1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.596 2009/11/16 19:15:36 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.
19 TK/01 Added patch by Johannes Berg that expands the main option
20 "spamd_servers" if it starts with a dollar sign.
22 TK/02 Write list of recipients to X-Envelope-Sender header when building
23 the mbox-format spool file for content scanning (suggested by Jakob
26 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
27 (http://www.dcc-servers.net/) support via dccifd. Activated by
28 setting EXPERIMENTAL_DCC=yes in Local/Makefile. Check out
29 experimental_spec.txt for more documentation.
31 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
32 by Mark Daniel Reidel <mr@df.eu>.
34 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
35 When building exim an external PCRE library is now needed -
36 PCRE is a system library on the majority of modern systems.
37 See entry on PCRE_LIBS in EDITME file.
39 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
40 conversation. Added nologin parameter to request.
41 Patch contributed by Kirill Miazine
43 TF/01 Do not log submission mode rewrites if they do not change the address.
45 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
47 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
48 log files in place. Contributed by Roberto Lima
50 NM/04 Bugzilla 667: close socket used by dovecot authenticator
52 TF/03 Bugzilla 615: When checking the local_parts router precondition
53 after a local_part_suffix or local_part_prefix option, Exim now
54 does not use the address's named list lookup cache, since this
55 contains cached lookups for the whole local part.
57 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
58 Robert Millan. Documentation is in experimental-spec.txt
60 TF/04 Bugzilla 668: Fix parallel build (make -j).
62 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
64 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
65 Patch provided by Jan Srzednicki
67 TF/05 Leading white space used to be stripped from $spam_report which
68 wrecked the formatting. Now it is preserved.
70 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
71 that they are available at delivery time.
73 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
75 TF/08 TLS error reporting now respects the incoming_interface and
76 incoming_port log selectors.
78 TF/09 Produce a more useful error message if an SMTP transport's hosts
79 setting expands to an empty string.
81 NM/06 Bugzilla 744: EXPN did not work under TLS.
82 Patch provided by Phil Pennock
84 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
85 Patch provided by Richard Godbee
87 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
88 acl_smtp_notquit, added index entry.
90 NM/09 Bugzilla 787: Potential buffer overflow in string_format
91 Patch provided by Eugene Bujak
93 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
94 Patch provided by Maxim Dounin
96 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
97 Patch provided by Phil Pennock
99 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
101 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
102 Patch provided by Brad "anomie" Jorsch
104 NM/14 Bugzilla 622: Added timeout setting to transport filter.
105 Patch provided by Dean Brooks
107 TK/05 Add native DKIM support (does not depend on external libraries).
109 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
110 Patch provided by Graeme Fowler
112 NM/16 Bugzilla 851: Documentation example syntax fix.
114 NM/17 Changed NOTICE file to remove references to embedded PCRE.
116 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
118 NM/19 Bugzilla 745: TLS version reporting
119 Patch provided by Phil Pennock
121 NM/20 Bugzilla 167: bool: condition support
122 Patch provided by Phil Pennock
124 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
125 Patch provided by Phil Pennock
127 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
128 Patch provided by Brad "anomie" Jorsch
130 NM/23 Bugzilla 687: Fix misparses in eximstats
131 Patch provided by Heiko Schlittermann
133 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
134 Patch provided by Heiko Schlittermann
136 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
137 plus update to original patch.
139 NM/26 Bugzilla 799: Documentation correction for ratelimit
141 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
142 Patch provided by David Brownlee
144 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
146 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
148 NM/30 Bugzilla 888: TLS documentation bugfixes
150 NM/31 Bugzilla 896: Dovecot buffer overrun fix
152 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
153 Unlike the original bugzilla I have changed all shell scripts in src tree
155 NM/33 Bugzilla 898: Transport filter timeout fix
156 Patch by Todd Rinaldo
158 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
159 Patch by Serge Demonchaux
161 NM/35 Bugzilla 39: Base64 decode bug fixes
162 Patch by Jakob Hirsch
164 NM/36 Bugzilla 909: Correct connect() call in dcc code
166 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
168 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
170 NM/39 Bugzilla 911: Fixed MakeLinks build script
176 TK/01 Add preliminary DKIM support. Currently requires a forked version of
177 ALT-N's libdkim that I have put here:
178 http://duncanthrax.net/exim-experimental/
180 Note to Michael Haardt: I had to rename some vars in sieve.c. They
181 were called 'true' and it seems that C99 defines that as a reserved
182 keyword to be used with 'bool' variable types. That means you could
183 not include C99-style headers which use bools without triggering
184 build errors in sieve.c.
186 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
187 as mailq or other aliases. Changed the --help handling significantly
188 to do whats expected. exim_usage() emits usage/help information.
190 SC/01 Added the -bylocaldomain option to eximstats.
192 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
194 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
196 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
202 PH/01 Another patch from the Sieve maintainer.
204 PH/02 When an IPv6 address is converted to a string for single-key lookup
205 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
206 dots are used instead of colons so that keys in lsearch files need not
207 contain colons. This was done some time before quoting was made available
208 in lsearch files. However, iplsearch files do require colons in IPv6 keys
209 (notated using the quote facility) so as to distinguish them from IPv4
210 keys. This meant that lookups for IP addresses in host lists did not work
211 for iplsearch lookups.
213 This has been fixed by arranging for IPv6 addresses to be expressed with
214 colons if the lookup type is iplsearch. This is not incompatible, because
215 previously such lookups could never work.
217 The situation is now rather anomolous, since one *can* have colons in
218 ordinary lsearch keys. However, making the change in all cases is
219 incompatible and would probably break a number of configurations.
221 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
224 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
225 conversion specification without a maximum field width, thereby enabling
226 a rogue spamd server to cause a buffer overflow. While nobody in their
227 right mind would setup Exim to query an untrusted spamd server, an
228 attacker that gains access to a server running spamd could potentially
229 exploit this vulnerability to run arbitrary code as the Exim user.
231 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
232 $primary_hostname instead of what libspf2 thinks the hosts name is.
234 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
235 a directory entry by the name of the lookup key. Previously, if a
236 symlink pointed to a non-existing file or a file in a directory that
237 Exim lacked permissions to read, a lookup for a key matching that
238 symlink would fail. Now it is enough that a matching directory entry
239 exists, symlink or not. (Bugzilla 503.)
241 PH/03 The body_linecount and body_zerocount variables are now exported in the
244 PH/04 Added the $dnslist_matched variable.
246 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
247 This means they are set thereafter only if the connection becomes
250 PH/06 Added the client_condition to authenticators so that some can be skipped
251 by clients under certain conditions.
253 PH/07 The error message for a badly-placed control=no_multiline_responses left
254 "_responses" off the end of the name.
256 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
258 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
259 (without spaces) instead of just copying the configuration text.
261 PH/10 Added the /noupdate option to the ratelimit ACL condition.
263 PH/11 Added $max_received_linelength.
265 PH/12 Added +ignore_defer and +include_defer to host lists.
267 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
268 way in which PCRE > 7.0 is built.
270 PH/14 Implemented queue_only_load_latch.
272 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
273 MAIL command. The effect was to mangle the value on 64-bit systems.
275 PH/16 Another patch from the Sieve maintainer.
277 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
279 PH/18 If a system quota error occurred while trying to create the file for
280 a maildir delivery, the message "Mailbox is full" was not appended to the
281 bounce if the delivery eventually timed out. Change 4.67/27 below applied
282 only to a quota excession during the actual writing of the file.
284 PH/19 It seems that peer DN values may contain newlines (and other non-printing
285 characters?) which causes problems in log lines. The DN values are now
286 passed through string_printing() before being added to log lines.
288 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
289 and InterBase are left for another time.)
291 PH/21 Added message_body_newlines option.
293 PH/22 Guard against possible overflow in moan_check_errorcopy().
295 PH/23 POSIX allows open() to be a macro; guard against that.
297 PH/24 If the recipient of an error message contained an @ in the local part
298 (suitably quoted, of course), incorrect values were put in $domain and
299 $local_part during the evaluation of errors_copy.
305 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
306 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
309 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
310 issue a MAIL command.
312 PH/02 In an ACL statement such as
314 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
316 if a client was not listed at all, or was listed with a value other than
317 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
318 the condition was not true (as it should be), so access was not denied.
319 The bug was that the ! inversion was incorrectly passed on to the second
320 item. This has been fixed.
322 PH/03 Added additional dnslists conditions == and =& which are different from
323 = and & when the dns lookup returns more than one IP address.
325 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
326 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
328 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
329 FSYNC, which compiles an option called disable_fsync that allows for
330 bypassing fsync(). The documentation is heavily laced with warnings.
332 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
334 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
335 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
336 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
337 including adding "make clean"; (3) Added -fPIC when compiling the test
338 dynamically loaded module, to get rid of a warning.
340 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
341 message fails, move_frozen_messages = true and ignore_bounce_errors_after
342 = 0s. The bug is otherwise harmless.
344 PH/07 There was a bug in the dovecot authenticator such that the value of
345 $auth1 could be overwritten, and so not correctly preserved, after a
346 successful authentication. This usually meant that the value preserved by
347 the server_setid option was incorrect.
349 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
351 PH/09 Installed PCRE release 7.0.
353 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
354 run for batched SMTP input. It is now run at the start of every message
355 in the batch. While fixing this I discovered that the process information
356 (output by running exiwhat) was not always getting set for -bs and -bS
357 input. This is fixed, and it now also says "batched" for BSMTP.
359 PH/11 Added control=no_pipelining.
361 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
362 patch, slightly modified), and move the expansion of helo_data till after
363 the connection is made in the smtp transport (so it can use these
366 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
368 PH/14 Added log_selector = +pid.
370 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
372 PH/16 Add ${if forany and ${if forall.
374 PH/17 Added dsn_from option to vary the From: line in DSNs.
376 PH/18 Flush SMTP output before performing a callout, unless control =
377 no_callout_flush is set.
379 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
380 was true (the default) a successful delivery failed to delete the retry
381 item, thus causing premature timeout of the address. The bug is now
384 PH/20 Added hosts_avoid_pipelining to the smtp transport.
386 PH/21 Long custom messages for fakedefer and fakereject are now split up
387 into multiline reponses in the same way that messages for "deny" and
388 other ACL rejections are.
390 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
391 with slight modification.
393 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
394 draft, changing the syntax and factoring some duplicate code".
396 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
397 for deliveries of the second and subsequent messages over the same SMTP
400 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
401 ${reduce, with only minor "tidies".
403 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
405 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
406 expansion side effects.
408 PH/27 When a message times out after an over-quota error from an Exim-imposed
409 quota, the bounce message says "mailbox is full". This message was not
410 being given when it was a system quota that was exceeded. It now should
413 MH/03 Made $recipients available in local_scan(). local_scan() already has
414 better access to the recipient list through recipients_list[], but
415 $recipients can be useful in postmaster-provided expansion strings.
417 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
418 in the case of a MAIL command with additional options following the
419 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
420 were accidentally chopped off.
422 PH/29 SMTP synchronization checks are implemented when a command is read -
423 there is a check that no more input is waiting when there shouldn't be
424 any. However, for some commands, a delay in an ACL can mean that it is
425 some time before the response is written. In this time, more input might
426 arrive, invalidly. So now there are extra checks after an ACL has run for
427 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
428 pipelining has not been advertised.
430 PH/30 MH's patch to allow iscntrl() characters to be list separators.
432 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
433 returned in the SMTP response when smtp_return_error_details was false.
436 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
437 instead of the C I/O that was originally supplied, because problems were
440 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
441 Exim which did not show up earlier: it was assuming that a call to
442 SSL_CTX_set_info_callback() might give an error value. In fact, there is
443 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
444 was a macro that became an assignment, so it seemed to work. This has
445 changed to a proper function call with a void return, hence the compile
446 error. Exim's code has been fixed.
448 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
451 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
453 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
455 PH/37 If a message is not accepted after it has had an id assigned (e.g.
456 because it turns out to be too big or there is a timeout) there is no
457 "Completed" line in the log. When some messages of this type were
458 selected by exigrep, they were listed as "not completed". Others were
459 picked up by some special patterns. I have improved the selection
460 criteria to be more general.
462 PH/38 The host_find_failed option in the manualroute router can now be set
463 to "ignore", to completely ignore a host whose IP address cannot be
464 found. If all hosts are ignored, the behaviour is controlled by the new
465 host_all_ignored option.
467 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
468 homing or because of multiple MX records with /mx) generated more than
469 one IP address, and the following item turned out to be the local host,
470 all the secondary addresses of the first item were incorrectly removed
471 from the list, along with the local host and any following hosts (which
472 is what is supposed to happen).
474 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
475 whoever called Exim into the -H file. In the case of the daemon it was
476 behaving confusingly. When first started, it used values for whoever
477 started the daemon, but after a SIGHUP it used the Exim user (because it
478 calls itself on a restart). I have changed the code so that it now always
481 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
482 message are rejected with the same error (e.g. no authentication or bad
483 sender address), and a DATA command is nevertheless sent (as can happen
484 with PIPELINING or a stupid MUA), the error message that was given to the
485 RCPT commands is included in the rejection of the DATA command. This is
486 intended to be helpful for MUAs that show only the final error to their
489 PH/42 Another patch from the Sieve maintainer.
491 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
492 Eximstats - Fixed some broken HTML links and added missing column headers
494 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
495 columns for Rejects, Temp Rejects, Ham, and Spam rows.
497 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
499 PH/43 Yet another patch from the Sieve maintainer.
501 PH/44 I found a way to check for a TCP/IP connection going away before sending
502 the response to the final '.' that terminates a message, but only in the
503 case where the client has not sent further data following the '.'
504 (unfortunately, this is allowed). However, in many cases there won't be
505 any further data because there won't be any more messages to send. A call
506 to select() can be used: if it shows that the input is "ready", there is
507 either input waiting, or the socket has been closed. An attempt to read
508 the next input character can distinguish the two cases. Previously, Exim
509 would have sent an OK response which the client would never have see.
510 This could lead to message repetition. This fix should cure that, at
511 least in a lot of common cases.
513 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
514 advertised in response to EHLO.
520 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
521 fixed by 4.65/MH/01 (is this a record?) are fixed:
523 (i) An empty string was always treated as zero by the numeric comparison
524 operators. This behaviour has been restored.
526 (ii) It is documented that the numeric comparison operators always treat
527 their arguments as decimal numbers. This was broken in that numbers
528 starting with 0 were being interpreted as octal.
530 While fixing these problems I realized that there was another issue that
531 hadn't been noticed. Values of message_size_limit (both the global option
532 and the transport option) were treated as octal if they started with 0.
533 The documentation was vague. These values are now always treated as
534 decimal, and I will make that clear in the documentation.
540 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
541 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
544 MH/01 Don't check that the operands of numeric comparison operators are
545 integers when their expansion is in "skipping" mode (fixes bug
546 introduced by 4.64-PH/07).
548 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
549 child addresses, Exim now panics and dies. Previously, because the count
550 is held in a short int, deliveries were likely to be lost. As such a
551 large number of recipients for a single message is ridiculous
552 (performance will be very, very poor), I have chosen to impose a limit
553 rather than extend the field.
559 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
560 leftover -K file (the existence of which was triggered by #402).
561 While we were at it, introduced process PID as part of the -K
562 filename. This should rule out race conditions when creating
565 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
566 processing considerably. Previous code took too long for large mails,
567 triggering a timeout which in turn triggers #401.
569 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
570 in the DK code in transports.c. sendfile() is not really portable,
571 hence the _LINUX specificness.
573 TF/01 In the add_headers option to the mail command in an Exim filter,
574 there was a bug that Exim would claim a syntax error in any
575 header after the first one which had an odd number of characters
578 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
579 callout verification, Exim cached a "reject" for the entire domain. This
580 is correct for most verifications, but it is not correct for a recipient
581 verification with use_sender or use_postmaster set, because in that case
582 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
583 case of MAIL FROM:<> rejection from other early rejections (e.g.
584 rejection of HELO). When verifying a recipient using a non-null MAIL
585 address, the cache is ignored if it shows MAIL FROM:<> rejection.
586 Whatever the result of the callout, the value of the domain cache is
587 left unchanged (for any other kind of callout, getting as far as trying
588 RCPT means that the domain itself is ok).
590 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
593 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
594 manifest itself as EPIPE rather than ECONNECT. When tidying away a
595 session, the daemon ignores ECONNECT errors and logs others; it now
596 ignores EPIPE as well.
598 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
599 (quoted-printable decoding).
601 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
602 later the small subsequent patch to fix an introduced bug.
604 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
606 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
608 PH/08 An error is now given if message_size_limit is specified negative.
610 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
611 to be given (somewhat) arbitrary names.
613 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
616 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
617 miscellaneous code fixes
619 PH/10 Added the log_reject_target ACL modifier to specify where to log
622 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
623 hostname. This is wrong, because it relates to the incoming message (and
624 probably the interface on which it is arriving) and not to the outgoing
625 callout (which could be using a different interface). This has been
626 changed to use the value of the helo_data option from the smtp transport
627 instead - this is what is used when a message is actually being sent. If
628 there is no remote transport (possible with a router that sets up host
629 addresses), $smtp_active_hostname is used.
631 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
632 tweaks were necessary in order to get it to work (see also 21 below):
633 (a) The code assumed that strncpy() returns a negative number on buffer
634 overflow, which isn't the case. Replaced with Exim's string_format()
636 (b) There were several signed/unsigned issues. I just did the minimum
637 hacking in of casts. There is scope for a larger refactoring.
638 (c) The code used strcasecmp() which is not a standard C function.
639 Replaced with Exim's strcmpic() function.
640 (d) The code set only $1; it now sets $auth1 as well.
641 (e) A simple test gave the error "authentication client didn't specify
642 service in request". It would seem that Dovecot has changed its
643 interface. Fortunately there's a specification; I followed it and
644 changed what the client sends and it appears to be working now.
646 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
649 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
650 address A is aliased to B and C, where B exists and C does not. Without
651 -v the output is "A verified" because verification stops after a
652 successful redirection if more than one address is generated. However,
653 with -v the child addresses are also verified. Exim was outputting "A
654 failed to verify" and then showing the successful verification for C,
655 with its parentage. It now outputs "B failed to verify", showing B's
656 parentage before showing the successful verification of C.
658 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
659 look up a TXT record in a specific list after matching in a combined
662 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
663 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
664 they consult the DNS. I had assumed they would set it the way they
665 wanted; and indeed my experiments on Linux seem to show that in some
666 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
667 To be on the safe side, however, I have now made the interface to
668 host_find_byname() similar to host_find_bydns(), with an argument
669 containing the DNS resolver options. The host_find_byname() function now
670 sets these options at its start, just as host_find_bydns() does. The smtp
671 transport options dns_qualify_single and dns_search_parents are passed to
672 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
673 of host_find_byname() use the default settings of RES_DEFNAMES
674 (qualify_single) but not RES_DNSRCH (search_parents).
676 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
677 spool_read_header() do less string testing, by means of a preliminary
678 switch on the second character of optional "-foo" lines. (This is
679 overdue, caused by the large number of possibilities that now exist.
680 Originally there were few.) While I was there, I also converted the
681 str(n)cmp tests so they don't re-test the leading "-" and the first
682 character, in the hope this might squeeze out yet more improvement.
684 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
685 flag allowing group syntax was set by the header_syntax check but not
686 turned off, possible causing trouble later; (2) The flag was not being
687 set at all for the header_verify test, causing "group"-style headers to
688 be rejected. I have now set it in this case, and also caused header_
689 verify to ignore an empty address taken from a group. While doing this, I
690 came across some other cases where the code for allowing group syntax
691 while scanning a header line wasn't quite right (mostly, not resetting
692 the flag correctly in the right place). These bugs could have caused
693 trouble for malformed header lines. I hope it is now all correct.
695 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
696 with the "reply" argument non-NULL. The code, however (which originally
697 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
698 but it didn't always do it. This confused somebody who was copying the
699 code for some other use. I have removed all the tests.
701 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
702 feature that was used to support insecure browsers during the U.S. crypto
703 embargo. It requires special client support, and Exim is probably the
704 only MTA that supported it -- and would never use it because real RSA is
705 always available. This code has been removed, because it had the bad
706 effect of slowing Exim down by computing (never used) parameters for the
707 RSA_EXPORT functionality.
709 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
710 authenticator to fail if there's a tab character in the incoming data
711 (there should never be unless someone is messing about, as it's supposed
712 to be base64-encoded). Also added, on Timo's advice, the "secured" option
713 if the connection is using TLS or if the remote IP is the same as the
714 local IP, and the "valid-client-cert option" if a client certificate has
717 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
718 authenticators. This can be used for authorization after authentication
719 succeeds. (In the case of plaintext, it servers for both authentication
722 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
723 if any retry times were supplied.
725 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
726 connection, where there is no client IP address to check. In this
727 situation, the verify now always succeeds.
729 PH/25 Applied John Jetmore's -Mset patch.
731 PH/26 Added -bem to be like -Mset, but loading a message from a file.
733 PH/27 In a string expansion for a processed (not raw) header when multiple
734 headers of the same name were present, leading whitespace was being
735 removed from all of them, but trailing whitespace was being removed only
736 from the last one. Now trailing whitespace is removed from each header
737 before concatenation. Completely empty headers in a concatenation (as
740 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
741 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
743 PH/29 [Removed. This was a change that I later backed out, and forgot to
744 correct the ChangeLog entry (that I had efficiently created) before
745 committing the later change.]
747 PH/30 Exim was sometimes attempting to deliver messages that had suffered
748 address errors (4xx response to RCPT) over the same connection as other
749 messages routed to the same hosts. Such deliveries are always "forced",
750 so retry times are not inspected. This resulted in far too many retries
751 for the affected addresses. The effect occurred only when there were more
752 hosts than the hosts_max_try setting in the smtp transport when it had
753 the 4xx errors. Those hosts that it had tried were not added to the list
754 of hosts for which the message was waiting, so if all were tried, there
755 was no problem. Two fixes have been applied:
757 (i) If there are any address or message errors in an SMTP delivery, none
758 of the hosts (tried or untried) are now added to the list of hosts
759 for which the message is waiting, so the message should not be a
760 candidate for sending over the same connection that was used for a
761 successful delivery of some other message. This seems entirely
762 reasonable: after all the message is NOT "waiting for some host".
763 This is so "obvious" that I'm not sure why it wasn't done
764 previously. Hope I haven't missed anything, but it can't do any
765 harm, as the worst effect is to miss an optimization.
767 (ii) If, despite (i), such a delivery is accidentally attempted, the
768 routing retry time is respected, so at least it doesn't keep
769 hammering the server.
771 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
772 in ${readsocket because some servers need this prod.
774 PH/32 Added some extra debug output when updating a wait-xxx database.
776 PH/33 The hint "could be header name not terminated by colon", which has been
777 given for certain expansion errors for a long time, was not being given
778 for the ${if def:h_colon_omitted{... case.
780 PH/34 The spec says: "With one important exception, whenever a domain list is
781 being scanned, $domain contains the subject domain." There was at least
782 one case where this was not true.
784 PH/35 The error "getsockname() failed: connection reset by peer" was being
785 written to the panic log as well as the main log, but it isn't really
786 panic-worthy as it just means the connection died rather early on. I have
787 removed the panic log writing for the ECONNRESET error when getsockname()
790 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
791 runs only) independently of the message's sender address. This meant
792 that, if the 4xx error was in fact related to the sender, a different
793 message to the same recipient with a different sender could confuse
794 things. In particualar, this can happen when sending to a greylisting
795 server, but other circumstances could also provoke similar problems.
796 I have changed the default so that the retry time for these errors is now
797 based a combination of the sender and recipient addresses. This change
798 can be overridden by setting address_retry_include_sender=false in the
801 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
802 remote server are returned as part of bounce messages. This was not
803 happening for LMTP over a pipe (the lmtp transport), but now it is the
804 same for both kinds of LMTP.
806 PH/38 Despite being documented as not happening, Exim was rewriting addresses
807 in header lines that were in fact CNAMEs. This is no longer the case.
809 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
810 and queue runs started by the daemon processed all messages. This has
811 been fixed so that -R and -S can now usefully be given with -q<time>.
813 PH/40 Import PCRE release 6.7 (fixes some bugs).
815 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
817 PH/42 Give an error if -q is specified more than once.
819 PH/43 Renamed the variables $interface_address and $interface_port as
820 $received_ip_address and $received_port, to make it clear that these
821 values apply to message reception, and not to the outgoing interface when
822 a message is delivered. (The old names remain recognized, of course.)
824 PH/44 There was no timeout on the connect() call when using a Unix domain
825 socket in the ${readsocket expansion. There now is.
827 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
828 be meaningful with "accept".
830 SC/01 Eximstats V1.43
831 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
833 SC/02 Eximstats V1.44
834 Use a glob alias rather than an array ref in the generated
835 parser. This improves both readability and performance.
837 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
838 Collect SpamAssassin and rejection statistics.
839 Don't display local sender or destination tables unless
840 there is data to show.
841 Added average volumes into the top table text output.
843 SC/04 Eximstats V1.46
844 Collect data on the number of addresses (recipients)
845 as well as the number of messages.
847 SC/05 Eximstats V1.47
848 Added 'Message too big' to the list of mail rejection
849 reasons (thanks to Marco Gaiarin).
851 SC/06 Eximstats V1.48
852 Mainlog lines which have GMT offsets and are too short to
853 have a flag are now skipped.
855 SC/07 Eximstats V1.49 (Alain Williams)
856 Added the -emptyok flag.
858 SC/08 Eximstats V1.50
859 Fixes for obtaining the IP address from reject messages.
861 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
862 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
863 whitesspace changes from 4.64-PH/27
865 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
868 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
869 are found, allow negative numbers in numeric criteria)
871 JJ/06 exipick.20061117.2, added new $message_body_missing variable
873 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
874 to match changes made in 4.64-PH/43
876 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
878 PH/47 Put in an explicit test for a DNS lookup of an address record where the
879 "domain" is actually an IP address, and force a failure. This locks out
880 those revolvers/nameservers that support "A-for-A" lookups, in
881 contravention of the specifications.
883 PH/48 When a host name was looked up from an IP address, and the subsequent
884 forward lookup of the name timed out, the host name was left in
885 $sender_host_name, contrary to the specification.
887 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
888 restricted to single-key lookups, Exim was not diagnosing an error if
889 * or *@ was used with a query-style lookup.
891 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
893 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
894 long ago, but noone interested enough thought of it. Let's just say that
895 the "1.1" means that there are some new functions that weren't there at
896 some point in the past.
898 PH/51 Error processing for expansion failure of helo_data from an smtp
899 transport during callout processing was broken.
901 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
902 tested/used via the -bh/-bhc/-bs options.
904 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
905 bug, fixed in subsequent PCRE releases).
907 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
908 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
910 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
916 SC/01 Use a glob alias rather than an array ref in eximstats generated
917 parser. This improves both readability and performance.
919 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
920 Don't display local sender or destination tables in eximstats unless
921 there is data to show.
922 Added average volumes into the eximstats top table text output.
924 SC/03 Collect data on the number of addresses (recipients) as well
925 as the number of messages in eximstats.
927 TF/01 Correct an error in the documentation for the redirect router. Exim
928 does (usually) call initgroups() when daemonizing.
930 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
931 with consistent privilege compared to when running as a daemon.
933 TF/03 Note in the spec that $authenticated_id is not set for local
934 submissions from trusted users.
936 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
937 Thanks to Dean Brooks <dean@iglou.com> for the patch.
939 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
940 by adding some example configuration directives to the default
941 configuration file. A little bit of work is required to uncomment the
942 directives and define how usernames and passwords are checked, but
943 there is now a framework to start from.
945 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
946 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
947 without this. I don't know how relevant this is to other LDAP libraries.
949 PH/02 Add the verb name to the "unknown ACL verb" error.
951 PH/03 Magnus Holmgren's patch for filter_prepend_home.
953 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
955 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
956 directory not expanded when it should be if an expanded home directory
957 was set for the address (which is overridden by the transport).
959 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
962 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
963 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
964 because it is too late at that time, and has no effect.
966 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
967 security issue with \' (bugzilla #107). I could not use the
968 PQescapeStringConn() function, because it needs a PGconn value as one of
971 PH/08 When testing addresses using -bt, indicate those final addresses that
972 are duplicates that would not cause an additional delivery. At least one
973 person was confused, thinking that -bt output corresponded to deliveries.
974 (Suppressing duplicates isn't a good idea as you lose the information
975 about possibly different redirections that led to the duplicates.)
977 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
978 systems where poll() doesn't work, in particular OS X.
980 PH/10 Added more information to debugging output for retry time not reached.
982 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
983 operations in malware.c.
985 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
988 PH/13 If write_rejectlog was set false when logging was sent to syslog with
989 syslog_duplication set false, log lines that would normally be written
990 both the the main log and to the reject log were not written to syslog at
993 PH/14 In the default configuration, change the use of "message" in ACL warn
994 statements to "add_header".
996 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
997 not followed by a command (e.g. "seen endif").
999 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1000 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1003 PH/17 Added extra conditions to the default value of delay_warning_condition
1007 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1008 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1009 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1012 The Auto-Submitted: and various List- headers are standardised, whereas I
1013 don't think Precedence: ever was.
1015 PH/18 Refactored debugging code in route_finduser() to show more information,
1016 in particular, the error code if getpwnam() issues one.
1018 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1019 This is apparently needed in addition to the PH/07 change above to avoid
1020 any possible encoding problems.
1022 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1023 but not after initializing Perl.
1025 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1026 output them only if debugging. By default they are written stderr,
1027 apparently, which is not desirable.
1029 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1032 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1035 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1037 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1038 authenticated or an ident call has been made. Suppress the default
1039 values for $authenticated_id and $authenticated_sender (but permit -oMai
1040 and -oMas) when testing with -bh.
1042 PH/24 Re-jigged the order of the tests in the default configuration so that the
1043 tests for valid domains and recipients precede the DNS black list and CSA
1044 tests, on the grounds that those ones are more expensive.
1046 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1047 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1048 This bug exists in every version of Exim that I still have, right back to
1051 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1052 However, an attempt to turn on case-sensitivity in a regex key by
1053 including (?-i) didn't work because the subject string was already
1054 lowercased, and the effects were non-intuitive. It turns out that a
1055 one-line patch can be used to allow (?-i) to work as expected.
1061 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1062 other effects) broke the use of negated acl sub-conditions.
1064 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1067 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1068 "Deny" causes Exim to reject the incoming connection with a 554 error.
1069 Unfortunately, if there is a major crisis, such as a disk failure,
1070 tcp-wrappers gives "deny", whereas what one would like would be some
1071 kind of temporary error. A kludge has been added to help with this.
1072 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1073 554 error is used if errno is still zero or contains ENOENT (which occurs
1074 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1077 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1079 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1080 errors. Otherwise a message that provokes a temporary error (when other
1081 messages do not) can cause a whole host to time out.
1083 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1084 addresses were routed directly to files or pipes from a redirect router.
1085 File deliveries just didn't batch; pipe deliveries might have suffered
1088 PH/06 A failure to get a lock for a hints database would erroneously always say
1089 "Failed to get write lock", even when it was really a read lock.
1091 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1092 of 0600. This has been changed to use the value of the lockfile_mode
1093 option (which defaults to 0600).
1095 PH/08 Applied small patch from the Sieve maintainer.
1097 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1098 folder from quota calculations, a direct delivery into this folder messed
1099 up the contents of the maildirsize file. This was because the regex was
1100 used only to exclude .Trash (or whatever) when the size of the mailbox
1101 was calculated. There was no check that a delivery was happening into an
1102 excluded directory. This bug has been fixed by ignoring all quota
1103 processing for deliveries into excluded directories.
1105 PH/10 Added the maildirfolder_create_regex option to appendfile.
1111 PH/01 The code for finding all the local interface addresses on a FreeBSD
1112 system running IPv6 was broken. This may well have applied to all BSD
1113 systems, as well as to others that have similar system calls. The broken
1114 code found IPv4 interfaces correctly, but gave incorrect values for the
1115 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1116 that it would not match correctly against @[] and not recognize the IPv6
1119 PH/02 The ipliteral router was not recognizing addresses of the form user@
1120 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1122 PH/03 Added disable_ipv6.
1124 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1125 decoded form, because it is most often used to construct To: headers
1126 lines in autoreplies, and the decoded form may well be syntactically
1127 invalid. However, $reply_address has leading white space removed, and all
1128 newlines turned into spaces so that the autoreply transport does not
1131 PH/05 If group was specified without a user on a router, and no group or user
1132 was specified on a transport, the group from the router was ignored.
1134 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1135 for visible compile-time settings that can be used to change these
1136 numbers, for those that want even more. Backwards compatibility with old
1137 spool files has been maintained. However, going back to a previous Exim
1138 release will lost any variables that are in spool files.
1140 PH/07 Two small changes when running in the test harness: increase delay when
1141 passing a TCP/IP connection to a new process, in case the original
1142 process has to generate a bounce, and remove special handling of
1143 127.0.0.2 (sic), which is no longer necessary.
1145 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1146 be the same on different OS.
1148 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1151 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1152 whether --show-vars was specified or not
1154 JJ/02 exipick: Added support for new ACL variable spool format introduced
1157 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1158 syntactically invalid From: or Reply-to: line, and a filter used this to
1159 generate an autoreply, and therefore failed to obtain an address for the
1160 autoreply, Exim could try to deliver to a non-existent relative file
1161 name, causing unrelated and misleading errors. What now happens is that
1162 it logs this as a hard delivery error, but does not attempt to create a
1165 PH/11 The exinext utility has a -C option for testing purposes, but although
1166 the given file was scanned by exinext itself; it wasn't being passed on
1167 when Exim was called.
1169 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1170 an end-of-file indication when reading a command response.
1172 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1173 compiled. In many other places in Exim, IPv6 addresses are always
1174 recognized, so I have changed this. It also means that IPv4 domain
1175 literals of the form [IPV4:n.n.n.n] are now always recognized.
1177 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1178 used if the router is not running as root, for example, when verifying at
1179 ACL time, or when using -bh. The debugging output from this situation was
1180 non-existent - all you got was a failure to exec. I have made two
1183 (a) Failures to set uid/gid, the current directory, or a process leader
1184 in a subprocess such as that created by queryprogram now generate
1185 suitable debugging ouput when -d is set.
1187 (b) The queryprogram router detects when it is not running as root,
1188 outputs suitable debugging information if -d is set, and then runs
1189 the subprocess without attempting to change uid/gid.
1191 PH/15 Minor change to Makefile for building test_host (undocumented testing
1194 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1195 additional section of a DNS packet that returns MX or SRV records.
1196 Instead, it always explicitly searches for A/AAAA records. This avoids
1197 major problems that occur when a DNS server includes only records of one
1198 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1199 fixed another bug: if SRV records were looked up and the corresponding
1200 address records were *not* found in the additional section, the port
1201 values from the SRV records were lost.
1203 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1204 using the correct key (the original address) when searching the retry
1205 rules in order to find which one to use for generating the retry hint.
1207 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1208 adding the default one. Similarly, if it contains a Reply-To: header, the
1209 errors_reply_to option, if set, is not used.
1211 PH/19 When calculating a retry time, Exim used to measure the "time since
1212 failure" by looking at the "first failed" field in the retry record. Now
1213 it does not use this if it is later than than the arrival time of the
1214 message. Instead it uses the arrival time. This makes for better
1215 behaviour in cases where some deliveries succeed, thus re-setting the
1216 "first failed" field. An example is a quota failure for a huge message
1217 when small messages continue to be delivered. Without this change, the
1218 "time since failure" will always be short, possible causing more frequent
1219 delivery attempts for the huge message than are intended.
1220 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1222 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1223 $1, $2, $3) because the numerical variables can be reset during some
1224 expansion items (e.g. "match"), thereby losing the authentication data.
1226 PH/21 Make -bV show the size of off_t variables so that the test suite can
1227 decide whether to run tests for quotas > 2G.
1229 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1230 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1231 filecount value is greater than 2G or if a quota value is greater than 2G
1232 on a system where the size of off_t is not greater than 4, a panic error
1235 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1236 never match. The debug and -bh output now contains an explicit error
1237 message indicating a malformed IPv4 address or mask.
1239 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1240 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1241 PH/23 above applies.
1243 PH/25 Do not write to syslog when running in the test harness. The only
1244 occasion when this arises is a failure to open the main or panic logs
1245 (for which there is an explicit test).
1247 PH/26 Added the /no_tell option to "control=freeze".
1249 PH/27 If a host name lookup failed very early in a connection, for example, if
1250 the IP address matched host_lookup and the reverse lookup yielded a name
1251 that did not have a forward lookup, an error message of the form "no IP
1252 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1253 could be logged. Now it outputs the IP address instead of "NULL".
1255 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1256 allows the sender and the authenticated sender to be set when
1257 submitting a message from within Exim. Since child_open_exim() is
1258 documented for local_scan(), the new function should be too.
1260 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1261 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1262 results in an empty string is now treated as unset.
1264 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1266 PH/31 Added sender_verify_fail logging option.
1268 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1269 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1270 tidied the source and removed it altogether.
1272 PH/33 When a queue run was abandoned because the load average was too high, a
1273 log line was always written; now it is written only if the queue_run log
1274 selector is set. In addition, the log line for abandonment now contains
1275 information about the queue run such as the pid. This is always present
1276 in "start" and "stop" lines but was omitted from the "abandon" line.
1278 PH/34 Omit spaces between a header name and the colon in the error message that
1279 is given when verify = headers_syntax fails (if there are lots of them,
1280 the message gets confusing).
1282 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1283 names, as there are now some PTR records that contain slashes. This check
1284 is only to protect against broken name servers that fall over on strange
1285 characters, so the fact that it applies to all lookups doesn't matter.
1287 PH/36 Now that the new test suite is complete, we can remove some of the
1288 special code in Exim that was needed for the old test suite. For example,
1289 sorting DNS records because real resolvers return them in an arbitrary
1290 order. The new test suite's fake resolver always returns records in the
1293 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1294 bounces) except when queue_only is set, to avoid logging races between
1295 the different processes.
1297 PH/38 Panic-die if .include specifies a non-absolute path.
1299 PH/39 A tweak to the "H" retry rule from its user.
1301 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1302 a label. They prevented compilation on older perls.
1304 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1305 a warning to be raised on newish perls.
1307 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1308 on queue. Changes to match documented behaviour of showing count of
1309 messages matching specified criteria.
1311 PH/40 Changed the default ident timeout from 30s to 5s.
1313 PH/41 Added support for the use of login_cap features, on those BSD systems
1314 that have them, for controlling the resources used by pipe deliveries.
1316 PH/42 The content-scanning code uses fopen() to create files in which to put
1317 message data. Previously it was not paying any attention to the mode of
1318 the files. Exim runs with umask(0) because the rest of the code creates
1319 files with open(), and sets the required mode explicitly. Thus, these
1320 files were ending up world-writeable. This was not a big issue, because,
1321 being within the spool directory, they were not world-accessible. I have
1322 created a function called modefopen, which takes an additional mode
1323 argument. It sets umask(777), creates the file, chmods it to the required
1324 mode, then resets the umask. All the relevant calls to fopen() in the
1325 content scanning code have been changed to use this function.
1327 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1328 to 24 hours. This avoids potential overflow problems when processing G
1329 and H retry rules. I suspect nobody ever tinkers with this value.
1331 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1333 PH/45 When the plaintext authenticator is running as a client, the server's
1334 challenges are checked to ensure they are valid base64 strings. By
1335 default, the authentication attempt is cancelled if an invalid string is
1336 received. Setting client_ignore_invalid_base64 true ignores these errors.
1337 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1338 they are received. Thus, the responses can be made to depend on the
1339 challenges. If an invalid string is ignored, an empty string is placed in
1342 PH/46 Messages that are created by the autoreply transport now contains a
1343 References: header, in accordance with RFCs 2822 and 3834.
1345 PH/47 Added authenticated_sender_force to the smtp transport.
1347 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1349 PH/49 Installed latest patch from the Sieve maintainer.
1351 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1352 was also set, the appendfile transport was unnecessarily scanning a
1353 directory of message files (e.g. for maildir delivery) to find the count
1354 of files (along with the size), even though it did not need this
1355 information. It now does the scan only if it needs to find either the
1356 size of the count of files.
1358 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1360 PH/52 Two bugs concerned with error handling when the smtp transport is
1363 (i) Exim was not creating retry information for temporary errors given
1364 for individual recipients after the DATA command when the smtp transport
1365 was used in LMTP mode. This meant that they could be retried too
1366 frequently, and not timed out correctly.
1368 (ii) Exim was setting the flag that allows error details to be returned
1369 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1370 recipients that were returned after the DATA command.
1372 PH/53 This is related to PH/52, but is more general: for any failing address,
1373 when detailed error information was permitted to be returned to the
1374 sender, but the error was temporary, then after the final timeout, only
1375 "retry timeout exceeded" was returned. Now it returns the full error as
1376 well as "retry timeout exceeded".
1378 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1379 do this, and (what is worse) MTAs that accept it.
1381 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1382 will now be deprecated.
1384 PH/56 New os.c-cygwin from the Cygwin maintainer.
1386 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1387 formats (previously only available in exim formats via -bpr, -bpru,
1388 and -bpra. Now also available in native and exiqgrep formats)
1390 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1391 with very large, slow to parse queues
1393 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1395 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1397 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1398 responses to authentication challenges, though it was showing the
1399 challenges; (ii) I've removed the CR characters from the debug output for
1402 PH/58 Allow for the insertion of a newline as well as a space when a string
1403 is turned into more than one encoded-word during RFC 2047 encoding. The
1404 Sieve code now uses this.
1406 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1407 data_4xx, lost_connection, tls_required.
1409 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1410 message was being sent as an SMTP response.
1412 PH/61 Add -l and -k options to exicyclog.
1414 PH/62 When verifying, if an address was redirected to one new address, so that
1415 verification continued, and the new address failed or deferred after
1416 having set something in $address_data, the value of $address_data was not
1417 passed back to the ACL. This was different to the case when no
1418 redirection occurred. The value is now passed back in both cases.
1420 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1421 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1422 use login_cap.h, so on its own it isn't the distinguishing feature. The
1423 new name refers directly to the setclassresources() function.
1425 PH/65 Added configuration files for NetBSD3.
1427 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1429 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1430 is preferred over IPv4.
1432 PH/68 The bounce_return_message and bounce_return_body options were not being
1433 honoured for bounces generated during the reception of non-SMTP messages.
1434 In particular, this applied to messages rejected by the ACL. This bug has
1435 been fixed. However, if bounce_return_message is true and bounce_return_
1436 body is false, the headers that are returned for a non-SMTP message
1437 include only those that have been read before the error was detected.
1438 (In the case of an ACL rejection, they have all been read.)
1440 PH/69 The HTML version of the specification is now built in a directory called
1441 spec_html instead of spec.html, because the latter looks like a path with
1442 a MIME-type, and this confuses some software.
1444 PH/70 Catch two compiler warnings in sieve.c.
1446 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1447 function verify_get_ident() calls ip_connect() to connect a socket, but
1448 if the "connect()" function timed out, ip_connect() used to close the
1449 socket. However, verify_get_ident() also closes the socket later, and in
1450 between Exim writes to the log, which may get opened at this point. When
1451 the socket was closed in ip_connect(), the log could get the same file
1452 descriptor number as the socket. This naturally causes chaos. The fix is
1453 not to close the socket in ip_connect(); the socket should be closed by
1454 the function that creates it. There was only one place in the code where
1455 this was missing, in the iplookup router, which I don't think anybody now
1456 uses, but I've fixed it anyway.
1458 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1459 well as to direct DNS lookups. Otherwise the handling of names in host
1460 lists is inconsistent and therefore confusing.
1466 PH/01 Two changes to the default runtime configuration:
1468 (1) Move the checks for relay_from_hosts and authenticated clients from
1469 after to before the (commented out) DNS black list checks.
1471 (2) Add control=submission to the relay_from_hosts and authenticated
1472 clients checks, on the grounds that messages accepted by these
1473 statements are most likely to be submissions.
1475 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1477 (1) Generate an error if the third argument for the ${prvs expansion is
1480 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1483 (3) Reset the variables that are obtained from the first argument of
1484 ${prvscheck and used in the second argument before leaving the code,
1485 because their memory is reclaimed, so using them afterwards may do
1488 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1489 one (it's much easier than Tom thought :-).
1491 (5) Because of (4), we can now allow for the use of $prvscheck_result
1492 inside the third argument.
1494 PH/03 For some reason, the default setting of PATH when running a command from
1495 a pipe transport was just "/usr/bin". I have changed it to
1498 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1499 anything to be listed in the output from -bV.
1501 PH/05 When a filter generated an autoreply, the entire To: header line was
1502 quoted in the delivery log line, like this:
1504 => >A.N.Other <ano@some.domain> <original@ddress> ...
1506 This has been changed so that it extracts the operative address. There
1507 may be more than one such address. If so, they are comma-separated, like
1510 => >ano@some.domain,ona@other.domain <original@ddress> ...
1512 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1513 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1514 not being looked up in the rDNS to get a host name, Exim was showing the
1515 IP address twice in Received: lines, even though the IP addresses were
1516 identical. For example:
1518 Received: from [1.2.3.4] (helo=[1.2.3.4])
1520 However, if the real host name was known, it was omitting the HELO data
1521 if it matched the actual IP address. This has been tidied up so that it
1522 doesn't show the same IP address twice.
1524 PH/07 When both +timestamp and +memory debugging was on, the value given by
1525 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1526 called by the debug printing, thereby overwriting the timestamp buffer.
1527 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1529 PH/08 When the original message was included in an autoreply transport, it
1530 always said "this is a copy of the message, including all the headers",
1531 even if body_only or headers_only was set. It now gives an appropriate
1534 PH/09 Applied a patch from the Sieve maintainer which:
1536 o fixes some comments
1537 o adds the (disabled) notify extension core
1538 o adds some debug output for the result of if/elsif tests
1539 o points to the current vacation draft in the documentation
1540 and documents the missing references header update
1544 o fixes a bug in processing the envelope test (when testing
1545 multiple envelope elements, the last element determinted the
1548 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1549 Electronic Mail") by including:
1551 Auto-submitted: auto-generated
1553 in the messages that it generates (bounce messages and others, such as
1554 warnings). In the case of bounce messages for non-SMTP mesages, there was
1555 also a typo: it was using "Auto_submitted" (underscore instead of
1556 hyphen). Since every message generated by Exim is necessarily in response
1557 to another message, thes have all been changed to:
1559 Auto-Submitted: auto-replied
1561 in accordance with these statements in the RFC:
1563 The auto-replied keyword:
1565 - SHOULD be used on messages sent in direct response to another
1566 message by an automatic process,
1568 - MUST NOT be used on manually-generated messages,
1570 - MAY be used on Delivery Status Notifications (DSNs) and Message
1571 Disposition Notifications (MDNs),
1573 - MUST NOT be used on messages generated by automatic or periodic
1574 processes, except for messages which are automatic responses to
1577 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1578 to the default Received: header definition.
1580 PH/12 Added log selector acl_warn_skipped (default on).
1582 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1583 variables because (a) they are in the wrong storage pool and (b) even if
1584 they were copied, it wouldn't work properly because of the caching.
1586 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1587 checking when decoding. Apparently there are clients that generate
1588 overlong encoded strings. Why am I not surprised?
1590 PH/15 If the first argument of "${if match_address" was not empty, but did not
1591 contain an "@" character, Exim crashed. Now it writes a panic log message
1592 and treats the condition as false.
1594 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1596 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1597 extension "envelope-auth". The code is finished and in agreement with
1598 other implementations, but there is no documentation so far and in fact,
1599 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1600 not changing the active code.
1602 Print executed "if" and "elsif" statements when debugging is used. This
1603 helps a great deal to understand what a filter does.
1605 Document more things not specified clearly in RFC3028. I had all this
1606 sorted out, when out of a sudden new issues came to my mind. Oops."
1608 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1611 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1612 canonical form (as documented). However, after a host name lookup from
1613 the IP address, check_host() was doing a simple string comparison with
1614 addresses acquired from the DNS when checking that the found name did
1615 have the original IP as one of its addresses. Since any found IPv6
1616 addresses are likely to be in abbreviated form, the comparison could
1617 fail. Luckily, there already exists a function for doing the comparison
1618 by converting both addresses to binary, so now that is used instead of
1619 the text comparison.
1621 PH/20 There was another similar case to PH/19, when a complete host name was
1622 given in a host list; looking up its IP address could give an abbreviated
1623 form, whereas the current host's name might or might not be abbreviated.
1624 The same fix has been applied.
1630 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1631 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1634 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1635 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1637 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1639 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1640 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1641 Also, for "Auto-Submitted", treat anything other than "no" as
1642 non-personal, in accordance with RFC 3834. (Previously it treated
1643 anything starting "auto-" as non-personal.)
1645 TF/01 The control=submission/name=... option had a problem with syntax
1646 errors if the name included a slash character. The /name= option
1647 now slurps the rest of the string, so it can include any characters
1648 but it must come last in the list of options (after /sender_retain
1651 PH/05 Some modifications to the interface to the fake nameserver for the new
1659 TK/01 Added the "success_on_redirect" address verification option. See
1660 NewStuff for rationale and an example.
1662 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1664 PH/02 Patch to exigrep to allow it to work on syslog lines.
1666 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1667 fread() to skip over the body file's header line, because in Cygwin the
1668 header line is locked and is inaccessible.
1670 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1671 co-exist for some time) to make it clear that it is the Exim ID that is
1672 referenced, not the Message-ID: header line.
1674 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1675 string_format() function, because snprintf() does not exist on all
1678 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1679 ${stat: expansion item.
1681 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1682 protocol synchronization error", to keep the pedants happy.
1684 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1685 well as for IRIX systems, when gcc is being used. See the host.c source
1688 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1690 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1693 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1694 transport and to the smtp transport in LMTP mode.
1696 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1698 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1699 run a filter in a subprocess. This could lead to confusion in subsequent
1700 lookups in the parent process. There should also be a search_tidyup() at
1701 the end of the subprocess.
1703 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1704 only if the host matched helo_try_verify_hosts, which caused the
1705 verification to occur when the EHLO/HELO command was issued. The ACL just
1706 tested the remembered result. Now, if a previous verification attempt has
1707 not happened, "verify = helo" does it there and then.
1709 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1711 TK/03 Fix log output including CR from clamd.
1713 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1714 exist provoked a memory error which could cause a segfault.
1716 PH/15 Installed PCRE 6.2
1718 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1720 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1721 of the problem. Specifically, suggested +O2 rather than +O1 for the
1724 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1726 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1727 record, the port was not correctly logged when the outgoing_port log
1728 selector was set (it logged the transort's default port).
1730 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1731 fallback_hosts, and "hosts" in the smtp transport.
1733 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1734 host errors such as "Connection refused".
1736 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1737 authentication with radiusclient 0.4.9:
1739 - Error returned from rc_read_config was caught wrongly
1740 - Username/password not passed on to radius server due to wrong length.
1742 The presumption is that some radiusclient API changes for 4.51/PH/17
1743 were not taken care of correctly. The code is still untested by me (my
1744 Linux distribution still has 0.3.2 of radiusclient), but it was
1745 contributed by a Radius user.
1747 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1748 expanding the "port" option of the smtp transport.
1750 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1751 while reading a MIME header. Thanks to Tom Hughes for a patch.
1753 PH/24 Include config.h inside local_scan.h so that configuration settings are
1756 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1757 that in an ACL for RCPT (for example), you can examine exactly what was
1760 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1761 commands, but it was not correctly comparing the address with the actual
1762 client host address. Thus, it would show the EHLO address in Received:
1763 header lines when this was not necessary.
1765 PH/27 Added the % operator to ${eval:}.
1767 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1768 it should be ignoring failures (because with -C, for example, it has lost
1769 privilege). It wasn't ignoring creation failures other than "already
1772 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1775 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1776 because an input line was too long, either on its own, or by virtue of
1777 too many continuations, the temporary file was not being removed, and the
1778 return code was incorrect.
1780 PH/31 Missing "BOOL" in function definition in filtertest.c.
1782 PH/32 Applied Sieve patches from the maintainer.
1784 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1786 PH/33 Added "verify = not_blind".
1788 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1789 Local/Makefile (with some defaults set). These are used in built scripts
1790 such as exicyclog, but they have never been used in the exim_install
1791 script (though there are many overriding facilities there). I have
1792 arranged that the exim_install script now takes note of these two
1795 PH/35 Installed configuration files for Dragonfly.
1797 PH/36 When a locally submitted message by a trusted user did not contain a
1798 From: header, and the sender address was obtained from -f or from an SMTP
1799 MAIL command, and the trusted user did not use -F to supply a sender
1800 name, $originator_name was incorrectly used when constructing a From:
1801 header. Furthermore, $originator_name was used for submission mode
1802 messages from external hosts without From: headers in a similar way,
1803 which is clearly wrong.
1805 PH/37 Added control=suppress_local_fixups.
1807 PH/38 When log_selector = +received_sender was set, and the addition of the
1808 sender made the log line's construction buffer exactly full, or one byte
1809 less than full, an overflow happened when the terminating "\n" was
1812 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1813 when the result of a list match is failure because a DNS lookup failed.
1815 PH/40 RM_COMMAND is now used in the building process.
1817 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1818 the "build-* directories that it finds.
1820 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1821 address in a domain literal was a prefix of an interface address.
1823 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1824 when verifying a sender address, unless rewrite_headers is false.
1826 PH/44 Wrote a long comment about why errors_to addresses are verified as
1827 recipients, not senders.
1829 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1830 the ratelimit ACL was added.
1832 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1834 PH/46 Added extra information about PostgreSQL errors to the error string.
1836 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1837 avoiding the need to install special zones in a real server. This is
1838 backwards compatible; if it can't find the fake resolver, it drops back.
1839 Thus, both old and new test suites can be run.
1841 TF/02 Added util/ratelimit.pl
1843 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1844 clock is set back in time.
1846 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1847 Candler <B.Candler@pobox.com>.
1849 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1850 OK for addresses that are the result of redirections.
1852 PH/48 A number of further additions for the benefit of the new test suite,
1853 including a fake gethostbyname() that interfaces to the fake DNS resolver
1856 TF/06 The fix for widen_domains has also been applied to qualify_single and
1857 search_parents which are the other dnslookup options that can cause
1860 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1863 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1865 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1866 service" if it encountered an MX record with an empty target hostname.
1867 The message is now "an MX or SRV record indicated no SMTP service".
1869 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1870 if the DNS of the sending site is misconfigured. This is quite a
1871 common situation. This change restores the behaviour of treating a
1872 helo verification defer as a failure.
1874 PH/51 If self=fail was set on a router, the bounce message did not include the
1875 actual error message.
1881 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1883 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1884 command itself ended in error, the underlying message about the transport
1885 filter timeout was being overwritten with the pipe command error. Now the
1886 underlying error message should be appended to the second error message.
1888 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1890 PH/02 Reduce the amount of output that "make" produces by default. Full output
1891 can still be requested.
1893 PH/03 The warning log line about a condition test deferring for a "warn" verb
1894 was being output only once per connection, rather than after each
1895 occurrence (because it was using the same function as for successful
1896 "warn" verbs). This seems wrong, so I have changed it.
1898 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1899 it should not have, which might have caused a crash in the right
1900 circumstances, but probably never did.
1902 PH/04 Installed a modified version of Tony Finch's patch to make submission
1903 mode fix the return path as well as the Sender: header line, and to
1904 add a /name= option so that you can make the user's friendly name appear
1907 TF/03 Added the control = fakedefer ACL modifier.
1909 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1910 Mark Lowes for thorough testing.
1912 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1914 TK/03 Merged latest SRS patch from Miles Wilton.
1916 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1917 with the definition in sysexits.h (which is #included earlier).
1918 Fortunately, Exim does not actually use EX_OK. The code used to try to
1919 preserve the sysexits.h value, by assumimg that macro definitions were
1920 scanned for macro replacements. I have been disabused of this notion,
1921 so now the code just undefines EX_OK before #including unistd.h.
1923 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1924 in the smtp transport. When a block could not be written in a single
1925 write() function, the timeout was being re-applied to each part-write.
1926 This seems wrong - if the receiver was accepting one byte at a time it
1927 would take for ever. The timeout is now adjusted when this happens. It
1928 doesn't have to be particularly precise.
1930 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1931 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1933 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1934 without a domain if the check to <postmaster@domain> fails.
1936 SC/01 Eximstats: added -xls and the ability to specify output files
1937 (patch written by Frank Heydlauf).
1939 SC/02 Eximstats: use FileHandles for outputing results.
1941 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1943 SC/04 Eximstats: fixed display of large numbers with -nvr option
1945 SC/05 Eximstats: fixed merging of reports with empty tables.
1947 SC/06 Eximstats: added the -include_original_destination flag
1949 SC/07 Eximstats: removed tabs and trailing whitespace.
1951 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1953 TK/06 MBOX spool code: Add real "From " MBOX separator line
1954 so the .eml file is really in mbox format (even though
1955 most programs do not really care). Patch from Alex Miller.
1957 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1958 The latter is generated from $received_to and is only set if the
1959 message has one envelope recipient. SA can use these headers,
1960 obviously out-of-the-box. Patch from Alex Miller.
1962 PH/08 The ${def test on a variable was returning false if the variable's
1963 value was "0", contrary to what the specification has always said!
1964 The result should be true unless the variable is empty.
1966 PH/09 The syntax error of a character other than { following "${if
1967 def:variable_name" (after optional whitespace) was not being diagnosed.
1968 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1969 accidental colon was present, for example, could give incorrect results.
1971 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1972 result is used (not including appendfile, where other changes are about
1975 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1976 This involved changing a lot of size variables from int to off_t. It
1977 should work with maildirs and everything.
1979 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1980 spamd dying while we are connected to it.
1982 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1985 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1986 function for BDB 4.3.
1988 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1990 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1991 the sources for PCRE have been re-arranged and more files are now
1994 PH/15 The code I had for printing potentially long long variables in PH/11
1995 above was not the best (it lost precision). The length of off_t variables
1996 is now inspected at build time, and an appropriate printing format (%ld
1997 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1998 to be "long long int" or "long int". This is needed for the internal
1999 formatting function string_vformat().
2001 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2002 the configuration file to be ":syslog", then the script "guesses" where
2003 the logs files are, rather than using the compiled in default. In our
2004 case the guess is not the same as the compiled default, so the script
2005 suddenly stopped working when I started to use syslog. The patch checks
2006 to see if log_file_path is "". If so, it attempts to read it from exim
2007 with no configuration file to get the compiled in version, before it
2008 falls back to the previous guessing code."
2010 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2011 implementing BATV in an Exim configuration. See NewStuff for the gory
2014 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2015 Makefile that are specific to HP-UX.
2017 PH/18 If the "use_postmaster" option was set for a recipient callout together
2018 with the "random" option, the postmaster address was used as the MAIL
2019 FROM address for the random test, but not for the subsequent recipient
2020 test. It is now used for both.
2022 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2023 patch removes a few documentation additions to RFC 3028, because the
2024 latest draft now contains them. It adds the new en;ascii-case comparator
2025 and a new error check for 8bit text in MIME parts. Comparator and
2026 require names are now matched exactly. I enabled the subaddress
2027 extension, but it is not well tested yet (read: it works for me)."
2029 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2030 rework some of the code of TK/09 above to avoid the hardwired use of
2031 "%lld" and "long long". Replaced the call to snprintf() with a call to
2034 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2035 records point to non-existent hosts", "retry timeout exceeded", and
2036 "retry time not reached for any host after a long failure period".
2038 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2039 experimental DomainKeys support:
2041 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2042 (2) On an error such as an illegally used "control", the wrong name for
2043 the control was given.
2045 These problems did NOT occur unless DomainKeys support was compiled.
2047 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2049 PH/24 Added ${if match_ip condition.
2051 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2052 databases so that it will be absolutely obvious if a crash occurs in the
2053 DB library. This is a regular occurrence (often caused by mis-matched
2056 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2057 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2058 picked up on a user's system that detects such things. There doesn't seem
2059 to be a gcc warning option for this - only an attribute that has to be
2060 put on the function's prototype. It seems that in Fedora Core 4 they have
2061 set this on a number of new functions. No doubt there will be more in due
2064 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2065 specify a transport. However, if an address that was verified by such a
2066 router was the subject of a callout, Exim crashed because it tried to
2067 read the rcpt_include_affixes from the non-existent transport. Now it
2068 just assumes that the setting of that option is false. This bug was
2069 introduced by 4.51/PH/31.
2071 PH/28 Changed -d+all to exclude +memory, because that information is very
2072 rarely of interest, but it makes the output a lot bigger. People tend to
2073 do -d+all out of habit.
2075 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2076 code in os-type was giving problems when libc.so lives in lib64, like on
2079 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2080 aren't the modern standard, and it seems that some systems' include files
2081 don't always have them. Exim was already checking for some of the newer
2082 ones like T_AAAA, and defining it itself. I've added checks for all the
2083 record types that Exim uses.
2085 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2086 not automatically generating a new one, as it is supposed to. This
2087 prevented TLS from working. If the file did exist, but contained invalid
2088 data, a new version was generated, as expected. It was only the case of a
2089 non-existent file that was broken.
2091 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2092 with a change in libdomainkeys > 0.64.
2094 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2095 from DNS. If the selector record carries the flag, it now has
2096 precedence over the domain-wide flag.
2098 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2100 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2101 the use of a port name that isn't defined in /etc/services) occurred, the
2102 message was deferred as in a normal delivery, and thus remained on the
2103 spool, instead of being failed because of the mua_wrapper setting. This
2104 is now fixed, and I tidied up some of the mua_wrapper messages at the
2107 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2108 the messages in a hash of arrays rather than using individual hashes.
2109 This is a bit cleaner and results in dramatic memory savings, albeit
2110 at a slight CPU cost.
2112 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2113 as requested by Marc Sherman.
2115 SC/10 Eximstats: added histograms for user specified patterns as requested
2118 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2120 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2121 fopen() in the content-scanning modules that did not already have it.
2127 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2128 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2130 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2132 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2134 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2135 to test Sieve filters that use "vacation".
2137 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2138 that changes the way the GnuTLS parameters are stored in the cache file.
2139 The new format can be generated externally. For backward compatibility,
2140 if the data in the cache doesn't make sense, Exim assumes it has read an
2141 old-format file, and it generates new data and writes a new file. This
2142 means that you can't go back to an older release without removing the
2145 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2146 work if there are any delivery delays because "one_time" forces the
2147 parent to be marked "delivered", so its unseen clone is never tried
2148 again. For this reason, Exim now forbids the simultaneous setting of
2151 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2152 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2153 entry if you want to know the details. The fix, however, neglected to
2154 consider the case when local delivery batching is involved. The test for
2155 "previously delivered" was not happening when checking to see if an
2156 address could be batched with a previous (undelivered) one; under
2157 certain circumstances this could lead to multiple deliveries to the same
2160 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2161 in its include files, and this causes problems building Exim.
2163 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2164 header_syntax) but Exim was just ignoring anything given after a slash.
2165 In particular, this caused confusion with an attempt to use "verify =
2166 reverse_host_lookup/defer_ok". An error is now given when options are
2167 supplied for verify items that do not have them. (Maybe reverse_host_
2168 lookup should have a defer_ok option, but that's a different point.)
2170 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2171 defined by RFC 821) to 2048, because there were problems with some AUTH
2172 commands, and RFC 1869 says the size should be increased for extended
2173 SMTP commands that take arguments.
2175 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2178 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2179 "unknown" error; now it says that the functionality isn't in the binary.
2181 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2182 an address' error message when a string expansion fails (syntax or
2183 whatever). Otherwise the password may appear in the log. Following change
2184 PH/42 below, there is no longer a chance of it appearing in a bounce
2187 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2189 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2190 of its addresses was ever tried. (Bugzilla bug #2.)
2192 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2193 the result incorrectly in the debug output. (It correctly added a newline
2194 to what was transported.)
2196 TF/01 Added $received_time.
2198 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2199 commented out examples of how to interface to a virus scanner and to
2200 SpamAssassin. Also added commented examples of av_scanner and
2201 spamd_address settings.
2203 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2204 and controls are allowed in which ACLs. There were a couple of minor
2205 errors. Some of the entries in the conditions table (which is a table of
2206 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2207 negation of where the condition IS allowed.
2209 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2211 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2212 header file does not have a version number, so I've had to invent a new
2213 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2214 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2215 radiusclient), but it was contributed by a Radius user.
2217 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2218 files or directories, for OpenSSL.
2220 PH/19 When an Exim process that is running as root has to create an Exim log
2221 file, it does so in a subprocess that runs as exim:exim so as to get the
2222 ownership right at creation (otherwise, other Exim processes might see
2223 the file with the wrong ownership). There was no test for failure of this
2224 fork() call, which would lead to the process getting stuck as it waited
2225 for a non-existent subprocess. Forks do occasionally fail when resources
2226 run out. I reviewed all the other calls to fork(); they all seem to check
2229 PH/20 When checking for unexpected SMTP input at connect time (before writing
2230 the banner), Exim was not dealing correctly with a non-positive return
2231 from the read() function. If the client had disconnected by this time,
2232 the result was a log entry for a synchronization error with an empty
2233 string after "input=" when read() returned zero. If read() returned -1
2234 (an event I could not check), uninitialized data bytes were printed.
2235 There were reports of junk text (parts of files, etc) appearing after
2238 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2240 PH/22 Added support for macro redefinition, and (re)definition in between
2241 driver and ACL definitions.
2243 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2244 forgetting to use the resulting value; it was using the unexpanded value.
2246 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2247 hadn't been configured. The fix is from Juergen Kreileder, who
2248 understands it better than I do:
2250 "Here's what I see happening with three configured cyrus_sasl
2251 authenticators configured (plain, login, cram-md5):
2253 On startup auth_cyrus_sasl_init() gets called for each of these.
2254 This means three calls to sasl_listmech() without a specified mech_list.
2255 => SASL tests which mechs of all available mechs actually work
2256 => three warnings about OTP not working
2257 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2259 With the patch, sasl_listmech() also gets called three times. But now
2260 SASL's mech_list option is set to the server_mech specified in the the
2261 authenticator. Or in other words, the answer from sasl_listmech()
2262 gets limited to just the mech you're testing for (which is different
2264 => the return list contains just 'plain' or 'login', 'cram-md5' or
2265 nothing depending on the value of ob->server_mech.
2267 I've just tested the patch: Authentication still works fine,
2268 unavailable mechs specified in the exim configuration are still
2269 caught, and the auth.log warnings about OTP are gone."
2271 PH/25 When debugging is enabled, the contents of the command line are added
2272 to the debugging output, even when log_selector=+arguments is not
2275 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2276 answer is "GNU", and only if the return is "GNU/something" is the answer
2279 PH/27 $acl_verify_message is now set immediately after the failure of a
2280 verification in an ACL, and so is available in subsequent modifiers. In
2281 particular, the message can be preserved by coding like this:
2283 warn !verify = sender
2284 set acl_m0 = $acl_verify_message
2286 Previously, $acl_verify_message was set only while expanding "message"
2287 and "log_message" when a very denied access.
2289 PH/28 Modified OS/os.c-Linux with
2291 -#ifndef OS_LOAD_AVERAGE
2292 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2294 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2295 nomenclature these days.)
2297 PH/29 Installed patch from the Sieve maintainer that adds the options
2298 sieve_useraddress and sieve_subaddress to the redirect router.
2300 PH/30 In these circumstances:
2301 . Two addresses routed to the same list of hosts;
2302 . First host does not offer TLS;
2303 . First host accepts first address;
2304 . First host gives temporary error to second address;
2305 . Second host offers TLS and a TLS session is established;
2306 . Second host accepts second address.
2307 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2308 and peerdn, if requested) that were in fact used only for the second
2311 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2312 attention to any local part prefix or suffix that was matched by the
2313 router that accepted the address. It now behaves in the same way as it
2314 does for delivery: the affixes are removed from the local part unless
2315 rcpt_include_affixes is set on the transport.
2317 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2318 timeout during the DATA phase of an incoming message.
2320 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2321 applied a patch sanctioned by the Sieve maintainer.
2323 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2324 the uid or gid is negative. A case of a negative gid caused this to be
2325 noticed. The fix allows for either to be negative.
2327 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2328 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2331 PH/36 The change PH/12 above was broken. Fixed it.
2333 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2334 the grounds that routing the same address twice would always produce the
2335 same answer. This might have been true once, but it is certainly no
2336 longer true now. Routing a child address may depend on the previous
2337 routing that produced that child. Some complicated redirection strategies
2338 went wrong when messages had multiple recipients, and made Exim's
2339 behaviour dependent on the order in which the addresses were given.
2341 I have moved the duplicate checking until after the routing is complete.
2342 Exim scans the addresses that are assigned to local and remote
2343 transports, and removes any duplicates. This means that more work will be
2344 done, as duplicates will always all be routed, but duplicates are
2345 presumably rare, so I don't expect this is of any significance.
2347 For deliveries to pipes, files, and autoreplies, the duplicate checking
2348 still happens during the routing process, since they are not going to be
2351 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2352 It corrects a timeout issue with spamd. This is Ian's comment: "The
2353 background is that sometimes spamd either never reads data from a
2354 connection it has accepted, or it never writes response data. The exiscan
2355 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2356 blindly assumes that writes won't block so it may never time out."
2358 PH/39 Allow G after quota size as well as K and M.
2360 PH/40 The value set for $authenticated_id in an authenticator may not contain
2361 binary zeroes or newlines because the value is written to log lines and
2362 to spool files. There was no check on this. Now the value is run through
2363 the string_printing() function so that such characters are converted to
2364 printable escape sequences.
2366 PH/41 $message_linecount is a new variable that contains the total number of
2367 lines in the message. Compare $body_linecount, which is the count for the
2370 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2371 bounce and delay warning messages, except in certain special cases, which
2374 (a) An SMTP error message from a remote host;
2375 (b) A message specified in a :fail: redirection;
2376 (c) A message specified in a "fail" command in a system filter;
2377 (d) A message specified in a FAIL return from the queryprogram router;
2378 (e) A message specified by the cannot_route_message router option.
2380 In these cases only, Exim does include the error details in bounce and
2381 warning messages. There are also a few cases where bland messages such
2382 as "unrouteable address" or "local delivery error" are given.
2384 PH/43 $value is now also set for the "else" part of a ${run expansion.
2386 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2387 being worked on, but at least Exim now implements the latest version to
2390 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2391 process to complete was treated as a delivery failure, a timeout while
2392 writing the message to the pipe was logged, but erroneously treated as a
2393 successful delivery. Such timeouts include transport filter timeouts. For
2394 consistency with the overall process timeout, these timeouts are now
2395 treated as errors, giving rise to delivery failures by default. However,
2396 there is now a new Boolean option for the pipe transport called
2397 timeout_defer, which, if set TRUE, converts the failures into defers for
2398 both kinds of timeout. A transport filter timeout is now identified in
2401 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2402 systems where "make" and "gmake" are different, calling "gmake" at top
2403 level broke things. I've arranged for the value of $(MAKE) to be passed
2404 from the Makefile to this script so that it can call the same version of
2408 A note about Exim versions 4.44 and 4.50
2409 ----------------------------------------
2411 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2412 changes of various kinds. As a consequence, a big documentation update was
2413 needed. This delayed the release for rather longer than seemed good, especially
2414 in the light of a couple of (minor) security issues. Therefore, the changes
2415 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2416 release. So 4.44 and 4.50 are in effect two different branches that both start
2419 I have left the 4.50 change log unchanged; it contains all the changes since
2420 4.43. The change log for 4.44 is below; many of its items are identical to
2421 those for 4.50. This seems to be the most sensible way to preserve the
2422 historical information.
2428 1. Minor wording change to the doc/README.SIEVE file.
2430 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2431 computation of the current number of files was incorrect.
2433 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2434 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2437 4. Give more explanation in the error message when the command for a transport
2438 filter fails to execute.
2440 5. There are several places where Exim runs a non-Exim command in a
2441 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2442 was being done only for the command run by the queryprogram router. It is
2443 now done for all such subprocesses. The other cases are: ${run, transport
2444 filters, and the commands run by the lmtp and pipe transports.
2446 6. Added CONFIGURE_GROUP build-time option.
2448 7. Some older OS have a limit of 256 on the maximum number of file
2449 descriptors. Exim was using setrlimit() to set 1000 as a large value
2450 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2451 systems. I've change it so that if it can't get 1000, it tries for 256.
2453 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2454 was an oversight, and furthermore, ever since the addition of extra
2455 controls (e.g. 4.43/32), the checks on when to allow different forms of
2456 "control" were broken. There should now be diagnostics for all cases when a
2457 control that does not make sense is encountered.
2459 9. Added the /retain_sender option to "control=submission".
2461 10. $recipients is now available in the predata ACL (oversight).
2463 11. Tidy the search cache before the fork to do a delivery from a message
2464 received from the command line. Otherwise the child will trigger a lookup
2465 failure and thereby defer the delivery if it tries to use (for example) a
2466 cached ldap connection that the parent has called unbind on.
2468 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2469 of $address_data from the recipient verification was clobbered by the
2470 sender verification.
2472 13. The value of address_data from a sender verification is now available in
2473 $sender_address_data in subsequent conditions in the ACL statement.
2475 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2477 15. Added a new option "connect=<time>" to callout options, to set a different
2480 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2481 was its contents. (It was OK if the option was not defined at all.)
2483 17. A "Completed" log line is now written for messages that are removed from
2484 the spool by the -Mrm option.
2486 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2487 information about exactly what failed.
2489 19. Added -dd to debug only the daemon process.
2491 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2492 handles timeouts, both on the server side and network timeouts. Renamed the
2493 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2495 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2496 It is now set to "smtps".
2498 22. $host_address is now set to the target address during the checking of
2499 ignore_target_hosts.
2501 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2502 being passed; this would have caused $sender_host_name to have been used if
2503 matching the list had actually called for a host name (not very likely,
2504 since this list is usually IP addresses). A host name is now passed as
2507 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2508 code that specifies a non-restarting handler (typically sigaction() in
2509 modern systems) in an attempt to fix a rare and obscure crash bug.
2511 25. Narrowed the window for a race in the daemon that could cause it to ignore
2512 SIGCHLD signals. This is not a major problem, because they are used only to
2513 wake it up if nothing else does.
2515 26. A malformed maildirsize file could cause Exim to calculate negative values
2516 for the mailbox size or file count. Odd effects could occur as a result.
2517 The maildirsize information is now recalculated if the size or filecount
2520 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2521 support for a long time. Removed HAVE_SYS_VFS_H.
2523 28. Installed the latest version of exipick from John Jetmore.
2525 29. In an address list, if the pattern was not a regular expression, an empty
2526 subject address (from a bounce message) matched only if the pattern was an
2527 empty string. Non-empty patterns were not even tested. This was the wrong
2528 because it is perfectly reasonable to use an empty address as part of a
2529 database query. An empty address is now tested by patterns that are
2530 lookups. However, all the other forms of pattern expect the subject to
2531 contain a local part and a domain, and therefore, for them, an empty
2532 address still always fails if the pattern is not itself empty.
2534 30. Exim went into a mad DNS loop when attempting to do a callout where the
2535 host was specified on an smtp transport, and looking it up yielded more
2536 than one IP address.
2538 31. Re-factored the code for checking spool and log partition space into a
2539 function that finds that data and another that does the check. The former
2540 is then used to implement four new variables: $spool_space, $log_space,
2541 $spool_inodes, and $log_inodes.
2543 32. The RFC2047 encoding function was originally intended for short strings
2544 such as real names; it was not keeping to the 75-character limit for
2545 encoded words that the RFC imposes. It now respects the limit, and
2546 generates multiple encoded words if necessary. To be on the safe side, I
2547 have increased the buffer size for the ${rfc2047: expansion operator from
2550 33. It is now permitted to omit both strings after an "if" condition; if the
2551 condition is true, the result is "true". As before, when the second string
2552 is omitted, a false condition yields an empty string. This makes it less
2553 cumbersome to write custom ACL and router conditions.
2555 34. Failure to deliver a bounce message always caused it to be frozen, even if
2556 there was an errors_to setting on the router. The errors_to setting is now
2559 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2560 canonical form (fully expanded) before being placed in
2561 $sender_host_address.
2563 36. The table in the code that translates DNS record types into text (T_A to
2564 "A" for instance) was missing entries for NS and CNAME. It is just possible
2565 that this could have caused confusion if both these types were looked up
2566 for the same domain, because the text type is used as part of Exim's
2567 per-process caching. But the chance of anyone hitting this buglet seems
2570 37. The dnsdb lookup has been extended in a number of ways.
2572 (1) There is a new type, "zns", which walks up the domain tree until it
2573 finds some nameserver records. It should be used with care.
2575 (2) There is a new type, "mxh", which is like "mx" except that it returns
2576 just the host names, not the priorities.
2578 (3) It is now possible to give a list of domains (or IP addresses) to be
2579 looked up. The behaviour when one of the lookups defers can be
2580 controlled by a keyword.
2582 (4) It is now possible to specify the separator character for use when
2583 multiple records are returned.
2585 38. The dnslists ACL condition has been extended: it is now possible to supply
2586 a list of IP addresses and/or domains to be looked up in a particular DNS
2589 39. Added log_selector=+queue_time_overall.
2591 40. When running the queue in the test harness, wait just a tad after forking a
2592 delivery process, to get repeatability of debugging output.
2594 41. Include certificate and key file names in error message when GnuTLS fails
2595 to set them up, because the GnuTLS error message doesn't include the name
2596 of the failing file when there is a problem reading it.
2598 42. Allow both -bf and -bF in the same test run.
2600 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2602 44. The "Exiscan patch" is now merged into the mainline Exim source.
2604 45. Sometimes the final signoff response after QUIT could fail to get
2605 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2606 < 0 before doing a fflush(). This bug looks as though it goes back to the
2607 introduction of TLS in release 3.20, but "sometimes" must have been rare
2608 because the tests only now provoked it.
2610 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2611 (this can affect the format of dates).
2613 47. exim_tidydb, when checking for the continued existence of a message for
2614 which it has found a message-specific retry record, was not finding
2615 messages that were in split spool directories. Consequently, it was
2616 deleting retry records that should have stayed in existence.
2618 48. Steve fixed some bugs in eximstats.
2620 49. The SPA authentication driver was not abandoning authentication and moving
2621 on to the next authenticator when an expansion was forced to fail,
2622 contradicting the general specification for all authenticators. Instead it
2623 was generating a temporary error. It now behaves as specified.
2625 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2626 (the order specifies the preference for clients). The order is now AES256,
2627 AES128, 3DES, ARCFOUR128.
2629 51. Small patch to Sieve code - explicitly set From: when generating an
2632 52. Exim crashed if a remote delivery caused a very long error message to be
2633 recorded - for instance if somebody sent an entire SpamAssassin report back
2634 as a large number of 550 error lines. This bug was coincidentally fixed by
2635 increasing the size of one of Exim's internal buffers (big_buffer) that
2636 happened as part of the Exiscan merge. However, to be on the safe side, I
2637 have made the code more robust (and fixed the comments that describe what
2640 53. Now that there can be additional text after "Completed" in log lines (if
2641 the queue_time_overall log selector is set), a one-byte patch to exigrep
2642 was needed to allow it to recognize "Completed" as not the last thing in
2645 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2646 patch that reportedly fixes this has been added. I am not expert enough to
2647 create a test for it. This is what the patch creator wrote:
2649 "I found a little strange behaviour of ldap code when working with
2650 Windows 2003 AD Domain, where users was placed in more than one
2651 Organization Units. When I tried to give exim partial DN, the exit code
2652 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2653 But simultaneously result of request was absolutely normal ldap result,
2654 so I produce this patch..."
2656 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2657 REFERENCE, so I have modified the code to exclude the patch when that macro
2660 55. Some experimental protocols are using DNS PTR records for new purposes. The
2661 keys for these records are domain names, not reversed IP addresses. The
2662 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2663 leaves it alone. Component reversal etc. now happens only for IP addresses.
2666 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2668 57. Double the size of the debug message buffer (to 2048) so that more of very
2669 long debug lines gets shown.
2671 58. The exicyclog utility now does better if the number of log files to keep
2672 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2674 59. Two changes related to the smtp_active_hostname option:
2676 (1) $smtp_active_hostname is now available as a variable.
2677 (2) The default for smtp_banner uses $smtp_active_hostname instead
2678 of $primary_hostname.
2680 60. The host_aton() function is supposed to be passed a string that is known
2681 to be a valid IP address. However, in the case of IPv6 addresses, it was
2682 not checking this. This is a hostage to fortune. Exim now panics and dies
2683 if the condition is not met. A case was found where this could be provoked
2684 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2685 components; fortuitously, this particular loophole had already been fixed
2686 by change 4.50/55 above.
2688 If there are any other similar loopholes, the new check in host_aton()
2689 itself should stop them being exploited. The report I received stated that
2690 data on the command line could provoke the exploit when Exim was running as
2691 exim, but did not say which command line option was involved. All I could
2692 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2693 running as the user.
2696 61. There was a buffer overflow vulnerability in the SPA authentication code
2697 (which came originally from the Samba project). I have added a test to the
2698 spa_base64_to_bits() function which I hope fixes it.
2701 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2702 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2704 63. The daemon start-up calls getloadavg() while still root for those OS that
2705 need the first call to be done as root, but it missed one case: when
2706 deliver_queue_load_max is set with deliver_drop_privilege. This is
2707 necessary for the benefit of the queue runner, because there is no re-exec
2708 when deliver_drop_privilege is set.
2710 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2711 This has been fixed.
2713 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2714 was in use, was not putting the data itself into the right store pool;
2715 consequently, it could be overwritten for a subsequent message in the same
2716 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2719 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2721 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2722 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2723 the function were treating the return as a boolean value, which happened to
2724 work because 0=false and not-0=true, but is not correct code.
2726 68. The host_aton() function was not handling scoped IPv6 addresses (those
2727 with, for example, "%eth0" on the end) correctly.
2729 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2730 negated items (that is, ~something) in unsigned ints. Some compilers
2731 apparently mutter when there is no cast.
2733 70. If an address verification called from an ACL failed, and did not produce a
2734 user-specific message (i.e. there was only a "system" message), nothing was
2735 put in $acl_verify_message. In this situation, it now puts the system
2738 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2739 session; change 4.31/43 added the unwanted input to the log line - except
2740 that it did not do this in the start of session case. It now does.
2742 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2743 This is wrong and can cause the other end to generate a synchronization
2744 error if it is another Exim or anything else that does the synchronization
2745 check. A QUIT command is no longer sent after a timeout.
2747 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2748 during host lookups.
2750 74. The defer_ok option of callout verification was not working if it was used
2751 when verifying addresses in header lines, that is, for this case:
2753 verify = header_sender/callout=defer_ok
2755 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2756 those file descriptors could be used for SMTP connections. If anything
2757 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2758 could be sent to the SMTP client, causing chaos. The daemon now opens
2759 stdin, stdout, and stderr to /dev/null when it puts itself into the
2762 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2763 log by default. The user can override this with suitable Perl magic.
2765 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2766 the log message when discard triggers, was not working for the DATA ACL or
2767 for the non-SMTP ACL.
2769 78. Error message wording change in sieve.c.
2771 79. If smtp_accept_max_per_host was set, the number of connections could be
2772 restricted to fewer than expected, because the daemon was trying to set up
2773 a new connection before checking whether the processes handling previous
2774 connections had finished. The check for completed processes is now done
2775 earlier. On busy systems, this bug wouldn't be noticed because something
2776 else would have woken the daemon, and it would have reaped the completed
2779 80. If a message was submitted locally by a user whose login name contained one
2780 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2781 It caused a spool format error. I have fixed the spool reading code. A
2782 related problem was that the "from" clause in the Received: line became
2783 illegal because of the space(s). It is now covered by ${quote_local_part.
2785 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2788 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2790 83. Patch from Sieve maintainer to fix unterminated string problem in
2791 "vacation" handling.
2793 84. Some minor changes to the Linux configuration files to help with other
2794 OS variants using glibc.
2796 85. One more patch for Sieve to update vacation handling to latest spec.
2799 ----------------------------------------------------
2800 See the note above about the 4.44 and 4.50 releases.
2801 ----------------------------------------------------
2807 1. Change 4.43/35 introduced a bug that caused file counts to be
2808 incorrectly computed when quota_filecount was set in an appendfile
2811 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2812 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2815 3. Give more explanation in the error message when the command for a transport
2816 filter fails to execute.
2818 4. There are several places where Exim runs a non-Exim command in a
2819 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2820 was being done only for the command run by the queryprogram router. It is
2821 now done for all such subprocesses. The other cases are: ${run, transport
2822 filters, and the commands run by the lmtp and pipe transports.
2824 5. Some older OS have a limit of 256 on the maximum number of file
2825 descriptors. Exim was using setrlimit() to set 1000 as a large value
2826 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2827 systems. I've change it so that if it can't get 1000, it tries for 256.
2829 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2830 was an oversight, and furthermore, ever since the addition of extra
2831 controls (e.g. 4.43/32), the checks on when to allow different forms of
2832 "control" were broken. There should now be diagnostics for all cases when a
2833 control that does not make sense is encountered.
2835 7. $recipients is now available in the predata ACL (oversight).
2837 8. Tidy the search cache before the fork to do a delivery from a message
2838 received from the command line. Otherwise the child will trigger a lookup
2839 failure and thereby defer the delivery if it tries to use (for example) a
2840 cached ldap connection that the parent has called unbind on.
2842 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2843 of $address_data from the recipient verification was clobbered by the
2844 sender verification.
2846 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2847 was its contents. (It was OK if the option was not defined at all.)
2849 11. A "Completed" log line is now written for messages that are removed from
2850 the spool by the -Mrm option.
2852 12. $host_address is now set to the target address during the checking of
2853 ignore_target_hosts.
2855 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2856 being passed; this would have caused $sender_host_name to have been used if
2857 matching the list had actually called for a host name (not very likely,
2858 since this list is usually IP addresses). A host name is now passed as
2861 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2862 code that specifies a non-restarting handler (typically sigaction() in
2863 modern systems) in an attempt to fix a rare and obscure crash bug.
2865 15. Narrowed the window for a race in the daemon that could cause it to ignore
2866 SIGCHLD signals. This is not a major problem, because they are used only to
2867 wake it up if nothing else does.
2869 16. A malformed maildirsize file could cause Exim to calculate negative values
2870 for the mailbox size or file count. Odd effects could occur as a result.
2871 The maildirsize information is now recalculated if the size or filecount
2874 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2875 support for a long time. Removed HAVE_SYS_VFS_H.
2877 18. Updated exipick to current release from John Jetmore.
2879 19. Allow an empty sender to be matched against a lookup in an address list.
2880 Previously the only cases considered were a regular expression, or an
2883 20. Exim went into a mad DNS lookup loop when doing a callout where the
2884 host was specified on the transport, if the DNS lookup yielded more than
2887 21. The RFC2047 encoding function was originally intended for short strings
2888 such as real names; it was not keeping to the 75-character limit for
2889 encoded words that the RFC imposes. It now respects the limit, and
2890 generates multiple encoded words if necessary. To be on the safe side, I
2891 have increased the buffer size for the ${rfc2047: expansion operator from
2894 22. Failure to deliver a bounce message always caused it to be frozen, even if
2895 there was an errors_to setting on the router. The errors_to setting is now
2898 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2899 canonical form (fully expanded) before being placed in
2900 $sender_host_address.
2902 24. Updated eximstats to version 1.33
2904 25. Include certificate and key file names in error message when GnuTLS fails
2905 to set them up, because the GnuTLS error message doesn't include the name
2906 of the failing file when there is a problem reading it.
2908 26. Expand error message when OpenSSL has problems setting up cert/key files.
2911 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2912 (this can affect the format of dates).
2914 28. exim_tidydb, when checking for the continued existence of a message for
2915 which it has found a message-specific retry record, was not finding
2916 messages that were in split spool directories. Consequently, it was
2917 deleting retry records that should have stayed in existence.
2919 29. eximstats updated to version 1.35
2920 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2921 1.35 - bugfix such that pie charts by volume are generated correctly
2923 30. The SPA authentication driver was not abandoning authentication and moving
2924 on to the next authenticator when an expansion was forced to fail,
2925 contradicting the general specification for all authenticators. Instead it
2926 was generating a temporary error. It now behaves as specified.
2928 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2929 (the order specifies the preference for clients). The order is now AES256,
2930 AES128, 3DES, ARCFOUR128.
2932 31. Small patch to Sieve code - explicitly set From: when generating an
2935 32. Exim crashed if a remote delivery caused a very long error message to be
2936 recorded - for instance if somebody sent an entire SpamAssassin report back
2937 as a large number of 550 error lines. This bug was coincidentally fixed by
2938 increasing the size of one of Exim's internal buffers (big_buffer) that
2939 happened as part of the Exiscan merge. However, to be on the safe side, I
2940 have made the code more robust (and fixed the comments that describe what
2943 33. Some experimental protocols are using DNS PTR records for new purposes. The
2944 keys for these records are domain names, not reversed IP addresses. The
2945 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2946 leaves it alone. Component reversal etc. now happens only for IP addresses.
2949 34. The host_aton() function is supposed to be passed a string that is known
2950 to be a valid IP address. However, in the case of IPv6 addresses, it was
2951 not checking this. This is a hostage to fortune. Exim now panics and dies
2952 if the condition is not met. A case was found where this could be provoked
2953 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2954 components; fortuitously, this particular loophole had already been fixed
2955 by change 4.50/55 or 4.44/33 above.
2957 If there are any other similar loopholes, the new check in host_aton()
2958 itself should stop them being exploited. The report I received stated that
2959 data on the command line could provoke the exploit when Exim was running as
2960 exim, but did not say which command line option was involved. All I could
2961 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2962 running as the user.
2965 35. There was a buffer overflow vulnerability in the SPA authentication code
2966 (which came originally from the Samba project). I have added a test to the
2967 spa_base64_to_bits() function which I hope fixes it.
2970 36. The daemon start-up calls getloadavg() while still root for those OS that
2971 need the first call to be done as root, but it missed one case: when
2972 deliver_queue_load_max is set with deliver_drop_privilege. This is
2973 necessary for the benefit of the queue runner, because there is no re-exec
2974 when deliver_drop_privilege is set.
2976 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2977 was in use, was not putting the data itself into the right store pool;
2978 consequently, it could be overwritten for a subsequent message in the same
2979 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2982 38. Sometimes the final signoff response after QUIT could fail to get
2983 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2984 < 0 before doing a fflush(). This bug looks as though it goes back to the
2985 introduction of TLS in release 3.20, but "sometimes" must have been rare
2986 because the tests only now provoked it.
2992 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2993 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2994 Now it returns an integer. A number of calls were still expecting a T/F
2995 return. Fortuitously, in all cases, the tests worked in OK situations,
2996 which is the norm. However, things would have gone wrong on any write
2997 failures on the smtp file descriptor. This function is used when sending
2998 messages over SMTP and also when doing verify callouts.
3000 2. When Exim is called to do synchronous delivery of a locally submitted
3001 message (the -odf or -odi options), it no longer closes stderr before doing
3004 3. Implemented the mua_wrapper option.
3006 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3008 5. Implemented the functions header_remove(), header_testname(),
3009 header_add_at_position(), and receive_remove_recipient(), and exported them
3012 6. If an ACL "warn" statement specified the addition of headers, Exim already
3013 inserted X-ACL-Warn: at the start if there was no header name. However, it
3014 was not making this test for the second and subsequent header lines if
3015 there were newlines in the string. This meant that an invalid header could
3016 be inserted if Exim was badly configured.
3018 7. Allow an ACL "warn" statement to add header lines at the start or after all
3019 the Received: headers, as well as at the end.
3021 8. Added the rcpt_4xx retry error code.
3023 9. Added postmaster_mailfrom=xxx to callout verification option.
3025 10. Added mailfrom=xxxx to the callout verification option, for verify=
3028 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3029 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3031 12. Inserted some casts to stop certain compilers warning when using pointer
3032 differences as field lengths or precisions in printf-type calls (mostly
3033 affecting debugging statements).
3035 13. Added optional readline() support for -be (dynamically loaded).
3037 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3038 same clock tick as a message's arrival, so that its received time was the
3039 same as the "first fail" time on the retry record, and that message
3040 remained on the queue past the ultimate address timeout, every queue runner
3041 would try a delivery (because it was past the ultimate address timeout) but
3042 after another failure, the ultimate address timeout, which should have then
3043 bounced the address, did not kick in. This was a "< instead of <=" error;
3044 in most cases the first failure would have been in the next clock tick
3045 after the received time, and all would be well.
3047 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3048 being recognized when the domain list was tested by the match_domain
3049 condition in an expansion string.
3051 16. Added the ${str2b64: operator.
3053 17. Exim was always calling setrlimit() to set a large limit for the number of
3054 processes, without checking whether the existing limit was already
3055 adequate. (It did check for the limit on file descriptors.) Furthermore,
3056 errors from getrlimit() and setrlimit() were being ignored. Now they are
3057 logged to the main and panic logs, but Exim does carry on, to try to do its
3058 job under whatever limits there are.
3060 18. Imported PCRE 5.0.
3062 19. Trivial typo in log message " temporarily refused connection" (the leading
3065 20. If the log selector return_path_on_delivery was set and an address was
3066 redirected to /dev/null, the delivery process crashed because it assumed
3067 that a return path would always be set for a "successful" delivery. In this
3068 case, the whole delivery is bypassed as an optimization, and therefore no
3071 21. Internal re-arrangement: the function for sending a challenge and reading
3072 a response while authentication was assuming a zero-terminated challenge
3073 string. It's now changed to take a pointer and a length, to allow for
3074 binary data in such strings.
3076 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3078 23. Exim was not respecting finduser_retries when seeking the login of the
3079 uid under which it was called; it was always trying 10 times. (The default
3080 setting of finduser_retries is zero.) Also, it was sleeping after the final
3081 failure, which is pointless.
3083 24. Implemented tls_on_connect_ports.
3085 25. Implemented acl_smtp_predata.
3087 26. If the domain in control=submission is set empty, Exim assumes that the
3088 authenticated id is a complete email address when it generates From: or
3089 Sender: header lines.
3091 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3092 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3093 chown and chgrp in /bin and hostname in /usr/bin.
3095 28. Exim was keeping the "process log" file open after each use, just as it
3096 does for the main log. This opens the possibility of it remaining open for
3097 long periods when the USR1 signal hits a daemon. Occasional processlog
3098 errors were reported, that could have been caused by this. Anyway, it seems
3099 much more sensible not to leave this file open at all, so that is what now
3102 29. The long-running daemon process does not normally write to the log once it
3103 has entered its main loop, and it closes the log before doing so. This is
3104 so that log files can straightforwardly be renamed and moved. However,
3105 there are a couple of unusual error situations where the daemon does write
3106 log entries, and I had neglected to close the log afterwards.
3108 30. The text of an SMTP error response that was received during a remote
3109 delivery was being truncated at 512 bytes. This is too short for some of
3110 the long messages that one sometimes sees. I've increased the limit to
3113 31. It is now possible to make retry rules that apply only when a message has a
3114 specific sender, in particular, an empty sender.
3116 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3117 it possible to be selective about when SMTP synchronization is enforced.
3119 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3121 32. Implemented hosts_connection_nolog.
3123 33. Added an ACL for QUIT.
3125 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3128 35. Added mailbox_size and mailbox_filecount to appendfile.
3130 36. Added control = no_multiline_responses to ACLs.
3132 37. There was a bug in the logic of the code that waits for the clock to tick
3133 in the case where the clock went backwards by a substantial amount such
3134 that the microsecond fraction of "now" was more than the microsecond
3135 fraction of "then" (but the whole seconds number was less).
3137 38. Added support for the libradius Radius client library this is found on
3138 FreeBSD (previously only the radiusclient library was supported).
3144 1. When certain lookups returned multiple values in the form name=value, the
3145 quoting of the values was not always being done properly. Specifically:
3146 (a) If the value started with a double quote, but contained no whitespace,
3148 (b) If the value contained whitespace other than a space character (i.e.
3149 tabs or newlines or carriage returns) it was not quoted.
3150 This fix has been applied to the mysql and pgsql lookups by writing a
3151 separate quoting function and calling it from the lookup code. The fix
3152 should probably also be applied to nisplus, ibase and oracle lookups, but
3153 since I cannot test any of those, I have not disturbed their existing code.
3155 2. A hit in the callout cache for a specific address caused a log line with no
3156 reason for rejecting RCPT. Now it says "Previous (cached) callout
3157 verification failure".
3159 3. There was an off-by-one bug in the queryprogram router. An over-long
3160 return line was truncated at 256 instead of 255 characters, thereby
3161 overflowing its buffer with the terminating zero. As well as fixing this, I
3162 have increased the buffer size to 1024 (and made a note to document this).
3164 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3165 when Exim is waiting for an SMTP response from a remote server, Exim
3166 restarts its select() call on the socket, thereby resetting its timeout.
3167 This is not a problem when such interrupts are rare. Somebody set up a cron
3168 job to run exiwhat every 2 minutes, which is less than the normal select()
3169 timeout (5 or 10 minutes). This meant that the select() timeout never
3170 kicked in because it was always reset. I have fixed this by comparing the
3171 time when an interrupt arrives with the time at the start of the first call
3172 to select(). If more time than the timeout has elapsed, the interrupt is
3173 treated as a timeout.
3175 5. Some internal re-factoring in preparation for the addition of Sieve
3176 extensions (by MH). In particular, the "personal" test is moved to a
3177 separate function, and given an option for scanning Cc: and Bcc: (which is
3178 not set for Exim filters).
3180 6. When Exim created an email address using the login of the caller as the
3181 local part (e.g. when creating a From: or Sender: header line), it was not
3182 quoting the local part when it contained special characters such as @.
3184 7. Installed new OpenBSD configuration files.
3186 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3187 try to make them clearer.
3189 9. Callout options, other than the timeout value, were being ignored when
3190 verifying sender addresses in header lines. For example, when using
3192 verify = header_sender/callout=no_cache
3194 the cache was (incorrectly) being used.
3196 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3197 only the Cygwin environment.
3199 11. When return_path_on_delivery was set as a log selector, if different remote
3200 addresses in the same message used different return paths and parallel
3201 remote delivery occurred, the wrong values would sometimes be logged.
3202 (Whenever a remote delivery process finished, the return path value from
3203 the most recently started remote delivery process was logged.)
3205 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3206 lines when AUTH and/or TLS are in use. This is the "received protocol"
3207 field. Exim used to use "asmtp" for authenticated SMTP, without any
3208 indication (in the protocol name) for TLS use. Now it follows the RFC and
3209 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3210 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3211 names appear in log lines as well as in Received: header lines.
3213 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3214 extensions, and comparison tests, and to fix some bugs.
3216 14. Changes to the "personal" filter test:
3218 (1) The test was buggy in that it was just doing the equivalent of
3219 "contains" tests on header lines. For example, if a user's address was
3220 anne@some.where, the "personal" test would incorrectly be true for
3222 To: susanne@some.where
3224 This test is now done by extracting each address from the header in turn,
3225 and checking the entire address. Other tests that are part of "personal"
3226 are now done using regular expressions (for example, to check local parts
3227 of addresses in From: header lines).
3229 (2) The list of non-personal local parts in From: addresses has been
3230 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3231 taken from the Sieve specification recommendations.
3233 (3) If the message contains any header line starting with "List-" it is
3234 treated as non-personal.
3236 (4) The test for "circular" in the Subject: header line has been removed
3237 because it now seems ill-conceived.
3239 15. Minor typos in src/EDITME comments corrected.
3241 16. Installed latest exipick from John Jetmore.
3243 17. If headers_add on a router specified a text string that was too long for
3244 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3245 of string_sprintf() is now avoided.
3247 18. $message_body_size was not set (it was always zero) when running the DATA
3248 ACL and the local_scan() function.
3250 19. For the "mail" command in an Exim filter, no default was being set for
3251 the once_repeat time, causing a random time value to be used if "once" was
3252 specified. (If the value happened to be <= 0, no repeat happened.) The
3253 default is now 0s, meaning "never repeat". The "vacation" command was OK
3254 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3255 (I found it when inspecting the code).
3257 20. There is now an overall timeout for performing a callout verification. It
3258 defaults to 4 times the callout timeout, which applies to individual SMTP
3259 commands during the callout. The overall timeout applies when there is more
3260 than one host that can be tried. The timeout is checked before trying the
3261 next host. This prevents very long delays if there are a large number of
3262 hosts and all are timing out (e.g. when the network connections are timing
3263 out). The value of the overall timeout can be changed by specifying an
3264 additional sub-option for "callout", called "maxwait". For example:
3266 verify = sender/callout=5s,maxwait=20s
3268 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3269 to the end before writing, but this should make it even safer).
3271 22. Exim was forgetting that it had advertised PIPELINING for the second and
3272 subsequent messages on an SMTP connection. It was also not resetting its
3273 memory on STARTTLS and an internal HELO.
3275 23. When Exim logs an SMTP synchronization error within a session, it now
3276 records whether PIPELINING has been advertised or not.
3278 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3279 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3280 rather than long int.
3282 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3284 26. Added the never_mail option to autoreply.
3290 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3291 crash if the getsockname() call failed; this can happen if a connection is
3292 closed very soon after it is established. The problem was simply in the
3293 order in which certain operations were done, causing Exim to try to write
3294 to the SMTP stream before it had set up the file descriptor. The bug has
3295 been fixed by making things happen in the correct order.
3301 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3302 before the connection was closed, thus losing the rejection response.
3304 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3305 some early Solaris releases, but causes trouble in current releases where
3306 socklen_t is defined.
3308 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3311 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3314 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3315 that releasing the top of it at the end releases what was used for sub-
3316 expansions (unless the block got too big). However, discard this block if
3317 the first thing is a variable or header, so that we can use its block when
3318 it is dynamic (useful for very large $message_headers, for example).
3320 6. Lookups now cache *every* query, not just the most recent. A new, separate
3321 store pool is used for this. It can be recovered when all lookup caches are
3322 flushed. Lookups now release memory at the end of their result strings.
3323 This has involved some general refactoring of the lookup sources.
3325 7. Some code has been added to the store_xxx() functions to reduce the amount
3326 of flapping under certain conditions.
3328 8. log_incoming_interface used to affect only the <= reception log lines. Now
3329 it causes the local interface and port to be added to several more SMTP log
3330 lines, for example "SMTP connection from", and rejection lines.
3332 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3334 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3336 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3337 could be overwritten at the end of the current message (or the start of a
3338 new message if it was set in a HELO ACL). The value is now preserved for
3339 the duration of the SMTP connection.
3341 12. If a transport had a headers_rewrite setting, and a matching header line
3342 contained an unqualified address, that address was qualified, even if it
3343 did not match any rewriting rules. The underlying bug was that the values
3344 of the flags that permit the existence of unqualified sender and recipient
3345 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3346 non-local messages, and by -bnq for local messages) were not being
3347 preserved with the message after it was received.
3349 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3350 "next input=" as part of the text comprising the host identity instead of
3351 the correct text. The code was using the same buffer for two different
3352 strings. However, depending on which order the printing function evaluated
3353 its arguments, the bug did not always show up. Under Linux, for example, my
3354 test suite worked just fine.
3356 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3357 doesn't work with some older versions of Perl. It has been changed to "my",
3358 which in any case is probably the better facility to use.
3360 15. A really picky compiler found some instances of statements for creating
3361 error messages that either had too many or two few arguments for the format
3364 16. The size of the buffer for calls to the DNS resolver has been increased
3365 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3366 for addresses that have a lot of PTR records. This alleviates a problem; it
3367 does not fully solve it.
3369 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3370 buffer now truncates the list and logs the incident, which is the same
3371 action as happens when Exim is looking up a host name and its aliases.
3372 Previously in this situation something unpredictable would happen;
3373 sometimes it was "internal error: store_reset failed".
3375 18. If a server dropped the connection unexpectedly when an Exim client was
3376 using GnuTLS and trying to read a response, the client delivery process
3377 crashed while trying to generate an error log message.
3379 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3380 string, for example:
3382 warn message = H1: something\nH2: something
3384 the text was added as a single header line from Exim's point of view
3385 though it ended up OK in the delivered message. However, searching for the
3386 second and subsequent header lines using $h_h2: did not work. This has been
3387 fixed. Similarly, if a system filter added multiple headers in this way,
3388 the routers could not see them.
3390 20. Expanded the error message when iplsearch is called with an invalid key to
3391 suggest using net-iplsearch in a host list.
3393 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3394 ACLs are no longer actually imposed (and a message to that effect is
3397 22. If a "gecos" field in a passwd entry contained escaped characters, in
3398 particular, if it contained a \" sequence, Exim got it wrong when building
3399 a From: or a Sender: header from that name. A second bug also caused
3400 incorrect handling when an unquoted " was present following a character
3401 that needed quoting.
3403 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3404 was not being matched caselessly.
3406 24. Arranged for all hyphens in the exim.8 source to be escaped with
3409 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3410 properly. Recipient callout cache records were still being keyed to include
3411 the sender, even when use_sender was set false. This led to far more
3412 callouts that were necessary. The sender is no longer included in the key
3413 when use_sender is false.
3415 26. Added "control = submission" modifier to ACLs.
3417 27. Added the ${base62d: operator to decode base 62 numbers.
3419 28. dnsdb lookups can now access SRV records.
3421 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3422 the configuration file.
3424 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3425 (-v) mode. This makes the output for a verbose queue run more intelligible.
3427 31. Added a use_postmaster feature to recipient callouts.
3429 32. Added the $body_zerocount variable, containing the number of binary zero
3430 bytes in the message body.
3432 33. The time of last modification of the "new" subdirectory is now used as the
3433 "mailbox time last read" when there is a quota error for a maildir
3436 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3438 35. Added +ignore_unknown as a special item in host lists.
3440 36. Code for decoding IPv6 addresses in host lists is now included, even if
3441 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3442 address was recognized as an IP address, but was then not correctly decoded
3443 into binary, causing unexpected and incorrect effects when compared with
3450 1. Very minor rewording of debugging text in manualroute to say "list of
3451 hosts" instead of "hostlist".
3453 2. If verify=header_syntax was set, and a header line with an unqualified
3454 address (no domain) and a large number of spaces between the end of the
3455 name and the colon was received, the reception process suffered a buffer
3456 overflow, and (when I tested it) crashed. This was caused by some obsolete
3457 code that should have been removed. The fix is to remove it!
3459 3. When running in the test harness, delay a bit after writing a bounce
3460 message to get a bit more predictability in the log output.
3462 4. Added a call to search_tidyup() just before forking a reception process. In
3463 theory, someone could use a lookup in the expansion of smtp_accept_max_
3464 per_host which, without the tidyup, could leave open a database connection.
3466 5. Added the variables $recipient_data and $sender_data which get set from a
3467 lookup success in an ACL "recipients" or "senders" condition, or a router
3468 "senders" option, similar to $domain_data and $local_part_data.
3470 6. Moved the writing of debug_print from before to after the "senders" test
3473 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3474 problems for message scanning, either using a data ACL, or using
3475 local_scan() because the Received: header was not generated till after they
3476 were called (in order to set the time as the time of reception completion).
3477 I have revised the way this works. The header is now generated after the
3478 body is received, but before the ACL or local_scan() are called. After they
3479 are run, the timestamp in the header is updated.
3485 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3486 before starting a queue runner without re-exec. This happened only when
3487 deliver_drop_privilege was set or when the Exim user was set to root. The
3488 effect of the bug was that timeouts during subsequent deliveries caused
3489 crashes instead of being properly handled. The handler is now left at its
3490 default (and expected) setting.
3492 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3493 message, again when deliver_drop_privilege is set or Exim is run as root.
3494 The bug described in (1) was not present in this case, but the tidying up
3495 of the other signals was missing. I have made the two cases consistent.
3497 3. The ignore_target_hosts setting on a manualroute router was being ignored
3498 for hosts that were looked up using the /MX notation.
3500 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3503 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3504 operated on the sender address. After changing the $sender_address to <>
3505 for the sender address verify, Exim was re-instated it as the original
3506 (before rewriting) address, but remembering that it had rewritten it, so it
3507 wasn't rewriting it again. This bug also had the effect of breaking the
3508 sender address verification caching when the sender address was rewritten.
3510 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3511 This has been changed so that if the ip literal address matches
3512 ignore_target_hosts, the router declines.
3514 7. Added expansion conditions match_domain, match_address, and match_local_
3515 part (NOT match_host).
3517 8. The placeholder for the Received: header didn't have a length field set.
3519 9. Added code to Exim itself and to exim_lock to test for a specific race
3520 condition that could lead to file corruption when using MBX delivery. The
3521 issue is with the lockfile that is created in /tmp. If this file is removed
3522 after a process has opened it but before that process has acquired a lock,
3523 there is the potential for a second process to recreate the file and also
3524 acquire a lock. This could lead to two Exim processes writing to the file
3525 at the same time. The added code performs the same test as UW imapd; it
3526 checks after acquiring the lock that its file descriptor still refers to
3527 the same named file.
3529 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3530 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3533 11. Added the smtp_active_hostname option. If used, this will typically be made
3534 to depend on the incoming interface address. Because $interface_address is
3535 not set up until the daemon has forked a reception process, error responses
3536 that can happen earlier (such as "too many connections") no longer contain
3539 12. If an expansion in a condition on a "warn" statement fails because a lookup
3540 defers, the "warn" statement is abandoned, and the next ACL statement is
3541 processed. Previously this caused the whole ACL to be aborted.
3543 13. Added the iplsearch lookup type.
3545 14. Added ident_timeout as a log selector.
3547 15. Added tls_certificate_verified as a log selector.
3549 16. Added a global option tls_require_ciphers (compare the smtp transport
3550 option of the same name). This controls incoming TLS connections.
3552 17. I finally figured out how to make tls_require_ciphers do a similar thing
3553 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3554 before starting the TLS session.
3556 18. Tabs are now shown as \t in -bP output.
3558 19. If the log selector return_path_on_delivery was set, Exim crashed when
3559 bouncing a message because it had too many Received: header lines.
3561 20. If two routers both had headers_remove settings, and the first one included
3562 a superfluous trailing colon, the final name in the first list and the
3563 first name in the second list were incorrectly joined into one item (with a
3564 colon in the middle).
3570 1. Added -C and -D options to the exinext utility, mainly to make it easier
3571 to include in the automated testing, but these could be helpful when
3572 multiple configurations are in use.
3574 2. The exinext utility was not formatting the output nicely when there was
3575 an alternate port involved in the retry record key, nor when there was a
3576 message id as well (for retries that were specific to a specific message
3577 and a specific host). It was also confused by IPv6 addresses, because of
3578 the additional colons they contain. I have fixed the IPv4 problem, and
3579 patched it up to do a reasonable job for IPv6.
3581 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3582 delivery, the log line now contains "pipelined" if PIPELINING was used.
3584 4. An SMTP transport process used to panic and die if the bind() call to set
3585 an explicit outgoing interface failed. This has been changed; it is now
3586 treated in the same way as a connect() failure.
3588 5. A reference to $sender_host_name in the part of a conditional expansion
3589 that was being skipped was still causing a DNS lookup. This no longer
3592 6. The def: expansion condition was not recognizing references to header lines
3593 that used bh_ and bheader_.
3595 7. Added the _cache feature to named lists.
3597 8. The code for checking quota_filecount in the appendfile transport was
3598 allowing one more file than it should have been.
3600 9. For compatibility with Sendmail, the command line option
3608 and sets the incoming protocol and host name (for trusted callers). The
3609 host name and its colon can be omitted when only the protocol is to be set.
3610 Note the Exim already has two private options, -pd and -ps, that refer to
3611 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3612 "s", but I don't think that's a major issue.
3614 10. A number of refactoring changes to the code, none of which should affect
3617 (a) The number of logging options was getting close to filling up the
3618 32-bit word that was used as a bit map. I have split them into two classes:
3619 those that are passed in the argument to log_write(), and those that are
3620 only ever tested independently outside of that function. These are now in
3621 separate 32-bit words, so there is plenty of room for expansion again.
3622 There is no change in the user interface or the logging behaviour.
3624 (b) When building, for example, log lines, the code previously used a
3625 macro that called string_cat() twice, in order to add two strings. This is
3626 not really sufficiently general. Furthermore, there was one instance where
3627 it was actually wrong because one of the argument was used twice, and in
3628 one call a function was used. (As it happened, calling the function twice
3629 did not affect the overall behaviour.) The macro has been replaced by a
3630 function that can join an arbitrary number of extra strings onto a growing
3633 (c) The code for expansion conditions now uses a table and a binary chop
3634 instead of a serial search (which was left over from when there were very
3635 few conditions). Also, it now recognizes conditions like "pam" even when
3636 the relevant support is not compiled in: a suitably worded error message is
3637 given if an attempt is made to use such a condition.
3639 11. Added ${time_interval:xxxxx}.
3641 12. A bug was causing one of the ddress fields not to be passed back correctly
3642 from remote delivery subprocesses. The field in question was not being
3643 subsequently used, so this caused to problems in practice.
3645 13. Added new log selectors queue_time and deliver_time.
3647 14. Might have fixed a bug in maildirsizefile handling that threw up
3648 "unexpected character" debug warnings, and recalculated the data
3649 unnecessarily. In any case, I expanded the warning message to give more
3652 15. Added the message "Restricted characters in address" to the statements in
3653 the default ACL that block characters like @ and % in local parts.
3655 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3656 Three changes have been made:
3658 (a) There was a serious bug; a negative response to MAIL caused the whole
3659 recipient domain to be cached as invalid, thereby blocking all messages
3660 to all local parts at the same domain, from all senders. This bug has
3661 been fixed. The domain is no longer cached after a negative response to
3662 MAIL if the sender used is not empty.
3664 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3667 (c) A new callout option, "use_sender" has been added for people who want
3668 the modified behaviour.
3674 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3677 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3678 indeed breaks things for older releases.
3680 3. Added additional logging to the case where there is a problem reading data
3681 from a filter that is running in a subprocess using a pipe, in order to
3682 try to track down a specific problem.
3684 4. Testing facility fudge: when running in the test harness and attempting
3685 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3686 getting "No route to host". Convert this to a timeout.
3688 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3691 6. Some OS don't have socklen_t but use size_t instead. This affects the
3692 fifth argument of getsockopt() amongst other things. This is now
3693 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3694 can be set for individual OS. I have set it for SunOS5, OSF1, and
3695 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3696 some earlier ones do not.
3698 7. Change 4.30/15 was not doing the test caselessly.
3700 8. The standard form for an IPv6 address literal was being rejected by address
3701 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3702 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3703 this, as well as the form without the "IPv6" on the front (but only when
3704 address literals are enabled, of course).
3706 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3708 10. Exim crashed if a message with an empty sender address specified by -f
3709 encountered a router with an errors_to setting. This could be provoked only
3710 by a command such as
3714 where an empty string was supplied; "<>" did not hit this bug.
3716 11. Installed PCRE release 4.5.
3718 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3719 remained set. It is now erased.
3721 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3722 times from message ids (which are base 36 rather than the normal 62).
3724 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3725 were being counted as actual protocol errors, and logged if the log
3726 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3727 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3728 and DATA following a set of rejected RCPTs do not count as protocol errors.
3729 In other words, Exim assumes they were pipelined, though this may not
3730 actually be the case. Of course, in all cases the client gets an
3731 appropriate error code.
3733 15. If a lookup fails in an ACL condition, a message about the failure may
3734 be available; it is used if testing the ACL cannot continue, because most
3735 such messages specify what the cause of the deferral is. However, some
3736 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3737 that caused an old message to be retained and used if a later statement
3738 caused a defer, replacing the real cause of the deferral.
3740 16. If an IP address had so many PTR records that the DNS lookup buffer
3741 was not large enough to hold them, Exim could crash while trying to process
3742 the truncated data. It now detects and logs this case.
3744 17. Further to 4.21/58, another change has been made: if (and only if) the
3745 first line of a message (the first header line) ends with CRLF, a bare LF
3746 in a subsequent header line has a space inserted after it, so as not to
3747 terminate the header.
3749 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3750 unnecessarily, used atoi() instead of strtol(), and didn't check the
3751 termination when getting file sizes from file names by regex.
3753 19. Completely re-implemented the support for maildirsize files, in the light
3754 of a number of problems with the previous contributed implementation
3755 (4.30/29). In particular:
3757 . If the quota is zero, the maildirsize file is maintained, but no quota is
3760 . If the maildir directory does not exist, it is created before any attempt
3761 to write a maildirsize file.
3763 . The quota value in the file is just a cache; if the quota is changed in
3764 the transport, the new value overrides.
3766 . A regular expression is available for excluding directories from the
3769 20. The autoreply transport checks the characters in options that define the
3770 message's headers; it allows continued headers, but it was checking with
3771 isspace() after an embedded newline instead of explicitly looking for a
3774 21. If all the "regular" hosts to which an address was routed had passed their
3775 expiry times, and had not reached their retry times, the address was
3776 bounced, even if fallback hosts were defined. Now Exim should go on to try
3779 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3780 equivalent code in the SMTP transport. Some hosts send humungous responses
3781 to HELO/EHLO, more than 1024 it seems.
3783 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3784 gives compiler warnings in some environments. I've now done it "properly",
3787 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3788 (because of problems with the built-in one) was declared to return uschar *
3789 instead of char *, causing compiler failure.
3791 25. Fixed a file descriptor leak when processing alias/forward files.
3793 26. Fixed a minor format string issue in dbfn.c.
3795 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3797 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3798 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3801 29. When a sender address is verified, it is cached, to save repeating the test
3802 when there is more than one recipient in a message. However, when the
3803 verification involves a callout, it is possible for different callout
3804 options to be set for different recipients. It is too complicated to keep
3805 track of this in the cache, so now Exim always runs a verification when a
3806 callout is required, relying on the callout cache for the optimization.
3807 The overhead is duplication of the address routing, but this should not be
3810 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3811 to be verified with callout=postmaster, and the main callout worked but the
3812 postmaster check failed, the verification correctly failed. However, if a
3813 subsequent RCPT command asked for sender verification *without* the
3814 postmaster check, incorrect caching caused this verification also to fail,
3817 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3818 it was not caching the DNS options (qualify_single, search_parents) that
3819 were used when the lookup failed. A subsequent lookup with different
3820 options therefore always gave the same answer, though there were cases
3821 where it should not have. (Example: a "domains = !$mx_any" option on a
3822 dnslookup router: the "domains" option is always processed without any
3823 widening, but the router might have qualify_single set.) Now Exim uses the
3824 cached value only when the same options are set.
3826 32. Added John Jetmore's "exipick" utility to the distribution.
3828 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3829 than a timeout (e.g. a certificate is required, and is not provided), an
3830 Exim server now closes the connection immediately. Previously it waited for
3831 the client to close - but if the client is SSL, it seems that they each
3832 wait for each other, leading to a delay before one of them times out.
3834 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3835 maintained 0.8.x compatibility because I don't think many are using it, and
3836 it is clearly obsolete.
3838 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3841 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3842 client certificate was expired. A simple patch fixes this, though I don't
3843 understand the full logic of why the verify callback is called multiple
3846 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3847 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3848 which causes problems with some clients (such as the Certicom SSL Plus
3849 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3850 disables the coutermeasure allowing Eudora to connect."
3852 38. Exim was not checking that a write() to a log file succeeded. This could
3853 lead to Bad Things if a log got too big, in particular if it hit a file
3854 size limit. Exim now panics and dies if it cannot write to a log file, just
3855 as it does if it cannot open a log file.
3857 39. Modified OS/Makefile-Linux so that it now contains
3859 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3861 The two -D definitions ensure that Exim is compiled with large file
3862 support, which makes it possible to handle log files that are bigger than
3865 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3866 instance) a domain was checked against a named list that involved a lookup,
3867 causing $domain_data to be set, then another domain was checked against the
3868 same list, then the first domain was re-checked, the value of $domain_data
3869 after the final check could be wrong. In particular, if the second check
3870 failed, it could be set empty. This bug probably also applied to
3873 41. The strip_trailing_dot option was not being applied to the address given
3874 with the -f command-line option.
3876 42. The code for reading a message's header from the spool was incrementing
3877 $received_count, but never initializing it. This meant that the value was
3878 incorrect (doubled) while delivering a message in the same process in which
3879 it was received. In the most common configuration of Exim, this never
3880 happens - a fresh exec is done - but it can happen when
3881 deliver_drop_privilege is set.
3883 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3884 it now includes up to 150 characters of the unexpected data in the log
3887 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3888 and building data strings. The size of both of these buffers was 10 000
3889 bytes - far larger than anybody would *ever* want, thought I. Needless to
3890 say, somebody hit the limit. I have increased the maximum line length to
3891 20 000 and the maximum data length of concatenated lines to 100 000. I have
3892 also fixed two bugs, because there was no checking on these buffers. Tsk,
3893 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3894 buffer is too small.
3896 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3897 lsearch lookups. Now it does.
3899 46. When parsing a route_list item in a manualroute router, a fixed-length
3900 buffer was used for the list of hosts. I made this 1024 bytes long,
3901 thinking that nobody would ever have a list of hosts that long. Wrong.
3902 Somebody had a whole pile of complicated expansion conditions, and the
3903 string was silently truncated, leading to an expansion error. It turns out
3904 that it is easier to change to an unlimited length (owing to other changes
3905 that have happened since this code was originally written) than to build
3906 structure for giving a limitation error. The length of the item that
3907 expands into the list of hosts is now unlimited.
3909 47. The lsearch lookup could not handle data where the length of text line was
3910 more than 4095 characters. Such lines were truncated, leading to shortened
3911 data being returned. It should now handle lines of any length.
3913 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3914 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3917 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3918 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3919 no longer happens in comment lines. A list of replacements is now placed
3920 at the head of all of the source files, except those whose only change is
3921 to replace PERL_COMMAND in the very first #! line.
3923 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3924 messages on the queue, with a bottom-up merge sort, using code contributed
3925 by Michael Haardt. This should make operations like -bp somewhat faster on
3926 large queues. It won't affect queue runners, except when queue_run_in_order
3929 51. Installed eximstats 1.31 in the distribution.
3931 52. Added support for SRV lookups to the dnslookup router.
3933 53. If an ACL referred to $message_body or $message_body_end, the value was not
3934 reset for any messages that followed in the same SMTP session.
3936 54. The store-handling optimization for building very long strings was not
3937 differentiating between the different store pools. I don't think this
3938 actually made any difference in practice, but I've tidied it.
3940 55. While running the routers to verify a sender address, $sender_address
3941 was still set to the sender address. This is wrong, because when routing to
3942 send a bounce to the sender, it would be empty. Therefore, I have changed
3943 it so that, while verifying a sender address, $sender_address is set to <>.
3944 (There is no change to what happens when verifying a recipient address.)
3946 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3947 target A or AAAA records (if not already returned) without resetting the
3948 qualify_single or search_parents options of the DNS resolver. These are
3949 inappropriate in this case because the targets of MX and SRV records must
3950 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3951 target that, when qualified, matched something in the local domain. These
3952 two options are now turned off when doing these lookups.
3954 57. It seems that at least some releases of Reiserfs (which does not have the
3955 concept of a fixed number of inodes) returns zero and not -1 for the
3956 number of available inodes. This interacted badly with check_spool_inodes,
3957 which assumed that -1 was the "no such thing" setting. What I have done is
3958 to check that the total number of inodes is greater than zero before doing
3959 the test of how many are available.
3961 58. When a "warn" ACL statement has a log_message modifier, the message is
3962 remembered, and not repeated. This is to avoid a lot of repetition when a
3963 message has many recipients that cause the same warning to be written.
3964 Howewer, Exim was preserving the list of already written lines for an
3965 entire SMTP session, which doesn't seem right. The memory is now reset if a
3966 new message is started.
3968 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3969 debugging output unless log_rewrite was also set.
3971 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3972 of (int)(handle) when we know that handle contains (void *)(-1).
3974 61. The Exim daemon panic-logs an error return when it closes the incoming
3975 connection. However "connection reset by peer" seems to be common, and
3976 isn't really an error worthy of noting specially, so that particular error
3979 62. When Exim is trying to find all the local interfaces, it used to panic and
3980 die if the ioctl to get the interface flags failed. However, it seems that
3981 on at least one OS (Solaris 9) it is possible to have an interface that is
3982 included in the list of interfaces, but for which you get a failure error
3983 for this call. This happens when the interface is not "plumbed" into a
3984 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3985 failure of the "get flags" call assumes that the interface is down.
3987 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3988 makes life easier for people who are doing arithmetic on fields extracted
3989 from dates, where you often get leading zeros that should not be
3990 interpreted as octal.
3992 64. Added qualify_domain to the redirect router, to override the global
3995 65. If a pathologically long header line contained very many addresses (the
3996 report of this problem mentioned 10 000) and each of them was rewritten,
3997 Exim could use up a very large amount of memory. (It kept on making new
3998 copies of the header line as it rewrote, and never released the old ones.)
3999 At the expense of a bit more processing, the header rewriting function has
4000 been changed so that it no longer eats memory in this way.
4002 66. The generation of the Received: header has been moved from the time that a
4003 message starts to be received, to the time that it finishes. The timestamp
4004 in the Received: header should now be very close to that of the <= log
4005 line. There are two side-effects of this change:
4007 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4008 logged header lines no longer include the local Received: line, because
4009 it has not yet been created. The same applies to a copy of the message
4010 that is returned to a non-SMTP sender when a message is rejected.
4012 (b) When a filter file is tested using -bf, no additional Received: header
4013 is added to the test message. After some thought, I decided that this
4016 This change does not affect the value of $received_for. It is still set
4017 after address rewriting, but before local_scan() is called.
4019 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4021 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4022 gave an unhelpful panic error message, and a defer error. I have managed to
4023 change this behaviour so that it now rejects any supplied certificate,
4024 which seems right, as the list of acceptable certificates is empty.
4026 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4027 gave an unhelpful defer error. I have not managed to make this reject any
4028 supplied certificates, but the error message it gives is "no certificate
4029 supplied", which is not helpful.
4031 70. exigrep's output now also includes lines that are not associated with any
4032 message, but which match the given pattern. Implemented by a patch from
4033 Martin Sluka, which also tidied up the Perl a bit.
4035 71. Recipient callout verification, like sender verification, was using <> in
4036 the MAIL FROM command. This isn't really the right thing, since the actual
4037 sender may affect whether the remote host accepts the recipient or not. I
4038 have changed it to use the actual sender in the callout; this means that
4039 the cache record is now keyed on a recipient/sender pair, not just the
4040 recipient address. There doesn't seem to be a real danger of callout loops,
4041 since a callout by the remote host to check the sender would use <>.
4042 [SEE ABOVE: changed after hitting problems.]
4044 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4045 temporary errors. However, in the case of such a code being given after
4046 the end of a data transmission (i.e. after ".") Exim was failing to write
4047 a retry record for the message. (Yes, there was some broken host that was
4048 actually sending 8xx at this point.)
4050 73. An unknown lookup type in a host list could cause Exim to panic-die when
4051 the list was checked. (An example that provoked this was putting <; in the
4052 middle of a list instead of at the start.) If this happened during a DATA
4053 ACL check, a -D file could be left lying around. This kind of configuration
4054 error no longer causes Exim to die; instead it causes a defer errror. The
4055 incident is still logged to the main and panic logs.
4057 74. Buglet left over from Exim 3 conversion. The message "too many messages
4058 in one connection" was written to the rejectlog but not the mainlog, except
4059 when address rewriting (yes!) was being logged.
4061 75. Added write_rejectlog option.
4063 76. When a system filter was run not as root (that is, when system_filter_user
4064 was set), the values of the $n variables were not being returned to the
4065 main process; thus, they were not subsequently available in the $sn
4068 77. Added +return_path_on_delivery log selector.
4070 78. A connection timeout was being treated differently from recipients deferred
4071 when testing hosts_max_try with a message that was older than the host's
4072 retry timeout. (The host should not be counted, thus allowing all hosts to
4073 be tried at least once before bouncing.) This may have been the cause of an
4074 occasionally reported bug whereby a message would remain on the queue
4075 longer than the retry timeout, but would be bounced if a delivery was
4076 forced. I say "may" because I never totally pinned down the problem;
4077 setting up timeout/retry tests is difficult. See also the next item.
4079 79. The ultimate address timeout was not being applied to errors that involved
4080 a combination of host plus message (for example, a timeout on a MAIL
4081 command). When an address resolved to a number of possible hosts, and they
4082 were not all tried for each delivery (e.g. because of hosts_max_try), a
4083 message could remain on the queue longer than the retry timeout.
4085 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4088 81. Fixed an obscure SMTP outgoing bug which required at least the following
4089 conditions: (a) there was another message waiting for the same server;
4090 (b) the server returned 5xx to all RCPT commands in the first message so
4091 that the message was not completed; (c) the server dropped the connection
4092 or gave a negative response to the RSET that Exim sends to abort the
4093 transaction. The observed case was a dropped connection after DATA that had
4094 been sent in pipelining mode. That is, the server had advertised PIPELINING
4095 but was not implementing it correctly. The effect of the bug was incorrect
4096 behaviour, such as trying another host, and this could lead to a crash.
4102 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4103 and daemon.c were passed as pointers to ints; they should have been
4104 pointers to socklen_t variables (which are typically unsigned ints).
4106 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4109 3. Fixed a really odd bug that affected only the testing scheme; patching a
4110 certain fixed string in the binary changed the value of another string that
4111 happened to be identical to the end of the original first string.
4113 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4114 name", it returns that address as the IP address. On some operating
4115 systems (e.g. Solaris), it also passes back the IP address string as the
4116 "host name". However, on others (e.g. Linux), it passes back an empty
4117 string. Exim wasn't checking for this, and was changing the host name to an
4118 empty string, assuming it had been canonicized.
4120 5. Although rare, it is permitted to have more than one PTR record for a given
4121 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4122 all the names associated with an address, because they do in Solaris.
4123 However, it seems that they do not in Linux for data that comes from the
4124 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4125 I found this out when I moved to a new Linux workstation and tried to run
4126 the Exim test suite.
4128 To get round this problem I have changed the code so that it now does its
4129 own call to the DNS to look up PTR records when searching for a host name.
4130 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4131 addresses that are only in /etc/hosts are still found.
4133 This behaviour is, however, controlled by an option called host_lookup_
4134 order, which defaults to "bydns:byaddr". If people want to use the other
4135 order, or indeed, just use one or the other means of lookup, they can
4136 specify it in this variable.
4138 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4139 some operating systems, this comes back from gethostbyaddr() as an empty
4140 string, and this is what Exim used to test for. However, it seems that in
4141 other systems, "." is yielded. Exim now tests for this case too.
4143 7. The values of check_spool_space and check_log_space are now held internally
4144 as a number of kilobytes instead of an absolute number of bytes. If a
4145 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4146 kilobyte. This means that much larger values can be stored.
4148 8. Exim monitor: an attempt to get the action menu when not actually pointing
4149 at a message produces an empty menu entitled "No message selected". This
4150 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4151 no entries in it ("Shell widget menu has zero width and/or height"). So I
4152 have added a single, blank menu entry in this case.
4154 9. Added ${quote_local_part.
4156 10. MIME decoding is now applied to the contents of Subject: header lines when
4159 11. Now that a reference to $sender_host_address automatically causes a reverse
4160 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4161 host lookup before query-style lookups in lists that might use this
4162 variable. This has therefore been abolished, and the "net-" prefix is no
4163 longer necessary for query-style lookups.
4165 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4166 have been a typo for LFLAGS, so it has been changed.
4168 13. The install script calls Exim with "-C /dev/null" in order to find the
4169 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4170 to be output. Howeve, since Exim outputs its version number before the
4171 error, it didn't break the script. It just looked ugly. I fixed this by
4172 always allowing "-C /dev/null" if the caller is root.
4174 14. Ignore overlarge ACL variable number when reading spool file - insurance
4175 against a later release with more variables having written the file.
4177 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4178 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4179 this, as well as the form without the "IPv6" on the front.
4181 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4182 OS/Makefile-Darwin file.
4184 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4185 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4187 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4188 variable. However, some OS use ints for inodes. I've added cast to long int
4189 to get rid of the compiler warning.
4191 19. I had forgotten to lock out "/../" in configuration file names when
4192 ALT_CONFIG_PREFIX was set.
4194 20. Routers used for verification do not need to specify transports. However,
4195 if such a router generated a host list, and callout was configured, Exim
4196 crashed, because it could not find a port number from the (non-existent)
4197 transport. It now assumes port 25 in this circumstance.
4199 21. Added the -t option to exigrep.
4201 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4202 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4203 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4204 them is set, LOOKUP_LSEARCH is forced.
4206 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4208 24. Added sender and host information to the "rejected by local_scan()" log
4209 line; previously there was no indication of these.
4211 25. Added .include_if_exists.
4213 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4214 Linux. It turns out that not all file systems support this. Apparently some
4215 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4216 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4217 not supported on the file descriptor, is now ignored when Exim is trying to
4218 sync a directory. This applies only to Linux.
4220 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4222 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4223 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4226 29. Added support for maildirsize files from supplied patch (modified a bit).
4228 30. The use of :fail: followed by an empty string could lead Exim to respond to
4229 sender verification failures with (e.g.):
4231 550 Verification failed for <xxx>
4232 550 Sender verify failed
4234 where the first response line was missing the '-' that indicates it is not
4235 the final line of the response.
4237 31. The loop for finding the name of the user that called Exim had a hardwired
4238 limit of 10; it now uses the value of finduser_retries, which is used for
4239 all other user lookups.
4241 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4244 33. Exim was neglecting to zero errno before one call of strtol() when
4245 expanding a string and expecting an integer value. On some systems this
4246 resulted in spurious "integer overflow" errors. Also, it was casting the
4247 result into an int without checking.
4249 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4250 did not work. The code looks as if it has *never* worked, though it appears
4251 to have been documented since at least releast 1.62. I have made it work.
4253 35. The "timeout_DNS" error in retry rules, also documented since at least
4254 1.62, also never worked. As it isn't clear exactly what this means, and
4255 clearly it isn't a major issue, I have abolished the feature by treating it
4256 as "timeout", and writing a warning to the main and panic logs.
4258 36. The display of retry rules for -brt wasn't always showing the error code
4261 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4262 timeout_connect_A, timeout_connect_MX.
4264 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4265 to the empty sender.
4267 39. The daemon was not analysing the content of -oX till after it had closed
4268 stderr and disconnected from the controlling terminal. This meant that any
4269 syntax errors were only noted on the panic log, and the return code from
4270 the command was 0. By re-arranging the code a little, I've made the
4271 decoding happen first, so such errors now appear on stderr, and the return
4272 code is 1. However, the actual setting up of the sockets still happens in
4273 the disconnected process, so errors there are still only recorded on the
4276 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4277 connections (as happens on some IP stacks) was logged at start up time as
4278 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4279 it from "IPv6 and IPv4", which means that two separate sockets are being
4282 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4283 says whether AF_INET or AF_INET6 was passed as an argument.
4285 42. Exiwhat output was messed up when time zones were included in log
4288 43. Exiwhat now gives more information about the daemon's listening ports,
4289 and whether -tls-on-connect was used.
4291 44. The "port" option of the smtp transport is now expanded.
4293 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4294 silently ignored. Now an error message is written to the main and panic
4297 46. There's a new ACL modifier called "logwrite" which writes to a log file
4298 as soon as it is encountered.
4300 47. Added $local_user_uid and $local_user_gid at routing time.
4302 48. Exim crashed when trying to verify a sender address that was being
4305 49. Exim was recognizing only a space character after ".include". It now also
4306 recognizes a tab character.
4308 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4309 extracting the relevant information from the specification. The man page no
4310 longer contains scrambled data for the -d option, and I've added a section
4311 at the front about calling Exim under different names.
4313 51. Added "extra_headers" argument to the "mail" command in filter files.
4315 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4318 53. Installed eximstats 1.29.
4320 54. Added transport_filter_timeout as a generic transport option.
4322 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4323 Cc: header lines. This was required by RFC 822, but it not required by RFC
4326 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4327 incoming messages that did not have them. Now it does so only if the
4328 message originates locally, that is, if there is no associated remote host
4329 address. When Resent- header lines are present, this applies to the Resent-
4330 lines rather than the non-Resent- lines.
4332 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4333 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4335 58. Messages for configuration errors now include the name of the main
4336 configuration file - useful now that there may be more than one file in a
4337 list (.included file names were always shown).
4339 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4340 for those rare installations that do not start the daemon as root or run it
4341 setuid root. I've cut out the call to initgroups() if the daemon is not
4344 60. The Exim user and group can now be bound into the binary as text strings
4345 that are looked up at the start of Exim's processing.
4347 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4349 62. Added $mailstore_basename variable.
4351 63. Installed patch to sieve.c from Michael Haardt.
4353 64. When Exim failed to open the panic log after failing to open the main log,
4354 the original message it was trying to log was written to stderr and debug
4355 output, but if they were not available (the usual case in production), it
4356 was lost. Now it is written to syslog before the two lines that record the
4357 failures to open the logs.
4359 65. Users' Exim filters run in subprocesses under the user's uid. It is
4360 possible for a "deliver" command or an alias in a "personal" command to
4361 provoke an address rewrite. If logging of address rewriting is configured,
4362 this fails because the process is not running as root or exim. There may be
4363 a better way of dealing with this, but for the moment (because 4.30 needs
4364 to be released), I have disabled address rewrite logging when running a
4365 filter in a non-root, non-exim process.
4371 1. The buildconfig auxiliary program wasn't quoting the value set for
4372 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4373 not defined. This bug was masked in 4.22 by the effect that was fixed in
4376 2. Some messages that were rejected after a message id was allocated were
4377 shown as "incomplete" by exigrep. It no longer does this for messages that
4378 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4380 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4381 have allow_domain_literals set, the ID did not get logged in the <= line.
4382 Domain literals are now always recognized in Message-ID: header lines.
4384 4. The first argument for a ${extract expansion item is the key name or field
4385 number. Leading and trailing spaces in this item were not being ignored,
4386 causing some misleading effects.
4388 5. When deliver_drop_privilege was set, single queue runner processes started
4389 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4390 same command in the process it spins off) were not dropping privilege.
4392 6. When the daemon running as "exim" started a queue runner, it always
4393 re-executed Exim in the spun-off process. This is a waste of effort when
4394 deliver_drop_privilege is set. The new process now just calls the
4395 queue-runner function directly.
4401 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4404 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4405 ignored. Though the use of -oP was forcing the writing of a pid file, it
4406 was always written to the default place.
4408 3. If the message "no IP address found for host xxxx" is generated during
4409 incoming verification, it is now followed by identification of the incoming
4410 connection (so you can more easily find what provoked it).
4412 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4414 5. Added some features to "harden" Exim a bit more against certain attacks:
4416 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4417 be put in Local/Makefile. This is like the never_users runtime option,
4418 but it cannot be overridden. The default setting is "root".
4420 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4421 prefix string with which any file named in a -C command line option
4424 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4425 is retained for -C and -D only if the caller of Exim is root. Without
4426 it, the exim user may also use -C and -D and retain privilege.
4428 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4429 command line option is disabled.
4431 6. Macro names set by the -D option must start with an upper case letter, just
4432 like macro names defined in the configuration file.
4434 7. Added "dereference=" facility to LDAP.
4436 8. Two instances of the typo "uknown" in the source files are fixed.
4438 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4439 the Configure-Makefile script screwed up while processing it.
4441 10. Incorporated PCRE 4.4.
4443 11. The SMTP synchronization check was not operating right at the start of an
4444 SMTP session. For example, it could not catch a HELO sent before the client
4445 waited for the greeting. There is now a check for outstanding input at the
4446 point when the greeting is written. Because of the duplex, asynchronous
4447 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4448 way, but not yet received, when the check is performed.
4450 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4451 on TCP/IP sockets, because this apparently causes some broken clients to
4454 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4455 unchanged) from the Cygwin maintainer.
4457 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4458 was supported instead of testing for mbx. Effectively a typo.
4460 15. The spa authenticator server code was not checking that the input it
4461 received was valid base64.
4463 16. The debug output line for the "set" modifier in ACLs was not showing the
4464 name of the variable that was being set.
4466 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4468 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4469 lookup on its own. Something else was needed to trigger the lookup. For
4470 example, a match in host_lookup or the need for a host name in a host list.
4471 Now, if $sender_host_name is referenced and the host name has not yet been
4472 looked up, a lookup is performed. If the lookup fails, the variable remains
4473 empty, and $host_lookup_failed is set to "1".
4475 19. Added "eqi" as a case-independent comparison operator.
4477 20. The saslauthd authentication condition could segfault if neither service
4478 nor realm was specified.
4480 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4481 error message that was logged was misleading, and incoming SMTP
4482 connections were dropped. The message is now more accurate, and temporary
4483 errors are given to SMTP connections.
4485 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4486 (except RSET) with a 421 error, until QUIT is received. However, it was
4487 failing to send a response to QUIT.
4489 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4490 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4491 ACL is now run after the helo_try_verify_hosts code.
4493 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4494 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4495 case-independent, so other case variants are also recognized). Apparently
4496 some systems use these upper case variants.
4498 25. If more than two messages were waiting for the same host, and a transport
4499 filter was specified for the transport, Exim sent two messages over the
4500 same TCP/IP connection, and then failed with "socket operation on non-
4501 socket" when it tried to send the third.
4503 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4505 27. The extern definition of crypt16() in expand.c was not being excluded when
4506 the OS had its own crypt16() function.
4508 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4509 as a preferred synonym for return_size_limit, both as an option and as an
4512 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4514 30. Changed the default configuration ACL to relax the local part checking rule
4515 for addresses that are not in any local domains. For these addresses,
4516 slashes and pipe symbols are allowed within local parts, but the sequence
4517 /../ is explicitly forbidden.
4519 31. SPA server authentication was not clearing the challenge buffer before
4522 32. log_message in a "warn" ACL statement was writing to the reject log as
4523 well as to the main log, which contradicts the documentation and doesn't
4524 seem right (because no rejection is happening). So I have stopped it.
4526 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4527 However, I am unable to do any testing of this.
4529 34. Fixed an infelicity in the appendfile transport. When checking directories
4530 for a mailbox, to see if any needed to be created, it was accidentally
4531 using path names with one or more superfluous leading slashes; tracing
4532 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4534 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4535 contents are added to the log line that is written for every discarded
4536 recipient. (Previously a log_message setting was ignored.)
4538 36. The ${quote: operator now quotes the string if it is empty.
4540 37. The install script runs exim in order to find its version number. If for
4541 some reason other than non-existence or emptiness, which it checks, it
4542 could not run './exim', it was installing it with an empty version number,
4543 i.e. as "exim-". This error state is now caught, and the installation is
4546 38. An argument was missing from the function that creates an error message
4547 when Exim fails to connect to the socket for saslauthd authentication.
4548 This could cause Exim to crash, or give a corrupted message.
4550 39. Added isip, isip4, and isip6 to ${if conditions.
4552 40. The ACL variables $acl_xx are now saved with the message, and can be
4553 accessed later in routers, transports, and filters.
4555 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4556 strings in the file are not string-expanded.
4558 42. If a MAIL command specified a SIZE value that was too large to fit into an
4559 int variable, the check against message_size_limit failed. Such values are
4560 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4561 day this will have to be increased, but I don't think I want to be around
4562 when emails are that large.
4569 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4570 iconv() is not standard in FreeBSD.
4572 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4573 IPv6 enabled. The observed symptom was a segmentation fault on return from
4574 the function os_common_find_running_interfaces() in src/os.c.
4576 3. In the check_special_case() function in daemon.c I had used "errno" as an
4577 argument name, which causes warnings on some systems. This was basically a
4578 typo, since it was named "eno" in the comments!
4580 4. The code that waits for the clock to tick (at a resolution of some fraction
4581 of a second) so as to ensure message-id uniqueness was always waiting for
4582 at least one whole tick, when it could have waited for less. [This is
4583 almost certainly not relevant at current processor speeds, where it is
4584 unlikely to ever wait at all. But we try to future-proof.]
4586 5. The function that sleeps for a time interval that includes fractions of a
4587 second contained a race. It did not block SIGALRM between setting the
4588 timer, and suspending (a couple of lines later). If the interval was short
4589 and the sigsuspend() was delayed until after it had expired, the suspension
4590 never ended. On busy systems this could lead to processes getting stuck for
4593 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4594 process, before it forks any delivery processes. The open lookup caching
4595 mechanism meant that the open file or database connection was passed into
4596 the delivery process. The problem was that delivery processes always tidy
4597 up cached lookup data. This could cause a problem for the next delivery
4598 process started by the queue runner, because the external queue runner
4599 process does not know about the closure. So the next delivery process
4600 still has data in the lookup cache. In the case of a file lookup, there was
4601 no problem because closing a file descriptor in a subprocess doesn't affect
4602 the parent. However, if the lookup was caching a connection to a database,
4603 the connection was closed, and the second delivery process was likely to
4604 see errors such as "PGSQL: query failed: server closed the connection
4605 unexpectedly". The problem has been fixed by closing all cached lookups
4606 in a queue runner before running a delivery process.
4608 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4609 seem to have the "const" qualifier which it has on other OS. I've
4612 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4613 *of the same type* (client or server) with the same public name that an
4614 error should be diagnosed.
4616 9. When Exim looked up a host name for an IP address, but failed to find the
4617 original IP address when looking up the host name (a safety check), it
4618 output the message "<ip address> does not match any IP for NULL", which was
4619 confusing, to say the least. The bug was that the host name should have
4620 appeared instead of "NULL".
4622 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4623 user that is built into the binary, and the -C or -D options is used, root
4624 privilege is dropped before the configuration file is read. In addition,
4625 logging is switched to stderr instead of the normal log files. If the
4626 configuration then re-defines the Exim user, the unprivileged environment
4627 is probably not what is expected, so Exim logs a panic warning message (but
4630 However, if deliver_drop_privilege is set, the unprivileged state may well
4631 be exactly what is intended, so the warning has been cut out in that case,
4632 and Exim is allowed to try to write to its normal log files.
4638 1. smtp_return_error_details was not giving details for temporary sender
4639 or receiver verification errors.
4641 2. Diagnose a configuration error if two authenticators have the same public
4644 3. Exim used not to create the message log file for a message until the first
4645 delivery attempt. This could be confusing when incoming messages were held
4646 for policy or load reasons. The message log file is now created at the time
4647 the message is received, and an initial "Received" line is written to it.
4649 4. The automatically generated man page for command line options had a minor
4650 bug that caused no ill effects; however, a more serious problem was that
4651 the procedure for building the man page automatically didn't always
4652 operate. Consequently, release 4.20 contains an out-of-date version. This
4653 shouldn't happen again.
4655 5. When building Exim with embedded Perl support, the script that builds the
4656 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4657 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4659 6. The freeze_tell option was not being used for messages that were frozen on
4660 arrival, either by an ACL or by local_scan().
4662 7. Added the smtp_incomplete_transaction log selector.
4664 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4665 was accepting AUTH without a new EHLO.
4667 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4668 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4671 10. Logging of TCP/IP connections (when configured) now happens in the main
4672 daemon process instead of the child process, so that the TCP/IP connection
4673 count is more accurate (but it can never be perfect).
4675 11. The use of "drop" in a nested ACL was not being handled correctly in the
4676 outer ACL. Now, if condition failure induced by the nested "drop" causes
4677 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4678 or "require"), the connection is dropped.
4680 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4681 that yield "discard" can now be used with an "accept" or a "discard" verb,
4682 but an error is generated for any others (because I can't see a useful way
4683 to define what should happen).
4685 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4686 are now processed in the same way as lines in the Exim configuration file.
4687 In particular, continuation lines are supported.
4689 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4691 15. Added -ti meaning -t -i.
4693 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4694 domains, and warn by logging if others are found.
4696 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4697 returned from GIFCONF when Exim is trying to find the list of interfaces on
4698 a host. The code in os.c has been modified to copy each ifreq to an aligned
4699 structure in all cases.
4701 Also, in some cases, the returned ifreq's were being copied to a 'struct
4702 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4703 means the last couple of bytes of an IPv6 address could be chopped if the
4704 ifreq contained only a normal sockaddr (14 bytes storage).
4706 18. Named domain lists were not supported in the hosts_treat_as_local option.
4707 An entry such as +xxxx was not recognized, and was treated as a literal
4710 19. Ensure that header lines added by a DATA ACL are included in the reject log
4711 if the ACL subsequently rejects the message.
4713 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4714 MD5 (which is deprecated).
4716 21. When testing a filter file using -bf, Exim was writing a message when it
4717 took the sender from a "From " line in the message, but it was not doing so
4718 when it took $return_path from a Return-Path: header line. It now does.
4720 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4721 with a valid header line field name (a series of printing characters
4722 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4724 23. Changed "disc" in the source to "disk" to conform to the documentation and
4725 the book and for uniformity.
4727 24. Ignore Sendmail's -Ooption=value command line item.
4729 25. When execve() failed while trying to run a command in a pipe transport,
4730 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4731 could be confused with a return value of 69 from the command itself. This
4732 has been changed to 127, the value the shell returns if it is asked to run
4733 a non-existent command. The wording for the related log line suggests a
4734 non-existent command as the problem.
4736 26. If received_header_text expands to an empty string, do not add a Received:
4737 header line to the message. (Well, it adds a token one on the spool, but
4738 marks it "old" so that it doesn't get used or transmitted.)
4740 27. Installed eximstats 1.28 (addition of -nt option).
4742 28. There was no check for failure on the call to getsockname() in the daemon
4743 code. This can fail if there is a shortage of resources on the system, with
4744 ENOMEM, for example. A temporary error is now given on failure.
4746 29. Contrary to the C standard, it seems that in some environments, the
4747 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4748 program. Exim now does this explicitly; it affects the formatting of
4749 timestamps using strftime().
4751 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4752 complaints. I've now initialized all the variables, to avoid this.
4754 32. Header lines added by a system filter were not being "seen" during
4755 transport-time rewrites.
4757 33. The info_callback() function passed to OpenSSL is set up with type void
4758 (*)(SSL *, int, int), as described somewhere. However, when calling the
4759 function (actually a macro) that sets it up, the type void(*)() is
4760 expected. I've put in a cast to prevent warnings from picky compilers.
4762 34. If a DNS black list lookup found a CNAME record, but there were no A
4763 records associated with the domain it pointed at, Exim crashed.
4765 35. If a DNS black list lookup returned more than one A record, Exim ignored
4766 all but the first. It now scans all returned addresses if a particular IP
4767 value is being sought. In this situation, the contents of the
4768 $dnslist_value variable are a list of all the addresses, separated by a
4771 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4772 to accept a host name and all its aliases if the forward lookup for any of
4773 them yielded the IP address of the incoming connection. Now it accepts only
4774 those names whose forward lookup yields the correct IP address. Any other
4775 names are discarded. This closes a loophole whereby a rogue DNS
4776 administrator could create reverse DNS records to break through a
4777 wildcarded host restriction in an ACL.
4779 37. If a user filter or a system filter that ran in a subprocess used any of
4780 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4781 the wrong values were passed to the pipe command ($thisaddress had the
4782 value of $0, $0 had the value of $1, etc). This bug was introduced by
4783 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4785 38. Improved the line breaking for long SMTP error messages from ACLs.
4786 Previously, if there was no break point between 40 and 75 characters, Exim
4787 left the rest of the message alone. Two changes have been made: (a) I've
4788 reduced the minimum length to 35 characters; (b) if it can't find a break
4789 point between 35 and 75 characters, it looks ahead and uses the first one
4790 that it finds. This may give the occasional overlong line, but at least the
4791 remaining text gets split now.
4793 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4794 file descriptors might be low, and that setting 1000 would always raise it.
4795 It turns out that in some environments, the limit is already over 1000 and
4796 that lowering it causes trouble. So now Exim takes care not to decrease it.
4798 40. When delivering a message, the value of $return_path is set to $sender_
4799 address at the start of routing (routers may change the value). By an
4800 oversight, this default was not being set up when an address was tested by
4801 -bt or -bv, which affected the outcome if any router or filter referred to
4804 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4805 log only when "message" or "log_message" are set. However, if one of the
4806 conditions was an address verification, or a call to a nested ACL, the
4807 messages generated by the underlying test were being passed through. This
4808 no longer happens. The underlying message is available in $acl_verify_
4809 message for both "message" and "log_message" expansions, so it can be
4810 passed through if needed.
4812 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4813 new expansion $bh_ to give the encoded byte string without charset
4814 translation. Translation happens only if iconv() is available; HAVE_ICONV
4815 indicates this at build time. HEADERS_CHARSET gives the charset to
4816 translate to; headers_charset can change it in the configuration, and
4817 "headers charset" can change it in an individual filter file.
4819 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4820 that creates RFC 2047 encoded "words" labels them as that charset instead
4821 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4822 expansion operator; (ii) when Exim creates a From: line for a local
4823 message; (iii) when a header line is rewritten to include a "phrase" part.
4825 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4826 buggy, causing it to skip the first lines of messages whose message ID
4827 ended in 'D'. This would not have bitten before Exim release 4.14, because
4828 message IDs were unlikely to end in 'D' before then. The effect was to have
4829 incorrect size information for certain domains.
4831 45. #include "config.h" was missing at the start of the crypt16.c module. This
4832 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4835 46. If there was a timeout during a "random" callout check, Exim treated it as
4836 a failure of the random address, and carried on sending RSET and the real
4837 address. If the delay was just some slowness somewhere, the response to the
4838 original RCPT would be taken as a response to RSET and so on, causing
4839 mayhem of various kinds.
4841 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4842 when I implemented it. It didn't allow for the fact that some option values
4843 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4844 the right test for positive values.
4846 48. Domain names in DNS records are case-independent. Exim always looks them up
4847 in lower case. Some resolvers return domain names in exactly the case they
4848 appear in the zone file, that is, they may contain uppercase letters. Not
4849 all resolvers do this - some return always lower case. Exim was treating a
4850 change of case by a resolver as a change of domain, similar to a widening
4851 of a domain abbreviation. This triggered its re-routing code and so it was
4852 trying to route what was effectively the same domain again. This normally
4853 caused routing to fail (because the router wouldn't handle the domain
4854 twice). Now Exim checks for this case specially, and just changes the
4855 casing of the domain that it ultimately uses when it transmits the message
4858 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4861 50. If a filter generated a file delivery with a non-absolute name (possible if
4862 no home directory exists for the router), the forbid_file option was not
4865 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4866 the existing equality matching.
4868 52. Exim was using ints instead of ino_t variables in some places where it was
4869 dealing with inode numbers.
4871 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4872 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4873 called TMPDIR, and if it finds it is different, it changes its value.
4875 54. The smtp_printf() function is now made available to local_scan() so
4876 additional output lines can be written before returning. There is also an
4877 smtp_fflush() function to enable the detection of a dropped connection.
4878 The variables smtp_input and smtp_batched_input are exported to
4881 55. Changed the default runtime configuration: the message "Unknown user"
4882 has been removed from the ACL, and instead placed on the localuser router,
4883 using the cannot_route_message feature. This means that any verification
4884 failures that generate their own messages won't get overridden. Similarly,
4885 the "Unrouteable address" message that was in the ACL for unverifiable
4886 relay addresses has also been removed.
4888 56. Added hosts_avoid_esmtp to the smtp transport.
4890 57. The exicyclog script was not checking for the esoteric option
4891 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4892 will work only if exicyclog is run under the appropriate euid.
4894 58. Following a discussion on the list, the rules by which Exim recognises line
4895 endings on incoming messages have been changed. The -dropcr and drop_cr
4896 options are now no-ops, retained only for backwards compatibility. The
4897 following line terminators are recognized: LF CRLF CR. However, special
4898 processing applies to CR:
4900 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4901 nor a local message in the state where . is a terminator.
4903 (ii) If a bare CR is encountered in a header line, an extra space is added
4904 after the line terminator so as not to end the header. The reasoning
4905 behind this is that bare CRs in header lines are most likely either
4906 to be mistakes, or people trying to play silly games.
4908 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4909 was being incorrectly given as 18 bytes larger than it should have been.
4910 This is a VOB (very old bug).
4912 60. This may never have affected anything current, but just in case it has:
4913 When the local host is found other than at the start of a list of hosts,
4914 the local host, those with the same MX, and any that follow, are discarded.
4915 When the list in question was part of a longer list of hosts, the following
4916 hosts (not currently being processed) were also being discarded. This no
4917 longer happens. I'm not sure if this situation could ever has previously
4920 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4923 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4924 header. This is something that is recommended in a new Internet Draft, and
4925 is something that is documented as being done by Sendmail. There are two
4926 possible values. For messages generated by the autoreply transport, Exim
4929 Auto-Submitted: auto-replied
4931 whereas for all other generated messages (e.g. bounces) it adds
4933 Auto-Submitted: auto-generated
4935 63. The "personal" condition in filters now includes a test for the
4936 Auto-Submitted: header. If it contains the string "auto-" the message it
4937 not considered personal.
4939 64. Added rcpt_include_affixes as a generic transport option.
4941 65. Added queue_only_override (default true).
4943 66. Added the syslog_duplication option.
4945 67. If what should have been the first header line of a message consisted of
4946 a space followed by a colon, Exim was mis-interpreting it as a header line.
4947 It isn't of course - it is syntactically invalid and should therefore be
4948 treated as the start of the message body. The misbehaviour could have
4949 caused a number of strange effects, including loss of data in subsequent
4950 header lines, and spool format errors.
4952 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4953 client host had authenticated. This control can now be exercised by an ACL
4954 for more flexibility.
4956 69. By default, callouts do not happen when testing with -bh. There is now a
4957 variant, -bhc, which does actually run the callout code, including
4958 consulting and updating the callout cache.
4960 70. Added support for saslauthd authentication, courtesy of Alexander
4963 71. If statvfs() failed on the spool or log directories while checking their
4964 size for availability, Exim confusingly gave the error "space shortage".
4965 Furthermore, in debugging mode it crashed with a floating point exception.
4966 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4967 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4968 serious problem, Exim now writes to the main and panic logs when this
4969 happens, with details of the failure. It then refuses to accept the
4970 incoming message, giving the message "spool directory problem" or "log
4971 directory problem" with a 421 code for SMTP messages.
4973 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4974 0, 1, and 2 exist, because some OS complain for execs without them (see
4975 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4976 descriptors. However, the code omitted to check that the open succeeded,
4977 causing mysterious errors if for some reason the permissions on /dev/null
4978 got screwed. Now Exim writes a message to the main and panic logs, and
4979 bombs out if it can't open /dev/null.
4981 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4982 interact so that it is all more flexible. It is supposed to remain
4983 backwards compatible. Also added extra_local_interfaces.
4985 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4986 to bomb out with an assertion failure - to the client this appears as a
4987 connection drop. This problem occurs in the part of the code that was taken
4988 from the Samba project. Fortunately, the assertion is in a very simple
4989 function, so I have fixed this by reproducing the function inline in the
4990 one place where it is called, and arranging for authentication to fail
4991 instead of killing the process with assert().
4993 75. The SPA client code was not working when the server requested OEM rather
4994 than Unicode encoding.
4996 76. Added code to make require_files with a specific uid setting more usable in
4997 the case where statting the file as root fails - usually a non-root-mounted
4998 NFS file system. When this happens and the failure is EACCES, Exim now
4999 forks a subprocess and does the per-uid checking as the relevant uid.
5001 77. Added process_log_path.
5003 78. If log_file_path was not explicitly set, a setting of check_log_space or
5004 check_log_inodes was ignored.
5006 79. If a space check for the spool or log partitions fails, the incident is now
5007 logged. Of course, in the latter case the data may get lost...
5009 80. Added the %p formatting code to string_format() so that it can be used to
5010 print addresses in debug_print(). Adjusted all the address printing in the
5011 debugging in store.c to use %p rather than %d.
5013 81. There was a concern that a line of code in smtp_in.c could overflow a
5014 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5015 initially expressed, the concern was not well-founded, because trailing
5016 spaces are removed early. However, if the trailing spaces were followed by
5017 a NULL, they did not get removed, so the overflow was possible. Two fixes
5020 (a) I re-wrote the offending code in a cleaner fashion.
5021 (b) If an incoming SMTP command contains a NULL character, it is rejected
5024 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5025 runs initgroups(), so that if the Exim user is in any additional groups,
5026 they will be used during message reception.
5032 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob