, to avoid logging races between
1386 the different processes.
1388 PH/38 Panic-die if .include specifies a non-absolute path.
1390 PH/39 A tweak to the "H" retry rule from its user.
1392 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1393 a label. They prevented compilation on older perls.
1395 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1396 a warning to be raised on newish perls.
1398 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1399 on queue. Changes to match documented behaviour of showing count of
1400 messages matching specified criteria.
1402 PH/40 Changed the default ident timeout from 30s to 5s.
1404 PH/41 Added support for the use of login_cap features, on those BSD systems
1405 that have them, for controlling the resources used by pipe deliveries.
1407 PH/42 The content-scanning code uses fopen() to create files in which to put
1408 message data. Previously it was not paying any attention to the mode of
1409 the files. Exim runs with umask(0) because the rest of the code creates
1410 files with open(), and sets the required mode explicitly. Thus, these
1411 files were ending up world-writeable. This was not a big issue, because,
1412 being within the spool directory, they were not world-accessible. I have
1413 created a function called modefopen, which takes an additional mode
1414 argument. It sets umask(777), creates the file, chmods it to the required
1415 mode, then resets the umask. All the relevant calls to fopen() in the
1416 content scanning code have been changed to use this function.
1418 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1419 to 24 hours. This avoids potential overflow problems when processing G
1420 and H retry rules. I suspect nobody ever tinkers with this value.
1422 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1424 PH/45 When the plaintext authenticator is running as a client, the server's
1425 challenges are checked to ensure they are valid base64 strings. By
1426 default, the authentication attempt is cancelled if an invalid string is
1427 received. Setting client_ignore_invalid_base64 true ignores these errors.
1428 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1429 they are received. Thus, the responses can be made to depend on the
1430 challenges. If an invalid string is ignored, an empty string is placed in
1433 PH/46 Messages that are created by the autoreply transport now contains a
1434 References: header, in accordance with RFCs 2822 and 3834.
1436 PH/47 Added authenticated_sender_force to the smtp transport.
1438 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1440 PH/49 Installed latest patch from the Sieve maintainer.
1442 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1443 was also set, the appendfile transport was unnecessarily scanning a
1444 directory of message files (e.g. for maildir delivery) to find the count
1445 of files (along with the size), even though it did not need this
1446 information. It now does the scan only if it needs to find either the
1447 size of the count of files.
1449 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1451 PH/52 Two bugs concerned with error handling when the smtp transport is
1454 (i) Exim was not creating retry information for temporary errors given
1455 for individual recipients after the DATA command when the smtp transport
1456 was used in LMTP mode. This meant that they could be retried too
1457 frequently, and not timed out correctly.
1459 (ii) Exim was setting the flag that allows error details to be returned
1460 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1461 recipients that were returned after the DATA command.
1463 PH/53 This is related to PH/52, but is more general: for any failing address,
1464 when detailed error information was permitted to be returned to the
1465 sender, but the error was temporary, then after the final timeout, only
1466 "retry timeout exceeded" was returned. Now it returns the full error as
1467 well as "retry timeout exceeded".
1469 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1470 do this, and (what is worse) MTAs that accept it.
1472 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1473 will now be deprecated.
1475 PH/56 New os.c-cygwin from the Cygwin maintainer.
1477 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1478 formats (previously only available in exim formats via -bpr, -bpru,
1479 and -bpra. Now also available in native and exiqgrep formats)
1481 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1482 with very large, slow to parse queues
1484 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1486 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1488 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1489 responses to authentication challenges, though it was showing the
1490 challenges; (ii) I've removed the CR characters from the debug output for
1493 PH/58 Allow for the insertion of a newline as well as a space when a string
1494 is turned into more than one encoded-word during RFC 2047 encoding. The
1495 Sieve code now uses this.
1497 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1498 data_4xx, lost_connection, tls_required.
1500 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1501 message was being sent as an SMTP response.
1503 PH/61 Add -l and -k options to exicyclog.
1505 PH/62 When verifying, if an address was redirected to one new address, so that
1506 verification continued, and the new address failed or deferred after
1507 having set something in $address_data, the value of $address_data was not
1508 passed back to the ACL. This was different to the case when no
1509 redirection occurred. The value is now passed back in both cases.
1511 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1512 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1513 use login_cap.h, so on its own it isn't the distinguishing feature. The
1514 new name refers directly to the setclassresources() function.
1516 PH/65 Added configuration files for NetBSD3.
1518 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1520 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1521 is preferred over IPv4.
1523 PH/68 The bounce_return_message and bounce_return_body options were not being
1524 honoured for bounces generated during the reception of non-SMTP messages.
1525 In particular, this applied to messages rejected by the ACL. This bug has
1526 been fixed. However, if bounce_return_message is true and bounce_return_
1527 body is false, the headers that are returned for a non-SMTP message
1528 include only those that have been read before the error was detected.
1529 (In the case of an ACL rejection, they have all been read.)
1531 PH/69 The HTML version of the specification is now built in a directory called
1532 spec_html instead of spec.html, because the latter looks like a path with
1533 a MIME-type, and this confuses some software.
1535 PH/70 Catch two compiler warnings in sieve.c.
1537 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1538 function verify_get_ident() calls ip_connect() to connect a socket, but
1539 if the "connect()" function timed out, ip_connect() used to close the
1540 socket. However, verify_get_ident() also closes the socket later, and in
1541 between Exim writes to the log, which may get opened at this point. When
1542 the socket was closed in ip_connect(), the log could get the same file
1543 descriptor number as the socket. This naturally causes chaos. The fix is
1544 not to close the socket in ip_connect(); the socket should be closed by
1545 the function that creates it. There was only one place in the code where
1546 this was missing, in the iplookup router, which I don't think anybody now
1547 uses, but I've fixed it anyway.
1549 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1550 well as to direct DNS lookups. Otherwise the handling of names in host
1551 lists is inconsistent and therefore confusing.
1557 PH/01 Two changes to the default runtime configuration:
1559 (1) Move the checks for relay_from_hosts and authenticated clients from
1560 after to before the (commented out) DNS black list checks.
1562 (2) Add control=submission to the relay_from_hosts and authenticated
1563 clients checks, on the grounds that messages accepted by these
1564 statements are most likely to be submissions.
1566 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1568 (1) Generate an error if the third argument for the ${prvs expansion is
1571 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1574 (3) Reset the variables that are obtained from the first argument of
1575 ${prvscheck and used in the second argument before leaving the code,
1576 because their memory is reclaimed, so using them afterwards may do
1579 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1580 one (it's much easier than Tom thought :-).
1582 (5) Because of (4), we can now allow for the use of $prvscheck_result
1583 inside the third argument.
1585 PH/03 For some reason, the default setting of PATH when running a command from
1586 a pipe transport was just "/usr/bin". I have changed it to
1589 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1590 anything to be listed in the output from -bV.
1592 PH/05 When a filter generated an autoreply, the entire To: header line was
1593 quoted in the delivery log line, like this:
1595 => >A.N.Other <ano@some.domain> <original@ddress> ...
1597 This has been changed so that it extracts the operative address. There
1598 may be more than one such address. If so, they are comma-separated, like
1601 => >ano@some.domain,ona@other.domain <original@ddress> ...
1603 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1604 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1605 not being looked up in the rDNS to get a host name, Exim was showing the
1606 IP address twice in Received: lines, even though the IP addresses were
1607 identical. For example:
1609 Received: from [1.2.3.4] (helo=[1.2.3.4])
1611 However, if the real host name was known, it was omitting the HELO data
1612 if it matched the actual IP address. This has been tidied up so that it
1613 doesn't show the same IP address twice.
1615 PH/07 When both +timestamp and +memory debugging was on, the value given by
1616 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1617 called by the debug printing, thereby overwriting the timestamp buffer.
1618 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1620 PH/08 When the original message was included in an autoreply transport, it
1621 always said "this is a copy of the message, including all the headers",
1622 even if body_only or headers_only was set. It now gives an appropriate
1625 PH/09 Applied a patch from the Sieve maintainer which:
1627 o fixes some comments
1628 o adds the (disabled) notify extension core
1629 o adds some debug output for the result of if/elsif tests
1630 o points to the current vacation draft in the documentation
1631 and documents the missing references header update
1635 o fixes a bug in processing the envelope test (when testing
1636 multiple envelope elements, the last element determinted the
1639 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1640 Electronic Mail") by including:
1642 Auto-submitted: auto-generated
1644 in the messages that it generates (bounce messages and others, such as
1645 warnings). In the case of bounce messages for non-SMTP mesages, there was
1646 also a typo: it was using "Auto_submitted" (underscore instead of
1647 hyphen). Since every message generated by Exim is necessarily in response
1648 to another message, thes have all been changed to:
1650 Auto-Submitted: auto-replied
1652 in accordance with these statements in the RFC:
1654 The auto-replied keyword:
1656 - SHOULD be used on messages sent in direct response to another
1657 message by an automatic process,
1659 - MUST NOT be used on manually-generated messages,
1661 - MAY be used on Delivery Status Notifications (DSNs) and Message
1662 Disposition Notifications (MDNs),
1664 - MUST NOT be used on messages generated by automatic or periodic
1665 processes, except for messages which are automatic responses to
1668 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1669 to the default Received: header definition.
1671 PH/12 Added log selector acl_warn_skipped (default on).
1673 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1674 variables because (a) they are in the wrong storage pool and (b) even if
1675 they were copied, it wouldn't work properly because of the caching.
1677 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1678 checking when decoding. Apparently there are clients that generate
1679 overlong encoded strings. Why am I not surprised?
1681 PH/15 If the first argument of "${if match_address" was not empty, but did not
1682 contain an "@" character, Exim crashed. Now it writes a panic log message
1683 and treats the condition as false.
1685 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1687 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1688 extension "envelope-auth". The code is finished and in agreement with
1689 other implementations, but there is no documentation so far and in fact,
1690 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1691 not changing the active code.
1693 Print executed "if" and "elsif" statements when debugging is used. This
1694 helps a great deal to understand what a filter does.
1696 Document more things not specified clearly in RFC3028. I had all this
1697 sorted out, when out of a sudden new issues came to my mind. Oops."
1699 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1702 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1703 canonical form (as documented). However, after a host name lookup from
1704 the IP address, check_host() was doing a simple string comparison with
1705 addresses acquired from the DNS when checking that the found name did
1706 have the original IP as one of its addresses. Since any found IPv6
1707 addresses are likely to be in abbreviated form, the comparison could
1708 fail. Luckily, there already exists a function for doing the comparison
1709 by converting both addresses to binary, so now that is used instead of
1710 the text comparison.
1712 PH/20 There was another similar case to PH/19, when a complete host name was
1713 given in a host list; looking up its IP address could give an abbreviated
1714 form, whereas the current host's name might or might not be abbreviated.
1715 The same fix has been applied.
1721 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1722 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1725 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1726 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1728 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1730 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1731 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1732 Also, for "Auto-Submitted", treat anything other than "no" as
1733 non-personal, in accordance with RFC 3834. (Previously it treated
1734 anything starting "auto-" as non-personal.)
1736 TF/01 The control=submission/name=... option had a problem with syntax
1737 errors if the name included a slash character. The /name= option
1738 now slurps the rest of the string, so it can include any characters
1739 but it must come last in the list of options (after /sender_retain
1742 PH/05 Some modifications to the interface to the fake nameserver for the new
1750 TK/01 Added the "success_on_redirect" address verification option. See
1751 NewStuff for rationale and an example.
1753 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1755 PH/02 Patch to exigrep to allow it to work on syslog lines.
1757 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1758 fread() to skip over the body file's header line, because in Cygwin the
1759 header line is locked and is inaccessible.
1761 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1762 co-exist for some time) to make it clear that it is the Exim ID that is
1763 referenced, not the Message-ID: header line.
1765 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1766 string_format() function, because snprintf() does not exist on all
1769 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1770 ${stat: expansion item.
1772 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1773 protocol synchronization error", to keep the pedants happy.
1775 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1776 well as for IRIX systems, when gcc is being used. See the host.c source
1779 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1781 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1784 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1785 transport and to the smtp transport in LMTP mode.
1787 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1789 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1790 run a filter in a subprocess. This could lead to confusion in subsequent
1791 lookups in the parent process. There should also be a search_tidyup() at
1792 the end of the subprocess.
1794 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1795 only if the host matched helo_try_verify_hosts, which caused the
1796 verification to occur when the EHLO/HELO command was issued. The ACL just
1797 tested the remembered result. Now, if a previous verification attempt has
1798 not happened, "verify = helo" does it there and then.
1800 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1802 TK/03 Fix log output including CR from clamd.
1804 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1805 exist provoked a memory error which could cause a segfault.
1807 PH/15 Installed PCRE 6.2
1809 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1811 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1812 of the problem. Specifically, suggested +O2 rather than +O1 for the
1815 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1817 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1818 record, the port was not correctly logged when the outgoing_port log
1819 selector was set (it logged the transort's default port).
1821 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1822 fallback_hosts, and "hosts" in the smtp transport.
1824 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1825 host errors such as "Connection refused".
1827 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1828 authentication with radiusclient 0.4.9:
1830 - Error returned from rc_read_config was caught wrongly
1831 - Username/password not passed on to radius server due to wrong length.
1833 The presumption is that some radiusclient API changes for 4.51/PH/17
1834 were not taken care of correctly. The code is still untested by me (my
1835 Linux distribution still has 0.3.2 of radiusclient), but it was
1836 contributed by a Radius user.
1838 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1839 expanding the "port" option of the smtp transport.
1841 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1842 while reading a MIME header. Thanks to Tom Hughes for a patch.
1844 PH/24 Include config.h inside local_scan.h so that configuration settings are
1847 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1848 that in an ACL for RCPT (for example), you can examine exactly what was
1851 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1852 commands, but it was not correctly comparing the address with the actual
1853 client host address. Thus, it would show the EHLO address in Received:
1854 header lines when this was not necessary.
1856 PH/27 Added the % operator to ${eval:}.
1858 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1859 it should be ignoring failures (because with -C, for example, it has lost
1860 privilege). It wasn't ignoring creation failures other than "already
1863 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1866 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1867 because an input line was too long, either on its own, or by virtue of
1868 too many continuations, the temporary file was not being removed, and the
1869 return code was incorrect.
1871 PH/31 Missing "BOOL" in function definition in filtertest.c.
1873 PH/32 Applied Sieve patches from the maintainer.
1875 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1877 PH/33 Added "verify = not_blind".
1879 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1880 Local/Makefile (with some defaults set). These are used in built scripts
1881 such as exicyclog, but they have never been used in the exim_install
1882 script (though there are many overriding facilities there). I have
1883 arranged that the exim_install script now takes note of these two
1886 PH/35 Installed configuration files for Dragonfly.
1888 PH/36 When a locally submitted message by a trusted user did not contain a
1889 From: header, and the sender address was obtained from -f or from an SMTP
1890 MAIL command, and the trusted user did not use -F to supply a sender
1891 name, $originator_name was incorrectly used when constructing a From:
1892 header. Furthermore, $originator_name was used for submission mode
1893 messages from external hosts without From: headers in a similar way,
1894 which is clearly wrong.
1896 PH/37 Added control=suppress_local_fixups.
1898 PH/38 When log_selector = +received_sender was set, and the addition of the
1899 sender made the log line's construction buffer exactly full, or one byte
1900 less than full, an overflow happened when the terminating "\n" was
1903 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1904 when the result of a list match is failure because a DNS lookup failed.
1906 PH/40 RM_COMMAND is now used in the building process.
1908 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1909 the "build-* directories that it finds.
1911 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1912 address in a domain literal was a prefix of an interface address.
1914 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1915 when verifying a sender address, unless rewrite_headers is false.
1917 PH/44 Wrote a long comment about why errors_to addresses are verified as
1918 recipients, not senders.
1920 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1921 the ratelimit ACL was added.
1923 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1925 PH/46 Added extra information about PostgreSQL errors to the error string.
1927 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1928 avoiding the need to install special zones in a real server. This is
1929 backwards compatible; if it can't find the fake resolver, it drops back.
1930 Thus, both old and new test suites can be run.
1932 TF/02 Added util/ratelimit.pl
1934 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1935 clock is set back in time.
1937 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1938 Candler <B.Candler@pobox.com>.
1940 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1941 OK for addresses that are the result of redirections.
1943 PH/48 A number of further additions for the benefit of the new test suite,
1944 including a fake gethostbyname() that interfaces to the fake DNS resolver
1947 TF/06 The fix for widen_domains has also been applied to qualify_single and
1948 search_parents which are the other dnslookup options that can cause
1951 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1954 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1956 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1957 service" if it encountered an MX record with an empty target hostname.
1958 The message is now "an MX or SRV record indicated no SMTP service".
1960 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1961 if the DNS of the sending site is misconfigured. This is quite a
1962 common situation. This change restores the behaviour of treating a
1963 helo verification defer as a failure.
1965 PH/51 If self=fail was set on a router, the bounce message did not include the
1966 actual error message.
1972 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1974 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1975 command itself ended in error, the underlying message about the transport
1976 filter timeout was being overwritten with the pipe command error. Now the
1977 underlying error message should be appended to the second error message.
1979 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1981 PH/02 Reduce the amount of output that "make" produces by default. Full output
1982 can still be requested.
1984 PH/03 The warning log line about a condition test deferring for a "warn" verb
1985 was being output only once per connection, rather than after each
1986 occurrence (because it was using the same function as for successful
1987 "warn" verbs). This seems wrong, so I have changed it.
1989 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1990 it should not have, which might have caused a crash in the right
1991 circumstances, but probably never did.
1993 PH/04 Installed a modified version of Tony Finch's patch to make submission
1994 mode fix the return path as well as the Sender: header line, and to
1995 add a /name= option so that you can make the user's friendly name appear
1998 TF/03 Added the control = fakedefer ACL modifier.
2000 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2001 Mark Lowes for thorough testing.
2003 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2005 TK/03 Merged latest SRS patch from Miles Wilton.
2007 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2008 with the definition in sysexits.h (which is #included earlier).
2009 Fortunately, Exim does not actually use EX_OK. The code used to try to
2010 preserve the sysexits.h value, by assumimg that macro definitions were
2011 scanned for macro replacements. I have been disabused of this notion,
2012 so now the code just undefines EX_OK before #including unistd.h.
2014 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2015 in the smtp transport. When a block could not be written in a single
2016 write() function, the timeout was being re-applied to each part-write.
2017 This seems wrong - if the receiver was accepting one byte at a time it
2018 would take for ever. The timeout is now adjusted when this happens. It
2019 doesn't have to be particularly precise.
2021 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2022 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2024 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2025 without a domain if the check to <postmaster@domain> fails.
2027 SC/01 Eximstats: added -xls and the ability to specify output files
2028 (patch written by Frank Heydlauf).
2030 SC/02 Eximstats: use FileHandles for outputing results.
2032 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2034 SC/04 Eximstats: fixed display of large numbers with -nvr option
2036 SC/05 Eximstats: fixed merging of reports with empty tables.
2038 SC/06 Eximstats: added the -include_original_destination flag
2040 SC/07 Eximstats: removed tabs and trailing whitespace.
2042 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2044 TK/06 MBOX spool code: Add real "From " MBOX separator line
2045 so the .eml file is really in mbox format (even though
2046 most programs do not really care). Patch from Alex Miller.
2048 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2049 The latter is generated from $received_to and is only set if the
2050 message has one envelope recipient. SA can use these headers,
2051 obviously out-of-the-box. Patch from Alex Miller.
2053 PH/08 The ${def test on a variable was returning false if the variable's
2054 value was "0", contrary to what the specification has always said!
2055 The result should be true unless the variable is empty.
2057 PH/09 The syntax error of a character other than { following "${if
2058 def:variable_name" (after optional whitespace) was not being diagnosed.
2059 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2060 accidental colon was present, for example, could give incorrect results.
2062 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2063 result is used (not including appendfile, where other changes are about
2066 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2067 This involved changing a lot of size variables from int to off_t. It
2068 should work with maildirs and everything.
2070 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2071 spamd dying while we are connected to it.
2073 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2076 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2077 function for BDB 4.3.
2079 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2081 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2082 the sources for PCRE have been re-arranged and more files are now
2085 PH/15 The code I had for printing potentially long long variables in PH/11
2086 above was not the best (it lost precision). The length of off_t variables
2087 is now inspected at build time, and an appropriate printing format (%ld
2088 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2089 to be "long long int" or "long int". This is needed for the internal
2090 formatting function string_vformat().
2092 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2093 the configuration file to be ":syslog", then the script "guesses" where
2094 the logs files are, rather than using the compiled in default. In our
2095 case the guess is not the same as the compiled default, so the script
2096 suddenly stopped working when I started to use syslog. The patch checks
2097 to see if log_file_path is "". If so, it attempts to read it from exim
2098 with no configuration file to get the compiled in version, before it
2099 falls back to the previous guessing code."
2101 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2102 implementing BATV in an Exim configuration. See NewStuff for the gory
2105 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2106 Makefile that are specific to HP-UX.
2108 PH/18 If the "use_postmaster" option was set for a recipient callout together
2109 with the "random" option, the postmaster address was used as the MAIL
2110 FROM address for the random test, but not for the subsequent recipient
2111 test. It is now used for both.
2113 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2114 patch removes a few documentation additions to RFC 3028, because the
2115 latest draft now contains them. It adds the new en;ascii-case comparator
2116 and a new error check for 8bit text in MIME parts. Comparator and
2117 require names are now matched exactly. I enabled the subaddress
2118 extension, but it is not well tested yet (read: it works for me)."
2120 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2121 rework some of the code of TK/09 above to avoid the hardwired use of
2122 "%lld" and "long long". Replaced the call to snprintf() with a call to
2125 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2126 records point to non-existent hosts", "retry timeout exceeded", and
2127 "retry time not reached for any host after a long failure period".
2129 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2130 experimental DomainKeys support:
2132 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2133 (2) On an error such as an illegally used "control", the wrong name for
2134 the control was given.
2136 These problems did NOT occur unless DomainKeys support was compiled.
2138 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2140 PH/24 Added ${if match_ip condition.
2142 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2143 databases so that it will be absolutely obvious if a crash occurs in the
2144 DB library. This is a regular occurrence (often caused by mis-matched
2147 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2148 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2149 picked up on a user's system that detects such things. There doesn't seem
2150 to be a gcc warning option for this - only an attribute that has to be
2151 put on the function's prototype. It seems that in Fedora Core 4 they have
2152 set this on a number of new functions. No doubt there will be more in due
2155 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2156 specify a transport. However, if an address that was verified by such a
2157 router was the subject of a callout, Exim crashed because it tried to
2158 read the rcpt_include_affixes from the non-existent transport. Now it
2159 just assumes that the setting of that option is false. This bug was
2160 introduced by 4.51/PH/31.
2162 PH/28 Changed -d+all to exclude +memory, because that information is very
2163 rarely of interest, but it makes the output a lot bigger. People tend to
2164 do -d+all out of habit.
2166 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2167 code in os-type was giving problems when libc.so lives in lib64, like on
2170 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2171 aren't the modern standard, and it seems that some systems' include files
2172 don't always have them. Exim was already checking for some of the newer
2173 ones like T_AAAA, and defining it itself. I've added checks for all the
2174 record types that Exim uses.
2176 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2177 not automatically generating a new one, as it is supposed to. This
2178 prevented TLS from working. If the file did exist, but contained invalid
2179 data, a new version was generated, as expected. It was only the case of a
2180 non-existent file that was broken.
2182 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2183 with a change in libdomainkeys > 0.64.
2185 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2186 from DNS. If the selector record carries the flag, it now has
2187 precedence over the domain-wide flag.
2189 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2191 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2192 the use of a port name that isn't defined in /etc/services) occurred, the
2193 message was deferred as in a normal delivery, and thus remained on the
2194 spool, instead of being failed because of the mua_wrapper setting. This
2195 is now fixed, and I tidied up some of the mua_wrapper messages at the
2198 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2199 the messages in a hash of arrays rather than using individual hashes.
2200 This is a bit cleaner and results in dramatic memory savings, albeit
2201 at a slight CPU cost.
2203 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2204 as requested by Marc Sherman.
2206 SC/10 Eximstats: added histograms for user specified patterns as requested
2209 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2211 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2212 fopen() in the content-scanning modules that did not already have it.
2218 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2219 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2221 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2223 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2225 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2226 to test Sieve filters that use "vacation".
2228 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2229 that changes the way the GnuTLS parameters are stored in the cache file.
2230 The new format can be generated externally. For backward compatibility,
2231 if the data in the cache doesn't make sense, Exim assumes it has read an
2232 old-format file, and it generates new data and writes a new file. This
2233 means that you can't go back to an older release without removing the
2236 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2237 work if there are any delivery delays because "one_time" forces the
2238 parent to be marked "delivered", so its unseen clone is never tried
2239 again. For this reason, Exim now forbids the simultaneous setting of
2242 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2243 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2244 entry if you want to know the details. The fix, however, neglected to
2245 consider the case when local delivery batching is involved. The test for
2246 "previously delivered" was not happening when checking to see if an
2247 address could be batched with a previous (undelivered) one; under
2248 certain circumstances this could lead to multiple deliveries to the same
2251 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2252 in its include files, and this causes problems building Exim.
2254 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2255 header_syntax) but Exim was just ignoring anything given after a slash.
2256 In particular, this caused confusion with an attempt to use "verify =
2257 reverse_host_lookup/defer_ok". An error is now given when options are
2258 supplied for verify items that do not have them. (Maybe reverse_host_
2259 lookup should have a defer_ok option, but that's a different point.)
2261 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2262 defined by RFC 821) to 2048, because there were problems with some AUTH
2263 commands, and RFC 1869 says the size should be increased for extended
2264 SMTP commands that take arguments.
2266 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2269 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2270 "unknown" error; now it says that the functionality isn't in the binary.
2272 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2273 an address' error message when a string expansion fails (syntax or
2274 whatever). Otherwise the password may appear in the log. Following change
2275 PH/42 below, there is no longer a chance of it appearing in a bounce
2278 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2280 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2281 of its addresses was ever tried. (Bugzilla bug #2.)
2283 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2284 the result incorrectly in the debug output. (It correctly added a newline
2285 to what was transported.)
2287 TF/01 Added $received_time.
2289 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2290 commented out examples of how to interface to a virus scanner and to
2291 SpamAssassin. Also added commented examples of av_scanner and
2292 spamd_address settings.
2294 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2295 and controls are allowed in which ACLs. There were a couple of minor
2296 errors. Some of the entries in the conditions table (which is a table of
2297 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2298 negation of where the condition IS allowed.
2300 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2302 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2303 header file does not have a version number, so I've had to invent a new
2304 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2305 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2306 radiusclient), but it was contributed by a Radius user.
2308 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2309 files or directories, for OpenSSL.
2311 PH/19 When an Exim process that is running as root has to create an Exim log
2312 file, it does so in a subprocess that runs as exim:exim so as to get the
2313 ownership right at creation (otherwise, other Exim processes might see
2314 the file with the wrong ownership). There was no test for failure of this
2315 fork() call, which would lead to the process getting stuck as it waited
2316 for a non-existent subprocess. Forks do occasionally fail when resources
2317 run out. I reviewed all the other calls to fork(); they all seem to check
2320 PH/20 When checking for unexpected SMTP input at connect time (before writing
2321 the banner), Exim was not dealing correctly with a non-positive return
2322 from the read() function. If the client had disconnected by this time,
2323 the result was a log entry for a synchronization error with an empty
2324 string after "input=" when read() returned zero. If read() returned -1
2325 (an event I could not check), uninitialized data bytes were printed.
2326 There were reports of junk text (parts of files, etc) appearing after
2329 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2331 PH/22 Added support for macro redefinition, and (re)definition in between
2332 driver and ACL definitions.
2334 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2335 forgetting to use the resulting value; it was using the unexpanded value.
2337 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2338 hadn't been configured. The fix is from Juergen Kreileder, who
2339 understands it better than I do:
2341 "Here's what I see happening with three configured cyrus_sasl
2342 authenticators configured (plain, login, cram-md5):
2344 On startup auth_cyrus_sasl_init() gets called for each of these.
2345 This means three calls to sasl_listmech() without a specified mech_list.
2346 => SASL tests which mechs of all available mechs actually work
2347 => three warnings about OTP not working
2348 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2350 With the patch, sasl_listmech() also gets called three times. But now
2351 SASL's mech_list option is set to the server_mech specified in the the
2352 authenticator. Or in other words, the answer from sasl_listmech()
2353 gets limited to just the mech you're testing for (which is different
2355 => the return list contains just 'plain' or 'login', 'cram-md5' or
2356 nothing depending on the value of ob->server_mech.
2358 I've just tested the patch: Authentication still works fine,
2359 unavailable mechs specified in the exim configuration are still
2360 caught, and the auth.log warnings about OTP are gone."
2362 PH/25 When debugging is enabled, the contents of the command line are added
2363 to the debugging output, even when log_selector=+arguments is not
2366 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2367 answer is "GNU", and only if the return is "GNU/something" is the answer
2370 PH/27 $acl_verify_message is now set immediately after the failure of a
2371 verification in an ACL, and so is available in subsequent modifiers. In
2372 particular, the message can be preserved by coding like this:
2374 warn !verify = sender
2375 set acl_m0 = $acl_verify_message
2377 Previously, $acl_verify_message was set only while expanding "message"
2378 and "log_message" when a very denied access.
2380 PH/28 Modified OS/os.c-Linux with
2382 -#ifndef OS_LOAD_AVERAGE
2383 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2385 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2386 nomenclature these days.)
2388 PH/29 Installed patch from the Sieve maintainer that adds the options
2389 sieve_useraddress and sieve_subaddress to the redirect router.
2391 PH/30 In these circumstances:
2392 . Two addresses routed to the same list of hosts;
2393 . First host does not offer TLS;
2394 . First host accepts first address;
2395 . First host gives temporary error to second address;
2396 . Second host offers TLS and a TLS session is established;
2397 . Second host accepts second address.
2398 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2399 and peerdn, if requested) that were in fact used only for the second
2402 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2403 attention to any local part prefix or suffix that was matched by the
2404 router that accepted the address. It now behaves in the same way as it
2405 does for delivery: the affixes are removed from the local part unless
2406 rcpt_include_affixes is set on the transport.
2408 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2409 timeout during the DATA phase of an incoming message.
2411 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2412 applied a patch sanctioned by the Sieve maintainer.
2414 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2415 the uid or gid is negative. A case of a negative gid caused this to be
2416 noticed. The fix allows for either to be negative.
2418 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2419 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2422 PH/36 The change PH/12 above was broken. Fixed it.
2424 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2425 the grounds that routing the same address twice would always produce the
2426 same answer. This might have been true once, but it is certainly no
2427 longer true now. Routing a child address may depend on the previous
2428 routing that produced that child. Some complicated redirection strategies
2429 went wrong when messages had multiple recipients, and made Exim's
2430 behaviour dependent on the order in which the addresses were given.
2432 I have moved the duplicate checking until after the routing is complete.
2433 Exim scans the addresses that are assigned to local and remote
2434 transports, and removes any duplicates. This means that more work will be
2435 done, as duplicates will always all be routed, but duplicates are
2436 presumably rare, so I don't expect this is of any significance.
2438 For deliveries to pipes, files, and autoreplies, the duplicate checking
2439 still happens during the routing process, since they are not going to be
2442 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2443 It corrects a timeout issue with spamd. This is Ian's comment: "The
2444 background is that sometimes spamd either never reads data from a
2445 connection it has accepted, or it never writes response data. The exiscan
2446 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2447 blindly assumes that writes won't block so it may never time out."
2449 PH/39 Allow G after quota size as well as K and M.
2451 PH/40 The value set for $authenticated_id in an authenticator may not contain
2452 binary zeroes or newlines because the value is written to log lines and
2453 to spool files. There was no check on this. Now the value is run through
2454 the string_printing() function so that such characters are converted to
2455 printable escape sequences.
2457 PH/41 $message_linecount is a new variable that contains the total number of
2458 lines in the message. Compare $body_linecount, which is the count for the
2461 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2462 bounce and delay warning messages, except in certain special cases, which
2465 (a) An SMTP error message from a remote host;
2466 (b) A message specified in a :fail: redirection;
2467 (c) A message specified in a "fail" command in a system filter;
2468 (d) A message specified in a FAIL return from the queryprogram router;
2469 (e) A message specified by the cannot_route_message router option.
2471 In these cases only, Exim does include the error details in bounce and
2472 warning messages. There are also a few cases where bland messages such
2473 as "unrouteable address" or "local delivery error" are given.
2475 PH/43 $value is now also set for the "else" part of a ${run expansion.
2477 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2478 being worked on, but at least Exim now implements the latest version to
2481 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2482 process to complete was treated as a delivery failure, a timeout while
2483 writing the message to the pipe was logged, but erroneously treated as a
2484 successful delivery. Such timeouts include transport filter timeouts. For
2485 consistency with the overall process timeout, these timeouts are now
2486 treated as errors, giving rise to delivery failures by default. However,
2487 there is now a new Boolean option for the pipe transport called
2488 timeout_defer, which, if set TRUE, converts the failures into defers for
2489 both kinds of timeout. A transport filter timeout is now identified in
2492 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2493 systems where "make" and "gmake" are different, calling "gmake" at top
2494 level broke things. I've arranged for the value of $(MAKE) to be passed
2495 from the Makefile to this script so that it can call the same version of
2499 A note about Exim versions 4.44 and 4.50
2500 ----------------------------------------
2502 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2503 changes of various kinds. As a consequence, a big documentation update was
2504 needed. This delayed the release for rather longer than seemed good, especially
2505 in the light of a couple of (minor) security issues. Therefore, the changes
2506 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2507 release. So 4.44 and 4.50 are in effect two different branches that both start
2510 I have left the 4.50 change log unchanged; it contains all the changes since
2511 4.43. The change log for 4.44 is below; many of its items are identical to
2512 those for 4.50. This seems to be the most sensible way to preserve the
2513 historical information.
2519 1. Minor wording change to the doc/README.SIEVE file.
2521 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2522 computation of the current number of files was incorrect.
2524 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2525 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2528 4. Give more explanation in the error message when the command for a transport
2529 filter fails to execute.
2531 5. There are several places where Exim runs a non-Exim command in a
2532 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2533 was being done only for the command run by the queryprogram router. It is
2534 now done for all such subprocesses. The other cases are: ${run, transport
2535 filters, and the commands run by the lmtp and pipe transports.
2537 6. Added CONFIGURE_GROUP build-time option.
2539 7. Some older OS have a limit of 256 on the maximum number of file
2540 descriptors. Exim was using setrlimit() to set 1000 as a large value
2541 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2542 systems. I've change it so that if it can't get 1000, it tries for 256.
2544 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2545 was an oversight, and furthermore, ever since the addition of extra
2546 controls (e.g. 4.43/32), the checks on when to allow different forms of
2547 "control" were broken. There should now be diagnostics for all cases when a
2548 control that does not make sense is encountered.
2550 9. Added the /retain_sender option to "control=submission".
2552 10. $recipients is now available in the predata ACL (oversight).
2554 11. Tidy the search cache before the fork to do a delivery from a message
2555 received from the command line. Otherwise the child will trigger a lookup
2556 failure and thereby defer the delivery if it tries to use (for example) a
2557 cached ldap connection that the parent has called unbind on.
2559 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2560 of $address_data from the recipient verification was clobbered by the
2561 sender verification.
2563 13. The value of address_data from a sender verification is now available in
2564 $sender_address_data in subsequent conditions in the ACL statement.
2566 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2568 15. Added a new option "connect=<time>" to callout options, to set a different
2571 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2572 was its contents. (It was OK if the option was not defined at all.)
2574 17. A "Completed" log line is now written for messages that are removed from
2575 the spool by the -Mrm option.
2577 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2578 information about exactly what failed.
2580 19. Added -dd to debug only the daemon process.
2582 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2583 handles timeouts, both on the server side and network timeouts. Renamed the
2584 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2586 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2587 It is now set to "smtps".
2589 22. $host_address is now set to the target address during the checking of
2590 ignore_target_hosts.
2592 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2593 being passed; this would have caused $sender_host_name to have been used if
2594 matching the list had actually called for a host name (not very likely,
2595 since this list is usually IP addresses). A host name is now passed as
2598 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2599 code that specifies a non-restarting handler (typically sigaction() in
2600 modern systems) in an attempt to fix a rare and obscure crash bug.
2602 25. Narrowed the window for a race in the daemon that could cause it to ignore
2603 SIGCHLD signals. This is not a major problem, because they are used only to
2604 wake it up if nothing else does.
2606 26. A malformed maildirsize file could cause Exim to calculate negative values
2607 for the mailbox size or file count. Odd effects could occur as a result.
2608 The maildirsize information is now recalculated if the size or filecount
2611 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2612 support for a long time. Removed HAVE_SYS_VFS_H.
2614 28. Installed the latest version of exipick from John Jetmore.
2616 29. In an address list, if the pattern was not a regular expression, an empty
2617 subject address (from a bounce message) matched only if the pattern was an
2618 empty string. Non-empty patterns were not even tested. This was the wrong
2619 because it is perfectly reasonable to use an empty address as part of a
2620 database query. An empty address is now tested by patterns that are
2621 lookups. However, all the other forms of pattern expect the subject to
2622 contain a local part and a domain, and therefore, for them, an empty
2623 address still always fails if the pattern is not itself empty.
2625 30. Exim went into a mad DNS loop when attempting to do a callout where the
2626 host was specified on an smtp transport, and looking it up yielded more
2627 than one IP address.
2629 31. Re-factored the code for checking spool and log partition space into a
2630 function that finds that data and another that does the check. The former
2631 is then used to implement four new variables: $spool_space, $log_space,
2632 $spool_inodes, and $log_inodes.
2634 32. The RFC2047 encoding function was originally intended for short strings
2635 such as real names; it was not keeping to the 75-character limit for
2636 encoded words that the RFC imposes. It now respects the limit, and
2637 generates multiple encoded words if necessary. To be on the safe side, I
2638 have increased the buffer size for the ${rfc2047: expansion operator from
2641 33. It is now permitted to omit both strings after an "if" condition; if the
2642 condition is true, the result is "true". As before, when the second string
2643 is omitted, a false condition yields an empty string. This makes it less
2644 cumbersome to write custom ACL and router conditions.
2646 34. Failure to deliver a bounce message always caused it to be frozen, even if
2647 there was an errors_to setting on the router. The errors_to setting is now
2650 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2651 canonical form (fully expanded) before being placed in
2652 $sender_host_address.
2654 36. The table in the code that translates DNS record types into text (T_A to
2655 "A" for instance) was missing entries for NS and CNAME. It is just possible
2656 that this could have caused confusion if both these types were looked up
2657 for the same domain, because the text type is used as part of Exim's
2658 per-process caching. But the chance of anyone hitting this buglet seems
2661 37. The dnsdb lookup has been extended in a number of ways.
2663 (1) There is a new type, "zns", which walks up the domain tree until it
2664 finds some nameserver records. It should be used with care.
2666 (2) There is a new type, "mxh", which is like "mx" except that it returns
2667 just the host names, not the priorities.
2669 (3) It is now possible to give a list of domains (or IP addresses) to be
2670 looked up. The behaviour when one of the lookups defers can be
2671 controlled by a keyword.
2673 (4) It is now possible to specify the separator character for use when
2674 multiple records are returned.
2676 38. The dnslists ACL condition has been extended: it is now possible to supply
2677 a list of IP addresses and/or domains to be looked up in a particular DNS
2680 39. Added log_selector=+queue_time_overall.
2682 40. When running the queue in the test harness, wait just a tad after forking a
2683 delivery process, to get repeatability of debugging output.
2685 41. Include certificate and key file names in error message when GnuTLS fails
2686 to set them up, because the GnuTLS error message doesn't include the name
2687 of the failing file when there is a problem reading it.
2689 42. Allow both -bf and -bF in the same test run.
2691 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2693 44. The "Exiscan patch" is now merged into the mainline Exim source.
2695 45. Sometimes the final signoff response after QUIT could fail to get
2696 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2697 < 0 before doing a fflush(). This bug looks as though it goes back to the
2698 introduction of TLS in release 3.20, but "sometimes" must have been rare
2699 because the tests only now provoked it.
2701 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2702 (this can affect the format of dates).
2704 47. exim_tidydb, when checking for the continued existence of a message for
2705 which it has found a message-specific retry record, was not finding
2706 messages that were in split spool directories. Consequently, it was
2707 deleting retry records that should have stayed in existence.
2709 48. Steve fixed some bugs in eximstats.
2711 49. The SPA authentication driver was not abandoning authentication and moving
2712 on to the next authenticator when an expansion was forced to fail,
2713 contradicting the general specification for all authenticators. Instead it
2714 was generating a temporary error. It now behaves as specified.
2716 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2717 (the order specifies the preference for clients). The order is now AES256,
2718 AES128, 3DES, ARCFOUR128.
2720 51. Small patch to Sieve code - explicitly set From: when generating an
2723 52. Exim crashed if a remote delivery caused a very long error message to be
2724 recorded - for instance if somebody sent an entire SpamAssassin report back
2725 as a large number of 550 error lines. This bug was coincidentally fixed by
2726 increasing the size of one of Exim's internal buffers (big_buffer) that
2727 happened as part of the Exiscan merge. However, to be on the safe side, I
2728 have made the code more robust (and fixed the comments that describe what
2731 53. Now that there can be additional text after "Completed" in log lines (if
2732 the queue_time_overall log selector is set), a one-byte patch to exigrep
2733 was needed to allow it to recognize "Completed" as not the last thing in
2736 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2737 patch that reportedly fixes this has been added. I am not expert enough to
2738 create a test for it. This is what the patch creator wrote:
2740 "I found a little strange behaviour of ldap code when working with
2741 Windows 2003 AD Domain, where users was placed in more than one
2742 Organization Units. When I tried to give exim partial DN, the exit code
2743 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2744 But simultaneously result of request was absolutely normal ldap result,
2745 so I produce this patch..."
2747 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2748 REFERENCE, so I have modified the code to exclude the patch when that macro
2751 55. Some experimental protocols are using DNS PTR records for new purposes. The
2752 keys for these records are domain names, not reversed IP addresses. The
2753 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2754 leaves it alone. Component reversal etc. now happens only for IP addresses.
2757 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2759 57. Double the size of the debug message buffer (to 2048) so that more of very
2760 long debug lines gets shown.
2762 58. The exicyclog utility now does better if the number of log files to keep
2763 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2765 59. Two changes related to the smtp_active_hostname option:
2767 (1) $smtp_active_hostname is now available as a variable.
2768 (2) The default for smtp_banner uses $smtp_active_hostname instead
2769 of $primary_hostname.
2771 60. The host_aton() function is supposed to be passed a string that is known
2772 to be a valid IP address. However, in the case of IPv6 addresses, it was
2773 not checking this. This is a hostage to fortune. Exim now panics and dies
2774 if the condition is not met. A case was found where this could be provoked
2775 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2776 components; fortuitously, this particular loophole had already been fixed
2777 by change 4.50/55 above.
2779 If there are any other similar loopholes, the new check in host_aton()
2780 itself should stop them being exploited. The report I received stated that
2781 data on the command line could provoke the exploit when Exim was running as
2782 exim, but did not say which command line option was involved. All I could
2783 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2784 running as the user.
2787 61. There was a buffer overflow vulnerability in the SPA authentication code
2788 (which came originally from the Samba project). I have added a test to the
2789 spa_base64_to_bits() function which I hope fixes it.
2792 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2793 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2795 63. The daemon start-up calls getloadavg() while still root for those OS that
2796 need the first call to be done as root, but it missed one case: when
2797 deliver_queue_load_max is set with deliver_drop_privilege. This is
2798 necessary for the benefit of the queue runner, because there is no re-exec
2799 when deliver_drop_privilege is set.
2801 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2802 This has been fixed.
2804 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2805 was in use, was not putting the data itself into the right store pool;
2806 consequently, it could be overwritten for a subsequent message in the same
2807 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2810 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2812 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2813 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2814 the function were treating the return as a boolean value, which happened to
2815 work because 0=false and not-0=true, but is not correct code.
2817 68. The host_aton() function was not handling scoped IPv6 addresses (those
2818 with, for example, "%eth0" on the end) correctly.
2820 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2821 negated items (that is, ~something) in unsigned ints. Some compilers
2822 apparently mutter when there is no cast.
2824 70. If an address verification called from an ACL failed, and did not produce a
2825 user-specific message (i.e. there was only a "system" message), nothing was
2826 put in $acl_verify_message. In this situation, it now puts the system
2829 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2830 session; change 4.31/43 added the unwanted input to the log line - except
2831 that it did not do this in the start of session case. It now does.
2833 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2834 This is wrong and can cause the other end to generate a synchronization
2835 error if it is another Exim or anything else that does the synchronization
2836 check. A QUIT command is no longer sent after a timeout.
2838 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2839 during host lookups.
2841 74. The defer_ok option of callout verification was not working if it was used
2842 when verifying addresses in header lines, that is, for this case:
2844 verify = header_sender/callout=defer_ok
2846 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2847 those file descriptors could be used for SMTP connections. If anything
2848 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2849 could be sent to the SMTP client, causing chaos. The daemon now opens
2850 stdin, stdout, and stderr to /dev/null when it puts itself into the
2853 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2854 log by default. The user can override this with suitable Perl magic.
2856 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2857 the log message when discard triggers, was not working for the DATA ACL or
2858 for the non-SMTP ACL.
2860 78. Error message wording change in sieve.c.
2862 79. If smtp_accept_max_per_host was set, the number of connections could be
2863 restricted to fewer than expected, because the daemon was trying to set up
2864 a new connection before checking whether the processes handling previous
2865 connections had finished. The check for completed processes is now done
2866 earlier. On busy systems, this bug wouldn't be noticed because something
2867 else would have woken the daemon, and it would have reaped the completed
2870 80. If a message was submitted locally by a user whose login name contained one
2871 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2872 It caused a spool format error. I have fixed the spool reading code. A
2873 related problem was that the "from" clause in the Received: line became
2874 illegal because of the space(s). It is now covered by ${quote_local_part.
2876 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2879 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2881 83. Patch from Sieve maintainer to fix unterminated string problem in
2882 "vacation" handling.
2884 84. Some minor changes to the Linux configuration files to help with other
2885 OS variants using glibc.
2887 85. One more patch for Sieve to update vacation handling to latest spec.
2890 ----------------------------------------------------
2891 See the note above about the 4.44 and 4.50 releases.
2892 ----------------------------------------------------
2898 1. Change 4.43/35 introduced a bug that caused file counts to be
2899 incorrectly computed when quota_filecount was set in an appendfile
2902 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2903 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2906 3. Give more explanation in the error message when the command for a transport
2907 filter fails to execute.
2909 4. There are several places where Exim runs a non-Exim command in a
2910 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2911 was being done only for the command run by the queryprogram router. It is
2912 now done for all such subprocesses. The other cases are: ${run, transport
2913 filters, and the commands run by the lmtp and pipe transports.
2915 5. Some older OS have a limit of 256 on the maximum number of file
2916 descriptors. Exim was using setrlimit() to set 1000 as a large value
2917 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2918 systems. I've change it so that if it can't get 1000, it tries for 256.
2920 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2921 was an oversight, and furthermore, ever since the addition of extra
2922 controls (e.g. 4.43/32), the checks on when to allow different forms of
2923 "control" were broken. There should now be diagnostics for all cases when a
2924 control that does not make sense is encountered.
2926 7. $recipients is now available in the predata ACL (oversight).
2928 8. Tidy the search cache before the fork to do a delivery from a message
2929 received from the command line. Otherwise the child will trigger a lookup
2930 failure and thereby defer the delivery if it tries to use (for example) a
2931 cached ldap connection that the parent has called unbind on.
2933 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2934 of $address_data from the recipient verification was clobbered by the
2935 sender verification.
2937 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2938 was its contents. (It was OK if the option was not defined at all.)
2940 11. A "Completed" log line is now written for messages that are removed from
2941 the spool by the -Mrm option.
2943 12. $host_address is now set to the target address during the checking of
2944 ignore_target_hosts.
2946 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2947 being passed; this would have caused $sender_host_name to have been used if
2948 matching the list had actually called for a host name (not very likely,
2949 since this list is usually IP addresses). A host name is now passed as
2952 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2953 code that specifies a non-restarting handler (typically sigaction() in
2954 modern systems) in an attempt to fix a rare and obscure crash bug.
2956 15. Narrowed the window for a race in the daemon that could cause it to ignore
2957 SIGCHLD signals. This is not a major problem, because they are used only to
2958 wake it up if nothing else does.
2960 16. A malformed maildirsize file could cause Exim to calculate negative values
2961 for the mailbox size or file count. Odd effects could occur as a result.
2962 The maildirsize information is now recalculated if the size or filecount
2965 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2966 support for a long time. Removed HAVE_SYS_VFS_H.
2968 18. Updated exipick to current release from John Jetmore.
2970 19. Allow an empty sender to be matched against a lookup in an address list.
2971 Previously the only cases considered were a regular expression, or an
2974 20. Exim went into a mad DNS lookup loop when doing a callout where the
2975 host was specified on the transport, if the DNS lookup yielded more than
2978 21. The RFC2047 encoding function was originally intended for short strings
2979 such as real names; it was not keeping to the 75-character limit for
2980 encoded words that the RFC imposes. It now respects the limit, and
2981 generates multiple encoded words if necessary. To be on the safe side, I
2982 have increased the buffer size for the ${rfc2047: expansion operator from
2985 22. Failure to deliver a bounce message always caused it to be frozen, even if
2986 there was an errors_to setting on the router. The errors_to setting is now
2989 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2990 canonical form (fully expanded) before being placed in
2991 $sender_host_address.
2993 24. Updated eximstats to version 1.33
2995 25. Include certificate and key file names in error message when GnuTLS fails
2996 to set them up, because the GnuTLS error message doesn't include the name
2997 of the failing file when there is a problem reading it.
2999 26. Expand error message when OpenSSL has problems setting up cert/key files.
3002 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3003 (this can affect the format of dates).
3005 28. exim_tidydb, when checking for the continued existence of a message for
3006 which it has found a message-specific retry record, was not finding
3007 messages that were in split spool directories. Consequently, it was
3008 deleting retry records that should have stayed in existence.
3010 29. eximstats updated to version 1.35
3011 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3012 1.35 - bugfix such that pie charts by volume are generated correctly
3014 30. The SPA authentication driver was not abandoning authentication and moving
3015 on to the next authenticator when an expansion was forced to fail,
3016 contradicting the general specification for all authenticators. Instead it
3017 was generating a temporary error. It now behaves as specified.
3019 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3020 (the order specifies the preference for clients). The order is now AES256,
3021 AES128, 3DES, ARCFOUR128.
3023 31. Small patch to Sieve code - explicitly set From: when generating an
3026 32. Exim crashed if a remote delivery caused a very long error message to be
3027 recorded - for instance if somebody sent an entire SpamAssassin report back
3028 as a large number of 550 error lines. This bug was coincidentally fixed by
3029 increasing the size of one of Exim's internal buffers (big_buffer) that
3030 happened as part of the Exiscan merge. However, to be on the safe side, I
3031 have made the code more robust (and fixed the comments that describe what
3034 33. Some experimental protocols are using DNS PTR records for new purposes. The
3035 keys for these records are domain names, not reversed IP addresses. The
3036 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3037 leaves it alone. Component reversal etc. now happens only for IP addresses.
3040 34. The host_aton() function is supposed to be passed a string that is known
3041 to be a valid IP address. However, in the case of IPv6 addresses, it was
3042 not checking this. This is a hostage to fortune. Exim now panics and dies
3043 if the condition is not met. A case was found where this could be provoked
3044 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3045 components; fortuitously, this particular loophole had already been fixed
3046 by change 4.50/55 or 4.44/33 above.
3048 If there are any other similar loopholes, the new check in host_aton()
3049 itself should stop them being exploited. The report I received stated that
3050 data on the command line could provoke the exploit when Exim was running as
3051 exim, but did not say which command line option was involved. All I could
3052 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3053 running as the user.
3056 35. There was a buffer overflow vulnerability in the SPA authentication code
3057 (which came originally from the Samba project). I have added a test to the
3058 spa_base64_to_bits() function which I hope fixes it.
3061 36. The daemon start-up calls getloadavg() while still root for those OS that
3062 need the first call to be done as root, but it missed one case: when
3063 deliver_queue_load_max is set with deliver_drop_privilege. This is
3064 necessary for the benefit of the queue runner, because there is no re-exec
3065 when deliver_drop_privilege is set.
3067 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3068 was in use, was not putting the data itself into the right store pool;
3069 consequently, it could be overwritten for a subsequent message in the same
3070 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3073 38. Sometimes the final signoff response after QUIT could fail to get
3074 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3075 < 0 before doing a fflush(). This bug looks as though it goes back to the
3076 introduction of TLS in release 3.20, but "sometimes" must have been rare
3077 because the tests only now provoked it.
3083 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3084 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3085 Now it returns an integer. A number of calls were still expecting a T/F
3086 return. Fortuitously, in all cases, the tests worked in OK situations,
3087 which is the norm. However, things would have gone wrong on any write
3088 failures on the smtp file descriptor. This function is used when sending
3089 messages over SMTP and also when doing verify callouts.
3091 2. When Exim is called to do synchronous delivery of a locally submitted
3092 message (the -odf or -odi options), it no longer closes stderr before doing
3095 3. Implemented the mua_wrapper option.
3097 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3099 5. Implemented the functions header_remove(), header_testname(),
3100 header_add_at_position(), and receive_remove_recipient(), and exported them
3103 6. If an ACL "warn" statement specified the addition of headers, Exim already
3104 inserted X-ACL-Warn: at the start if there was no header name. However, it
3105 was not making this test for the second and subsequent header lines if
3106 there were newlines in the string. This meant that an invalid header could
3107 be inserted if Exim was badly configured.
3109 7. Allow an ACL "warn" statement to add header lines at the start or after all
3110 the Received: headers, as well as at the end.
3112 8. Added the rcpt_4xx retry error code.
3114 9. Added postmaster_mailfrom=xxx to callout verification option.
3116 10. Added mailfrom=xxxx to the callout verification option, for verify=
3119 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3120 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3122 12. Inserted some casts to stop certain compilers warning when using pointer
3123 differences as field lengths or precisions in printf-type calls (mostly
3124 affecting debugging statements).
3126 13. Added optional readline() support for -be (dynamically loaded).
3128 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3129 same clock tick as a message's arrival, so that its received time was the
3130 same as the "first fail" time on the retry record, and that message
3131 remained on the queue past the ultimate address timeout, every queue runner
3132 would try a delivery (because it was past the ultimate address timeout) but
3133 after another failure, the ultimate address timeout, which should have then
3134 bounced the address, did not kick in. This was a "< instead of <=" error;
3135 in most cases the first failure would have been in the next clock tick
3136 after the received time, and all would be well.
3138 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3139 being recognized when the domain list was tested by the match_domain
3140 condition in an expansion string.
3142 16. Added the ${str2b64: operator.
3144 17. Exim was always calling setrlimit() to set a large limit for the number of
3145 processes, without checking whether the existing limit was already
3146 adequate. (It did check for the limit on file descriptors.) Furthermore,
3147 errors from getrlimit() and setrlimit() were being ignored. Now they are
3148 logged to the main and panic logs, but Exim does carry on, to try to do its
3149 job under whatever limits there are.
3151 18. Imported PCRE 5.0.
3153 19. Trivial typo in log message " temporarily refused connection" (the leading
3156 20. If the log selector return_path_on_delivery was set and an address was
3157 redirected to /dev/null, the delivery process crashed because it assumed
3158 that a return path would always be set for a "successful" delivery. In this
3159 case, the whole delivery is bypassed as an optimization, and therefore no
3162 21. Internal re-arrangement: the function for sending a challenge and reading
3163 a response while authentication was assuming a zero-terminated challenge
3164 string. It's now changed to take a pointer and a length, to allow for
3165 binary data in such strings.
3167 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3169 23. Exim was not respecting finduser_retries when seeking the login of the
3170 uid under which it was called; it was always trying 10 times. (The default
3171 setting of finduser_retries is zero.) Also, it was sleeping after the final
3172 failure, which is pointless.
3174 24. Implemented tls_on_connect_ports.
3176 25. Implemented acl_smtp_predata.
3178 26. If the domain in control=submission is set empty, Exim assumes that the
3179 authenticated id is a complete email address when it generates From: or
3180 Sender: header lines.
3182 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3183 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3184 chown and chgrp in /bin and hostname in /usr/bin.
3186 28. Exim was keeping the "process log" file open after each use, just as it
3187 does for the main log. This opens the possibility of it remaining open for
3188 long periods when the USR1 signal hits a daemon. Occasional processlog
3189 errors were reported, that could have been caused by this. Anyway, it seems
3190 much more sensible not to leave this file open at all, so that is what now
3193 29. The long-running daemon process does not normally write to the log once it
3194 has entered its main loop, and it closes the log before doing so. This is
3195 so that log files can straightforwardly be renamed and moved. However,
3196 there are a couple of unusual error situations where the daemon does write
3197 log entries, and I had neglected to close the log afterwards.
3199 30. The text of an SMTP error response that was received during a remote
3200 delivery was being truncated at 512 bytes. This is too short for some of
3201 the long messages that one sometimes sees. I've increased the limit to
3204 31. It is now possible to make retry rules that apply only when a message has a
3205 specific sender, in particular, an empty sender.
3207 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3208 it possible to be selective about when SMTP synchronization is enforced.
3210 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3212 32. Implemented hosts_connection_nolog.
3214 33. Added an ACL for QUIT.
3216 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3219 35. Added mailbox_size and mailbox_filecount to appendfile.
3221 36. Added control = no_multiline_responses to ACLs.
3223 37. There was a bug in the logic of the code that waits for the clock to tick
3224 in the case where the clock went backwards by a substantial amount such
3225 that the microsecond fraction of "now" was more than the microsecond
3226 fraction of "then" (but the whole seconds number was less).
3228 38. Added support for the libradius Radius client library this is found on
3229 FreeBSD (previously only the radiusclient library was supported).
3235 1. When certain lookups returned multiple values in the form name=value, the
3236 quoting of the values was not always being done properly. Specifically:
3237 (a) If the value started with a double quote, but contained no whitespace,
3239 (b) If the value contained whitespace other than a space character (i.e.
3240 tabs or newlines or carriage returns) it was not quoted.
3241 This fix has been applied to the mysql and pgsql lookups by writing a
3242 separate quoting function and calling it from the lookup code. The fix
3243 should probably also be applied to nisplus, ibase and oracle lookups, but
3244 since I cannot test any of those, I have not disturbed their existing code.
3246 2. A hit in the callout cache for a specific address caused a log line with no
3247 reason for rejecting RCPT. Now it says "Previous (cached) callout
3248 verification failure".
3250 3. There was an off-by-one bug in the queryprogram router. An over-long
3251 return line was truncated at 256 instead of 255 characters, thereby
3252 overflowing its buffer with the terminating zero. As well as fixing this, I
3253 have increased the buffer size to 1024 (and made a note to document this).
3255 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3256 when Exim is waiting for an SMTP response from a remote server, Exim
3257 restarts its select() call on the socket, thereby resetting its timeout.
3258 This is not a problem when such interrupts are rare. Somebody set up a cron
3259 job to run exiwhat every 2 minutes, which is less than the normal select()
3260 timeout (5 or 10 minutes). This meant that the select() timeout never
3261 kicked in because it was always reset. I have fixed this by comparing the
3262 time when an interrupt arrives with the time at the start of the first call
3263 to select(). If more time than the timeout has elapsed, the interrupt is
3264 treated as a timeout.
3266 5. Some internal re-factoring in preparation for the addition of Sieve
3267 extensions (by MH). In particular, the "personal" test is moved to a
3268 separate function, and given an option for scanning Cc: and Bcc: (which is
3269 not set for Exim filters).
3271 6. When Exim created an email address using the login of the caller as the
3272 local part (e.g. when creating a From: or Sender: header line), it was not
3273 quoting the local part when it contained special characters such as @.
3275 7. Installed new OpenBSD configuration files.
3277 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3278 try to make them clearer.
3280 9. Callout options, other than the timeout value, were being ignored when
3281 verifying sender addresses in header lines. For example, when using
3283 verify = header_sender/callout=no_cache
3285 the cache was (incorrectly) being used.
3287 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3288 only the Cygwin environment.
3290 11. When return_path_on_delivery was set as a log selector, if different remote
3291 addresses in the same message used different return paths and parallel
3292 remote delivery occurred, the wrong values would sometimes be logged.
3293 (Whenever a remote delivery process finished, the return path value from
3294 the most recently started remote delivery process was logged.)
3296 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3297 lines when AUTH and/or TLS are in use. This is the "received protocol"
3298 field. Exim used to use "asmtp" for authenticated SMTP, without any
3299 indication (in the protocol name) for TLS use. Now it follows the RFC and
3300 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3301 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3302 names appear in log lines as well as in Received: header lines.
3304 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3305 extensions, and comparison tests, and to fix some bugs.
3307 14. Changes to the "personal" filter test:
3309 (1) The test was buggy in that it was just doing the equivalent of
3310 "contains" tests on header lines. For example, if a user's address was
3311 anne@some.where, the "personal" test would incorrectly be true for
3313 To: susanne@some.where
3315 This test is now done by extracting each address from the header in turn,
3316 and checking the entire address. Other tests that are part of "personal"
3317 are now done using regular expressions (for example, to check local parts
3318 of addresses in From: header lines).
3320 (2) The list of non-personal local parts in From: addresses has been
3321 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3322 taken from the Sieve specification recommendations.
3324 (3) If the message contains any header line starting with "List-" it is
3325 treated as non-personal.
3327 (4) The test for "circular" in the Subject: header line has been removed
3328 because it now seems ill-conceived.
3330 15. Minor typos in src/EDITME comments corrected.
3332 16. Installed latest exipick from John Jetmore.
3334 17. If headers_add on a router specified a text string that was too long for
3335 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3336 of string_sprintf() is now avoided.
3338 18. $message_body_size was not set (it was always zero) when running the DATA
3339 ACL and the local_scan() function.
3341 19. For the "mail" command in an Exim filter, no default was being set for
3342 the once_repeat time, causing a random time value to be used if "once" was
3343 specified. (If the value happened to be <= 0, no repeat happened.) The
3344 default is now 0s, meaning "never repeat". The "vacation" command was OK
3345 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3346 (I found it when inspecting the code).
3348 20. There is now an overall timeout for performing a callout verification. It
3349 defaults to 4 times the callout timeout, which applies to individual SMTP
3350 commands during the callout. The overall timeout applies when there is more
3351 than one host that can be tried. The timeout is checked before trying the
3352 next host. This prevents very long delays if there are a large number of
3353 hosts and all are timing out (e.g. when the network connections are timing
3354 out). The value of the overall timeout can be changed by specifying an
3355 additional sub-option for "callout", called "maxwait". For example:
3357 verify = sender/callout=5s,maxwait=20s
3359 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3360 to the end before writing, but this should make it even safer).
3362 22. Exim was forgetting that it had advertised PIPELINING for the second and
3363 subsequent messages on an SMTP connection. It was also not resetting its
3364 memory on STARTTLS and an internal HELO.
3366 23. When Exim logs an SMTP synchronization error within a session, it now
3367 records whether PIPELINING has been advertised or not.
3369 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3370 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3371 rather than long int.
3373 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3375 26. Added the never_mail option to autoreply.
3381 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3382 crash if the getsockname() call failed; this can happen if a connection is
3383 closed very soon after it is established. The problem was simply in the
3384 order in which certain operations were done, causing Exim to try to write
3385 to the SMTP stream before it had set up the file descriptor. The bug has
3386 been fixed by making things happen in the correct order.
3392 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3393 before the connection was closed, thus losing the rejection response.
3395 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3396 some early Solaris releases, but causes trouble in current releases where
3397 socklen_t is defined.
3399 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3402 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3405 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3406 that releasing the top of it at the end releases what was used for sub-
3407 expansions (unless the block got too big). However, discard this block if
3408 the first thing is a variable or header, so that we can use its block when
3409 it is dynamic (useful for very large $message_headers, for example).
3411 6. Lookups now cache *every* query, not just the most recent. A new, separate
3412 store pool is used for this. It can be recovered when all lookup caches are
3413 flushed. Lookups now release memory at the end of their result strings.
3414 This has involved some general refactoring of the lookup sources.
3416 7. Some code has been added to the store_xxx() functions to reduce the amount
3417 of flapping under certain conditions.
3419 8. log_incoming_interface used to affect only the <= reception log lines. Now
3420 it causes the local interface and port to be added to several more SMTP log
3421 lines, for example "SMTP connection from", and rejection lines.
3423 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3425 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3427 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3428 could be overwritten at the end of the current message (or the start of a
3429 new message if it was set in a HELO ACL). The value is now preserved for
3430 the duration of the SMTP connection.
3432 12. If a transport had a headers_rewrite setting, and a matching header line
3433 contained an unqualified address, that address was qualified, even if it
3434 did not match any rewriting rules. The underlying bug was that the values
3435 of the flags that permit the existence of unqualified sender and recipient
3436 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3437 non-local messages, and by -bnq for local messages) were not being
3438 preserved with the message after it was received.
3440 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3441 "next input=" as part of the text comprising the host identity instead of
3442 the correct text. The code was using the same buffer for two different
3443 strings. However, depending on which order the printing function evaluated
3444 its arguments, the bug did not always show up. Under Linux, for example, my
3445 test suite worked just fine.
3447 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3448 doesn't work with some older versions of Perl. It has been changed to "my",
3449 which in any case is probably the better facility to use.
3451 15. A really picky compiler found some instances of statements for creating
3452 error messages that either had too many or two few arguments for the format
3455 16. The size of the buffer for calls to the DNS resolver has been increased
3456 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3457 for addresses that have a lot of PTR records. This alleviates a problem; it
3458 does not fully solve it.
3460 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3461 buffer now truncates the list and logs the incident, which is the same
3462 action as happens when Exim is looking up a host name and its aliases.
3463 Previously in this situation something unpredictable would happen;
3464 sometimes it was "internal error: store_reset failed".
3466 18. If a server dropped the connection unexpectedly when an Exim client was
3467 using GnuTLS and trying to read a response, the client delivery process
3468 crashed while trying to generate an error log message.
3470 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3471 string, for example:
3473 warn message = H1: something\nH2: something
3475 the text was added as a single header line from Exim's point of view
3476 though it ended up OK in the delivered message. However, searching for the
3477 second and subsequent header lines using $h_h2: did not work. This has been
3478 fixed. Similarly, if a system filter added multiple headers in this way,
3479 the routers could not see them.
3481 20. Expanded the error message when iplsearch is called with an invalid key to
3482 suggest using net-iplsearch in a host list.
3484 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3485 ACLs are no longer actually imposed (and a message to that effect is
3488 22. If a "gecos" field in a passwd entry contained escaped characters, in
3489 particular, if it contained a \" sequence, Exim got it wrong when building
3490 a From: or a Sender: header from that name. A second bug also caused
3491 incorrect handling when an unquoted " was present following a character
3492 that needed quoting.
3494 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3495 was not being matched caselessly.
3497 24. Arranged for all hyphens in the exim.8 source to be escaped with
3500 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3501 properly. Recipient callout cache records were still being keyed to include
3502 the sender, even when use_sender was set false. This led to far more
3503 callouts that were necessary. The sender is no longer included in the key
3504 when use_sender is false.
3506 26. Added "control = submission" modifier to ACLs.
3508 27. Added the ${base62d: operator to decode base 62 numbers.
3510 28. dnsdb lookups can now access SRV records.
3512 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3513 the configuration file.
3515 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3516 (-v) mode. This makes the output for a verbose queue run more intelligible.
3518 31. Added a use_postmaster feature to recipient callouts.
3520 32. Added the $body_zerocount variable, containing the number of binary zero
3521 bytes in the message body.
3523 33. The time of last modification of the "new" subdirectory is now used as the
3524 "mailbox time last read" when there is a quota error for a maildir
3527 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3529 35. Added +ignore_unknown as a special item in host lists.
3531 36. Code for decoding IPv6 addresses in host lists is now included, even if
3532 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3533 address was recognized as an IP address, but was then not correctly decoded
3534 into binary, causing unexpected and incorrect effects when compared with
3541 1. Very minor rewording of debugging text in manualroute to say "list of
3542 hosts" instead of "hostlist".
3544 2. If verify=header_syntax was set, and a header line with an unqualified
3545 address (no domain) and a large number of spaces between the end of the
3546 name and the colon was received, the reception process suffered a buffer
3547 overflow, and (when I tested it) crashed. This was caused by some obsolete
3548 code that should have been removed. The fix is to remove it!
3550 3. When running in the test harness, delay a bit after writing a bounce
3551 message to get a bit more predictability in the log output.
3553 4. Added a call to search_tidyup() just before forking a reception process. In
3554 theory, someone could use a lookup in the expansion of smtp_accept_max_
3555 per_host which, without the tidyup, could leave open a database connection.
3557 5. Added the variables $recipient_data and $sender_data which get set from a
3558 lookup success in an ACL "recipients" or "senders" condition, or a router
3559 "senders" option, similar to $domain_data and $local_part_data.
3561 6. Moved the writing of debug_print from before to after the "senders" test
3564 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3565 problems for message scanning, either using a data ACL, or using
3566 local_scan() because the Received: header was not generated till after they
3567 were called (in order to set the time as the time of reception completion).
3568 I have revised the way this works. The header is now generated after the
3569 body is received, but before the ACL or local_scan() are called. After they
3570 are run, the timestamp in the header is updated.
3576 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3577 before starting a queue runner without re-exec. This happened only when
3578 deliver_drop_privilege was set or when the Exim user was set to root. The
3579 effect of the bug was that timeouts during subsequent deliveries caused
3580 crashes instead of being properly handled. The handler is now left at its
3581 default (and expected) setting.
3583 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3584 message, again when deliver_drop_privilege is set or Exim is run as root.
3585 The bug described in (1) was not present in this case, but the tidying up
3586 of the other signals was missing. I have made the two cases consistent.
3588 3. The ignore_target_hosts setting on a manualroute router was being ignored
3589 for hosts that were looked up using the /MX notation.
3591 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3594 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3595 operated on the sender address. After changing the $sender_address to <>
3596 for the sender address verify, Exim was re-instated it as the original
3597 (before rewriting) address, but remembering that it had rewritten it, so it
3598 wasn't rewriting it again. This bug also had the effect of breaking the
3599 sender address verification caching when the sender address was rewritten.
3601 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3602 This has been changed so that if the ip literal address matches
3603 ignore_target_hosts, the router declines.
3605 7. Added expansion conditions match_domain, match_address, and match_local_
3606 part (NOT match_host).
3608 8. The placeholder for the Received: header didn't have a length field set.
3610 9. Added code to Exim itself and to exim_lock to test for a specific race
3611 condition that could lead to file corruption when using MBX delivery. The
3612 issue is with the lockfile that is created in /tmp. If this file is removed
3613 after a process has opened it but before that process has acquired a lock,
3614 there is the potential for a second process to recreate the file and also
3615 acquire a lock. This could lead to two Exim processes writing to the file
3616 at the same time. The added code performs the same test as UW imapd; it
3617 checks after acquiring the lock that its file descriptor still refers to
3618 the same named file.
3620 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3621 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3624 11. Added the smtp_active_hostname option. If used, this will typically be made
3625 to depend on the incoming interface address. Because $interface_address is
3626 not set up until the daemon has forked a reception process, error responses
3627 that can happen earlier (such as "too many connections") no longer contain
3630 12. If an expansion in a condition on a "warn" statement fails because a lookup
3631 defers, the "warn" statement is abandoned, and the next ACL statement is
3632 processed. Previously this caused the whole ACL to be aborted.
3634 13. Added the iplsearch lookup type.
3636 14. Added ident_timeout as a log selector.
3638 15. Added tls_certificate_verified as a log selector.
3640 16. Added a global option tls_require_ciphers (compare the smtp transport
3641 option of the same name). This controls incoming TLS connections.
3643 17. I finally figured out how to make tls_require_ciphers do a similar thing
3644 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3645 before starting the TLS session.
3647 18. Tabs are now shown as \t in -bP output.
3649 19. If the log selector return_path_on_delivery was set, Exim crashed when
3650 bouncing a message because it had too many Received: header lines.
3652 20. If two routers both had headers_remove settings, and the first one included
3653 a superfluous trailing colon, the final name in the first list and the
3654 first name in the second list were incorrectly joined into one item (with a
3655 colon in the middle).
3661 1. Added -C and -D options to the exinext utility, mainly to make it easier
3662 to include in the automated testing, but these could be helpful when
3663 multiple configurations are in use.
3665 2. The exinext utility was not formatting the output nicely when there was
3666 an alternate port involved in the retry record key, nor when there was a
3667 message id as well (for retries that were specific to a specific message
3668 and a specific host). It was also confused by IPv6 addresses, because of
3669 the additional colons they contain. I have fixed the IPv4 problem, and
3670 patched it up to do a reasonable job for IPv6.
3672 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3673 delivery, the log line now contains "pipelined" if PIPELINING was used.
3675 4. An SMTP transport process used to panic and die if the bind() call to set
3676 an explicit outgoing interface failed. This has been changed; it is now
3677 treated in the same way as a connect() failure.
3679 5. A reference to $sender_host_name in the part of a conditional expansion
3680 that was being skipped was still causing a DNS lookup. This no longer
3683 6. The def: expansion condition was not recognizing references to header lines
3684 that used bh_ and bheader_.
3686 7. Added the _cache feature to named lists.
3688 8. The code for checking quota_filecount in the appendfile transport was
3689 allowing one more file than it should have been.
3691 9. For compatibility with Sendmail, the command line option
3699 and sets the incoming protocol and host name (for trusted callers). The
3700 host name and its colon can be omitted when only the protocol is to be set.
3701 Note the Exim already has two private options, -pd and -ps, that refer to
3702 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3703 "s", but I don't think that's a major issue.
3705 10. A number of refactoring changes to the code, none of which should affect
3708 (a) The number of logging options was getting close to filling up the
3709 32-bit word that was used as a bit map. I have split them into two classes:
3710 those that are passed in the argument to log_write(), and those that are
3711 only ever tested independently outside of that function. These are now in
3712 separate 32-bit words, so there is plenty of room for expansion again.
3713 There is no change in the user interface or the logging behaviour.
3715 (b) When building, for example, log lines, the code previously used a
3716 macro that called string_cat() twice, in order to add two strings. This is
3717 not really sufficiently general. Furthermore, there was one instance where
3718 it was actually wrong because one of the argument was used twice, and in
3719 one call a function was used. (As it happened, calling the function twice
3720 did not affect the overall behaviour.) The macro has been replaced by a
3721 function that can join an arbitrary number of extra strings onto a growing
3724 (c) The code for expansion conditions now uses a table and a binary chop
3725 instead of a serial search (which was left over from when there were very
3726 few conditions). Also, it now recognizes conditions like "pam" even when
3727 the relevant support is not compiled in: a suitably worded error message is
3728 given if an attempt is made to use such a condition.
3730 11. Added ${time_interval:xxxxx}.
3732 12. A bug was causing one of the ddress fields not to be passed back correctly
3733 from remote delivery subprocesses. The field in question was not being
3734 subsequently used, so this caused to problems in practice.
3736 13. Added new log selectors queue_time and deliver_time.
3738 14. Might have fixed a bug in maildirsizefile handling that threw up
3739 "unexpected character" debug warnings, and recalculated the data
3740 unnecessarily. In any case, I expanded the warning message to give more
3743 15. Added the message "Restricted characters in address" to the statements in
3744 the default ACL that block characters like @ and % in local parts.
3746 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3747 Three changes have been made:
3749 (a) There was a serious bug; a negative response to MAIL caused the whole
3750 recipient domain to be cached as invalid, thereby blocking all messages
3751 to all local parts at the same domain, from all senders. This bug has
3752 been fixed. The domain is no longer cached after a negative response to
3753 MAIL if the sender used is not empty.
3755 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3758 (c) A new callout option, "use_sender" has been added for people who want
3759 the modified behaviour.
3765 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3768 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3769 indeed breaks things for older releases.
3771 3. Added additional logging to the case where there is a problem reading data
3772 from a filter that is running in a subprocess using a pipe, in order to
3773 try to track down a specific problem.
3775 4. Testing facility fudge: when running in the test harness and attempting
3776 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3777 getting "No route to host". Convert this to a timeout.
3779 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3782 6. Some OS don't have socklen_t but use size_t instead. This affects the
3783 fifth argument of getsockopt() amongst other things. This is now
3784 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3785 can be set for individual OS. I have set it for SunOS5, OSF1, and
3786 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3787 some earlier ones do not.
3789 7. Change 4.30/15 was not doing the test caselessly.
3791 8. The standard form for an IPv6 address literal was being rejected by address
3792 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3793 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3794 this, as well as the form without the "IPv6" on the front (but only when
3795 address literals are enabled, of course).
3797 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3799 10. Exim crashed if a message with an empty sender address specified by -f
3800 encountered a router with an errors_to setting. This could be provoked only
3801 by a command such as
3805 where an empty string was supplied; "<>" did not hit this bug.
3807 11. Installed PCRE release 4.5.
3809 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3810 remained set. It is now erased.
3812 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3813 times from message ids (which are base 36 rather than the normal 62).
3815 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3816 were being counted as actual protocol errors, and logged if the log
3817 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3818 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3819 and DATA following a set of rejected RCPTs do not count as protocol errors.
3820 In other words, Exim assumes they were pipelined, though this may not
3821 actually be the case. Of course, in all cases the client gets an
3822 appropriate error code.
3824 15. If a lookup fails in an ACL condition, a message about the failure may
3825 be available; it is used if testing the ACL cannot continue, because most
3826 such messages specify what the cause of the deferral is. However, some
3827 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3828 that caused an old message to be retained and used if a later statement
3829 caused a defer, replacing the real cause of the deferral.
3831 16. If an IP address had so many PTR records that the DNS lookup buffer
3832 was not large enough to hold them, Exim could crash while trying to process
3833 the truncated data. It now detects and logs this case.
3835 17. Further to 4.21/58, another change has been made: if (and only if) the
3836 first line of a message (the first header line) ends with CRLF, a bare LF
3837 in a subsequent header line has a space inserted after it, so as not to
3838 terminate the header.
3840 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3841 unnecessarily, used atoi() instead of strtol(), and didn't check the
3842 termination when getting file sizes from file names by regex.
3844 19. Completely re-implemented the support for maildirsize files, in the light
3845 of a number of problems with the previous contributed implementation
3846 (4.30/29). In particular:
3848 . If the quota is zero, the maildirsize file is maintained, but no quota is
3851 . If the maildir directory does not exist, it is created before any attempt
3852 to write a maildirsize file.
3854 . The quota value in the file is just a cache; if the quota is changed in
3855 the transport, the new value overrides.
3857 . A regular expression is available for excluding directories from the
3860 20. The autoreply transport checks the characters in options that define the
3861 message's headers; it allows continued headers, but it was checking with
3862 isspace() after an embedded newline instead of explicitly looking for a
3865 21. If all the "regular" hosts to which an address was routed had passed their
3866 expiry times, and had not reached their retry times, the address was
3867 bounced, even if fallback hosts were defined. Now Exim should go on to try
3870 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3871 equivalent code in the SMTP transport. Some hosts send humungous responses
3872 to HELO/EHLO, more than 1024 it seems.
3874 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3875 gives compiler warnings in some environments. I've now done it "properly",
3878 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3879 (because of problems with the built-in one) was declared to return uschar *
3880 instead of char *, causing compiler failure.
3882 25. Fixed a file descriptor leak when processing alias/forward files.
3884 26. Fixed a minor format string issue in dbfn.c.
3886 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3888 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3889 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3892 29. When a sender address is verified, it is cached, to save repeating the test
3893 when there is more than one recipient in a message. However, when the
3894 verification involves a callout, it is possible for different callout
3895 options to be set for different recipients. It is too complicated to keep
3896 track of this in the cache, so now Exim always runs a verification when a
3897 callout is required, relying on the callout cache for the optimization.
3898 The overhead is duplication of the address routing, but this should not be
3901 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3902 to be verified with callout=postmaster, and the main callout worked but the
3903 postmaster check failed, the verification correctly failed. However, if a
3904 subsequent RCPT command asked for sender verification *without* the
3905 postmaster check, incorrect caching caused this verification also to fail,
3908 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3909 it was not caching the DNS options (qualify_single, search_parents) that
3910 were used when the lookup failed. A subsequent lookup with different
3911 options therefore always gave the same answer, though there were cases
3912 where it should not have. (Example: a "domains = !$mx_any" option on a
3913 dnslookup router: the "domains" option is always processed without any
3914 widening, but the router might have qualify_single set.) Now Exim uses the
3915 cached value only when the same options are set.
3917 32. Added John Jetmore's "exipick" utility to the distribution.
3919 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3920 than a timeout (e.g. a certificate is required, and is not provided), an
3921 Exim server now closes the connection immediately. Previously it waited for
3922 the client to close - but if the client is SSL, it seems that they each
3923 wait for each other, leading to a delay before one of them times out.
3925 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3926 maintained 0.8.x compatibility because I don't think many are using it, and
3927 it is clearly obsolete.
3929 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3932 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3933 client certificate was expired. A simple patch fixes this, though I don't
3934 understand the full logic of why the verify callback is called multiple
3937 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3938 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3939 which causes problems with some clients (such as the Certicom SSL Plus
3940 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3941 disables the coutermeasure allowing Eudora to connect."
3943 38. Exim was not checking that a write() to a log file succeeded. This could
3944 lead to Bad Things if a log got too big, in particular if it hit a file
3945 size limit. Exim now panics and dies if it cannot write to a log file, just
3946 as it does if it cannot open a log file.
3948 39. Modified OS/Makefile-Linux so that it now contains
3950 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3952 The two -D definitions ensure that Exim is compiled with large file
3953 support, which makes it possible to handle log files that are bigger than
3956 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3957 instance) a domain was checked against a named list that involved a lookup,
3958 causing $domain_data to be set, then another domain was checked against the
3959 same list, then the first domain was re-checked, the value of $domain_data
3960 after the final check could be wrong. In particular, if the second check
3961 failed, it could be set empty. This bug probably also applied to
3964 41. The strip_trailing_dot option was not being applied to the address given
3965 with the -f command-line option.
3967 42. The code for reading a message's header from the spool was incrementing
3968 $received_count, but never initializing it. This meant that the value was
3969 incorrect (doubled) while delivering a message in the same process in which
3970 it was received. In the most common configuration of Exim, this never
3971 happens - a fresh exec is done - but it can happen when
3972 deliver_drop_privilege is set.
3974 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3975 it now includes up to 150 characters of the unexpected data in the log
3978 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3979 and building data strings. The size of both of these buffers was 10 000
3980 bytes - far larger than anybody would *ever* want, thought I. Needless to
3981 say, somebody hit the limit. I have increased the maximum line length to
3982 20 000 and the maximum data length of concatenated lines to 100 000. I have
3983 also fixed two bugs, because there was no checking on these buffers. Tsk,
3984 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3985 buffer is too small.
3987 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3988 lsearch lookups. Now it does.
3990 46. When parsing a route_list item in a manualroute router, a fixed-length
3991 buffer was used for the list of hosts. I made this 1024 bytes long,
3992 thinking that nobody would ever have a list of hosts that long. Wrong.
3993 Somebody had a whole pile of complicated expansion conditions, and the
3994 string was silently truncated, leading to an expansion error. It turns out
3995 that it is easier to change to an unlimited length (owing to other changes
3996 that have happened since this code was originally written) than to build
3997 structure for giving a limitation error. The length of the item that
3998 expands into the list of hosts is now unlimited.
4000 47. The lsearch lookup could not handle data where the length of text line was
4001 more than 4095 characters. Such lines were truncated, leading to shortened
4002 data being returned. It should now handle lines of any length.
4004 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4005 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4008 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4009 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4010 no longer happens in comment lines. A list of replacements is now placed
4011 at the head of all of the source files, except those whose only change is
4012 to replace PERL_COMMAND in the very first #! line.
4014 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4015 messages on the queue, with a bottom-up merge sort, using code contributed
4016 by Michael Haardt. This should make operations like -bp somewhat faster on
4017 large queues. It won't affect queue runners, except when queue_run_in_order
4020 51. Installed eximstats 1.31 in the distribution.
4022 52. Added support for SRV lookups to the dnslookup router.
4024 53. If an ACL referred to $message_body or $message_body_end, the value was not
4025 reset for any messages that followed in the same SMTP session.
4027 54. The store-handling optimization for building very long strings was not
4028 differentiating between the different store pools. I don't think this
4029 actually made any difference in practice, but I've tidied it.
4031 55. While running the routers to verify a sender address, $sender_address
4032 was still set to the sender address. This is wrong, because when routing to
4033 send a bounce to the sender, it would be empty. Therefore, I have changed
4034 it so that, while verifying a sender address, $sender_address is set to <>.
4035 (There is no change to what happens when verifying a recipient address.)
4037 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4038 target A or AAAA records (if not already returned) without resetting the
4039 qualify_single or search_parents options of the DNS resolver. These are
4040 inappropriate in this case because the targets of MX and SRV records must
4041 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4042 target that, when qualified, matched something in the local domain. These
4043 two options are now turned off when doing these lookups.
4045 57. It seems that at least some releases of Reiserfs (which does not have the
4046 concept of a fixed number of inodes) returns zero and not -1 for the
4047 number of available inodes. This interacted badly with check_spool_inodes,
4048 which assumed that -1 was the "no such thing" setting. What I have done is
4049 to check that the total number of inodes is greater than zero before doing
4050 the test of how many are available.
4052 58. When a "warn" ACL statement has a log_message modifier, the message is
4053 remembered, and not repeated. This is to avoid a lot of repetition when a
4054 message has many recipients that cause the same warning to be written.
4055 Howewer, Exim was preserving the list of already written lines for an
4056 entire SMTP session, which doesn't seem right. The memory is now reset if a
4057 new message is started.
4059 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4060 debugging output unless log_rewrite was also set.
4062 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4063 of (int)(handle) when we know that handle contains (void *)(-1).
4065 61. The Exim daemon panic-logs an error return when it closes the incoming
4066 connection. However "connection reset by peer" seems to be common, and
4067 isn't really an error worthy of noting specially, so that particular error
4070 62. When Exim is trying to find all the local interfaces, it used to panic and
4071 die if the ioctl to get the interface flags failed. However, it seems that
4072 on at least one OS (Solaris 9) it is possible to have an interface that is
4073 included in the list of interfaces, but for which you get a failure error
4074 for this call. This happens when the interface is not "plumbed" into a
4075 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4076 failure of the "get flags" call assumes that the interface is down.
4078 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4079 makes life easier for people who are doing arithmetic on fields extracted
4080 from dates, where you often get leading zeros that should not be
4081 interpreted as octal.
4083 64. Added qualify_domain to the redirect router, to override the global
4086 65. If a pathologically long header line contained very many addresses (the
4087 report of this problem mentioned 10 000) and each of them was rewritten,
4088 Exim could use up a very large amount of memory. (It kept on making new
4089 copies of the header line as it rewrote, and never released the old ones.)
4090 At the expense of a bit more processing, the header rewriting function has
4091 been changed so that it no longer eats memory in this way.
4093 66. The generation of the Received: header has been moved from the time that a
4094 message starts to be received, to the time that it finishes. The timestamp
4095 in the Received: header should now be very close to that of the <= log
4096 line. There are two side-effects of this change:
4098 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4099 logged header lines no longer include the local Received: line, because
4100 it has not yet been created. The same applies to a copy of the message
4101 that is returned to a non-SMTP sender when a message is rejected.
4103 (b) When a filter file is tested using -bf, no additional Received: header
4104 is added to the test message. After some thought, I decided that this
4107 This change does not affect the value of $received_for. It is still set
4108 after address rewriting, but before local_scan() is called.
4110 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4112 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4113 gave an unhelpful panic error message, and a defer error. I have managed to
4114 change this behaviour so that it now rejects any supplied certificate,
4115 which seems right, as the list of acceptable certificates is empty.
4117 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4118 gave an unhelpful defer error. I have not managed to make this reject any
4119 supplied certificates, but the error message it gives is "no certificate
4120 supplied", which is not helpful.
4122 70. exigrep's output now also includes lines that are not associated with any
4123 message, but which match the given pattern. Implemented by a patch from
4124 Martin Sluka, which also tidied up the Perl a bit.
4126 71. Recipient callout verification, like sender verification, was using <> in
4127 the MAIL FROM command. This isn't really the right thing, since the actual
4128 sender may affect whether the remote host accepts the recipient or not. I
4129 have changed it to use the actual sender in the callout; this means that
4130 the cache record is now keyed on a recipient/sender pair, not just the
4131 recipient address. There doesn't seem to be a real danger of callout loops,
4132 since a callout by the remote host to check the sender would use <>.
4133 [SEE ABOVE: changed after hitting problems.]
4135 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4136 temporary errors. However, in the case of such a code being given after
4137 the end of a data transmission (i.e. after ".") Exim was failing to write
4138 a retry record for the message. (Yes, there was some broken host that was
4139 actually sending 8xx at this point.)
4141 73. An unknown lookup type in a host list could cause Exim to panic-die when
4142 the list was checked. (An example that provoked this was putting <; in the
4143 middle of a list instead of at the start.) If this happened during a DATA
4144 ACL check, a -D file could be left lying around. This kind of configuration
4145 error no longer causes Exim to die; instead it causes a defer errror. The
4146 incident is still logged to the main and panic logs.
4148 74. Buglet left over from Exim 3 conversion. The message "too many messages
4149 in one connection" was written to the rejectlog but not the mainlog, except
4150 when address rewriting (yes!) was being logged.
4152 75. Added write_rejectlog option.
4154 76. When a system filter was run not as root (that is, when system_filter_user
4155 was set), the values of the $n variables were not being returned to the
4156 main process; thus, they were not subsequently available in the $sn
4159 77. Added +return_path_on_delivery log selector.
4161 78. A connection timeout was being treated differently from recipients deferred
4162 when testing hosts_max_try with a message that was older than the host's
4163 retry timeout. (The host should not be counted, thus allowing all hosts to
4164 be tried at least once before bouncing.) This may have been the cause of an
4165 occasionally reported bug whereby a message would remain on the queue
4166 longer than the retry timeout, but would be bounced if a delivery was
4167 forced. I say "may" because I never totally pinned down the problem;
4168 setting up timeout/retry tests is difficult. See also the next item.
4170 79. The ultimate address timeout was not being applied to errors that involved
4171 a combination of host plus message (for example, a timeout on a MAIL
4172 command). When an address resolved to a number of possible hosts, and they
4173 were not all tried for each delivery (e.g. because of hosts_max_try), a
4174 message could remain on the queue longer than the retry timeout.
4176 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4179 81. Fixed an obscure SMTP outgoing bug which required at least the following
4180 conditions: (a) there was another message waiting for the same server;
4181 (b) the server returned 5xx to all RCPT commands in the first message so
4182 that the message was not completed; (c) the server dropped the connection
4183 or gave a negative response to the RSET that Exim sends to abort the
4184 transaction. The observed case was a dropped connection after DATA that had
4185 been sent in pipelining mode. That is, the server had advertised PIPELINING
4186 but was not implementing it correctly. The effect of the bug was incorrect
4187 behaviour, such as trying another host, and this could lead to a crash.
4193 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4194 and daemon.c were passed as pointers to ints; they should have been
4195 pointers to socklen_t variables (which are typically unsigned ints).
4197 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4200 3. Fixed a really odd bug that affected only the testing scheme; patching a
4201 certain fixed string in the binary changed the value of another string that
4202 happened to be identical to the end of the original first string.
4204 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4205 name", it returns that address as the IP address. On some operating
4206 systems (e.g. Solaris), it also passes back the IP address string as the
4207 "host name". However, on others (e.g. Linux), it passes back an empty
4208 string. Exim wasn't checking for this, and was changing the host name to an
4209 empty string, assuming it had been canonicized.
4211 5. Although rare, it is permitted to have more than one PTR record for a given
4212 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4213 all the names associated with an address, because they do in Solaris.
4214 However, it seems that they do not in Linux for data that comes from the
4215 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4216 I found this out when I moved to a new Linux workstation and tried to run
4217 the Exim test suite.
4219 To get round this problem I have changed the code so that it now does its
4220 own call to the DNS to look up PTR records when searching for a host name.
4221 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4222 addresses that are only in /etc/hosts are still found.
4224 This behaviour is, however, controlled by an option called host_lookup_
4225 order, which defaults to "bydns:byaddr". If people want to use the other
4226 order, or indeed, just use one or the other means of lookup, they can
4227 specify it in this variable.
4229 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4230 some operating systems, this comes back from gethostbyaddr() as an empty
4231 string, and this is what Exim used to test for. However, it seems that in
4232 other systems, "." is yielded. Exim now tests for this case too.
4234 7. The values of check_spool_space and check_log_space are now held internally
4235 as a number of kilobytes instead of an absolute number of bytes. If a
4236 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4237 kilobyte. This means that much larger values can be stored.
4239 8. Exim monitor: an attempt to get the action menu when not actually pointing
4240 at a message produces an empty menu entitled "No message selected". This
4241 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4242 no entries in it ("Shell widget menu has zero width and/or height"). So I
4243 have added a single, blank menu entry in this case.
4245 9. Added ${quote_local_part.
4247 10. MIME decoding is now applied to the contents of Subject: header lines when
4250 11. Now that a reference to $sender_host_address automatically causes a reverse
4251 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4252 host lookup before query-style lookups in lists that might use this
4253 variable. This has therefore been abolished, and the "net-" prefix is no
4254 longer necessary for query-style lookups.
4256 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4257 have been a typo for LFLAGS, so it has been changed.
4259 13. The install script calls Exim with "-C /dev/null" in order to find the
4260 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4261 to be output. Howeve, since Exim outputs its version number before the
4262 error, it didn't break the script. It just looked ugly. I fixed this by
4263 always allowing "-C /dev/null" if the caller is root.
4265 14. Ignore overlarge ACL variable number when reading spool file - insurance
4266 against a later release with more variables having written the file.
4268 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4269 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4270 this, as well as the form without the "IPv6" on the front.
4272 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4273 OS/Makefile-Darwin file.
4275 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4276 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4278 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4279 variable. However, some OS use ints for inodes. I've added cast to long int
4280 to get rid of the compiler warning.
4282 19. I had forgotten to lock out "/../" in configuration file names when
4283 ALT_CONFIG_PREFIX was set.
4285 20. Routers used for verification do not need to specify transports. However,
4286 if such a router generated a host list, and callout was configured, Exim
4287 crashed, because it could not find a port number from the (non-existent)
4288 transport. It now assumes port 25 in this circumstance.
4290 21. Added the -t option to exigrep.
4292 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4293 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4294 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4295 them is set, LOOKUP_LSEARCH is forced.
4297 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4299 24. Added sender and host information to the "rejected by local_scan()" log
4300 line; previously there was no indication of these.
4302 25. Added .include_if_exists.
4304 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4305 Linux. It turns out that not all file systems support this. Apparently some
4306 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4307 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4308 not supported on the file descriptor, is now ignored when Exim is trying to
4309 sync a directory. This applies only to Linux.
4311 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4313 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4314 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4317 29. Added support for maildirsize files from supplied patch (modified a bit).
4319 30. The use of :fail: followed by an empty string could lead Exim to respond to
4320 sender verification failures with (e.g.):
4322 550 Verification failed for <xxx>
4323 550 Sender verify failed
4325 where the first response line was missing the '-' that indicates it is not
4326 the final line of the response.
4328 31. The loop for finding the name of the user that called Exim had a hardwired
4329 limit of 10; it now uses the value of finduser_retries, which is used for
4330 all other user lookups.
4332 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4335 33. Exim was neglecting to zero errno before one call of strtol() when
4336 expanding a string and expecting an integer value. On some systems this
4337 resulted in spurious "integer overflow" errors. Also, it was casting the
4338 result into an int without checking.
4340 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4341 did not work. The code looks as if it has *never* worked, though it appears
4342 to have been documented since at least releast 1.62. I have made it work.
4344 35. The "timeout_DNS" error in retry rules, also documented since at least
4345 1.62, also never worked. As it isn't clear exactly what this means, and
4346 clearly it isn't a major issue, I have abolished the feature by treating it
4347 as "timeout", and writing a warning to the main and panic logs.
4349 36. The display of retry rules for -brt wasn't always showing the error code
4352 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4353 timeout_connect_A, timeout_connect_MX.
4355 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4356 to the empty sender.
4358 39. The daemon was not analysing the content of -oX till after it had closed
4359 stderr and disconnected from the controlling terminal. This meant that any
4360 syntax errors were only noted on the panic log, and the return code from
4361 the command was 0. By re-arranging the code a little, I've made the
4362 decoding happen first, so such errors now appear on stderr, and the return
4363 code is 1. However, the actual setting up of the sockets still happens in
4364 the disconnected process, so errors there are still only recorded on the
4367 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4368 connections (as happens on some IP stacks) was logged at start up time as
4369 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4370 it from "IPv6 and IPv4", which means that two separate sockets are being
4373 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4374 says whether AF_INET or AF_INET6 was passed as an argument.
4376 42. Exiwhat output was messed up when time zones were included in log
4379 43. Exiwhat now gives more information about the daemon's listening ports,
4380 and whether -tls-on-connect was used.
4382 44. The "port" option of the smtp transport is now expanded.
4384 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4385 silently ignored. Now an error message is written to the main and panic
4388 46. There's a new ACL modifier called "logwrite" which writes to a log file
4389 as soon as it is encountered.
4391 47. Added $local_user_uid and $local_user_gid at routing time.
4393 48. Exim crashed when trying to verify a sender address that was being
4396 49. Exim was recognizing only a space character after ".include". It now also
4397 recognizes a tab character.
4399 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4400 extracting the relevant information from the specification. The man page no
4401 longer contains scrambled data for the -d option, and I've added a section
4402 at the front about calling Exim under different names.
4404 51. Added "extra_headers" argument to the "mail" command in filter files.
4406 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4409 53. Installed eximstats 1.29.
4411 54. Added transport_filter_timeout as a generic transport option.
4413 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4414 Cc: header lines. This was required by RFC 822, but it not required by RFC
4417 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4418 incoming messages that did not have them. Now it does so only if the
4419 message originates locally, that is, if there is no associated remote host
4420 address. When Resent- header lines are present, this applies to the Resent-
4421 lines rather than the non-Resent- lines.
4423 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4424 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4426 58. Messages for configuration errors now include the name of the main
4427 configuration file - useful now that there may be more than one file in a
4428 list (.included file names were always shown).
4430 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4431 for those rare installations that do not start the daemon as root or run it
4432 setuid root. I've cut out the call to initgroups() if the daemon is not
4435 60. The Exim user and group can now be bound into the binary as text strings
4436 that are looked up at the start of Exim's processing.
4438 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4440 62. Added $mailstore_basename variable.
4442 63. Installed patch to sieve.c from Michael Haardt.
4444 64. When Exim failed to open the panic log after failing to open the main log,
4445 the original message it was trying to log was written to stderr and debug
4446 output, but if they were not available (the usual case in production), it
4447 was lost. Now it is written to syslog before the two lines that record the
4448 failures to open the logs.
4450 65. Users' Exim filters run in subprocesses under the user's uid. It is
4451 possible for a "deliver" command or an alias in a "personal" command to
4452 provoke an address rewrite. If logging of address rewriting is configured,
4453 this fails because the process is not running as root or exim. There may be
4454 a better way of dealing with this, but for the moment (because 4.30 needs
4455 to be released), I have disabled address rewrite logging when running a
4456 filter in a non-root, non-exim process.
4462 1. The buildconfig auxiliary program wasn't quoting the value set for
4463 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4464 not defined. This bug was masked in 4.22 by the effect that was fixed in
4467 2. Some messages that were rejected after a message id was allocated were
4468 shown as "incomplete" by exigrep. It no longer does this for messages that
4469 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4471 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4472 have allow_domain_literals set, the ID did not get logged in the <= line.
4473 Domain literals are now always recognized in Message-ID: header lines.
4475 4. The first argument for a ${extract expansion item is the key name or field
4476 number. Leading and trailing spaces in this item were not being ignored,
4477 causing some misleading effects.
4479 5. When deliver_drop_privilege was set, single queue runner processes started
4480 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4481 same command in the process it spins off) were not dropping privilege.
4483 6. When the daemon running as "exim" started a queue runner, it always
4484 re-executed Exim in the spun-off process. This is a waste of effort when
4485 deliver_drop_privilege is set. The new process now just calls the
4486 queue-runner function directly.
4492 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4495 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4496 ignored. Though the use of -oP was forcing the writing of a pid file, it
4497 was always written to the default place.
4499 3. If the message "no IP address found for host xxxx" is generated during
4500 incoming verification, it is now followed by identification of the incoming
4501 connection (so you can more easily find what provoked it).
4503 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4505 5. Added some features to "harden" Exim a bit more against certain attacks:
4507 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4508 be put in Local/Makefile. This is like the never_users runtime option,
4509 but it cannot be overridden. The default setting is "root".
4511 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4512 prefix string with which any file named in a -C command line option
4515 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4516 is retained for -C and -D only if the caller of Exim is root. Without
4517 it, the exim user may also use -C and -D and retain privilege.
4519 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4520 command line option is disabled.
4522 6. Macro names set by the -D option must start with an upper case letter, just
4523 like macro names defined in the configuration file.
4525 7. Added "dereference=" facility to LDAP.
4527 8. Two instances of the typo "uknown" in the source files are fixed.
4529 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4530 the Configure-Makefile script screwed up while processing it.
4532 10. Incorporated PCRE 4.4.
4534 11. The SMTP synchronization check was not operating right at the start of an
4535 SMTP session. For example, it could not catch a HELO sent before the client
4536 waited for the greeting. There is now a check for outstanding input at the
4537 point when the greeting is written. Because of the duplex, asynchronous
4538 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4539 way, but not yet received, when the check is performed.
4541 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4542 on TCP/IP sockets, because this apparently causes some broken clients to
4545 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4546 unchanged) from the Cygwin maintainer.
4548 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4549 was supported instead of testing for mbx. Effectively a typo.
4551 15. The spa authenticator server code was not checking that the input it
4552 received was valid base64.
4554 16. The debug output line for the "set" modifier in ACLs was not showing the
4555 name of the variable that was being set.
4557 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4559 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4560 lookup on its own. Something else was needed to trigger the lookup. For
4561 example, a match in host_lookup or the need for a host name in a host list.
4562 Now, if $sender_host_name is referenced and the host name has not yet been
4563 looked up, a lookup is performed. If the lookup fails, the variable remains
4564 empty, and $host_lookup_failed is set to "1".
4566 19. Added "eqi" as a case-independent comparison operator.
4568 20. The saslauthd authentication condition could segfault if neither service
4569 nor realm was specified.
4571 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4572 error message that was logged was misleading, and incoming SMTP
4573 connections were dropped. The message is now more accurate, and temporary
4574 errors are given to SMTP connections.
4576 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4577 (except RSET) with a 421 error, until QUIT is received. However, it was
4578 failing to send a response to QUIT.
4580 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4581 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4582 ACL is now run after the helo_try_verify_hosts code.
4584 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4585 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4586 case-independent, so other case variants are also recognized). Apparently
4587 some systems use these upper case variants.
4589 25. If more than two messages were waiting for the same host, and a transport
4590 filter was specified for the transport, Exim sent two messages over the
4591 same TCP/IP connection, and then failed with "socket operation on non-
4592 socket" when it tried to send the third.
4594 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4596 27. The extern definition of crypt16() in expand.c was not being excluded when
4597 the OS had its own crypt16() function.
4599 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4600 as a preferred synonym for return_size_limit, both as an option and as an
4603 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4605 30. Changed the default configuration ACL to relax the local part checking rule
4606 for addresses that are not in any local domains. For these addresses,
4607 slashes and pipe symbols are allowed within local parts, but the sequence
4608 /../ is explicitly forbidden.
4610 31. SPA server authentication was not clearing the challenge buffer before
4613 32. log_message in a "warn" ACL statement was writing to the reject log as
4614 well as to the main log, which contradicts the documentation and doesn't
4615 seem right (because no rejection is happening). So I have stopped it.
4617 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4618 However, I am unable to do any testing of this.
4620 34. Fixed an infelicity in the appendfile transport. When checking directories
4621 for a mailbox, to see if any needed to be created, it was accidentally
4622 using path names with one or more superfluous leading slashes; tracing
4623 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4625 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4626 contents are added to the log line that is written for every discarded
4627 recipient. (Previously a log_message setting was ignored.)
4629 36. The ${quote: operator now quotes the string if it is empty.
4631 37. The install script runs exim in order to find its version number. If for
4632 some reason other than non-existence or emptiness, which it checks, it
4633 could not run './exim', it was installing it with an empty version number,
4634 i.e. as "exim-". This error state is now caught, and the installation is
4637 38. An argument was missing from the function that creates an error message
4638 when Exim fails to connect to the socket for saslauthd authentication.
4639 This could cause Exim to crash, or give a corrupted message.
4641 39. Added isip, isip4, and isip6 to ${if conditions.
4643 40. The ACL variables $acl_xx are now saved with the message, and can be
4644 accessed later in routers, transports, and filters.
4646 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4647 strings in the file are not string-expanded.
4649 42. If a MAIL command specified a SIZE value that was too large to fit into an
4650 int variable, the check against message_size_limit failed. Such values are
4651 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4652 day this will have to be increased, but I don't think I want to be around
4653 when emails are that large.
4660 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4661 iconv() is not standard in FreeBSD.
4663 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4664 IPv6 enabled. The observed symptom was a segmentation fault on return from
4665 the function os_common_find_running_interfaces() in src/os.c.
4667 3. In the check_special_case() function in daemon.c I had used "errno" as an
4668 argument name, which causes warnings on some systems. This was basically a
4669 typo, since it was named "eno" in the comments!
4671 4. The code that waits for the clock to tick (at a resolution of some fraction
4672 of a second) so as to ensure message-id uniqueness was always waiting for
4673 at least one whole tick, when it could have waited for less. [This is
4674 almost certainly not relevant at current processor speeds, where it is
4675 unlikely to ever wait at all. But we try to future-proof.]
4677 5. The function that sleeps for a time interval that includes fractions of a
4678 second contained a race. It did not block SIGALRM between setting the
4679 timer, and suspending (a couple of lines later). If the interval was short
4680 and the sigsuspend() was delayed until after it had expired, the suspension
4681 never ended. On busy systems this could lead to processes getting stuck for
4684 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4685 process, before it forks any delivery processes. The open lookup caching
4686 mechanism meant that the open file or database connection was passed into
4687 the delivery process. The problem was that delivery processes always tidy
4688 up cached lookup data. This could cause a problem for the next delivery
4689 process started by the queue runner, because the external queue runner
4690 process does not know about the closure. So the next delivery process
4691 still has data in the lookup cache. In the case of a file lookup, there was
4692 no problem because closing a file descriptor in a subprocess doesn't affect
4693 the parent. However, if the lookup was caching a connection to a database,
4694 the connection was closed, and the second delivery process was likely to
4695 see errors such as "PGSQL: query failed: server closed the connection
4696 unexpectedly". The problem has been fixed by closing all cached lookups
4697 in a queue runner before running a delivery process.
4699 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4700 seem to have the "const" qualifier which it has on other OS. I've
4703 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4704 *of the same type* (client or server) with the same public name that an
4705 error should be diagnosed.
4707 9. When Exim looked up a host name for an IP address, but failed to find the
4708 original IP address when looking up the host name (a safety check), it
4709 output the message "<ip address> does not match any IP for NULL", which was
4710 confusing, to say the least. The bug was that the host name should have
4711 appeared instead of "NULL".
4713 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4714 user that is built into the binary, and the -C or -D options is used, root
4715 privilege is dropped before the configuration file is read. In addition,
4716 logging is switched to stderr instead of the normal log files. If the
4717 configuration then re-defines the Exim user, the unprivileged environment
4718 is probably not what is expected, so Exim logs a panic warning message (but
4721 However, if deliver_drop_privilege is set, the unprivileged state may well
4722 be exactly what is intended, so the warning has been cut out in that case,
4723 and Exim is allowed to try to write to its normal log files.
4729 1. smtp_return_error_details was not giving details for temporary sender
4730 or receiver verification errors.
4732 2. Diagnose a configuration error if two authenticators have the same public
4735 3. Exim used not to create the message log file for a message until the first
4736 delivery attempt. This could be confusing when incoming messages were held
4737 for policy or load reasons. The message log file is now created at the time
4738 the message is received, and an initial "Received" line is written to it.
4740 4. The automatically generated man page for command line options had a minor
4741 bug that caused no ill effects; however, a more serious problem was that
4742 the procedure for building the man page automatically didn't always
4743 operate. Consequently, release 4.20 contains an out-of-date version. This
4744 shouldn't happen again.
4746 5. When building Exim with embedded Perl support, the script that builds the
4747 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4748 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4750 6. The freeze_tell option was not being used for messages that were frozen on
4751 arrival, either by an ACL or by local_scan().
4753 7. Added the smtp_incomplete_transaction log selector.
4755 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4756 was accepting AUTH without a new EHLO.
4758 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4759 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4762 10. Logging of TCP/IP connections (when configured) now happens in the main
4763 daemon process instead of the child process, so that the TCP/IP connection
4764 count is more accurate (but it can never be perfect).
4766 11. The use of "drop" in a nested ACL was not being handled correctly in the
4767 outer ACL. Now, if condition failure induced by the nested "drop" causes
4768 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4769 or "require"), the connection is dropped.
4771 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4772 that yield "discard" can now be used with an "accept" or a "discard" verb,
4773 but an error is generated for any others (because I can't see a useful way
4774 to define what should happen).
4776 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4777 are now processed in the same way as lines in the Exim configuration file.
4778 In particular, continuation lines are supported.
4780 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4782 15. Added -ti meaning -t -i.
4784 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4785 domains, and warn by logging if others are found.
4787 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4788 returned from GIFCONF when Exim is trying to find the list of interfaces on
4789 a host. The code in os.c has been modified to copy each ifreq to an aligned
4790 structure in all cases.
4792 Also, in some cases, the returned ifreq's were being copied to a 'struct
4793 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4794 means the last couple of bytes of an IPv6 address could be chopped if the
4795 ifreq contained only a normal sockaddr (14 bytes storage).
4797 18. Named domain lists were not supported in the hosts_treat_as_local option.
4798 An entry such as +xxxx was not recognized, and was treated as a literal
4801 19. Ensure that header lines added by a DATA ACL are included in the reject log
4802 if the ACL subsequently rejects the message.
4804 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4805 MD5 (which is deprecated).
4807 21. When testing a filter file using -bf, Exim was writing a message when it
4808 took the sender from a "From " line in the message, but it was not doing so
4809 when it took $return_path from a Return-Path: header line. It now does.
4811 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4812 with a valid header line field name (a series of printing characters
4813 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4815 23. Changed "disc" in the source to "disk" to conform to the documentation and
4816 the book and for uniformity.
4818 24. Ignore Sendmail's -Ooption=value command line item.
4820 25. When execve() failed while trying to run a command in a pipe transport,
4821 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4822 could be confused with a return value of 69 from the command itself. This
4823 has been changed to 127, the value the shell returns if it is asked to run
4824 a non-existent command. The wording for the related log line suggests a
4825 non-existent command as the problem.
4827 26. If received_header_text expands to an empty string, do not add a Received:
4828 header line to the message. (Well, it adds a token one on the spool, but
4829 marks it "old" so that it doesn't get used or transmitted.)
4831 27. Installed eximstats 1.28 (addition of -nt option).
4833 28. There was no check for failure on the call to getsockname() in the daemon
4834 code. This can fail if there is a shortage of resources on the system, with
4835 ENOMEM, for example. A temporary error is now given on failure.
4837 29. Contrary to the C standard, it seems that in some environments, the
4838 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4839 program. Exim now does this explicitly; it affects the formatting of
4840 timestamps using strftime().
4842 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4843 complaints. I've now initialized all the variables, to avoid this.
4845 32. Header lines added by a system filter were not being "seen" during
4846 transport-time rewrites.
4848 33. The info_callback() function passed to OpenSSL is set up with type void
4849 (*)(SSL *, int, int), as described somewhere. However, when calling the
4850 function (actually a macro) that sets it up, the type void(*)() is
4851 expected. I've put in a cast to prevent warnings from picky compilers.
4853 34. If a DNS black list lookup found a CNAME record, but there were no A
4854 records associated with the domain it pointed at, Exim crashed.
4856 35. If a DNS black list lookup returned more than one A record, Exim ignored
4857 all but the first. It now scans all returned addresses if a particular IP
4858 value is being sought. In this situation, the contents of the
4859 $dnslist_value variable are a list of all the addresses, separated by a
4862 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4863 to accept a host name and all its aliases if the forward lookup for any of
4864 them yielded the IP address of the incoming connection. Now it accepts only
4865 those names whose forward lookup yields the correct IP address. Any other
4866 names are discarded. This closes a loophole whereby a rogue DNS
4867 administrator could create reverse DNS records to break through a
4868 wildcarded host restriction in an ACL.
4870 37. If a user filter or a system filter that ran in a subprocess used any of
4871 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4872 the wrong values were passed to the pipe command ($thisaddress had the
4873 value of $0, $0 had the value of $1, etc). This bug was introduced by
4874 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4876 38. Improved the line breaking for long SMTP error messages from ACLs.
4877 Previously, if there was no break point between 40 and 75 characters, Exim
4878 left the rest of the message alone. Two changes have been made: (a) I've
4879 reduced the minimum length to 35 characters; (b) if it can't find a break
4880 point between 35 and 75 characters, it looks ahead and uses the first one
4881 that it finds. This may give the occasional overlong line, but at least the
4882 remaining text gets split now.
4884 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4885 file descriptors might be low, and that setting 1000 would always raise it.
4886 It turns out that in some environments, the limit is already over 1000 and
4887 that lowering it causes trouble. So now Exim takes care not to decrease it.
4889 40. When delivering a message, the value of $return_path is set to $sender_
4890 address at the start of routing (routers may change the value). By an
4891 oversight, this default was not being set up when an address was tested by
4892 -bt or -bv, which affected the outcome if any router or filter referred to
4895 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4896 log only when "message" or "log_message" are set. However, if one of the
4897 conditions was an address verification, or a call to a nested ACL, the
4898 messages generated by the underlying test were being passed through. This
4899 no longer happens. The underlying message is available in $acl_verify_
4900 message for both "message" and "log_message" expansions, so it can be
4901 passed through if needed.
4903 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4904 new expansion $bh_ to give the encoded byte string without charset
4905 translation. Translation happens only if iconv() is available; HAVE_ICONV
4906 indicates this at build time. HEADERS_CHARSET gives the charset to
4907 translate to; headers_charset can change it in the configuration, and
4908 "headers charset" can change it in an individual filter file.
4910 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4911 that creates RFC 2047 encoded "words" labels them as that charset instead
4912 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4913 expansion operator; (ii) when Exim creates a From: line for a local
4914 message; (iii) when a header line is rewritten to include a "phrase" part.
4916 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4917 buggy, causing it to skip the first lines of messages whose message ID
4918 ended in 'D'. This would not have bitten before Exim release 4.14, because
4919 message IDs were unlikely to end in 'D' before then. The effect was to have
4920 incorrect size information for certain domains.
4922 45. #include "config.h" was missing at the start of the crypt16.c module. This
4923 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4926 46. If there was a timeout during a "random" callout check, Exim treated it as
4927 a failure of the random address, and carried on sending RSET and the real
4928 address. If the delay was just some slowness somewhere, the response to the
4929 original RCPT would be taken as a response to RSET and so on, causing
4930 mayhem of various kinds.
4932 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4933 when I implemented it. It didn't allow for the fact that some option values
4934 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4935 the right test for positive values.
4937 48. Domain names in DNS records are case-independent. Exim always looks them up
4938 in lower case. Some resolvers return domain names in exactly the case they
4939 appear in the zone file, that is, they may contain uppercase letters. Not
4940 all resolvers do this - some return always lower case. Exim was treating a
4941 change of case by a resolver as a change of domain, similar to a widening
4942 of a domain abbreviation. This triggered its re-routing code and so it was
4943 trying to route what was effectively the same domain again. This normally
4944 caused routing to fail (because the router wouldn't handle the domain
4945 twice). Now Exim checks for this case specially, and just changes the
4946 casing of the domain that it ultimately uses when it transmits the message
4949 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4952 50. If a filter generated a file delivery with a non-absolute name (possible if
4953 no home directory exists for the router), the forbid_file option was not
4956 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4957 the existing equality matching.
4959 52. Exim was using ints instead of ino_t variables in some places where it was
4960 dealing with inode numbers.
4962 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4963 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4964 called TMPDIR, and if it finds it is different, it changes its value.
4966 54. The smtp_printf() function is now made available to local_scan() so
4967 additional output lines can be written before returning. There is also an
4968 smtp_fflush() function to enable the detection of a dropped connection.
4969 The variables smtp_input and smtp_batched_input are exported to
4972 55. Changed the default runtime configuration: the message "Unknown user"
4973 has been removed from the ACL, and instead placed on the localuser router,
4974 using the cannot_route_message feature. This means that any verification
4975 failures that generate their own messages won't get overridden. Similarly,
4976 the "Unrouteable address" message that was in the ACL for unverifiable
4977 relay addresses has also been removed.
4979 56. Added hosts_avoid_esmtp to the smtp transport.
4981 57. The exicyclog script was not checking for the esoteric option
4982 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4983 will work only if exicyclog is run under the appropriate euid.
4985 58. Following a discussion on the list, the rules by which Exim recognises line
4986 endings on incoming messages have been changed. The -dropcr and drop_cr
4987 options are now no-ops, retained only for backwards compatibility. The
4988 following line terminators are recognized: LF CRLF CR. However, special
4989 processing applies to CR:
4991 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4992 nor a local message in the state where . is a terminator.
4994 (ii) If a bare CR is encountered in a header line, an extra space is added
4995 after the line terminator so as not to end the header. The reasoning
4996 behind this is that bare CRs in header lines are most likely either
4997 to be mistakes, or people trying to play silly games.
4999 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5000 was being incorrectly given as 18 bytes larger than it should have been.
5001 This is a VOB (very old bug).
5003 60. This may never have affected anything current, but just in case it has:
5004 When the local host is found other than at the start of a list of hosts,
5005 the local host, those with the same MX, and any that follow, are discarded.
5006 When the list in question was part of a longer list of hosts, the following
5007 hosts (not currently being processed) were also being discarded. This no
5008 longer happens. I'm not sure if this situation could ever has previously
5011 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5014 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5015 header. This is something that is recommended in a new Internet Draft, and
5016 is something that is documented as being done by Sendmail. There are two
5017 possible values. For messages generated by the autoreply transport, Exim
5020 Auto-Submitted: auto-replied
5022 whereas for all other generated messages (e.g. bounces) it adds
5024 Auto-Submitted: auto-generated
5026 63. The "personal" condition in filters now includes a test for the
5027 Auto-Submitted: header. If it contains the string "auto-" the message it
5028 not considered personal.
5030 64. Added rcpt_include_affixes as a generic transport option.
5032 65. Added queue_only_override (default true).
5034 66. Added the syslog_duplication option.
5036 67. If what should have been the first header line of a message consisted of
5037 a space followed by a colon, Exim was mis-interpreting it as a header line.
5038 It isn't of course - it is syntactically invalid and should therefore be
5039 treated as the start of the message body. The misbehaviour could have
5040 caused a number of strange effects, including loss of data in subsequent
5041 header lines, and spool format errors.
5043 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5044 client host had authenticated. This control can now be exercised by an ACL
5045 for more flexibility.
5047 69. By default, callouts do not happen when testing with -bh. There is now a
5048 variant, -bhc, which does actually run the callout code, including
5049 consulting and updating the callout cache.
5051 70. Added support for saslauthd authentication, courtesy of Alexander
5054 71. If statvfs() failed on the spool or log directories while checking their
5055 size for availability, Exim confusingly gave the error "space shortage".
5056 Furthermore, in debugging mode it crashed with a floating point exception.
5057 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5058 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5059 serious problem, Exim now writes to the main and panic logs when this
5060 happens, with details of the failure. It then refuses to accept the
5061 incoming message, giving the message "spool directory problem" or "log
5062 directory problem" with a 421 code for SMTP messages.
5064 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5065 0, 1, and 2 exist, because some OS complain for execs without them (see
5066 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5067 descriptors. However, the code omitted to check that the open succeeded,
5068 causing mysterious errors if for some reason the permissions on /dev/null
5069 got screwed. Now Exim writes a message to the main and panic logs, and
5070 bombs out if it can't open /dev/null.
5072 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5073 interact so that it is all more flexible. It is supposed to remain
5074 backwards compatible. Also added extra_local_interfaces.
5076 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5077 to bomb out with an assertion failure - to the client this appears as a
5078 connection drop. This problem occurs in the part of the code that was taken
5079 from the Samba project. Fortunately, the assertion is in a very simple
5080 function, so I have fixed this by reproducing the function inline in the
5081 one place where it is called, and arranging for authentication to fail
5082 instead of killing the process with assert().
5084 75. The SPA client code was not working when the server requested OEM rather
5085 than Unicode encoding.
5087 76. Added code to make require_files with a specific uid setting more usable in
5088 the case where statting the file as root fails - usually a non-root-mounted
5089 NFS file system. When this happens and the failure is EACCES, Exim now
5090 forks a subprocess and does the per-uid checking as the relevant uid.
5092 77. Added process_log_path.
5094 78. If log_file_path was not explicitly set, a setting of check_log_space or
5095 check_log_inodes was ignored.
5097 79. If a space check for the spool or log partitions fails, the incident is now
5098 logged. Of course, in the latter case the data may get lost...
5100 80. Added the %p formatting code to string_format() so that it can be used to
5101 print addresses in debug_print(). Adjusted all the address printing in the
5102 debugging in store.c to use %p rather than %d.
5104 81. There was a concern that a line of code in smtp_in.c could overflow a
5105 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5106 initially expressed, the concern was not well-founded, because trailing
5107 spaces are removed early. However, if the trailing spaces were followed by
5108 a NULL, they did not get removed, so the overflow was possible. Two fixes
5111 (a) I re-wrote the offending code in a cleaner fashion.
5112 (b) If an incoming SMTP command contains a NULL character, it is rejected
5115 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5116 runs initgroups(), so that if the Exim user is in any additional groups,
5117 they will be used during message reception.
5123 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob