1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.629 2010/06/07 08:23:20 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.
45 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
47 PP/15 Bugzilla 816: support multiple condition rules on Routers.
49 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
50 condition rules, instead of bool{}.
56 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
57 $data_path, and $header_path variables; fixed documentation bugs and
60 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
61 exipick to access non-standard spools, including the "frozen" queue
64 NM/01 Bugzilla 965: Support mysql stored procedures.
65 Patch from Alain Williams
67 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
69 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
70 Patch from Andreas Metzler
72 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
73 Patch from Kirill Miazine
75 NM/05 Bugzilla 671: Added umask to procmail example.
77 JJ/03 installed exipick 20100323.0, fixing doc bug
79 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
80 directory. Notification and patch from Dan Rosenberg.
82 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
84 TK/02 Improve log output when DKIM signing operation fails.
86 MH/01 Treat the transport option dkim_domain as a colon separated
87 list, not as a single string, and sign the message with each element,
88 omitting multiple occurences of the same signer.
90 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
91 Bugzilla 985, 986. Patch by Simon Arlott
93 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
96 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
97 MBX locking. Notification from Dan Rosenberg.
103 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
105 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
107 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
109 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
111 NM/04 Bugzilla 915: Flag broken perl installation during build.
117 TK/01 Added patch by Johannes Berg that expands the main option
118 "spamd_address" if it starts with a dollar sign.
120 TK/02 Write list of recipients to X-Envelope-Sender header when building
121 the mbox-format spool file for content scanning (suggested by Jakob
124 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
125 (http://www.dcc-servers.net/) support via dccifd. Activated by
126 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
128 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
129 by Mark Daniel Reidel <mr@df.eu>.
131 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
132 When building exim an external PCRE library is now needed -
133 PCRE is a system library on the majority of modern systems.
134 See entry on PCRE_LIBS in EDITME file.
136 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
137 conversation. Added nologin parameter to request.
138 Patch contributed by Kirill Miazine.
140 TF/01 Do not log submission mode rewrites if they do not change the address.
142 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
144 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
145 log files in place. Contributed by Roberto Lima.
147 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
149 TF/03 Bugzilla 615: When checking the local_parts router precondition
150 after a local_part_suffix or local_part_prefix option, Exim now
151 does not use the address's named list lookup cache, since this
152 contains cached lookups for the whole local part.
154 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
155 Robert Millan. Documentation is in experimental-spec.txt.
157 TF/04 Bugzilla 668: Fix parallel build (make -j).
159 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
161 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
162 Patch provided by Jan Srzednicki.
164 TF/05 Leading white space used to be stripped from $spam_report which
165 wrecked the formatting. Now it is preserved.
167 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
168 that they are available at delivery time.
170 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
172 TF/08 TLS error reporting now respects the incoming_interface and
173 incoming_port log selectors.
175 TF/09 Produce a more useful error message if an SMTP transport's hosts
176 setting expands to an empty string.
178 NM/06 Bugzilla 744: EXPN did not work under TLS.
179 Patch provided by Phil Pennock.
181 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
182 Patch provided by Richard Godbee.
184 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
185 acl_smtp_notquit, added index entry.
187 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
188 Patch provided by Eugene Bujak.
190 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
191 accept(). Patch provided by Maxim Dounin.
193 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
194 Patch provided by Phil Pennock.
196 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
198 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
199 Patch provided by Brad "anomie" Jorsch.
201 NM/14 Bugzilla 622: Added timeout setting to transport filter.
202 Patch provided by Dean Brooks.
204 TK/05 Add native DKIM support (does not depend on external libraries).
206 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
207 Patch provided by Graeme Fowler.
209 NM/16 Bugzilla 851: Documentation example syntax fix.
211 NM/17 Changed NOTICE file to remove references to embedded PCRE.
213 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
216 NM/19 Bugzilla 745: TLS version reporting.
217 Patch provided by Phil Pennock.
219 NM/20 Bugzilla 167: bool: condition support.
220 Patch provided by Phil Pennock.
222 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
223 clients. Patch provided by Phil Pennock.
225 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
226 Patch provided by Brad "anomie" Jorsch.
228 NM/23 Bugzilla 687: Fix misparses in eximstats.
229 Patch provided by Heiko Schlittermann.
231 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
232 Patch provided by Heiko Schlittermann.
234 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
235 plus update to original patch.
237 NM/26 Bugzilla 799: Documentation correction for ratelimit.
239 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
240 Patch provided by David Brownlee.
242 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
244 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
246 NM/30 Bugzilla 888: TLS documentation bugfixes.
248 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
250 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
251 Unlike the original bugzilla I have changed all shell scripts in src tree.
253 NM/33 Bugzilla 898: Transport filter timeout fix.
254 Patch by Todd Rinaldo.
256 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
257 Patch by Serge Demonchaux.
259 NM/35 Bugzilla 39: Base64 decode bug fixes.
260 Patch by Jakob Hirsch.
262 NM/36 Bugzilla 909: Correct connect() call in dcc code.
264 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
266 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
268 NM/39 Bugzilla 911: Fixed MakeLinks build script.
274 TK/01 Add preliminary DKIM support. Currently requires a forked version of
275 ALT-N's libdkim that I have put here:
276 http://duncanthrax.net/exim-experimental/
278 Note to Michael Haardt: I had to rename some vars in sieve.c. They
279 were called 'true' and it seems that C99 defines that as a reserved
280 keyword to be used with 'bool' variable types. That means you could
281 not include C99-style headers which use bools without triggering
282 build errors in sieve.c.
284 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
285 as mailq or other aliases. Changed the --help handling significantly
286 to do whats expected. exim_usage() emits usage/help information.
288 SC/01 Added the -bylocaldomain option to eximstats.
290 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
292 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
294 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
300 PH/01 Another patch from the Sieve maintainer.
302 PH/02 When an IPv6 address is converted to a string for single-key lookup
303 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
304 dots are used instead of colons so that keys in lsearch files need not
305 contain colons. This was done some time before quoting was made available
306 in lsearch files. However, iplsearch files do require colons in IPv6 keys
307 (notated using the quote facility) so as to distinguish them from IPv4
308 keys. This meant that lookups for IP addresses in host lists did not work
309 for iplsearch lookups.
311 This has been fixed by arranging for IPv6 addresses to be expressed with
312 colons if the lookup type is iplsearch. This is not incompatible, because
313 previously such lookups could never work.
315 The situation is now rather anomolous, since one *can* have colons in
316 ordinary lsearch keys. However, making the change in all cases is
317 incompatible and would probably break a number of configurations.
319 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
322 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
323 conversion specification without a maximum field width, thereby enabling
324 a rogue spamd server to cause a buffer overflow. While nobody in their
325 right mind would setup Exim to query an untrusted spamd server, an
326 attacker that gains access to a server running spamd could potentially
327 exploit this vulnerability to run arbitrary code as the Exim user.
329 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
330 $primary_hostname instead of what libspf2 thinks the hosts name is.
332 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
333 a directory entry by the name of the lookup key. Previously, if a
334 symlink pointed to a non-existing file or a file in a directory that
335 Exim lacked permissions to read, a lookup for a key matching that
336 symlink would fail. Now it is enough that a matching directory entry
337 exists, symlink or not. (Bugzilla 503.)
339 PH/03 The body_linecount and body_zerocount variables are now exported in the
342 PH/04 Added the $dnslist_matched variable.
344 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
345 This means they are set thereafter only if the connection becomes
348 PH/06 Added the client_condition to authenticators so that some can be skipped
349 by clients under certain conditions.
351 PH/07 The error message for a badly-placed control=no_multiline_responses left
352 "_responses" off the end of the name.
354 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
356 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
357 (without spaces) instead of just copying the configuration text.
359 PH/10 Added the /noupdate option to the ratelimit ACL condition.
361 PH/11 Added $max_received_linelength.
363 PH/12 Added +ignore_defer and +include_defer to host lists.
365 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
366 way in which PCRE > 7.0 is built.
368 PH/14 Implemented queue_only_load_latch.
370 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
371 MAIL command. The effect was to mangle the value on 64-bit systems.
373 PH/16 Another patch from the Sieve maintainer.
375 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
377 PH/18 If a system quota error occurred while trying to create the file for
378 a maildir delivery, the message "Mailbox is full" was not appended to the
379 bounce if the delivery eventually timed out. Change 4.67/27 below applied
380 only to a quota excession during the actual writing of the file.
382 PH/19 It seems that peer DN values may contain newlines (and other non-printing
383 characters?) which causes problems in log lines. The DN values are now
384 passed through string_printing() before being added to log lines.
386 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
387 and InterBase are left for another time.)
389 PH/21 Added message_body_newlines option.
391 PH/22 Guard against possible overflow in moan_check_errorcopy().
393 PH/23 POSIX allows open() to be a macro; guard against that.
395 PH/24 If the recipient of an error message contained an @ in the local part
396 (suitably quoted, of course), incorrect values were put in $domain and
397 $local_part during the evaluation of errors_copy.
403 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
404 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
407 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
408 issue a MAIL command.
410 PH/02 In an ACL statement such as
412 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
414 if a client was not listed at all, or was listed with a value other than
415 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
416 the condition was not true (as it should be), so access was not denied.
417 The bug was that the ! inversion was incorrectly passed on to the second
418 item. This has been fixed.
420 PH/03 Added additional dnslists conditions == and =& which are different from
421 = and & when the dns lookup returns more than one IP address.
423 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
424 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
426 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
427 FSYNC, which compiles an option called disable_fsync that allows for
428 bypassing fsync(). The documentation is heavily laced with warnings.
430 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
432 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
433 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
434 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
435 including adding "make clean"; (3) Added -fPIC when compiling the test
436 dynamically loaded module, to get rid of a warning.
438 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
439 message fails, move_frozen_messages = true and ignore_bounce_errors_after
440 = 0s. The bug is otherwise harmless.
442 PH/07 There was a bug in the dovecot authenticator such that the value of
443 $auth1 could be overwritten, and so not correctly preserved, after a
444 successful authentication. This usually meant that the value preserved by
445 the server_setid option was incorrect.
447 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
449 PH/09 Installed PCRE release 7.0.
451 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
452 run for batched SMTP input. It is now run at the start of every message
453 in the batch. While fixing this I discovered that the process information
454 (output by running exiwhat) was not always getting set for -bs and -bS
455 input. This is fixed, and it now also says "batched" for BSMTP.
457 PH/11 Added control=no_pipelining.
459 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
460 patch, slightly modified), and move the expansion of helo_data till after
461 the connection is made in the smtp transport (so it can use these
464 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
466 PH/14 Added log_selector = +pid.
468 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
470 PH/16 Add ${if forany and ${if forall.
472 PH/17 Added dsn_from option to vary the From: line in DSNs.
474 PH/18 Flush SMTP output before performing a callout, unless control =
475 no_callout_flush is set.
477 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
478 was true (the default) a successful delivery failed to delete the retry
479 item, thus causing premature timeout of the address. The bug is now
482 PH/20 Added hosts_avoid_pipelining to the smtp transport.
484 PH/21 Long custom messages for fakedefer and fakereject are now split up
485 into multiline reponses in the same way that messages for "deny" and
486 other ACL rejections are.
488 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
489 with slight modification.
491 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
492 draft, changing the syntax and factoring some duplicate code".
494 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
495 for deliveries of the second and subsequent messages over the same SMTP
498 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
499 ${reduce, with only minor "tidies".
501 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
503 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
504 expansion side effects.
506 PH/27 When a message times out after an over-quota error from an Exim-imposed
507 quota, the bounce message says "mailbox is full". This message was not
508 being given when it was a system quota that was exceeded. It now should
511 MH/03 Made $recipients available in local_scan(). local_scan() already has
512 better access to the recipient list through recipients_list[], but
513 $recipients can be useful in postmaster-provided expansion strings.
515 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
516 in the case of a MAIL command with additional options following the
517 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
518 were accidentally chopped off.
520 PH/29 SMTP synchronization checks are implemented when a command is read -
521 there is a check that no more input is waiting when there shouldn't be
522 any. However, for some commands, a delay in an ACL can mean that it is
523 some time before the response is written. In this time, more input might
524 arrive, invalidly. So now there are extra checks after an ACL has run for
525 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
526 pipelining has not been advertised.
528 PH/30 MH's patch to allow iscntrl() characters to be list separators.
530 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
531 returned in the SMTP response when smtp_return_error_details was false.
534 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
535 instead of the C I/O that was originally supplied, because problems were
538 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
539 Exim which did not show up earlier: it was assuming that a call to
540 SSL_CTX_set_info_callback() might give an error value. In fact, there is
541 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
542 was a macro that became an assignment, so it seemed to work. This has
543 changed to a proper function call with a void return, hence the compile
544 error. Exim's code has been fixed.
546 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
549 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
551 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
553 PH/37 If a message is not accepted after it has had an id assigned (e.g.
554 because it turns out to be too big or there is a timeout) there is no
555 "Completed" line in the log. When some messages of this type were
556 selected by exigrep, they were listed as "not completed". Others were
557 picked up by some special patterns. I have improved the selection
558 criteria to be more general.
560 PH/38 The host_find_failed option in the manualroute router can now be set
561 to "ignore", to completely ignore a host whose IP address cannot be
562 found. If all hosts are ignored, the behaviour is controlled by the new
563 host_all_ignored option.
565 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
566 homing or because of multiple MX records with /mx) generated more than
567 one IP address, and the following item turned out to be the local host,
568 all the secondary addresses of the first item were incorrectly removed
569 from the list, along with the local host and any following hosts (which
570 is what is supposed to happen).
572 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
573 whoever called Exim into the -H file. In the case of the daemon it was
574 behaving confusingly. When first started, it used values for whoever
575 started the daemon, but after a SIGHUP it used the Exim user (because it
576 calls itself on a restart). I have changed the code so that it now always
579 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
580 message are rejected with the same error (e.g. no authentication or bad
581 sender address), and a DATA command is nevertheless sent (as can happen
582 with PIPELINING or a stupid MUA), the error message that was given to the
583 RCPT commands is included in the rejection of the DATA command. This is
584 intended to be helpful for MUAs that show only the final error to their
587 PH/42 Another patch from the Sieve maintainer.
589 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
590 Eximstats - Fixed some broken HTML links and added missing column headers
592 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
593 columns for Rejects, Temp Rejects, Ham, and Spam rows.
595 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
597 PH/43 Yet another patch from the Sieve maintainer.
599 PH/44 I found a way to check for a TCP/IP connection going away before sending
600 the response to the final '.' that terminates a message, but only in the
601 case where the client has not sent further data following the '.'
602 (unfortunately, this is allowed). However, in many cases there won't be
603 any further data because there won't be any more messages to send. A call
604 to select() can be used: if it shows that the input is "ready", there is
605 either input waiting, or the socket has been closed. An attempt to read
606 the next input character can distinguish the two cases. Previously, Exim
607 would have sent an OK response which the client would never have see.
608 This could lead to message repetition. This fix should cure that, at
609 least in a lot of common cases.
611 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
612 advertised in response to EHLO.
618 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
619 fixed by 4.65/MH/01 (is this a record?) are fixed:
621 (i) An empty string was always treated as zero by the numeric comparison
622 operators. This behaviour has been restored.
624 (ii) It is documented that the numeric comparison operators always treat
625 their arguments as decimal numbers. This was broken in that numbers
626 starting with 0 were being interpreted as octal.
628 While fixing these problems I realized that there was another issue that
629 hadn't been noticed. Values of message_size_limit (both the global option
630 and the transport option) were treated as octal if they started with 0.
631 The documentation was vague. These values are now always treated as
632 decimal, and I will make that clear in the documentation.
638 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
639 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
642 MH/01 Don't check that the operands of numeric comparison operators are
643 integers when their expansion is in "skipping" mode (fixes bug
644 introduced by 4.64-PH/07).
646 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
647 child addresses, Exim now panics and dies. Previously, because the count
648 is held in a short int, deliveries were likely to be lost. As such a
649 large number of recipients for a single message is ridiculous
650 (performance will be very, very poor), I have chosen to impose a limit
651 rather than extend the field.
657 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
658 leftover -K file (the existence of which was triggered by #402).
659 While we were at it, introduced process PID as part of the -K
660 filename. This should rule out race conditions when creating
663 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
664 processing considerably. Previous code took too long for large mails,
665 triggering a timeout which in turn triggers #401.
667 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
668 in the DK code in transports.c. sendfile() is not really portable,
669 hence the _LINUX specificness.
671 TF/01 In the add_headers option to the mail command in an Exim filter,
672 there was a bug that Exim would claim a syntax error in any
673 header after the first one which had an odd number of characters
676 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
677 callout verification, Exim cached a "reject" for the entire domain. This
678 is correct for most verifications, but it is not correct for a recipient
679 verification with use_sender or use_postmaster set, because in that case
680 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
681 case of MAIL FROM:<> rejection from other early rejections (e.g.
682 rejection of HELO). When verifying a recipient using a non-null MAIL
683 address, the cache is ignored if it shows MAIL FROM:<> rejection.
684 Whatever the result of the callout, the value of the domain cache is
685 left unchanged (for any other kind of callout, getting as far as trying
686 RCPT means that the domain itself is ok).
688 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
691 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
692 manifest itself as EPIPE rather than ECONNECT. When tidying away a
693 session, the daemon ignores ECONNECT errors and logs others; it now
694 ignores EPIPE as well.
696 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
697 (quoted-printable decoding).
699 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
700 later the small subsequent patch to fix an introduced bug.
702 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
704 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
706 PH/08 An error is now given if message_size_limit is specified negative.
708 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
709 to be given (somewhat) arbitrary names.
711 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
714 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
715 miscellaneous code fixes
717 PH/10 Added the log_reject_target ACL modifier to specify where to log
720 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
721 hostname. This is wrong, because it relates to the incoming message (and
722 probably the interface on which it is arriving) and not to the outgoing
723 callout (which could be using a different interface). This has been
724 changed to use the value of the helo_data option from the smtp transport
725 instead - this is what is used when a message is actually being sent. If
726 there is no remote transport (possible with a router that sets up host
727 addresses), $smtp_active_hostname is used.
729 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
730 tweaks were necessary in order to get it to work (see also 21 below):
731 (a) The code assumed that strncpy() returns a negative number on buffer
732 overflow, which isn't the case. Replaced with Exim's string_format()
734 (b) There were several signed/unsigned issues. I just did the minimum
735 hacking in of casts. There is scope for a larger refactoring.
736 (c) The code used strcasecmp() which is not a standard C function.
737 Replaced with Exim's strcmpic() function.
738 (d) The code set only $1; it now sets $auth1 as well.
739 (e) A simple test gave the error "authentication client didn't specify
740 service in request". It would seem that Dovecot has changed its
741 interface. Fortunately there's a specification; I followed it and
742 changed what the client sends and it appears to be working now.
744 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
747 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
748 address A is aliased to B and C, where B exists and C does not. Without
749 -v the output is "A verified" because verification stops after a
750 successful redirection if more than one address is generated. However,
751 with -v the child addresses are also verified. Exim was outputting "A
752 failed to verify" and then showing the successful verification for C,
753 with its parentage. It now outputs "B failed to verify", showing B's
754 parentage before showing the successful verification of C.
756 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
757 look up a TXT record in a specific list after matching in a combined
760 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
761 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
762 they consult the DNS. I had assumed they would set it the way they
763 wanted; and indeed my experiments on Linux seem to show that in some
764 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
765 To be on the safe side, however, I have now made the interface to
766 host_find_byname() similar to host_find_bydns(), with an argument
767 containing the DNS resolver options. The host_find_byname() function now
768 sets these options at its start, just as host_find_bydns() does. The smtp
769 transport options dns_qualify_single and dns_search_parents are passed to
770 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
771 of host_find_byname() use the default settings of RES_DEFNAMES
772 (qualify_single) but not RES_DNSRCH (search_parents).
774 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
775 spool_read_header() do less string testing, by means of a preliminary
776 switch on the second character of optional "-foo" lines. (This is
777 overdue, caused by the large number of possibilities that now exist.
778 Originally there were few.) While I was there, I also converted the
779 str(n)cmp tests so they don't re-test the leading "-" and the first
780 character, in the hope this might squeeze out yet more improvement.
782 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
783 flag allowing group syntax was set by the header_syntax check but not
784 turned off, possible causing trouble later; (2) The flag was not being
785 set at all for the header_verify test, causing "group"-style headers to
786 be rejected. I have now set it in this case, and also caused header_
787 verify to ignore an empty address taken from a group. While doing this, I
788 came across some other cases where the code for allowing group syntax
789 while scanning a header line wasn't quite right (mostly, not resetting
790 the flag correctly in the right place). These bugs could have caused
791 trouble for malformed header lines. I hope it is now all correct.
793 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
794 with the "reply" argument non-NULL. The code, however (which originally
795 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
796 but it didn't always do it. This confused somebody who was copying the
797 code for some other use. I have removed all the tests.
799 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
800 feature that was used to support insecure browsers during the U.S. crypto
801 embargo. It requires special client support, and Exim is probably the
802 only MTA that supported it -- and would never use it because real RSA is
803 always available. This code has been removed, because it had the bad
804 effect of slowing Exim down by computing (never used) parameters for the
805 RSA_EXPORT functionality.
807 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
808 authenticator to fail if there's a tab character in the incoming data
809 (there should never be unless someone is messing about, as it's supposed
810 to be base64-encoded). Also added, on Timo's advice, the "secured" option
811 if the connection is using TLS or if the remote IP is the same as the
812 local IP, and the "valid-client-cert option" if a client certificate has
815 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
816 authenticators. This can be used for authorization after authentication
817 succeeds. (In the case of plaintext, it servers for both authentication
820 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
821 if any retry times were supplied.
823 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
824 connection, where there is no client IP address to check. In this
825 situation, the verify now always succeeds.
827 PH/25 Applied John Jetmore's -Mset patch.
829 PH/26 Added -bem to be like -Mset, but loading a message from a file.
831 PH/27 In a string expansion for a processed (not raw) header when multiple
832 headers of the same name were present, leading whitespace was being
833 removed from all of them, but trailing whitespace was being removed only
834 from the last one. Now trailing whitespace is removed from each header
835 before concatenation. Completely empty headers in a concatenation (as
838 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
839 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
841 PH/29 [Removed. This was a change that I later backed out, and forgot to
842 correct the ChangeLog entry (that I had efficiently created) before
843 committing the later change.]
845 PH/30 Exim was sometimes attempting to deliver messages that had suffered
846 address errors (4xx response to RCPT) over the same connection as other
847 messages routed to the same hosts. Such deliveries are always "forced",
848 so retry times are not inspected. This resulted in far too many retries
849 for the affected addresses. The effect occurred only when there were more
850 hosts than the hosts_max_try setting in the smtp transport when it had
851 the 4xx errors. Those hosts that it had tried were not added to the list
852 of hosts for which the message was waiting, so if all were tried, there
853 was no problem. Two fixes have been applied:
855 (i) If there are any address or message errors in an SMTP delivery, none
856 of the hosts (tried or untried) are now added to the list of hosts
857 for which the message is waiting, so the message should not be a
858 candidate for sending over the same connection that was used for a
859 successful delivery of some other message. This seems entirely
860 reasonable: after all the message is NOT "waiting for some host".
861 This is so "obvious" that I'm not sure why it wasn't done
862 previously. Hope I haven't missed anything, but it can't do any
863 harm, as the worst effect is to miss an optimization.
865 (ii) If, despite (i), such a delivery is accidentally attempted, the
866 routing retry time is respected, so at least it doesn't keep
867 hammering the server.
869 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
870 in ${readsocket because some servers need this prod.
872 PH/32 Added some extra debug output when updating a wait-xxx database.
874 PH/33 The hint "could be header name not terminated by colon", which has been
875 given for certain expansion errors for a long time, was not being given
876 for the ${if def:h_colon_omitted{... case.
878 PH/34 The spec says: "With one important exception, whenever a domain list is
879 being scanned, $domain contains the subject domain." There was at least
880 one case where this was not true.
882 PH/35 The error "getsockname() failed: connection reset by peer" was being
883 written to the panic log as well as the main log, but it isn't really
884 panic-worthy as it just means the connection died rather early on. I have
885 removed the panic log writing for the ECONNRESET error when getsockname()
888 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
889 runs only) independently of the message's sender address. This meant
890 that, if the 4xx error was in fact related to the sender, a different
891 message to the same recipient with a different sender could confuse
892 things. In particualar, this can happen when sending to a greylisting
893 server, but other circumstances could also provoke similar problems.
894 I have changed the default so that the retry time for these errors is now
895 based a combination of the sender and recipient addresses. This change
896 can be overridden by setting address_retry_include_sender=false in the
899 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
900 remote server are returned as part of bounce messages. This was not
901 happening for LMTP over a pipe (the lmtp transport), but now it is the
902 same for both kinds of LMTP.
904 PH/38 Despite being documented as not happening, Exim was rewriting addresses
905 in header lines that were in fact CNAMEs. This is no longer the case.
907 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
908 and queue runs started by the daemon processed all messages. This has
909 been fixed so that -R and -S can now usefully be given with -q<time>.
911 PH/40 Import PCRE release 6.7 (fixes some bugs).
913 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
915 PH/42 Give an error if -q is specified more than once.
917 PH/43 Renamed the variables $interface_address and $interface_port as
918 $received_ip_address and $received_port, to make it clear that these
919 values apply to message reception, and not to the outgoing interface when
920 a message is delivered. (The old names remain recognized, of course.)
922 PH/44 There was no timeout on the connect() call when using a Unix domain
923 socket in the ${readsocket expansion. There now is.
925 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
926 be meaningful with "accept".
928 SC/01 Eximstats V1.43
929 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
931 SC/02 Eximstats V1.44
932 Use a glob alias rather than an array ref in the generated
933 parser. This improves both readability and performance.
935 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
936 Collect SpamAssassin and rejection statistics.
937 Don't display local sender or destination tables unless
938 there is data to show.
939 Added average volumes into the top table text output.
941 SC/04 Eximstats V1.46
942 Collect data on the number of addresses (recipients)
943 as well as the number of messages.
945 SC/05 Eximstats V1.47
946 Added 'Message too big' to the list of mail rejection
947 reasons (thanks to Marco Gaiarin).
949 SC/06 Eximstats V1.48
950 Mainlog lines which have GMT offsets and are too short to
951 have a flag are now skipped.
953 SC/07 Eximstats V1.49 (Alain Williams)
954 Added the -emptyok flag.
956 SC/08 Eximstats V1.50
957 Fixes for obtaining the IP address from reject messages.
959 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
960 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
961 whitesspace changes from 4.64-PH/27
963 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
966 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
967 are found, allow negative numbers in numeric criteria)
969 JJ/06 exipick.20061117.2, added new $message_body_missing variable
971 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
972 to match changes made in 4.64-PH/43
974 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
976 PH/47 Put in an explicit test for a DNS lookup of an address record where the
977 "domain" is actually an IP address, and force a failure. This locks out
978 those revolvers/nameservers that support "A-for-A" lookups, in
979 contravention of the specifications.
981 PH/48 When a host name was looked up from an IP address, and the subsequent
982 forward lookup of the name timed out, the host name was left in
983 $sender_host_name, contrary to the specification.
985 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
986 restricted to single-key lookups, Exim was not diagnosing an error if
987 * or *@ was used with a query-style lookup.
989 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
991 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
992 long ago, but noone interested enough thought of it. Let's just say that
993 the "1.1" means that there are some new functions that weren't there at
994 some point in the past.
996 PH/51 Error processing for expansion failure of helo_data from an smtp
997 transport during callout processing was broken.
999 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1000 tested/used via the -bh/-bhc/-bs options.
1002 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1003 bug, fixed in subsequent PCRE releases).
1005 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1006 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1008 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1014 SC/01 Use a glob alias rather than an array ref in eximstats generated
1015 parser. This improves both readability and performance.
1017 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1018 Don't display local sender or destination tables in eximstats unless
1019 there is data to show.
1020 Added average volumes into the eximstats top table text output.
1022 SC/03 Collect data on the number of addresses (recipients) as well
1023 as the number of messages in eximstats.
1025 TF/01 Correct an error in the documentation for the redirect router. Exim
1026 does (usually) call initgroups() when daemonizing.
1028 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1029 with consistent privilege compared to when running as a daemon.
1031 TF/03 Note in the spec that $authenticated_id is not set for local
1032 submissions from trusted users.
1034 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1035 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1037 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1038 by adding some example configuration directives to the default
1039 configuration file. A little bit of work is required to uncomment the
1040 directives and define how usernames and passwords are checked, but
1041 there is now a framework to start from.
1043 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1044 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1045 without this. I don't know how relevant this is to other LDAP libraries.
1047 PH/02 Add the verb name to the "unknown ACL verb" error.
1049 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1051 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1053 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1054 directory not expanded when it should be if an expanded home directory
1055 was set for the address (which is overridden by the transport).
1057 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1060 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1061 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1062 because it is too late at that time, and has no effect.
1064 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1065 security issue with \' (bugzilla #107). I could not use the
1066 PQescapeStringConn() function, because it needs a PGconn value as one of
1069 PH/08 When testing addresses using -bt, indicate those final addresses that
1070 are duplicates that would not cause an additional delivery. At least one
1071 person was confused, thinking that -bt output corresponded to deliveries.
1072 (Suppressing duplicates isn't a good idea as you lose the information
1073 about possibly different redirections that led to the duplicates.)
1075 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1076 systems where poll() doesn't work, in particular OS X.
1078 PH/10 Added more information to debugging output for retry time not reached.
1080 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1081 operations in malware.c.
1083 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1086 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1087 syslog_duplication set false, log lines that would normally be written
1088 both the the main log and to the reject log were not written to syslog at
1091 PH/14 In the default configuration, change the use of "message" in ACL warn
1092 statements to "add_header".
1094 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1095 not followed by a command (e.g. "seen endif").
1097 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1098 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1101 PH/17 Added extra conditions to the default value of delay_warning_condition
1105 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1106 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1107 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1110 The Auto-Submitted: and various List- headers are standardised, whereas I
1111 don't think Precedence: ever was.
1113 PH/18 Refactored debugging code in route_finduser() to show more information,
1114 in particular, the error code if getpwnam() issues one.
1116 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1117 This is apparently needed in addition to the PH/07 change above to avoid
1118 any possible encoding problems.
1120 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1121 but not after initializing Perl.
1123 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1124 output them only if debugging. By default they are written stderr,
1125 apparently, which is not desirable.
1127 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1130 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1133 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1135 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1136 authenticated or an ident call has been made. Suppress the default
1137 values for $authenticated_id and $authenticated_sender (but permit -oMai
1138 and -oMas) when testing with -bh.
1140 PH/24 Re-jigged the order of the tests in the default configuration so that the
1141 tests for valid domains and recipients precede the DNS black list and CSA
1142 tests, on the grounds that those ones are more expensive.
1144 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1145 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1146 This bug exists in every version of Exim that I still have, right back to
1149 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1150 However, an attempt to turn on case-sensitivity in a regex key by
1151 including (?-i) didn't work because the subject string was already
1152 lowercased, and the effects were non-intuitive. It turns out that a
1153 one-line patch can be used to allow (?-i) to work as expected.
1159 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1160 other effects) broke the use of negated acl sub-conditions.
1162 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1165 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1166 "Deny" causes Exim to reject the incoming connection with a 554 error.
1167 Unfortunately, if there is a major crisis, such as a disk failure,
1168 tcp-wrappers gives "deny", whereas what one would like would be some
1169 kind of temporary error. A kludge has been added to help with this.
1170 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1171 554 error is used if errno is still zero or contains ENOENT (which occurs
1172 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1175 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1177 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1178 errors. Otherwise a message that provokes a temporary error (when other
1179 messages do not) can cause a whole host to time out.
1181 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1182 addresses were routed directly to files or pipes from a redirect router.
1183 File deliveries just didn't batch; pipe deliveries might have suffered
1186 PH/06 A failure to get a lock for a hints database would erroneously always say
1187 "Failed to get write lock", even when it was really a read lock.
1189 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1190 of 0600. This has been changed to use the value of the lockfile_mode
1191 option (which defaults to 0600).
1193 PH/08 Applied small patch from the Sieve maintainer.
1195 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1196 folder from quota calculations, a direct delivery into this folder messed
1197 up the contents of the maildirsize file. This was because the regex was
1198 used only to exclude .Trash (or whatever) when the size of the mailbox
1199 was calculated. There was no check that a delivery was happening into an
1200 excluded directory. This bug has been fixed by ignoring all quota
1201 processing for deliveries into excluded directories.
1203 PH/10 Added the maildirfolder_create_regex option to appendfile.
1209 PH/01 The code for finding all the local interface addresses on a FreeBSD
1210 system running IPv6 was broken. This may well have applied to all BSD
1211 systems, as well as to others that have similar system calls. The broken
1212 code found IPv4 interfaces correctly, but gave incorrect values for the
1213 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1214 that it would not match correctly against @[] and not recognize the IPv6
1217 PH/02 The ipliteral router was not recognizing addresses of the form user@
1218 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1220 PH/03 Added disable_ipv6.
1222 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1223 decoded form, because it is most often used to construct To: headers
1224 lines in autoreplies, and the decoded form may well be syntactically
1225 invalid. However, $reply_address has leading white space removed, and all
1226 newlines turned into spaces so that the autoreply transport does not
1229 PH/05 If group was specified without a user on a router, and no group or user
1230 was specified on a transport, the group from the router was ignored.
1232 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1233 for visible compile-time settings that can be used to change these
1234 numbers, for those that want even more. Backwards compatibility with old
1235 spool files has been maintained. However, going back to a previous Exim
1236 release will lost any variables that are in spool files.
1238 PH/07 Two small changes when running in the test harness: increase delay when
1239 passing a TCP/IP connection to a new process, in case the original
1240 process has to generate a bounce, and remove special handling of
1241 127.0.0.2 (sic), which is no longer necessary.
1243 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1244 be the same on different OS.
1246 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1249 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1250 whether --show-vars was specified or not
1252 JJ/02 exipick: Added support for new ACL variable spool format introduced
1255 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1256 syntactically invalid From: or Reply-to: line, and a filter used this to
1257 generate an autoreply, and therefore failed to obtain an address for the
1258 autoreply, Exim could try to deliver to a non-existent relative file
1259 name, causing unrelated and misleading errors. What now happens is that
1260 it logs this as a hard delivery error, but does not attempt to create a
1263 PH/11 The exinext utility has a -C option for testing purposes, but although
1264 the given file was scanned by exinext itself; it wasn't being passed on
1265 when Exim was called.
1267 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1268 an end-of-file indication when reading a command response.
1270 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1271 compiled. In many other places in Exim, IPv6 addresses are always
1272 recognized, so I have changed this. It also means that IPv4 domain
1273 literals of the form [IPV4:n.n.n.n] are now always recognized.
1275 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1276 used if the router is not running as root, for example, when verifying at
1277 ACL time, or when using -bh. The debugging output from this situation was
1278 non-existent - all you got was a failure to exec. I have made two
1281 (a) Failures to set uid/gid, the current directory, or a process leader
1282 in a subprocess such as that created by queryprogram now generate
1283 suitable debugging ouput when -d is set.
1285 (b) The queryprogram router detects when it is not running as root,
1286 outputs suitable debugging information if -d is set, and then runs
1287 the subprocess without attempting to change uid/gid.
1289 PH/15 Minor change to Makefile for building test_host (undocumented testing
1292 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1293 additional section of a DNS packet that returns MX or SRV records.
1294 Instead, it always explicitly searches for A/AAAA records. This avoids
1295 major problems that occur when a DNS server includes only records of one
1296 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1297 fixed another bug: if SRV records were looked up and the corresponding
1298 address records were *not* found in the additional section, the port
1299 values from the SRV records were lost.
1301 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1302 using the correct key (the original address) when searching the retry
1303 rules in order to find which one to use for generating the retry hint.
1305 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1306 adding the default one. Similarly, if it contains a Reply-To: header, the
1307 errors_reply_to option, if set, is not used.
1309 PH/19 When calculating a retry time, Exim used to measure the "time since
1310 failure" by looking at the "first failed" field in the retry record. Now
1311 it does not use this if it is later than than the arrival time of the
1312 message. Instead it uses the arrival time. This makes for better
1313 behaviour in cases where some deliveries succeed, thus re-setting the
1314 "first failed" field. An example is a quota failure for a huge message
1315 when small messages continue to be delivered. Without this change, the
1316 "time since failure" will always be short, possible causing more frequent
1317 delivery attempts for the huge message than are intended.
1318 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1320 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1321 $1, $2, $3) because the numerical variables can be reset during some
1322 expansion items (e.g. "match"), thereby losing the authentication data.
1324 PH/21 Make -bV show the size of off_t variables so that the test suite can
1325 decide whether to run tests for quotas > 2G.
1327 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1328 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1329 filecount value is greater than 2G or if a quota value is greater than 2G
1330 on a system where the size of off_t is not greater than 4, a panic error
1333 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1334 never match. The debug and -bh output now contains an explicit error
1335 message indicating a malformed IPv4 address or mask.
1337 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1338 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1339 PH/23 above applies.
1341 PH/25 Do not write to syslog when running in the test harness. The only
1342 occasion when this arises is a failure to open the main or panic logs
1343 (for which there is an explicit test).
1345 PH/26 Added the /no_tell option to "control=freeze".
1347 PH/27 If a host name lookup failed very early in a connection, for example, if
1348 the IP address matched host_lookup and the reverse lookup yielded a name
1349 that did not have a forward lookup, an error message of the form "no IP
1350 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1351 could be logged. Now it outputs the IP address instead of "NULL".
1353 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1354 allows the sender and the authenticated sender to be set when
1355 submitting a message from within Exim. Since child_open_exim() is
1356 documented for local_scan(), the new function should be too.
1358 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1359 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1360 results in an empty string is now treated as unset.
1362 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1364 PH/31 Added sender_verify_fail logging option.
1366 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1367 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1368 tidied the source and removed it altogether.
1370 PH/33 When a queue run was abandoned because the load average was too high, a
1371 log line was always written; now it is written only if the queue_run log
1372 selector is set. In addition, the log line for abandonment now contains
1373 information about the queue run such as the pid. This is always present
1374 in "start" and "stop" lines but was omitted from the "abandon" line.
1376 PH/34 Omit spaces between a header name and the colon in the error message that
1377 is given when verify = headers_syntax fails (if there are lots of them,
1378 the message gets confusing).
1380 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1381 names, as there are now some PTR records that contain slashes. This check
1382 is only to protect against broken name servers that fall over on strange
1383 characters, so the fact that it applies to all lookups doesn't matter.
1385 PH/36 Now that the new test suite is complete, we can remove some of the
1386 special code in Exim that was needed for the old test suite. For example,
1387 sorting DNS records because real resolvers return them in an arbitrary
1388 order. The new test suite's fake resolver always returns records in the
1391 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1392 bounces) except when queue_only is set, to avoid logging races between
1393 the different processes.
1395 PH/38 Panic-die if .include specifies a non-absolute path.
1397 PH/39 A tweak to the "H" retry rule from its user.
1399 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1400 a label. They prevented compilation on older perls.
1402 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1403 a warning to be raised on newish perls.
1405 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1406 on queue. Changes to match documented behaviour of showing count of
1407 messages matching specified criteria.
1409 PH/40 Changed the default ident timeout from 30s to 5s.
1411 PH/41 Added support for the use of login_cap features, on those BSD systems
1412 that have them, for controlling the resources used by pipe deliveries.
1414 PH/42 The content-scanning code uses fopen() to create files in which to put
1415 message data. Previously it was not paying any attention to the mode of
1416 the files. Exim runs with umask(0) because the rest of the code creates
1417 files with open(), and sets the required mode explicitly. Thus, these
1418 files were ending up world-writeable. This was not a big issue, because,
1419 being within the spool directory, they were not world-accessible. I have
1420 created a function called modefopen, which takes an additional mode
1421 argument. It sets umask(777), creates the file, chmods it to the required
1422 mode, then resets the umask. All the relevant calls to fopen() in the
1423 content scanning code have been changed to use this function.
1425 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1426 to 24 hours. This avoids potential overflow problems when processing G
1427 and H retry rules. I suspect nobody ever tinkers with this value.
1429 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1431 PH/45 When the plaintext authenticator is running as a client, the server's
1432 challenges are checked to ensure they are valid base64 strings. By
1433 default, the authentication attempt is cancelled if an invalid string is
1434 received. Setting client_ignore_invalid_base64 true ignores these errors.
1435 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1436 they are received. Thus, the responses can be made to depend on the
1437 challenges. If an invalid string is ignored, an empty string is placed in
1440 PH/46 Messages that are created by the autoreply transport now contains a
1441 References: header, in accordance with RFCs 2822 and 3834.
1443 PH/47 Added authenticated_sender_force to the smtp transport.
1445 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1447 PH/49 Installed latest patch from the Sieve maintainer.
1449 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1450 was also set, the appendfile transport was unnecessarily scanning a
1451 directory of message files (e.g. for maildir delivery) to find the count
1452 of files (along with the size), even though it did not need this
1453 information. It now does the scan only if it needs to find either the
1454 size of the count of files.
1456 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1458 PH/52 Two bugs concerned with error handling when the smtp transport is
1461 (i) Exim was not creating retry information for temporary errors given
1462 for individual recipients after the DATA command when the smtp transport
1463 was used in LMTP mode. This meant that they could be retried too
1464 frequently, and not timed out correctly.
1466 (ii) Exim was setting the flag that allows error details to be returned
1467 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1468 recipients that were returned after the DATA command.
1470 PH/53 This is related to PH/52, but is more general: for any failing address,
1471 when detailed error information was permitted to be returned to the
1472 sender, but the error was temporary, then after the final timeout, only
1473 "retry timeout exceeded" was returned. Now it returns the full error as
1474 well as "retry timeout exceeded".
1476 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1477 do this, and (what is worse) MTAs that accept it.
1479 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1480 will now be deprecated.
1482 PH/56 New os.c-cygwin from the Cygwin maintainer.
1484 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1485 formats (previously only available in exim formats via -bpr, -bpru,
1486 and -bpra. Now also available in native and exiqgrep formats)
1488 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1489 with very large, slow to parse queues
1491 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1493 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1495 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1496 responses to authentication challenges, though it was showing the
1497 challenges; (ii) I've removed the CR characters from the debug output for
1500 PH/58 Allow for the insertion of a newline as well as a space when a string
1501 is turned into more than one encoded-word during RFC 2047 encoding. The
1502 Sieve code now uses this.
1504 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1505 data_4xx, lost_connection, tls_required.
1507 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1508 message was being sent as an SMTP response.
1510 PH/61 Add -l and -k options to exicyclog.
1512 PH/62 When verifying, if an address was redirected to one new address, so that
1513 verification continued, and the new address failed or deferred after
1514 having set something in $address_data, the value of $address_data was not
1515 passed back to the ACL. This was different to the case when no
1516 redirection occurred. The value is now passed back in both cases.
1518 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1519 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1520 use login_cap.h, so on its own it isn't the distinguishing feature. The
1521 new name refers directly to the setclassresources() function.
1523 PH/65 Added configuration files for NetBSD3.
1525 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1527 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1528 is preferred over IPv4.
1530 PH/68 The bounce_return_message and bounce_return_body options were not being
1531 honoured for bounces generated during the reception of non-SMTP messages.
1532 In particular, this applied to messages rejected by the ACL. This bug has
1533 been fixed. However, if bounce_return_message is true and bounce_return_
1534 body is false, the headers that are returned for a non-SMTP message
1535 include only those that have been read before the error was detected.
1536 (In the case of an ACL rejection, they have all been read.)
1538 PH/69 The HTML version of the specification is now built in a directory called
1539 spec_html instead of spec.html, because the latter looks like a path with
1540 a MIME-type, and this confuses some software.
1542 PH/70 Catch two compiler warnings in sieve.c.
1544 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1545 function verify_get_ident() calls ip_connect() to connect a socket, but
1546 if the "connect()" function timed out, ip_connect() used to close the
1547 socket. However, verify_get_ident() also closes the socket later, and in
1548 between Exim writes to the log, which may get opened at this point. When
1549 the socket was closed in ip_connect(), the log could get the same file
1550 descriptor number as the socket. This naturally causes chaos. The fix is
1551 not to close the socket in ip_connect(); the socket should be closed by
1552 the function that creates it. There was only one place in the code where
1553 this was missing, in the iplookup router, which I don't think anybody now
1554 uses, but I've fixed it anyway.
1556 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1557 well as to direct DNS lookups. Otherwise the handling of names in host
1558 lists is inconsistent and therefore confusing.
1564 PH/01 Two changes to the default runtime configuration:
1566 (1) Move the checks for relay_from_hosts and authenticated clients from
1567 after to before the (commented out) DNS black list checks.
1569 (2) Add control=submission to the relay_from_hosts and authenticated
1570 clients checks, on the grounds that messages accepted by these
1571 statements are most likely to be submissions.
1573 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1575 (1) Generate an error if the third argument for the ${prvs expansion is
1578 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1581 (3) Reset the variables that are obtained from the first argument of
1582 ${prvscheck and used in the second argument before leaving the code,
1583 because their memory is reclaimed, so using them afterwards may do
1586 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1587 one (it's much easier than Tom thought :-).
1589 (5) Because of (4), we can now allow for the use of $prvscheck_result
1590 inside the third argument.
1592 PH/03 For some reason, the default setting of PATH when running a command from
1593 a pipe transport was just "/usr/bin". I have changed it to
1596 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1597 anything to be listed in the output from -bV.
1599 PH/05 When a filter generated an autoreply, the entire To: header line was
1600 quoted in the delivery log line, like this:
1602 => >A.N.Other <ano@some.domain> <original@ddress> ...
1604 This has been changed so that it extracts the operative address. There
1605 may be more than one such address. If so, they are comma-separated, like
1608 => >ano@some.domain,ona@other.domain <original@ddress> ...
1610 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1611 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1612 not being looked up in the rDNS to get a host name, Exim was showing the
1613 IP address twice in Received: lines, even though the IP addresses were
1614 identical. For example:
1616 Received: from [1.2.3.4] (helo=[1.2.3.4])
1618 However, if the real host name was known, it was omitting the HELO data
1619 if it matched the actual IP address. This has been tidied up so that it
1620 doesn't show the same IP address twice.
1622 PH/07 When both +timestamp and +memory debugging was on, the value given by
1623 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1624 called by the debug printing, thereby overwriting the timestamp buffer.
1625 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1627 PH/08 When the original message was included in an autoreply transport, it
1628 always said "this is a copy of the message, including all the headers",
1629 even if body_only or headers_only was set. It now gives an appropriate
1632 PH/09 Applied a patch from the Sieve maintainer which:
1634 o fixes some comments
1635 o adds the (disabled) notify extension core
1636 o adds some debug output for the result of if/elsif tests
1637 o points to the current vacation draft in the documentation
1638 and documents the missing references header update
1642 o fixes a bug in processing the envelope test (when testing
1643 multiple envelope elements, the last element determinted the
1646 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1647 Electronic Mail") by including:
1649 Auto-submitted: auto-generated
1651 in the messages that it generates (bounce messages and others, such as
1652 warnings). In the case of bounce messages for non-SMTP mesages, there was
1653 also a typo: it was using "Auto_submitted" (underscore instead of
1654 hyphen). Since every message generated by Exim is necessarily in response
1655 to another message, thes have all been changed to:
1657 Auto-Submitted: auto-replied
1659 in accordance with these statements in the RFC:
1661 The auto-replied keyword:
1663 - SHOULD be used on messages sent in direct response to another
1664 message by an automatic process,
1666 - MUST NOT be used on manually-generated messages,
1668 - MAY be used on Delivery Status Notifications (DSNs) and Message
1669 Disposition Notifications (MDNs),
1671 - MUST NOT be used on messages generated by automatic or periodic
1672 processes, except for messages which are automatic responses to
1675 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1676 to the default Received: header definition.
1678 PH/12 Added log selector acl_warn_skipped (default on).
1680 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1681 variables because (a) they are in the wrong storage pool and (b) even if
1682 they were copied, it wouldn't work properly because of the caching.
1684 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1685 checking when decoding. Apparently there are clients that generate
1686 overlong encoded strings. Why am I not surprised?
1688 PH/15 If the first argument of "${if match_address" was not empty, but did not
1689 contain an "@" character, Exim crashed. Now it writes a panic log message
1690 and treats the condition as false.
1692 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1694 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1695 extension "envelope-auth". The code is finished and in agreement with
1696 other implementations, but there is no documentation so far and in fact,
1697 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1698 not changing the active code.
1700 Print executed "if" and "elsif" statements when debugging is used. This
1701 helps a great deal to understand what a filter does.
1703 Document more things not specified clearly in RFC3028. I had all this
1704 sorted out, when out of a sudden new issues came to my mind. Oops."
1706 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1709 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1710 canonical form (as documented). However, after a host name lookup from
1711 the IP address, check_host() was doing a simple string comparison with
1712 addresses acquired from the DNS when checking that the found name did
1713 have the original IP as one of its addresses. Since any found IPv6
1714 addresses are likely to be in abbreviated form, the comparison could
1715 fail. Luckily, there already exists a function for doing the comparison
1716 by converting both addresses to binary, so now that is used instead of
1717 the text comparison.
1719 PH/20 There was another similar case to PH/19, when a complete host name was
1720 given in a host list; looking up its IP address could give an abbreviated
1721 form, whereas the current host's name might or might not be abbreviated.
1722 The same fix has been applied.
1728 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1729 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1732 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1733 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1735 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1737 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1738 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1739 Also, for "Auto-Submitted", treat anything other than "no" as
1740 non-personal, in accordance with RFC 3834. (Previously it treated
1741 anything starting "auto-" as non-personal.)
1743 TF/01 The control=submission/name=... option had a problem with syntax
1744 errors if the name included a slash character. The /name= option
1745 now slurps the rest of the string, so it can include any characters
1746 but it must come last in the list of options (after /sender_retain
1749 PH/05 Some modifications to the interface to the fake nameserver for the new
1757 TK/01 Added the "success_on_redirect" address verification option. See
1758 NewStuff for rationale and an example.
1760 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1762 PH/02 Patch to exigrep to allow it to work on syslog lines.
1764 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1765 fread() to skip over the body file's header line, because in Cygwin the
1766 header line is locked and is inaccessible.
1768 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1769 co-exist for some time) to make it clear that it is the Exim ID that is
1770 referenced, not the Message-ID: header line.
1772 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1773 string_format() function, because snprintf() does not exist on all
1776 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1777 ${stat: expansion item.
1779 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1780 protocol synchronization error", to keep the pedants happy.
1782 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1783 well as for IRIX systems, when gcc is being used. See the host.c source
1786 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1788 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1791 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1792 transport and to the smtp transport in LMTP mode.
1794 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1796 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1797 run a filter in a subprocess. This could lead to confusion in subsequent
1798 lookups in the parent process. There should also be a search_tidyup() at
1799 the end of the subprocess.
1801 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1802 only if the host matched helo_try_verify_hosts, which caused the
1803 verification to occur when the EHLO/HELO command was issued. The ACL just
1804 tested the remembered result. Now, if a previous verification attempt has
1805 not happened, "verify = helo" does it there and then.
1807 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1809 TK/03 Fix log output including CR from clamd.
1811 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1812 exist provoked a memory error which could cause a segfault.
1814 PH/15 Installed PCRE 6.2
1816 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1818 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1819 of the problem. Specifically, suggested +O2 rather than +O1 for the
1822 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1824 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1825 record, the port was not correctly logged when the outgoing_port log
1826 selector was set (it logged the transort's default port).
1828 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1829 fallback_hosts, and "hosts" in the smtp transport.
1831 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1832 host errors such as "Connection refused".
1834 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1835 authentication with radiusclient 0.4.9:
1837 - Error returned from rc_read_config was caught wrongly
1838 - Username/password not passed on to radius server due to wrong length.
1840 The presumption is that some radiusclient API changes for 4.51/PH/17
1841 were not taken care of correctly. The code is still untested by me (my
1842 Linux distribution still has 0.3.2 of radiusclient), but it was
1843 contributed by a Radius user.
1845 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1846 expanding the "port" option of the smtp transport.
1848 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1849 while reading a MIME header. Thanks to Tom Hughes for a patch.
1851 PH/24 Include config.h inside local_scan.h so that configuration settings are
1854 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1855 that in an ACL for RCPT (for example), you can examine exactly what was
1858 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1859 commands, but it was not correctly comparing the address with the actual
1860 client host address. Thus, it would show the EHLO address in Received:
1861 header lines when this was not necessary.
1863 PH/27 Added the % operator to ${eval:}.
1865 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1866 it should be ignoring failures (because with -C, for example, it has lost
1867 privilege). It wasn't ignoring creation failures other than "already
1870 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1873 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1874 because an input line was too long, either on its own, or by virtue of
1875 too many continuations, the temporary file was not being removed, and the
1876 return code was incorrect.
1878 PH/31 Missing "BOOL" in function definition in filtertest.c.
1880 PH/32 Applied Sieve patches from the maintainer.
1882 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1884 PH/33 Added "verify = not_blind".
1886 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1887 Local/Makefile (with some defaults set). These are used in built scripts
1888 such as exicyclog, but they have never been used in the exim_install
1889 script (though there are many overriding facilities there). I have
1890 arranged that the exim_install script now takes note of these two
1893 PH/35 Installed configuration files for Dragonfly.
1895 PH/36 When a locally submitted message by a trusted user did not contain a
1896 From: header, and the sender address was obtained from -f or from an SMTP
1897 MAIL command, and the trusted user did not use -F to supply a sender
1898 name, $originator_name was incorrectly used when constructing a From:
1899 header. Furthermore, $originator_name was used for submission mode
1900 messages from external hosts without From: headers in a similar way,
1901 which is clearly wrong.
1903 PH/37 Added control=suppress_local_fixups.
1905 PH/38 When log_selector = +received_sender was set, and the addition of the
1906 sender made the log line's construction buffer exactly full, or one byte
1907 less than full, an overflow happened when the terminating "\n" was
1910 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1911 when the result of a list match is failure because a DNS lookup failed.
1913 PH/40 RM_COMMAND is now used in the building process.
1915 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1916 the "build-* directories that it finds.
1918 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1919 address in a domain literal was a prefix of an interface address.
1921 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1922 when verifying a sender address, unless rewrite_headers is false.
1924 PH/44 Wrote a long comment about why errors_to addresses are verified as
1925 recipients, not senders.
1927 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1928 the ratelimit ACL was added.
1930 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1932 PH/46 Added extra information about PostgreSQL errors to the error string.
1934 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1935 avoiding the need to install special zones in a real server. This is
1936 backwards compatible; if it can't find the fake resolver, it drops back.
1937 Thus, both old and new test suites can be run.
1939 TF/02 Added util/ratelimit.pl
1941 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1942 clock is set back in time.
1944 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1945 Candler <B.Candler@pobox.com>.
1947 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1948 OK for addresses that are the result of redirections.
1950 PH/48 A number of further additions for the benefit of the new test suite,
1951 including a fake gethostbyname() that interfaces to the fake DNS resolver
1954 TF/06 The fix for widen_domains has also been applied to qualify_single and
1955 search_parents which are the other dnslookup options that can cause
1958 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1961 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1963 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1964 service" if it encountered an MX record with an empty target hostname.
1965 The message is now "an MX or SRV record indicated no SMTP service".
1967 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1968 if the DNS of the sending site is misconfigured. This is quite a
1969 common situation. This change restores the behaviour of treating a
1970 helo verification defer as a failure.
1972 PH/51 If self=fail was set on a router, the bounce message did not include the
1973 actual error message.
1979 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1981 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1982 command itself ended in error, the underlying message about the transport
1983 filter timeout was being overwritten with the pipe command error. Now the
1984 underlying error message should be appended to the second error message.
1986 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1988 PH/02 Reduce the amount of output that "make" produces by default. Full output
1989 can still be requested.
1991 PH/03 The warning log line about a condition test deferring for a "warn" verb
1992 was being output only once per connection, rather than after each
1993 occurrence (because it was using the same function as for successful
1994 "warn" verbs). This seems wrong, so I have changed it.
1996 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1997 it should not have, which might have caused a crash in the right
1998 circumstances, but probably never did.
2000 PH/04 Installed a modified version of Tony Finch's patch to make submission
2001 mode fix the return path as well as the Sender: header line, and to
2002 add a /name= option so that you can make the user's friendly name appear
2005 TF/03 Added the control = fakedefer ACL modifier.
2007 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2008 Mark Lowes for thorough testing.
2010 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2012 TK/03 Merged latest SRS patch from Miles Wilton.
2014 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2015 with the definition in sysexits.h (which is #included earlier).
2016 Fortunately, Exim does not actually use EX_OK. The code used to try to
2017 preserve the sysexits.h value, by assumimg that macro definitions were
2018 scanned for macro replacements. I have been disabused of this notion,
2019 so now the code just undefines EX_OK before #including unistd.h.
2021 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2022 in the smtp transport. When a block could not be written in a single
2023 write() function, the timeout was being re-applied to each part-write.
2024 This seems wrong - if the receiver was accepting one byte at a time it
2025 would take for ever. The timeout is now adjusted when this happens. It
2026 doesn't have to be particularly precise.
2028 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2029 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2031 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2032 without a domain if the check to <postmaster@domain> fails.
2034 SC/01 Eximstats: added -xls and the ability to specify output files
2035 (patch written by Frank Heydlauf).
2037 SC/02 Eximstats: use FileHandles for outputing results.
2039 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2041 SC/04 Eximstats: fixed display of large numbers with -nvr option
2043 SC/05 Eximstats: fixed merging of reports with empty tables.
2045 SC/06 Eximstats: added the -include_original_destination flag
2047 SC/07 Eximstats: removed tabs and trailing whitespace.
2049 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2051 TK/06 MBOX spool code: Add real "From " MBOX separator line
2052 so the .eml file is really in mbox format (even though
2053 most programs do not really care). Patch from Alex Miller.
2055 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2056 The latter is generated from $received_to and is only set if the
2057 message has one envelope recipient. SA can use these headers,
2058 obviously out-of-the-box. Patch from Alex Miller.
2060 PH/08 The ${def test on a variable was returning false if the variable's
2061 value was "0", contrary to what the specification has always said!
2062 The result should be true unless the variable is empty.
2064 PH/09 The syntax error of a character other than { following "${if
2065 def:variable_name" (after optional whitespace) was not being diagnosed.
2066 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2067 accidental colon was present, for example, could give incorrect results.
2069 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2070 result is used (not including appendfile, where other changes are about
2073 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2074 This involved changing a lot of size variables from int to off_t. It
2075 should work with maildirs and everything.
2077 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2078 spamd dying while we are connected to it.
2080 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2083 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2084 function for BDB 4.3.
2086 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2088 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2089 the sources for PCRE have been re-arranged and more files are now
2092 PH/15 The code I had for printing potentially long long variables in PH/11
2093 above was not the best (it lost precision). The length of off_t variables
2094 is now inspected at build time, and an appropriate printing format (%ld
2095 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2096 to be "long long int" or "long int". This is needed for the internal
2097 formatting function string_vformat().
2099 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2100 the configuration file to be ":syslog", then the script "guesses" where
2101 the logs files are, rather than using the compiled in default. In our
2102 case the guess is not the same as the compiled default, so the script
2103 suddenly stopped working when I started to use syslog. The patch checks
2104 to see if log_file_path is "". If so, it attempts to read it from exim
2105 with no configuration file to get the compiled in version, before it
2106 falls back to the previous guessing code."
2108 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2109 implementing BATV in an Exim configuration. See NewStuff for the gory
2112 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2113 Makefile that are specific to HP-UX.
2115 PH/18 If the "use_postmaster" option was set for a recipient callout together
2116 with the "random" option, the postmaster address was used as the MAIL
2117 FROM address for the random test, but not for the subsequent recipient
2118 test. It is now used for both.
2120 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2121 patch removes a few documentation additions to RFC 3028, because the
2122 latest draft now contains them. It adds the new en;ascii-case comparator
2123 and a new error check for 8bit text in MIME parts. Comparator and
2124 require names are now matched exactly. I enabled the subaddress
2125 extension, but it is not well tested yet (read: it works for me)."
2127 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2128 rework some of the code of TK/09 above to avoid the hardwired use of
2129 "%lld" and "long long". Replaced the call to snprintf() with a call to
2132 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2133 records point to non-existent hosts", "retry timeout exceeded", and
2134 "retry time not reached for any host after a long failure period".
2136 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2137 experimental DomainKeys support:
2139 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2140 (2) On an error such as an illegally used "control", the wrong name for
2141 the control was given.
2143 These problems did NOT occur unless DomainKeys support was compiled.
2145 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2147 PH/24 Added ${if match_ip condition.
2149 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2150 databases so that it will be absolutely obvious if a crash occurs in the
2151 DB library. This is a regular occurrence (often caused by mis-matched
2154 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2155 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2156 picked up on a user's system that detects such things. There doesn't seem
2157 to be a gcc warning option for this - only an attribute that has to be
2158 put on the function's prototype. It seems that in Fedora Core 4 they have
2159 set this on a number of new functions. No doubt there will be more in due
2162 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2163 specify a transport. However, if an address that was verified by such a
2164 router was the subject of a callout, Exim crashed because it tried to
2165 read the rcpt_include_affixes from the non-existent transport. Now it
2166 just assumes that the setting of that option is false. This bug was
2167 introduced by 4.51/PH/31.
2169 PH/28 Changed -d+all to exclude +memory, because that information is very
2170 rarely of interest, but it makes the output a lot bigger. People tend to
2171 do -d+all out of habit.
2173 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2174 code in os-type was giving problems when libc.so lives in lib64, like on
2177 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2178 aren't the modern standard, and it seems that some systems' include files
2179 don't always have them. Exim was already checking for some of the newer
2180 ones like T_AAAA, and defining it itself. I've added checks for all the
2181 record types that Exim uses.
2183 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2184 not automatically generating a new one, as it is supposed to. This
2185 prevented TLS from working. If the file did exist, but contained invalid
2186 data, a new version was generated, as expected. It was only the case of a
2187 non-existent file that was broken.
2189 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2190 with a change in libdomainkeys > 0.64.
2192 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2193 from DNS. If the selector record carries the flag, it now has
2194 precedence over the domain-wide flag.
2196 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2198 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2199 the use of a port name that isn't defined in /etc/services) occurred, the
2200 message was deferred as in a normal delivery, and thus remained on the
2201 spool, instead of being failed because of the mua_wrapper setting. This
2202 is now fixed, and I tidied up some of the mua_wrapper messages at the
2205 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2206 the messages in a hash of arrays rather than using individual hashes.
2207 This is a bit cleaner and results in dramatic memory savings, albeit
2208 at a slight CPU cost.
2210 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2211 as requested by Marc Sherman.
2213 SC/10 Eximstats: added histograms for user specified patterns as requested
2216 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2218 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2219 fopen() in the content-scanning modules that did not already have it.
2225 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2226 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2228 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2230 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2232 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2233 to test Sieve filters that use "vacation".
2235 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2236 that changes the way the GnuTLS parameters are stored in the cache file.
2237 The new format can be generated externally. For backward compatibility,
2238 if the data in the cache doesn't make sense, Exim assumes it has read an
2239 old-format file, and it generates new data and writes a new file. This
2240 means that you can't go back to an older release without removing the
2243 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2244 work if there are any delivery delays because "one_time" forces the
2245 parent to be marked "delivered", so its unseen clone is never tried
2246 again. For this reason, Exim now forbids the simultaneous setting of
2249 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2250 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2251 entry if you want to know the details. The fix, however, neglected to
2252 consider the case when local delivery batching is involved. The test for
2253 "previously delivered" was not happening when checking to see if an
2254 address could be batched with a previous (undelivered) one; under
2255 certain circumstances this could lead to multiple deliveries to the same
2258 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2259 in its include files, and this causes problems building Exim.
2261 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2262 header_syntax) but Exim was just ignoring anything given after a slash.
2263 In particular, this caused confusion with an attempt to use "verify =
2264 reverse_host_lookup/defer_ok". An error is now given when options are
2265 supplied for verify items that do not have them. (Maybe reverse_host_
2266 lookup should have a defer_ok option, but that's a different point.)
2268 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2269 defined by RFC 821) to 2048, because there were problems with some AUTH
2270 commands, and RFC 1869 says the size should be increased for extended
2271 SMTP commands that take arguments.
2273 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2276 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2277 "unknown" error; now it says that the functionality isn't in the binary.
2279 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2280 an address' error message when a string expansion fails (syntax or
2281 whatever). Otherwise the password may appear in the log. Following change
2282 PH/42 below, there is no longer a chance of it appearing in a bounce
2285 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2287 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2288 of its addresses was ever tried. (Bugzilla bug #2.)
2290 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2291 the result incorrectly in the debug output. (It correctly added a newline
2292 to what was transported.)
2294 TF/01 Added $received_time.
2296 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2297 commented out examples of how to interface to a virus scanner and to
2298 SpamAssassin. Also added commented examples of av_scanner and
2299 spamd_address settings.
2301 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2302 and controls are allowed in which ACLs. There were a couple of minor
2303 errors. Some of the entries in the conditions table (which is a table of
2304 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2305 negation of where the condition IS allowed.
2307 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2309 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2310 header file does not have a version number, so I've had to invent a new
2311 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2312 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2313 radiusclient), but it was contributed by a Radius user.
2315 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2316 files or directories, for OpenSSL.
2318 PH/19 When an Exim process that is running as root has to create an Exim log
2319 file, it does so in a subprocess that runs as exim:exim so as to get the
2320 ownership right at creation (otherwise, other Exim processes might see
2321 the file with the wrong ownership). There was no test for failure of this
2322 fork() call, which would lead to the process getting stuck as it waited
2323 for a non-existent subprocess. Forks do occasionally fail when resources
2324 run out. I reviewed all the other calls to fork(); they all seem to check
2327 PH/20 When checking for unexpected SMTP input at connect time (before writing
2328 the banner), Exim was not dealing correctly with a non-positive return
2329 from the read() function. If the client had disconnected by this time,
2330 the result was a log entry for a synchronization error with an empty
2331 string after "input=" when read() returned zero. If read() returned -1
2332 (an event I could not check), uninitialized data bytes were printed.
2333 There were reports of junk text (parts of files, etc) appearing after
2336 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2338 PH/22 Added support for macro redefinition, and (re)definition in between
2339 driver and ACL definitions.
2341 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2342 forgetting to use the resulting value; it was using the unexpanded value.
2344 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2345 hadn't been configured. The fix is from Juergen Kreileder, who
2346 understands it better than I do:
2348 "Here's what I see happening with three configured cyrus_sasl
2349 authenticators configured (plain, login, cram-md5):
2351 On startup auth_cyrus_sasl_init() gets called for each of these.
2352 This means three calls to sasl_listmech() without a specified mech_list.
2353 => SASL tests which mechs of all available mechs actually work
2354 => three warnings about OTP not working
2355 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2357 With the patch, sasl_listmech() also gets called three times. But now
2358 SASL's mech_list option is set to the server_mech specified in the the
2359 authenticator. Or in other words, the answer from sasl_listmech()
2360 gets limited to just the mech you're testing for (which is different
2362 => the return list contains just 'plain' or 'login', 'cram-md5' or
2363 nothing depending on the value of ob->server_mech.
2365 I've just tested the patch: Authentication still works fine,
2366 unavailable mechs specified in the exim configuration are still
2367 caught, and the auth.log warnings about OTP are gone."
2369 PH/25 When debugging is enabled, the contents of the command line are added
2370 to the debugging output, even when log_selector=+arguments is not
2373 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2374 answer is "GNU", and only if the return is "GNU/something" is the answer
2377 PH/27 $acl_verify_message is now set immediately after the failure of a
2378 verification in an ACL, and so is available in subsequent modifiers. In
2379 particular, the message can be preserved by coding like this:
2381 warn !verify = sender
2382 set acl_m0 = $acl_verify_message
2384 Previously, $acl_verify_message was set only while expanding "message"
2385 and "log_message" when a very denied access.
2387 PH/28 Modified OS/os.c-Linux with
2389 -#ifndef OS_LOAD_AVERAGE
2390 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2392 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2393 nomenclature these days.)
2395 PH/29 Installed patch from the Sieve maintainer that adds the options
2396 sieve_useraddress and sieve_subaddress to the redirect router.
2398 PH/30 In these circumstances:
2399 . Two addresses routed to the same list of hosts;
2400 . First host does not offer TLS;
2401 . First host accepts first address;
2402 . First host gives temporary error to second address;
2403 . Second host offers TLS and a TLS session is established;
2404 . Second host accepts second address.
2405 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2406 and peerdn, if requested) that were in fact used only for the second
2409 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2410 attention to any local part prefix or suffix that was matched by the
2411 router that accepted the address. It now behaves in the same way as it
2412 does for delivery: the affixes are removed from the local part unless
2413 rcpt_include_affixes is set on the transport.
2415 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2416 timeout during the DATA phase of an incoming message.
2418 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2419 applied a patch sanctioned by the Sieve maintainer.
2421 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2422 the uid or gid is negative. A case of a negative gid caused this to be
2423 noticed. The fix allows for either to be negative.
2425 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2426 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2429 PH/36 The change PH/12 above was broken. Fixed it.
2431 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2432 the grounds that routing the same address twice would always produce the
2433 same answer. This might have been true once, but it is certainly no
2434 longer true now. Routing a child address may depend on the previous
2435 routing that produced that child. Some complicated redirection strategies
2436 went wrong when messages had multiple recipients, and made Exim's
2437 behaviour dependent on the order in which the addresses were given.
2439 I have moved the duplicate checking until after the routing is complete.
2440 Exim scans the addresses that are assigned to local and remote
2441 transports, and removes any duplicates. This means that more work will be
2442 done, as duplicates will always all be routed, but duplicates are
2443 presumably rare, so I don't expect this is of any significance.
2445 For deliveries to pipes, files, and autoreplies, the duplicate checking
2446 still happens during the routing process, since they are not going to be
2449 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2450 It corrects a timeout issue with spamd. This is Ian's comment: "The
2451 background is that sometimes spamd either never reads data from a
2452 connection it has accepted, or it never writes response data. The exiscan
2453 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2454 blindly assumes that writes won't block so it may never time out."
2456 PH/39 Allow G after quota size as well as K and M.
2458 PH/40 The value set for $authenticated_id in an authenticator may not contain
2459 binary zeroes or newlines because the value is written to log lines and
2460 to spool files. There was no check on this. Now the value is run through
2461 the string_printing() function so that such characters are converted to
2462 printable escape sequences.
2464 PH/41 $message_linecount is a new variable that contains the total number of
2465 lines in the message. Compare $body_linecount, which is the count for the
2468 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2469 bounce and delay warning messages, except in certain special cases, which
2472 (a) An SMTP error message from a remote host;
2473 (b) A message specified in a :fail: redirection;
2474 (c) A message specified in a "fail" command in a system filter;
2475 (d) A message specified in a FAIL return from the queryprogram router;
2476 (e) A message specified by the cannot_route_message router option.
2478 In these cases only, Exim does include the error details in bounce and
2479 warning messages. There are also a few cases where bland messages such
2480 as "unrouteable address" or "local delivery error" are given.
2482 PH/43 $value is now also set for the "else" part of a ${run expansion.
2484 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2485 being worked on, but at least Exim now implements the latest version to
2488 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2489 process to complete was treated as a delivery failure, a timeout while
2490 writing the message to the pipe was logged, but erroneously treated as a
2491 successful delivery. Such timeouts include transport filter timeouts. For
2492 consistency with the overall process timeout, these timeouts are now
2493 treated as errors, giving rise to delivery failures by default. However,
2494 there is now a new Boolean option for the pipe transport called
2495 timeout_defer, which, if set TRUE, converts the failures into defers for
2496 both kinds of timeout. A transport filter timeout is now identified in
2499 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2500 systems where "make" and "gmake" are different, calling "gmake" at top
2501 level broke things. I've arranged for the value of $(MAKE) to be passed
2502 from the Makefile to this script so that it can call the same version of
2506 A note about Exim versions 4.44 and 4.50
2507 ----------------------------------------
2509 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2510 changes of various kinds. As a consequence, a big documentation update was
2511 needed. This delayed the release for rather longer than seemed good, especially
2512 in the light of a couple of (minor) security issues. Therefore, the changes
2513 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2514 release. So 4.44 and 4.50 are in effect two different branches that both start
2517 I have left the 4.50 change log unchanged; it contains all the changes since
2518 4.43. The change log for 4.44 is below; many of its items are identical to
2519 those for 4.50. This seems to be the most sensible way to preserve the
2520 historical information.
2526 1. Minor wording change to the doc/README.SIEVE file.
2528 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2529 computation of the current number of files was incorrect.
2531 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2532 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2535 4. Give more explanation in the error message when the command for a transport
2536 filter fails to execute.
2538 5. There are several places where Exim runs a non-Exim command in a
2539 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2540 was being done only for the command run by the queryprogram router. It is
2541 now done for all such subprocesses. The other cases are: ${run, transport
2542 filters, and the commands run by the lmtp and pipe transports.
2544 6. Added CONFIGURE_GROUP build-time option.
2546 7. Some older OS have a limit of 256 on the maximum number of file
2547 descriptors. Exim was using setrlimit() to set 1000 as a large value
2548 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2549 systems. I've change it so that if it can't get 1000, it tries for 256.
2551 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2552 was an oversight, and furthermore, ever since the addition of extra
2553 controls (e.g. 4.43/32), the checks on when to allow different forms of
2554 "control" were broken. There should now be diagnostics for all cases when a
2555 control that does not make sense is encountered.
2557 9. Added the /retain_sender option to "control=submission".
2559 10. $recipients is now available in the predata ACL (oversight).
2561 11. Tidy the search cache before the fork to do a delivery from a message
2562 received from the command line. Otherwise the child will trigger a lookup
2563 failure and thereby defer the delivery if it tries to use (for example) a
2564 cached ldap connection that the parent has called unbind on.
2566 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2567 of $address_data from the recipient verification was clobbered by the
2568 sender verification.
2570 13. The value of address_data from a sender verification is now available in
2571 $sender_address_data in subsequent conditions in the ACL statement.
2573 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2575 15. Added a new option "connect=<time>" to callout options, to set a different
2578 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2579 was its contents. (It was OK if the option was not defined at all.)
2581 17. A "Completed" log line is now written for messages that are removed from
2582 the spool by the -Mrm option.
2584 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2585 information about exactly what failed.
2587 19. Added -dd to debug only the daemon process.
2589 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2590 handles timeouts, both on the server side and network timeouts. Renamed the
2591 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2593 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2594 It is now set to "smtps".
2596 22. $host_address is now set to the target address during the checking of
2597 ignore_target_hosts.
2599 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2600 being passed; this would have caused $sender_host_name to have been used if
2601 matching the list had actually called for a host name (not very likely,
2602 since this list is usually IP addresses). A host name is now passed as
2605 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2606 code that specifies a non-restarting handler (typically sigaction() in
2607 modern systems) in an attempt to fix a rare and obscure crash bug.
2609 25. Narrowed the window for a race in the daemon that could cause it to ignore
2610 SIGCHLD signals. This is not a major problem, because they are used only to
2611 wake it up if nothing else does.
2613 26. A malformed maildirsize file could cause Exim to calculate negative values
2614 for the mailbox size or file count. Odd effects could occur as a result.
2615 The maildirsize information is now recalculated if the size or filecount
2618 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2619 support for a long time. Removed HAVE_SYS_VFS_H.
2621 28. Installed the latest version of exipick from John Jetmore.
2623 29. In an address list, if the pattern was not a regular expression, an empty
2624 subject address (from a bounce message) matched only if the pattern was an
2625 empty string. Non-empty patterns were not even tested. This was the wrong
2626 because it is perfectly reasonable to use an empty address as part of a
2627 database query. An empty address is now tested by patterns that are
2628 lookups. However, all the other forms of pattern expect the subject to
2629 contain a local part and a domain, and therefore, for them, an empty
2630 address still always fails if the pattern is not itself empty.
2632 30. Exim went into a mad DNS loop when attempting to do a callout where the
2633 host was specified on an smtp transport, and looking it up yielded more
2634 than one IP address.
2636 31. Re-factored the code for checking spool and log partition space into a
2637 function that finds that data and another that does the check. The former
2638 is then used to implement four new variables: $spool_space, $log_space,
2639 $spool_inodes, and $log_inodes.
2641 32. The RFC2047 encoding function was originally intended for short strings
2642 such as real names; it was not keeping to the 75-character limit for
2643 encoded words that the RFC imposes. It now respects the limit, and
2644 generates multiple encoded words if necessary. To be on the safe side, I
2645 have increased the buffer size for the ${rfc2047: expansion operator from
2648 33. It is now permitted to omit both strings after an "if" condition; if the
2649 condition is true, the result is "true". As before, when the second string
2650 is omitted, a false condition yields an empty string. This makes it less
2651 cumbersome to write custom ACL and router conditions.
2653 34. Failure to deliver a bounce message always caused it to be frozen, even if
2654 there was an errors_to setting on the router. The errors_to setting is now
2657 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2658 canonical form (fully expanded) before being placed in
2659 $sender_host_address.
2661 36. The table in the code that translates DNS record types into text (T_A to
2662 "A" for instance) was missing entries for NS and CNAME. It is just possible
2663 that this could have caused confusion if both these types were looked up
2664 for the same domain, because the text type is used as part of Exim's
2665 per-process caching. But the chance of anyone hitting this buglet seems
2668 37. The dnsdb lookup has been extended in a number of ways.
2670 (1) There is a new type, "zns", which walks up the domain tree until it
2671 finds some nameserver records. It should be used with care.
2673 (2) There is a new type, "mxh", which is like "mx" except that it returns
2674 just the host names, not the priorities.
2676 (3) It is now possible to give a list of domains (or IP addresses) to be
2677 looked up. The behaviour when one of the lookups defers can be
2678 controlled by a keyword.
2680 (4) It is now possible to specify the separator character for use when
2681 multiple records are returned.
2683 38. The dnslists ACL condition has been extended: it is now possible to supply
2684 a list of IP addresses and/or domains to be looked up in a particular DNS
2687 39. Added log_selector=+queue_time_overall.
2689 40. When running the queue in the test harness, wait just a tad after forking a
2690 delivery process, to get repeatability of debugging output.
2692 41. Include certificate and key file names in error message when GnuTLS fails
2693 to set them up, because the GnuTLS error message doesn't include the name
2694 of the failing file when there is a problem reading it.
2696 42. Allow both -bf and -bF in the same test run.
2698 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2700 44. The "Exiscan patch" is now merged into the mainline Exim source.
2702 45. Sometimes the final signoff response after QUIT could fail to get
2703 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2704 < 0 before doing a fflush(). This bug looks as though it goes back to the
2705 introduction of TLS in release 3.20, but "sometimes" must have been rare
2706 because the tests only now provoked it.
2708 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2709 (this can affect the format of dates).
2711 47. exim_tidydb, when checking for the continued existence of a message for
2712 which it has found a message-specific retry record, was not finding
2713 messages that were in split spool directories. Consequently, it was
2714 deleting retry records that should have stayed in existence.
2716 48. Steve fixed some bugs in eximstats.
2718 49. The SPA authentication driver was not abandoning authentication and moving
2719 on to the next authenticator when an expansion was forced to fail,
2720 contradicting the general specification for all authenticators. Instead it
2721 was generating a temporary error. It now behaves as specified.
2723 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2724 (the order specifies the preference for clients). The order is now AES256,
2725 AES128, 3DES, ARCFOUR128.
2727 51. Small patch to Sieve code - explicitly set From: when generating an
2730 52. Exim crashed if a remote delivery caused a very long error message to be
2731 recorded - for instance if somebody sent an entire SpamAssassin report back
2732 as a large number of 550 error lines. This bug was coincidentally fixed by
2733 increasing the size of one of Exim's internal buffers (big_buffer) that
2734 happened as part of the Exiscan merge. However, to be on the safe side, I
2735 have made the code more robust (and fixed the comments that describe what
2738 53. Now that there can be additional text after "Completed" in log lines (if
2739 the queue_time_overall log selector is set), a one-byte patch to exigrep
2740 was needed to allow it to recognize "Completed" as not the last thing in
2743 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2744 patch that reportedly fixes this has been added. I am not expert enough to
2745 create a test for it. This is what the patch creator wrote:
2747 "I found a little strange behaviour of ldap code when working with
2748 Windows 2003 AD Domain, where users was placed in more than one
2749 Organization Units. When I tried to give exim partial DN, the exit code
2750 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2751 But simultaneously result of request was absolutely normal ldap result,
2752 so I produce this patch..."
2754 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2755 REFERENCE, so I have modified the code to exclude the patch when that macro
2758 55. Some experimental protocols are using DNS PTR records for new purposes. The
2759 keys for these records are domain names, not reversed IP addresses. The
2760 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2761 leaves it alone. Component reversal etc. now happens only for IP addresses.
2764 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2766 57. Double the size of the debug message buffer (to 2048) so that more of very
2767 long debug lines gets shown.
2769 58. The exicyclog utility now does better if the number of log files to keep
2770 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2772 59. Two changes related to the smtp_active_hostname option:
2774 (1) $smtp_active_hostname is now available as a variable.
2775 (2) The default for smtp_banner uses $smtp_active_hostname instead
2776 of $primary_hostname.
2778 60. The host_aton() function is supposed to be passed a string that is known
2779 to be a valid IP address. However, in the case of IPv6 addresses, it was
2780 not checking this. This is a hostage to fortune. Exim now panics and dies
2781 if the condition is not met. A case was found where this could be provoked
2782 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2783 components; fortuitously, this particular loophole had already been fixed
2784 by change 4.50/55 above.
2786 If there are any other similar loopholes, the new check in host_aton()
2787 itself should stop them being exploited. The report I received stated that
2788 data on the command line could provoke the exploit when Exim was running as
2789 exim, but did not say which command line option was involved. All I could
2790 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2791 running as the user.
2794 61. There was a buffer overflow vulnerability in the SPA authentication code
2795 (which came originally from the Samba project). I have added a test to the
2796 spa_base64_to_bits() function which I hope fixes it.
2799 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2800 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2802 63. The daemon start-up calls getloadavg() while still root for those OS that
2803 need the first call to be done as root, but it missed one case: when
2804 deliver_queue_load_max is set with deliver_drop_privilege. This is
2805 necessary for the benefit of the queue runner, because there is no re-exec
2806 when deliver_drop_privilege is set.
2808 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2809 This has been fixed.
2811 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2812 was in use, was not putting the data itself into the right store pool;
2813 consequently, it could be overwritten for a subsequent message in the same
2814 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2817 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2819 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2820 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2821 the function were treating the return as a boolean value, which happened to
2822 work because 0=false and not-0=true, but is not correct code.
2824 68. The host_aton() function was not handling scoped IPv6 addresses (those
2825 with, for example, "%eth0" on the end) correctly.
2827 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2828 negated items (that is, ~something) in unsigned ints. Some compilers
2829 apparently mutter when there is no cast.
2831 70. If an address verification called from an ACL failed, and did not produce a
2832 user-specific message (i.e. there was only a "system" message), nothing was
2833 put in $acl_verify_message. In this situation, it now puts the system
2836 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2837 session; change 4.31/43 added the unwanted input to the log line - except
2838 that it did not do this in the start of session case. It now does.
2840 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2841 This is wrong and can cause the other end to generate a synchronization
2842 error if it is another Exim or anything else that does the synchronization
2843 check. A QUIT command is no longer sent after a timeout.
2845 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2846 during host lookups.
2848 74. The defer_ok option of callout verification was not working if it was used
2849 when verifying addresses in header lines, that is, for this case:
2851 verify = header_sender/callout=defer_ok
2853 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2854 those file descriptors could be used for SMTP connections. If anything
2855 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2856 could be sent to the SMTP client, causing chaos. The daemon now opens
2857 stdin, stdout, and stderr to /dev/null when it puts itself into the
2860 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2861 log by default. The user can override this with suitable Perl magic.
2863 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2864 the log message when discard triggers, was not working for the DATA ACL or
2865 for the non-SMTP ACL.
2867 78. Error message wording change in sieve.c.
2869 79. If smtp_accept_max_per_host was set, the number of connections could be
2870 restricted to fewer than expected, because the daemon was trying to set up
2871 a new connection before checking whether the processes handling previous
2872 connections had finished. The check for completed processes is now done
2873 earlier. On busy systems, this bug wouldn't be noticed because something
2874 else would have woken the daemon, and it would have reaped the completed
2877 80. If a message was submitted locally by a user whose login name contained one
2878 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2879 It caused a spool format error. I have fixed the spool reading code. A
2880 related problem was that the "from" clause in the Received: line became
2881 illegal because of the space(s). It is now covered by ${quote_local_part.
2883 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2886 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2888 83. Patch from Sieve maintainer to fix unterminated string problem in
2889 "vacation" handling.
2891 84. Some minor changes to the Linux configuration files to help with other
2892 OS variants using glibc.
2894 85. One more patch for Sieve to update vacation handling to latest spec.
2897 ----------------------------------------------------
2898 See the note above about the 4.44 and 4.50 releases.
2899 ----------------------------------------------------
2905 1. Change 4.43/35 introduced a bug that caused file counts to be
2906 incorrectly computed when quota_filecount was set in an appendfile
2909 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2910 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2913 3. Give more explanation in the error message when the command for a transport
2914 filter fails to execute.
2916 4. There are several places where Exim runs a non-Exim command in a
2917 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2918 was being done only for the command run by the queryprogram router. It is
2919 now done for all such subprocesses. The other cases are: ${run, transport
2920 filters, and the commands run by the lmtp and pipe transports.
2922 5. Some older OS have a limit of 256 on the maximum number of file
2923 descriptors. Exim was using setrlimit() to set 1000 as a large value
2924 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2925 systems. I've change it so that if it can't get 1000, it tries for 256.
2927 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2928 was an oversight, and furthermore, ever since the addition of extra
2929 controls (e.g. 4.43/32), the checks on when to allow different forms of
2930 "control" were broken. There should now be diagnostics for all cases when a
2931 control that does not make sense is encountered.
2933 7. $recipients is now available in the predata ACL (oversight).
2935 8. Tidy the search cache before the fork to do a delivery from a message
2936 received from the command line. Otherwise the child will trigger a lookup
2937 failure and thereby defer the delivery if it tries to use (for example) a
2938 cached ldap connection that the parent has called unbind on.
2940 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2941 of $address_data from the recipient verification was clobbered by the
2942 sender verification.
2944 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2945 was its contents. (It was OK if the option was not defined at all.)
2947 11. A "Completed" log line is now written for messages that are removed from
2948 the spool by the -Mrm option.
2950 12. $host_address is now set to the target address during the checking of
2951 ignore_target_hosts.
2953 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2954 being passed; this would have caused $sender_host_name to have been used if
2955 matching the list had actually called for a host name (not very likely,
2956 since this list is usually IP addresses). A host name is now passed as
2959 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2960 code that specifies a non-restarting handler (typically sigaction() in
2961 modern systems) in an attempt to fix a rare and obscure crash bug.
2963 15. Narrowed the window for a race in the daemon that could cause it to ignore
2964 SIGCHLD signals. This is not a major problem, because they are used only to
2965 wake it up if nothing else does.
2967 16. A malformed maildirsize file could cause Exim to calculate negative values
2968 for the mailbox size or file count. Odd effects could occur as a result.
2969 The maildirsize information is now recalculated if the size or filecount
2972 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2973 support for a long time. Removed HAVE_SYS_VFS_H.
2975 18. Updated exipick to current release from John Jetmore.
2977 19. Allow an empty sender to be matched against a lookup in an address list.
2978 Previously the only cases considered were a regular expression, or an
2981 20. Exim went into a mad DNS lookup loop when doing a callout where the
2982 host was specified on the transport, if the DNS lookup yielded more than
2985 21. The RFC2047 encoding function was originally intended for short strings
2986 such as real names; it was not keeping to the 75-character limit for
2987 encoded words that the RFC imposes. It now respects the limit, and
2988 generates multiple encoded words if necessary. To be on the safe side, I
2989 have increased the buffer size for the ${rfc2047: expansion operator from
2992 22. Failure to deliver a bounce message always caused it to be frozen, even if
2993 there was an errors_to setting on the router. The errors_to setting is now
2996 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2997 canonical form (fully expanded) before being placed in
2998 $sender_host_address.
3000 24. Updated eximstats to version 1.33
3002 25. Include certificate and key file names in error message when GnuTLS fails
3003 to set them up, because the GnuTLS error message doesn't include the name
3004 of the failing file when there is a problem reading it.
3006 26. Expand error message when OpenSSL has problems setting up cert/key files.
3009 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3010 (this can affect the format of dates).
3012 28. exim_tidydb, when checking for the continued existence of a message for
3013 which it has found a message-specific retry record, was not finding
3014 messages that were in split spool directories. Consequently, it was
3015 deleting retry records that should have stayed in existence.
3017 29. eximstats updated to version 1.35
3018 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3019 1.35 - bugfix such that pie charts by volume are generated correctly
3021 30. The SPA authentication driver was not abandoning authentication and moving
3022 on to the next authenticator when an expansion was forced to fail,
3023 contradicting the general specification for all authenticators. Instead it
3024 was generating a temporary error. It now behaves as specified.
3026 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3027 (the order specifies the preference for clients). The order is now AES256,
3028 AES128, 3DES, ARCFOUR128.
3030 31. Small patch to Sieve code - explicitly set From: when generating an
3033 32. Exim crashed if a remote delivery caused a very long error message to be
3034 recorded - for instance if somebody sent an entire SpamAssassin report back
3035 as a large number of 550 error lines. This bug was coincidentally fixed by
3036 increasing the size of one of Exim's internal buffers (big_buffer) that
3037 happened as part of the Exiscan merge. However, to be on the safe side, I
3038 have made the code more robust (and fixed the comments that describe what
3041 33. Some experimental protocols are using DNS PTR records for new purposes. The
3042 keys for these records are domain names, not reversed IP addresses. The
3043 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3044 leaves it alone. Component reversal etc. now happens only for IP addresses.
3047 34. The host_aton() function is supposed to be passed a string that is known
3048 to be a valid IP address. However, in the case of IPv6 addresses, it was
3049 not checking this. This is a hostage to fortune. Exim now panics and dies
3050 if the condition is not met. A case was found where this could be provoked
3051 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3052 components; fortuitously, this particular loophole had already been fixed
3053 by change 4.50/55 or 4.44/33 above.
3055 If there are any other similar loopholes, the new check in host_aton()
3056 itself should stop them being exploited. The report I received stated that
3057 data on the command line could provoke the exploit when Exim was running as
3058 exim, but did not say which command line option was involved. All I could
3059 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3060 running as the user.
3063 35. There was a buffer overflow vulnerability in the SPA authentication code
3064 (which came originally from the Samba project). I have added a test to the
3065 spa_base64_to_bits() function which I hope fixes it.
3068 36. The daemon start-up calls getloadavg() while still root for those OS that
3069 need the first call to be done as root, but it missed one case: when
3070 deliver_queue_load_max is set with deliver_drop_privilege. This is
3071 necessary for the benefit of the queue runner, because there is no re-exec
3072 when deliver_drop_privilege is set.
3074 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3075 was in use, was not putting the data itself into the right store pool;
3076 consequently, it could be overwritten for a subsequent message in the same
3077 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3080 38. Sometimes the final signoff response after QUIT could fail to get
3081 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3082 < 0 before doing a fflush(). This bug looks as though it goes back to the
3083 introduction of TLS in release 3.20, but "sometimes" must have been rare
3084 because the tests only now provoked it.
3090 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3091 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3092 Now it returns an integer. A number of calls were still expecting a T/F
3093 return. Fortuitously, in all cases, the tests worked in OK situations,
3094 which is the norm. However, things would have gone wrong on any write
3095 failures on the smtp file descriptor. This function is used when sending
3096 messages over SMTP and also when doing verify callouts.
3098 2. When Exim is called to do synchronous delivery of a locally submitted
3099 message (the -odf or -odi options), it no longer closes stderr before doing
3102 3. Implemented the mua_wrapper option.
3104 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3106 5. Implemented the functions header_remove(), header_testname(),
3107 header_add_at_position(), and receive_remove_recipient(), and exported them
3110 6. If an ACL "warn" statement specified the addition of headers, Exim already
3111 inserted X-ACL-Warn: at the start if there was no header name. However, it
3112 was not making this test for the second and subsequent header lines if
3113 there were newlines in the string. This meant that an invalid header could
3114 be inserted if Exim was badly configured.
3116 7. Allow an ACL "warn" statement to add header lines at the start or after all
3117 the Received: headers, as well as at the end.
3119 8. Added the rcpt_4xx retry error code.
3121 9. Added postmaster_mailfrom=xxx to callout verification option.
3123 10. Added mailfrom=xxxx to the callout verification option, for verify=
3126 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3127 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3129 12. Inserted some casts to stop certain compilers warning when using pointer
3130 differences as field lengths or precisions in printf-type calls (mostly
3131 affecting debugging statements).
3133 13. Added optional readline() support for -be (dynamically loaded).
3135 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3136 same clock tick as a message's arrival, so that its received time was the
3137 same as the "first fail" time on the retry record, and that message
3138 remained on the queue past the ultimate address timeout, every queue runner
3139 would try a delivery (because it was past the ultimate address timeout) but
3140 after another failure, the ultimate address timeout, which should have then
3141 bounced the address, did not kick in. This was a "< instead of <=" error;
3142 in most cases the first failure would have been in the next clock tick
3143 after the received time, and all would be well.
3145 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3146 being recognized when the domain list was tested by the match_domain
3147 condition in an expansion string.
3149 16. Added the ${str2b64: operator.
3151 17. Exim was always calling setrlimit() to set a large limit for the number of
3152 processes, without checking whether the existing limit was already
3153 adequate. (It did check for the limit on file descriptors.) Furthermore,
3154 errors from getrlimit() and setrlimit() were being ignored. Now they are
3155 logged to the main and panic logs, but Exim does carry on, to try to do its
3156 job under whatever limits there are.
3158 18. Imported PCRE 5.0.
3160 19. Trivial typo in log message " temporarily refused connection" (the leading
3163 20. If the log selector return_path_on_delivery was set and an address was
3164 redirected to /dev/null, the delivery process crashed because it assumed
3165 that a return path would always be set for a "successful" delivery. In this
3166 case, the whole delivery is bypassed as an optimization, and therefore no
3169 21. Internal re-arrangement: the function for sending a challenge and reading
3170 a response while authentication was assuming a zero-terminated challenge
3171 string. It's now changed to take a pointer and a length, to allow for
3172 binary data in such strings.
3174 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3176 23. Exim was not respecting finduser_retries when seeking the login of the
3177 uid under which it was called; it was always trying 10 times. (The default
3178 setting of finduser_retries is zero.) Also, it was sleeping after the final
3179 failure, which is pointless.
3181 24. Implemented tls_on_connect_ports.
3183 25. Implemented acl_smtp_predata.
3185 26. If the domain in control=submission is set empty, Exim assumes that the
3186 authenticated id is a complete email address when it generates From: or
3187 Sender: header lines.
3189 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3190 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3191 chown and chgrp in /bin and hostname in /usr/bin.
3193 28. Exim was keeping the "process log" file open after each use, just as it
3194 does for the main log. This opens the possibility of it remaining open for
3195 long periods when the USR1 signal hits a daemon. Occasional processlog
3196 errors were reported, that could have been caused by this. Anyway, it seems
3197 much more sensible not to leave this file open at all, so that is what now
3200 29. The long-running daemon process does not normally write to the log once it
3201 has entered its main loop, and it closes the log before doing so. This is
3202 so that log files can straightforwardly be renamed and moved. However,
3203 there are a couple of unusual error situations where the daemon does write
3204 log entries, and I had neglected to close the log afterwards.
3206 30. The text of an SMTP error response that was received during a remote
3207 delivery was being truncated at 512 bytes. This is too short for some of
3208 the long messages that one sometimes sees. I've increased the limit to
3211 31. It is now possible to make retry rules that apply only when a message has a
3212 specific sender, in particular, an empty sender.
3214 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3215 it possible to be selective about when SMTP synchronization is enforced.
3217 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3219 32. Implemented hosts_connection_nolog.
3221 33. Added an ACL for QUIT.
3223 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3226 35. Added mailbox_size and mailbox_filecount to appendfile.
3228 36. Added control = no_multiline_responses to ACLs.
3230 37. There was a bug in the logic of the code that waits for the clock to tick
3231 in the case where the clock went backwards by a substantial amount such
3232 that the microsecond fraction of "now" was more than the microsecond
3233 fraction of "then" (but the whole seconds number was less).
3235 38. Added support for the libradius Radius client library this is found on
3236 FreeBSD (previously only the radiusclient library was supported).
3242 1. When certain lookups returned multiple values in the form name=value, the
3243 quoting of the values was not always being done properly. Specifically:
3244 (a) If the value started with a double quote, but contained no whitespace,
3246 (b) If the value contained whitespace other than a space character (i.e.
3247 tabs or newlines or carriage returns) it was not quoted.
3248 This fix has been applied to the mysql and pgsql lookups by writing a
3249 separate quoting function and calling it from the lookup code. The fix
3250 should probably also be applied to nisplus, ibase and oracle lookups, but
3251 since I cannot test any of those, I have not disturbed their existing code.
3253 2. A hit in the callout cache for a specific address caused a log line with no
3254 reason for rejecting RCPT. Now it says "Previous (cached) callout
3255 verification failure".
3257 3. There was an off-by-one bug in the queryprogram router. An over-long
3258 return line was truncated at 256 instead of 255 characters, thereby
3259 overflowing its buffer with the terminating zero. As well as fixing this, I
3260 have increased the buffer size to 1024 (and made a note to document this).
3262 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3263 when Exim is waiting for an SMTP response from a remote server, Exim
3264 restarts its select() call on the socket, thereby resetting its timeout.
3265 This is not a problem when such interrupts are rare. Somebody set up a cron
3266 job to run exiwhat every 2 minutes, which is less than the normal select()
3267 timeout (5 or 10 minutes). This meant that the select() timeout never
3268 kicked in because it was always reset. I have fixed this by comparing the
3269 time when an interrupt arrives with the time at the start of the first call
3270 to select(). If more time than the timeout has elapsed, the interrupt is
3271 treated as a timeout.
3273 5. Some internal re-factoring in preparation for the addition of Sieve
3274 extensions (by MH). In particular, the "personal" test is moved to a
3275 separate function, and given an option for scanning Cc: and Bcc: (which is
3276 not set for Exim filters).
3278 6. When Exim created an email address using the login of the caller as the
3279 local part (e.g. when creating a From: or Sender: header line), it was not
3280 quoting the local part when it contained special characters such as @.
3282 7. Installed new OpenBSD configuration files.
3284 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3285 try to make them clearer.
3287 9. Callout options, other than the timeout value, were being ignored when
3288 verifying sender addresses in header lines. For example, when using
3290 verify = header_sender/callout=no_cache
3292 the cache was (incorrectly) being used.
3294 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3295 only the Cygwin environment.
3297 11. When return_path_on_delivery was set as a log selector, if different remote
3298 addresses in the same message used different return paths and parallel
3299 remote delivery occurred, the wrong values would sometimes be logged.
3300 (Whenever a remote delivery process finished, the return path value from
3301 the most recently started remote delivery process was logged.)
3303 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3304 lines when AUTH and/or TLS are in use. This is the "received protocol"
3305 field. Exim used to use "asmtp" for authenticated SMTP, without any
3306 indication (in the protocol name) for TLS use. Now it follows the RFC and
3307 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3308 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3309 names appear in log lines as well as in Received: header lines.
3311 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3312 extensions, and comparison tests, and to fix some bugs.
3314 14. Changes to the "personal" filter test:
3316 (1) The test was buggy in that it was just doing the equivalent of
3317 "contains" tests on header lines. For example, if a user's address was
3318 anne@some.where, the "personal" test would incorrectly be true for
3320 To: susanne@some.where
3322 This test is now done by extracting each address from the header in turn,
3323 and checking the entire address. Other tests that are part of "personal"
3324 are now done using regular expressions (for example, to check local parts
3325 of addresses in From: header lines).
3327 (2) The list of non-personal local parts in From: addresses has been
3328 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3329 taken from the Sieve specification recommendations.
3331 (3) If the message contains any header line starting with "List-" it is
3332 treated as non-personal.
3334 (4) The test for "circular" in the Subject: header line has been removed
3335 because it now seems ill-conceived.
3337 15. Minor typos in src/EDITME comments corrected.
3339 16. Installed latest exipick from John Jetmore.
3341 17. If headers_add on a router specified a text string that was too long for
3342 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3343 of string_sprintf() is now avoided.
3345 18. $message_body_size was not set (it was always zero) when running the DATA
3346 ACL and the local_scan() function.
3348 19. For the "mail" command in an Exim filter, no default was being set for
3349 the once_repeat time, causing a random time value to be used if "once" was
3350 specified. (If the value happened to be <= 0, no repeat happened.) The
3351 default is now 0s, meaning "never repeat". The "vacation" command was OK
3352 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3353 (I found it when inspecting the code).
3355 20. There is now an overall timeout for performing a callout verification. It
3356 defaults to 4 times the callout timeout, which applies to individual SMTP
3357 commands during the callout. The overall timeout applies when there is more
3358 than one host that can be tried. The timeout is checked before trying the
3359 next host. This prevents very long delays if there are a large number of
3360 hosts and all are timing out (e.g. when the network connections are timing
3361 out). The value of the overall timeout can be changed by specifying an
3362 additional sub-option for "callout", called "maxwait". For example:
3364 verify = sender/callout=5s,maxwait=20s
3366 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3367 to the end before writing, but this should make it even safer).
3369 22. Exim was forgetting that it had advertised PIPELINING for the second and
3370 subsequent messages on an SMTP connection. It was also not resetting its
3371 memory on STARTTLS and an internal HELO.
3373 23. When Exim logs an SMTP synchronization error within a session, it now
3374 records whether PIPELINING has been advertised or not.
3376 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3377 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3378 rather than long int.
3380 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3382 26. Added the never_mail option to autoreply.
3388 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3389 crash if the getsockname() call failed; this can happen if a connection is
3390 closed very soon after it is established. The problem was simply in the
3391 order in which certain operations were done, causing Exim to try to write
3392 to the SMTP stream before it had set up the file descriptor. The bug has
3393 been fixed by making things happen in the correct order.
3399 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3400 before the connection was closed, thus losing the rejection response.
3402 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3403 some early Solaris releases, but causes trouble in current releases where
3404 socklen_t is defined.
3406 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3409 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3412 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3413 that releasing the top of it at the end releases what was used for sub-
3414 expansions (unless the block got too big). However, discard this block if
3415 the first thing is a variable or header, so that we can use its block when
3416 it is dynamic (useful for very large $message_headers, for example).
3418 6. Lookups now cache *every* query, not just the most recent. A new, separate
3419 store pool is used for this. It can be recovered when all lookup caches are
3420 flushed. Lookups now release memory at the end of their result strings.
3421 This has involved some general refactoring of the lookup sources.
3423 7. Some code has been added to the store_xxx() functions to reduce the amount
3424 of flapping under certain conditions.
3426 8. log_incoming_interface used to affect only the <= reception log lines. Now
3427 it causes the local interface and port to be added to several more SMTP log
3428 lines, for example "SMTP connection from", and rejection lines.
3430 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3432 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3434 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3435 could be overwritten at the end of the current message (or the start of a
3436 new message if it was set in a HELO ACL). The value is now preserved for
3437 the duration of the SMTP connection.
3439 12. If a transport had a headers_rewrite setting, and a matching header line
3440 contained an unqualified address, that address was qualified, even if it
3441 did not match any rewriting rules. The underlying bug was that the values
3442 of the flags that permit the existence of unqualified sender and recipient
3443 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3444 non-local messages, and by -bnq for local messages) were not being
3445 preserved with the message after it was received.
3447 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3448 "next input=" as part of the text comprising the host identity instead of
3449 the correct text. The code was using the same buffer for two different
3450 strings. However, depending on which order the printing function evaluated
3451 its arguments, the bug did not always show up. Under Linux, for example, my
3452 test suite worked just fine.
3454 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3455 doesn't work with some older versions of Perl. It has been changed to "my",
3456 which in any case is probably the better facility to use.
3458 15. A really picky compiler found some instances of statements for creating
3459 error messages that either had too many or two few arguments for the format
3462 16. The size of the buffer for calls to the DNS resolver has been increased
3463 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3464 for addresses that have a lot of PTR records. This alleviates a problem; it
3465 does not fully solve it.
3467 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3468 buffer now truncates the list and logs the incident, which is the same
3469 action as happens when Exim is looking up a host name and its aliases.
3470 Previously in this situation something unpredictable would happen;
3471 sometimes it was "internal error: store_reset failed".
3473 18. If a server dropped the connection unexpectedly when an Exim client was
3474 using GnuTLS and trying to read a response, the client delivery process
3475 crashed while trying to generate an error log message.
3477 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3478 string, for example:
3480 warn message = H1: something\nH2: something
3482 the text was added as a single header line from Exim's point of view
3483 though it ended up OK in the delivered message. However, searching for the
3484 second and subsequent header lines using $h_h2: did not work. This has been
3485 fixed. Similarly, if a system filter added multiple headers in this way,
3486 the routers could not see them.
3488 20. Expanded the error message when iplsearch is called with an invalid key to
3489 suggest using net-iplsearch in a host list.
3491 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3492 ACLs are no longer actually imposed (and a message to that effect is
3495 22. If a "gecos" field in a passwd entry contained escaped characters, in
3496 particular, if it contained a \" sequence, Exim got it wrong when building
3497 a From: or a Sender: header from that name. A second bug also caused
3498 incorrect handling when an unquoted " was present following a character
3499 that needed quoting.
3501 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3502 was not being matched caselessly.
3504 24. Arranged for all hyphens in the exim.8 source to be escaped with
3507 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3508 properly. Recipient callout cache records were still being keyed to include
3509 the sender, even when use_sender was set false. This led to far more
3510 callouts that were necessary. The sender is no longer included in the key
3511 when use_sender is false.
3513 26. Added "control = submission" modifier to ACLs.
3515 27. Added the ${base62d: operator to decode base 62 numbers.
3517 28. dnsdb lookups can now access SRV records.
3519 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3520 the configuration file.
3522 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3523 (-v) mode. This makes the output for a verbose queue run more intelligible.
3525 31. Added a use_postmaster feature to recipient callouts.
3527 32. Added the $body_zerocount variable, containing the number of binary zero
3528 bytes in the message body.
3530 33. The time of last modification of the "new" subdirectory is now used as the
3531 "mailbox time last read" when there is a quota error for a maildir
3534 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3536 35. Added +ignore_unknown as a special item in host lists.
3538 36. Code for decoding IPv6 addresses in host lists is now included, even if
3539 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3540 address was recognized as an IP address, but was then not correctly decoded
3541 into binary, causing unexpected and incorrect effects when compared with
3548 1. Very minor rewording of debugging text in manualroute to say "list of
3549 hosts" instead of "hostlist".
3551 2. If verify=header_syntax was set, and a header line with an unqualified
3552 address (no domain) and a large number of spaces between the end of the
3553 name and the colon was received, the reception process suffered a buffer
3554 overflow, and (when I tested it) crashed. This was caused by some obsolete
3555 code that should have been removed. The fix is to remove it!
3557 3. When running in the test harness, delay a bit after writing a bounce
3558 message to get a bit more predictability in the log output.
3560 4. Added a call to search_tidyup() just before forking a reception process. In
3561 theory, someone could use a lookup in the expansion of smtp_accept_max_
3562 per_host which, without the tidyup, could leave open a database connection.
3564 5. Added the variables $recipient_data and $sender_data which get set from a
3565 lookup success in an ACL "recipients" or "senders" condition, or a router
3566 "senders" option, similar to $domain_data and $local_part_data.
3568 6. Moved the writing of debug_print from before to after the "senders" test
3571 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3572 problems for message scanning, either using a data ACL, or using
3573 local_scan() because the Received: header was not generated till after they
3574 were called (in order to set the time as the time of reception completion).
3575 I have revised the way this works. The header is now generated after the
3576 body is received, but before the ACL or local_scan() are called. After they
3577 are run, the timestamp in the header is updated.
3583 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3584 before starting a queue runner without re-exec. This happened only when
3585 deliver_drop_privilege was set or when the Exim user was set to root. The
3586 effect of the bug was that timeouts during subsequent deliveries caused
3587 crashes instead of being properly handled. The handler is now left at its
3588 default (and expected) setting.
3590 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3591 message, again when deliver_drop_privilege is set or Exim is run as root.
3592 The bug described in (1) was not present in this case, but the tidying up
3593 of the other signals was missing. I have made the two cases consistent.
3595 3. The ignore_target_hosts setting on a manualroute router was being ignored
3596 for hosts that were looked up using the /MX notation.
3598 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3601 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3602 operated on the sender address. After changing the $sender_address to <>
3603 for the sender address verify, Exim was re-instated it as the original
3604 (before rewriting) address, but remembering that it had rewritten it, so it
3605 wasn't rewriting it again. This bug also had the effect of breaking the
3606 sender address verification caching when the sender address was rewritten.
3608 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3609 This has been changed so that if the ip literal address matches
3610 ignore_target_hosts, the router declines.
3612 7. Added expansion conditions match_domain, match_address, and match_local_
3613 part (NOT match_host).
3615 8. The placeholder for the Received: header didn't have a length field set.
3617 9. Added code to Exim itself and to exim_lock to test for a specific race
3618 condition that could lead to file corruption when using MBX delivery. The
3619 issue is with the lockfile that is created in /tmp. If this file is removed
3620 after a process has opened it but before that process has acquired a lock,
3621 there is the potential for a second process to recreate the file and also
3622 acquire a lock. This could lead to two Exim processes writing to the file
3623 at the same time. The added code performs the same test as UW imapd; it
3624 checks after acquiring the lock that its file descriptor still refers to
3625 the same named file.
3627 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3628 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3631 11. Added the smtp_active_hostname option. If used, this will typically be made
3632 to depend on the incoming interface address. Because $interface_address is
3633 not set up until the daemon has forked a reception process, error responses
3634 that can happen earlier (such as "too many connections") no longer contain
3637 12. If an expansion in a condition on a "warn" statement fails because a lookup
3638 defers, the "warn" statement is abandoned, and the next ACL statement is
3639 processed. Previously this caused the whole ACL to be aborted.
3641 13. Added the iplsearch lookup type.
3643 14. Added ident_timeout as a log selector.
3645 15. Added tls_certificate_verified as a log selector.
3647 16. Added a global option tls_require_ciphers (compare the smtp transport
3648 option of the same name). This controls incoming TLS connections.
3650 17. I finally figured out how to make tls_require_ciphers do a similar thing
3651 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3652 before starting the TLS session.
3654 18. Tabs are now shown as \t in -bP output.
3656 19. If the log selector return_path_on_delivery was set, Exim crashed when
3657 bouncing a message because it had too many Received: header lines.
3659 20. If two routers both had headers_remove settings, and the first one included
3660 a superfluous trailing colon, the final name in the first list and the
3661 first name in the second list were incorrectly joined into one item (with a
3662 colon in the middle).
3668 1. Added -C and -D options to the exinext utility, mainly to make it easier
3669 to include in the automated testing, but these could be helpful when
3670 multiple configurations are in use.
3672 2. The exinext utility was not formatting the output nicely when there was
3673 an alternate port involved in the retry record key, nor when there was a
3674 message id as well (for retries that were specific to a specific message
3675 and a specific host). It was also confused by IPv6 addresses, because of
3676 the additional colons they contain. I have fixed the IPv4 problem, and
3677 patched it up to do a reasonable job for IPv6.
3679 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3680 delivery, the log line now contains "pipelined" if PIPELINING was used.
3682 4. An SMTP transport process used to panic and die if the bind() call to set
3683 an explicit outgoing interface failed. This has been changed; it is now
3684 treated in the same way as a connect() failure.
3686 5. A reference to $sender_host_name in the part of a conditional expansion
3687 that was being skipped was still causing a DNS lookup. This no longer
3690 6. The def: expansion condition was not recognizing references to header lines
3691 that used bh_ and bheader_.
3693 7. Added the _cache feature to named lists.
3695 8. The code for checking quota_filecount in the appendfile transport was
3696 allowing one more file than it should have been.
3698 9. For compatibility with Sendmail, the command line option
3706 and sets the incoming protocol and host name (for trusted callers). The
3707 host name and its colon can be omitted when only the protocol is to be set.
3708 Note the Exim already has two private options, -pd and -ps, that refer to
3709 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3710 "s", but I don't think that's a major issue.
3712 10. A number of refactoring changes to the code, none of which should affect
3715 (a) The number of logging options was getting close to filling up the
3716 32-bit word that was used as a bit map. I have split them into two classes:
3717 those that are passed in the argument to log_write(), and those that are
3718 only ever tested independently outside of that function. These are now in
3719 separate 32-bit words, so there is plenty of room for expansion again.
3720 There is no change in the user interface or the logging behaviour.
3722 (b) When building, for example, log lines, the code previously used a
3723 macro that called string_cat() twice, in order to add two strings. This is
3724 not really sufficiently general. Furthermore, there was one instance where
3725 it was actually wrong because one of the argument was used twice, and in
3726 one call a function was used. (As it happened, calling the function twice
3727 did not affect the overall behaviour.) The macro has been replaced by a
3728 function that can join an arbitrary number of extra strings onto a growing
3731 (c) The code for expansion conditions now uses a table and a binary chop
3732 instead of a serial search (which was left over from when there were very
3733 few conditions). Also, it now recognizes conditions like "pam" even when
3734 the relevant support is not compiled in: a suitably worded error message is
3735 given if an attempt is made to use such a condition.
3737 11. Added ${time_interval:xxxxx}.
3739 12. A bug was causing one of the ddress fields not to be passed back correctly
3740 from remote delivery subprocesses. The field in question was not being
3741 subsequently used, so this caused to problems in practice.
3743 13. Added new log selectors queue_time and deliver_time.
3745 14. Might have fixed a bug in maildirsizefile handling that threw up
3746 "unexpected character" debug warnings, and recalculated the data
3747 unnecessarily. In any case, I expanded the warning message to give more
3750 15. Added the message "Restricted characters in address" to the statements in
3751 the default ACL that block characters like @ and % in local parts.
3753 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3754 Three changes have been made:
3756 (a) There was a serious bug; a negative response to MAIL caused the whole
3757 recipient domain to be cached as invalid, thereby blocking all messages
3758 to all local parts at the same domain, from all senders. This bug has
3759 been fixed. The domain is no longer cached after a negative response to
3760 MAIL if the sender used is not empty.
3762 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3765 (c) A new callout option, "use_sender" has been added for people who want
3766 the modified behaviour.
3772 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3775 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3776 indeed breaks things for older releases.
3778 3. Added additional logging to the case where there is a problem reading data
3779 from a filter that is running in a subprocess using a pipe, in order to
3780 try to track down a specific problem.
3782 4. Testing facility fudge: when running in the test harness and attempting
3783 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3784 getting "No route to host". Convert this to a timeout.
3786 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3789 6. Some OS don't have socklen_t but use size_t instead. This affects the
3790 fifth argument of getsockopt() amongst other things. This is now
3791 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3792 can be set for individual OS. I have set it for SunOS5, OSF1, and
3793 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3794 some earlier ones do not.
3796 7. Change 4.30/15 was not doing the test caselessly.
3798 8. The standard form for an IPv6 address literal was being rejected by address
3799 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3800 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3801 this, as well as the form without the "IPv6" on the front (but only when
3802 address literals are enabled, of course).
3804 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3806 10. Exim crashed if a message with an empty sender address specified by -f
3807 encountered a router with an errors_to setting. This could be provoked only
3808 by a command such as
3812 where an empty string was supplied; "<>" did not hit this bug.
3814 11. Installed PCRE release 4.5.
3816 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3817 remained set. It is now erased.
3819 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3820 times from message ids (which are base 36 rather than the normal 62).
3822 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3823 were being counted as actual protocol errors, and logged if the log
3824 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3825 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3826 and DATA following a set of rejected RCPTs do not count as protocol errors.
3827 In other words, Exim assumes they were pipelined, though this may not
3828 actually be the case. Of course, in all cases the client gets an
3829 appropriate error code.
3831 15. If a lookup fails in an ACL condition, a message about the failure may
3832 be available; it is used if testing the ACL cannot continue, because most
3833 such messages specify what the cause of the deferral is. However, some
3834 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3835 that caused an old message to be retained and used if a later statement
3836 caused a defer, replacing the real cause of the deferral.
3838 16. If an IP address had so many PTR records that the DNS lookup buffer
3839 was not large enough to hold them, Exim could crash while trying to process
3840 the truncated data. It now detects and logs this case.
3842 17. Further to 4.21/58, another change has been made: if (and only if) the
3843 first line of a message (the first header line) ends with CRLF, a bare LF
3844 in a subsequent header line has a space inserted after it, so as not to
3845 terminate the header.
3847 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3848 unnecessarily, used atoi() instead of strtol(), and didn't check the
3849 termination when getting file sizes from file names by regex.
3851 19. Completely re-implemented the support for maildirsize files, in the light
3852 of a number of problems with the previous contributed implementation
3853 (4.30/29). In particular:
3855 . If the quota is zero, the maildirsize file is maintained, but no quota is
3858 . If the maildir directory does not exist, it is created before any attempt
3859 to write a maildirsize file.
3861 . The quota value in the file is just a cache; if the quota is changed in
3862 the transport, the new value overrides.
3864 . A regular expression is available for excluding directories from the
3867 20. The autoreply transport checks the characters in options that define the
3868 message's headers; it allows continued headers, but it was checking with
3869 isspace() after an embedded newline instead of explicitly looking for a
3872 21. If all the "regular" hosts to which an address was routed had passed their
3873 expiry times, and had not reached their retry times, the address was
3874 bounced, even if fallback hosts were defined. Now Exim should go on to try
3877 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3878 equivalent code in the SMTP transport. Some hosts send humungous responses
3879 to HELO/EHLO, more than 1024 it seems.
3881 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3882 gives compiler warnings in some environments. I've now done it "properly",
3885 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3886 (because of problems with the built-in one) was declared to return uschar *
3887 instead of char *, causing compiler failure.
3889 25. Fixed a file descriptor leak when processing alias/forward files.
3891 26. Fixed a minor format string issue in dbfn.c.
3893 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3895 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3896 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3899 29. When a sender address is verified, it is cached, to save repeating the test
3900 when there is more than one recipient in a message. However, when the
3901 verification involves a callout, it is possible for different callout
3902 options to be set for different recipients. It is too complicated to keep
3903 track of this in the cache, so now Exim always runs a verification when a
3904 callout is required, relying on the callout cache for the optimization.
3905 The overhead is duplication of the address routing, but this should not be
3908 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3909 to be verified with callout=postmaster, and the main callout worked but the
3910 postmaster check failed, the verification correctly failed. However, if a
3911 subsequent RCPT command asked for sender verification *without* the
3912 postmaster check, incorrect caching caused this verification also to fail,
3915 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3916 it was not caching the DNS options (qualify_single, search_parents) that
3917 were used when the lookup failed. A subsequent lookup with different
3918 options therefore always gave the same answer, though there were cases
3919 where it should not have. (Example: a "domains = !$mx_any" option on a
3920 dnslookup router: the "domains" option is always processed without any
3921 widening, but the router might have qualify_single set.) Now Exim uses the
3922 cached value only when the same options are set.
3924 32. Added John Jetmore's "exipick" utility to the distribution.
3926 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3927 than a timeout (e.g. a certificate is required, and is not provided), an
3928 Exim server now closes the connection immediately. Previously it waited for
3929 the client to close - but if the client is SSL, it seems that they each
3930 wait for each other, leading to a delay before one of them times out.
3932 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3933 maintained 0.8.x compatibility because I don't think many are using it, and
3934 it is clearly obsolete.
3936 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3939 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3940 client certificate was expired. A simple patch fixes this, though I don't
3941 understand the full logic of why the verify callback is called multiple
3944 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3945 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3946 which causes problems with some clients (such as the Certicom SSL Plus
3947 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3948 disables the coutermeasure allowing Eudora to connect."
3950 38. Exim was not checking that a write() to a log file succeeded. This could
3951 lead to Bad Things if a log got too big, in particular if it hit a file
3952 size limit. Exim now panics and dies if it cannot write to a log file, just
3953 as it does if it cannot open a log file.
3955 39. Modified OS/Makefile-Linux so that it now contains
3957 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3959 The two -D definitions ensure that Exim is compiled with large file
3960 support, which makes it possible to handle log files that are bigger than
3963 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3964 instance) a domain was checked against a named list that involved a lookup,
3965 causing $domain_data to be set, then another domain was checked against the
3966 same list, then the first domain was re-checked, the value of $domain_data
3967 after the final check could be wrong. In particular, if the second check
3968 failed, it could be set empty. This bug probably also applied to
3971 41. The strip_trailing_dot option was not being applied to the address given
3972 with the -f command-line option.
3974 42. The code for reading a message's header from the spool was incrementing
3975 $received_count, but never initializing it. This meant that the value was
3976 incorrect (doubled) while delivering a message in the same process in which
3977 it was received. In the most common configuration of Exim, this never
3978 happens - a fresh exec is done - but it can happen when
3979 deliver_drop_privilege is set.
3981 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3982 it now includes up to 150 characters of the unexpected data in the log
3985 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3986 and building data strings. The size of both of these buffers was 10 000
3987 bytes - far larger than anybody would *ever* want, thought I. Needless to
3988 say, somebody hit the limit. I have increased the maximum line length to
3989 20 000 and the maximum data length of concatenated lines to 100 000. I have
3990 also fixed two bugs, because there was no checking on these buffers. Tsk,
3991 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3992 buffer is too small.
3994 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3995 lsearch lookups. Now it does.
3997 46. When parsing a route_list item in a manualroute router, a fixed-length
3998 buffer was used for the list of hosts. I made this 1024 bytes long,
3999 thinking that nobody would ever have a list of hosts that long. Wrong.
4000 Somebody had a whole pile of complicated expansion conditions, and the
4001 string was silently truncated, leading to an expansion error. It turns out
4002 that it is easier to change to an unlimited length (owing to other changes
4003 that have happened since this code was originally written) than to build
4004 structure for giving a limitation error. The length of the item that
4005 expands into the list of hosts is now unlimited.
4007 47. The lsearch lookup could not handle data where the length of text line was
4008 more than 4095 characters. Such lines were truncated, leading to shortened
4009 data being returned. It should now handle lines of any length.
4011 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4012 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4015 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4016 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4017 no longer happens in comment lines. A list of replacements is now placed
4018 at the head of all of the source files, except those whose only change is
4019 to replace PERL_COMMAND in the very first #! line.
4021 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4022 messages on the queue, with a bottom-up merge sort, using code contributed
4023 by Michael Haardt. This should make operations like -bp somewhat faster on
4024 large queues. It won't affect queue runners, except when queue_run_in_order
4027 51. Installed eximstats 1.31 in the distribution.
4029 52. Added support for SRV lookups to the dnslookup router.
4031 53. If an ACL referred to $message_body or $message_body_end, the value was not
4032 reset for any messages that followed in the same SMTP session.
4034 54. The store-handling optimization for building very long strings was not
4035 differentiating between the different store pools. I don't think this
4036 actually made any difference in practice, but I've tidied it.
4038 55. While running the routers to verify a sender address, $sender_address
4039 was still set to the sender address. This is wrong, because when routing to
4040 send a bounce to the sender, it would be empty. Therefore, I have changed
4041 it so that, while verifying a sender address, $sender_address is set to <>.
4042 (There is no change to what happens when verifying a recipient address.)
4044 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4045 target A or AAAA records (if not already returned) without resetting the
4046 qualify_single or search_parents options of the DNS resolver. These are
4047 inappropriate in this case because the targets of MX and SRV records must
4048 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4049 target that, when qualified, matched something in the local domain. These
4050 two options are now turned off when doing these lookups.
4052 57. It seems that at least some releases of Reiserfs (which does not have the
4053 concept of a fixed number of inodes) returns zero and not -1 for the
4054 number of available inodes. This interacted badly with check_spool_inodes,
4055 which assumed that -1 was the "no such thing" setting. What I have done is
4056 to check that the total number of inodes is greater than zero before doing
4057 the test of how many are available.
4059 58. When a "warn" ACL statement has a log_message modifier, the message is
4060 remembered, and not repeated. This is to avoid a lot of repetition when a
4061 message has many recipients that cause the same warning to be written.
4062 Howewer, Exim was preserving the list of already written lines for an
4063 entire SMTP session, which doesn't seem right. The memory is now reset if a
4064 new message is started.
4066 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4067 debugging output unless log_rewrite was also set.
4069 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4070 of (int)(handle) when we know that handle contains (void *)(-1).
4072 61. The Exim daemon panic-logs an error return when it closes the incoming
4073 connection. However "connection reset by peer" seems to be common, and
4074 isn't really an error worthy of noting specially, so that particular error
4077 62. When Exim is trying to find all the local interfaces, it used to panic and
4078 die if the ioctl to get the interface flags failed. However, it seems that
4079 on at least one OS (Solaris 9) it is possible to have an interface that is
4080 included in the list of interfaces, but for which you get a failure error
4081 for this call. This happens when the interface is not "plumbed" into a
4082 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4083 failure of the "get flags" call assumes that the interface is down.
4085 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4086 makes life easier for people who are doing arithmetic on fields extracted
4087 from dates, where you often get leading zeros that should not be
4088 interpreted as octal.
4090 64. Added qualify_domain to the redirect router, to override the global
4093 65. If a pathologically long header line contained very many addresses (the
4094 report of this problem mentioned 10 000) and each of them was rewritten,
4095 Exim could use up a very large amount of memory. (It kept on making new
4096 copies of the header line as it rewrote, and never released the old ones.)
4097 At the expense of a bit more processing, the header rewriting function has
4098 been changed so that it no longer eats memory in this way.
4100 66. The generation of the Received: header has been moved from the time that a
4101 message starts to be received, to the time that it finishes. The timestamp
4102 in the Received: header should now be very close to that of the <= log
4103 line. There are two side-effects of this change:
4105 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4106 logged header lines no longer include the local Received: line, because
4107 it has not yet been created. The same applies to a copy of the message
4108 that is returned to a non-SMTP sender when a message is rejected.
4110 (b) When a filter file is tested using -bf, no additional Received: header
4111 is added to the test message. After some thought, I decided that this
4114 This change does not affect the value of $received_for. It is still set
4115 after address rewriting, but before local_scan() is called.
4117 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4119 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4120 gave an unhelpful panic error message, and a defer error. I have managed to
4121 change this behaviour so that it now rejects any supplied certificate,
4122 which seems right, as the list of acceptable certificates is empty.
4124 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4125 gave an unhelpful defer error. I have not managed to make this reject any
4126 supplied certificates, but the error message it gives is "no certificate
4127 supplied", which is not helpful.
4129 70. exigrep's output now also includes lines that are not associated with any
4130 message, but which match the given pattern. Implemented by a patch from
4131 Martin Sluka, which also tidied up the Perl a bit.
4133 71. Recipient callout verification, like sender verification, was using <> in
4134 the MAIL FROM command. This isn't really the right thing, since the actual
4135 sender may affect whether the remote host accepts the recipient or not. I
4136 have changed it to use the actual sender in the callout; this means that
4137 the cache record is now keyed on a recipient/sender pair, not just the
4138 recipient address. There doesn't seem to be a real danger of callout loops,
4139 since a callout by the remote host to check the sender would use <>.
4140 [SEE ABOVE: changed after hitting problems.]
4142 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4143 temporary errors. However, in the case of such a code being given after
4144 the end of a data transmission (i.e. after ".") Exim was failing to write
4145 a retry record for the message. (Yes, there was some broken host that was
4146 actually sending 8xx at this point.)
4148 73. An unknown lookup type in a host list could cause Exim to panic-die when
4149 the list was checked. (An example that provoked this was putting <; in the
4150 middle of a list instead of at the start.) If this happened during a DATA
4151 ACL check, a -D file could be left lying around. This kind of configuration
4152 error no longer causes Exim to die; instead it causes a defer errror. The
4153 incident is still logged to the main and panic logs.
4155 74. Buglet left over from Exim 3 conversion. The message "too many messages
4156 in one connection" was written to the rejectlog but not the mainlog, except
4157 when address rewriting (yes!) was being logged.
4159 75. Added write_rejectlog option.
4161 76. When a system filter was run not as root (that is, when system_filter_user
4162 was set), the values of the $n variables were not being returned to the
4163 main process; thus, they were not subsequently available in the $sn
4166 77. Added +return_path_on_delivery log selector.
4168 78. A connection timeout was being treated differently from recipients deferred
4169 when testing hosts_max_try with a message that was older than the host's
4170 retry timeout. (The host should not be counted, thus allowing all hosts to
4171 be tried at least once before bouncing.) This may have been the cause of an
4172 occasionally reported bug whereby a message would remain on the queue
4173 longer than the retry timeout, but would be bounced if a delivery was
4174 forced. I say "may" because I never totally pinned down the problem;
4175 setting up timeout/retry tests is difficult. See also the next item.
4177 79. The ultimate address timeout was not being applied to errors that involved
4178 a combination of host plus message (for example, a timeout on a MAIL
4179 command). When an address resolved to a number of possible hosts, and they
4180 were not all tried for each delivery (e.g. because of hosts_max_try), a
4181 message could remain on the queue longer than the retry timeout.
4183 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4186 81. Fixed an obscure SMTP outgoing bug which required at least the following
4187 conditions: (a) there was another message waiting for the same server;
4188 (b) the server returned 5xx to all RCPT commands in the first message so
4189 that the message was not completed; (c) the server dropped the connection
4190 or gave a negative response to the RSET that Exim sends to abort the
4191 transaction. The observed case was a dropped connection after DATA that had
4192 been sent in pipelining mode. That is, the server had advertised PIPELINING
4193 but was not implementing it correctly. The effect of the bug was incorrect
4194 behaviour, such as trying another host, and this could lead to a crash.
4200 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4201 and daemon.c were passed as pointers to ints; they should have been
4202 pointers to socklen_t variables (which are typically unsigned ints).
4204 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4207 3. Fixed a really odd bug that affected only the testing scheme; patching a
4208 certain fixed string in the binary changed the value of another string that
4209 happened to be identical to the end of the original first string.
4211 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4212 name", it returns that address as the IP address. On some operating
4213 systems (e.g. Solaris), it also passes back the IP address string as the
4214 "host name". However, on others (e.g. Linux), it passes back an empty
4215 string. Exim wasn't checking for this, and was changing the host name to an
4216 empty string, assuming it had been canonicized.
4218 5. Although rare, it is permitted to have more than one PTR record for a given
4219 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4220 all the names associated with an address, because they do in Solaris.
4221 However, it seems that they do not in Linux for data that comes from the
4222 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4223 I found this out when I moved to a new Linux workstation and tried to run
4224 the Exim test suite.
4226 To get round this problem I have changed the code so that it now does its
4227 own call to the DNS to look up PTR records when searching for a host name.
4228 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4229 addresses that are only in /etc/hosts are still found.
4231 This behaviour is, however, controlled by an option called host_lookup_
4232 order, which defaults to "bydns:byaddr". If people want to use the other
4233 order, or indeed, just use one or the other means of lookup, they can
4234 specify it in this variable.
4236 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4237 some operating systems, this comes back from gethostbyaddr() as an empty
4238 string, and this is what Exim used to test for. However, it seems that in
4239 other systems, "." is yielded. Exim now tests for this case too.
4241 7. The values of check_spool_space and check_log_space are now held internally
4242 as a number of kilobytes instead of an absolute number of bytes. If a
4243 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4244 kilobyte. This means that much larger values can be stored.
4246 8. Exim monitor: an attempt to get the action menu when not actually pointing
4247 at a message produces an empty menu entitled "No message selected". This
4248 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4249 no entries in it ("Shell widget menu has zero width and/or height"). So I
4250 have added a single, blank menu entry in this case.
4252 9. Added ${quote_local_part.
4254 10. MIME decoding is now applied to the contents of Subject: header lines when
4257 11. Now that a reference to $sender_host_address automatically causes a reverse
4258 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4259 host lookup before query-style lookups in lists that might use this
4260 variable. This has therefore been abolished, and the "net-" prefix is no
4261 longer necessary for query-style lookups.
4263 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4264 have been a typo for LFLAGS, so it has been changed.
4266 13. The install script calls Exim with "-C /dev/null" in order to find the
4267 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4268 to be output. Howeve, since Exim outputs its version number before the
4269 error, it didn't break the script. It just looked ugly. I fixed this by
4270 always allowing "-C /dev/null" if the caller is root.
4272 14. Ignore overlarge ACL variable number when reading spool file - insurance
4273 against a later release with more variables having written the file.
4275 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4276 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4277 this, as well as the form without the "IPv6" on the front.
4279 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4280 OS/Makefile-Darwin file.
4282 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4283 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4285 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4286 variable. However, some OS use ints for inodes. I've added cast to long int
4287 to get rid of the compiler warning.
4289 19. I had forgotten to lock out "/../" in configuration file names when
4290 ALT_CONFIG_PREFIX was set.
4292 20. Routers used for verification do not need to specify transports. However,
4293 if such a router generated a host list, and callout was configured, Exim
4294 crashed, because it could not find a port number from the (non-existent)
4295 transport. It now assumes port 25 in this circumstance.
4297 21. Added the -t option to exigrep.
4299 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4300 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4301 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4302 them is set, LOOKUP_LSEARCH is forced.
4304 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4306 24. Added sender and host information to the "rejected by local_scan()" log
4307 line; previously there was no indication of these.
4309 25. Added .include_if_exists.
4311 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4312 Linux. It turns out that not all file systems support this. Apparently some
4313 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4314 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4315 not supported on the file descriptor, is now ignored when Exim is trying to
4316 sync a directory. This applies only to Linux.
4318 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4320 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4321 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4324 29. Added support for maildirsize files from supplied patch (modified a bit).
4326 30. The use of :fail: followed by an empty string could lead Exim to respond to
4327 sender verification failures with (e.g.):
4329 550 Verification failed for <xxx>
4330 550 Sender verify failed
4332 where the first response line was missing the '-' that indicates it is not
4333 the final line of the response.
4335 31. The loop for finding the name of the user that called Exim had a hardwired
4336 limit of 10; it now uses the value of finduser_retries, which is used for
4337 all other user lookups.
4339 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4342 33. Exim was neglecting to zero errno before one call of strtol() when
4343 expanding a string and expecting an integer value. On some systems this
4344 resulted in spurious "integer overflow" errors. Also, it was casting the
4345 result into an int without checking.
4347 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4348 did not work. The code looks as if it has *never* worked, though it appears
4349 to have been documented since at least releast 1.62. I have made it work.
4351 35. The "timeout_DNS" error in retry rules, also documented since at least
4352 1.62, also never worked. As it isn't clear exactly what this means, and
4353 clearly it isn't a major issue, I have abolished the feature by treating it
4354 as "timeout", and writing a warning to the main and panic logs.
4356 36. The display of retry rules for -brt wasn't always showing the error code
4359 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4360 timeout_connect_A, timeout_connect_MX.
4362 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4363 to the empty sender.
4365 39. The daemon was not analysing the content of -oX till after it had closed
4366 stderr and disconnected from the controlling terminal. This meant that any
4367 syntax errors were only noted on the panic log, and the return code from
4368 the command was 0. By re-arranging the code a little, I've made the
4369 decoding happen first, so such errors now appear on stderr, and the return
4370 code is 1. However, the actual setting up of the sockets still happens in
4371 the disconnected process, so errors there are still only recorded on the
4374 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4375 connections (as happens on some IP stacks) was logged at start up time as
4376 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4377 it from "IPv6 and IPv4", which means that two separate sockets are being
4380 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4381 says whether AF_INET or AF_INET6 was passed as an argument.
4383 42. Exiwhat output was messed up when time zones were included in log
4386 43. Exiwhat now gives more information about the daemon's listening ports,
4387 and whether -tls-on-connect was used.
4389 44. The "port" option of the smtp transport is now expanded.
4391 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4392 silently ignored. Now an error message is written to the main and panic
4395 46. There's a new ACL modifier called "logwrite" which writes to a log file
4396 as soon as it is encountered.
4398 47. Added $local_user_uid and $local_user_gid at routing time.
4400 48. Exim crashed when trying to verify a sender address that was being
4403 49. Exim was recognizing only a space character after ".include". It now also
4404 recognizes a tab character.
4406 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4407 extracting the relevant information from the specification. The man page no
4408 longer contains scrambled data for the -d option, and I've added a section
4409 at the front about calling Exim under different names.
4411 51. Added "extra_headers" argument to the "mail" command in filter files.
4413 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4416 53. Installed eximstats 1.29.
4418 54. Added transport_filter_timeout as a generic transport option.
4420 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4421 Cc: header lines. This was required by RFC 822, but it not required by RFC
4424 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4425 incoming messages that did not have them. Now it does so only if the
4426 message originates locally, that is, if there is no associated remote host
4427 address. When Resent- header lines are present, this applies to the Resent-
4428 lines rather than the non-Resent- lines.
4430 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4431 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4433 58. Messages for configuration errors now include the name of the main
4434 configuration file - useful now that there may be more than one file in a
4435 list (.included file names were always shown).
4437 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4438 for those rare installations that do not start the daemon as root or run it
4439 setuid root. I've cut out the call to initgroups() if the daemon is not
4442 60. The Exim user and group can now be bound into the binary as text strings
4443 that are looked up at the start of Exim's processing.
4445 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4447 62. Added $mailstore_basename variable.
4449 63. Installed patch to sieve.c from Michael Haardt.
4451 64. When Exim failed to open the panic log after failing to open the main log,
4452 the original message it was trying to log was written to stderr and debug
4453 output, but if they were not available (the usual case in production), it
4454 was lost. Now it is written to syslog before the two lines that record the
4455 failures to open the logs.
4457 65. Users' Exim filters run in subprocesses under the user's uid. It is
4458 possible for a "deliver" command or an alias in a "personal" command to
4459 provoke an address rewrite. If logging of address rewriting is configured,
4460 this fails because the process is not running as root or exim. There may be
4461 a better way of dealing with this, but for the moment (because 4.30 needs
4462 to be released), I have disabled address rewrite logging when running a
4463 filter in a non-root, non-exim process.
4469 1. The buildconfig auxiliary program wasn't quoting the value set for
4470 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4471 not defined. This bug was masked in 4.22 by the effect that was fixed in
4474 2. Some messages that were rejected after a message id was allocated were
4475 shown as "incomplete" by exigrep. It no longer does this for messages that
4476 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4478 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4479 have allow_domain_literals set, the ID did not get logged in the <= line.
4480 Domain literals are now always recognized in Message-ID: header lines.
4482 4. The first argument for a ${extract expansion item is the key name or field
4483 number. Leading and trailing spaces in this item were not being ignored,
4484 causing some misleading effects.
4486 5. When deliver_drop_privilege was set, single queue runner processes started
4487 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4488 same command in the process it spins off) were not dropping privilege.
4490 6. When the daemon running as "exim" started a queue runner, it always
4491 re-executed Exim in the spun-off process. This is a waste of effort when
4492 deliver_drop_privilege is set. The new process now just calls the
4493 queue-runner function directly.
4499 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4502 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4503 ignored. Though the use of -oP was forcing the writing of a pid file, it
4504 was always written to the default place.
4506 3. If the message "no IP address found for host xxxx" is generated during
4507 incoming verification, it is now followed by identification of the incoming
4508 connection (so you can more easily find what provoked it).
4510 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4512 5. Added some features to "harden" Exim a bit more against certain attacks:
4514 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4515 be put in Local/Makefile. This is like the never_users runtime option,
4516 but it cannot be overridden. The default setting is "root".
4518 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4519 prefix string with which any file named in a -C command line option
4522 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4523 is retained for -C and -D only if the caller of Exim is root. Without
4524 it, the exim user may also use -C and -D and retain privilege.
4526 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4527 command line option is disabled.
4529 6. Macro names set by the -D option must start with an upper case letter, just
4530 like macro names defined in the configuration file.
4532 7. Added "dereference=" facility to LDAP.
4534 8. Two instances of the typo "uknown" in the source files are fixed.
4536 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4537 the Configure-Makefile script screwed up while processing it.
4539 10. Incorporated PCRE 4.4.
4541 11. The SMTP synchronization check was not operating right at the start of an
4542 SMTP session. For example, it could not catch a HELO sent before the client
4543 waited for the greeting. There is now a check for outstanding input at the
4544 point when the greeting is written. Because of the duplex, asynchronous
4545 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4546 way, but not yet received, when the check is performed.
4548 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4549 on TCP/IP sockets, because this apparently causes some broken clients to
4552 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4553 unchanged) from the Cygwin maintainer.
4555 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4556 was supported instead of testing for mbx. Effectively a typo.
4558 15. The spa authenticator server code was not checking that the input it
4559 received was valid base64.
4561 16. The debug output line for the "set" modifier in ACLs was not showing the
4562 name of the variable that was being set.
4564 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4566 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4567 lookup on its own. Something else was needed to trigger the lookup. For
4568 example, a match in host_lookup or the need for a host name in a host list.
4569 Now, if $sender_host_name is referenced and the host name has not yet been
4570 looked up, a lookup is performed. If the lookup fails, the variable remains
4571 empty, and $host_lookup_failed is set to "1".
4573 19. Added "eqi" as a case-independent comparison operator.
4575 20. The saslauthd authentication condition could segfault if neither service
4576 nor realm was specified.
4578 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4579 error message that was logged was misleading, and incoming SMTP
4580 connections were dropped. The message is now more accurate, and temporary
4581 errors are given to SMTP connections.
4583 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4584 (except RSET) with a 421 error, until QUIT is received. However, it was
4585 failing to send a response to QUIT.
4587 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4588 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4589 ACL is now run after the helo_try_verify_hosts code.
4591 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4592 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4593 case-independent, so other case variants are also recognized). Apparently
4594 some systems use these upper case variants.
4596 25. If more than two messages were waiting for the same host, and a transport
4597 filter was specified for the transport, Exim sent two messages over the
4598 same TCP/IP connection, and then failed with "socket operation on non-
4599 socket" when it tried to send the third.
4601 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4603 27. The extern definition of crypt16() in expand.c was not being excluded when
4604 the OS had its own crypt16() function.
4606 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4607 as a preferred synonym for return_size_limit, both as an option and as an
4610 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4612 30. Changed the default configuration ACL to relax the local part checking rule
4613 for addresses that are not in any local domains. For these addresses,
4614 slashes and pipe symbols are allowed within local parts, but the sequence
4615 /../ is explicitly forbidden.
4617 31. SPA server authentication was not clearing the challenge buffer before
4620 32. log_message in a "warn" ACL statement was writing to the reject log as
4621 well as to the main log, which contradicts the documentation and doesn't
4622 seem right (because no rejection is happening). So I have stopped it.
4624 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4625 However, I am unable to do any testing of this.
4627 34. Fixed an infelicity in the appendfile transport. When checking directories
4628 for a mailbox, to see if any needed to be created, it was accidentally
4629 using path names with one or more superfluous leading slashes; tracing
4630 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4632 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4633 contents are added to the log line that is written for every discarded
4634 recipient. (Previously a log_message setting was ignored.)
4636 36. The ${quote: operator now quotes the string if it is empty.
4638 37. The install script runs exim in order to find its version number. If for
4639 some reason other than non-existence or emptiness, which it checks, it
4640 could not run './exim', it was installing it with an empty version number,
4641 i.e. as "exim-". This error state is now caught, and the installation is
4644 38. An argument was missing from the function that creates an error message
4645 when Exim fails to connect to the socket for saslauthd authentication.
4646 This could cause Exim to crash, or give a corrupted message.
4648 39. Added isip, isip4, and isip6 to ${if conditions.
4650 40. The ACL variables $acl_xx are now saved with the message, and can be
4651 accessed later in routers, transports, and filters.
4653 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4654 strings in the file are not string-expanded.
4656 42. If a MAIL command specified a SIZE value that was too large to fit into an
4657 int variable, the check against message_size_limit failed. Such values are
4658 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4659 day this will have to be increased, but I don't think I want to be around
4660 when emails are that large.
4667 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4668 iconv() is not standard in FreeBSD.
4670 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4671 IPv6 enabled. The observed symptom was a segmentation fault on return from
4672 the function os_common_find_running_interfaces() in src/os.c.
4674 3. In the check_special_case() function in daemon.c I had used "errno" as an
4675 argument name, which causes warnings on some systems. This was basically a
4676 typo, since it was named "eno" in the comments!
4678 4. The code that waits for the clock to tick (at a resolution of some fraction
4679 of a second) so as to ensure message-id uniqueness was always waiting for
4680 at least one whole tick, when it could have waited for less. [This is
4681 almost certainly not relevant at current processor speeds, where it is
4682 unlikely to ever wait at all. But we try to future-proof.]
4684 5. The function that sleeps for a time interval that includes fractions of a
4685 second contained a race. It did not block SIGALRM between setting the
4686 timer, and suspending (a couple of lines later). If the interval was short
4687 and the sigsuspend() was delayed until after it had expired, the suspension
4688 never ended. On busy systems this could lead to processes getting stuck for
4691 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4692 process, before it forks any delivery processes. The open lookup caching
4693 mechanism meant that the open file or database connection was passed into
4694 the delivery process. The problem was that delivery processes always tidy
4695 up cached lookup data. This could cause a problem for the next delivery
4696 process started by the queue runner, because the external queue runner
4697 process does not know about the closure. So the next delivery process
4698 still has data in the lookup cache. In the case of a file lookup, there was
4699 no problem because closing a file descriptor in a subprocess doesn't affect
4700 the parent. However, if the lookup was caching a connection to a database,
4701 the connection was closed, and the second delivery process was likely to
4702 see errors such as "PGSQL: query failed: server closed the connection
4703 unexpectedly". The problem has been fixed by closing all cached lookups
4704 in a queue runner before running a delivery process.
4706 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4707 seem to have the "const" qualifier which it has on other OS. I've
4710 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4711 *of the same type* (client or server) with the same public name that an
4712 error should be diagnosed.
4714 9. When Exim looked up a host name for an IP address, but failed to find the
4715 original IP address when looking up the host name (a safety check), it
4716 output the message "<ip address> does not match any IP for NULL", which was
4717 confusing, to say the least. The bug was that the host name should have
4718 appeared instead of "NULL".
4720 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4721 user that is built into the binary, and the -C or -D options is used, root
4722 privilege is dropped before the configuration file is read. In addition,
4723 logging is switched to stderr instead of the normal log files. If the
4724 configuration then re-defines the Exim user, the unprivileged environment
4725 is probably not what is expected, so Exim logs a panic warning message (but
4728 However, if deliver_drop_privilege is set, the unprivileged state may well
4729 be exactly what is intended, so the warning has been cut out in that case,
4730 and Exim is allowed to try to write to its normal log files.
4736 1. smtp_return_error_details was not giving details for temporary sender
4737 or receiver verification errors.
4739 2. Diagnose a configuration error if two authenticators have the same public
4742 3. Exim used not to create the message log file for a message until the first
4743 delivery attempt. This could be confusing when incoming messages were held
4744 for policy or load reasons. The message log file is now created at the time
4745 the message is received, and an initial "Received" line is written to it.
4747 4. The automatically generated man page for command line options had a minor
4748 bug that caused no ill effects; however, a more serious problem was that
4749 the procedure for building the man page automatically didn't always
4750 operate. Consequently, release 4.20 contains an out-of-date version. This
4751 shouldn't happen again.
4753 5. When building Exim with embedded Perl support, the script that builds the
4754 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4755 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4757 6. The freeze_tell option was not being used for messages that were frozen on
4758 arrival, either by an ACL or by local_scan().
4760 7. Added the smtp_incomplete_transaction log selector.
4762 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4763 was accepting AUTH without a new EHLO.
4765 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4766 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4769 10. Logging of TCP/IP connections (when configured) now happens in the main
4770 daemon process instead of the child process, so that the TCP/IP connection
4771 count is more accurate (but it can never be perfect).
4773 11. The use of "drop" in a nested ACL was not being handled correctly in the
4774 outer ACL. Now, if condition failure induced by the nested "drop" causes
4775 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4776 or "require"), the connection is dropped.
4778 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4779 that yield "discard" can now be used with an "accept" or a "discard" verb,
4780 but an error is generated for any others (because I can't see a useful way
4781 to define what should happen).
4783 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4784 are now processed in the same way as lines in the Exim configuration file.
4785 In particular, continuation lines are supported.
4787 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4789 15. Added -ti meaning -t -i.
4791 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4792 domains, and warn by logging if others are found.
4794 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4795 returned from GIFCONF when Exim is trying to find the list of interfaces on
4796 a host. The code in os.c has been modified to copy each ifreq to an aligned
4797 structure in all cases.
4799 Also, in some cases, the returned ifreq's were being copied to a 'struct
4800 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4801 means the last couple of bytes of an IPv6 address could be chopped if the
4802 ifreq contained only a normal sockaddr (14 bytes storage).
4804 18. Named domain lists were not supported in the hosts_treat_as_local option.
4805 An entry such as +xxxx was not recognized, and was treated as a literal
4808 19. Ensure that header lines added by a DATA ACL are included in the reject log
4809 if the ACL subsequently rejects the message.
4811 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4812 MD5 (which is deprecated).
4814 21. When testing a filter file using -bf, Exim was writing a message when it
4815 took the sender from a "From " line in the message, but it was not doing so
4816 when it took $return_path from a Return-Path: header line. It now does.
4818 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4819 with a valid header line field name (a series of printing characters
4820 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4822 23. Changed "disc" in the source to "disk" to conform to the documentation and
4823 the book and for uniformity.
4825 24. Ignore Sendmail's -Ooption=value command line item.
4827 25. When execve() failed while trying to run a command in a pipe transport,
4828 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4829 could be confused with a return value of 69 from the command itself. This
4830 has been changed to 127, the value the shell returns if it is asked to run
4831 a non-existent command. The wording for the related log line suggests a
4832 non-existent command as the problem.
4834 26. If received_header_text expands to an empty string, do not add a Received:
4835 header line to the message. (Well, it adds a token one on the spool, but
4836 marks it "old" so that it doesn't get used or transmitted.)
4838 27. Installed eximstats 1.28 (addition of -nt option).
4840 28. There was no check for failure on the call to getsockname() in the daemon
4841 code. This can fail if there is a shortage of resources on the system, with
4842 ENOMEM, for example. A temporary error is now given on failure.
4844 29. Contrary to the C standard, it seems that in some environments, the
4845 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4846 program. Exim now does this explicitly; it affects the formatting of
4847 timestamps using strftime().
4849 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4850 complaints. I've now initialized all the variables, to avoid this.
4852 32. Header lines added by a system filter were not being "seen" during
4853 transport-time rewrites.
4855 33. The info_callback() function passed to OpenSSL is set up with type void
4856 (*)(SSL *, int, int), as described somewhere. However, when calling the
4857 function (actually a macro) that sets it up, the type void(*)() is
4858 expected. I've put in a cast to prevent warnings from picky compilers.
4860 34. If a DNS black list lookup found a CNAME record, but there were no A
4861 records associated with the domain it pointed at, Exim crashed.
4863 35. If a DNS black list lookup returned more than one A record, Exim ignored
4864 all but the first. It now scans all returned addresses if a particular IP
4865 value is being sought. In this situation, the contents of the
4866 $dnslist_value variable are a list of all the addresses, separated by a
4869 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4870 to accept a host name and all its aliases if the forward lookup for any of
4871 them yielded the IP address of the incoming connection. Now it accepts only
4872 those names whose forward lookup yields the correct IP address. Any other
4873 names are discarded. This closes a loophole whereby a rogue DNS
4874 administrator could create reverse DNS records to break through a
4875 wildcarded host restriction in an ACL.
4877 37. If a user filter or a system filter that ran in a subprocess used any of
4878 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4879 the wrong values were passed to the pipe command ($thisaddress had the
4880 value of $0, $0 had the value of $1, etc). This bug was introduced by
4881 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4883 38. Improved the line breaking for long SMTP error messages from ACLs.
4884 Previously, if there was no break point between 40 and 75 characters, Exim
4885 left the rest of the message alone. Two changes have been made: (a) I've
4886 reduced the minimum length to 35 characters; (b) if it can't find a break
4887 point between 35 and 75 characters, it looks ahead and uses the first one
4888 that it finds. This may give the occasional overlong line, but at least the
4889 remaining text gets split now.
4891 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4892 file descriptors might be low, and that setting 1000 would always raise it.
4893 It turns out that in some environments, the limit is already over 1000 and
4894 that lowering it causes trouble. So now Exim takes care not to decrease it.
4896 40. When delivering a message, the value of $return_path is set to $sender_
4897 address at the start of routing (routers may change the value). By an
4898 oversight, this default was not being set up when an address was tested by
4899 -bt or -bv, which affected the outcome if any router or filter referred to
4902 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4903 log only when "message" or "log_message" are set. However, if one of the
4904 conditions was an address verification, or a call to a nested ACL, the
4905 messages generated by the underlying test were being passed through. This
4906 no longer happens. The underlying message is available in $acl_verify_
4907 message for both "message" and "log_message" expansions, so it can be
4908 passed through if needed.
4910 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4911 new expansion $bh_ to give the encoded byte string without charset
4912 translation. Translation happens only if iconv() is available; HAVE_ICONV
4913 indicates this at build time. HEADERS_CHARSET gives the charset to
4914 translate to; headers_charset can change it in the configuration, and
4915 "headers charset" can change it in an individual filter file.
4917 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4918 that creates RFC 2047 encoded "words" labels them as that charset instead
4919 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4920 expansion operator; (ii) when Exim creates a From: line for a local
4921 message; (iii) when a header line is rewritten to include a "phrase" part.
4923 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4924 buggy, causing it to skip the first lines of messages whose message ID
4925 ended in 'D'. This would not have bitten before Exim release 4.14, because
4926 message IDs were unlikely to end in 'D' before then. The effect was to have
4927 incorrect size information for certain domains.
4929 45. #include "config.h" was missing at the start of the crypt16.c module. This
4930 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4933 46. If there was a timeout during a "random" callout check, Exim treated it as
4934 a failure of the random address, and carried on sending RSET and the real
4935 address. If the delay was just some slowness somewhere, the response to the
4936 original RCPT would be taken as a response to RSET and so on, causing
4937 mayhem of various kinds.
4939 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4940 when I implemented it. It didn't allow for the fact that some option values
4941 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4942 the right test for positive values.
4944 48. Domain names in DNS records are case-independent. Exim always looks them up
4945 in lower case. Some resolvers return domain names in exactly the case they
4946 appear in the zone file, that is, they may contain uppercase letters. Not
4947 all resolvers do this - some return always lower case. Exim was treating a
4948 change of case by a resolver as a change of domain, similar to a widening
4949 of a domain abbreviation. This triggered its re-routing code and so it was
4950 trying to route what was effectively the same domain again. This normally
4951 caused routing to fail (because the router wouldn't handle the domain
4952 twice). Now Exim checks for this case specially, and just changes the
4953 casing of the domain that it ultimately uses when it transmits the message
4956 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4959 50. If a filter generated a file delivery with a non-absolute name (possible if
4960 no home directory exists for the router), the forbid_file option was not
4963 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4964 the existing equality matching.
4966 52. Exim was using ints instead of ino_t variables in some places where it was
4967 dealing with inode numbers.
4969 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4970 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4971 called TMPDIR, and if it finds it is different, it changes its value.
4973 54. The smtp_printf() function is now made available to local_scan() so
4974 additional output lines can be written before returning. There is also an
4975 smtp_fflush() function to enable the detection of a dropped connection.
4976 The variables smtp_input and smtp_batched_input are exported to
4979 55. Changed the default runtime configuration: the message "Unknown user"
4980 has been removed from the ACL, and instead placed on the localuser router,
4981 using the cannot_route_message feature. This means that any verification
4982 failures that generate their own messages won't get overridden. Similarly,
4983 the "Unrouteable address" message that was in the ACL for unverifiable
4984 relay addresses has also been removed.
4986 56. Added hosts_avoid_esmtp to the smtp transport.
4988 57. The exicyclog script was not checking for the esoteric option
4989 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4990 will work only if exicyclog is run under the appropriate euid.
4992 58. Following a discussion on the list, the rules by which Exim recognises line
4993 endings on incoming messages have been changed. The -dropcr and drop_cr
4994 options are now no-ops, retained only for backwards compatibility. The
4995 following line terminators are recognized: LF CRLF CR. However, special
4996 processing applies to CR:
4998 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4999 nor a local message in the state where . is a terminator.
5001 (ii) If a bare CR is encountered in a header line, an extra space is added
5002 after the line terminator so as not to end the header. The reasoning
5003 behind this is that bare CRs in header lines are most likely either
5004 to be mistakes, or people trying to play silly games.
5006 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5007 was being incorrectly given as 18 bytes larger than it should have been.
5008 This is a VOB (very old bug).
5010 60. This may never have affected anything current, but just in case it has:
5011 When the local host is found other than at the start of a list of hosts,
5012 the local host, those with the same MX, and any that follow, are discarded.
5013 When the list in question was part of a longer list of hosts, the following
5014 hosts (not currently being processed) were also being discarded. This no
5015 longer happens. I'm not sure if this situation could ever has previously
5018 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5021 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5022 header. This is something that is recommended in a new Internet Draft, and
5023 is something that is documented as being done by Sendmail. There are two
5024 possible values. For messages generated by the autoreply transport, Exim
5027 Auto-Submitted: auto-replied
5029 whereas for all other generated messages (e.g. bounces) it adds
5031 Auto-Submitted: auto-generated
5033 63. The "personal" condition in filters now includes a test for the
5034 Auto-Submitted: header. If it contains the string "auto-" the message it
5035 not considered personal.
5037 64. Added rcpt_include_affixes as a generic transport option.
5039 65. Added queue_only_override (default true).
5041 66. Added the syslog_duplication option.
5043 67. If what should have been the first header line of a message consisted of
5044 a space followed by a colon, Exim was mis-interpreting it as a header line.
5045 It isn't of course - it is syntactically invalid and should therefore be
5046 treated as the start of the message body. The misbehaviour could have
5047 caused a number of strange effects, including loss of data in subsequent
5048 header lines, and spool format errors.
5050 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5051 client host had authenticated. This control can now be exercised by an ACL
5052 for more flexibility.
5054 69. By default, callouts do not happen when testing with -bh. There is now a
5055 variant, -bhc, which does actually run the callout code, including
5056 consulting and updating the callout cache.
5058 70. Added support for saslauthd authentication, courtesy of Alexander
5061 71. If statvfs() failed on the spool or log directories while checking their
5062 size for availability, Exim confusingly gave the error "space shortage".
5063 Furthermore, in debugging mode it crashed with a floating point exception.
5064 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5065 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5066 serious problem, Exim now writes to the main and panic logs when this
5067 happens, with details of the failure. It then refuses to accept the
5068 incoming message, giving the message "spool directory problem" or "log
5069 directory problem" with a 421 code for SMTP messages.
5071 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5072 0, 1, and 2 exist, because some OS complain for execs without them (see
5073 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5074 descriptors. However, the code omitted to check that the open succeeded,
5075 causing mysterious errors if for some reason the permissions on /dev/null
5076 got screwed. Now Exim writes a message to the main and panic logs, and
5077 bombs out if it can't open /dev/null.
5079 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5080 interact so that it is all more flexible. It is supposed to remain
5081 backwards compatible. Also added extra_local_interfaces.
5083 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5084 to bomb out with an assertion failure - to the client this appears as a
5085 connection drop. This problem occurs in the part of the code that was taken
5086 from the Samba project. Fortunately, the assertion is in a very simple
5087 function, so I have fixed this by reproducing the function inline in the
5088 one place where it is called, and arranging for authentication to fail
5089 instead of killing the process with assert().
5091 75. The SPA client code was not working when the server requested OEM rather
5092 than Unicode encoding.
5094 76. Added code to make require_files with a specific uid setting more usable in
5095 the case where statting the file as root fails - usually a non-root-mounted
5096 NFS file system. When this happens and the failure is EACCES, Exim now
5097 forks a subprocess and does the per-uid checking as the relevant uid.
5099 77. Added process_log_path.
5101 78. If log_file_path was not explicitly set, a setting of check_log_space or
5102 check_log_inodes was ignored.
5104 79. If a space check for the spool or log partitions fails, the incident is now
5105 logged. Of course, in the latter case the data may get lost...
5107 80. Added the %p formatting code to string_format() so that it can be used to
5108 print addresses in debug_print(). Adjusted all the address printing in the
5109 debugging in store.c to use %p rather than %d.
5111 81. There was a concern that a line of code in smtp_in.c could overflow a
5112 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5113 initially expressed, the concern was not well-founded, because trailing
5114 spaces are removed early. However, if the trailing spaces were followed by
5115 a NULL, they did not get removed, so the overflow was possible. Two fixes
5118 (a) I re-wrote the offending code in a cleaner fashion.
5119 (b) If an incoming SMTP command contains a NULL character, it is rejected
5122 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5123 runs initgroups(), so that if the Exim user is in any additional groups,
5124 they will be used during message reception.
5130 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob