1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.603 2010/03/05 16:05:02 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
22 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
24 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
26 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
28 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
30 NM/04 Bugzilla 915: Flag broken perl installation during build.
36 TK/01 Added patch by Johannes Berg that expands the main option
37 "spamd_address" if it starts with a dollar sign.
39 TK/02 Write list of recipients to X-Envelope-Sender header when building
40 the mbox-format spool file for content scanning (suggested by Jakob
43 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
44 (http://www.dcc-servers.net/) support via dccifd. Activated by
45 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
47 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
48 by Mark Daniel Reidel <mr@df.eu>.
50 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
51 When building exim an external PCRE library is now needed -
52 PCRE is a system library on the majority of modern systems.
53 See entry on PCRE_LIBS in EDITME file.
55 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
56 conversation. Added nologin parameter to request.
57 Patch contributed by Kirill Miazine
59 TF/01 Do not log submission mode rewrites if they do not change the address.
61 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
63 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
64 log files in place. Contributed by Roberto Lima
66 NM/04 Bugzilla 667: close socket used by dovecot authenticator
68 TF/03 Bugzilla 615: When checking the local_parts router precondition
69 after a local_part_suffix or local_part_prefix option, Exim now
70 does not use the address's named list lookup cache, since this
71 contains cached lookups for the whole local part.
73 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
74 Robert Millan. Documentation is in experimental-spec.txt
76 TF/04 Bugzilla 668: Fix parallel build (make -j).
78 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
80 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
81 Patch provided by Jan Srzednicki
83 TF/05 Leading white space used to be stripped from $spam_report which
84 wrecked the formatting. Now it is preserved.
86 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
87 that they are available at delivery time.
89 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
91 TF/08 TLS error reporting now respects the incoming_interface and
92 incoming_port log selectors.
94 TF/09 Produce a more useful error message if an SMTP transport's hosts
95 setting expands to an empty string.
97 NM/06 Bugzilla 744: EXPN did not work under TLS.
98 Patch provided by Phil Pennock
100 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
101 Patch provided by Richard Godbee
103 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
104 acl_smtp_notquit, added index entry.
106 NM/09 Bugzilla 787: Potential buffer overflow in string_format
107 Patch provided by Eugene Bujak
109 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
110 Patch provided by Maxim Dounin
112 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
113 Patch provided by Phil Pennock
115 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
117 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
118 Patch provided by Brad "anomie" Jorsch
120 NM/14 Bugzilla 622: Added timeout setting to transport filter.
121 Patch provided by Dean Brooks
123 TK/05 Add native DKIM support (does not depend on external libraries).
125 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
126 Patch provided by Graeme Fowler
128 NM/16 Bugzilla 851: Documentation example syntax fix.
130 NM/17 Changed NOTICE file to remove references to embedded PCRE.
132 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
134 NM/19 Bugzilla 745: TLS version reporting
135 Patch provided by Phil Pennock
137 NM/20 Bugzilla 167: bool: condition support
138 Patch provided by Phil Pennock
140 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
141 Patch provided by Phil Pennock
143 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
144 Patch provided by Brad "anomie" Jorsch
146 NM/23 Bugzilla 687: Fix misparses in eximstats
147 Patch provided by Heiko Schlittermann
149 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
150 Patch provided by Heiko Schlittermann
152 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
153 plus update to original patch.
155 NM/26 Bugzilla 799: Documentation correction for ratelimit
157 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
158 Patch provided by David Brownlee
160 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
162 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
164 NM/30 Bugzilla 888: TLS documentation bugfixes
166 NM/31 Bugzilla 896: Dovecot buffer overrun fix
168 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
169 Unlike the original bugzilla I have changed all shell scripts in src tree
171 NM/33 Bugzilla 898: Transport filter timeout fix
172 Patch by Todd Rinaldo
174 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
175 Patch by Serge Demonchaux
177 NM/35 Bugzilla 39: Base64 decode bug fixes
178 Patch by Jakob Hirsch
180 NM/36 Bugzilla 909: Correct connect() call in dcc code
182 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
184 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
186 NM/39 Bugzilla 911: Fixed MakeLinks build script
192 TK/01 Add preliminary DKIM support. Currently requires a forked version of
193 ALT-N's libdkim that I have put here:
194 http://duncanthrax.net/exim-experimental/
196 Note to Michael Haardt: I had to rename some vars in sieve.c. They
197 were called 'true' and it seems that C99 defines that as a reserved
198 keyword to be used with 'bool' variable types. That means you could
199 not include C99-style headers which use bools without triggering
200 build errors in sieve.c.
202 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
203 as mailq or other aliases. Changed the --help handling significantly
204 to do whats expected. exim_usage() emits usage/help information.
206 SC/01 Added the -bylocaldomain option to eximstats.
208 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
210 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
212 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
218 PH/01 Another patch from the Sieve maintainer.
220 PH/02 When an IPv6 address is converted to a string for single-key lookup
221 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
222 dots are used instead of colons so that keys in lsearch files need not
223 contain colons. This was done some time before quoting was made available
224 in lsearch files. However, iplsearch files do require colons in IPv6 keys
225 (notated using the quote facility) so as to distinguish them from IPv4
226 keys. This meant that lookups for IP addresses in host lists did not work
227 for iplsearch lookups.
229 This has been fixed by arranging for IPv6 addresses to be expressed with
230 colons if the lookup type is iplsearch. This is not incompatible, because
231 previously such lookups could never work.
233 The situation is now rather anomolous, since one *can* have colons in
234 ordinary lsearch keys. However, making the change in all cases is
235 incompatible and would probably break a number of configurations.
237 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
240 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
241 conversion specification without a maximum field width, thereby enabling
242 a rogue spamd server to cause a buffer overflow. While nobody in their
243 right mind would setup Exim to query an untrusted spamd server, an
244 attacker that gains access to a server running spamd could potentially
245 exploit this vulnerability to run arbitrary code as the Exim user.
247 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
248 $primary_hostname instead of what libspf2 thinks the hosts name is.
250 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
251 a directory entry by the name of the lookup key. Previously, if a
252 symlink pointed to a non-existing file or a file in a directory that
253 Exim lacked permissions to read, a lookup for a key matching that
254 symlink would fail. Now it is enough that a matching directory entry
255 exists, symlink or not. (Bugzilla 503.)
257 PH/03 The body_linecount and body_zerocount variables are now exported in the
260 PH/04 Added the $dnslist_matched variable.
262 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
263 This means they are set thereafter only if the connection becomes
266 PH/06 Added the client_condition to authenticators so that some can be skipped
267 by clients under certain conditions.
269 PH/07 The error message for a badly-placed control=no_multiline_responses left
270 "_responses" off the end of the name.
272 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
274 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
275 (without spaces) instead of just copying the configuration text.
277 PH/10 Added the /noupdate option to the ratelimit ACL condition.
279 PH/11 Added $max_received_linelength.
281 PH/12 Added +ignore_defer and +include_defer to host lists.
283 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
284 way in which PCRE > 7.0 is built.
286 PH/14 Implemented queue_only_load_latch.
288 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
289 MAIL command. The effect was to mangle the value on 64-bit systems.
291 PH/16 Another patch from the Sieve maintainer.
293 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
295 PH/18 If a system quota error occurred while trying to create the file for
296 a maildir delivery, the message "Mailbox is full" was not appended to the
297 bounce if the delivery eventually timed out. Change 4.67/27 below applied
298 only to a quota excession during the actual writing of the file.
300 PH/19 It seems that peer DN values may contain newlines (and other non-printing
301 characters?) which causes problems in log lines. The DN values are now
302 passed through string_printing() before being added to log lines.
304 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
305 and InterBase are left for another time.)
307 PH/21 Added message_body_newlines option.
309 PH/22 Guard against possible overflow in moan_check_errorcopy().
311 PH/23 POSIX allows open() to be a macro; guard against that.
313 PH/24 If the recipient of an error message contained an @ in the local part
314 (suitably quoted, of course), incorrect values were put in $domain and
315 $local_part during the evaluation of errors_copy.
321 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
322 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
325 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
326 issue a MAIL command.
328 PH/02 In an ACL statement such as
330 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
332 if a client was not listed at all, or was listed with a value other than
333 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
334 the condition was not true (as it should be), so access was not denied.
335 The bug was that the ! inversion was incorrectly passed on to the second
336 item. This has been fixed.
338 PH/03 Added additional dnslists conditions == and =& which are different from
339 = and & when the dns lookup returns more than one IP address.
341 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
342 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
344 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
345 FSYNC, which compiles an option called disable_fsync that allows for
346 bypassing fsync(). The documentation is heavily laced with warnings.
348 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
350 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
351 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
352 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
353 including adding "make clean"; (3) Added -fPIC when compiling the test
354 dynamically loaded module, to get rid of a warning.
356 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
357 message fails, move_frozen_messages = true and ignore_bounce_errors_after
358 = 0s. The bug is otherwise harmless.
360 PH/07 There was a bug in the dovecot authenticator such that the value of
361 $auth1 could be overwritten, and so not correctly preserved, after a
362 successful authentication. This usually meant that the value preserved by
363 the server_setid option was incorrect.
365 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
367 PH/09 Installed PCRE release 7.0.
369 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
370 run for batched SMTP input. It is now run at the start of every message
371 in the batch. While fixing this I discovered that the process information
372 (output by running exiwhat) was not always getting set for -bs and -bS
373 input. This is fixed, and it now also says "batched" for BSMTP.
375 PH/11 Added control=no_pipelining.
377 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
378 patch, slightly modified), and move the expansion of helo_data till after
379 the connection is made in the smtp transport (so it can use these
382 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
384 PH/14 Added log_selector = +pid.
386 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
388 PH/16 Add ${if forany and ${if forall.
390 PH/17 Added dsn_from option to vary the From: line in DSNs.
392 PH/18 Flush SMTP output before performing a callout, unless control =
393 no_callout_flush is set.
395 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
396 was true (the default) a successful delivery failed to delete the retry
397 item, thus causing premature timeout of the address. The bug is now
400 PH/20 Added hosts_avoid_pipelining to the smtp transport.
402 PH/21 Long custom messages for fakedefer and fakereject are now split up
403 into multiline reponses in the same way that messages for "deny" and
404 other ACL rejections are.
406 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
407 with slight modification.
409 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
410 draft, changing the syntax and factoring some duplicate code".
412 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
413 for deliveries of the second and subsequent messages over the same SMTP
416 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
417 ${reduce, with only minor "tidies".
419 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
421 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
422 expansion side effects.
424 PH/27 When a message times out after an over-quota error from an Exim-imposed
425 quota, the bounce message says "mailbox is full". This message was not
426 being given when it was a system quota that was exceeded. It now should
429 MH/03 Made $recipients available in local_scan(). local_scan() already has
430 better access to the recipient list through recipients_list[], but
431 $recipients can be useful in postmaster-provided expansion strings.
433 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
434 in the case of a MAIL command with additional options following the
435 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
436 were accidentally chopped off.
438 PH/29 SMTP synchronization checks are implemented when a command is read -
439 there is a check that no more input is waiting when there shouldn't be
440 any. However, for some commands, a delay in an ACL can mean that it is
441 some time before the response is written. In this time, more input might
442 arrive, invalidly. So now there are extra checks after an ACL has run for
443 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
444 pipelining has not been advertised.
446 PH/30 MH's patch to allow iscntrl() characters to be list separators.
448 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
449 returned in the SMTP response when smtp_return_error_details was false.
452 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
453 instead of the C I/O that was originally supplied, because problems were
456 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
457 Exim which did not show up earlier: it was assuming that a call to
458 SSL_CTX_set_info_callback() might give an error value. In fact, there is
459 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
460 was a macro that became an assignment, so it seemed to work. This has
461 changed to a proper function call with a void return, hence the compile
462 error. Exim's code has been fixed.
464 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
467 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
469 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
471 PH/37 If a message is not accepted after it has had an id assigned (e.g.
472 because it turns out to be too big or there is a timeout) there is no
473 "Completed" line in the log. When some messages of this type were
474 selected by exigrep, they were listed as "not completed". Others were
475 picked up by some special patterns. I have improved the selection
476 criteria to be more general.
478 PH/38 The host_find_failed option in the manualroute router can now be set
479 to "ignore", to completely ignore a host whose IP address cannot be
480 found. If all hosts are ignored, the behaviour is controlled by the new
481 host_all_ignored option.
483 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
484 homing or because of multiple MX records with /mx) generated more than
485 one IP address, and the following item turned out to be the local host,
486 all the secondary addresses of the first item were incorrectly removed
487 from the list, along with the local host and any following hosts (which
488 is what is supposed to happen).
490 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
491 whoever called Exim into the -H file. In the case of the daemon it was
492 behaving confusingly. When first started, it used values for whoever
493 started the daemon, but after a SIGHUP it used the Exim user (because it
494 calls itself on a restart). I have changed the code so that it now always
497 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
498 message are rejected with the same error (e.g. no authentication or bad
499 sender address), and a DATA command is nevertheless sent (as can happen
500 with PIPELINING or a stupid MUA), the error message that was given to the
501 RCPT commands is included in the rejection of the DATA command. This is
502 intended to be helpful for MUAs that show only the final error to their
505 PH/42 Another patch from the Sieve maintainer.
507 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
508 Eximstats - Fixed some broken HTML links and added missing column headers
510 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
511 columns for Rejects, Temp Rejects, Ham, and Spam rows.
513 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
515 PH/43 Yet another patch from the Sieve maintainer.
517 PH/44 I found a way to check for a TCP/IP connection going away before sending
518 the response to the final '.' that terminates a message, but only in the
519 case where the client has not sent further data following the '.'
520 (unfortunately, this is allowed). However, in many cases there won't be
521 any further data because there won't be any more messages to send. A call
522 to select() can be used: if it shows that the input is "ready", there is
523 either input waiting, or the socket has been closed. An attempt to read
524 the next input character can distinguish the two cases. Previously, Exim
525 would have sent an OK response which the client would never have see.
526 This could lead to message repetition. This fix should cure that, at
527 least in a lot of common cases.
529 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
530 advertised in response to EHLO.
536 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
537 fixed by 4.65/MH/01 (is this a record?) are fixed:
539 (i) An empty string was always treated as zero by the numeric comparison
540 operators. This behaviour has been restored.
542 (ii) It is documented that the numeric comparison operators always treat
543 their arguments as decimal numbers. This was broken in that numbers
544 starting with 0 were being interpreted as octal.
546 While fixing these problems I realized that there was another issue that
547 hadn't been noticed. Values of message_size_limit (both the global option
548 and the transport option) were treated as octal if they started with 0.
549 The documentation was vague. These values are now always treated as
550 decimal, and I will make that clear in the documentation.
556 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
557 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
560 MH/01 Don't check that the operands of numeric comparison operators are
561 integers when their expansion is in "skipping" mode (fixes bug
562 introduced by 4.64-PH/07).
564 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
565 child addresses, Exim now panics and dies. Previously, because the count
566 is held in a short int, deliveries were likely to be lost. As such a
567 large number of recipients for a single message is ridiculous
568 (performance will be very, very poor), I have chosen to impose a limit
569 rather than extend the field.
575 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
576 leftover -K file (the existence of which was triggered by #402).
577 While we were at it, introduced process PID as part of the -K
578 filename. This should rule out race conditions when creating
581 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
582 processing considerably. Previous code took too long for large mails,
583 triggering a timeout which in turn triggers #401.
585 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
586 in the DK code in transports.c. sendfile() is not really portable,
587 hence the _LINUX specificness.
589 TF/01 In the add_headers option to the mail command in an Exim filter,
590 there was a bug that Exim would claim a syntax error in any
591 header after the first one which had an odd number of characters
594 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
595 callout verification, Exim cached a "reject" for the entire domain. This
596 is correct for most verifications, but it is not correct for a recipient
597 verification with use_sender or use_postmaster set, because in that case
598 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
599 case of MAIL FROM:<> rejection from other early rejections (e.g.
600 rejection of HELO). When verifying a recipient using a non-null MAIL
601 address, the cache is ignored if it shows MAIL FROM:<> rejection.
602 Whatever the result of the callout, the value of the domain cache is
603 left unchanged (for any other kind of callout, getting as far as trying
604 RCPT means that the domain itself is ok).
606 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
609 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
610 manifest itself as EPIPE rather than ECONNECT. When tidying away a
611 session, the daemon ignores ECONNECT errors and logs others; it now
612 ignores EPIPE as well.
614 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
615 (quoted-printable decoding).
617 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
618 later the small subsequent patch to fix an introduced bug.
620 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
622 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
624 PH/08 An error is now given if message_size_limit is specified negative.
626 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
627 to be given (somewhat) arbitrary names.
629 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
632 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
633 miscellaneous code fixes
635 PH/10 Added the log_reject_target ACL modifier to specify where to log
638 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
639 hostname. This is wrong, because it relates to the incoming message (and
640 probably the interface on which it is arriving) and not to the outgoing
641 callout (which could be using a different interface). This has been
642 changed to use the value of the helo_data option from the smtp transport
643 instead - this is what is used when a message is actually being sent. If
644 there is no remote transport (possible with a router that sets up host
645 addresses), $smtp_active_hostname is used.
647 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
648 tweaks were necessary in order to get it to work (see also 21 below):
649 (a) The code assumed that strncpy() returns a negative number on buffer
650 overflow, which isn't the case. Replaced with Exim's string_format()
652 (b) There were several signed/unsigned issues. I just did the minimum
653 hacking in of casts. There is scope for a larger refactoring.
654 (c) The code used strcasecmp() which is not a standard C function.
655 Replaced with Exim's strcmpic() function.
656 (d) The code set only $1; it now sets $auth1 as well.
657 (e) A simple test gave the error "authentication client didn't specify
658 service in request". It would seem that Dovecot has changed its
659 interface. Fortunately there's a specification; I followed it and
660 changed what the client sends and it appears to be working now.
662 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
665 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
666 address A is aliased to B and C, where B exists and C does not. Without
667 -v the output is "A verified" because verification stops after a
668 successful redirection if more than one address is generated. However,
669 with -v the child addresses are also verified. Exim was outputting "A
670 failed to verify" and then showing the successful verification for C,
671 with its parentage. It now outputs "B failed to verify", showing B's
672 parentage before showing the successful verification of C.
674 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
675 look up a TXT record in a specific list after matching in a combined
678 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
679 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
680 they consult the DNS. I had assumed they would set it the way they
681 wanted; and indeed my experiments on Linux seem to show that in some
682 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
683 To be on the safe side, however, I have now made the interface to
684 host_find_byname() similar to host_find_bydns(), with an argument
685 containing the DNS resolver options. The host_find_byname() function now
686 sets these options at its start, just as host_find_bydns() does. The smtp
687 transport options dns_qualify_single and dns_search_parents are passed to
688 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
689 of host_find_byname() use the default settings of RES_DEFNAMES
690 (qualify_single) but not RES_DNSRCH (search_parents).
692 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
693 spool_read_header() do less string testing, by means of a preliminary
694 switch on the second character of optional "-foo" lines. (This is
695 overdue, caused by the large number of possibilities that now exist.
696 Originally there were few.) While I was there, I also converted the
697 str(n)cmp tests so they don't re-test the leading "-" and the first
698 character, in the hope this might squeeze out yet more improvement.
700 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
701 flag allowing group syntax was set by the header_syntax check but not
702 turned off, possible causing trouble later; (2) The flag was not being
703 set at all for the header_verify test, causing "group"-style headers to
704 be rejected. I have now set it in this case, and also caused header_
705 verify to ignore an empty address taken from a group. While doing this, I
706 came across some other cases where the code for allowing group syntax
707 while scanning a header line wasn't quite right (mostly, not resetting
708 the flag correctly in the right place). These bugs could have caused
709 trouble for malformed header lines. I hope it is now all correct.
711 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
712 with the "reply" argument non-NULL. The code, however (which originally
713 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
714 but it didn't always do it. This confused somebody who was copying the
715 code for some other use. I have removed all the tests.
717 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
718 feature that was used to support insecure browsers during the U.S. crypto
719 embargo. It requires special client support, and Exim is probably the
720 only MTA that supported it -- and would never use it because real RSA is
721 always available. This code has been removed, because it had the bad
722 effect of slowing Exim down by computing (never used) parameters for the
723 RSA_EXPORT functionality.
725 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
726 authenticator to fail if there's a tab character in the incoming data
727 (there should never be unless someone is messing about, as it's supposed
728 to be base64-encoded). Also added, on Timo's advice, the "secured" option
729 if the connection is using TLS or if the remote IP is the same as the
730 local IP, and the "valid-client-cert option" if a client certificate has
733 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
734 authenticators. This can be used for authorization after authentication
735 succeeds. (In the case of plaintext, it servers for both authentication
738 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
739 if any retry times were supplied.
741 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
742 connection, where there is no client IP address to check. In this
743 situation, the verify now always succeeds.
745 PH/25 Applied John Jetmore's -Mset patch.
747 PH/26 Added -bem to be like -Mset, but loading a message from a file.
749 PH/27 In a string expansion for a processed (not raw) header when multiple
750 headers of the same name were present, leading whitespace was being
751 removed from all of them, but trailing whitespace was being removed only
752 from the last one. Now trailing whitespace is removed from each header
753 before concatenation. Completely empty headers in a concatenation (as
756 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
757 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
759 PH/29 [Removed. This was a change that I later backed out, and forgot to
760 correct the ChangeLog entry (that I had efficiently created) before
761 committing the later change.]
763 PH/30 Exim was sometimes attempting to deliver messages that had suffered
764 address errors (4xx response to RCPT) over the same connection as other
765 messages routed to the same hosts. Such deliveries are always "forced",
766 so retry times are not inspected. This resulted in far too many retries
767 for the affected addresses. The effect occurred only when there were more
768 hosts than the hosts_max_try setting in the smtp transport when it had
769 the 4xx errors. Those hosts that it had tried were not added to the list
770 of hosts for which the message was waiting, so if all were tried, there
771 was no problem. Two fixes have been applied:
773 (i) If there are any address or message errors in an SMTP delivery, none
774 of the hosts (tried or untried) are now added to the list of hosts
775 for which the message is waiting, so the message should not be a
776 candidate for sending over the same connection that was used for a
777 successful delivery of some other message. This seems entirely
778 reasonable: after all the message is NOT "waiting for some host".
779 This is so "obvious" that I'm not sure why it wasn't done
780 previously. Hope I haven't missed anything, but it can't do any
781 harm, as the worst effect is to miss an optimization.
783 (ii) If, despite (i), such a delivery is accidentally attempted, the
784 routing retry time is respected, so at least it doesn't keep
785 hammering the server.
787 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
788 in ${readsocket because some servers need this prod.
790 PH/32 Added some extra debug output when updating a wait-xxx database.
792 PH/33 The hint "could be header name not terminated by colon", which has been
793 given for certain expansion errors for a long time, was not being given
794 for the ${if def:h_colon_omitted{... case.
796 PH/34 The spec says: "With one important exception, whenever a domain list is
797 being scanned, $domain contains the subject domain." There was at least
798 one case where this was not true.
800 PH/35 The error "getsockname() failed: connection reset by peer" was being
801 written to the panic log as well as the main log, but it isn't really
802 panic-worthy as it just means the connection died rather early on. I have
803 removed the panic log writing for the ECONNRESET error when getsockname()
806 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
807 runs only) independently of the message's sender address. This meant
808 that, if the 4xx error was in fact related to the sender, a different
809 message to the same recipient with a different sender could confuse
810 things. In particualar, this can happen when sending to a greylisting
811 server, but other circumstances could also provoke similar problems.
812 I have changed the default so that the retry time for these errors is now
813 based a combination of the sender and recipient addresses. This change
814 can be overridden by setting address_retry_include_sender=false in the
817 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
818 remote server are returned as part of bounce messages. This was not
819 happening for LMTP over a pipe (the lmtp transport), but now it is the
820 same for both kinds of LMTP.
822 PH/38 Despite being documented as not happening, Exim was rewriting addresses
823 in header lines that were in fact CNAMEs. This is no longer the case.
825 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
826 and queue runs started by the daemon processed all messages. This has
827 been fixed so that -R and -S can now usefully be given with -q<time>.
829 PH/40 Import PCRE release 6.7 (fixes some bugs).
831 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
833 PH/42 Give an error if -q is specified more than once.
835 PH/43 Renamed the variables $interface_address and $interface_port as
836 $received_ip_address and $received_port, to make it clear that these
837 values apply to message reception, and not to the outgoing interface when
838 a message is delivered. (The old names remain recognized, of course.)
840 PH/44 There was no timeout on the connect() call when using a Unix domain
841 socket in the ${readsocket expansion. There now is.
843 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
844 be meaningful with "accept".
846 SC/01 Eximstats V1.43
847 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
849 SC/02 Eximstats V1.44
850 Use a glob alias rather than an array ref in the generated
851 parser. This improves both readability and performance.
853 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
854 Collect SpamAssassin and rejection statistics.
855 Don't display local sender or destination tables unless
856 there is data to show.
857 Added average volumes into the top table text output.
859 SC/04 Eximstats V1.46
860 Collect data on the number of addresses (recipients)
861 as well as the number of messages.
863 SC/05 Eximstats V1.47
864 Added 'Message too big' to the list of mail rejection
865 reasons (thanks to Marco Gaiarin).
867 SC/06 Eximstats V1.48
868 Mainlog lines which have GMT offsets and are too short to
869 have a flag are now skipped.
871 SC/07 Eximstats V1.49 (Alain Williams)
872 Added the -emptyok flag.
874 SC/08 Eximstats V1.50
875 Fixes for obtaining the IP address from reject messages.
877 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
878 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
879 whitesspace changes from 4.64-PH/27
881 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
884 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
885 are found, allow negative numbers in numeric criteria)
887 JJ/06 exipick.20061117.2, added new $message_body_missing variable
889 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
890 to match changes made in 4.64-PH/43
892 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
894 PH/47 Put in an explicit test for a DNS lookup of an address record where the
895 "domain" is actually an IP address, and force a failure. This locks out
896 those revolvers/nameservers that support "A-for-A" lookups, in
897 contravention of the specifications.
899 PH/48 When a host name was looked up from an IP address, and the subsequent
900 forward lookup of the name timed out, the host name was left in
901 $sender_host_name, contrary to the specification.
903 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
904 restricted to single-key lookups, Exim was not diagnosing an error if
905 * or *@ was used with a query-style lookup.
907 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
909 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
910 long ago, but noone interested enough thought of it. Let's just say that
911 the "1.1" means that there are some new functions that weren't there at
912 some point in the past.
914 PH/51 Error processing for expansion failure of helo_data from an smtp
915 transport during callout processing was broken.
917 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
918 tested/used via the -bh/-bhc/-bs options.
920 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
921 bug, fixed in subsequent PCRE releases).
923 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
924 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
926 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
932 SC/01 Use a glob alias rather than an array ref in eximstats generated
933 parser. This improves both readability and performance.
935 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
936 Don't display local sender or destination tables in eximstats unless
937 there is data to show.
938 Added average volumes into the eximstats top table text output.
940 SC/03 Collect data on the number of addresses (recipients) as well
941 as the number of messages in eximstats.
943 TF/01 Correct an error in the documentation for the redirect router. Exim
944 does (usually) call initgroups() when daemonizing.
946 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
947 with consistent privilege compared to when running as a daemon.
949 TF/03 Note in the spec that $authenticated_id is not set for local
950 submissions from trusted users.
952 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
953 Thanks to Dean Brooks <dean@iglou.com> for the patch.
955 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
956 by adding some example configuration directives to the default
957 configuration file. A little bit of work is required to uncomment the
958 directives and define how usernames and passwords are checked, but
959 there is now a framework to start from.
961 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
962 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
963 without this. I don't know how relevant this is to other LDAP libraries.
965 PH/02 Add the verb name to the "unknown ACL verb" error.
967 PH/03 Magnus Holmgren's patch for filter_prepend_home.
969 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
971 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
972 directory not expanded when it should be if an expanded home directory
973 was set for the address (which is overridden by the transport).
975 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
978 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
979 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
980 because it is too late at that time, and has no effect.
982 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
983 security issue with \' (bugzilla #107). I could not use the
984 PQescapeStringConn() function, because it needs a PGconn value as one of
987 PH/08 When testing addresses using -bt, indicate those final addresses that
988 are duplicates that would not cause an additional delivery. At least one
989 person was confused, thinking that -bt output corresponded to deliveries.
990 (Suppressing duplicates isn't a good idea as you lose the information
991 about possibly different redirections that led to the duplicates.)
993 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
994 systems where poll() doesn't work, in particular OS X.
996 PH/10 Added more information to debugging output for retry time not reached.
998 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
999 operations in malware.c.
1001 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1004 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1005 syslog_duplication set false, log lines that would normally be written
1006 both the the main log and to the reject log were not written to syslog at
1009 PH/14 In the default configuration, change the use of "message" in ACL warn
1010 statements to "add_header".
1012 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1013 not followed by a command (e.g. "seen endif").
1015 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1016 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1019 PH/17 Added extra conditions to the default value of delay_warning_condition
1023 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1024 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1025 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1028 The Auto-Submitted: and various List- headers are standardised, whereas I
1029 don't think Precedence: ever was.
1031 PH/18 Refactored debugging code in route_finduser() to show more information,
1032 in particular, the error code if getpwnam() issues one.
1034 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1035 This is apparently needed in addition to the PH/07 change above to avoid
1036 any possible encoding problems.
1038 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1039 but not after initializing Perl.
1041 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1042 output them only if debugging. By default they are written stderr,
1043 apparently, which is not desirable.
1045 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1048 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1051 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1053 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1054 authenticated or an ident call has been made. Suppress the default
1055 values for $authenticated_id and $authenticated_sender (but permit -oMai
1056 and -oMas) when testing with -bh.
1058 PH/24 Re-jigged the order of the tests in the default configuration so that the
1059 tests for valid domains and recipients precede the DNS black list and CSA
1060 tests, on the grounds that those ones are more expensive.
1062 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1063 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1064 This bug exists in every version of Exim that I still have, right back to
1067 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1068 However, an attempt to turn on case-sensitivity in a regex key by
1069 including (?-i) didn't work because the subject string was already
1070 lowercased, and the effects were non-intuitive. It turns out that a
1071 one-line patch can be used to allow (?-i) to work as expected.
1077 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1078 other effects) broke the use of negated acl sub-conditions.
1080 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1083 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1084 "Deny" causes Exim to reject the incoming connection with a 554 error.
1085 Unfortunately, if there is a major crisis, such as a disk failure,
1086 tcp-wrappers gives "deny", whereas what one would like would be some
1087 kind of temporary error. A kludge has been added to help with this.
1088 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1089 554 error is used if errno is still zero or contains ENOENT (which occurs
1090 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1093 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1095 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1096 errors. Otherwise a message that provokes a temporary error (when other
1097 messages do not) can cause a whole host to time out.
1099 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1100 addresses were routed directly to files or pipes from a redirect router.
1101 File deliveries just didn't batch; pipe deliveries might have suffered
1104 PH/06 A failure to get a lock for a hints database would erroneously always say
1105 "Failed to get write lock", even when it was really a read lock.
1107 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1108 of 0600. This has been changed to use the value of the lockfile_mode
1109 option (which defaults to 0600).
1111 PH/08 Applied small patch from the Sieve maintainer.
1113 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1114 folder from quota calculations, a direct delivery into this folder messed
1115 up the contents of the maildirsize file. This was because the regex was
1116 used only to exclude .Trash (or whatever) when the size of the mailbox
1117 was calculated. There was no check that a delivery was happening into an
1118 excluded directory. This bug has been fixed by ignoring all quota
1119 processing for deliveries into excluded directories.
1121 PH/10 Added the maildirfolder_create_regex option to appendfile.
1127 PH/01 The code for finding all the local interface addresses on a FreeBSD
1128 system running IPv6 was broken. This may well have applied to all BSD
1129 systems, as well as to others that have similar system calls. The broken
1130 code found IPv4 interfaces correctly, but gave incorrect values for the
1131 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1132 that it would not match correctly against @[] and not recognize the IPv6
1135 PH/02 The ipliteral router was not recognizing addresses of the form user@
1136 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1138 PH/03 Added disable_ipv6.
1140 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1141 decoded form, because it is most often used to construct To: headers
1142 lines in autoreplies, and the decoded form may well be syntactically
1143 invalid. However, $reply_address has leading white space removed, and all
1144 newlines turned into spaces so that the autoreply transport does not
1147 PH/05 If group was specified without a user on a router, and no group or user
1148 was specified on a transport, the group from the router was ignored.
1150 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1151 for visible compile-time settings that can be used to change these
1152 numbers, for those that want even more. Backwards compatibility with old
1153 spool files has been maintained. However, going back to a previous Exim
1154 release will lost any variables that are in spool files.
1156 PH/07 Two small changes when running in the test harness: increase delay when
1157 passing a TCP/IP connection to a new process, in case the original
1158 process has to generate a bounce, and remove special handling of
1159 127.0.0.2 (sic), which is no longer necessary.
1161 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1162 be the same on different OS.
1164 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1167 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1168 whether --show-vars was specified or not
1170 JJ/02 exipick: Added support for new ACL variable spool format introduced
1173 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1174 syntactically invalid From: or Reply-to: line, and a filter used this to
1175 generate an autoreply, and therefore failed to obtain an address for the
1176 autoreply, Exim could try to deliver to a non-existent relative file
1177 name, causing unrelated and misleading errors. What now happens is that
1178 it logs this as a hard delivery error, but does not attempt to create a
1181 PH/11 The exinext utility has a -C option for testing purposes, but although
1182 the given file was scanned by exinext itself; it wasn't being passed on
1183 when Exim was called.
1185 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1186 an end-of-file indication when reading a command response.
1188 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1189 compiled. In many other places in Exim, IPv6 addresses are always
1190 recognized, so I have changed this. It also means that IPv4 domain
1191 literals of the form [IPV4:n.n.n.n] are now always recognized.
1193 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1194 used if the router is not running as root, for example, when verifying at
1195 ACL time, or when using -bh. The debugging output from this situation was
1196 non-existent - all you got was a failure to exec. I have made two
1199 (a) Failures to set uid/gid, the current directory, or a process leader
1200 in a subprocess such as that created by queryprogram now generate
1201 suitable debugging ouput when -d is set.
1203 (b) The queryprogram router detects when it is not running as root,
1204 outputs suitable debugging information if -d is set, and then runs
1205 the subprocess without attempting to change uid/gid.
1207 PH/15 Minor change to Makefile for building test_host (undocumented testing
1210 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1211 additional section of a DNS packet that returns MX or SRV records.
1212 Instead, it always explicitly searches for A/AAAA records. This avoids
1213 major problems that occur when a DNS server includes only records of one
1214 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1215 fixed another bug: if SRV records were looked up and the corresponding
1216 address records were *not* found in the additional section, the port
1217 values from the SRV records were lost.
1219 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1220 using the correct key (the original address) when searching the retry
1221 rules in order to find which one to use for generating the retry hint.
1223 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1224 adding the default one. Similarly, if it contains a Reply-To: header, the
1225 errors_reply_to option, if set, is not used.
1227 PH/19 When calculating a retry time, Exim used to measure the "time since
1228 failure" by looking at the "first failed" field in the retry record. Now
1229 it does not use this if it is later than than the arrival time of the
1230 message. Instead it uses the arrival time. This makes for better
1231 behaviour in cases where some deliveries succeed, thus re-setting the
1232 "first failed" field. An example is a quota failure for a huge message
1233 when small messages continue to be delivered. Without this change, the
1234 "time since failure" will always be short, possible causing more frequent
1235 delivery attempts for the huge message than are intended.
1236 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1238 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1239 $1, $2, $3) because the numerical variables can be reset during some
1240 expansion items (e.g. "match"), thereby losing the authentication data.
1242 PH/21 Make -bV show the size of off_t variables so that the test suite can
1243 decide whether to run tests for quotas > 2G.
1245 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1246 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1247 filecount value is greater than 2G or if a quota value is greater than 2G
1248 on a system where the size of off_t is not greater than 4, a panic error
1251 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1252 never match. The debug and -bh output now contains an explicit error
1253 message indicating a malformed IPv4 address or mask.
1255 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1256 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1257 PH/23 above applies.
1259 PH/25 Do not write to syslog when running in the test harness. The only
1260 occasion when this arises is a failure to open the main or panic logs
1261 (for which there is an explicit test).
1263 PH/26 Added the /no_tell option to "control=freeze".
1265 PH/27 If a host name lookup failed very early in a connection, for example, if
1266 the IP address matched host_lookup and the reverse lookup yielded a name
1267 that did not have a forward lookup, an error message of the form "no IP
1268 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1269 could be logged. Now it outputs the IP address instead of "NULL".
1271 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1272 allows the sender and the authenticated sender to be set when
1273 submitting a message from within Exim. Since child_open_exim() is
1274 documented for local_scan(), the new function should be too.
1276 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1277 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1278 results in an empty string is now treated as unset.
1280 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1282 PH/31 Added sender_verify_fail logging option.
1284 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1285 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1286 tidied the source and removed it altogether.
1288 PH/33 When a queue run was abandoned because the load average was too high, a
1289 log line was always written; now it is written only if the queue_run log
1290 selector is set. In addition, the log line for abandonment now contains
1291 information about the queue run such as the pid. This is always present
1292 in "start" and "stop" lines but was omitted from the "abandon" line.
1294 PH/34 Omit spaces between a header name and the colon in the error message that
1295 is given when verify = headers_syntax fails (if there are lots of them,
1296 the message gets confusing).
1298 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1299 names, as there are now some PTR records that contain slashes. This check
1300 is only to protect against broken name servers that fall over on strange
1301 characters, so the fact that it applies to all lookups doesn't matter.
1303 PH/36 Now that the new test suite is complete, we can remove some of the
1304 special code in Exim that was needed for the old test suite. For example,
1305 sorting DNS records because real resolvers return them in an arbitrary
1306 order. The new test suite's fake resolver always returns records in the
1309 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1310 bounces) except when queue_only is set, to avoid logging races between
1311 the different processes.
1313 PH/38 Panic-die if .include specifies a non-absolute path.
1315 PH/39 A tweak to the "H" retry rule from its user.
1317 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1318 a label. They prevented compilation on older perls.
1320 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1321 a warning to be raised on newish perls.
1323 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1324 on queue. Changes to match documented behaviour of showing count of
1325 messages matching specified criteria.
1327 PH/40 Changed the default ident timeout from 30s to 5s.
1329 PH/41 Added support for the use of login_cap features, on those BSD systems
1330 that have them, for controlling the resources used by pipe deliveries.
1332 PH/42 The content-scanning code uses fopen() to create files in which to put
1333 message data. Previously it was not paying any attention to the mode of
1334 the files. Exim runs with umask(0) because the rest of the code creates
1335 files with open(), and sets the required mode explicitly. Thus, these
1336 files were ending up world-writeable. This was not a big issue, because,
1337 being within the spool directory, they were not world-accessible. I have
1338 created a function called modefopen, which takes an additional mode
1339 argument. It sets umask(777), creates the file, chmods it to the required
1340 mode, then resets the umask. All the relevant calls to fopen() in the
1341 content scanning code have been changed to use this function.
1343 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1344 to 24 hours. This avoids potential overflow problems when processing G
1345 and H retry rules. I suspect nobody ever tinkers with this value.
1347 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1349 PH/45 When the plaintext authenticator is running as a client, the server's
1350 challenges are checked to ensure they are valid base64 strings. By
1351 default, the authentication attempt is cancelled if an invalid string is
1352 received. Setting client_ignore_invalid_base64 true ignores these errors.
1353 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1354 they are received. Thus, the responses can be made to depend on the
1355 challenges. If an invalid string is ignored, an empty string is placed in
1358 PH/46 Messages that are created by the autoreply transport now contains a
1359 References: header, in accordance with RFCs 2822 and 3834.
1361 PH/47 Added authenticated_sender_force to the smtp transport.
1363 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1365 PH/49 Installed latest patch from the Sieve maintainer.
1367 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1368 was also set, the appendfile transport was unnecessarily scanning a
1369 directory of message files (e.g. for maildir delivery) to find the count
1370 of files (along with the size), even though it did not need this
1371 information. It now does the scan only if it needs to find either the
1372 size of the count of files.
1374 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1376 PH/52 Two bugs concerned with error handling when the smtp transport is
1379 (i) Exim was not creating retry information for temporary errors given
1380 for individual recipients after the DATA command when the smtp transport
1381 was used in LMTP mode. This meant that they could be retried too
1382 frequently, and not timed out correctly.
1384 (ii) Exim was setting the flag that allows error details to be returned
1385 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1386 recipients that were returned after the DATA command.
1388 PH/53 This is related to PH/52, but is more general: for any failing address,
1389 when detailed error information was permitted to be returned to the
1390 sender, but the error was temporary, then after the final timeout, only
1391 "retry timeout exceeded" was returned. Now it returns the full error as
1392 well as "retry timeout exceeded".
1394 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1395 do this, and (what is worse) MTAs that accept it.
1397 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1398 will now be deprecated.
1400 PH/56 New os.c-cygwin from the Cygwin maintainer.
1402 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1403 formats (previously only available in exim formats via -bpr, -bpru,
1404 and -bpra. Now also available in native and exiqgrep formats)
1406 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1407 with very large, slow to parse queues
1409 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1411 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1413 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1414 responses to authentication challenges, though it was showing the
1415 challenges; (ii) I've removed the CR characters from the debug output for
1418 PH/58 Allow for the insertion of a newline as well as a space when a string
1419 is turned into more than one encoded-word during RFC 2047 encoding. The
1420 Sieve code now uses this.
1422 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1423 data_4xx, lost_connection, tls_required.
1425 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1426 message was being sent as an SMTP response.
1428 PH/61 Add -l and -k options to exicyclog.
1430 PH/62 When verifying, if an address was redirected to one new address, so that
1431 verification continued, and the new address failed or deferred after
1432 having set something in $address_data, the value of $address_data was not
1433 passed back to the ACL. This was different to the case when no
1434 redirection occurred. The value is now passed back in both cases.
1436 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1437 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1438 use login_cap.h, so on its own it isn't the distinguishing feature. The
1439 new name refers directly to the setclassresources() function.
1441 PH/65 Added configuration files for NetBSD3.
1443 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1445 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1446 is preferred over IPv4.
1448 PH/68 The bounce_return_message and bounce_return_body options were not being
1449 honoured for bounces generated during the reception of non-SMTP messages.
1450 In particular, this applied to messages rejected by the ACL. This bug has
1451 been fixed. However, if bounce_return_message is true and bounce_return_
1452 body is false, the headers that are returned for a non-SMTP message
1453 include only those that have been read before the error was detected.
1454 (In the case of an ACL rejection, they have all been read.)
1456 PH/69 The HTML version of the specification is now built in a directory called
1457 spec_html instead of spec.html, because the latter looks like a path with
1458 a MIME-type, and this confuses some software.
1460 PH/70 Catch two compiler warnings in sieve.c.
1462 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1463 function verify_get_ident() calls ip_connect() to connect a socket, but
1464 if the "connect()" function timed out, ip_connect() used to close the
1465 socket. However, verify_get_ident() also closes the socket later, and in
1466 between Exim writes to the log, which may get opened at this point. When
1467 the socket was closed in ip_connect(), the log could get the same file
1468 descriptor number as the socket. This naturally causes chaos. The fix is
1469 not to close the socket in ip_connect(); the socket should be closed by
1470 the function that creates it. There was only one place in the code where
1471 this was missing, in the iplookup router, which I don't think anybody now
1472 uses, but I've fixed it anyway.
1474 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1475 well as to direct DNS lookups. Otherwise the handling of names in host
1476 lists is inconsistent and therefore confusing.
1482 PH/01 Two changes to the default runtime configuration:
1484 (1) Move the checks for relay_from_hosts and authenticated clients from
1485 after to before the (commented out) DNS black list checks.
1487 (2) Add control=submission to the relay_from_hosts and authenticated
1488 clients checks, on the grounds that messages accepted by these
1489 statements are most likely to be submissions.
1491 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1493 (1) Generate an error if the third argument for the ${prvs expansion is
1496 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1499 (3) Reset the variables that are obtained from the first argument of
1500 ${prvscheck and used in the second argument before leaving the code,
1501 because their memory is reclaimed, so using them afterwards may do
1504 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1505 one (it's much easier than Tom thought :-).
1507 (5) Because of (4), we can now allow for the use of $prvscheck_result
1508 inside the third argument.
1510 PH/03 For some reason, the default setting of PATH when running a command from
1511 a pipe transport was just "/usr/bin". I have changed it to
1514 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1515 anything to be listed in the output from -bV.
1517 PH/05 When a filter generated an autoreply, the entire To: header line was
1518 quoted in the delivery log line, like this:
1520 => >A.N.Other <ano@some.domain> <original@ddress> ...
1522 This has been changed so that it extracts the operative address. There
1523 may be more than one such address. If so, they are comma-separated, like
1526 => >ano@some.domain,ona@other.domain <original@ddress> ...
1528 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1529 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1530 not being looked up in the rDNS to get a host name, Exim was showing the
1531 IP address twice in Received: lines, even though the IP addresses were
1532 identical. For example:
1534 Received: from [1.2.3.4] (helo=[1.2.3.4])
1536 However, if the real host name was known, it was omitting the HELO data
1537 if it matched the actual IP address. This has been tidied up so that it
1538 doesn't show the same IP address twice.
1540 PH/07 When both +timestamp and +memory debugging was on, the value given by
1541 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1542 called by the debug printing, thereby overwriting the timestamp buffer.
1543 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1545 PH/08 When the original message was included in an autoreply transport, it
1546 always said "this is a copy of the message, including all the headers",
1547 even if body_only or headers_only was set. It now gives an appropriate
1550 PH/09 Applied a patch from the Sieve maintainer which:
1552 o fixes some comments
1553 o adds the (disabled) notify extension core
1554 o adds some debug output for the result of if/elsif tests
1555 o points to the current vacation draft in the documentation
1556 and documents the missing references header update
1560 o fixes a bug in processing the envelope test (when testing
1561 multiple envelope elements, the last element determinted the
1564 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1565 Electronic Mail") by including:
1567 Auto-submitted: auto-generated
1569 in the messages that it generates (bounce messages and others, such as
1570 warnings). In the case of bounce messages for non-SMTP mesages, there was
1571 also a typo: it was using "Auto_submitted" (underscore instead of
1572 hyphen). Since every message generated by Exim is necessarily in response
1573 to another message, thes have all been changed to:
1575 Auto-Submitted: auto-replied
1577 in accordance with these statements in the RFC:
1579 The auto-replied keyword:
1581 - SHOULD be used on messages sent in direct response to another
1582 message by an automatic process,
1584 - MUST NOT be used on manually-generated messages,
1586 - MAY be used on Delivery Status Notifications (DSNs) and Message
1587 Disposition Notifications (MDNs),
1589 - MUST NOT be used on messages generated by automatic or periodic
1590 processes, except for messages which are automatic responses to
1593 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1594 to the default Received: header definition.
1596 PH/12 Added log selector acl_warn_skipped (default on).
1598 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1599 variables because (a) they are in the wrong storage pool and (b) even if
1600 they were copied, it wouldn't work properly because of the caching.
1602 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1603 checking when decoding. Apparently there are clients that generate
1604 overlong encoded strings. Why am I not surprised?
1606 PH/15 If the first argument of "${if match_address" was not empty, but did not
1607 contain an "@" character, Exim crashed. Now it writes a panic log message
1608 and treats the condition as false.
1610 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1612 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1613 extension "envelope-auth". The code is finished and in agreement with
1614 other implementations, but there is no documentation so far and in fact,
1615 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1616 not changing the active code.
1618 Print executed "if" and "elsif" statements when debugging is used. This
1619 helps a great deal to understand what a filter does.
1621 Document more things not specified clearly in RFC3028. I had all this
1622 sorted out, when out of a sudden new issues came to my mind. Oops."
1624 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1627 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1628 canonical form (as documented). However, after a host name lookup from
1629 the IP address, check_host() was doing a simple string comparison with
1630 addresses acquired from the DNS when checking that the found name did
1631 have the original IP as one of its addresses. Since any found IPv6
1632 addresses are likely to be in abbreviated form, the comparison could
1633 fail. Luckily, there already exists a function for doing the comparison
1634 by converting both addresses to binary, so now that is used instead of
1635 the text comparison.
1637 PH/20 There was another similar case to PH/19, when a complete host name was
1638 given in a host list; looking up its IP address could give an abbreviated
1639 form, whereas the current host's name might or might not be abbreviated.
1640 The same fix has been applied.
1646 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1647 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1650 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1651 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1653 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1655 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1656 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1657 Also, for "Auto-Submitted", treat anything other than "no" as
1658 non-personal, in accordance with RFC 3834. (Previously it treated
1659 anything starting "auto-" as non-personal.)
1661 TF/01 The control=submission/name=... option had a problem with syntax
1662 errors if the name included a slash character. The /name= option
1663 now slurps the rest of the string, so it can include any characters
1664 but it must come last in the list of options (after /sender_retain
1667 PH/05 Some modifications to the interface to the fake nameserver for the new
1675 TK/01 Added the "success_on_redirect" address verification option. See
1676 NewStuff for rationale and an example.
1678 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1680 PH/02 Patch to exigrep to allow it to work on syslog lines.
1682 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1683 fread() to skip over the body file's header line, because in Cygwin the
1684 header line is locked and is inaccessible.
1686 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1687 co-exist for some time) to make it clear that it is the Exim ID that is
1688 referenced, not the Message-ID: header line.
1690 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1691 string_format() function, because snprintf() does not exist on all
1694 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1695 ${stat: expansion item.
1697 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1698 protocol synchronization error", to keep the pedants happy.
1700 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1701 well as for IRIX systems, when gcc is being used. See the host.c source
1704 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1706 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1709 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1710 transport and to the smtp transport in LMTP mode.
1712 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1714 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1715 run a filter in a subprocess. This could lead to confusion in subsequent
1716 lookups in the parent process. There should also be a search_tidyup() at
1717 the end of the subprocess.
1719 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1720 only if the host matched helo_try_verify_hosts, which caused the
1721 verification to occur when the EHLO/HELO command was issued. The ACL just
1722 tested the remembered result. Now, if a previous verification attempt has
1723 not happened, "verify = helo" does it there and then.
1725 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1727 TK/03 Fix log output including CR from clamd.
1729 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1730 exist provoked a memory error which could cause a segfault.
1732 PH/15 Installed PCRE 6.2
1734 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1736 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1737 of the problem. Specifically, suggested +O2 rather than +O1 for the
1740 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1742 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1743 record, the port was not correctly logged when the outgoing_port log
1744 selector was set (it logged the transort's default port).
1746 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1747 fallback_hosts, and "hosts" in the smtp transport.
1749 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1750 host errors such as "Connection refused".
1752 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1753 authentication with radiusclient 0.4.9:
1755 - Error returned from rc_read_config was caught wrongly
1756 - Username/password not passed on to radius server due to wrong length.
1758 The presumption is that some radiusclient API changes for 4.51/PH/17
1759 were not taken care of correctly. The code is still untested by me (my
1760 Linux distribution still has 0.3.2 of radiusclient), but it was
1761 contributed by a Radius user.
1763 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1764 expanding the "port" option of the smtp transport.
1766 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1767 while reading a MIME header. Thanks to Tom Hughes for a patch.
1769 PH/24 Include config.h inside local_scan.h so that configuration settings are
1772 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1773 that in an ACL for RCPT (for example), you can examine exactly what was
1776 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1777 commands, but it was not correctly comparing the address with the actual
1778 client host address. Thus, it would show the EHLO address in Received:
1779 header lines when this was not necessary.
1781 PH/27 Added the % operator to ${eval:}.
1783 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1784 it should be ignoring failures (because with -C, for example, it has lost
1785 privilege). It wasn't ignoring creation failures other than "already
1788 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1791 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1792 because an input line was too long, either on its own, or by virtue of
1793 too many continuations, the temporary file was not being removed, and the
1794 return code was incorrect.
1796 PH/31 Missing "BOOL" in function definition in filtertest.c.
1798 PH/32 Applied Sieve patches from the maintainer.
1800 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1802 PH/33 Added "verify = not_blind".
1804 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1805 Local/Makefile (with some defaults set). These are used in built scripts
1806 such as exicyclog, but they have never been used in the exim_install
1807 script (though there are many overriding facilities there). I have
1808 arranged that the exim_install script now takes note of these two
1811 PH/35 Installed configuration files for Dragonfly.
1813 PH/36 When a locally submitted message by a trusted user did not contain a
1814 From: header, and the sender address was obtained from -f or from an SMTP
1815 MAIL command, and the trusted user did not use -F to supply a sender
1816 name, $originator_name was incorrectly used when constructing a From:
1817 header. Furthermore, $originator_name was used for submission mode
1818 messages from external hosts without From: headers in a similar way,
1819 which is clearly wrong.
1821 PH/37 Added control=suppress_local_fixups.
1823 PH/38 When log_selector = +received_sender was set, and the addition of the
1824 sender made the log line's construction buffer exactly full, or one byte
1825 less than full, an overflow happened when the terminating "\n" was
1828 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1829 when the result of a list match is failure because a DNS lookup failed.
1831 PH/40 RM_COMMAND is now used in the building process.
1833 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1834 the "build-* directories that it finds.
1836 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1837 address in a domain literal was a prefix of an interface address.
1839 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1840 when verifying a sender address, unless rewrite_headers is false.
1842 PH/44 Wrote a long comment about why errors_to addresses are verified as
1843 recipients, not senders.
1845 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1846 the ratelimit ACL was added.
1848 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1850 PH/46 Added extra information about PostgreSQL errors to the error string.
1852 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1853 avoiding the need to install special zones in a real server. This is
1854 backwards compatible; if it can't find the fake resolver, it drops back.
1855 Thus, both old and new test suites can be run.
1857 TF/02 Added util/ratelimit.pl
1859 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1860 clock is set back in time.
1862 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1863 Candler <B.Candler@pobox.com>.
1865 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1866 OK for addresses that are the result of redirections.
1868 PH/48 A number of further additions for the benefit of the new test suite,
1869 including a fake gethostbyname() that interfaces to the fake DNS resolver
1872 TF/06 The fix for widen_domains has also been applied to qualify_single and
1873 search_parents which are the other dnslookup options that can cause
1876 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1879 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1881 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1882 service" if it encountered an MX record with an empty target hostname.
1883 The message is now "an MX or SRV record indicated no SMTP service".
1885 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1886 if the DNS of the sending site is misconfigured. This is quite a
1887 common situation. This change restores the behaviour of treating a
1888 helo verification defer as a failure.
1890 PH/51 If self=fail was set on a router, the bounce message did not include the
1891 actual error message.
1897 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1899 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1900 command itself ended in error, the underlying message about the transport
1901 filter timeout was being overwritten with the pipe command error. Now the
1902 underlying error message should be appended to the second error message.
1904 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1906 PH/02 Reduce the amount of output that "make" produces by default. Full output
1907 can still be requested.
1909 PH/03 The warning log line about a condition test deferring for a "warn" verb
1910 was being output only once per connection, rather than after each
1911 occurrence (because it was using the same function as for successful
1912 "warn" verbs). This seems wrong, so I have changed it.
1914 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1915 it should not have, which might have caused a crash in the right
1916 circumstances, but probably never did.
1918 PH/04 Installed a modified version of Tony Finch's patch to make submission
1919 mode fix the return path as well as the Sender: header line, and to
1920 add a /name= option so that you can make the user's friendly name appear
1923 TF/03 Added the control = fakedefer ACL modifier.
1925 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1926 Mark Lowes for thorough testing.
1928 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1930 TK/03 Merged latest SRS patch from Miles Wilton.
1932 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1933 with the definition in sysexits.h (which is #included earlier).
1934 Fortunately, Exim does not actually use EX_OK. The code used to try to
1935 preserve the sysexits.h value, by assumimg that macro definitions were
1936 scanned for macro replacements. I have been disabused of this notion,
1937 so now the code just undefines EX_OK before #including unistd.h.
1939 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1940 in the smtp transport. When a block could not be written in a single
1941 write() function, the timeout was being re-applied to each part-write.
1942 This seems wrong - if the receiver was accepting one byte at a time it
1943 would take for ever. The timeout is now adjusted when this happens. It
1944 doesn't have to be particularly precise.
1946 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1947 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1949 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1950 without a domain if the check to <postmaster@domain> fails.
1952 SC/01 Eximstats: added -xls and the ability to specify output files
1953 (patch written by Frank Heydlauf).
1955 SC/02 Eximstats: use FileHandles for outputing results.
1957 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1959 SC/04 Eximstats: fixed display of large numbers with -nvr option
1961 SC/05 Eximstats: fixed merging of reports with empty tables.
1963 SC/06 Eximstats: added the -include_original_destination flag
1965 SC/07 Eximstats: removed tabs and trailing whitespace.
1967 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1969 TK/06 MBOX spool code: Add real "From " MBOX separator line
1970 so the .eml file is really in mbox format (even though
1971 most programs do not really care). Patch from Alex Miller.
1973 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1974 The latter is generated from $received_to and is only set if the
1975 message has one envelope recipient. SA can use these headers,
1976 obviously out-of-the-box. Patch from Alex Miller.
1978 PH/08 The ${def test on a variable was returning false if the variable's
1979 value was "0", contrary to what the specification has always said!
1980 The result should be true unless the variable is empty.
1982 PH/09 The syntax error of a character other than { following "${if
1983 def:variable_name" (after optional whitespace) was not being diagnosed.
1984 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1985 accidental colon was present, for example, could give incorrect results.
1987 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1988 result is used (not including appendfile, where other changes are about
1991 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1992 This involved changing a lot of size variables from int to off_t. It
1993 should work with maildirs and everything.
1995 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1996 spamd dying while we are connected to it.
1998 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2001 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2002 function for BDB 4.3.
2004 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2006 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2007 the sources for PCRE have been re-arranged and more files are now
2010 PH/15 The code I had for printing potentially long long variables in PH/11
2011 above was not the best (it lost precision). The length of off_t variables
2012 is now inspected at build time, and an appropriate printing format (%ld
2013 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2014 to be "long long int" or "long int". This is needed for the internal
2015 formatting function string_vformat().
2017 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2018 the configuration file to be ":syslog", then the script "guesses" where
2019 the logs files are, rather than using the compiled in default. In our
2020 case the guess is not the same as the compiled default, so the script
2021 suddenly stopped working when I started to use syslog. The patch checks
2022 to see if log_file_path is "". If so, it attempts to read it from exim
2023 with no configuration file to get the compiled in version, before it
2024 falls back to the previous guessing code."
2026 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2027 implementing BATV in an Exim configuration. See NewStuff for the gory
2030 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2031 Makefile that are specific to HP-UX.
2033 PH/18 If the "use_postmaster" option was set for a recipient callout together
2034 with the "random" option, the postmaster address was used as the MAIL
2035 FROM address for the random test, but not for the subsequent recipient
2036 test. It is now used for both.
2038 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2039 patch removes a few documentation additions to RFC 3028, because the
2040 latest draft now contains them. It adds the new en;ascii-case comparator
2041 and a new error check for 8bit text in MIME parts. Comparator and
2042 require names are now matched exactly. I enabled the subaddress
2043 extension, but it is not well tested yet (read: it works for me)."
2045 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2046 rework some of the code of TK/09 above to avoid the hardwired use of
2047 "%lld" and "long long". Replaced the call to snprintf() with a call to
2050 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2051 records point to non-existent hosts", "retry timeout exceeded", and
2052 "retry time not reached for any host after a long failure period".
2054 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2055 experimental DomainKeys support:
2057 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2058 (2) On an error such as an illegally used "control", the wrong name for
2059 the control was given.
2061 These problems did NOT occur unless DomainKeys support was compiled.
2063 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2065 PH/24 Added ${if match_ip condition.
2067 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2068 databases so that it will be absolutely obvious if a crash occurs in the
2069 DB library. This is a regular occurrence (often caused by mis-matched
2072 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2073 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2074 picked up on a user's system that detects such things. There doesn't seem
2075 to be a gcc warning option for this - only an attribute that has to be
2076 put on the function's prototype. It seems that in Fedora Core 4 they have
2077 set this on a number of new functions. No doubt there will be more in due
2080 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2081 specify a transport. However, if an address that was verified by such a
2082 router was the subject of a callout, Exim crashed because it tried to
2083 read the rcpt_include_affixes from the non-existent transport. Now it
2084 just assumes that the setting of that option is false. This bug was
2085 introduced by 4.51/PH/31.
2087 PH/28 Changed -d+all to exclude +memory, because that information is very
2088 rarely of interest, but it makes the output a lot bigger. People tend to
2089 do -d+all out of habit.
2091 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2092 code in os-type was giving problems when libc.so lives in lib64, like on
2095 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2096 aren't the modern standard, and it seems that some systems' include files
2097 don't always have them. Exim was already checking for some of the newer
2098 ones like T_AAAA, and defining it itself. I've added checks for all the
2099 record types that Exim uses.
2101 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2102 not automatically generating a new one, as it is supposed to. This
2103 prevented TLS from working. If the file did exist, but contained invalid
2104 data, a new version was generated, as expected. It was only the case of a
2105 non-existent file that was broken.
2107 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2108 with a change in libdomainkeys > 0.64.
2110 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2111 from DNS. If the selector record carries the flag, it now has
2112 precedence over the domain-wide flag.
2114 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2116 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2117 the use of a port name that isn't defined in /etc/services) occurred, the
2118 message was deferred as in a normal delivery, and thus remained on the
2119 spool, instead of being failed because of the mua_wrapper setting. This
2120 is now fixed, and I tidied up some of the mua_wrapper messages at the
2123 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2124 the messages in a hash of arrays rather than using individual hashes.
2125 This is a bit cleaner and results in dramatic memory savings, albeit
2126 at a slight CPU cost.
2128 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2129 as requested by Marc Sherman.
2131 SC/10 Eximstats: added histograms for user specified patterns as requested
2134 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2136 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2137 fopen() in the content-scanning modules that did not already have it.
2143 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2144 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2146 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2148 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2150 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2151 to test Sieve filters that use "vacation".
2153 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2154 that changes the way the GnuTLS parameters are stored in the cache file.
2155 The new format can be generated externally. For backward compatibility,
2156 if the data in the cache doesn't make sense, Exim assumes it has read an
2157 old-format file, and it generates new data and writes a new file. This
2158 means that you can't go back to an older release without removing the
2161 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2162 work if there are any delivery delays because "one_time" forces the
2163 parent to be marked "delivered", so its unseen clone is never tried
2164 again. For this reason, Exim now forbids the simultaneous setting of
2167 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2168 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2169 entry if you want to know the details. The fix, however, neglected to
2170 consider the case when local delivery batching is involved. The test for
2171 "previously delivered" was not happening when checking to see if an
2172 address could be batched with a previous (undelivered) one; under
2173 certain circumstances this could lead to multiple deliveries to the same
2176 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2177 in its include files, and this causes problems building Exim.
2179 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2180 header_syntax) but Exim was just ignoring anything given after a slash.
2181 In particular, this caused confusion with an attempt to use "verify =
2182 reverse_host_lookup/defer_ok". An error is now given when options are
2183 supplied for verify items that do not have them. (Maybe reverse_host_
2184 lookup should have a defer_ok option, but that's a different point.)
2186 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2187 defined by RFC 821) to 2048, because there were problems with some AUTH
2188 commands, and RFC 1869 says the size should be increased for extended
2189 SMTP commands that take arguments.
2191 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2194 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2195 "unknown" error; now it says that the functionality isn't in the binary.
2197 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2198 an address' error message when a string expansion fails (syntax or
2199 whatever). Otherwise the password may appear in the log. Following change
2200 PH/42 below, there is no longer a chance of it appearing in a bounce
2203 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2205 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2206 of its addresses was ever tried. (Bugzilla bug #2.)
2208 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2209 the result incorrectly in the debug output. (It correctly added a newline
2210 to what was transported.)
2212 TF/01 Added $received_time.
2214 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2215 commented out examples of how to interface to a virus scanner and to
2216 SpamAssassin. Also added commented examples of av_scanner and
2217 spamd_address settings.
2219 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2220 and controls are allowed in which ACLs. There were a couple of minor
2221 errors. Some of the entries in the conditions table (which is a table of
2222 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2223 negation of where the condition IS allowed.
2225 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2227 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2228 header file does not have a version number, so I've had to invent a new
2229 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2230 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2231 radiusclient), but it was contributed by a Radius user.
2233 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2234 files or directories, for OpenSSL.
2236 PH/19 When an Exim process that is running as root has to create an Exim log
2237 file, it does so in a subprocess that runs as exim:exim so as to get the
2238 ownership right at creation (otherwise, other Exim processes might see
2239 the file with the wrong ownership). There was no test for failure of this
2240 fork() call, which would lead to the process getting stuck as it waited
2241 for a non-existent subprocess. Forks do occasionally fail when resources
2242 run out. I reviewed all the other calls to fork(); they all seem to check
2245 PH/20 When checking for unexpected SMTP input at connect time (before writing
2246 the banner), Exim was not dealing correctly with a non-positive return
2247 from the read() function. If the client had disconnected by this time,
2248 the result was a log entry for a synchronization error with an empty
2249 string after "input=" when read() returned zero. If read() returned -1
2250 (an event I could not check), uninitialized data bytes were printed.
2251 There were reports of junk text (parts of files, etc) appearing after
2254 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2256 PH/22 Added support for macro redefinition, and (re)definition in between
2257 driver and ACL definitions.
2259 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2260 forgetting to use the resulting value; it was using the unexpanded value.
2262 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2263 hadn't been configured. The fix is from Juergen Kreileder, who
2264 understands it better than I do:
2266 "Here's what I see happening with three configured cyrus_sasl
2267 authenticators configured (plain, login, cram-md5):
2269 On startup auth_cyrus_sasl_init() gets called for each of these.
2270 This means three calls to sasl_listmech() without a specified mech_list.
2271 => SASL tests which mechs of all available mechs actually work
2272 => three warnings about OTP not working
2273 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2275 With the patch, sasl_listmech() also gets called three times. But now
2276 SASL's mech_list option is set to the server_mech specified in the the
2277 authenticator. Or in other words, the answer from sasl_listmech()
2278 gets limited to just the mech you're testing for (which is different
2280 => the return list contains just 'plain' or 'login', 'cram-md5' or
2281 nothing depending on the value of ob->server_mech.
2283 I've just tested the patch: Authentication still works fine,
2284 unavailable mechs specified in the exim configuration are still
2285 caught, and the auth.log warnings about OTP are gone."
2287 PH/25 When debugging is enabled, the contents of the command line are added
2288 to the debugging output, even when log_selector=+arguments is not
2291 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2292 answer is "GNU", and only if the return is "GNU/something" is the answer
2295 PH/27 $acl_verify_message is now set immediately after the failure of a
2296 verification in an ACL, and so is available in subsequent modifiers. In
2297 particular, the message can be preserved by coding like this:
2299 warn !verify = sender
2300 set acl_m0 = $acl_verify_message
2302 Previously, $acl_verify_message was set only while expanding "message"
2303 and "log_message" when a very denied access.
2305 PH/28 Modified OS/os.c-Linux with
2307 -#ifndef OS_LOAD_AVERAGE
2308 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2310 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2311 nomenclature these days.)
2313 PH/29 Installed patch from the Sieve maintainer that adds the options
2314 sieve_useraddress and sieve_subaddress to the redirect router.
2316 PH/30 In these circumstances:
2317 . Two addresses routed to the same list of hosts;
2318 . First host does not offer TLS;
2319 . First host accepts first address;
2320 . First host gives temporary error to second address;
2321 . Second host offers TLS and a TLS session is established;
2322 . Second host accepts second address.
2323 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2324 and peerdn, if requested) that were in fact used only for the second
2327 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2328 attention to any local part prefix or suffix that was matched by the
2329 router that accepted the address. It now behaves in the same way as it
2330 does for delivery: the affixes are removed from the local part unless
2331 rcpt_include_affixes is set on the transport.
2333 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2334 timeout during the DATA phase of an incoming message.
2336 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2337 applied a patch sanctioned by the Sieve maintainer.
2339 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2340 the uid or gid is negative. A case of a negative gid caused this to be
2341 noticed. The fix allows for either to be negative.
2343 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2344 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2347 PH/36 The change PH/12 above was broken. Fixed it.
2349 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2350 the grounds that routing the same address twice would always produce the
2351 same answer. This might have been true once, but it is certainly no
2352 longer true now. Routing a child address may depend on the previous
2353 routing that produced that child. Some complicated redirection strategies
2354 went wrong when messages had multiple recipients, and made Exim's
2355 behaviour dependent on the order in which the addresses were given.
2357 I have moved the duplicate checking until after the routing is complete.
2358 Exim scans the addresses that are assigned to local and remote
2359 transports, and removes any duplicates. This means that more work will be
2360 done, as duplicates will always all be routed, but duplicates are
2361 presumably rare, so I don't expect this is of any significance.
2363 For deliveries to pipes, files, and autoreplies, the duplicate checking
2364 still happens during the routing process, since they are not going to be
2367 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2368 It corrects a timeout issue with spamd. This is Ian's comment: "The
2369 background is that sometimes spamd either never reads data from a
2370 connection it has accepted, or it never writes response data. The exiscan
2371 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2372 blindly assumes that writes won't block so it may never time out."
2374 PH/39 Allow G after quota size as well as K and M.
2376 PH/40 The value set for $authenticated_id in an authenticator may not contain
2377 binary zeroes or newlines because the value is written to log lines and
2378 to spool files. There was no check on this. Now the value is run through
2379 the string_printing() function so that such characters are converted to
2380 printable escape sequences.
2382 PH/41 $message_linecount is a new variable that contains the total number of
2383 lines in the message. Compare $body_linecount, which is the count for the
2386 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2387 bounce and delay warning messages, except in certain special cases, which
2390 (a) An SMTP error message from a remote host;
2391 (b) A message specified in a :fail: redirection;
2392 (c) A message specified in a "fail" command in a system filter;
2393 (d) A message specified in a FAIL return from the queryprogram router;
2394 (e) A message specified by the cannot_route_message router option.
2396 In these cases only, Exim does include the error details in bounce and
2397 warning messages. There are also a few cases where bland messages such
2398 as "unrouteable address" or "local delivery error" are given.
2400 PH/43 $value is now also set for the "else" part of a ${run expansion.
2402 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2403 being worked on, but at least Exim now implements the latest version to
2406 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2407 process to complete was treated as a delivery failure, a timeout while
2408 writing the message to the pipe was logged, but erroneously treated as a
2409 successful delivery. Such timeouts include transport filter timeouts. For
2410 consistency with the overall process timeout, these timeouts are now
2411 treated as errors, giving rise to delivery failures by default. However,
2412 there is now a new Boolean option for the pipe transport called
2413 timeout_defer, which, if set TRUE, converts the failures into defers for
2414 both kinds of timeout. A transport filter timeout is now identified in
2417 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2418 systems where "make" and "gmake" are different, calling "gmake" at top
2419 level broke things. I've arranged for the value of $(MAKE) to be passed
2420 from the Makefile to this script so that it can call the same version of
2424 A note about Exim versions 4.44 and 4.50
2425 ----------------------------------------
2427 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2428 changes of various kinds. As a consequence, a big documentation update was
2429 needed. This delayed the release for rather longer than seemed good, especially
2430 in the light of a couple of (minor) security issues. Therefore, the changes
2431 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2432 release. So 4.44 and 4.50 are in effect two different branches that both start
2435 I have left the 4.50 change log unchanged; it contains all the changes since
2436 4.43. The change log for 4.44 is below; many of its items are identical to
2437 those for 4.50. This seems to be the most sensible way to preserve the
2438 historical information.
2444 1. Minor wording change to the doc/README.SIEVE file.
2446 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2447 computation of the current number of files was incorrect.
2449 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2450 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2453 4. Give more explanation in the error message when the command for a transport
2454 filter fails to execute.
2456 5. There are several places where Exim runs a non-Exim command in a
2457 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2458 was being done only for the command run by the queryprogram router. It is
2459 now done for all such subprocesses. The other cases are: ${run, transport
2460 filters, and the commands run by the lmtp and pipe transports.
2462 6. Added CONFIGURE_GROUP build-time option.
2464 7. Some older OS have a limit of 256 on the maximum number of file
2465 descriptors. Exim was using setrlimit() to set 1000 as a large value
2466 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2467 systems. I've change it so that if it can't get 1000, it tries for 256.
2469 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2470 was an oversight, and furthermore, ever since the addition of extra
2471 controls (e.g. 4.43/32), the checks on when to allow different forms of
2472 "control" were broken. There should now be diagnostics for all cases when a
2473 control that does not make sense is encountered.
2475 9. Added the /retain_sender option to "control=submission".
2477 10. $recipients is now available in the predata ACL (oversight).
2479 11. Tidy the search cache before the fork to do a delivery from a message
2480 received from the command line. Otherwise the child will trigger a lookup
2481 failure and thereby defer the delivery if it tries to use (for example) a
2482 cached ldap connection that the parent has called unbind on.
2484 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2485 of $address_data from the recipient verification was clobbered by the
2486 sender verification.
2488 13. The value of address_data from a sender verification is now available in
2489 $sender_address_data in subsequent conditions in the ACL statement.
2491 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2493 15. Added a new option "connect=<time>" to callout options, to set a different
2496 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2497 was its contents. (It was OK if the option was not defined at all.)
2499 17. A "Completed" log line is now written for messages that are removed from
2500 the spool by the -Mrm option.
2502 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2503 information about exactly what failed.
2505 19. Added -dd to debug only the daemon process.
2507 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2508 handles timeouts, both on the server side and network timeouts. Renamed the
2509 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2511 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2512 It is now set to "smtps".
2514 22. $host_address is now set to the target address during the checking of
2515 ignore_target_hosts.
2517 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2518 being passed; this would have caused $sender_host_name to have been used if
2519 matching the list had actually called for a host name (not very likely,
2520 since this list is usually IP addresses). A host name is now passed as
2523 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2524 code that specifies a non-restarting handler (typically sigaction() in
2525 modern systems) in an attempt to fix a rare and obscure crash bug.
2527 25. Narrowed the window for a race in the daemon that could cause it to ignore
2528 SIGCHLD signals. This is not a major problem, because they are used only to
2529 wake it up if nothing else does.
2531 26. A malformed maildirsize file could cause Exim to calculate negative values
2532 for the mailbox size or file count. Odd effects could occur as a result.
2533 The maildirsize information is now recalculated if the size or filecount
2536 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2537 support for a long time. Removed HAVE_SYS_VFS_H.
2539 28. Installed the latest version of exipick from John Jetmore.
2541 29. In an address list, if the pattern was not a regular expression, an empty
2542 subject address (from a bounce message) matched only if the pattern was an
2543 empty string. Non-empty patterns were not even tested. This was the wrong
2544 because it is perfectly reasonable to use an empty address as part of a
2545 database query. An empty address is now tested by patterns that are
2546 lookups. However, all the other forms of pattern expect the subject to
2547 contain a local part and a domain, and therefore, for them, an empty
2548 address still always fails if the pattern is not itself empty.
2550 30. Exim went into a mad DNS loop when attempting to do a callout where the
2551 host was specified on an smtp transport, and looking it up yielded more
2552 than one IP address.
2554 31. Re-factored the code for checking spool and log partition space into a
2555 function that finds that data and another that does the check. The former
2556 is then used to implement four new variables: $spool_space, $log_space,
2557 $spool_inodes, and $log_inodes.
2559 32. The RFC2047 encoding function was originally intended for short strings
2560 such as real names; it was not keeping to the 75-character limit for
2561 encoded words that the RFC imposes. It now respects the limit, and
2562 generates multiple encoded words if necessary. To be on the safe side, I
2563 have increased the buffer size for the ${rfc2047: expansion operator from
2566 33. It is now permitted to omit both strings after an "if" condition; if the
2567 condition is true, the result is "true". As before, when the second string
2568 is omitted, a false condition yields an empty string. This makes it less
2569 cumbersome to write custom ACL and router conditions.
2571 34. Failure to deliver a bounce message always caused it to be frozen, even if
2572 there was an errors_to setting on the router. The errors_to setting is now
2575 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2576 canonical form (fully expanded) before being placed in
2577 $sender_host_address.
2579 36. The table in the code that translates DNS record types into text (T_A to
2580 "A" for instance) was missing entries for NS and CNAME. It is just possible
2581 that this could have caused confusion if both these types were looked up
2582 for the same domain, because the text type is used as part of Exim's
2583 per-process caching. But the chance of anyone hitting this buglet seems
2586 37. The dnsdb lookup has been extended in a number of ways.
2588 (1) There is a new type, "zns", which walks up the domain tree until it
2589 finds some nameserver records. It should be used with care.
2591 (2) There is a new type, "mxh", which is like "mx" except that it returns
2592 just the host names, not the priorities.
2594 (3) It is now possible to give a list of domains (or IP addresses) to be
2595 looked up. The behaviour when one of the lookups defers can be
2596 controlled by a keyword.
2598 (4) It is now possible to specify the separator character for use when
2599 multiple records are returned.
2601 38. The dnslists ACL condition has been extended: it is now possible to supply
2602 a list of IP addresses and/or domains to be looked up in a particular DNS
2605 39. Added log_selector=+queue_time_overall.
2607 40. When running the queue in the test harness, wait just a tad after forking a
2608 delivery process, to get repeatability of debugging output.
2610 41. Include certificate and key file names in error message when GnuTLS fails
2611 to set them up, because the GnuTLS error message doesn't include the name
2612 of the failing file when there is a problem reading it.
2614 42. Allow both -bf and -bF in the same test run.
2616 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2618 44. The "Exiscan patch" is now merged into the mainline Exim source.
2620 45. Sometimes the final signoff response after QUIT could fail to get
2621 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2622 < 0 before doing a fflush(). This bug looks as though it goes back to the
2623 introduction of TLS in release 3.20, but "sometimes" must have been rare
2624 because the tests only now provoked it.
2626 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2627 (this can affect the format of dates).
2629 47. exim_tidydb, when checking for the continued existence of a message for
2630 which it has found a message-specific retry record, was not finding
2631 messages that were in split spool directories. Consequently, it was
2632 deleting retry records that should have stayed in existence.
2634 48. Steve fixed some bugs in eximstats.
2636 49. The SPA authentication driver was not abandoning authentication and moving
2637 on to the next authenticator when an expansion was forced to fail,
2638 contradicting the general specification for all authenticators. Instead it
2639 was generating a temporary error. It now behaves as specified.
2641 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2642 (the order specifies the preference for clients). The order is now AES256,
2643 AES128, 3DES, ARCFOUR128.
2645 51. Small patch to Sieve code - explicitly set From: when generating an
2648 52. Exim crashed if a remote delivery caused a very long error message to be
2649 recorded - for instance if somebody sent an entire SpamAssassin report back
2650 as a large number of 550 error lines. This bug was coincidentally fixed by
2651 increasing the size of one of Exim's internal buffers (big_buffer) that
2652 happened as part of the Exiscan merge. However, to be on the safe side, I
2653 have made the code more robust (and fixed the comments that describe what
2656 53. Now that there can be additional text after "Completed" in log lines (if
2657 the queue_time_overall log selector is set), a one-byte patch to exigrep
2658 was needed to allow it to recognize "Completed" as not the last thing in
2661 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2662 patch that reportedly fixes this has been added. I am not expert enough to
2663 create a test for it. This is what the patch creator wrote:
2665 "I found a little strange behaviour of ldap code when working with
2666 Windows 2003 AD Domain, where users was placed in more than one
2667 Organization Units. When I tried to give exim partial DN, the exit code
2668 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2669 But simultaneously result of request was absolutely normal ldap result,
2670 so I produce this patch..."
2672 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2673 REFERENCE, so I have modified the code to exclude the patch when that macro
2676 55. Some experimental protocols are using DNS PTR records for new purposes. The
2677 keys for these records are domain names, not reversed IP addresses. The
2678 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2679 leaves it alone. Component reversal etc. now happens only for IP addresses.
2682 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2684 57. Double the size of the debug message buffer (to 2048) so that more of very
2685 long debug lines gets shown.
2687 58. The exicyclog utility now does better if the number of log files to keep
2688 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2690 59. Two changes related to the smtp_active_hostname option:
2692 (1) $smtp_active_hostname is now available as a variable.
2693 (2) The default for smtp_banner uses $smtp_active_hostname instead
2694 of $primary_hostname.
2696 60. The host_aton() function is supposed to be passed a string that is known
2697 to be a valid IP address. However, in the case of IPv6 addresses, it was
2698 not checking this. This is a hostage to fortune. Exim now panics and dies
2699 if the condition is not met. A case was found where this could be provoked
2700 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2701 components; fortuitously, this particular loophole had already been fixed
2702 by change 4.50/55 above.
2704 If there are any other similar loopholes, the new check in host_aton()
2705 itself should stop them being exploited. The report I received stated that
2706 data on the command line could provoke the exploit when Exim was running as
2707 exim, but did not say which command line option was involved. All I could
2708 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2709 running as the user.
2712 61. There was a buffer overflow vulnerability in the SPA authentication code
2713 (which came originally from the Samba project). I have added a test to the
2714 spa_base64_to_bits() function which I hope fixes it.
2717 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2718 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2720 63. The daemon start-up calls getloadavg() while still root for those OS that
2721 need the first call to be done as root, but it missed one case: when
2722 deliver_queue_load_max is set with deliver_drop_privilege. This is
2723 necessary for the benefit of the queue runner, because there is no re-exec
2724 when deliver_drop_privilege is set.
2726 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2727 This has been fixed.
2729 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2730 was in use, was not putting the data itself into the right store pool;
2731 consequently, it could be overwritten for a subsequent message in the same
2732 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2735 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2737 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2738 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2739 the function were treating the return as a boolean value, which happened to
2740 work because 0=false and not-0=true, but is not correct code.
2742 68. The host_aton() function was not handling scoped IPv6 addresses (those
2743 with, for example, "%eth0" on the end) correctly.
2745 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2746 negated items (that is, ~something) in unsigned ints. Some compilers
2747 apparently mutter when there is no cast.
2749 70. If an address verification called from an ACL failed, and did not produce a
2750 user-specific message (i.e. there was only a "system" message), nothing was
2751 put in $acl_verify_message. In this situation, it now puts the system
2754 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2755 session; change 4.31/43 added the unwanted input to the log line - except
2756 that it did not do this in the start of session case. It now does.
2758 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2759 This is wrong and can cause the other end to generate a synchronization
2760 error if it is another Exim or anything else that does the synchronization
2761 check. A QUIT command is no longer sent after a timeout.
2763 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2764 during host lookups.
2766 74. The defer_ok option of callout verification was not working if it was used
2767 when verifying addresses in header lines, that is, for this case:
2769 verify = header_sender/callout=defer_ok
2771 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2772 those file descriptors could be used for SMTP connections. If anything
2773 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2774 could be sent to the SMTP client, causing chaos. The daemon now opens
2775 stdin, stdout, and stderr to /dev/null when it puts itself into the
2778 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2779 log by default. The user can override this with suitable Perl magic.
2781 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2782 the log message when discard triggers, was not working for the DATA ACL or
2783 for the non-SMTP ACL.
2785 78. Error message wording change in sieve.c.
2787 79. If smtp_accept_max_per_host was set, the number of connections could be
2788 restricted to fewer than expected, because the daemon was trying to set up
2789 a new connection before checking whether the processes handling previous
2790 connections had finished. The check for completed processes is now done
2791 earlier. On busy systems, this bug wouldn't be noticed because something
2792 else would have woken the daemon, and it would have reaped the completed
2795 80. If a message was submitted locally by a user whose login name contained one
2796 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2797 It caused a spool format error. I have fixed the spool reading code. A
2798 related problem was that the "from" clause in the Received: line became
2799 illegal because of the space(s). It is now covered by ${quote_local_part.
2801 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2804 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2806 83. Patch from Sieve maintainer to fix unterminated string problem in
2807 "vacation" handling.
2809 84. Some minor changes to the Linux configuration files to help with other
2810 OS variants using glibc.
2812 85. One more patch for Sieve to update vacation handling to latest spec.
2815 ----------------------------------------------------
2816 See the note above about the 4.44 and 4.50 releases.
2817 ----------------------------------------------------
2823 1. Change 4.43/35 introduced a bug that caused file counts to be
2824 incorrectly computed when quota_filecount was set in an appendfile
2827 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2828 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2831 3. Give more explanation in the error message when the command for a transport
2832 filter fails to execute.
2834 4. There are several places where Exim runs a non-Exim command in a
2835 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2836 was being done only for the command run by the queryprogram router. It is
2837 now done for all such subprocesses. The other cases are: ${run, transport
2838 filters, and the commands run by the lmtp and pipe transports.
2840 5. Some older OS have a limit of 256 on the maximum number of file
2841 descriptors. Exim was using setrlimit() to set 1000 as a large value
2842 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2843 systems. I've change it so that if it can't get 1000, it tries for 256.
2845 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2846 was an oversight, and furthermore, ever since the addition of extra
2847 controls (e.g. 4.43/32), the checks on when to allow different forms of
2848 "control" were broken. There should now be diagnostics for all cases when a
2849 control that does not make sense is encountered.
2851 7. $recipients is now available in the predata ACL (oversight).
2853 8. Tidy the search cache before the fork to do a delivery from a message
2854 received from the command line. Otherwise the child will trigger a lookup
2855 failure and thereby defer the delivery if it tries to use (for example) a
2856 cached ldap connection that the parent has called unbind on.
2858 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2859 of $address_data from the recipient verification was clobbered by the
2860 sender verification.
2862 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2863 was its contents. (It was OK if the option was not defined at all.)
2865 11. A "Completed" log line is now written for messages that are removed from
2866 the spool by the -Mrm option.
2868 12. $host_address is now set to the target address during the checking of
2869 ignore_target_hosts.
2871 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2872 being passed; this would have caused $sender_host_name to have been used if
2873 matching the list had actually called for a host name (not very likely,
2874 since this list is usually IP addresses). A host name is now passed as
2877 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2878 code that specifies a non-restarting handler (typically sigaction() in
2879 modern systems) in an attempt to fix a rare and obscure crash bug.
2881 15. Narrowed the window for a race in the daemon that could cause it to ignore
2882 SIGCHLD signals. This is not a major problem, because they are used only to
2883 wake it up if nothing else does.
2885 16. A malformed maildirsize file could cause Exim to calculate negative values
2886 for the mailbox size or file count. Odd effects could occur as a result.
2887 The maildirsize information is now recalculated if the size or filecount
2890 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2891 support for a long time. Removed HAVE_SYS_VFS_H.
2893 18. Updated exipick to current release from John Jetmore.
2895 19. Allow an empty sender to be matched against a lookup in an address list.
2896 Previously the only cases considered were a regular expression, or an
2899 20. Exim went into a mad DNS lookup loop when doing a callout where the
2900 host was specified on the transport, if the DNS lookup yielded more than
2903 21. The RFC2047 encoding function was originally intended for short strings
2904 such as real names; it was not keeping to the 75-character limit for
2905 encoded words that the RFC imposes. It now respects the limit, and
2906 generates multiple encoded words if necessary. To be on the safe side, I
2907 have increased the buffer size for the ${rfc2047: expansion operator from
2910 22. Failure to deliver a bounce message always caused it to be frozen, even if
2911 there was an errors_to setting on the router. The errors_to setting is now
2914 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2915 canonical form (fully expanded) before being placed in
2916 $sender_host_address.
2918 24. Updated eximstats to version 1.33
2920 25. Include certificate and key file names in error message when GnuTLS fails
2921 to set them up, because the GnuTLS error message doesn't include the name
2922 of the failing file when there is a problem reading it.
2924 26. Expand error message when OpenSSL has problems setting up cert/key files.
2927 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2928 (this can affect the format of dates).
2930 28. exim_tidydb, when checking for the continued existence of a message for
2931 which it has found a message-specific retry record, was not finding
2932 messages that were in split spool directories. Consequently, it was
2933 deleting retry records that should have stayed in existence.
2935 29. eximstats updated to version 1.35
2936 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2937 1.35 - bugfix such that pie charts by volume are generated correctly
2939 30. The SPA authentication driver was not abandoning authentication and moving
2940 on to the next authenticator when an expansion was forced to fail,
2941 contradicting the general specification for all authenticators. Instead it
2942 was generating a temporary error. It now behaves as specified.
2944 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2945 (the order specifies the preference for clients). The order is now AES256,
2946 AES128, 3DES, ARCFOUR128.
2948 31. Small patch to Sieve code - explicitly set From: when generating an
2951 32. Exim crashed if a remote delivery caused a very long error message to be
2952 recorded - for instance if somebody sent an entire SpamAssassin report back
2953 as a large number of 550 error lines. This bug was coincidentally fixed by
2954 increasing the size of one of Exim's internal buffers (big_buffer) that
2955 happened as part of the Exiscan merge. However, to be on the safe side, I
2956 have made the code more robust (and fixed the comments that describe what
2959 33. Some experimental protocols are using DNS PTR records for new purposes. The
2960 keys for these records are domain names, not reversed IP addresses. The
2961 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2962 leaves it alone. Component reversal etc. now happens only for IP addresses.
2965 34. The host_aton() function is supposed to be passed a string that is known
2966 to be a valid IP address. However, in the case of IPv6 addresses, it was
2967 not checking this. This is a hostage to fortune. Exim now panics and dies
2968 if the condition is not met. A case was found where this could be provoked
2969 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2970 components; fortuitously, this particular loophole had already been fixed
2971 by change 4.50/55 or 4.44/33 above.
2973 If there are any other similar loopholes, the new check in host_aton()
2974 itself should stop them being exploited. The report I received stated that
2975 data on the command line could provoke the exploit when Exim was running as
2976 exim, but did not say which command line option was involved. All I could
2977 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2978 running as the user.
2981 35. There was a buffer overflow vulnerability in the SPA authentication code
2982 (which came originally from the Samba project). I have added a test to the
2983 spa_base64_to_bits() function which I hope fixes it.
2986 36. The daemon start-up calls getloadavg() while still root for those OS that
2987 need the first call to be done as root, but it missed one case: when
2988 deliver_queue_load_max is set with deliver_drop_privilege. This is
2989 necessary for the benefit of the queue runner, because there is no re-exec
2990 when deliver_drop_privilege is set.
2992 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2993 was in use, was not putting the data itself into the right store pool;
2994 consequently, it could be overwritten for a subsequent message in the same
2995 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2998 38. Sometimes the final signoff response after QUIT could fail to get
2999 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3000 < 0 before doing a fflush(). This bug looks as though it goes back to the
3001 introduction of TLS in release 3.20, but "sometimes" must have been rare
3002 because the tests only now provoked it.
3008 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3009 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3010 Now it returns an integer. A number of calls were still expecting a T/F
3011 return. Fortuitously, in all cases, the tests worked in OK situations,
3012 which is the norm. However, things would have gone wrong on any write
3013 failures on the smtp file descriptor. This function is used when sending
3014 messages over SMTP and also when doing verify callouts.
3016 2. When Exim is called to do synchronous delivery of a locally submitted
3017 message (the -odf or -odi options), it no longer closes stderr before doing
3020 3. Implemented the mua_wrapper option.
3022 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3024 5. Implemented the functions header_remove(), header_testname(),
3025 header_add_at_position(), and receive_remove_recipient(), and exported them
3028 6. If an ACL "warn" statement specified the addition of headers, Exim already
3029 inserted X-ACL-Warn: at the start if there was no header name. However, it
3030 was not making this test for the second and subsequent header lines if
3031 there were newlines in the string. This meant that an invalid header could
3032 be inserted if Exim was badly configured.
3034 7. Allow an ACL "warn" statement to add header lines at the start or after all
3035 the Received: headers, as well as at the end.
3037 8. Added the rcpt_4xx retry error code.
3039 9. Added postmaster_mailfrom=xxx to callout verification option.
3041 10. Added mailfrom=xxxx to the callout verification option, for verify=
3044 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3045 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3047 12. Inserted some casts to stop certain compilers warning when using pointer
3048 differences as field lengths or precisions in printf-type calls (mostly
3049 affecting debugging statements).
3051 13. Added optional readline() support for -be (dynamically loaded).
3053 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3054 same clock tick as a message's arrival, so that its received time was the
3055 same as the "first fail" time on the retry record, and that message
3056 remained on the queue past the ultimate address timeout, every queue runner
3057 would try a delivery (because it was past the ultimate address timeout) but
3058 after another failure, the ultimate address timeout, which should have then
3059 bounced the address, did not kick in. This was a "< instead of <=" error;
3060 in most cases the first failure would have been in the next clock tick
3061 after the received time, and all would be well.
3063 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3064 being recognized when the domain list was tested by the match_domain
3065 condition in an expansion string.
3067 16. Added the ${str2b64: operator.
3069 17. Exim was always calling setrlimit() to set a large limit for the number of
3070 processes, without checking whether the existing limit was already
3071 adequate. (It did check for the limit on file descriptors.) Furthermore,
3072 errors from getrlimit() and setrlimit() were being ignored. Now they are
3073 logged to the main and panic logs, but Exim does carry on, to try to do its
3074 job under whatever limits there are.
3076 18. Imported PCRE 5.0.
3078 19. Trivial typo in log message " temporarily refused connection" (the leading
3081 20. If the log selector return_path_on_delivery was set and an address was
3082 redirected to /dev/null, the delivery process crashed because it assumed
3083 that a return path would always be set for a "successful" delivery. In this
3084 case, the whole delivery is bypassed as an optimization, and therefore no
3087 21. Internal re-arrangement: the function for sending a challenge and reading
3088 a response while authentication was assuming a zero-terminated challenge
3089 string. It's now changed to take a pointer and a length, to allow for
3090 binary data in such strings.
3092 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3094 23. Exim was not respecting finduser_retries when seeking the login of the
3095 uid under which it was called; it was always trying 10 times. (The default
3096 setting of finduser_retries is zero.) Also, it was sleeping after the final
3097 failure, which is pointless.
3099 24. Implemented tls_on_connect_ports.
3101 25. Implemented acl_smtp_predata.
3103 26. If the domain in control=submission is set empty, Exim assumes that the
3104 authenticated id is a complete email address when it generates From: or
3105 Sender: header lines.
3107 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3108 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3109 chown and chgrp in /bin and hostname in /usr/bin.
3111 28. Exim was keeping the "process log" file open after each use, just as it
3112 does for the main log. This opens the possibility of it remaining open for
3113 long periods when the USR1 signal hits a daemon. Occasional processlog
3114 errors were reported, that could have been caused by this. Anyway, it seems
3115 much more sensible not to leave this file open at all, so that is what now
3118 29. The long-running daemon process does not normally write to the log once it
3119 has entered its main loop, and it closes the log before doing so. This is
3120 so that log files can straightforwardly be renamed and moved. However,
3121 there are a couple of unusual error situations where the daemon does write
3122 log entries, and I had neglected to close the log afterwards.
3124 30. The text of an SMTP error response that was received during a remote
3125 delivery was being truncated at 512 bytes. This is too short for some of
3126 the long messages that one sometimes sees. I've increased the limit to
3129 31. It is now possible to make retry rules that apply only when a message has a
3130 specific sender, in particular, an empty sender.
3132 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3133 it possible to be selective about when SMTP synchronization is enforced.
3135 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3137 32. Implemented hosts_connection_nolog.
3139 33. Added an ACL for QUIT.
3141 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3144 35. Added mailbox_size and mailbox_filecount to appendfile.
3146 36. Added control = no_multiline_responses to ACLs.
3148 37. There was a bug in the logic of the code that waits for the clock to tick
3149 in the case where the clock went backwards by a substantial amount such
3150 that the microsecond fraction of "now" was more than the microsecond
3151 fraction of "then" (but the whole seconds number was less).
3153 38. Added support for the libradius Radius client library this is found on
3154 FreeBSD (previously only the radiusclient library was supported).
3160 1. When certain lookups returned multiple values in the form name=value, the
3161 quoting of the values was not always being done properly. Specifically:
3162 (a) If the value started with a double quote, but contained no whitespace,
3164 (b) If the value contained whitespace other than a space character (i.e.
3165 tabs or newlines or carriage returns) it was not quoted.
3166 This fix has been applied to the mysql and pgsql lookups by writing a
3167 separate quoting function and calling it from the lookup code. The fix
3168 should probably also be applied to nisplus, ibase and oracle lookups, but
3169 since I cannot test any of those, I have not disturbed their existing code.
3171 2. A hit in the callout cache for a specific address caused a log line with no
3172 reason for rejecting RCPT. Now it says "Previous (cached) callout
3173 verification failure".
3175 3. There was an off-by-one bug in the queryprogram router. An over-long
3176 return line was truncated at 256 instead of 255 characters, thereby
3177 overflowing its buffer with the terminating zero. As well as fixing this, I
3178 have increased the buffer size to 1024 (and made a note to document this).
3180 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3181 when Exim is waiting for an SMTP response from a remote server, Exim
3182 restarts its select() call on the socket, thereby resetting its timeout.
3183 This is not a problem when such interrupts are rare. Somebody set up a cron
3184 job to run exiwhat every 2 minutes, which is less than the normal select()
3185 timeout (5 or 10 minutes). This meant that the select() timeout never
3186 kicked in because it was always reset. I have fixed this by comparing the
3187 time when an interrupt arrives with the time at the start of the first call
3188 to select(). If more time than the timeout has elapsed, the interrupt is
3189 treated as a timeout.
3191 5. Some internal re-factoring in preparation for the addition of Sieve
3192 extensions (by MH). In particular, the "personal" test is moved to a
3193 separate function, and given an option for scanning Cc: and Bcc: (which is
3194 not set for Exim filters).
3196 6. When Exim created an email address using the login of the caller as the
3197 local part (e.g. when creating a From: or Sender: header line), it was not
3198 quoting the local part when it contained special characters such as @.
3200 7. Installed new OpenBSD configuration files.
3202 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3203 try to make them clearer.
3205 9. Callout options, other than the timeout value, were being ignored when
3206 verifying sender addresses in header lines. For example, when using
3208 verify = header_sender/callout=no_cache
3210 the cache was (incorrectly) being used.
3212 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3213 only the Cygwin environment.
3215 11. When return_path_on_delivery was set as a log selector, if different remote
3216 addresses in the same message used different return paths and parallel
3217 remote delivery occurred, the wrong values would sometimes be logged.
3218 (Whenever a remote delivery process finished, the return path value from
3219 the most recently started remote delivery process was logged.)
3221 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3222 lines when AUTH and/or TLS are in use. This is the "received protocol"
3223 field. Exim used to use "asmtp" for authenticated SMTP, without any
3224 indication (in the protocol name) for TLS use. Now it follows the RFC and
3225 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3226 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3227 names appear in log lines as well as in Received: header lines.
3229 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3230 extensions, and comparison tests, and to fix some bugs.
3232 14. Changes to the "personal" filter test:
3234 (1) The test was buggy in that it was just doing the equivalent of
3235 "contains" tests on header lines. For example, if a user's address was
3236 anne@some.where, the "personal" test would incorrectly be true for
3238 To: susanne@some.where
3240 This test is now done by extracting each address from the header in turn,
3241 and checking the entire address. Other tests that are part of "personal"
3242 are now done using regular expressions (for example, to check local parts
3243 of addresses in From: header lines).
3245 (2) The list of non-personal local parts in From: addresses has been
3246 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3247 taken from the Sieve specification recommendations.
3249 (3) If the message contains any header line starting with "List-" it is
3250 treated as non-personal.
3252 (4) The test for "circular" in the Subject: header line has been removed
3253 because it now seems ill-conceived.
3255 15. Minor typos in src/EDITME comments corrected.
3257 16. Installed latest exipick from John Jetmore.
3259 17. If headers_add on a router specified a text string that was too long for
3260 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3261 of string_sprintf() is now avoided.
3263 18. $message_body_size was not set (it was always zero) when running the DATA
3264 ACL and the local_scan() function.
3266 19. For the "mail" command in an Exim filter, no default was being set for
3267 the once_repeat time, causing a random time value to be used if "once" was
3268 specified. (If the value happened to be <= 0, no repeat happened.) The
3269 default is now 0s, meaning "never repeat". The "vacation" command was OK
3270 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3271 (I found it when inspecting the code).
3273 20. There is now an overall timeout for performing a callout verification. It
3274 defaults to 4 times the callout timeout, which applies to individual SMTP
3275 commands during the callout. The overall timeout applies when there is more
3276 than one host that can be tried. The timeout is checked before trying the
3277 next host. This prevents very long delays if there are a large number of
3278 hosts and all are timing out (e.g. when the network connections are timing
3279 out). The value of the overall timeout can be changed by specifying an
3280 additional sub-option for "callout", called "maxwait". For example:
3282 verify = sender/callout=5s,maxwait=20s
3284 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3285 to the end before writing, but this should make it even safer).
3287 22. Exim was forgetting that it had advertised PIPELINING for the second and
3288 subsequent messages on an SMTP connection. It was also not resetting its
3289 memory on STARTTLS and an internal HELO.
3291 23. When Exim logs an SMTP synchronization error within a session, it now
3292 records whether PIPELINING has been advertised or not.
3294 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3295 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3296 rather than long int.
3298 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3300 26. Added the never_mail option to autoreply.
3306 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3307 crash if the getsockname() call failed; this can happen if a connection is
3308 closed very soon after it is established. The problem was simply in the
3309 order in which certain operations were done, causing Exim to try to write
3310 to the SMTP stream before it had set up the file descriptor. The bug has
3311 been fixed by making things happen in the correct order.
3317 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3318 before the connection was closed, thus losing the rejection response.
3320 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3321 some early Solaris releases, but causes trouble in current releases where
3322 socklen_t is defined.
3324 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3327 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3330 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3331 that releasing the top of it at the end releases what was used for sub-
3332 expansions (unless the block got too big). However, discard this block if
3333 the first thing is a variable or header, so that we can use its block when
3334 it is dynamic (useful for very large $message_headers, for example).
3336 6. Lookups now cache *every* query, not just the most recent. A new, separate
3337 store pool is used for this. It can be recovered when all lookup caches are
3338 flushed. Lookups now release memory at the end of their result strings.
3339 This has involved some general refactoring of the lookup sources.
3341 7. Some code has been added to the store_xxx() functions to reduce the amount
3342 of flapping under certain conditions.
3344 8. log_incoming_interface used to affect only the <= reception log lines. Now
3345 it causes the local interface and port to be added to several more SMTP log
3346 lines, for example "SMTP connection from", and rejection lines.
3348 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3350 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3352 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3353 could be overwritten at the end of the current message (or the start of a
3354 new message if it was set in a HELO ACL). The value is now preserved for
3355 the duration of the SMTP connection.
3357 12. If a transport had a headers_rewrite setting, and a matching header line
3358 contained an unqualified address, that address was qualified, even if it
3359 did not match any rewriting rules. The underlying bug was that the values
3360 of the flags that permit the existence of unqualified sender and recipient
3361 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3362 non-local messages, and by -bnq for local messages) were not being
3363 preserved with the message after it was received.
3365 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3366 "next input=" as part of the text comprising the host identity instead of
3367 the correct text. The code was using the same buffer for two different
3368 strings. However, depending on which order the printing function evaluated
3369 its arguments, the bug did not always show up. Under Linux, for example, my
3370 test suite worked just fine.
3372 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3373 doesn't work with some older versions of Perl. It has been changed to "my",
3374 which in any case is probably the better facility to use.
3376 15. A really picky compiler found some instances of statements for creating
3377 error messages that either had too many or two few arguments for the format
3380 16. The size of the buffer for calls to the DNS resolver has been increased
3381 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3382 for addresses that have a lot of PTR records. This alleviates a problem; it
3383 does not fully solve it.
3385 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3386 buffer now truncates the list and logs the incident, which is the same
3387 action as happens when Exim is looking up a host name and its aliases.
3388 Previously in this situation something unpredictable would happen;
3389 sometimes it was "internal error: store_reset failed".
3391 18. If a server dropped the connection unexpectedly when an Exim client was
3392 using GnuTLS and trying to read a response, the client delivery process
3393 crashed while trying to generate an error log message.
3395 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3396 string, for example:
3398 warn message = H1: something\nH2: something
3400 the text was added as a single header line from Exim's point of view
3401 though it ended up OK in the delivered message. However, searching for the
3402 second and subsequent header lines using $h_h2: did not work. This has been
3403 fixed. Similarly, if a system filter added multiple headers in this way,
3404 the routers could not see them.
3406 20. Expanded the error message when iplsearch is called with an invalid key to
3407 suggest using net-iplsearch in a host list.
3409 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3410 ACLs are no longer actually imposed (and a message to that effect is
3413 22. If a "gecos" field in a passwd entry contained escaped characters, in
3414 particular, if it contained a \" sequence, Exim got it wrong when building
3415 a From: or a Sender: header from that name. A second bug also caused
3416 incorrect handling when an unquoted " was present following a character
3417 that needed quoting.
3419 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3420 was not being matched caselessly.
3422 24. Arranged for all hyphens in the exim.8 source to be escaped with
3425 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3426 properly. Recipient callout cache records were still being keyed to include
3427 the sender, even when use_sender was set false. This led to far more
3428 callouts that were necessary. The sender is no longer included in the key
3429 when use_sender is false.
3431 26. Added "control = submission" modifier to ACLs.
3433 27. Added the ${base62d: operator to decode base 62 numbers.
3435 28. dnsdb lookups can now access SRV records.
3437 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3438 the configuration file.
3440 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3441 (-v) mode. This makes the output for a verbose queue run more intelligible.
3443 31. Added a use_postmaster feature to recipient callouts.
3445 32. Added the $body_zerocount variable, containing the number of binary zero
3446 bytes in the message body.
3448 33. The time of last modification of the "new" subdirectory is now used as the
3449 "mailbox time last read" when there is a quota error for a maildir
3452 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3454 35. Added +ignore_unknown as a special item in host lists.
3456 36. Code for decoding IPv6 addresses in host lists is now included, even if
3457 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3458 address was recognized as an IP address, but was then not correctly decoded
3459 into binary, causing unexpected and incorrect effects when compared with
3466 1. Very minor rewording of debugging text in manualroute to say "list of
3467 hosts" instead of "hostlist".
3469 2. If verify=header_syntax was set, and a header line with an unqualified
3470 address (no domain) and a large number of spaces between the end of the
3471 name and the colon was received, the reception process suffered a buffer
3472 overflow, and (when I tested it) crashed. This was caused by some obsolete
3473 code that should have been removed. The fix is to remove it!
3475 3. When running in the test harness, delay a bit after writing a bounce
3476 message to get a bit more predictability in the log output.
3478 4. Added a call to search_tidyup() just before forking a reception process. In
3479 theory, someone could use a lookup in the expansion of smtp_accept_max_
3480 per_host which, without the tidyup, could leave open a database connection.
3482 5. Added the variables $recipient_data and $sender_data which get set from a
3483 lookup success in an ACL "recipients" or "senders" condition, or a router
3484 "senders" option, similar to $domain_data and $local_part_data.
3486 6. Moved the writing of debug_print from before to after the "senders" test
3489 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3490 problems for message scanning, either using a data ACL, or using
3491 local_scan() because the Received: header was not generated till after they
3492 were called (in order to set the time as the time of reception completion).
3493 I have revised the way this works. The header is now generated after the
3494 body is received, but before the ACL or local_scan() are called. After they
3495 are run, the timestamp in the header is updated.
3501 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3502 before starting a queue runner without re-exec. This happened only when
3503 deliver_drop_privilege was set or when the Exim user was set to root. The
3504 effect of the bug was that timeouts during subsequent deliveries caused
3505 crashes instead of being properly handled. The handler is now left at its
3506 default (and expected) setting.
3508 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3509 message, again when deliver_drop_privilege is set or Exim is run as root.
3510 The bug described in (1) was not present in this case, but the tidying up
3511 of the other signals was missing. I have made the two cases consistent.
3513 3. The ignore_target_hosts setting on a manualroute router was being ignored
3514 for hosts that were looked up using the /MX notation.
3516 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3519 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3520 operated on the sender address. After changing the $sender_address to <>
3521 for the sender address verify, Exim was re-instated it as the original
3522 (before rewriting) address, but remembering that it had rewritten it, so it
3523 wasn't rewriting it again. This bug also had the effect of breaking the
3524 sender address verification caching when the sender address was rewritten.
3526 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3527 This has been changed so that if the ip literal address matches
3528 ignore_target_hosts, the router declines.
3530 7. Added expansion conditions match_domain, match_address, and match_local_
3531 part (NOT match_host).
3533 8. The placeholder for the Received: header didn't have a length field set.
3535 9. Added code to Exim itself and to exim_lock to test for a specific race
3536 condition that could lead to file corruption when using MBX delivery. The
3537 issue is with the lockfile that is created in /tmp. If this file is removed
3538 after a process has opened it but before that process has acquired a lock,
3539 there is the potential for a second process to recreate the file and also
3540 acquire a lock. This could lead to two Exim processes writing to the file
3541 at the same time. The added code performs the same test as UW imapd; it
3542 checks after acquiring the lock that its file descriptor still refers to
3543 the same named file.
3545 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3546 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3549 11. Added the smtp_active_hostname option. If used, this will typically be made
3550 to depend on the incoming interface address. Because $interface_address is
3551 not set up until the daemon has forked a reception process, error responses
3552 that can happen earlier (such as "too many connections") no longer contain
3555 12. If an expansion in a condition on a "warn" statement fails because a lookup
3556 defers, the "warn" statement is abandoned, and the next ACL statement is
3557 processed. Previously this caused the whole ACL to be aborted.
3559 13. Added the iplsearch lookup type.
3561 14. Added ident_timeout as a log selector.
3563 15. Added tls_certificate_verified as a log selector.
3565 16. Added a global option tls_require_ciphers (compare the smtp transport
3566 option of the same name). This controls incoming TLS connections.
3568 17. I finally figured out how to make tls_require_ciphers do a similar thing
3569 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3570 before starting the TLS session.
3572 18. Tabs are now shown as \t in -bP output.
3574 19. If the log selector return_path_on_delivery was set, Exim crashed when
3575 bouncing a message because it had too many Received: header lines.
3577 20. If two routers both had headers_remove settings, and the first one included
3578 a superfluous trailing colon, the final name in the first list and the
3579 first name in the second list were incorrectly joined into one item (with a
3580 colon in the middle).
3586 1. Added -C and -D options to the exinext utility, mainly to make it easier
3587 to include in the automated testing, but these could be helpful when
3588 multiple configurations are in use.
3590 2. The exinext utility was not formatting the output nicely when there was
3591 an alternate port involved in the retry record key, nor when there was a
3592 message id as well (for retries that were specific to a specific message
3593 and a specific host). It was also confused by IPv6 addresses, because of
3594 the additional colons they contain. I have fixed the IPv4 problem, and
3595 patched it up to do a reasonable job for IPv6.
3597 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3598 delivery, the log line now contains "pipelined" if PIPELINING was used.
3600 4. An SMTP transport process used to panic and die if the bind() call to set
3601 an explicit outgoing interface failed. This has been changed; it is now
3602 treated in the same way as a connect() failure.
3604 5. A reference to $sender_host_name in the part of a conditional expansion
3605 that was being skipped was still causing a DNS lookup. This no longer
3608 6. The def: expansion condition was not recognizing references to header lines
3609 that used bh_ and bheader_.
3611 7. Added the _cache feature to named lists.
3613 8. The code for checking quota_filecount in the appendfile transport was
3614 allowing one more file than it should have been.
3616 9. For compatibility with Sendmail, the command line option
3624 and sets the incoming protocol and host name (for trusted callers). The
3625 host name and its colon can be omitted when only the protocol is to be set.
3626 Note the Exim already has two private options, -pd and -ps, that refer to
3627 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3628 "s", but I don't think that's a major issue.
3630 10. A number of refactoring changes to the code, none of which should affect
3633 (a) The number of logging options was getting close to filling up the
3634 32-bit word that was used as a bit map. I have split them into two classes:
3635 those that are passed in the argument to log_write(), and those that are
3636 only ever tested independently outside of that function. These are now in
3637 separate 32-bit words, so there is plenty of room for expansion again.
3638 There is no change in the user interface or the logging behaviour.
3640 (b) When building, for example, log lines, the code previously used a
3641 macro that called string_cat() twice, in order to add two strings. This is
3642 not really sufficiently general. Furthermore, there was one instance where
3643 it was actually wrong because one of the argument was used twice, and in
3644 one call a function was used. (As it happened, calling the function twice
3645 did not affect the overall behaviour.) The macro has been replaced by a
3646 function that can join an arbitrary number of extra strings onto a growing
3649 (c) The code for expansion conditions now uses a table and a binary chop
3650 instead of a serial search (which was left over from when there were very
3651 few conditions). Also, it now recognizes conditions like "pam" even when
3652 the relevant support is not compiled in: a suitably worded error message is
3653 given if an attempt is made to use such a condition.
3655 11. Added ${time_interval:xxxxx}.
3657 12. A bug was causing one of the ddress fields not to be passed back correctly
3658 from remote delivery subprocesses. The field in question was not being
3659 subsequently used, so this caused to problems in practice.
3661 13. Added new log selectors queue_time and deliver_time.
3663 14. Might have fixed a bug in maildirsizefile handling that threw up
3664 "unexpected character" debug warnings, and recalculated the data
3665 unnecessarily. In any case, I expanded the warning message to give more
3668 15. Added the message "Restricted characters in address" to the statements in
3669 the default ACL that block characters like @ and % in local parts.
3671 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3672 Three changes have been made:
3674 (a) There was a serious bug; a negative response to MAIL caused the whole
3675 recipient domain to be cached as invalid, thereby blocking all messages
3676 to all local parts at the same domain, from all senders. This bug has
3677 been fixed. The domain is no longer cached after a negative response to
3678 MAIL if the sender used is not empty.
3680 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3683 (c) A new callout option, "use_sender" has been added for people who want
3684 the modified behaviour.
3690 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3693 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3694 indeed breaks things for older releases.
3696 3. Added additional logging to the case where there is a problem reading data
3697 from a filter that is running in a subprocess using a pipe, in order to
3698 try to track down a specific problem.
3700 4. Testing facility fudge: when running in the test harness and attempting
3701 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3702 getting "No route to host". Convert this to a timeout.
3704 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3707 6. Some OS don't have socklen_t but use size_t instead. This affects the
3708 fifth argument of getsockopt() amongst other things. This is now
3709 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3710 can be set for individual OS. I have set it for SunOS5, OSF1, and
3711 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3712 some earlier ones do not.
3714 7. Change 4.30/15 was not doing the test caselessly.
3716 8. The standard form for an IPv6 address literal was being rejected by address
3717 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3718 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3719 this, as well as the form without the "IPv6" on the front (but only when
3720 address literals are enabled, of course).
3722 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3724 10. Exim crashed if a message with an empty sender address specified by -f
3725 encountered a router with an errors_to setting. This could be provoked only
3726 by a command such as
3730 where an empty string was supplied; "<>" did not hit this bug.
3732 11. Installed PCRE release 4.5.
3734 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3735 remained set. It is now erased.
3737 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3738 times from message ids (which are base 36 rather than the normal 62).
3740 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3741 were being counted as actual protocol errors, and logged if the log
3742 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3743 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3744 and DATA following a set of rejected RCPTs do not count as protocol errors.
3745 In other words, Exim assumes they were pipelined, though this may not
3746 actually be the case. Of course, in all cases the client gets an
3747 appropriate error code.
3749 15. If a lookup fails in an ACL condition, a message about the failure may
3750 be available; it is used if testing the ACL cannot continue, because most
3751 such messages specify what the cause of the deferral is. However, some
3752 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3753 that caused an old message to be retained and used if a later statement
3754 caused a defer, replacing the real cause of the deferral.
3756 16. If an IP address had so many PTR records that the DNS lookup buffer
3757 was not large enough to hold them, Exim could crash while trying to process
3758 the truncated data. It now detects and logs this case.
3760 17. Further to 4.21/58, another change has been made: if (and only if) the
3761 first line of a message (the first header line) ends with CRLF, a bare LF
3762 in a subsequent header line has a space inserted after it, so as not to
3763 terminate the header.
3765 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3766 unnecessarily, used atoi() instead of strtol(), and didn't check the
3767 termination when getting file sizes from file names by regex.
3769 19. Completely re-implemented the support for maildirsize files, in the light
3770 of a number of problems with the previous contributed implementation
3771 (4.30/29). In particular:
3773 . If the quota is zero, the maildirsize file is maintained, but no quota is
3776 . If the maildir directory does not exist, it is created before any attempt
3777 to write a maildirsize file.
3779 . The quota value in the file is just a cache; if the quota is changed in
3780 the transport, the new value overrides.
3782 . A regular expression is available for excluding directories from the
3785 20. The autoreply transport checks the characters in options that define the
3786 message's headers; it allows continued headers, but it was checking with
3787 isspace() after an embedded newline instead of explicitly looking for a
3790 21. If all the "regular" hosts to which an address was routed had passed their
3791 expiry times, and had not reached their retry times, the address was
3792 bounced, even if fallback hosts were defined. Now Exim should go on to try
3795 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3796 equivalent code in the SMTP transport. Some hosts send humungous responses
3797 to HELO/EHLO, more than 1024 it seems.
3799 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3800 gives compiler warnings in some environments. I've now done it "properly",
3803 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3804 (because of problems with the built-in one) was declared to return uschar *
3805 instead of char *, causing compiler failure.
3807 25. Fixed a file descriptor leak when processing alias/forward files.
3809 26. Fixed a minor format string issue in dbfn.c.
3811 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3813 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3814 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3817 29. When a sender address is verified, it is cached, to save repeating the test
3818 when there is more than one recipient in a message. However, when the
3819 verification involves a callout, it is possible for different callout
3820 options to be set for different recipients. It is too complicated to keep
3821 track of this in the cache, so now Exim always runs a verification when a
3822 callout is required, relying on the callout cache for the optimization.
3823 The overhead is duplication of the address routing, but this should not be
3826 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3827 to be verified with callout=postmaster, and the main callout worked but the
3828 postmaster check failed, the verification correctly failed. However, if a
3829 subsequent RCPT command asked for sender verification *without* the
3830 postmaster check, incorrect caching caused this verification also to fail,
3833 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3834 it was not caching the DNS options (qualify_single, search_parents) that
3835 were used when the lookup failed. A subsequent lookup with different
3836 options therefore always gave the same answer, though there were cases
3837 where it should not have. (Example: a "domains = !$mx_any" option on a
3838 dnslookup router: the "domains" option is always processed without any
3839 widening, but the router might have qualify_single set.) Now Exim uses the
3840 cached value only when the same options are set.
3842 32. Added John Jetmore's "exipick" utility to the distribution.
3844 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3845 than a timeout (e.g. a certificate is required, and is not provided), an
3846 Exim server now closes the connection immediately. Previously it waited for
3847 the client to close - but if the client is SSL, it seems that they each
3848 wait for each other, leading to a delay before one of them times out.
3850 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3851 maintained 0.8.x compatibility because I don't think many are using it, and
3852 it is clearly obsolete.
3854 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3857 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3858 client certificate was expired. A simple patch fixes this, though I don't
3859 understand the full logic of why the verify callback is called multiple
3862 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3863 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3864 which causes problems with some clients (such as the Certicom SSL Plus
3865 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3866 disables the coutermeasure allowing Eudora to connect."
3868 38. Exim was not checking that a write() to a log file succeeded. This could
3869 lead to Bad Things if a log got too big, in particular if it hit a file
3870 size limit. Exim now panics and dies if it cannot write to a log file, just
3871 as it does if it cannot open a log file.
3873 39. Modified OS/Makefile-Linux so that it now contains
3875 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3877 The two -D definitions ensure that Exim is compiled with large file
3878 support, which makes it possible to handle log files that are bigger than
3881 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3882 instance) a domain was checked against a named list that involved a lookup,
3883 causing $domain_data to be set, then another domain was checked against the
3884 same list, then the first domain was re-checked, the value of $domain_data
3885 after the final check could be wrong. In particular, if the second check
3886 failed, it could be set empty. This bug probably also applied to
3889 41. The strip_trailing_dot option was not being applied to the address given
3890 with the -f command-line option.
3892 42. The code for reading a message's header from the spool was incrementing
3893 $received_count, but never initializing it. This meant that the value was
3894 incorrect (doubled) while delivering a message in the same process in which
3895 it was received. In the most common configuration of Exim, this never
3896 happens - a fresh exec is done - but it can happen when
3897 deliver_drop_privilege is set.
3899 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3900 it now includes up to 150 characters of the unexpected data in the log
3903 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3904 and building data strings. The size of both of these buffers was 10 000
3905 bytes - far larger than anybody would *ever* want, thought I. Needless to
3906 say, somebody hit the limit. I have increased the maximum line length to
3907 20 000 and the maximum data length of concatenated lines to 100 000. I have
3908 also fixed two bugs, because there was no checking on these buffers. Tsk,
3909 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3910 buffer is too small.
3912 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3913 lsearch lookups. Now it does.
3915 46. When parsing a route_list item in a manualroute router, a fixed-length
3916 buffer was used for the list of hosts. I made this 1024 bytes long,
3917 thinking that nobody would ever have a list of hosts that long. Wrong.
3918 Somebody had a whole pile of complicated expansion conditions, and the
3919 string was silently truncated, leading to an expansion error. It turns out
3920 that it is easier to change to an unlimited length (owing to other changes
3921 that have happened since this code was originally written) than to build
3922 structure for giving a limitation error. The length of the item that
3923 expands into the list of hosts is now unlimited.
3925 47. The lsearch lookup could not handle data where the length of text line was
3926 more than 4095 characters. Such lines were truncated, leading to shortened
3927 data being returned. It should now handle lines of any length.
3929 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3930 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3933 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3934 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3935 no longer happens in comment lines. A list of replacements is now placed
3936 at the head of all of the source files, except those whose only change is
3937 to replace PERL_COMMAND in the very first #! line.
3939 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3940 messages on the queue, with a bottom-up merge sort, using code contributed
3941 by Michael Haardt. This should make operations like -bp somewhat faster on
3942 large queues. It won't affect queue runners, except when queue_run_in_order
3945 51. Installed eximstats 1.31 in the distribution.
3947 52. Added support for SRV lookups to the dnslookup router.
3949 53. If an ACL referred to $message_body or $message_body_end, the value was not
3950 reset for any messages that followed in the same SMTP session.
3952 54. The store-handling optimization for building very long strings was not
3953 differentiating between the different store pools. I don't think this
3954 actually made any difference in practice, but I've tidied it.
3956 55. While running the routers to verify a sender address, $sender_address
3957 was still set to the sender address. This is wrong, because when routing to
3958 send a bounce to the sender, it would be empty. Therefore, I have changed
3959 it so that, while verifying a sender address, $sender_address is set to <>.
3960 (There is no change to what happens when verifying a recipient address.)
3962 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3963 target A or AAAA records (if not already returned) without resetting the
3964 qualify_single or search_parents options of the DNS resolver. These are
3965 inappropriate in this case because the targets of MX and SRV records must
3966 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3967 target that, when qualified, matched something in the local domain. These
3968 two options are now turned off when doing these lookups.
3970 57. It seems that at least some releases of Reiserfs (which does not have the
3971 concept of a fixed number of inodes) returns zero and not -1 for the
3972 number of available inodes. This interacted badly with check_spool_inodes,
3973 which assumed that -1 was the "no such thing" setting. What I have done is
3974 to check that the total number of inodes is greater than zero before doing
3975 the test of how many are available.
3977 58. When a "warn" ACL statement has a log_message modifier, the message is
3978 remembered, and not repeated. This is to avoid a lot of repetition when a
3979 message has many recipients that cause the same warning to be written.
3980 Howewer, Exim was preserving the list of already written lines for an
3981 entire SMTP session, which doesn't seem right. The memory is now reset if a
3982 new message is started.
3984 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3985 debugging output unless log_rewrite was also set.
3987 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3988 of (int)(handle) when we know that handle contains (void *)(-1).
3990 61. The Exim daemon panic-logs an error return when it closes the incoming
3991 connection. However "connection reset by peer" seems to be common, and
3992 isn't really an error worthy of noting specially, so that particular error
3995 62. When Exim is trying to find all the local interfaces, it used to panic and
3996 die if the ioctl to get the interface flags failed. However, it seems that
3997 on at least one OS (Solaris 9) it is possible to have an interface that is
3998 included in the list of interfaces, but for which you get a failure error
3999 for this call. This happens when the interface is not "plumbed" into a
4000 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4001 failure of the "get flags" call assumes that the interface is down.
4003 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4004 makes life easier for people who are doing arithmetic on fields extracted
4005 from dates, where you often get leading zeros that should not be
4006 interpreted as octal.
4008 64. Added qualify_domain to the redirect router, to override the global
4011 65. If a pathologically long header line contained very many addresses (the
4012 report of this problem mentioned 10 000) and each of them was rewritten,
4013 Exim could use up a very large amount of memory. (It kept on making new
4014 copies of the header line as it rewrote, and never released the old ones.)
4015 At the expense of a bit more processing, the header rewriting function has
4016 been changed so that it no longer eats memory in this way.
4018 66. The generation of the Received: header has been moved from the time that a
4019 message starts to be received, to the time that it finishes. The timestamp
4020 in the Received: header should now be very close to that of the <= log
4021 line. There are two side-effects of this change:
4023 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4024 logged header lines no longer include the local Received: line, because
4025 it has not yet been created. The same applies to a copy of the message
4026 that is returned to a non-SMTP sender when a message is rejected.
4028 (b) When a filter file is tested using -bf, no additional Received: header
4029 is added to the test message. After some thought, I decided that this
4032 This change does not affect the value of $received_for. It is still set
4033 after address rewriting, but before local_scan() is called.
4035 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4037 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4038 gave an unhelpful panic error message, and a defer error. I have managed to
4039 change this behaviour so that it now rejects any supplied certificate,
4040 which seems right, as the list of acceptable certificates is empty.
4042 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4043 gave an unhelpful defer error. I have not managed to make this reject any
4044 supplied certificates, but the error message it gives is "no certificate
4045 supplied", which is not helpful.
4047 70. exigrep's output now also includes lines that are not associated with any
4048 message, but which match the given pattern. Implemented by a patch from
4049 Martin Sluka, which also tidied up the Perl a bit.
4051 71. Recipient callout verification, like sender verification, was using <> in
4052 the MAIL FROM command. This isn't really the right thing, since the actual
4053 sender may affect whether the remote host accepts the recipient or not. I
4054 have changed it to use the actual sender in the callout; this means that
4055 the cache record is now keyed on a recipient/sender pair, not just the
4056 recipient address. There doesn't seem to be a real danger of callout loops,
4057 since a callout by the remote host to check the sender would use <>.
4058 [SEE ABOVE: changed after hitting problems.]
4060 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4061 temporary errors. However, in the case of such a code being given after
4062 the end of a data transmission (i.e. after ".") Exim was failing to write
4063 a retry record for the message. (Yes, there was some broken host that was
4064 actually sending 8xx at this point.)
4066 73. An unknown lookup type in a host list could cause Exim to panic-die when
4067 the list was checked. (An example that provoked this was putting <; in the
4068 middle of a list instead of at the start.) If this happened during a DATA
4069 ACL check, a -D file could be left lying around. This kind of configuration
4070 error no longer causes Exim to die; instead it causes a defer errror. The
4071 incident is still logged to the main and panic logs.
4073 74. Buglet left over from Exim 3 conversion. The message "too many messages
4074 in one connection" was written to the rejectlog but not the mainlog, except
4075 when address rewriting (yes!) was being logged.
4077 75. Added write_rejectlog option.
4079 76. When a system filter was run not as root (that is, when system_filter_user
4080 was set), the values of the $n variables were not being returned to the
4081 main process; thus, they were not subsequently available in the $sn
4084 77. Added +return_path_on_delivery log selector.
4086 78. A connection timeout was being treated differently from recipients deferred
4087 when testing hosts_max_try with a message that was older than the host's
4088 retry timeout. (The host should not be counted, thus allowing all hosts to
4089 be tried at least once before bouncing.) This may have been the cause of an
4090 occasionally reported bug whereby a message would remain on the queue
4091 longer than the retry timeout, but would be bounced if a delivery was
4092 forced. I say "may" because I never totally pinned down the problem;
4093 setting up timeout/retry tests is difficult. See also the next item.
4095 79. The ultimate address timeout was not being applied to errors that involved
4096 a combination of host plus message (for example, a timeout on a MAIL
4097 command). When an address resolved to a number of possible hosts, and they
4098 were not all tried for each delivery (e.g. because of hosts_max_try), a
4099 message could remain on the queue longer than the retry timeout.
4101 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4104 81. Fixed an obscure SMTP outgoing bug which required at least the following
4105 conditions: (a) there was another message waiting for the same server;
4106 (b) the server returned 5xx to all RCPT commands in the first message so
4107 that the message was not completed; (c) the server dropped the connection
4108 or gave a negative response to the RSET that Exim sends to abort the
4109 transaction. The observed case was a dropped connection after DATA that had
4110 been sent in pipelining mode. That is, the server had advertised PIPELINING
4111 but was not implementing it correctly. The effect of the bug was incorrect
4112 behaviour, such as trying another host, and this could lead to a crash.
4118 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4119 and daemon.c were passed as pointers to ints; they should have been
4120 pointers to socklen_t variables (which are typically unsigned ints).
4122 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4125 3. Fixed a really odd bug that affected only the testing scheme; patching a
4126 certain fixed string in the binary changed the value of another string that
4127 happened to be identical to the end of the original first string.
4129 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4130 name", it returns that address as the IP address. On some operating
4131 systems (e.g. Solaris), it also passes back the IP address string as the
4132 "host name". However, on others (e.g. Linux), it passes back an empty
4133 string. Exim wasn't checking for this, and was changing the host name to an
4134 empty string, assuming it had been canonicized.
4136 5. Although rare, it is permitted to have more than one PTR record for a given
4137 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4138 all the names associated with an address, because they do in Solaris.
4139 However, it seems that they do not in Linux for data that comes from the
4140 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4141 I found this out when I moved to a new Linux workstation and tried to run
4142 the Exim test suite.
4144 To get round this problem I have changed the code so that it now does its
4145 own call to the DNS to look up PTR records when searching for a host name.
4146 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4147 addresses that are only in /etc/hosts are still found.
4149 This behaviour is, however, controlled by an option called host_lookup_
4150 order, which defaults to "bydns:byaddr". If people want to use the other
4151 order, or indeed, just use one or the other means of lookup, they can
4152 specify it in this variable.
4154 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4155 some operating systems, this comes back from gethostbyaddr() as an empty
4156 string, and this is what Exim used to test for. However, it seems that in
4157 other systems, "." is yielded. Exim now tests for this case too.
4159 7. The values of check_spool_space and check_log_space are now held internally
4160 as a number of kilobytes instead of an absolute number of bytes. If a
4161 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4162 kilobyte. This means that much larger values can be stored.
4164 8. Exim monitor: an attempt to get the action menu when not actually pointing
4165 at a message produces an empty menu entitled "No message selected". This
4166 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4167 no entries in it ("Shell widget menu has zero width and/or height"). So I
4168 have added a single, blank menu entry in this case.
4170 9. Added ${quote_local_part.
4172 10. MIME decoding is now applied to the contents of Subject: header lines when
4175 11. Now that a reference to $sender_host_address automatically causes a reverse
4176 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4177 host lookup before query-style lookups in lists that might use this
4178 variable. This has therefore been abolished, and the "net-" prefix is no
4179 longer necessary for query-style lookups.
4181 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4182 have been a typo for LFLAGS, so it has been changed.
4184 13. The install script calls Exim with "-C /dev/null" in order to find the
4185 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4186 to be output. Howeve, since Exim outputs its version number before the
4187 error, it didn't break the script. It just looked ugly. I fixed this by
4188 always allowing "-C /dev/null" if the caller is root.
4190 14. Ignore overlarge ACL variable number when reading spool file - insurance
4191 against a later release with more variables having written the file.
4193 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4194 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4195 this, as well as the form without the "IPv6" on the front.
4197 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4198 OS/Makefile-Darwin file.
4200 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4201 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4203 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4204 variable. However, some OS use ints for inodes. I've added cast to long int
4205 to get rid of the compiler warning.
4207 19. I had forgotten to lock out "/../" in configuration file names when
4208 ALT_CONFIG_PREFIX was set.
4210 20. Routers used for verification do not need to specify transports. However,
4211 if such a router generated a host list, and callout was configured, Exim
4212 crashed, because it could not find a port number from the (non-existent)
4213 transport. It now assumes port 25 in this circumstance.
4215 21. Added the -t option to exigrep.
4217 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4218 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4219 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4220 them is set, LOOKUP_LSEARCH is forced.
4222 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4224 24. Added sender and host information to the "rejected by local_scan()" log
4225 line; previously there was no indication of these.
4227 25. Added .include_if_exists.
4229 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4230 Linux. It turns out that not all file systems support this. Apparently some
4231 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4232 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4233 not supported on the file descriptor, is now ignored when Exim is trying to
4234 sync a directory. This applies only to Linux.
4236 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4238 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4239 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4242 29. Added support for maildirsize files from supplied patch (modified a bit).
4244 30. The use of :fail: followed by an empty string could lead Exim to respond to
4245 sender verification failures with (e.g.):
4247 550 Verification failed for <xxx>
4248 550 Sender verify failed
4250 where the first response line was missing the '-' that indicates it is not
4251 the final line of the response.
4253 31. The loop for finding the name of the user that called Exim had a hardwired
4254 limit of 10; it now uses the value of finduser_retries, which is used for
4255 all other user lookups.
4257 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4260 33. Exim was neglecting to zero errno before one call of strtol() when
4261 expanding a string and expecting an integer value. On some systems this
4262 resulted in spurious "integer overflow" errors. Also, it was casting the
4263 result into an int without checking.
4265 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4266 did not work. The code looks as if it has *never* worked, though it appears
4267 to have been documented since at least releast 1.62. I have made it work.
4269 35. The "timeout_DNS" error in retry rules, also documented since at least
4270 1.62, also never worked. As it isn't clear exactly what this means, and
4271 clearly it isn't a major issue, I have abolished the feature by treating it
4272 as "timeout", and writing a warning to the main and panic logs.
4274 36. The display of retry rules for -brt wasn't always showing the error code
4277 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4278 timeout_connect_A, timeout_connect_MX.
4280 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4281 to the empty sender.
4283 39. The daemon was not analysing the content of -oX till after it had closed
4284 stderr and disconnected from the controlling terminal. This meant that any
4285 syntax errors were only noted on the panic log, and the return code from
4286 the command was 0. By re-arranging the code a little, I've made the
4287 decoding happen first, so such errors now appear on stderr, and the return
4288 code is 1. However, the actual setting up of the sockets still happens in
4289 the disconnected process, so errors there are still only recorded on the
4292 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4293 connections (as happens on some IP stacks) was logged at start up time as
4294 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4295 it from "IPv6 and IPv4", which means that two separate sockets are being
4298 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4299 says whether AF_INET or AF_INET6 was passed as an argument.
4301 42. Exiwhat output was messed up when time zones were included in log
4304 43. Exiwhat now gives more information about the daemon's listening ports,
4305 and whether -tls-on-connect was used.
4307 44. The "port" option of the smtp transport is now expanded.
4309 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4310 silently ignored. Now an error message is written to the main and panic
4313 46. There's a new ACL modifier called "logwrite" which writes to a log file
4314 as soon as it is encountered.
4316 47. Added $local_user_uid and $local_user_gid at routing time.
4318 48. Exim crashed when trying to verify a sender address that was being
4321 49. Exim was recognizing only a space character after ".include". It now also
4322 recognizes a tab character.
4324 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4325 extracting the relevant information from the specification. The man page no
4326 longer contains scrambled data for the -d option, and I've added a section
4327 at the front about calling Exim under different names.
4329 51. Added "extra_headers" argument to the "mail" command in filter files.
4331 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4334 53. Installed eximstats 1.29.
4336 54. Added transport_filter_timeout as a generic transport option.
4338 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4339 Cc: header lines. This was required by RFC 822, but it not required by RFC
4342 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4343 incoming messages that did not have them. Now it does so only if the
4344 message originates locally, that is, if there is no associated remote host
4345 address. When Resent- header lines are present, this applies to the Resent-
4346 lines rather than the non-Resent- lines.
4348 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4349 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4351 58. Messages for configuration errors now include the name of the main
4352 configuration file - useful now that there may be more than one file in a
4353 list (.included file names were always shown).
4355 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4356 for those rare installations that do not start the daemon as root or run it
4357 setuid root. I've cut out the call to initgroups() if the daemon is not
4360 60. The Exim user and group can now be bound into the binary as text strings
4361 that are looked up at the start of Exim's processing.
4363 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4365 62. Added $mailstore_basename variable.
4367 63. Installed patch to sieve.c from Michael Haardt.
4369 64. When Exim failed to open the panic log after failing to open the main log,
4370 the original message it was trying to log was written to stderr and debug
4371 output, but if they were not available (the usual case in production), it
4372 was lost. Now it is written to syslog before the two lines that record the
4373 failures to open the logs.
4375 65. Users' Exim filters run in subprocesses under the user's uid. It is
4376 possible for a "deliver" command or an alias in a "personal" command to
4377 provoke an address rewrite. If logging of address rewriting is configured,
4378 this fails because the process is not running as root or exim. There may be
4379 a better way of dealing with this, but for the moment (because 4.30 needs
4380 to be released), I have disabled address rewrite logging when running a
4381 filter in a non-root, non-exim process.
4387 1. The buildconfig auxiliary program wasn't quoting the value set for
4388 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4389 not defined. This bug was masked in 4.22 by the effect that was fixed in
4392 2. Some messages that were rejected after a message id was allocated were
4393 shown as "incomplete" by exigrep. It no longer does this for messages that
4394 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4396 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4397 have allow_domain_literals set, the ID did not get logged in the <= line.
4398 Domain literals are now always recognized in Message-ID: header lines.
4400 4. The first argument for a ${extract expansion item is the key name or field
4401 number. Leading and trailing spaces in this item were not being ignored,
4402 causing some misleading effects.
4404 5. When deliver_drop_privilege was set, single queue runner processes started
4405 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4406 same command in the process it spins off) were not dropping privilege.
4408 6. When the daemon running as "exim" started a queue runner, it always
4409 re-executed Exim in the spun-off process. This is a waste of effort when
4410 deliver_drop_privilege is set. The new process now just calls the
4411 queue-runner function directly.
4417 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4420 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4421 ignored. Though the use of -oP was forcing the writing of a pid file, it
4422 was always written to the default place.
4424 3. If the message "no IP address found for host xxxx" is generated during
4425 incoming verification, it is now followed by identification of the incoming
4426 connection (so you can more easily find what provoked it).
4428 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4430 5. Added some features to "harden" Exim a bit more against certain attacks:
4432 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4433 be put in Local/Makefile. This is like the never_users runtime option,
4434 but it cannot be overridden. The default setting is "root".
4436 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4437 prefix string with which any file named in a -C command line option
4440 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4441 is retained for -C and -D only if the caller of Exim is root. Without
4442 it, the exim user may also use -C and -D and retain privilege.
4444 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4445 command line option is disabled.
4447 6. Macro names set by the -D option must start with an upper case letter, just
4448 like macro names defined in the configuration file.
4450 7. Added "dereference=" facility to LDAP.
4452 8. Two instances of the typo "uknown" in the source files are fixed.
4454 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4455 the Configure-Makefile script screwed up while processing it.
4457 10. Incorporated PCRE 4.4.
4459 11. The SMTP synchronization check was not operating right at the start of an
4460 SMTP session. For example, it could not catch a HELO sent before the client
4461 waited for the greeting. There is now a check for outstanding input at the
4462 point when the greeting is written. Because of the duplex, asynchronous
4463 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4464 way, but not yet received, when the check is performed.
4466 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4467 on TCP/IP sockets, because this apparently causes some broken clients to
4470 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4471 unchanged) from the Cygwin maintainer.
4473 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4474 was supported instead of testing for mbx. Effectively a typo.
4476 15. The spa authenticator server code was not checking that the input it
4477 received was valid base64.
4479 16. The debug output line for the "set" modifier in ACLs was not showing the
4480 name of the variable that was being set.
4482 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4484 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4485 lookup on its own. Something else was needed to trigger the lookup. For
4486 example, a match in host_lookup or the need for a host name in a host list.
4487 Now, if $sender_host_name is referenced and the host name has not yet been
4488 looked up, a lookup is performed. If the lookup fails, the variable remains
4489 empty, and $host_lookup_failed is set to "1".
4491 19. Added "eqi" as a case-independent comparison operator.
4493 20. The saslauthd authentication condition could segfault if neither service
4494 nor realm was specified.
4496 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4497 error message that was logged was misleading, and incoming SMTP
4498 connections were dropped. The message is now more accurate, and temporary
4499 errors are given to SMTP connections.
4501 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4502 (except RSET) with a 421 error, until QUIT is received. However, it was
4503 failing to send a response to QUIT.
4505 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4506 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4507 ACL is now run after the helo_try_verify_hosts code.
4509 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4510 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4511 case-independent, so other case variants are also recognized). Apparently
4512 some systems use these upper case variants.
4514 25. If more than two messages were waiting for the same host, and a transport
4515 filter was specified for the transport, Exim sent two messages over the
4516 same TCP/IP connection, and then failed with "socket operation on non-
4517 socket" when it tried to send the third.
4519 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4521 27. The extern definition of crypt16() in expand.c was not being excluded when
4522 the OS had its own crypt16() function.
4524 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4525 as a preferred synonym for return_size_limit, both as an option and as an
4528 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4530 30. Changed the default configuration ACL to relax the local part checking rule
4531 for addresses that are not in any local domains. For these addresses,
4532 slashes and pipe symbols are allowed within local parts, but the sequence
4533 /../ is explicitly forbidden.
4535 31. SPA server authentication was not clearing the challenge buffer before
4538 32. log_message in a "warn" ACL statement was writing to the reject log as
4539 well as to the main log, which contradicts the documentation and doesn't
4540 seem right (because no rejection is happening). So I have stopped it.
4542 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4543 However, I am unable to do any testing of this.
4545 34. Fixed an infelicity in the appendfile transport. When checking directories
4546 for a mailbox, to see if any needed to be created, it was accidentally
4547 using path names with one or more superfluous leading slashes; tracing
4548 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4550 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4551 contents are added to the log line that is written for every discarded
4552 recipient. (Previously a log_message setting was ignored.)
4554 36. The ${quote: operator now quotes the string if it is empty.
4556 37. The install script runs exim in order to find its version number. If for
4557 some reason other than non-existence or emptiness, which it checks, it
4558 could not run './exim', it was installing it with an empty version number,
4559 i.e. as "exim-". This error state is now caught, and the installation is
4562 38. An argument was missing from the function that creates an error message
4563 when Exim fails to connect to the socket for saslauthd authentication.
4564 This could cause Exim to crash, or give a corrupted message.
4566 39. Added isip, isip4, and isip6 to ${if conditions.
4568 40. The ACL variables $acl_xx are now saved with the message, and can be
4569 accessed later in routers, transports, and filters.
4571 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4572 strings in the file are not string-expanded.
4574 42. If a MAIL command specified a SIZE value that was too large to fit into an
4575 int variable, the check against message_size_limit failed. Such values are
4576 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4577 day this will have to be increased, but I don't think I want to be around
4578 when emails are that large.
4585 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4586 iconv() is not standard in FreeBSD.
4588 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4589 IPv6 enabled. The observed symptom was a segmentation fault on return from
4590 the function os_common_find_running_interfaces() in src/os.c.
4592 3. In the check_special_case() function in daemon.c I had used "errno" as an
4593 argument name, which causes warnings on some systems. This was basically a
4594 typo, since it was named "eno" in the comments!
4596 4. The code that waits for the clock to tick (at a resolution of some fraction
4597 of a second) so as to ensure message-id uniqueness was always waiting for
4598 at least one whole tick, when it could have waited for less. [This is
4599 almost certainly not relevant at current processor speeds, where it is
4600 unlikely to ever wait at all. But we try to future-proof.]
4602 5. The function that sleeps for a time interval that includes fractions of a
4603 second contained a race. It did not block SIGALRM between setting the
4604 timer, and suspending (a couple of lines later). If the interval was short
4605 and the sigsuspend() was delayed until after it had expired, the suspension
4606 never ended. On busy systems this could lead to processes getting stuck for
4609 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4610 process, before it forks any delivery processes. The open lookup caching
4611 mechanism meant that the open file or database connection was passed into
4612 the delivery process. The problem was that delivery processes always tidy
4613 up cached lookup data. This could cause a problem for the next delivery
4614 process started by the queue runner, because the external queue runner
4615 process does not know about the closure. So the next delivery process
4616 still has data in the lookup cache. In the case of a file lookup, there was
4617 no problem because closing a file descriptor in a subprocess doesn't affect
4618 the parent. However, if the lookup was caching a connection to a database,
4619 the connection was closed, and the second delivery process was likely to
4620 see errors such as "PGSQL: query failed: server closed the connection
4621 unexpectedly". The problem has been fixed by closing all cached lookups
4622 in a queue runner before running a delivery process.
4624 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4625 seem to have the "const" qualifier which it has on other OS. I've
4628 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4629 *of the same type* (client or server) with the same public name that an
4630 error should be diagnosed.
4632 9. When Exim looked up a host name for an IP address, but failed to find the
4633 original IP address when looking up the host name (a safety check), it
4634 output the message "<ip address> does not match any IP for NULL", which was
4635 confusing, to say the least. The bug was that the host name should have
4636 appeared instead of "NULL".
4638 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4639 user that is built into the binary, and the -C or -D options is used, root
4640 privilege is dropped before the configuration file is read. In addition,
4641 logging is switched to stderr instead of the normal log files. If the
4642 configuration then re-defines the Exim user, the unprivileged environment
4643 is probably not what is expected, so Exim logs a panic warning message (but
4646 However, if deliver_drop_privilege is set, the unprivileged state may well
4647 be exactly what is intended, so the warning has been cut out in that case,
4648 and Exim is allowed to try to write to its normal log files.
4654 1. smtp_return_error_details was not giving details for temporary sender
4655 or receiver verification errors.
4657 2. Diagnose a configuration error if two authenticators have the same public
4660 3. Exim used not to create the message log file for a message until the first
4661 delivery attempt. This could be confusing when incoming messages were held
4662 for policy or load reasons. The message log file is now created at the time
4663 the message is received, and an initial "Received" line is written to it.
4665 4. The automatically generated man page for command line options had a minor
4666 bug that caused no ill effects; however, a more serious problem was that
4667 the procedure for building the man page automatically didn't always
4668 operate. Consequently, release 4.20 contains an out-of-date version. This
4669 shouldn't happen again.
4671 5. When building Exim with embedded Perl support, the script that builds the
4672 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4673 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4675 6. The freeze_tell option was not being used for messages that were frozen on
4676 arrival, either by an ACL or by local_scan().
4678 7. Added the smtp_incomplete_transaction log selector.
4680 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4681 was accepting AUTH without a new EHLO.
4683 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4684 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4687 10. Logging of TCP/IP connections (when configured) now happens in the main
4688 daemon process instead of the child process, so that the TCP/IP connection
4689 count is more accurate (but it can never be perfect).
4691 11. The use of "drop" in a nested ACL was not being handled correctly in the
4692 outer ACL. Now, if condition failure induced by the nested "drop" causes
4693 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4694 or "require"), the connection is dropped.
4696 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4697 that yield "discard" can now be used with an "accept" or a "discard" verb,
4698 but an error is generated for any others (because I can't see a useful way
4699 to define what should happen).
4701 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4702 are now processed in the same way as lines in the Exim configuration file.
4703 In particular, continuation lines are supported.
4705 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4707 15. Added -ti meaning -t -i.
4709 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4710 domains, and warn by logging if others are found.
4712 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4713 returned from GIFCONF when Exim is trying to find the list of interfaces on
4714 a host. The code in os.c has been modified to copy each ifreq to an aligned
4715 structure in all cases.
4717 Also, in some cases, the returned ifreq's were being copied to a 'struct
4718 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4719 means the last couple of bytes of an IPv6 address could be chopped if the
4720 ifreq contained only a normal sockaddr (14 bytes storage).
4722 18. Named domain lists were not supported in the hosts_treat_as_local option.
4723 An entry such as +xxxx was not recognized, and was treated as a literal
4726 19. Ensure that header lines added by a DATA ACL are included in the reject log
4727 if the ACL subsequently rejects the message.
4729 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4730 MD5 (which is deprecated).
4732 21. When testing a filter file using -bf, Exim was writing a message when it
4733 took the sender from a "From " line in the message, but it was not doing so
4734 when it took $return_path from a Return-Path: header line. It now does.
4736 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4737 with a valid header line field name (a series of printing characters
4738 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4740 23. Changed "disc" in the source to "disk" to conform to the documentation and
4741 the book and for uniformity.
4743 24. Ignore Sendmail's -Ooption=value command line item.
4745 25. When execve() failed while trying to run a command in a pipe transport,
4746 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4747 could be confused with a return value of 69 from the command itself. This
4748 has been changed to 127, the value the shell returns if it is asked to run
4749 a non-existent command. The wording for the related log line suggests a
4750 non-existent command as the problem.
4752 26. If received_header_text expands to an empty string, do not add a Received:
4753 header line to the message. (Well, it adds a token one on the spool, but
4754 marks it "old" so that it doesn't get used or transmitted.)
4756 27. Installed eximstats 1.28 (addition of -nt option).
4758 28. There was no check for failure on the call to getsockname() in the daemon
4759 code. This can fail if there is a shortage of resources on the system, with
4760 ENOMEM, for example. A temporary error is now given on failure.
4762 29. Contrary to the C standard, it seems that in some environments, the
4763 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4764 program. Exim now does this explicitly; it affects the formatting of
4765 timestamps using strftime().
4767 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4768 complaints. I've now initialized all the variables, to avoid this.
4770 32. Header lines added by a system filter were not being "seen" during
4771 transport-time rewrites.
4773 33. The info_callback() function passed to OpenSSL is set up with type void
4774 (*)(SSL *, int, int), as described somewhere. However, when calling the
4775 function (actually a macro) that sets it up, the type void(*)() is
4776 expected. I've put in a cast to prevent warnings from picky compilers.
4778 34. If a DNS black list lookup found a CNAME record, but there were no A
4779 records associated with the domain it pointed at, Exim crashed.
4781 35. If a DNS black list lookup returned more than one A record, Exim ignored
4782 all but the first. It now scans all returned addresses if a particular IP
4783 value is being sought. In this situation, the contents of the
4784 $dnslist_value variable are a list of all the addresses, separated by a
4787 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4788 to accept a host name and all its aliases if the forward lookup for any of
4789 them yielded the IP address of the incoming connection. Now it accepts only
4790 those names whose forward lookup yields the correct IP address. Any other
4791 names are discarded. This closes a loophole whereby a rogue DNS
4792 administrator could create reverse DNS records to break through a
4793 wildcarded host restriction in an ACL.
4795 37. If a user filter or a system filter that ran in a subprocess used any of
4796 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4797 the wrong values were passed to the pipe command ($thisaddress had the
4798 value of $0, $0 had the value of $1, etc). This bug was introduced by
4799 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4801 38. Improved the line breaking for long SMTP error messages from ACLs.
4802 Previously, if there was no break point between 40 and 75 characters, Exim
4803 left the rest of the message alone. Two changes have been made: (a) I've
4804 reduced the minimum length to 35 characters; (b) if it can't find a break
4805 point between 35 and 75 characters, it looks ahead and uses the first one
4806 that it finds. This may give the occasional overlong line, but at least the
4807 remaining text gets split now.
4809 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4810 file descriptors might be low, and that setting 1000 would always raise it.
4811 It turns out that in some environments, the limit is already over 1000 and
4812 that lowering it causes trouble. So now Exim takes care not to decrease it.
4814 40. When delivering a message, the value of $return_path is set to $sender_
4815 address at the start of routing (routers may change the value). By an
4816 oversight, this default was not being set up when an address was tested by
4817 -bt or -bv, which affected the outcome if any router or filter referred to
4820 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4821 log only when "message" or "log_message" are set. However, if one of the
4822 conditions was an address verification, or a call to a nested ACL, the
4823 messages generated by the underlying test were being passed through. This
4824 no longer happens. The underlying message is available in $acl_verify_
4825 message for both "message" and "log_message" expansions, so it can be
4826 passed through if needed.
4828 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4829 new expansion $bh_ to give the encoded byte string without charset
4830 translation. Translation happens only if iconv() is available; HAVE_ICONV
4831 indicates this at build time. HEADERS_CHARSET gives the charset to
4832 translate to; headers_charset can change it in the configuration, and
4833 "headers charset" can change it in an individual filter file.
4835 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4836 that creates RFC 2047 encoded "words" labels them as that charset instead
4837 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4838 expansion operator; (ii) when Exim creates a From: line for a local
4839 message; (iii) when a header line is rewritten to include a "phrase" part.
4841 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4842 buggy, causing it to skip the first lines of messages whose message ID
4843 ended in 'D'. This would not have bitten before Exim release 4.14, because
4844 message IDs were unlikely to end in 'D' before then. The effect was to have
4845 incorrect size information for certain domains.
4847 45. #include "config.h" was missing at the start of the crypt16.c module. This
4848 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4851 46. If there was a timeout during a "random" callout check, Exim treated it as
4852 a failure of the random address, and carried on sending RSET and the real
4853 address. If the delay was just some slowness somewhere, the response to the
4854 original RCPT would be taken as a response to RSET and so on, causing
4855 mayhem of various kinds.
4857 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4858 when I implemented it. It didn't allow for the fact that some option values
4859 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4860 the right test for positive values.
4862 48. Domain names in DNS records are case-independent. Exim always looks them up
4863 in lower case. Some resolvers return domain names in exactly the case they
4864 appear in the zone file, that is, they may contain uppercase letters. Not
4865 all resolvers do this - some return always lower case. Exim was treating a
4866 change of case by a resolver as a change of domain, similar to a widening
4867 of a domain abbreviation. This triggered its re-routing code and so it was
4868 trying to route what was effectively the same domain again. This normally
4869 caused routing to fail (because the router wouldn't handle the domain
4870 twice). Now Exim checks for this case specially, and just changes the
4871 casing of the domain that it ultimately uses when it transmits the message
4874 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4877 50. If a filter generated a file delivery with a non-absolute name (possible if
4878 no home directory exists for the router), the forbid_file option was not
4881 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4882 the existing equality matching.
4884 52. Exim was using ints instead of ino_t variables in some places where it was
4885 dealing with inode numbers.
4887 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4888 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4889 called TMPDIR, and if it finds it is different, it changes its value.
4891 54. The smtp_printf() function is now made available to local_scan() so
4892 additional output lines can be written before returning. There is also an
4893 smtp_fflush() function to enable the detection of a dropped connection.
4894 The variables smtp_input and smtp_batched_input are exported to
4897 55. Changed the default runtime configuration: the message "Unknown user"
4898 has been removed from the ACL, and instead placed on the localuser router,
4899 using the cannot_route_message feature. This means that any verification
4900 failures that generate their own messages won't get overridden. Similarly,
4901 the "Unrouteable address" message that was in the ACL for unverifiable
4902 relay addresses has also been removed.
4904 56. Added hosts_avoid_esmtp to the smtp transport.
4906 57. The exicyclog script was not checking for the esoteric option
4907 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4908 will work only if exicyclog is run under the appropriate euid.
4910 58. Following a discussion on the list, the rules by which Exim recognises line
4911 endings on incoming messages have been changed. The -dropcr and drop_cr
4912 options are now no-ops, retained only for backwards compatibility. The
4913 following line terminators are recognized: LF CRLF CR. However, special
4914 processing applies to CR:
4916 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4917 nor a local message in the state where . is a terminator.
4919 (ii) If a bare CR is encountered in a header line, an extra space is added
4920 after the line terminator so as not to end the header. The reasoning
4921 behind this is that bare CRs in header lines are most likely either
4922 to be mistakes, or people trying to play silly games.
4924 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4925 was being incorrectly given as 18 bytes larger than it should have been.
4926 This is a VOB (very old bug).
4928 60. This may never have affected anything current, but just in case it has:
4929 When the local host is found other than at the start of a list of hosts,
4930 the local host, those with the same MX, and any that follow, are discarded.
4931 When the list in question was part of a longer list of hosts, the following
4932 hosts (not currently being processed) were also being discarded. This no
4933 longer happens. I'm not sure if this situation could ever has previously
4936 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4939 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4940 header. This is something that is recommended in a new Internet Draft, and
4941 is something that is documented as being done by Sendmail. There are two
4942 possible values. For messages generated by the autoreply transport, Exim
4945 Auto-Submitted: auto-replied
4947 whereas for all other generated messages (e.g. bounces) it adds
4949 Auto-Submitted: auto-generated
4951 63. The "personal" condition in filters now includes a test for the
4952 Auto-Submitted: header. If it contains the string "auto-" the message it
4953 not considered personal.
4955 64. Added rcpt_include_affixes as a generic transport option.
4957 65. Added queue_only_override (default true).
4959 66. Added the syslog_duplication option.
4961 67. If what should have been the first header line of a message consisted of
4962 a space followed by a colon, Exim was mis-interpreting it as a header line.
4963 It isn't of course - it is syntactically invalid and should therefore be
4964 treated as the start of the message body. The misbehaviour could have
4965 caused a number of strange effects, including loss of data in subsequent
4966 header lines, and spool format errors.
4968 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4969 client host had authenticated. This control can now be exercised by an ACL
4970 for more flexibility.
4972 69. By default, callouts do not happen when testing with -bh. There is now a
4973 variant, -bhc, which does actually run the callout code, including
4974 consulting and updating the callout cache.
4976 70. Added support for saslauthd authentication, courtesy of Alexander
4979 71. If statvfs() failed on the spool or log directories while checking their
4980 size for availability, Exim confusingly gave the error "space shortage".
4981 Furthermore, in debugging mode it crashed with a floating point exception.
4982 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4983 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4984 serious problem, Exim now writes to the main and panic logs when this
4985 happens, with details of the failure. It then refuses to accept the
4986 incoming message, giving the message "spool directory problem" or "log
4987 directory problem" with a 421 code for SMTP messages.
4989 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4990 0, 1, and 2 exist, because some OS complain for execs without them (see
4991 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4992 descriptors. However, the code omitted to check that the open succeeded,
4993 causing mysterious errors if for some reason the permissions on /dev/null
4994 got screwed. Now Exim writes a message to the main and panic logs, and
4995 bombs out if it can't open /dev/null.
4997 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4998 interact so that it is all more flexible. It is supposed to remain
4999 backwards compatible. Also added extra_local_interfaces.
5001 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5002 to bomb out with an assertion failure - to the client this appears as a
5003 connection drop. This problem occurs in the part of the code that was taken
5004 from the Samba project. Fortunately, the assertion is in a very simple
5005 function, so I have fixed this by reproducing the function inline in the
5006 one place where it is called, and arranging for authentication to fail
5007 instead of killing the process with assert().
5009 75. The SPA client code was not working when the server requested OEM rather
5010 than Unicode encoding.
5012 76. Added code to make require_files with a specific uid setting more usable in
5013 the case where statting the file as root fails - usually a non-root-mounted
5014 NFS file system. When this happens and the failure is EACCES, Exim now
5015 forks a subprocess and does the per-uid checking as the relevant uid.
5017 77. Added process_log_path.
5019 78. If log_file_path was not explicitly set, a setting of check_log_space or
5020 check_log_inodes was ignored.
5022 79. If a space check for the spool or log partitions fails, the incident is now
5023 logged. Of course, in the latter case the data may get lost...
5025 80. Added the %p formatting code to string_format() so that it can be used to
5026 print addresses in debug_print(). Adjusted all the address printing in the
5027 debugging in store.c to use %p rather than %d.
5029 81. There was a concern that a line of code in smtp_in.c could overflow a
5030 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5031 initially expressed, the concern was not well-founded, because trailing
5032 spaces are removed early. However, if the trailing spaces were followed by
5033 a NULL, they did not get removed, so the overflow was possible. Two fixes
5036 (a) I re-wrote the offending code in a cleaner fashion.
5037 (b) If an incoming SMTP command contains a NULL character, it is rejected
5040 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5041 runs initgroups(), so that if the Exim user is in any additional groups,
5042 they will be used during message reception.
5048 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob