1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.604 2010/03/05 16:08:15 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
11 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
13 NM/01 Bugzilla 965: Support mysql stored procedures.
14 Patch from Alain Williams
16 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
18 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
19 Patch from Andreas Metzler
25 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
27 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
29 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
31 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
33 NM/04 Bugzilla 915: Flag broken perl installation during build.
39 TK/01 Added patch by Johannes Berg that expands the main option
40 "spamd_address" if it starts with a dollar sign.
42 TK/02 Write list of recipients to X-Envelope-Sender header when building
43 the mbox-format spool file for content scanning (suggested by Jakob
46 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
47 (http://www.dcc-servers.net/) support via dccifd. Activated by
48 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
50 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
51 by Mark Daniel Reidel <mr@df.eu>.
53 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
54 When building exim an external PCRE library is now needed -
55 PCRE is a system library on the majority of modern systems.
56 See entry on PCRE_LIBS in EDITME file.
58 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
59 conversation. Added nologin parameter to request.
60 Patch contributed by Kirill Miazine
62 TF/01 Do not log submission mode rewrites if they do not change the address.
64 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
66 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
67 log files in place. Contributed by Roberto Lima
69 NM/04 Bugzilla 667: close socket used by dovecot authenticator
71 TF/03 Bugzilla 615: When checking the local_parts router precondition
72 after a local_part_suffix or local_part_prefix option, Exim now
73 does not use the address's named list lookup cache, since this
74 contains cached lookups for the whole local part.
76 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
77 Robert Millan. Documentation is in experimental-spec.txt
79 TF/04 Bugzilla 668: Fix parallel build (make -j).
81 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
83 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
84 Patch provided by Jan Srzednicki
86 TF/05 Leading white space used to be stripped from $spam_report which
87 wrecked the formatting. Now it is preserved.
89 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
90 that they are available at delivery time.
92 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
94 TF/08 TLS error reporting now respects the incoming_interface and
95 incoming_port log selectors.
97 TF/09 Produce a more useful error message if an SMTP transport's hosts
98 setting expands to an empty string.
100 NM/06 Bugzilla 744: EXPN did not work under TLS.
101 Patch provided by Phil Pennock
103 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
104 Patch provided by Richard Godbee
106 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
107 acl_smtp_notquit, added index entry.
109 NM/09 Bugzilla 787: Potential buffer overflow in string_format
110 Patch provided by Eugene Bujak
112 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
113 Patch provided by Maxim Dounin
115 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
116 Patch provided by Phil Pennock
118 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
120 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
121 Patch provided by Brad "anomie" Jorsch
123 NM/14 Bugzilla 622: Added timeout setting to transport filter.
124 Patch provided by Dean Brooks
126 TK/05 Add native DKIM support (does not depend on external libraries).
128 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
129 Patch provided by Graeme Fowler
131 NM/16 Bugzilla 851: Documentation example syntax fix.
133 NM/17 Changed NOTICE file to remove references to embedded PCRE.
135 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
137 NM/19 Bugzilla 745: TLS version reporting
138 Patch provided by Phil Pennock
140 NM/20 Bugzilla 167: bool: condition support
141 Patch provided by Phil Pennock
143 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
144 Patch provided by Phil Pennock
146 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
147 Patch provided by Brad "anomie" Jorsch
149 NM/23 Bugzilla 687: Fix misparses in eximstats
150 Patch provided by Heiko Schlittermann
152 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
153 Patch provided by Heiko Schlittermann
155 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
156 plus update to original patch.
158 NM/26 Bugzilla 799: Documentation correction for ratelimit
160 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
161 Patch provided by David Brownlee
163 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
165 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
167 NM/30 Bugzilla 888: TLS documentation bugfixes
169 NM/31 Bugzilla 896: Dovecot buffer overrun fix
171 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
172 Unlike the original bugzilla I have changed all shell scripts in src tree
174 NM/33 Bugzilla 898: Transport filter timeout fix
175 Patch by Todd Rinaldo
177 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
178 Patch by Serge Demonchaux
180 NM/35 Bugzilla 39: Base64 decode bug fixes
181 Patch by Jakob Hirsch
183 NM/36 Bugzilla 909: Correct connect() call in dcc code
185 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
187 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
189 NM/39 Bugzilla 911: Fixed MakeLinks build script
195 TK/01 Add preliminary DKIM support. Currently requires a forked version of
196 ALT-N's libdkim that I have put here:
197 http://duncanthrax.net/exim-experimental/
199 Note to Michael Haardt: I had to rename some vars in sieve.c. They
200 were called 'true' and it seems that C99 defines that as a reserved
201 keyword to be used with 'bool' variable types. That means you could
202 not include C99-style headers which use bools without triggering
203 build errors in sieve.c.
205 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
206 as mailq or other aliases. Changed the --help handling significantly
207 to do whats expected. exim_usage() emits usage/help information.
209 SC/01 Added the -bylocaldomain option to eximstats.
211 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
213 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
215 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
221 PH/01 Another patch from the Sieve maintainer.
223 PH/02 When an IPv6 address is converted to a string for single-key lookup
224 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
225 dots are used instead of colons so that keys in lsearch files need not
226 contain colons. This was done some time before quoting was made available
227 in lsearch files. However, iplsearch files do require colons in IPv6 keys
228 (notated using the quote facility) so as to distinguish them from IPv4
229 keys. This meant that lookups for IP addresses in host lists did not work
230 for iplsearch lookups.
232 This has been fixed by arranging for IPv6 addresses to be expressed with
233 colons if the lookup type is iplsearch. This is not incompatible, because
234 previously such lookups could never work.
236 The situation is now rather anomolous, since one *can* have colons in
237 ordinary lsearch keys. However, making the change in all cases is
238 incompatible and would probably break a number of configurations.
240 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
243 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
244 conversion specification without a maximum field width, thereby enabling
245 a rogue spamd server to cause a buffer overflow. While nobody in their
246 right mind would setup Exim to query an untrusted spamd server, an
247 attacker that gains access to a server running spamd could potentially
248 exploit this vulnerability to run arbitrary code as the Exim user.
250 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
251 $primary_hostname instead of what libspf2 thinks the hosts name is.
253 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
254 a directory entry by the name of the lookup key. Previously, if a
255 symlink pointed to a non-existing file or a file in a directory that
256 Exim lacked permissions to read, a lookup for a key matching that
257 symlink would fail. Now it is enough that a matching directory entry
258 exists, symlink or not. (Bugzilla 503.)
260 PH/03 The body_linecount and body_zerocount variables are now exported in the
263 PH/04 Added the $dnslist_matched variable.
265 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
266 This means they are set thereafter only if the connection becomes
269 PH/06 Added the client_condition to authenticators so that some can be skipped
270 by clients under certain conditions.
272 PH/07 The error message for a badly-placed control=no_multiline_responses left
273 "_responses" off the end of the name.
275 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
277 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
278 (without spaces) instead of just copying the configuration text.
280 PH/10 Added the /noupdate option to the ratelimit ACL condition.
282 PH/11 Added $max_received_linelength.
284 PH/12 Added +ignore_defer and +include_defer to host lists.
286 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
287 way in which PCRE > 7.0 is built.
289 PH/14 Implemented queue_only_load_latch.
291 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
292 MAIL command. The effect was to mangle the value on 64-bit systems.
294 PH/16 Another patch from the Sieve maintainer.
296 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
298 PH/18 If a system quota error occurred while trying to create the file for
299 a maildir delivery, the message "Mailbox is full" was not appended to the
300 bounce if the delivery eventually timed out. Change 4.67/27 below applied
301 only to a quota excession during the actual writing of the file.
303 PH/19 It seems that peer DN values may contain newlines (and other non-printing
304 characters?) which causes problems in log lines. The DN values are now
305 passed through string_printing() before being added to log lines.
307 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
308 and InterBase are left for another time.)
310 PH/21 Added message_body_newlines option.
312 PH/22 Guard against possible overflow in moan_check_errorcopy().
314 PH/23 POSIX allows open() to be a macro; guard against that.
316 PH/24 If the recipient of an error message contained an @ in the local part
317 (suitably quoted, of course), incorrect values were put in $domain and
318 $local_part during the evaluation of errors_copy.
324 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
325 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
328 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
329 issue a MAIL command.
331 PH/02 In an ACL statement such as
333 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
335 if a client was not listed at all, or was listed with a value other than
336 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
337 the condition was not true (as it should be), so access was not denied.
338 The bug was that the ! inversion was incorrectly passed on to the second
339 item. This has been fixed.
341 PH/03 Added additional dnslists conditions == and =& which are different from
342 = and & when the dns lookup returns more than one IP address.
344 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
345 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
347 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
348 FSYNC, which compiles an option called disable_fsync that allows for
349 bypassing fsync(). The documentation is heavily laced with warnings.
351 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
353 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
354 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
355 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
356 including adding "make clean"; (3) Added -fPIC when compiling the test
357 dynamically loaded module, to get rid of a warning.
359 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
360 message fails, move_frozen_messages = true and ignore_bounce_errors_after
361 = 0s. The bug is otherwise harmless.
363 PH/07 There was a bug in the dovecot authenticator such that the value of
364 $auth1 could be overwritten, and so not correctly preserved, after a
365 successful authentication. This usually meant that the value preserved by
366 the server_setid option was incorrect.
368 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
370 PH/09 Installed PCRE release 7.0.
372 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
373 run for batched SMTP input. It is now run at the start of every message
374 in the batch. While fixing this I discovered that the process information
375 (output by running exiwhat) was not always getting set for -bs and -bS
376 input. This is fixed, and it now also says "batched" for BSMTP.
378 PH/11 Added control=no_pipelining.
380 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
381 patch, slightly modified), and move the expansion of helo_data till after
382 the connection is made in the smtp transport (so it can use these
385 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
387 PH/14 Added log_selector = +pid.
389 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
391 PH/16 Add ${if forany and ${if forall.
393 PH/17 Added dsn_from option to vary the From: line in DSNs.
395 PH/18 Flush SMTP output before performing a callout, unless control =
396 no_callout_flush is set.
398 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
399 was true (the default) a successful delivery failed to delete the retry
400 item, thus causing premature timeout of the address. The bug is now
403 PH/20 Added hosts_avoid_pipelining to the smtp transport.
405 PH/21 Long custom messages for fakedefer and fakereject are now split up
406 into multiline reponses in the same way that messages for "deny" and
407 other ACL rejections are.
409 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
410 with slight modification.
412 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
413 draft, changing the syntax and factoring some duplicate code".
415 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
416 for deliveries of the second and subsequent messages over the same SMTP
419 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
420 ${reduce, with only minor "tidies".
422 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
424 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
425 expansion side effects.
427 PH/27 When a message times out after an over-quota error from an Exim-imposed
428 quota, the bounce message says "mailbox is full". This message was not
429 being given when it was a system quota that was exceeded. It now should
432 MH/03 Made $recipients available in local_scan(). local_scan() already has
433 better access to the recipient list through recipients_list[], but
434 $recipients can be useful in postmaster-provided expansion strings.
436 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
437 in the case of a MAIL command with additional options following the
438 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
439 were accidentally chopped off.
441 PH/29 SMTP synchronization checks are implemented when a command is read -
442 there is a check that no more input is waiting when there shouldn't be
443 any. However, for some commands, a delay in an ACL can mean that it is
444 some time before the response is written. In this time, more input might
445 arrive, invalidly. So now there are extra checks after an ACL has run for
446 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
447 pipelining has not been advertised.
449 PH/30 MH's patch to allow iscntrl() characters to be list separators.
451 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
452 returned in the SMTP response when smtp_return_error_details was false.
455 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
456 instead of the C I/O that was originally supplied, because problems were
459 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
460 Exim which did not show up earlier: it was assuming that a call to
461 SSL_CTX_set_info_callback() might give an error value. In fact, there is
462 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
463 was a macro that became an assignment, so it seemed to work. This has
464 changed to a proper function call with a void return, hence the compile
465 error. Exim's code has been fixed.
467 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
470 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
472 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
474 PH/37 If a message is not accepted after it has had an id assigned (e.g.
475 because it turns out to be too big or there is a timeout) there is no
476 "Completed" line in the log. When some messages of this type were
477 selected by exigrep, they were listed as "not completed". Others were
478 picked up by some special patterns. I have improved the selection
479 criteria to be more general.
481 PH/38 The host_find_failed option in the manualroute router can now be set
482 to "ignore", to completely ignore a host whose IP address cannot be
483 found. If all hosts are ignored, the behaviour is controlled by the new
484 host_all_ignored option.
486 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
487 homing or because of multiple MX records with /mx) generated more than
488 one IP address, and the following item turned out to be the local host,
489 all the secondary addresses of the first item were incorrectly removed
490 from the list, along with the local host and any following hosts (which
491 is what is supposed to happen).
493 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
494 whoever called Exim into the -H file. In the case of the daemon it was
495 behaving confusingly. When first started, it used values for whoever
496 started the daemon, but after a SIGHUP it used the Exim user (because it
497 calls itself on a restart). I have changed the code so that it now always
500 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
501 message are rejected with the same error (e.g. no authentication or bad
502 sender address), and a DATA command is nevertheless sent (as can happen
503 with PIPELINING or a stupid MUA), the error message that was given to the
504 RCPT commands is included in the rejection of the DATA command. This is
505 intended to be helpful for MUAs that show only the final error to their
508 PH/42 Another patch from the Sieve maintainer.
510 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
511 Eximstats - Fixed some broken HTML links and added missing column headers
513 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
514 columns for Rejects, Temp Rejects, Ham, and Spam rows.
516 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
518 PH/43 Yet another patch from the Sieve maintainer.
520 PH/44 I found a way to check for a TCP/IP connection going away before sending
521 the response to the final '.' that terminates a message, but only in the
522 case where the client has not sent further data following the '.'
523 (unfortunately, this is allowed). However, in many cases there won't be
524 any further data because there won't be any more messages to send. A call
525 to select() can be used: if it shows that the input is "ready", there is
526 either input waiting, or the socket has been closed. An attempt to read
527 the next input character can distinguish the two cases. Previously, Exim
528 would have sent an OK response which the client would never have see.
529 This could lead to message repetition. This fix should cure that, at
530 least in a lot of common cases.
532 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
533 advertised in response to EHLO.
539 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
540 fixed by 4.65/MH/01 (is this a record?) are fixed:
542 (i) An empty string was always treated as zero by the numeric comparison
543 operators. This behaviour has been restored.
545 (ii) It is documented that the numeric comparison operators always treat
546 their arguments as decimal numbers. This was broken in that numbers
547 starting with 0 were being interpreted as octal.
549 While fixing these problems I realized that there was another issue that
550 hadn't been noticed. Values of message_size_limit (both the global option
551 and the transport option) were treated as octal if they started with 0.
552 The documentation was vague. These values are now always treated as
553 decimal, and I will make that clear in the documentation.
559 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
560 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
563 MH/01 Don't check that the operands of numeric comparison operators are
564 integers when their expansion is in "skipping" mode (fixes bug
565 introduced by 4.64-PH/07).
567 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
568 child addresses, Exim now panics and dies. Previously, because the count
569 is held in a short int, deliveries were likely to be lost. As such a
570 large number of recipients for a single message is ridiculous
571 (performance will be very, very poor), I have chosen to impose a limit
572 rather than extend the field.
578 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
579 leftover -K file (the existence of which was triggered by #402).
580 While we were at it, introduced process PID as part of the -K
581 filename. This should rule out race conditions when creating
584 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
585 processing considerably. Previous code took too long for large mails,
586 triggering a timeout which in turn triggers #401.
588 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
589 in the DK code in transports.c. sendfile() is not really portable,
590 hence the _LINUX specificness.
592 TF/01 In the add_headers option to the mail command in an Exim filter,
593 there was a bug that Exim would claim a syntax error in any
594 header after the first one which had an odd number of characters
597 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
598 callout verification, Exim cached a "reject" for the entire domain. This
599 is correct for most verifications, but it is not correct for a recipient
600 verification with use_sender or use_postmaster set, because in that case
601 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
602 case of MAIL FROM:<> rejection from other early rejections (e.g.
603 rejection of HELO). When verifying a recipient using a non-null MAIL
604 address, the cache is ignored if it shows MAIL FROM:<> rejection.
605 Whatever the result of the callout, the value of the domain cache is
606 left unchanged (for any other kind of callout, getting as far as trying
607 RCPT means that the domain itself is ok).
609 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
612 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
613 manifest itself as EPIPE rather than ECONNECT. When tidying away a
614 session, the daemon ignores ECONNECT errors and logs others; it now
615 ignores EPIPE as well.
617 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
618 (quoted-printable decoding).
620 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
621 later the small subsequent patch to fix an introduced bug.
623 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
625 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
627 PH/08 An error is now given if message_size_limit is specified negative.
629 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
630 to be given (somewhat) arbitrary names.
632 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
635 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
636 miscellaneous code fixes
638 PH/10 Added the log_reject_target ACL modifier to specify where to log
641 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
642 hostname. This is wrong, because it relates to the incoming message (and
643 probably the interface on which it is arriving) and not to the outgoing
644 callout (which could be using a different interface). This has been
645 changed to use the value of the helo_data option from the smtp transport
646 instead - this is what is used when a message is actually being sent. If
647 there is no remote transport (possible with a router that sets up host
648 addresses), $smtp_active_hostname is used.
650 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
651 tweaks were necessary in order to get it to work (see also 21 below):
652 (a) The code assumed that strncpy() returns a negative number on buffer
653 overflow, which isn't the case. Replaced with Exim's string_format()
655 (b) There were several signed/unsigned issues. I just did the minimum
656 hacking in of casts. There is scope for a larger refactoring.
657 (c) The code used strcasecmp() which is not a standard C function.
658 Replaced with Exim's strcmpic() function.
659 (d) The code set only $1; it now sets $auth1 as well.
660 (e) A simple test gave the error "authentication client didn't specify
661 service in request". It would seem that Dovecot has changed its
662 interface. Fortunately there's a specification; I followed it and
663 changed what the client sends and it appears to be working now.
665 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
668 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
669 address A is aliased to B and C, where B exists and C does not. Without
670 -v the output is "A verified" because verification stops after a
671 successful redirection if more than one address is generated. However,
672 with -v the child addresses are also verified. Exim was outputting "A
673 failed to verify" and then showing the successful verification for C,
674 with its parentage. It now outputs "B failed to verify", showing B's
675 parentage before showing the successful verification of C.
677 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
678 look up a TXT record in a specific list after matching in a combined
681 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
682 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
683 they consult the DNS. I had assumed they would set it the way they
684 wanted; and indeed my experiments on Linux seem to show that in some
685 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
686 To be on the safe side, however, I have now made the interface to
687 host_find_byname() similar to host_find_bydns(), with an argument
688 containing the DNS resolver options. The host_find_byname() function now
689 sets these options at its start, just as host_find_bydns() does. The smtp
690 transport options dns_qualify_single and dns_search_parents are passed to
691 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
692 of host_find_byname() use the default settings of RES_DEFNAMES
693 (qualify_single) but not RES_DNSRCH (search_parents).
695 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
696 spool_read_header() do less string testing, by means of a preliminary
697 switch on the second character of optional "-foo" lines. (This is
698 overdue, caused by the large number of possibilities that now exist.
699 Originally there were few.) While I was there, I also converted the
700 str(n)cmp tests so they don't re-test the leading "-" and the first
701 character, in the hope this might squeeze out yet more improvement.
703 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
704 flag allowing group syntax was set by the header_syntax check but not
705 turned off, possible causing trouble later; (2) The flag was not being
706 set at all for the header_verify test, causing "group"-style headers to
707 be rejected. I have now set it in this case, and also caused header_
708 verify to ignore an empty address taken from a group. While doing this, I
709 came across some other cases where the code for allowing group syntax
710 while scanning a header line wasn't quite right (mostly, not resetting
711 the flag correctly in the right place). These bugs could have caused
712 trouble for malformed header lines. I hope it is now all correct.
714 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
715 with the "reply" argument non-NULL. The code, however (which originally
716 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
717 but it didn't always do it. This confused somebody who was copying the
718 code for some other use. I have removed all the tests.
720 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
721 feature that was used to support insecure browsers during the U.S. crypto
722 embargo. It requires special client support, and Exim is probably the
723 only MTA that supported it -- and would never use it because real RSA is
724 always available. This code has been removed, because it had the bad
725 effect of slowing Exim down by computing (never used) parameters for the
726 RSA_EXPORT functionality.
728 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
729 authenticator to fail if there's a tab character in the incoming data
730 (there should never be unless someone is messing about, as it's supposed
731 to be base64-encoded). Also added, on Timo's advice, the "secured" option
732 if the connection is using TLS or if the remote IP is the same as the
733 local IP, and the "valid-client-cert option" if a client certificate has
736 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
737 authenticators. This can be used for authorization after authentication
738 succeeds. (In the case of plaintext, it servers for both authentication
741 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
742 if any retry times were supplied.
744 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
745 connection, where there is no client IP address to check. In this
746 situation, the verify now always succeeds.
748 PH/25 Applied John Jetmore's -Mset patch.
750 PH/26 Added -bem to be like -Mset, but loading a message from a file.
752 PH/27 In a string expansion for a processed (not raw) header when multiple
753 headers of the same name were present, leading whitespace was being
754 removed from all of them, but trailing whitespace was being removed only
755 from the last one. Now trailing whitespace is removed from each header
756 before concatenation. Completely empty headers in a concatenation (as
759 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
760 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
762 PH/29 [Removed. This was a change that I later backed out, and forgot to
763 correct the ChangeLog entry (that I had efficiently created) before
764 committing the later change.]
766 PH/30 Exim was sometimes attempting to deliver messages that had suffered
767 address errors (4xx response to RCPT) over the same connection as other
768 messages routed to the same hosts. Such deliveries are always "forced",
769 so retry times are not inspected. This resulted in far too many retries
770 for the affected addresses. The effect occurred only when there were more
771 hosts than the hosts_max_try setting in the smtp transport when it had
772 the 4xx errors. Those hosts that it had tried were not added to the list
773 of hosts for which the message was waiting, so if all were tried, there
774 was no problem. Two fixes have been applied:
776 (i) If there are any address or message errors in an SMTP delivery, none
777 of the hosts (tried or untried) are now added to the list of hosts
778 for which the message is waiting, so the message should not be a
779 candidate for sending over the same connection that was used for a
780 successful delivery of some other message. This seems entirely
781 reasonable: after all the message is NOT "waiting for some host".
782 This is so "obvious" that I'm not sure why it wasn't done
783 previously. Hope I haven't missed anything, but it can't do any
784 harm, as the worst effect is to miss an optimization.
786 (ii) If, despite (i), such a delivery is accidentally attempted, the
787 routing retry time is respected, so at least it doesn't keep
788 hammering the server.
790 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
791 in ${readsocket because some servers need this prod.
793 PH/32 Added some extra debug output when updating a wait-xxx database.
795 PH/33 The hint "could be header name not terminated by colon", which has been
796 given for certain expansion errors for a long time, was not being given
797 for the ${if def:h_colon_omitted{... case.
799 PH/34 The spec says: "With one important exception, whenever a domain list is
800 being scanned, $domain contains the subject domain." There was at least
801 one case where this was not true.
803 PH/35 The error "getsockname() failed: connection reset by peer" was being
804 written to the panic log as well as the main log, but it isn't really
805 panic-worthy as it just means the connection died rather early on. I have
806 removed the panic log writing for the ECONNRESET error when getsockname()
809 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
810 runs only) independently of the message's sender address. This meant
811 that, if the 4xx error was in fact related to the sender, a different
812 message to the same recipient with a different sender could confuse
813 things. In particualar, this can happen when sending to a greylisting
814 server, but other circumstances could also provoke similar problems.
815 I have changed the default so that the retry time for these errors is now
816 based a combination of the sender and recipient addresses. This change
817 can be overridden by setting address_retry_include_sender=false in the
820 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
821 remote server are returned as part of bounce messages. This was not
822 happening for LMTP over a pipe (the lmtp transport), but now it is the
823 same for both kinds of LMTP.
825 PH/38 Despite being documented as not happening, Exim was rewriting addresses
826 in header lines that were in fact CNAMEs. This is no longer the case.
828 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
829 and queue runs started by the daemon processed all messages. This has
830 been fixed so that -R and -S can now usefully be given with -q<time>.
832 PH/40 Import PCRE release 6.7 (fixes some bugs).
834 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
836 PH/42 Give an error if -q is specified more than once.
838 PH/43 Renamed the variables $interface_address and $interface_port as
839 $received_ip_address and $received_port, to make it clear that these
840 values apply to message reception, and not to the outgoing interface when
841 a message is delivered. (The old names remain recognized, of course.)
843 PH/44 There was no timeout on the connect() call when using a Unix domain
844 socket in the ${readsocket expansion. There now is.
846 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
847 be meaningful with "accept".
849 SC/01 Eximstats V1.43
850 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
852 SC/02 Eximstats V1.44
853 Use a glob alias rather than an array ref in the generated
854 parser. This improves both readability and performance.
856 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
857 Collect SpamAssassin and rejection statistics.
858 Don't display local sender or destination tables unless
859 there is data to show.
860 Added average volumes into the top table text output.
862 SC/04 Eximstats V1.46
863 Collect data on the number of addresses (recipients)
864 as well as the number of messages.
866 SC/05 Eximstats V1.47
867 Added 'Message too big' to the list of mail rejection
868 reasons (thanks to Marco Gaiarin).
870 SC/06 Eximstats V1.48
871 Mainlog lines which have GMT offsets and are too short to
872 have a flag are now skipped.
874 SC/07 Eximstats V1.49 (Alain Williams)
875 Added the -emptyok flag.
877 SC/08 Eximstats V1.50
878 Fixes for obtaining the IP address from reject messages.
880 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
881 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
882 whitesspace changes from 4.64-PH/27
884 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
887 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
888 are found, allow negative numbers in numeric criteria)
890 JJ/06 exipick.20061117.2, added new $message_body_missing variable
892 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
893 to match changes made in 4.64-PH/43
895 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
897 PH/47 Put in an explicit test for a DNS lookup of an address record where the
898 "domain" is actually an IP address, and force a failure. This locks out
899 those revolvers/nameservers that support "A-for-A" lookups, in
900 contravention of the specifications.
902 PH/48 When a host name was looked up from an IP address, and the subsequent
903 forward lookup of the name timed out, the host name was left in
904 $sender_host_name, contrary to the specification.
906 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
907 restricted to single-key lookups, Exim was not diagnosing an error if
908 * or *@ was used with a query-style lookup.
910 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
912 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
913 long ago, but noone interested enough thought of it. Let's just say that
914 the "1.1" means that there are some new functions that weren't there at
915 some point in the past.
917 PH/51 Error processing for expansion failure of helo_data from an smtp
918 transport during callout processing was broken.
920 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
921 tested/used via the -bh/-bhc/-bs options.
923 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
924 bug, fixed in subsequent PCRE releases).
926 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
927 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
929 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
935 SC/01 Use a glob alias rather than an array ref in eximstats generated
936 parser. This improves both readability and performance.
938 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
939 Don't display local sender or destination tables in eximstats unless
940 there is data to show.
941 Added average volumes into the eximstats top table text output.
943 SC/03 Collect data on the number of addresses (recipients) as well
944 as the number of messages in eximstats.
946 TF/01 Correct an error in the documentation for the redirect router. Exim
947 does (usually) call initgroups() when daemonizing.
949 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
950 with consistent privilege compared to when running as a daemon.
952 TF/03 Note in the spec that $authenticated_id is not set for local
953 submissions from trusted users.
955 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
956 Thanks to Dean Brooks <dean@iglou.com> for the patch.
958 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
959 by adding some example configuration directives to the default
960 configuration file. A little bit of work is required to uncomment the
961 directives and define how usernames and passwords are checked, but
962 there is now a framework to start from.
964 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
965 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
966 without this. I don't know how relevant this is to other LDAP libraries.
968 PH/02 Add the verb name to the "unknown ACL verb" error.
970 PH/03 Magnus Holmgren's patch for filter_prepend_home.
972 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
974 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
975 directory not expanded when it should be if an expanded home directory
976 was set for the address (which is overridden by the transport).
978 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
981 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
982 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
983 because it is too late at that time, and has no effect.
985 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
986 security issue with \' (bugzilla #107). I could not use the
987 PQescapeStringConn() function, because it needs a PGconn value as one of
990 PH/08 When testing addresses using -bt, indicate those final addresses that
991 are duplicates that would not cause an additional delivery. At least one
992 person was confused, thinking that -bt output corresponded to deliveries.
993 (Suppressing duplicates isn't a good idea as you lose the information
994 about possibly different redirections that led to the duplicates.)
996 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
997 systems where poll() doesn't work, in particular OS X.
999 PH/10 Added more information to debugging output for retry time not reached.
1001 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1002 operations in malware.c.
1004 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1007 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1008 syslog_duplication set false, log lines that would normally be written
1009 both the the main log and to the reject log were not written to syslog at
1012 PH/14 In the default configuration, change the use of "message" in ACL warn
1013 statements to "add_header".
1015 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1016 not followed by a command (e.g. "seen endif").
1018 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1019 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1022 PH/17 Added extra conditions to the default value of delay_warning_condition
1026 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1027 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1028 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1031 The Auto-Submitted: and various List- headers are standardised, whereas I
1032 don't think Precedence: ever was.
1034 PH/18 Refactored debugging code in route_finduser() to show more information,
1035 in particular, the error code if getpwnam() issues one.
1037 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1038 This is apparently needed in addition to the PH/07 change above to avoid
1039 any possible encoding problems.
1041 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1042 but not after initializing Perl.
1044 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1045 output them only if debugging. By default they are written stderr,
1046 apparently, which is not desirable.
1048 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1051 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1054 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1056 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1057 authenticated or an ident call has been made. Suppress the default
1058 values for $authenticated_id and $authenticated_sender (but permit -oMai
1059 and -oMas) when testing with -bh.
1061 PH/24 Re-jigged the order of the tests in the default configuration so that the
1062 tests for valid domains and recipients precede the DNS black list and CSA
1063 tests, on the grounds that those ones are more expensive.
1065 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1066 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1067 This bug exists in every version of Exim that I still have, right back to
1070 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1071 However, an attempt to turn on case-sensitivity in a regex key by
1072 including (?-i) didn't work because the subject string was already
1073 lowercased, and the effects were non-intuitive. It turns out that a
1074 one-line patch can be used to allow (?-i) to work as expected.
1080 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1081 other effects) broke the use of negated acl sub-conditions.
1083 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1086 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1087 "Deny" causes Exim to reject the incoming connection with a 554 error.
1088 Unfortunately, if there is a major crisis, such as a disk failure,
1089 tcp-wrappers gives "deny", whereas what one would like would be some
1090 kind of temporary error. A kludge has been added to help with this.
1091 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1092 554 error is used if errno is still zero or contains ENOENT (which occurs
1093 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1096 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1098 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1099 errors. Otherwise a message that provokes a temporary error (when other
1100 messages do not) can cause a whole host to time out.
1102 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1103 addresses were routed directly to files or pipes from a redirect router.
1104 File deliveries just didn't batch; pipe deliveries might have suffered
1107 PH/06 A failure to get a lock for a hints database would erroneously always say
1108 "Failed to get write lock", even when it was really a read lock.
1110 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1111 of 0600. This has been changed to use the value of the lockfile_mode
1112 option (which defaults to 0600).
1114 PH/08 Applied small patch from the Sieve maintainer.
1116 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1117 folder from quota calculations, a direct delivery into this folder messed
1118 up the contents of the maildirsize file. This was because the regex was
1119 used only to exclude .Trash (or whatever) when the size of the mailbox
1120 was calculated. There was no check that a delivery was happening into an
1121 excluded directory. This bug has been fixed by ignoring all quota
1122 processing for deliveries into excluded directories.
1124 PH/10 Added the maildirfolder_create_regex option to appendfile.
1130 PH/01 The code for finding all the local interface addresses on a FreeBSD
1131 system running IPv6 was broken. This may well have applied to all BSD
1132 systems, as well as to others that have similar system calls. The broken
1133 code found IPv4 interfaces correctly, but gave incorrect values for the
1134 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1135 that it would not match correctly against @[] and not recognize the IPv6
1138 PH/02 The ipliteral router was not recognizing addresses of the form user@
1139 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1141 PH/03 Added disable_ipv6.
1143 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1144 decoded form, because it is most often used to construct To: headers
1145 lines in autoreplies, and the decoded form may well be syntactically
1146 invalid. However, $reply_address has leading white space removed, and all
1147 newlines turned into spaces so that the autoreply transport does not
1150 PH/05 If group was specified without a user on a router, and no group or user
1151 was specified on a transport, the group from the router was ignored.
1153 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1154 for visible compile-time settings that can be used to change these
1155 numbers, for those that want even more. Backwards compatibility with old
1156 spool files has been maintained. However, going back to a previous Exim
1157 release will lost any variables that are in spool files.
1159 PH/07 Two small changes when running in the test harness: increase delay when
1160 passing a TCP/IP connection to a new process, in case the original
1161 process has to generate a bounce, and remove special handling of
1162 127.0.0.2 (sic), which is no longer necessary.
1164 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1165 be the same on different OS.
1167 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1170 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1171 whether --show-vars was specified or not
1173 JJ/02 exipick: Added support for new ACL variable spool format introduced
1176 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1177 syntactically invalid From: or Reply-to: line, and a filter used this to
1178 generate an autoreply, and therefore failed to obtain an address for the
1179 autoreply, Exim could try to deliver to a non-existent relative file
1180 name, causing unrelated and misleading errors. What now happens is that
1181 it logs this as a hard delivery error, but does not attempt to create a
1184 PH/11 The exinext utility has a -C option for testing purposes, but although
1185 the given file was scanned by exinext itself; it wasn't being passed on
1186 when Exim was called.
1188 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1189 an end-of-file indication when reading a command response.
1191 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1192 compiled. In many other places in Exim, IPv6 addresses are always
1193 recognized, so I have changed this. It also means that IPv4 domain
1194 literals of the form [IPV4:n.n.n.n] are now always recognized.
1196 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1197 used if the router is not running as root, for example, when verifying at
1198 ACL time, or when using -bh. The debugging output from this situation was
1199 non-existent - all you got was a failure to exec. I have made two
1202 (a) Failures to set uid/gid, the current directory, or a process leader
1203 in a subprocess such as that created by queryprogram now generate
1204 suitable debugging ouput when -d is set.
1206 (b) The queryprogram router detects when it is not running as root,
1207 outputs suitable debugging information if -d is set, and then runs
1208 the subprocess without attempting to change uid/gid.
1210 PH/15 Minor change to Makefile for building test_host (undocumented testing
1213 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1214 additional section of a DNS packet that returns MX or SRV records.
1215 Instead, it always explicitly searches for A/AAAA records. This avoids
1216 major problems that occur when a DNS server includes only records of one
1217 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1218 fixed another bug: if SRV records were looked up and the corresponding
1219 address records were *not* found in the additional section, the port
1220 values from the SRV records were lost.
1222 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1223 using the correct key (the original address) when searching the retry
1224 rules in order to find which one to use for generating the retry hint.
1226 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1227 adding the default one. Similarly, if it contains a Reply-To: header, the
1228 errors_reply_to option, if set, is not used.
1230 PH/19 When calculating a retry time, Exim used to measure the "time since
1231 failure" by looking at the "first failed" field in the retry record. Now
1232 it does not use this if it is later than than the arrival time of the
1233 message. Instead it uses the arrival time. This makes for better
1234 behaviour in cases where some deliveries succeed, thus re-setting the
1235 "first failed" field. An example is a quota failure for a huge message
1236 when small messages continue to be delivered. Without this change, the
1237 "time since failure" will always be short, possible causing more frequent
1238 delivery attempts for the huge message than are intended.
1239 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1241 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1242 $1, $2, $3) because the numerical variables can be reset during some
1243 expansion items (e.g. "match"), thereby losing the authentication data.
1245 PH/21 Make -bV show the size of off_t variables so that the test suite can
1246 decide whether to run tests for quotas > 2G.
1248 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1249 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1250 filecount value is greater than 2G or if a quota value is greater than 2G
1251 on a system where the size of off_t is not greater than 4, a panic error
1254 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1255 never match. The debug and -bh output now contains an explicit error
1256 message indicating a malformed IPv4 address or mask.
1258 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1259 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1260 PH/23 above applies.
1262 PH/25 Do not write to syslog when running in the test harness. The only
1263 occasion when this arises is a failure to open the main or panic logs
1264 (for which there is an explicit test).
1266 PH/26 Added the /no_tell option to "control=freeze".
1268 PH/27 If a host name lookup failed very early in a connection, for example, if
1269 the IP address matched host_lookup and the reverse lookup yielded a name
1270 that did not have a forward lookup, an error message of the form "no IP
1271 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1272 could be logged. Now it outputs the IP address instead of "NULL".
1274 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1275 allows the sender and the authenticated sender to be set when
1276 submitting a message from within Exim. Since child_open_exim() is
1277 documented for local_scan(), the new function should be too.
1279 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1280 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1281 results in an empty string is now treated as unset.
1283 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1285 PH/31 Added sender_verify_fail logging option.
1287 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1288 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1289 tidied the source and removed it altogether.
1291 PH/33 When a queue run was abandoned because the load average was too high, a
1292 log line was always written; now it is written only if the queue_run log
1293 selector is set. In addition, the log line for abandonment now contains
1294 information about the queue run such as the pid. This is always present
1295 in "start" and "stop" lines but was omitted from the "abandon" line.
1297 PH/34 Omit spaces between a header name and the colon in the error message that
1298 is given when verify = headers_syntax fails (if there are lots of them,
1299 the message gets confusing).
1301 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1302 names, as there are now some PTR records that contain slashes. This check
1303 is only to protect against broken name servers that fall over on strange
1304 characters, so the fact that it applies to all lookups doesn't matter.
1306 PH/36 Now that the new test suite is complete, we can remove some of the
1307 special code in Exim that was needed for the old test suite. For example,
1308 sorting DNS records because real resolvers return them in an arbitrary
1309 order. The new test suite's fake resolver always returns records in the
1312 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1313 bounces) except when queue_only is set, to avoid logging races between
1314 the different processes.
1316 PH/38 Panic-die if .include specifies a non-absolute path.
1318 PH/39 A tweak to the "H" retry rule from its user.
1320 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1321 a label. They prevented compilation on older perls.
1323 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1324 a warning to be raised on newish perls.
1326 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1327 on queue. Changes to match documented behaviour of showing count of
1328 messages matching specified criteria.
1330 PH/40 Changed the default ident timeout from 30s to 5s.
1332 PH/41 Added support for the use of login_cap features, on those BSD systems
1333 that have them, for controlling the resources used by pipe deliveries.
1335 PH/42 The content-scanning code uses fopen() to create files in which to put
1336 message data. Previously it was not paying any attention to the mode of
1337 the files. Exim runs with umask(0) because the rest of the code creates
1338 files with open(), and sets the required mode explicitly. Thus, these
1339 files were ending up world-writeable. This was not a big issue, because,
1340 being within the spool directory, they were not world-accessible. I have
1341 created a function called modefopen, which takes an additional mode
1342 argument. It sets umask(777), creates the file, chmods it to the required
1343 mode, then resets the umask. All the relevant calls to fopen() in the
1344 content scanning code have been changed to use this function.
1346 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1347 to 24 hours. This avoids potential overflow problems when processing G
1348 and H retry rules. I suspect nobody ever tinkers with this value.
1350 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1352 PH/45 When the plaintext authenticator is running as a client, the server's
1353 challenges are checked to ensure they are valid base64 strings. By
1354 default, the authentication attempt is cancelled if an invalid string is
1355 received. Setting client_ignore_invalid_base64 true ignores these errors.
1356 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1357 they are received. Thus, the responses can be made to depend on the
1358 challenges. If an invalid string is ignored, an empty string is placed in
1361 PH/46 Messages that are created by the autoreply transport now contains a
1362 References: header, in accordance with RFCs 2822 and 3834.
1364 PH/47 Added authenticated_sender_force to the smtp transport.
1366 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1368 PH/49 Installed latest patch from the Sieve maintainer.
1370 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1371 was also set, the appendfile transport was unnecessarily scanning a
1372 directory of message files (e.g. for maildir delivery) to find the count
1373 of files (along with the size), even though it did not need this
1374 information. It now does the scan only if it needs to find either the
1375 size of the count of files.
1377 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1379 PH/52 Two bugs concerned with error handling when the smtp transport is
1382 (i) Exim was not creating retry information for temporary errors given
1383 for individual recipients after the DATA command when the smtp transport
1384 was used in LMTP mode. This meant that they could be retried too
1385 frequently, and not timed out correctly.
1387 (ii) Exim was setting the flag that allows error details to be returned
1388 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1389 recipients that were returned after the DATA command.
1391 PH/53 This is related to PH/52, but is more general: for any failing address,
1392 when detailed error information was permitted to be returned to the
1393 sender, but the error was temporary, then after the final timeout, only
1394 "retry timeout exceeded" was returned. Now it returns the full error as
1395 well as "retry timeout exceeded".
1397 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1398 do this, and (what is worse) MTAs that accept it.
1400 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1401 will now be deprecated.
1403 PH/56 New os.c-cygwin from the Cygwin maintainer.
1405 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1406 formats (previously only available in exim formats via -bpr, -bpru,
1407 and -bpra. Now also available in native and exiqgrep formats)
1409 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1410 with very large, slow to parse queues
1412 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1414 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1416 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1417 responses to authentication challenges, though it was showing the
1418 challenges; (ii) I've removed the CR characters from the debug output for
1421 PH/58 Allow for the insertion of a newline as well as a space when a string
1422 is turned into more than one encoded-word during RFC 2047 encoding. The
1423 Sieve code now uses this.
1425 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1426 data_4xx, lost_connection, tls_required.
1428 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1429 message was being sent as an SMTP response.
1431 PH/61 Add -l and -k options to exicyclog.
1433 PH/62 When verifying, if an address was redirected to one new address, so that
1434 verification continued, and the new address failed or deferred after
1435 having set something in $address_data, the value of $address_data was not
1436 passed back to the ACL. This was different to the case when no
1437 redirection occurred. The value is now passed back in both cases.
1439 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1440 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1441 use login_cap.h, so on its own it isn't the distinguishing feature. The
1442 new name refers directly to the setclassresources() function.
1444 PH/65 Added configuration files for NetBSD3.
1446 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1448 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1449 is preferred over IPv4.
1451 PH/68 The bounce_return_message and bounce_return_body options were not being
1452 honoured for bounces generated during the reception of non-SMTP messages.
1453 In particular, this applied to messages rejected by the ACL. This bug has
1454 been fixed. However, if bounce_return_message is true and bounce_return_
1455 body is false, the headers that are returned for a non-SMTP message
1456 include only those that have been read before the error was detected.
1457 (In the case of an ACL rejection, they have all been read.)
1459 PH/69 The HTML version of the specification is now built in a directory called
1460 spec_html instead of spec.html, because the latter looks like a path with
1461 a MIME-type, and this confuses some software.
1463 PH/70 Catch two compiler warnings in sieve.c.
1465 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1466 function verify_get_ident() calls ip_connect() to connect a socket, but
1467 if the "connect()" function timed out, ip_connect() used to close the
1468 socket. However, verify_get_ident() also closes the socket later, and in
1469 between Exim writes to the log, which may get opened at this point. When
1470 the socket was closed in ip_connect(), the log could get the same file
1471 descriptor number as the socket. This naturally causes chaos. The fix is
1472 not to close the socket in ip_connect(); the socket should be closed by
1473 the function that creates it. There was only one place in the code where
1474 this was missing, in the iplookup router, which I don't think anybody now
1475 uses, but I've fixed it anyway.
1477 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1478 well as to direct DNS lookups. Otherwise the handling of names in host
1479 lists is inconsistent and therefore confusing.
1485 PH/01 Two changes to the default runtime configuration:
1487 (1) Move the checks for relay_from_hosts and authenticated clients from
1488 after to before the (commented out) DNS black list checks.
1490 (2) Add control=submission to the relay_from_hosts and authenticated
1491 clients checks, on the grounds that messages accepted by these
1492 statements are most likely to be submissions.
1494 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1496 (1) Generate an error if the third argument for the ${prvs expansion is
1499 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1502 (3) Reset the variables that are obtained from the first argument of
1503 ${prvscheck and used in the second argument before leaving the code,
1504 because their memory is reclaimed, so using them afterwards may do
1507 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1508 one (it's much easier than Tom thought :-).
1510 (5) Because of (4), we can now allow for the use of $prvscheck_result
1511 inside the third argument.
1513 PH/03 For some reason, the default setting of PATH when running a command from
1514 a pipe transport was just "/usr/bin". I have changed it to
1517 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1518 anything to be listed in the output from -bV.
1520 PH/05 When a filter generated an autoreply, the entire To: header line was
1521 quoted in the delivery log line, like this:
1523 => >A.N.Other <ano@some.domain> <original@ddress> ...
1525 This has been changed so that it extracts the operative address. There
1526 may be more than one such address. If so, they are comma-separated, like
1529 => >ano@some.domain,ona@other.domain <original@ddress> ...
1531 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1532 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1533 not being looked up in the rDNS to get a host name, Exim was showing the
1534 IP address twice in Received: lines, even though the IP addresses were
1535 identical. For example:
1537 Received: from [1.2.3.4] (helo=[1.2.3.4])
1539 However, if the real host name was known, it was omitting the HELO data
1540 if it matched the actual IP address. This has been tidied up so that it
1541 doesn't show the same IP address twice.
1543 PH/07 When both +timestamp and +memory debugging was on, the value given by
1544 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1545 called by the debug printing, thereby overwriting the timestamp buffer.
1546 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1548 PH/08 When the original message was included in an autoreply transport, it
1549 always said "this is a copy of the message, including all the headers",
1550 even if body_only or headers_only was set. It now gives an appropriate
1553 PH/09 Applied a patch from the Sieve maintainer which:
1555 o fixes some comments
1556 o adds the (disabled) notify extension core
1557 o adds some debug output for the result of if/elsif tests
1558 o points to the current vacation draft in the documentation
1559 and documents the missing references header update
1563 o fixes a bug in processing the envelope test (when testing
1564 multiple envelope elements, the last element determinted the
1567 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1568 Electronic Mail") by including:
1570 Auto-submitted: auto-generated
1572 in the messages that it generates (bounce messages and others, such as
1573 warnings). In the case of bounce messages for non-SMTP mesages, there was
1574 also a typo: it was using "Auto_submitted" (underscore instead of
1575 hyphen). Since every message generated by Exim is necessarily in response
1576 to another message, thes have all been changed to:
1578 Auto-Submitted: auto-replied
1580 in accordance with these statements in the RFC:
1582 The auto-replied keyword:
1584 - SHOULD be used on messages sent in direct response to another
1585 message by an automatic process,
1587 - MUST NOT be used on manually-generated messages,
1589 - MAY be used on Delivery Status Notifications (DSNs) and Message
1590 Disposition Notifications (MDNs),
1592 - MUST NOT be used on messages generated by automatic or periodic
1593 processes, except for messages which are automatic responses to
1596 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1597 to the default Received: header definition.
1599 PH/12 Added log selector acl_warn_skipped (default on).
1601 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1602 variables because (a) they are in the wrong storage pool and (b) even if
1603 they were copied, it wouldn't work properly because of the caching.
1605 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1606 checking when decoding. Apparently there are clients that generate
1607 overlong encoded strings. Why am I not surprised?
1609 PH/15 If the first argument of "${if match_address" was not empty, but did not
1610 contain an "@" character, Exim crashed. Now it writes a panic log message
1611 and treats the condition as false.
1613 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1615 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1616 extension "envelope-auth". The code is finished and in agreement with
1617 other implementations, but there is no documentation so far and in fact,
1618 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1619 not changing the active code.
1621 Print executed "if" and "elsif" statements when debugging is used. This
1622 helps a great deal to understand what a filter does.
1624 Document more things not specified clearly in RFC3028. I had all this
1625 sorted out, when out of a sudden new issues came to my mind. Oops."
1627 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1630 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1631 canonical form (as documented). However, after a host name lookup from
1632 the IP address, check_host() was doing a simple string comparison with
1633 addresses acquired from the DNS when checking that the found name did
1634 have the original IP as one of its addresses. Since any found IPv6
1635 addresses are likely to be in abbreviated form, the comparison could
1636 fail. Luckily, there already exists a function for doing the comparison
1637 by converting both addresses to binary, so now that is used instead of
1638 the text comparison.
1640 PH/20 There was another similar case to PH/19, when a complete host name was
1641 given in a host list; looking up its IP address could give an abbreviated
1642 form, whereas the current host's name might or might not be abbreviated.
1643 The same fix has been applied.
1649 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1650 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1653 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1654 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1656 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1658 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1659 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1660 Also, for "Auto-Submitted", treat anything other than "no" as
1661 non-personal, in accordance with RFC 3834. (Previously it treated
1662 anything starting "auto-" as non-personal.)
1664 TF/01 The control=submission/name=... option had a problem with syntax
1665 errors if the name included a slash character. The /name= option
1666 now slurps the rest of the string, so it can include any characters
1667 but it must come last in the list of options (after /sender_retain
1670 PH/05 Some modifications to the interface to the fake nameserver for the new
1678 TK/01 Added the "success_on_redirect" address verification option. See
1679 NewStuff for rationale and an example.
1681 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1683 PH/02 Patch to exigrep to allow it to work on syslog lines.
1685 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1686 fread() to skip over the body file's header line, because in Cygwin the
1687 header line is locked and is inaccessible.
1689 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1690 co-exist for some time) to make it clear that it is the Exim ID that is
1691 referenced, not the Message-ID: header line.
1693 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1694 string_format() function, because snprintf() does not exist on all
1697 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1698 ${stat: expansion item.
1700 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1701 protocol synchronization error", to keep the pedants happy.
1703 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1704 well as for IRIX systems, when gcc is being used. See the host.c source
1707 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1709 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1712 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1713 transport and to the smtp transport in LMTP mode.
1715 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1717 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1718 run a filter in a subprocess. This could lead to confusion in subsequent
1719 lookups in the parent process. There should also be a search_tidyup() at
1720 the end of the subprocess.
1722 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1723 only if the host matched helo_try_verify_hosts, which caused the
1724 verification to occur when the EHLO/HELO command was issued. The ACL just
1725 tested the remembered result. Now, if a previous verification attempt has
1726 not happened, "verify = helo" does it there and then.
1728 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1730 TK/03 Fix log output including CR from clamd.
1732 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1733 exist provoked a memory error which could cause a segfault.
1735 PH/15 Installed PCRE 6.2
1737 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1739 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1740 of the problem. Specifically, suggested +O2 rather than +O1 for the
1743 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1745 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1746 record, the port was not correctly logged when the outgoing_port log
1747 selector was set (it logged the transort's default port).
1749 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1750 fallback_hosts, and "hosts" in the smtp transport.
1752 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1753 host errors such as "Connection refused".
1755 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1756 authentication with radiusclient 0.4.9:
1758 - Error returned from rc_read_config was caught wrongly
1759 - Username/password not passed on to radius server due to wrong length.
1761 The presumption is that some radiusclient API changes for 4.51/PH/17
1762 were not taken care of correctly. The code is still untested by me (my
1763 Linux distribution still has 0.3.2 of radiusclient), but it was
1764 contributed by a Radius user.
1766 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1767 expanding the "port" option of the smtp transport.
1769 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1770 while reading a MIME header. Thanks to Tom Hughes for a patch.
1772 PH/24 Include config.h inside local_scan.h so that configuration settings are
1775 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1776 that in an ACL for RCPT (for example), you can examine exactly what was
1779 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1780 commands, but it was not correctly comparing the address with the actual
1781 client host address. Thus, it would show the EHLO address in Received:
1782 header lines when this was not necessary.
1784 PH/27 Added the % operator to ${eval:}.
1786 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1787 it should be ignoring failures (because with -C, for example, it has lost
1788 privilege). It wasn't ignoring creation failures other than "already
1791 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1794 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1795 because an input line was too long, either on its own, or by virtue of
1796 too many continuations, the temporary file was not being removed, and the
1797 return code was incorrect.
1799 PH/31 Missing "BOOL" in function definition in filtertest.c.
1801 PH/32 Applied Sieve patches from the maintainer.
1803 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1805 PH/33 Added "verify = not_blind".
1807 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1808 Local/Makefile (with some defaults set). These are used in built scripts
1809 such as exicyclog, but they have never been used in the exim_install
1810 script (though there are many overriding facilities there). I have
1811 arranged that the exim_install script now takes note of these two
1814 PH/35 Installed configuration files for Dragonfly.
1816 PH/36 When a locally submitted message by a trusted user did not contain a
1817 From: header, and the sender address was obtained from -f or from an SMTP
1818 MAIL command, and the trusted user did not use -F to supply a sender
1819 name, $originator_name was incorrectly used when constructing a From:
1820 header. Furthermore, $originator_name was used for submission mode
1821 messages from external hosts without From: headers in a similar way,
1822 which is clearly wrong.
1824 PH/37 Added control=suppress_local_fixups.
1826 PH/38 When log_selector = +received_sender was set, and the addition of the
1827 sender made the log line's construction buffer exactly full, or one byte
1828 less than full, an overflow happened when the terminating "\n" was
1831 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1832 when the result of a list match is failure because a DNS lookup failed.
1834 PH/40 RM_COMMAND is now used in the building process.
1836 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1837 the "build-* directories that it finds.
1839 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1840 address in a domain literal was a prefix of an interface address.
1842 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1843 when verifying a sender address, unless rewrite_headers is false.
1845 PH/44 Wrote a long comment about why errors_to addresses are verified as
1846 recipients, not senders.
1848 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1849 the ratelimit ACL was added.
1851 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1853 PH/46 Added extra information about PostgreSQL errors to the error string.
1855 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1856 avoiding the need to install special zones in a real server. This is
1857 backwards compatible; if it can't find the fake resolver, it drops back.
1858 Thus, both old and new test suites can be run.
1860 TF/02 Added util/ratelimit.pl
1862 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1863 clock is set back in time.
1865 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1866 Candler <B.Candler@pobox.com>.
1868 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1869 OK for addresses that are the result of redirections.
1871 PH/48 A number of further additions for the benefit of the new test suite,
1872 including a fake gethostbyname() that interfaces to the fake DNS resolver
1875 TF/06 The fix for widen_domains has also been applied to qualify_single and
1876 search_parents which are the other dnslookup options that can cause
1879 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1882 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1884 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1885 service" if it encountered an MX record with an empty target hostname.
1886 The message is now "an MX or SRV record indicated no SMTP service".
1888 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1889 if the DNS of the sending site is misconfigured. This is quite a
1890 common situation. This change restores the behaviour of treating a
1891 helo verification defer as a failure.
1893 PH/51 If self=fail was set on a router, the bounce message did not include the
1894 actual error message.
1900 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1902 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1903 command itself ended in error, the underlying message about the transport
1904 filter timeout was being overwritten with the pipe command error. Now the
1905 underlying error message should be appended to the second error message.
1907 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1909 PH/02 Reduce the amount of output that "make" produces by default. Full output
1910 can still be requested.
1912 PH/03 The warning log line about a condition test deferring for a "warn" verb
1913 was being output only once per connection, rather than after each
1914 occurrence (because it was using the same function as for successful
1915 "warn" verbs). This seems wrong, so I have changed it.
1917 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1918 it should not have, which might have caused a crash in the right
1919 circumstances, but probably never did.
1921 PH/04 Installed a modified version of Tony Finch's patch to make submission
1922 mode fix the return path as well as the Sender: header line, and to
1923 add a /name= option so that you can make the user's friendly name appear
1926 TF/03 Added the control = fakedefer ACL modifier.
1928 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1929 Mark Lowes for thorough testing.
1931 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1933 TK/03 Merged latest SRS patch from Miles Wilton.
1935 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1936 with the definition in sysexits.h (which is #included earlier).
1937 Fortunately, Exim does not actually use EX_OK. The code used to try to
1938 preserve the sysexits.h value, by assumimg that macro definitions were
1939 scanned for macro replacements. I have been disabused of this notion,
1940 so now the code just undefines EX_OK before #including unistd.h.
1942 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1943 in the smtp transport. When a block could not be written in a single
1944 write() function, the timeout was being re-applied to each part-write.
1945 This seems wrong - if the receiver was accepting one byte at a time it
1946 would take for ever. The timeout is now adjusted when this happens. It
1947 doesn't have to be particularly precise.
1949 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1950 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1952 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1953 without a domain if the check to <postmaster@domain> fails.
1955 SC/01 Eximstats: added -xls and the ability to specify output files
1956 (patch written by Frank Heydlauf).
1958 SC/02 Eximstats: use FileHandles for outputing results.
1960 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1962 SC/04 Eximstats: fixed display of large numbers with -nvr option
1964 SC/05 Eximstats: fixed merging of reports with empty tables.
1966 SC/06 Eximstats: added the -include_original_destination flag
1968 SC/07 Eximstats: removed tabs and trailing whitespace.
1970 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1972 TK/06 MBOX spool code: Add real "From " MBOX separator line
1973 so the .eml file is really in mbox format (even though
1974 most programs do not really care). Patch from Alex Miller.
1976 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1977 The latter is generated from $received_to and is only set if the
1978 message has one envelope recipient. SA can use these headers,
1979 obviously out-of-the-box. Patch from Alex Miller.
1981 PH/08 The ${def test on a variable was returning false if the variable's
1982 value was "0", contrary to what the specification has always said!
1983 The result should be true unless the variable is empty.
1985 PH/09 The syntax error of a character other than { following "${if
1986 def:variable_name" (after optional whitespace) was not being diagnosed.
1987 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1988 accidental colon was present, for example, could give incorrect results.
1990 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1991 result is used (not including appendfile, where other changes are about
1994 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1995 This involved changing a lot of size variables from int to off_t. It
1996 should work with maildirs and everything.
1998 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1999 spamd dying while we are connected to it.
2001 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2004 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2005 function for BDB 4.3.
2007 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2009 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2010 the sources for PCRE have been re-arranged and more files are now
2013 PH/15 The code I had for printing potentially long long variables in PH/11
2014 above was not the best (it lost precision). The length of off_t variables
2015 is now inspected at build time, and an appropriate printing format (%ld
2016 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2017 to be "long long int" or "long int". This is needed for the internal
2018 formatting function string_vformat().
2020 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2021 the configuration file to be ":syslog", then the script "guesses" where
2022 the logs files are, rather than using the compiled in default. In our
2023 case the guess is not the same as the compiled default, so the script
2024 suddenly stopped working when I started to use syslog. The patch checks
2025 to see if log_file_path is "". If so, it attempts to read it from exim
2026 with no configuration file to get the compiled in version, before it
2027 falls back to the previous guessing code."
2029 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2030 implementing BATV in an Exim configuration. See NewStuff for the gory
2033 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2034 Makefile that are specific to HP-UX.
2036 PH/18 If the "use_postmaster" option was set for a recipient callout together
2037 with the "random" option, the postmaster address was used as the MAIL
2038 FROM address for the random test, but not for the subsequent recipient
2039 test. It is now used for both.
2041 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2042 patch removes a few documentation additions to RFC 3028, because the
2043 latest draft now contains them. It adds the new en;ascii-case comparator
2044 and a new error check for 8bit text in MIME parts. Comparator and
2045 require names are now matched exactly. I enabled the subaddress
2046 extension, but it is not well tested yet (read: it works for me)."
2048 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2049 rework some of the code of TK/09 above to avoid the hardwired use of
2050 "%lld" and "long long". Replaced the call to snprintf() with a call to
2053 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2054 records point to non-existent hosts", "retry timeout exceeded", and
2055 "retry time not reached for any host after a long failure period".
2057 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2058 experimental DomainKeys support:
2060 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2061 (2) On an error such as an illegally used "control", the wrong name for
2062 the control was given.
2064 These problems did NOT occur unless DomainKeys support was compiled.
2066 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2068 PH/24 Added ${if match_ip condition.
2070 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2071 databases so that it will be absolutely obvious if a crash occurs in the
2072 DB library. This is a regular occurrence (often caused by mis-matched
2075 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2076 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2077 picked up on a user's system that detects such things. There doesn't seem
2078 to be a gcc warning option for this - only an attribute that has to be
2079 put on the function's prototype. It seems that in Fedora Core 4 they have
2080 set this on a number of new functions. No doubt there will be more in due
2083 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2084 specify a transport. However, if an address that was verified by such a
2085 router was the subject of a callout, Exim crashed because it tried to
2086 read the rcpt_include_affixes from the non-existent transport. Now it
2087 just assumes that the setting of that option is false. This bug was
2088 introduced by 4.51/PH/31.
2090 PH/28 Changed -d+all to exclude +memory, because that information is very
2091 rarely of interest, but it makes the output a lot bigger. People tend to
2092 do -d+all out of habit.
2094 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2095 code in os-type was giving problems when libc.so lives in lib64, like on
2098 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2099 aren't the modern standard, and it seems that some systems' include files
2100 don't always have them. Exim was already checking for some of the newer
2101 ones like T_AAAA, and defining it itself. I've added checks for all the
2102 record types that Exim uses.
2104 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2105 not automatically generating a new one, as it is supposed to. This
2106 prevented TLS from working. If the file did exist, but contained invalid
2107 data, a new version was generated, as expected. It was only the case of a
2108 non-existent file that was broken.
2110 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2111 with a change in libdomainkeys > 0.64.
2113 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2114 from DNS. If the selector record carries the flag, it now has
2115 precedence over the domain-wide flag.
2117 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2119 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2120 the use of a port name that isn't defined in /etc/services) occurred, the
2121 message was deferred as in a normal delivery, and thus remained on the
2122 spool, instead of being failed because of the mua_wrapper setting. This
2123 is now fixed, and I tidied up some of the mua_wrapper messages at the
2126 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2127 the messages in a hash of arrays rather than using individual hashes.
2128 This is a bit cleaner and results in dramatic memory savings, albeit
2129 at a slight CPU cost.
2131 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2132 as requested by Marc Sherman.
2134 SC/10 Eximstats: added histograms for user specified patterns as requested
2137 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2139 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2140 fopen() in the content-scanning modules that did not already have it.
2146 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2147 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2149 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2151 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2153 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2154 to test Sieve filters that use "vacation".
2156 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2157 that changes the way the GnuTLS parameters are stored in the cache file.
2158 The new format can be generated externally. For backward compatibility,
2159 if the data in the cache doesn't make sense, Exim assumes it has read an
2160 old-format file, and it generates new data and writes a new file. This
2161 means that you can't go back to an older release without removing the
2164 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2165 work if there are any delivery delays because "one_time" forces the
2166 parent to be marked "delivered", so its unseen clone is never tried
2167 again. For this reason, Exim now forbids the simultaneous setting of
2170 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2171 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2172 entry if you want to know the details. The fix, however, neglected to
2173 consider the case when local delivery batching is involved. The test for
2174 "previously delivered" was not happening when checking to see if an
2175 address could be batched with a previous (undelivered) one; under
2176 certain circumstances this could lead to multiple deliveries to the same
2179 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2180 in its include files, and this causes problems building Exim.
2182 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2183 header_syntax) but Exim was just ignoring anything given after a slash.
2184 In particular, this caused confusion with an attempt to use "verify =
2185 reverse_host_lookup/defer_ok". An error is now given when options are
2186 supplied for verify items that do not have them. (Maybe reverse_host_
2187 lookup should have a defer_ok option, but that's a different point.)
2189 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2190 defined by RFC 821) to 2048, because there were problems with some AUTH
2191 commands, and RFC 1869 says the size should be increased for extended
2192 SMTP commands that take arguments.
2194 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2197 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2198 "unknown" error; now it says that the functionality isn't in the binary.
2200 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2201 an address' error message when a string expansion fails (syntax or
2202 whatever). Otherwise the password may appear in the log. Following change
2203 PH/42 below, there is no longer a chance of it appearing in a bounce
2206 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2208 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2209 of its addresses was ever tried. (Bugzilla bug #2.)
2211 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2212 the result incorrectly in the debug output. (It correctly added a newline
2213 to what was transported.)
2215 TF/01 Added $received_time.
2217 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2218 commented out examples of how to interface to a virus scanner and to
2219 SpamAssassin. Also added commented examples of av_scanner and
2220 spamd_address settings.
2222 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2223 and controls are allowed in which ACLs. There were a couple of minor
2224 errors. Some of the entries in the conditions table (which is a table of
2225 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2226 negation of where the condition IS allowed.
2228 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2230 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2231 header file does not have a version number, so I've had to invent a new
2232 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2233 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2234 radiusclient), but it was contributed by a Radius user.
2236 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2237 files or directories, for OpenSSL.
2239 PH/19 When an Exim process that is running as root has to create an Exim log
2240 file, it does so in a subprocess that runs as exim:exim so as to get the
2241 ownership right at creation (otherwise, other Exim processes might see
2242 the file with the wrong ownership). There was no test for failure of this
2243 fork() call, which would lead to the process getting stuck as it waited
2244 for a non-existent subprocess. Forks do occasionally fail when resources
2245 run out. I reviewed all the other calls to fork(); they all seem to check
2248 PH/20 When checking for unexpected SMTP input at connect time (before writing
2249 the banner), Exim was not dealing correctly with a non-positive return
2250 from the read() function. If the client had disconnected by this time,
2251 the result was a log entry for a synchronization error with an empty
2252 string after "input=" when read() returned zero. If read() returned -1
2253 (an event I could not check), uninitialized data bytes were printed.
2254 There were reports of junk text (parts of files, etc) appearing after
2257 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2259 PH/22 Added support for macro redefinition, and (re)definition in between
2260 driver and ACL definitions.
2262 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2263 forgetting to use the resulting value; it was using the unexpanded value.
2265 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2266 hadn't been configured. The fix is from Juergen Kreileder, who
2267 understands it better than I do:
2269 "Here's what I see happening with three configured cyrus_sasl
2270 authenticators configured (plain, login, cram-md5):
2272 On startup auth_cyrus_sasl_init() gets called for each of these.
2273 This means three calls to sasl_listmech() without a specified mech_list.
2274 => SASL tests which mechs of all available mechs actually work
2275 => three warnings about OTP not working
2276 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2278 With the patch, sasl_listmech() also gets called three times. But now
2279 SASL's mech_list option is set to the server_mech specified in the the
2280 authenticator. Or in other words, the answer from sasl_listmech()
2281 gets limited to just the mech you're testing for (which is different
2283 => the return list contains just 'plain' or 'login', 'cram-md5' or
2284 nothing depending on the value of ob->server_mech.
2286 I've just tested the patch: Authentication still works fine,
2287 unavailable mechs specified in the exim configuration are still
2288 caught, and the auth.log warnings about OTP are gone."
2290 PH/25 When debugging is enabled, the contents of the command line are added
2291 to the debugging output, even when log_selector=+arguments is not
2294 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2295 answer is "GNU", and only if the return is "GNU/something" is the answer
2298 PH/27 $acl_verify_message is now set immediately after the failure of a
2299 verification in an ACL, and so is available in subsequent modifiers. In
2300 particular, the message can be preserved by coding like this:
2302 warn !verify = sender
2303 set acl_m0 = $acl_verify_message
2305 Previously, $acl_verify_message was set only while expanding "message"
2306 and "log_message" when a very denied access.
2308 PH/28 Modified OS/os.c-Linux with
2310 -#ifndef OS_LOAD_AVERAGE
2311 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2313 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2314 nomenclature these days.)
2316 PH/29 Installed patch from the Sieve maintainer that adds the options
2317 sieve_useraddress and sieve_subaddress to the redirect router.
2319 PH/30 In these circumstances:
2320 . Two addresses routed to the same list of hosts;
2321 . First host does not offer TLS;
2322 . First host accepts first address;
2323 . First host gives temporary error to second address;
2324 . Second host offers TLS and a TLS session is established;
2325 . Second host accepts second address.
2326 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2327 and peerdn, if requested) that were in fact used only for the second
2330 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2331 attention to any local part prefix or suffix that was matched by the
2332 router that accepted the address. It now behaves in the same way as it
2333 does for delivery: the affixes are removed from the local part unless
2334 rcpt_include_affixes is set on the transport.
2336 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2337 timeout during the DATA phase of an incoming message.
2339 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2340 applied a patch sanctioned by the Sieve maintainer.
2342 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2343 the uid or gid is negative. A case of a negative gid caused this to be
2344 noticed. The fix allows for either to be negative.
2346 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2347 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2350 PH/36 The change PH/12 above was broken. Fixed it.
2352 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2353 the grounds that routing the same address twice would always produce the
2354 same answer. This might have been true once, but it is certainly no
2355 longer true now. Routing a child address may depend on the previous
2356 routing that produced that child. Some complicated redirection strategies
2357 went wrong when messages had multiple recipients, and made Exim's
2358 behaviour dependent on the order in which the addresses were given.
2360 I have moved the duplicate checking until after the routing is complete.
2361 Exim scans the addresses that are assigned to local and remote
2362 transports, and removes any duplicates. This means that more work will be
2363 done, as duplicates will always all be routed, but duplicates are
2364 presumably rare, so I don't expect this is of any significance.
2366 For deliveries to pipes, files, and autoreplies, the duplicate checking
2367 still happens during the routing process, since they are not going to be
2370 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2371 It corrects a timeout issue with spamd. This is Ian's comment: "The
2372 background is that sometimes spamd either never reads data from a
2373 connection it has accepted, or it never writes response data. The exiscan
2374 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2375 blindly assumes that writes won't block so it may never time out."
2377 PH/39 Allow G after quota size as well as K and M.
2379 PH/40 The value set for $authenticated_id in an authenticator may not contain
2380 binary zeroes or newlines because the value is written to log lines and
2381 to spool files. There was no check on this. Now the value is run through
2382 the string_printing() function so that such characters are converted to
2383 printable escape sequences.
2385 PH/41 $message_linecount is a new variable that contains the total number of
2386 lines in the message. Compare $body_linecount, which is the count for the
2389 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2390 bounce and delay warning messages, except in certain special cases, which
2393 (a) An SMTP error message from a remote host;
2394 (b) A message specified in a :fail: redirection;
2395 (c) A message specified in a "fail" command in a system filter;
2396 (d) A message specified in a FAIL return from the queryprogram router;
2397 (e) A message specified by the cannot_route_message router option.
2399 In these cases only, Exim does include the error details in bounce and
2400 warning messages. There are also a few cases where bland messages such
2401 as "unrouteable address" or "local delivery error" are given.
2403 PH/43 $value is now also set for the "else" part of a ${run expansion.
2405 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2406 being worked on, but at least Exim now implements the latest version to
2409 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2410 process to complete was treated as a delivery failure, a timeout while
2411 writing the message to the pipe was logged, but erroneously treated as a
2412 successful delivery. Such timeouts include transport filter timeouts. For
2413 consistency with the overall process timeout, these timeouts are now
2414 treated as errors, giving rise to delivery failures by default. However,
2415 there is now a new Boolean option for the pipe transport called
2416 timeout_defer, which, if set TRUE, converts the failures into defers for
2417 both kinds of timeout. A transport filter timeout is now identified in
2420 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2421 systems where "make" and "gmake" are different, calling "gmake" at top
2422 level broke things. I've arranged for the value of $(MAKE) to be passed
2423 from the Makefile to this script so that it can call the same version of
2427 A note about Exim versions 4.44 and 4.50
2428 ----------------------------------------
2430 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2431 changes of various kinds. As a consequence, a big documentation update was
2432 needed. This delayed the release for rather longer than seemed good, especially
2433 in the light of a couple of (minor) security issues. Therefore, the changes
2434 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2435 release. So 4.44 and 4.50 are in effect two different branches that both start
2438 I have left the 4.50 change log unchanged; it contains all the changes since
2439 4.43. The change log for 4.44 is below; many of its items are identical to
2440 those for 4.50. This seems to be the most sensible way to preserve the
2441 historical information.
2447 1. Minor wording change to the doc/README.SIEVE file.
2449 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2450 computation of the current number of files was incorrect.
2452 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2453 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2456 4. Give more explanation in the error message when the command for a transport
2457 filter fails to execute.
2459 5. There are several places where Exim runs a non-Exim command in a
2460 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2461 was being done only for the command run by the queryprogram router. It is
2462 now done for all such subprocesses. The other cases are: ${run, transport
2463 filters, and the commands run by the lmtp and pipe transports.
2465 6. Added CONFIGURE_GROUP build-time option.
2467 7. Some older OS have a limit of 256 on the maximum number of file
2468 descriptors. Exim was using setrlimit() to set 1000 as a large value
2469 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2470 systems. I've change it so that if it can't get 1000, it tries for 256.
2472 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2473 was an oversight, and furthermore, ever since the addition of extra
2474 controls (e.g. 4.43/32), the checks on when to allow different forms of
2475 "control" were broken. There should now be diagnostics for all cases when a
2476 control that does not make sense is encountered.
2478 9. Added the /retain_sender option to "control=submission".
2480 10. $recipients is now available in the predata ACL (oversight).
2482 11. Tidy the search cache before the fork to do a delivery from a message
2483 received from the command line. Otherwise the child will trigger a lookup
2484 failure and thereby defer the delivery if it tries to use (for example) a
2485 cached ldap connection that the parent has called unbind on.
2487 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2488 of $address_data from the recipient verification was clobbered by the
2489 sender verification.
2491 13. The value of address_data from a sender verification is now available in
2492 $sender_address_data in subsequent conditions in the ACL statement.
2494 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2496 15. Added a new option "connect=<time>" to callout options, to set a different
2499 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2500 was its contents. (It was OK if the option was not defined at all.)
2502 17. A "Completed" log line is now written for messages that are removed from
2503 the spool by the -Mrm option.
2505 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2506 information about exactly what failed.
2508 19. Added -dd to debug only the daemon process.
2510 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2511 handles timeouts, both on the server side and network timeouts. Renamed the
2512 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2514 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2515 It is now set to "smtps".
2517 22. $host_address is now set to the target address during the checking of
2518 ignore_target_hosts.
2520 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2521 being passed; this would have caused $sender_host_name to have been used if
2522 matching the list had actually called for a host name (not very likely,
2523 since this list is usually IP addresses). A host name is now passed as
2526 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2527 code that specifies a non-restarting handler (typically sigaction() in
2528 modern systems) in an attempt to fix a rare and obscure crash bug.
2530 25. Narrowed the window for a race in the daemon that could cause it to ignore
2531 SIGCHLD signals. This is not a major problem, because they are used only to
2532 wake it up if nothing else does.
2534 26. A malformed maildirsize file could cause Exim to calculate negative values
2535 for the mailbox size or file count. Odd effects could occur as a result.
2536 The maildirsize information is now recalculated if the size or filecount
2539 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2540 support for a long time. Removed HAVE_SYS_VFS_H.
2542 28. Installed the latest version of exipick from John Jetmore.
2544 29. In an address list, if the pattern was not a regular expression, an empty
2545 subject address (from a bounce message) matched only if the pattern was an
2546 empty string. Non-empty patterns were not even tested. This was the wrong
2547 because it is perfectly reasonable to use an empty address as part of a
2548 database query. An empty address is now tested by patterns that are
2549 lookups. However, all the other forms of pattern expect the subject to
2550 contain a local part and a domain, and therefore, for them, an empty
2551 address still always fails if the pattern is not itself empty.
2553 30. Exim went into a mad DNS loop when attempting to do a callout where the
2554 host was specified on an smtp transport, and looking it up yielded more
2555 than one IP address.
2557 31. Re-factored the code for checking spool and log partition space into a
2558 function that finds that data and another that does the check. The former
2559 is then used to implement four new variables: $spool_space, $log_space,
2560 $spool_inodes, and $log_inodes.
2562 32. The RFC2047 encoding function was originally intended for short strings
2563 such as real names; it was not keeping to the 75-character limit for
2564 encoded words that the RFC imposes. It now respects the limit, and
2565 generates multiple encoded words if necessary. To be on the safe side, I
2566 have increased the buffer size for the ${rfc2047: expansion operator from
2569 33. It is now permitted to omit both strings after an "if" condition; if the
2570 condition is true, the result is "true". As before, when the second string
2571 is omitted, a false condition yields an empty string. This makes it less
2572 cumbersome to write custom ACL and router conditions.
2574 34. Failure to deliver a bounce message always caused it to be frozen, even if
2575 there was an errors_to setting on the router. The errors_to setting is now
2578 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2579 canonical form (fully expanded) before being placed in
2580 $sender_host_address.
2582 36. The table in the code that translates DNS record types into text (T_A to
2583 "A" for instance) was missing entries for NS and CNAME. It is just possible
2584 that this could have caused confusion if both these types were looked up
2585 for the same domain, because the text type is used as part of Exim's
2586 per-process caching. But the chance of anyone hitting this buglet seems
2589 37. The dnsdb lookup has been extended in a number of ways.
2591 (1) There is a new type, "zns", which walks up the domain tree until it
2592 finds some nameserver records. It should be used with care.
2594 (2) There is a new type, "mxh", which is like "mx" except that it returns
2595 just the host names, not the priorities.
2597 (3) It is now possible to give a list of domains (or IP addresses) to be
2598 looked up. The behaviour when one of the lookups defers can be
2599 controlled by a keyword.
2601 (4) It is now possible to specify the separator character for use when
2602 multiple records are returned.
2604 38. The dnslists ACL condition has been extended: it is now possible to supply
2605 a list of IP addresses and/or domains to be looked up in a particular DNS
2608 39. Added log_selector=+queue_time_overall.
2610 40. When running the queue in the test harness, wait just a tad after forking a
2611 delivery process, to get repeatability of debugging output.
2613 41. Include certificate and key file names in error message when GnuTLS fails
2614 to set them up, because the GnuTLS error message doesn't include the name
2615 of the failing file when there is a problem reading it.
2617 42. Allow both -bf and -bF in the same test run.
2619 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2621 44. The "Exiscan patch" is now merged into the mainline Exim source.
2623 45. Sometimes the final signoff response after QUIT could fail to get
2624 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2625 < 0 before doing a fflush(). This bug looks as though it goes back to the
2626 introduction of TLS in release 3.20, but "sometimes" must have been rare
2627 because the tests only now provoked it.
2629 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2630 (this can affect the format of dates).
2632 47. exim_tidydb, when checking for the continued existence of a message for
2633 which it has found a message-specific retry record, was not finding
2634 messages that were in split spool directories. Consequently, it was
2635 deleting retry records that should have stayed in existence.
2637 48. Steve fixed some bugs in eximstats.
2639 49. The SPA authentication driver was not abandoning authentication and moving
2640 on to the next authenticator when an expansion was forced to fail,
2641 contradicting the general specification for all authenticators. Instead it
2642 was generating a temporary error. It now behaves as specified.
2644 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2645 (the order specifies the preference for clients). The order is now AES256,
2646 AES128, 3DES, ARCFOUR128.
2648 51. Small patch to Sieve code - explicitly set From: when generating an
2651 52. Exim crashed if a remote delivery caused a very long error message to be
2652 recorded - for instance if somebody sent an entire SpamAssassin report back
2653 as a large number of 550 error lines. This bug was coincidentally fixed by
2654 increasing the size of one of Exim's internal buffers (big_buffer) that
2655 happened as part of the Exiscan merge. However, to be on the safe side, I
2656 have made the code more robust (and fixed the comments that describe what
2659 53. Now that there can be additional text after "Completed" in log lines (if
2660 the queue_time_overall log selector is set), a one-byte patch to exigrep
2661 was needed to allow it to recognize "Completed" as not the last thing in
2664 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2665 patch that reportedly fixes this has been added. I am not expert enough to
2666 create a test for it. This is what the patch creator wrote:
2668 "I found a little strange behaviour of ldap code when working with
2669 Windows 2003 AD Domain, where users was placed in more than one
2670 Organization Units. When I tried to give exim partial DN, the exit code
2671 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2672 But simultaneously result of request was absolutely normal ldap result,
2673 so I produce this patch..."
2675 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2676 REFERENCE, so I have modified the code to exclude the patch when that macro
2679 55. Some experimental protocols are using DNS PTR records for new purposes. The
2680 keys for these records are domain names, not reversed IP addresses. The
2681 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2682 leaves it alone. Component reversal etc. now happens only for IP addresses.
2685 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2687 57. Double the size of the debug message buffer (to 2048) so that more of very
2688 long debug lines gets shown.
2690 58. The exicyclog utility now does better if the number of log files to keep
2691 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2693 59. Two changes related to the smtp_active_hostname option:
2695 (1) $smtp_active_hostname is now available as a variable.
2696 (2) The default for smtp_banner uses $smtp_active_hostname instead
2697 of $primary_hostname.
2699 60. The host_aton() function is supposed to be passed a string that is known
2700 to be a valid IP address. However, in the case of IPv6 addresses, it was
2701 not checking this. This is a hostage to fortune. Exim now panics and dies
2702 if the condition is not met. A case was found where this could be provoked
2703 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2704 components; fortuitously, this particular loophole had already been fixed
2705 by change 4.50/55 above.
2707 If there are any other similar loopholes, the new check in host_aton()
2708 itself should stop them being exploited. The report I received stated that
2709 data on the command line could provoke the exploit when Exim was running as
2710 exim, but did not say which command line option was involved. All I could
2711 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2712 running as the user.
2715 61. There was a buffer overflow vulnerability in the SPA authentication code
2716 (which came originally from the Samba project). I have added a test to the
2717 spa_base64_to_bits() function which I hope fixes it.
2720 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2721 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2723 63. The daemon start-up calls getloadavg() while still root for those OS that
2724 need the first call to be done as root, but it missed one case: when
2725 deliver_queue_load_max is set with deliver_drop_privilege. This is
2726 necessary for the benefit of the queue runner, because there is no re-exec
2727 when deliver_drop_privilege is set.
2729 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2730 This has been fixed.
2732 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2733 was in use, was not putting the data itself into the right store pool;
2734 consequently, it could be overwritten for a subsequent message in the same
2735 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2738 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2740 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2741 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2742 the function were treating the return as a boolean value, which happened to
2743 work because 0=false and not-0=true, but is not correct code.
2745 68. The host_aton() function was not handling scoped IPv6 addresses (those
2746 with, for example, "%eth0" on the end) correctly.
2748 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2749 negated items (that is, ~something) in unsigned ints. Some compilers
2750 apparently mutter when there is no cast.
2752 70. If an address verification called from an ACL failed, and did not produce a
2753 user-specific message (i.e. there was only a "system" message), nothing was
2754 put in $acl_verify_message. In this situation, it now puts the system
2757 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2758 session; change 4.31/43 added the unwanted input to the log line - except
2759 that it did not do this in the start of session case. It now does.
2761 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2762 This is wrong and can cause the other end to generate a synchronization
2763 error if it is another Exim or anything else that does the synchronization
2764 check. A QUIT command is no longer sent after a timeout.
2766 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2767 during host lookups.
2769 74. The defer_ok option of callout verification was not working if it was used
2770 when verifying addresses in header lines, that is, for this case:
2772 verify = header_sender/callout=defer_ok
2774 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2775 those file descriptors could be used for SMTP connections. If anything
2776 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2777 could be sent to the SMTP client, causing chaos. The daemon now opens
2778 stdin, stdout, and stderr to /dev/null when it puts itself into the
2781 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2782 log by default. The user can override this with suitable Perl magic.
2784 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2785 the log message when discard triggers, was not working for the DATA ACL or
2786 for the non-SMTP ACL.
2788 78. Error message wording change in sieve.c.
2790 79. If smtp_accept_max_per_host was set, the number of connections could be
2791 restricted to fewer than expected, because the daemon was trying to set up
2792 a new connection before checking whether the processes handling previous
2793 connections had finished. The check for completed processes is now done
2794 earlier. On busy systems, this bug wouldn't be noticed because something
2795 else would have woken the daemon, and it would have reaped the completed
2798 80. If a message was submitted locally by a user whose login name contained one
2799 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2800 It caused a spool format error. I have fixed the spool reading code. A
2801 related problem was that the "from" clause in the Received: line became
2802 illegal because of the space(s). It is now covered by ${quote_local_part.
2804 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2807 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2809 83. Patch from Sieve maintainer to fix unterminated string problem in
2810 "vacation" handling.
2812 84. Some minor changes to the Linux configuration files to help with other
2813 OS variants using glibc.
2815 85. One more patch for Sieve to update vacation handling to latest spec.
2818 ----------------------------------------------------
2819 See the note above about the 4.44 and 4.50 releases.
2820 ----------------------------------------------------
2826 1. Change 4.43/35 introduced a bug that caused file counts to be
2827 incorrectly computed when quota_filecount was set in an appendfile
2830 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2831 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2834 3. Give more explanation in the error message when the command for a transport
2835 filter fails to execute.
2837 4. There are several places where Exim runs a non-Exim command in a
2838 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2839 was being done only for the command run by the queryprogram router. It is
2840 now done for all such subprocesses. The other cases are: ${run, transport
2841 filters, and the commands run by the lmtp and pipe transports.
2843 5. Some older OS have a limit of 256 on the maximum number of file
2844 descriptors. Exim was using setrlimit() to set 1000 as a large value
2845 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2846 systems. I've change it so that if it can't get 1000, it tries for 256.
2848 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2849 was an oversight, and furthermore, ever since the addition of extra
2850 controls (e.g. 4.43/32), the checks on when to allow different forms of
2851 "control" were broken. There should now be diagnostics for all cases when a
2852 control that does not make sense is encountered.
2854 7. $recipients is now available in the predata ACL (oversight).
2856 8. Tidy the search cache before the fork to do a delivery from a message
2857 received from the command line. Otherwise the child will trigger a lookup
2858 failure and thereby defer the delivery if it tries to use (for example) a
2859 cached ldap connection that the parent has called unbind on.
2861 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2862 of $address_data from the recipient verification was clobbered by the
2863 sender verification.
2865 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2866 was its contents. (It was OK if the option was not defined at all.)
2868 11. A "Completed" log line is now written for messages that are removed from
2869 the spool by the -Mrm option.
2871 12. $host_address is now set to the target address during the checking of
2872 ignore_target_hosts.
2874 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2875 being passed; this would have caused $sender_host_name to have been used if
2876 matching the list had actually called for a host name (not very likely,
2877 since this list is usually IP addresses). A host name is now passed as
2880 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2881 code that specifies a non-restarting handler (typically sigaction() in
2882 modern systems) in an attempt to fix a rare and obscure crash bug.
2884 15. Narrowed the window for a race in the daemon that could cause it to ignore
2885 SIGCHLD signals. This is not a major problem, because they are used only to
2886 wake it up if nothing else does.
2888 16. A malformed maildirsize file could cause Exim to calculate negative values
2889 for the mailbox size or file count. Odd effects could occur as a result.
2890 The maildirsize information is now recalculated if the size or filecount
2893 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2894 support for a long time. Removed HAVE_SYS_VFS_H.
2896 18. Updated exipick to current release from John Jetmore.
2898 19. Allow an empty sender to be matched against a lookup in an address list.
2899 Previously the only cases considered were a regular expression, or an
2902 20. Exim went into a mad DNS lookup loop when doing a callout where the
2903 host was specified on the transport, if the DNS lookup yielded more than
2906 21. The RFC2047 encoding function was originally intended for short strings
2907 such as real names; it was not keeping to the 75-character limit for
2908 encoded words that the RFC imposes. It now respects the limit, and
2909 generates multiple encoded words if necessary. To be on the safe side, I
2910 have increased the buffer size for the ${rfc2047: expansion operator from
2913 22. Failure to deliver a bounce message always caused it to be frozen, even if
2914 there was an errors_to setting on the router. The errors_to setting is now
2917 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2918 canonical form (fully expanded) before being placed in
2919 $sender_host_address.
2921 24. Updated eximstats to version 1.33
2923 25. Include certificate and key file names in error message when GnuTLS fails
2924 to set them up, because the GnuTLS error message doesn't include the name
2925 of the failing file when there is a problem reading it.
2927 26. Expand error message when OpenSSL has problems setting up cert/key files.
2930 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2931 (this can affect the format of dates).
2933 28. exim_tidydb, when checking for the continued existence of a message for
2934 which it has found a message-specific retry record, was not finding
2935 messages that were in split spool directories. Consequently, it was
2936 deleting retry records that should have stayed in existence.
2938 29. eximstats updated to version 1.35
2939 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2940 1.35 - bugfix such that pie charts by volume are generated correctly
2942 30. The SPA authentication driver was not abandoning authentication and moving
2943 on to the next authenticator when an expansion was forced to fail,
2944 contradicting the general specification for all authenticators. Instead it
2945 was generating a temporary error. It now behaves as specified.
2947 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2948 (the order specifies the preference for clients). The order is now AES256,
2949 AES128, 3DES, ARCFOUR128.
2951 31. Small patch to Sieve code - explicitly set From: when generating an
2954 32. Exim crashed if a remote delivery caused a very long error message to be
2955 recorded - for instance if somebody sent an entire SpamAssassin report back
2956 as a large number of 550 error lines. This bug was coincidentally fixed by
2957 increasing the size of one of Exim's internal buffers (big_buffer) that
2958 happened as part of the Exiscan merge. However, to be on the safe side, I
2959 have made the code more robust (and fixed the comments that describe what
2962 33. Some experimental protocols are using DNS PTR records for new purposes. The
2963 keys for these records are domain names, not reversed IP addresses. The
2964 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2965 leaves it alone. Component reversal etc. now happens only for IP addresses.
2968 34. The host_aton() function is supposed to be passed a string that is known
2969 to be a valid IP address. However, in the case of IPv6 addresses, it was
2970 not checking this. This is a hostage to fortune. Exim now panics and dies
2971 if the condition is not met. A case was found where this could be provoked
2972 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2973 components; fortuitously, this particular loophole had already been fixed
2974 by change 4.50/55 or 4.44/33 above.
2976 If there are any other similar loopholes, the new check in host_aton()
2977 itself should stop them being exploited. The report I received stated that
2978 data on the command line could provoke the exploit when Exim was running as
2979 exim, but did not say which command line option was involved. All I could
2980 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2981 running as the user.
2984 35. There was a buffer overflow vulnerability in the SPA authentication code
2985 (which came originally from the Samba project). I have added a test to the
2986 spa_base64_to_bits() function which I hope fixes it.
2989 36. The daemon start-up calls getloadavg() while still root for those OS that
2990 need the first call to be done as root, but it missed one case: when
2991 deliver_queue_load_max is set with deliver_drop_privilege. This is
2992 necessary for the benefit of the queue runner, because there is no re-exec
2993 when deliver_drop_privilege is set.
2995 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2996 was in use, was not putting the data itself into the right store pool;
2997 consequently, it could be overwritten for a subsequent message in the same
2998 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3001 38. Sometimes the final signoff response after QUIT could fail to get
3002 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3003 < 0 before doing a fflush(). This bug looks as though it goes back to the
3004 introduction of TLS in release 3.20, but "sometimes" must have been rare
3005 because the tests only now provoked it.
3011 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3012 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3013 Now it returns an integer. A number of calls were still expecting a T/F
3014 return. Fortuitously, in all cases, the tests worked in OK situations,
3015 which is the norm. However, things would have gone wrong on any write
3016 failures on the smtp file descriptor. This function is used when sending
3017 messages over SMTP and also when doing verify callouts.
3019 2. When Exim is called to do synchronous delivery of a locally submitted
3020 message (the -odf or -odi options), it no longer closes stderr before doing
3023 3. Implemented the mua_wrapper option.
3025 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3027 5. Implemented the functions header_remove(), header_testname(),
3028 header_add_at_position(), and receive_remove_recipient(), and exported them
3031 6. If an ACL "warn" statement specified the addition of headers, Exim already
3032 inserted X-ACL-Warn: at the start if there was no header name. However, it
3033 was not making this test for the second and subsequent header lines if
3034 there were newlines in the string. This meant that an invalid header could
3035 be inserted if Exim was badly configured.
3037 7. Allow an ACL "warn" statement to add header lines at the start or after all
3038 the Received: headers, as well as at the end.
3040 8. Added the rcpt_4xx retry error code.
3042 9. Added postmaster_mailfrom=xxx to callout verification option.
3044 10. Added mailfrom=xxxx to the callout verification option, for verify=
3047 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3048 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3050 12. Inserted some casts to stop certain compilers warning when using pointer
3051 differences as field lengths or precisions in printf-type calls (mostly
3052 affecting debugging statements).
3054 13. Added optional readline() support for -be (dynamically loaded).
3056 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3057 same clock tick as a message's arrival, so that its received time was the
3058 same as the "first fail" time on the retry record, and that message
3059 remained on the queue past the ultimate address timeout, every queue runner
3060 would try a delivery (because it was past the ultimate address timeout) but
3061 after another failure, the ultimate address timeout, which should have then
3062 bounced the address, did not kick in. This was a "< instead of <=" error;
3063 in most cases the first failure would have been in the next clock tick
3064 after the received time, and all would be well.
3066 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3067 being recognized when the domain list was tested by the match_domain
3068 condition in an expansion string.
3070 16. Added the ${str2b64: operator.
3072 17. Exim was always calling setrlimit() to set a large limit for the number of
3073 processes, without checking whether the existing limit was already
3074 adequate. (It did check for the limit on file descriptors.) Furthermore,
3075 errors from getrlimit() and setrlimit() were being ignored. Now they are
3076 logged to the main and panic logs, but Exim does carry on, to try to do its
3077 job under whatever limits there are.
3079 18. Imported PCRE 5.0.
3081 19. Trivial typo in log message " temporarily refused connection" (the leading
3084 20. If the log selector return_path_on_delivery was set and an address was
3085 redirected to /dev/null, the delivery process crashed because it assumed
3086 that a return path would always be set for a "successful" delivery. In this
3087 case, the whole delivery is bypassed as an optimization, and therefore no
3090 21. Internal re-arrangement: the function for sending a challenge and reading
3091 a response while authentication was assuming a zero-terminated challenge
3092 string. It's now changed to take a pointer and a length, to allow for
3093 binary data in such strings.
3095 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3097 23. Exim was not respecting finduser_retries when seeking the login of the
3098 uid under which it was called; it was always trying 10 times. (The default
3099 setting of finduser_retries is zero.) Also, it was sleeping after the final
3100 failure, which is pointless.
3102 24. Implemented tls_on_connect_ports.
3104 25. Implemented acl_smtp_predata.
3106 26. If the domain in control=submission is set empty, Exim assumes that the
3107 authenticated id is a complete email address when it generates From: or
3108 Sender: header lines.
3110 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3111 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3112 chown and chgrp in /bin and hostname in /usr/bin.
3114 28. Exim was keeping the "process log" file open after each use, just as it
3115 does for the main log. This opens the possibility of it remaining open for
3116 long periods when the USR1 signal hits a daemon. Occasional processlog
3117 errors were reported, that could have been caused by this. Anyway, it seems
3118 much more sensible not to leave this file open at all, so that is what now
3121 29. The long-running daemon process does not normally write to the log once it
3122 has entered its main loop, and it closes the log before doing so. This is
3123 so that log files can straightforwardly be renamed and moved. However,
3124 there are a couple of unusual error situations where the daemon does write
3125 log entries, and I had neglected to close the log afterwards.
3127 30. The text of an SMTP error response that was received during a remote
3128 delivery was being truncated at 512 bytes. This is too short for some of
3129 the long messages that one sometimes sees. I've increased the limit to
3132 31. It is now possible to make retry rules that apply only when a message has a
3133 specific sender, in particular, an empty sender.
3135 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3136 it possible to be selective about when SMTP synchronization is enforced.
3138 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3140 32. Implemented hosts_connection_nolog.
3142 33. Added an ACL for QUIT.
3144 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3147 35. Added mailbox_size and mailbox_filecount to appendfile.
3149 36. Added control = no_multiline_responses to ACLs.
3151 37. There was a bug in the logic of the code that waits for the clock to tick
3152 in the case where the clock went backwards by a substantial amount such
3153 that the microsecond fraction of "now" was more than the microsecond
3154 fraction of "then" (but the whole seconds number was less).
3156 38. Added support for the libradius Radius client library this is found on
3157 FreeBSD (previously only the radiusclient library was supported).
3163 1. When certain lookups returned multiple values in the form name=value, the
3164 quoting of the values was not always being done properly. Specifically:
3165 (a) If the value started with a double quote, but contained no whitespace,
3167 (b) If the value contained whitespace other than a space character (i.e.
3168 tabs or newlines or carriage returns) it was not quoted.
3169 This fix has been applied to the mysql and pgsql lookups by writing a
3170 separate quoting function and calling it from the lookup code. The fix
3171 should probably also be applied to nisplus, ibase and oracle lookups, but
3172 since I cannot test any of those, I have not disturbed their existing code.
3174 2. A hit in the callout cache for a specific address caused a log line with no
3175 reason for rejecting RCPT. Now it says "Previous (cached) callout
3176 verification failure".
3178 3. There was an off-by-one bug in the queryprogram router. An over-long
3179 return line was truncated at 256 instead of 255 characters, thereby
3180 overflowing its buffer with the terminating zero. As well as fixing this, I
3181 have increased the buffer size to 1024 (and made a note to document this).
3183 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3184 when Exim is waiting for an SMTP response from a remote server, Exim
3185 restarts its select() call on the socket, thereby resetting its timeout.
3186 This is not a problem when such interrupts are rare. Somebody set up a cron
3187 job to run exiwhat every 2 minutes, which is less than the normal select()
3188 timeout (5 or 10 minutes). This meant that the select() timeout never
3189 kicked in because it was always reset. I have fixed this by comparing the
3190 time when an interrupt arrives with the time at the start of the first call
3191 to select(). If more time than the timeout has elapsed, the interrupt is
3192 treated as a timeout.
3194 5. Some internal re-factoring in preparation for the addition of Sieve
3195 extensions (by MH). In particular, the "personal" test is moved to a
3196 separate function, and given an option for scanning Cc: and Bcc: (which is
3197 not set for Exim filters).
3199 6. When Exim created an email address using the login of the caller as the
3200 local part (e.g. when creating a From: or Sender: header line), it was not
3201 quoting the local part when it contained special characters such as @.
3203 7. Installed new OpenBSD configuration files.
3205 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3206 try to make them clearer.
3208 9. Callout options, other than the timeout value, were being ignored when
3209 verifying sender addresses in header lines. For example, when using
3211 verify = header_sender/callout=no_cache
3213 the cache was (incorrectly) being used.
3215 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3216 only the Cygwin environment.
3218 11. When return_path_on_delivery was set as a log selector, if different remote
3219 addresses in the same message used different return paths and parallel
3220 remote delivery occurred, the wrong values would sometimes be logged.
3221 (Whenever a remote delivery process finished, the return path value from
3222 the most recently started remote delivery process was logged.)
3224 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3225 lines when AUTH and/or TLS are in use. This is the "received protocol"
3226 field. Exim used to use "asmtp" for authenticated SMTP, without any
3227 indication (in the protocol name) for TLS use. Now it follows the RFC and
3228 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3229 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3230 names appear in log lines as well as in Received: header lines.
3232 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3233 extensions, and comparison tests, and to fix some bugs.
3235 14. Changes to the "personal" filter test:
3237 (1) The test was buggy in that it was just doing the equivalent of
3238 "contains" tests on header lines. For example, if a user's address was
3239 anne@some.where, the "personal" test would incorrectly be true for
3241 To: susanne@some.where
3243 This test is now done by extracting each address from the header in turn,
3244 and checking the entire address. Other tests that are part of "personal"
3245 are now done using regular expressions (for example, to check local parts
3246 of addresses in From: header lines).
3248 (2) The list of non-personal local parts in From: addresses has been
3249 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3250 taken from the Sieve specification recommendations.
3252 (3) If the message contains any header line starting with "List-" it is
3253 treated as non-personal.
3255 (4) The test for "circular" in the Subject: header line has been removed
3256 because it now seems ill-conceived.
3258 15. Minor typos in src/EDITME comments corrected.
3260 16. Installed latest exipick from John Jetmore.
3262 17. If headers_add on a router specified a text string that was too long for
3263 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3264 of string_sprintf() is now avoided.
3266 18. $message_body_size was not set (it was always zero) when running the DATA
3267 ACL and the local_scan() function.
3269 19. For the "mail" command in an Exim filter, no default was being set for
3270 the once_repeat time, causing a random time value to be used if "once" was
3271 specified. (If the value happened to be <= 0, no repeat happened.) The
3272 default is now 0s, meaning "never repeat". The "vacation" command was OK
3273 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3274 (I found it when inspecting the code).
3276 20. There is now an overall timeout for performing a callout verification. It
3277 defaults to 4 times the callout timeout, which applies to individual SMTP
3278 commands during the callout. The overall timeout applies when there is more
3279 than one host that can be tried. The timeout is checked before trying the
3280 next host. This prevents very long delays if there are a large number of
3281 hosts and all are timing out (e.g. when the network connections are timing
3282 out). The value of the overall timeout can be changed by specifying an
3283 additional sub-option for "callout", called "maxwait". For example:
3285 verify = sender/callout=5s,maxwait=20s
3287 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3288 to the end before writing, but this should make it even safer).
3290 22. Exim was forgetting that it had advertised PIPELINING for the second and
3291 subsequent messages on an SMTP connection. It was also not resetting its
3292 memory on STARTTLS and an internal HELO.
3294 23. When Exim logs an SMTP synchronization error within a session, it now
3295 records whether PIPELINING has been advertised or not.
3297 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3298 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3299 rather than long int.
3301 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3303 26. Added the never_mail option to autoreply.
3309 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3310 crash if the getsockname() call failed; this can happen if a connection is
3311 closed very soon after it is established. The problem was simply in the
3312 order in which certain operations were done, causing Exim to try to write
3313 to the SMTP stream before it had set up the file descriptor. The bug has
3314 been fixed by making things happen in the correct order.
3320 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3321 before the connection was closed, thus losing the rejection response.
3323 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3324 some early Solaris releases, but causes trouble in current releases where
3325 socklen_t is defined.
3327 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3330 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3333 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3334 that releasing the top of it at the end releases what was used for sub-
3335 expansions (unless the block got too big). However, discard this block if
3336 the first thing is a variable or header, so that we can use its block when
3337 it is dynamic (useful for very large $message_headers, for example).
3339 6. Lookups now cache *every* query, not just the most recent. A new, separate
3340 store pool is used for this. It can be recovered when all lookup caches are
3341 flushed. Lookups now release memory at the end of their result strings.
3342 This has involved some general refactoring of the lookup sources.
3344 7. Some code has been added to the store_xxx() functions to reduce the amount
3345 of flapping under certain conditions.
3347 8. log_incoming_interface used to affect only the <= reception log lines. Now
3348 it causes the local interface and port to be added to several more SMTP log
3349 lines, for example "SMTP connection from", and rejection lines.
3351 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3353 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3355 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3356 could be overwritten at the end of the current message (or the start of a
3357 new message if it was set in a HELO ACL). The value is now preserved for
3358 the duration of the SMTP connection.
3360 12. If a transport had a headers_rewrite setting, and a matching header line
3361 contained an unqualified address, that address was qualified, even if it
3362 did not match any rewriting rules. The underlying bug was that the values
3363 of the flags that permit the existence of unqualified sender and recipient
3364 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3365 non-local messages, and by -bnq for local messages) were not being
3366 preserved with the message after it was received.
3368 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3369 "next input=" as part of the text comprising the host identity instead of
3370 the correct text. The code was using the same buffer for two different
3371 strings. However, depending on which order the printing function evaluated
3372 its arguments, the bug did not always show up. Under Linux, for example, my
3373 test suite worked just fine.
3375 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3376 doesn't work with some older versions of Perl. It has been changed to "my",
3377 which in any case is probably the better facility to use.
3379 15. A really picky compiler found some instances of statements for creating
3380 error messages that either had too many or two few arguments for the format
3383 16. The size of the buffer for calls to the DNS resolver has been increased
3384 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3385 for addresses that have a lot of PTR records. This alleviates a problem; it
3386 does not fully solve it.
3388 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3389 buffer now truncates the list and logs the incident, which is the same
3390 action as happens when Exim is looking up a host name and its aliases.
3391 Previously in this situation something unpredictable would happen;
3392 sometimes it was "internal error: store_reset failed".
3394 18. If a server dropped the connection unexpectedly when an Exim client was
3395 using GnuTLS and trying to read a response, the client delivery process
3396 crashed while trying to generate an error log message.
3398 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3399 string, for example:
3401 warn message = H1: something\nH2: something
3403 the text was added as a single header line from Exim's point of view
3404 though it ended up OK in the delivered message. However, searching for the
3405 second and subsequent header lines using $h_h2: did not work. This has been
3406 fixed. Similarly, if a system filter added multiple headers in this way,
3407 the routers could not see them.
3409 20. Expanded the error message when iplsearch is called with an invalid key to
3410 suggest using net-iplsearch in a host list.
3412 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3413 ACLs are no longer actually imposed (and a message to that effect is
3416 22. If a "gecos" field in a passwd entry contained escaped characters, in
3417 particular, if it contained a \" sequence, Exim got it wrong when building
3418 a From: or a Sender: header from that name. A second bug also caused
3419 incorrect handling when an unquoted " was present following a character
3420 that needed quoting.
3422 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3423 was not being matched caselessly.
3425 24. Arranged for all hyphens in the exim.8 source to be escaped with
3428 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3429 properly. Recipient callout cache records were still being keyed to include
3430 the sender, even when use_sender was set false. This led to far more
3431 callouts that were necessary. The sender is no longer included in the key
3432 when use_sender is false.
3434 26. Added "control = submission" modifier to ACLs.
3436 27. Added the ${base62d: operator to decode base 62 numbers.
3438 28. dnsdb lookups can now access SRV records.
3440 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3441 the configuration file.
3443 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3444 (-v) mode. This makes the output for a verbose queue run more intelligible.
3446 31. Added a use_postmaster feature to recipient callouts.
3448 32. Added the $body_zerocount variable, containing the number of binary zero
3449 bytes in the message body.
3451 33. The time of last modification of the "new" subdirectory is now used as the
3452 "mailbox time last read" when there is a quota error for a maildir
3455 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3457 35. Added +ignore_unknown as a special item in host lists.
3459 36. Code for decoding IPv6 addresses in host lists is now included, even if
3460 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3461 address was recognized as an IP address, but was then not correctly decoded
3462 into binary, causing unexpected and incorrect effects when compared with
3469 1. Very minor rewording of debugging text in manualroute to say "list of
3470 hosts" instead of "hostlist".
3472 2. If verify=header_syntax was set, and a header line with an unqualified
3473 address (no domain) and a large number of spaces between the end of the
3474 name and the colon was received, the reception process suffered a buffer
3475 overflow, and (when I tested it) crashed. This was caused by some obsolete
3476 code that should have been removed. The fix is to remove it!
3478 3. When running in the test harness, delay a bit after writing a bounce
3479 message to get a bit more predictability in the log output.
3481 4. Added a call to search_tidyup() just before forking a reception process. In
3482 theory, someone could use a lookup in the expansion of smtp_accept_max_
3483 per_host which, without the tidyup, could leave open a database connection.
3485 5. Added the variables $recipient_data and $sender_data which get set from a
3486 lookup success in an ACL "recipients" or "senders" condition, or a router
3487 "senders" option, similar to $domain_data and $local_part_data.
3489 6. Moved the writing of debug_print from before to after the "senders" test
3492 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3493 problems for message scanning, either using a data ACL, or using
3494 local_scan() because the Received: header was not generated till after they
3495 were called (in order to set the time as the time of reception completion).
3496 I have revised the way this works. The header is now generated after the
3497 body is received, but before the ACL or local_scan() are called. After they
3498 are run, the timestamp in the header is updated.
3504 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3505 before starting a queue runner without re-exec. This happened only when
3506 deliver_drop_privilege was set or when the Exim user was set to root. The
3507 effect of the bug was that timeouts during subsequent deliveries caused
3508 crashes instead of being properly handled. The handler is now left at its
3509 default (and expected) setting.
3511 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3512 message, again when deliver_drop_privilege is set or Exim is run as root.
3513 The bug described in (1) was not present in this case, but the tidying up
3514 of the other signals was missing. I have made the two cases consistent.
3516 3. The ignore_target_hosts setting on a manualroute router was being ignored
3517 for hosts that were looked up using the /MX notation.
3519 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3522 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3523 operated on the sender address. After changing the $sender_address to <>
3524 for the sender address verify, Exim was re-instated it as the original
3525 (before rewriting) address, but remembering that it had rewritten it, so it
3526 wasn't rewriting it again. This bug also had the effect of breaking the
3527 sender address verification caching when the sender address was rewritten.
3529 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3530 This has been changed so that if the ip literal address matches
3531 ignore_target_hosts, the router declines.
3533 7. Added expansion conditions match_domain, match_address, and match_local_
3534 part (NOT match_host).
3536 8. The placeholder for the Received: header didn't have a length field set.
3538 9. Added code to Exim itself and to exim_lock to test for a specific race
3539 condition that could lead to file corruption when using MBX delivery. The
3540 issue is with the lockfile that is created in /tmp. If this file is removed
3541 after a process has opened it but before that process has acquired a lock,
3542 there is the potential for a second process to recreate the file and also
3543 acquire a lock. This could lead to two Exim processes writing to the file
3544 at the same time. The added code performs the same test as UW imapd; it
3545 checks after acquiring the lock that its file descriptor still refers to
3546 the same named file.
3548 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3549 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3552 11. Added the smtp_active_hostname option. If used, this will typically be made
3553 to depend on the incoming interface address. Because $interface_address is
3554 not set up until the daemon has forked a reception process, error responses
3555 that can happen earlier (such as "too many connections") no longer contain
3558 12. If an expansion in a condition on a "warn" statement fails because a lookup
3559 defers, the "warn" statement is abandoned, and the next ACL statement is
3560 processed. Previously this caused the whole ACL to be aborted.
3562 13. Added the iplsearch lookup type.
3564 14. Added ident_timeout as a log selector.
3566 15. Added tls_certificate_verified as a log selector.
3568 16. Added a global option tls_require_ciphers (compare the smtp transport
3569 option of the same name). This controls incoming TLS connections.
3571 17. I finally figured out how to make tls_require_ciphers do a similar thing
3572 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3573 before starting the TLS session.
3575 18. Tabs are now shown as \t in -bP output.
3577 19. If the log selector return_path_on_delivery was set, Exim crashed when
3578 bouncing a message because it had too many Received: header lines.
3580 20. If two routers both had headers_remove settings, and the first one included
3581 a superfluous trailing colon, the final name in the first list and the
3582 first name in the second list were incorrectly joined into one item (with a
3583 colon in the middle).
3589 1. Added -C and -D options to the exinext utility, mainly to make it easier
3590 to include in the automated testing, but these could be helpful when
3591 multiple configurations are in use.
3593 2. The exinext utility was not formatting the output nicely when there was
3594 an alternate port involved in the retry record key, nor when there was a
3595 message id as well (for retries that were specific to a specific message
3596 and a specific host). It was also confused by IPv6 addresses, because of
3597 the additional colons they contain. I have fixed the IPv4 problem, and
3598 patched it up to do a reasonable job for IPv6.
3600 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3601 delivery, the log line now contains "pipelined" if PIPELINING was used.
3603 4. An SMTP transport process used to panic and die if the bind() call to set
3604 an explicit outgoing interface failed. This has been changed; it is now
3605 treated in the same way as a connect() failure.
3607 5. A reference to $sender_host_name in the part of a conditional expansion
3608 that was being skipped was still causing a DNS lookup. This no longer
3611 6. The def: expansion condition was not recognizing references to header lines
3612 that used bh_ and bheader_.
3614 7. Added the _cache feature to named lists.
3616 8. The code for checking quota_filecount in the appendfile transport was
3617 allowing one more file than it should have been.
3619 9. For compatibility with Sendmail, the command line option
3627 and sets the incoming protocol and host name (for trusted callers). The
3628 host name and its colon can be omitted when only the protocol is to be set.
3629 Note the Exim already has two private options, -pd and -ps, that refer to
3630 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3631 "s", but I don't think that's a major issue.
3633 10. A number of refactoring changes to the code, none of which should affect
3636 (a) The number of logging options was getting close to filling up the
3637 32-bit word that was used as a bit map. I have split them into two classes:
3638 those that are passed in the argument to log_write(), and those that are
3639 only ever tested independently outside of that function. These are now in
3640 separate 32-bit words, so there is plenty of room for expansion again.
3641 There is no change in the user interface or the logging behaviour.
3643 (b) When building, for example, log lines, the code previously used a
3644 macro that called string_cat() twice, in order to add two strings. This is
3645 not really sufficiently general. Furthermore, there was one instance where
3646 it was actually wrong because one of the argument was used twice, and in
3647 one call a function was used. (As it happened, calling the function twice
3648 did not affect the overall behaviour.) The macro has been replaced by a
3649 function that can join an arbitrary number of extra strings onto a growing
3652 (c) The code for expansion conditions now uses a table and a binary chop
3653 instead of a serial search (which was left over from when there were very
3654 few conditions). Also, it now recognizes conditions like "pam" even when
3655 the relevant support is not compiled in: a suitably worded error message is
3656 given if an attempt is made to use such a condition.
3658 11. Added ${time_interval:xxxxx}.
3660 12. A bug was causing one of the ddress fields not to be passed back correctly
3661 from remote delivery subprocesses. The field in question was not being
3662 subsequently used, so this caused to problems in practice.
3664 13. Added new log selectors queue_time and deliver_time.
3666 14. Might have fixed a bug in maildirsizefile handling that threw up
3667 "unexpected character" debug warnings, and recalculated the data
3668 unnecessarily. In any case, I expanded the warning message to give more
3671 15. Added the message "Restricted characters in address" to the statements in
3672 the default ACL that block characters like @ and % in local parts.
3674 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3675 Three changes have been made:
3677 (a) There was a serious bug; a negative response to MAIL caused the whole
3678 recipient domain to be cached as invalid, thereby blocking all messages
3679 to all local parts at the same domain, from all senders. This bug has
3680 been fixed. The domain is no longer cached after a negative response to
3681 MAIL if the sender used is not empty.
3683 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3686 (c) A new callout option, "use_sender" has been added for people who want
3687 the modified behaviour.
3693 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3696 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3697 indeed breaks things for older releases.
3699 3. Added additional logging to the case where there is a problem reading data
3700 from a filter that is running in a subprocess using a pipe, in order to
3701 try to track down a specific problem.
3703 4. Testing facility fudge: when running in the test harness and attempting
3704 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3705 getting "No route to host". Convert this to a timeout.
3707 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3710 6. Some OS don't have socklen_t but use size_t instead. This affects the
3711 fifth argument of getsockopt() amongst other things. This is now
3712 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3713 can be set for individual OS. I have set it for SunOS5, OSF1, and
3714 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3715 some earlier ones do not.
3717 7. Change 4.30/15 was not doing the test caselessly.
3719 8. The standard form for an IPv6 address literal was being rejected by address
3720 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3721 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3722 this, as well as the form without the "IPv6" on the front (but only when
3723 address literals are enabled, of course).
3725 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3727 10. Exim crashed if a message with an empty sender address specified by -f
3728 encountered a router with an errors_to setting. This could be provoked only
3729 by a command such as
3733 where an empty string was supplied; "<>" did not hit this bug.
3735 11. Installed PCRE release 4.5.
3737 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3738 remained set. It is now erased.
3740 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3741 times from message ids (which are base 36 rather than the normal 62).
3743 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3744 were being counted as actual protocol errors, and logged if the log
3745 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3746 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3747 and DATA following a set of rejected RCPTs do not count as protocol errors.
3748 In other words, Exim assumes they were pipelined, though this may not
3749 actually be the case. Of course, in all cases the client gets an
3750 appropriate error code.
3752 15. If a lookup fails in an ACL condition, a message about the failure may
3753 be available; it is used if testing the ACL cannot continue, because most
3754 such messages specify what the cause of the deferral is. However, some
3755 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3756 that caused an old message to be retained and used if a later statement
3757 caused a defer, replacing the real cause of the deferral.
3759 16. If an IP address had so many PTR records that the DNS lookup buffer
3760 was not large enough to hold them, Exim could crash while trying to process
3761 the truncated data. It now detects and logs this case.
3763 17. Further to 4.21/58, another change has been made: if (and only if) the
3764 first line of a message (the first header line) ends with CRLF, a bare LF
3765 in a subsequent header line has a space inserted after it, so as not to
3766 terminate the header.
3768 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3769 unnecessarily, used atoi() instead of strtol(), and didn't check the
3770 termination when getting file sizes from file names by regex.
3772 19. Completely re-implemented the support for maildirsize files, in the light
3773 of a number of problems with the previous contributed implementation
3774 (4.30/29). In particular:
3776 . If the quota is zero, the maildirsize file is maintained, but no quota is
3779 . If the maildir directory does not exist, it is created before any attempt
3780 to write a maildirsize file.
3782 . The quota value in the file is just a cache; if the quota is changed in
3783 the transport, the new value overrides.
3785 . A regular expression is available for excluding directories from the
3788 20. The autoreply transport checks the characters in options that define the
3789 message's headers; it allows continued headers, but it was checking with
3790 isspace() after an embedded newline instead of explicitly looking for a
3793 21. If all the "regular" hosts to which an address was routed had passed their
3794 expiry times, and had not reached their retry times, the address was
3795 bounced, even if fallback hosts were defined. Now Exim should go on to try
3798 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3799 equivalent code in the SMTP transport. Some hosts send humungous responses
3800 to HELO/EHLO, more than 1024 it seems.
3802 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3803 gives compiler warnings in some environments. I've now done it "properly",
3806 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3807 (because of problems with the built-in one) was declared to return uschar *
3808 instead of char *, causing compiler failure.
3810 25. Fixed a file descriptor leak when processing alias/forward files.
3812 26. Fixed a minor format string issue in dbfn.c.
3814 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3816 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3817 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3820 29. When a sender address is verified, it is cached, to save repeating the test
3821 when there is more than one recipient in a message. However, when the
3822 verification involves a callout, it is possible for different callout
3823 options to be set for different recipients. It is too complicated to keep
3824 track of this in the cache, so now Exim always runs a verification when a
3825 callout is required, relying on the callout cache for the optimization.
3826 The overhead is duplication of the address routing, but this should not be
3829 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3830 to be verified with callout=postmaster, and the main callout worked but the
3831 postmaster check failed, the verification correctly failed. However, if a
3832 subsequent RCPT command asked for sender verification *without* the
3833 postmaster check, incorrect caching caused this verification also to fail,
3836 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3837 it was not caching the DNS options (qualify_single, search_parents) that
3838 were used when the lookup failed. A subsequent lookup with different
3839 options therefore always gave the same answer, though there were cases
3840 where it should not have. (Example: a "domains = !$mx_any" option on a
3841 dnslookup router: the "domains" option is always processed without any
3842 widening, but the router might have qualify_single set.) Now Exim uses the
3843 cached value only when the same options are set.
3845 32. Added John Jetmore's "exipick" utility to the distribution.
3847 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3848 than a timeout (e.g. a certificate is required, and is not provided), an
3849 Exim server now closes the connection immediately. Previously it waited for
3850 the client to close - but if the client is SSL, it seems that they each
3851 wait for each other, leading to a delay before one of them times out.
3853 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3854 maintained 0.8.x compatibility because I don't think many are using it, and
3855 it is clearly obsolete.
3857 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3860 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3861 client certificate was expired. A simple patch fixes this, though I don't
3862 understand the full logic of why the verify callback is called multiple
3865 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3866 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3867 which causes problems with some clients (such as the Certicom SSL Plus
3868 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3869 disables the coutermeasure allowing Eudora to connect."
3871 38. Exim was not checking that a write() to a log file succeeded. This could
3872 lead to Bad Things if a log got too big, in particular if it hit a file
3873 size limit. Exim now panics and dies if it cannot write to a log file, just
3874 as it does if it cannot open a log file.
3876 39. Modified OS/Makefile-Linux so that it now contains
3878 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3880 The two -D definitions ensure that Exim is compiled with large file
3881 support, which makes it possible to handle log files that are bigger than
3884 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3885 instance) a domain was checked against a named list that involved a lookup,
3886 causing $domain_data to be set, then another domain was checked against the
3887 same list, then the first domain was re-checked, the value of $domain_data
3888 after the final check could be wrong. In particular, if the second check
3889 failed, it could be set empty. This bug probably also applied to
3892 41. The strip_trailing_dot option was not being applied to the address given
3893 with the -f command-line option.
3895 42. The code for reading a message's header from the spool was incrementing
3896 $received_count, but never initializing it. This meant that the value was
3897 incorrect (doubled) while delivering a message in the same process in which
3898 it was received. In the most common configuration of Exim, this never
3899 happens - a fresh exec is done - but it can happen when
3900 deliver_drop_privilege is set.
3902 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3903 it now includes up to 150 characters of the unexpected data in the log
3906 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3907 and building data strings. The size of both of these buffers was 10 000
3908 bytes - far larger than anybody would *ever* want, thought I. Needless to
3909 say, somebody hit the limit. I have increased the maximum line length to
3910 20 000 and the maximum data length of concatenated lines to 100 000. I have
3911 also fixed two bugs, because there was no checking on these buffers. Tsk,
3912 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3913 buffer is too small.
3915 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3916 lsearch lookups. Now it does.
3918 46. When parsing a route_list item in a manualroute router, a fixed-length
3919 buffer was used for the list of hosts. I made this 1024 bytes long,
3920 thinking that nobody would ever have a list of hosts that long. Wrong.
3921 Somebody had a whole pile of complicated expansion conditions, and the
3922 string was silently truncated, leading to an expansion error. It turns out
3923 that it is easier to change to an unlimited length (owing to other changes
3924 that have happened since this code was originally written) than to build
3925 structure for giving a limitation error. The length of the item that
3926 expands into the list of hosts is now unlimited.
3928 47. The lsearch lookup could not handle data where the length of text line was
3929 more than 4095 characters. Such lines were truncated, leading to shortened
3930 data being returned. It should now handle lines of any length.
3932 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3933 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3936 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3937 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3938 no longer happens in comment lines. A list of replacements is now placed
3939 at the head of all of the source files, except those whose only change is
3940 to replace PERL_COMMAND in the very first #! line.
3942 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3943 messages on the queue, with a bottom-up merge sort, using code contributed
3944 by Michael Haardt. This should make operations like -bp somewhat faster on
3945 large queues. It won't affect queue runners, except when queue_run_in_order
3948 51. Installed eximstats 1.31 in the distribution.
3950 52. Added support for SRV lookups to the dnslookup router.
3952 53. If an ACL referred to $message_body or $message_body_end, the value was not
3953 reset for any messages that followed in the same SMTP session.
3955 54. The store-handling optimization for building very long strings was not
3956 differentiating between the different store pools. I don't think this
3957 actually made any difference in practice, but I've tidied it.
3959 55. While running the routers to verify a sender address, $sender_address
3960 was still set to the sender address. This is wrong, because when routing to
3961 send a bounce to the sender, it would be empty. Therefore, I have changed
3962 it so that, while verifying a sender address, $sender_address is set to <>.
3963 (There is no change to what happens when verifying a recipient address.)
3965 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3966 target A or AAAA records (if not already returned) without resetting the
3967 qualify_single or search_parents options of the DNS resolver. These are
3968 inappropriate in this case because the targets of MX and SRV records must
3969 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3970 target that, when qualified, matched something in the local domain. These
3971 two options are now turned off when doing these lookups.
3973 57. It seems that at least some releases of Reiserfs (which does not have the
3974 concept of a fixed number of inodes) returns zero and not -1 for the
3975 number of available inodes. This interacted badly with check_spool_inodes,
3976 which assumed that -1 was the "no such thing" setting. What I have done is
3977 to check that the total number of inodes is greater than zero before doing
3978 the test of how many are available.
3980 58. When a "warn" ACL statement has a log_message modifier, the message is
3981 remembered, and not repeated. This is to avoid a lot of repetition when a
3982 message has many recipients that cause the same warning to be written.
3983 Howewer, Exim was preserving the list of already written lines for an
3984 entire SMTP session, which doesn't seem right. The memory is now reset if a
3985 new message is started.
3987 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3988 debugging output unless log_rewrite was also set.
3990 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3991 of (int)(handle) when we know that handle contains (void *)(-1).
3993 61. The Exim daemon panic-logs an error return when it closes the incoming
3994 connection. However "connection reset by peer" seems to be common, and
3995 isn't really an error worthy of noting specially, so that particular error
3998 62. When Exim is trying to find all the local interfaces, it used to panic and
3999 die if the ioctl to get the interface flags failed. However, it seems that
4000 on at least one OS (Solaris 9) it is possible to have an interface that is
4001 included in the list of interfaces, but for which you get a failure error
4002 for this call. This happens when the interface is not "plumbed" into a
4003 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4004 failure of the "get flags" call assumes that the interface is down.
4006 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4007 makes life easier for people who are doing arithmetic on fields extracted
4008 from dates, where you often get leading zeros that should not be
4009 interpreted as octal.
4011 64. Added qualify_domain to the redirect router, to override the global
4014 65. If a pathologically long header line contained very many addresses (the
4015 report of this problem mentioned 10 000) and each of them was rewritten,
4016 Exim could use up a very large amount of memory. (It kept on making new
4017 copies of the header line as it rewrote, and never released the old ones.)
4018 At the expense of a bit more processing, the header rewriting function has
4019 been changed so that it no longer eats memory in this way.
4021 66. The generation of the Received: header has been moved from the time that a
4022 message starts to be received, to the time that it finishes. The timestamp
4023 in the Received: header should now be very close to that of the <= log
4024 line. There are two side-effects of this change:
4026 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4027 logged header lines no longer include the local Received: line, because
4028 it has not yet been created. The same applies to a copy of the message
4029 that is returned to a non-SMTP sender when a message is rejected.
4031 (b) When a filter file is tested using -bf, no additional Received: header
4032 is added to the test message. After some thought, I decided that this
4035 This change does not affect the value of $received_for. It is still set
4036 after address rewriting, but before local_scan() is called.
4038 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4040 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4041 gave an unhelpful panic error message, and a defer error. I have managed to
4042 change this behaviour so that it now rejects any supplied certificate,
4043 which seems right, as the list of acceptable certificates is empty.
4045 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4046 gave an unhelpful defer error. I have not managed to make this reject any
4047 supplied certificates, but the error message it gives is "no certificate
4048 supplied", which is not helpful.
4050 70. exigrep's output now also includes lines that are not associated with any
4051 message, but which match the given pattern. Implemented by a patch from
4052 Martin Sluka, which also tidied up the Perl a bit.
4054 71. Recipient callout verification, like sender verification, was using <> in
4055 the MAIL FROM command. This isn't really the right thing, since the actual
4056 sender may affect whether the remote host accepts the recipient or not. I
4057 have changed it to use the actual sender in the callout; this means that
4058 the cache record is now keyed on a recipient/sender pair, not just the
4059 recipient address. There doesn't seem to be a real danger of callout loops,
4060 since a callout by the remote host to check the sender would use <>.
4061 [SEE ABOVE: changed after hitting problems.]
4063 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4064 temporary errors. However, in the case of such a code being given after
4065 the end of a data transmission (i.e. after ".") Exim was failing to write
4066 a retry record for the message. (Yes, there was some broken host that was
4067 actually sending 8xx at this point.)
4069 73. An unknown lookup type in a host list could cause Exim to panic-die when
4070 the list was checked. (An example that provoked this was putting <; in the
4071 middle of a list instead of at the start.) If this happened during a DATA
4072 ACL check, a -D file could be left lying around. This kind of configuration
4073 error no longer causes Exim to die; instead it causes a defer errror. The
4074 incident is still logged to the main and panic logs.
4076 74. Buglet left over from Exim 3 conversion. The message "too many messages
4077 in one connection" was written to the rejectlog but not the mainlog, except
4078 when address rewriting (yes!) was being logged.
4080 75. Added write_rejectlog option.
4082 76. When a system filter was run not as root (that is, when system_filter_user
4083 was set), the values of the $n variables were not being returned to the
4084 main process; thus, they were not subsequently available in the $sn
4087 77. Added +return_path_on_delivery log selector.
4089 78. A connection timeout was being treated differently from recipients deferred
4090 when testing hosts_max_try with a message that was older than the host's
4091 retry timeout. (The host should not be counted, thus allowing all hosts to
4092 be tried at least once before bouncing.) This may have been the cause of an
4093 occasionally reported bug whereby a message would remain on the queue
4094 longer than the retry timeout, but would be bounced if a delivery was
4095 forced. I say "may" because I never totally pinned down the problem;
4096 setting up timeout/retry tests is difficult. See also the next item.
4098 79. The ultimate address timeout was not being applied to errors that involved
4099 a combination of host plus message (for example, a timeout on a MAIL
4100 command). When an address resolved to a number of possible hosts, and they
4101 were not all tried for each delivery (e.g. because of hosts_max_try), a
4102 message could remain on the queue longer than the retry timeout.
4104 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4107 81. Fixed an obscure SMTP outgoing bug which required at least the following
4108 conditions: (a) there was another message waiting for the same server;
4109 (b) the server returned 5xx to all RCPT commands in the first message so
4110 that the message was not completed; (c) the server dropped the connection
4111 or gave a negative response to the RSET that Exim sends to abort the
4112 transaction. The observed case was a dropped connection after DATA that had
4113 been sent in pipelining mode. That is, the server had advertised PIPELINING
4114 but was not implementing it correctly. The effect of the bug was incorrect
4115 behaviour, such as trying another host, and this could lead to a crash.
4121 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4122 and daemon.c were passed as pointers to ints; they should have been
4123 pointers to socklen_t variables (which are typically unsigned ints).
4125 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4128 3. Fixed a really odd bug that affected only the testing scheme; patching a
4129 certain fixed string in the binary changed the value of another string that
4130 happened to be identical to the end of the original first string.
4132 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4133 name", it returns that address as the IP address. On some operating
4134 systems (e.g. Solaris), it also passes back the IP address string as the
4135 "host name". However, on others (e.g. Linux), it passes back an empty
4136 string. Exim wasn't checking for this, and was changing the host name to an
4137 empty string, assuming it had been canonicized.
4139 5. Although rare, it is permitted to have more than one PTR record for a given
4140 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4141 all the names associated with an address, because they do in Solaris.
4142 However, it seems that they do not in Linux for data that comes from the
4143 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4144 I found this out when I moved to a new Linux workstation and tried to run
4145 the Exim test suite.
4147 To get round this problem I have changed the code so that it now does its
4148 own call to the DNS to look up PTR records when searching for a host name.
4149 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4150 addresses that are only in /etc/hosts are still found.
4152 This behaviour is, however, controlled by an option called host_lookup_
4153 order, which defaults to "bydns:byaddr". If people want to use the other
4154 order, or indeed, just use one or the other means of lookup, they can
4155 specify it in this variable.
4157 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4158 some operating systems, this comes back from gethostbyaddr() as an empty
4159 string, and this is what Exim used to test for. However, it seems that in
4160 other systems, "." is yielded. Exim now tests for this case too.
4162 7. The values of check_spool_space and check_log_space are now held internally
4163 as a number of kilobytes instead of an absolute number of bytes. If a
4164 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4165 kilobyte. This means that much larger values can be stored.
4167 8. Exim monitor: an attempt to get the action menu when not actually pointing
4168 at a message produces an empty menu entitled "No message selected". This
4169 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4170 no entries in it ("Shell widget menu has zero width and/or height"). So I
4171 have added a single, blank menu entry in this case.
4173 9. Added ${quote_local_part.
4175 10. MIME decoding is now applied to the contents of Subject: header lines when
4178 11. Now that a reference to $sender_host_address automatically causes a reverse
4179 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4180 host lookup before query-style lookups in lists that might use this
4181 variable. This has therefore been abolished, and the "net-" prefix is no
4182 longer necessary for query-style lookups.
4184 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4185 have been a typo for LFLAGS, so it has been changed.
4187 13. The install script calls Exim with "-C /dev/null" in order to find the
4188 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4189 to be output. Howeve, since Exim outputs its version number before the
4190 error, it didn't break the script. It just looked ugly. I fixed this by
4191 always allowing "-C /dev/null" if the caller is root.
4193 14. Ignore overlarge ACL variable number when reading spool file - insurance
4194 against a later release with more variables having written the file.
4196 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4197 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4198 this, as well as the form without the "IPv6" on the front.
4200 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4201 OS/Makefile-Darwin file.
4203 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4204 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4206 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4207 variable. However, some OS use ints for inodes. I've added cast to long int
4208 to get rid of the compiler warning.
4210 19. I had forgotten to lock out "/../" in configuration file names when
4211 ALT_CONFIG_PREFIX was set.
4213 20. Routers used for verification do not need to specify transports. However,
4214 if such a router generated a host list, and callout was configured, Exim
4215 crashed, because it could not find a port number from the (non-existent)
4216 transport. It now assumes port 25 in this circumstance.
4218 21. Added the -t option to exigrep.
4220 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4221 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4222 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4223 them is set, LOOKUP_LSEARCH is forced.
4225 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4227 24. Added sender and host information to the "rejected by local_scan()" log
4228 line; previously there was no indication of these.
4230 25. Added .include_if_exists.
4232 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4233 Linux. It turns out that not all file systems support this. Apparently some
4234 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4235 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4236 not supported on the file descriptor, is now ignored when Exim is trying to
4237 sync a directory. This applies only to Linux.
4239 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4241 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4242 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4245 29. Added support for maildirsize files from supplied patch (modified a bit).
4247 30. The use of :fail: followed by an empty string could lead Exim to respond to
4248 sender verification failures with (e.g.):
4250 550 Verification failed for <xxx>
4251 550 Sender verify failed
4253 where the first response line was missing the '-' that indicates it is not
4254 the final line of the response.
4256 31. The loop for finding the name of the user that called Exim had a hardwired
4257 limit of 10; it now uses the value of finduser_retries, which is used for
4258 all other user lookups.
4260 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4263 33. Exim was neglecting to zero errno before one call of strtol() when
4264 expanding a string and expecting an integer value. On some systems this
4265 resulted in spurious "integer overflow" errors. Also, it was casting the
4266 result into an int without checking.
4268 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4269 did not work. The code looks as if it has *never* worked, though it appears
4270 to have been documented since at least releast 1.62. I have made it work.
4272 35. The "timeout_DNS" error in retry rules, also documented since at least
4273 1.62, also never worked. As it isn't clear exactly what this means, and
4274 clearly it isn't a major issue, I have abolished the feature by treating it
4275 as "timeout", and writing a warning to the main and panic logs.
4277 36. The display of retry rules for -brt wasn't always showing the error code
4280 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4281 timeout_connect_A, timeout_connect_MX.
4283 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4284 to the empty sender.
4286 39. The daemon was not analysing the content of -oX till after it had closed
4287 stderr and disconnected from the controlling terminal. This meant that any
4288 syntax errors were only noted on the panic log, and the return code from
4289 the command was 0. By re-arranging the code a little, I've made the
4290 decoding happen first, so such errors now appear on stderr, and the return
4291 code is 1. However, the actual setting up of the sockets still happens in
4292 the disconnected process, so errors there are still only recorded on the
4295 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4296 connections (as happens on some IP stacks) was logged at start up time as
4297 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4298 it from "IPv6 and IPv4", which means that two separate sockets are being
4301 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4302 says whether AF_INET or AF_INET6 was passed as an argument.
4304 42. Exiwhat output was messed up when time zones were included in log
4307 43. Exiwhat now gives more information about the daemon's listening ports,
4308 and whether -tls-on-connect was used.
4310 44. The "port" option of the smtp transport is now expanded.
4312 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4313 silently ignored. Now an error message is written to the main and panic
4316 46. There's a new ACL modifier called "logwrite" which writes to a log file
4317 as soon as it is encountered.
4319 47. Added $local_user_uid and $local_user_gid at routing time.
4321 48. Exim crashed when trying to verify a sender address that was being
4324 49. Exim was recognizing only a space character after ".include". It now also
4325 recognizes a tab character.
4327 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4328 extracting the relevant information from the specification. The man page no
4329 longer contains scrambled data for the -d option, and I've added a section
4330 at the front about calling Exim under different names.
4332 51. Added "extra_headers" argument to the "mail" command in filter files.
4334 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4337 53. Installed eximstats 1.29.
4339 54. Added transport_filter_timeout as a generic transport option.
4341 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4342 Cc: header lines. This was required by RFC 822, but it not required by RFC
4345 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4346 incoming messages that did not have them. Now it does so only if the
4347 message originates locally, that is, if there is no associated remote host
4348 address. When Resent- header lines are present, this applies to the Resent-
4349 lines rather than the non-Resent- lines.
4351 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4352 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4354 58. Messages for configuration errors now include the name of the main
4355 configuration file - useful now that there may be more than one file in a
4356 list (.included file names were always shown).
4358 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4359 for those rare installations that do not start the daemon as root or run it
4360 setuid root. I've cut out the call to initgroups() if the daemon is not
4363 60. The Exim user and group can now be bound into the binary as text strings
4364 that are looked up at the start of Exim's processing.
4366 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4368 62. Added $mailstore_basename variable.
4370 63. Installed patch to sieve.c from Michael Haardt.
4372 64. When Exim failed to open the panic log after failing to open the main log,
4373 the original message it was trying to log was written to stderr and debug
4374 output, but if they were not available (the usual case in production), it
4375 was lost. Now it is written to syslog before the two lines that record the
4376 failures to open the logs.
4378 65. Users' Exim filters run in subprocesses under the user's uid. It is
4379 possible for a "deliver" command or an alias in a "personal" command to
4380 provoke an address rewrite. If logging of address rewriting is configured,
4381 this fails because the process is not running as root or exim. There may be
4382 a better way of dealing with this, but for the moment (because 4.30 needs
4383 to be released), I have disabled address rewrite logging when running a
4384 filter in a non-root, non-exim process.
4390 1. The buildconfig auxiliary program wasn't quoting the value set for
4391 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4392 not defined. This bug was masked in 4.22 by the effect that was fixed in
4395 2. Some messages that were rejected after a message id was allocated were
4396 shown as "incomplete" by exigrep. It no longer does this for messages that
4397 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4399 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4400 have allow_domain_literals set, the ID did not get logged in the <= line.
4401 Domain literals are now always recognized in Message-ID: header lines.
4403 4. The first argument for a ${extract expansion item is the key name or field
4404 number. Leading and trailing spaces in this item were not being ignored,
4405 causing some misleading effects.
4407 5. When deliver_drop_privilege was set, single queue runner processes started
4408 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4409 same command in the process it spins off) were not dropping privilege.
4411 6. When the daemon running as "exim" started a queue runner, it always
4412 re-executed Exim in the spun-off process. This is a waste of effort when
4413 deliver_drop_privilege is set. The new process now just calls the
4414 queue-runner function directly.
4420 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4423 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4424 ignored. Though the use of -oP was forcing the writing of a pid file, it
4425 was always written to the default place.
4427 3. If the message "no IP address found for host xxxx" is generated during
4428 incoming verification, it is now followed by identification of the incoming
4429 connection (so you can more easily find what provoked it).
4431 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4433 5. Added some features to "harden" Exim a bit more against certain attacks:
4435 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4436 be put in Local/Makefile. This is like the never_users runtime option,
4437 but it cannot be overridden. The default setting is "root".
4439 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4440 prefix string with which any file named in a -C command line option
4443 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4444 is retained for -C and -D only if the caller of Exim is root. Without
4445 it, the exim user may also use -C and -D and retain privilege.
4447 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4448 command line option is disabled.
4450 6. Macro names set by the -D option must start with an upper case letter, just
4451 like macro names defined in the configuration file.
4453 7. Added "dereference=" facility to LDAP.
4455 8. Two instances of the typo "uknown" in the source files are fixed.
4457 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4458 the Configure-Makefile script screwed up while processing it.
4460 10. Incorporated PCRE 4.4.
4462 11. The SMTP synchronization check was not operating right at the start of an
4463 SMTP session. For example, it could not catch a HELO sent before the client
4464 waited for the greeting. There is now a check for outstanding input at the
4465 point when the greeting is written. Because of the duplex, asynchronous
4466 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4467 way, but not yet received, when the check is performed.
4469 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4470 on TCP/IP sockets, because this apparently causes some broken clients to
4473 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4474 unchanged) from the Cygwin maintainer.
4476 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4477 was supported instead of testing for mbx. Effectively a typo.
4479 15. The spa authenticator server code was not checking that the input it
4480 received was valid base64.
4482 16. The debug output line for the "set" modifier in ACLs was not showing the
4483 name of the variable that was being set.
4485 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4487 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4488 lookup on its own. Something else was needed to trigger the lookup. For
4489 example, a match in host_lookup or the need for a host name in a host list.
4490 Now, if $sender_host_name is referenced and the host name has not yet been
4491 looked up, a lookup is performed. If the lookup fails, the variable remains
4492 empty, and $host_lookup_failed is set to "1".
4494 19. Added "eqi" as a case-independent comparison operator.
4496 20. The saslauthd authentication condition could segfault if neither service
4497 nor realm was specified.
4499 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4500 error message that was logged was misleading, and incoming SMTP
4501 connections were dropped. The message is now more accurate, and temporary
4502 errors are given to SMTP connections.
4504 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4505 (except RSET) with a 421 error, until QUIT is received. However, it was
4506 failing to send a response to QUIT.
4508 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4509 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4510 ACL is now run after the helo_try_verify_hosts code.
4512 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4513 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4514 case-independent, so other case variants are also recognized). Apparently
4515 some systems use these upper case variants.
4517 25. If more than two messages were waiting for the same host, and a transport
4518 filter was specified for the transport, Exim sent two messages over the
4519 same TCP/IP connection, and then failed with "socket operation on non-
4520 socket" when it tried to send the third.
4522 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4524 27. The extern definition of crypt16() in expand.c was not being excluded when
4525 the OS had its own crypt16() function.
4527 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4528 as a preferred synonym for return_size_limit, both as an option and as an
4531 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4533 30. Changed the default configuration ACL to relax the local part checking rule
4534 for addresses that are not in any local domains. For these addresses,
4535 slashes and pipe symbols are allowed within local parts, but the sequence
4536 /../ is explicitly forbidden.
4538 31. SPA server authentication was not clearing the challenge buffer before
4541 32. log_message in a "warn" ACL statement was writing to the reject log as
4542 well as to the main log, which contradicts the documentation and doesn't
4543 seem right (because no rejection is happening). So I have stopped it.
4545 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4546 However, I am unable to do any testing of this.
4548 34. Fixed an infelicity in the appendfile transport. When checking directories
4549 for a mailbox, to see if any needed to be created, it was accidentally
4550 using path names with one or more superfluous leading slashes; tracing
4551 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4553 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4554 contents are added to the log line that is written for every discarded
4555 recipient. (Previously a log_message setting was ignored.)
4557 36. The ${quote: operator now quotes the string if it is empty.
4559 37. The install script runs exim in order to find its version number. If for
4560 some reason other than non-existence or emptiness, which it checks, it
4561 could not run './exim', it was installing it with an empty version number,
4562 i.e. as "exim-". This error state is now caught, and the installation is
4565 38. An argument was missing from the function that creates an error message
4566 when Exim fails to connect to the socket for saslauthd authentication.
4567 This could cause Exim to crash, or give a corrupted message.
4569 39. Added isip, isip4, and isip6 to ${if conditions.
4571 40. The ACL variables $acl_xx are now saved with the message, and can be
4572 accessed later in routers, transports, and filters.
4574 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4575 strings in the file are not string-expanded.
4577 42. If a MAIL command specified a SIZE value that was too large to fit into an
4578 int variable, the check against message_size_limit failed. Such values are
4579 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4580 day this will have to be increased, but I don't think I want to be around
4581 when emails are that large.
4588 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4589 iconv() is not standard in FreeBSD.
4591 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4592 IPv6 enabled. The observed symptom was a segmentation fault on return from
4593 the function os_common_find_running_interfaces() in src/os.c.
4595 3. In the check_special_case() function in daemon.c I had used "errno" as an
4596 argument name, which causes warnings on some systems. This was basically a
4597 typo, since it was named "eno" in the comments!
4599 4. The code that waits for the clock to tick (at a resolution of some fraction
4600 of a second) so as to ensure message-id uniqueness was always waiting for
4601 at least one whole tick, when it could have waited for less. [This is
4602 almost certainly not relevant at current processor speeds, where it is
4603 unlikely to ever wait at all. But we try to future-proof.]
4605 5. The function that sleeps for a time interval that includes fractions of a
4606 second contained a race. It did not block SIGALRM between setting the
4607 timer, and suspending (a couple of lines later). If the interval was short
4608 and the sigsuspend() was delayed until after it had expired, the suspension
4609 never ended. On busy systems this could lead to processes getting stuck for
4612 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4613 process, before it forks any delivery processes. The open lookup caching
4614 mechanism meant that the open file or database connection was passed into
4615 the delivery process. The problem was that delivery processes always tidy
4616 up cached lookup data. This could cause a problem for the next delivery
4617 process started by the queue runner, because the external queue runner
4618 process does not know about the closure. So the next delivery process
4619 still has data in the lookup cache. In the case of a file lookup, there was
4620 no problem because closing a file descriptor in a subprocess doesn't affect
4621 the parent. However, if the lookup was caching a connection to a database,
4622 the connection was closed, and the second delivery process was likely to
4623 see errors such as "PGSQL: query failed: server closed the connection
4624 unexpectedly". The problem has been fixed by closing all cached lookups
4625 in a queue runner before running a delivery process.
4627 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4628 seem to have the "const" qualifier which it has on other OS. I've
4631 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4632 *of the same type* (client or server) with the same public name that an
4633 error should be diagnosed.
4635 9. When Exim looked up a host name for an IP address, but failed to find the
4636 original IP address when looking up the host name (a safety check), it
4637 output the message "<ip address> does not match any IP for NULL", which was
4638 confusing, to say the least. The bug was that the host name should have
4639 appeared instead of "NULL".
4641 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4642 user that is built into the binary, and the -C or -D options is used, root
4643 privilege is dropped before the configuration file is read. In addition,
4644 logging is switched to stderr instead of the normal log files. If the
4645 configuration then re-defines the Exim user, the unprivileged environment
4646 is probably not what is expected, so Exim logs a panic warning message (but
4649 However, if deliver_drop_privilege is set, the unprivileged state may well
4650 be exactly what is intended, so the warning has been cut out in that case,
4651 and Exim is allowed to try to write to its normal log files.
4657 1. smtp_return_error_details was not giving details for temporary sender
4658 or receiver verification errors.
4660 2. Diagnose a configuration error if two authenticators have the same public
4663 3. Exim used not to create the message log file for a message until the first
4664 delivery attempt. This could be confusing when incoming messages were held
4665 for policy or load reasons. The message log file is now created at the time
4666 the message is received, and an initial "Received" line is written to it.
4668 4. The automatically generated man page for command line options had a minor
4669 bug that caused no ill effects; however, a more serious problem was that
4670 the procedure for building the man page automatically didn't always
4671 operate. Consequently, release 4.20 contains an out-of-date version. This
4672 shouldn't happen again.
4674 5. When building Exim with embedded Perl support, the script that builds the
4675 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4676 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4678 6. The freeze_tell option was not being used for messages that were frozen on
4679 arrival, either by an ACL or by local_scan().
4681 7. Added the smtp_incomplete_transaction log selector.
4683 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4684 was accepting AUTH without a new EHLO.
4686 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4687 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4690 10. Logging of TCP/IP connections (when configured) now happens in the main
4691 daemon process instead of the child process, so that the TCP/IP connection
4692 count is more accurate (but it can never be perfect).
4694 11. The use of "drop" in a nested ACL was not being handled correctly in the
4695 outer ACL. Now, if condition failure induced by the nested "drop" causes
4696 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4697 or "require"), the connection is dropped.
4699 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4700 that yield "discard" can now be used with an "accept" or a "discard" verb,
4701 but an error is generated for any others (because I can't see a useful way
4702 to define what should happen).
4704 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4705 are now processed in the same way as lines in the Exim configuration file.
4706 In particular, continuation lines are supported.
4708 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4710 15. Added -ti meaning -t -i.
4712 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4713 domains, and warn by logging if others are found.
4715 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4716 returned from GIFCONF when Exim is trying to find the list of interfaces on
4717 a host. The code in os.c has been modified to copy each ifreq to an aligned
4718 structure in all cases.
4720 Also, in some cases, the returned ifreq's were being copied to a 'struct
4721 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4722 means the last couple of bytes of an IPv6 address could be chopped if the
4723 ifreq contained only a normal sockaddr (14 bytes storage).
4725 18. Named domain lists were not supported in the hosts_treat_as_local option.
4726 An entry such as +xxxx was not recognized, and was treated as a literal
4729 19. Ensure that header lines added by a DATA ACL are included in the reject log
4730 if the ACL subsequently rejects the message.
4732 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4733 MD5 (which is deprecated).
4735 21. When testing a filter file using -bf, Exim was writing a message when it
4736 took the sender from a "From " line in the message, but it was not doing so
4737 when it took $return_path from a Return-Path: header line. It now does.
4739 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4740 with a valid header line field name (a series of printing characters
4741 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4743 23. Changed "disc" in the source to "disk" to conform to the documentation and
4744 the book and for uniformity.
4746 24. Ignore Sendmail's -Ooption=value command line item.
4748 25. When execve() failed while trying to run a command in a pipe transport,
4749 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4750 could be confused with a return value of 69 from the command itself. This
4751 has been changed to 127, the value the shell returns if it is asked to run
4752 a non-existent command. The wording for the related log line suggests a
4753 non-existent command as the problem.
4755 26. If received_header_text expands to an empty string, do not add a Received:
4756 header line to the message. (Well, it adds a token one on the spool, but
4757 marks it "old" so that it doesn't get used or transmitted.)
4759 27. Installed eximstats 1.28 (addition of -nt option).
4761 28. There was no check for failure on the call to getsockname() in the daemon
4762 code. This can fail if there is a shortage of resources on the system, with
4763 ENOMEM, for example. A temporary error is now given on failure.
4765 29. Contrary to the C standard, it seems that in some environments, the
4766 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4767 program. Exim now does this explicitly; it affects the formatting of
4768 timestamps using strftime().
4770 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4771 complaints. I've now initialized all the variables, to avoid this.
4773 32. Header lines added by a system filter were not being "seen" during
4774 transport-time rewrites.
4776 33. The info_callback() function passed to OpenSSL is set up with type void
4777 (*)(SSL *, int, int), as described somewhere. However, when calling the
4778 function (actually a macro) that sets it up, the type void(*)() is
4779 expected. I've put in a cast to prevent warnings from picky compilers.
4781 34. If a DNS black list lookup found a CNAME record, but there were no A
4782 records associated with the domain it pointed at, Exim crashed.
4784 35. If a DNS black list lookup returned more than one A record, Exim ignored
4785 all but the first. It now scans all returned addresses if a particular IP
4786 value is being sought. In this situation, the contents of the
4787 $dnslist_value variable are a list of all the addresses, separated by a
4790 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4791 to accept a host name and all its aliases if the forward lookup for any of
4792 them yielded the IP address of the incoming connection. Now it accepts only
4793 those names whose forward lookup yields the correct IP address. Any other
4794 names are discarded. This closes a loophole whereby a rogue DNS
4795 administrator could create reverse DNS records to break through a
4796 wildcarded host restriction in an ACL.
4798 37. If a user filter or a system filter that ran in a subprocess used any of
4799 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4800 the wrong values were passed to the pipe command ($thisaddress had the
4801 value of $0, $0 had the value of $1, etc). This bug was introduced by
4802 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4804 38. Improved the line breaking for long SMTP error messages from ACLs.
4805 Previously, if there was no break point between 40 and 75 characters, Exim
4806 left the rest of the message alone. Two changes have been made: (a) I've
4807 reduced the minimum length to 35 characters; (b) if it can't find a break
4808 point between 35 and 75 characters, it looks ahead and uses the first one
4809 that it finds. This may give the occasional overlong line, but at least the
4810 remaining text gets split now.
4812 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4813 file descriptors might be low, and that setting 1000 would always raise it.
4814 It turns out that in some environments, the limit is already over 1000 and
4815 that lowering it causes trouble. So now Exim takes care not to decrease it.
4817 40. When delivering a message, the value of $return_path is set to $sender_
4818 address at the start of routing (routers may change the value). By an
4819 oversight, this default was not being set up when an address was tested by
4820 -bt or -bv, which affected the outcome if any router or filter referred to
4823 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4824 log only when "message" or "log_message" are set. However, if one of the
4825 conditions was an address verification, or a call to a nested ACL, the
4826 messages generated by the underlying test were being passed through. This
4827 no longer happens. The underlying message is available in $acl_verify_
4828 message for both "message" and "log_message" expansions, so it can be
4829 passed through if needed.
4831 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4832 new expansion $bh_ to give the encoded byte string without charset
4833 translation. Translation happens only if iconv() is available; HAVE_ICONV
4834 indicates this at build time. HEADERS_CHARSET gives the charset to
4835 translate to; headers_charset can change it in the configuration, and
4836 "headers charset" can change it in an individual filter file.
4838 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4839 that creates RFC 2047 encoded "words" labels them as that charset instead
4840 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4841 expansion operator; (ii) when Exim creates a From: line for a local
4842 message; (iii) when a header line is rewritten to include a "phrase" part.
4844 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4845 buggy, causing it to skip the first lines of messages whose message ID
4846 ended in 'D'. This would not have bitten before Exim release 4.14, because
4847 message IDs were unlikely to end in 'D' before then. The effect was to have
4848 incorrect size information for certain domains.
4850 45. #include "config.h" was missing at the start of the crypt16.c module. This
4851 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4854 46. If there was a timeout during a "random" callout check, Exim treated it as
4855 a failure of the random address, and carried on sending RSET and the real
4856 address. If the delay was just some slowness somewhere, the response to the
4857 original RCPT would be taken as a response to RSET and so on, causing
4858 mayhem of various kinds.
4860 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4861 when I implemented it. It didn't allow for the fact that some option values
4862 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4863 the right test for positive values.
4865 48. Domain names in DNS records are case-independent. Exim always looks them up
4866 in lower case. Some resolvers return domain names in exactly the case they
4867 appear in the zone file, that is, they may contain uppercase letters. Not
4868 all resolvers do this - some return always lower case. Exim was treating a
4869 change of case by a resolver as a change of domain, similar to a widening
4870 of a domain abbreviation. This triggered its re-routing code and so it was
4871 trying to route what was effectively the same domain again. This normally
4872 caused routing to fail (because the router wouldn't handle the domain
4873 twice). Now Exim checks for this case specially, and just changes the
4874 casing of the domain that it ultimately uses when it transmits the message
4877 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4880 50. If a filter generated a file delivery with a non-absolute name (possible if
4881 no home directory exists for the router), the forbid_file option was not
4884 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4885 the existing equality matching.
4887 52. Exim was using ints instead of ino_t variables in some places where it was
4888 dealing with inode numbers.
4890 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4891 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4892 called TMPDIR, and if it finds it is different, it changes its value.
4894 54. The smtp_printf() function is now made available to local_scan() so
4895 additional output lines can be written before returning. There is also an
4896 smtp_fflush() function to enable the detection of a dropped connection.
4897 The variables smtp_input and smtp_batched_input are exported to
4900 55. Changed the default runtime configuration: the message "Unknown user"
4901 has been removed from the ACL, and instead placed on the localuser router,
4902 using the cannot_route_message feature. This means that any verification
4903 failures that generate their own messages won't get overridden. Similarly,
4904 the "Unrouteable address" message that was in the ACL for unverifiable
4905 relay addresses has also been removed.
4907 56. Added hosts_avoid_esmtp to the smtp transport.
4909 57. The exicyclog script was not checking for the esoteric option
4910 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4911 will work only if exicyclog is run under the appropriate euid.
4913 58. Following a discussion on the list, the rules by which Exim recognises line
4914 endings on incoming messages have been changed. The -dropcr and drop_cr
4915 options are now no-ops, retained only for backwards compatibility. The
4916 following line terminators are recognized: LF CRLF CR. However, special
4917 processing applies to CR:
4919 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4920 nor a local message in the state where . is a terminator.
4922 (ii) If a bare CR is encountered in a header line, an extra space is added
4923 after the line terminator so as not to end the header. The reasoning
4924 behind this is that bare CRs in header lines are most likely either
4925 to be mistakes, or people trying to play silly games.
4927 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4928 was being incorrectly given as 18 bytes larger than it should have been.
4929 This is a VOB (very old bug).
4931 60. This may never have affected anything current, but just in case it has:
4932 When the local host is found other than at the start of a list of hosts,
4933 the local host, those with the same MX, and any that follow, are discarded.
4934 When the list in question was part of a longer list of hosts, the following
4935 hosts (not currently being processed) were also being discarded. This no
4936 longer happens. I'm not sure if this situation could ever has previously
4939 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4942 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4943 header. This is something that is recommended in a new Internet Draft, and
4944 is something that is documented as being done by Sendmail. There are two
4945 possible values. For messages generated by the autoreply transport, Exim
4948 Auto-Submitted: auto-replied
4950 whereas for all other generated messages (e.g. bounces) it adds
4952 Auto-Submitted: auto-generated
4954 63. The "personal" condition in filters now includes a test for the
4955 Auto-Submitted: header. If it contains the string "auto-" the message it
4956 not considered personal.
4958 64. Added rcpt_include_affixes as a generic transport option.
4960 65. Added queue_only_override (default true).
4962 66. Added the syslog_duplication option.
4964 67. If what should have been the first header line of a message consisted of
4965 a space followed by a colon, Exim was mis-interpreting it as a header line.
4966 It isn't of course - it is syntactically invalid and should therefore be
4967 treated as the start of the message body. The misbehaviour could have
4968 caused a number of strange effects, including loss of data in subsequent
4969 header lines, and spool format errors.
4971 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4972 client host had authenticated. This control can now be exercised by an ACL
4973 for more flexibility.
4975 69. By default, callouts do not happen when testing with -bh. There is now a
4976 variant, -bhc, which does actually run the callout code, including
4977 consulting and updating the callout cache.
4979 70. Added support for saslauthd authentication, courtesy of Alexander
4982 71. If statvfs() failed on the spool or log directories while checking their
4983 size for availability, Exim confusingly gave the error "space shortage".
4984 Furthermore, in debugging mode it crashed with a floating point exception.
4985 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4986 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4987 serious problem, Exim now writes to the main and panic logs when this
4988 happens, with details of the failure. It then refuses to accept the
4989 incoming message, giving the message "spool directory problem" or "log
4990 directory problem" with a 421 code for SMTP messages.
4992 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4993 0, 1, and 2 exist, because some OS complain for execs without them (see
4994 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4995 descriptors. However, the code omitted to check that the open succeeded,
4996 causing mysterious errors if for some reason the permissions on /dev/null
4997 got screwed. Now Exim writes a message to the main and panic logs, and
4998 bombs out if it can't open /dev/null.
5000 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5001 interact so that it is all more flexible. It is supposed to remain
5002 backwards compatible. Also added extra_local_interfaces.
5004 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5005 to bomb out with an assertion failure - to the client this appears as a
5006 connection drop. This problem occurs in the part of the code that was taken
5007 from the Samba project. Fortunately, the assertion is in a very simple
5008 function, so I have fixed this by reproducing the function inline in the
5009 one place where it is called, and arranging for authentication to fail
5010 instead of killing the process with assert().
5012 75. The SPA client code was not working when the server requested OEM rather
5013 than Unicode encoding.
5015 76. Added code to make require_files with a specific uid setting more usable in
5016 the case where statting the file as root fails - usually a non-root-mounted
5017 NFS file system. When this happens and the failure is EACCES, Exim now
5018 forks a subprocess and does the per-uid checking as the relevant uid.
5020 77. Added process_log_path.
5022 78. If log_file_path was not explicitly set, a setting of check_log_space or
5023 check_log_inodes was ignored.
5025 79. If a space check for the spool or log partitions fails, the incident is now
5026 logged. Of course, in the latter case the data may get lost...
5028 80. Added the %p formatting code to string_format() so that it can be used to
5029 print addresses in debug_print(). Adjusted all the address printing in the
5030 debugging in store.c to use %p rather than %d.
5032 81. There was a concern that a line of code in smtp_in.c could overflow a
5033 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5034 initially expressed, the concern was not well-founded, because trailing
5035 spaces are removed early. However, if the trailing spaces were followed by
5036 a NULL, they did not get removed, so the overflow was possible. Two fixes
5039 (a) I re-wrote the offending code in a cleaner fashion.
5040 (b) If an incoming SMTP command contains a NULL character, it is rejected
5043 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5044 runs initgroups(), so that if the Exim user is in any additional groups,
5045 they will be used during message reception.
5051 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob