1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.599 2009/11/23 12:27:52 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
11 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
13 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
15 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
17 NM/04 Bugzilla 915: Flag broken perl installation during build.
23 TK/01 Added patch by Johannes Berg that expands the main option
24 "spamd_address" if it starts with a dollar sign.
26 TK/02 Write list of recipients to X-Envelope-Sender header when building
27 the mbox-format spool file for content scanning (suggested by Jakob
30 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
31 (http://www.dcc-servers.net/) support via dccifd. Activated by
32 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
34 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
35 by Mark Daniel Reidel <mr@df.eu>.
37 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
38 When building exim an external PCRE library is now needed -
39 PCRE is a system library on the majority of modern systems.
40 See entry on PCRE_LIBS in EDITME file.
42 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
43 conversation. Added nologin parameter to request.
44 Patch contributed by Kirill Miazine
46 TF/01 Do not log submission mode rewrites if they do not change the address.
48 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
50 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
51 log files in place. Contributed by Roberto Lima
53 NM/04 Bugzilla 667: close socket used by dovecot authenticator
55 TF/03 Bugzilla 615: When checking the local_parts router precondition
56 after a local_part_suffix or local_part_prefix option, Exim now
57 does not use the address's named list lookup cache, since this
58 contains cached lookups for the whole local part.
60 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
61 Robert Millan. Documentation is in experimental-spec.txt
63 TF/04 Bugzilla 668: Fix parallel build (make -j).
65 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
67 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
68 Patch provided by Jan Srzednicki
70 TF/05 Leading white space used to be stripped from $spam_report which
71 wrecked the formatting. Now it is preserved.
73 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
74 that they are available at delivery time.
76 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
78 TF/08 TLS error reporting now respects the incoming_interface and
79 incoming_port log selectors.
81 TF/09 Produce a more useful error message if an SMTP transport's hosts
82 setting expands to an empty string.
84 NM/06 Bugzilla 744: EXPN did not work under TLS.
85 Patch provided by Phil Pennock
87 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
88 Patch provided by Richard Godbee
90 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
91 acl_smtp_notquit, added index entry.
93 NM/09 Bugzilla 787: Potential buffer overflow in string_format
94 Patch provided by Eugene Bujak
96 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
97 Patch provided by Maxim Dounin
99 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
100 Patch provided by Phil Pennock
102 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
104 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
105 Patch provided by Brad "anomie" Jorsch
107 NM/14 Bugzilla 622: Added timeout setting to transport filter.
108 Patch provided by Dean Brooks
110 TK/05 Add native DKIM support (does not depend on external libraries).
112 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
113 Patch provided by Graeme Fowler
115 NM/16 Bugzilla 851: Documentation example syntax fix.
117 NM/17 Changed NOTICE file to remove references to embedded PCRE.
119 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
121 NM/19 Bugzilla 745: TLS version reporting
122 Patch provided by Phil Pennock
124 NM/20 Bugzilla 167: bool: condition support
125 Patch provided by Phil Pennock
127 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
128 Patch provided by Phil Pennock
130 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
131 Patch provided by Brad "anomie" Jorsch
133 NM/23 Bugzilla 687: Fix misparses in eximstats
134 Patch provided by Heiko Schlittermann
136 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
137 Patch provided by Heiko Schlittermann
139 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
140 plus update to original patch.
142 NM/26 Bugzilla 799: Documentation correction for ratelimit
144 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
145 Patch provided by David Brownlee
147 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
149 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
151 NM/30 Bugzilla 888: TLS documentation bugfixes
153 NM/31 Bugzilla 896: Dovecot buffer overrun fix
155 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
156 Unlike the original bugzilla I have changed all shell scripts in src tree
158 NM/33 Bugzilla 898: Transport filter timeout fix
159 Patch by Todd Rinaldo
161 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
162 Patch by Serge Demonchaux
164 NM/35 Bugzilla 39: Base64 decode bug fixes
165 Patch by Jakob Hirsch
167 NM/36 Bugzilla 909: Correct connect() call in dcc code
169 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
171 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
173 NM/39 Bugzilla 911: Fixed MakeLinks build script
179 TK/01 Add preliminary DKIM support. Currently requires a forked version of
180 ALT-N's libdkim that I have put here:
181 http://duncanthrax.net/exim-experimental/
183 Note to Michael Haardt: I had to rename some vars in sieve.c. They
184 were called 'true' and it seems that C99 defines that as a reserved
185 keyword to be used with 'bool' variable types. That means you could
186 not include C99-style headers which use bools without triggering
187 build errors in sieve.c.
189 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
190 as mailq or other aliases. Changed the --help handling significantly
191 to do whats expected. exim_usage() emits usage/help information.
193 SC/01 Added the -bylocaldomain option to eximstats.
195 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
197 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
199 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
205 PH/01 Another patch from the Sieve maintainer.
207 PH/02 When an IPv6 address is converted to a string for single-key lookup
208 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
209 dots are used instead of colons so that keys in lsearch files need not
210 contain colons. This was done some time before quoting was made available
211 in lsearch files. However, iplsearch files do require colons in IPv6 keys
212 (notated using the quote facility) so as to distinguish them from IPv4
213 keys. This meant that lookups for IP addresses in host lists did not work
214 for iplsearch lookups.
216 This has been fixed by arranging for IPv6 addresses to be expressed with
217 colons if the lookup type is iplsearch. This is not incompatible, because
218 previously such lookups could never work.
220 The situation is now rather anomolous, since one *can* have colons in
221 ordinary lsearch keys. However, making the change in all cases is
222 incompatible and would probably break a number of configurations.
224 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
227 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
228 conversion specification without a maximum field width, thereby enabling
229 a rogue spamd server to cause a buffer overflow. While nobody in their
230 right mind would setup Exim to query an untrusted spamd server, an
231 attacker that gains access to a server running spamd could potentially
232 exploit this vulnerability to run arbitrary code as the Exim user.
234 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
235 $primary_hostname instead of what libspf2 thinks the hosts name is.
237 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
238 a directory entry by the name of the lookup key. Previously, if a
239 symlink pointed to a non-existing file or a file in a directory that
240 Exim lacked permissions to read, a lookup for a key matching that
241 symlink would fail. Now it is enough that a matching directory entry
242 exists, symlink or not. (Bugzilla 503.)
244 PH/03 The body_linecount and body_zerocount variables are now exported in the
247 PH/04 Added the $dnslist_matched variable.
249 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
250 This means they are set thereafter only if the connection becomes
253 PH/06 Added the client_condition to authenticators so that some can be skipped
254 by clients under certain conditions.
256 PH/07 The error message for a badly-placed control=no_multiline_responses left
257 "_responses" off the end of the name.
259 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
261 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
262 (without spaces) instead of just copying the configuration text.
264 PH/10 Added the /noupdate option to the ratelimit ACL condition.
266 PH/11 Added $max_received_linelength.
268 PH/12 Added +ignore_defer and +include_defer to host lists.
270 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
271 way in which PCRE > 7.0 is built.
273 PH/14 Implemented queue_only_load_latch.
275 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
276 MAIL command. The effect was to mangle the value on 64-bit systems.
278 PH/16 Another patch from the Sieve maintainer.
280 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
282 PH/18 If a system quota error occurred while trying to create the file for
283 a maildir delivery, the message "Mailbox is full" was not appended to the
284 bounce if the delivery eventually timed out. Change 4.67/27 below applied
285 only to a quota excession during the actual writing of the file.
287 PH/19 It seems that peer DN values may contain newlines (and other non-printing
288 characters?) which causes problems in log lines. The DN values are now
289 passed through string_printing() before being added to log lines.
291 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
292 and InterBase are left for another time.)
294 PH/21 Added message_body_newlines option.
296 PH/22 Guard against possible overflow in moan_check_errorcopy().
298 PH/23 POSIX allows open() to be a macro; guard against that.
300 PH/24 If the recipient of an error message contained an @ in the local part
301 (suitably quoted, of course), incorrect values were put in $domain and
302 $local_part during the evaluation of errors_copy.
308 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
309 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
312 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
313 issue a MAIL command.
315 PH/02 In an ACL statement such as
317 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
319 if a client was not listed at all, or was listed with a value other than
320 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
321 the condition was not true (as it should be), so access was not denied.
322 The bug was that the ! inversion was incorrectly passed on to the second
323 item. This has been fixed.
325 PH/03 Added additional dnslists conditions == and =& which are different from
326 = and & when the dns lookup returns more than one IP address.
328 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
329 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
331 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
332 FSYNC, which compiles an option called disable_fsync that allows for
333 bypassing fsync(). The documentation is heavily laced with warnings.
335 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
337 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
338 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
339 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
340 including adding "make clean"; (3) Added -fPIC when compiling the test
341 dynamically loaded module, to get rid of a warning.
343 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
344 message fails, move_frozen_messages = true and ignore_bounce_errors_after
345 = 0s. The bug is otherwise harmless.
347 PH/07 There was a bug in the dovecot authenticator such that the value of
348 $auth1 could be overwritten, and so not correctly preserved, after a
349 successful authentication. This usually meant that the value preserved by
350 the server_setid option was incorrect.
352 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
354 PH/09 Installed PCRE release 7.0.
356 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
357 run for batched SMTP input. It is now run at the start of every message
358 in the batch. While fixing this I discovered that the process information
359 (output by running exiwhat) was not always getting set for -bs and -bS
360 input. This is fixed, and it now also says "batched" for BSMTP.
362 PH/11 Added control=no_pipelining.
364 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
365 patch, slightly modified), and move the expansion of helo_data till after
366 the connection is made in the smtp transport (so it can use these
369 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
371 PH/14 Added log_selector = +pid.
373 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
375 PH/16 Add ${if forany and ${if forall.
377 PH/17 Added dsn_from option to vary the From: line in DSNs.
379 PH/18 Flush SMTP output before performing a callout, unless control =
380 no_callout_flush is set.
382 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
383 was true (the default) a successful delivery failed to delete the retry
384 item, thus causing premature timeout of the address. The bug is now
387 PH/20 Added hosts_avoid_pipelining to the smtp transport.
389 PH/21 Long custom messages for fakedefer and fakereject are now split up
390 into multiline reponses in the same way that messages for "deny" and
391 other ACL rejections are.
393 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
394 with slight modification.
396 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
397 draft, changing the syntax and factoring some duplicate code".
399 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
400 for deliveries of the second and subsequent messages over the same SMTP
403 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
404 ${reduce, with only minor "tidies".
406 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
408 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
409 expansion side effects.
411 PH/27 When a message times out after an over-quota error from an Exim-imposed
412 quota, the bounce message says "mailbox is full". This message was not
413 being given when it was a system quota that was exceeded. It now should
416 MH/03 Made $recipients available in local_scan(). local_scan() already has
417 better access to the recipient list through recipients_list[], but
418 $recipients can be useful in postmaster-provided expansion strings.
420 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
421 in the case of a MAIL command with additional options following the
422 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
423 were accidentally chopped off.
425 PH/29 SMTP synchronization checks are implemented when a command is read -
426 there is a check that no more input is waiting when there shouldn't be
427 any. However, for some commands, a delay in an ACL can mean that it is
428 some time before the response is written. In this time, more input might
429 arrive, invalidly. So now there are extra checks after an ACL has run for
430 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
431 pipelining has not been advertised.
433 PH/30 MH's patch to allow iscntrl() characters to be list separators.
435 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
436 returned in the SMTP response when smtp_return_error_details was false.
439 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
440 instead of the C I/O that was originally supplied, because problems were
443 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
444 Exim which did not show up earlier: it was assuming that a call to
445 SSL_CTX_set_info_callback() might give an error value. In fact, there is
446 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
447 was a macro that became an assignment, so it seemed to work. This has
448 changed to a proper function call with a void return, hence the compile
449 error. Exim's code has been fixed.
451 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
454 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
456 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
458 PH/37 If a message is not accepted after it has had an id assigned (e.g.
459 because it turns out to be too big or there is a timeout) there is no
460 "Completed" line in the log. When some messages of this type were
461 selected by exigrep, they were listed as "not completed". Others were
462 picked up by some special patterns. I have improved the selection
463 criteria to be more general.
465 PH/38 The host_find_failed option in the manualroute router can now be set
466 to "ignore", to completely ignore a host whose IP address cannot be
467 found. If all hosts are ignored, the behaviour is controlled by the new
468 host_all_ignored option.
470 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
471 homing or because of multiple MX records with /mx) generated more than
472 one IP address, and the following item turned out to be the local host,
473 all the secondary addresses of the first item were incorrectly removed
474 from the list, along with the local host and any following hosts (which
475 is what is supposed to happen).
477 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
478 whoever called Exim into the -H file. In the case of the daemon it was
479 behaving confusingly. When first started, it used values for whoever
480 started the daemon, but after a SIGHUP it used the Exim user (because it
481 calls itself on a restart). I have changed the code so that it now always
484 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
485 message are rejected with the same error (e.g. no authentication or bad
486 sender address), and a DATA command is nevertheless sent (as can happen
487 with PIPELINING or a stupid MUA), the error message that was given to the
488 RCPT commands is included in the rejection of the DATA command. This is
489 intended to be helpful for MUAs that show only the final error to their
492 PH/42 Another patch from the Sieve maintainer.
494 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
495 Eximstats - Fixed some broken HTML links and added missing column headers
497 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
498 columns for Rejects, Temp Rejects, Ham, and Spam rows.
500 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
502 PH/43 Yet another patch from the Sieve maintainer.
504 PH/44 I found a way to check for a TCP/IP connection going away before sending
505 the response to the final '.' that terminates a message, but only in the
506 case where the client has not sent further data following the '.'
507 (unfortunately, this is allowed). However, in many cases there won't be
508 any further data because there won't be any more messages to send. A call
509 to select() can be used: if it shows that the input is "ready", there is
510 either input waiting, or the socket has been closed. An attempt to read
511 the next input character can distinguish the two cases. Previously, Exim
512 would have sent an OK response which the client would never have see.
513 This could lead to message repetition. This fix should cure that, at
514 least in a lot of common cases.
516 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
517 advertised in response to EHLO.
523 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
524 fixed by 4.65/MH/01 (is this a record?) are fixed:
526 (i) An empty string was always treated as zero by the numeric comparison
527 operators. This behaviour has been restored.
529 (ii) It is documented that the numeric comparison operators always treat
530 their arguments as decimal numbers. This was broken in that numbers
531 starting with 0 were being interpreted as octal.
533 While fixing these problems I realized that there was another issue that
534 hadn't been noticed. Values of message_size_limit (both the global option
535 and the transport option) were treated as octal if they started with 0.
536 The documentation was vague. These values are now always treated as
537 decimal, and I will make that clear in the documentation.
543 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
544 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
547 MH/01 Don't check that the operands of numeric comparison operators are
548 integers when their expansion is in "skipping" mode (fixes bug
549 introduced by 4.64-PH/07).
551 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
552 child addresses, Exim now panics and dies. Previously, because the count
553 is held in a short int, deliveries were likely to be lost. As such a
554 large number of recipients for a single message is ridiculous
555 (performance will be very, very poor), I have chosen to impose a limit
556 rather than extend the field.
562 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
563 leftover -K file (the existence of which was triggered by #402).
564 While we were at it, introduced process PID as part of the -K
565 filename. This should rule out race conditions when creating
568 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
569 processing considerably. Previous code took too long for large mails,
570 triggering a timeout which in turn triggers #401.
572 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
573 in the DK code in transports.c. sendfile() is not really portable,
574 hence the _LINUX specificness.
576 TF/01 In the add_headers option to the mail command in an Exim filter,
577 there was a bug that Exim would claim a syntax error in any
578 header after the first one which had an odd number of characters
581 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
582 callout verification, Exim cached a "reject" for the entire domain. This
583 is correct for most verifications, but it is not correct for a recipient
584 verification with use_sender or use_postmaster set, because in that case
585 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
586 case of MAIL FROM:<> rejection from other early rejections (e.g.
587 rejection of HELO). When verifying a recipient using a non-null MAIL
588 address, the cache is ignored if it shows MAIL FROM:<> rejection.
589 Whatever the result of the callout, the value of the domain cache is
590 left unchanged (for any other kind of callout, getting as far as trying
591 RCPT means that the domain itself is ok).
593 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
596 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
597 manifest itself as EPIPE rather than ECONNECT. When tidying away a
598 session, the daemon ignores ECONNECT errors and logs others; it now
599 ignores EPIPE as well.
601 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
602 (quoted-printable decoding).
604 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
605 later the small subsequent patch to fix an introduced bug.
607 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
609 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
611 PH/08 An error is now given if message_size_limit is specified negative.
613 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
614 to be given (somewhat) arbitrary names.
616 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
619 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
620 miscellaneous code fixes
622 PH/10 Added the log_reject_target ACL modifier to specify where to log
625 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
626 hostname. This is wrong, because it relates to the incoming message (and
627 probably the interface on which it is arriving) and not to the outgoing
628 callout (which could be using a different interface). This has been
629 changed to use the value of the helo_data option from the smtp transport
630 instead - this is what is used when a message is actually being sent. If
631 there is no remote transport (possible with a router that sets up host
632 addresses), $smtp_active_hostname is used.
634 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
635 tweaks were necessary in order to get it to work (see also 21 below):
636 (a) The code assumed that strncpy() returns a negative number on buffer
637 overflow, which isn't the case. Replaced with Exim's string_format()
639 (b) There were several signed/unsigned issues. I just did the minimum
640 hacking in of casts. There is scope for a larger refactoring.
641 (c) The code used strcasecmp() which is not a standard C function.
642 Replaced with Exim's strcmpic() function.
643 (d) The code set only $1; it now sets $auth1 as well.
644 (e) A simple test gave the error "authentication client didn't specify
645 service in request". It would seem that Dovecot has changed its
646 interface. Fortunately there's a specification; I followed it and
647 changed what the client sends and it appears to be working now.
649 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
652 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
653 address A is aliased to B and C, where B exists and C does not. Without
654 -v the output is "A verified" because verification stops after a
655 successful redirection if more than one address is generated. However,
656 with -v the child addresses are also verified. Exim was outputting "A
657 failed to verify" and then showing the successful verification for C,
658 with its parentage. It now outputs "B failed to verify", showing B's
659 parentage before showing the successful verification of C.
661 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
662 look up a TXT record in a specific list after matching in a combined
665 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
666 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
667 they consult the DNS. I had assumed they would set it the way they
668 wanted; and indeed my experiments on Linux seem to show that in some
669 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
670 To be on the safe side, however, I have now made the interface to
671 host_find_byname() similar to host_find_bydns(), with an argument
672 containing the DNS resolver options. The host_find_byname() function now
673 sets these options at its start, just as host_find_bydns() does. The smtp
674 transport options dns_qualify_single and dns_search_parents are passed to
675 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
676 of host_find_byname() use the default settings of RES_DEFNAMES
677 (qualify_single) but not RES_DNSRCH (search_parents).
679 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
680 spool_read_header() do less string testing, by means of a preliminary
681 switch on the second character of optional "-foo" lines. (This is
682 overdue, caused by the large number of possibilities that now exist.
683 Originally there were few.) While I was there, I also converted the
684 str(n)cmp tests so they don't re-test the leading "-" and the first
685 character, in the hope this might squeeze out yet more improvement.
687 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
688 flag allowing group syntax was set by the header_syntax check but not
689 turned off, possible causing trouble later; (2) The flag was not being
690 set at all for the header_verify test, causing "group"-style headers to
691 be rejected. I have now set it in this case, and also caused header_
692 verify to ignore an empty address taken from a group. While doing this, I
693 came across some other cases where the code for allowing group syntax
694 while scanning a header line wasn't quite right (mostly, not resetting
695 the flag correctly in the right place). These bugs could have caused
696 trouble for malformed header lines. I hope it is now all correct.
698 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
699 with the "reply" argument non-NULL. The code, however (which originally
700 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
701 but it didn't always do it. This confused somebody who was copying the
702 code for some other use. I have removed all the tests.
704 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
705 feature that was used to support insecure browsers during the U.S. crypto
706 embargo. It requires special client support, and Exim is probably the
707 only MTA that supported it -- and would never use it because real RSA is
708 always available. This code has been removed, because it had the bad
709 effect of slowing Exim down by computing (never used) parameters for the
710 RSA_EXPORT functionality.
712 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
713 authenticator to fail if there's a tab character in the incoming data
714 (there should never be unless someone is messing about, as it's supposed
715 to be base64-encoded). Also added, on Timo's advice, the "secured" option
716 if the connection is using TLS or if the remote IP is the same as the
717 local IP, and the "valid-client-cert option" if a client certificate has
720 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
721 authenticators. This can be used for authorization after authentication
722 succeeds. (In the case of plaintext, it servers for both authentication
725 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
726 if any retry times were supplied.
728 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
729 connection, where there is no client IP address to check. In this
730 situation, the verify now always succeeds.
732 PH/25 Applied John Jetmore's -Mset patch.
734 PH/26 Added -bem to be like -Mset, but loading a message from a file.
736 PH/27 In a string expansion for a processed (not raw) header when multiple
737 headers of the same name were present, leading whitespace was being
738 removed from all of them, but trailing whitespace was being removed only
739 from the last one. Now trailing whitespace is removed from each header
740 before concatenation. Completely empty headers in a concatenation (as
743 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
744 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
746 PH/29 [Removed. This was a change that I later backed out, and forgot to
747 correct the ChangeLog entry (that I had efficiently created) before
748 committing the later change.]
750 PH/30 Exim was sometimes attempting to deliver messages that had suffered
751 address errors (4xx response to RCPT) over the same connection as other
752 messages routed to the same hosts. Such deliveries are always "forced",
753 so retry times are not inspected. This resulted in far too many retries
754 for the affected addresses. The effect occurred only when there were more
755 hosts than the hosts_max_try setting in the smtp transport when it had
756 the 4xx errors. Those hosts that it had tried were not added to the list
757 of hosts for which the message was waiting, so if all were tried, there
758 was no problem. Two fixes have been applied:
760 (i) If there are any address or message errors in an SMTP delivery, none
761 of the hosts (tried or untried) are now added to the list of hosts
762 for which the message is waiting, so the message should not be a
763 candidate for sending over the same connection that was used for a
764 successful delivery of some other message. This seems entirely
765 reasonable: after all the message is NOT "waiting for some host".
766 This is so "obvious" that I'm not sure why it wasn't done
767 previously. Hope I haven't missed anything, but it can't do any
768 harm, as the worst effect is to miss an optimization.
770 (ii) If, despite (i), such a delivery is accidentally attempted, the
771 routing retry time is respected, so at least it doesn't keep
772 hammering the server.
774 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
775 in ${readsocket because some servers need this prod.
777 PH/32 Added some extra debug output when updating a wait-xxx database.
779 PH/33 The hint "could be header name not terminated by colon", which has been
780 given for certain expansion errors for a long time, was not being given
781 for the ${if def:h_colon_omitted{... case.
783 PH/34 The spec says: "With one important exception, whenever a domain list is
784 being scanned, $domain contains the subject domain." There was at least
785 one case where this was not true.
787 PH/35 The error "getsockname() failed: connection reset by peer" was being
788 written to the panic log as well as the main log, but it isn't really
789 panic-worthy as it just means the connection died rather early on. I have
790 removed the panic log writing for the ECONNRESET error when getsockname()
793 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
794 runs only) independently of the message's sender address. This meant
795 that, if the 4xx error was in fact related to the sender, a different
796 message to the same recipient with a different sender could confuse
797 things. In particualar, this can happen when sending to a greylisting
798 server, but other circumstances could also provoke similar problems.
799 I have changed the default so that the retry time for these errors is now
800 based a combination of the sender and recipient addresses. This change
801 can be overridden by setting address_retry_include_sender=false in the
804 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
805 remote server are returned as part of bounce messages. This was not
806 happening for LMTP over a pipe (the lmtp transport), but now it is the
807 same for both kinds of LMTP.
809 PH/38 Despite being documented as not happening, Exim was rewriting addresses
810 in header lines that were in fact CNAMEs. This is no longer the case.
812 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
813 and queue runs started by the daemon processed all messages. This has
814 been fixed so that -R and -S can now usefully be given with -q<time>.
816 PH/40 Import PCRE release 6.7 (fixes some bugs).
818 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
820 PH/42 Give an error if -q is specified more than once.
822 PH/43 Renamed the variables $interface_address and $interface_port as
823 $received_ip_address and $received_port, to make it clear that these
824 values apply to message reception, and not to the outgoing interface when
825 a message is delivered. (The old names remain recognized, of course.)
827 PH/44 There was no timeout on the connect() call when using a Unix domain
828 socket in the ${readsocket expansion. There now is.
830 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
831 be meaningful with "accept".
833 SC/01 Eximstats V1.43
834 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
836 SC/02 Eximstats V1.44
837 Use a glob alias rather than an array ref in the generated
838 parser. This improves both readability and performance.
840 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
841 Collect SpamAssassin and rejection statistics.
842 Don't display local sender or destination tables unless
843 there is data to show.
844 Added average volumes into the top table text output.
846 SC/04 Eximstats V1.46
847 Collect data on the number of addresses (recipients)
848 as well as the number of messages.
850 SC/05 Eximstats V1.47
851 Added 'Message too big' to the list of mail rejection
852 reasons (thanks to Marco Gaiarin).
854 SC/06 Eximstats V1.48
855 Mainlog lines which have GMT offsets and are too short to
856 have a flag are now skipped.
858 SC/07 Eximstats V1.49 (Alain Williams)
859 Added the -emptyok flag.
861 SC/08 Eximstats V1.50
862 Fixes for obtaining the IP address from reject messages.
864 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
865 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
866 whitesspace changes from 4.64-PH/27
868 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
871 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
872 are found, allow negative numbers in numeric criteria)
874 JJ/06 exipick.20061117.2, added new $message_body_missing variable
876 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
877 to match changes made in 4.64-PH/43
879 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
881 PH/47 Put in an explicit test for a DNS lookup of an address record where the
882 "domain" is actually an IP address, and force a failure. This locks out
883 those revolvers/nameservers that support "A-for-A" lookups, in
884 contravention of the specifications.
886 PH/48 When a host name was looked up from an IP address, and the subsequent
887 forward lookup of the name timed out, the host name was left in
888 $sender_host_name, contrary to the specification.
890 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
891 restricted to single-key lookups, Exim was not diagnosing an error if
892 * or *@ was used with a query-style lookup.
894 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
896 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
897 long ago, but noone interested enough thought of it. Let's just say that
898 the "1.1" means that there are some new functions that weren't there at
899 some point in the past.
901 PH/51 Error processing for expansion failure of helo_data from an smtp
902 transport during callout processing was broken.
904 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
905 tested/used via the -bh/-bhc/-bs options.
907 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
908 bug, fixed in subsequent PCRE releases).
910 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
911 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
913 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
919 SC/01 Use a glob alias rather than an array ref in eximstats generated
920 parser. This improves both readability and performance.
922 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
923 Don't display local sender or destination tables in eximstats unless
924 there is data to show.
925 Added average volumes into the eximstats top table text output.
927 SC/03 Collect data on the number of addresses (recipients) as well
928 as the number of messages in eximstats.
930 TF/01 Correct an error in the documentation for the redirect router. Exim
931 does (usually) call initgroups() when daemonizing.
933 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
934 with consistent privilege compared to when running as a daemon.
936 TF/03 Note in the spec that $authenticated_id is not set for local
937 submissions from trusted users.
939 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
940 Thanks to Dean Brooks <dean@iglou.com> for the patch.
942 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
943 by adding some example configuration directives to the default
944 configuration file. A little bit of work is required to uncomment the
945 directives and define how usernames and passwords are checked, but
946 there is now a framework to start from.
948 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
949 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
950 without this. I don't know how relevant this is to other LDAP libraries.
952 PH/02 Add the verb name to the "unknown ACL verb" error.
954 PH/03 Magnus Holmgren's patch for filter_prepend_home.
956 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
958 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
959 directory not expanded when it should be if an expanded home directory
960 was set for the address (which is overridden by the transport).
962 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
965 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
966 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
967 because it is too late at that time, and has no effect.
969 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
970 security issue with \' (bugzilla #107). I could not use the
971 PQescapeStringConn() function, because it needs a PGconn value as one of
974 PH/08 When testing addresses using -bt, indicate those final addresses that
975 are duplicates that would not cause an additional delivery. At least one
976 person was confused, thinking that -bt output corresponded to deliveries.
977 (Suppressing duplicates isn't a good idea as you lose the information
978 about possibly different redirections that led to the duplicates.)
980 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
981 systems where poll() doesn't work, in particular OS X.
983 PH/10 Added more information to debugging output for retry time not reached.
985 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
986 operations in malware.c.
988 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
991 PH/13 If write_rejectlog was set false when logging was sent to syslog with
992 syslog_duplication set false, log lines that would normally be written
993 both the the main log and to the reject log were not written to syslog at
996 PH/14 In the default configuration, change the use of "message" in ACL warn
997 statements to "add_header".
999 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1000 not followed by a command (e.g. "seen endif").
1002 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1003 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1006 PH/17 Added extra conditions to the default value of delay_warning_condition
1010 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1011 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1012 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1015 The Auto-Submitted: and various List- headers are standardised, whereas I
1016 don't think Precedence: ever was.
1018 PH/18 Refactored debugging code in route_finduser() to show more information,
1019 in particular, the error code if getpwnam() issues one.
1021 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1022 This is apparently needed in addition to the PH/07 change above to avoid
1023 any possible encoding problems.
1025 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1026 but not after initializing Perl.
1028 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1029 output them only if debugging. By default they are written stderr,
1030 apparently, which is not desirable.
1032 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1035 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1038 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1040 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1041 authenticated or an ident call has been made. Suppress the default
1042 values for $authenticated_id and $authenticated_sender (but permit -oMai
1043 and -oMas) when testing with -bh.
1045 PH/24 Re-jigged the order of the tests in the default configuration so that the
1046 tests for valid domains and recipients precede the DNS black list and CSA
1047 tests, on the grounds that those ones are more expensive.
1049 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1050 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1051 This bug exists in every version of Exim that I still have, right back to
1054 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1055 However, an attempt to turn on case-sensitivity in a regex key by
1056 including (?-i) didn't work because the subject string was already
1057 lowercased, and the effects were non-intuitive. It turns out that a
1058 one-line patch can be used to allow (?-i) to work as expected.
1064 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1065 other effects) broke the use of negated acl sub-conditions.
1067 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1070 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1071 "Deny" causes Exim to reject the incoming connection with a 554 error.
1072 Unfortunately, if there is a major crisis, such as a disk failure,
1073 tcp-wrappers gives "deny", whereas what one would like would be some
1074 kind of temporary error. A kludge has been added to help with this.
1075 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1076 554 error is used if errno is still zero or contains ENOENT (which occurs
1077 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1080 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1082 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1083 errors. Otherwise a message that provokes a temporary error (when other
1084 messages do not) can cause a whole host to time out.
1086 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1087 addresses were routed directly to files or pipes from a redirect router.
1088 File deliveries just didn't batch; pipe deliveries might have suffered
1091 PH/06 A failure to get a lock for a hints database would erroneously always say
1092 "Failed to get write lock", even when it was really a read lock.
1094 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1095 of 0600. This has been changed to use the value of the lockfile_mode
1096 option (which defaults to 0600).
1098 PH/08 Applied small patch from the Sieve maintainer.
1100 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1101 folder from quota calculations, a direct delivery into this folder messed
1102 up the contents of the maildirsize file. This was because the regex was
1103 used only to exclude .Trash (or whatever) when the size of the mailbox
1104 was calculated. There was no check that a delivery was happening into an
1105 excluded directory. This bug has been fixed by ignoring all quota
1106 processing for deliveries into excluded directories.
1108 PH/10 Added the maildirfolder_create_regex option to appendfile.
1114 PH/01 The code for finding all the local interface addresses on a FreeBSD
1115 system running IPv6 was broken. This may well have applied to all BSD
1116 systems, as well as to others that have similar system calls. The broken
1117 code found IPv4 interfaces correctly, but gave incorrect values for the
1118 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1119 that it would not match correctly against @[] and not recognize the IPv6
1122 PH/02 The ipliteral router was not recognizing addresses of the form user@
1123 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1125 PH/03 Added disable_ipv6.
1127 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1128 decoded form, because it is most often used to construct To: headers
1129 lines in autoreplies, and the decoded form may well be syntactically
1130 invalid. However, $reply_address has leading white space removed, and all
1131 newlines turned into spaces so that the autoreply transport does not
1134 PH/05 If group was specified without a user on a router, and no group or user
1135 was specified on a transport, the group from the router was ignored.
1137 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1138 for visible compile-time settings that can be used to change these
1139 numbers, for those that want even more. Backwards compatibility with old
1140 spool files has been maintained. However, going back to a previous Exim
1141 release will lost any variables that are in spool files.
1143 PH/07 Two small changes when running in the test harness: increase delay when
1144 passing a TCP/IP connection to a new process, in case the original
1145 process has to generate a bounce, and remove special handling of
1146 127.0.0.2 (sic), which is no longer necessary.
1148 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1149 be the same on different OS.
1151 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1154 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1155 whether --show-vars was specified or not
1157 JJ/02 exipick: Added support for new ACL variable spool format introduced
1160 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1161 syntactically invalid From: or Reply-to: line, and a filter used this to
1162 generate an autoreply, and therefore failed to obtain an address for the
1163 autoreply, Exim could try to deliver to a non-existent relative file
1164 name, causing unrelated and misleading errors. What now happens is that
1165 it logs this as a hard delivery error, but does not attempt to create a
1168 PH/11 The exinext utility has a -C option for testing purposes, but although
1169 the given file was scanned by exinext itself; it wasn't being passed on
1170 when Exim was called.
1172 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1173 an end-of-file indication when reading a command response.
1175 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1176 compiled. In many other places in Exim, IPv6 addresses are always
1177 recognized, so I have changed this. It also means that IPv4 domain
1178 literals of the form [IPV4:n.n.n.n] are now always recognized.
1180 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1181 used if the router is not running as root, for example, when verifying at
1182 ACL time, or when using -bh. The debugging output from this situation was
1183 non-existent - all you got was a failure to exec. I have made two
1186 (a) Failures to set uid/gid, the current directory, or a process leader
1187 in a subprocess such as that created by queryprogram now generate
1188 suitable debugging ouput when -d is set.
1190 (b) The queryprogram router detects when it is not running as root,
1191 outputs suitable debugging information if -d is set, and then runs
1192 the subprocess without attempting to change uid/gid.
1194 PH/15 Minor change to Makefile for building test_host (undocumented testing
1197 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1198 additional section of a DNS packet that returns MX or SRV records.
1199 Instead, it always explicitly searches for A/AAAA records. This avoids
1200 major problems that occur when a DNS server includes only records of one
1201 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1202 fixed another bug: if SRV records were looked up and the corresponding
1203 address records were *not* found in the additional section, the port
1204 values from the SRV records were lost.
1206 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1207 using the correct key (the original address) when searching the retry
1208 rules in order to find which one to use for generating the retry hint.
1210 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1211 adding the default one. Similarly, if it contains a Reply-To: header, the
1212 errors_reply_to option, if set, is not used.
1214 PH/19 When calculating a retry time, Exim used to measure the "time since
1215 failure" by looking at the "first failed" field in the retry record. Now
1216 it does not use this if it is later than than the arrival time of the
1217 message. Instead it uses the arrival time. This makes for better
1218 behaviour in cases where some deliveries succeed, thus re-setting the
1219 "first failed" field. An example is a quota failure for a huge message
1220 when small messages continue to be delivered. Without this change, the
1221 "time since failure" will always be short, possible causing more frequent
1222 delivery attempts for the huge message than are intended.
1223 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1225 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1226 $1, $2, $3) because the numerical variables can be reset during some
1227 expansion items (e.g. "match"), thereby losing the authentication data.
1229 PH/21 Make -bV show the size of off_t variables so that the test suite can
1230 decide whether to run tests for quotas > 2G.
1232 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1233 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1234 filecount value is greater than 2G or if a quota value is greater than 2G
1235 on a system where the size of off_t is not greater than 4, a panic error
1238 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1239 never match. The debug and -bh output now contains an explicit error
1240 message indicating a malformed IPv4 address or mask.
1242 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1243 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1244 PH/23 above applies.
1246 PH/25 Do not write to syslog when running in the test harness. The only
1247 occasion when this arises is a failure to open the main or panic logs
1248 (for which there is an explicit test).
1250 PH/26 Added the /no_tell option to "control=freeze".
1252 PH/27 If a host name lookup failed very early in a connection, for example, if
1253 the IP address matched host_lookup and the reverse lookup yielded a name
1254 that did not have a forward lookup, an error message of the form "no IP
1255 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1256 could be logged. Now it outputs the IP address instead of "NULL".
1258 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1259 allows the sender and the authenticated sender to be set when
1260 submitting a message from within Exim. Since child_open_exim() is
1261 documented for local_scan(), the new function should be too.
1263 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1264 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1265 results in an empty string is now treated as unset.
1267 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1269 PH/31 Added sender_verify_fail logging option.
1271 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1272 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1273 tidied the source and removed it altogether.
1275 PH/33 When a queue run was abandoned because the load average was too high, a
1276 log line was always written; now it is written only if the queue_run log
1277 selector is set. In addition, the log line for abandonment now contains
1278 information about the queue run such as the pid. This is always present
1279 in "start" and "stop" lines but was omitted from the "abandon" line.
1281 PH/34 Omit spaces between a header name and the colon in the error message that
1282 is given when verify = headers_syntax fails (if there are lots of them,
1283 the message gets confusing).
1285 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1286 names, as there are now some PTR records that contain slashes. This check
1287 is only to protect against broken name servers that fall over on strange
1288 characters, so the fact that it applies to all lookups doesn't matter.
1290 PH/36 Now that the new test suite is complete, we can remove some of the
1291 special code in Exim that was needed for the old test suite. For example,
1292 sorting DNS records because real resolvers return them in an arbitrary
1293 order. The new test suite's fake resolver always returns records in the
1296 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1297 bounces) except when queue_only is set, to avoid logging races between
1298 the different processes.
1300 PH/38 Panic-die if .include specifies a non-absolute path.
1302 PH/39 A tweak to the "H" retry rule from its user.
1304 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1305 a label. They prevented compilation on older perls.
1307 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1308 a warning to be raised on newish perls.
1310 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1311 on queue. Changes to match documented behaviour of showing count of
1312 messages matching specified criteria.
1314 PH/40 Changed the default ident timeout from 30s to 5s.
1316 PH/41 Added support for the use of login_cap features, on those BSD systems
1317 that have them, for controlling the resources used by pipe deliveries.
1319 PH/42 The content-scanning code uses fopen() to create files in which to put
1320 message data. Previously it was not paying any attention to the mode of
1321 the files. Exim runs with umask(0) because the rest of the code creates
1322 files with open(), and sets the required mode explicitly. Thus, these
1323 files were ending up world-writeable. This was not a big issue, because,
1324 being within the spool directory, they were not world-accessible. I have
1325 created a function called modefopen, which takes an additional mode
1326 argument. It sets umask(777), creates the file, chmods it to the required
1327 mode, then resets the umask. All the relevant calls to fopen() in the
1328 content scanning code have been changed to use this function.
1330 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1331 to 24 hours. This avoids potential overflow problems when processing G
1332 and H retry rules. I suspect nobody ever tinkers with this value.
1334 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1336 PH/45 When the plaintext authenticator is running as a client, the server's
1337 challenges are checked to ensure they are valid base64 strings. By
1338 default, the authentication attempt is cancelled if an invalid string is
1339 received. Setting client_ignore_invalid_base64 true ignores these errors.
1340 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1341 they are received. Thus, the responses can be made to depend on the
1342 challenges. If an invalid string is ignored, an empty string is placed in
1345 PH/46 Messages that are created by the autoreply transport now contains a
1346 References: header, in accordance with RFCs 2822 and 3834.
1348 PH/47 Added authenticated_sender_force to the smtp transport.
1350 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1352 PH/49 Installed latest patch from the Sieve maintainer.
1354 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1355 was also set, the appendfile transport was unnecessarily scanning a
1356 directory of message files (e.g. for maildir delivery) to find the count
1357 of files (along with the size), even though it did not need this
1358 information. It now does the scan only if it needs to find either the
1359 size of the count of files.
1361 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1363 PH/52 Two bugs concerned with error handling when the smtp transport is
1366 (i) Exim was not creating retry information for temporary errors given
1367 for individual recipients after the DATA command when the smtp transport
1368 was used in LMTP mode. This meant that they could be retried too
1369 frequently, and not timed out correctly.
1371 (ii) Exim was setting the flag that allows error details to be returned
1372 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1373 recipients that were returned after the DATA command.
1375 PH/53 This is related to PH/52, but is more general: for any failing address,
1376 when detailed error information was permitted to be returned to the
1377 sender, but the error was temporary, then after the final timeout, only
1378 "retry timeout exceeded" was returned. Now it returns the full error as
1379 well as "retry timeout exceeded".
1381 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1382 do this, and (what is worse) MTAs that accept it.
1384 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1385 will now be deprecated.
1387 PH/56 New os.c-cygwin from the Cygwin maintainer.
1389 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1390 formats (previously only available in exim formats via -bpr, -bpru,
1391 and -bpra. Now also available in native and exiqgrep formats)
1393 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1394 with very large, slow to parse queues
1396 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1398 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1400 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1401 responses to authentication challenges, though it was showing the
1402 challenges; (ii) I've removed the CR characters from the debug output for
1405 PH/58 Allow for the insertion of a newline as well as a space when a string
1406 is turned into more than one encoded-word during RFC 2047 encoding. The
1407 Sieve code now uses this.
1409 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1410 data_4xx, lost_connection, tls_required.
1412 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1413 message was being sent as an SMTP response.
1415 PH/61 Add -l and -k options to exicyclog.
1417 PH/62 When verifying, if an address was redirected to one new address, so that
1418 verification continued, and the new address failed or deferred after
1419 having set something in $address_data, the value of $address_data was not
1420 passed back to the ACL. This was different to the case when no
1421 redirection occurred. The value is now passed back in both cases.
1423 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1424 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1425 use login_cap.h, so on its own it isn't the distinguishing feature. The
1426 new name refers directly to the setclassresources() function.
1428 PH/65 Added configuration files for NetBSD3.
1430 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1432 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1433 is preferred over IPv4.
1435 PH/68 The bounce_return_message and bounce_return_body options were not being
1436 honoured for bounces generated during the reception of non-SMTP messages.
1437 In particular, this applied to messages rejected by the ACL. This bug has
1438 been fixed. However, if bounce_return_message is true and bounce_return_
1439 body is false, the headers that are returned for a non-SMTP message
1440 include only those that have been read before the error was detected.
1441 (In the case of an ACL rejection, they have all been read.)
1443 PH/69 The HTML version of the specification is now built in a directory called
1444 spec_html instead of spec.html, because the latter looks like a path with
1445 a MIME-type, and this confuses some software.
1447 PH/70 Catch two compiler warnings in sieve.c.
1449 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1450 function verify_get_ident() calls ip_connect() to connect a socket, but
1451 if the "connect()" function timed out, ip_connect() used to close the
1452 socket. However, verify_get_ident() also closes the socket later, and in
1453 between Exim writes to the log, which may get opened at this point. When
1454 the socket was closed in ip_connect(), the log could get the same file
1455 descriptor number as the socket. This naturally causes chaos. The fix is
1456 not to close the socket in ip_connect(); the socket should be closed by
1457 the function that creates it. There was only one place in the code where
1458 this was missing, in the iplookup router, which I don't think anybody now
1459 uses, but I've fixed it anyway.
1461 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1462 well as to direct DNS lookups. Otherwise the handling of names in host
1463 lists is inconsistent and therefore confusing.
1469 PH/01 Two changes to the default runtime configuration:
1471 (1) Move the checks for relay_from_hosts and authenticated clients from
1472 after to before the (commented out) DNS black list checks.
1474 (2) Add control=submission to the relay_from_hosts and authenticated
1475 clients checks, on the grounds that messages accepted by these
1476 statements are most likely to be submissions.
1478 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1480 (1) Generate an error if the third argument for the ${prvs expansion is
1483 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1486 (3) Reset the variables that are obtained from the first argument of
1487 ${prvscheck and used in the second argument before leaving the code,
1488 because their memory is reclaimed, so using them afterwards may do
1491 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1492 one (it's much easier than Tom thought :-).
1494 (5) Because of (4), we can now allow for the use of $prvscheck_result
1495 inside the third argument.
1497 PH/03 For some reason, the default setting of PATH when running a command from
1498 a pipe transport was just "/usr/bin". I have changed it to
1501 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1502 anything to be listed in the output from -bV.
1504 PH/05 When a filter generated an autoreply, the entire To: header line was
1505 quoted in the delivery log line, like this:
1507 => >A.N.Other <ano@some.domain> <original@ddress> ...
1509 This has been changed so that it extracts the operative address. There
1510 may be more than one such address. If so, they are comma-separated, like
1513 => >ano@some.domain,ona@other.domain <original@ddress> ...
1515 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1516 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1517 not being looked up in the rDNS to get a host name, Exim was showing the
1518 IP address twice in Received: lines, even though the IP addresses were
1519 identical. For example:
1521 Received: from [1.2.3.4] (helo=[1.2.3.4])
1523 However, if the real host name was known, it was omitting the HELO data
1524 if it matched the actual IP address. This has been tidied up so that it
1525 doesn't show the same IP address twice.
1527 PH/07 When both +timestamp and +memory debugging was on, the value given by
1528 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1529 called by the debug printing, thereby overwriting the timestamp buffer.
1530 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1532 PH/08 When the original message was included in an autoreply transport, it
1533 always said "this is a copy of the message, including all the headers",
1534 even if body_only or headers_only was set. It now gives an appropriate
1537 PH/09 Applied a patch from the Sieve maintainer which:
1539 o fixes some comments
1540 o adds the (disabled) notify extension core
1541 o adds some debug output for the result of if/elsif tests
1542 o points to the current vacation draft in the documentation
1543 and documents the missing references header update
1547 o fixes a bug in processing the envelope test (when testing
1548 multiple envelope elements, the last element determinted the
1551 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1552 Electronic Mail") by including:
1554 Auto-submitted: auto-generated
1556 in the messages that it generates (bounce messages and others, such as
1557 warnings). In the case of bounce messages for non-SMTP mesages, there was
1558 also a typo: it was using "Auto_submitted" (underscore instead of
1559 hyphen). Since every message generated by Exim is necessarily in response
1560 to another message, thes have all been changed to:
1562 Auto-Submitted: auto-replied
1564 in accordance with these statements in the RFC:
1566 The auto-replied keyword:
1568 - SHOULD be used on messages sent in direct response to another
1569 message by an automatic process,
1571 - MUST NOT be used on manually-generated messages,
1573 - MAY be used on Delivery Status Notifications (DSNs) and Message
1574 Disposition Notifications (MDNs),
1576 - MUST NOT be used on messages generated by automatic or periodic
1577 processes, except for messages which are automatic responses to
1580 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1581 to the default Received: header definition.
1583 PH/12 Added log selector acl_warn_skipped (default on).
1585 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1586 variables because (a) they are in the wrong storage pool and (b) even if
1587 they were copied, it wouldn't work properly because of the caching.
1589 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1590 checking when decoding. Apparently there are clients that generate
1591 overlong encoded strings. Why am I not surprised?
1593 PH/15 If the first argument of "${if match_address" was not empty, but did not
1594 contain an "@" character, Exim crashed. Now it writes a panic log message
1595 and treats the condition as false.
1597 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1599 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1600 extension "envelope-auth". The code is finished and in agreement with
1601 other implementations, but there is no documentation so far and in fact,
1602 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1603 not changing the active code.
1605 Print executed "if" and "elsif" statements when debugging is used. This
1606 helps a great deal to understand what a filter does.
1608 Document more things not specified clearly in RFC3028. I had all this
1609 sorted out, when out of a sudden new issues came to my mind. Oops."
1611 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1614 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1615 canonical form (as documented). However, after a host name lookup from
1616 the IP address, check_host() was doing a simple string comparison with
1617 addresses acquired from the DNS when checking that the found name did
1618 have the original IP as one of its addresses. Since any found IPv6
1619 addresses are likely to be in abbreviated form, the comparison could
1620 fail. Luckily, there already exists a function for doing the comparison
1621 by converting both addresses to binary, so now that is used instead of
1622 the text comparison.
1624 PH/20 There was another similar case to PH/19, when a complete host name was
1625 given in a host list; looking up its IP address could give an abbreviated
1626 form, whereas the current host's name might or might not be abbreviated.
1627 The same fix has been applied.
1633 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1634 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1637 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1638 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1640 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1642 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1643 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1644 Also, for "Auto-Submitted", treat anything other than "no" as
1645 non-personal, in accordance with RFC 3834. (Previously it treated
1646 anything starting "auto-" as non-personal.)
1648 TF/01 The control=submission/name=... option had a problem with syntax
1649 errors if the name included a slash character. The /name= option
1650 now slurps the rest of the string, so it can include any characters
1651 but it must come last in the list of options (after /sender_retain
1654 PH/05 Some modifications to the interface to the fake nameserver for the new
1662 TK/01 Added the "success_on_redirect" address verification option. See
1663 NewStuff for rationale and an example.
1665 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1667 PH/02 Patch to exigrep to allow it to work on syslog lines.
1669 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1670 fread() to skip over the body file's header line, because in Cygwin the
1671 header line is locked and is inaccessible.
1673 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1674 co-exist for some time) to make it clear that it is the Exim ID that is
1675 referenced, not the Message-ID: header line.
1677 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1678 string_format() function, because snprintf() does not exist on all
1681 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1682 ${stat: expansion item.
1684 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1685 protocol synchronization error", to keep the pedants happy.
1687 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1688 well as for IRIX systems, when gcc is being used. See the host.c source
1691 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1693 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1696 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1697 transport and to the smtp transport in LMTP mode.
1699 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1701 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1702 run a filter in a subprocess. This could lead to confusion in subsequent
1703 lookups in the parent process. There should also be a search_tidyup() at
1704 the end of the subprocess.
1706 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1707 only if the host matched helo_try_verify_hosts, which caused the
1708 verification to occur when the EHLO/HELO command was issued. The ACL just
1709 tested the remembered result. Now, if a previous verification attempt has
1710 not happened, "verify = helo" does it there and then.
1712 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1714 TK/03 Fix log output including CR from clamd.
1716 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1717 exist provoked a memory error which could cause a segfault.
1719 PH/15 Installed PCRE 6.2
1721 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1723 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1724 of the problem. Specifically, suggested +O2 rather than +O1 for the
1727 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1729 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1730 record, the port was not correctly logged when the outgoing_port log
1731 selector was set (it logged the transort's default port).
1733 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1734 fallback_hosts, and "hosts" in the smtp transport.
1736 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1737 host errors such as "Connection refused".
1739 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1740 authentication with radiusclient 0.4.9:
1742 - Error returned from rc_read_config was caught wrongly
1743 - Username/password not passed on to radius server due to wrong length.
1745 The presumption is that some radiusclient API changes for 4.51/PH/17
1746 were not taken care of correctly. The code is still untested by me (my
1747 Linux distribution still has 0.3.2 of radiusclient), but it was
1748 contributed by a Radius user.
1750 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1751 expanding the "port" option of the smtp transport.
1753 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1754 while reading a MIME header. Thanks to Tom Hughes for a patch.
1756 PH/24 Include config.h inside local_scan.h so that configuration settings are
1759 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1760 that in an ACL for RCPT (for example), you can examine exactly what was
1763 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1764 commands, but it was not correctly comparing the address with the actual
1765 client host address. Thus, it would show the EHLO address in Received:
1766 header lines when this was not necessary.
1768 PH/27 Added the % operator to ${eval:}.
1770 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1771 it should be ignoring failures (because with -C, for example, it has lost
1772 privilege). It wasn't ignoring creation failures other than "already
1775 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1778 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1779 because an input line was too long, either on its own, or by virtue of
1780 too many continuations, the temporary file was not being removed, and the
1781 return code was incorrect.
1783 PH/31 Missing "BOOL" in function definition in filtertest.c.
1785 PH/32 Applied Sieve patches from the maintainer.
1787 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1789 PH/33 Added "verify = not_blind".
1791 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1792 Local/Makefile (with some defaults set). These are used in built scripts
1793 such as exicyclog, but they have never been used in the exim_install
1794 script (though there are many overriding facilities there). I have
1795 arranged that the exim_install script now takes note of these two
1798 PH/35 Installed configuration files for Dragonfly.
1800 PH/36 When a locally submitted message by a trusted user did not contain a
1801 From: header, and the sender address was obtained from -f or from an SMTP
1802 MAIL command, and the trusted user did not use -F to supply a sender
1803 name, $originator_name was incorrectly used when constructing a From:
1804 header. Furthermore, $originator_name was used for submission mode
1805 messages from external hosts without From: headers in a similar way,
1806 which is clearly wrong.
1808 PH/37 Added control=suppress_local_fixups.
1810 PH/38 When log_selector = +received_sender was set, and the addition of the
1811 sender made the log line's construction buffer exactly full, or one byte
1812 less than full, an overflow happened when the terminating "\n" was
1815 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1816 when the result of a list match is failure because a DNS lookup failed.
1818 PH/40 RM_COMMAND is now used in the building process.
1820 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1821 the "build-* directories that it finds.
1823 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1824 address in a domain literal was a prefix of an interface address.
1826 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1827 when verifying a sender address, unless rewrite_headers is false.
1829 PH/44 Wrote a long comment about why errors_to addresses are verified as
1830 recipients, not senders.
1832 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1833 the ratelimit ACL was added.
1835 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1837 PH/46 Added extra information about PostgreSQL errors to the error string.
1839 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1840 avoiding the need to install special zones in a real server. This is
1841 backwards compatible; if it can't find the fake resolver, it drops back.
1842 Thus, both old and new test suites can be run.
1844 TF/02 Added util/ratelimit.pl
1846 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1847 clock is set back in time.
1849 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1850 Candler <B.Candler@pobox.com>.
1852 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1853 OK for addresses that are the result of redirections.
1855 PH/48 A number of further additions for the benefit of the new test suite,
1856 including a fake gethostbyname() that interfaces to the fake DNS resolver
1859 TF/06 The fix for widen_domains has also been applied to qualify_single and
1860 search_parents which are the other dnslookup options that can cause
1863 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1866 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1868 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1869 service" if it encountered an MX record with an empty target hostname.
1870 The message is now "an MX or SRV record indicated no SMTP service".
1872 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1873 if the DNS of the sending site is misconfigured. This is quite a
1874 common situation. This change restores the behaviour of treating a
1875 helo verification defer as a failure.
1877 PH/51 If self=fail was set on a router, the bounce message did not include the
1878 actual error message.
1884 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1886 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1887 command itself ended in error, the underlying message about the transport
1888 filter timeout was being overwritten with the pipe command error. Now the
1889 underlying error message should be appended to the second error message.
1891 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1893 PH/02 Reduce the amount of output that "make" produces by default. Full output
1894 can still be requested.
1896 PH/03 The warning log line about a condition test deferring for a "warn" verb
1897 was being output only once per connection, rather than after each
1898 occurrence (because it was using the same function as for successful
1899 "warn" verbs). This seems wrong, so I have changed it.
1901 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1902 it should not have, which might have caused a crash in the right
1903 circumstances, but probably never did.
1905 PH/04 Installed a modified version of Tony Finch's patch to make submission
1906 mode fix the return path as well as the Sender: header line, and to
1907 add a /name= option so that you can make the user's friendly name appear
1910 TF/03 Added the control = fakedefer ACL modifier.
1912 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1913 Mark Lowes for thorough testing.
1915 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1917 TK/03 Merged latest SRS patch from Miles Wilton.
1919 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1920 with the definition in sysexits.h (which is #included earlier).
1921 Fortunately, Exim does not actually use EX_OK. The code used to try to
1922 preserve the sysexits.h value, by assumimg that macro definitions were
1923 scanned for macro replacements. I have been disabused of this notion,
1924 so now the code just undefines EX_OK before #including unistd.h.
1926 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1927 in the smtp transport. When a block could not be written in a single
1928 write() function, the timeout was being re-applied to each part-write.
1929 This seems wrong - if the receiver was accepting one byte at a time it
1930 would take for ever. The timeout is now adjusted when this happens. It
1931 doesn't have to be particularly precise.
1933 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1934 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1936 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1937 without a domain if the check to <postmaster@domain> fails.
1939 SC/01 Eximstats: added -xls and the ability to specify output files
1940 (patch written by Frank Heydlauf).
1942 SC/02 Eximstats: use FileHandles for outputing results.
1944 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1946 SC/04 Eximstats: fixed display of large numbers with -nvr option
1948 SC/05 Eximstats: fixed merging of reports with empty tables.
1950 SC/06 Eximstats: added the -include_original_destination flag
1952 SC/07 Eximstats: removed tabs and trailing whitespace.
1954 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1956 TK/06 MBOX spool code: Add real "From " MBOX separator line
1957 so the .eml file is really in mbox format (even though
1958 most programs do not really care). Patch from Alex Miller.
1960 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1961 The latter is generated from $received_to and is only set if the
1962 message has one envelope recipient. SA can use these headers,
1963 obviously out-of-the-box. Patch from Alex Miller.
1965 PH/08 The ${def test on a variable was returning false if the variable's
1966 value was "0", contrary to what the specification has always said!
1967 The result should be true unless the variable is empty.
1969 PH/09 The syntax error of a character other than { following "${if
1970 def:variable_name" (after optional whitespace) was not being diagnosed.
1971 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1972 accidental colon was present, for example, could give incorrect results.
1974 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1975 result is used (not including appendfile, where other changes are about
1978 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1979 This involved changing a lot of size variables from int to off_t. It
1980 should work with maildirs and everything.
1982 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1983 spamd dying while we are connected to it.
1985 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1988 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1989 function for BDB 4.3.
1991 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1993 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1994 the sources for PCRE have been re-arranged and more files are now
1997 PH/15 The code I had for printing potentially long long variables in PH/11
1998 above was not the best (it lost precision). The length of off_t variables
1999 is now inspected at build time, and an appropriate printing format (%ld
2000 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2001 to be "long long int" or "long int". This is needed for the internal
2002 formatting function string_vformat().
2004 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2005 the configuration file to be ":syslog", then the script "guesses" where
2006 the logs files are, rather than using the compiled in default. In our
2007 case the guess is not the same as the compiled default, so the script
2008 suddenly stopped working when I started to use syslog. The patch checks
2009 to see if log_file_path is "". If so, it attempts to read it from exim
2010 with no configuration file to get the compiled in version, before it
2011 falls back to the previous guessing code."
2013 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2014 implementing BATV in an Exim configuration. See NewStuff for the gory
2017 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2018 Makefile that are specific to HP-UX.
2020 PH/18 If the "use_postmaster" option was set for a recipient callout together
2021 with the "random" option, the postmaster address was used as the MAIL
2022 FROM address for the random test, but not for the subsequent recipient
2023 test. It is now used for both.
2025 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2026 patch removes a few documentation additions to RFC 3028, because the
2027 latest draft now contains them. It adds the new en;ascii-case comparator
2028 and a new error check for 8bit text in MIME parts. Comparator and
2029 require names are now matched exactly. I enabled the subaddress
2030 extension, but it is not well tested yet (read: it works for me)."
2032 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2033 rework some of the code of TK/09 above to avoid the hardwired use of
2034 "%lld" and "long long". Replaced the call to snprintf() with a call to
2037 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2038 records point to non-existent hosts", "retry timeout exceeded", and
2039 "retry time not reached for any host after a long failure period".
2041 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2042 experimental DomainKeys support:
2044 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2045 (2) On an error such as an illegally used "control", the wrong name for
2046 the control was given.
2048 These problems did NOT occur unless DomainKeys support was compiled.
2050 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2052 PH/24 Added ${if match_ip condition.
2054 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2055 databases so that it will be absolutely obvious if a crash occurs in the
2056 DB library. This is a regular occurrence (often caused by mis-matched
2059 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2060 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2061 picked up on a user's system that detects such things. There doesn't seem
2062 to be a gcc warning option for this - only an attribute that has to be
2063 put on the function's prototype. It seems that in Fedora Core 4 they have
2064 set this on a number of new functions. No doubt there will be more in due
2067 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2068 specify a transport. However, if an address that was verified by such a
2069 router was the subject of a callout, Exim crashed because it tried to
2070 read the rcpt_include_affixes from the non-existent transport. Now it
2071 just assumes that the setting of that option is false. This bug was
2072 introduced by 4.51/PH/31.
2074 PH/28 Changed -d+all to exclude +memory, because that information is very
2075 rarely of interest, but it makes the output a lot bigger. People tend to
2076 do -d+all out of habit.
2078 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2079 code in os-type was giving problems when libc.so lives in lib64, like on
2082 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2083 aren't the modern standard, and it seems that some systems' include files
2084 don't always have them. Exim was already checking for some of the newer
2085 ones like T_AAAA, and defining it itself. I've added checks for all the
2086 record types that Exim uses.
2088 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2089 not automatically generating a new one, as it is supposed to. This
2090 prevented TLS from working. If the file did exist, but contained invalid
2091 data, a new version was generated, as expected. It was only the case of a
2092 non-existent file that was broken.
2094 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2095 with a change in libdomainkeys > 0.64.
2097 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2098 from DNS. If the selector record carries the flag, it now has
2099 precedence over the domain-wide flag.
2101 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2103 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2104 the use of a port name that isn't defined in /etc/services) occurred, the
2105 message was deferred as in a normal delivery, and thus remained on the
2106 spool, instead of being failed because of the mua_wrapper setting. This
2107 is now fixed, and I tidied up some of the mua_wrapper messages at the
2110 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2111 the messages in a hash of arrays rather than using individual hashes.
2112 This is a bit cleaner and results in dramatic memory savings, albeit
2113 at a slight CPU cost.
2115 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2116 as requested by Marc Sherman.
2118 SC/10 Eximstats: added histograms for user specified patterns as requested
2121 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2123 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2124 fopen() in the content-scanning modules that did not already have it.
2130 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2131 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2133 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2135 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2137 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2138 to test Sieve filters that use "vacation".
2140 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2141 that changes the way the GnuTLS parameters are stored in the cache file.
2142 The new format can be generated externally. For backward compatibility,
2143 if the data in the cache doesn't make sense, Exim assumes it has read an
2144 old-format file, and it generates new data and writes a new file. This
2145 means that you can't go back to an older release without removing the
2148 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2149 work if there are any delivery delays because "one_time" forces the
2150 parent to be marked "delivered", so its unseen clone is never tried
2151 again. For this reason, Exim now forbids the simultaneous setting of
2154 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2155 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2156 entry if you want to know the details. The fix, however, neglected to
2157 consider the case when local delivery batching is involved. The test for
2158 "previously delivered" was not happening when checking to see if an
2159 address could be batched with a previous (undelivered) one; under
2160 certain circumstances this could lead to multiple deliveries to the same
2163 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2164 in its include files, and this causes problems building Exim.
2166 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2167 header_syntax) but Exim was just ignoring anything given after a slash.
2168 In particular, this caused confusion with an attempt to use "verify =
2169 reverse_host_lookup/defer_ok". An error is now given when options are
2170 supplied for verify items that do not have them. (Maybe reverse_host_
2171 lookup should have a defer_ok option, but that's a different point.)
2173 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2174 defined by RFC 821) to 2048, because there were problems with some AUTH
2175 commands, and RFC 1869 says the size should be increased for extended
2176 SMTP commands that take arguments.
2178 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2181 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2182 "unknown" error; now it says that the functionality isn't in the binary.
2184 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2185 an address' error message when a string expansion fails (syntax or
2186 whatever). Otherwise the password may appear in the log. Following change
2187 PH/42 below, there is no longer a chance of it appearing in a bounce
2190 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2192 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2193 of its addresses was ever tried. (Bugzilla bug #2.)
2195 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2196 the result incorrectly in the debug output. (It correctly added a newline
2197 to what was transported.)
2199 TF/01 Added $received_time.
2201 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2202 commented out examples of how to interface to a virus scanner and to
2203 SpamAssassin. Also added commented examples of av_scanner and
2204 spamd_address settings.
2206 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2207 and controls are allowed in which ACLs. There were a couple of minor
2208 errors. Some of the entries in the conditions table (which is a table of
2209 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2210 negation of where the condition IS allowed.
2212 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2214 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2215 header file does not have a version number, so I've had to invent a new
2216 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2217 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2218 radiusclient), but it was contributed by a Radius user.
2220 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2221 files or directories, for OpenSSL.
2223 PH/19 When an Exim process that is running as root has to create an Exim log
2224 file, it does so in a subprocess that runs as exim:exim so as to get the
2225 ownership right at creation (otherwise, other Exim processes might see
2226 the file with the wrong ownership). There was no test for failure of this
2227 fork() call, which would lead to the process getting stuck as it waited
2228 for a non-existent subprocess. Forks do occasionally fail when resources
2229 run out. I reviewed all the other calls to fork(); they all seem to check
2232 PH/20 When checking for unexpected SMTP input at connect time (before writing
2233 the banner), Exim was not dealing correctly with a non-positive return
2234 from the read() function. If the client had disconnected by this time,
2235 the result was a log entry for a synchronization error with an empty
2236 string after "input=" when read() returned zero. If read() returned -1
2237 (an event I could not check), uninitialized data bytes were printed.
2238 There were reports of junk text (parts of files, etc) appearing after
2241 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2243 PH/22 Added support for macro redefinition, and (re)definition in between
2244 driver and ACL definitions.
2246 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2247 forgetting to use the resulting value; it was using the unexpanded value.
2249 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2250 hadn't been configured. The fix is from Juergen Kreileder, who
2251 understands it better than I do:
2253 "Here's what I see happening with three configured cyrus_sasl
2254 authenticators configured (plain, login, cram-md5):
2256 On startup auth_cyrus_sasl_init() gets called for each of these.
2257 This means three calls to sasl_listmech() without a specified mech_list.
2258 => SASL tests which mechs of all available mechs actually work
2259 => three warnings about OTP not working
2260 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2262 With the patch, sasl_listmech() also gets called three times. But now
2263 SASL's mech_list option is set to the server_mech specified in the the
2264 authenticator. Or in other words, the answer from sasl_listmech()
2265 gets limited to just the mech you're testing for (which is different
2267 => the return list contains just 'plain' or 'login', 'cram-md5' or
2268 nothing depending on the value of ob->server_mech.
2270 I've just tested the patch: Authentication still works fine,
2271 unavailable mechs specified in the exim configuration are still
2272 caught, and the auth.log warnings about OTP are gone."
2274 PH/25 When debugging is enabled, the contents of the command line are added
2275 to the debugging output, even when log_selector=+arguments is not
2278 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2279 answer is "GNU", and only if the return is "GNU/something" is the answer
2282 PH/27 $acl_verify_message is now set immediately after the failure of a
2283 verification in an ACL, and so is available in subsequent modifiers. In
2284 particular, the message can be preserved by coding like this:
2286 warn !verify = sender
2287 set acl_m0 = $acl_verify_message
2289 Previously, $acl_verify_message was set only while expanding "message"
2290 and "log_message" when a very denied access.
2292 PH/28 Modified OS/os.c-Linux with
2294 -#ifndef OS_LOAD_AVERAGE
2295 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2297 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2298 nomenclature these days.)
2300 PH/29 Installed patch from the Sieve maintainer that adds the options
2301 sieve_useraddress and sieve_subaddress to the redirect router.
2303 PH/30 In these circumstances:
2304 . Two addresses routed to the same list of hosts;
2305 . First host does not offer TLS;
2306 . First host accepts first address;
2307 . First host gives temporary error to second address;
2308 . Second host offers TLS and a TLS session is established;
2309 . Second host accepts second address.
2310 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2311 and peerdn, if requested) that were in fact used only for the second
2314 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2315 attention to any local part prefix or suffix that was matched by the
2316 router that accepted the address. It now behaves in the same way as it
2317 does for delivery: the affixes are removed from the local part unless
2318 rcpt_include_affixes is set on the transport.
2320 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2321 timeout during the DATA phase of an incoming message.
2323 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2324 applied a patch sanctioned by the Sieve maintainer.
2326 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2327 the uid or gid is negative. A case of a negative gid caused this to be
2328 noticed. The fix allows for either to be negative.
2330 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2331 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2334 PH/36 The change PH/12 above was broken. Fixed it.
2336 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2337 the grounds that routing the same address twice would always produce the
2338 same answer. This might have been true once, but it is certainly no
2339 longer true now. Routing a child address may depend on the previous
2340 routing that produced that child. Some complicated redirection strategies
2341 went wrong when messages had multiple recipients, and made Exim's
2342 behaviour dependent on the order in which the addresses were given.
2344 I have moved the duplicate checking until after the routing is complete.
2345 Exim scans the addresses that are assigned to local and remote
2346 transports, and removes any duplicates. This means that more work will be
2347 done, as duplicates will always all be routed, but duplicates are
2348 presumably rare, so I don't expect this is of any significance.
2350 For deliveries to pipes, files, and autoreplies, the duplicate checking
2351 still happens during the routing process, since they are not going to be
2354 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2355 It corrects a timeout issue with spamd. This is Ian's comment: "The
2356 background is that sometimes spamd either never reads data from a
2357 connection it has accepted, or it never writes response data. The exiscan
2358 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2359 blindly assumes that writes won't block so it may never time out."
2361 PH/39 Allow G after quota size as well as K and M.
2363 PH/40 The value set for $authenticated_id in an authenticator may not contain
2364 binary zeroes or newlines because the value is written to log lines and
2365 to spool files. There was no check on this. Now the value is run through
2366 the string_printing() function so that such characters are converted to
2367 printable escape sequences.
2369 PH/41 $message_linecount is a new variable that contains the total number of
2370 lines in the message. Compare $body_linecount, which is the count for the
2373 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2374 bounce and delay warning messages, except in certain special cases, which
2377 (a) An SMTP error message from a remote host;
2378 (b) A message specified in a :fail: redirection;
2379 (c) A message specified in a "fail" command in a system filter;
2380 (d) A message specified in a FAIL return from the queryprogram router;
2381 (e) A message specified by the cannot_route_message router option.
2383 In these cases only, Exim does include the error details in bounce and
2384 warning messages. There are also a few cases where bland messages such
2385 as "unrouteable address" or "local delivery error" are given.
2387 PH/43 $value is now also set for the "else" part of a ${run expansion.
2389 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2390 being worked on, but at least Exim now implements the latest version to
2393 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2394 process to complete was treated as a delivery failure, a timeout while
2395 writing the message to the pipe was logged, but erroneously treated as a
2396 successful delivery. Such timeouts include transport filter timeouts. For
2397 consistency with the overall process timeout, these timeouts are now
2398 treated as errors, giving rise to delivery failures by default. However,
2399 there is now a new Boolean option for the pipe transport called
2400 timeout_defer, which, if set TRUE, converts the failures into defers for
2401 both kinds of timeout. A transport filter timeout is now identified in
2404 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2405 systems where "make" and "gmake" are different, calling "gmake" at top
2406 level broke things. I've arranged for the value of $(MAKE) to be passed
2407 from the Makefile to this script so that it can call the same version of
2411 A note about Exim versions 4.44 and 4.50
2412 ----------------------------------------
2414 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2415 changes of various kinds. As a consequence, a big documentation update was
2416 needed. This delayed the release for rather longer than seemed good, especially
2417 in the light of a couple of (minor) security issues. Therefore, the changes
2418 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2419 release. So 4.44 and 4.50 are in effect two different branches that both start
2422 I have left the 4.50 change log unchanged; it contains all the changes since
2423 4.43. The change log for 4.44 is below; many of its items are identical to
2424 those for 4.50. This seems to be the most sensible way to preserve the
2425 historical information.
2431 1. Minor wording change to the doc/README.SIEVE file.
2433 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2434 computation of the current number of files was incorrect.
2436 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2437 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2440 4. Give more explanation in the error message when the command for a transport
2441 filter fails to execute.
2443 5. There are several places where Exim runs a non-Exim command in a
2444 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2445 was being done only for the command run by the queryprogram router. It is
2446 now done for all such subprocesses. The other cases are: ${run, transport
2447 filters, and the commands run by the lmtp and pipe transports.
2449 6. Added CONFIGURE_GROUP build-time option.
2451 7. Some older OS have a limit of 256 on the maximum number of file
2452 descriptors. Exim was using setrlimit() to set 1000 as a large value
2453 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2454 systems. I've change it so that if it can't get 1000, it tries for 256.
2456 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2457 was an oversight, and furthermore, ever since the addition of extra
2458 controls (e.g. 4.43/32), the checks on when to allow different forms of
2459 "control" were broken. There should now be diagnostics for all cases when a
2460 control that does not make sense is encountered.
2462 9. Added the /retain_sender option to "control=submission".
2464 10. $recipients is now available in the predata ACL (oversight).
2466 11. Tidy the search cache before the fork to do a delivery from a message
2467 received from the command line. Otherwise the child will trigger a lookup
2468 failure and thereby defer the delivery if it tries to use (for example) a
2469 cached ldap connection that the parent has called unbind on.
2471 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2472 of $address_data from the recipient verification was clobbered by the
2473 sender verification.
2475 13. The value of address_data from a sender verification is now available in
2476 $sender_address_data in subsequent conditions in the ACL statement.
2478 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2480 15. Added a new option "connect=<time>" to callout options, to set a different
2483 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2484 was its contents. (It was OK if the option was not defined at all.)
2486 17. A "Completed" log line is now written for messages that are removed from
2487 the spool by the -Mrm option.
2489 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2490 information about exactly what failed.
2492 19. Added -dd to debug only the daemon process.
2494 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2495 handles timeouts, both on the server side and network timeouts. Renamed the
2496 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2498 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2499 It is now set to "smtps".
2501 22. $host_address is now set to the target address during the checking of
2502 ignore_target_hosts.
2504 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2505 being passed; this would have caused $sender_host_name to have been used if
2506 matching the list had actually called for a host name (not very likely,
2507 since this list is usually IP addresses). A host name is now passed as
2510 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2511 code that specifies a non-restarting handler (typically sigaction() in
2512 modern systems) in an attempt to fix a rare and obscure crash bug.
2514 25. Narrowed the window for a race in the daemon that could cause it to ignore
2515 SIGCHLD signals. This is not a major problem, because they are used only to
2516 wake it up if nothing else does.
2518 26. A malformed maildirsize file could cause Exim to calculate negative values
2519 for the mailbox size or file count. Odd effects could occur as a result.
2520 The maildirsize information is now recalculated if the size or filecount
2523 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2524 support for a long time. Removed HAVE_SYS_VFS_H.
2526 28. Installed the latest version of exipick from John Jetmore.
2528 29. In an address list, if the pattern was not a regular expression, an empty
2529 subject address (from a bounce message) matched only if the pattern was an
2530 empty string. Non-empty patterns were not even tested. This was the wrong
2531 because it is perfectly reasonable to use an empty address as part of a
2532 database query. An empty address is now tested by patterns that are
2533 lookups. However, all the other forms of pattern expect the subject to
2534 contain a local part and a domain, and therefore, for them, an empty
2535 address still always fails if the pattern is not itself empty.
2537 30. Exim went into a mad DNS loop when attempting to do a callout where the
2538 host was specified on an smtp transport, and looking it up yielded more
2539 than one IP address.
2541 31. Re-factored the code for checking spool and log partition space into a
2542 function that finds that data and another that does the check. The former
2543 is then used to implement four new variables: $spool_space, $log_space,
2544 $spool_inodes, and $log_inodes.
2546 32. The RFC2047 encoding function was originally intended for short strings
2547 such as real names; it was not keeping to the 75-character limit for
2548 encoded words that the RFC imposes. It now respects the limit, and
2549 generates multiple encoded words if necessary. To be on the safe side, I
2550 have increased the buffer size for the ${rfc2047: expansion operator from
2553 33. It is now permitted to omit both strings after an "if" condition; if the
2554 condition is true, the result is "true". As before, when the second string
2555 is omitted, a false condition yields an empty string. This makes it less
2556 cumbersome to write custom ACL and router conditions.
2558 34. Failure to deliver a bounce message always caused it to be frozen, even if
2559 there was an errors_to setting on the router. The errors_to setting is now
2562 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2563 canonical form (fully expanded) before being placed in
2564 $sender_host_address.
2566 36. The table in the code that translates DNS record types into text (T_A to
2567 "A" for instance) was missing entries for NS and CNAME. It is just possible
2568 that this could have caused confusion if both these types were looked up
2569 for the same domain, because the text type is used as part of Exim's
2570 per-process caching. But the chance of anyone hitting this buglet seems
2573 37. The dnsdb lookup has been extended in a number of ways.
2575 (1) There is a new type, "zns", which walks up the domain tree until it
2576 finds some nameserver records. It should be used with care.
2578 (2) There is a new type, "mxh", which is like "mx" except that it returns
2579 just the host names, not the priorities.
2581 (3) It is now possible to give a list of domains (or IP addresses) to be
2582 looked up. The behaviour when one of the lookups defers can be
2583 controlled by a keyword.
2585 (4) It is now possible to specify the separator character for use when
2586 multiple records are returned.
2588 38. The dnslists ACL condition has been extended: it is now possible to supply
2589 a list of IP addresses and/or domains to be looked up in a particular DNS
2592 39. Added log_selector=+queue_time_overall.
2594 40. When running the queue in the test harness, wait just a tad after forking a
2595 delivery process, to get repeatability of debugging output.
2597 41. Include certificate and key file names in error message when GnuTLS fails
2598 to set them up, because the GnuTLS error message doesn't include the name
2599 of the failing file when there is a problem reading it.
2601 42. Allow both -bf and -bF in the same test run.
2603 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2605 44. The "Exiscan patch" is now merged into the mainline Exim source.
2607 45. Sometimes the final signoff response after QUIT could fail to get
2608 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2609 < 0 before doing a fflush(). This bug looks as though it goes back to the
2610 introduction of TLS in release 3.20, but "sometimes" must have been rare
2611 because the tests only now provoked it.
2613 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2614 (this can affect the format of dates).
2616 47. exim_tidydb, when checking for the continued existence of a message for
2617 which it has found a message-specific retry record, was not finding
2618 messages that were in split spool directories. Consequently, it was
2619 deleting retry records that should have stayed in existence.
2621 48. Steve fixed some bugs in eximstats.
2623 49. The SPA authentication driver was not abandoning authentication and moving
2624 on to the next authenticator when an expansion was forced to fail,
2625 contradicting the general specification for all authenticators. Instead it
2626 was generating a temporary error. It now behaves as specified.
2628 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2629 (the order specifies the preference for clients). The order is now AES256,
2630 AES128, 3DES, ARCFOUR128.
2632 51. Small patch to Sieve code - explicitly set From: when generating an
2635 52. Exim crashed if a remote delivery caused a very long error message to be
2636 recorded - for instance if somebody sent an entire SpamAssassin report back
2637 as a large number of 550 error lines. This bug was coincidentally fixed by
2638 increasing the size of one of Exim's internal buffers (big_buffer) that
2639 happened as part of the Exiscan merge. However, to be on the safe side, I
2640 have made the code more robust (and fixed the comments that describe what
2643 53. Now that there can be additional text after "Completed" in log lines (if
2644 the queue_time_overall log selector is set), a one-byte patch to exigrep
2645 was needed to allow it to recognize "Completed" as not the last thing in
2648 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2649 patch that reportedly fixes this has been added. I am not expert enough to
2650 create a test for it. This is what the patch creator wrote:
2652 "I found a little strange behaviour of ldap code when working with
2653 Windows 2003 AD Domain, where users was placed in more than one
2654 Organization Units. When I tried to give exim partial DN, the exit code
2655 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2656 But simultaneously result of request was absolutely normal ldap result,
2657 so I produce this patch..."
2659 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2660 REFERENCE, so I have modified the code to exclude the patch when that macro
2663 55. Some experimental protocols are using DNS PTR records for new purposes. The
2664 keys for these records are domain names, not reversed IP addresses. The
2665 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2666 leaves it alone. Component reversal etc. now happens only for IP addresses.
2669 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2671 57. Double the size of the debug message buffer (to 2048) so that more of very
2672 long debug lines gets shown.
2674 58. The exicyclog utility now does better if the number of log files to keep
2675 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2677 59. Two changes related to the smtp_active_hostname option:
2679 (1) $smtp_active_hostname is now available as a variable.
2680 (2) The default for smtp_banner uses $smtp_active_hostname instead
2681 of $primary_hostname.
2683 60. The host_aton() function is supposed to be passed a string that is known
2684 to be a valid IP address. However, in the case of IPv6 addresses, it was
2685 not checking this. This is a hostage to fortune. Exim now panics and dies
2686 if the condition is not met. A case was found where this could be provoked
2687 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2688 components; fortuitously, this particular loophole had already been fixed
2689 by change 4.50/55 above.
2691 If there are any other similar loopholes, the new check in host_aton()
2692 itself should stop them being exploited. The report I received stated that
2693 data on the command line could provoke the exploit when Exim was running as
2694 exim, but did not say which command line option was involved. All I could
2695 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2696 running as the user.
2699 61. There was a buffer overflow vulnerability in the SPA authentication code
2700 (which came originally from the Samba project). I have added a test to the
2701 spa_base64_to_bits() function which I hope fixes it.
2704 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2705 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2707 63. The daemon start-up calls getloadavg() while still root for those OS that
2708 need the first call to be done as root, but it missed one case: when
2709 deliver_queue_load_max is set with deliver_drop_privilege. This is
2710 necessary for the benefit of the queue runner, because there is no re-exec
2711 when deliver_drop_privilege is set.
2713 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2714 This has been fixed.
2716 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2717 was in use, was not putting the data itself into the right store pool;
2718 consequently, it could be overwritten for a subsequent message in the same
2719 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2722 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2724 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2725 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2726 the function were treating the return as a boolean value, which happened to
2727 work because 0=false and not-0=true, but is not correct code.
2729 68. The host_aton() function was not handling scoped IPv6 addresses (those
2730 with, for example, "%eth0" on the end) correctly.
2732 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2733 negated items (that is, ~something) in unsigned ints. Some compilers
2734 apparently mutter when there is no cast.
2736 70. If an address verification called from an ACL failed, and did not produce a
2737 user-specific message (i.e. there was only a "system" message), nothing was
2738 put in $acl_verify_message. In this situation, it now puts the system
2741 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2742 session; change 4.31/43 added the unwanted input to the log line - except
2743 that it did not do this in the start of session case. It now does.
2745 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2746 This is wrong and can cause the other end to generate a synchronization
2747 error if it is another Exim or anything else that does the synchronization
2748 check. A QUIT command is no longer sent after a timeout.
2750 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2751 during host lookups.
2753 74. The defer_ok option of callout verification was not working if it was used
2754 when verifying addresses in header lines, that is, for this case:
2756 verify = header_sender/callout=defer_ok
2758 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2759 those file descriptors could be used for SMTP connections. If anything
2760 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2761 could be sent to the SMTP client, causing chaos. The daemon now opens
2762 stdin, stdout, and stderr to /dev/null when it puts itself into the
2765 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2766 log by default. The user can override this with suitable Perl magic.
2768 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2769 the log message when discard triggers, was not working for the DATA ACL or
2770 for the non-SMTP ACL.
2772 78. Error message wording change in sieve.c.
2774 79. If smtp_accept_max_per_host was set, the number of connections could be
2775 restricted to fewer than expected, because the daemon was trying to set up
2776 a new connection before checking whether the processes handling previous
2777 connections had finished. The check for completed processes is now done
2778 earlier. On busy systems, this bug wouldn't be noticed because something
2779 else would have woken the daemon, and it would have reaped the completed
2782 80. If a message was submitted locally by a user whose login name contained one
2783 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2784 It caused a spool format error. I have fixed the spool reading code. A
2785 related problem was that the "from" clause in the Received: line became
2786 illegal because of the space(s). It is now covered by ${quote_local_part.
2788 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2791 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2793 83. Patch from Sieve maintainer to fix unterminated string problem in
2794 "vacation" handling.
2796 84. Some minor changes to the Linux configuration files to help with other
2797 OS variants using glibc.
2799 85. One more patch for Sieve to update vacation handling to latest spec.
2802 ----------------------------------------------------
2803 See the note above about the 4.44 and 4.50 releases.
2804 ----------------------------------------------------
2810 1. Change 4.43/35 introduced a bug that caused file counts to be
2811 incorrectly computed when quota_filecount was set in an appendfile
2814 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2815 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2818 3. Give more explanation in the error message when the command for a transport
2819 filter fails to execute.
2821 4. There are several places where Exim runs a non-Exim command in a
2822 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2823 was being done only for the command run by the queryprogram router. It is
2824 now done for all such subprocesses. The other cases are: ${run, transport
2825 filters, and the commands run by the lmtp and pipe transports.
2827 5. Some older OS have a limit of 256 on the maximum number of file
2828 descriptors. Exim was using setrlimit() to set 1000 as a large value
2829 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2830 systems. I've change it so that if it can't get 1000, it tries for 256.
2832 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2833 was an oversight, and furthermore, ever since the addition of extra
2834 controls (e.g. 4.43/32), the checks on when to allow different forms of
2835 "control" were broken. There should now be diagnostics for all cases when a
2836 control that does not make sense is encountered.
2838 7. $recipients is now available in the predata ACL (oversight).
2840 8. Tidy the search cache before the fork to do a delivery from a message
2841 received from the command line. Otherwise the child will trigger a lookup
2842 failure and thereby defer the delivery if it tries to use (for example) a
2843 cached ldap connection that the parent has called unbind on.
2845 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2846 of $address_data from the recipient verification was clobbered by the
2847 sender verification.
2849 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2850 was its contents. (It was OK if the option was not defined at all.)
2852 11. A "Completed" log line is now written for messages that are removed from
2853 the spool by the -Mrm option.
2855 12. $host_address is now set to the target address during the checking of
2856 ignore_target_hosts.
2858 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2859 being passed; this would have caused $sender_host_name to have been used if
2860 matching the list had actually called for a host name (not very likely,
2861 since this list is usually IP addresses). A host name is now passed as
2864 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2865 code that specifies a non-restarting handler (typically sigaction() in
2866 modern systems) in an attempt to fix a rare and obscure crash bug.
2868 15. Narrowed the window for a race in the daemon that could cause it to ignore
2869 SIGCHLD signals. This is not a major problem, because they are used only to
2870 wake it up if nothing else does.
2872 16. A malformed maildirsize file could cause Exim to calculate negative values
2873 for the mailbox size or file count. Odd effects could occur as a result.
2874 The maildirsize information is now recalculated if the size or filecount
2877 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2878 support for a long time. Removed HAVE_SYS_VFS_H.
2880 18. Updated exipick to current release from John Jetmore.
2882 19. Allow an empty sender to be matched against a lookup in an address list.
2883 Previously the only cases considered were a regular expression, or an
2886 20. Exim went into a mad DNS lookup loop when doing a callout where the
2887 host was specified on the transport, if the DNS lookup yielded more than
2890 21. The RFC2047 encoding function was originally intended for short strings
2891 such as real names; it was not keeping to the 75-character limit for
2892 encoded words that the RFC imposes. It now respects the limit, and
2893 generates multiple encoded words if necessary. To be on the safe side, I
2894 have increased the buffer size for the ${rfc2047: expansion operator from
2897 22. Failure to deliver a bounce message always caused it to be frozen, even if
2898 there was an errors_to setting on the router. The errors_to setting is now
2901 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2902 canonical form (fully expanded) before being placed in
2903 $sender_host_address.
2905 24. Updated eximstats to version 1.33
2907 25. Include certificate and key file names in error message when GnuTLS fails
2908 to set them up, because the GnuTLS error message doesn't include the name
2909 of the failing file when there is a problem reading it.
2911 26. Expand error message when OpenSSL has problems setting up cert/key files.
2914 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2915 (this can affect the format of dates).
2917 28. exim_tidydb, when checking for the continued existence of a message for
2918 which it has found a message-specific retry record, was not finding
2919 messages that were in split spool directories. Consequently, it was
2920 deleting retry records that should have stayed in existence.
2922 29. eximstats updated to version 1.35
2923 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2924 1.35 - bugfix such that pie charts by volume are generated correctly
2926 30. The SPA authentication driver was not abandoning authentication and moving
2927 on to the next authenticator when an expansion was forced to fail,
2928 contradicting the general specification for all authenticators. Instead it
2929 was generating a temporary error. It now behaves as specified.
2931 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2932 (the order specifies the preference for clients). The order is now AES256,
2933 AES128, 3DES, ARCFOUR128.
2935 31. Small patch to Sieve code - explicitly set From: when generating an
2938 32. Exim crashed if a remote delivery caused a very long error message to be
2939 recorded - for instance if somebody sent an entire SpamAssassin report back
2940 as a large number of 550 error lines. This bug was coincidentally fixed by
2941 increasing the size of one of Exim's internal buffers (big_buffer) that
2942 happened as part of the Exiscan merge. However, to be on the safe side, I
2943 have made the code more robust (and fixed the comments that describe what
2946 33. Some experimental protocols are using DNS PTR records for new purposes. The
2947 keys for these records are domain names, not reversed IP addresses. The
2948 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2949 leaves it alone. Component reversal etc. now happens only for IP addresses.
2952 34. The host_aton() function is supposed to be passed a string that is known
2953 to be a valid IP address. However, in the case of IPv6 addresses, it was
2954 not checking this. This is a hostage to fortune. Exim now panics and dies
2955 if the condition is not met. A case was found where this could be provoked
2956 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2957 components; fortuitously, this particular loophole had already been fixed
2958 by change 4.50/55 or 4.44/33 above.
2960 If there are any other similar loopholes, the new check in host_aton()
2961 itself should stop them being exploited. The report I received stated that
2962 data on the command line could provoke the exploit when Exim was running as
2963 exim, but did not say which command line option was involved. All I could
2964 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2965 running as the user.
2968 35. There was a buffer overflow vulnerability in the SPA authentication code
2969 (which came originally from the Samba project). I have added a test to the
2970 spa_base64_to_bits() function which I hope fixes it.
2973 36. The daemon start-up calls getloadavg() while still root for those OS that
2974 need the first call to be done as root, but it missed one case: when
2975 deliver_queue_load_max is set with deliver_drop_privilege. This is
2976 necessary for the benefit of the queue runner, because there is no re-exec
2977 when deliver_drop_privilege is set.
2979 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2980 was in use, was not putting the data itself into the right store pool;
2981 consequently, it could be overwritten for a subsequent message in the same
2982 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2985 38. Sometimes the final signoff response after QUIT could fail to get
2986 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2987 < 0 before doing a fflush(). This bug looks as though it goes back to the
2988 introduction of TLS in release 3.20, but "sometimes" must have been rare
2989 because the tests only now provoked it.
2995 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2996 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2997 Now it returns an integer. A number of calls were still expecting a T/F
2998 return. Fortuitously, in all cases, the tests worked in OK situations,
2999 which is the norm. However, things would have gone wrong on any write
3000 failures on the smtp file descriptor. This function is used when sending
3001 messages over SMTP and also when doing verify callouts.
3003 2. When Exim is called to do synchronous delivery of a locally submitted
3004 message (the -odf or -odi options), it no longer closes stderr before doing
3007 3. Implemented the mua_wrapper option.
3009 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3011 5. Implemented the functions header_remove(), header_testname(),
3012 header_add_at_position(), and receive_remove_recipient(), and exported them
3015 6. If an ACL "warn" statement specified the addition of headers, Exim already
3016 inserted X-ACL-Warn: at the start if there was no header name. However, it
3017 was not making this test for the second and subsequent header lines if
3018 there were newlines in the string. This meant that an invalid header could
3019 be inserted if Exim was badly configured.
3021 7. Allow an ACL "warn" statement to add header lines at the start or after all
3022 the Received: headers, as well as at the end.
3024 8. Added the rcpt_4xx retry error code.
3026 9. Added postmaster_mailfrom=xxx to callout verification option.
3028 10. Added mailfrom=xxxx to the callout verification option, for verify=
3031 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3032 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3034 12. Inserted some casts to stop certain compilers warning when using pointer
3035 differences as field lengths or precisions in printf-type calls (mostly
3036 affecting debugging statements).
3038 13. Added optional readline() support for -be (dynamically loaded).
3040 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3041 same clock tick as a message's arrival, so that its received time was the
3042 same as the "first fail" time on the retry record, and that message
3043 remained on the queue past the ultimate address timeout, every queue runner
3044 would try a delivery (because it was past the ultimate address timeout) but
3045 after another failure, the ultimate address timeout, which should have then
3046 bounced the address, did not kick in. This was a "< instead of <=" error;
3047 in most cases the first failure would have been in the next clock tick
3048 after the received time, and all would be well.
3050 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3051 being recognized when the domain list was tested by the match_domain
3052 condition in an expansion string.
3054 16. Added the ${str2b64: operator.
3056 17. Exim was always calling setrlimit() to set a large limit for the number of
3057 processes, without checking whether the existing limit was already
3058 adequate. (It did check for the limit on file descriptors.) Furthermore,
3059 errors from getrlimit() and setrlimit() were being ignored. Now they are
3060 logged to the main and panic logs, but Exim does carry on, to try to do its
3061 job under whatever limits there are.
3063 18. Imported PCRE 5.0.
3065 19. Trivial typo in log message " temporarily refused connection" (the leading
3068 20. If the log selector return_path_on_delivery was set and an address was
3069 redirected to /dev/null, the delivery process crashed because it assumed
3070 that a return path would always be set for a "successful" delivery. In this
3071 case, the whole delivery is bypassed as an optimization, and therefore no
3074 21. Internal re-arrangement: the function for sending a challenge and reading
3075 a response while authentication was assuming a zero-terminated challenge
3076 string. It's now changed to take a pointer and a length, to allow for
3077 binary data in such strings.
3079 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3081 23. Exim was not respecting finduser_retries when seeking the login of the
3082 uid under which it was called; it was always trying 10 times. (The default
3083 setting of finduser_retries is zero.) Also, it was sleeping after the final
3084 failure, which is pointless.
3086 24. Implemented tls_on_connect_ports.
3088 25. Implemented acl_smtp_predata.
3090 26. If the domain in control=submission is set empty, Exim assumes that the
3091 authenticated id is a complete email address when it generates From: or
3092 Sender: header lines.
3094 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3095 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3096 chown and chgrp in /bin and hostname in /usr/bin.
3098 28. Exim was keeping the "process log" file open after each use, just as it
3099 does for the main log. This opens the possibility of it remaining open for
3100 long periods when the USR1 signal hits a daemon. Occasional processlog
3101 errors were reported, that could have been caused by this. Anyway, it seems
3102 much more sensible not to leave this file open at all, so that is what now
3105 29. The long-running daemon process does not normally write to the log once it
3106 has entered its main loop, and it closes the log before doing so. This is
3107 so that log files can straightforwardly be renamed and moved. However,
3108 there are a couple of unusual error situations where the daemon does write
3109 log entries, and I had neglected to close the log afterwards.
3111 30. The text of an SMTP error response that was received during a remote
3112 delivery was being truncated at 512 bytes. This is too short for some of
3113 the long messages that one sometimes sees. I've increased the limit to
3116 31. It is now possible to make retry rules that apply only when a message has a
3117 specific sender, in particular, an empty sender.
3119 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3120 it possible to be selective about when SMTP synchronization is enforced.
3122 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3124 32. Implemented hosts_connection_nolog.
3126 33. Added an ACL for QUIT.
3128 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3131 35. Added mailbox_size and mailbox_filecount to appendfile.
3133 36. Added control = no_multiline_responses to ACLs.
3135 37. There was a bug in the logic of the code that waits for the clock to tick
3136 in the case where the clock went backwards by a substantial amount such
3137 that the microsecond fraction of "now" was more than the microsecond
3138 fraction of "then" (but the whole seconds number was less).
3140 38. Added support for the libradius Radius client library this is found on
3141 FreeBSD (previously only the radiusclient library was supported).
3147 1. When certain lookups returned multiple values in the form name=value, the
3148 quoting of the values was not always being done properly. Specifically:
3149 (a) If the value started with a double quote, but contained no whitespace,
3151 (b) If the value contained whitespace other than a space character (i.e.
3152 tabs or newlines or carriage returns) it was not quoted.
3153 This fix has been applied to the mysql and pgsql lookups by writing a
3154 separate quoting function and calling it from the lookup code. The fix
3155 should probably also be applied to nisplus, ibase and oracle lookups, but
3156 since I cannot test any of those, I have not disturbed their existing code.
3158 2. A hit in the callout cache for a specific address caused a log line with no
3159 reason for rejecting RCPT. Now it says "Previous (cached) callout
3160 verification failure".
3162 3. There was an off-by-one bug in the queryprogram router. An over-long
3163 return line was truncated at 256 instead of 255 characters, thereby
3164 overflowing its buffer with the terminating zero. As well as fixing this, I
3165 have increased the buffer size to 1024 (and made a note to document this).
3167 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3168 when Exim is waiting for an SMTP response from a remote server, Exim
3169 restarts its select() call on the socket, thereby resetting its timeout.
3170 This is not a problem when such interrupts are rare. Somebody set up a cron
3171 job to run exiwhat every 2 minutes, which is less than the normal select()
3172 timeout (5 or 10 minutes). This meant that the select() timeout never
3173 kicked in because it was always reset. I have fixed this by comparing the
3174 time when an interrupt arrives with the time at the start of the first call
3175 to select(). If more time than the timeout has elapsed, the interrupt is
3176 treated as a timeout.
3178 5. Some internal re-factoring in preparation for the addition of Sieve
3179 extensions (by MH). In particular, the "personal" test is moved to a
3180 separate function, and given an option for scanning Cc: and Bcc: (which is
3181 not set for Exim filters).
3183 6. When Exim created an email address using the login of the caller as the
3184 local part (e.g. when creating a From: or Sender: header line), it was not
3185 quoting the local part when it contained special characters such as @.
3187 7. Installed new OpenBSD configuration files.
3189 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3190 try to make them clearer.
3192 9. Callout options, other than the timeout value, were being ignored when
3193 verifying sender addresses in header lines. For example, when using
3195 verify = header_sender/callout=no_cache
3197 the cache was (incorrectly) being used.
3199 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3200 only the Cygwin environment.
3202 11. When return_path_on_delivery was set as a log selector, if different remote
3203 addresses in the same message used different return paths and parallel
3204 remote delivery occurred, the wrong values would sometimes be logged.
3205 (Whenever a remote delivery process finished, the return path value from
3206 the most recently started remote delivery process was logged.)
3208 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3209 lines when AUTH and/or TLS are in use. This is the "received protocol"
3210 field. Exim used to use "asmtp" for authenticated SMTP, without any
3211 indication (in the protocol name) for TLS use. Now it follows the RFC and
3212 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3213 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3214 names appear in log lines as well as in Received: header lines.
3216 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3217 extensions, and comparison tests, and to fix some bugs.
3219 14. Changes to the "personal" filter test:
3221 (1) The test was buggy in that it was just doing the equivalent of
3222 "contains" tests on header lines. For example, if a user's address was
3223 anne@some.where, the "personal" test would incorrectly be true for
3225 To: susanne@some.where
3227 This test is now done by extracting each address from the header in turn,
3228 and checking the entire address. Other tests that are part of "personal"
3229 are now done using regular expressions (for example, to check local parts
3230 of addresses in From: header lines).
3232 (2) The list of non-personal local parts in From: addresses has been
3233 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3234 taken from the Sieve specification recommendations.
3236 (3) If the message contains any header line starting with "List-" it is
3237 treated as non-personal.
3239 (4) The test for "circular" in the Subject: header line has been removed
3240 because it now seems ill-conceived.
3242 15. Minor typos in src/EDITME comments corrected.
3244 16. Installed latest exipick from John Jetmore.
3246 17. If headers_add on a router specified a text string that was too long for
3247 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3248 of string_sprintf() is now avoided.
3250 18. $message_body_size was not set (it was always zero) when running the DATA
3251 ACL and the local_scan() function.
3253 19. For the "mail" command in an Exim filter, no default was being set for
3254 the once_repeat time, causing a random time value to be used if "once" was
3255 specified. (If the value happened to be <= 0, no repeat happened.) The
3256 default is now 0s, meaning "never repeat". The "vacation" command was OK
3257 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3258 (I found it when inspecting the code).
3260 20. There is now an overall timeout for performing a callout verification. It
3261 defaults to 4 times the callout timeout, which applies to individual SMTP
3262 commands during the callout. The overall timeout applies when there is more
3263 than one host that can be tried. The timeout is checked before trying the
3264 next host. This prevents very long delays if there are a large number of
3265 hosts and all are timing out (e.g. when the network connections are timing
3266 out). The value of the overall timeout can be changed by specifying an
3267 additional sub-option for "callout", called "maxwait". For example:
3269 verify = sender/callout=5s,maxwait=20s
3271 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3272 to the end before writing, but this should make it even safer).
3274 22. Exim was forgetting that it had advertised PIPELINING for the second and
3275 subsequent messages on an SMTP connection. It was also not resetting its
3276 memory on STARTTLS and an internal HELO.
3278 23. When Exim logs an SMTP synchronization error within a session, it now
3279 records whether PIPELINING has been advertised or not.
3281 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3282 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3283 rather than long int.
3285 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3287 26. Added the never_mail option to autoreply.
3293 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3294 crash if the getsockname() call failed; this can happen if a connection is
3295 closed very soon after it is established. The problem was simply in the
3296 order in which certain operations were done, causing Exim to try to write
3297 to the SMTP stream before it had set up the file descriptor. The bug has
3298 been fixed by making things happen in the correct order.
3304 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3305 before the connection was closed, thus losing the rejection response.
3307 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3308 some early Solaris releases, but causes trouble in current releases where
3309 socklen_t is defined.
3311 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3314 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3317 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3318 that releasing the top of it at the end releases what was used for sub-
3319 expansions (unless the block got too big). However, discard this block if
3320 the first thing is a variable or header, so that we can use its block when
3321 it is dynamic (useful for very large $message_headers, for example).
3323 6. Lookups now cache *every* query, not just the most recent. A new, separate
3324 store pool is used for this. It can be recovered when all lookup caches are
3325 flushed. Lookups now release memory at the end of their result strings.
3326 This has involved some general refactoring of the lookup sources.
3328 7. Some code has been added to the store_xxx() functions to reduce the amount
3329 of flapping under certain conditions.
3331 8. log_incoming_interface used to affect only the <= reception log lines. Now
3332 it causes the local interface and port to be added to several more SMTP log
3333 lines, for example "SMTP connection from", and rejection lines.
3335 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3337 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3339 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3340 could be overwritten at the end of the current message (or the start of a
3341 new message if it was set in a HELO ACL). The value is now preserved for
3342 the duration of the SMTP connection.
3344 12. If a transport had a headers_rewrite setting, and a matching header line
3345 contained an unqualified address, that address was qualified, even if it
3346 did not match any rewriting rules. The underlying bug was that the values
3347 of the flags that permit the existence of unqualified sender and recipient
3348 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3349 non-local messages, and by -bnq for local messages) were not being
3350 preserved with the message after it was received.
3352 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3353 "next input=" as part of the text comprising the host identity instead of
3354 the correct text. The code was using the same buffer for two different
3355 strings. However, depending on which order the printing function evaluated
3356 its arguments, the bug did not always show up. Under Linux, for example, my
3357 test suite worked just fine.
3359 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3360 doesn't work with some older versions of Perl. It has been changed to "my",
3361 which in any case is probably the better facility to use.
3363 15. A really picky compiler found some instances of statements for creating
3364 error messages that either had too many or two few arguments for the format
3367 16. The size of the buffer for calls to the DNS resolver has been increased
3368 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3369 for addresses that have a lot of PTR records. This alleviates a problem; it
3370 does not fully solve it.
3372 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3373 buffer now truncates the list and logs the incident, which is the same
3374 action as happens when Exim is looking up a host name and its aliases.
3375 Previously in this situation something unpredictable would happen;
3376 sometimes it was "internal error: store_reset failed".
3378 18. If a server dropped the connection unexpectedly when an Exim client was
3379 using GnuTLS and trying to read a response, the client delivery process
3380 crashed while trying to generate an error log message.
3382 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3383 string, for example:
3385 warn message = H1: something\nH2: something
3387 the text was added as a single header line from Exim's point of view
3388 though it ended up OK in the delivered message. However, searching for the
3389 second and subsequent header lines using $h_h2: did not work. This has been
3390 fixed. Similarly, if a system filter added multiple headers in this way,
3391 the routers could not see them.
3393 20. Expanded the error message when iplsearch is called with an invalid key to
3394 suggest using net-iplsearch in a host list.
3396 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3397 ACLs are no longer actually imposed (and a message to that effect is
3400 22. If a "gecos" field in a passwd entry contained escaped characters, in
3401 particular, if it contained a \" sequence, Exim got it wrong when building
3402 a From: or a Sender: header from that name. A second bug also caused
3403 incorrect handling when an unquoted " was present following a character
3404 that needed quoting.
3406 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3407 was not being matched caselessly.
3409 24. Arranged for all hyphens in the exim.8 source to be escaped with
3412 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3413 properly. Recipient callout cache records were still being keyed to include
3414 the sender, even when use_sender was set false. This led to far more
3415 callouts that were necessary. The sender is no longer included in the key
3416 when use_sender is false.
3418 26. Added "control = submission" modifier to ACLs.
3420 27. Added the ${base62d: operator to decode base 62 numbers.
3422 28. dnsdb lookups can now access SRV records.
3424 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3425 the configuration file.
3427 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3428 (-v) mode. This makes the output for a verbose queue run more intelligible.
3430 31. Added a use_postmaster feature to recipient callouts.
3432 32. Added the $body_zerocount variable, containing the number of binary zero
3433 bytes in the message body.
3435 33. The time of last modification of the "new" subdirectory is now used as the
3436 "mailbox time last read" when there is a quota error for a maildir
3439 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3441 35. Added +ignore_unknown as a special item in host lists.
3443 36. Code for decoding IPv6 addresses in host lists is now included, even if
3444 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3445 address was recognized as an IP address, but was then not correctly decoded
3446 into binary, causing unexpected and incorrect effects when compared with
3453 1. Very minor rewording of debugging text in manualroute to say "list of
3454 hosts" instead of "hostlist".
3456 2. If verify=header_syntax was set, and a header line with an unqualified
3457 address (no domain) and a large number of spaces between the end of the
3458 name and the colon was received, the reception process suffered a buffer
3459 overflow, and (when I tested it) crashed. This was caused by some obsolete
3460 code that should have been removed. The fix is to remove it!
3462 3. When running in the test harness, delay a bit after writing a bounce
3463 message to get a bit more predictability in the log output.
3465 4. Added a call to search_tidyup() just before forking a reception process. In
3466 theory, someone could use a lookup in the expansion of smtp_accept_max_
3467 per_host which, without the tidyup, could leave open a database connection.
3469 5. Added the variables $recipient_data and $sender_data which get set from a
3470 lookup success in an ACL "recipients" or "senders" condition, or a router
3471 "senders" option, similar to $domain_data and $local_part_data.
3473 6. Moved the writing of debug_print from before to after the "senders" test
3476 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3477 problems for message scanning, either using a data ACL, or using
3478 local_scan() because the Received: header was not generated till after they
3479 were called (in order to set the time as the time of reception completion).
3480 I have revised the way this works. The header is now generated after the
3481 body is received, but before the ACL or local_scan() are called. After they
3482 are run, the timestamp in the header is updated.
3488 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3489 before starting a queue runner without re-exec. This happened only when
3490 deliver_drop_privilege was set or when the Exim user was set to root. The
3491 effect of the bug was that timeouts during subsequent deliveries caused
3492 crashes instead of being properly handled. The handler is now left at its
3493 default (and expected) setting.
3495 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3496 message, again when deliver_drop_privilege is set or Exim is run as root.
3497 The bug described in (1) was not present in this case, but the tidying up
3498 of the other signals was missing. I have made the two cases consistent.
3500 3. The ignore_target_hosts setting on a manualroute router was being ignored
3501 for hosts that were looked up using the /MX notation.
3503 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3506 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3507 operated on the sender address. After changing the $sender_address to <>
3508 for the sender address verify, Exim was re-instated it as the original
3509 (before rewriting) address, but remembering that it had rewritten it, so it
3510 wasn't rewriting it again. This bug also had the effect of breaking the
3511 sender address verification caching when the sender address was rewritten.
3513 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3514 This has been changed so that if the ip literal address matches
3515 ignore_target_hosts, the router declines.
3517 7. Added expansion conditions match_domain, match_address, and match_local_
3518 part (NOT match_host).
3520 8. The placeholder for the Received: header didn't have a length field set.
3522 9. Added code to Exim itself and to exim_lock to test for a specific race
3523 condition that could lead to file corruption when using MBX delivery. The
3524 issue is with the lockfile that is created in /tmp. If this file is removed
3525 after a process has opened it but before that process has acquired a lock,
3526 there is the potential for a second process to recreate the file and also
3527 acquire a lock. This could lead to two Exim processes writing to the file
3528 at the same time. The added code performs the same test as UW imapd; it
3529 checks after acquiring the lock that its file descriptor still refers to
3530 the same named file.
3532 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3533 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3536 11. Added the smtp_active_hostname option. If used, this will typically be made
3537 to depend on the incoming interface address. Because $interface_address is
3538 not set up until the daemon has forked a reception process, error responses
3539 that can happen earlier (such as "too many connections") no longer contain
3542 12. If an expansion in a condition on a "warn" statement fails because a lookup
3543 defers, the "warn" statement is abandoned, and the next ACL statement is
3544 processed. Previously this caused the whole ACL to be aborted.
3546 13. Added the iplsearch lookup type.
3548 14. Added ident_timeout as a log selector.
3550 15. Added tls_certificate_verified as a log selector.
3552 16. Added a global option tls_require_ciphers (compare the smtp transport
3553 option of the same name). This controls incoming TLS connections.
3555 17. I finally figured out how to make tls_require_ciphers do a similar thing
3556 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3557 before starting the TLS session.
3559 18. Tabs are now shown as \t in -bP output.
3561 19. If the log selector return_path_on_delivery was set, Exim crashed when
3562 bouncing a message because it had too many Received: header lines.
3564 20. If two routers both had headers_remove settings, and the first one included
3565 a superfluous trailing colon, the final name in the first list and the
3566 first name in the second list were incorrectly joined into one item (with a
3567 colon in the middle).
3573 1. Added -C and -D options to the exinext utility, mainly to make it easier
3574 to include in the automated testing, but these could be helpful when
3575 multiple configurations are in use.
3577 2. The exinext utility was not formatting the output nicely when there was
3578 an alternate port involved in the retry record key, nor when there was a
3579 message id as well (for retries that were specific to a specific message
3580 and a specific host). It was also confused by IPv6 addresses, because of
3581 the additional colons they contain. I have fixed the IPv4 problem, and
3582 patched it up to do a reasonable job for IPv6.
3584 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3585 delivery, the log line now contains "pipelined" if PIPELINING was used.
3587 4. An SMTP transport process used to panic and die if the bind() call to set
3588 an explicit outgoing interface failed. This has been changed; it is now
3589 treated in the same way as a connect() failure.
3591 5. A reference to $sender_host_name in the part of a conditional expansion
3592 that was being skipped was still causing a DNS lookup. This no longer
3595 6. The def: expansion condition was not recognizing references to header lines
3596 that used bh_ and bheader_.
3598 7. Added the _cache feature to named lists.
3600 8. The code for checking quota_filecount in the appendfile transport was
3601 allowing one more file than it should have been.
3603 9. For compatibility with Sendmail, the command line option
3611 and sets the incoming protocol and host name (for trusted callers). The
3612 host name and its colon can be omitted when only the protocol is to be set.
3613 Note the Exim already has two private options, -pd and -ps, that refer to
3614 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3615 "s", but I don't think that's a major issue.
3617 10. A number of refactoring changes to the code, none of which should affect
3620 (a) The number of logging options was getting close to filling up the
3621 32-bit word that was used as a bit map. I have split them into two classes:
3622 those that are passed in the argument to log_write(), and those that are
3623 only ever tested independently outside of that function. These are now in
3624 separate 32-bit words, so there is plenty of room for expansion again.
3625 There is no change in the user interface or the logging behaviour.
3627 (b) When building, for example, log lines, the code previously used a
3628 macro that called string_cat() twice, in order to add two strings. This is
3629 not really sufficiently general. Furthermore, there was one instance where
3630 it was actually wrong because one of the argument was used twice, and in
3631 one call a function was used. (As it happened, calling the function twice
3632 did not affect the overall behaviour.) The macro has been replaced by a
3633 function that can join an arbitrary number of extra strings onto a growing
3636 (c) The code for expansion conditions now uses a table and a binary chop
3637 instead of a serial search (which was left over from when there were very
3638 few conditions). Also, it now recognizes conditions like "pam" even when
3639 the relevant support is not compiled in: a suitably worded error message is
3640 given if an attempt is made to use such a condition.
3642 11. Added ${time_interval:xxxxx}.
3644 12. A bug was causing one of the ddress fields not to be passed back correctly
3645 from remote delivery subprocesses. The field in question was not being
3646 subsequently used, so this caused to problems in practice.
3648 13. Added new log selectors queue_time and deliver_time.
3650 14. Might have fixed a bug in maildirsizefile handling that threw up
3651 "unexpected character" debug warnings, and recalculated the data
3652 unnecessarily. In any case, I expanded the warning message to give more
3655 15. Added the message "Restricted characters in address" to the statements in
3656 the default ACL that block characters like @ and % in local parts.
3658 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3659 Three changes have been made:
3661 (a) There was a serious bug; a negative response to MAIL caused the whole
3662 recipient domain to be cached as invalid, thereby blocking all messages
3663 to all local parts at the same domain, from all senders. This bug has
3664 been fixed. The domain is no longer cached after a negative response to
3665 MAIL if the sender used is not empty.
3667 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3670 (c) A new callout option, "use_sender" has been added for people who want
3671 the modified behaviour.
3677 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3680 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3681 indeed breaks things for older releases.
3683 3. Added additional logging to the case where there is a problem reading data
3684 from a filter that is running in a subprocess using a pipe, in order to
3685 try to track down a specific problem.
3687 4. Testing facility fudge: when running in the test harness and attempting
3688 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3689 getting "No route to host". Convert this to a timeout.
3691 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3694 6. Some OS don't have socklen_t but use size_t instead. This affects the
3695 fifth argument of getsockopt() amongst other things. This is now
3696 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3697 can be set for individual OS. I have set it for SunOS5, OSF1, and
3698 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3699 some earlier ones do not.
3701 7. Change 4.30/15 was not doing the test caselessly.
3703 8. The standard form for an IPv6 address literal was being rejected by address
3704 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3705 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3706 this, as well as the form without the "IPv6" on the front (but only when
3707 address literals are enabled, of course).
3709 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3711 10. Exim crashed if a message with an empty sender address specified by -f
3712 encountered a router with an errors_to setting. This could be provoked only
3713 by a command such as
3717 where an empty string was supplied; "<>" did not hit this bug.
3719 11. Installed PCRE release 4.5.
3721 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3722 remained set. It is now erased.
3724 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3725 times from message ids (which are base 36 rather than the normal 62).
3727 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3728 were being counted as actual protocol errors, and logged if the log
3729 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3730 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3731 and DATA following a set of rejected RCPTs do not count as protocol errors.
3732 In other words, Exim assumes they were pipelined, though this may not
3733 actually be the case. Of course, in all cases the client gets an
3734 appropriate error code.
3736 15. If a lookup fails in an ACL condition, a message about the failure may
3737 be available; it is used if testing the ACL cannot continue, because most
3738 such messages specify what the cause of the deferral is. However, some
3739 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3740 that caused an old message to be retained and used if a later statement
3741 caused a defer, replacing the real cause of the deferral.
3743 16. If an IP address had so many PTR records that the DNS lookup buffer
3744 was not large enough to hold them, Exim could crash while trying to process
3745 the truncated data. It now detects and logs this case.
3747 17. Further to 4.21/58, another change has been made: if (and only if) the
3748 first line of a message (the first header line) ends with CRLF, a bare LF
3749 in a subsequent header line has a space inserted after it, so as not to
3750 terminate the header.
3752 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3753 unnecessarily, used atoi() instead of strtol(), and didn't check the
3754 termination when getting file sizes from file names by regex.
3756 19. Completely re-implemented the support for maildirsize files, in the light
3757 of a number of problems with the previous contributed implementation
3758 (4.30/29). In particular:
3760 . If the quota is zero, the maildirsize file is maintained, but no quota is
3763 . If the maildir directory does not exist, it is created before any attempt
3764 to write a maildirsize file.
3766 . The quota value in the file is just a cache; if the quota is changed in
3767 the transport, the new value overrides.
3769 . A regular expression is available for excluding directories from the
3772 20. The autoreply transport checks the characters in options that define the
3773 message's headers; it allows continued headers, but it was checking with
3774 isspace() after an embedded newline instead of explicitly looking for a
3777 21. If all the "regular" hosts to which an address was routed had passed their
3778 expiry times, and had not reached their retry times, the address was
3779 bounced, even if fallback hosts were defined. Now Exim should go on to try
3782 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3783 equivalent code in the SMTP transport. Some hosts send humungous responses
3784 to HELO/EHLO, more than 1024 it seems.
3786 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3787 gives compiler warnings in some environments. I've now done it "properly",
3790 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3791 (because of problems with the built-in one) was declared to return uschar *
3792 instead of char *, causing compiler failure.
3794 25. Fixed a file descriptor leak when processing alias/forward files.
3796 26. Fixed a minor format string issue in dbfn.c.
3798 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3800 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3801 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3804 29. When a sender address is verified, it is cached, to save repeating the test
3805 when there is more than one recipient in a message. However, when the
3806 verification involves a callout, it is possible for different callout
3807 options to be set for different recipients. It is too complicated to keep
3808 track of this in the cache, so now Exim always runs a verification when a
3809 callout is required, relying on the callout cache for the optimization.
3810 The overhead is duplication of the address routing, but this should not be
3813 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3814 to be verified with callout=postmaster, and the main callout worked but the
3815 postmaster check failed, the verification correctly failed. However, if a
3816 subsequent RCPT command asked for sender verification *without* the
3817 postmaster check, incorrect caching caused this verification also to fail,
3820 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3821 it was not caching the DNS options (qualify_single, search_parents) that
3822 were used when the lookup failed. A subsequent lookup with different
3823 options therefore always gave the same answer, though there were cases
3824 where it should not have. (Example: a "domains = !$mx_any" option on a
3825 dnslookup router: the "domains" option is always processed without any
3826 widening, but the router might have qualify_single set.) Now Exim uses the
3827 cached value only when the same options are set.
3829 32. Added John Jetmore's "exipick" utility to the distribution.
3831 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3832 than a timeout (e.g. a certificate is required, and is not provided), an
3833 Exim server now closes the connection immediately. Previously it waited for
3834 the client to close - but if the client is SSL, it seems that they each
3835 wait for each other, leading to a delay before one of them times out.
3837 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3838 maintained 0.8.x compatibility because I don't think many are using it, and
3839 it is clearly obsolete.
3841 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3844 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3845 client certificate was expired. A simple patch fixes this, though I don't
3846 understand the full logic of why the verify callback is called multiple
3849 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3850 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3851 which causes problems with some clients (such as the Certicom SSL Plus
3852 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3853 disables the coutermeasure allowing Eudora to connect."
3855 38. Exim was not checking that a write() to a log file succeeded. This could
3856 lead to Bad Things if a log got too big, in particular if it hit a file
3857 size limit. Exim now panics and dies if it cannot write to a log file, just
3858 as it does if it cannot open a log file.
3860 39. Modified OS/Makefile-Linux so that it now contains
3862 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3864 The two -D definitions ensure that Exim is compiled with large file
3865 support, which makes it possible to handle log files that are bigger than
3868 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3869 instance) a domain was checked against a named list that involved a lookup,
3870 causing $domain_data to be set, then another domain was checked against the
3871 same list, then the first domain was re-checked, the value of $domain_data
3872 after the final check could be wrong. In particular, if the second check
3873 failed, it could be set empty. This bug probably also applied to
3876 41. The strip_trailing_dot option was not being applied to the address given
3877 with the -f command-line option.
3879 42. The code for reading a message's header from the spool was incrementing
3880 $received_count, but never initializing it. This meant that the value was
3881 incorrect (doubled) while delivering a message in the same process in which
3882 it was received. In the most common configuration of Exim, this never
3883 happens - a fresh exec is done - but it can happen when
3884 deliver_drop_privilege is set.
3886 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3887 it now includes up to 150 characters of the unexpected data in the log
3890 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3891 and building data strings. The size of both of these buffers was 10 000
3892 bytes - far larger than anybody would *ever* want, thought I. Needless to
3893 say, somebody hit the limit. I have increased the maximum line length to
3894 20 000 and the maximum data length of concatenated lines to 100 000. I have
3895 also fixed two bugs, because there was no checking on these buffers. Tsk,
3896 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3897 buffer is too small.
3899 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3900 lsearch lookups. Now it does.
3902 46. When parsing a route_list item in a manualroute router, a fixed-length
3903 buffer was used for the list of hosts. I made this 1024 bytes long,
3904 thinking that nobody would ever have a list of hosts that long. Wrong.
3905 Somebody had a whole pile of complicated expansion conditions, and the
3906 string was silently truncated, leading to an expansion error. It turns out
3907 that it is easier to change to an unlimited length (owing to other changes
3908 that have happened since this code was originally written) than to build
3909 structure for giving a limitation error. The length of the item that
3910 expands into the list of hosts is now unlimited.
3912 47. The lsearch lookup could not handle data where the length of text line was
3913 more than 4095 characters. Such lines were truncated, leading to shortened
3914 data being returned. It should now handle lines of any length.
3916 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3917 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3920 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3921 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3922 no longer happens in comment lines. A list of replacements is now placed
3923 at the head of all of the source files, except those whose only change is
3924 to replace PERL_COMMAND in the very first #! line.
3926 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3927 messages on the queue, with a bottom-up merge sort, using code contributed
3928 by Michael Haardt. This should make operations like -bp somewhat faster on
3929 large queues. It won't affect queue runners, except when queue_run_in_order
3932 51. Installed eximstats 1.31 in the distribution.
3934 52. Added support for SRV lookups to the dnslookup router.
3936 53. If an ACL referred to $message_body or $message_body_end, the value was not
3937 reset for any messages that followed in the same SMTP session.
3939 54. The store-handling optimization for building very long strings was not
3940 differentiating between the different store pools. I don't think this
3941 actually made any difference in practice, but I've tidied it.
3943 55. While running the routers to verify a sender address, $sender_address
3944 was still set to the sender address. This is wrong, because when routing to
3945 send a bounce to the sender, it would be empty. Therefore, I have changed
3946 it so that, while verifying a sender address, $sender_address is set to <>.
3947 (There is no change to what happens when verifying a recipient address.)
3949 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3950 target A or AAAA records (if not already returned) without resetting the
3951 qualify_single or search_parents options of the DNS resolver. These are
3952 inappropriate in this case because the targets of MX and SRV records must
3953 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3954 target that, when qualified, matched something in the local domain. These
3955 two options are now turned off when doing these lookups.
3957 57. It seems that at least some releases of Reiserfs (which does not have the
3958 concept of a fixed number of inodes) returns zero and not -1 for the
3959 number of available inodes. This interacted badly with check_spool_inodes,
3960 which assumed that -1 was the "no such thing" setting. What I have done is
3961 to check that the total number of inodes is greater than zero before doing
3962 the test of how many are available.
3964 58. When a "warn" ACL statement has a log_message modifier, the message is
3965 remembered, and not repeated. This is to avoid a lot of repetition when a
3966 message has many recipients that cause the same warning to be written.
3967 Howewer, Exim was preserving the list of already written lines for an
3968 entire SMTP session, which doesn't seem right. The memory is now reset if a
3969 new message is started.
3971 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3972 debugging output unless log_rewrite was also set.
3974 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3975 of (int)(handle) when we know that handle contains (void *)(-1).
3977 61. The Exim daemon panic-logs an error return when it closes the incoming
3978 connection. However "connection reset by peer" seems to be common, and
3979 isn't really an error worthy of noting specially, so that particular error
3982 62. When Exim is trying to find all the local interfaces, it used to panic and
3983 die if the ioctl to get the interface flags failed. However, it seems that
3984 on at least one OS (Solaris 9) it is possible to have an interface that is
3985 included in the list of interfaces, but for which you get a failure error
3986 for this call. This happens when the interface is not "plumbed" into a
3987 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3988 failure of the "get flags" call assumes that the interface is down.
3990 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3991 makes life easier for people who are doing arithmetic on fields extracted
3992 from dates, where you often get leading zeros that should not be
3993 interpreted as octal.
3995 64. Added qualify_domain to the redirect router, to override the global
3998 65. If a pathologically long header line contained very many addresses (the
3999 report of this problem mentioned 10 000) and each of them was rewritten,
4000 Exim could use up a very large amount of memory. (It kept on making new
4001 copies of the header line as it rewrote, and never released the old ones.)
4002 At the expense of a bit more processing, the header rewriting function has
4003 been changed so that it no longer eats memory in this way.
4005 66. The generation of the Received: header has been moved from the time that a
4006 message starts to be received, to the time that it finishes. The timestamp
4007 in the Received: header should now be very close to that of the <= log
4008 line. There are two side-effects of this change:
4010 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4011 logged header lines no longer include the local Received: line, because
4012 it has not yet been created. The same applies to a copy of the message
4013 that is returned to a non-SMTP sender when a message is rejected.
4015 (b) When a filter file is tested using -bf, no additional Received: header
4016 is added to the test message. After some thought, I decided that this
4019 This change does not affect the value of $received_for. It is still set
4020 after address rewriting, but before local_scan() is called.
4022 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4024 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4025 gave an unhelpful panic error message, and a defer error. I have managed to
4026 change this behaviour so that it now rejects any supplied certificate,
4027 which seems right, as the list of acceptable certificates is empty.
4029 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4030 gave an unhelpful defer error. I have not managed to make this reject any
4031 supplied certificates, but the error message it gives is "no certificate
4032 supplied", which is not helpful.
4034 70. exigrep's output now also includes lines that are not associated with any
4035 message, but which match the given pattern. Implemented by a patch from
4036 Martin Sluka, which also tidied up the Perl a bit.
4038 71. Recipient callout verification, like sender verification, was using <> in
4039 the MAIL FROM command. This isn't really the right thing, since the actual
4040 sender may affect whether the remote host accepts the recipient or not. I
4041 have changed it to use the actual sender in the callout; this means that
4042 the cache record is now keyed on a recipient/sender pair, not just the
4043 recipient address. There doesn't seem to be a real danger of callout loops,
4044 since a callout by the remote host to check the sender would use <>.
4045 [SEE ABOVE: changed after hitting problems.]
4047 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4048 temporary errors. However, in the case of such a code being given after
4049 the end of a data transmission (i.e. after ".") Exim was failing to write
4050 a retry record for the message. (Yes, there was some broken host that was
4051 actually sending 8xx at this point.)
4053 73. An unknown lookup type in a host list could cause Exim to panic-die when
4054 the list was checked. (An example that provoked this was putting <; in the
4055 middle of a list instead of at the start.) If this happened during a DATA
4056 ACL check, a -D file could be left lying around. This kind of configuration
4057 error no longer causes Exim to die; instead it causes a defer errror. The
4058 incident is still logged to the main and panic logs.
4060 74. Buglet left over from Exim 3 conversion. The message "too many messages
4061 in one connection" was written to the rejectlog but not the mainlog, except
4062 when address rewriting (yes!) was being logged.
4064 75. Added write_rejectlog option.
4066 76. When a system filter was run not as root (that is, when system_filter_user
4067 was set), the values of the $n variables were not being returned to the
4068 main process; thus, they were not subsequently available in the $sn
4071 77. Added +return_path_on_delivery log selector.
4073 78. A connection timeout was being treated differently from recipients deferred
4074 when testing hosts_max_try with a message that was older than the host's
4075 retry timeout. (The host should not be counted, thus allowing all hosts to
4076 be tried at least once before bouncing.) This may have been the cause of an
4077 occasionally reported bug whereby a message would remain on the queue
4078 longer than the retry timeout, but would be bounced if a delivery was
4079 forced. I say "may" because I never totally pinned down the problem;
4080 setting up timeout/retry tests is difficult. See also the next item.
4082 79. The ultimate address timeout was not being applied to errors that involved
4083 a combination of host plus message (for example, a timeout on a MAIL
4084 command). When an address resolved to a number of possible hosts, and they
4085 were not all tried for each delivery (e.g. because of hosts_max_try), a
4086 message could remain on the queue longer than the retry timeout.
4088 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4091 81. Fixed an obscure SMTP outgoing bug which required at least the following
4092 conditions: (a) there was another message waiting for the same server;
4093 (b) the server returned 5xx to all RCPT commands in the first message so
4094 that the message was not completed; (c) the server dropped the connection
4095 or gave a negative response to the RSET that Exim sends to abort the
4096 transaction. The observed case was a dropped connection after DATA that had
4097 been sent in pipelining mode. That is, the server had advertised PIPELINING
4098 but was not implementing it correctly. The effect of the bug was incorrect
4099 behaviour, such as trying another host, and this could lead to a crash.
4105 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4106 and daemon.c were passed as pointers to ints; they should have been
4107 pointers to socklen_t variables (which are typically unsigned ints).
4109 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4112 3. Fixed a really odd bug that affected only the testing scheme; patching a
4113 certain fixed string in the binary changed the value of another string that
4114 happened to be identical to the end of the original first string.
4116 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4117 name", it returns that address as the IP address. On some operating
4118 systems (e.g. Solaris), it also passes back the IP address string as the
4119 "host name". However, on others (e.g. Linux), it passes back an empty
4120 string. Exim wasn't checking for this, and was changing the host name to an
4121 empty string, assuming it had been canonicized.
4123 5. Although rare, it is permitted to have more than one PTR record for a given
4124 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4125 all the names associated with an address, because they do in Solaris.
4126 However, it seems that they do not in Linux for data that comes from the
4127 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4128 I found this out when I moved to a new Linux workstation and tried to run
4129 the Exim test suite.
4131 To get round this problem I have changed the code so that it now does its
4132 own call to the DNS to look up PTR records when searching for a host name.
4133 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4134 addresses that are only in /etc/hosts are still found.
4136 This behaviour is, however, controlled by an option called host_lookup_
4137 order, which defaults to "bydns:byaddr". If people want to use the other
4138 order, or indeed, just use one or the other means of lookup, they can
4139 specify it in this variable.
4141 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4142 some operating systems, this comes back from gethostbyaddr() as an empty
4143 string, and this is what Exim used to test for. However, it seems that in
4144 other systems, "." is yielded. Exim now tests for this case too.
4146 7. The values of check_spool_space and check_log_space are now held internally
4147 as a number of kilobytes instead of an absolute number of bytes. If a
4148 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4149 kilobyte. This means that much larger values can be stored.
4151 8. Exim monitor: an attempt to get the action menu when not actually pointing
4152 at a message produces an empty menu entitled "No message selected". This
4153 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4154 no entries in it ("Shell widget menu has zero width and/or height"). So I
4155 have added a single, blank menu entry in this case.
4157 9. Added ${quote_local_part.
4159 10. MIME decoding is now applied to the contents of Subject: header lines when
4162 11. Now that a reference to $sender_host_address automatically causes a reverse
4163 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4164 host lookup before query-style lookups in lists that might use this
4165 variable. This has therefore been abolished, and the "net-" prefix is no
4166 longer necessary for query-style lookups.
4168 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4169 have been a typo for LFLAGS, so it has been changed.
4171 13. The install script calls Exim with "-C /dev/null" in order to find the
4172 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4173 to be output. Howeve, since Exim outputs its version number before the
4174 error, it didn't break the script. It just looked ugly. I fixed this by
4175 always allowing "-C /dev/null" if the caller is root.
4177 14. Ignore overlarge ACL variable number when reading spool file - insurance
4178 against a later release with more variables having written the file.
4180 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4181 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4182 this, as well as the form without the "IPv6" on the front.
4184 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4185 OS/Makefile-Darwin file.
4187 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4188 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4190 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4191 variable. However, some OS use ints for inodes. I've added cast to long int
4192 to get rid of the compiler warning.
4194 19. I had forgotten to lock out "/../" in configuration file names when
4195 ALT_CONFIG_PREFIX was set.
4197 20. Routers used for verification do not need to specify transports. However,
4198 if such a router generated a host list, and callout was configured, Exim
4199 crashed, because it could not find a port number from the (non-existent)
4200 transport. It now assumes port 25 in this circumstance.
4202 21. Added the -t option to exigrep.
4204 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4205 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4206 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4207 them is set, LOOKUP_LSEARCH is forced.
4209 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4211 24. Added sender and host information to the "rejected by local_scan()" log
4212 line; previously there was no indication of these.
4214 25. Added .include_if_exists.
4216 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4217 Linux. It turns out that not all file systems support this. Apparently some
4218 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4219 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4220 not supported on the file descriptor, is now ignored when Exim is trying to
4221 sync a directory. This applies only to Linux.
4223 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4225 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4226 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4229 29. Added support for maildirsize files from supplied patch (modified a bit).
4231 30. The use of :fail: followed by an empty string could lead Exim to respond to
4232 sender verification failures with (e.g.):
4234 550 Verification failed for <xxx>
4235 550 Sender verify failed
4237 where the first response line was missing the '-' that indicates it is not
4238 the final line of the response.
4240 31. The loop for finding the name of the user that called Exim had a hardwired
4241 limit of 10; it now uses the value of finduser_retries, which is used for
4242 all other user lookups.
4244 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4247 33. Exim was neglecting to zero errno before one call of strtol() when
4248 expanding a string and expecting an integer value. On some systems this
4249 resulted in spurious "integer overflow" errors. Also, it was casting the
4250 result into an int without checking.
4252 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4253 did not work. The code looks as if it has *never* worked, though it appears
4254 to have been documented since at least releast 1.62. I have made it work.
4256 35. The "timeout_DNS" error in retry rules, also documented since at least
4257 1.62, also never worked. As it isn't clear exactly what this means, and
4258 clearly it isn't a major issue, I have abolished the feature by treating it
4259 as "timeout", and writing a warning to the main and panic logs.
4261 36. The display of retry rules for -brt wasn't always showing the error code
4264 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4265 timeout_connect_A, timeout_connect_MX.
4267 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4268 to the empty sender.
4270 39. The daemon was not analysing the content of -oX till after it had closed
4271 stderr and disconnected from the controlling terminal. This meant that any
4272 syntax errors were only noted on the panic log, and the return code from
4273 the command was 0. By re-arranging the code a little, I've made the
4274 decoding happen first, so such errors now appear on stderr, and the return
4275 code is 1. However, the actual setting up of the sockets still happens in
4276 the disconnected process, so errors there are still only recorded on the
4279 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4280 connections (as happens on some IP stacks) was logged at start up time as
4281 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4282 it from "IPv6 and IPv4", which means that two separate sockets are being
4285 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4286 says whether AF_INET or AF_INET6 was passed as an argument.
4288 42. Exiwhat output was messed up when time zones were included in log
4291 43. Exiwhat now gives more information about the daemon's listening ports,
4292 and whether -tls-on-connect was used.
4294 44. The "port" option of the smtp transport is now expanded.
4296 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4297 silently ignored. Now an error message is written to the main and panic
4300 46. There's a new ACL modifier called "logwrite" which writes to a log file
4301 as soon as it is encountered.
4303 47. Added $local_user_uid and $local_user_gid at routing time.
4305 48. Exim crashed when trying to verify a sender address that was being
4308 49. Exim was recognizing only a space character after ".include". It now also
4309 recognizes a tab character.
4311 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4312 extracting the relevant information from the specification. The man page no
4313 longer contains scrambled data for the -d option, and I've added a section
4314 at the front about calling Exim under different names.
4316 51. Added "extra_headers" argument to the "mail" command in filter files.
4318 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4321 53. Installed eximstats 1.29.
4323 54. Added transport_filter_timeout as a generic transport option.
4325 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4326 Cc: header lines. This was required by RFC 822, but it not required by RFC
4329 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4330 incoming messages that did not have them. Now it does so only if the
4331 message originates locally, that is, if there is no associated remote host
4332 address. When Resent- header lines are present, this applies to the Resent-
4333 lines rather than the non-Resent- lines.
4335 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4336 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4338 58. Messages for configuration errors now include the name of the main
4339 configuration file - useful now that there may be more than one file in a
4340 list (.included file names were always shown).
4342 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4343 for those rare installations that do not start the daemon as root or run it
4344 setuid root. I've cut out the call to initgroups() if the daemon is not
4347 60. The Exim user and group can now be bound into the binary as text strings
4348 that are looked up at the start of Exim's processing.
4350 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4352 62. Added $mailstore_basename variable.
4354 63. Installed patch to sieve.c from Michael Haardt.
4356 64. When Exim failed to open the panic log after failing to open the main log,
4357 the original message it was trying to log was written to stderr and debug
4358 output, but if they were not available (the usual case in production), it
4359 was lost. Now it is written to syslog before the two lines that record the
4360 failures to open the logs.
4362 65. Users' Exim filters run in subprocesses under the user's uid. It is
4363 possible for a "deliver" command or an alias in a "personal" command to
4364 provoke an address rewrite. If logging of address rewriting is configured,
4365 this fails because the process is not running as root or exim. There may be
4366 a better way of dealing with this, but for the moment (because 4.30 needs
4367 to be released), I have disabled address rewrite logging when running a
4368 filter in a non-root, non-exim process.
4374 1. The buildconfig auxiliary program wasn't quoting the value set for
4375 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4376 not defined. This bug was masked in 4.22 by the effect that was fixed in
4379 2. Some messages that were rejected after a message id was allocated were
4380 shown as "incomplete" by exigrep. It no longer does this for messages that
4381 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4383 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4384 have allow_domain_literals set, the ID did not get logged in the <= line.
4385 Domain literals are now always recognized in Message-ID: header lines.
4387 4. The first argument for a ${extract expansion item is the key name or field
4388 number. Leading and trailing spaces in this item were not being ignored,
4389 causing some misleading effects.
4391 5. When deliver_drop_privilege was set, single queue runner processes started
4392 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4393 same command in the process it spins off) were not dropping privilege.
4395 6. When the daemon running as "exim" started a queue runner, it always
4396 re-executed Exim in the spun-off process. This is a waste of effort when
4397 deliver_drop_privilege is set. The new process now just calls the
4398 queue-runner function directly.
4404 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4407 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4408 ignored. Though the use of -oP was forcing the writing of a pid file, it
4409 was always written to the default place.
4411 3. If the message "no IP address found for host xxxx" is generated during
4412 incoming verification, it is now followed by identification of the incoming
4413 connection (so you can more easily find what provoked it).
4415 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4417 5. Added some features to "harden" Exim a bit more against certain attacks:
4419 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4420 be put in Local/Makefile. This is like the never_users runtime option,
4421 but it cannot be overridden. The default setting is "root".
4423 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4424 prefix string with which any file named in a -C command line option
4427 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4428 is retained for -C and -D only if the caller of Exim is root. Without
4429 it, the exim user may also use -C and -D and retain privilege.
4431 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4432 command line option is disabled.
4434 6. Macro names set by the -D option must start with an upper case letter, just
4435 like macro names defined in the configuration file.
4437 7. Added "dereference=" facility to LDAP.
4439 8. Two instances of the typo "uknown" in the source files are fixed.
4441 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4442 the Configure-Makefile script screwed up while processing it.
4444 10. Incorporated PCRE 4.4.
4446 11. The SMTP synchronization check was not operating right at the start of an
4447 SMTP session. For example, it could not catch a HELO sent before the client
4448 waited for the greeting. There is now a check for outstanding input at the
4449 point when the greeting is written. Because of the duplex, asynchronous
4450 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4451 way, but not yet received, when the check is performed.
4453 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4454 on TCP/IP sockets, because this apparently causes some broken clients to
4457 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4458 unchanged) from the Cygwin maintainer.
4460 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4461 was supported instead of testing for mbx. Effectively a typo.
4463 15. The spa authenticator server code was not checking that the input it
4464 received was valid base64.
4466 16. The debug output line for the "set" modifier in ACLs was not showing the
4467 name of the variable that was being set.
4469 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4471 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4472 lookup on its own. Something else was needed to trigger the lookup. For
4473 example, a match in host_lookup or the need for a host name in a host list.
4474 Now, if $sender_host_name is referenced and the host name has not yet been
4475 looked up, a lookup is performed. If the lookup fails, the variable remains
4476 empty, and $host_lookup_failed is set to "1".
4478 19. Added "eqi" as a case-independent comparison operator.
4480 20. The saslauthd authentication condition could segfault if neither service
4481 nor realm was specified.
4483 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4484 error message that was logged was misleading, and incoming SMTP
4485 connections were dropped. The message is now more accurate, and temporary
4486 errors are given to SMTP connections.
4488 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4489 (except RSET) with a 421 error, until QUIT is received. However, it was
4490 failing to send a response to QUIT.
4492 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4493 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4494 ACL is now run after the helo_try_verify_hosts code.
4496 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4497 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4498 case-independent, so other case variants are also recognized). Apparently
4499 some systems use these upper case variants.
4501 25. If more than two messages were waiting for the same host, and a transport
4502 filter was specified for the transport, Exim sent two messages over the
4503 same TCP/IP connection, and then failed with "socket operation on non-
4504 socket" when it tried to send the third.
4506 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4508 27. The extern definition of crypt16() in expand.c was not being excluded when
4509 the OS had its own crypt16() function.
4511 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4512 as a preferred synonym for return_size_limit, both as an option and as an
4515 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4517 30. Changed the default configuration ACL to relax the local part checking rule
4518 for addresses that are not in any local domains. For these addresses,
4519 slashes and pipe symbols are allowed within local parts, but the sequence
4520 /../ is explicitly forbidden.
4522 31. SPA server authentication was not clearing the challenge buffer before
4525 32. log_message in a "warn" ACL statement was writing to the reject log as
4526 well as to the main log, which contradicts the documentation and doesn't
4527 seem right (because no rejection is happening). So I have stopped it.
4529 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4530 However, I am unable to do any testing of this.
4532 34. Fixed an infelicity in the appendfile transport. When checking directories
4533 for a mailbox, to see if any needed to be created, it was accidentally
4534 using path names with one or more superfluous leading slashes; tracing
4535 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4537 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4538 contents are added to the log line that is written for every discarded
4539 recipient. (Previously a log_message setting was ignored.)
4541 36. The ${quote: operator now quotes the string if it is empty.
4543 37. The install script runs exim in order to find its version number. If for
4544 some reason other than non-existence or emptiness, which it checks, it
4545 could not run './exim', it was installing it with an empty version number,
4546 i.e. as "exim-". This error state is now caught, and the installation is
4549 38. An argument was missing from the function that creates an error message
4550 when Exim fails to connect to the socket for saslauthd authentication.
4551 This could cause Exim to crash, or give a corrupted message.
4553 39. Added isip, isip4, and isip6 to ${if conditions.
4555 40. The ACL variables $acl_xx are now saved with the message, and can be
4556 accessed later in routers, transports, and filters.
4558 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4559 strings in the file are not string-expanded.
4561 42. If a MAIL command specified a SIZE value that was too large to fit into an
4562 int variable, the check against message_size_limit failed. Such values are
4563 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4564 day this will have to be increased, but I don't think I want to be around
4565 when emails are that large.
4572 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4573 iconv() is not standard in FreeBSD.
4575 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4576 IPv6 enabled. The observed symptom was a segmentation fault on return from
4577 the function os_common_find_running_interfaces() in src/os.c.
4579 3. In the check_special_case() function in daemon.c I had used "errno" as an
4580 argument name, which causes warnings on some systems. This was basically a
4581 typo, since it was named "eno" in the comments!
4583 4. The code that waits for the clock to tick (at a resolution of some fraction
4584 of a second) so as to ensure message-id uniqueness was always waiting for
4585 at least one whole tick, when it could have waited for less. [This is
4586 almost certainly not relevant at current processor speeds, where it is
4587 unlikely to ever wait at all. But we try to future-proof.]
4589 5. The function that sleeps for a time interval that includes fractions of a
4590 second contained a race. It did not block SIGALRM between setting the
4591 timer, and suspending (a couple of lines later). If the interval was short
4592 and the sigsuspend() was delayed until after it had expired, the suspension
4593 never ended. On busy systems this could lead to processes getting stuck for
4596 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4597 process, before it forks any delivery processes. The open lookup caching
4598 mechanism meant that the open file or database connection was passed into
4599 the delivery process. The problem was that delivery processes always tidy
4600 up cached lookup data. This could cause a problem for the next delivery
4601 process started by the queue runner, because the external queue runner
4602 process does not know about the closure. So the next delivery process
4603 still has data in the lookup cache. In the case of a file lookup, there was
4604 no problem because closing a file descriptor in a subprocess doesn't affect
4605 the parent. However, if the lookup was caching a connection to a database,
4606 the connection was closed, and the second delivery process was likely to
4607 see errors such as "PGSQL: query failed: server closed the connection
4608 unexpectedly". The problem has been fixed by closing all cached lookups
4609 in a queue runner before running a delivery process.
4611 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4612 seem to have the "const" qualifier which it has on other OS. I've
4615 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4616 *of the same type* (client or server) with the same public name that an
4617 error should be diagnosed.
4619 9. When Exim looked up a host name for an IP address, but failed to find the
4620 original IP address when looking up the host name (a safety check), it
4621 output the message "<ip address> does not match any IP for NULL", which was
4622 confusing, to say the least. The bug was that the host name should have
4623 appeared instead of "NULL".
4625 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4626 user that is built into the binary, and the -C or -D options is used, root
4627 privilege is dropped before the configuration file is read. In addition,
4628 logging is switched to stderr instead of the normal log files. If the
4629 configuration then re-defines the Exim user, the unprivileged environment
4630 is probably not what is expected, so Exim logs a panic warning message (but
4633 However, if deliver_drop_privilege is set, the unprivileged state may well
4634 be exactly what is intended, so the warning has been cut out in that case,
4635 and Exim is allowed to try to write to its normal log files.
4641 1. smtp_return_error_details was not giving details for temporary sender
4642 or receiver verification errors.
4644 2. Diagnose a configuration error if two authenticators have the same public
4647 3. Exim used not to create the message log file for a message until the first
4648 delivery attempt. This could be confusing when incoming messages were held
4649 for policy or load reasons. The message log file is now created at the time
4650 the message is received, and an initial "Received" line is written to it.
4652 4. The automatically generated man page for command line options had a minor
4653 bug that caused no ill effects; however, a more serious problem was that
4654 the procedure for building the man page automatically didn't always
4655 operate. Consequently, release 4.20 contains an out-of-date version. This
4656 shouldn't happen again.
4658 5. When building Exim with embedded Perl support, the script that builds the
4659 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4660 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4662 6. The freeze_tell option was not being used for messages that were frozen on
4663 arrival, either by an ACL or by local_scan().
4665 7. Added the smtp_incomplete_transaction log selector.
4667 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4668 was accepting AUTH without a new EHLO.
4670 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4671 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4674 10. Logging of TCP/IP connections (when configured) now happens in the main
4675 daemon process instead of the child process, so that the TCP/IP connection
4676 count is more accurate (but it can never be perfect).
4678 11. The use of "drop" in a nested ACL was not being handled correctly in the
4679 outer ACL. Now, if condition failure induced by the nested "drop" causes
4680 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4681 or "require"), the connection is dropped.
4683 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4684 that yield "discard" can now be used with an "accept" or a "discard" verb,
4685 but an error is generated for any others (because I can't see a useful way
4686 to define what should happen).
4688 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4689 are now processed in the same way as lines in the Exim configuration file.
4690 In particular, continuation lines are supported.
4692 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4694 15. Added -ti meaning -t -i.
4696 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4697 domains, and warn by logging if others are found.
4699 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4700 returned from GIFCONF when Exim is trying to find the list of interfaces on
4701 a host. The code in os.c has been modified to copy each ifreq to an aligned
4702 structure in all cases.
4704 Also, in some cases, the returned ifreq's were being copied to a 'struct
4705 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4706 means the last couple of bytes of an IPv6 address could be chopped if the
4707 ifreq contained only a normal sockaddr (14 bytes storage).
4709 18. Named domain lists were not supported in the hosts_treat_as_local option.
4710 An entry such as +xxxx was not recognized, and was treated as a literal
4713 19. Ensure that header lines added by a DATA ACL are included in the reject log
4714 if the ACL subsequently rejects the message.
4716 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4717 MD5 (which is deprecated).
4719 21. When testing a filter file using -bf, Exim was writing a message when it
4720 took the sender from a "From " line in the message, but it was not doing so
4721 when it took $return_path from a Return-Path: header line. It now does.
4723 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4724 with a valid header line field name (a series of printing characters
4725 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4727 23. Changed "disc" in the source to "disk" to conform to the documentation and
4728 the book and for uniformity.
4730 24. Ignore Sendmail's -Ooption=value command line item.
4732 25. When execve() failed while trying to run a command in a pipe transport,
4733 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4734 could be confused with a return value of 69 from the command itself. This
4735 has been changed to 127, the value the shell returns if it is asked to run
4736 a non-existent command. The wording for the related log line suggests a
4737 non-existent command as the problem.
4739 26. If received_header_text expands to an empty string, do not add a Received:
4740 header line to the message. (Well, it adds a token one on the spool, but
4741 marks it "old" so that it doesn't get used or transmitted.)
4743 27. Installed eximstats 1.28 (addition of -nt option).
4745 28. There was no check for failure on the call to getsockname() in the daemon
4746 code. This can fail if there is a shortage of resources on the system, with
4747 ENOMEM, for example. A temporary error is now given on failure.
4749 29. Contrary to the C standard, it seems that in some environments, the
4750 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4751 program. Exim now does this explicitly; it affects the formatting of
4752 timestamps using strftime().
4754 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4755 complaints. I've now initialized all the variables, to avoid this.
4757 32. Header lines added by a system filter were not being "seen" during
4758 transport-time rewrites.
4760 33. The info_callback() function passed to OpenSSL is set up with type void
4761 (*)(SSL *, int, int), as described somewhere. However, when calling the
4762 function (actually a macro) that sets it up, the type void(*)() is
4763 expected. I've put in a cast to prevent warnings from picky compilers.
4765 34. If a DNS black list lookup found a CNAME record, but there were no A
4766 records associated with the domain it pointed at, Exim crashed.
4768 35. If a DNS black list lookup returned more than one A record, Exim ignored
4769 all but the first. It now scans all returned addresses if a particular IP
4770 value is being sought. In this situation, the contents of the
4771 $dnslist_value variable are a list of all the addresses, separated by a
4774 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4775 to accept a host name and all its aliases if the forward lookup for any of
4776 them yielded the IP address of the incoming connection. Now it accepts only
4777 those names whose forward lookup yields the correct IP address. Any other
4778 names are discarded. This closes a loophole whereby a rogue DNS
4779 administrator could create reverse DNS records to break through a
4780 wildcarded host restriction in an ACL.
4782 37. If a user filter or a system filter that ran in a subprocess used any of
4783 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4784 the wrong values were passed to the pipe command ($thisaddress had the
4785 value of $0, $0 had the value of $1, etc). This bug was introduced by
4786 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4788 38. Improved the line breaking for long SMTP error messages from ACLs.
4789 Previously, if there was no break point between 40 and 75 characters, Exim
4790 left the rest of the message alone. Two changes have been made: (a) I've
4791 reduced the minimum length to 35 characters; (b) if it can't find a break
4792 point between 35 and 75 characters, it looks ahead and uses the first one
4793 that it finds. This may give the occasional overlong line, but at least the
4794 remaining text gets split now.
4796 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4797 file descriptors might be low, and that setting 1000 would always raise it.
4798 It turns out that in some environments, the limit is already over 1000 and
4799 that lowering it causes trouble. So now Exim takes care not to decrease it.
4801 40. When delivering a message, the value of $return_path is set to $sender_
4802 address at the start of routing (routers may change the value). By an
4803 oversight, this default was not being set up when an address was tested by
4804 -bt or -bv, which affected the outcome if any router or filter referred to
4807 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4808 log only when "message" or "log_message" are set. However, if one of the
4809 conditions was an address verification, or a call to a nested ACL, the
4810 messages generated by the underlying test were being passed through. This
4811 no longer happens. The underlying message is available in $acl_verify_
4812 message for both "message" and "log_message" expansions, so it can be
4813 passed through if needed.
4815 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4816 new expansion $bh_ to give the encoded byte string without charset
4817 translation. Translation happens only if iconv() is available; HAVE_ICONV
4818 indicates this at build time. HEADERS_CHARSET gives the charset to
4819 translate to; headers_charset can change it in the configuration, and
4820 "headers charset" can change it in an individual filter file.
4822 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4823 that creates RFC 2047 encoded "words" labels them as that charset instead
4824 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4825 expansion operator; (ii) when Exim creates a From: line for a local
4826 message; (iii) when a header line is rewritten to include a "phrase" part.
4828 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4829 buggy, causing it to skip the first lines of messages whose message ID
4830 ended in 'D'. This would not have bitten before Exim release 4.14, because
4831 message IDs were unlikely to end in 'D' before then. The effect was to have
4832 incorrect size information for certain domains.
4834 45. #include "config.h" was missing at the start of the crypt16.c module. This
4835 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4838 46. If there was a timeout during a "random" callout check, Exim treated it as
4839 a failure of the random address, and carried on sending RSET and the real
4840 address. If the delay was just some slowness somewhere, the response to the
4841 original RCPT would be taken as a response to RSET and so on, causing
4842 mayhem of various kinds.
4844 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4845 when I implemented it. It didn't allow for the fact that some option values
4846 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4847 the right test for positive values.
4849 48. Domain names in DNS records are case-independent. Exim always looks them up
4850 in lower case. Some resolvers return domain names in exactly the case they
4851 appear in the zone file, that is, they may contain uppercase letters. Not
4852 all resolvers do this - some return always lower case. Exim was treating a
4853 change of case by a resolver as a change of domain, similar to a widening
4854 of a domain abbreviation. This triggered its re-routing code and so it was
4855 trying to route what was effectively the same domain again. This normally
4856 caused routing to fail (because the router wouldn't handle the domain
4857 twice). Now Exim checks for this case specially, and just changes the
4858 casing of the domain that it ultimately uses when it transmits the message
4861 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4864 50. If a filter generated a file delivery with a non-absolute name (possible if
4865 no home directory exists for the router), the forbid_file option was not
4868 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4869 the existing equality matching.
4871 52. Exim was using ints instead of ino_t variables in some places where it was
4872 dealing with inode numbers.
4874 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4875 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4876 called TMPDIR, and if it finds it is different, it changes its value.
4878 54. The smtp_printf() function is now made available to local_scan() so
4879 additional output lines can be written before returning. There is also an
4880 smtp_fflush() function to enable the detection of a dropped connection.
4881 The variables smtp_input and smtp_batched_input are exported to
4884 55. Changed the default runtime configuration: the message "Unknown user"
4885 has been removed from the ACL, and instead placed on the localuser router,
4886 using the cannot_route_message feature. This means that any verification
4887 failures that generate their own messages won't get overridden. Similarly,
4888 the "Unrouteable address" message that was in the ACL for unverifiable
4889 relay addresses has also been removed.
4891 56. Added hosts_avoid_esmtp to the smtp transport.
4893 57. The exicyclog script was not checking for the esoteric option
4894 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4895 will work only if exicyclog is run under the appropriate euid.
4897 58. Following a discussion on the list, the rules by which Exim recognises line
4898 endings on incoming messages have been changed. The -dropcr and drop_cr
4899 options are now no-ops, retained only for backwards compatibility. The
4900 following line terminators are recognized: LF CRLF CR. However, special
4901 processing applies to CR:
4903 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4904 nor a local message in the state where . is a terminator.
4906 (ii) If a bare CR is encountered in a header line, an extra space is added
4907 after the line terminator so as not to end the header. The reasoning
4908 behind this is that bare CRs in header lines are most likely either
4909 to be mistakes, or people trying to play silly games.
4911 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4912 was being incorrectly given as 18 bytes larger than it should have been.
4913 This is a VOB (very old bug).
4915 60. This may never have affected anything current, but just in case it has:
4916 When the local host is found other than at the start of a list of hosts,
4917 the local host, those with the same MX, and any that follow, are discarded.
4918 When the list in question was part of a longer list of hosts, the following
4919 hosts (not currently being processed) were also being discarded. This no
4920 longer happens. I'm not sure if this situation could ever has previously
4923 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4926 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4927 header. This is something that is recommended in a new Internet Draft, and
4928 is something that is documented as being done by Sendmail. There are two
4929 possible values. For messages generated by the autoreply transport, Exim
4932 Auto-Submitted: auto-replied
4934 whereas for all other generated messages (e.g. bounces) it adds
4936 Auto-Submitted: auto-generated
4938 63. The "personal" condition in filters now includes a test for the
4939 Auto-Submitted: header. If it contains the string "auto-" the message it
4940 not considered personal.
4942 64. Added rcpt_include_affixes as a generic transport option.
4944 65. Added queue_only_override (default true).
4946 66. Added the syslog_duplication option.
4948 67. If what should have been the first header line of a message consisted of
4949 a space followed by a colon, Exim was mis-interpreting it as a header line.
4950 It isn't of course - it is syntactically invalid and should therefore be
4951 treated as the start of the message body. The misbehaviour could have
4952 caused a number of strange effects, including loss of data in subsequent
4953 header lines, and spool format errors.
4955 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4956 client host had authenticated. This control can now be exercised by an ACL
4957 for more flexibility.
4959 69. By default, callouts do not happen when testing with -bh. There is now a
4960 variant, -bhc, which does actually run the callout code, including
4961 consulting and updating the callout cache.
4963 70. Added support for saslauthd authentication, courtesy of Alexander
4966 71. If statvfs() failed on the spool or log directories while checking their
4967 size for availability, Exim confusingly gave the error "space shortage".
4968 Furthermore, in debugging mode it crashed with a floating point exception.
4969 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4970 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4971 serious problem, Exim now writes to the main and panic logs when this
4972 happens, with details of the failure. It then refuses to accept the
4973 incoming message, giving the message "spool directory problem" or "log
4974 directory problem" with a 421 code for SMTP messages.
4976 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4977 0, 1, and 2 exist, because some OS complain for execs without them (see
4978 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4979 descriptors. However, the code omitted to check that the open succeeded,
4980 causing mysterious errors if for some reason the permissions on /dev/null
4981 got screwed. Now Exim writes a message to the main and panic logs, and
4982 bombs out if it can't open /dev/null.
4984 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4985 interact so that it is all more flexible. It is supposed to remain
4986 backwards compatible. Also added extra_local_interfaces.
4988 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4989 to bomb out with an assertion failure - to the client this appears as a
4990 connection drop. This problem occurs in the part of the code that was taken
4991 from the Samba project. Fortunately, the assertion is in a very simple
4992 function, so I have fixed this by reproducing the function inline in the
4993 one place where it is called, and arranging for authentication to fail
4994 instead of killing the process with assert().
4996 75. The SPA client code was not working when the server requested OEM rather
4997 than Unicode encoding.
4999 76. Added code to make require_files with a specific uid setting more usable in
5000 the case where statting the file as root fails - usually a non-root-mounted
5001 NFS file system. When this happens and the failure is EACCES, Exim now
5002 forks a subprocess and does the per-uid checking as the relevant uid.
5004 77. Added process_log_path.
5006 78. If log_file_path was not explicitly set, a setting of check_log_space or
5007 check_log_inodes was ignored.
5009 79. If a space check for the spool or log partitions fails, the incident is now
5010 logged. Of course, in the latter case the data may get lost...
5012 80. Added the %p formatting code to string_format() so that it can be used to
5013 print addresses in debug_print(). Adjusted all the address printing in the
5014 debugging in store.c to use %p rather than %d.
5016 81. There was a concern that a line of code in smtp_in.c could overflow a
5017 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5018 initially expressed, the concern was not well-founded, because trailing
5019 spaces are removed early. However, if the trailing spaces were followed by
5020 a NULL, they did not get removed, so the overflow was possible. Two fixes
5023 (a) I re-wrote the offending code in a cleaner fashion.
5024 (b) If an incoming SMTP command contains a NULL character, it is rejected
5027 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5028 runs initgroups(), so that if the Exim user is in any additional groups,
5029 they will be used during message reception.
5035 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob