1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.614 2010/06/03 05:43:24 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.
15 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
17 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
19 NM/01 Bugzilla 965: Support mysql stored procedures.
20 Patch from Alain Williams
22 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
24 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
25 Patch from Andreas Metzler
27 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
28 Patch from Kirill Miazine
30 NM/05 Bugzilla 671: Added umask to procmail example.
32 JJ/03 installed exipick 20100323.0, fixing doc bug
34 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
35 directory. Notification and patch from Dan Rosenberg.
37 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
39 TK/02 Improve log output when DKIM signing operation fails.
41 MH/01 Treat the transport option dkim_domain as a colon separated
42 list, not as a single string, and sign the message with each element,
43 omitting multiple occurences of the same signer.
45 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
46 Bugzilla 985, 986. Patch by Simon Arlott
48 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
51 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
52 MBX locking. Notification from Dan Rosenberg.
58 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
60 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
62 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
64 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
66 NM/04 Bugzilla 915: Flag broken perl installation during build.
72 TK/01 Added patch by Johannes Berg that expands the main option
73 "spamd_address" if it starts with a dollar sign.
75 TK/02 Write list of recipients to X-Envelope-Sender header when building
76 the mbox-format spool file for content scanning (suggested by Jakob
79 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
80 (http://www.dcc-servers.net/) support via dccifd. Activated by
81 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
83 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
84 by Mark Daniel Reidel <mr@df.eu>.
86 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
87 When building exim an external PCRE library is now needed -
88 PCRE is a system library on the majority of modern systems.
89 See entry on PCRE_LIBS in EDITME file.
91 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
92 conversation. Added nologin parameter to request.
93 Patch contributed by Kirill Miazine
95 TF/01 Do not log submission mode rewrites if they do not change the address.
97 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
99 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
100 log files in place. Contributed by Roberto Lima
102 NM/04 Bugzilla 667: close socket used by dovecot authenticator
104 TF/03 Bugzilla 615: When checking the local_parts router precondition
105 after a local_part_suffix or local_part_prefix option, Exim now
106 does not use the address's named list lookup cache, since this
107 contains cached lookups for the whole local part.
109 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
110 Robert Millan. Documentation is in experimental-spec.txt
112 TF/04 Bugzilla 668: Fix parallel build (make -j).
114 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
116 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
117 Patch provided by Jan Srzednicki
119 TF/05 Leading white space used to be stripped from $spam_report which
120 wrecked the formatting. Now it is preserved.
122 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
123 that they are available at delivery time.
125 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
127 TF/08 TLS error reporting now respects the incoming_interface and
128 incoming_port log selectors.
130 TF/09 Produce a more useful error message if an SMTP transport's hosts
131 setting expands to an empty string.
133 NM/06 Bugzilla 744: EXPN did not work under TLS.
134 Patch provided by Phil Pennock
136 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
137 Patch provided by Richard Godbee
139 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
140 acl_smtp_notquit, added index entry.
142 NM/09 Bugzilla 787: Potential buffer overflow in string_format
143 Patch provided by Eugene Bujak
145 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
146 Patch provided by Maxim Dounin
148 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
149 Patch provided by Phil Pennock
151 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
153 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
154 Patch provided by Brad "anomie" Jorsch
156 NM/14 Bugzilla 622: Added timeout setting to transport filter.
157 Patch provided by Dean Brooks
159 TK/05 Add native DKIM support (does not depend on external libraries).
161 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
162 Patch provided by Graeme Fowler
164 NM/16 Bugzilla 851: Documentation example syntax fix.
166 NM/17 Changed NOTICE file to remove references to embedded PCRE.
168 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
170 NM/19 Bugzilla 745: TLS version reporting
171 Patch provided by Phil Pennock
173 NM/20 Bugzilla 167: bool: condition support
174 Patch provided by Phil Pennock
176 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
177 Patch provided by Phil Pennock
179 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
180 Patch provided by Brad "anomie" Jorsch
182 NM/23 Bugzilla 687: Fix misparses in eximstats
183 Patch provided by Heiko Schlittermann
185 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
186 Patch provided by Heiko Schlittermann
188 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
189 plus update to original patch.
191 NM/26 Bugzilla 799: Documentation correction for ratelimit
193 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
194 Patch provided by David Brownlee
196 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
198 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
200 NM/30 Bugzilla 888: TLS documentation bugfixes
202 NM/31 Bugzilla 896: Dovecot buffer overrun fix
204 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
205 Unlike the original bugzilla I have changed all shell scripts in src tree
207 NM/33 Bugzilla 898: Transport filter timeout fix
208 Patch by Todd Rinaldo
210 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
211 Patch by Serge Demonchaux
213 NM/35 Bugzilla 39: Base64 decode bug fixes
214 Patch by Jakob Hirsch
216 NM/36 Bugzilla 909: Correct connect() call in dcc code
218 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
220 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
222 NM/39 Bugzilla 911: Fixed MakeLinks build script
228 TK/01 Add preliminary DKIM support. Currently requires a forked version of
229 ALT-N's libdkim that I have put here:
230 http://duncanthrax.net/exim-experimental/
232 Note to Michael Haardt: I had to rename some vars in sieve.c. They
233 were called 'true' and it seems that C99 defines that as a reserved
234 keyword to be used with 'bool' variable types. That means you could
235 not include C99-style headers which use bools without triggering
236 build errors in sieve.c.
238 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
239 as mailq or other aliases. Changed the --help handling significantly
240 to do whats expected. exim_usage() emits usage/help information.
242 SC/01 Added the -bylocaldomain option to eximstats.
244 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
246 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
248 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
254 PH/01 Another patch from the Sieve maintainer.
256 PH/02 When an IPv6 address is converted to a string for single-key lookup
257 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
258 dots are used instead of colons so that keys in lsearch files need not
259 contain colons. This was done some time before quoting was made available
260 in lsearch files. However, iplsearch files do require colons in IPv6 keys
261 (notated using the quote facility) so as to distinguish them from IPv4
262 keys. This meant that lookups for IP addresses in host lists did not work
263 for iplsearch lookups.
265 This has been fixed by arranging for IPv6 addresses to be expressed with
266 colons if the lookup type is iplsearch. This is not incompatible, because
267 previously such lookups could never work.
269 The situation is now rather anomolous, since one *can* have colons in
270 ordinary lsearch keys. However, making the change in all cases is
271 incompatible and would probably break a number of configurations.
273 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
276 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
277 conversion specification without a maximum field width, thereby enabling
278 a rogue spamd server to cause a buffer overflow. While nobody in their
279 right mind would setup Exim to query an untrusted spamd server, an
280 attacker that gains access to a server running spamd could potentially
281 exploit this vulnerability to run arbitrary code as the Exim user.
283 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
284 $primary_hostname instead of what libspf2 thinks the hosts name is.
286 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
287 a directory entry by the name of the lookup key. Previously, if a
288 symlink pointed to a non-existing file or a file in a directory that
289 Exim lacked permissions to read, a lookup for a key matching that
290 symlink would fail. Now it is enough that a matching directory entry
291 exists, symlink or not. (Bugzilla 503.)
293 PH/03 The body_linecount and body_zerocount variables are now exported in the
296 PH/04 Added the $dnslist_matched variable.
298 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
299 This means they are set thereafter only if the connection becomes
302 PH/06 Added the client_condition to authenticators so that some can be skipped
303 by clients under certain conditions.
305 PH/07 The error message for a badly-placed control=no_multiline_responses left
306 "_responses" off the end of the name.
308 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
310 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
311 (without spaces) instead of just copying the configuration text.
313 PH/10 Added the /noupdate option to the ratelimit ACL condition.
315 PH/11 Added $max_received_linelength.
317 PH/12 Added +ignore_defer and +include_defer to host lists.
319 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
320 way in which PCRE > 7.0 is built.
322 PH/14 Implemented queue_only_load_latch.
324 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
325 MAIL command. The effect was to mangle the value on 64-bit systems.
327 PH/16 Another patch from the Sieve maintainer.
329 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
331 PH/18 If a system quota error occurred while trying to create the file for
332 a maildir delivery, the message "Mailbox is full" was not appended to the
333 bounce if the delivery eventually timed out. Change 4.67/27 below applied
334 only to a quota excession during the actual writing of the file.
336 PH/19 It seems that peer DN values may contain newlines (and other non-printing
337 characters?) which causes problems in log lines. The DN values are now
338 passed through string_printing() before being added to log lines.
340 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
341 and InterBase are left for another time.)
343 PH/21 Added message_body_newlines option.
345 PH/22 Guard against possible overflow in moan_check_errorcopy().
347 PH/23 POSIX allows open() to be a macro; guard against that.
349 PH/24 If the recipient of an error message contained an @ in the local part
350 (suitably quoted, of course), incorrect values were put in $domain and
351 $local_part during the evaluation of errors_copy.
357 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
358 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
361 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
362 issue a MAIL command.
364 PH/02 In an ACL statement such as
366 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
368 if a client was not listed at all, or was listed with a value other than
369 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
370 the condition was not true (as it should be), so access was not denied.
371 The bug was that the ! inversion was incorrectly passed on to the second
372 item. This has been fixed.
374 PH/03 Added additional dnslists conditions == and =& which are different from
375 = and & when the dns lookup returns more than one IP address.
377 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
378 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
380 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
381 FSYNC, which compiles an option called disable_fsync that allows for
382 bypassing fsync(). The documentation is heavily laced with warnings.
384 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
386 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
387 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
388 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
389 including adding "make clean"; (3) Added -fPIC when compiling the test
390 dynamically loaded module, to get rid of a warning.
392 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
393 message fails, move_frozen_messages = true and ignore_bounce_errors_after
394 = 0s. The bug is otherwise harmless.
396 PH/07 There was a bug in the dovecot authenticator such that the value of
397 $auth1 could be overwritten, and so not correctly preserved, after a
398 successful authentication. This usually meant that the value preserved by
399 the server_setid option was incorrect.
401 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
403 PH/09 Installed PCRE release 7.0.
405 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
406 run for batched SMTP input. It is now run at the start of every message
407 in the batch. While fixing this I discovered that the process information
408 (output by running exiwhat) was not always getting set for -bs and -bS
409 input. This is fixed, and it now also says "batched" for BSMTP.
411 PH/11 Added control=no_pipelining.
413 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
414 patch, slightly modified), and move the expansion of helo_data till after
415 the connection is made in the smtp transport (so it can use these
418 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
420 PH/14 Added log_selector = +pid.
422 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
424 PH/16 Add ${if forany and ${if forall.
426 PH/17 Added dsn_from option to vary the From: line in DSNs.
428 PH/18 Flush SMTP output before performing a callout, unless control =
429 no_callout_flush is set.
431 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
432 was true (the default) a successful delivery failed to delete the retry
433 item, thus causing premature timeout of the address. The bug is now
436 PH/20 Added hosts_avoid_pipelining to the smtp transport.
438 PH/21 Long custom messages for fakedefer and fakereject are now split up
439 into multiline reponses in the same way that messages for "deny" and
440 other ACL rejections are.
442 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
443 with slight modification.
445 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
446 draft, changing the syntax and factoring some duplicate code".
448 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
449 for deliveries of the second and subsequent messages over the same SMTP
452 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
453 ${reduce, with only minor "tidies".
455 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
457 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
458 expansion side effects.
460 PH/27 When a message times out after an over-quota error from an Exim-imposed
461 quota, the bounce message says "mailbox is full". This message was not
462 being given when it was a system quota that was exceeded. It now should
465 MH/03 Made $recipients available in local_scan(). local_scan() already has
466 better access to the recipient list through recipients_list[], but
467 $recipients can be useful in postmaster-provided expansion strings.
469 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
470 in the case of a MAIL command with additional options following the
471 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
472 were accidentally chopped off.
474 PH/29 SMTP synchronization checks are implemented when a command is read -
475 there is a check that no more input is waiting when there shouldn't be
476 any. However, for some commands, a delay in an ACL can mean that it is
477 some time before the response is written. In this time, more input might
478 arrive, invalidly. So now there are extra checks after an ACL has run for
479 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
480 pipelining has not been advertised.
482 PH/30 MH's patch to allow iscntrl() characters to be list separators.
484 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
485 returned in the SMTP response when smtp_return_error_details was false.
488 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
489 instead of the C I/O that was originally supplied, because problems were
492 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
493 Exim which did not show up earlier: it was assuming that a call to
494 SSL_CTX_set_info_callback() might give an error value. In fact, there is
495 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
496 was a macro that became an assignment, so it seemed to work. This has
497 changed to a proper function call with a void return, hence the compile
498 error. Exim's code has been fixed.
500 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
503 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
505 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
507 PH/37 If a message is not accepted after it has had an id assigned (e.g.
508 because it turns out to be too big or there is a timeout) there is no
509 "Completed" line in the log. When some messages of this type were
510 selected by exigrep, they were listed as "not completed". Others were
511 picked up by some special patterns. I have improved the selection
512 criteria to be more general.
514 PH/38 The host_find_failed option in the manualroute router can now be set
515 to "ignore", to completely ignore a host whose IP address cannot be
516 found. If all hosts are ignored, the behaviour is controlled by the new
517 host_all_ignored option.
519 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
520 homing or because of multiple MX records with /mx) generated more than
521 one IP address, and the following item turned out to be the local host,
522 all the secondary addresses of the first item were incorrectly removed
523 from the list, along with the local host and any following hosts (which
524 is what is supposed to happen).
526 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
527 whoever called Exim into the -H file. In the case of the daemon it was
528 behaving confusingly. When first started, it used values for whoever
529 started the daemon, but after a SIGHUP it used the Exim user (because it
530 calls itself on a restart). I have changed the code so that it now always
533 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
534 message are rejected with the same error (e.g. no authentication or bad
535 sender address), and a DATA command is nevertheless sent (as can happen
536 with PIPELINING or a stupid MUA), the error message that was given to the
537 RCPT commands is included in the rejection of the DATA command. This is
538 intended to be helpful for MUAs that show only the final error to their
541 PH/42 Another patch from the Sieve maintainer.
543 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
544 Eximstats - Fixed some broken HTML links and added missing column headers
546 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
547 columns for Rejects, Temp Rejects, Ham, and Spam rows.
549 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
551 PH/43 Yet another patch from the Sieve maintainer.
553 PH/44 I found a way to check for a TCP/IP connection going away before sending
554 the response to the final '.' that terminates a message, but only in the
555 case where the client has not sent further data following the '.'
556 (unfortunately, this is allowed). However, in many cases there won't be
557 any further data because there won't be any more messages to send. A call
558 to select() can be used: if it shows that the input is "ready", there is
559 either input waiting, or the socket has been closed. An attempt to read
560 the next input character can distinguish the two cases. Previously, Exim
561 would have sent an OK response which the client would never have see.
562 This could lead to message repetition. This fix should cure that, at
563 least in a lot of common cases.
565 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
566 advertised in response to EHLO.
572 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
573 fixed by 4.65/MH/01 (is this a record?) are fixed:
575 (i) An empty string was always treated as zero by the numeric comparison
576 operators. This behaviour has been restored.
578 (ii) It is documented that the numeric comparison operators always treat
579 their arguments as decimal numbers. This was broken in that numbers
580 starting with 0 were being interpreted as octal.
582 While fixing these problems I realized that there was another issue that
583 hadn't been noticed. Values of message_size_limit (both the global option
584 and the transport option) were treated as octal if they started with 0.
585 The documentation was vague. These values are now always treated as
586 decimal, and I will make that clear in the documentation.
592 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
593 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
596 MH/01 Don't check that the operands of numeric comparison operators are
597 integers when their expansion is in "skipping" mode (fixes bug
598 introduced by 4.64-PH/07).
600 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
601 child addresses, Exim now panics and dies. Previously, because the count
602 is held in a short int, deliveries were likely to be lost. As such a
603 large number of recipients for a single message is ridiculous
604 (performance will be very, very poor), I have chosen to impose a limit
605 rather than extend the field.
611 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
612 leftover -K file (the existence of which was triggered by #402).
613 While we were at it, introduced process PID as part of the -K
614 filename. This should rule out race conditions when creating
617 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
618 processing considerably. Previous code took too long for large mails,
619 triggering a timeout which in turn triggers #401.
621 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
622 in the DK code in transports.c. sendfile() is not really portable,
623 hence the _LINUX specificness.
625 TF/01 In the add_headers option to the mail command in an Exim filter,
626 there was a bug that Exim would claim a syntax error in any
627 header after the first one which had an odd number of characters
630 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
631 callout verification, Exim cached a "reject" for the entire domain. This
632 is correct for most verifications, but it is not correct for a recipient
633 verification with use_sender or use_postmaster set, because in that case
634 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
635 case of MAIL FROM:<> rejection from other early rejections (e.g.
636 rejection of HELO). When verifying a recipient using a non-null MAIL
637 address, the cache is ignored if it shows MAIL FROM:<> rejection.
638 Whatever the result of the callout, the value of the domain cache is
639 left unchanged (for any other kind of callout, getting as far as trying
640 RCPT means that the domain itself is ok).
642 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
645 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
646 manifest itself as EPIPE rather than ECONNECT. When tidying away a
647 session, the daemon ignores ECONNECT errors and logs others; it now
648 ignores EPIPE as well.
650 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
651 (quoted-printable decoding).
653 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
654 later the small subsequent patch to fix an introduced bug.
656 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
658 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
660 PH/08 An error is now given if message_size_limit is specified negative.
662 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
663 to be given (somewhat) arbitrary names.
665 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
668 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
669 miscellaneous code fixes
671 PH/10 Added the log_reject_target ACL modifier to specify where to log
674 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
675 hostname. This is wrong, because it relates to the incoming message (and
676 probably the interface on which it is arriving) and not to the outgoing
677 callout (which could be using a different interface). This has been
678 changed to use the value of the helo_data option from the smtp transport
679 instead - this is what is used when a message is actually being sent. If
680 there is no remote transport (possible with a router that sets up host
681 addresses), $smtp_active_hostname is used.
683 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
684 tweaks were necessary in order to get it to work (see also 21 below):
685 (a) The code assumed that strncpy() returns a negative number on buffer
686 overflow, which isn't the case. Replaced with Exim's string_format()
688 (b) There were several signed/unsigned issues. I just did the minimum
689 hacking in of casts. There is scope for a larger refactoring.
690 (c) The code used strcasecmp() which is not a standard C function.
691 Replaced with Exim's strcmpic() function.
692 (d) The code set only $1; it now sets $auth1 as well.
693 (e) A simple test gave the error "authentication client didn't specify
694 service in request". It would seem that Dovecot has changed its
695 interface. Fortunately there's a specification; I followed it and
696 changed what the client sends and it appears to be working now.
698 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
701 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
702 address A is aliased to B and C, where B exists and C does not. Without
703 -v the output is "A verified" because verification stops after a
704 successful redirection if more than one address is generated. However,
705 with -v the child addresses are also verified. Exim was outputting "A
706 failed to verify" and then showing the successful verification for C,
707 with its parentage. It now outputs "B failed to verify", showing B's
708 parentage before showing the successful verification of C.
710 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
711 look up a TXT record in a specific list after matching in a combined
714 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
715 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
716 they consult the DNS. I had assumed they would set it the way they
717 wanted; and indeed my experiments on Linux seem to show that in some
718 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
719 To be on the safe side, however, I have now made the interface to
720 host_find_byname() similar to host_find_bydns(), with an argument
721 containing the DNS resolver options. The host_find_byname() function now
722 sets these options at its start, just as host_find_bydns() does. The smtp
723 transport options dns_qualify_single and dns_search_parents are passed to
724 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
725 of host_find_byname() use the default settings of RES_DEFNAMES
726 (qualify_single) but not RES_DNSRCH (search_parents).
728 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
729 spool_read_header() do less string testing, by means of a preliminary
730 switch on the second character of optional "-foo" lines. (This is
731 overdue, caused by the large number of possibilities that now exist.
732 Originally there were few.) While I was there, I also converted the
733 str(n)cmp tests so they don't re-test the leading "-" and the first
734 character, in the hope this might squeeze out yet more improvement.
736 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
737 flag allowing group syntax was set by the header_syntax check but not
738 turned off, possible causing trouble later; (2) The flag was not being
739 set at all for the header_verify test, causing "group"-style headers to
740 be rejected. I have now set it in this case, and also caused header_
741 verify to ignore an empty address taken from a group. While doing this, I
742 came across some other cases where the code for allowing group syntax
743 while scanning a header line wasn't quite right (mostly, not resetting
744 the flag correctly in the right place). These bugs could have caused
745 trouble for malformed header lines. I hope it is now all correct.
747 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
748 with the "reply" argument non-NULL. The code, however (which originally
749 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
750 but it didn't always do it. This confused somebody who was copying the
751 code for some other use. I have removed all the tests.
753 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
754 feature that was used to support insecure browsers during the U.S. crypto
755 embargo. It requires special client support, and Exim is probably the
756 only MTA that supported it -- and would never use it because real RSA is
757 always available. This code has been removed, because it had the bad
758 effect of slowing Exim down by computing (never used) parameters for the
759 RSA_EXPORT functionality.
761 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
762 authenticator to fail if there's a tab character in the incoming data
763 (there should never be unless someone is messing about, as it's supposed
764 to be base64-encoded). Also added, on Timo's advice, the "secured" option
765 if the connection is using TLS or if the remote IP is the same as the
766 local IP, and the "valid-client-cert option" if a client certificate has
769 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
770 authenticators. This can be used for authorization after authentication
771 succeeds. (In the case of plaintext, it servers for both authentication
774 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
775 if any retry times were supplied.
777 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
778 connection, where there is no client IP address to check. In this
779 situation, the verify now always succeeds.
781 PH/25 Applied John Jetmore's -Mset patch.
783 PH/26 Added -bem to be like -Mset, but loading a message from a file.
785 PH/27 In a string expansion for a processed (not raw) header when multiple
786 headers of the same name were present, leading whitespace was being
787 removed from all of them, but trailing whitespace was being removed only
788 from the last one. Now trailing whitespace is removed from each header
789 before concatenation. Completely empty headers in a concatenation (as
792 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
793 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
795 PH/29 [Removed. This was a change that I later backed out, and forgot to
796 correct the ChangeLog entry (that I had efficiently created) before
797 committing the later change.]
799 PH/30 Exim was sometimes attempting to deliver messages that had suffered
800 address errors (4xx response to RCPT) over the same connection as other
801 messages routed to the same hosts. Such deliveries are always "forced",
802 so retry times are not inspected. This resulted in far too many retries
803 for the affected addresses. The effect occurred only when there were more
804 hosts than the hosts_max_try setting in the smtp transport when it had
805 the 4xx errors. Those hosts that it had tried were not added to the list
806 of hosts for which the message was waiting, so if all were tried, there
807 was no problem. Two fixes have been applied:
809 (i) If there are any address or message errors in an SMTP delivery, none
810 of the hosts (tried or untried) are now added to the list of hosts
811 for which the message is waiting, so the message should not be a
812 candidate for sending over the same connection that was used for a
813 successful delivery of some other message. This seems entirely
814 reasonable: after all the message is NOT "waiting for some host".
815 This is so "obvious" that I'm not sure why it wasn't done
816 previously. Hope I haven't missed anything, but it can't do any
817 harm, as the worst effect is to miss an optimization.
819 (ii) If, despite (i), such a delivery is accidentally attempted, the
820 routing retry time is respected, so at least it doesn't keep
821 hammering the server.
823 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
824 in ${readsocket because some servers need this prod.
826 PH/32 Added some extra debug output when updating a wait-xxx database.
828 PH/33 The hint "could be header name not terminated by colon", which has been
829 given for certain expansion errors for a long time, was not being given
830 for the ${if def:h_colon_omitted{... case.
832 PH/34 The spec says: "With one important exception, whenever a domain list is
833 being scanned, $domain contains the subject domain." There was at least
834 one case where this was not true.
836 PH/35 The error "getsockname() failed: connection reset by peer" was being
837 written to the panic log as well as the main log, but it isn't really
838 panic-worthy as it just means the connection died rather early on. I have
839 removed the panic log writing for the ECONNRESET error when getsockname()
842 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
843 runs only) independently of the message's sender address. This meant
844 that, if the 4xx error was in fact related to the sender, a different
845 message to the same recipient with a different sender could confuse
846 things. In particualar, this can happen when sending to a greylisting
847 server, but other circumstances could also provoke similar problems.
848 I have changed the default so that the retry time for these errors is now
849 based a combination of the sender and recipient addresses. This change
850 can be overridden by setting address_retry_include_sender=false in the
853 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
854 remote server are returned as part of bounce messages. This was not
855 happening for LMTP over a pipe (the lmtp transport), but now it is the
856 same for both kinds of LMTP.
858 PH/38 Despite being documented as not happening, Exim was rewriting addresses
859 in header lines that were in fact CNAMEs. This is no longer the case.
861 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
862 and queue runs started by the daemon processed all messages. This has
863 been fixed so that -R and -S can now usefully be given with -q<time>.
865 PH/40 Import PCRE release 6.7 (fixes some bugs).
867 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
869 PH/42 Give an error if -q is specified more than once.
871 PH/43 Renamed the variables $interface_address and $interface_port as
872 $received_ip_address and $received_port, to make it clear that these
873 values apply to message reception, and not to the outgoing interface when
874 a message is delivered. (The old names remain recognized, of course.)
876 PH/44 There was no timeout on the connect() call when using a Unix domain
877 socket in the ${readsocket expansion. There now is.
879 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
880 be meaningful with "accept".
882 SC/01 Eximstats V1.43
883 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
885 SC/02 Eximstats V1.44
886 Use a glob alias rather than an array ref in the generated
887 parser. This improves both readability and performance.
889 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
890 Collect SpamAssassin and rejection statistics.
891 Don't display local sender or destination tables unless
892 there is data to show.
893 Added average volumes into the top table text output.
895 SC/04 Eximstats V1.46
896 Collect data on the number of addresses (recipients)
897 as well as the number of messages.
899 SC/05 Eximstats V1.47
900 Added 'Message too big' to the list of mail rejection
901 reasons (thanks to Marco Gaiarin).
903 SC/06 Eximstats V1.48
904 Mainlog lines which have GMT offsets and are too short to
905 have a flag are now skipped.
907 SC/07 Eximstats V1.49 (Alain Williams)
908 Added the -emptyok flag.
910 SC/08 Eximstats V1.50
911 Fixes for obtaining the IP address from reject messages.
913 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
914 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
915 whitesspace changes from 4.64-PH/27
917 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
920 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
921 are found, allow negative numbers in numeric criteria)
923 JJ/06 exipick.20061117.2, added new $message_body_missing variable
925 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
926 to match changes made in 4.64-PH/43
928 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
930 PH/47 Put in an explicit test for a DNS lookup of an address record where the
931 "domain" is actually an IP address, and force a failure. This locks out
932 those revolvers/nameservers that support "A-for-A" lookups, in
933 contravention of the specifications.
935 PH/48 When a host name was looked up from an IP address, and the subsequent
936 forward lookup of the name timed out, the host name was left in
937 $sender_host_name, contrary to the specification.
939 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
940 restricted to single-key lookups, Exim was not diagnosing an error if
941 * or *@ was used with a query-style lookup.
943 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
945 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
946 long ago, but noone interested enough thought of it. Let's just say that
947 the "1.1" means that there are some new functions that weren't there at
948 some point in the past.
950 PH/51 Error processing for expansion failure of helo_data from an smtp
951 transport during callout processing was broken.
953 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
954 tested/used via the -bh/-bhc/-bs options.
956 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
957 bug, fixed in subsequent PCRE releases).
959 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
960 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
962 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
968 SC/01 Use a glob alias rather than an array ref in eximstats generated
969 parser. This improves both readability and performance.
971 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
972 Don't display local sender or destination tables in eximstats unless
973 there is data to show.
974 Added average volumes into the eximstats top table text output.
976 SC/03 Collect data on the number of addresses (recipients) as well
977 as the number of messages in eximstats.
979 TF/01 Correct an error in the documentation for the redirect router. Exim
980 does (usually) call initgroups() when daemonizing.
982 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
983 with consistent privilege compared to when running as a daemon.
985 TF/03 Note in the spec that $authenticated_id is not set for local
986 submissions from trusted users.
988 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
989 Thanks to Dean Brooks <dean@iglou.com> for the patch.
991 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
992 by adding some example configuration directives to the default
993 configuration file. A little bit of work is required to uncomment the
994 directives and define how usernames and passwords are checked, but
995 there is now a framework to start from.
997 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
998 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
999 without this. I don't know how relevant this is to other LDAP libraries.
1001 PH/02 Add the verb name to the "unknown ACL verb" error.
1003 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1005 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1007 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1008 directory not expanded when it should be if an expanded home directory
1009 was set for the address (which is overridden by the transport).
1011 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1014 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1015 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1016 because it is too late at that time, and has no effect.
1018 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1019 security issue with \' (bugzilla #107). I could not use the
1020 PQescapeStringConn() function, because it needs a PGconn value as one of
1023 PH/08 When testing addresses using -bt, indicate those final addresses that
1024 are duplicates that would not cause an additional delivery. At least one
1025 person was confused, thinking that -bt output corresponded to deliveries.
1026 (Suppressing duplicates isn't a good idea as you lose the information
1027 about possibly different redirections that led to the duplicates.)
1029 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1030 systems where poll() doesn't work, in particular OS X.
1032 PH/10 Added more information to debugging output for retry time not reached.
1034 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1035 operations in malware.c.
1037 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1040 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1041 syslog_duplication set false, log lines that would normally be written
1042 both the the main log and to the reject log were not written to syslog at
1045 PH/14 In the default configuration, change the use of "message" in ACL warn
1046 statements to "add_header".
1048 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1049 not followed by a command (e.g. "seen endif").
1051 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1052 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1055 PH/17 Added extra conditions to the default value of delay_warning_condition
1059 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1060 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1061 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1064 The Auto-Submitted: and various List- headers are standardised, whereas I
1065 don't think Precedence: ever was.
1067 PH/18 Refactored debugging code in route_finduser() to show more information,
1068 in particular, the error code if getpwnam() issues one.
1070 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1071 This is apparently needed in addition to the PH/07 change above to avoid
1072 any possible encoding problems.
1074 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1075 but not after initializing Perl.
1077 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1078 output them only if debugging. By default they are written stderr,
1079 apparently, which is not desirable.
1081 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1084 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1087 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1089 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1090 authenticated or an ident call has been made. Suppress the default
1091 values for $authenticated_id and $authenticated_sender (but permit -oMai
1092 and -oMas) when testing with -bh.
1094 PH/24 Re-jigged the order of the tests in the default configuration so that the
1095 tests for valid domains and recipients precede the DNS black list and CSA
1096 tests, on the grounds that those ones are more expensive.
1098 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1099 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1100 This bug exists in every version of Exim that I still have, right back to
1103 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1104 However, an attempt to turn on case-sensitivity in a regex key by
1105 including (?-i) didn't work because the subject string was already
1106 lowercased, and the effects were non-intuitive. It turns out that a
1107 one-line patch can be used to allow (?-i) to work as expected.
1113 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1114 other effects) broke the use of negated acl sub-conditions.
1116 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1119 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1120 "Deny" causes Exim to reject the incoming connection with a 554 error.
1121 Unfortunately, if there is a major crisis, such as a disk failure,
1122 tcp-wrappers gives "deny", whereas what one would like would be some
1123 kind of temporary error. A kludge has been added to help with this.
1124 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1125 554 error is used if errno is still zero or contains ENOENT (which occurs
1126 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1129 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1131 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1132 errors. Otherwise a message that provokes a temporary error (when other
1133 messages do not) can cause a whole host to time out.
1135 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1136 addresses were routed directly to files or pipes from a redirect router.
1137 File deliveries just didn't batch; pipe deliveries might have suffered
1140 PH/06 A failure to get a lock for a hints database would erroneously always say
1141 "Failed to get write lock", even when it was really a read lock.
1143 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1144 of 0600. This has been changed to use the value of the lockfile_mode
1145 option (which defaults to 0600).
1147 PH/08 Applied small patch from the Sieve maintainer.
1149 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1150 folder from quota calculations, a direct delivery into this folder messed
1151 up the contents of the maildirsize file. This was because the regex was
1152 used only to exclude .Trash (or whatever) when the size of the mailbox
1153 was calculated. There was no check that a delivery was happening into an
1154 excluded directory. This bug has been fixed by ignoring all quota
1155 processing for deliveries into excluded directories.
1157 PH/10 Added the maildirfolder_create_regex option to appendfile.
1163 PH/01 The code for finding all the local interface addresses on a FreeBSD
1164 system running IPv6 was broken. This may well have applied to all BSD
1165 systems, as well as to others that have similar system calls. The broken
1166 code found IPv4 interfaces correctly, but gave incorrect values for the
1167 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1168 that it would not match correctly against @[] and not recognize the IPv6
1171 PH/02 The ipliteral router was not recognizing addresses of the form user@
1172 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1174 PH/03 Added disable_ipv6.
1176 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1177 decoded form, because it is most often used to construct To: headers
1178 lines in autoreplies, and the decoded form may well be syntactically
1179 invalid. However, $reply_address has leading white space removed, and all
1180 newlines turned into spaces so that the autoreply transport does not
1183 PH/05 If group was specified without a user on a router, and no group or user
1184 was specified on a transport, the group from the router was ignored.
1186 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1187 for visible compile-time settings that can be used to change these
1188 numbers, for those that want even more. Backwards compatibility with old
1189 spool files has been maintained. However, going back to a previous Exim
1190 release will lost any variables that are in spool files.
1192 PH/07 Two small changes when running in the test harness: increase delay when
1193 passing a TCP/IP connection to a new process, in case the original
1194 process has to generate a bounce, and remove special handling of
1195 127.0.0.2 (sic), which is no longer necessary.
1197 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1198 be the same on different OS.
1200 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1203 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1204 whether --show-vars was specified or not
1206 JJ/02 exipick: Added support for new ACL variable spool format introduced
1209 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1210 syntactically invalid From: or Reply-to: line, and a filter used this to
1211 generate an autoreply, and therefore failed to obtain an address for the
1212 autoreply, Exim could try to deliver to a non-existent relative file
1213 name, causing unrelated and misleading errors. What now happens is that
1214 it logs this as a hard delivery error, but does not attempt to create a
1217 PH/11 The exinext utility has a -C option for testing purposes, but although
1218 the given file was scanned by exinext itself; it wasn't being passed on
1219 when Exim was called.
1221 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1222 an end-of-file indication when reading a command response.
1224 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1225 compiled. In many other places in Exim, IPv6 addresses are always
1226 recognized, so I have changed this. It also means that IPv4 domain
1227 literals of the form [IPV4:n.n.n.n] are now always recognized.
1229 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1230 used if the router is not running as root, for example, when verifying at
1231 ACL time, or when using -bh. The debugging output from this situation was
1232 non-existent - all you got was a failure to exec. I have made two
1235 (a) Failures to set uid/gid, the current directory, or a process leader
1236 in a subprocess such as that created by queryprogram now generate
1237 suitable debugging ouput when -d is set.
1239 (b) The queryprogram router detects when it is not running as root,
1240 outputs suitable debugging information if -d is set, and then runs
1241 the subprocess without attempting to change uid/gid.
1243 PH/15 Minor change to Makefile for building test_host (undocumented testing
1246 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1247 additional section of a DNS packet that returns MX or SRV records.
1248 Instead, it always explicitly searches for A/AAAA records. This avoids
1249 major problems that occur when a DNS server includes only records of one
1250 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1251 fixed another bug: if SRV records were looked up and the corresponding
1252 address records were *not* found in the additional section, the port
1253 values from the SRV records were lost.
1255 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1256 using the correct key (the original address) when searching the retry
1257 rules in order to find which one to use for generating the retry hint.
1259 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1260 adding the default one. Similarly, if it contains a Reply-To: header, the
1261 errors_reply_to option, if set, is not used.
1263 PH/19 When calculating a retry time, Exim used to measure the "time since
1264 failure" by looking at the "first failed" field in the retry record. Now
1265 it does not use this if it is later than than the arrival time of the
1266 message. Instead it uses the arrival time. This makes for better
1267 behaviour in cases where some deliveries succeed, thus re-setting the
1268 "first failed" field. An example is a quota failure for a huge message
1269 when small messages continue to be delivered. Without this change, the
1270 "time since failure" will always be short, possible causing more frequent
1271 delivery attempts for the huge message than are intended.
1272 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1274 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1275 $1, $2, $3) because the numerical variables can be reset during some
1276 expansion items (e.g. "match"), thereby losing the authentication data.
1278 PH/21 Make -bV show the size of off_t variables so that the test suite can
1279 decide whether to run tests for quotas > 2G.
1281 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1282 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1283 filecount value is greater than 2G or if a quota value is greater than 2G
1284 on a system where the size of off_t is not greater than 4, a panic error
1287 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1288 never match. The debug and -bh output now contains an explicit error
1289 message indicating a malformed IPv4 address or mask.
1291 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1292 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1293 PH/23 above applies.
1295 PH/25 Do not write to syslog when running in the test harness. The only
1296 occasion when this arises is a failure to open the main or panic logs
1297 (for which there is an explicit test).
1299 PH/26 Added the /no_tell option to "control=freeze".
1301 PH/27 If a host name lookup failed very early in a connection, for example, if
1302 the IP address matched host_lookup and the reverse lookup yielded a name
1303 that did not have a forward lookup, an error message of the form "no IP
1304 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1305 could be logged. Now it outputs the IP address instead of "NULL".
1307 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1308 allows the sender and the authenticated sender to be set when
1309 submitting a message from within Exim. Since child_open_exim() is
1310 documented for local_scan(), the new function should be too.
1312 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1313 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1314 results in an empty string is now treated as unset.
1316 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1318 PH/31 Added sender_verify_fail logging option.
1320 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1321 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1322 tidied the source and removed it altogether.
1324 PH/33 When a queue run was abandoned because the load average was too high, a
1325 log line was always written; now it is written only if the queue_run log
1326 selector is set. In addition, the log line for abandonment now contains
1327 information about the queue run such as the pid. This is always present
1328 in "start" and "stop" lines but was omitted from the "abandon" line.
1330 PH/34 Omit spaces between a header name and the colon in the error message that
1331 is given when verify = headers_syntax fails (if there are lots of them,
1332 the message gets confusing).
1334 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1335 names, as there are now some PTR records that contain slashes. This check
1336 is only to protect against broken name servers that fall over on strange
1337 characters, so the fact that it applies to all lookups doesn't matter.
1339 PH/36 Now that the new test suite is complete, we can remove some of the
1340 special code in Exim that was needed for the old test suite. For example,
1341 sorting DNS records because real resolvers return them in an arbitrary
1342 order. The new test suite's fake resolver always returns records in the
1345 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1346 bounces) except when queue_only is set, to avoid logging races between
1347 the different processes.
1349 PH/38 Panic-die if .include specifies a non-absolute path.
1351 PH/39 A tweak to the "H" retry rule from its user.
1353 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1354 a label. They prevented compilation on older perls.
1356 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1357 a warning to be raised on newish perls.
1359 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1360 on queue. Changes to match documented behaviour of showing count of
1361 messages matching specified criteria.
1363 PH/40 Changed the default ident timeout from 30s to 5s.
1365 PH/41 Added support for the use of login_cap features, on those BSD systems
1366 that have them, for controlling the resources used by pipe deliveries.
1368 PH/42 The content-scanning code uses fopen() to create files in which to put
1369 message data. Previously it was not paying any attention to the mode of
1370 the files. Exim runs with umask(0) because the rest of the code creates
1371 files with open(), and sets the required mode explicitly. Thus, these
1372 files were ending up world-writeable. This was not a big issue, because,
1373 being within the spool directory, they were not world-accessible. I have
1374 created a function called modefopen, which takes an additional mode
1375 argument. It sets umask(777), creates the file, chmods it to the required
1376 mode, then resets the umask. All the relevant calls to fopen() in the
1377 content scanning code have been changed to use this function.
1379 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1380 to 24 hours. This avoids potential overflow problems when processing G
1381 and H retry rules. I suspect nobody ever tinkers with this value.
1383 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1385 PH/45 When the plaintext authenticator is running as a client, the server's
1386 challenges are checked to ensure they are valid base64 strings. By
1387 default, the authentication attempt is cancelled if an invalid string is
1388 received. Setting client_ignore_invalid_base64 true ignores these errors.
1389 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1390 they are received. Thus, the responses can be made to depend on the
1391 challenges. If an invalid string is ignored, an empty string is placed in
1394 PH/46 Messages that are created by the autoreply transport now contains a
1395 References: header, in accordance with RFCs 2822 and 3834.
1397 PH/47 Added authenticated_sender_force to the smtp transport.
1399 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1401 PH/49 Installed latest patch from the Sieve maintainer.
1403 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1404 was also set, the appendfile transport was unnecessarily scanning a
1405 directory of message files (e.g. for maildir delivery) to find the count
1406 of files (along with the size), even though it did not need this
1407 information. It now does the scan only if it needs to find either the
1408 size of the count of files.
1410 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1412 PH/52 Two bugs concerned with error handling when the smtp transport is
1415 (i) Exim was not creating retry information for temporary errors given
1416 for individual recipients after the DATA command when the smtp transport
1417 was used in LMTP mode. This meant that they could be retried too
1418 frequently, and not timed out correctly.
1420 (ii) Exim was setting the flag that allows error details to be returned
1421 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1422 recipients that were returned after the DATA command.
1424 PH/53 This is related to PH/52, but is more general: for any failing address,
1425 when detailed error information was permitted to be returned to the
1426 sender, but the error was temporary, then after the final timeout, only
1427 "retry timeout exceeded" was returned. Now it returns the full error as
1428 well as "retry timeout exceeded".
1430 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1431 do this, and (what is worse) MTAs that accept it.
1433 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1434 will now be deprecated.
1436 PH/56 New os.c-cygwin from the Cygwin maintainer.
1438 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1439 formats (previously only available in exim formats via -bpr, -bpru,
1440 and -bpra. Now also available in native and exiqgrep formats)
1442 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1443 with very large, slow to parse queues
1445 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1447 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1449 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1450 responses to authentication challenges, though it was showing the
1451 challenges; (ii) I've removed the CR characters from the debug output for
1454 PH/58 Allow for the insertion of a newline as well as a space when a string
1455 is turned into more than one encoded-word during RFC 2047 encoding. The
1456 Sieve code now uses this.
1458 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1459 data_4xx, lost_connection, tls_required.
1461 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1462 message was being sent as an SMTP response.
1464 PH/61 Add -l and -k options to exicyclog.
1466 PH/62 When verifying, if an address was redirected to one new address, so that
1467 verification continued, and the new address failed or deferred after
1468 having set something in $address_data, the value of $address_data was not
1469 passed back to the ACL. This was different to the case when no
1470 redirection occurred. The value is now passed back in both cases.
1472 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1473 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1474 use login_cap.h, so on its own it isn't the distinguishing feature. The
1475 new name refers directly to the setclassresources() function.
1477 PH/65 Added configuration files for NetBSD3.
1479 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1481 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1482 is preferred over IPv4.
1484 PH/68 The bounce_return_message and bounce_return_body options were not being
1485 honoured for bounces generated during the reception of non-SMTP messages.
1486 In particular, this applied to messages rejected by the ACL. This bug has
1487 been fixed. However, if bounce_return_message is true and bounce_return_
1488 body is false, the headers that are returned for a non-SMTP message
1489 include only those that have been read before the error was detected.
1490 (In the case of an ACL rejection, they have all been read.)
1492 PH/69 The HTML version of the specification is now built in a directory called
1493 spec_html instead of spec.html, because the latter looks like a path with
1494 a MIME-type, and this confuses some software.
1496 PH/70 Catch two compiler warnings in sieve.c.
1498 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1499 function verify_get_ident() calls ip_connect() to connect a socket, but
1500 if the "connect()" function timed out, ip_connect() used to close the
1501 socket. However, verify_get_ident() also closes the socket later, and in
1502 between Exim writes to the log, which may get opened at this point. When
1503 the socket was closed in ip_connect(), the log could get the same file
1504 descriptor number as the socket. This naturally causes chaos. The fix is
1505 not to close the socket in ip_connect(); the socket should be closed by
1506 the function that creates it. There was only one place in the code where
1507 this was missing, in the iplookup router, which I don't think anybody now
1508 uses, but I've fixed it anyway.
1510 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1511 well as to direct DNS lookups. Otherwise the handling of names in host
1512 lists is inconsistent and therefore confusing.
1518 PH/01 Two changes to the default runtime configuration:
1520 (1) Move the checks for relay_from_hosts and authenticated clients from
1521 after to before the (commented out) DNS black list checks.
1523 (2) Add control=submission to the relay_from_hosts and authenticated
1524 clients checks, on the grounds that messages accepted by these
1525 statements are most likely to be submissions.
1527 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1529 (1) Generate an error if the third argument for the ${prvs expansion is
1532 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1535 (3) Reset the variables that are obtained from the first argument of
1536 ${prvscheck and used in the second argument before leaving the code,
1537 because their memory is reclaimed, so using them afterwards may do
1540 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1541 one (it's much easier than Tom thought :-).
1543 (5) Because of (4), we can now allow for the use of $prvscheck_result
1544 inside the third argument.
1546 PH/03 For some reason, the default setting of PATH when running a command from
1547 a pipe transport was just "/usr/bin". I have changed it to
1550 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1551 anything to be listed in the output from -bV.
1553 PH/05 When a filter generated an autoreply, the entire To: header line was
1554 quoted in the delivery log line, like this:
1556 => >A.N.Other <ano@some.domain> <original@ddress> ...
1558 This has been changed so that it extracts the operative address. There
1559 may be more than one such address. If so, they are comma-separated, like
1562 => >ano@some.domain,ona@other.domain <original@ddress> ...
1564 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1565 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1566 not being looked up in the rDNS to get a host name, Exim was showing the
1567 IP address twice in Received: lines, even though the IP addresses were
1568 identical. For example:
1570 Received: from [1.2.3.4] (helo=[1.2.3.4])
1572 However, if the real host name was known, it was omitting the HELO data
1573 if it matched the actual IP address. This has been tidied up so that it
1574 doesn't show the same IP address twice.
1576 PH/07 When both +timestamp and +memory debugging was on, the value given by
1577 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1578 called by the debug printing, thereby overwriting the timestamp buffer.
1579 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1581 PH/08 When the original message was included in an autoreply transport, it
1582 always said "this is a copy of the message, including all the headers",
1583 even if body_only or headers_only was set. It now gives an appropriate
1586 PH/09 Applied a patch from the Sieve maintainer which:
1588 o fixes some comments
1589 o adds the (disabled) notify extension core
1590 o adds some debug output for the result of if/elsif tests
1591 o points to the current vacation draft in the documentation
1592 and documents the missing references header update
1596 o fixes a bug in processing the envelope test (when testing
1597 multiple envelope elements, the last element determinted the
1600 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1601 Electronic Mail") by including:
1603 Auto-submitted: auto-generated
1605 in the messages that it generates (bounce messages and others, such as
1606 warnings). In the case of bounce messages for non-SMTP mesages, there was
1607 also a typo: it was using "Auto_submitted" (underscore instead of
1608 hyphen). Since every message generated by Exim is necessarily in response
1609 to another message, thes have all been changed to:
1611 Auto-Submitted: auto-replied
1613 in accordance with these statements in the RFC:
1615 The auto-replied keyword:
1617 - SHOULD be used on messages sent in direct response to another
1618 message by an automatic process,
1620 - MUST NOT be used on manually-generated messages,
1622 - MAY be used on Delivery Status Notifications (DSNs) and Message
1623 Disposition Notifications (MDNs),
1625 - MUST NOT be used on messages generated by automatic or periodic
1626 processes, except for messages which are automatic responses to
1629 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1630 to the default Received: header definition.
1632 PH/12 Added log selector acl_warn_skipped (default on).
1634 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1635 variables because (a) they are in the wrong storage pool and (b) even if
1636 they were copied, it wouldn't work properly because of the caching.
1638 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1639 checking when decoding. Apparently there are clients that generate
1640 overlong encoded strings. Why am I not surprised?
1642 PH/15 If the first argument of "${if match_address" was not empty, but did not
1643 contain an "@" character, Exim crashed. Now it writes a panic log message
1644 and treats the condition as false.
1646 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1648 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1649 extension "envelope-auth". The code is finished and in agreement with
1650 other implementations, but there is no documentation so far and in fact,
1651 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1652 not changing the active code.
1654 Print executed "if" and "elsif" statements when debugging is used. This
1655 helps a great deal to understand what a filter does.
1657 Document more things not specified clearly in RFC3028. I had all this
1658 sorted out, when out of a sudden new issues came to my mind. Oops."
1660 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1663 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1664 canonical form (as documented). However, after a host name lookup from
1665 the IP address, check_host() was doing a simple string comparison with
1666 addresses acquired from the DNS when checking that the found name did
1667 have the original IP as one of its addresses. Since any found IPv6
1668 addresses are likely to be in abbreviated form, the comparison could
1669 fail. Luckily, there already exists a function for doing the comparison
1670 by converting both addresses to binary, so now that is used instead of
1671 the text comparison.
1673 PH/20 There was another similar case to PH/19, when a complete host name was
1674 given in a host list; looking up its IP address could give an abbreviated
1675 form, whereas the current host's name might or might not be abbreviated.
1676 The same fix has been applied.
1682 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1683 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1686 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1687 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1689 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1691 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1692 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1693 Also, for "Auto-Submitted", treat anything other than "no" as
1694 non-personal, in accordance with RFC 3834. (Previously it treated
1695 anything starting "auto-" as non-personal.)
1697 TF/01 The control=submission/name=... option had a problem with syntax
1698 errors if the name included a slash character. The /name= option
1699 now slurps the rest of the string, so it can include any characters
1700 but it must come last in the list of options (after /sender_retain
1703 PH/05 Some modifications to the interface to the fake nameserver for the new
1711 TK/01 Added the "success_on_redirect" address verification option. See
1712 NewStuff for rationale and an example.
1714 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1716 PH/02 Patch to exigrep to allow it to work on syslog lines.
1718 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1719 fread() to skip over the body file's header line, because in Cygwin the
1720 header line is locked and is inaccessible.
1722 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1723 co-exist for some time) to make it clear that it is the Exim ID that is
1724 referenced, not the Message-ID: header line.
1726 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1727 string_format() function, because snprintf() does not exist on all
1730 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1731 ${stat: expansion item.
1733 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1734 protocol synchronization error", to keep the pedants happy.
1736 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1737 well as for IRIX systems, when gcc is being used. See the host.c source
1740 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1742 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1745 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1746 transport and to the smtp transport in LMTP mode.
1748 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1750 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1751 run a filter in a subprocess. This could lead to confusion in subsequent
1752 lookups in the parent process. There should also be a search_tidyup() at
1753 the end of the subprocess.
1755 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1756 only if the host matched helo_try_verify_hosts, which caused the
1757 verification to occur when the EHLO/HELO command was issued. The ACL just
1758 tested the remembered result. Now, if a previous verification attempt has
1759 not happened, "verify = helo" does it there and then.
1761 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1763 TK/03 Fix log output including CR from clamd.
1765 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1766 exist provoked a memory error which could cause a segfault.
1768 PH/15 Installed PCRE 6.2
1770 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1772 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1773 of the problem. Specifically, suggested +O2 rather than +O1 for the
1776 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1778 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1779 record, the port was not correctly logged when the outgoing_port log
1780 selector was set (it logged the transort's default port).
1782 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1783 fallback_hosts, and "hosts" in the smtp transport.
1785 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1786 host errors such as "Connection refused".
1788 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1789 authentication with radiusclient 0.4.9:
1791 - Error returned from rc_read_config was caught wrongly
1792 - Username/password not passed on to radius server due to wrong length.
1794 The presumption is that some radiusclient API changes for 4.51/PH/17
1795 were not taken care of correctly. The code is still untested by me (my
1796 Linux distribution still has 0.3.2 of radiusclient), but it was
1797 contributed by a Radius user.
1799 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1800 expanding the "port" option of the smtp transport.
1802 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1803 while reading a MIME header. Thanks to Tom Hughes for a patch.
1805 PH/24 Include config.h inside local_scan.h so that configuration settings are
1808 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1809 that in an ACL for RCPT (for example), you can examine exactly what was
1812 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1813 commands, but it was not correctly comparing the address with the actual
1814 client host address. Thus, it would show the EHLO address in Received:
1815 header lines when this was not necessary.
1817 PH/27 Added the % operator to ${eval:}.
1819 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1820 it should be ignoring failures (because with -C, for example, it has lost
1821 privilege). It wasn't ignoring creation failures other than "already
1824 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1827 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1828 because an input line was too long, either on its own, or by virtue of
1829 too many continuations, the temporary file was not being removed, and the
1830 return code was incorrect.
1832 PH/31 Missing "BOOL" in function definition in filtertest.c.
1834 PH/32 Applied Sieve patches from the maintainer.
1836 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1838 PH/33 Added "verify = not_blind".
1840 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1841 Local/Makefile (with some defaults set). These are used in built scripts
1842 such as exicyclog, but they have never been used in the exim_install
1843 script (though there are many overriding facilities there). I have
1844 arranged that the exim_install script now takes note of these two
1847 PH/35 Installed configuration files for Dragonfly.
1849 PH/36 When a locally submitted message by a trusted user did not contain a
1850 From: header, and the sender address was obtained from -f or from an SMTP
1851 MAIL command, and the trusted user did not use -F to supply a sender
1852 name, $originator_name was incorrectly used when constructing a From:
1853 header. Furthermore, $originator_name was used for submission mode
1854 messages from external hosts without From: headers in a similar way,
1855 which is clearly wrong.
1857 PH/37 Added control=suppress_local_fixups.
1859 PH/38 When log_selector = +received_sender was set, and the addition of the
1860 sender made the log line's construction buffer exactly full, or one byte
1861 less than full, an overflow happened when the terminating "\n" was
1864 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1865 when the result of a list match is failure because a DNS lookup failed.
1867 PH/40 RM_COMMAND is now used in the building process.
1869 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1870 the "build-* directories that it finds.
1872 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1873 address in a domain literal was a prefix of an interface address.
1875 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1876 when verifying a sender address, unless rewrite_headers is false.
1878 PH/44 Wrote a long comment about why errors_to addresses are verified as
1879 recipients, not senders.
1881 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1882 the ratelimit ACL was added.
1884 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1886 PH/46 Added extra information about PostgreSQL errors to the error string.
1888 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1889 avoiding the need to install special zones in a real server. This is
1890 backwards compatible; if it can't find the fake resolver, it drops back.
1891 Thus, both old and new test suites can be run.
1893 TF/02 Added util/ratelimit.pl
1895 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1896 clock is set back in time.
1898 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1899 Candler <B.Candler@pobox.com>.
1901 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1902 OK for addresses that are the result of redirections.
1904 PH/48 A number of further additions for the benefit of the new test suite,
1905 including a fake gethostbyname() that interfaces to the fake DNS resolver
1908 TF/06 The fix for widen_domains has also been applied to qualify_single and
1909 search_parents which are the other dnslookup options that can cause
1912 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1915 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1917 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1918 service" if it encountered an MX record with an empty target hostname.
1919 The message is now "an MX or SRV record indicated no SMTP service".
1921 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1922 if the DNS of the sending site is misconfigured. This is quite a
1923 common situation. This change restores the behaviour of treating a
1924 helo verification defer as a failure.
1926 PH/51 If self=fail was set on a router, the bounce message did not include the
1927 actual error message.
1933 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1935 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1936 command itself ended in error, the underlying message about the transport
1937 filter timeout was being overwritten with the pipe command error. Now the
1938 underlying error message should be appended to the second error message.
1940 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1942 PH/02 Reduce the amount of output that "make" produces by default. Full output
1943 can still be requested.
1945 PH/03 The warning log line about a condition test deferring for a "warn" verb
1946 was being output only once per connection, rather than after each
1947 occurrence (because it was using the same function as for successful
1948 "warn" verbs). This seems wrong, so I have changed it.
1950 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1951 it should not have, which might have caused a crash in the right
1952 circumstances, but probably never did.
1954 PH/04 Installed a modified version of Tony Finch's patch to make submission
1955 mode fix the return path as well as the Sender: header line, and to
1956 add a /name= option so that you can make the user's friendly name appear
1959 TF/03 Added the control = fakedefer ACL modifier.
1961 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1962 Mark Lowes for thorough testing.
1964 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1966 TK/03 Merged latest SRS patch from Miles Wilton.
1968 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1969 with the definition in sysexits.h (which is #included earlier).
1970 Fortunately, Exim does not actually use EX_OK. The code used to try to
1971 preserve the sysexits.h value, by assumimg that macro definitions were
1972 scanned for macro replacements. I have been disabused of this notion,
1973 so now the code just undefines EX_OK before #including unistd.h.
1975 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1976 in the smtp transport. When a block could not be written in a single
1977 write() function, the timeout was being re-applied to each part-write.
1978 This seems wrong - if the receiver was accepting one byte at a time it
1979 would take for ever. The timeout is now adjusted when this happens. It
1980 doesn't have to be particularly precise.
1982 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1983 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1985 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1986 without a domain if the check to <postmaster@domain> fails.
1988 SC/01 Eximstats: added -xls and the ability to specify output files
1989 (patch written by Frank Heydlauf).
1991 SC/02 Eximstats: use FileHandles for outputing results.
1993 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1995 SC/04 Eximstats: fixed display of large numbers with -nvr option
1997 SC/05 Eximstats: fixed merging of reports with empty tables.
1999 SC/06 Eximstats: added the -include_original_destination flag
2001 SC/07 Eximstats: removed tabs and trailing whitespace.
2003 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2005 TK/06 MBOX spool code: Add real "From " MBOX separator line
2006 so the .eml file is really in mbox format (even though
2007 most programs do not really care). Patch from Alex Miller.
2009 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2010 The latter is generated from $received_to and is only set if the
2011 message has one envelope recipient. SA can use these headers,
2012 obviously out-of-the-box. Patch from Alex Miller.
2014 PH/08 The ${def test on a variable was returning false if the variable's
2015 value was "0", contrary to what the specification has always said!
2016 The result should be true unless the variable is empty.
2018 PH/09 The syntax error of a character other than { following "${if
2019 def:variable_name" (after optional whitespace) was not being diagnosed.
2020 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2021 accidental colon was present, for example, could give incorrect results.
2023 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2024 result is used (not including appendfile, where other changes are about
2027 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2028 This involved changing a lot of size variables from int to off_t. It
2029 should work with maildirs and everything.
2031 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2032 spamd dying while we are connected to it.
2034 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2037 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2038 function for BDB 4.3.
2040 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2042 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2043 the sources for PCRE have been re-arranged and more files are now
2046 PH/15 The code I had for printing potentially long long variables in PH/11
2047 above was not the best (it lost precision). The length of off_t variables
2048 is now inspected at build time, and an appropriate printing format (%ld
2049 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2050 to be "long long int" or "long int". This is needed for the internal
2051 formatting function string_vformat().
2053 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2054 the configuration file to be ":syslog", then the script "guesses" where
2055 the logs files are, rather than using the compiled in default. In our
2056 case the guess is not the same as the compiled default, so the script
2057 suddenly stopped working when I started to use syslog. The patch checks
2058 to see if log_file_path is "". If so, it attempts to read it from exim
2059 with no configuration file to get the compiled in version, before it
2060 falls back to the previous guessing code."
2062 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2063 implementing BATV in an Exim configuration. See NewStuff for the gory
2066 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2067 Makefile that are specific to HP-UX.
2069 PH/18 If the "use_postmaster" option was set for a recipient callout together
2070 with the "random" option, the postmaster address was used as the MAIL
2071 FROM address for the random test, but not for the subsequent recipient
2072 test. It is now used for both.
2074 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2075 patch removes a few documentation additions to RFC 3028, because the
2076 latest draft now contains them. It adds the new en;ascii-case comparator
2077 and a new error check for 8bit text in MIME parts. Comparator and
2078 require names are now matched exactly. I enabled the subaddress
2079 extension, but it is not well tested yet (read: it works for me)."
2081 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2082 rework some of the code of TK/09 above to avoid the hardwired use of
2083 "%lld" and "long long". Replaced the call to snprintf() with a call to
2086 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2087 records point to non-existent hosts", "retry timeout exceeded", and
2088 "retry time not reached for any host after a long failure period".
2090 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2091 experimental DomainKeys support:
2093 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2094 (2) On an error such as an illegally used "control", the wrong name for
2095 the control was given.
2097 These problems did NOT occur unless DomainKeys support was compiled.
2099 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2101 PH/24 Added ${if match_ip condition.
2103 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2104 databases so that it will be absolutely obvious if a crash occurs in the
2105 DB library. This is a regular occurrence (often caused by mis-matched
2108 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2109 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2110 picked up on a user's system that detects such things. There doesn't seem
2111 to be a gcc warning option for this - only an attribute that has to be
2112 put on the function's prototype. It seems that in Fedora Core 4 they have
2113 set this on a number of new functions. No doubt there will be more in due
2116 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2117 specify a transport. However, if an address that was verified by such a
2118 router was the subject of a callout, Exim crashed because it tried to
2119 read the rcpt_include_affixes from the non-existent transport. Now it
2120 just assumes that the setting of that option is false. This bug was
2121 introduced by 4.51/PH/31.
2123 PH/28 Changed -d+all to exclude +memory, because that information is very
2124 rarely of interest, but it makes the output a lot bigger. People tend to
2125 do -d+all out of habit.
2127 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2128 code in os-type was giving problems when libc.so lives in lib64, like on
2131 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2132 aren't the modern standard, and it seems that some systems' include files
2133 don't always have them. Exim was already checking for some of the newer
2134 ones like T_AAAA, and defining it itself. I've added checks for all the
2135 record types that Exim uses.
2137 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2138 not automatically generating a new one, as it is supposed to. This
2139 prevented TLS from working. If the file did exist, but contained invalid
2140 data, a new version was generated, as expected. It was only the case of a
2141 non-existent file that was broken.
2143 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2144 with a change in libdomainkeys > 0.64.
2146 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2147 from DNS. If the selector record carries the flag, it now has
2148 precedence over the domain-wide flag.
2150 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2152 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2153 the use of a port name that isn't defined in /etc/services) occurred, the
2154 message was deferred as in a normal delivery, and thus remained on the
2155 spool, instead of being failed because of the mua_wrapper setting. This
2156 is now fixed, and I tidied up some of the mua_wrapper messages at the
2159 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2160 the messages in a hash of arrays rather than using individual hashes.
2161 This is a bit cleaner and results in dramatic memory savings, albeit
2162 at a slight CPU cost.
2164 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2165 as requested by Marc Sherman.
2167 SC/10 Eximstats: added histograms for user specified patterns as requested
2170 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2172 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2173 fopen() in the content-scanning modules that did not already have it.
2179 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2180 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2182 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2184 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2186 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2187 to test Sieve filters that use "vacation".
2189 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2190 that changes the way the GnuTLS parameters are stored in the cache file.
2191 The new format can be generated externally. For backward compatibility,
2192 if the data in the cache doesn't make sense, Exim assumes it has read an
2193 old-format file, and it generates new data and writes a new file. This
2194 means that you can't go back to an older release without removing the
2197 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2198 work if there are any delivery delays because "one_time" forces the
2199 parent to be marked "delivered", so its unseen clone is never tried
2200 again. For this reason, Exim now forbids the simultaneous setting of
2203 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2204 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2205 entry if you want to know the details. The fix, however, neglected to
2206 consider the case when local delivery batching is involved. The test for
2207 "previously delivered" was not happening when checking to see if an
2208 address could be batched with a previous (undelivered) one; under
2209 certain circumstances this could lead to multiple deliveries to the same
2212 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2213 in its include files, and this causes problems building Exim.
2215 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2216 header_syntax) but Exim was just ignoring anything given after a slash.
2217 In particular, this caused confusion with an attempt to use "verify =
2218 reverse_host_lookup/defer_ok". An error is now given when options are
2219 supplied for verify items that do not have them. (Maybe reverse_host_
2220 lookup should have a defer_ok option, but that's a different point.)
2222 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2223 defined by RFC 821) to 2048, because there were problems with some AUTH
2224 commands, and RFC 1869 says the size should be increased for extended
2225 SMTP commands that take arguments.
2227 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2230 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2231 "unknown" error; now it says that the functionality isn't in the binary.
2233 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2234 an address' error message when a string expansion fails (syntax or
2235 whatever). Otherwise the password may appear in the log. Following change
2236 PH/42 below, there is no longer a chance of it appearing in a bounce
2239 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2241 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2242 of its addresses was ever tried. (Bugzilla bug #2.)
2244 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2245 the result incorrectly in the debug output. (It correctly added a newline
2246 to what was transported.)
2248 TF/01 Added $received_time.
2250 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2251 commented out examples of how to interface to a virus scanner and to
2252 SpamAssassin. Also added commented examples of av_scanner and
2253 spamd_address settings.
2255 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2256 and controls are allowed in which ACLs. There were a couple of minor
2257 errors. Some of the entries in the conditions table (which is a table of
2258 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2259 negation of where the condition IS allowed.
2261 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2263 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2264 header file does not have a version number, so I've had to invent a new
2265 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2266 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2267 radiusclient), but it was contributed by a Radius user.
2269 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2270 files or directories, for OpenSSL.
2272 PH/19 When an Exim process that is running as root has to create an Exim log
2273 file, it does so in a subprocess that runs as exim:exim so as to get the
2274 ownership right at creation (otherwise, other Exim processes might see
2275 the file with the wrong ownership). There was no test for failure of this
2276 fork() call, which would lead to the process getting stuck as it waited
2277 for a non-existent subprocess. Forks do occasionally fail when resources
2278 run out. I reviewed all the other calls to fork(); they all seem to check
2281 PH/20 When checking for unexpected SMTP input at connect time (before writing
2282 the banner), Exim was not dealing correctly with a non-positive return
2283 from the read() function. If the client had disconnected by this time,
2284 the result was a log entry for a synchronization error with an empty
2285 string after "input=" when read() returned zero. If read() returned -1
2286 (an event I could not check), uninitialized data bytes were printed.
2287 There were reports of junk text (parts of files, etc) appearing after
2290 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2292 PH/22 Added support for macro redefinition, and (re)definition in between
2293 driver and ACL definitions.
2295 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2296 forgetting to use the resulting value; it was using the unexpanded value.
2298 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2299 hadn't been configured. The fix is from Juergen Kreileder, who
2300 understands it better than I do:
2302 "Here's what I see happening with three configured cyrus_sasl
2303 authenticators configured (plain, login, cram-md5):
2305 On startup auth_cyrus_sasl_init() gets called for each of these.
2306 This means three calls to sasl_listmech() without a specified mech_list.
2307 => SASL tests which mechs of all available mechs actually work
2308 => three warnings about OTP not working
2309 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2311 With the patch, sasl_listmech() also gets called three times. But now
2312 SASL's mech_list option is set to the server_mech specified in the the
2313 authenticator. Or in other words, the answer from sasl_listmech()
2314 gets limited to just the mech you're testing for (which is different
2316 => the return list contains just 'plain' or 'login', 'cram-md5' or
2317 nothing depending on the value of ob->server_mech.
2319 I've just tested the patch: Authentication still works fine,
2320 unavailable mechs specified in the exim configuration are still
2321 caught, and the auth.log warnings about OTP are gone."
2323 PH/25 When debugging is enabled, the contents of the command line are added
2324 to the debugging output, even when log_selector=+arguments is not
2327 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2328 answer is "GNU", and only if the return is "GNU/something" is the answer
2331 PH/27 $acl_verify_message is now set immediately after the failure of a
2332 verification in an ACL, and so is available in subsequent modifiers. In
2333 particular, the message can be preserved by coding like this:
2335 warn !verify = sender
2336 set acl_m0 = $acl_verify_message
2338 Previously, $acl_verify_message was set only while expanding "message"
2339 and "log_message" when a very denied access.
2341 PH/28 Modified OS/os.c-Linux with
2343 -#ifndef OS_LOAD_AVERAGE
2344 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2346 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2347 nomenclature these days.)
2349 PH/29 Installed patch from the Sieve maintainer that adds the options
2350 sieve_useraddress and sieve_subaddress to the redirect router.
2352 PH/30 In these circumstances:
2353 . Two addresses routed to the same list of hosts;
2354 . First host does not offer TLS;
2355 . First host accepts first address;
2356 . First host gives temporary error to second address;
2357 . Second host offers TLS and a TLS session is established;
2358 . Second host accepts second address.
2359 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2360 and peerdn, if requested) that were in fact used only for the second
2363 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2364 attention to any local part prefix or suffix that was matched by the
2365 router that accepted the address. It now behaves in the same way as it
2366 does for delivery: the affixes are removed from the local part unless
2367 rcpt_include_affixes is set on the transport.
2369 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2370 timeout during the DATA phase of an incoming message.
2372 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2373 applied a patch sanctioned by the Sieve maintainer.
2375 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2376 the uid or gid is negative. A case of a negative gid caused this to be
2377 noticed. The fix allows for either to be negative.
2379 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2380 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2383 PH/36 The change PH/12 above was broken. Fixed it.
2385 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2386 the grounds that routing the same address twice would always produce the
2387 same answer. This might have been true once, but it is certainly no
2388 longer true now. Routing a child address may depend on the previous
2389 routing that produced that child. Some complicated redirection strategies
2390 went wrong when messages had multiple recipients, and made Exim's
2391 behaviour dependent on the order in which the addresses were given.
2393 I have moved the duplicate checking until after the routing is complete.
2394 Exim scans the addresses that are assigned to local and remote
2395 transports, and removes any duplicates. This means that more work will be
2396 done, as duplicates will always all be routed, but duplicates are
2397 presumably rare, so I don't expect this is of any significance.
2399 For deliveries to pipes, files, and autoreplies, the duplicate checking
2400 still happens during the routing process, since they are not going to be
2403 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2404 It corrects a timeout issue with spamd. This is Ian's comment: "The
2405 background is that sometimes spamd either never reads data from a
2406 connection it has accepted, or it never writes response data. The exiscan
2407 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2408 blindly assumes that writes won't block so it may never time out."
2410 PH/39 Allow G after quota size as well as K and M.
2412 PH/40 The value set for $authenticated_id in an authenticator may not contain
2413 binary zeroes or newlines because the value is written to log lines and
2414 to spool files. There was no check on this. Now the value is run through
2415 the string_printing() function so that such characters are converted to
2416 printable escape sequences.
2418 PH/41 $message_linecount is a new variable that contains the total number of
2419 lines in the message. Compare $body_linecount, which is the count for the
2422 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2423 bounce and delay warning messages, except in certain special cases, which
2426 (a) An SMTP error message from a remote host;
2427 (b) A message specified in a :fail: redirection;
2428 (c) A message specified in a "fail" command in a system filter;
2429 (d) A message specified in a FAIL return from the queryprogram router;
2430 (e) A message specified by the cannot_route_message router option.
2432 In these cases only, Exim does include the error details in bounce and
2433 warning messages. There are also a few cases where bland messages such
2434 as "unrouteable address" or "local delivery error" are given.
2436 PH/43 $value is now also set for the "else" part of a ${run expansion.
2438 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2439 being worked on, but at least Exim now implements the latest version to
2442 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2443 process to complete was treated as a delivery failure, a timeout while
2444 writing the message to the pipe was logged, but erroneously treated as a
2445 successful delivery. Such timeouts include transport filter timeouts. For
2446 consistency with the overall process timeout, these timeouts are now
2447 treated as errors, giving rise to delivery failures by default. However,
2448 there is now a new Boolean option for the pipe transport called
2449 timeout_defer, which, if set TRUE, converts the failures into defers for
2450 both kinds of timeout. A transport filter timeout is now identified in
2453 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2454 systems where "make" and "gmake" are different, calling "gmake" at top
2455 level broke things. I've arranged for the value of $(MAKE) to be passed
2456 from the Makefile to this script so that it can call the same version of
2460 A note about Exim versions 4.44 and 4.50
2461 ----------------------------------------
2463 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2464 changes of various kinds. As a consequence, a big documentation update was
2465 needed. This delayed the release for rather longer than seemed good, especially
2466 in the light of a couple of (minor) security issues. Therefore, the changes
2467 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2468 release. So 4.44 and 4.50 are in effect two different branches that both start
2471 I have left the 4.50 change log unchanged; it contains all the changes since
2472 4.43. The change log for 4.44 is below; many of its items are identical to
2473 those for 4.50. This seems to be the most sensible way to preserve the
2474 historical information.
2480 1. Minor wording change to the doc/README.SIEVE file.
2482 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2483 computation of the current number of files was incorrect.
2485 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2486 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2489 4. Give more explanation in the error message when the command for a transport
2490 filter fails to execute.
2492 5. There are several places where Exim runs a non-Exim command in a
2493 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2494 was being done only for the command run by the queryprogram router. It is
2495 now done for all such subprocesses. The other cases are: ${run, transport
2496 filters, and the commands run by the lmtp and pipe transports.
2498 6. Added CONFIGURE_GROUP build-time option.
2500 7. Some older OS have a limit of 256 on the maximum number of file
2501 descriptors. Exim was using setrlimit() to set 1000 as a large value
2502 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2503 systems. I've change it so that if it can't get 1000, it tries for 256.
2505 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2506 was an oversight, and furthermore, ever since the addition of extra
2507 controls (e.g. 4.43/32), the checks on when to allow different forms of
2508 "control" were broken. There should now be diagnostics for all cases when a
2509 control that does not make sense is encountered.
2511 9. Added the /retain_sender option to "control=submission".
2513 10. $recipients is now available in the predata ACL (oversight).
2515 11. Tidy the search cache before the fork to do a delivery from a message
2516 received from the command line. Otherwise the child will trigger a lookup
2517 failure and thereby defer the delivery if it tries to use (for example) a
2518 cached ldap connection that the parent has called unbind on.
2520 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2521 of $address_data from the recipient verification was clobbered by the
2522 sender verification.
2524 13. The value of address_data from a sender verification is now available in
2525 $sender_address_data in subsequent conditions in the ACL statement.
2527 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2529 15. Added a new option "connect=<time>" to callout options, to set a different
2532 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2533 was its contents. (It was OK if the option was not defined at all.)
2535 17. A "Completed" log line is now written for messages that are removed from
2536 the spool by the -Mrm option.
2538 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2539 information about exactly what failed.
2541 19. Added -dd to debug only the daemon process.
2543 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2544 handles timeouts, both on the server side and network timeouts. Renamed the
2545 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2547 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2548 It is now set to "smtps".
2550 22. $host_address is now set to the target address during the checking of
2551 ignore_target_hosts.
2553 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2554 being passed; this would have caused $sender_host_name to have been used if
2555 matching the list had actually called for a host name (not very likely,
2556 since this list is usually IP addresses). A host name is now passed as
2559 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2560 code that specifies a non-restarting handler (typically sigaction() in
2561 modern systems) in an attempt to fix a rare and obscure crash bug.
2563 25. Narrowed the window for a race in the daemon that could cause it to ignore
2564 SIGCHLD signals. This is not a major problem, because they are used only to
2565 wake it up if nothing else does.
2567 26. A malformed maildirsize file could cause Exim to calculate negative values
2568 for the mailbox size or file count. Odd effects could occur as a result.
2569 The maildirsize information is now recalculated if the size or filecount
2572 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2573 support for a long time. Removed HAVE_SYS_VFS_H.
2575 28. Installed the latest version of exipick from John Jetmore.
2577 29. In an address list, if the pattern was not a regular expression, an empty
2578 subject address (from a bounce message) matched only if the pattern was an
2579 empty string. Non-empty patterns were not even tested. This was the wrong
2580 because it is perfectly reasonable to use an empty address as part of a
2581 database query. An empty address is now tested by patterns that are
2582 lookups. However, all the other forms of pattern expect the subject to
2583 contain a local part and a domain, and therefore, for them, an empty
2584 address still always fails if the pattern is not itself empty.
2586 30. Exim went into a mad DNS loop when attempting to do a callout where the
2587 host was specified on an smtp transport, and looking it up yielded more
2588 than one IP address.
2590 31. Re-factored the code for checking spool and log partition space into a
2591 function that finds that data and another that does the check. The former
2592 is then used to implement four new variables: $spool_space, $log_space,
2593 $spool_inodes, and $log_inodes.
2595 32. The RFC2047 encoding function was originally intended for short strings
2596 such as real names; it was not keeping to the 75-character limit for
2597 encoded words that the RFC imposes. It now respects the limit, and
2598 generates multiple encoded words if necessary. To be on the safe side, I
2599 have increased the buffer size for the ${rfc2047: expansion operator from
2602 33. It is now permitted to omit both strings after an "if" condition; if the
2603 condition is true, the result is "true". As before, when the second string
2604 is omitted, a false condition yields an empty string. This makes it less
2605 cumbersome to write custom ACL and router conditions.
2607 34. Failure to deliver a bounce message always caused it to be frozen, even if
2608 there was an errors_to setting on the router. The errors_to setting is now
2611 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2612 canonical form (fully expanded) before being placed in
2613 $sender_host_address.
2615 36. The table in the code that translates DNS record types into text (T_A to
2616 "A" for instance) was missing entries for NS and CNAME. It is just possible
2617 that this could have caused confusion if both these types were looked up
2618 for the same domain, because the text type is used as part of Exim's
2619 per-process caching. But the chance of anyone hitting this buglet seems
2622 37. The dnsdb lookup has been extended in a number of ways.
2624 (1) There is a new type, "zns", which walks up the domain tree until it
2625 finds some nameserver records. It should be used with care.
2627 (2) There is a new type, "mxh", which is like "mx" except that it returns
2628 just the host names, not the priorities.
2630 (3) It is now possible to give a list of domains (or IP addresses) to be
2631 looked up. The behaviour when one of the lookups defers can be
2632 controlled by a keyword.
2634 (4) It is now possible to specify the separator character for use when
2635 multiple records are returned.
2637 38. The dnslists ACL condition has been extended: it is now possible to supply
2638 a list of IP addresses and/or domains to be looked up in a particular DNS
2641 39. Added log_selector=+queue_time_overall.
2643 40. When running the queue in the test harness, wait just a tad after forking a
2644 delivery process, to get repeatability of debugging output.
2646 41. Include certificate and key file names in error message when GnuTLS fails
2647 to set them up, because the GnuTLS error message doesn't include the name
2648 of the failing file when there is a problem reading it.
2650 42. Allow both -bf and -bF in the same test run.
2652 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2654 44. The "Exiscan patch" is now merged into the mainline Exim source.
2656 45. Sometimes the final signoff response after QUIT could fail to get
2657 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2658 < 0 before doing a fflush(). This bug looks as though it goes back to the
2659 introduction of TLS in release 3.20, but "sometimes" must have been rare
2660 because the tests only now provoked it.
2662 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2663 (this can affect the format of dates).
2665 47. exim_tidydb, when checking for the continued existence of a message for
2666 which it has found a message-specific retry record, was not finding
2667 messages that were in split spool directories. Consequently, it was
2668 deleting retry records that should have stayed in existence.
2670 48. Steve fixed some bugs in eximstats.
2672 49. The SPA authentication driver was not abandoning authentication and moving
2673 on to the next authenticator when an expansion was forced to fail,
2674 contradicting the general specification for all authenticators. Instead it
2675 was generating a temporary error. It now behaves as specified.
2677 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2678 (the order specifies the preference for clients). The order is now AES256,
2679 AES128, 3DES, ARCFOUR128.
2681 51. Small patch to Sieve code - explicitly set From: when generating an
2684 52. Exim crashed if a remote delivery caused a very long error message to be
2685 recorded - for instance if somebody sent an entire SpamAssassin report back
2686 as a large number of 550 error lines. This bug was coincidentally fixed by
2687 increasing the size of one of Exim's internal buffers (big_buffer) that
2688 happened as part of the Exiscan merge. However, to be on the safe side, I
2689 have made the code more robust (and fixed the comments that describe what
2692 53. Now that there can be additional text after "Completed" in log lines (if
2693 the queue_time_overall log selector is set), a one-byte patch to exigrep
2694 was needed to allow it to recognize "Completed" as not the last thing in
2697 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2698 patch that reportedly fixes this has been added. I am not expert enough to
2699 create a test for it. This is what the patch creator wrote:
2701 "I found a little strange behaviour of ldap code when working with
2702 Windows 2003 AD Domain, where users was placed in more than one
2703 Organization Units. When I tried to give exim partial DN, the exit code
2704 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2705 But simultaneously result of request was absolutely normal ldap result,
2706 so I produce this patch..."
2708 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2709 REFERENCE, so I have modified the code to exclude the patch when that macro
2712 55. Some experimental protocols are using DNS PTR records for new purposes. The
2713 keys for these records are domain names, not reversed IP addresses. The
2714 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2715 leaves it alone. Component reversal etc. now happens only for IP addresses.
2718 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2720 57. Double the size of the debug message buffer (to 2048) so that more of very
2721 long debug lines gets shown.
2723 58. The exicyclog utility now does better if the number of log files to keep
2724 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2726 59. Two changes related to the smtp_active_hostname option:
2728 (1) $smtp_active_hostname is now available as a variable.
2729 (2) The default for smtp_banner uses $smtp_active_hostname instead
2730 of $primary_hostname.
2732 60. The host_aton() function is supposed to be passed a string that is known
2733 to be a valid IP address. However, in the case of IPv6 addresses, it was
2734 not checking this. This is a hostage to fortune. Exim now panics and dies
2735 if the condition is not met. A case was found where this could be provoked
2736 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2737 components; fortuitously, this particular loophole had already been fixed
2738 by change 4.50/55 above.
2740 If there are any other similar loopholes, the new check in host_aton()
2741 itself should stop them being exploited. The report I received stated that
2742 data on the command line could provoke the exploit when Exim was running as
2743 exim, but did not say which command line option was involved. All I could
2744 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2745 running as the user.
2748 61. There was a buffer overflow vulnerability in the SPA authentication code
2749 (which came originally from the Samba project). I have added a test to the
2750 spa_base64_to_bits() function which I hope fixes it.
2753 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2754 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2756 63. The daemon start-up calls getloadavg() while still root for those OS that
2757 need the first call to be done as root, but it missed one case: when
2758 deliver_queue_load_max is set with deliver_drop_privilege. This is
2759 necessary for the benefit of the queue runner, because there is no re-exec
2760 when deliver_drop_privilege is set.
2762 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2763 This has been fixed.
2765 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2766 was in use, was not putting the data itself into the right store pool;
2767 consequently, it could be overwritten for a subsequent message in the same
2768 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2771 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2773 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2774 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2775 the function were treating the return as a boolean value, which happened to
2776 work because 0=false and not-0=true, but is not correct code.
2778 68. The host_aton() function was not handling scoped IPv6 addresses (those
2779 with, for example, "%eth0" on the end) correctly.
2781 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2782 negated items (that is, ~something) in unsigned ints. Some compilers
2783 apparently mutter when there is no cast.
2785 70. If an address verification called from an ACL failed, and did not produce a
2786 user-specific message (i.e. there was only a "system" message), nothing was
2787 put in $acl_verify_message. In this situation, it now puts the system
2790 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2791 session; change 4.31/43 added the unwanted input to the log line - except
2792 that it did not do this in the start of session case. It now does.
2794 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2795 This is wrong and can cause the other end to generate a synchronization
2796 error if it is another Exim or anything else that does the synchronization
2797 check. A QUIT command is no longer sent after a timeout.
2799 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2800 during host lookups.
2802 74. The defer_ok option of callout verification was not working if it was used
2803 when verifying addresses in header lines, that is, for this case:
2805 verify = header_sender/callout=defer_ok
2807 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2808 those file descriptors could be used for SMTP connections. If anything
2809 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2810 could be sent to the SMTP client, causing chaos. The daemon now opens
2811 stdin, stdout, and stderr to /dev/null when it puts itself into the
2814 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2815 log by default. The user can override this with suitable Perl magic.
2817 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2818 the log message when discard triggers, was not working for the DATA ACL or
2819 for the non-SMTP ACL.
2821 78. Error message wording change in sieve.c.
2823 79. If smtp_accept_max_per_host was set, the number of connections could be
2824 restricted to fewer than expected, because the daemon was trying to set up
2825 a new connection before checking whether the processes handling previous
2826 connections had finished. The check for completed processes is now done
2827 earlier. On busy systems, this bug wouldn't be noticed because something
2828 else would have woken the daemon, and it would have reaped the completed
2831 80. If a message was submitted locally by a user whose login name contained one
2832 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2833 It caused a spool format error. I have fixed the spool reading code. A
2834 related problem was that the "from" clause in the Received: line became
2835 illegal because of the space(s). It is now covered by ${quote_local_part.
2837 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2840 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2842 83. Patch from Sieve maintainer to fix unterminated string problem in
2843 "vacation" handling.
2845 84. Some minor changes to the Linux configuration files to help with other
2846 OS variants using glibc.
2848 85. One more patch for Sieve to update vacation handling to latest spec.
2851 ----------------------------------------------------
2852 See the note above about the 4.44 and 4.50 releases.
2853 ----------------------------------------------------
2859 1. Change 4.43/35 introduced a bug that caused file counts to be
2860 incorrectly computed when quota_filecount was set in an appendfile
2863 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2864 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2867 3. Give more explanation in the error message when the command for a transport
2868 filter fails to execute.
2870 4. There are several places where Exim runs a non-Exim command in a
2871 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2872 was being done only for the command run by the queryprogram router. It is
2873 now done for all such subprocesses. The other cases are: ${run, transport
2874 filters, and the commands run by the lmtp and pipe transports.
2876 5. Some older OS have a limit of 256 on the maximum number of file
2877 descriptors. Exim was using setrlimit() to set 1000 as a large value
2878 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2879 systems. I've change it so that if it can't get 1000, it tries for 256.
2881 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2882 was an oversight, and furthermore, ever since the addition of extra
2883 controls (e.g. 4.43/32), the checks on when to allow different forms of
2884 "control" were broken. There should now be diagnostics for all cases when a
2885 control that does not make sense is encountered.
2887 7. $recipients is now available in the predata ACL (oversight).
2889 8. Tidy the search cache before the fork to do a delivery from a message
2890 received from the command line. Otherwise the child will trigger a lookup
2891 failure and thereby defer the delivery if it tries to use (for example) a
2892 cached ldap connection that the parent has called unbind on.
2894 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2895 of $address_data from the recipient verification was clobbered by the
2896 sender verification.
2898 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2899 was its contents. (It was OK if the option was not defined at all.)
2901 11. A "Completed" log line is now written for messages that are removed from
2902 the spool by the -Mrm option.
2904 12. $host_address is now set to the target address during the checking of
2905 ignore_target_hosts.
2907 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2908 being passed; this would have caused $sender_host_name to have been used if
2909 matching the list had actually called for a host name (not very likely,
2910 since this list is usually IP addresses). A host name is now passed as
2913 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2914 code that specifies a non-restarting handler (typically sigaction() in
2915 modern systems) in an attempt to fix a rare and obscure crash bug.
2917 15. Narrowed the window for a race in the daemon that could cause it to ignore
2918 SIGCHLD signals. This is not a major problem, because they are used only to
2919 wake it up if nothing else does.
2921 16. A malformed maildirsize file could cause Exim to calculate negative values
2922 for the mailbox size or file count. Odd effects could occur as a result.
2923 The maildirsize information is now recalculated if the size or filecount
2926 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2927 support for a long time. Removed HAVE_SYS_VFS_H.
2929 18. Updated exipick to current release from John Jetmore.
2931 19. Allow an empty sender to be matched against a lookup in an address list.
2932 Previously the only cases considered were a regular expression, or an
2935 20. Exim went into a mad DNS lookup loop when doing a callout where the
2936 host was specified on the transport, if the DNS lookup yielded more than
2939 21. The RFC2047 encoding function was originally intended for short strings
2940 such as real names; it was not keeping to the 75-character limit for
2941 encoded words that the RFC imposes. It now respects the limit, and
2942 generates multiple encoded words if necessary. To be on the safe side, I
2943 have increased the buffer size for the ${rfc2047: expansion operator from
2946 22. Failure to deliver a bounce message always caused it to be frozen, even if
2947 there was an errors_to setting on the router. The errors_to setting is now
2950 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2951 canonical form (fully expanded) before being placed in
2952 $sender_host_address.
2954 24. Updated eximstats to version 1.33
2956 25. Include certificate and key file names in error message when GnuTLS fails
2957 to set them up, because the GnuTLS error message doesn't include the name
2958 of the failing file when there is a problem reading it.
2960 26. Expand error message when OpenSSL has problems setting up cert/key files.
2963 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2964 (this can affect the format of dates).
2966 28. exim_tidydb, when checking for the continued existence of a message for
2967 which it has found a message-specific retry record, was not finding
2968 messages that were in split spool directories. Consequently, it was
2969 deleting retry records that should have stayed in existence.
2971 29. eximstats updated to version 1.35
2972 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2973 1.35 - bugfix such that pie charts by volume are generated correctly
2975 30. The SPA authentication driver was not abandoning authentication and moving
2976 on to the next authenticator when an expansion was forced to fail,
2977 contradicting the general specification for all authenticators. Instead it
2978 was generating a temporary error. It now behaves as specified.
2980 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2981 (the order specifies the preference for clients). The order is now AES256,
2982 AES128, 3DES, ARCFOUR128.
2984 31. Small patch to Sieve code - explicitly set From: when generating an
2987 32. Exim crashed if a remote delivery caused a very long error message to be
2988 recorded - for instance if somebody sent an entire SpamAssassin report back
2989 as a large number of 550 error lines. This bug was coincidentally fixed by
2990 increasing the size of one of Exim's internal buffers (big_buffer) that
2991 happened as part of the Exiscan merge. However, to be on the safe side, I
2992 have made the code more robust (and fixed the comments that describe what
2995 33. Some experimental protocols are using DNS PTR records for new purposes. The
2996 keys for these records are domain names, not reversed IP addresses. The
2997 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2998 leaves it alone. Component reversal etc. now happens only for IP addresses.
3001 34. The host_aton() function is supposed to be passed a string that is known
3002 to be a valid IP address. However, in the case of IPv6 addresses, it was
3003 not checking this. This is a hostage to fortune. Exim now panics and dies
3004 if the condition is not met. A case was found where this could be provoked
3005 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3006 components; fortuitously, this particular loophole had already been fixed
3007 by change 4.50/55 or 4.44/33 above.
3009 If there are any other similar loopholes, the new check in host_aton()
3010 itself should stop them being exploited. The report I received stated that
3011 data on the command line could provoke the exploit when Exim was running as
3012 exim, but did not say which command line option was involved. All I could
3013 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3014 running as the user.
3017 35. There was a buffer overflow vulnerability in the SPA authentication code
3018 (which came originally from the Samba project). I have added a test to the
3019 spa_base64_to_bits() function which I hope fixes it.
3022 36. The daemon start-up calls getloadavg() while still root for those OS that
3023 need the first call to be done as root, but it missed one case: when
3024 deliver_queue_load_max is set with deliver_drop_privilege. This is
3025 necessary for the benefit of the queue runner, because there is no re-exec
3026 when deliver_drop_privilege is set.
3028 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3029 was in use, was not putting the data itself into the right store pool;
3030 consequently, it could be overwritten for a subsequent message in the same
3031 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3034 38. Sometimes the final signoff response after QUIT could fail to get
3035 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3036 < 0 before doing a fflush(). This bug looks as though it goes back to the
3037 introduction of TLS in release 3.20, but "sometimes" must have been rare
3038 because the tests only now provoked it.
3044 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3045 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3046 Now it returns an integer. A number of calls were still expecting a T/F
3047 return. Fortuitously, in all cases, the tests worked in OK situations,
3048 which is the norm. However, things would have gone wrong on any write
3049 failures on the smtp file descriptor. This function is used when sending
3050 messages over SMTP and also when doing verify callouts.
3052 2. When Exim is called to do synchronous delivery of a locally submitted
3053 message (the -odf or -odi options), it no longer closes stderr before doing
3056 3. Implemented the mua_wrapper option.
3058 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3060 5. Implemented the functions header_remove(), header_testname(),
3061 header_add_at_position(), and receive_remove_recipient(), and exported them
3064 6. If an ACL "warn" statement specified the addition of headers, Exim already
3065 inserted X-ACL-Warn: at the start if there was no header name. However, it
3066 was not making this test for the second and subsequent header lines if
3067 there were newlines in the string. This meant that an invalid header could
3068 be inserted if Exim was badly configured.
3070 7. Allow an ACL "warn" statement to add header lines at the start or after all
3071 the Received: headers, as well as at the end.
3073 8. Added the rcpt_4xx retry error code.
3075 9. Added postmaster_mailfrom=xxx to callout verification option.
3077 10. Added mailfrom=xxxx to the callout verification option, for verify=
3080 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3081 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3083 12. Inserted some casts to stop certain compilers warning when using pointer
3084 differences as field lengths or precisions in printf-type calls (mostly
3085 affecting debugging statements).
3087 13. Added optional readline() support for -be (dynamically loaded).
3089 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3090 same clock tick as a message's arrival, so that its received time was the
3091 same as the "first fail" time on the retry record, and that message
3092 remained on the queue past the ultimate address timeout, every queue runner
3093 would try a delivery (because it was past the ultimate address timeout) but
3094 after another failure, the ultimate address timeout, which should have then
3095 bounced the address, did not kick in. This was a "< instead of <=" error;
3096 in most cases the first failure would have been in the next clock tick
3097 after the received time, and all would be well.
3099 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3100 being recognized when the domain list was tested by the match_domain
3101 condition in an expansion string.
3103 16. Added the ${str2b64: operator.
3105 17. Exim was always calling setrlimit() to set a large limit for the number of
3106 processes, without checking whether the existing limit was already
3107 adequate. (It did check for the limit on file descriptors.) Furthermore,
3108 errors from getrlimit() and setrlimit() were being ignored. Now they are
3109 logged to the main and panic logs, but Exim does carry on, to try to do its
3110 job under whatever limits there are.
3112 18. Imported PCRE 5.0.
3114 19. Trivial typo in log message " temporarily refused connection" (the leading
3117 20. If the log selector return_path_on_delivery was set and an address was
3118 redirected to /dev/null, the delivery process crashed because it assumed
3119 that a return path would always be set for a "successful" delivery. In this
3120 case, the whole delivery is bypassed as an optimization, and therefore no
3123 21. Internal re-arrangement: the function for sending a challenge and reading
3124 a response while authentication was assuming a zero-terminated challenge
3125 string. It's now changed to take a pointer and a length, to allow for
3126 binary data in such strings.
3128 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3130 23. Exim was not respecting finduser_retries when seeking the login of the
3131 uid under which it was called; it was always trying 10 times. (The default
3132 setting of finduser_retries is zero.) Also, it was sleeping after the final
3133 failure, which is pointless.
3135 24. Implemented tls_on_connect_ports.
3137 25. Implemented acl_smtp_predata.
3139 26. If the domain in control=submission is set empty, Exim assumes that the
3140 authenticated id is a complete email address when it generates From: or
3141 Sender: header lines.
3143 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3144 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3145 chown and chgrp in /bin and hostname in /usr/bin.
3147 28. Exim was keeping the "process log" file open after each use, just as it
3148 does for the main log. This opens the possibility of it remaining open for
3149 long periods when the USR1 signal hits a daemon. Occasional processlog
3150 errors were reported, that could have been caused by this. Anyway, it seems
3151 much more sensible not to leave this file open at all, so that is what now
3154 29. The long-running daemon process does not normally write to the log once it
3155 has entered its main loop, and it closes the log before doing so. This is
3156 so that log files can straightforwardly be renamed and moved. However,
3157 there are a couple of unusual error situations where the daemon does write
3158 log entries, and I had neglected to close the log afterwards.
3160 30. The text of an SMTP error response that was received during a remote
3161 delivery was being truncated at 512 bytes. This is too short for some of
3162 the long messages that one sometimes sees. I've increased the limit to
3165 31. It is now possible to make retry rules that apply only when a message has a
3166 specific sender, in particular, an empty sender.
3168 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3169 it possible to be selective about when SMTP synchronization is enforced.
3171 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3173 32. Implemented hosts_connection_nolog.
3175 33. Added an ACL for QUIT.
3177 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3180 35. Added mailbox_size and mailbox_filecount to appendfile.
3182 36. Added control = no_multiline_responses to ACLs.
3184 37. There was a bug in the logic of the code that waits for the clock to tick
3185 in the case where the clock went backwards by a substantial amount such
3186 that the microsecond fraction of "now" was more than the microsecond
3187 fraction of "then" (but the whole seconds number was less).
3189 38. Added support for the libradius Radius client library this is found on
3190 FreeBSD (previously only the radiusclient library was supported).
3196 1. When certain lookups returned multiple values in the form name=value, the
3197 quoting of the values was not always being done properly. Specifically:
3198 (a) If the value started with a double quote, but contained no whitespace,
3200 (b) If the value contained whitespace other than a space character (i.e.
3201 tabs or newlines or carriage returns) it was not quoted.
3202 This fix has been applied to the mysql and pgsql lookups by writing a
3203 separate quoting function and calling it from the lookup code. The fix
3204 should probably also be applied to nisplus, ibase and oracle lookups, but
3205 since I cannot test any of those, I have not disturbed their existing code.
3207 2. A hit in the callout cache for a specific address caused a log line with no
3208 reason for rejecting RCPT. Now it says "Previous (cached) callout
3209 verification failure".
3211 3. There was an off-by-one bug in the queryprogram router. An over-long
3212 return line was truncated at 256 instead of 255 characters, thereby
3213 overflowing its buffer with the terminating zero. As well as fixing this, I
3214 have increased the buffer size to 1024 (and made a note to document this).
3216 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3217 when Exim is waiting for an SMTP response from a remote server, Exim
3218 restarts its select() call on the socket, thereby resetting its timeout.
3219 This is not a problem when such interrupts are rare. Somebody set up a cron
3220 job to run exiwhat every 2 minutes, which is less than the normal select()
3221 timeout (5 or 10 minutes). This meant that the select() timeout never
3222 kicked in because it was always reset. I have fixed this by comparing the
3223 time when an interrupt arrives with the time at the start of the first call
3224 to select(). If more time than the timeout has elapsed, the interrupt is
3225 treated as a timeout.
3227 5. Some internal re-factoring in preparation for the addition of Sieve
3228 extensions (by MH). In particular, the "personal" test is moved to a
3229 separate function, and given an option for scanning Cc: and Bcc: (which is
3230 not set for Exim filters).
3232 6. When Exim created an email address using the login of the caller as the
3233 local part (e.g. when creating a From: or Sender: header line), it was not
3234 quoting the local part when it contained special characters such as @.
3236 7. Installed new OpenBSD configuration files.
3238 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3239 try to make them clearer.
3241 9. Callout options, other than the timeout value, were being ignored when
3242 verifying sender addresses in header lines. For example, when using
3244 verify = header_sender/callout=no_cache
3246 the cache was (incorrectly) being used.
3248 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3249 only the Cygwin environment.
3251 11. When return_path_on_delivery was set as a log selector, if different remote
3252 addresses in the same message used different return paths and parallel
3253 remote delivery occurred, the wrong values would sometimes be logged.
3254 (Whenever a remote delivery process finished, the return path value from
3255 the most recently started remote delivery process was logged.)
3257 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3258 lines when AUTH and/or TLS are in use. This is the "received protocol"
3259 field. Exim used to use "asmtp" for authenticated SMTP, without any
3260 indication (in the protocol name) for TLS use. Now it follows the RFC and
3261 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3262 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3263 names appear in log lines as well as in Received: header lines.
3265 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3266 extensions, and comparison tests, and to fix some bugs.
3268 14. Changes to the "personal" filter test:
3270 (1) The test was buggy in that it was just doing the equivalent of
3271 "contains" tests on header lines. For example, if a user's address was
3272 anne@some.where, the "personal" test would incorrectly be true for
3274 To: susanne@some.where
3276 This test is now done by extracting each address from the header in turn,
3277 and checking the entire address. Other tests that are part of "personal"
3278 are now done using regular expressions (for example, to check local parts
3279 of addresses in From: header lines).
3281 (2) The list of non-personal local parts in From: addresses has been
3282 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3283 taken from the Sieve specification recommendations.
3285 (3) If the message contains any header line starting with "List-" it is
3286 treated as non-personal.
3288 (4) The test for "circular" in the Subject: header line has been removed
3289 because it now seems ill-conceived.
3291 15. Minor typos in src/EDITME comments corrected.
3293 16. Installed latest exipick from John Jetmore.
3295 17. If headers_add on a router specified a text string that was too long for
3296 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3297 of string_sprintf() is now avoided.
3299 18. $message_body_size was not set (it was always zero) when running the DATA
3300 ACL and the local_scan() function.
3302 19. For the "mail" command in an Exim filter, no default was being set for
3303 the once_repeat time, causing a random time value to be used if "once" was
3304 specified. (If the value happened to be <= 0, no repeat happened.) The
3305 default is now 0s, meaning "never repeat". The "vacation" command was OK
3306 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3307 (I found it when inspecting the code).
3309 20. There is now an overall timeout for performing a callout verification. It
3310 defaults to 4 times the callout timeout, which applies to individual SMTP
3311 commands during the callout. The overall timeout applies when there is more
3312 than one host that can be tried. The timeout is checked before trying the
3313 next host. This prevents very long delays if there are a large number of
3314 hosts and all are timing out (e.g. when the network connections are timing
3315 out). The value of the overall timeout can be changed by specifying an
3316 additional sub-option for "callout", called "maxwait". For example:
3318 verify = sender/callout=5s,maxwait=20s
3320 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3321 to the end before writing, but this should make it even safer).
3323 22. Exim was forgetting that it had advertised PIPELINING for the second and
3324 subsequent messages on an SMTP connection. It was also not resetting its
3325 memory on STARTTLS and an internal HELO.
3327 23. When Exim logs an SMTP synchronization error within a session, it now
3328 records whether PIPELINING has been advertised or not.
3330 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3331 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3332 rather than long int.
3334 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3336 26. Added the never_mail option to autoreply.
3342 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3343 crash if the getsockname() call failed; this can happen if a connection is
3344 closed very soon after it is established. The problem was simply in the
3345 order in which certain operations were done, causing Exim to try to write
3346 to the SMTP stream before it had set up the file descriptor. The bug has
3347 been fixed by making things happen in the correct order.
3353 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3354 before the connection was closed, thus losing the rejection response.
3356 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3357 some early Solaris releases, but causes trouble in current releases where
3358 socklen_t is defined.
3360 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3363 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3366 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3367 that releasing the top of it at the end releases what was used for sub-
3368 expansions (unless the block got too big). However, discard this block if
3369 the first thing is a variable or header, so that we can use its block when
3370 it is dynamic (useful for very large $message_headers, for example).
3372 6. Lookups now cache *every* query, not just the most recent. A new, separate
3373 store pool is used for this. It can be recovered when all lookup caches are
3374 flushed. Lookups now release memory at the end of their result strings.
3375 This has involved some general refactoring of the lookup sources.
3377 7. Some code has been added to the store_xxx() functions to reduce the amount
3378 of flapping under certain conditions.
3380 8. log_incoming_interface used to affect only the <= reception log lines. Now
3381 it causes the local interface and port to be added to several more SMTP log
3382 lines, for example "SMTP connection from", and rejection lines.
3384 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3386 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3388 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3389 could be overwritten at the end of the current message (or the start of a
3390 new message if it was set in a HELO ACL). The value is now preserved for
3391 the duration of the SMTP connection.
3393 12. If a transport had a headers_rewrite setting, and a matching header line
3394 contained an unqualified address, that address was qualified, even if it
3395 did not match any rewriting rules. The underlying bug was that the values
3396 of the flags that permit the existence of unqualified sender and recipient
3397 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3398 non-local messages, and by -bnq for local messages) were not being
3399 preserved with the message after it was received.
3401 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3402 "next input=" as part of the text comprising the host identity instead of
3403 the correct text. The code was using the same buffer for two different
3404 strings. However, depending on which order the printing function evaluated
3405 its arguments, the bug did not always show up. Under Linux, for example, my
3406 test suite worked just fine.
3408 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3409 doesn't work with some older versions of Perl. It has been changed to "my",
3410 which in any case is probably the better facility to use.
3412 15. A really picky compiler found some instances of statements for creating
3413 error messages that either had too many or two few arguments for the format
3416 16. The size of the buffer for calls to the DNS resolver has been increased
3417 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3418 for addresses that have a lot of PTR records. This alleviates a problem; it
3419 does not fully solve it.
3421 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3422 buffer now truncates the list and logs the incident, which is the same
3423 action as happens when Exim is looking up a host name and its aliases.
3424 Previously in this situation something unpredictable would happen;
3425 sometimes it was "internal error: store_reset failed".
3427 18. If a server dropped the connection unexpectedly when an Exim client was
3428 using GnuTLS and trying to read a response, the client delivery process
3429 crashed while trying to generate an error log message.
3431 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3432 string, for example:
3434 warn message = H1: something\nH2: something
3436 the text was added as a single header line from Exim's point of view
3437 though it ended up OK in the delivered message. However, searching for the
3438 second and subsequent header lines using $h_h2: did not work. This has been
3439 fixed. Similarly, if a system filter added multiple headers in this way,
3440 the routers could not see them.
3442 20. Expanded the error message when iplsearch is called with an invalid key to
3443 suggest using net-iplsearch in a host list.
3445 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3446 ACLs are no longer actually imposed (and a message to that effect is
3449 22. If a "gecos" field in a passwd entry contained escaped characters, in
3450 particular, if it contained a \" sequence, Exim got it wrong when building
3451 a From: or a Sender: header from that name. A second bug also caused
3452 incorrect handling when an unquoted " was present following a character
3453 that needed quoting.
3455 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3456 was not being matched caselessly.
3458 24. Arranged for all hyphens in the exim.8 source to be escaped with
3461 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3462 properly. Recipient callout cache records were still being keyed to include
3463 the sender, even when use_sender was set false. This led to far more
3464 callouts that were necessary. The sender is no longer included in the key
3465 when use_sender is false.
3467 26. Added "control = submission" modifier to ACLs.
3469 27. Added the ${base62d: operator to decode base 62 numbers.
3471 28. dnsdb lookups can now access SRV records.
3473 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3474 the configuration file.
3476 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3477 (-v) mode. This makes the output for a verbose queue run more intelligible.
3479 31. Added a use_postmaster feature to recipient callouts.
3481 32. Added the $body_zerocount variable, containing the number of binary zero
3482 bytes in the message body.
3484 33. The time of last modification of the "new" subdirectory is now used as the
3485 "mailbox time last read" when there is a quota error for a maildir
3488 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3490 35. Added +ignore_unknown as a special item in host lists.
3492 36. Code for decoding IPv6 addresses in host lists is now included, even if
3493 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3494 address was recognized as an IP address, but was then not correctly decoded
3495 into binary, causing unexpected and incorrect effects when compared with
3502 1. Very minor rewording of debugging text in manualroute to say "list of
3503 hosts" instead of "hostlist".
3505 2. If verify=header_syntax was set, and a header line with an unqualified
3506 address (no domain) and a large number of spaces between the end of the
3507 name and the colon was received, the reception process suffered a buffer
3508 overflow, and (when I tested it) crashed. This was caused by some obsolete
3509 code that should have been removed. The fix is to remove it!
3511 3. When running in the test harness, delay a bit after writing a bounce
3512 message to get a bit more predictability in the log output.
3514 4. Added a call to search_tidyup() just before forking a reception process. In
3515 theory, someone could use a lookup in the expansion of smtp_accept_max_
3516 per_host which, without the tidyup, could leave open a database connection.
3518 5. Added the variables $recipient_data and $sender_data which get set from a
3519 lookup success in an ACL "recipients" or "senders" condition, or a router
3520 "senders" option, similar to $domain_data and $local_part_data.
3522 6. Moved the writing of debug_print from before to after the "senders" test
3525 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3526 problems for message scanning, either using a data ACL, or using
3527 local_scan() because the Received: header was not generated till after they
3528 were called (in order to set the time as the time of reception completion).
3529 I have revised the way this works. The header is now generated after the
3530 body is received, but before the ACL or local_scan() are called. After they
3531 are run, the timestamp in the header is updated.
3537 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3538 before starting a queue runner without re-exec. This happened only when
3539 deliver_drop_privilege was set or when the Exim user was set to root. The
3540 effect of the bug was that timeouts during subsequent deliveries caused
3541 crashes instead of being properly handled. The handler is now left at its
3542 default (and expected) setting.
3544 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3545 message, again when deliver_drop_privilege is set or Exim is run as root.
3546 The bug described in (1) was not present in this case, but the tidying up
3547 of the other signals was missing. I have made the two cases consistent.
3549 3. The ignore_target_hosts setting on a manualroute router was being ignored
3550 for hosts that were looked up using the /MX notation.
3552 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3555 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3556 operated on the sender address. After changing the $sender_address to <>
3557 for the sender address verify, Exim was re-instated it as the original
3558 (before rewriting) address, but remembering that it had rewritten it, so it
3559 wasn't rewriting it again. This bug also had the effect of breaking the
3560 sender address verification caching when the sender address was rewritten.
3562 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3563 This has been changed so that if the ip literal address matches
3564 ignore_target_hosts, the router declines.
3566 7. Added expansion conditions match_domain, match_address, and match_local_
3567 part (NOT match_host).
3569 8. The placeholder for the Received: header didn't have a length field set.
3571 9. Added code to Exim itself and to exim_lock to test for a specific race
3572 condition that could lead to file corruption when using MBX delivery. The
3573 issue is with the lockfile that is created in /tmp. If this file is removed
3574 after a process has opened it but before that process has acquired a lock,
3575 there is the potential for a second process to recreate the file and also
3576 acquire a lock. This could lead to two Exim processes writing to the file
3577 at the same time. The added code performs the same test as UW imapd; it
3578 checks after acquiring the lock that its file descriptor still refers to
3579 the same named file.
3581 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3582 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3585 11. Added the smtp_active_hostname option. If used, this will typically be made
3586 to depend on the incoming interface address. Because $interface_address is
3587 not set up until the daemon has forked a reception process, error responses
3588 that can happen earlier (such as "too many connections") no longer contain
3591 12. If an expansion in a condition on a "warn" statement fails because a lookup
3592 defers, the "warn" statement is abandoned, and the next ACL statement is
3593 processed. Previously this caused the whole ACL to be aborted.
3595 13. Added the iplsearch lookup type.
3597 14. Added ident_timeout as a log selector.
3599 15. Added tls_certificate_verified as a log selector.
3601 16. Added a global option tls_require_ciphers (compare the smtp transport
3602 option of the same name). This controls incoming TLS connections.
3604 17. I finally figured out how to make tls_require_ciphers do a similar thing
3605 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3606 before starting the TLS session.
3608 18. Tabs are now shown as \t in -bP output.
3610 19. If the log selector return_path_on_delivery was set, Exim crashed when
3611 bouncing a message because it had too many Received: header lines.
3613 20. If two routers both had headers_remove settings, and the first one included
3614 a superfluous trailing colon, the final name in the first list and the
3615 first name in the second list were incorrectly joined into one item (with a
3616 colon in the middle).
3622 1. Added -C and -D options to the exinext utility, mainly to make it easier
3623 to include in the automated testing, but these could be helpful when
3624 multiple configurations are in use.
3626 2. The exinext utility was not formatting the output nicely when there was
3627 an alternate port involved in the retry record key, nor when there was a
3628 message id as well (for retries that were specific to a specific message
3629 and a specific host). It was also confused by IPv6 addresses, because of
3630 the additional colons they contain. I have fixed the IPv4 problem, and
3631 patched it up to do a reasonable job for IPv6.
3633 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3634 delivery, the log line now contains "pipelined" if PIPELINING was used.
3636 4. An SMTP transport process used to panic and die if the bind() call to set
3637 an explicit outgoing interface failed. This has been changed; it is now
3638 treated in the same way as a connect() failure.
3640 5. A reference to $sender_host_name in the part of a conditional expansion
3641 that was being skipped was still causing a DNS lookup. This no longer
3644 6. The def: expansion condition was not recognizing references to header lines
3645 that used bh_ and bheader_.
3647 7. Added the _cache feature to named lists.
3649 8. The code for checking quota_filecount in the appendfile transport was
3650 allowing one more file than it should have been.
3652 9. For compatibility with Sendmail, the command line option
3660 and sets the incoming protocol and host name (for trusted callers). The
3661 host name and its colon can be omitted when only the protocol is to be set.
3662 Note the Exim already has two private options, -pd and -ps, that refer to
3663 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3664 "s", but I don't think that's a major issue.
3666 10. A number of refactoring changes to the code, none of which should affect
3669 (a) The number of logging options was getting close to filling up the
3670 32-bit word that was used as a bit map. I have split them into two classes:
3671 those that are passed in the argument to log_write(), and those that are
3672 only ever tested independently outside of that function. These are now in
3673 separate 32-bit words, so there is plenty of room for expansion again.
3674 There is no change in the user interface or the logging behaviour.
3676 (b) When building, for example, log lines, the code previously used a
3677 macro that called string_cat() twice, in order to add two strings. This is
3678 not really sufficiently general. Furthermore, there was one instance where
3679 it was actually wrong because one of the argument was used twice, and in
3680 one call a function was used. (As it happened, calling the function twice
3681 did not affect the overall behaviour.) The macro has been replaced by a
3682 function that can join an arbitrary number of extra strings onto a growing
3685 (c) The code for expansion conditions now uses a table and a binary chop
3686 instead of a serial search (which was left over from when there were very
3687 few conditions). Also, it now recognizes conditions like "pam" even when
3688 the relevant support is not compiled in: a suitably worded error message is
3689 given if an attempt is made to use such a condition.
3691 11. Added ${time_interval:xxxxx}.
3693 12. A bug was causing one of the ddress fields not to be passed back correctly
3694 from remote delivery subprocesses. The field in question was not being
3695 subsequently used, so this caused to problems in practice.
3697 13. Added new log selectors queue_time and deliver_time.
3699 14. Might have fixed a bug in maildirsizefile handling that threw up
3700 "unexpected character" debug warnings, and recalculated the data
3701 unnecessarily. In any case, I expanded the warning message to give more
3704 15. Added the message "Restricted characters in address" to the statements in
3705 the default ACL that block characters like @ and % in local parts.
3707 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3708 Three changes have been made:
3710 (a) There was a serious bug; a negative response to MAIL caused the whole
3711 recipient domain to be cached as invalid, thereby blocking all messages
3712 to all local parts at the same domain, from all senders. This bug has
3713 been fixed. The domain is no longer cached after a negative response to
3714 MAIL if the sender used is not empty.
3716 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3719 (c) A new callout option, "use_sender" has been added for people who want
3720 the modified behaviour.
3726 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3729 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3730 indeed breaks things for older releases.
3732 3. Added additional logging to the case where there is a problem reading data
3733 from a filter that is running in a subprocess using a pipe, in order to
3734 try to track down a specific problem.
3736 4. Testing facility fudge: when running in the test harness and attempting
3737 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3738 getting "No route to host". Convert this to a timeout.
3740 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3743 6. Some OS don't have socklen_t but use size_t instead. This affects the
3744 fifth argument of getsockopt() amongst other things. This is now
3745 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3746 can be set for individual OS. I have set it for SunOS5, OSF1, and
3747 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3748 some earlier ones do not.
3750 7. Change 4.30/15 was not doing the test caselessly.
3752 8. The standard form for an IPv6 address literal was being rejected by address
3753 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3754 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3755 this, as well as the form without the "IPv6" on the front (but only when
3756 address literals are enabled, of course).
3758 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3760 10. Exim crashed if a message with an empty sender address specified by -f
3761 encountered a router with an errors_to setting. This could be provoked only
3762 by a command such as
3766 where an empty string was supplied; "<>" did not hit this bug.
3768 11. Installed PCRE release 4.5.
3770 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3771 remained set. It is now erased.
3773 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3774 times from message ids (which are base 36 rather than the normal 62).
3776 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3777 were being counted as actual protocol errors, and logged if the log
3778 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3779 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3780 and DATA following a set of rejected RCPTs do not count as protocol errors.
3781 In other words, Exim assumes they were pipelined, though this may not
3782 actually be the case. Of course, in all cases the client gets an
3783 appropriate error code.
3785 15. If a lookup fails in an ACL condition, a message about the failure may
3786 be available; it is used if testing the ACL cannot continue, because most
3787 such messages specify what the cause of the deferral is. However, some
3788 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3789 that caused an old message to be retained and used if a later statement
3790 caused a defer, replacing the real cause of the deferral.
3792 16. If an IP address had so many PTR records that the DNS lookup buffer
3793 was not large enough to hold them, Exim could crash while trying to process
3794 the truncated data. It now detects and logs this case.
3796 17. Further to 4.21/58, another change has been made: if (and only if) the
3797 first line of a message (the first header line) ends with CRLF, a bare LF
3798 in a subsequent header line has a space inserted after it, so as not to
3799 terminate the header.
3801 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3802 unnecessarily, used atoi() instead of strtol(), and didn't check the
3803 termination when getting file sizes from file names by regex.
3805 19. Completely re-implemented the support for maildirsize files, in the light
3806 of a number of problems with the previous contributed implementation
3807 (4.30/29). In particular:
3809 . If the quota is zero, the maildirsize file is maintained, but no quota is
3812 . If the maildir directory does not exist, it is created before any attempt
3813 to write a maildirsize file.
3815 . The quota value in the file is just a cache; if the quota is changed in
3816 the transport, the new value overrides.
3818 . A regular expression is available for excluding directories from the
3821 20. The autoreply transport checks the characters in options that define the
3822 message's headers; it allows continued headers, but it was checking with
3823 isspace() after an embedded newline instead of explicitly looking for a
3826 21. If all the "regular" hosts to which an address was routed had passed their
3827 expiry times, and had not reached their retry times, the address was
3828 bounced, even if fallback hosts were defined. Now Exim should go on to try
3831 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3832 equivalent code in the SMTP transport. Some hosts send humungous responses
3833 to HELO/EHLO, more than 1024 it seems.
3835 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3836 gives compiler warnings in some environments. I've now done it "properly",
3839 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3840 (because of problems with the built-in one) was declared to return uschar *
3841 instead of char *, causing compiler failure.
3843 25. Fixed a file descriptor leak when processing alias/forward files.
3845 26. Fixed a minor format string issue in dbfn.c.
3847 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3849 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3850 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3853 29. When a sender address is verified, it is cached, to save repeating the test
3854 when there is more than one recipient in a message. However, when the
3855 verification involves a callout, it is possible for different callout
3856 options to be set for different recipients. It is too complicated to keep
3857 track of this in the cache, so now Exim always runs a verification when a
3858 callout is required, relying on the callout cache for the optimization.
3859 The overhead is duplication of the address routing, but this should not be
3862 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3863 to be verified with callout=postmaster, and the main callout worked but the
3864 postmaster check failed, the verification correctly failed. However, if a
3865 subsequent RCPT command asked for sender verification *without* the
3866 postmaster check, incorrect caching caused this verification also to fail,
3869 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3870 it was not caching the DNS options (qualify_single, search_parents) that
3871 were used when the lookup failed. A subsequent lookup with different
3872 options therefore always gave the same answer, though there were cases
3873 where it should not have. (Example: a "domains = !$mx_any" option on a
3874 dnslookup router: the "domains" option is always processed without any
3875 widening, but the router might have qualify_single set.) Now Exim uses the
3876 cached value only when the same options are set.
3878 32. Added John Jetmore's "exipick" utility to the distribution.
3880 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3881 than a timeout (e.g. a certificate is required, and is not provided), an
3882 Exim server now closes the connection immediately. Previously it waited for
3883 the client to close - but if the client is SSL, it seems that they each
3884 wait for each other, leading to a delay before one of them times out.
3886 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3887 maintained 0.8.x compatibility because I don't think many are using it, and
3888 it is clearly obsolete.
3890 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3893 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3894 client certificate was expired. A simple patch fixes this, though I don't
3895 understand the full logic of why the verify callback is called multiple
3898 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3899 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3900 which causes problems with some clients (such as the Certicom SSL Plus
3901 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3902 disables the coutermeasure allowing Eudora to connect."
3904 38. Exim was not checking that a write() to a log file succeeded. This could
3905 lead to Bad Things if a log got too big, in particular if it hit a file
3906 size limit. Exim now panics and dies if it cannot write to a log file, just
3907 as it does if it cannot open a log file.
3909 39. Modified OS/Makefile-Linux so that it now contains
3911 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3913 The two -D definitions ensure that Exim is compiled with large file
3914 support, which makes it possible to handle log files that are bigger than
3917 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3918 instance) a domain was checked against a named list that involved a lookup,
3919 causing $domain_data to be set, then another domain was checked against the
3920 same list, then the first domain was re-checked, the value of $domain_data
3921 after the final check could be wrong. In particular, if the second check
3922 failed, it could be set empty. This bug probably also applied to
3925 41. The strip_trailing_dot option was not being applied to the address given
3926 with the -f command-line option.
3928 42. The code for reading a message's header from the spool was incrementing
3929 $received_count, but never initializing it. This meant that the value was
3930 incorrect (doubled) while delivering a message in the same process in which
3931 it was received. In the most common configuration of Exim, this never
3932 happens - a fresh exec is done - but it can happen when
3933 deliver_drop_privilege is set.
3935 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3936 it now includes up to 150 characters of the unexpected data in the log
3939 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3940 and building data strings. The size of both of these buffers was 10 000
3941 bytes - far larger than anybody would *ever* want, thought I. Needless to
3942 say, somebody hit the limit. I have increased the maximum line length to
3943 20 000 and the maximum data length of concatenated lines to 100 000. I have
3944 also fixed two bugs, because there was no checking on these buffers. Tsk,
3945 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3946 buffer is too small.
3948 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3949 lsearch lookups. Now it does.
3951 46. When parsing a route_list item in a manualroute router, a fixed-length
3952 buffer was used for the list of hosts. I made this 1024 bytes long,
3953 thinking that nobody would ever have a list of hosts that long. Wrong.
3954 Somebody had a whole pile of complicated expansion conditions, and the
3955 string was silently truncated, leading to an expansion error. It turns out
3956 that it is easier to change to an unlimited length (owing to other changes
3957 that have happened since this code was originally written) than to build
3958 structure for giving a limitation error. The length of the item that
3959 expands into the list of hosts is now unlimited.
3961 47. The lsearch lookup could not handle data where the length of text line was
3962 more than 4095 characters. Such lines were truncated, leading to shortened
3963 data being returned. It should now handle lines of any length.
3965 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3966 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3969 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3970 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3971 no longer happens in comment lines. A list of replacements is now placed
3972 at the head of all of the source files, except those whose only change is
3973 to replace PERL_COMMAND in the very first #! line.
3975 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3976 messages on the queue, with a bottom-up merge sort, using code contributed
3977 by Michael Haardt. This should make operations like -bp somewhat faster on
3978 large queues. It won't affect queue runners, except when queue_run_in_order
3981 51. Installed eximstats 1.31 in the distribution.
3983 52. Added support for SRV lookups to the dnslookup router.
3985 53. If an ACL referred to $message_body or $message_body_end, the value was not
3986 reset for any messages that followed in the same SMTP session.
3988 54. The store-handling optimization for building very long strings was not
3989 differentiating between the different store pools. I don't think this
3990 actually made any difference in practice, but I've tidied it.
3992 55. While running the routers to verify a sender address, $sender_address
3993 was still set to the sender address. This is wrong, because when routing to
3994 send a bounce to the sender, it would be empty. Therefore, I have changed
3995 it so that, while verifying a sender address, $sender_address is set to <>.
3996 (There is no change to what happens when verifying a recipient address.)
3998 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3999 target A or AAAA records (if not already returned) without resetting the
4000 qualify_single or search_parents options of the DNS resolver. These are
4001 inappropriate in this case because the targets of MX and SRV records must
4002 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4003 target that, when qualified, matched something in the local domain. These
4004 two options are now turned off when doing these lookups.
4006 57. It seems that at least some releases of Reiserfs (which does not have the
4007 concept of a fixed number of inodes) returns zero and not -1 for the
4008 number of available inodes. This interacted badly with check_spool_inodes,
4009 which assumed that -1 was the "no such thing" setting. What I have done is
4010 to check that the total number of inodes is greater than zero before doing
4011 the test of how many are available.
4013 58. When a "warn" ACL statement has a log_message modifier, the message is
4014 remembered, and not repeated. This is to avoid a lot of repetition when a
4015 message has many recipients that cause the same warning to be written.
4016 Howewer, Exim was preserving the list of already written lines for an
4017 entire SMTP session, which doesn't seem right. The memory is now reset if a
4018 new message is started.
4020 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4021 debugging output unless log_rewrite was also set.
4023 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4024 of (int)(handle) when we know that handle contains (void *)(-1).
4026 61. The Exim daemon panic-logs an error return when it closes the incoming
4027 connection. However "connection reset by peer" seems to be common, and
4028 isn't really an error worthy of noting specially, so that particular error
4031 62. When Exim is trying to find all the local interfaces, it used to panic and
4032 die if the ioctl to get the interface flags failed. However, it seems that
4033 on at least one OS (Solaris 9) it is possible to have an interface that is
4034 included in the list of interfaces, but for which you get a failure error
4035 for this call. This happens when the interface is not "plumbed" into a
4036 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4037 failure of the "get flags" call assumes that the interface is down.
4039 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4040 makes life easier for people who are doing arithmetic on fields extracted
4041 from dates, where you often get leading zeros that should not be
4042 interpreted as octal.
4044 64. Added qualify_domain to the redirect router, to override the global
4047 65. If a pathologically long header line contained very many addresses (the
4048 report of this problem mentioned 10 000) and each of them was rewritten,
4049 Exim could use up a very large amount of memory. (It kept on making new
4050 copies of the header line as it rewrote, and never released the old ones.)
4051 At the expense of a bit more processing, the header rewriting function has
4052 been changed so that it no longer eats memory in this way.
4054 66. The generation of the Received: header has been moved from the time that a
4055 message starts to be received, to the time that it finishes. The timestamp
4056 in the Received: header should now be very close to that of the <= log
4057 line. There are two side-effects of this change:
4059 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4060 logged header lines no longer include the local Received: line, because
4061 it has not yet been created. The same applies to a copy of the message
4062 that is returned to a non-SMTP sender when a message is rejected.
4064 (b) When a filter file is tested using -bf, no additional Received: header
4065 is added to the test message. After some thought, I decided that this
4068 This change does not affect the value of $received_for. It is still set
4069 after address rewriting, but before local_scan() is called.
4071 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4073 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4074 gave an unhelpful panic error message, and a defer error. I have managed to
4075 change this behaviour so that it now rejects any supplied certificate,
4076 which seems right, as the list of acceptable certificates is empty.
4078 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4079 gave an unhelpful defer error. I have not managed to make this reject any
4080 supplied certificates, but the error message it gives is "no certificate
4081 supplied", which is not helpful.
4083 70. exigrep's output now also includes lines that are not associated with any
4084 message, but which match the given pattern. Implemented by a patch from
4085 Martin Sluka, which also tidied up the Perl a bit.
4087 71. Recipient callout verification, like sender verification, was using <> in
4088 the MAIL FROM command. This isn't really the right thing, since the actual
4089 sender may affect whether the remote host accepts the recipient or not. I
4090 have changed it to use the actual sender in the callout; this means that
4091 the cache record is now keyed on a recipient/sender pair, not just the
4092 recipient address. There doesn't seem to be a real danger of callout loops,
4093 since a callout by the remote host to check the sender would use <>.
4094 [SEE ABOVE: changed after hitting problems.]
4096 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4097 temporary errors. However, in the case of such a code being given after
4098 the end of a data transmission (i.e. after ".") Exim was failing to write
4099 a retry record for the message. (Yes, there was some broken host that was
4100 actually sending 8xx at this point.)
4102 73. An unknown lookup type in a host list could cause Exim to panic-die when
4103 the list was checked. (An example that provoked this was putting <; in the
4104 middle of a list instead of at the start.) If this happened during a DATA
4105 ACL check, a -D file could be left lying around. This kind of configuration
4106 error no longer causes Exim to die; instead it causes a defer errror. The
4107 incident is still logged to the main and panic logs.
4109 74. Buglet left over from Exim 3 conversion. The message "too many messages
4110 in one connection" was written to the rejectlog but not the mainlog, except
4111 when address rewriting (yes!) was being logged.
4113 75. Added write_rejectlog option.
4115 76. When a system filter was run not as root (that is, when system_filter_user
4116 was set), the values of the $n variables were not being returned to the
4117 main process; thus, they were not subsequently available in the $sn
4120 77. Added +return_path_on_delivery log selector.
4122 78. A connection timeout was being treated differently from recipients deferred
4123 when testing hosts_max_try with a message that was older than the host's
4124 retry timeout. (The host should not be counted, thus allowing all hosts to
4125 be tried at least once before bouncing.) This may have been the cause of an
4126 occasionally reported bug whereby a message would remain on the queue
4127 longer than the retry timeout, but would be bounced if a delivery was
4128 forced. I say "may" because I never totally pinned down the problem;
4129 setting up timeout/retry tests is difficult. See also the next item.
4131 79. The ultimate address timeout was not being applied to errors that involved
4132 a combination of host plus message (for example, a timeout on a MAIL
4133 command). When an address resolved to a number of possible hosts, and they
4134 were not all tried for each delivery (e.g. because of hosts_max_try), a
4135 message could remain on the queue longer than the retry timeout.
4137 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4140 81. Fixed an obscure SMTP outgoing bug which required at least the following
4141 conditions: (a) there was another message waiting for the same server;
4142 (b) the server returned 5xx to all RCPT commands in the first message so
4143 that the message was not completed; (c) the server dropped the connection
4144 or gave a negative response to the RSET that Exim sends to abort the
4145 transaction. The observed case was a dropped connection after DATA that had
4146 been sent in pipelining mode. That is, the server had advertised PIPELINING
4147 but was not implementing it correctly. The effect of the bug was incorrect
4148 behaviour, such as trying another host, and this could lead to a crash.
4154 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4155 and daemon.c were passed as pointers to ints; they should have been
4156 pointers to socklen_t variables (which are typically unsigned ints).
4158 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4161 3. Fixed a really odd bug that affected only the testing scheme; patching a
4162 certain fixed string in the binary changed the value of another string that
4163 happened to be identical to the end of the original first string.
4165 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4166 name", it returns that address as the IP address. On some operating
4167 systems (e.g. Solaris), it also passes back the IP address string as the
4168 "host name". However, on others (e.g. Linux), it passes back an empty
4169 string. Exim wasn't checking for this, and was changing the host name to an
4170 empty string, assuming it had been canonicized.
4172 5. Although rare, it is permitted to have more than one PTR record for a given
4173 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4174 all the names associated with an address, because they do in Solaris.
4175 However, it seems that they do not in Linux for data that comes from the
4176 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4177 I found this out when I moved to a new Linux workstation and tried to run
4178 the Exim test suite.
4180 To get round this problem I have changed the code so that it now does its
4181 own call to the DNS to look up PTR records when searching for a host name.
4182 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4183 addresses that are only in /etc/hosts are still found.
4185 This behaviour is, however, controlled by an option called host_lookup_
4186 order, which defaults to "bydns:byaddr". If people want to use the other
4187 order, or indeed, just use one or the other means of lookup, they can
4188 specify it in this variable.
4190 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4191 some operating systems, this comes back from gethostbyaddr() as an empty
4192 string, and this is what Exim used to test for. However, it seems that in
4193 other systems, "." is yielded. Exim now tests for this case too.
4195 7. The values of check_spool_space and check_log_space are now held internally
4196 as a number of kilobytes instead of an absolute number of bytes. If a
4197 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4198 kilobyte. This means that much larger values can be stored.
4200 8. Exim monitor: an attempt to get the action menu when not actually pointing
4201 at a message produces an empty menu entitled "No message selected". This
4202 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4203 no entries in it ("Shell widget menu has zero width and/or height"). So I
4204 have added a single, blank menu entry in this case.
4206 9. Added ${quote_local_part.
4208 10. MIME decoding is now applied to the contents of Subject: header lines when
4211 11. Now that a reference to $sender_host_address automatically causes a reverse
4212 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4213 host lookup before query-style lookups in lists that might use this
4214 variable. This has therefore been abolished, and the "net-" prefix is no
4215 longer necessary for query-style lookups.
4217 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4218 have been a typo for LFLAGS, so it has been changed.
4220 13. The install script calls Exim with "-C /dev/null" in order to find the
4221 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4222 to be output. Howeve, since Exim outputs its version number before the
4223 error, it didn't break the script. It just looked ugly. I fixed this by
4224 always allowing "-C /dev/null" if the caller is root.
4226 14. Ignore overlarge ACL variable number when reading spool file - insurance
4227 against a later release with more variables having written the file.
4229 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4230 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4231 this, as well as the form without the "IPv6" on the front.
4233 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4234 OS/Makefile-Darwin file.
4236 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4237 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4239 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4240 variable. However, some OS use ints for inodes. I've added cast to long int
4241 to get rid of the compiler warning.
4243 19. I had forgotten to lock out "/../" in configuration file names when
4244 ALT_CONFIG_PREFIX was set.
4246 20. Routers used for verification do not need to specify transports. However,
4247 if such a router generated a host list, and callout was configured, Exim
4248 crashed, because it could not find a port number from the (non-existent)
4249 transport. It now assumes port 25 in this circumstance.
4251 21. Added the -t option to exigrep.
4253 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4254 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4255 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4256 them is set, LOOKUP_LSEARCH is forced.
4258 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4260 24. Added sender and host information to the "rejected by local_scan()" log
4261 line; previously there was no indication of these.
4263 25. Added .include_if_exists.
4265 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4266 Linux. It turns out that not all file systems support this. Apparently some
4267 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4268 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4269 not supported on the file descriptor, is now ignored when Exim is trying to
4270 sync a directory. This applies only to Linux.
4272 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4274 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4275 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4278 29. Added support for maildirsize files from supplied patch (modified a bit).
4280 30. The use of :fail: followed by an empty string could lead Exim to respond to
4281 sender verification failures with (e.g.):
4283 550 Verification failed for <xxx>
4284 550 Sender verify failed
4286 where the first response line was missing the '-' that indicates it is not
4287 the final line of the response.
4289 31. The loop for finding the name of the user that called Exim had a hardwired
4290 limit of 10; it now uses the value of finduser_retries, which is used for
4291 all other user lookups.
4293 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4296 33. Exim was neglecting to zero errno before one call of strtol() when
4297 expanding a string and expecting an integer value. On some systems this
4298 resulted in spurious "integer overflow" errors. Also, it was casting the
4299 result into an int without checking.
4301 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4302 did not work. The code looks as if it has *never* worked, though it appears
4303 to have been documented since at least releast 1.62. I have made it work.
4305 35. The "timeout_DNS" error in retry rules, also documented since at least
4306 1.62, also never worked. As it isn't clear exactly what this means, and
4307 clearly it isn't a major issue, I have abolished the feature by treating it
4308 as "timeout", and writing a warning to the main and panic logs.
4310 36. The display of retry rules for -brt wasn't always showing the error code
4313 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4314 timeout_connect_A, timeout_connect_MX.
4316 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4317 to the empty sender.
4319 39. The daemon was not analysing the content of -oX till after it had closed
4320 stderr and disconnected from the controlling terminal. This meant that any
4321 syntax errors were only noted on the panic log, and the return code from
4322 the command was 0. By re-arranging the code a little, I've made the
4323 decoding happen first, so such errors now appear on stderr, and the return
4324 code is 1. However, the actual setting up of the sockets still happens in
4325 the disconnected process, so errors there are still only recorded on the
4328 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4329 connections (as happens on some IP stacks) was logged at start up time as
4330 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4331 it from "IPv6 and IPv4", which means that two separate sockets are being
4334 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4335 says whether AF_INET or AF_INET6 was passed as an argument.
4337 42. Exiwhat output was messed up when time zones were included in log
4340 43. Exiwhat now gives more information about the daemon's listening ports,
4341 and whether -tls-on-connect was used.
4343 44. The "port" option of the smtp transport is now expanded.
4345 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4346 silently ignored. Now an error message is written to the main and panic
4349 46. There's a new ACL modifier called "logwrite" which writes to a log file
4350 as soon as it is encountered.
4352 47. Added $local_user_uid and $local_user_gid at routing time.
4354 48. Exim crashed when trying to verify a sender address that was being
4357 49. Exim was recognizing only a space character after ".include". It now also
4358 recognizes a tab character.
4360 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4361 extracting the relevant information from the specification. The man page no
4362 longer contains scrambled data for the -d option, and I've added a section
4363 at the front about calling Exim under different names.
4365 51. Added "extra_headers" argument to the "mail" command in filter files.
4367 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4370 53. Installed eximstats 1.29.
4372 54. Added transport_filter_timeout as a generic transport option.
4374 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4375 Cc: header lines. This was required by RFC 822, but it not required by RFC
4378 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4379 incoming messages that did not have them. Now it does so only if the
4380 message originates locally, that is, if there is no associated remote host
4381 address. When Resent- header lines are present, this applies to the Resent-
4382 lines rather than the non-Resent- lines.
4384 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4385 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4387 58. Messages for configuration errors now include the name of the main
4388 configuration file - useful now that there may be more than one file in a
4389 list (.included file names were always shown).
4391 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4392 for those rare installations that do not start the daemon as root or run it
4393 setuid root. I've cut out the call to initgroups() if the daemon is not
4396 60. The Exim user and group can now be bound into the binary as text strings
4397 that are looked up at the start of Exim's processing.
4399 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4401 62. Added $mailstore_basename variable.
4403 63. Installed patch to sieve.c from Michael Haardt.
4405 64. When Exim failed to open the panic log after failing to open the main log,
4406 the original message it was trying to log was written to stderr and debug
4407 output, but if they were not available (the usual case in production), it
4408 was lost. Now it is written to syslog before the two lines that record the
4409 failures to open the logs.
4411 65. Users' Exim filters run in subprocesses under the user's uid. It is
4412 possible for a "deliver" command or an alias in a "personal" command to
4413 provoke an address rewrite. If logging of address rewriting is configured,
4414 this fails because the process is not running as root or exim. There may be
4415 a better way of dealing with this, but for the moment (because 4.30 needs
4416 to be released), I have disabled address rewrite logging when running a
4417 filter in a non-root, non-exim process.
4423 1. The buildconfig auxiliary program wasn't quoting the value set for
4424 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4425 not defined. This bug was masked in 4.22 by the effect that was fixed in
4428 2. Some messages that were rejected after a message id was allocated were
4429 shown as "incomplete" by exigrep. It no longer does this for messages that
4430 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4432 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4433 have allow_domain_literals set, the ID did not get logged in the <= line.
4434 Domain literals are now always recognized in Message-ID: header lines.
4436 4. The first argument for a ${extract expansion item is the key name or field
4437 number. Leading and trailing spaces in this item were not being ignored,
4438 causing some misleading effects.
4440 5. When deliver_drop_privilege was set, single queue runner processes started
4441 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4442 same command in the process it spins off) were not dropping privilege.
4444 6. When the daemon running as "exim" started a queue runner, it always
4445 re-executed Exim in the spun-off process. This is a waste of effort when
4446 deliver_drop_privilege is set. The new process now just calls the
4447 queue-runner function directly.
4453 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4456 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4457 ignored. Though the use of -oP was forcing the writing of a pid file, it
4458 was always written to the default place.
4460 3. If the message "no IP address found for host xxxx" is generated during
4461 incoming verification, it is now followed by identification of the incoming
4462 connection (so you can more easily find what provoked it).
4464 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4466 5. Added some features to "harden" Exim a bit more against certain attacks:
4468 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4469 be put in Local/Makefile. This is like the never_users runtime option,
4470 but it cannot be overridden. The default setting is "root".
4472 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4473 prefix string with which any file named in a -C command line option
4476 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4477 is retained for -C and -D only if the caller of Exim is root. Without
4478 it, the exim user may also use -C and -D and retain privilege.
4480 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4481 command line option is disabled.
4483 6. Macro names set by the -D option must start with an upper case letter, just
4484 like macro names defined in the configuration file.
4486 7. Added "dereference=" facility to LDAP.
4488 8. Two instances of the typo "uknown" in the source files are fixed.
4490 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4491 the Configure-Makefile script screwed up while processing it.
4493 10. Incorporated PCRE 4.4.
4495 11. The SMTP synchronization check was not operating right at the start of an
4496 SMTP session. For example, it could not catch a HELO sent before the client
4497 waited for the greeting. There is now a check for outstanding input at the
4498 point when the greeting is written. Because of the duplex, asynchronous
4499 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4500 way, but not yet received, when the check is performed.
4502 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4503 on TCP/IP sockets, because this apparently causes some broken clients to
4506 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4507 unchanged) from the Cygwin maintainer.
4509 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4510 was supported instead of testing for mbx. Effectively a typo.
4512 15. The spa authenticator server code was not checking that the input it
4513 received was valid base64.
4515 16. The debug output line for the "set" modifier in ACLs was not showing the
4516 name of the variable that was being set.
4518 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4520 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4521 lookup on its own. Something else was needed to trigger the lookup. For
4522 example, a match in host_lookup or the need for a host name in a host list.
4523 Now, if $sender_host_name is referenced and the host name has not yet been
4524 looked up, a lookup is performed. If the lookup fails, the variable remains
4525 empty, and $host_lookup_failed is set to "1".
4527 19. Added "eqi" as a case-independent comparison operator.
4529 20. The saslauthd authentication condition could segfault if neither service
4530 nor realm was specified.
4532 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4533 error message that was logged was misleading, and incoming SMTP
4534 connections were dropped. The message is now more accurate, and temporary
4535 errors are given to SMTP connections.
4537 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4538 (except RSET) with a 421 error, until QUIT is received. However, it was
4539 failing to send a response to QUIT.
4541 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4542 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4543 ACL is now run after the helo_try_verify_hosts code.
4545 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4546 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4547 case-independent, so other case variants are also recognized). Apparently
4548 some systems use these upper case variants.
4550 25. If more than two messages were waiting for the same host, and a transport
4551 filter was specified for the transport, Exim sent two messages over the
4552 same TCP/IP connection, and then failed with "socket operation on non-
4553 socket" when it tried to send the third.
4555 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4557 27. The extern definition of crypt16() in expand.c was not being excluded when
4558 the OS had its own crypt16() function.
4560 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4561 as a preferred synonym for return_size_limit, both as an option and as an
4564 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4566 30. Changed the default configuration ACL to relax the local part checking rule
4567 for addresses that are not in any local domains. For these addresses,
4568 slashes and pipe symbols are allowed within local parts, but the sequence
4569 /../ is explicitly forbidden.
4571 31. SPA server authentication was not clearing the challenge buffer before
4574 32. log_message in a "warn" ACL statement was writing to the reject log as
4575 well as to the main log, which contradicts the documentation and doesn't
4576 seem right (because no rejection is happening). So I have stopped it.
4578 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4579 However, I am unable to do any testing of this.
4581 34. Fixed an infelicity in the appendfile transport. When checking directories
4582 for a mailbox, to see if any needed to be created, it was accidentally
4583 using path names with one or more superfluous leading slashes; tracing
4584 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4586 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4587 contents are added to the log line that is written for every discarded
4588 recipient. (Previously a log_message setting was ignored.)
4590 36. The ${quote: operator now quotes the string if it is empty.
4592 37. The install script runs exim in order to find its version number. If for
4593 some reason other than non-existence or emptiness, which it checks, it
4594 could not run './exim', it was installing it with an empty version number,
4595 i.e. as "exim-". This error state is now caught, and the installation is
4598 38. An argument was missing from the function that creates an error message
4599 when Exim fails to connect to the socket for saslauthd authentication.
4600 This could cause Exim to crash, or give a corrupted message.
4602 39. Added isip, isip4, and isip6 to ${if conditions.
4604 40. The ACL variables $acl_xx are now saved with the message, and can be
4605 accessed later in routers, transports, and filters.
4607 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4608 strings in the file are not string-expanded.
4610 42. If a MAIL command specified a SIZE value that was too large to fit into an
4611 int variable, the check against message_size_limit failed. Such values are
4612 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4613 day this will have to be increased, but I don't think I want to be around
4614 when emails are that large.
4621 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4622 iconv() is not standard in FreeBSD.
4624 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4625 IPv6 enabled. The observed symptom was a segmentation fault on return from
4626 the function os_common_find_running_interfaces() in src/os.c.
4628 3. In the check_special_case() function in daemon.c I had used "errno" as an
4629 argument name, which causes warnings on some systems. This was basically a
4630 typo, since it was named "eno" in the comments!
4632 4. The code that waits for the clock to tick (at a resolution of some fraction
4633 of a second) so as to ensure message-id uniqueness was always waiting for
4634 at least one whole tick, when it could have waited for less. [This is
4635 almost certainly not relevant at current processor speeds, where it is
4636 unlikely to ever wait at all. But we try to future-proof.]
4638 5. The function that sleeps for a time interval that includes fractions of a
4639 second contained a race. It did not block SIGALRM between setting the
4640 timer, and suspending (a couple of lines later). If the interval was short
4641 and the sigsuspend() was delayed until after it had expired, the suspension
4642 never ended. On busy systems this could lead to processes getting stuck for
4645 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4646 process, before it forks any delivery processes. The open lookup caching
4647 mechanism meant that the open file or database connection was passed into
4648 the delivery process. The problem was that delivery processes always tidy
4649 up cached lookup data. This could cause a problem for the next delivery
4650 process started by the queue runner, because the external queue runner
4651 process does not know about the closure. So the next delivery process
4652 still has data in the lookup cache. In the case of a file lookup, there was
4653 no problem because closing a file descriptor in a subprocess doesn't affect
4654 the parent. However, if the lookup was caching a connection to a database,
4655 the connection was closed, and the second delivery process was likely to
4656 see errors such as "PGSQL: query failed: server closed the connection
4657 unexpectedly". The problem has been fixed by closing all cached lookups
4658 in a queue runner before running a delivery process.
4660 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4661 seem to have the "const" qualifier which it has on other OS. I've
4664 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4665 *of the same type* (client or server) with the same public name that an
4666 error should be diagnosed.
4668 9. When Exim looked up a host name for an IP address, but failed to find the
4669 original IP address when looking up the host name (a safety check), it
4670 output the message "<ip address> does not match any IP for NULL", which was
4671 confusing, to say the least. The bug was that the host name should have
4672 appeared instead of "NULL".
4674 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4675 user that is built into the binary, and the -C or -D options is used, root
4676 privilege is dropped before the configuration file is read. In addition,
4677 logging is switched to stderr instead of the normal log files. If the
4678 configuration then re-defines the Exim user, the unprivileged environment
4679 is probably not what is expected, so Exim logs a panic warning message (but
4682 However, if deliver_drop_privilege is set, the unprivileged state may well
4683 be exactly what is intended, so the warning has been cut out in that case,
4684 and Exim is allowed to try to write to its normal log files.
4690 1. smtp_return_error_details was not giving details for temporary sender
4691 or receiver verification errors.
4693 2. Diagnose a configuration error if two authenticators have the same public
4696 3. Exim used not to create the message log file for a message until the first
4697 delivery attempt. This could be confusing when incoming messages were held
4698 for policy or load reasons. The message log file is now created at the time
4699 the message is received, and an initial "Received" line is written to it.
4701 4. The automatically generated man page for command line options had a minor
4702 bug that caused no ill effects; however, a more serious problem was that
4703 the procedure for building the man page automatically didn't always
4704 operate. Consequently, release 4.20 contains an out-of-date version. This
4705 shouldn't happen again.
4707 5. When building Exim with embedded Perl support, the script that builds the
4708 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4709 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4711 6. The freeze_tell option was not being used for messages that were frozen on
4712 arrival, either by an ACL or by local_scan().
4714 7. Added the smtp_incomplete_transaction log selector.
4716 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4717 was accepting AUTH without a new EHLO.
4719 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4720 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4723 10. Logging of TCP/IP connections (when configured) now happens in the main
4724 daemon process instead of the child process, so that the TCP/IP connection
4725 count is more accurate (but it can never be perfect).
4727 11. The use of "drop" in a nested ACL was not being handled correctly in the
4728 outer ACL. Now, if condition failure induced by the nested "drop" causes
4729 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4730 or "require"), the connection is dropped.
4732 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4733 that yield "discard" can now be used with an "accept" or a "discard" verb,
4734 but an error is generated for any others (because I can't see a useful way
4735 to define what should happen).
4737 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4738 are now processed in the same way as lines in the Exim configuration file.
4739 In particular, continuation lines are supported.
4741 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4743 15. Added -ti meaning -t -i.
4745 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4746 domains, and warn by logging if others are found.
4748 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4749 returned from GIFCONF when Exim is trying to find the list of interfaces on
4750 a host. The code in os.c has been modified to copy each ifreq to an aligned
4751 structure in all cases.
4753 Also, in some cases, the returned ifreq's were being copied to a 'struct
4754 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4755 means the last couple of bytes of an IPv6 address could be chopped if the
4756 ifreq contained only a normal sockaddr (14 bytes storage).
4758 18. Named domain lists were not supported in the hosts_treat_as_local option.
4759 An entry such as +xxxx was not recognized, and was treated as a literal
4762 19. Ensure that header lines added by a DATA ACL are included in the reject log
4763 if the ACL subsequently rejects the message.
4765 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4766 MD5 (which is deprecated).
4768 21. When testing a filter file using -bf, Exim was writing a message when it
4769 took the sender from a "From " line in the message, but it was not doing so
4770 when it took $return_path from a Return-Path: header line. It now does.
4772 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4773 with a valid header line field name (a series of printing characters
4774 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4776 23. Changed "disc" in the source to "disk" to conform to the documentation and
4777 the book and for uniformity.
4779 24. Ignore Sendmail's -Ooption=value command line item.
4781 25. When execve() failed while trying to run a command in a pipe transport,
4782 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4783 could be confused with a return value of 69 from the command itself. This
4784 has been changed to 127, the value the shell returns if it is asked to run
4785 a non-existent command. The wording for the related log line suggests a
4786 non-existent command as the problem.
4788 26. If received_header_text expands to an empty string, do not add a Received:
4789 header line to the message. (Well, it adds a token one on the spool, but
4790 marks it "old" so that it doesn't get used or transmitted.)
4792 27. Installed eximstats 1.28 (addition of -nt option).
4794 28. There was no check for failure on the call to getsockname() in the daemon
4795 code. This can fail if there is a shortage of resources on the system, with
4796 ENOMEM, for example. A temporary error is now given on failure.
4798 29. Contrary to the C standard, it seems that in some environments, the
4799 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4800 program. Exim now does this explicitly; it affects the formatting of
4801 timestamps using strftime().
4803 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4804 complaints. I've now initialized all the variables, to avoid this.
4806 32. Header lines added by a system filter were not being "seen" during
4807 transport-time rewrites.
4809 33. The info_callback() function passed to OpenSSL is set up with type void
4810 (*)(SSL *, int, int), as described somewhere. However, when calling the
4811 function (actually a macro) that sets it up, the type void(*)() is
4812 expected. I've put in a cast to prevent warnings from picky compilers.
4814 34. If a DNS black list lookup found a CNAME record, but there were no A
4815 records associated with the domain it pointed at, Exim crashed.
4817 35. If a DNS black list lookup returned more than one A record, Exim ignored
4818 all but the first. It now scans all returned addresses if a particular IP
4819 value is being sought. In this situation, the contents of the
4820 $dnslist_value variable are a list of all the addresses, separated by a
4823 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4824 to accept a host name and all its aliases if the forward lookup for any of
4825 them yielded the IP address of the incoming connection. Now it accepts only
4826 those names whose forward lookup yields the correct IP address. Any other
4827 names are discarded. This closes a loophole whereby a rogue DNS
4828 administrator could create reverse DNS records to break through a
4829 wildcarded host restriction in an ACL.
4831 37. If a user filter or a system filter that ran in a subprocess used any of
4832 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4833 the wrong values were passed to the pipe command ($thisaddress had the
4834 value of $0, $0 had the value of $1, etc). This bug was introduced by
4835 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4837 38. Improved the line breaking for long SMTP error messages from ACLs.
4838 Previously, if there was no break point between 40 and 75 characters, Exim
4839 left the rest of the message alone. Two changes have been made: (a) I've
4840 reduced the minimum length to 35 characters; (b) if it can't find a break
4841 point between 35 and 75 characters, it looks ahead and uses the first one
4842 that it finds. This may give the occasional overlong line, but at least the
4843 remaining text gets split now.
4845 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4846 file descriptors might be low, and that setting 1000 would always raise it.
4847 It turns out that in some environments, the limit is already over 1000 and
4848 that lowering it causes trouble. So now Exim takes care not to decrease it.
4850 40. When delivering a message, the value of $return_path is set to $sender_
4851 address at the start of routing (routers may change the value). By an
4852 oversight, this default was not being set up when an address was tested by
4853 -bt or -bv, which affected the outcome if any router or filter referred to
4856 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4857 log only when "message" or "log_message" are set. However, if one of the
4858 conditions was an address verification, or a call to a nested ACL, the
4859 messages generated by the underlying test were being passed through. This
4860 no longer happens. The underlying message is available in $acl_verify_
4861 message for both "message" and "log_message" expansions, so it can be
4862 passed through if needed.
4864 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4865 new expansion $bh_ to give the encoded byte string without charset
4866 translation. Translation happens only if iconv() is available; HAVE_ICONV
4867 indicates this at build time. HEADERS_CHARSET gives the charset to
4868 translate to; headers_charset can change it in the configuration, and
4869 "headers charset" can change it in an individual filter file.
4871 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4872 that creates RFC 2047 encoded "words" labels them as that charset instead
4873 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4874 expansion operator; (ii) when Exim creates a From: line for a local
4875 message; (iii) when a header line is rewritten to include a "phrase" part.
4877 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4878 buggy, causing it to skip the first lines of messages whose message ID
4879 ended in 'D'. This would not have bitten before Exim release 4.14, because
4880 message IDs were unlikely to end in 'D' before then. The effect was to have
4881 incorrect size information for certain domains.
4883 45. #include "config.h" was missing at the start of the crypt16.c module. This
4884 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4887 46. If there was a timeout during a "random" callout check, Exim treated it as
4888 a failure of the random address, and carried on sending RSET and the real
4889 address. If the delay was just some slowness somewhere, the response to the
4890 original RCPT would be taken as a response to RSET and so on, causing
4891 mayhem of various kinds.
4893 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4894 when I implemented it. It didn't allow for the fact that some option values
4895 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4896 the right test for positive values.
4898 48. Domain names in DNS records are case-independent. Exim always looks them up
4899 in lower case. Some resolvers return domain names in exactly the case they
4900 appear in the zone file, that is, they may contain uppercase letters. Not
4901 all resolvers do this - some return always lower case. Exim was treating a
4902 change of case by a resolver as a change of domain, similar to a widening
4903 of a domain abbreviation. This triggered its re-routing code and so it was
4904 trying to route what was effectively the same domain again. This normally
4905 caused routing to fail (because the router wouldn't handle the domain
4906 twice). Now Exim checks for this case specially, and just changes the
4907 casing of the domain that it ultimately uses when it transmits the message
4910 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4913 50. If a filter generated a file delivery with a non-absolute name (possible if
4914 no home directory exists for the router), the forbid_file option was not
4917 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4918 the existing equality matching.
4920 52. Exim was using ints instead of ino_t variables in some places where it was
4921 dealing with inode numbers.
4923 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4924 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4925 called TMPDIR, and if it finds it is different, it changes its value.
4927 54. The smtp_printf() function is now made available to local_scan() so
4928 additional output lines can be written before returning. There is also an
4929 smtp_fflush() function to enable the detection of a dropped connection.
4930 The variables smtp_input and smtp_batched_input are exported to
4933 55. Changed the default runtime configuration: the message "Unknown user"
4934 has been removed from the ACL, and instead placed on the localuser router,
4935 using the cannot_route_message feature. This means that any verification
4936 failures that generate their own messages won't get overridden. Similarly,
4937 the "Unrouteable address" message that was in the ACL for unverifiable
4938 relay addresses has also been removed.
4940 56. Added hosts_avoid_esmtp to the smtp transport.
4942 57. The exicyclog script was not checking for the esoteric option
4943 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4944 will work only if exicyclog is run under the appropriate euid.
4946 58. Following a discussion on the list, the rules by which Exim recognises line
4947 endings on incoming messages have been changed. The -dropcr and drop_cr
4948 options are now no-ops, retained only for backwards compatibility. The
4949 following line terminators are recognized: LF CRLF CR. However, special
4950 processing applies to CR:
4952 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4953 nor a local message in the state where . is a terminator.
4955 (ii) If a bare CR is encountered in a header line, an extra space is added
4956 after the line terminator so as not to end the header. The reasoning
4957 behind this is that bare CRs in header lines are most likely either
4958 to be mistakes, or people trying to play silly games.
4960 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4961 was being incorrectly given as 18 bytes larger than it should have been.
4962 This is a VOB (very old bug).
4964 60. This may never have affected anything current, but just in case it has:
4965 When the local host is found other than at the start of a list of hosts,
4966 the local host, those with the same MX, and any that follow, are discarded.
4967 When the list in question was part of a longer list of hosts, the following
4968 hosts (not currently being processed) were also being discarded. This no
4969 longer happens. I'm not sure if this situation could ever has previously
4972 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4975 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4976 header. This is something that is recommended in a new Internet Draft, and
4977 is something that is documented as being done by Sendmail. There are two
4978 possible values. For messages generated by the autoreply transport, Exim
4981 Auto-Submitted: auto-replied
4983 whereas for all other generated messages (e.g. bounces) it adds
4985 Auto-Submitted: auto-generated
4987 63. The "personal" condition in filters now includes a test for the
4988 Auto-Submitted: header. If it contains the string "auto-" the message it
4989 not considered personal.
4991 64. Added rcpt_include_affixes as a generic transport option.
4993 65. Added queue_only_override (default true).
4995 66. Added the syslog_duplication option.
4997 67. If what should have been the first header line of a message consisted of
4998 a space followed by a colon, Exim was mis-interpreting it as a header line.
4999 It isn't of course - it is syntactically invalid and should therefore be
5000 treated as the start of the message body. The misbehaviour could have
5001 caused a number of strange effects, including loss of data in subsequent
5002 header lines, and spool format errors.
5004 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5005 client host had authenticated. This control can now be exercised by an ACL
5006 for more flexibility.
5008 69. By default, callouts do not happen when testing with -bh. There is now a
5009 variant, -bhc, which does actually run the callout code, including
5010 consulting and updating the callout cache.
5012 70. Added support for saslauthd authentication, courtesy of Alexander
5015 71. If statvfs() failed on the spool or log directories while checking their
5016 size for availability, Exim confusingly gave the error "space shortage".
5017 Furthermore, in debugging mode it crashed with a floating point exception.
5018 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5019 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5020 serious problem, Exim now writes to the main and panic logs when this
5021 happens, with details of the failure. It then refuses to accept the
5022 incoming message, giving the message "spool directory problem" or "log
5023 directory problem" with a 421 code for SMTP messages.
5025 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5026 0, 1, and 2 exist, because some OS complain for execs without them (see
5027 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5028 descriptors. However, the code omitted to check that the open succeeded,
5029 causing mysterious errors if for some reason the permissions on /dev/null
5030 got screwed. Now Exim writes a message to the main and panic logs, and
5031 bombs out if it can't open /dev/null.
5033 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5034 interact so that it is all more flexible. It is supposed to remain
5035 backwards compatible. Also added extra_local_interfaces.
5037 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5038 to bomb out with an assertion failure - to the client this appears as a
5039 connection drop. This problem occurs in the part of the code that was taken
5040 from the Samba project. Fortunately, the assertion is in a very simple
5041 function, so I have fixed this by reproducing the function inline in the
5042 one place where it is called, and arranging for authentication to fail
5043 instead of killing the process with assert().
5045 75. The SPA client code was not working when the server requested OEM rather
5046 than Unicode encoding.
5048 76. Added code to make require_files with a specific uid setting more usable in
5049 the case where statting the file as root fails - usually a non-root-mounted
5050 NFS file system. When this happens and the failure is EACCES, Exim now
5051 forks a subprocess and does the per-uid checking as the relevant uid.
5053 77. Added process_log_path.
5055 78. If log_file_path was not explicitly set, a setting of check_log_space or
5056 check_log_inodes was ignored.
5058 79. If a space check for the spool or log partitions fails, the incident is now
5059 logged. Of course, in the latter case the data may get lost...
5061 80. Added the %p formatting code to string_format() so that it can be used to
5062 print addresses in debug_print(). Adjusted all the address printing in the
5063 debugging in store.c to use %p rather than %d.
5065 81. There was a concern that a line of code in smtp_in.c could overflow a
5066 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5067 initially expressed, the concern was not well-founded, because trailing
5068 spaces are removed early. However, if the trailing spaces were followed by
5069 a NULL, they did not get removed, so the overflow was possible. Two fixes
5072 (a) I re-wrote the offending code in a cleaner fashion.
5073 (b) If an incoming SMTP command contains a NULL character, it is rejected
5076 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5077 runs initgroups(), so that if the Exim user is in any additional groups,
5078 they will be used during message reception.
5084 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob