1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.622 2010/06/05 23:50:18 pdp Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
8 PP/01 Date: & Message-Id: revert to normally being appended to a message,
9 only prepend for the Resent-* case. Fixes regression introduced in
10 Exim 4.70 by NM/22 for Bugzilla 607.
12 PP/02 Include check_rfc2047_length in configure.default because we're seeing
13 increasing numbers of administrators be bitten by this.
15 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
17 PP/03 Bugzilla 994: added openssl_options main configuration option.
19 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
21 PP/05 Bugzilla 834: provide a permit_codedump option for pipe transports.
23 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
25 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
26 without a peer certificate (I believe), leading to a segfault because of
27 an assumption that peers always have certificates. Be a little more
28 paranoid. Problem reported by Martin Tscholak.
30 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
31 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
32 NB: ClamAV planning to remove STREAM in "middle of 2010".
34 PP/09 Implemented reverse_ip expansion operator.
40 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
41 $data_path, and $header_path variables; fixed documentation bugs and
44 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
45 exipick to access non-standard spools, including the "frozen" queue
48 NM/01 Bugzilla 965: Support mysql stored procedures.
49 Patch from Alain Williams
51 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
53 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
54 Patch from Andreas Metzler
56 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
57 Patch from Kirill Miazine
59 NM/05 Bugzilla 671: Added umask to procmail example.
61 JJ/03 installed exipick 20100323.0, fixing doc bug
63 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
64 directory. Notification and patch from Dan Rosenberg.
66 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
68 TK/02 Improve log output when DKIM signing operation fails.
70 MH/01 Treat the transport option dkim_domain as a colon separated
71 list, not as a single string, and sign the message with each element,
72 omitting multiple occurences of the same signer.
74 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
75 Bugzilla 985, 986. Patch by Simon Arlott
77 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
80 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
81 MBX locking. Notification from Dan Rosenberg.
87 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
89 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
91 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
93 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
95 NM/04 Bugzilla 915: Flag broken perl installation during build.
101 TK/01 Added patch by Johannes Berg that expands the main option
102 "spamd_address" if it starts with a dollar sign.
104 TK/02 Write list of recipients to X-Envelope-Sender header when building
105 the mbox-format spool file for content scanning (suggested by Jakob
108 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
109 (http://www.dcc-servers.net/) support via dccifd. Activated by
110 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
112 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
113 by Mark Daniel Reidel <mr@df.eu>.
115 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
116 When building exim an external PCRE library is now needed -
117 PCRE is a system library on the majority of modern systems.
118 See entry on PCRE_LIBS in EDITME file.
120 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
121 conversation. Added nologin parameter to request.
122 Patch contributed by Kirill Miazine
124 TF/01 Do not log submission mode rewrites if they do not change the address.
126 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
128 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
129 log files in place. Contributed by Roberto Lima
131 NM/04 Bugzilla 667: close socket used by dovecot authenticator
133 TF/03 Bugzilla 615: When checking the local_parts router precondition
134 after a local_part_suffix or local_part_prefix option, Exim now
135 does not use the address's named list lookup cache, since this
136 contains cached lookups for the whole local part.
138 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
139 Robert Millan. Documentation is in experimental-spec.txt
141 TF/04 Bugzilla 668: Fix parallel build (make -j).
143 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
145 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
146 Patch provided by Jan Srzednicki
148 TF/05 Leading white space used to be stripped from $spam_report which
149 wrecked the formatting. Now it is preserved.
151 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
152 that they are available at delivery time.
154 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
156 TF/08 TLS error reporting now respects the incoming_interface and
157 incoming_port log selectors.
159 TF/09 Produce a more useful error message if an SMTP transport's hosts
160 setting expands to an empty string.
162 NM/06 Bugzilla 744: EXPN did not work under TLS.
163 Patch provided by Phil Pennock
165 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
166 Patch provided by Richard Godbee
168 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
169 acl_smtp_notquit, added index entry.
171 NM/09 Bugzilla 787: Potential buffer overflow in string_format
172 Patch provided by Eugene Bujak
174 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
175 Patch provided by Maxim Dounin
177 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
178 Patch provided by Phil Pennock
180 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
182 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
183 Patch provided by Brad "anomie" Jorsch
185 NM/14 Bugzilla 622: Added timeout setting to transport filter.
186 Patch provided by Dean Brooks
188 TK/05 Add native DKIM support (does not depend on external libraries).
190 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
191 Patch provided by Graeme Fowler
193 NM/16 Bugzilla 851: Documentation example syntax fix.
195 NM/17 Changed NOTICE file to remove references to embedded PCRE.
197 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
199 NM/19 Bugzilla 745: TLS version reporting
200 Patch provided by Phil Pennock
202 NM/20 Bugzilla 167: bool: condition support
203 Patch provided by Phil Pennock
205 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
206 Patch provided by Phil Pennock
208 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
209 Patch provided by Brad "anomie" Jorsch
211 NM/23 Bugzilla 687: Fix misparses in eximstats
212 Patch provided by Heiko Schlittermann
214 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
215 Patch provided by Heiko Schlittermann
217 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
218 plus update to original patch.
220 NM/26 Bugzilla 799: Documentation correction for ratelimit
222 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
223 Patch provided by David Brownlee
225 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
227 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
229 NM/30 Bugzilla 888: TLS documentation bugfixes
231 NM/31 Bugzilla 896: Dovecot buffer overrun fix
233 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
234 Unlike the original bugzilla I have changed all shell scripts in src tree
236 NM/33 Bugzilla 898: Transport filter timeout fix
237 Patch by Todd Rinaldo
239 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
240 Patch by Serge Demonchaux
242 NM/35 Bugzilla 39: Base64 decode bug fixes
243 Patch by Jakob Hirsch
245 NM/36 Bugzilla 909: Correct connect() call in dcc code
247 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
249 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
251 NM/39 Bugzilla 911: Fixed MakeLinks build script
257 TK/01 Add preliminary DKIM support. Currently requires a forked version of
258 ALT-N's libdkim that I have put here:
259 http://duncanthrax.net/exim-experimental/
261 Note to Michael Haardt: I had to rename some vars in sieve.c. They
262 were called 'true' and it seems that C99 defines that as a reserved
263 keyword to be used with 'bool' variable types. That means you could
264 not include C99-style headers which use bools without triggering
265 build errors in sieve.c.
267 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
268 as mailq or other aliases. Changed the --help handling significantly
269 to do whats expected. exim_usage() emits usage/help information.
271 SC/01 Added the -bylocaldomain option to eximstats.
273 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
275 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
277 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
283 PH/01 Another patch from the Sieve maintainer.
285 PH/02 When an IPv6 address is converted to a string for single-key lookup
286 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
287 dots are used instead of colons so that keys in lsearch files need not
288 contain colons. This was done some time before quoting was made available
289 in lsearch files. However, iplsearch files do require colons in IPv6 keys
290 (notated using the quote facility) so as to distinguish them from IPv4
291 keys. This meant that lookups for IP addresses in host lists did not work
292 for iplsearch lookups.
294 This has been fixed by arranging for IPv6 addresses to be expressed with
295 colons if the lookup type is iplsearch. This is not incompatible, because
296 previously such lookups could never work.
298 The situation is now rather anomolous, since one *can* have colons in
299 ordinary lsearch keys. However, making the change in all cases is
300 incompatible and would probably break a number of configurations.
302 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
305 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
306 conversion specification without a maximum field width, thereby enabling
307 a rogue spamd server to cause a buffer overflow. While nobody in their
308 right mind would setup Exim to query an untrusted spamd server, an
309 attacker that gains access to a server running spamd could potentially
310 exploit this vulnerability to run arbitrary code as the Exim user.
312 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
313 $primary_hostname instead of what libspf2 thinks the hosts name is.
315 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
316 a directory entry by the name of the lookup key. Previously, if a
317 symlink pointed to a non-existing file or a file in a directory that
318 Exim lacked permissions to read, a lookup for a key matching that
319 symlink would fail. Now it is enough that a matching directory entry
320 exists, symlink or not. (Bugzilla 503.)
322 PH/03 The body_linecount and body_zerocount variables are now exported in the
325 PH/04 Added the $dnslist_matched variable.
327 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
328 This means they are set thereafter only if the connection becomes
331 PH/06 Added the client_condition to authenticators so that some can be skipped
332 by clients under certain conditions.
334 PH/07 The error message for a badly-placed control=no_multiline_responses left
335 "_responses" off the end of the name.
337 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
339 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
340 (without spaces) instead of just copying the configuration text.
342 PH/10 Added the /noupdate option to the ratelimit ACL condition.
344 PH/11 Added $max_received_linelength.
346 PH/12 Added +ignore_defer and +include_defer to host lists.
348 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
349 way in which PCRE > 7.0 is built.
351 PH/14 Implemented queue_only_load_latch.
353 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
354 MAIL command. The effect was to mangle the value on 64-bit systems.
356 PH/16 Another patch from the Sieve maintainer.
358 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
360 PH/18 If a system quota error occurred while trying to create the file for
361 a maildir delivery, the message "Mailbox is full" was not appended to the
362 bounce if the delivery eventually timed out. Change 4.67/27 below applied
363 only to a quota excession during the actual writing of the file.
365 PH/19 It seems that peer DN values may contain newlines (and other non-printing
366 characters?) which causes problems in log lines. The DN values are now
367 passed through string_printing() before being added to log lines.
369 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
370 and InterBase are left for another time.)
372 PH/21 Added message_body_newlines option.
374 PH/22 Guard against possible overflow in moan_check_errorcopy().
376 PH/23 POSIX allows open() to be a macro; guard against that.
378 PH/24 If the recipient of an error message contained an @ in the local part
379 (suitably quoted, of course), incorrect values were put in $domain and
380 $local_part during the evaluation of errors_copy.
386 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
387 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
390 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
391 issue a MAIL command.
393 PH/02 In an ACL statement such as
395 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
397 if a client was not listed at all, or was listed with a value other than
398 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
399 the condition was not true (as it should be), so access was not denied.
400 The bug was that the ! inversion was incorrectly passed on to the second
401 item. This has been fixed.
403 PH/03 Added additional dnslists conditions == and =& which are different from
404 = and & when the dns lookup returns more than one IP address.
406 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
407 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
409 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
410 FSYNC, which compiles an option called disable_fsync that allows for
411 bypassing fsync(). The documentation is heavily laced with warnings.
413 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
415 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
416 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
417 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
418 including adding "make clean"; (3) Added -fPIC when compiling the test
419 dynamically loaded module, to get rid of a warning.
421 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
422 message fails, move_frozen_messages = true and ignore_bounce_errors_after
423 = 0s. The bug is otherwise harmless.
425 PH/07 There was a bug in the dovecot authenticator such that the value of
426 $auth1 could be overwritten, and so not correctly preserved, after a
427 successful authentication. This usually meant that the value preserved by
428 the server_setid option was incorrect.
430 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
432 PH/09 Installed PCRE release 7.0.
434 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
435 run for batched SMTP input. It is now run at the start of every message
436 in the batch. While fixing this I discovered that the process information
437 (output by running exiwhat) was not always getting set for -bs and -bS
438 input. This is fixed, and it now also says "batched" for BSMTP.
440 PH/11 Added control=no_pipelining.
442 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
443 patch, slightly modified), and move the expansion of helo_data till after
444 the connection is made in the smtp transport (so it can use these
447 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
449 PH/14 Added log_selector = +pid.
451 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
453 PH/16 Add ${if forany and ${if forall.
455 PH/17 Added dsn_from option to vary the From: line in DSNs.
457 PH/18 Flush SMTP output before performing a callout, unless control =
458 no_callout_flush is set.
460 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
461 was true (the default) a successful delivery failed to delete the retry
462 item, thus causing premature timeout of the address. The bug is now
465 PH/20 Added hosts_avoid_pipelining to the smtp transport.
467 PH/21 Long custom messages for fakedefer and fakereject are now split up
468 into multiline reponses in the same way that messages for "deny" and
469 other ACL rejections are.
471 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
472 with slight modification.
474 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
475 draft, changing the syntax and factoring some duplicate code".
477 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
478 for deliveries of the second and subsequent messages over the same SMTP
481 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
482 ${reduce, with only minor "tidies".
484 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
486 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
487 expansion side effects.
489 PH/27 When a message times out after an over-quota error from an Exim-imposed
490 quota, the bounce message says "mailbox is full". This message was not
491 being given when it was a system quota that was exceeded. It now should
494 MH/03 Made $recipients available in local_scan(). local_scan() already has
495 better access to the recipient list through recipients_list[], but
496 $recipients can be useful in postmaster-provided expansion strings.
498 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
499 in the case of a MAIL command with additional options following the
500 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
501 were accidentally chopped off.
503 PH/29 SMTP synchronization checks are implemented when a command is read -
504 there is a check that no more input is waiting when there shouldn't be
505 any. However, for some commands, a delay in an ACL can mean that it is
506 some time before the response is written. In this time, more input might
507 arrive, invalidly. So now there are extra checks after an ACL has run for
508 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
509 pipelining has not been advertised.
511 PH/30 MH's patch to allow iscntrl() characters to be list separators.
513 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
514 returned in the SMTP response when smtp_return_error_details was false.
517 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
518 instead of the C I/O that was originally supplied, because problems were
521 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
522 Exim which did not show up earlier: it was assuming that a call to
523 SSL_CTX_set_info_callback() might give an error value. In fact, there is
524 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
525 was a macro that became an assignment, so it seemed to work. This has
526 changed to a proper function call with a void return, hence the compile
527 error. Exim's code has been fixed.
529 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
532 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
534 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
536 PH/37 If a message is not accepted after it has had an id assigned (e.g.
537 because it turns out to be too big or there is a timeout) there is no
538 "Completed" line in the log. When some messages of this type were
539 selected by exigrep, they were listed as "not completed". Others were
540 picked up by some special patterns. I have improved the selection
541 criteria to be more general.
543 PH/38 The host_find_failed option in the manualroute router can now be set
544 to "ignore", to completely ignore a host whose IP address cannot be
545 found. If all hosts are ignored, the behaviour is controlled by the new
546 host_all_ignored option.
548 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
549 homing or because of multiple MX records with /mx) generated more than
550 one IP address, and the following item turned out to be the local host,
551 all the secondary addresses of the first item were incorrectly removed
552 from the list, along with the local host and any following hosts (which
553 is what is supposed to happen).
555 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
556 whoever called Exim into the -H file. In the case of the daemon it was
557 behaving confusingly. When first started, it used values for whoever
558 started the daemon, but after a SIGHUP it used the Exim user (because it
559 calls itself on a restart). I have changed the code so that it now always
562 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
563 message are rejected with the same error (e.g. no authentication or bad
564 sender address), and a DATA command is nevertheless sent (as can happen
565 with PIPELINING or a stupid MUA), the error message that was given to the
566 RCPT commands is included in the rejection of the DATA command. This is
567 intended to be helpful for MUAs that show only the final error to their
570 PH/42 Another patch from the Sieve maintainer.
572 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
573 Eximstats - Fixed some broken HTML links and added missing column headers
575 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
576 columns for Rejects, Temp Rejects, Ham, and Spam rows.
578 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
580 PH/43 Yet another patch from the Sieve maintainer.
582 PH/44 I found a way to check for a TCP/IP connection going away before sending
583 the response to the final '.' that terminates a message, but only in the
584 case where the client has not sent further data following the '.'
585 (unfortunately, this is allowed). However, in many cases there won't be
586 any further data because there won't be any more messages to send. A call
587 to select() can be used: if it shows that the input is "ready", there is
588 either input waiting, or the socket has been closed. An attempt to read
589 the next input character can distinguish the two cases. Previously, Exim
590 would have sent an OK response which the client would never have see.
591 This could lead to message repetition. This fix should cure that, at
592 least in a lot of common cases.
594 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
595 advertised in response to EHLO.
601 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
602 fixed by 4.65/MH/01 (is this a record?) are fixed:
604 (i) An empty string was always treated as zero by the numeric comparison
605 operators. This behaviour has been restored.
607 (ii) It is documented that the numeric comparison operators always treat
608 their arguments as decimal numbers. This was broken in that numbers
609 starting with 0 were being interpreted as octal.
611 While fixing these problems I realized that there was another issue that
612 hadn't been noticed. Values of message_size_limit (both the global option
613 and the transport option) were treated as octal if they started with 0.
614 The documentation was vague. These values are now always treated as
615 decimal, and I will make that clear in the documentation.
621 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
622 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
625 MH/01 Don't check that the operands of numeric comparison operators are
626 integers when their expansion is in "skipping" mode (fixes bug
627 introduced by 4.64-PH/07).
629 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
630 child addresses, Exim now panics and dies. Previously, because the count
631 is held in a short int, deliveries were likely to be lost. As such a
632 large number of recipients for a single message is ridiculous
633 (performance will be very, very poor), I have chosen to impose a limit
634 rather than extend the field.
640 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
641 leftover -K file (the existence of which was triggered by #402).
642 While we were at it, introduced process PID as part of the -K
643 filename. This should rule out race conditions when creating
646 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
647 processing considerably. Previous code took too long for large mails,
648 triggering a timeout which in turn triggers #401.
650 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
651 in the DK code in transports.c. sendfile() is not really portable,
652 hence the _LINUX specificness.
654 TF/01 In the add_headers option to the mail command in an Exim filter,
655 there was a bug that Exim would claim a syntax error in any
656 header after the first one which had an odd number of characters
659 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
660 callout verification, Exim cached a "reject" for the entire domain. This
661 is correct for most verifications, but it is not correct for a recipient
662 verification with use_sender or use_postmaster set, because in that case
663 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
664 case of MAIL FROM:<> rejection from other early rejections (e.g.
665 rejection of HELO). When verifying a recipient using a non-null MAIL
666 address, the cache is ignored if it shows MAIL FROM:<> rejection.
667 Whatever the result of the callout, the value of the domain cache is
668 left unchanged (for any other kind of callout, getting as far as trying
669 RCPT means that the domain itself is ok).
671 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
674 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
675 manifest itself as EPIPE rather than ECONNECT. When tidying away a
676 session, the daemon ignores ECONNECT errors and logs others; it now
677 ignores EPIPE as well.
679 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
680 (quoted-printable decoding).
682 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
683 later the small subsequent patch to fix an introduced bug.
685 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
687 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
689 PH/08 An error is now given if message_size_limit is specified negative.
691 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
692 to be given (somewhat) arbitrary names.
694 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
697 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
698 miscellaneous code fixes
700 PH/10 Added the log_reject_target ACL modifier to specify where to log
703 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
704 hostname. This is wrong, because it relates to the incoming message (and
705 probably the interface on which it is arriving) and not to the outgoing
706 callout (which could be using a different interface). This has been
707 changed to use the value of the helo_data option from the smtp transport
708 instead - this is what is used when a message is actually being sent. If
709 there is no remote transport (possible with a router that sets up host
710 addresses), $smtp_active_hostname is used.
712 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
713 tweaks were necessary in order to get it to work (see also 21 below):
714 (a) The code assumed that strncpy() returns a negative number on buffer
715 overflow, which isn't the case. Replaced with Exim's string_format()
717 (b) There were several signed/unsigned issues. I just did the minimum
718 hacking in of casts. There is scope for a larger refactoring.
719 (c) The code used strcasecmp() which is not a standard C function.
720 Replaced with Exim's strcmpic() function.
721 (d) The code set only $1; it now sets $auth1 as well.
722 (e) A simple test gave the error "authentication client didn't specify
723 service in request". It would seem that Dovecot has changed its
724 interface. Fortunately there's a specification; I followed it and
725 changed what the client sends and it appears to be working now.
727 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
730 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
731 address A is aliased to B and C, where B exists and C does not. Without
732 -v the output is "A verified" because verification stops after a
733 successful redirection if more than one address is generated. However,
734 with -v the child addresses are also verified. Exim was outputting "A
735 failed to verify" and then showing the successful verification for C,
736 with its parentage. It now outputs "B failed to verify", showing B's
737 parentage before showing the successful verification of C.
739 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
740 look up a TXT record in a specific list after matching in a combined
743 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
744 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
745 they consult the DNS. I had assumed they would set it the way they
746 wanted; and indeed my experiments on Linux seem to show that in some
747 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
748 To be on the safe side, however, I have now made the interface to
749 host_find_byname() similar to host_find_bydns(), with an argument
750 containing the DNS resolver options. The host_find_byname() function now
751 sets these options at its start, just as host_find_bydns() does. The smtp
752 transport options dns_qualify_single and dns_search_parents are passed to
753 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
754 of host_find_byname() use the default settings of RES_DEFNAMES
755 (qualify_single) but not RES_DNSRCH (search_parents).
757 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
758 spool_read_header() do less string testing, by means of a preliminary
759 switch on the second character of optional "-foo" lines. (This is
760 overdue, caused by the large number of possibilities that now exist.
761 Originally there were few.) While I was there, I also converted the
762 str(n)cmp tests so they don't re-test the leading "-" and the first
763 character, in the hope this might squeeze out yet more improvement.
765 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
766 flag allowing group syntax was set by the header_syntax check but not
767 turned off, possible causing trouble later; (2) The flag was not being
768 set at all for the header_verify test, causing "group"-style headers to
769 be rejected. I have now set it in this case, and also caused header_
770 verify to ignore an empty address taken from a group. While doing this, I
771 came across some other cases where the code for allowing group syntax
772 while scanning a header line wasn't quite right (mostly, not resetting
773 the flag correctly in the right place). These bugs could have caused
774 trouble for malformed header lines. I hope it is now all correct.
776 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
777 with the "reply" argument non-NULL. The code, however (which originally
778 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
779 but it didn't always do it. This confused somebody who was copying the
780 code for some other use. I have removed all the tests.
782 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
783 feature that was used to support insecure browsers during the U.S. crypto
784 embargo. It requires special client support, and Exim is probably the
785 only MTA that supported it -- and would never use it because real RSA is
786 always available. This code has been removed, because it had the bad
787 effect of slowing Exim down by computing (never used) parameters for the
788 RSA_EXPORT functionality.
790 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
791 authenticator to fail if there's a tab character in the incoming data
792 (there should never be unless someone is messing about, as it's supposed
793 to be base64-encoded). Also added, on Timo's advice, the "secured" option
794 if the connection is using TLS or if the remote IP is the same as the
795 local IP, and the "valid-client-cert option" if a client certificate has
798 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
799 authenticators. This can be used for authorization after authentication
800 succeeds. (In the case of plaintext, it servers for both authentication
803 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
804 if any retry times were supplied.
806 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
807 connection, where there is no client IP address to check. In this
808 situation, the verify now always succeeds.
810 PH/25 Applied John Jetmore's -Mset patch.
812 PH/26 Added -bem to be like -Mset, but loading a message from a file.
814 PH/27 In a string expansion for a processed (not raw) header when multiple
815 headers of the same name were present, leading whitespace was being
816 removed from all of them, but trailing whitespace was being removed only
817 from the last one. Now trailing whitespace is removed from each header
818 before concatenation. Completely empty headers in a concatenation (as
821 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
822 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
824 PH/29 [Removed. This was a change that I later backed out, and forgot to
825 correct the ChangeLog entry (that I had efficiently created) before
826 committing the later change.]
828 PH/30 Exim was sometimes attempting to deliver messages that had suffered
829 address errors (4xx response to RCPT) over the same connection as other
830 messages routed to the same hosts. Such deliveries are always "forced",
831 so retry times are not inspected. This resulted in far too many retries
832 for the affected addresses. The effect occurred only when there were more
833 hosts than the hosts_max_try setting in the smtp transport when it had
834 the 4xx errors. Those hosts that it had tried were not added to the list
835 of hosts for which the message was waiting, so if all were tried, there
836 was no problem. Two fixes have been applied:
838 (i) If there are any address or message errors in an SMTP delivery, none
839 of the hosts (tried or untried) are now added to the list of hosts
840 for which the message is waiting, so the message should not be a
841 candidate for sending over the same connection that was used for a
842 successful delivery of some other message. This seems entirely
843 reasonable: after all the message is NOT "waiting for some host".
844 This is so "obvious" that I'm not sure why it wasn't done
845 previously. Hope I haven't missed anything, but it can't do any
846 harm, as the worst effect is to miss an optimization.
848 (ii) If, despite (i), such a delivery is accidentally attempted, the
849 routing retry time is respected, so at least it doesn't keep
850 hammering the server.
852 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
853 in ${readsocket because some servers need this prod.
855 PH/32 Added some extra debug output when updating a wait-xxx database.
857 PH/33 The hint "could be header name not terminated by colon", which has been
858 given for certain expansion errors for a long time, was not being given
859 for the ${if def:h_colon_omitted{... case.
861 PH/34 The spec says: "With one important exception, whenever a domain list is
862 being scanned, $domain contains the subject domain." There was at least
863 one case where this was not true.
865 PH/35 The error "getsockname() failed: connection reset by peer" was being
866 written to the panic log as well as the main log, but it isn't really
867 panic-worthy as it just means the connection died rather early on. I have
868 removed the panic log writing for the ECONNRESET error when getsockname()
871 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
872 runs only) independently of the message's sender address. This meant
873 that, if the 4xx error was in fact related to the sender, a different
874 message to the same recipient with a different sender could confuse
875 things. In particualar, this can happen when sending to a greylisting
876 server, but other circumstances could also provoke similar problems.
877 I have changed the default so that the retry time for these errors is now
878 based a combination of the sender and recipient addresses. This change
879 can be overridden by setting address_retry_include_sender=false in the
882 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
883 remote server are returned as part of bounce messages. This was not
884 happening for LMTP over a pipe (the lmtp transport), but now it is the
885 same for both kinds of LMTP.
887 PH/38 Despite being documented as not happening, Exim was rewriting addresses
888 in header lines that were in fact CNAMEs. This is no longer the case.
890 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
891 and queue runs started by the daemon processed all messages. This has
892 been fixed so that -R and -S can now usefully be given with -q<time>.
894 PH/40 Import PCRE release 6.7 (fixes some bugs).
896 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
898 PH/42 Give an error if -q is specified more than once.
900 PH/43 Renamed the variables $interface_address and $interface_port as
901 $received_ip_address and $received_port, to make it clear that these
902 values apply to message reception, and not to the outgoing interface when
903 a message is delivered. (The old names remain recognized, of course.)
905 PH/44 There was no timeout on the connect() call when using a Unix domain
906 socket in the ${readsocket expansion. There now is.
908 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
909 be meaningful with "accept".
911 SC/01 Eximstats V1.43
912 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
914 SC/02 Eximstats V1.44
915 Use a glob alias rather than an array ref in the generated
916 parser. This improves both readability and performance.
918 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
919 Collect SpamAssassin and rejection statistics.
920 Don't display local sender or destination tables unless
921 there is data to show.
922 Added average volumes into the top table text output.
924 SC/04 Eximstats V1.46
925 Collect data on the number of addresses (recipients)
926 as well as the number of messages.
928 SC/05 Eximstats V1.47
929 Added 'Message too big' to the list of mail rejection
930 reasons (thanks to Marco Gaiarin).
932 SC/06 Eximstats V1.48
933 Mainlog lines which have GMT offsets and are too short to
934 have a flag are now skipped.
936 SC/07 Eximstats V1.49 (Alain Williams)
937 Added the -emptyok flag.
939 SC/08 Eximstats V1.50
940 Fixes for obtaining the IP address from reject messages.
942 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
943 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
944 whitesspace changes from 4.64-PH/27
946 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
949 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
950 are found, allow negative numbers in numeric criteria)
952 JJ/06 exipick.20061117.2, added new $message_body_missing variable
954 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
955 to match changes made in 4.64-PH/43
957 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
959 PH/47 Put in an explicit test for a DNS lookup of an address record where the
960 "domain" is actually an IP address, and force a failure. This locks out
961 those revolvers/nameservers that support "A-for-A" lookups, in
962 contravention of the specifications.
964 PH/48 When a host name was looked up from an IP address, and the subsequent
965 forward lookup of the name timed out, the host name was left in
966 $sender_host_name, contrary to the specification.
968 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
969 restricted to single-key lookups, Exim was not diagnosing an error if
970 * or *@ was used with a query-style lookup.
972 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
974 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
975 long ago, but noone interested enough thought of it. Let's just say that
976 the "1.1" means that there are some new functions that weren't there at
977 some point in the past.
979 PH/51 Error processing for expansion failure of helo_data from an smtp
980 transport during callout processing was broken.
982 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
983 tested/used via the -bh/-bhc/-bs options.
985 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
986 bug, fixed in subsequent PCRE releases).
988 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
989 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
991 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
997 SC/01 Use a glob alias rather than an array ref in eximstats generated
998 parser. This improves both readability and performance.
1000 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1001 Don't display local sender or destination tables in eximstats unless
1002 there is data to show.
1003 Added average volumes into the eximstats top table text output.
1005 SC/03 Collect data on the number of addresses (recipients) as well
1006 as the number of messages in eximstats.
1008 TF/01 Correct an error in the documentation for the redirect router. Exim
1009 does (usually) call initgroups() when daemonizing.
1011 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1012 with consistent privilege compared to when running as a daemon.
1014 TF/03 Note in the spec that $authenticated_id is not set for local
1015 submissions from trusted users.
1017 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1018 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1020 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1021 by adding some example configuration directives to the default
1022 configuration file. A little bit of work is required to uncomment the
1023 directives and define how usernames and passwords are checked, but
1024 there is now a framework to start from.
1026 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1027 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1028 without this. I don't know how relevant this is to other LDAP libraries.
1030 PH/02 Add the verb name to the "unknown ACL verb" error.
1032 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1034 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1036 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1037 directory not expanded when it should be if an expanded home directory
1038 was set for the address (which is overridden by the transport).
1040 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1043 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1044 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1045 because it is too late at that time, and has no effect.
1047 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1048 security issue with \' (bugzilla #107). I could not use the
1049 PQescapeStringConn() function, because it needs a PGconn value as one of
1052 PH/08 When testing addresses using -bt, indicate those final addresses that
1053 are duplicates that would not cause an additional delivery. At least one
1054 person was confused, thinking that -bt output corresponded to deliveries.
1055 (Suppressing duplicates isn't a good idea as you lose the information
1056 about possibly different redirections that led to the duplicates.)
1058 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1059 systems where poll() doesn't work, in particular OS X.
1061 PH/10 Added more information to debugging output for retry time not reached.
1063 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1064 operations in malware.c.
1066 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1069 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1070 syslog_duplication set false, log lines that would normally be written
1071 both the the main log and to the reject log were not written to syslog at
1074 PH/14 In the default configuration, change the use of "message" in ACL warn
1075 statements to "add_header".
1077 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1078 not followed by a command (e.g. "seen endif").
1080 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1081 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1084 PH/17 Added extra conditions to the default value of delay_warning_condition
1088 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1089 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1090 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1093 The Auto-Submitted: and various List- headers are standardised, whereas I
1094 don't think Precedence: ever was.
1096 PH/18 Refactored debugging code in route_finduser() to show more information,
1097 in particular, the error code if getpwnam() issues one.
1099 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1100 This is apparently needed in addition to the PH/07 change above to avoid
1101 any possible encoding problems.
1103 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1104 but not after initializing Perl.
1106 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1107 output them only if debugging. By default they are written stderr,
1108 apparently, which is not desirable.
1110 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1113 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1116 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1118 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1119 authenticated or an ident call has been made. Suppress the default
1120 values for $authenticated_id and $authenticated_sender (but permit -oMai
1121 and -oMas) when testing with -bh.
1123 PH/24 Re-jigged the order of the tests in the default configuration so that the
1124 tests for valid domains and recipients precede the DNS black list and CSA
1125 tests, on the grounds that those ones are more expensive.
1127 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1128 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1129 This bug exists in every version of Exim that I still have, right back to
1132 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1133 However, an attempt to turn on case-sensitivity in a regex key by
1134 including (?-i) didn't work because the subject string was already
1135 lowercased, and the effects were non-intuitive. It turns out that a
1136 one-line patch can be used to allow (?-i) to work as expected.
1142 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1143 other effects) broke the use of negated acl sub-conditions.
1145 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1148 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1149 "Deny" causes Exim to reject the incoming connection with a 554 error.
1150 Unfortunately, if there is a major crisis, such as a disk failure,
1151 tcp-wrappers gives "deny", whereas what one would like would be some
1152 kind of temporary error. A kludge has been added to help with this.
1153 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1154 554 error is used if errno is still zero or contains ENOENT (which occurs
1155 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1158 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1160 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1161 errors. Otherwise a message that provokes a temporary error (when other
1162 messages do not) can cause a whole host to time out.
1164 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1165 addresses were routed directly to files or pipes from a redirect router.
1166 File deliveries just didn't batch; pipe deliveries might have suffered
1169 PH/06 A failure to get a lock for a hints database would erroneously always say
1170 "Failed to get write lock", even when it was really a read lock.
1172 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1173 of 0600. This has been changed to use the value of the lockfile_mode
1174 option (which defaults to 0600).
1176 PH/08 Applied small patch from the Sieve maintainer.
1178 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1179 folder from quota calculations, a direct delivery into this folder messed
1180 up the contents of the maildirsize file. This was because the regex was
1181 used only to exclude .Trash (or whatever) when the size of the mailbox
1182 was calculated. There was no check that a delivery was happening into an
1183 excluded directory. This bug has been fixed by ignoring all quota
1184 processing for deliveries into excluded directories.
1186 PH/10 Added the maildirfolder_create_regex option to appendfile.
1192 PH/01 The code for finding all the local interface addresses on a FreeBSD
1193 system running IPv6 was broken. This may well have applied to all BSD
1194 systems, as well as to others that have similar system calls. The broken
1195 code found IPv4 interfaces correctly, but gave incorrect values for the
1196 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1197 that it would not match correctly against @[] and not recognize the IPv6
1200 PH/02 The ipliteral router was not recognizing addresses of the form user@
1201 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1203 PH/03 Added disable_ipv6.
1205 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1206 decoded form, because it is most often used to construct To: headers
1207 lines in autoreplies, and the decoded form may well be syntactically
1208 invalid. However, $reply_address has leading white space removed, and all
1209 newlines turned into spaces so that the autoreply transport does not
1212 PH/05 If group was specified without a user on a router, and no group or user
1213 was specified on a transport, the group from the router was ignored.
1215 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1216 for visible compile-time settings that can be used to change these
1217 numbers, for those that want even more. Backwards compatibility with old
1218 spool files has been maintained. However, going back to a previous Exim
1219 release will lost any variables that are in spool files.
1221 PH/07 Two small changes when running in the test harness: increase delay when
1222 passing a TCP/IP connection to a new process, in case the original
1223 process has to generate a bounce, and remove special handling of
1224 127.0.0.2 (sic), which is no longer necessary.
1226 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1227 be the same on different OS.
1229 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1232 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1233 whether --show-vars was specified or not
1235 JJ/02 exipick: Added support for new ACL variable spool format introduced
1238 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1239 syntactically invalid From: or Reply-to: line, and a filter used this to
1240 generate an autoreply, and therefore failed to obtain an address for the
1241 autoreply, Exim could try to deliver to a non-existent relative file
1242 name, causing unrelated and misleading errors. What now happens is that
1243 it logs this as a hard delivery error, but does not attempt to create a
1246 PH/11 The exinext utility has a -C option for testing purposes, but although
1247 the given file was scanned by exinext itself; it wasn't being passed on
1248 when Exim was called.
1250 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1251 an end-of-file indication when reading a command response.
1253 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1254 compiled. In many other places in Exim, IPv6 addresses are always
1255 recognized, so I have changed this. It also means that IPv4 domain
1256 literals of the form [IPV4:n.n.n.n] are now always recognized.
1258 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1259 used if the router is not running as root, for example, when verifying at
1260 ACL time, or when using -bh. The debugging output from this situation was
1261 non-existent - all you got was a failure to exec. I have made two
1264 (a) Failures to set uid/gid, the current directory, or a process leader
1265 in a subprocess such as that created by queryprogram now generate
1266 suitable debugging ouput when -d is set.
1268 (b) The queryprogram router detects when it is not running as root,
1269 outputs suitable debugging information if -d is set, and then runs
1270 the subprocess without attempting to change uid/gid.
1272 PH/15 Minor change to Makefile for building test_host (undocumented testing
1275 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1276 additional section of a DNS packet that returns MX or SRV records.
1277 Instead, it always explicitly searches for A/AAAA records. This avoids
1278 major problems that occur when a DNS server includes only records of one
1279 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1280 fixed another bug: if SRV records were looked up and the corresponding
1281 address records were *not* found in the additional section, the port
1282 values from the SRV records were lost.
1284 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1285 using the correct key (the original address) when searching the retry
1286 rules in order to find which one to use for generating the retry hint.
1288 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1289 adding the default one. Similarly, if it contains a Reply-To: header, the
1290 errors_reply_to option, if set, is not used.
1292 PH/19 When calculating a retry time, Exim used to measure the "time since
1293 failure" by looking at the "first failed" field in the retry record. Now
1294 it does not use this if it is later than than the arrival time of the
1295 message. Instead it uses the arrival time. This makes for better
1296 behaviour in cases where some deliveries succeed, thus re-setting the
1297 "first failed" field. An example is a quota failure for a huge message
1298 when small messages continue to be delivered. Without this change, the
1299 "time since failure" will always be short, possible causing more frequent
1300 delivery attempts for the huge message than are intended.
1301 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1303 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1304 $1, $2, $3) because the numerical variables can be reset during some
1305 expansion items (e.g. "match"), thereby losing the authentication data.
1307 PH/21 Make -bV show the size of off_t variables so that the test suite can
1308 decide whether to run tests for quotas > 2G.
1310 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1311 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1312 filecount value is greater than 2G or if a quota value is greater than 2G
1313 on a system where the size of off_t is not greater than 4, a panic error
1316 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1317 never match. The debug and -bh output now contains an explicit error
1318 message indicating a malformed IPv4 address or mask.
1320 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1321 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1322 PH/23 above applies.
1324 PH/25 Do not write to syslog when running in the test harness. The only
1325 occasion when this arises is a failure to open the main or panic logs
1326 (for which there is an explicit test).
1328 PH/26 Added the /no_tell option to "control=freeze".
1330 PH/27 If a host name lookup failed very early in a connection, for example, if
1331 the IP address matched host_lookup and the reverse lookup yielded a name
1332 that did not have a forward lookup, an error message of the form "no IP
1333 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1334 could be logged. Now it outputs the IP address instead of "NULL".
1336 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1337 allows the sender and the authenticated sender to be set when
1338 submitting a message from within Exim. Since child_open_exim() is
1339 documented for local_scan(), the new function should be too.
1341 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1342 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1343 results in an empty string is now treated as unset.
1345 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1347 PH/31 Added sender_verify_fail logging option.
1349 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1350 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1351 tidied the source and removed it altogether.
1353 PH/33 When a queue run was abandoned because the load average was too high, a
1354 log line was always written; now it is written only if the queue_run log
1355 selector is set. In addition, the log line for abandonment now contains
1356 information about the queue run such as the pid. This is always present
1357 in "start" and "stop" lines but was omitted from the "abandon" line.
1359 PH/34 Omit spaces between a header name and the colon in the error message that
1360 is given when verify = headers_syntax fails (if there are lots of them,
1361 the message gets confusing).
1363 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1364 names, as there are now some PTR records that contain slashes. This check
1365 is only to protect against broken name servers that fall over on strange
1366 characters, so the fact that it applies to all lookups doesn't matter.
1368 PH/36 Now that the new test suite is complete, we can remove some of the
1369 special code in Exim that was needed for the old test suite. For example,
1370 sorting DNS records because real resolvers return them in an arbitrary
1371 order. The new test suite's fake resolver always returns records in the
1374 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1375 bounces) except when queue_only is set, to avoid logging races between
1376 the different processes.
1378 PH/38 Panic-die if .include specifies a non-absolute path.
1380 PH/39 A tweak to the "H" retry rule from its user.
1382 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1383 a label. They prevented compilation on older perls.
1385 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1386 a warning to be raised on newish perls.
1388 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1389 on queue. Changes to match documented behaviour of showing count of
1390 messages matching specified criteria.
1392 PH/40 Changed the default ident timeout from 30s to 5s.
1394 PH/41 Added support for the use of login_cap features, on those BSD systems
1395 that have them, for controlling the resources used by pipe deliveries.
1397 PH/42 The content-scanning code uses fopen() to create files in which to put
1398 message data. Previously it was not paying any attention to the mode of
1399 the files. Exim runs with umask(0) because the rest of the code creates
1400 files with open(), and sets the required mode explicitly. Thus, these
1401 files were ending up world-writeable. This was not a big issue, because,
1402 being within the spool directory, they were not world-accessible. I have
1403 created a function called modefopen, which takes an additional mode
1404 argument. It sets umask(777), creates the file, chmods it to the required
1405 mode, then resets the umask. All the relevant calls to fopen() in the
1406 content scanning code have been changed to use this function.
1408 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1409 to 24 hours. This avoids potential overflow problems when processing G
1410 and H retry rules. I suspect nobody ever tinkers with this value.
1412 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1414 PH/45 When the plaintext authenticator is running as a client, the server's
1415 challenges are checked to ensure they are valid base64 strings. By
1416 default, the authentication attempt is cancelled if an invalid string is
1417 received. Setting client_ignore_invalid_base64 true ignores these errors.
1418 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1419 they are received. Thus, the responses can be made to depend on the
1420 challenges. If an invalid string is ignored, an empty string is placed in
1423 PH/46 Messages that are created by the autoreply transport now contains a
1424 References: header, in accordance with RFCs 2822 and 3834.
1426 PH/47 Added authenticated_sender_force to the smtp transport.
1428 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1430 PH/49 Installed latest patch from the Sieve maintainer.
1432 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1433 was also set, the appendfile transport was unnecessarily scanning a
1434 directory of message files (e.g. for maildir delivery) to find the count
1435 of files (along with the size), even though it did not need this
1436 information. It now does the scan only if it needs to find either the
1437 size of the count of files.
1439 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1441 PH/52 Two bugs concerned with error handling when the smtp transport is
1444 (i) Exim was not creating retry information for temporary errors given
1445 for individual recipients after the DATA command when the smtp transport
1446 was used in LMTP mode. This meant that they could be retried too
1447 frequently, and not timed out correctly.
1449 (ii) Exim was setting the flag that allows error details to be returned
1450 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1451 recipients that were returned after the DATA command.
1453 PH/53 This is related to PH/52, but is more general: for any failing address,
1454 when detailed error information was permitted to be returned to the
1455 sender, but the error was temporary, then after the final timeout, only
1456 "retry timeout exceeded" was returned. Now it returns the full error as
1457 well as "retry timeout exceeded".
1459 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1460 do this, and (what is worse) MTAs that accept it.
1462 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1463 will now be deprecated.
1465 PH/56 New os.c-cygwin from the Cygwin maintainer.
1467 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1468 formats (previously only available in exim formats via -bpr, -bpru,
1469 and -bpra. Now also available in native and exiqgrep formats)
1471 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1472 with very large, slow to parse queues
1474 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1476 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1478 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1479 responses to authentication challenges, though it was showing the
1480 challenges; (ii) I've removed the CR characters from the debug output for
1483 PH/58 Allow for the insertion of a newline as well as a space when a string
1484 is turned into more than one encoded-word during RFC 2047 encoding. The
1485 Sieve code now uses this.
1487 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1488 data_4xx, lost_connection, tls_required.
1490 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1491 message was being sent as an SMTP response.
1493 PH/61 Add -l and -k options to exicyclog.
1495 PH/62 When verifying, if an address was redirected to one new address, so that
1496 verification continued, and the new address failed or deferred after
1497 having set something in $address_data, the value of $address_data was not
1498 passed back to the ACL. This was different to the case when no
1499 redirection occurred. The value is now passed back in both cases.
1501 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1502 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1503 use login_cap.h, so on its own it isn't the distinguishing feature. The
1504 new name refers directly to the setclassresources() function.
1506 PH/65 Added configuration files for NetBSD3.
1508 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1510 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1511 is preferred over IPv4.
1513 PH/68 The bounce_return_message and bounce_return_body options were not being
1514 honoured for bounces generated during the reception of non-SMTP messages.
1515 In particular, this applied to messages rejected by the ACL. This bug has
1516 been fixed. However, if bounce_return_message is true and bounce_return_
1517 body is false, the headers that are returned for a non-SMTP message
1518 include only those that have been read before the error was detected.
1519 (In the case of an ACL rejection, they have all been read.)
1521 PH/69 The HTML version of the specification is now built in a directory called
1522 spec_html instead of spec.html, because the latter looks like a path with
1523 a MIME-type, and this confuses some software.
1525 PH/70 Catch two compiler warnings in sieve.c.
1527 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1528 function verify_get_ident() calls ip_connect() to connect a socket, but
1529 if the "connect()" function timed out, ip_connect() used to close the
1530 socket. However, verify_get_ident() also closes the socket later, and in
1531 between Exim writes to the log, which may get opened at this point. When
1532 the socket was closed in ip_connect(), the log could get the same file
1533 descriptor number as the socket. This naturally causes chaos. The fix is
1534 not to close the socket in ip_connect(); the socket should be closed by
1535 the function that creates it. There was only one place in the code where
1536 this was missing, in the iplookup router, which I don't think anybody now
1537 uses, but I've fixed it anyway.
1539 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1540 well as to direct DNS lookups. Otherwise the handling of names in host
1541 lists is inconsistent and therefore confusing.
1547 PH/01 Two changes to the default runtime configuration:
1549 (1) Move the checks for relay_from_hosts and authenticated clients from
1550 after to before the (commented out) DNS black list checks.
1552 (2) Add control=submission to the relay_from_hosts and authenticated
1553 clients checks, on the grounds that messages accepted by these
1554 statements are most likely to be submissions.
1556 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1558 (1) Generate an error if the third argument for the ${prvs expansion is
1561 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1564 (3) Reset the variables that are obtained from the first argument of
1565 ${prvscheck and used in the second argument before leaving the code,
1566 because their memory is reclaimed, so using them afterwards may do
1569 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1570 one (it's much easier than Tom thought :-).
1572 (5) Because of (4), we can now allow for the use of $prvscheck_result
1573 inside the third argument.
1575 PH/03 For some reason, the default setting of PATH when running a command from
1576 a pipe transport was just "/usr/bin". I have changed it to
1579 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1580 anything to be listed in the output from -bV.
1582 PH/05 When a filter generated an autoreply, the entire To: header line was
1583 quoted in the delivery log line, like this:
1585 => >A.N.Other <ano@some.domain> <original@ddress> ...
1587 This has been changed so that it extracts the operative address. There
1588 may be more than one such address. If so, they are comma-separated, like
1591 => >ano@some.domain,ona@other.domain <original@ddress> ...
1593 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1594 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1595 not being looked up in the rDNS to get a host name, Exim was showing the
1596 IP address twice in Received: lines, even though the IP addresses were
1597 identical. For example:
1599 Received: from [1.2.3.4] (helo=[1.2.3.4])
1601 However, if the real host name was known, it was omitting the HELO data
1602 if it matched the actual IP address. This has been tidied up so that it
1603 doesn't show the same IP address twice.
1605 PH/07 When both +timestamp and +memory debugging was on, the value given by
1606 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1607 called by the debug printing, thereby overwriting the timestamp buffer.
1608 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1610 PH/08 When the original message was included in an autoreply transport, it
1611 always said "this is a copy of the message, including all the headers",
1612 even if body_only or headers_only was set. It now gives an appropriate
1615 PH/09 Applied a patch from the Sieve maintainer which:
1617 o fixes some comments
1618 o adds the (disabled) notify extension core
1619 o adds some debug output for the result of if/elsif tests
1620 o points to the current vacation draft in the documentation
1621 and documents the missing references header update
1625 o fixes a bug in processing the envelope test (when testing
1626 multiple envelope elements, the last element determinted the
1629 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1630 Electronic Mail") by including:
1632 Auto-submitted: auto-generated
1634 in the messages that it generates (bounce messages and others, such as
1635 warnings). In the case of bounce messages for non-SMTP mesages, there was
1636 also a typo: it was using "Auto_submitted" (underscore instead of
1637 hyphen). Since every message generated by Exim is necessarily in response
1638 to another message, thes have all been changed to:
1640 Auto-Submitted: auto-replied
1642 in accordance with these statements in the RFC:
1644 The auto-replied keyword:
1646 - SHOULD be used on messages sent in direct response to another
1647 message by an automatic process,
1649 - MUST NOT be used on manually-generated messages,
1651 - MAY be used on Delivery Status Notifications (DSNs) and Message
1652 Disposition Notifications (MDNs),
1654 - MUST NOT be used on messages generated by automatic or periodic
1655 processes, except for messages which are automatic responses to
1658 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1659 to the default Received: header definition.
1661 PH/12 Added log selector acl_warn_skipped (default on).
1663 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1664 variables because (a) they are in the wrong storage pool and (b) even if
1665 they were copied, it wouldn't work properly because of the caching.
1667 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1668 checking when decoding. Apparently there are clients that generate
1669 overlong encoded strings. Why am I not surprised?
1671 PH/15 If the first argument of "${if match_address" was not empty, but did not
1672 contain an "@" character, Exim crashed. Now it writes a panic log message
1673 and treats the condition as false.
1675 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1677 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1678 extension "envelope-auth". The code is finished and in agreement with
1679 other implementations, but there is no documentation so far and in fact,
1680 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1681 not changing the active code.
1683 Print executed "if" and "elsif" statements when debugging is used. This
1684 helps a great deal to understand what a filter does.
1686 Document more things not specified clearly in RFC3028. I had all this
1687 sorted out, when out of a sudden new issues came to my mind. Oops."
1689 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1692 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1693 canonical form (as documented). However, after a host name lookup from
1694 the IP address, check_host() was doing a simple string comparison with
1695 addresses acquired from the DNS when checking that the found name did
1696 have the original IP as one of its addresses. Since any found IPv6
1697 addresses are likely to be in abbreviated form, the comparison could
1698 fail. Luckily, there already exists a function for doing the comparison
1699 by converting both addresses to binary, so now that is used instead of
1700 the text comparison.
1702 PH/20 There was another similar case to PH/19, when a complete host name was
1703 given in a host list; looking up its IP address could give an abbreviated
1704 form, whereas the current host's name might or might not be abbreviated.
1705 The same fix has been applied.
1711 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1712 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1715 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1716 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1718 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1720 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1721 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1722 Also, for "Auto-Submitted", treat anything other than "no" as
1723 non-personal, in accordance with RFC 3834. (Previously it treated
1724 anything starting "auto-" as non-personal.)
1726 TF/01 The control=submission/name=... option had a problem with syntax
1727 errors if the name included a slash character. The /name= option
1728 now slurps the rest of the string, so it can include any characters
1729 but it must come last in the list of options (after /sender_retain
1732 PH/05 Some modifications to the interface to the fake nameserver for the new
1740 TK/01 Added the "success_on_redirect" address verification option. See
1741 NewStuff for rationale and an example.
1743 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1745 PH/02 Patch to exigrep to allow it to work on syslog lines.
1747 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1748 fread() to skip over the body file's header line, because in Cygwin the
1749 header line is locked and is inaccessible.
1751 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1752 co-exist for some time) to make it clear that it is the Exim ID that is
1753 referenced, not the Message-ID: header line.
1755 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1756 string_format() function, because snprintf() does not exist on all
1759 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1760 ${stat: expansion item.
1762 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1763 protocol synchronization error", to keep the pedants happy.
1765 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1766 well as for IRIX systems, when gcc is being used. See the host.c source
1769 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1771 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1774 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1775 transport and to the smtp transport in LMTP mode.
1777 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1779 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1780 run a filter in a subprocess. This could lead to confusion in subsequent
1781 lookups in the parent process. There should also be a search_tidyup() at
1782 the end of the subprocess.
1784 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1785 only if the host matched helo_try_verify_hosts, which caused the
1786 verification to occur when the EHLO/HELO command was issued. The ACL just
1787 tested the remembered result. Now, if a previous verification attempt has
1788 not happened, "verify = helo" does it there and then.
1790 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1792 TK/03 Fix log output including CR from clamd.
1794 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1795 exist provoked a memory error which could cause a segfault.
1797 PH/15 Installed PCRE 6.2
1799 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1801 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1802 of the problem. Specifically, suggested +O2 rather than +O1 for the
1805 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1807 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1808 record, the port was not correctly logged when the outgoing_port log
1809 selector was set (it logged the transort's default port).
1811 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1812 fallback_hosts, and "hosts" in the smtp transport.
1814 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1815 host errors such as "Connection refused".
1817 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1818 authentication with radiusclient 0.4.9:
1820 - Error returned from rc_read_config was caught wrongly
1821 - Username/password not passed on to radius server due to wrong length.
1823 The presumption is that some radiusclient API changes for 4.51/PH/17
1824 were not taken care of correctly. The code is still untested by me (my
1825 Linux distribution still has 0.3.2 of radiusclient), but it was
1826 contributed by a Radius user.
1828 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1829 expanding the "port" option of the smtp transport.
1831 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1832 while reading a MIME header. Thanks to Tom Hughes for a patch.
1834 PH/24 Include config.h inside local_scan.h so that configuration settings are
1837 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1838 that in an ACL for RCPT (for example), you can examine exactly what was
1841 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1842 commands, but it was not correctly comparing the address with the actual
1843 client host address. Thus, it would show the EHLO address in Received:
1844 header lines when this was not necessary.
1846 PH/27 Added the % operator to ${eval:}.
1848 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1849 it should be ignoring failures (because with -C, for example, it has lost
1850 privilege). It wasn't ignoring creation failures other than "already
1853 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1856 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1857 because an input line was too long, either on its own, or by virtue of
1858 too many continuations, the temporary file was not being removed, and the
1859 return code was incorrect.
1861 PH/31 Missing "BOOL" in function definition in filtertest.c.
1863 PH/32 Applied Sieve patches from the maintainer.
1865 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1867 PH/33 Added "verify = not_blind".
1869 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1870 Local/Makefile (with some defaults set). These are used in built scripts
1871 such as exicyclog, but they have never been used in the exim_install
1872 script (though there are many overriding facilities there). I have
1873 arranged that the exim_install script now takes note of these two
1876 PH/35 Installed configuration files for Dragonfly.
1878 PH/36 When a locally submitted message by a trusted user did not contain a
1879 From: header, and the sender address was obtained from -f or from an SMTP
1880 MAIL command, and the trusted user did not use -F to supply a sender
1881 name, $originator_name was incorrectly used when constructing a From:
1882 header. Furthermore, $originator_name was used for submission mode
1883 messages from external hosts without From: headers in a similar way,
1884 which is clearly wrong.
1886 PH/37 Added control=suppress_local_fixups.
1888 PH/38 When log_selector = +received_sender was set, and the addition of the
1889 sender made the log line's construction buffer exactly full, or one byte
1890 less than full, an overflow happened when the terminating "\n" was
1893 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1894 when the result of a list match is failure because a DNS lookup failed.
1896 PH/40 RM_COMMAND is now used in the building process.
1898 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1899 the "build-* directories that it finds.
1901 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1902 address in a domain literal was a prefix of an interface address.
1904 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1905 when verifying a sender address, unless rewrite_headers is false.
1907 PH/44 Wrote a long comment about why errors_to addresses are verified as
1908 recipients, not senders.
1910 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1911 the ratelimit ACL was added.
1913 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1915 PH/46 Added extra information about PostgreSQL errors to the error string.
1917 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1918 avoiding the need to install special zones in a real server. This is
1919 backwards compatible; if it can't find the fake resolver, it drops back.
1920 Thus, both old and new test suites can be run.
1922 TF/02 Added util/ratelimit.pl
1924 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1925 clock is set back in time.
1927 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1928 Candler <B.Candler@pobox.com>.
1930 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1931 OK for addresses that are the result of redirections.
1933 PH/48 A number of further additions for the benefit of the new test suite,
1934 including a fake gethostbyname() that interfaces to the fake DNS resolver
1937 TF/06 The fix for widen_domains has also been applied to qualify_single and
1938 search_parents which are the other dnslookup options that can cause
1941 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1944 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1946 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1947 service" if it encountered an MX record with an empty target hostname.
1948 The message is now "an MX or SRV record indicated no SMTP service".
1950 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1951 if the DNS of the sending site is misconfigured. This is quite a
1952 common situation. This change restores the behaviour of treating a
1953 helo verification defer as a failure.
1955 PH/51 If self=fail was set on a router, the bounce message did not include the
1956 actual error message.
1962 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1964 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1965 command itself ended in error, the underlying message about the transport
1966 filter timeout was being overwritten with the pipe command error. Now the
1967 underlying error message should be appended to the second error message.
1969 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1971 PH/02 Reduce the amount of output that "make" produces by default. Full output
1972 can still be requested.
1974 PH/03 The warning log line about a condition test deferring for a "warn" verb
1975 was being output only once per connection, rather than after each
1976 occurrence (because it was using the same function as for successful
1977 "warn" verbs). This seems wrong, so I have changed it.
1979 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1980 it should not have, which might have caused a crash in the right
1981 circumstances, but probably never did.
1983 PH/04 Installed a modified version of Tony Finch's patch to make submission
1984 mode fix the return path as well as the Sender: header line, and to
1985 add a /name= option so that you can make the user's friendly name appear
1988 TF/03 Added the control = fakedefer ACL modifier.
1990 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1991 Mark Lowes for thorough testing.
1993 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1995 TK/03 Merged latest SRS patch from Miles Wilton.
1997 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1998 with the definition in sysexits.h (which is #included earlier).
1999 Fortunately, Exim does not actually use EX_OK. The code used to try to
2000 preserve the sysexits.h value, by assumimg that macro definitions were
2001 scanned for macro replacements. I have been disabused of this notion,
2002 so now the code just undefines EX_OK before #including unistd.h.
2004 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2005 in the smtp transport. When a block could not be written in a single
2006 write() function, the timeout was being re-applied to each part-write.
2007 This seems wrong - if the receiver was accepting one byte at a time it
2008 would take for ever. The timeout is now adjusted when this happens. It
2009 doesn't have to be particularly precise.
2011 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2012 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2014 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2015 without a domain if the check to <postmaster@domain> fails.
2017 SC/01 Eximstats: added -xls and the ability to specify output files
2018 (patch written by Frank Heydlauf).
2020 SC/02 Eximstats: use FileHandles for outputing results.
2022 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2024 SC/04 Eximstats: fixed display of large numbers with -nvr option
2026 SC/05 Eximstats: fixed merging of reports with empty tables.
2028 SC/06 Eximstats: added the -include_original_destination flag
2030 SC/07 Eximstats: removed tabs and trailing whitespace.
2032 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2034 TK/06 MBOX spool code: Add real "From " MBOX separator line
2035 so the .eml file is really in mbox format (even though
2036 most programs do not really care). Patch from Alex Miller.
2038 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2039 The latter is generated from $received_to and is only set if the
2040 message has one envelope recipient. SA can use these headers,
2041 obviously out-of-the-box. Patch from Alex Miller.
2043 PH/08 The ${def test on a variable was returning false if the variable's
2044 value was "0", contrary to what the specification has always said!
2045 The result should be true unless the variable is empty.
2047 PH/09 The syntax error of a character other than { following "${if
2048 def:variable_name" (after optional whitespace) was not being diagnosed.
2049 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2050 accidental colon was present, for example, could give incorrect results.
2052 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2053 result is used (not including appendfile, where other changes are about
2056 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2057 This involved changing a lot of size variables from int to off_t. It
2058 should work with maildirs and everything.
2060 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2061 spamd dying while we are connected to it.
2063 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2066 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2067 function for BDB 4.3.
2069 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2071 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2072 the sources for PCRE have been re-arranged and more files are now
2075 PH/15 The code I had for printing potentially long long variables in PH/11
2076 above was not the best (it lost precision). The length of off_t variables
2077 is now inspected at build time, and an appropriate printing format (%ld
2078 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2079 to be "long long int" or "long int". This is needed for the internal
2080 formatting function string_vformat().
2082 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2083 the configuration file to be ":syslog", then the script "guesses" where
2084 the logs files are, rather than using the compiled in default. In our
2085 case the guess is not the same as the compiled default, so the script
2086 suddenly stopped working when I started to use syslog. The patch checks
2087 to see if log_file_path is "". If so, it attempts to read it from exim
2088 with no configuration file to get the compiled in version, before it
2089 falls back to the previous guessing code."
2091 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2092 implementing BATV in an Exim configuration. See NewStuff for the gory
2095 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2096 Makefile that are specific to HP-UX.
2098 PH/18 If the "use_postmaster" option was set for a recipient callout together
2099 with the "random" option, the postmaster address was used as the MAIL
2100 FROM address for the random test, but not for the subsequent recipient
2101 test. It is now used for both.
2103 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2104 patch removes a few documentation additions to RFC 3028, because the
2105 latest draft now contains them. It adds the new en;ascii-case comparator
2106 and a new error check for 8bit text in MIME parts. Comparator and
2107 require names are now matched exactly. I enabled the subaddress
2108 extension, but it is not well tested yet (read: it works for me)."
2110 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2111 rework some of the code of TK/09 above to avoid the hardwired use of
2112 "%lld" and "long long". Replaced the call to snprintf() with a call to
2115 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2116 records point to non-existent hosts", "retry timeout exceeded", and
2117 "retry time not reached for any host after a long failure period".
2119 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2120 experimental DomainKeys support:
2122 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2123 (2) On an error such as an illegally used "control", the wrong name for
2124 the control was given.
2126 These problems did NOT occur unless DomainKeys support was compiled.
2128 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2130 PH/24 Added ${if match_ip condition.
2132 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2133 databases so that it will be absolutely obvious if a crash occurs in the
2134 DB library. This is a regular occurrence (often caused by mis-matched
2137 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2138 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2139 picked up on a user's system that detects such things. There doesn't seem
2140 to be a gcc warning option for this - only an attribute that has to be
2141 put on the function's prototype. It seems that in Fedora Core 4 they have
2142 set this on a number of new functions. No doubt there will be more in due
2145 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2146 specify a transport. However, if an address that was verified by such a
2147 router was the subject of a callout, Exim crashed because it tried to
2148 read the rcpt_include_affixes from the non-existent transport. Now it
2149 just assumes that the setting of that option is false. This bug was
2150 introduced by 4.51/PH/31.
2152 PH/28 Changed -d+all to exclude +memory, because that information is very
2153 rarely of interest, but it makes the output a lot bigger. People tend to
2154 do -d+all out of habit.
2156 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2157 code in os-type was giving problems when libc.so lives in lib64, like on
2160 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2161 aren't the modern standard, and it seems that some systems' include files
2162 don't always have them. Exim was already checking for some of the newer
2163 ones like T_AAAA, and defining it itself. I've added checks for all the
2164 record types that Exim uses.
2166 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2167 not automatically generating a new one, as it is supposed to. This
2168 prevented TLS from working. If the file did exist, but contained invalid
2169 data, a new version was generated, as expected. It was only the case of a
2170 non-existent file that was broken.
2172 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2173 with a change in libdomainkeys > 0.64.
2175 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2176 from DNS. If the selector record carries the flag, it now has
2177 precedence over the domain-wide flag.
2179 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2181 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2182 the use of a port name that isn't defined in /etc/services) occurred, the
2183 message was deferred as in a normal delivery, and thus remained on the
2184 spool, instead of being failed because of the mua_wrapper setting. This
2185 is now fixed, and I tidied up some of the mua_wrapper messages at the
2188 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2189 the messages in a hash of arrays rather than using individual hashes.
2190 This is a bit cleaner and results in dramatic memory savings, albeit
2191 at a slight CPU cost.
2193 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2194 as requested by Marc Sherman.
2196 SC/10 Eximstats: added histograms for user specified patterns as requested
2199 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2201 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2202 fopen() in the content-scanning modules that did not already have it.
2208 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2209 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2211 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2213 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2215 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2216 to test Sieve filters that use "vacation".
2218 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2219 that changes the way the GnuTLS parameters are stored in the cache file.
2220 The new format can be generated externally. For backward compatibility,
2221 if the data in the cache doesn't make sense, Exim assumes it has read an
2222 old-format file, and it generates new data and writes a new file. This
2223 means that you can't go back to an older release without removing the
2226 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2227 work if there are any delivery delays because "one_time" forces the
2228 parent to be marked "delivered", so its unseen clone is never tried
2229 again. For this reason, Exim now forbids the simultaneous setting of
2232 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2233 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2234 entry if you want to know the details. The fix, however, neglected to
2235 consider the case when local delivery batching is involved. The test for
2236 "previously delivered" was not happening when checking to see if an
2237 address could be batched with a previous (undelivered) one; under
2238 certain circumstances this could lead to multiple deliveries to the same
2241 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2242 in its include files, and this causes problems building Exim.
2244 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2245 header_syntax) but Exim was just ignoring anything given after a slash.
2246 In particular, this caused confusion with an attempt to use "verify =
2247 reverse_host_lookup/defer_ok". An error is now given when options are
2248 supplied for verify items that do not have them. (Maybe reverse_host_
2249 lookup should have a defer_ok option, but that's a different point.)
2251 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2252 defined by RFC 821) to 2048, because there were problems with some AUTH
2253 commands, and RFC 1869 says the size should be increased for extended
2254 SMTP commands that take arguments.
2256 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2259 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2260 "unknown" error; now it says that the functionality isn't in the binary.
2262 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2263 an address' error message when a string expansion fails (syntax or
2264 whatever). Otherwise the password may appear in the log. Following change
2265 PH/42 below, there is no longer a chance of it appearing in a bounce
2268 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2270 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2271 of its addresses was ever tried. (Bugzilla bug #2.)
2273 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2274 the result incorrectly in the debug output. (It correctly added a newline
2275 to what was transported.)
2277 TF/01 Added $received_time.
2279 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2280 commented out examples of how to interface to a virus scanner and to
2281 SpamAssassin. Also added commented examples of av_scanner and
2282 spamd_address settings.
2284 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2285 and controls are allowed in which ACLs. There were a couple of minor
2286 errors. Some of the entries in the conditions table (which is a table of
2287 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2288 negation of where the condition IS allowed.
2290 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2292 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2293 header file does not have a version number, so I've had to invent a new
2294 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2295 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2296 radiusclient), but it was contributed by a Radius user.
2298 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2299 files or directories, for OpenSSL.
2301 PH/19 When an Exim process that is running as root has to create an Exim log
2302 file, it does so in a subprocess that runs as exim:exim so as to get the
2303 ownership right at creation (otherwise, other Exim processes might see
2304 the file with the wrong ownership). There was no test for failure of this
2305 fork() call, which would lead to the process getting stuck as it waited
2306 for a non-existent subprocess. Forks do occasionally fail when resources
2307 run out. I reviewed all the other calls to fork(); they all seem to check
2310 PH/20 When checking for unexpected SMTP input at connect time (before writing
2311 the banner), Exim was not dealing correctly with a non-positive return
2312 from the read() function. If the client had disconnected by this time,
2313 the result was a log entry for a synchronization error with an empty
2314 string after "input=" when read() returned zero. If read() returned -1
2315 (an event I could not check), uninitialized data bytes were printed.
2316 There were reports of junk text (parts of files, etc) appearing after
2319 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2321 PH/22 Added support for macro redefinition, and (re)definition in between
2322 driver and ACL definitions.
2324 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2325 forgetting to use the resulting value; it was using the unexpanded value.
2327 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2328 hadn't been configured. The fix is from Juergen Kreileder, who
2329 understands it better than I do:
2331 "Here's what I see happening with three configured cyrus_sasl
2332 authenticators configured (plain, login, cram-md5):
2334 On startup auth_cyrus_sasl_init() gets called for each of these.
2335 This means three calls to sasl_listmech() without a specified mech_list.
2336 => SASL tests which mechs of all available mechs actually work
2337 => three warnings about OTP not working
2338 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2340 With the patch, sasl_listmech() also gets called three times. But now
2341 SASL's mech_list option is set to the server_mech specified in the the
2342 authenticator. Or in other words, the answer from sasl_listmech()
2343 gets limited to just the mech you're testing for (which is different
2345 => the return list contains just 'plain' or 'login', 'cram-md5' or
2346 nothing depending on the value of ob->server_mech.
2348 I've just tested the patch: Authentication still works fine,
2349 unavailable mechs specified in the exim configuration are still
2350 caught, and the auth.log warnings about OTP are gone."
2352 PH/25 When debugging is enabled, the contents of the command line are added
2353 to the debugging output, even when log_selector=+arguments is not
2356 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2357 answer is "GNU", and only if the return is "GNU/something" is the answer
2360 PH/27 $acl_verify_message is now set immediately after the failure of a
2361 verification in an ACL, and so is available in subsequent modifiers. In
2362 particular, the message can be preserved by coding like this:
2364 warn !verify = sender
2365 set acl_m0 = $acl_verify_message
2367 Previously, $acl_verify_message was set only while expanding "message"
2368 and "log_message" when a very denied access.
2370 PH/28 Modified OS/os.c-Linux with
2372 -#ifndef OS_LOAD_AVERAGE
2373 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2375 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2376 nomenclature these days.)
2378 PH/29 Installed patch from the Sieve maintainer that adds the options
2379 sieve_useraddress and sieve_subaddress to the redirect router.
2381 PH/30 In these circumstances:
2382 . Two addresses routed to the same list of hosts;
2383 . First host does not offer TLS;
2384 . First host accepts first address;
2385 . First host gives temporary error to second address;
2386 . Second host offers TLS and a TLS session is established;
2387 . Second host accepts second address.
2388 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2389 and peerdn, if requested) that were in fact used only for the second
2392 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2393 attention to any local part prefix or suffix that was matched by the
2394 router that accepted the address. It now behaves in the same way as it
2395 does for delivery: the affixes are removed from the local part unless
2396 rcpt_include_affixes is set on the transport.
2398 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2399 timeout during the DATA phase of an incoming message.
2401 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2402 applied a patch sanctioned by the Sieve maintainer.
2404 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2405 the uid or gid is negative. A case of a negative gid caused this to be
2406 noticed. The fix allows for either to be negative.
2408 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2409 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2412 PH/36 The change PH/12 above was broken. Fixed it.
2414 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2415 the grounds that routing the same address twice would always produce the
2416 same answer. This might have been true once, but it is certainly no
2417 longer true now. Routing a child address may depend on the previous
2418 routing that produced that child. Some complicated redirection strategies
2419 went wrong when messages had multiple recipients, and made Exim's
2420 behaviour dependent on the order in which the addresses were given.
2422 I have moved the duplicate checking until after the routing is complete.
2423 Exim scans the addresses that are assigned to local and remote
2424 transports, and removes any duplicates. This means that more work will be
2425 done, as duplicates will always all be routed, but duplicates are
2426 presumably rare, so I don't expect this is of any significance.
2428 For deliveries to pipes, files, and autoreplies, the duplicate checking
2429 still happens during the routing process, since they are not going to be
2432 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2433 It corrects a timeout issue with spamd. This is Ian's comment: "The
2434 background is that sometimes spamd either never reads data from a
2435 connection it has accepted, or it never writes response data. The exiscan
2436 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2437 blindly assumes that writes won't block so it may never time out."
2439 PH/39 Allow G after quota size as well as K and M.
2441 PH/40 The value set for $authenticated_id in an authenticator may not contain
2442 binary zeroes or newlines because the value is written to log lines and
2443 to spool files. There was no check on this. Now the value is run through
2444 the string_printing() function so that such characters are converted to
2445 printable escape sequences.
2447 PH/41 $message_linecount is a new variable that contains the total number of
2448 lines in the message. Compare $body_linecount, which is the count for the
2451 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2452 bounce and delay warning messages, except in certain special cases, which
2455 (a) An SMTP error message from a remote host;
2456 (b) A message specified in a :fail: redirection;
2457 (c) A message specified in a "fail" command in a system filter;
2458 (d) A message specified in a FAIL return from the queryprogram router;
2459 (e) A message specified by the cannot_route_message router option.
2461 In these cases only, Exim does include the error details in bounce and
2462 warning messages. There are also a few cases where bland messages such
2463 as "unrouteable address" or "local delivery error" are given.
2465 PH/43 $value is now also set for the "else" part of a ${run expansion.
2467 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2468 being worked on, but at least Exim now implements the latest version to
2471 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2472 process to complete was treated as a delivery failure, a timeout while
2473 writing the message to the pipe was logged, but erroneously treated as a
2474 successful delivery. Such timeouts include transport filter timeouts. For
2475 consistency with the overall process timeout, these timeouts are now
2476 treated as errors, giving rise to delivery failures by default. However,
2477 there is now a new Boolean option for the pipe transport called
2478 timeout_defer, which, if set TRUE, converts the failures into defers for
2479 both kinds of timeout. A transport filter timeout is now identified in
2482 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2483 systems where "make" and "gmake" are different, calling "gmake" at top
2484 level broke things. I've arranged for the value of $(MAKE) to be passed
2485 from the Makefile to this script so that it can call the same version of
2489 A note about Exim versions 4.44 and 4.50
2490 ----------------------------------------
2492 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2493 changes of various kinds. As a consequence, a big documentation update was
2494 needed. This delayed the release for rather longer than seemed good, especially
2495 in the light of a couple of (minor) security issues. Therefore, the changes
2496 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2497 release. So 4.44 and 4.50 are in effect two different branches that both start
2500 I have left the 4.50 change log unchanged; it contains all the changes since
2501 4.43. The change log for 4.44 is below; many of its items are identical to
2502 those for 4.50. This seems to be the most sensible way to preserve the
2503 historical information.
2509 1. Minor wording change to the doc/README.SIEVE file.
2511 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2512 computation of the current number of files was incorrect.
2514 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2515 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2518 4. Give more explanation in the error message when the command for a transport
2519 filter fails to execute.
2521 5. There are several places where Exim runs a non-Exim command in a
2522 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2523 was being done only for the command run by the queryprogram router. It is
2524 now done for all such subprocesses. The other cases are: ${run, transport
2525 filters, and the commands run by the lmtp and pipe transports.
2527 6. Added CONFIGURE_GROUP build-time option.
2529 7. Some older OS have a limit of 256 on the maximum number of file
2530 descriptors. Exim was using setrlimit() to set 1000 as a large value
2531 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2532 systems. I've change it so that if it can't get 1000, it tries for 256.
2534 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2535 was an oversight, and furthermore, ever since the addition of extra
2536 controls (e.g. 4.43/32), the checks on when to allow different forms of
2537 "control" were broken. There should now be diagnostics for all cases when a
2538 control that does not make sense is encountered.
2540 9. Added the /retain_sender option to "control=submission".
2542 10. $recipients is now available in the predata ACL (oversight).
2544 11. Tidy the search cache before the fork to do a delivery from a message
2545 received from the command line. Otherwise the child will trigger a lookup
2546 failure and thereby defer the delivery if it tries to use (for example) a
2547 cached ldap connection that the parent has called unbind on.
2549 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2550 of $address_data from the recipient verification was clobbered by the
2551 sender verification.
2553 13. The value of address_data from a sender verification is now available in
2554 $sender_address_data in subsequent conditions in the ACL statement.
2556 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2558 15. Added a new option "connect=<time>" to callout options, to set a different
2561 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2562 was its contents. (It was OK if the option was not defined at all.)
2564 17. A "Completed" log line is now written for messages that are removed from
2565 the spool by the -Mrm option.
2567 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2568 information about exactly what failed.
2570 19. Added -dd to debug only the daemon process.
2572 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2573 handles timeouts, both on the server side and network timeouts. Renamed the
2574 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2576 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2577 It is now set to "smtps".
2579 22. $host_address is now set to the target address during the checking of
2580 ignore_target_hosts.
2582 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2583 being passed; this would have caused $sender_host_name to have been used if
2584 matching the list had actually called for a host name (not very likely,
2585 since this list is usually IP addresses). A host name is now passed as
2588 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2589 code that specifies a non-restarting handler (typically sigaction() in
2590 modern systems) in an attempt to fix a rare and obscure crash bug.
2592 25. Narrowed the window for a race in the daemon that could cause it to ignore
2593 SIGCHLD signals. This is not a major problem, because they are used only to
2594 wake it up if nothing else does.
2596 26. A malformed maildirsize file could cause Exim to calculate negative values
2597 for the mailbox size or file count. Odd effects could occur as a result.
2598 The maildirsize information is now recalculated if the size or filecount
2601 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2602 support for a long time. Removed HAVE_SYS_VFS_H.
2604 28. Installed the latest version of exipick from John Jetmore.
2606 29. In an address list, if the pattern was not a regular expression, an empty
2607 subject address (from a bounce message) matched only if the pattern was an
2608 empty string. Non-empty patterns were not even tested. This was the wrong
2609 because it is perfectly reasonable to use an empty address as part of a
2610 database query. An empty address is now tested by patterns that are
2611 lookups. However, all the other forms of pattern expect the subject to
2612 contain a local part and a domain, and therefore, for them, an empty
2613 address still always fails if the pattern is not itself empty.
2615 30. Exim went into a mad DNS loop when attempting to do a callout where the
2616 host was specified on an smtp transport, and looking it up yielded more
2617 than one IP address.
2619 31. Re-factored the code for checking spool and log partition space into a
2620 function that finds that data and another that does the check. The former
2621 is then used to implement four new variables: $spool_space, $log_space,
2622 $spool_inodes, and $log_inodes.
2624 32. The RFC2047 encoding function was originally intended for short strings
2625 such as real names; it was not keeping to the 75-character limit for
2626 encoded words that the RFC imposes. It now respects the limit, and
2627 generates multiple encoded words if necessary. To be on the safe side, I
2628 have increased the buffer size for the ${rfc2047: expansion operator from
2631 33. It is now permitted to omit both strings after an "if" condition; if the
2632 condition is true, the result is "true". As before, when the second string
2633 is omitted, a false condition yields an empty string. This makes it less
2634 cumbersome to write custom ACL and router conditions.
2636 34. Failure to deliver a bounce message always caused it to be frozen, even if
2637 there was an errors_to setting on the router. The errors_to setting is now
2640 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2641 canonical form (fully expanded) before being placed in
2642 $sender_host_address.
2644 36. The table in the code that translates DNS record types into text (T_A to
2645 "A" for instance) was missing entries for NS and CNAME. It is just possible
2646 that this could have caused confusion if both these types were looked up
2647 for the same domain, because the text type is used as part of Exim's
2648 per-process caching. But the chance of anyone hitting this buglet seems
2651 37. The dnsdb lookup has been extended in a number of ways.
2653 (1) There is a new type, "zns", which walks up the domain tree until it
2654 finds some nameserver records. It should be used with care.
2656 (2) There is a new type, "mxh", which is like "mx" except that it returns
2657 just the host names, not the priorities.
2659 (3) It is now possible to give a list of domains (or IP addresses) to be
2660 looked up. The behaviour when one of the lookups defers can be
2661 controlled by a keyword.
2663 (4) It is now possible to specify the separator character for use when
2664 multiple records are returned.
2666 38. The dnslists ACL condition has been extended: it is now possible to supply
2667 a list of IP addresses and/or domains to be looked up in a particular DNS
2670 39. Added log_selector=+queue_time_overall.
2672 40. When running the queue in the test harness, wait just a tad after forking a
2673 delivery process, to get repeatability of debugging output.
2675 41. Include certificate and key file names in error message when GnuTLS fails
2676 to set them up, because the GnuTLS error message doesn't include the name
2677 of the failing file when there is a problem reading it.
2679 42. Allow both -bf and -bF in the same test run.
2681 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2683 44. The "Exiscan patch" is now merged into the mainline Exim source.
2685 45. Sometimes the final signoff response after QUIT could fail to get
2686 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2687 < 0 before doing a fflush(). This bug looks as though it goes back to the
2688 introduction of TLS in release 3.20, but "sometimes" must have been rare
2689 because the tests only now provoked it.
2691 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2692 (this can affect the format of dates).
2694 47. exim_tidydb, when checking for the continued existence of a message for
2695 which it has found a message-specific retry record, was not finding
2696 messages that were in split spool directories. Consequently, it was
2697 deleting retry records that should have stayed in existence.
2699 48. Steve fixed some bugs in eximstats.
2701 49. The SPA authentication driver was not abandoning authentication and moving
2702 on to the next authenticator when an expansion was forced to fail,
2703 contradicting the general specification for all authenticators. Instead it
2704 was generating a temporary error. It now behaves as specified.
2706 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2707 (the order specifies the preference for clients). The order is now AES256,
2708 AES128, 3DES, ARCFOUR128.
2710 51. Small patch to Sieve code - explicitly set From: when generating an
2713 52. Exim crashed if a remote delivery caused a very long error message to be
2714 recorded - for instance if somebody sent an entire SpamAssassin report back
2715 as a large number of 550 error lines. This bug was coincidentally fixed by
2716 increasing the size of one of Exim's internal buffers (big_buffer) that
2717 happened as part of the Exiscan merge. However, to be on the safe side, I
2718 have made the code more robust (and fixed the comments that describe what
2721 53. Now that there can be additional text after "Completed" in log lines (if
2722 the queue_time_overall log selector is set), a one-byte patch to exigrep
2723 was needed to allow it to recognize "Completed" as not the last thing in
2726 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2727 patch that reportedly fixes this has been added. I am not expert enough to
2728 create a test for it. This is what the patch creator wrote:
2730 "I found a little strange behaviour of ldap code when working with
2731 Windows 2003 AD Domain, where users was placed in more than one
2732 Organization Units. When I tried to give exim partial DN, the exit code
2733 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2734 But simultaneously result of request was absolutely normal ldap result,
2735 so I produce this patch..."
2737 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2738 REFERENCE, so I have modified the code to exclude the patch when that macro
2741 55. Some experimental protocols are using DNS PTR records for new purposes. The
2742 keys for these records are domain names, not reversed IP addresses. The
2743 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2744 leaves it alone. Component reversal etc. now happens only for IP addresses.
2747 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2749 57. Double the size of the debug message buffer (to 2048) so that more of very
2750 long debug lines gets shown.
2752 58. The exicyclog utility now does better if the number of log files to keep
2753 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2755 59. Two changes related to the smtp_active_hostname option:
2757 (1) $smtp_active_hostname is now available as a variable.
2758 (2) The default for smtp_banner uses $smtp_active_hostname instead
2759 of $primary_hostname.
2761 60. The host_aton() function is supposed to be passed a string that is known
2762 to be a valid IP address. However, in the case of IPv6 addresses, it was
2763 not checking this. This is a hostage to fortune. Exim now panics and dies
2764 if the condition is not met. A case was found where this could be provoked
2765 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2766 components; fortuitously, this particular loophole had already been fixed
2767 by change 4.50/55 above.
2769 If there are any other similar loopholes, the new check in host_aton()
2770 itself should stop them being exploited. The report I received stated that
2771 data on the command line could provoke the exploit when Exim was running as
2772 exim, but did not say which command line option was involved. All I could
2773 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2774 running as the user.
2777 61. There was a buffer overflow vulnerability in the SPA authentication code
2778 (which came originally from the Samba project). I have added a test to the
2779 spa_base64_to_bits() function which I hope fixes it.
2782 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2783 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2785 63. The daemon start-up calls getloadavg() while still root for those OS that
2786 need the first call to be done as root, but it missed one case: when
2787 deliver_queue_load_max is set with deliver_drop_privilege. This is
2788 necessary for the benefit of the queue runner, because there is no re-exec
2789 when deliver_drop_privilege is set.
2791 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2792 This has been fixed.
2794 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2795 was in use, was not putting the data itself into the right store pool;
2796 consequently, it could be overwritten for a subsequent message in the same
2797 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2800 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2802 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2803 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2804 the function were treating the return as a boolean value, which happened to
2805 work because 0=false and not-0=true, but is not correct code.
2807 68. The host_aton() function was not handling scoped IPv6 addresses (those
2808 with, for example, "%eth0" on the end) correctly.
2810 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2811 negated items (that is, ~something) in unsigned ints. Some compilers
2812 apparently mutter when there is no cast.
2814 70. If an address verification called from an ACL failed, and did not produce a
2815 user-specific message (i.e. there was only a "system" message), nothing was
2816 put in $acl_verify_message. In this situation, it now puts the system
2819 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2820 session; change 4.31/43 added the unwanted input to the log line - except
2821 that it did not do this in the start of session case. It now does.
2823 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2824 This is wrong and can cause the other end to generate a synchronization
2825 error if it is another Exim or anything else that does the synchronization
2826 check. A QUIT command is no longer sent after a timeout.
2828 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2829 during host lookups.
2831 74. The defer_ok option of callout verification was not working if it was used
2832 when verifying addresses in header lines, that is, for this case:
2834 verify = header_sender/callout=defer_ok
2836 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2837 those file descriptors could be used for SMTP connections. If anything
2838 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2839 could be sent to the SMTP client, causing chaos. The daemon now opens
2840 stdin, stdout, and stderr to /dev/null when it puts itself into the
2843 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2844 log by default. The user can override this with suitable Perl magic.
2846 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2847 the log message when discard triggers, was not working for the DATA ACL or
2848 for the non-SMTP ACL.
2850 78. Error message wording change in sieve.c.
2852 79. If smtp_accept_max_per_host was set, the number of connections could be
2853 restricted to fewer than expected, because the daemon was trying to set up
2854 a new connection before checking whether the processes handling previous
2855 connections had finished. The check for completed processes is now done
2856 earlier. On busy systems, this bug wouldn't be noticed because something
2857 else would have woken the daemon, and it would have reaped the completed
2860 80. If a message was submitted locally by a user whose login name contained one
2861 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2862 It caused a spool format error. I have fixed the spool reading code. A
2863 related problem was that the "from" clause in the Received: line became
2864 illegal because of the space(s). It is now covered by ${quote_local_part.
2866 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2869 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2871 83. Patch from Sieve maintainer to fix unterminated string problem in
2872 "vacation" handling.
2874 84. Some minor changes to the Linux configuration files to help with other
2875 OS variants using glibc.
2877 85. One more patch for Sieve to update vacation handling to latest spec.
2880 ----------------------------------------------------
2881 See the note above about the 4.44 and 4.50 releases.
2882 ----------------------------------------------------
2888 1. Change 4.43/35 introduced a bug that caused file counts to be
2889 incorrectly computed when quota_filecount was set in an appendfile
2892 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2893 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2896 3. Give more explanation in the error message when the command for a transport
2897 filter fails to execute.
2899 4. There are several places where Exim runs a non-Exim command in a
2900 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2901 was being done only for the command run by the queryprogram router. It is
2902 now done for all such subprocesses. The other cases are: ${run, transport
2903 filters, and the commands run by the lmtp and pipe transports.
2905 5. Some older OS have a limit of 256 on the maximum number of file
2906 descriptors. Exim was using setrlimit() to set 1000 as a large value
2907 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2908 systems. I've change it so that if it can't get 1000, it tries for 256.
2910 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2911 was an oversight, and furthermore, ever since the addition of extra
2912 controls (e.g. 4.43/32), the checks on when to allow different forms of
2913 "control" were broken. There should now be diagnostics for all cases when a
2914 control that does not make sense is encountered.
2916 7. $recipients is now available in the predata ACL (oversight).
2918 8. Tidy the search cache before the fork to do a delivery from a message
2919 received from the command line. Otherwise the child will trigger a lookup
2920 failure and thereby defer the delivery if it tries to use (for example) a
2921 cached ldap connection that the parent has called unbind on.
2923 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2924 of $address_data from the recipient verification was clobbered by the
2925 sender verification.
2927 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2928 was its contents. (It was OK if the option was not defined at all.)
2930 11. A "Completed" log line is now written for messages that are removed from
2931 the spool by the -Mrm option.
2933 12. $host_address is now set to the target address during the checking of
2934 ignore_target_hosts.
2936 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2937 being passed; this would have caused $sender_host_name to have been used if
2938 matching the list had actually called for a host name (not very likely,
2939 since this list is usually IP addresses). A host name is now passed as
2942 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2943 code that specifies a non-restarting handler (typically sigaction() in
2944 modern systems) in an attempt to fix a rare and obscure crash bug.
2946 15. Narrowed the window for a race in the daemon that could cause it to ignore
2947 SIGCHLD signals. This is not a major problem, because they are used only to
2948 wake it up if nothing else does.
2950 16. A malformed maildirsize file could cause Exim to calculate negative values
2951 for the mailbox size or file count. Odd effects could occur as a result.
2952 The maildirsize information is now recalculated if the size or filecount
2955 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2956 support for a long time. Removed HAVE_SYS_VFS_H.
2958 18. Updated exipick to current release from John Jetmore.
2960 19. Allow an empty sender to be matched against a lookup in an address list.
2961 Previously the only cases considered were a regular expression, or an
2964 20. Exim went into a mad DNS lookup loop when doing a callout where the
2965 host was specified on the transport, if the DNS lookup yielded more than
2968 21. The RFC2047 encoding function was originally intended for short strings
2969 such as real names; it was not keeping to the 75-character limit for
2970 encoded words that the RFC imposes. It now respects the limit, and
2971 generates multiple encoded words if necessary. To be on the safe side, I
2972 have increased the buffer size for the ${rfc2047: expansion operator from
2975 22. Failure to deliver a bounce message always caused it to be frozen, even if
2976 there was an errors_to setting on the router. The errors_to setting is now
2979 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2980 canonical form (fully expanded) before being placed in
2981 $sender_host_address.
2983 24. Updated eximstats to version 1.33
2985 25. Include certificate and key file names in error message when GnuTLS fails
2986 to set them up, because the GnuTLS error message doesn't include the name
2987 of the failing file when there is a problem reading it.
2989 26. Expand error message when OpenSSL has problems setting up cert/key files.
2992 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2993 (this can affect the format of dates).
2995 28. exim_tidydb, when checking for the continued existence of a message for
2996 which it has found a message-specific retry record, was not finding
2997 messages that were in split spool directories. Consequently, it was
2998 deleting retry records that should have stayed in existence.
3000 29. eximstats updated to version 1.35
3001 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3002 1.35 - bugfix such that pie charts by volume are generated correctly
3004 30. The SPA authentication driver was not abandoning authentication and moving
3005 on to the next authenticator when an expansion was forced to fail,
3006 contradicting the general specification for all authenticators. Instead it
3007 was generating a temporary error. It now behaves as specified.
3009 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3010 (the order specifies the preference for clients). The order is now AES256,
3011 AES128, 3DES, ARCFOUR128.
3013 31. Small patch to Sieve code - explicitly set From: when generating an
3016 32. Exim crashed if a remote delivery caused a very long error message to be
3017 recorded - for instance if somebody sent an entire SpamAssassin report back
3018 as a large number of 550 error lines. This bug was coincidentally fixed by
3019 increasing the size of one of Exim's internal buffers (big_buffer) that
3020 happened as part of the Exiscan merge. However, to be on the safe side, I
3021 have made the code more robust (and fixed the comments that describe what
3024 33. Some experimental protocols are using DNS PTR records for new purposes. The
3025 keys for these records are domain names, not reversed IP addresses. The
3026 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3027 leaves it alone. Component reversal etc. now happens only for IP addresses.
3030 34. The host_aton() function is supposed to be passed a string that is known
3031 to be a valid IP address. However, in the case of IPv6 addresses, it was
3032 not checking this. This is a hostage to fortune. Exim now panics and dies
3033 if the condition is not met. A case was found where this could be provoked
3034 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3035 components; fortuitously, this particular loophole had already been fixed
3036 by change 4.50/55 or 4.44/33 above.
3038 If there are any other similar loopholes, the new check in host_aton()
3039 itself should stop them being exploited. The report I received stated that
3040 data on the command line could provoke the exploit when Exim was running as
3041 exim, but did not say which command line option was involved. All I could
3042 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3043 running as the user.
3046 35. There was a buffer overflow vulnerability in the SPA authentication code
3047 (which came originally from the Samba project). I have added a test to the
3048 spa_base64_to_bits() function which I hope fixes it.
3051 36. The daemon start-up calls getloadavg() while still root for those OS that
3052 need the first call to be done as root, but it missed one case: when
3053 deliver_queue_load_max is set with deliver_drop_privilege. This is
3054 necessary for the benefit of the queue runner, because there is no re-exec
3055 when deliver_drop_privilege is set.
3057 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3058 was in use, was not putting the data itself into the right store pool;
3059 consequently, it could be overwritten for a subsequent message in the same
3060 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3063 38. Sometimes the final signoff response after QUIT could fail to get
3064 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3065 < 0 before doing a fflush(). This bug looks as though it goes back to the
3066 introduction of TLS in release 3.20, but "sometimes" must have been rare
3067 because the tests only now provoked it.
3073 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3074 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3075 Now it returns an integer. A number of calls were still expecting a T/F
3076 return. Fortuitously, in all cases, the tests worked in OK situations,
3077 which is the norm. However, things would have gone wrong on any write
3078 failures on the smtp file descriptor. This function is used when sending
3079 messages over SMTP and also when doing verify callouts.
3081 2. When Exim is called to do synchronous delivery of a locally submitted
3082 message (the -odf or -odi options), it no longer closes stderr before doing
3085 3. Implemented the mua_wrapper option.
3087 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3089 5. Implemented the functions header_remove(), header_testname(),
3090 header_add_at_position(), and receive_remove_recipient(), and exported them
3093 6. If an ACL "warn" statement specified the addition of headers, Exim already
3094 inserted X-ACL-Warn: at the start if there was no header name. However, it
3095 was not making this test for the second and subsequent header lines if
3096 there were newlines in the string. This meant that an invalid header could
3097 be inserted if Exim was badly configured.
3099 7. Allow an ACL "warn" statement to add header lines at the start or after all
3100 the Received: headers, as well as at the end.
3102 8. Added the rcpt_4xx retry error code.
3104 9. Added postmaster_mailfrom=xxx to callout verification option.
3106 10. Added mailfrom=xxxx to the callout verification option, for verify=
3109 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3110 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3112 12. Inserted some casts to stop certain compilers warning when using pointer
3113 differences as field lengths or precisions in printf-type calls (mostly
3114 affecting debugging statements).
3116 13. Added optional readline() support for -be (dynamically loaded).
3118 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3119 same clock tick as a message's arrival, so that its received time was the
3120 same as the "first fail" time on the retry record, and that message
3121 remained on the queue past the ultimate address timeout, every queue runner
3122 would try a delivery (because it was past the ultimate address timeout) but
3123 after another failure, the ultimate address timeout, which should have then
3124 bounced the address, did not kick in. This was a "< instead of <=" error;
3125 in most cases the first failure would have been in the next clock tick
3126 after the received time, and all would be well.
3128 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3129 being recognized when the domain list was tested by the match_domain
3130 condition in an expansion string.
3132 16. Added the ${str2b64: operator.
3134 17. Exim was always calling setrlimit() to set a large limit for the number of
3135 processes, without checking whether the existing limit was already
3136 adequate. (It did check for the limit on file descriptors.) Furthermore,
3137 errors from getrlimit() and setrlimit() were being ignored. Now they are
3138 logged to the main and panic logs, but Exim does carry on, to try to do its
3139 job under whatever limits there are.
3141 18. Imported PCRE 5.0.
3143 19. Trivial typo in log message " temporarily refused connection" (the leading
3146 20. If the log selector return_path_on_delivery was set and an address was
3147 redirected to /dev/null, the delivery process crashed because it assumed
3148 that a return path would always be set for a "successful" delivery. In this
3149 case, the whole delivery is bypassed as an optimization, and therefore no
3152 21. Internal re-arrangement: the function for sending a challenge and reading
3153 a response while authentication was assuming a zero-terminated challenge
3154 string. It's now changed to take a pointer and a length, to allow for
3155 binary data in such strings.
3157 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3159 23. Exim was not respecting finduser_retries when seeking the login of the
3160 uid under which it was called; it was always trying 10 times. (The default
3161 setting of finduser_retries is zero.) Also, it was sleeping after the final
3162 failure, which is pointless.
3164 24. Implemented tls_on_connect_ports.
3166 25. Implemented acl_smtp_predata.
3168 26. If the domain in control=submission is set empty, Exim assumes that the
3169 authenticated id is a complete email address when it generates From: or
3170 Sender: header lines.
3172 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3173 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3174 chown and chgrp in /bin and hostname in /usr/bin.
3176 28. Exim was keeping the "process log" file open after each use, just as it
3177 does for the main log. This opens the possibility of it remaining open for
3178 long periods when the USR1 signal hits a daemon. Occasional processlog
3179 errors were reported, that could have been caused by this. Anyway, it seems
3180 much more sensible not to leave this file open at all, so that is what now
3183 29. The long-running daemon process does not normally write to the log once it
3184 has entered its main loop, and it closes the log before doing so. This is
3185 so that log files can straightforwardly be renamed and moved. However,
3186 there are a couple of unusual error situations where the daemon does write
3187 log entries, and I had neglected to close the log afterwards.
3189 30. The text of an SMTP error response that was received during a remote
3190 delivery was being truncated at 512 bytes. This is too short for some of
3191 the long messages that one sometimes sees. I've increased the limit to
3194 31. It is now possible to make retry rules that apply only when a message has a
3195 specific sender, in particular, an empty sender.
3197 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3198 it possible to be selective about when SMTP synchronization is enforced.
3200 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3202 32. Implemented hosts_connection_nolog.
3204 33. Added an ACL for QUIT.
3206 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3209 35. Added mailbox_size and mailbox_filecount to appendfile.
3211 36. Added control = no_multiline_responses to ACLs.
3213 37. There was a bug in the logic of the code that waits for the clock to tick
3214 in the case where the clock went backwards by a substantial amount such
3215 that the microsecond fraction of "now" was more than the microsecond
3216 fraction of "then" (but the whole seconds number was less).
3218 38. Added support for the libradius Radius client library this is found on
3219 FreeBSD (previously only the radiusclient library was supported).
3225 1. When certain lookups returned multiple values in the form name=value, the
3226 quoting of the values was not always being done properly. Specifically:
3227 (a) If the value started with a double quote, but contained no whitespace,
3229 (b) If the value contained whitespace other than a space character (i.e.
3230 tabs or newlines or carriage returns) it was not quoted.
3231 This fix has been applied to the mysql and pgsql lookups by writing a
3232 separate quoting function and calling it from the lookup code. The fix
3233 should probably also be applied to nisplus, ibase and oracle lookups, but
3234 since I cannot test any of those, I have not disturbed their existing code.
3236 2. A hit in the callout cache for a specific address caused a log line with no
3237 reason for rejecting RCPT. Now it says "Previous (cached) callout
3238 verification failure".
3240 3. There was an off-by-one bug in the queryprogram router. An over-long
3241 return line was truncated at 256 instead of 255 characters, thereby
3242 overflowing its buffer with the terminating zero. As well as fixing this, I
3243 have increased the buffer size to 1024 (and made a note to document this).
3245 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3246 when Exim is waiting for an SMTP response from a remote server, Exim
3247 restarts its select() call on the socket, thereby resetting its timeout.
3248 This is not a problem when such interrupts are rare. Somebody set up a cron
3249 job to run exiwhat every 2 minutes, which is less than the normal select()
3250 timeout (5 or 10 minutes). This meant that the select() timeout never
3251 kicked in because it was always reset. I have fixed this by comparing the
3252 time when an interrupt arrives with the time at the start of the first call
3253 to select(). If more time than the timeout has elapsed, the interrupt is
3254 treated as a timeout.
3256 5. Some internal re-factoring in preparation for the addition of Sieve
3257 extensions (by MH). In particular, the "personal" test is moved to a
3258 separate function, and given an option for scanning Cc: and Bcc: (which is
3259 not set for Exim filters).
3261 6. When Exim created an email address using the login of the caller as the
3262 local part (e.g. when creating a From: or Sender: header line), it was not
3263 quoting the local part when it contained special characters such as @.
3265 7. Installed new OpenBSD configuration files.
3267 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3268 try to make them clearer.
3270 9. Callout options, other than the timeout value, were being ignored when
3271 verifying sender addresses in header lines. For example, when using
3273 verify = header_sender/callout=no_cache
3275 the cache was (incorrectly) being used.
3277 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3278 only the Cygwin environment.
3280 11. When return_path_on_delivery was set as a log selector, if different remote
3281 addresses in the same message used different return paths and parallel
3282 remote delivery occurred, the wrong values would sometimes be logged.
3283 (Whenever a remote delivery process finished, the return path value from
3284 the most recently started remote delivery process was logged.)
3286 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3287 lines when AUTH and/or TLS are in use. This is the "received protocol"
3288 field. Exim used to use "asmtp" for authenticated SMTP, without any
3289 indication (in the protocol name) for TLS use. Now it follows the RFC and
3290 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3291 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3292 names appear in log lines as well as in Received: header lines.
3294 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3295 extensions, and comparison tests, and to fix some bugs.
3297 14. Changes to the "personal" filter test:
3299 (1) The test was buggy in that it was just doing the equivalent of
3300 "contains" tests on header lines. For example, if a user's address was
3301 anne@some.where, the "personal" test would incorrectly be true for
3303 To: susanne@some.where
3305 This test is now done by extracting each address from the header in turn,
3306 and checking the entire address. Other tests that are part of "personal"
3307 are now done using regular expressions (for example, to check local parts
3308 of addresses in From: header lines).
3310 (2) The list of non-personal local parts in From: addresses has been
3311 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3312 taken from the Sieve specification recommendations.
3314 (3) If the message contains any header line starting with "List-" it is
3315 treated as non-personal.
3317 (4) The test for "circular" in the Subject: header line has been removed
3318 because it now seems ill-conceived.
3320 15. Minor typos in src/EDITME comments corrected.
3322 16. Installed latest exipick from John Jetmore.
3324 17. If headers_add on a router specified a text string that was too long for
3325 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3326 of string_sprintf() is now avoided.
3328 18. $message_body_size was not set (it was always zero) when running the DATA
3329 ACL and the local_scan() function.
3331 19. For the "mail" command in an Exim filter, no default was being set for
3332 the once_repeat time, causing a random time value to be used if "once" was
3333 specified. (If the value happened to be <= 0, no repeat happened.) The
3334 default is now 0s, meaning "never repeat". The "vacation" command was OK
3335 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3336 (I found it when inspecting the code).
3338 20. There is now an overall timeout for performing a callout verification. It
3339 defaults to 4 times the callout timeout, which applies to individual SMTP
3340 commands during the callout. The overall timeout applies when there is more
3341 than one host that can be tried. The timeout is checked before trying the
3342 next host. This prevents very long delays if there are a large number of
3343 hosts and all are timing out (e.g. when the network connections are timing
3344 out). The value of the overall timeout can be changed by specifying an
3345 additional sub-option for "callout", called "maxwait". For example:
3347 verify = sender/callout=5s,maxwait=20s
3349 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3350 to the end before writing, but this should make it even safer).
3352 22. Exim was forgetting that it had advertised PIPELINING for the second and
3353 subsequent messages on an SMTP connection. It was also not resetting its
3354 memory on STARTTLS and an internal HELO.
3356 23. When Exim logs an SMTP synchronization error within a session, it now
3357 records whether PIPELINING has been advertised or not.
3359 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3360 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3361 rather than long int.
3363 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3365 26. Added the never_mail option to autoreply.
3371 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3372 crash if the getsockname() call failed; this can happen if a connection is
3373 closed very soon after it is established. The problem was simply in the
3374 order in which certain operations were done, causing Exim to try to write
3375 to the SMTP stream before it had set up the file descriptor. The bug has
3376 been fixed by making things happen in the correct order.
3382 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3383 before the connection was closed, thus losing the rejection response.
3385 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3386 some early Solaris releases, but causes trouble in current releases where
3387 socklen_t is defined.
3389 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3392 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3395 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3396 that releasing the top of it at the end releases what was used for sub-
3397 expansions (unless the block got too big). However, discard this block if
3398 the first thing is a variable or header, so that we can use its block when
3399 it is dynamic (useful for very large $message_headers, for example).
3401 6. Lookups now cache *every* query, not just the most recent. A new, separate
3402 store pool is used for this. It can be recovered when all lookup caches are
3403 flushed. Lookups now release memory at the end of their result strings.
3404 This has involved some general refactoring of the lookup sources.
3406 7. Some code has been added to the store_xxx() functions to reduce the amount
3407 of flapping under certain conditions.
3409 8. log_incoming_interface used to affect only the <= reception log lines. Now
3410 it causes the local interface and port to be added to several more SMTP log
3411 lines, for example "SMTP connection from", and rejection lines.
3413 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3415 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3417 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3418 could be overwritten at the end of the current message (or the start of a
3419 new message if it was set in a HELO ACL). The value is now preserved for
3420 the duration of the SMTP connection.
3422 12. If a transport had a headers_rewrite setting, and a matching header line
3423 contained an unqualified address, that address was qualified, even if it
3424 did not match any rewriting rules. The underlying bug was that the values
3425 of the flags that permit the existence of unqualified sender and recipient
3426 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3427 non-local messages, and by -bnq for local messages) were not being
3428 preserved with the message after it was received.
3430 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3431 "next input=" as part of the text comprising the host identity instead of
3432 the correct text. The code was using the same buffer for two different
3433 strings. However, depending on which order the printing function evaluated
3434 its arguments, the bug did not always show up. Under Linux, for example, my
3435 test suite worked just fine.
3437 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3438 doesn't work with some older versions of Perl. It has been changed to "my",
3439 which in any case is probably the better facility to use.
3441 15. A really picky compiler found some instances of statements for creating
3442 error messages that either had too many or two few arguments for the format
3445 16. The size of the buffer for calls to the DNS resolver has been increased
3446 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3447 for addresses that have a lot of PTR records. This alleviates a problem; it
3448 does not fully solve it.
3450 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3451 buffer now truncates the list and logs the incident, which is the same
3452 action as happens when Exim is looking up a host name and its aliases.
3453 Previously in this situation something unpredictable would happen;
3454 sometimes it was "internal error: store_reset failed".
3456 18. If a server dropped the connection unexpectedly when an Exim client was
3457 using GnuTLS and trying to read a response, the client delivery process
3458 crashed while trying to generate an error log message.
3460 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3461 string, for example:
3463 warn message = H1: something\nH2: something
3465 the text was added as a single header line from Exim's point of view
3466 though it ended up OK in the delivered message. However, searching for the
3467 second and subsequent header lines using $h_h2: did not work. This has been
3468 fixed. Similarly, if a system filter added multiple headers in this way,
3469 the routers could not see them.
3471 20. Expanded the error message when iplsearch is called with an invalid key to
3472 suggest using net-iplsearch in a host list.
3474 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3475 ACLs are no longer actually imposed (and a message to that effect is
3478 22. If a "gecos" field in a passwd entry contained escaped characters, in
3479 particular, if it contained a \" sequence, Exim got it wrong when building
3480 a From: or a Sender: header from that name. A second bug also caused
3481 incorrect handling when an unquoted " was present following a character
3482 that needed quoting.
3484 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3485 was not being matched caselessly.
3487 24. Arranged for all hyphens in the exim.8 source to be escaped with
3490 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3491 properly. Recipient callout cache records were still being keyed to include
3492 the sender, even when use_sender was set false. This led to far more
3493 callouts that were necessary. The sender is no longer included in the key
3494 when use_sender is false.
3496 26. Added "control = submission" modifier to ACLs.
3498 27. Added the ${base62d: operator to decode base 62 numbers.
3500 28. dnsdb lookups can now access SRV records.
3502 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3503 the configuration file.
3505 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3506 (-v) mode. This makes the output for a verbose queue run more intelligible.
3508 31. Added a use_postmaster feature to recipient callouts.
3510 32. Added the $body_zerocount variable, containing the number of binary zero
3511 bytes in the message body.
3513 33. The time of last modification of the "new" subdirectory is now used as the
3514 "mailbox time last read" when there is a quota error for a maildir
3517 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3519 35. Added +ignore_unknown as a special item in host lists.
3521 36. Code for decoding IPv6 addresses in host lists is now included, even if
3522 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3523 address was recognized as an IP address, but was then not correctly decoded
3524 into binary, causing unexpected and incorrect effects when compared with
3531 1. Very minor rewording of debugging text in manualroute to say "list of
3532 hosts" instead of "hostlist".
3534 2. If verify=header_syntax was set, and a header line with an unqualified
3535 address (no domain) and a large number of spaces between the end of the
3536 name and the colon was received, the reception process suffered a buffer
3537 overflow, and (when I tested it) crashed. This was caused by some obsolete
3538 code that should have been removed. The fix is to remove it!
3540 3. When running in the test harness, delay a bit after writing a bounce
3541 message to get a bit more predictability in the log output.
3543 4. Added a call to search_tidyup() just before forking a reception process. In
3544 theory, someone could use a lookup in the expansion of smtp_accept_max_
3545 per_host which, without the tidyup, could leave open a database connection.
3547 5. Added the variables $recipient_data and $sender_data which get set from a
3548 lookup success in an ACL "recipients" or "senders" condition, or a router
3549 "senders" option, similar to $domain_data and $local_part_data.
3551 6. Moved the writing of debug_print from before to after the "senders" test
3554 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3555 problems for message scanning, either using a data ACL, or using
3556 local_scan() because the Received: header was not generated till after they
3557 were called (in order to set the time as the time of reception completion).
3558 I have revised the way this works. The header is now generated after the
3559 body is received, but before the ACL or local_scan() are called. After they
3560 are run, the timestamp in the header is updated.
3566 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3567 before starting a queue runner without re-exec. This happened only when
3568 deliver_drop_privilege was set or when the Exim user was set to root. The
3569 effect of the bug was that timeouts during subsequent deliveries caused
3570 crashes instead of being properly handled. The handler is now left at its
3571 default (and expected) setting.
3573 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3574 message, again when deliver_drop_privilege is set or Exim is run as root.
3575 The bug described in (1) was not present in this case, but the tidying up
3576 of the other signals was missing. I have made the two cases consistent.
3578 3. The ignore_target_hosts setting on a manualroute router was being ignored
3579 for hosts that were looked up using the /MX notation.
3581 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3584 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3585 operated on the sender address. After changing the $sender_address to <>
3586 for the sender address verify, Exim was re-instated it as the original
3587 (before rewriting) address, but remembering that it had rewritten it, so it
3588 wasn't rewriting it again. This bug also had the effect of breaking the
3589 sender address verification caching when the sender address was rewritten.
3591 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3592 This has been changed so that if the ip literal address matches
3593 ignore_target_hosts, the router declines.
3595 7. Added expansion conditions match_domain, match_address, and match_local_
3596 part (NOT match_host).
3598 8. The placeholder for the Received: header didn't have a length field set.
3600 9. Added code to Exim itself and to exim_lock to test for a specific race
3601 condition that could lead to file corruption when using MBX delivery. The
3602 issue is with the lockfile that is created in /tmp. If this file is removed
3603 after a process has opened it but before that process has acquired a lock,
3604 there is the potential for a second process to recreate the file and also
3605 acquire a lock. This could lead to two Exim processes writing to the file
3606 at the same time. The added code performs the same test as UW imapd; it
3607 checks after acquiring the lock that its file descriptor still refers to
3608 the same named file.
3610 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3611 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3614 11. Added the smtp_active_hostname option. If used, this will typically be made
3615 to depend on the incoming interface address. Because $interface_address is
3616 not set up until the daemon has forked a reception process, error responses
3617 that can happen earlier (such as "too many connections") no longer contain
3620 12. If an expansion in a condition on a "warn" statement fails because a lookup
3621 defers, the "warn" statement is abandoned, and the next ACL statement is
3622 processed. Previously this caused the whole ACL to be aborted.
3624 13. Added the iplsearch lookup type.
3626 14. Added ident_timeout as a log selector.
3628 15. Added tls_certificate_verified as a log selector.
3630 16. Added a global option tls_require_ciphers (compare the smtp transport
3631 option of the same name). This controls incoming TLS connections.
3633 17. I finally figured out how to make tls_require_ciphers do a similar thing
3634 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3635 before starting the TLS session.
3637 18. Tabs are now shown as \t in -bP output.
3639 19. If the log selector return_path_on_delivery was set, Exim crashed when
3640 bouncing a message because it had too many Received: header lines.
3642 20. If two routers both had headers_remove settings, and the first one included
3643 a superfluous trailing colon, the final name in the first list and the
3644 first name in the second list were incorrectly joined into one item (with a
3645 colon in the middle).
3651 1. Added -C and -D options to the exinext utility, mainly to make it easier
3652 to include in the automated testing, but these could be helpful when
3653 multiple configurations are in use.
3655 2. The exinext utility was not formatting the output nicely when there was
3656 an alternate port involved in the retry record key, nor when there was a
3657 message id as well (for retries that were specific to a specific message
3658 and a specific host). It was also confused by IPv6 addresses, because of
3659 the additional colons they contain. I have fixed the IPv4 problem, and
3660 patched it up to do a reasonable job for IPv6.
3662 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3663 delivery, the log line now contains "pipelined" if PIPELINING was used.
3665 4. An SMTP transport process used to panic and die if the bind() call to set
3666 an explicit outgoing interface failed. This has been changed; it is now
3667 treated in the same way as a connect() failure.
3669 5. A reference to $sender_host_name in the part of a conditional expansion
3670 that was being skipped was still causing a DNS lookup. This no longer
3673 6. The def: expansion condition was not recognizing references to header lines
3674 that used bh_ and bheader_.
3676 7. Added the _cache feature to named lists.
3678 8. The code for checking quota_filecount in the appendfile transport was
3679 allowing one more file than it should have been.
3681 9. For compatibility with Sendmail, the command line option
3689 and sets the incoming protocol and host name (for trusted callers). The
3690 host name and its colon can be omitted when only the protocol is to be set.
3691 Note the Exim already has two private options, -pd and -ps, that refer to
3692 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3693 "s", but I don't think that's a major issue.
3695 10. A number of refactoring changes to the code, none of which should affect
3698 (a) The number of logging options was getting close to filling up the
3699 32-bit word that was used as a bit map. I have split them into two classes:
3700 those that are passed in the argument to log_write(), and those that are
3701 only ever tested independently outside of that function. These are now in
3702 separate 32-bit words, so there is plenty of room for expansion again.
3703 There is no change in the user interface or the logging behaviour.
3705 (b) When building, for example, log lines, the code previously used a
3706 macro that called string_cat() twice, in order to add two strings. This is
3707 not really sufficiently general. Furthermore, there was one instance where
3708 it was actually wrong because one of the argument was used twice, and in
3709 one call a function was used. (As it happened, calling the function twice
3710 did not affect the overall behaviour.) The macro has been replaced by a
3711 function that can join an arbitrary number of extra strings onto a growing
3714 (c) The code for expansion conditions now uses a table and a binary chop
3715 instead of a serial search (which was left over from when there were very
3716 few conditions). Also, it now recognizes conditions like "pam" even when
3717 the relevant support is not compiled in: a suitably worded error message is
3718 given if an attempt is made to use such a condition.
3720 11. Added ${time_interval:xxxxx}.
3722 12. A bug was causing one of the ddress fields not to be passed back correctly
3723 from remote delivery subprocesses. The field in question was not being
3724 subsequently used, so this caused to problems in practice.
3726 13. Added new log selectors queue_time and deliver_time.
3728 14. Might have fixed a bug in maildirsizefile handling that threw up
3729 "unexpected character" debug warnings, and recalculated the data
3730 unnecessarily. In any case, I expanded the warning message to give more
3733 15. Added the message "Restricted characters in address" to the statements in
3734 the default ACL that block characters like @ and % in local parts.
3736 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3737 Three changes have been made:
3739 (a) There was a serious bug; a negative response to MAIL caused the whole
3740 recipient domain to be cached as invalid, thereby blocking all messages
3741 to all local parts at the same domain, from all senders. This bug has
3742 been fixed. The domain is no longer cached after a negative response to
3743 MAIL if the sender used is not empty.
3745 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3748 (c) A new callout option, "use_sender" has been added for people who want
3749 the modified behaviour.
3755 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3758 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3759 indeed breaks things for older releases.
3761 3. Added additional logging to the case where there is a problem reading data
3762 from a filter that is running in a subprocess using a pipe, in order to
3763 try to track down a specific problem.
3765 4. Testing facility fudge: when running in the test harness and attempting
3766 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3767 getting "No route to host". Convert this to a timeout.
3769 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3772 6. Some OS don't have socklen_t but use size_t instead. This affects the
3773 fifth argument of getsockopt() amongst other things. This is now
3774 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3775 can be set for individual OS. I have set it for SunOS5, OSF1, and
3776 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3777 some earlier ones do not.
3779 7. Change 4.30/15 was not doing the test caselessly.
3781 8. The standard form for an IPv6 address literal was being rejected by address
3782 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3783 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3784 this, as well as the form without the "IPv6" on the front (but only when
3785 address literals are enabled, of course).
3787 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3789 10. Exim crashed if a message with an empty sender address specified by -f
3790 encountered a router with an errors_to setting. This could be provoked only
3791 by a command such as
3795 where an empty string was supplied; "<>" did not hit this bug.
3797 11. Installed PCRE release 4.5.
3799 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3800 remained set. It is now erased.
3802 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3803 times from message ids (which are base 36 rather than the normal 62).
3805 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3806 were being counted as actual protocol errors, and logged if the log
3807 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3808 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3809 and DATA following a set of rejected RCPTs do not count as protocol errors.
3810 In other words, Exim assumes they were pipelined, though this may not
3811 actually be the case. Of course, in all cases the client gets an
3812 appropriate error code.
3814 15. If a lookup fails in an ACL condition, a message about the failure may
3815 be available; it is used if testing the ACL cannot continue, because most
3816 such messages specify what the cause of the deferral is. However, some
3817 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3818 that caused an old message to be retained and used if a later statement
3819 caused a defer, replacing the real cause of the deferral.
3821 16. If an IP address had so many PTR records that the DNS lookup buffer
3822 was not large enough to hold them, Exim could crash while trying to process
3823 the truncated data. It now detects and logs this case.
3825 17. Further to 4.21/58, another change has been made: if (and only if) the
3826 first line of a message (the first header line) ends with CRLF, a bare LF
3827 in a subsequent header line has a space inserted after it, so as not to
3828 terminate the header.
3830 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3831 unnecessarily, used atoi() instead of strtol(), and didn't check the
3832 termination when getting file sizes from file names by regex.
3834 19. Completely re-implemented the support for maildirsize files, in the light
3835 of a number of problems with the previous contributed implementation
3836 (4.30/29). In particular:
3838 . If the quota is zero, the maildirsize file is maintained, but no quota is
3841 . If the maildir directory does not exist, it is created before any attempt
3842 to write a maildirsize file.
3844 . The quota value in the file is just a cache; if the quota is changed in
3845 the transport, the new value overrides.
3847 . A regular expression is available for excluding directories from the
3850 20. The autoreply transport checks the characters in options that define the
3851 message's headers; it allows continued headers, but it was checking with
3852 isspace() after an embedded newline instead of explicitly looking for a
3855 21. If all the "regular" hosts to which an address was routed had passed their
3856 expiry times, and had not reached their retry times, the address was
3857 bounced, even if fallback hosts were defined. Now Exim should go on to try
3860 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3861 equivalent code in the SMTP transport. Some hosts send humungous responses
3862 to HELO/EHLO, more than 1024 it seems.
3864 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3865 gives compiler warnings in some environments. I've now done it "properly",
3868 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3869 (because of problems with the built-in one) was declared to return uschar *
3870 instead of char *, causing compiler failure.
3872 25. Fixed a file descriptor leak when processing alias/forward files.
3874 26. Fixed a minor format string issue in dbfn.c.
3876 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3878 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3879 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3882 29. When a sender address is verified, it is cached, to save repeating the test
3883 when there is more than one recipient in a message. However, when the
3884 verification involves a callout, it is possible for different callout
3885 options to be set for different recipients. It is too complicated to keep
3886 track of this in the cache, so now Exim always runs a verification when a
3887 callout is required, relying on the callout cache for the optimization.
3888 The overhead is duplication of the address routing, but this should not be
3891 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3892 to be verified with callout=postmaster, and the main callout worked but the
3893 postmaster check failed, the verification correctly failed. However, if a
3894 subsequent RCPT command asked for sender verification *without* the
3895 postmaster check, incorrect caching caused this verification also to fail,
3898 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3899 it was not caching the DNS options (qualify_single, search_parents) that
3900 were used when the lookup failed. A subsequent lookup with different
3901 options therefore always gave the same answer, though there were cases
3902 where it should not have. (Example: a "domains = !$mx_any" option on a
3903 dnslookup router: the "domains" option is always processed without any
3904 widening, but the router might have qualify_single set.) Now Exim uses the
3905 cached value only when the same options are set.
3907 32. Added John Jetmore's "exipick" utility to the distribution.
3909 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3910 than a timeout (e.g. a certificate is required, and is not provided), an
3911 Exim server now closes the connection immediately. Previously it waited for
3912 the client to close - but if the client is SSL, it seems that they each
3913 wait for each other, leading to a delay before one of them times out.
3915 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3916 maintained 0.8.x compatibility because I don't think many are using it, and
3917 it is clearly obsolete.
3919 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3922 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3923 client certificate was expired. A simple patch fixes this, though I don't
3924 understand the full logic of why the verify callback is called multiple
3927 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3928 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3929 which causes problems with some clients (such as the Certicom SSL Plus
3930 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3931 disables the coutermeasure allowing Eudora to connect."
3933 38. Exim was not checking that a write() to a log file succeeded. This could
3934 lead to Bad Things if a log got too big, in particular if it hit a file
3935 size limit. Exim now panics and dies if it cannot write to a log file, just
3936 as it does if it cannot open a log file.
3938 39. Modified OS/Makefile-Linux so that it now contains
3940 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3942 The two -D definitions ensure that Exim is compiled with large file
3943 support, which makes it possible to handle log files that are bigger than
3946 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3947 instance) a domain was checked against a named list that involved a lookup,
3948 causing $domain_data to be set, then another domain was checked against the
3949 same list, then the first domain was re-checked, the value of $domain_data
3950 after the final check could be wrong. In particular, if the second check
3951 failed, it could be set empty. This bug probably also applied to
3954 41. The strip_trailing_dot option was not being applied to the address given
3955 with the -f command-line option.
3957 42. The code for reading a message's header from the spool was incrementing
3958 $received_count, but never initializing it. This meant that the value was
3959 incorrect (doubled) while delivering a message in the same process in which
3960 it was received. In the most common configuration of Exim, this never
3961 happens - a fresh exec is done - but it can happen when
3962 deliver_drop_privilege is set.
3964 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3965 it now includes up to 150 characters of the unexpected data in the log
3968 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3969 and building data strings. The size of both of these buffers was 10 000
3970 bytes - far larger than anybody would *ever* want, thought I. Needless to
3971 say, somebody hit the limit. I have increased the maximum line length to
3972 20 000 and the maximum data length of concatenated lines to 100 000. I have
3973 also fixed two bugs, because there was no checking on these buffers. Tsk,
3974 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3975 buffer is too small.
3977 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3978 lsearch lookups. Now it does.
3980 46. When parsing a route_list item in a manualroute router, a fixed-length
3981 buffer was used for the list of hosts. I made this 1024 bytes long,
3982 thinking that nobody would ever have a list of hosts that long. Wrong.
3983 Somebody had a whole pile of complicated expansion conditions, and the
3984 string was silently truncated, leading to an expansion error. It turns out
3985 that it is easier to change to an unlimited length (owing to other changes
3986 that have happened since this code was originally written) than to build
3987 structure for giving a limitation error. The length of the item that
3988 expands into the list of hosts is now unlimited.
3990 47. The lsearch lookup could not handle data where the length of text line was
3991 more than 4095 characters. Such lines were truncated, leading to shortened
3992 data being returned. It should now handle lines of any length.
3994 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3995 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3998 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3999 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4000 no longer happens in comment lines. A list of replacements is now placed
4001 at the head of all of the source files, except those whose only change is
4002 to replace PERL_COMMAND in the very first #! line.
4004 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4005 messages on the queue, with a bottom-up merge sort, using code contributed
4006 by Michael Haardt. This should make operations like -bp somewhat faster on
4007 large queues. It won't affect queue runners, except when queue_run_in_order
4010 51. Installed eximstats 1.31 in the distribution.
4012 52. Added support for SRV lookups to the dnslookup router.
4014 53. If an ACL referred to $message_body or $message_body_end, the value was not
4015 reset for any messages that followed in the same SMTP session.
4017 54. The store-handling optimization for building very long strings was not
4018 differentiating between the different store pools. I don't think this
4019 actually made any difference in practice, but I've tidied it.
4021 55. While running the routers to verify a sender address, $sender_address
4022 was still set to the sender address. This is wrong, because when routing to
4023 send a bounce to the sender, it would be empty. Therefore, I have changed
4024 it so that, while verifying a sender address, $sender_address is set to <>.
4025 (There is no change to what happens when verifying a recipient address.)
4027 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4028 target A or AAAA records (if not already returned) without resetting the
4029 qualify_single or search_parents options of the DNS resolver. These are
4030 inappropriate in this case because the targets of MX and SRV records must
4031 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4032 target that, when qualified, matched something in the local domain. These
4033 two options are now turned off when doing these lookups.
4035 57. It seems that at least some releases of Reiserfs (which does not have the
4036 concept of a fixed number of inodes) returns zero and not -1 for the
4037 number of available inodes. This interacted badly with check_spool_inodes,
4038 which assumed that -1 was the "no such thing" setting. What I have done is
4039 to check that the total number of inodes is greater than zero before doing
4040 the test of how many are available.
4042 58. When a "warn" ACL statement has a log_message modifier, the message is
4043 remembered, and not repeated. This is to avoid a lot of repetition when a
4044 message has many recipients that cause the same warning to be written.
4045 Howewer, Exim was preserving the list of already written lines for an
4046 entire SMTP session, which doesn't seem right. The memory is now reset if a
4047 new message is started.
4049 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4050 debugging output unless log_rewrite was also set.
4052 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4053 of (int)(handle) when we know that handle contains (void *)(-1).
4055 61. The Exim daemon panic-logs an error return when it closes the incoming
4056 connection. However "connection reset by peer" seems to be common, and
4057 isn't really an error worthy of noting specially, so that particular error
4060 62. When Exim is trying to find all the local interfaces, it used to panic and
4061 die if the ioctl to get the interface flags failed. However, it seems that
4062 on at least one OS (Solaris 9) it is possible to have an interface that is
4063 included in the list of interfaces, but for which you get a failure error
4064 for this call. This happens when the interface is not "plumbed" into a
4065 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4066 failure of the "get flags" call assumes that the interface is down.
4068 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4069 makes life easier for people who are doing arithmetic on fields extracted
4070 from dates, where you often get leading zeros that should not be
4071 interpreted as octal.
4073 64. Added qualify_domain to the redirect router, to override the global
4076 65. If a pathologically long header line contained very many addresses (the
4077 report of this problem mentioned 10 000) and each of them was rewritten,
4078 Exim could use up a very large amount of memory. (It kept on making new
4079 copies of the header line as it rewrote, and never released the old ones.)
4080 At the expense of a bit more processing, the header rewriting function has
4081 been changed so that it no longer eats memory in this way.
4083 66. The generation of the Received: header has been moved from the time that a
4084 message starts to be received, to the time that it finishes. The timestamp
4085 in the Received: header should now be very close to that of the <= log
4086 line. There are two side-effects of this change:
4088 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4089 logged header lines no longer include the local Received: line, because
4090 it has not yet been created. The same applies to a copy of the message
4091 that is returned to a non-SMTP sender when a message is rejected.
4093 (b) When a filter file is tested using -bf, no additional Received: header
4094 is added to the test message. After some thought, I decided that this
4097 This change does not affect the value of $received_for. It is still set
4098 after address rewriting, but before local_scan() is called.
4100 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4102 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4103 gave an unhelpful panic error message, and a defer error. I have managed to
4104 change this behaviour so that it now rejects any supplied certificate,
4105 which seems right, as the list of acceptable certificates is empty.
4107 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4108 gave an unhelpful defer error. I have not managed to make this reject any
4109 supplied certificates, but the error message it gives is "no certificate
4110 supplied", which is not helpful.
4112 70. exigrep's output now also includes lines that are not associated with any
4113 message, but which match the given pattern. Implemented by a patch from
4114 Martin Sluka, which also tidied up the Perl a bit.
4116 71. Recipient callout verification, like sender verification, was using <> in
4117 the MAIL FROM command. This isn't really the right thing, since the actual
4118 sender may affect whether the remote host accepts the recipient or not. I
4119 have changed it to use the actual sender in the callout; this means that
4120 the cache record is now keyed on a recipient/sender pair, not just the
4121 recipient address. There doesn't seem to be a real danger of callout loops,
4122 since a callout by the remote host to check the sender would use <>.
4123 [SEE ABOVE: changed after hitting problems.]
4125 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4126 temporary errors. However, in the case of such a code being given after
4127 the end of a data transmission (i.e. after ".") Exim was failing to write
4128 a retry record for the message. (Yes, there was some broken host that was
4129 actually sending 8xx at this point.)
4131 73. An unknown lookup type in a host list could cause Exim to panic-die when
4132 the list was checked. (An example that provoked this was putting <; in the
4133 middle of a list instead of at the start.) If this happened during a DATA
4134 ACL check, a -D file could be left lying around. This kind of configuration
4135 error no longer causes Exim to die; instead it causes a defer errror. The
4136 incident is still logged to the main and panic logs.
4138 74. Buglet left over from Exim 3 conversion. The message "too many messages
4139 in one connection" was written to the rejectlog but not the mainlog, except
4140 when address rewriting (yes!) was being logged.
4142 75. Added write_rejectlog option.
4144 76. When a system filter was run not as root (that is, when system_filter_user
4145 was set), the values of the $n variables were not being returned to the
4146 main process; thus, they were not subsequently available in the $sn
4149 77. Added +return_path_on_delivery log selector.
4151 78. A connection timeout was being treated differently from recipients deferred
4152 when testing hosts_max_try with a message that was older than the host's
4153 retry timeout. (The host should not be counted, thus allowing all hosts to
4154 be tried at least once before bouncing.) This may have been the cause of an
4155 occasionally reported bug whereby a message would remain on the queue
4156 longer than the retry timeout, but would be bounced if a delivery was
4157 forced. I say "may" because I never totally pinned down the problem;
4158 setting up timeout/retry tests is difficult. See also the next item.
4160 79. The ultimate address timeout was not being applied to errors that involved
4161 a combination of host plus message (for example, a timeout on a MAIL
4162 command). When an address resolved to a number of possible hosts, and they
4163 were not all tried for each delivery (e.g. because of hosts_max_try), a
4164 message could remain on the queue longer than the retry timeout.
4166 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4169 81. Fixed an obscure SMTP outgoing bug which required at least the following
4170 conditions: (a) there was another message waiting for the same server;
4171 (b) the server returned 5xx to all RCPT commands in the first message so
4172 that the message was not completed; (c) the server dropped the connection
4173 or gave a negative response to the RSET that Exim sends to abort the
4174 transaction. The observed case was a dropped connection after DATA that had
4175 been sent in pipelining mode. That is, the server had advertised PIPELINING
4176 but was not implementing it correctly. The effect of the bug was incorrect
4177 behaviour, such as trying another host, and this could lead to a crash.
4183 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4184 and daemon.c were passed as pointers to ints; they should have been
4185 pointers to socklen_t variables (which are typically unsigned ints).
4187 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4190 3. Fixed a really odd bug that affected only the testing scheme; patching a
4191 certain fixed string in the binary changed the value of another string that
4192 happened to be identical to the end of the original first string.
4194 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4195 name", it returns that address as the IP address. On some operating
4196 systems (e.g. Solaris), it also passes back the IP address string as the
4197 "host name". However, on others (e.g. Linux), it passes back an empty
4198 string. Exim wasn't checking for this, and was changing the host name to an
4199 empty string, assuming it had been canonicized.
4201 5. Although rare, it is permitted to have more than one PTR record for a given
4202 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4203 all the names associated with an address, because they do in Solaris.
4204 However, it seems that they do not in Linux for data that comes from the
4205 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4206 I found this out when I moved to a new Linux workstation and tried to run
4207 the Exim test suite.
4209 To get round this problem I have changed the code so that it now does its
4210 own call to the DNS to look up PTR records when searching for a host name.
4211 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4212 addresses that are only in /etc/hosts are still found.
4214 This behaviour is, however, controlled by an option called host_lookup_
4215 order, which defaults to "bydns:byaddr". If people want to use the other
4216 order, or indeed, just use one or the other means of lookup, they can
4217 specify it in this variable.
4219 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4220 some operating systems, this comes back from gethostbyaddr() as an empty
4221 string, and this is what Exim used to test for. However, it seems that in
4222 other systems, "." is yielded. Exim now tests for this case too.
4224 7. The values of check_spool_space and check_log_space are now held internally
4225 as a number of kilobytes instead of an absolute number of bytes. If a
4226 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4227 kilobyte. This means that much larger values can be stored.
4229 8. Exim monitor: an attempt to get the action menu when not actually pointing
4230 at a message produces an empty menu entitled "No message selected". This
4231 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4232 no entries in it ("Shell widget menu has zero width and/or height"). So I
4233 have added a single, blank menu entry in this case.
4235 9. Added ${quote_local_part.
4237 10. MIME decoding is now applied to the contents of Subject: header lines when
4240 11. Now that a reference to $sender_host_address automatically causes a reverse
4241 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4242 host lookup before query-style lookups in lists that might use this
4243 variable. This has therefore been abolished, and the "net-" prefix is no
4244 longer necessary for query-style lookups.
4246 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4247 have been a typo for LFLAGS, so it has been changed.
4249 13. The install script calls Exim with "-C /dev/null" in order to find the
4250 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4251 to be output. Howeve, since Exim outputs its version number before the
4252 error, it didn't break the script. It just looked ugly. I fixed this by
4253 always allowing "-C /dev/null" if the caller is root.
4255 14. Ignore overlarge ACL variable number when reading spool file - insurance
4256 against a later release with more variables having written the file.
4258 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4259 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4260 this, as well as the form without the "IPv6" on the front.
4262 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4263 OS/Makefile-Darwin file.
4265 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4266 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4268 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4269 variable. However, some OS use ints for inodes. I've added cast to long int
4270 to get rid of the compiler warning.
4272 19. I had forgotten to lock out "/../" in configuration file names when
4273 ALT_CONFIG_PREFIX was set.
4275 20. Routers used for verification do not need to specify transports. However,
4276 if such a router generated a host list, and callout was configured, Exim
4277 crashed, because it could not find a port number from the (non-existent)
4278 transport. It now assumes port 25 in this circumstance.
4280 21. Added the -t option to exigrep.
4282 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4283 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4284 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4285 them is set, LOOKUP_LSEARCH is forced.
4287 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4289 24. Added sender and host information to the "rejected by local_scan()" log
4290 line; previously there was no indication of these.
4292 25. Added .include_if_exists.
4294 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4295 Linux. It turns out that not all file systems support this. Apparently some
4296 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4297 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4298 not supported on the file descriptor, is now ignored when Exim is trying to
4299 sync a directory. This applies only to Linux.
4301 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4303 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4304 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4307 29. Added support for maildirsize files from supplied patch (modified a bit).
4309 30. The use of :fail: followed by an empty string could lead Exim to respond to
4310 sender verification failures with (e.g.):
4312 550 Verification failed for <xxx>
4313 550 Sender verify failed
4315 where the first response line was missing the '-' that indicates it is not
4316 the final line of the response.
4318 31. The loop for finding the name of the user that called Exim had a hardwired
4319 limit of 10; it now uses the value of finduser_retries, which is used for
4320 all other user lookups.
4322 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4325 33. Exim was neglecting to zero errno before one call of strtol() when
4326 expanding a string and expecting an integer value. On some systems this
4327 resulted in spurious "integer overflow" errors. Also, it was casting the
4328 result into an int without checking.
4330 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4331 did not work. The code looks as if it has *never* worked, though it appears
4332 to have been documented since at least releast 1.62. I have made it work.
4334 35. The "timeout_DNS" error in retry rules, also documented since at least
4335 1.62, also never worked. As it isn't clear exactly what this means, and
4336 clearly it isn't a major issue, I have abolished the feature by treating it
4337 as "timeout", and writing a warning to the main and panic logs.
4339 36. The display of retry rules for -brt wasn't always showing the error code
4342 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4343 timeout_connect_A, timeout_connect_MX.
4345 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4346 to the empty sender.
4348 39. The daemon was not analysing the content of -oX till after it had closed
4349 stderr and disconnected from the controlling terminal. This meant that any
4350 syntax errors were only noted on the panic log, and the return code from
4351 the command was 0. By re-arranging the code a little, I've made the
4352 decoding happen first, so such errors now appear on stderr, and the return
4353 code is 1. However, the actual setting up of the sockets still happens in
4354 the disconnected process, so errors there are still only recorded on the
4357 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4358 connections (as happens on some IP stacks) was logged at start up time as
4359 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4360 it from "IPv6 and IPv4", which means that two separate sockets are being
4363 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4364 says whether AF_INET or AF_INET6 was passed as an argument.
4366 42. Exiwhat output was messed up when time zones were included in log
4369 43. Exiwhat now gives more information about the daemon's listening ports,
4370 and whether -tls-on-connect was used.
4372 44. The "port" option of the smtp transport is now expanded.
4374 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4375 silently ignored. Now an error message is written to the main and panic
4378 46. There's a new ACL modifier called "logwrite" which writes to a log file
4379 as soon as it is encountered.
4381 47. Added $local_user_uid and $local_user_gid at routing time.
4383 48. Exim crashed when trying to verify a sender address that was being
4386 49. Exim was recognizing only a space character after ".include". It now also
4387 recognizes a tab character.
4389 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4390 extracting the relevant information from the specification. The man page no
4391 longer contains scrambled data for the -d option, and I've added a section
4392 at the front about calling Exim under different names.
4394 51. Added "extra_headers" argument to the "mail" command in filter files.
4396 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4399 53. Installed eximstats 1.29.
4401 54. Added transport_filter_timeout as a generic transport option.
4403 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4404 Cc: header lines. This was required by RFC 822, but it not required by RFC
4407 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4408 incoming messages that did not have them. Now it does so only if the
4409 message originates locally, that is, if there is no associated remote host
4410 address. When Resent- header lines are present, this applies to the Resent-
4411 lines rather than the non-Resent- lines.
4413 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4414 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4416 58. Messages for configuration errors now include the name of the main
4417 configuration file - useful now that there may be more than one file in a
4418 list (.included file names were always shown).
4420 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4421 for those rare installations that do not start the daemon as root or run it
4422 setuid root. I've cut out the call to initgroups() if the daemon is not
4425 60. The Exim user and group can now be bound into the binary as text strings
4426 that are looked up at the start of Exim's processing.
4428 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4430 62. Added $mailstore_basename variable.
4432 63. Installed patch to sieve.c from Michael Haardt.
4434 64. When Exim failed to open the panic log after failing to open the main log,
4435 the original message it was trying to log was written to stderr and debug
4436 output, but if they were not available (the usual case in production), it
4437 was lost. Now it is written to syslog before the two lines that record the
4438 failures to open the logs.
4440 65. Users' Exim filters run in subprocesses under the user's uid. It is
4441 possible for a "deliver" command or an alias in a "personal" command to
4442 provoke an address rewrite. If logging of address rewriting is configured,
4443 this fails because the process is not running as root or exim. There may be
4444 a better way of dealing with this, but for the moment (because 4.30 needs
4445 to be released), I have disabled address rewrite logging when running a
4446 filter in a non-root, non-exim process.
4452 1. The buildconfig auxiliary program wasn't quoting the value set for
4453 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4454 not defined. This bug was masked in 4.22 by the effect that was fixed in
4457 2. Some messages that were rejected after a message id was allocated were
4458 shown as "incomplete" by exigrep. It no longer does this for messages that
4459 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4461 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4462 have allow_domain_literals set, the ID did not get logged in the <= line.
4463 Domain literals are now always recognized in Message-ID: header lines.
4465 4. The first argument for a ${extract expansion item is the key name or field
4466 number. Leading and trailing spaces in this item were not being ignored,
4467 causing some misleading effects.
4469 5. When deliver_drop_privilege was set, single queue runner processes started
4470 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4471 same command in the process it spins off) were not dropping privilege.
4473 6. When the daemon running as "exim" started a queue runner, it always
4474 re-executed Exim in the spun-off process. This is a waste of effort when
4475 deliver_drop_privilege is set. The new process now just calls the
4476 queue-runner function directly.
4482 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4485 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4486 ignored. Though the use of -oP was forcing the writing of a pid file, it
4487 was always written to the default place.
4489 3. If the message "no IP address found for host xxxx" is generated during
4490 incoming verification, it is now followed by identification of the incoming
4491 connection (so you can more easily find what provoked it).
4493 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4495 5. Added some features to "harden" Exim a bit more against certain attacks:
4497 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4498 be put in Local/Makefile. This is like the never_users runtime option,
4499 but it cannot be overridden. The default setting is "root".
4501 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4502 prefix string with which any file named in a -C command line option
4505 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4506 is retained for -C and -D only if the caller of Exim is root. Without
4507 it, the exim user may also use -C and -D and retain privilege.
4509 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4510 command line option is disabled.
4512 6. Macro names set by the -D option must start with an upper case letter, just
4513 like macro names defined in the configuration file.
4515 7. Added "dereference=" facility to LDAP.
4517 8. Two instances of the typo "uknown" in the source files are fixed.
4519 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4520 the Configure-Makefile script screwed up while processing it.
4522 10. Incorporated PCRE 4.4.
4524 11. The SMTP synchronization check was not operating right at the start of an
4525 SMTP session. For example, it could not catch a HELO sent before the client
4526 waited for the greeting. There is now a check for outstanding input at the
4527 point when the greeting is written. Because of the duplex, asynchronous
4528 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4529 way, but not yet received, when the check is performed.
4531 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4532 on TCP/IP sockets, because this apparently causes some broken clients to
4535 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4536 unchanged) from the Cygwin maintainer.
4538 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4539 was supported instead of testing for mbx. Effectively a typo.
4541 15. The spa authenticator server code was not checking that the input it
4542 received was valid base64.
4544 16. The debug output line for the "set" modifier in ACLs was not showing the
4545 name of the variable that was being set.
4547 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4549 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4550 lookup on its own. Something else was needed to trigger the lookup. For
4551 example, a match in host_lookup or the need for a host name in a host list.
4552 Now, if $sender_host_name is referenced and the host name has not yet been
4553 looked up, a lookup is performed. If the lookup fails, the variable remains
4554 empty, and $host_lookup_failed is set to "1".
4556 19. Added "eqi" as a case-independent comparison operator.
4558 20. The saslauthd authentication condition could segfault if neither service
4559 nor realm was specified.
4561 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4562 error message that was logged was misleading, and incoming SMTP
4563 connections were dropped. The message is now more accurate, and temporary
4564 errors are given to SMTP connections.
4566 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4567 (except RSET) with a 421 error, until QUIT is received. However, it was
4568 failing to send a response to QUIT.
4570 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4571 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4572 ACL is now run after the helo_try_verify_hosts code.
4574 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4575 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4576 case-independent, so other case variants are also recognized). Apparently
4577 some systems use these upper case variants.
4579 25. If more than two messages were waiting for the same host, and a transport
4580 filter was specified for the transport, Exim sent two messages over the
4581 same TCP/IP connection, and then failed with "socket operation on non-
4582 socket" when it tried to send the third.
4584 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4586 27. The extern definition of crypt16() in expand.c was not being excluded when
4587 the OS had its own crypt16() function.
4589 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4590 as a preferred synonym for return_size_limit, both as an option and as an
4593 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4595 30. Changed the default configuration ACL to relax the local part checking rule
4596 for addresses that are not in any local domains. For these addresses,
4597 slashes and pipe symbols are allowed within local parts, but the sequence
4598 /../ is explicitly forbidden.
4600 31. SPA server authentication was not clearing the challenge buffer before
4603 32. log_message in a "warn" ACL statement was writing to the reject log as
4604 well as to the main log, which contradicts the documentation and doesn't
4605 seem right (because no rejection is happening). So I have stopped it.
4607 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4608 However, I am unable to do any testing of this.
4610 34. Fixed an infelicity in the appendfile transport. When checking directories
4611 for a mailbox, to see if any needed to be created, it was accidentally
4612 using path names with one or more superfluous leading slashes; tracing
4613 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4615 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4616 contents are added to the log line that is written for every discarded
4617 recipient. (Previously a log_message setting was ignored.)
4619 36. The ${quote: operator now quotes the string if it is empty.
4621 37. The install script runs exim in order to find its version number. If for
4622 some reason other than non-existence or emptiness, which it checks, it
4623 could not run './exim', it was installing it with an empty version number,
4624 i.e. as "exim-". This error state is now caught, and the installation is
4627 38. An argument was missing from the function that creates an error message
4628 when Exim fails to connect to the socket for saslauthd authentication.
4629 This could cause Exim to crash, or give a corrupted message.
4631 39. Added isip, isip4, and isip6 to ${if conditions.
4633 40. The ACL variables $acl_xx are now saved with the message, and can be
4634 accessed later in routers, transports, and filters.
4636 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4637 strings in the file are not string-expanded.
4639 42. If a MAIL command specified a SIZE value that was too large to fit into an
4640 int variable, the check against message_size_limit failed. Such values are
4641 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4642 day this will have to be increased, but I don't think I want to be around
4643 when emails are that large.
4650 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4651 iconv() is not standard in FreeBSD.
4653 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4654 IPv6 enabled. The observed symptom was a segmentation fault on return from
4655 the function os_common_find_running_interfaces() in src/os.c.
4657 3. In the check_special_case() function in daemon.c I had used "errno" as an
4658 argument name, which causes warnings on some systems. This was basically a
4659 typo, since it was named "eno" in the comments!
4661 4. The code that waits for the clock to tick (at a resolution of some fraction
4662 of a second) so as to ensure message-id uniqueness was always waiting for
4663 at least one whole tick, when it could have waited for less. [This is
4664 almost certainly not relevant at current processor speeds, where it is
4665 unlikely to ever wait at all. But we try to future-proof.]
4667 5. The function that sleeps for a time interval that includes fractions of a
4668 second contained a race. It did not block SIGALRM between setting the
4669 timer, and suspending (a couple of lines later). If the interval was short
4670 and the sigsuspend() was delayed until after it had expired, the suspension
4671 never ended. On busy systems this could lead to processes getting stuck for
4674 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4675 process, before it forks any delivery processes. The open lookup caching
4676 mechanism meant that the open file or database connection was passed into
4677 the delivery process. The problem was that delivery processes always tidy
4678 up cached lookup data. This could cause a problem for the next delivery
4679 process started by the queue runner, because the external queue runner
4680 process does not know about the closure. So the next delivery process
4681 still has data in the lookup cache. In the case of a file lookup, there was
4682 no problem because closing a file descriptor in a subprocess doesn't affect
4683 the parent. However, if the lookup was caching a connection to a database,
4684 the connection was closed, and the second delivery process was likely to
4685 see errors such as "PGSQL: query failed: server closed the connection
4686 unexpectedly". The problem has been fixed by closing all cached lookups
4687 in a queue runner before running a delivery process.
4689 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4690 seem to have the "const" qualifier which it has on other OS. I've
4693 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4694 *of the same type* (client or server) with the same public name that an
4695 error should be diagnosed.
4697 9. When Exim looked up a host name for an IP address, but failed to find the
4698 original IP address when looking up the host name (a safety check), it
4699 output the message "<ip address> does not match any IP for NULL", which was
4700 confusing, to say the least. The bug was that the host name should have
4701 appeared instead of "NULL".
4703 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4704 user that is built into the binary, and the -C or -D options is used, root
4705 privilege is dropped before the configuration file is read. In addition,
4706 logging is switched to stderr instead of the normal log files. If the
4707 configuration then re-defines the Exim user, the unprivileged environment
4708 is probably not what is expected, so Exim logs a panic warning message (but
4711 However, if deliver_drop_privilege is set, the unprivileged state may well
4712 be exactly what is intended, so the warning has been cut out in that case,
4713 and Exim is allowed to try to write to its normal log files.
4719 1. smtp_return_error_details was not giving details for temporary sender
4720 or receiver verification errors.
4722 2. Diagnose a configuration error if two authenticators have the same public
4725 3. Exim used not to create the message log file for a message until the first
4726 delivery attempt. This could be confusing when incoming messages were held
4727 for policy or load reasons. The message log file is now created at the time
4728 the message is received, and an initial "Received" line is written to it.
4730 4. The automatically generated man page for command line options had a minor
4731 bug that caused no ill effects; however, a more serious problem was that
4732 the procedure for building the man page automatically didn't always
4733 operate. Consequently, release 4.20 contains an out-of-date version. This
4734 shouldn't happen again.
4736 5. When building Exim with embedded Perl support, the script that builds the
4737 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4738 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4740 6. The freeze_tell option was not being used for messages that were frozen on
4741 arrival, either by an ACL or by local_scan().
4743 7. Added the smtp_incomplete_transaction log selector.
4745 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4746 was accepting AUTH without a new EHLO.
4748 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4749 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4752 10. Logging of TCP/IP connections (when configured) now happens in the main
4753 daemon process instead of the child process, so that the TCP/IP connection
4754 count is more accurate (but it can never be perfect).
4756 11. The use of "drop" in a nested ACL was not being handled correctly in the
4757 outer ACL. Now, if condition failure induced by the nested "drop" causes
4758 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4759 or "require"), the connection is dropped.
4761 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4762 that yield "discard" can now be used with an "accept" or a "discard" verb,
4763 but an error is generated for any others (because I can't see a useful way
4764 to define what should happen).
4766 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4767 are now processed in the same way as lines in the Exim configuration file.
4768 In particular, continuation lines are supported.
4770 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4772 15. Added -ti meaning -t -i.
4774 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4775 domains, and warn by logging if others are found.
4777 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4778 returned from GIFCONF when Exim is trying to find the list of interfaces on
4779 a host. The code in os.c has been modified to copy each ifreq to an aligned
4780 structure in all cases.
4782 Also, in some cases, the returned ifreq's were being copied to a 'struct
4783 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4784 means the last couple of bytes of an IPv6 address could be chopped if the
4785 ifreq contained only a normal sockaddr (14 bytes storage).
4787 18. Named domain lists were not supported in the hosts_treat_as_local option.
4788 An entry such as +xxxx was not recognized, and was treated as a literal
4791 19. Ensure that header lines added by a DATA ACL are included in the reject log
4792 if the ACL subsequently rejects the message.
4794 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4795 MD5 (which is deprecated).
4797 21. When testing a filter file using -bf, Exim was writing a message when it
4798 took the sender from a "From " line in the message, but it was not doing so
4799 when it took $return_path from a Return-Path: header line. It now does.
4801 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4802 with a valid header line field name (a series of printing characters
4803 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4805 23. Changed "disc" in the source to "disk" to conform to the documentation and
4806 the book and for uniformity.
4808 24. Ignore Sendmail's -Ooption=value command line item.
4810 25. When execve() failed while trying to run a command in a pipe transport,
4811 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4812 could be confused with a return value of 69 from the command itself. This
4813 has been changed to 127, the value the shell returns if it is asked to run
4814 a non-existent command. The wording for the related log line suggests a
4815 non-existent command as the problem.
4817 26. If received_header_text expands to an empty string, do not add a Received:
4818 header line to the message. (Well, it adds a token one on the spool, but
4819 marks it "old" so that it doesn't get used or transmitted.)
4821 27. Installed eximstats 1.28 (addition of -nt option).
4823 28. There was no check for failure on the call to getsockname() in the daemon
4824 code. This can fail if there is a shortage of resources on the system, with
4825 ENOMEM, for example. A temporary error is now given on failure.
4827 29. Contrary to the C standard, it seems that in some environments, the
4828 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4829 program. Exim now does this explicitly; it affects the formatting of
4830 timestamps using strftime().
4832 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4833 complaints. I've now initialized all the variables, to avoid this.
4835 32. Header lines added by a system filter were not being "seen" during
4836 transport-time rewrites.
4838 33. The info_callback() function passed to OpenSSL is set up with type void
4839 (*)(SSL *, int, int), as described somewhere. However, when calling the
4840 function (actually a macro) that sets it up, the type void(*)() is
4841 expected. I've put in a cast to prevent warnings from picky compilers.
4843 34. If a DNS black list lookup found a CNAME record, but there were no A
4844 records associated with the domain it pointed at, Exim crashed.
4846 35. If a DNS black list lookup returned more than one A record, Exim ignored
4847 all but the first. It now scans all returned addresses if a particular IP
4848 value is being sought. In this situation, the contents of the
4849 $dnslist_value variable are a list of all the addresses, separated by a
4852 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4853 to accept a host name and all its aliases if the forward lookup for any of
4854 them yielded the IP address of the incoming connection. Now it accepts only
4855 those names whose forward lookup yields the correct IP address. Any other
4856 names are discarded. This closes a loophole whereby a rogue DNS
4857 administrator could create reverse DNS records to break through a
4858 wildcarded host restriction in an ACL.
4860 37. If a user filter or a system filter that ran in a subprocess used any of
4861 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4862 the wrong values were passed to the pipe command ($thisaddress had the
4863 value of $0, $0 had the value of $1, etc). This bug was introduced by
4864 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4866 38. Improved the line breaking for long SMTP error messages from ACLs.
4867 Previously, if there was no break point between 40 and 75 characters, Exim
4868 left the rest of the message alone. Two changes have been made: (a) I've
4869 reduced the minimum length to 35 characters; (b) if it can't find a break
4870 point between 35 and 75 characters, it looks ahead and uses the first one
4871 that it finds. This may give the occasional overlong line, but at least the
4872 remaining text gets split now.
4874 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4875 file descriptors might be low, and that setting 1000 would always raise it.
4876 It turns out that in some environments, the limit is already over 1000 and
4877 that lowering it causes trouble. So now Exim takes care not to decrease it.
4879 40. When delivering a message, the value of $return_path is set to $sender_
4880 address at the start of routing (routers may change the value). By an
4881 oversight, this default was not being set up when an address was tested by
4882 -bt or -bv, which affected the outcome if any router or filter referred to
4885 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4886 log only when "message" or "log_message" are set. However, if one of the
4887 conditions was an address verification, or a call to a nested ACL, the
4888 messages generated by the underlying test were being passed through. This
4889 no longer happens. The underlying message is available in $acl_verify_
4890 message for both "message" and "log_message" expansions, so it can be
4891 passed through if needed.
4893 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4894 new expansion $bh_ to give the encoded byte string without charset
4895 translation. Translation happens only if iconv() is available; HAVE_ICONV
4896 indicates this at build time. HEADERS_CHARSET gives the charset to
4897 translate to; headers_charset can change it in the configuration, and
4898 "headers charset" can change it in an individual filter file.
4900 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4901 that creates RFC 2047 encoded "words" labels them as that charset instead
4902 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4903 expansion operator; (ii) when Exim creates a From: line for a local
4904 message; (iii) when a header line is rewritten to include a "phrase" part.
4906 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4907 buggy, causing it to skip the first lines of messages whose message ID
4908 ended in 'D'. This would not have bitten before Exim release 4.14, because
4909 message IDs were unlikely to end in 'D' before then. The effect was to have
4910 incorrect size information for certain domains.
4912 45. #include "config.h" was missing at the start of the crypt16.c module. This
4913 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4916 46. If there was a timeout during a "random" callout check, Exim treated it as
4917 a failure of the random address, and carried on sending RSET and the real
4918 address. If the delay was just some slowness somewhere, the response to the
4919 original RCPT would be taken as a response to RSET and so on, causing
4920 mayhem of various kinds.
4922 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4923 when I implemented it. It didn't allow for the fact that some option values
4924 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4925 the right test for positive values.
4927 48. Domain names in DNS records are case-independent. Exim always looks them up
4928 in lower case. Some resolvers return domain names in exactly the case they
4929 appear in the zone file, that is, they may contain uppercase letters. Not
4930 all resolvers do this - some return always lower case. Exim was treating a
4931 change of case by a resolver as a change of domain, similar to a widening
4932 of a domain abbreviation. This triggered its re-routing code and so it was
4933 trying to route what was effectively the same domain again. This normally
4934 caused routing to fail (because the router wouldn't handle the domain
4935 twice). Now Exim checks for this case specially, and just changes the
4936 casing of the domain that it ultimately uses when it transmits the message
4939 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4942 50. If a filter generated a file delivery with a non-absolute name (possible if
4943 no home directory exists for the router), the forbid_file option was not
4946 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4947 the existing equality matching.
4949 52. Exim was using ints instead of ino_t variables in some places where it was
4950 dealing with inode numbers.
4952 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4953 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4954 called TMPDIR, and if it finds it is different, it changes its value.
4956 54. The smtp_printf() function is now made available to local_scan() so
4957 additional output lines can be written before returning. There is also an
4958 smtp_fflush() function to enable the detection of a dropped connection.
4959 The variables smtp_input and smtp_batched_input are exported to
4962 55. Changed the default runtime configuration: the message "Unknown user"
4963 has been removed from the ACL, and instead placed on the localuser router,
4964 using the cannot_route_message feature. This means that any verification
4965 failures that generate their own messages won't get overridden. Similarly,
4966 the "Unrouteable address" message that was in the ACL for unverifiable
4967 relay addresses has also been removed.
4969 56. Added hosts_avoid_esmtp to the smtp transport.
4971 57. The exicyclog script was not checking for the esoteric option
4972 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4973 will work only if exicyclog is run under the appropriate euid.
4975 58. Following a discussion on the list, the rules by which Exim recognises line
4976 endings on incoming messages have been changed. The -dropcr and drop_cr
4977 options are now no-ops, retained only for backwards compatibility. The
4978 following line terminators are recognized: LF CRLF CR. However, special
4979 processing applies to CR:
4981 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4982 nor a local message in the state where . is a terminator.
4984 (ii) If a bare CR is encountered in a header line, an extra space is added
4985 after the line terminator so as not to end the header. The reasoning
4986 behind this is that bare CRs in header lines are most likely either
4987 to be mistakes, or people trying to play silly games.
4989 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4990 was being incorrectly given as 18 bytes larger than it should have been.
4991 This is a VOB (very old bug).
4993 60. This may never have affected anything current, but just in case it has:
4994 When the local host is found other than at the start of a list of hosts,
4995 the local host, those with the same MX, and any that follow, are discarded.
4996 When the list in question was part of a longer list of hosts, the following
4997 hosts (not currently being processed) were also being discarded. This no
4998 longer happens. I'm not sure if this situation could ever has previously
5001 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5004 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5005 header. This is something that is recommended in a new Internet Draft, and
5006 is something that is documented as being done by Sendmail. There are two
5007 possible values. For messages generated by the autoreply transport, Exim
5010 Auto-Submitted: auto-replied
5012 whereas for all other generated messages (e.g. bounces) it adds
5014 Auto-Submitted: auto-generated
5016 63. The "personal" condition in filters now includes a test for the
5017 Auto-Submitted: header. If it contains the string "auto-" the message it
5018 not considered personal.
5020 64. Added rcpt_include_affixes as a generic transport option.
5022 65. Added queue_only_override (default true).
5024 66. Added the syslog_duplication option.
5026 67. If what should have been the first header line of a message consisted of
5027 a space followed by a colon, Exim was mis-interpreting it as a header line.
5028 It isn't of course - it is syntactically invalid and should therefore be
5029 treated as the start of the message body. The misbehaviour could have
5030 caused a number of strange effects, including loss of data in subsequent
5031 header lines, and spool format errors.
5033 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5034 client host had authenticated. This control can now be exercised by an ACL
5035 for more flexibility.
5037 69. By default, callouts do not happen when testing with -bh. There is now a
5038 variant, -bhc, which does actually run the callout code, including
5039 consulting and updating the callout cache.
5041 70. Added support for saslauthd authentication, courtesy of Alexander
5044 71. If statvfs() failed on the spool or log directories while checking their
5045 size for availability, Exim confusingly gave the error "space shortage".
5046 Furthermore, in debugging mode it crashed with a floating point exception.
5047 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5048 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5049 serious problem, Exim now writes to the main and panic logs when this
5050 happens, with details of the failure. It then refuses to accept the
5051 incoming message, giving the message "spool directory problem" or "log
5052 directory problem" with a 421 code for SMTP messages.
5054 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5055 0, 1, and 2 exist, because some OS complain for execs without them (see
5056 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5057 descriptors. However, the code omitted to check that the open succeeded,
5058 causing mysterious errors if for some reason the permissions on /dev/null
5059 got screwed. Now Exim writes a message to the main and panic logs, and
5060 bombs out if it can't open /dev/null.
5062 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5063 interact so that it is all more flexible. It is supposed to remain
5064 backwards compatible. Also added extra_local_interfaces.
5066 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5067 to bomb out with an assertion failure - to the client this appears as a
5068 connection drop. This problem occurs in the part of the code that was taken
5069 from the Samba project. Fortunately, the assertion is in a very simple
5070 function, so I have fixed this by reproducing the function inline in the
5071 one place where it is called, and arranging for authentication to fail
5072 instead of killing the process with assert().
5074 75. The SPA client code was not working when the server requested OEM rather
5075 than Unicode encoding.
5077 76. Added code to make require_files with a specific uid setting more usable in
5078 the case where statting the file as root fails - usually a non-root-mounted
5079 NFS file system. When this happens and the failure is EACCES, Exim now
5080 forks a subprocess and does the per-uid checking as the relevant uid.
5082 77. Added process_log_path.
5084 78. If log_file_path was not explicitly set, a setting of check_log_space or
5085 check_log_inodes was ignored.
5087 79. If a space check for the spool or log partitions fails, the incident is now
5088 logged. Of course, in the latter case the data may get lost...
5090 80. Added the %p formatting code to string_format() so that it can be used to
5091 print addresses in debug_print(). Adjusted all the address printing in the
5092 debugging in store.c to use %p rather than %d.
5094 81. There was a concern that a line of code in smtp_in.c could overflow a
5095 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5096 initially expressed, the concern was not well-founded, because trailing
5097 spaces are removed early. However, if the trailing spaces were followed by
5098 a NULL, they did not get removed, so the overflow was possible. Two fixes
5101 (a) I re-wrote the offending code in a cleaner fashion.
5102 (b) If an incoming SMTP command contains a NULL character, it is rejected
5105 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5106 runs initgroups(), so that if the Exim user is in any additional groups,
5107 they will be used during message reception.
5113 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob