1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.602 2010/03/05 16:03:59 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
11 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
13 NM/01 Bugzilla 965: Support mysql stored procedures.
14 Patch from Alain Williams
20 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
22 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
24 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
26 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
28 NM/04 Bugzilla 915: Flag broken perl installation during build.
34 TK/01 Added patch by Johannes Berg that expands the main option
35 "spamd_address" if it starts with a dollar sign.
37 TK/02 Write list of recipients to X-Envelope-Sender header when building
38 the mbox-format spool file for content scanning (suggested by Jakob
41 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
42 (http://www.dcc-servers.net/) support via dccifd. Activated by
43 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
45 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
46 by Mark Daniel Reidel <mr@df.eu>.
48 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
49 When building exim an external PCRE library is now needed -
50 PCRE is a system library on the majority of modern systems.
51 See entry on PCRE_LIBS in EDITME file.
53 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
54 conversation. Added nologin parameter to request.
55 Patch contributed by Kirill Miazine
57 TF/01 Do not log submission mode rewrites if they do not change the address.
59 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
61 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
62 log files in place. Contributed by Roberto Lima
64 NM/04 Bugzilla 667: close socket used by dovecot authenticator
66 TF/03 Bugzilla 615: When checking the local_parts router precondition
67 after a local_part_suffix or local_part_prefix option, Exim now
68 does not use the address's named list lookup cache, since this
69 contains cached lookups for the whole local part.
71 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
72 Robert Millan. Documentation is in experimental-spec.txt
74 TF/04 Bugzilla 668: Fix parallel build (make -j).
76 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
78 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
79 Patch provided by Jan Srzednicki
81 TF/05 Leading white space used to be stripped from $spam_report which
82 wrecked the formatting. Now it is preserved.
84 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
85 that they are available at delivery time.
87 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
89 TF/08 TLS error reporting now respects the incoming_interface and
90 incoming_port log selectors.
92 TF/09 Produce a more useful error message if an SMTP transport's hosts
93 setting expands to an empty string.
95 NM/06 Bugzilla 744: EXPN did not work under TLS.
96 Patch provided by Phil Pennock
98 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
99 Patch provided by Richard Godbee
101 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
102 acl_smtp_notquit, added index entry.
104 NM/09 Bugzilla 787: Potential buffer overflow in string_format
105 Patch provided by Eugene Bujak
107 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
108 Patch provided by Maxim Dounin
110 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
111 Patch provided by Phil Pennock
113 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
115 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
116 Patch provided by Brad "anomie" Jorsch
118 NM/14 Bugzilla 622: Added timeout setting to transport filter.
119 Patch provided by Dean Brooks
121 TK/05 Add native DKIM support (does not depend on external libraries).
123 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
124 Patch provided by Graeme Fowler
126 NM/16 Bugzilla 851: Documentation example syntax fix.
128 NM/17 Changed NOTICE file to remove references to embedded PCRE.
130 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
132 NM/19 Bugzilla 745: TLS version reporting
133 Patch provided by Phil Pennock
135 NM/20 Bugzilla 167: bool: condition support
136 Patch provided by Phil Pennock
138 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
139 Patch provided by Phil Pennock
141 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
142 Patch provided by Brad "anomie" Jorsch
144 NM/23 Bugzilla 687: Fix misparses in eximstats
145 Patch provided by Heiko Schlittermann
147 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
148 Patch provided by Heiko Schlittermann
150 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
151 plus update to original patch.
153 NM/26 Bugzilla 799: Documentation correction for ratelimit
155 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
156 Patch provided by David Brownlee
158 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
160 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
162 NM/30 Bugzilla 888: TLS documentation bugfixes
164 NM/31 Bugzilla 896: Dovecot buffer overrun fix
166 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
167 Unlike the original bugzilla I have changed all shell scripts in src tree
169 NM/33 Bugzilla 898: Transport filter timeout fix
170 Patch by Todd Rinaldo
172 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
173 Patch by Serge Demonchaux
175 NM/35 Bugzilla 39: Base64 decode bug fixes
176 Patch by Jakob Hirsch
178 NM/36 Bugzilla 909: Correct connect() call in dcc code
180 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
182 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
184 NM/39 Bugzilla 911: Fixed MakeLinks build script
190 TK/01 Add preliminary DKIM support. Currently requires a forked version of
191 ALT-N's libdkim that I have put here:
192 http://duncanthrax.net/exim-experimental/
194 Note to Michael Haardt: I had to rename some vars in sieve.c. They
195 were called 'true' and it seems that C99 defines that as a reserved
196 keyword to be used with 'bool' variable types. That means you could
197 not include C99-style headers which use bools without triggering
198 build errors in sieve.c.
200 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
201 as mailq or other aliases. Changed the --help handling significantly
202 to do whats expected. exim_usage() emits usage/help information.
204 SC/01 Added the -bylocaldomain option to eximstats.
206 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
208 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
210 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
216 PH/01 Another patch from the Sieve maintainer.
218 PH/02 When an IPv6 address is converted to a string for single-key lookup
219 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
220 dots are used instead of colons so that keys in lsearch files need not
221 contain colons. This was done some time before quoting was made available
222 in lsearch files. However, iplsearch files do require colons in IPv6 keys
223 (notated using the quote facility) so as to distinguish them from IPv4
224 keys. This meant that lookups for IP addresses in host lists did not work
225 for iplsearch lookups.
227 This has been fixed by arranging for IPv6 addresses to be expressed with
228 colons if the lookup type is iplsearch. This is not incompatible, because
229 previously such lookups could never work.
231 The situation is now rather anomolous, since one *can* have colons in
232 ordinary lsearch keys. However, making the change in all cases is
233 incompatible and would probably break a number of configurations.
235 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
238 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
239 conversion specification without a maximum field width, thereby enabling
240 a rogue spamd server to cause a buffer overflow. While nobody in their
241 right mind would setup Exim to query an untrusted spamd server, an
242 attacker that gains access to a server running spamd could potentially
243 exploit this vulnerability to run arbitrary code as the Exim user.
245 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
246 $primary_hostname instead of what libspf2 thinks the hosts name is.
248 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
249 a directory entry by the name of the lookup key. Previously, if a
250 symlink pointed to a non-existing file or a file in a directory that
251 Exim lacked permissions to read, a lookup for a key matching that
252 symlink would fail. Now it is enough that a matching directory entry
253 exists, symlink or not. (Bugzilla 503.)
255 PH/03 The body_linecount and body_zerocount variables are now exported in the
258 PH/04 Added the $dnslist_matched variable.
260 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
261 This means they are set thereafter only if the connection becomes
264 PH/06 Added the client_condition to authenticators so that some can be skipped
265 by clients under certain conditions.
267 PH/07 The error message for a badly-placed control=no_multiline_responses left
268 "_responses" off the end of the name.
270 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
272 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
273 (without spaces) instead of just copying the configuration text.
275 PH/10 Added the /noupdate option to the ratelimit ACL condition.
277 PH/11 Added $max_received_linelength.
279 PH/12 Added +ignore_defer and +include_defer to host lists.
281 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
282 way in which PCRE > 7.0 is built.
284 PH/14 Implemented queue_only_load_latch.
286 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
287 MAIL command. The effect was to mangle the value on 64-bit systems.
289 PH/16 Another patch from the Sieve maintainer.
291 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
293 PH/18 If a system quota error occurred while trying to create the file for
294 a maildir delivery, the message "Mailbox is full" was not appended to the
295 bounce if the delivery eventually timed out. Change 4.67/27 below applied
296 only to a quota excession during the actual writing of the file.
298 PH/19 It seems that peer DN values may contain newlines (and other non-printing
299 characters?) which causes problems in log lines. The DN values are now
300 passed through string_printing() before being added to log lines.
302 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
303 and InterBase are left for another time.)
305 PH/21 Added message_body_newlines option.
307 PH/22 Guard against possible overflow in moan_check_errorcopy().
309 PH/23 POSIX allows open() to be a macro; guard against that.
311 PH/24 If the recipient of an error message contained an @ in the local part
312 (suitably quoted, of course), incorrect values were put in $domain and
313 $local_part during the evaluation of errors_copy.
319 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
320 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
323 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
324 issue a MAIL command.
326 PH/02 In an ACL statement such as
328 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
330 if a client was not listed at all, or was listed with a value other than
331 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
332 the condition was not true (as it should be), so access was not denied.
333 The bug was that the ! inversion was incorrectly passed on to the second
334 item. This has been fixed.
336 PH/03 Added additional dnslists conditions == and =& which are different from
337 = and & when the dns lookup returns more than one IP address.
339 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
340 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
342 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
343 FSYNC, which compiles an option called disable_fsync that allows for
344 bypassing fsync(). The documentation is heavily laced with warnings.
346 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
348 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
349 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
350 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
351 including adding "make clean"; (3) Added -fPIC when compiling the test
352 dynamically loaded module, to get rid of a warning.
354 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
355 message fails, move_frozen_messages = true and ignore_bounce_errors_after
356 = 0s. The bug is otherwise harmless.
358 PH/07 There was a bug in the dovecot authenticator such that the value of
359 $auth1 could be overwritten, and so not correctly preserved, after a
360 successful authentication. This usually meant that the value preserved by
361 the server_setid option was incorrect.
363 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
365 PH/09 Installed PCRE release 7.0.
367 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
368 run for batched SMTP input. It is now run at the start of every message
369 in the batch. While fixing this I discovered that the process information
370 (output by running exiwhat) was not always getting set for -bs and -bS
371 input. This is fixed, and it now also says "batched" for BSMTP.
373 PH/11 Added control=no_pipelining.
375 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
376 patch, slightly modified), and move the expansion of helo_data till after
377 the connection is made in the smtp transport (so it can use these
380 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
382 PH/14 Added log_selector = +pid.
384 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
386 PH/16 Add ${if forany and ${if forall.
388 PH/17 Added dsn_from option to vary the From: line in DSNs.
390 PH/18 Flush SMTP output before performing a callout, unless control =
391 no_callout_flush is set.
393 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
394 was true (the default) a successful delivery failed to delete the retry
395 item, thus causing premature timeout of the address. The bug is now
398 PH/20 Added hosts_avoid_pipelining to the smtp transport.
400 PH/21 Long custom messages for fakedefer and fakereject are now split up
401 into multiline reponses in the same way that messages for "deny" and
402 other ACL rejections are.
404 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
405 with slight modification.
407 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
408 draft, changing the syntax and factoring some duplicate code".
410 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
411 for deliveries of the second and subsequent messages over the same SMTP
414 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
415 ${reduce, with only minor "tidies".
417 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
419 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
420 expansion side effects.
422 PH/27 When a message times out after an over-quota error from an Exim-imposed
423 quota, the bounce message says "mailbox is full". This message was not
424 being given when it was a system quota that was exceeded. It now should
427 MH/03 Made $recipients available in local_scan(). local_scan() already has
428 better access to the recipient list through recipients_list[], but
429 $recipients can be useful in postmaster-provided expansion strings.
431 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
432 in the case of a MAIL command with additional options following the
433 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
434 were accidentally chopped off.
436 PH/29 SMTP synchronization checks are implemented when a command is read -
437 there is a check that no more input is waiting when there shouldn't be
438 any. However, for some commands, a delay in an ACL can mean that it is
439 some time before the response is written. In this time, more input might
440 arrive, invalidly. So now there are extra checks after an ACL has run for
441 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
442 pipelining has not been advertised.
444 PH/30 MH's patch to allow iscntrl() characters to be list separators.
446 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
447 returned in the SMTP response when smtp_return_error_details was false.
450 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
451 instead of the C I/O that was originally supplied, because problems were
454 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
455 Exim which did not show up earlier: it was assuming that a call to
456 SSL_CTX_set_info_callback() might give an error value. In fact, there is
457 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
458 was a macro that became an assignment, so it seemed to work. This has
459 changed to a proper function call with a void return, hence the compile
460 error. Exim's code has been fixed.
462 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
465 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
467 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
469 PH/37 If a message is not accepted after it has had an id assigned (e.g.
470 because it turns out to be too big or there is a timeout) there is no
471 "Completed" line in the log. When some messages of this type were
472 selected by exigrep, they were listed as "not completed". Others were
473 picked up by some special patterns. I have improved the selection
474 criteria to be more general.
476 PH/38 The host_find_failed option in the manualroute router can now be set
477 to "ignore", to completely ignore a host whose IP address cannot be
478 found. If all hosts are ignored, the behaviour is controlled by the new
479 host_all_ignored option.
481 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
482 homing or because of multiple MX records with /mx) generated more than
483 one IP address, and the following item turned out to be the local host,
484 all the secondary addresses of the first item were incorrectly removed
485 from the list, along with the local host and any following hosts (which
486 is what is supposed to happen).
488 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
489 whoever called Exim into the -H file. In the case of the daemon it was
490 behaving confusingly. When first started, it used values for whoever
491 started the daemon, but after a SIGHUP it used the Exim user (because it
492 calls itself on a restart). I have changed the code so that it now always
495 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
496 message are rejected with the same error (e.g. no authentication or bad
497 sender address), and a DATA command is nevertheless sent (as can happen
498 with PIPELINING or a stupid MUA), the error message that was given to the
499 RCPT commands is included in the rejection of the DATA command. This is
500 intended to be helpful for MUAs that show only the final error to their
503 PH/42 Another patch from the Sieve maintainer.
505 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
506 Eximstats - Fixed some broken HTML links and added missing column headers
508 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
509 columns for Rejects, Temp Rejects, Ham, and Spam rows.
511 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
513 PH/43 Yet another patch from the Sieve maintainer.
515 PH/44 I found a way to check for a TCP/IP connection going away before sending
516 the response to the final '.' that terminates a message, but only in the
517 case where the client has not sent further data following the '.'
518 (unfortunately, this is allowed). However, in many cases there won't be
519 any further data because there won't be any more messages to send. A call
520 to select() can be used: if it shows that the input is "ready", there is
521 either input waiting, or the socket has been closed. An attempt to read
522 the next input character can distinguish the two cases. Previously, Exim
523 would have sent an OK response which the client would never have see.
524 This could lead to message repetition. This fix should cure that, at
525 least in a lot of common cases.
527 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
528 advertised in response to EHLO.
534 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
535 fixed by 4.65/MH/01 (is this a record?) are fixed:
537 (i) An empty string was always treated as zero by the numeric comparison
538 operators. This behaviour has been restored.
540 (ii) It is documented that the numeric comparison operators always treat
541 their arguments as decimal numbers. This was broken in that numbers
542 starting with 0 were being interpreted as octal.
544 While fixing these problems I realized that there was another issue that
545 hadn't been noticed. Values of message_size_limit (both the global option
546 and the transport option) were treated as octal if they started with 0.
547 The documentation was vague. These values are now always treated as
548 decimal, and I will make that clear in the documentation.
554 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
555 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
558 MH/01 Don't check that the operands of numeric comparison operators are
559 integers when their expansion is in "skipping" mode (fixes bug
560 introduced by 4.64-PH/07).
562 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
563 child addresses, Exim now panics and dies. Previously, because the count
564 is held in a short int, deliveries were likely to be lost. As such a
565 large number of recipients for a single message is ridiculous
566 (performance will be very, very poor), I have chosen to impose a limit
567 rather than extend the field.
573 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
574 leftover -K file (the existence of which was triggered by #402).
575 While we were at it, introduced process PID as part of the -K
576 filename. This should rule out race conditions when creating
579 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
580 processing considerably. Previous code took too long for large mails,
581 triggering a timeout which in turn triggers #401.
583 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
584 in the DK code in transports.c. sendfile() is not really portable,
585 hence the _LINUX specificness.
587 TF/01 In the add_headers option to the mail command in an Exim filter,
588 there was a bug that Exim would claim a syntax error in any
589 header after the first one which had an odd number of characters
592 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
593 callout verification, Exim cached a "reject" for the entire domain. This
594 is correct for most verifications, but it is not correct for a recipient
595 verification with use_sender or use_postmaster set, because in that case
596 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
597 case of MAIL FROM:<> rejection from other early rejections (e.g.
598 rejection of HELO). When verifying a recipient using a non-null MAIL
599 address, the cache is ignored if it shows MAIL FROM:<> rejection.
600 Whatever the result of the callout, the value of the domain cache is
601 left unchanged (for any other kind of callout, getting as far as trying
602 RCPT means that the domain itself is ok).
604 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
607 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
608 manifest itself as EPIPE rather than ECONNECT. When tidying away a
609 session, the daemon ignores ECONNECT errors and logs others; it now
610 ignores EPIPE as well.
612 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
613 (quoted-printable decoding).
615 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
616 later the small subsequent patch to fix an introduced bug.
618 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
620 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
622 PH/08 An error is now given if message_size_limit is specified negative.
624 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
625 to be given (somewhat) arbitrary names.
627 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
630 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
631 miscellaneous code fixes
633 PH/10 Added the log_reject_target ACL modifier to specify where to log
636 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
637 hostname. This is wrong, because it relates to the incoming message (and
638 probably the interface on which it is arriving) and not to the outgoing
639 callout (which could be using a different interface). This has been
640 changed to use the value of the helo_data option from the smtp transport
641 instead - this is what is used when a message is actually being sent. If
642 there is no remote transport (possible with a router that sets up host
643 addresses), $smtp_active_hostname is used.
645 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
646 tweaks were necessary in order to get it to work (see also 21 below):
647 (a) The code assumed that strncpy() returns a negative number on buffer
648 overflow, which isn't the case. Replaced with Exim's string_format()
650 (b) There were several signed/unsigned issues. I just did the minimum
651 hacking in of casts. There is scope for a larger refactoring.
652 (c) The code used strcasecmp() which is not a standard C function.
653 Replaced with Exim's strcmpic() function.
654 (d) The code set only $1; it now sets $auth1 as well.
655 (e) A simple test gave the error "authentication client didn't specify
656 service in request". It would seem that Dovecot has changed its
657 interface. Fortunately there's a specification; I followed it and
658 changed what the client sends and it appears to be working now.
660 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
663 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
664 address A is aliased to B and C, where B exists and C does not. Without
665 -v the output is "A verified" because verification stops after a
666 successful redirection if more than one address is generated. However,
667 with -v the child addresses are also verified. Exim was outputting "A
668 failed to verify" and then showing the successful verification for C,
669 with its parentage. It now outputs "B failed to verify", showing B's
670 parentage before showing the successful verification of C.
672 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
673 look up a TXT record in a specific list after matching in a combined
676 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
677 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
678 they consult the DNS. I had assumed they would set it the way they
679 wanted; and indeed my experiments on Linux seem to show that in some
680 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
681 To be on the safe side, however, I have now made the interface to
682 host_find_byname() similar to host_find_bydns(), with an argument
683 containing the DNS resolver options. The host_find_byname() function now
684 sets these options at its start, just as host_find_bydns() does. The smtp
685 transport options dns_qualify_single and dns_search_parents are passed to
686 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
687 of host_find_byname() use the default settings of RES_DEFNAMES
688 (qualify_single) but not RES_DNSRCH (search_parents).
690 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
691 spool_read_header() do less string testing, by means of a preliminary
692 switch on the second character of optional "-foo" lines. (This is
693 overdue, caused by the large number of possibilities that now exist.
694 Originally there were few.) While I was there, I also converted the
695 str(n)cmp tests so they don't re-test the leading "-" and the first
696 character, in the hope this might squeeze out yet more improvement.
698 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
699 flag allowing group syntax was set by the header_syntax check but not
700 turned off, possible causing trouble later; (2) The flag was not being
701 set at all for the header_verify test, causing "group"-style headers to
702 be rejected. I have now set it in this case, and also caused header_
703 verify to ignore an empty address taken from a group. While doing this, I
704 came across some other cases where the code for allowing group syntax
705 while scanning a header line wasn't quite right (mostly, not resetting
706 the flag correctly in the right place). These bugs could have caused
707 trouble for malformed header lines. I hope it is now all correct.
709 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
710 with the "reply" argument non-NULL. The code, however (which originally
711 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
712 but it didn't always do it. This confused somebody who was copying the
713 code for some other use. I have removed all the tests.
715 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
716 feature that was used to support insecure browsers during the U.S. crypto
717 embargo. It requires special client support, and Exim is probably the
718 only MTA that supported it -- and would never use it because real RSA is
719 always available. This code has been removed, because it had the bad
720 effect of slowing Exim down by computing (never used) parameters for the
721 RSA_EXPORT functionality.
723 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
724 authenticator to fail if there's a tab character in the incoming data
725 (there should never be unless someone is messing about, as it's supposed
726 to be base64-encoded). Also added, on Timo's advice, the "secured" option
727 if the connection is using TLS or if the remote IP is the same as the
728 local IP, and the "valid-client-cert option" if a client certificate has
731 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
732 authenticators. This can be used for authorization after authentication
733 succeeds. (In the case of plaintext, it servers for both authentication
736 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
737 if any retry times were supplied.
739 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
740 connection, where there is no client IP address to check. In this
741 situation, the verify now always succeeds.
743 PH/25 Applied John Jetmore's -Mset patch.
745 PH/26 Added -bem to be like -Mset, but loading a message from a file.
747 PH/27 In a string expansion for a processed (not raw) header when multiple
748 headers of the same name were present, leading whitespace was being
749 removed from all of them, but trailing whitespace was being removed only
750 from the last one. Now trailing whitespace is removed from each header
751 before concatenation. Completely empty headers in a concatenation (as
754 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
755 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
757 PH/29 [Removed. This was a change that I later backed out, and forgot to
758 correct the ChangeLog entry (that I had efficiently created) before
759 committing the later change.]
761 PH/30 Exim was sometimes attempting to deliver messages that had suffered
762 address errors (4xx response to RCPT) over the same connection as other
763 messages routed to the same hosts. Such deliveries are always "forced",
764 so retry times are not inspected. This resulted in far too many retries
765 for the affected addresses. The effect occurred only when there were more
766 hosts than the hosts_max_try setting in the smtp transport when it had
767 the 4xx errors. Those hosts that it had tried were not added to the list
768 of hosts for which the message was waiting, so if all were tried, there
769 was no problem. Two fixes have been applied:
771 (i) If there are any address or message errors in an SMTP delivery, none
772 of the hosts (tried or untried) are now added to the list of hosts
773 for which the message is waiting, so the message should not be a
774 candidate for sending over the same connection that was used for a
775 successful delivery of some other message. This seems entirely
776 reasonable: after all the message is NOT "waiting for some host".
777 This is so "obvious" that I'm not sure why it wasn't done
778 previously. Hope I haven't missed anything, but it can't do any
779 harm, as the worst effect is to miss an optimization.
781 (ii) If, despite (i), such a delivery is accidentally attempted, the
782 routing retry time is respected, so at least it doesn't keep
783 hammering the server.
785 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
786 in ${readsocket because some servers need this prod.
788 PH/32 Added some extra debug output when updating a wait-xxx database.
790 PH/33 The hint "could be header name not terminated by colon", which has been
791 given for certain expansion errors for a long time, was not being given
792 for the ${if def:h_colon_omitted{... case.
794 PH/34 The spec says: "With one important exception, whenever a domain list is
795 being scanned, $domain contains the subject domain." There was at least
796 one case where this was not true.
798 PH/35 The error "getsockname() failed: connection reset by peer" was being
799 written to the panic log as well as the main log, but it isn't really
800 panic-worthy as it just means the connection died rather early on. I have
801 removed the panic log writing for the ECONNRESET error when getsockname()
804 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
805 runs only) independently of the message's sender address. This meant
806 that, if the 4xx error was in fact related to the sender, a different
807 message to the same recipient with a different sender could confuse
808 things. In particualar, this can happen when sending to a greylisting
809 server, but other circumstances could also provoke similar problems.
810 I have changed the default so that the retry time for these errors is now
811 based a combination of the sender and recipient addresses. This change
812 can be overridden by setting address_retry_include_sender=false in the
815 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
816 remote server are returned as part of bounce messages. This was not
817 happening for LMTP over a pipe (the lmtp transport), but now it is the
818 same for both kinds of LMTP.
820 PH/38 Despite being documented as not happening, Exim was rewriting addresses
821 in header lines that were in fact CNAMEs. This is no longer the case.
823 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
824 and queue runs started by the daemon processed all messages. This has
825 been fixed so that -R and -S can now usefully be given with -q<time>.
827 PH/40 Import PCRE release 6.7 (fixes some bugs).
829 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
831 PH/42 Give an error if -q is specified more than once.
833 PH/43 Renamed the variables $interface_address and $interface_port as
834 $received_ip_address and $received_port, to make it clear that these
835 values apply to message reception, and not to the outgoing interface when
836 a message is delivered. (The old names remain recognized, of course.)
838 PH/44 There was no timeout on the connect() call when using a Unix domain
839 socket in the ${readsocket expansion. There now is.
841 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
842 be meaningful with "accept".
844 SC/01 Eximstats V1.43
845 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
847 SC/02 Eximstats V1.44
848 Use a glob alias rather than an array ref in the generated
849 parser. This improves both readability and performance.
851 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
852 Collect SpamAssassin and rejection statistics.
853 Don't display local sender or destination tables unless
854 there is data to show.
855 Added average volumes into the top table text output.
857 SC/04 Eximstats V1.46
858 Collect data on the number of addresses (recipients)
859 as well as the number of messages.
861 SC/05 Eximstats V1.47
862 Added 'Message too big' to the list of mail rejection
863 reasons (thanks to Marco Gaiarin).
865 SC/06 Eximstats V1.48
866 Mainlog lines which have GMT offsets and are too short to
867 have a flag are now skipped.
869 SC/07 Eximstats V1.49 (Alain Williams)
870 Added the -emptyok flag.
872 SC/08 Eximstats V1.50
873 Fixes for obtaining the IP address from reject messages.
875 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
876 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
877 whitesspace changes from 4.64-PH/27
879 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
882 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
883 are found, allow negative numbers in numeric criteria)
885 JJ/06 exipick.20061117.2, added new $message_body_missing variable
887 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
888 to match changes made in 4.64-PH/43
890 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
892 PH/47 Put in an explicit test for a DNS lookup of an address record where the
893 "domain" is actually an IP address, and force a failure. This locks out
894 those revolvers/nameservers that support "A-for-A" lookups, in
895 contravention of the specifications.
897 PH/48 When a host name was looked up from an IP address, and the subsequent
898 forward lookup of the name timed out, the host name was left in
899 $sender_host_name, contrary to the specification.
901 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
902 restricted to single-key lookups, Exim was not diagnosing an error if
903 * or *@ was used with a query-style lookup.
905 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
907 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
908 long ago, but noone interested enough thought of it. Let's just say that
909 the "1.1" means that there are some new functions that weren't there at
910 some point in the past.
912 PH/51 Error processing for expansion failure of helo_data from an smtp
913 transport during callout processing was broken.
915 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
916 tested/used via the -bh/-bhc/-bs options.
918 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
919 bug, fixed in subsequent PCRE releases).
921 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
922 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
924 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
930 SC/01 Use a glob alias rather than an array ref in eximstats generated
931 parser. This improves both readability and performance.
933 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
934 Don't display local sender or destination tables in eximstats unless
935 there is data to show.
936 Added average volumes into the eximstats top table text output.
938 SC/03 Collect data on the number of addresses (recipients) as well
939 as the number of messages in eximstats.
941 TF/01 Correct an error in the documentation for the redirect router. Exim
942 does (usually) call initgroups() when daemonizing.
944 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
945 with consistent privilege compared to when running as a daemon.
947 TF/03 Note in the spec that $authenticated_id is not set for local
948 submissions from trusted users.
950 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
951 Thanks to Dean Brooks <dean@iglou.com> for the patch.
953 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
954 by adding some example configuration directives to the default
955 configuration file. A little bit of work is required to uncomment the
956 directives and define how usernames and passwords are checked, but
957 there is now a framework to start from.
959 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
960 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
961 without this. I don't know how relevant this is to other LDAP libraries.
963 PH/02 Add the verb name to the "unknown ACL verb" error.
965 PH/03 Magnus Holmgren's patch for filter_prepend_home.
967 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
969 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
970 directory not expanded when it should be if an expanded home directory
971 was set for the address (which is overridden by the transport).
973 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
976 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
977 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
978 because it is too late at that time, and has no effect.
980 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
981 security issue with \' (bugzilla #107). I could not use the
982 PQescapeStringConn() function, because it needs a PGconn value as one of
985 PH/08 When testing addresses using -bt, indicate those final addresses that
986 are duplicates that would not cause an additional delivery. At least one
987 person was confused, thinking that -bt output corresponded to deliveries.
988 (Suppressing duplicates isn't a good idea as you lose the information
989 about possibly different redirections that led to the duplicates.)
991 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
992 systems where poll() doesn't work, in particular OS X.
994 PH/10 Added more information to debugging output for retry time not reached.
996 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
997 operations in malware.c.
999 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1002 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1003 syslog_duplication set false, log lines that would normally be written
1004 both the the main log and to the reject log were not written to syslog at
1007 PH/14 In the default configuration, change the use of "message" in ACL warn
1008 statements to "add_header".
1010 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1011 not followed by a command (e.g. "seen endif").
1013 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1014 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1017 PH/17 Added extra conditions to the default value of delay_warning_condition
1021 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1022 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1023 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1026 The Auto-Submitted: and various List- headers are standardised, whereas I
1027 don't think Precedence: ever was.
1029 PH/18 Refactored debugging code in route_finduser() to show more information,
1030 in particular, the error code if getpwnam() issues one.
1032 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1033 This is apparently needed in addition to the PH/07 change above to avoid
1034 any possible encoding problems.
1036 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1037 but not after initializing Perl.
1039 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1040 output them only if debugging. By default they are written stderr,
1041 apparently, which is not desirable.
1043 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1046 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1049 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1051 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1052 authenticated or an ident call has been made. Suppress the default
1053 values for $authenticated_id and $authenticated_sender (but permit -oMai
1054 and -oMas) when testing with -bh.
1056 PH/24 Re-jigged the order of the tests in the default configuration so that the
1057 tests for valid domains and recipients precede the DNS black list and CSA
1058 tests, on the grounds that those ones are more expensive.
1060 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1061 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1062 This bug exists in every version of Exim that I still have, right back to
1065 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1066 However, an attempt to turn on case-sensitivity in a regex key by
1067 including (?-i) didn't work because the subject string was already
1068 lowercased, and the effects were non-intuitive. It turns out that a
1069 one-line patch can be used to allow (?-i) to work as expected.
1075 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1076 other effects) broke the use of negated acl sub-conditions.
1078 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1081 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1082 "Deny" causes Exim to reject the incoming connection with a 554 error.
1083 Unfortunately, if there is a major crisis, such as a disk failure,
1084 tcp-wrappers gives "deny", whereas what one would like would be some
1085 kind of temporary error. A kludge has been added to help with this.
1086 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1087 554 error is used if errno is still zero or contains ENOENT (which occurs
1088 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1091 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1093 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1094 errors. Otherwise a message that provokes a temporary error (when other
1095 messages do not) can cause a whole host to time out.
1097 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1098 addresses were routed directly to files or pipes from a redirect router.
1099 File deliveries just didn't batch; pipe deliveries might have suffered
1102 PH/06 A failure to get a lock for a hints database would erroneously always say
1103 "Failed to get write lock", even when it was really a read lock.
1105 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1106 of 0600. This has been changed to use the value of the lockfile_mode
1107 option (which defaults to 0600).
1109 PH/08 Applied small patch from the Sieve maintainer.
1111 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1112 folder from quota calculations, a direct delivery into this folder messed
1113 up the contents of the maildirsize file. This was because the regex was
1114 used only to exclude .Trash (or whatever) when the size of the mailbox
1115 was calculated. There was no check that a delivery was happening into an
1116 excluded directory. This bug has been fixed by ignoring all quota
1117 processing for deliveries into excluded directories.
1119 PH/10 Added the maildirfolder_create_regex option to appendfile.
1125 PH/01 The code for finding all the local interface addresses on a FreeBSD
1126 system running IPv6 was broken. This may well have applied to all BSD
1127 systems, as well as to others that have similar system calls. The broken
1128 code found IPv4 interfaces correctly, but gave incorrect values for the
1129 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1130 that it would not match correctly against @[] and not recognize the IPv6
1133 PH/02 The ipliteral router was not recognizing addresses of the form user@
1134 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1136 PH/03 Added disable_ipv6.
1138 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1139 decoded form, because it is most often used to construct To: headers
1140 lines in autoreplies, and the decoded form may well be syntactically
1141 invalid. However, $reply_address has leading white space removed, and all
1142 newlines turned into spaces so that the autoreply transport does not
1145 PH/05 If group was specified without a user on a router, and no group or user
1146 was specified on a transport, the group from the router was ignored.
1148 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1149 for visible compile-time settings that can be used to change these
1150 numbers, for those that want even more. Backwards compatibility with old
1151 spool files has been maintained. However, going back to a previous Exim
1152 release will lost any variables that are in spool files.
1154 PH/07 Two small changes when running in the test harness: increase delay when
1155 passing a TCP/IP connection to a new process, in case the original
1156 process has to generate a bounce, and remove special handling of
1157 127.0.0.2 (sic), which is no longer necessary.
1159 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1160 be the same on different OS.
1162 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1165 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1166 whether --show-vars was specified or not
1168 JJ/02 exipick: Added support for new ACL variable spool format introduced
1171 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1172 syntactically invalid From: or Reply-to: line, and a filter used this to
1173 generate an autoreply, and therefore failed to obtain an address for the
1174 autoreply, Exim could try to deliver to a non-existent relative file
1175 name, causing unrelated and misleading errors. What now happens is that
1176 it logs this as a hard delivery error, but does not attempt to create a
1179 PH/11 The exinext utility has a -C option for testing purposes, but although
1180 the given file was scanned by exinext itself; it wasn't being passed on
1181 when Exim was called.
1183 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1184 an end-of-file indication when reading a command response.
1186 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1187 compiled. In many other places in Exim, IPv6 addresses are always
1188 recognized, so I have changed this. It also means that IPv4 domain
1189 literals of the form [IPV4:n.n.n.n] are now always recognized.
1191 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1192 used if the router is not running as root, for example, when verifying at
1193 ACL time, or when using -bh. The debugging output from this situation was
1194 non-existent - all you got was a failure to exec. I have made two
1197 (a) Failures to set uid/gid, the current directory, or a process leader
1198 in a subprocess such as that created by queryprogram now generate
1199 suitable debugging ouput when -d is set.
1201 (b) The queryprogram router detects when it is not running as root,
1202 outputs suitable debugging information if -d is set, and then runs
1203 the subprocess without attempting to change uid/gid.
1205 PH/15 Minor change to Makefile for building test_host (undocumented testing
1208 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1209 additional section of a DNS packet that returns MX or SRV records.
1210 Instead, it always explicitly searches for A/AAAA records. This avoids
1211 major problems that occur when a DNS server includes only records of one
1212 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1213 fixed another bug: if SRV records were looked up and the corresponding
1214 address records were *not* found in the additional section, the port
1215 values from the SRV records were lost.
1217 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1218 using the correct key (the original address) when searching the retry
1219 rules in order to find which one to use for generating the retry hint.
1221 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1222 adding the default one. Similarly, if it contains a Reply-To: header, the
1223 errors_reply_to option, if set, is not used.
1225 PH/19 When calculating a retry time, Exim used to measure the "time since
1226 failure" by looking at the "first failed" field in the retry record. Now
1227 it does not use this if it is later than than the arrival time of the
1228 message. Instead it uses the arrival time. This makes for better
1229 behaviour in cases where some deliveries succeed, thus re-setting the
1230 "first failed" field. An example is a quota failure for a huge message
1231 when small messages continue to be delivered. Without this change, the
1232 "time since failure" will always be short, possible causing more frequent
1233 delivery attempts for the huge message than are intended.
1234 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1236 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1237 $1, $2, $3) because the numerical variables can be reset during some
1238 expansion items (e.g. "match"), thereby losing the authentication data.
1240 PH/21 Make -bV show the size of off_t variables so that the test suite can
1241 decide whether to run tests for quotas > 2G.
1243 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1244 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1245 filecount value is greater than 2G or if a quota value is greater than 2G
1246 on a system where the size of off_t is not greater than 4, a panic error
1249 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1250 never match. The debug and -bh output now contains an explicit error
1251 message indicating a malformed IPv4 address or mask.
1253 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1254 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1255 PH/23 above applies.
1257 PH/25 Do not write to syslog when running in the test harness. The only
1258 occasion when this arises is a failure to open the main or panic logs
1259 (for which there is an explicit test).
1261 PH/26 Added the /no_tell option to "control=freeze".
1263 PH/27 If a host name lookup failed very early in a connection, for example, if
1264 the IP address matched host_lookup and the reverse lookup yielded a name
1265 that did not have a forward lookup, an error message of the form "no IP
1266 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1267 could be logged. Now it outputs the IP address instead of "NULL".
1269 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1270 allows the sender and the authenticated sender to be set when
1271 submitting a message from within Exim. Since child_open_exim() is
1272 documented for local_scan(), the new function should be too.
1274 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1275 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1276 results in an empty string is now treated as unset.
1278 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1280 PH/31 Added sender_verify_fail logging option.
1282 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1283 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1284 tidied the source and removed it altogether.
1286 PH/33 When a queue run was abandoned because the load average was too high, a
1287 log line was always written; now it is written only if the queue_run log
1288 selector is set. In addition, the log line for abandonment now contains
1289 information about the queue run such as the pid. This is always present
1290 in "start" and "stop" lines but was omitted from the "abandon" line.
1292 PH/34 Omit spaces between a header name and the colon in the error message that
1293 is given when verify = headers_syntax fails (if there are lots of them,
1294 the message gets confusing).
1296 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1297 names, as there are now some PTR records that contain slashes. This check
1298 is only to protect against broken name servers that fall over on strange
1299 characters, so the fact that it applies to all lookups doesn't matter.
1301 PH/36 Now that the new test suite is complete, we can remove some of the
1302 special code in Exim that was needed for the old test suite. For example,
1303 sorting DNS records because real resolvers return them in an arbitrary
1304 order. The new test suite's fake resolver always returns records in the
1307 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1308 bounces) except when queue_only is set, to avoid logging races between
1309 the different processes.
1311 PH/38 Panic-die if .include specifies a non-absolute path.
1313 PH/39 A tweak to the "H" retry rule from its user.
1315 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1316 a label. They prevented compilation on older perls.
1318 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1319 a warning to be raised on newish perls.
1321 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1322 on queue. Changes to match documented behaviour of showing count of
1323 messages matching specified criteria.
1325 PH/40 Changed the default ident timeout from 30s to 5s.
1327 PH/41 Added support for the use of login_cap features, on those BSD systems
1328 that have them, for controlling the resources used by pipe deliveries.
1330 PH/42 The content-scanning code uses fopen() to create files in which to put
1331 message data. Previously it was not paying any attention to the mode of
1332 the files. Exim runs with umask(0) because the rest of the code creates
1333 files with open(), and sets the required mode explicitly. Thus, these
1334 files were ending up world-writeable. This was not a big issue, because,
1335 being within the spool directory, they were not world-accessible. I have
1336 created a function called modefopen, which takes an additional mode
1337 argument. It sets umask(777), creates the file, chmods it to the required
1338 mode, then resets the umask. All the relevant calls to fopen() in the
1339 content scanning code have been changed to use this function.
1341 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1342 to 24 hours. This avoids potential overflow problems when processing G
1343 and H retry rules. I suspect nobody ever tinkers with this value.
1345 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1347 PH/45 When the plaintext authenticator is running as a client, the server's
1348 challenges are checked to ensure they are valid base64 strings. By
1349 default, the authentication attempt is cancelled if an invalid string is
1350 received. Setting client_ignore_invalid_base64 true ignores these errors.
1351 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1352 they are received. Thus, the responses can be made to depend on the
1353 challenges. If an invalid string is ignored, an empty string is placed in
1356 PH/46 Messages that are created by the autoreply transport now contains a
1357 References: header, in accordance with RFCs 2822 and 3834.
1359 PH/47 Added authenticated_sender_force to the smtp transport.
1361 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1363 PH/49 Installed latest patch from the Sieve maintainer.
1365 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1366 was also set, the appendfile transport was unnecessarily scanning a
1367 directory of message files (e.g. for maildir delivery) to find the count
1368 of files (along with the size), even though it did not need this
1369 information. It now does the scan only if it needs to find either the
1370 size of the count of files.
1372 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1374 PH/52 Two bugs concerned with error handling when the smtp transport is
1377 (i) Exim was not creating retry information for temporary errors given
1378 for individual recipients after the DATA command when the smtp transport
1379 was used in LMTP mode. This meant that they could be retried too
1380 frequently, and not timed out correctly.
1382 (ii) Exim was setting the flag that allows error details to be returned
1383 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1384 recipients that were returned after the DATA command.
1386 PH/53 This is related to PH/52, but is more general: for any failing address,
1387 when detailed error information was permitted to be returned to the
1388 sender, but the error was temporary, then after the final timeout, only
1389 "retry timeout exceeded" was returned. Now it returns the full error as
1390 well as "retry timeout exceeded".
1392 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1393 do this, and (what is worse) MTAs that accept it.
1395 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1396 will now be deprecated.
1398 PH/56 New os.c-cygwin from the Cygwin maintainer.
1400 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1401 formats (previously only available in exim formats via -bpr, -bpru,
1402 and -bpra. Now also available in native and exiqgrep formats)
1404 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1405 with very large, slow to parse queues
1407 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1409 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1411 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1412 responses to authentication challenges, though it was showing the
1413 challenges; (ii) I've removed the CR characters from the debug output for
1416 PH/58 Allow for the insertion of a newline as well as a space when a string
1417 is turned into more than one encoded-word during RFC 2047 encoding. The
1418 Sieve code now uses this.
1420 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1421 data_4xx, lost_connection, tls_required.
1423 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1424 message was being sent as an SMTP response.
1426 PH/61 Add -l and -k options to exicyclog.
1428 PH/62 When verifying, if an address was redirected to one new address, so that
1429 verification continued, and the new address failed or deferred after
1430 having set something in $address_data, the value of $address_data was not
1431 passed back to the ACL. This was different to the case when no
1432 redirection occurred. The value is now passed back in both cases.
1434 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1435 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1436 use login_cap.h, so on its own it isn't the distinguishing feature. The
1437 new name refers directly to the setclassresources() function.
1439 PH/65 Added configuration files for NetBSD3.
1441 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1443 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1444 is preferred over IPv4.
1446 PH/68 The bounce_return_message and bounce_return_body options were not being
1447 honoured for bounces generated during the reception of non-SMTP messages.
1448 In particular, this applied to messages rejected by the ACL. This bug has
1449 been fixed. However, if bounce_return_message is true and bounce_return_
1450 body is false, the headers that are returned for a non-SMTP message
1451 include only those that have been read before the error was detected.
1452 (In the case of an ACL rejection, they have all been read.)
1454 PH/69 The HTML version of the specification is now built in a directory called
1455 spec_html instead of spec.html, because the latter looks like a path with
1456 a MIME-type, and this confuses some software.
1458 PH/70 Catch two compiler warnings in sieve.c.
1460 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1461 function verify_get_ident() calls ip_connect() to connect a socket, but
1462 if the "connect()" function timed out, ip_connect() used to close the
1463 socket. However, verify_get_ident() also closes the socket later, and in
1464 between Exim writes to the log, which may get opened at this point. When
1465 the socket was closed in ip_connect(), the log could get the same file
1466 descriptor number as the socket. This naturally causes chaos. The fix is
1467 not to close the socket in ip_connect(); the socket should be closed by
1468 the function that creates it. There was only one place in the code where
1469 this was missing, in the iplookup router, which I don't think anybody now
1470 uses, but I've fixed it anyway.
1472 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1473 well as to direct DNS lookups. Otherwise the handling of names in host
1474 lists is inconsistent and therefore confusing.
1480 PH/01 Two changes to the default runtime configuration:
1482 (1) Move the checks for relay_from_hosts and authenticated clients from
1483 after to before the (commented out) DNS black list checks.
1485 (2) Add control=submission to the relay_from_hosts and authenticated
1486 clients checks, on the grounds that messages accepted by these
1487 statements are most likely to be submissions.
1489 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1491 (1) Generate an error if the third argument for the ${prvs expansion is
1494 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1497 (3) Reset the variables that are obtained from the first argument of
1498 ${prvscheck and used in the second argument before leaving the code,
1499 because their memory is reclaimed, so using them afterwards may do
1502 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1503 one (it's much easier than Tom thought :-).
1505 (5) Because of (4), we can now allow for the use of $prvscheck_result
1506 inside the third argument.
1508 PH/03 For some reason, the default setting of PATH when running a command from
1509 a pipe transport was just "/usr/bin". I have changed it to
1512 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1513 anything to be listed in the output from -bV.
1515 PH/05 When a filter generated an autoreply, the entire To: header line was
1516 quoted in the delivery log line, like this:
1518 => >A.N.Other <ano@some.domain> <original@ddress> ...
1520 This has been changed so that it extracts the operative address. There
1521 may be more than one such address. If so, they are comma-separated, like
1524 => >ano@some.domain,ona@other.domain <original@ddress> ...
1526 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1527 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1528 not being looked up in the rDNS to get a host name, Exim was showing the
1529 IP address twice in Received: lines, even though the IP addresses were
1530 identical. For example:
1532 Received: from [1.2.3.4] (helo=[1.2.3.4])
1534 However, if the real host name was known, it was omitting the HELO data
1535 if it matched the actual IP address. This has been tidied up so that it
1536 doesn't show the same IP address twice.
1538 PH/07 When both +timestamp and +memory debugging was on, the value given by
1539 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1540 called by the debug printing, thereby overwriting the timestamp buffer.
1541 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1543 PH/08 When the original message was included in an autoreply transport, it
1544 always said "this is a copy of the message, including all the headers",
1545 even if body_only or headers_only was set. It now gives an appropriate
1548 PH/09 Applied a patch from the Sieve maintainer which:
1550 o fixes some comments
1551 o adds the (disabled) notify extension core
1552 o adds some debug output for the result of if/elsif tests
1553 o points to the current vacation draft in the documentation
1554 and documents the missing references header update
1558 o fixes a bug in processing the envelope test (when testing
1559 multiple envelope elements, the last element determinted the
1562 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1563 Electronic Mail") by including:
1565 Auto-submitted: auto-generated
1567 in the messages that it generates (bounce messages and others, such as
1568 warnings). In the case of bounce messages for non-SMTP mesages, there was
1569 also a typo: it was using "Auto_submitted" (underscore instead of
1570 hyphen). Since every message generated by Exim is necessarily in response
1571 to another message, thes have all been changed to:
1573 Auto-Submitted: auto-replied
1575 in accordance with these statements in the RFC:
1577 The auto-replied keyword:
1579 - SHOULD be used on messages sent in direct response to another
1580 message by an automatic process,
1582 - MUST NOT be used on manually-generated messages,
1584 - MAY be used on Delivery Status Notifications (DSNs) and Message
1585 Disposition Notifications (MDNs),
1587 - MUST NOT be used on messages generated by automatic or periodic
1588 processes, except for messages which are automatic responses to
1591 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1592 to the default Received: header definition.
1594 PH/12 Added log selector acl_warn_skipped (default on).
1596 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1597 variables because (a) they are in the wrong storage pool and (b) even if
1598 they were copied, it wouldn't work properly because of the caching.
1600 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1601 checking when decoding. Apparently there are clients that generate
1602 overlong encoded strings. Why am I not surprised?
1604 PH/15 If the first argument of "${if match_address" was not empty, but did not
1605 contain an "@" character, Exim crashed. Now it writes a panic log message
1606 and treats the condition as false.
1608 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1610 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1611 extension "envelope-auth". The code is finished and in agreement with
1612 other implementations, but there is no documentation so far and in fact,
1613 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1614 not changing the active code.
1616 Print executed "if" and "elsif" statements when debugging is used. This
1617 helps a great deal to understand what a filter does.
1619 Document more things not specified clearly in RFC3028. I had all this
1620 sorted out, when out of a sudden new issues came to my mind. Oops."
1622 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1625 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1626 canonical form (as documented). However, after a host name lookup from
1627 the IP address, check_host() was doing a simple string comparison with
1628 addresses acquired from the DNS when checking that the found name did
1629 have the original IP as one of its addresses. Since any found IPv6
1630 addresses are likely to be in abbreviated form, the comparison could
1631 fail. Luckily, there already exists a function for doing the comparison
1632 by converting both addresses to binary, so now that is used instead of
1633 the text comparison.
1635 PH/20 There was another similar case to PH/19, when a complete host name was
1636 given in a host list; looking up its IP address could give an abbreviated
1637 form, whereas the current host's name might or might not be abbreviated.
1638 The same fix has been applied.
1644 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1645 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1648 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1649 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1651 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1653 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1654 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1655 Also, for "Auto-Submitted", treat anything other than "no" as
1656 non-personal, in accordance with RFC 3834. (Previously it treated
1657 anything starting "auto-" as non-personal.)
1659 TF/01 The control=submission/name=... option had a problem with syntax
1660 errors if the name included a slash character. The /name= option
1661 now slurps the rest of the string, so it can include any characters
1662 but it must come last in the list of options (after /sender_retain
1665 PH/05 Some modifications to the interface to the fake nameserver for the new
1673 TK/01 Added the "success_on_redirect" address verification option. See
1674 NewStuff for rationale and an example.
1676 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1678 PH/02 Patch to exigrep to allow it to work on syslog lines.
1680 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1681 fread() to skip over the body file's header line, because in Cygwin the
1682 header line is locked and is inaccessible.
1684 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1685 co-exist for some time) to make it clear that it is the Exim ID that is
1686 referenced, not the Message-ID: header line.
1688 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1689 string_format() function, because snprintf() does not exist on all
1692 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1693 ${stat: expansion item.
1695 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1696 protocol synchronization error", to keep the pedants happy.
1698 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1699 well as for IRIX systems, when gcc is being used. See the host.c source
1702 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1704 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1707 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1708 transport and to the smtp transport in LMTP mode.
1710 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1712 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1713 run a filter in a subprocess. This could lead to confusion in subsequent
1714 lookups in the parent process. There should also be a search_tidyup() at
1715 the end of the subprocess.
1717 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1718 only if the host matched helo_try_verify_hosts, which caused the
1719 verification to occur when the EHLO/HELO command was issued. The ACL just
1720 tested the remembered result. Now, if a previous verification attempt has
1721 not happened, "verify = helo" does it there and then.
1723 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1725 TK/03 Fix log output including CR from clamd.
1727 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1728 exist provoked a memory error which could cause a segfault.
1730 PH/15 Installed PCRE 6.2
1732 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1734 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1735 of the problem. Specifically, suggested +O2 rather than +O1 for the
1738 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1740 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1741 record, the port was not correctly logged when the outgoing_port log
1742 selector was set (it logged the transort's default port).
1744 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1745 fallback_hosts, and "hosts" in the smtp transport.
1747 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1748 host errors such as "Connection refused".
1750 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1751 authentication with radiusclient 0.4.9:
1753 - Error returned from rc_read_config was caught wrongly
1754 - Username/password not passed on to radius server due to wrong length.
1756 The presumption is that some radiusclient API changes for 4.51/PH/17
1757 were not taken care of correctly. The code is still untested by me (my
1758 Linux distribution still has 0.3.2 of radiusclient), but it was
1759 contributed by a Radius user.
1761 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1762 expanding the "port" option of the smtp transport.
1764 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1765 while reading a MIME header. Thanks to Tom Hughes for a patch.
1767 PH/24 Include config.h inside local_scan.h so that configuration settings are
1770 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1771 that in an ACL for RCPT (for example), you can examine exactly what was
1774 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1775 commands, but it was not correctly comparing the address with the actual
1776 client host address. Thus, it would show the EHLO address in Received:
1777 header lines when this was not necessary.
1779 PH/27 Added the % operator to ${eval:}.
1781 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1782 it should be ignoring failures (because with -C, for example, it has lost
1783 privilege). It wasn't ignoring creation failures other than "already
1786 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1789 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1790 because an input line was too long, either on its own, or by virtue of
1791 too many continuations, the temporary file was not being removed, and the
1792 return code was incorrect.
1794 PH/31 Missing "BOOL" in function definition in filtertest.c.
1796 PH/32 Applied Sieve patches from the maintainer.
1798 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1800 PH/33 Added "verify = not_blind".
1802 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1803 Local/Makefile (with some defaults set). These are used in built scripts
1804 such as exicyclog, but they have never been used in the exim_install
1805 script (though there are many overriding facilities there). I have
1806 arranged that the exim_install script now takes note of these two
1809 PH/35 Installed configuration files for Dragonfly.
1811 PH/36 When a locally submitted message by a trusted user did not contain a
1812 From: header, and the sender address was obtained from -f or from an SMTP
1813 MAIL command, and the trusted user did not use -F to supply a sender
1814 name, $originator_name was incorrectly used when constructing a From:
1815 header. Furthermore, $originator_name was used for submission mode
1816 messages from external hosts without From: headers in a similar way,
1817 which is clearly wrong.
1819 PH/37 Added control=suppress_local_fixups.
1821 PH/38 When log_selector = +received_sender was set, and the addition of the
1822 sender made the log line's construction buffer exactly full, or one byte
1823 less than full, an overflow happened when the terminating "\n" was
1826 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1827 when the result of a list match is failure because a DNS lookup failed.
1829 PH/40 RM_COMMAND is now used in the building process.
1831 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1832 the "build-* directories that it finds.
1834 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1835 address in a domain literal was a prefix of an interface address.
1837 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1838 when verifying a sender address, unless rewrite_headers is false.
1840 PH/44 Wrote a long comment about why errors_to addresses are verified as
1841 recipients, not senders.
1843 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1844 the ratelimit ACL was added.
1846 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1848 PH/46 Added extra information about PostgreSQL errors to the error string.
1850 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1851 avoiding the need to install special zones in a real server. This is
1852 backwards compatible; if it can't find the fake resolver, it drops back.
1853 Thus, both old and new test suites can be run.
1855 TF/02 Added util/ratelimit.pl
1857 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1858 clock is set back in time.
1860 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1861 Candler <B.Candler@pobox.com>.
1863 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1864 OK for addresses that are the result of redirections.
1866 PH/48 A number of further additions for the benefit of the new test suite,
1867 including a fake gethostbyname() that interfaces to the fake DNS resolver
1870 TF/06 The fix for widen_domains has also been applied to qualify_single and
1871 search_parents which are the other dnslookup options that can cause
1874 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1877 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1879 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1880 service" if it encountered an MX record with an empty target hostname.
1881 The message is now "an MX or SRV record indicated no SMTP service".
1883 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1884 if the DNS of the sending site is misconfigured. This is quite a
1885 common situation. This change restores the behaviour of treating a
1886 helo verification defer as a failure.
1888 PH/51 If self=fail was set on a router, the bounce message did not include the
1889 actual error message.
1895 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1897 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1898 command itself ended in error, the underlying message about the transport
1899 filter timeout was being overwritten with the pipe command error. Now the
1900 underlying error message should be appended to the second error message.
1902 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1904 PH/02 Reduce the amount of output that "make" produces by default. Full output
1905 can still be requested.
1907 PH/03 The warning log line about a condition test deferring for a "warn" verb
1908 was being output only once per connection, rather than after each
1909 occurrence (because it was using the same function as for successful
1910 "warn" verbs). This seems wrong, so I have changed it.
1912 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1913 it should not have, which might have caused a crash in the right
1914 circumstances, but probably never did.
1916 PH/04 Installed a modified version of Tony Finch's patch to make submission
1917 mode fix the return path as well as the Sender: header line, and to
1918 add a /name= option so that you can make the user's friendly name appear
1921 TF/03 Added the control = fakedefer ACL modifier.
1923 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1924 Mark Lowes for thorough testing.
1926 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1928 TK/03 Merged latest SRS patch from Miles Wilton.
1930 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1931 with the definition in sysexits.h (which is #included earlier).
1932 Fortunately, Exim does not actually use EX_OK. The code used to try to
1933 preserve the sysexits.h value, by assumimg that macro definitions were
1934 scanned for macro replacements. I have been disabused of this notion,
1935 so now the code just undefines EX_OK before #including unistd.h.
1937 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1938 in the smtp transport. When a block could not be written in a single
1939 write() function, the timeout was being re-applied to each part-write.
1940 This seems wrong - if the receiver was accepting one byte at a time it
1941 would take for ever. The timeout is now adjusted when this happens. It
1942 doesn't have to be particularly precise.
1944 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1945 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1947 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1948 without a domain if the check to <postmaster@domain> fails.
1950 SC/01 Eximstats: added -xls and the ability to specify output files
1951 (patch written by Frank Heydlauf).
1953 SC/02 Eximstats: use FileHandles for outputing results.
1955 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1957 SC/04 Eximstats: fixed display of large numbers with -nvr option
1959 SC/05 Eximstats: fixed merging of reports with empty tables.
1961 SC/06 Eximstats: added the -include_original_destination flag
1963 SC/07 Eximstats: removed tabs and trailing whitespace.
1965 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1967 TK/06 MBOX spool code: Add real "From " MBOX separator line
1968 so the .eml file is really in mbox format (even though
1969 most programs do not really care). Patch from Alex Miller.
1971 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1972 The latter is generated from $received_to and is only set if the
1973 message has one envelope recipient. SA can use these headers,
1974 obviously out-of-the-box. Patch from Alex Miller.
1976 PH/08 The ${def test on a variable was returning false if the variable's
1977 value was "0", contrary to what the specification has always said!
1978 The result should be true unless the variable is empty.
1980 PH/09 The syntax error of a character other than { following "${if
1981 def:variable_name" (after optional whitespace) was not being diagnosed.
1982 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1983 accidental colon was present, for example, could give incorrect results.
1985 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1986 result is used (not including appendfile, where other changes are about
1989 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1990 This involved changing a lot of size variables from int to off_t. It
1991 should work with maildirs and everything.
1993 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1994 spamd dying while we are connected to it.
1996 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1999 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2000 function for BDB 4.3.
2002 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2004 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2005 the sources for PCRE have been re-arranged and more files are now
2008 PH/15 The code I had for printing potentially long long variables in PH/11
2009 above was not the best (it lost precision). The length of off_t variables
2010 is now inspected at build time, and an appropriate printing format (%ld
2011 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2012 to be "long long int" or "long int". This is needed for the internal
2013 formatting function string_vformat().
2015 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2016 the configuration file to be ":syslog", then the script "guesses" where
2017 the logs files are, rather than using the compiled in default. In our
2018 case the guess is not the same as the compiled default, so the script
2019 suddenly stopped working when I started to use syslog. The patch checks
2020 to see if log_file_path is "". If so, it attempts to read it from exim
2021 with no configuration file to get the compiled in version, before it
2022 falls back to the previous guessing code."
2024 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2025 implementing BATV in an Exim configuration. See NewStuff for the gory
2028 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2029 Makefile that are specific to HP-UX.
2031 PH/18 If the "use_postmaster" option was set for a recipient callout together
2032 with the "random" option, the postmaster address was used as the MAIL
2033 FROM address for the random test, but not for the subsequent recipient
2034 test. It is now used for both.
2036 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2037 patch removes a few documentation additions to RFC 3028, because the
2038 latest draft now contains them. It adds the new en;ascii-case comparator
2039 and a new error check for 8bit text in MIME parts. Comparator and
2040 require names are now matched exactly. I enabled the subaddress
2041 extension, but it is not well tested yet (read: it works for me)."
2043 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2044 rework some of the code of TK/09 above to avoid the hardwired use of
2045 "%lld" and "long long". Replaced the call to snprintf() with a call to
2048 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2049 records point to non-existent hosts", "retry timeout exceeded", and
2050 "retry time not reached for any host after a long failure period".
2052 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2053 experimental DomainKeys support:
2055 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2056 (2) On an error such as an illegally used "control", the wrong name for
2057 the control was given.
2059 These problems did NOT occur unless DomainKeys support was compiled.
2061 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2063 PH/24 Added ${if match_ip condition.
2065 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2066 databases so that it will be absolutely obvious if a crash occurs in the
2067 DB library. This is a regular occurrence (often caused by mis-matched
2070 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2071 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2072 picked up on a user's system that detects such things. There doesn't seem
2073 to be a gcc warning option for this - only an attribute that has to be
2074 put on the function's prototype. It seems that in Fedora Core 4 they have
2075 set this on a number of new functions. No doubt there will be more in due
2078 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2079 specify a transport. However, if an address that was verified by such a
2080 router was the subject of a callout, Exim crashed because it tried to
2081 read the rcpt_include_affixes from the non-existent transport. Now it
2082 just assumes that the setting of that option is false. This bug was
2083 introduced by 4.51/PH/31.
2085 PH/28 Changed -d+all to exclude +memory, because that information is very
2086 rarely of interest, but it makes the output a lot bigger. People tend to
2087 do -d+all out of habit.
2089 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2090 code in os-type was giving problems when libc.so lives in lib64, like on
2093 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2094 aren't the modern standard, and it seems that some systems' include files
2095 don't always have them. Exim was already checking for some of the newer
2096 ones like T_AAAA, and defining it itself. I've added checks for all the
2097 record types that Exim uses.
2099 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2100 not automatically generating a new one, as it is supposed to. This
2101 prevented TLS from working. If the file did exist, but contained invalid
2102 data, a new version was generated, as expected. It was only the case of a
2103 non-existent file that was broken.
2105 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2106 with a change in libdomainkeys > 0.64.
2108 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2109 from DNS. If the selector record carries the flag, it now has
2110 precedence over the domain-wide flag.
2112 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2114 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2115 the use of a port name that isn't defined in /etc/services) occurred, the
2116 message was deferred as in a normal delivery, and thus remained on the
2117 spool, instead of being failed because of the mua_wrapper setting. This
2118 is now fixed, and I tidied up some of the mua_wrapper messages at the
2121 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2122 the messages in a hash of arrays rather than using individual hashes.
2123 This is a bit cleaner and results in dramatic memory savings, albeit
2124 at a slight CPU cost.
2126 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2127 as requested by Marc Sherman.
2129 SC/10 Eximstats: added histograms for user specified patterns as requested
2132 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2134 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2135 fopen() in the content-scanning modules that did not already have it.
2141 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2142 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2144 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2146 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2148 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2149 to test Sieve filters that use "vacation".
2151 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2152 that changes the way the GnuTLS parameters are stored in the cache file.
2153 The new format can be generated externally. For backward compatibility,
2154 if the data in the cache doesn't make sense, Exim assumes it has read an
2155 old-format file, and it generates new data and writes a new file. This
2156 means that you can't go back to an older release without removing the
2159 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2160 work if there are any delivery delays because "one_time" forces the
2161 parent to be marked "delivered", so its unseen clone is never tried
2162 again. For this reason, Exim now forbids the simultaneous setting of
2165 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2166 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2167 entry if you want to know the details. The fix, however, neglected to
2168 consider the case when local delivery batching is involved. The test for
2169 "previously delivered" was not happening when checking to see if an
2170 address could be batched with a previous (undelivered) one; under
2171 certain circumstances this could lead to multiple deliveries to the same
2174 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2175 in its include files, and this causes problems building Exim.
2177 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2178 header_syntax) but Exim was just ignoring anything given after a slash.
2179 In particular, this caused confusion with an attempt to use "verify =
2180 reverse_host_lookup/defer_ok". An error is now given when options are
2181 supplied for verify items that do not have them. (Maybe reverse_host_
2182 lookup should have a defer_ok option, but that's a different point.)
2184 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2185 defined by RFC 821) to 2048, because there were problems with some AUTH
2186 commands, and RFC 1869 says the size should be increased for extended
2187 SMTP commands that take arguments.
2189 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2192 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2193 "unknown" error; now it says that the functionality isn't in the binary.
2195 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2196 an address' error message when a string expansion fails (syntax or
2197 whatever). Otherwise the password may appear in the log. Following change
2198 PH/42 below, there is no longer a chance of it appearing in a bounce
2201 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2203 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2204 of its addresses was ever tried. (Bugzilla bug #2.)
2206 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2207 the result incorrectly in the debug output. (It correctly added a newline
2208 to what was transported.)
2210 TF/01 Added $received_time.
2212 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2213 commented out examples of how to interface to a virus scanner and to
2214 SpamAssassin. Also added commented examples of av_scanner and
2215 spamd_address settings.
2217 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2218 and controls are allowed in which ACLs. There were a couple of minor
2219 errors. Some of the entries in the conditions table (which is a table of
2220 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2221 negation of where the condition IS allowed.
2223 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2225 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2226 header file does not have a version number, so I've had to invent a new
2227 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2228 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2229 radiusclient), but it was contributed by a Radius user.
2231 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2232 files or directories, for OpenSSL.
2234 PH/19 When an Exim process that is running as root has to create an Exim log
2235 file, it does so in a subprocess that runs as exim:exim so as to get the
2236 ownership right at creation (otherwise, other Exim processes might see
2237 the file with the wrong ownership). There was no test for failure of this
2238 fork() call, which would lead to the process getting stuck as it waited
2239 for a non-existent subprocess. Forks do occasionally fail when resources
2240 run out. I reviewed all the other calls to fork(); they all seem to check
2243 PH/20 When checking for unexpected SMTP input at connect time (before writing
2244 the banner), Exim was not dealing correctly with a non-positive return
2245 from the read() function. If the client had disconnected by this time,
2246 the result was a log entry for a synchronization error with an empty
2247 string after "input=" when read() returned zero. If read() returned -1
2248 (an event I could not check), uninitialized data bytes were printed.
2249 There were reports of junk text (parts of files, etc) appearing after
2252 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2254 PH/22 Added support for macro redefinition, and (re)definition in between
2255 driver and ACL definitions.
2257 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2258 forgetting to use the resulting value; it was using the unexpanded value.
2260 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2261 hadn't been configured. The fix is from Juergen Kreileder, who
2262 understands it better than I do:
2264 "Here's what I see happening with three configured cyrus_sasl
2265 authenticators configured (plain, login, cram-md5):
2267 On startup auth_cyrus_sasl_init() gets called for each of these.
2268 This means three calls to sasl_listmech() without a specified mech_list.
2269 => SASL tests which mechs of all available mechs actually work
2270 => three warnings about OTP not working
2271 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2273 With the patch, sasl_listmech() also gets called three times. But now
2274 SASL's mech_list option is set to the server_mech specified in the the
2275 authenticator. Or in other words, the answer from sasl_listmech()
2276 gets limited to just the mech you're testing for (which is different
2278 => the return list contains just 'plain' or 'login', 'cram-md5' or
2279 nothing depending on the value of ob->server_mech.
2281 I've just tested the patch: Authentication still works fine,
2282 unavailable mechs specified in the exim configuration are still
2283 caught, and the auth.log warnings about OTP are gone."
2285 PH/25 When debugging is enabled, the contents of the command line are added
2286 to the debugging output, even when log_selector=+arguments is not
2289 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2290 answer is "GNU", and only if the return is "GNU/something" is the answer
2293 PH/27 $acl_verify_message is now set immediately after the failure of a
2294 verification in an ACL, and so is available in subsequent modifiers. In
2295 particular, the message can be preserved by coding like this:
2297 warn !verify = sender
2298 set acl_m0 = $acl_verify_message
2300 Previously, $acl_verify_message was set only while expanding "message"
2301 and "log_message" when a very denied access.
2303 PH/28 Modified OS/os.c-Linux with
2305 -#ifndef OS_LOAD_AVERAGE
2306 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2308 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2309 nomenclature these days.)
2311 PH/29 Installed patch from the Sieve maintainer that adds the options
2312 sieve_useraddress and sieve_subaddress to the redirect router.
2314 PH/30 In these circumstances:
2315 . Two addresses routed to the same list of hosts;
2316 . First host does not offer TLS;
2317 . First host accepts first address;
2318 . First host gives temporary error to second address;
2319 . Second host offers TLS and a TLS session is established;
2320 . Second host accepts second address.
2321 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2322 and peerdn, if requested) that were in fact used only for the second
2325 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2326 attention to any local part prefix or suffix that was matched by the
2327 router that accepted the address. It now behaves in the same way as it
2328 does for delivery: the affixes are removed from the local part unless
2329 rcpt_include_affixes is set on the transport.
2331 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2332 timeout during the DATA phase of an incoming message.
2334 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2335 applied a patch sanctioned by the Sieve maintainer.
2337 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2338 the uid or gid is negative. A case of a negative gid caused this to be
2339 noticed. The fix allows for either to be negative.
2341 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2342 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2345 PH/36 The change PH/12 above was broken. Fixed it.
2347 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2348 the grounds that routing the same address twice would always produce the
2349 same answer. This might have been true once, but it is certainly no
2350 longer true now. Routing a child address may depend on the previous
2351 routing that produced that child. Some complicated redirection strategies
2352 went wrong when messages had multiple recipients, and made Exim's
2353 behaviour dependent on the order in which the addresses were given.
2355 I have moved the duplicate checking until after the routing is complete.
2356 Exim scans the addresses that are assigned to local and remote
2357 transports, and removes any duplicates. This means that more work will be
2358 done, as duplicates will always all be routed, but duplicates are
2359 presumably rare, so I don't expect this is of any significance.
2361 For deliveries to pipes, files, and autoreplies, the duplicate checking
2362 still happens during the routing process, since they are not going to be
2365 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2366 It corrects a timeout issue with spamd. This is Ian's comment: "The
2367 background is that sometimes spamd either never reads data from a
2368 connection it has accepted, or it never writes response data. The exiscan
2369 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2370 blindly assumes that writes won't block so it may never time out."
2372 PH/39 Allow G after quota size as well as K and M.
2374 PH/40 The value set for $authenticated_id in an authenticator may not contain
2375 binary zeroes or newlines because the value is written to log lines and
2376 to spool files. There was no check on this. Now the value is run through
2377 the string_printing() function so that such characters are converted to
2378 printable escape sequences.
2380 PH/41 $message_linecount is a new variable that contains the total number of
2381 lines in the message. Compare $body_linecount, which is the count for the
2384 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2385 bounce and delay warning messages, except in certain special cases, which
2388 (a) An SMTP error message from a remote host;
2389 (b) A message specified in a :fail: redirection;
2390 (c) A message specified in a "fail" command in a system filter;
2391 (d) A message specified in a FAIL return from the queryprogram router;
2392 (e) A message specified by the cannot_route_message router option.
2394 In these cases only, Exim does include the error details in bounce and
2395 warning messages. There are also a few cases where bland messages such
2396 as "unrouteable address" or "local delivery error" are given.
2398 PH/43 $value is now also set for the "else" part of a ${run expansion.
2400 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2401 being worked on, but at least Exim now implements the latest version to
2404 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2405 process to complete was treated as a delivery failure, a timeout while
2406 writing the message to the pipe was logged, but erroneously treated as a
2407 successful delivery. Such timeouts include transport filter timeouts. For
2408 consistency with the overall process timeout, these timeouts are now
2409 treated as errors, giving rise to delivery failures by default. However,
2410 there is now a new Boolean option for the pipe transport called
2411 timeout_defer, which, if set TRUE, converts the failures into defers for
2412 both kinds of timeout. A transport filter timeout is now identified in
2415 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2416 systems where "make" and "gmake" are different, calling "gmake" at top
2417 level broke things. I've arranged for the value of $(MAKE) to be passed
2418 from the Makefile to this script so that it can call the same version of
2422 A note about Exim versions 4.44 and 4.50
2423 ----------------------------------------
2425 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2426 changes of various kinds. As a consequence, a big documentation update was
2427 needed. This delayed the release for rather longer than seemed good, especially
2428 in the light of a couple of (minor) security issues. Therefore, the changes
2429 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2430 release. So 4.44 and 4.50 are in effect two different branches that both start
2433 I have left the 4.50 change log unchanged; it contains all the changes since
2434 4.43. The change log for 4.44 is below; many of its items are identical to
2435 those for 4.50. This seems to be the most sensible way to preserve the
2436 historical information.
2442 1. Minor wording change to the doc/README.SIEVE file.
2444 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2445 computation of the current number of files was incorrect.
2447 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2448 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2451 4. Give more explanation in the error message when the command for a transport
2452 filter fails to execute.
2454 5. There are several places where Exim runs a non-Exim command in a
2455 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2456 was being done only for the command run by the queryprogram router. It is
2457 now done for all such subprocesses. The other cases are: ${run, transport
2458 filters, and the commands run by the lmtp and pipe transports.
2460 6. Added CONFIGURE_GROUP build-time option.
2462 7. Some older OS have a limit of 256 on the maximum number of file
2463 descriptors. Exim was using setrlimit() to set 1000 as a large value
2464 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2465 systems. I've change it so that if it can't get 1000, it tries for 256.
2467 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2468 was an oversight, and furthermore, ever since the addition of extra
2469 controls (e.g. 4.43/32), the checks on when to allow different forms of
2470 "control" were broken. There should now be diagnostics for all cases when a
2471 control that does not make sense is encountered.
2473 9. Added the /retain_sender option to "control=submission".
2475 10. $recipients is now available in the predata ACL (oversight).
2477 11. Tidy the search cache before the fork to do a delivery from a message
2478 received from the command line. Otherwise the child will trigger a lookup
2479 failure and thereby defer the delivery if it tries to use (for example) a
2480 cached ldap connection that the parent has called unbind on.
2482 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2483 of $address_data from the recipient verification was clobbered by the
2484 sender verification.
2486 13. The value of address_data from a sender verification is now available in
2487 $sender_address_data in subsequent conditions in the ACL statement.
2489 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2491 15. Added a new option "connect=<time>" to callout options, to set a different
2494 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2495 was its contents. (It was OK if the option was not defined at all.)
2497 17. A "Completed" log line is now written for messages that are removed from
2498 the spool by the -Mrm option.
2500 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2501 information about exactly what failed.
2503 19. Added -dd to debug only the daemon process.
2505 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2506 handles timeouts, both on the server side and network timeouts. Renamed the
2507 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2509 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2510 It is now set to "smtps".
2512 22. $host_address is now set to the target address during the checking of
2513 ignore_target_hosts.
2515 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2516 being passed; this would have caused $sender_host_name to have been used if
2517 matching the list had actually called for a host name (not very likely,
2518 since this list is usually IP addresses). A host name is now passed as
2521 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2522 code that specifies a non-restarting handler (typically sigaction() in
2523 modern systems) in an attempt to fix a rare and obscure crash bug.
2525 25. Narrowed the window for a race in the daemon that could cause it to ignore
2526 SIGCHLD signals. This is not a major problem, because they are used only to
2527 wake it up if nothing else does.
2529 26. A malformed maildirsize file could cause Exim to calculate negative values
2530 for the mailbox size or file count. Odd effects could occur as a result.
2531 The maildirsize information is now recalculated if the size or filecount
2534 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2535 support for a long time. Removed HAVE_SYS_VFS_H.
2537 28. Installed the latest version of exipick from John Jetmore.
2539 29. In an address list, if the pattern was not a regular expression, an empty
2540 subject address (from a bounce message) matched only if the pattern was an
2541 empty string. Non-empty patterns were not even tested. This was the wrong
2542 because it is perfectly reasonable to use an empty address as part of a
2543 database query. An empty address is now tested by patterns that are
2544 lookups. However, all the other forms of pattern expect the subject to
2545 contain a local part and a domain, and therefore, for them, an empty
2546 address still always fails if the pattern is not itself empty.
2548 30. Exim went into a mad DNS loop when attempting to do a callout where the
2549 host was specified on an smtp transport, and looking it up yielded more
2550 than one IP address.
2552 31. Re-factored the code for checking spool and log partition space into a
2553 function that finds that data and another that does the check. The former
2554 is then used to implement four new variables: $spool_space, $log_space,
2555 $spool_inodes, and $log_inodes.
2557 32. The RFC2047 encoding function was originally intended for short strings
2558 such as real names; it was not keeping to the 75-character limit for
2559 encoded words that the RFC imposes. It now respects the limit, and
2560 generates multiple encoded words if necessary. To be on the safe side, I
2561 have increased the buffer size for the ${rfc2047: expansion operator from
2564 33. It is now permitted to omit both strings after an "if" condition; if the
2565 condition is true, the result is "true". As before, when the second string
2566 is omitted, a false condition yields an empty string. This makes it less
2567 cumbersome to write custom ACL and router conditions.
2569 34. Failure to deliver a bounce message always caused it to be frozen, even if
2570 there was an errors_to setting on the router. The errors_to setting is now
2573 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2574 canonical form (fully expanded) before being placed in
2575 $sender_host_address.
2577 36. The table in the code that translates DNS record types into text (T_A to
2578 "A" for instance) was missing entries for NS and CNAME. It is just possible
2579 that this could have caused confusion if both these types were looked up
2580 for the same domain, because the text type is used as part of Exim's
2581 per-process caching. But the chance of anyone hitting this buglet seems
2584 37. The dnsdb lookup has been extended in a number of ways.
2586 (1) There is a new type, "zns", which walks up the domain tree until it
2587 finds some nameserver records. It should be used with care.
2589 (2) There is a new type, "mxh", which is like "mx" except that it returns
2590 just the host names, not the priorities.
2592 (3) It is now possible to give a list of domains (or IP addresses) to be
2593 looked up. The behaviour when one of the lookups defers can be
2594 controlled by a keyword.
2596 (4) It is now possible to specify the separator character for use when
2597 multiple records are returned.
2599 38. The dnslists ACL condition has been extended: it is now possible to supply
2600 a list of IP addresses and/or domains to be looked up in a particular DNS
2603 39. Added log_selector=+queue_time_overall.
2605 40. When running the queue in the test harness, wait just a tad after forking a
2606 delivery process, to get repeatability of debugging output.
2608 41. Include certificate and key file names in error message when GnuTLS fails
2609 to set them up, because the GnuTLS error message doesn't include the name
2610 of the failing file when there is a problem reading it.
2612 42. Allow both -bf and -bF in the same test run.
2614 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2616 44. The "Exiscan patch" is now merged into the mainline Exim source.
2618 45. Sometimes the final signoff response after QUIT could fail to get
2619 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2620 < 0 before doing a fflush(). This bug looks as though it goes back to the
2621 introduction of TLS in release 3.20, but "sometimes" must have been rare
2622 because the tests only now provoked it.
2624 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2625 (this can affect the format of dates).
2627 47. exim_tidydb, when checking for the continued existence of a message for
2628 which it has found a message-specific retry record, was not finding
2629 messages that were in split spool directories. Consequently, it was
2630 deleting retry records that should have stayed in existence.
2632 48. Steve fixed some bugs in eximstats.
2634 49. The SPA authentication driver was not abandoning authentication and moving
2635 on to the next authenticator when an expansion was forced to fail,
2636 contradicting the general specification for all authenticators. Instead it
2637 was generating a temporary error. It now behaves as specified.
2639 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2640 (the order specifies the preference for clients). The order is now AES256,
2641 AES128, 3DES, ARCFOUR128.
2643 51. Small patch to Sieve code - explicitly set From: when generating an
2646 52. Exim crashed if a remote delivery caused a very long error message to be
2647 recorded - for instance if somebody sent an entire SpamAssassin report back
2648 as a large number of 550 error lines. This bug was coincidentally fixed by
2649 increasing the size of one of Exim's internal buffers (big_buffer) that
2650 happened as part of the Exiscan merge. However, to be on the safe side, I
2651 have made the code more robust (and fixed the comments that describe what
2654 53. Now that there can be additional text after "Completed" in log lines (if
2655 the queue_time_overall log selector is set), a one-byte patch to exigrep
2656 was needed to allow it to recognize "Completed" as not the last thing in
2659 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2660 patch that reportedly fixes this has been added. I am not expert enough to
2661 create a test for it. This is what the patch creator wrote:
2663 "I found a little strange behaviour of ldap code when working with
2664 Windows 2003 AD Domain, where users was placed in more than one
2665 Organization Units. When I tried to give exim partial DN, the exit code
2666 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2667 But simultaneously result of request was absolutely normal ldap result,
2668 so I produce this patch..."
2670 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2671 REFERENCE, so I have modified the code to exclude the patch when that macro
2674 55. Some experimental protocols are using DNS PTR records for new purposes. The
2675 keys for these records are domain names, not reversed IP addresses. The
2676 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2677 leaves it alone. Component reversal etc. now happens only for IP addresses.
2680 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2682 57. Double the size of the debug message buffer (to 2048) so that more of very
2683 long debug lines gets shown.
2685 58. The exicyclog utility now does better if the number of log files to keep
2686 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2688 59. Two changes related to the smtp_active_hostname option:
2690 (1) $smtp_active_hostname is now available as a variable.
2691 (2) The default for smtp_banner uses $smtp_active_hostname instead
2692 of $primary_hostname.
2694 60. The host_aton() function is supposed to be passed a string that is known
2695 to be a valid IP address. However, in the case of IPv6 addresses, it was
2696 not checking this. This is a hostage to fortune. Exim now panics and dies
2697 if the condition is not met. A case was found where this could be provoked
2698 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2699 components; fortuitously, this particular loophole had already been fixed
2700 by change 4.50/55 above.
2702 If there are any other similar loopholes, the new check in host_aton()
2703 itself should stop them being exploited. The report I received stated that
2704 data on the command line could provoke the exploit when Exim was running as
2705 exim, but did not say which command line option was involved. All I could
2706 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2707 running as the user.
2710 61. There was a buffer overflow vulnerability in the SPA authentication code
2711 (which came originally from the Samba project). I have added a test to the
2712 spa_base64_to_bits() function which I hope fixes it.
2715 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2716 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2718 63. The daemon start-up calls getloadavg() while still root for those OS that
2719 need the first call to be done as root, but it missed one case: when
2720 deliver_queue_load_max is set with deliver_drop_privilege. This is
2721 necessary for the benefit of the queue runner, because there is no re-exec
2722 when deliver_drop_privilege is set.
2724 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2725 This has been fixed.
2727 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2728 was in use, was not putting the data itself into the right store pool;
2729 consequently, it could be overwritten for a subsequent message in the same
2730 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2733 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2735 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2736 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2737 the function were treating the return as a boolean value, which happened to
2738 work because 0=false and not-0=true, but is not correct code.
2740 68. The host_aton() function was not handling scoped IPv6 addresses (those
2741 with, for example, "%eth0" on the end) correctly.
2743 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2744 negated items (that is, ~something) in unsigned ints. Some compilers
2745 apparently mutter when there is no cast.
2747 70. If an address verification called from an ACL failed, and did not produce a
2748 user-specific message (i.e. there was only a "system" message), nothing was
2749 put in $acl_verify_message. In this situation, it now puts the system
2752 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2753 session; change 4.31/43 added the unwanted input to the log line - except
2754 that it did not do this in the start of session case. It now does.
2756 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2757 This is wrong and can cause the other end to generate a synchronization
2758 error if it is another Exim or anything else that does the synchronization
2759 check. A QUIT command is no longer sent after a timeout.
2761 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2762 during host lookups.
2764 74. The defer_ok option of callout verification was not working if it was used
2765 when verifying addresses in header lines, that is, for this case:
2767 verify = header_sender/callout=defer_ok
2769 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2770 those file descriptors could be used for SMTP connections. If anything
2771 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2772 could be sent to the SMTP client, causing chaos. The daemon now opens
2773 stdin, stdout, and stderr to /dev/null when it puts itself into the
2776 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2777 log by default. The user can override this with suitable Perl magic.
2779 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2780 the log message when discard triggers, was not working for the DATA ACL or
2781 for the non-SMTP ACL.
2783 78. Error message wording change in sieve.c.
2785 79. If smtp_accept_max_per_host was set, the number of connections could be
2786 restricted to fewer than expected, because the daemon was trying to set up
2787 a new connection before checking whether the processes handling previous
2788 connections had finished. The check for completed processes is now done
2789 earlier. On busy systems, this bug wouldn't be noticed because something
2790 else would have woken the daemon, and it would have reaped the completed
2793 80. If a message was submitted locally by a user whose login name contained one
2794 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2795 It caused a spool format error. I have fixed the spool reading code. A
2796 related problem was that the "from" clause in the Received: line became
2797 illegal because of the space(s). It is now covered by ${quote_local_part.
2799 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2802 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2804 83. Patch from Sieve maintainer to fix unterminated string problem in
2805 "vacation" handling.
2807 84. Some minor changes to the Linux configuration files to help with other
2808 OS variants using glibc.
2810 85. One more patch for Sieve to update vacation handling to latest spec.
2813 ----------------------------------------------------
2814 See the note above about the 4.44 and 4.50 releases.
2815 ----------------------------------------------------
2821 1. Change 4.43/35 introduced a bug that caused file counts to be
2822 incorrectly computed when quota_filecount was set in an appendfile
2825 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2826 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2829 3. Give more explanation in the error message when the command for a transport
2830 filter fails to execute.
2832 4. There are several places where Exim runs a non-Exim command in a
2833 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2834 was being done only for the command run by the queryprogram router. It is
2835 now done for all such subprocesses. The other cases are: ${run, transport
2836 filters, and the commands run by the lmtp and pipe transports.
2838 5. Some older OS have a limit of 256 on the maximum number of file
2839 descriptors. Exim was using setrlimit() to set 1000 as a large value
2840 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2841 systems. I've change it so that if it can't get 1000, it tries for 256.
2843 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2844 was an oversight, and furthermore, ever since the addition of extra
2845 controls (e.g. 4.43/32), the checks on when to allow different forms of
2846 "control" were broken. There should now be diagnostics for all cases when a
2847 control that does not make sense is encountered.
2849 7. $recipients is now available in the predata ACL (oversight).
2851 8. Tidy the search cache before the fork to do a delivery from a message
2852 received from the command line. Otherwise the child will trigger a lookup
2853 failure and thereby defer the delivery if it tries to use (for example) a
2854 cached ldap connection that the parent has called unbind on.
2856 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2857 of $address_data from the recipient verification was clobbered by the
2858 sender verification.
2860 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2861 was its contents. (It was OK if the option was not defined at all.)
2863 11. A "Completed" log line is now written for messages that are removed from
2864 the spool by the -Mrm option.
2866 12. $host_address is now set to the target address during the checking of
2867 ignore_target_hosts.
2869 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2870 being passed; this would have caused $sender_host_name to have been used if
2871 matching the list had actually called for a host name (not very likely,
2872 since this list is usually IP addresses). A host name is now passed as
2875 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2876 code that specifies a non-restarting handler (typically sigaction() in
2877 modern systems) in an attempt to fix a rare and obscure crash bug.
2879 15. Narrowed the window for a race in the daemon that could cause it to ignore
2880 SIGCHLD signals. This is not a major problem, because they are used only to
2881 wake it up if nothing else does.
2883 16. A malformed maildirsize file could cause Exim to calculate negative values
2884 for the mailbox size or file count. Odd effects could occur as a result.
2885 The maildirsize information is now recalculated if the size or filecount
2888 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2889 support for a long time. Removed HAVE_SYS_VFS_H.
2891 18. Updated exipick to current release from John Jetmore.
2893 19. Allow an empty sender to be matched against a lookup in an address list.
2894 Previously the only cases considered were a regular expression, or an
2897 20. Exim went into a mad DNS lookup loop when doing a callout where the
2898 host was specified on the transport, if the DNS lookup yielded more than
2901 21. The RFC2047 encoding function was originally intended for short strings
2902 such as real names; it was not keeping to the 75-character limit for
2903 encoded words that the RFC imposes. It now respects the limit, and
2904 generates multiple encoded words if necessary. To be on the safe side, I
2905 have increased the buffer size for the ${rfc2047: expansion operator from
2908 22. Failure to deliver a bounce message always caused it to be frozen, even if
2909 there was an errors_to setting on the router. The errors_to setting is now
2912 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2913 canonical form (fully expanded) before being placed in
2914 $sender_host_address.
2916 24. Updated eximstats to version 1.33
2918 25. Include certificate and key file names in error message when GnuTLS fails
2919 to set them up, because the GnuTLS error message doesn't include the name
2920 of the failing file when there is a problem reading it.
2922 26. Expand error message when OpenSSL has problems setting up cert/key files.
2925 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2926 (this can affect the format of dates).
2928 28. exim_tidydb, when checking for the continued existence of a message for
2929 which it has found a message-specific retry record, was not finding
2930 messages that were in split spool directories. Consequently, it was
2931 deleting retry records that should have stayed in existence.
2933 29. eximstats updated to version 1.35
2934 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2935 1.35 - bugfix such that pie charts by volume are generated correctly
2937 30. The SPA authentication driver was not abandoning authentication and moving
2938 on to the next authenticator when an expansion was forced to fail,
2939 contradicting the general specification for all authenticators. Instead it
2940 was generating a temporary error. It now behaves as specified.
2942 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2943 (the order specifies the preference for clients). The order is now AES256,
2944 AES128, 3DES, ARCFOUR128.
2946 31. Small patch to Sieve code - explicitly set From: when generating an
2949 32. Exim crashed if a remote delivery caused a very long error message to be
2950 recorded - for instance if somebody sent an entire SpamAssassin report back
2951 as a large number of 550 error lines. This bug was coincidentally fixed by
2952 increasing the size of one of Exim's internal buffers (big_buffer) that
2953 happened as part of the Exiscan merge. However, to be on the safe side, I
2954 have made the code more robust (and fixed the comments that describe what
2957 33. Some experimental protocols are using DNS PTR records for new purposes. The
2958 keys for these records are domain names, not reversed IP addresses. The
2959 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2960 leaves it alone. Component reversal etc. now happens only for IP addresses.
2963 34. The host_aton() function is supposed to be passed a string that is known
2964 to be a valid IP address. However, in the case of IPv6 addresses, it was
2965 not checking this. This is a hostage to fortune. Exim now panics and dies
2966 if the condition is not met. A case was found where this could be provoked
2967 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2968 components; fortuitously, this particular loophole had already been fixed
2969 by change 4.50/55 or 4.44/33 above.
2971 If there are any other similar loopholes, the new check in host_aton()
2972 itself should stop them being exploited. The report I received stated that
2973 data on the command line could provoke the exploit when Exim was running as
2974 exim, but did not say which command line option was involved. All I could
2975 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2976 running as the user.
2979 35. There was a buffer overflow vulnerability in the SPA authentication code
2980 (which came originally from the Samba project). I have added a test to the
2981 spa_base64_to_bits() function which I hope fixes it.
2984 36. The daemon start-up calls getloadavg() while still root for those OS that
2985 need the first call to be done as root, but it missed one case: when
2986 deliver_queue_load_max is set with deliver_drop_privilege. This is
2987 necessary for the benefit of the queue runner, because there is no re-exec
2988 when deliver_drop_privilege is set.
2990 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2991 was in use, was not putting the data itself into the right store pool;
2992 consequently, it could be overwritten for a subsequent message in the same
2993 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2996 38. Sometimes the final signoff response after QUIT could fail to get
2997 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2998 < 0 before doing a fflush(). This bug looks as though it goes back to the
2999 introduction of TLS in release 3.20, but "sometimes" must have been rare
3000 because the tests only now provoked it.
3006 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3007 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3008 Now it returns an integer. A number of calls were still expecting a T/F
3009 return. Fortuitously, in all cases, the tests worked in OK situations,
3010 which is the norm. However, things would have gone wrong on any write
3011 failures on the smtp file descriptor. This function is used when sending
3012 messages over SMTP and also when doing verify callouts.
3014 2. When Exim is called to do synchronous delivery of a locally submitted
3015 message (the -odf or -odi options), it no longer closes stderr before doing
3018 3. Implemented the mua_wrapper option.
3020 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3022 5. Implemented the functions header_remove(), header_testname(),
3023 header_add_at_position(), and receive_remove_recipient(), and exported them
3026 6. If an ACL "warn" statement specified the addition of headers, Exim already
3027 inserted X-ACL-Warn: at the start if there was no header name. However, it
3028 was not making this test for the second and subsequent header lines if
3029 there were newlines in the string. This meant that an invalid header could
3030 be inserted if Exim was badly configured.
3032 7. Allow an ACL "warn" statement to add header lines at the start or after all
3033 the Received: headers, as well as at the end.
3035 8. Added the rcpt_4xx retry error code.
3037 9. Added postmaster_mailfrom=xxx to callout verification option.
3039 10. Added mailfrom=xxxx to the callout verification option, for verify=
3042 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3043 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3045 12. Inserted some casts to stop certain compilers warning when using pointer
3046 differences as field lengths or precisions in printf-type calls (mostly
3047 affecting debugging statements).
3049 13. Added optional readline() support for -be (dynamically loaded).
3051 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3052 same clock tick as a message's arrival, so that its received time was the
3053 same as the "first fail" time on the retry record, and that message
3054 remained on the queue past the ultimate address timeout, every queue runner
3055 would try a delivery (because it was past the ultimate address timeout) but
3056 after another failure, the ultimate address timeout, which should have then
3057 bounced the address, did not kick in. This was a "< instead of <=" error;
3058 in most cases the first failure would have been in the next clock tick
3059 after the received time, and all would be well.
3061 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3062 being recognized when the domain list was tested by the match_domain
3063 condition in an expansion string.
3065 16. Added the ${str2b64: operator.
3067 17. Exim was always calling setrlimit() to set a large limit for the number of
3068 processes, without checking whether the existing limit was already
3069 adequate. (It did check for the limit on file descriptors.) Furthermore,
3070 errors from getrlimit() and setrlimit() were being ignored. Now they are
3071 logged to the main and panic logs, but Exim does carry on, to try to do its
3072 job under whatever limits there are.
3074 18. Imported PCRE 5.0.
3076 19. Trivial typo in log message " temporarily refused connection" (the leading
3079 20. If the log selector return_path_on_delivery was set and an address was
3080 redirected to /dev/null, the delivery process crashed because it assumed
3081 that a return path would always be set for a "successful" delivery. In this
3082 case, the whole delivery is bypassed as an optimization, and therefore no
3085 21. Internal re-arrangement: the function for sending a challenge and reading
3086 a response while authentication was assuming a zero-terminated challenge
3087 string. It's now changed to take a pointer and a length, to allow for
3088 binary data in such strings.
3090 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3092 23. Exim was not respecting finduser_retries when seeking the login of the
3093 uid under which it was called; it was always trying 10 times. (The default
3094 setting of finduser_retries is zero.) Also, it was sleeping after the final
3095 failure, which is pointless.
3097 24. Implemented tls_on_connect_ports.
3099 25. Implemented acl_smtp_predata.
3101 26. If the domain in control=submission is set empty, Exim assumes that the
3102 authenticated id is a complete email address when it generates From: or
3103 Sender: header lines.
3105 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3106 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3107 chown and chgrp in /bin and hostname in /usr/bin.
3109 28. Exim was keeping the "process log" file open after each use, just as it
3110 does for the main log. This opens the possibility of it remaining open for
3111 long periods when the USR1 signal hits a daemon. Occasional processlog
3112 errors were reported, that could have been caused by this. Anyway, it seems
3113 much more sensible not to leave this file open at all, so that is what now
3116 29. The long-running daemon process does not normally write to the log once it
3117 has entered its main loop, and it closes the log before doing so. This is
3118 so that log files can straightforwardly be renamed and moved. However,
3119 there are a couple of unusual error situations where the daemon does write
3120 log entries, and I had neglected to close the log afterwards.
3122 30. The text of an SMTP error response that was received during a remote
3123 delivery was being truncated at 512 bytes. This is too short for some of
3124 the long messages that one sometimes sees. I've increased the limit to
3127 31. It is now possible to make retry rules that apply only when a message has a
3128 specific sender, in particular, an empty sender.
3130 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3131 it possible to be selective about when SMTP synchronization is enforced.
3133 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3135 32. Implemented hosts_connection_nolog.
3137 33. Added an ACL for QUIT.
3139 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3142 35. Added mailbox_size and mailbox_filecount to appendfile.
3144 36. Added control = no_multiline_responses to ACLs.
3146 37. There was a bug in the logic of the code that waits for the clock to tick
3147 in the case where the clock went backwards by a substantial amount such
3148 that the microsecond fraction of "now" was more than the microsecond
3149 fraction of "then" (but the whole seconds number was less).
3151 38. Added support for the libradius Radius client library this is found on
3152 FreeBSD (previously only the radiusclient library was supported).
3158 1. When certain lookups returned multiple values in the form name=value, the
3159 quoting of the values was not always being done properly. Specifically:
3160 (a) If the value started with a double quote, but contained no whitespace,
3162 (b) If the value contained whitespace other than a space character (i.e.
3163 tabs or newlines or carriage returns) it was not quoted.
3164 This fix has been applied to the mysql and pgsql lookups by writing a
3165 separate quoting function and calling it from the lookup code. The fix
3166 should probably also be applied to nisplus, ibase and oracle lookups, but
3167 since I cannot test any of those, I have not disturbed their existing code.
3169 2. A hit in the callout cache for a specific address caused a log line with no
3170 reason for rejecting RCPT. Now it says "Previous (cached) callout
3171 verification failure".
3173 3. There was an off-by-one bug in the queryprogram router. An over-long
3174 return line was truncated at 256 instead of 255 characters, thereby
3175 overflowing its buffer with the terminating zero. As well as fixing this, I
3176 have increased the buffer size to 1024 (and made a note to document this).
3178 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3179 when Exim is waiting for an SMTP response from a remote server, Exim
3180 restarts its select() call on the socket, thereby resetting its timeout.
3181 This is not a problem when such interrupts are rare. Somebody set up a cron
3182 job to run exiwhat every 2 minutes, which is less than the normal select()
3183 timeout (5 or 10 minutes). This meant that the select() timeout never
3184 kicked in because it was always reset. I have fixed this by comparing the
3185 time when an interrupt arrives with the time at the start of the first call
3186 to select(). If more time than the timeout has elapsed, the interrupt is
3187 treated as a timeout.
3189 5. Some internal re-factoring in preparation for the addition of Sieve
3190 extensions (by MH). In particular, the "personal" test is moved to a
3191 separate function, and given an option for scanning Cc: and Bcc: (which is
3192 not set for Exim filters).
3194 6. When Exim created an email address using the login of the caller as the
3195 local part (e.g. when creating a From: or Sender: header line), it was not
3196 quoting the local part when it contained special characters such as @.
3198 7. Installed new OpenBSD configuration files.
3200 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3201 try to make them clearer.
3203 9. Callout options, other than the timeout value, were being ignored when
3204 verifying sender addresses in header lines. For example, when using
3206 verify = header_sender/callout=no_cache
3208 the cache was (incorrectly) being used.
3210 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3211 only the Cygwin environment.
3213 11. When return_path_on_delivery was set as a log selector, if different remote
3214 addresses in the same message used different return paths and parallel
3215 remote delivery occurred, the wrong values would sometimes be logged.
3216 (Whenever a remote delivery process finished, the return path value from
3217 the most recently started remote delivery process was logged.)
3219 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3220 lines when AUTH and/or TLS are in use. This is the "received protocol"
3221 field. Exim used to use "asmtp" for authenticated SMTP, without any
3222 indication (in the protocol name) for TLS use. Now it follows the RFC and
3223 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3224 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3225 names appear in log lines as well as in Received: header lines.
3227 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3228 extensions, and comparison tests, and to fix some bugs.
3230 14. Changes to the "personal" filter test:
3232 (1) The test was buggy in that it was just doing the equivalent of
3233 "contains" tests on header lines. For example, if a user's address was
3234 anne@some.where, the "personal" test would incorrectly be true for
3236 To: susanne@some.where
3238 This test is now done by extracting each address from the header in turn,
3239 and checking the entire address. Other tests that are part of "personal"
3240 are now done using regular expressions (for example, to check local parts
3241 of addresses in From: header lines).
3243 (2) The list of non-personal local parts in From: addresses has been
3244 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3245 taken from the Sieve specification recommendations.
3247 (3) If the message contains any header line starting with "List-" it is
3248 treated as non-personal.
3250 (4) The test for "circular" in the Subject: header line has been removed
3251 because it now seems ill-conceived.
3253 15. Minor typos in src/EDITME comments corrected.
3255 16. Installed latest exipick from John Jetmore.
3257 17. If headers_add on a router specified a text string that was too long for
3258 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3259 of string_sprintf() is now avoided.
3261 18. $message_body_size was not set (it was always zero) when running the DATA
3262 ACL and the local_scan() function.
3264 19. For the "mail" command in an Exim filter, no default was being set for
3265 the once_repeat time, causing a random time value to be used if "once" was
3266 specified. (If the value happened to be <= 0, no repeat happened.) The
3267 default is now 0s, meaning "never repeat". The "vacation" command was OK
3268 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3269 (I found it when inspecting the code).
3271 20. There is now an overall timeout for performing a callout verification. It
3272 defaults to 4 times the callout timeout, which applies to individual SMTP
3273 commands during the callout. The overall timeout applies when there is more
3274 than one host that can be tried. The timeout is checked before trying the
3275 next host. This prevents very long delays if there are a large number of
3276 hosts and all are timing out (e.g. when the network connections are timing
3277 out). The value of the overall timeout can be changed by specifying an
3278 additional sub-option for "callout", called "maxwait". For example:
3280 verify = sender/callout=5s,maxwait=20s
3282 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3283 to the end before writing, but this should make it even safer).
3285 22. Exim was forgetting that it had advertised PIPELINING for the second and
3286 subsequent messages on an SMTP connection. It was also not resetting its
3287 memory on STARTTLS and an internal HELO.
3289 23. When Exim logs an SMTP synchronization error within a session, it now
3290 records whether PIPELINING has been advertised or not.
3292 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3293 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3294 rather than long int.
3296 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3298 26. Added the never_mail option to autoreply.
3304 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3305 crash if the getsockname() call failed; this can happen if a connection is
3306 closed very soon after it is established. The problem was simply in the
3307 order in which certain operations were done, causing Exim to try to write
3308 to the SMTP stream before it had set up the file descriptor. The bug has
3309 been fixed by making things happen in the correct order.
3315 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3316 before the connection was closed, thus losing the rejection response.
3318 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3319 some early Solaris releases, but causes trouble in current releases where
3320 socklen_t is defined.
3322 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3325 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3328 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3329 that releasing the top of it at the end releases what was used for sub-
3330 expansions (unless the block got too big). However, discard this block if
3331 the first thing is a variable or header, so that we can use its block when
3332 it is dynamic (useful for very large $message_headers, for example).
3334 6. Lookups now cache *every* query, not just the most recent. A new, separate
3335 store pool is used for this. It can be recovered when all lookup caches are
3336 flushed. Lookups now release memory at the end of their result strings.
3337 This has involved some general refactoring of the lookup sources.
3339 7. Some code has been added to the store_xxx() functions to reduce the amount
3340 of flapping under certain conditions.
3342 8. log_incoming_interface used to affect only the <= reception log lines. Now
3343 it causes the local interface and port to be added to several more SMTP log
3344 lines, for example "SMTP connection from", and rejection lines.
3346 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3348 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3350 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3351 could be overwritten at the end of the current message (or the start of a
3352 new message if it was set in a HELO ACL). The value is now preserved for
3353 the duration of the SMTP connection.
3355 12. If a transport had a headers_rewrite setting, and a matching header line
3356 contained an unqualified address, that address was qualified, even if it
3357 did not match any rewriting rules. The underlying bug was that the values
3358 of the flags that permit the existence of unqualified sender and recipient
3359 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3360 non-local messages, and by -bnq for local messages) were not being
3361 preserved with the message after it was received.
3363 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3364 "next input=" as part of the text comprising the host identity instead of
3365 the correct text. The code was using the same buffer for two different
3366 strings. However, depending on which order the printing function evaluated
3367 its arguments, the bug did not always show up. Under Linux, for example, my
3368 test suite worked just fine.
3370 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3371 doesn't work with some older versions of Perl. It has been changed to "my",
3372 which in any case is probably the better facility to use.
3374 15. A really picky compiler found some instances of statements for creating
3375 error messages that either had too many or two few arguments for the format
3378 16. The size of the buffer for calls to the DNS resolver has been increased
3379 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3380 for addresses that have a lot of PTR records. This alleviates a problem; it
3381 does not fully solve it.
3383 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3384 buffer now truncates the list and logs the incident, which is the same
3385 action as happens when Exim is looking up a host name and its aliases.
3386 Previously in this situation something unpredictable would happen;
3387 sometimes it was "internal error: store_reset failed".
3389 18. If a server dropped the connection unexpectedly when an Exim client was
3390 using GnuTLS and trying to read a response, the client delivery process
3391 crashed while trying to generate an error log message.
3393 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3394 string, for example:
3396 warn message = H1: something\nH2: something
3398 the text was added as a single header line from Exim's point of view
3399 though it ended up OK in the delivered message. However, searching for the
3400 second and subsequent header lines using $h_h2: did not work. This has been
3401 fixed. Similarly, if a system filter added multiple headers in this way,
3402 the routers could not see them.
3404 20. Expanded the error message when iplsearch is called with an invalid key to
3405 suggest using net-iplsearch in a host list.
3407 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3408 ACLs are no longer actually imposed (and a message to that effect is
3411 22. If a "gecos" field in a passwd entry contained escaped characters, in
3412 particular, if it contained a \" sequence, Exim got it wrong when building
3413 a From: or a Sender: header from that name. A second bug also caused
3414 incorrect handling when an unquoted " was present following a character
3415 that needed quoting.
3417 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3418 was not being matched caselessly.
3420 24. Arranged for all hyphens in the exim.8 source to be escaped with
3423 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3424 properly. Recipient callout cache records were still being keyed to include
3425 the sender, even when use_sender was set false. This led to far more
3426 callouts that were necessary. The sender is no longer included in the key
3427 when use_sender is false.
3429 26. Added "control = submission" modifier to ACLs.
3431 27. Added the ${base62d: operator to decode base 62 numbers.
3433 28. dnsdb lookups can now access SRV records.
3435 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3436 the configuration file.
3438 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3439 (-v) mode. This makes the output for a verbose queue run more intelligible.
3441 31. Added a use_postmaster feature to recipient callouts.
3443 32. Added the $body_zerocount variable, containing the number of binary zero
3444 bytes in the message body.
3446 33. The time of last modification of the "new" subdirectory is now used as the
3447 "mailbox time last read" when there is a quota error for a maildir
3450 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3452 35. Added +ignore_unknown as a special item in host lists.
3454 36. Code for decoding IPv6 addresses in host lists is now included, even if
3455 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3456 address was recognized as an IP address, but was then not correctly decoded
3457 into binary, causing unexpected and incorrect effects when compared with
3464 1. Very minor rewording of debugging text in manualroute to say "list of
3465 hosts" instead of "hostlist".
3467 2. If verify=header_syntax was set, and a header line with an unqualified
3468 address (no domain) and a large number of spaces between the end of the
3469 name and the colon was received, the reception process suffered a buffer
3470 overflow, and (when I tested it) crashed. This was caused by some obsolete
3471 code that should have been removed. The fix is to remove it!
3473 3. When running in the test harness, delay a bit after writing a bounce
3474 message to get a bit more predictability in the log output.
3476 4. Added a call to search_tidyup() just before forking a reception process. In
3477 theory, someone could use a lookup in the expansion of smtp_accept_max_
3478 per_host which, without the tidyup, could leave open a database connection.
3480 5. Added the variables $recipient_data and $sender_data which get set from a
3481 lookup success in an ACL "recipients" or "senders" condition, or a router
3482 "senders" option, similar to $domain_data and $local_part_data.
3484 6. Moved the writing of debug_print from before to after the "senders" test
3487 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3488 problems for message scanning, either using a data ACL, or using
3489 local_scan() because the Received: header was not generated till after they
3490 were called (in order to set the time as the time of reception completion).
3491 I have revised the way this works. The header is now generated after the
3492 body is received, but before the ACL or local_scan() are called. After they
3493 are run, the timestamp in the header is updated.
3499 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3500 before starting a queue runner without re-exec. This happened only when
3501 deliver_drop_privilege was set or when the Exim user was set to root. The
3502 effect of the bug was that timeouts during subsequent deliveries caused
3503 crashes instead of being properly handled. The handler is now left at its
3504 default (and expected) setting.
3506 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3507 message, again when deliver_drop_privilege is set or Exim is run as root.
3508 The bug described in (1) was not present in this case, but the tidying up
3509 of the other signals was missing. I have made the two cases consistent.
3511 3. The ignore_target_hosts setting on a manualroute router was being ignored
3512 for hosts that were looked up using the /MX notation.
3514 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3517 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3518 operated on the sender address. After changing the $sender_address to <>
3519 for the sender address verify, Exim was re-instated it as the original
3520 (before rewriting) address, but remembering that it had rewritten it, so it
3521 wasn't rewriting it again. This bug also had the effect of breaking the
3522 sender address verification caching when the sender address was rewritten.
3524 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3525 This has been changed so that if the ip literal address matches
3526 ignore_target_hosts, the router declines.
3528 7. Added expansion conditions match_domain, match_address, and match_local_
3529 part (NOT match_host).
3531 8. The placeholder for the Received: header didn't have a length field set.
3533 9. Added code to Exim itself and to exim_lock to test for a specific race
3534 condition that could lead to file corruption when using MBX delivery. The
3535 issue is with the lockfile that is created in /tmp. If this file is removed
3536 after a process has opened it but before that process has acquired a lock,
3537 there is the potential for a second process to recreate the file and also
3538 acquire a lock. This could lead to two Exim processes writing to the file
3539 at the same time. The added code performs the same test as UW imapd; it
3540 checks after acquiring the lock that its file descriptor still refers to
3541 the same named file.
3543 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3544 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3547 11. Added the smtp_active_hostname option. If used, this will typically be made
3548 to depend on the incoming interface address. Because $interface_address is
3549 not set up until the daemon has forked a reception process, error responses
3550 that can happen earlier (such as "too many connections") no longer contain
3553 12. If an expansion in a condition on a "warn" statement fails because a lookup
3554 defers, the "warn" statement is abandoned, and the next ACL statement is
3555 processed. Previously this caused the whole ACL to be aborted.
3557 13. Added the iplsearch lookup type.
3559 14. Added ident_timeout as a log selector.
3561 15. Added tls_certificate_verified as a log selector.
3563 16. Added a global option tls_require_ciphers (compare the smtp transport
3564 option of the same name). This controls incoming TLS connections.
3566 17. I finally figured out how to make tls_require_ciphers do a similar thing
3567 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3568 before starting the TLS session.
3570 18. Tabs are now shown as \t in -bP output.
3572 19. If the log selector return_path_on_delivery was set, Exim crashed when
3573 bouncing a message because it had too many Received: header lines.
3575 20. If two routers both had headers_remove settings, and the first one included
3576 a superfluous trailing colon, the final name in the first list and the
3577 first name in the second list were incorrectly joined into one item (with a
3578 colon in the middle).
3584 1. Added -C and -D options to the exinext utility, mainly to make it easier
3585 to include in the automated testing, but these could be helpful when
3586 multiple configurations are in use.
3588 2. The exinext utility was not formatting the output nicely when there was
3589 an alternate port involved in the retry record key, nor when there was a
3590 message id as well (for retries that were specific to a specific message
3591 and a specific host). It was also confused by IPv6 addresses, because of
3592 the additional colons they contain. I have fixed the IPv4 problem, and
3593 patched it up to do a reasonable job for IPv6.
3595 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3596 delivery, the log line now contains "pipelined" if PIPELINING was used.
3598 4. An SMTP transport process used to panic and die if the bind() call to set
3599 an explicit outgoing interface failed. This has been changed; it is now
3600 treated in the same way as a connect() failure.
3602 5. A reference to $sender_host_name in the part of a conditional expansion
3603 that was being skipped was still causing a DNS lookup. This no longer
3606 6. The def: expansion condition was not recognizing references to header lines
3607 that used bh_ and bheader_.
3609 7. Added the _cache feature to named lists.
3611 8. The code for checking quota_filecount in the appendfile transport was
3612 allowing one more file than it should have been.
3614 9. For compatibility with Sendmail, the command line option
3622 and sets the incoming protocol and host name (for trusted callers). The
3623 host name and its colon can be omitted when only the protocol is to be set.
3624 Note the Exim already has two private options, -pd and -ps, that refer to
3625 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3626 "s", but I don't think that's a major issue.
3628 10. A number of refactoring changes to the code, none of which should affect
3631 (a) The number of logging options was getting close to filling up the
3632 32-bit word that was used as a bit map. I have split them into two classes:
3633 those that are passed in the argument to log_write(), and those that are
3634 only ever tested independently outside of that function. These are now in
3635 separate 32-bit words, so there is plenty of room for expansion again.
3636 There is no change in the user interface or the logging behaviour.
3638 (b) When building, for example, log lines, the code previously used a
3639 macro that called string_cat() twice, in order to add two strings. This is
3640 not really sufficiently general. Furthermore, there was one instance where
3641 it was actually wrong because one of the argument was used twice, and in
3642 one call a function was used. (As it happened, calling the function twice
3643 did not affect the overall behaviour.) The macro has been replaced by a
3644 function that can join an arbitrary number of extra strings onto a growing
3647 (c) The code for expansion conditions now uses a table and a binary chop
3648 instead of a serial search (which was left over from when there were very
3649 few conditions). Also, it now recognizes conditions like "pam" even when
3650 the relevant support is not compiled in: a suitably worded error message is
3651 given if an attempt is made to use such a condition.
3653 11. Added ${time_interval:xxxxx}.
3655 12. A bug was causing one of the ddress fields not to be passed back correctly
3656 from remote delivery subprocesses. The field in question was not being
3657 subsequently used, so this caused to problems in practice.
3659 13. Added new log selectors queue_time and deliver_time.
3661 14. Might have fixed a bug in maildirsizefile handling that threw up
3662 "unexpected character" debug warnings, and recalculated the data
3663 unnecessarily. In any case, I expanded the warning message to give more
3666 15. Added the message "Restricted characters in address" to the statements in
3667 the default ACL that block characters like @ and % in local parts.
3669 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3670 Three changes have been made:
3672 (a) There was a serious bug; a negative response to MAIL caused the whole
3673 recipient domain to be cached as invalid, thereby blocking all messages
3674 to all local parts at the same domain, from all senders. This bug has
3675 been fixed. The domain is no longer cached after a negative response to
3676 MAIL if the sender used is not empty.
3678 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3681 (c) A new callout option, "use_sender" has been added for people who want
3682 the modified behaviour.
3688 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3691 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3692 indeed breaks things for older releases.
3694 3. Added additional logging to the case where there is a problem reading data
3695 from a filter that is running in a subprocess using a pipe, in order to
3696 try to track down a specific problem.
3698 4. Testing facility fudge: when running in the test harness and attempting
3699 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3700 getting "No route to host". Convert this to a timeout.
3702 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3705 6. Some OS don't have socklen_t but use size_t instead. This affects the
3706 fifth argument of getsockopt() amongst other things. This is now
3707 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3708 can be set for individual OS. I have set it for SunOS5, OSF1, and
3709 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3710 some earlier ones do not.
3712 7. Change 4.30/15 was not doing the test caselessly.
3714 8. The standard form for an IPv6 address literal was being rejected by address
3715 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3716 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3717 this, as well as the form without the "IPv6" on the front (but only when
3718 address literals are enabled, of course).
3720 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3722 10. Exim crashed if a message with an empty sender address specified by -f
3723 encountered a router with an errors_to setting. This could be provoked only
3724 by a command such as
3728 where an empty string was supplied; "<>" did not hit this bug.
3730 11. Installed PCRE release 4.5.
3732 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3733 remained set. It is now erased.
3735 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3736 times from message ids (which are base 36 rather than the normal 62).
3738 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3739 were being counted as actual protocol errors, and logged if the log
3740 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3741 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3742 and DATA following a set of rejected RCPTs do not count as protocol errors.
3743 In other words, Exim assumes they were pipelined, though this may not
3744 actually be the case. Of course, in all cases the client gets an
3745 appropriate error code.
3747 15. If a lookup fails in an ACL condition, a message about the failure may
3748 be available; it is used if testing the ACL cannot continue, because most
3749 such messages specify what the cause of the deferral is. However, some
3750 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3751 that caused an old message to be retained and used if a later statement
3752 caused a defer, replacing the real cause of the deferral.
3754 16. If an IP address had so many PTR records that the DNS lookup buffer
3755 was not large enough to hold them, Exim could crash while trying to process
3756 the truncated data. It now detects and logs this case.
3758 17. Further to 4.21/58, another change has been made: if (and only if) the
3759 first line of a message (the first header line) ends with CRLF, a bare LF
3760 in a subsequent header line has a space inserted after it, so as not to
3761 terminate the header.
3763 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3764 unnecessarily, used atoi() instead of strtol(), and didn't check the
3765 termination when getting file sizes from file names by regex.
3767 19. Completely re-implemented the support for maildirsize files, in the light
3768 of a number of problems with the previous contributed implementation
3769 (4.30/29). In particular:
3771 . If the quota is zero, the maildirsize file is maintained, but no quota is
3774 . If the maildir directory does not exist, it is created before any attempt
3775 to write a maildirsize file.
3777 . The quota value in the file is just a cache; if the quota is changed in
3778 the transport, the new value overrides.
3780 . A regular expression is available for excluding directories from the
3783 20. The autoreply transport checks the characters in options that define the
3784 message's headers; it allows continued headers, but it was checking with
3785 isspace() after an embedded newline instead of explicitly looking for a
3788 21. If all the "regular" hosts to which an address was routed had passed their
3789 expiry times, and had not reached their retry times, the address was
3790 bounced, even if fallback hosts were defined. Now Exim should go on to try
3793 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3794 equivalent code in the SMTP transport. Some hosts send humungous responses
3795 to HELO/EHLO, more than 1024 it seems.
3797 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3798 gives compiler warnings in some environments. I've now done it "properly",
3801 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3802 (because of problems with the built-in one) was declared to return uschar *
3803 instead of char *, causing compiler failure.
3805 25. Fixed a file descriptor leak when processing alias/forward files.
3807 26. Fixed a minor format string issue in dbfn.c.
3809 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3811 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3812 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3815 29. When a sender address is verified, it is cached, to save repeating the test
3816 when there is more than one recipient in a message. However, when the
3817 verification involves a callout, it is possible for different callout
3818 options to be set for different recipients. It is too complicated to keep
3819 track of this in the cache, so now Exim always runs a verification when a
3820 callout is required, relying on the callout cache for the optimization.
3821 The overhead is duplication of the address routing, but this should not be
3824 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3825 to be verified with callout=postmaster, and the main callout worked but the
3826 postmaster check failed, the verification correctly failed. However, if a
3827 subsequent RCPT command asked for sender verification *without* the
3828 postmaster check, incorrect caching caused this verification also to fail,
3831 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3832 it was not caching the DNS options (qualify_single, search_parents) that
3833 were used when the lookup failed. A subsequent lookup with different
3834 options therefore always gave the same answer, though there were cases
3835 where it should not have. (Example: a "domains = !$mx_any" option on a
3836 dnslookup router: the "domains" option is always processed without any
3837 widening, but the router might have qualify_single set.) Now Exim uses the
3838 cached value only when the same options are set.
3840 32. Added John Jetmore's "exipick" utility to the distribution.
3842 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3843 than a timeout (e.g. a certificate is required, and is not provided), an
3844 Exim server now closes the connection immediately. Previously it waited for
3845 the client to close - but if the client is SSL, it seems that they each
3846 wait for each other, leading to a delay before one of them times out.
3848 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3849 maintained 0.8.x compatibility because I don't think many are using it, and
3850 it is clearly obsolete.
3852 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3855 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3856 client certificate was expired. A simple patch fixes this, though I don't
3857 understand the full logic of why the verify callback is called multiple
3860 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3861 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3862 which causes problems with some clients (such as the Certicom SSL Plus
3863 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3864 disables the coutermeasure allowing Eudora to connect."
3866 38. Exim was not checking that a write() to a log file succeeded. This could
3867 lead to Bad Things if a log got too big, in particular if it hit a file
3868 size limit. Exim now panics and dies if it cannot write to a log file, just
3869 as it does if it cannot open a log file.
3871 39. Modified OS/Makefile-Linux so that it now contains
3873 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3875 The two -D definitions ensure that Exim is compiled with large file
3876 support, which makes it possible to handle log files that are bigger than
3879 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3880 instance) a domain was checked against a named list that involved a lookup,
3881 causing $domain_data to be set, then another domain was checked against the
3882 same list, then the first domain was re-checked, the value of $domain_data
3883 after the final check could be wrong. In particular, if the second check
3884 failed, it could be set empty. This bug probably also applied to
3887 41. The strip_trailing_dot option was not being applied to the address given
3888 with the -f command-line option.
3890 42. The code for reading a message's header from the spool was incrementing
3891 $received_count, but never initializing it. This meant that the value was
3892 incorrect (doubled) while delivering a message in the same process in which
3893 it was received. In the most common configuration of Exim, this never
3894 happens - a fresh exec is done - but it can happen when
3895 deliver_drop_privilege is set.
3897 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3898 it now includes up to 150 characters of the unexpected data in the log
3901 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3902 and building data strings. The size of both of these buffers was 10 000
3903 bytes - far larger than anybody would *ever* want, thought I. Needless to
3904 say, somebody hit the limit. I have increased the maximum line length to
3905 20 000 and the maximum data length of concatenated lines to 100 000. I have
3906 also fixed two bugs, because there was no checking on these buffers. Tsk,
3907 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3908 buffer is too small.
3910 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3911 lsearch lookups. Now it does.
3913 46. When parsing a route_list item in a manualroute router, a fixed-length
3914 buffer was used for the list of hosts. I made this 1024 bytes long,
3915 thinking that nobody would ever have a list of hosts that long. Wrong.
3916 Somebody had a whole pile of complicated expansion conditions, and the
3917 string was silently truncated, leading to an expansion error. It turns out
3918 that it is easier to change to an unlimited length (owing to other changes
3919 that have happened since this code was originally written) than to build
3920 structure for giving a limitation error. The length of the item that
3921 expands into the list of hosts is now unlimited.
3923 47. The lsearch lookup could not handle data where the length of text line was
3924 more than 4095 characters. Such lines were truncated, leading to shortened
3925 data being returned. It should now handle lines of any length.
3927 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3928 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3931 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3932 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3933 no longer happens in comment lines. A list of replacements is now placed
3934 at the head of all of the source files, except those whose only change is
3935 to replace PERL_COMMAND in the very first #! line.
3937 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3938 messages on the queue, with a bottom-up merge sort, using code contributed
3939 by Michael Haardt. This should make operations like -bp somewhat faster on
3940 large queues. It won't affect queue runners, except when queue_run_in_order
3943 51. Installed eximstats 1.31 in the distribution.
3945 52. Added support for SRV lookups to the dnslookup router.
3947 53. If an ACL referred to $message_body or $message_body_end, the value was not
3948 reset for any messages that followed in the same SMTP session.
3950 54. The store-handling optimization for building very long strings was not
3951 differentiating between the different store pools. I don't think this
3952 actually made any difference in practice, but I've tidied it.
3954 55. While running the routers to verify a sender address, $sender_address
3955 was still set to the sender address. This is wrong, because when routing to
3956 send a bounce to the sender, it would be empty. Therefore, I have changed
3957 it so that, while verifying a sender address, $sender_address is set to <>.
3958 (There is no change to what happens when verifying a recipient address.)
3960 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3961 target A or AAAA records (if not already returned) without resetting the
3962 qualify_single or search_parents options of the DNS resolver. These are
3963 inappropriate in this case because the targets of MX and SRV records must
3964 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3965 target that, when qualified, matched something in the local domain. These
3966 two options are now turned off when doing these lookups.
3968 57. It seems that at least some releases of Reiserfs (which does not have the
3969 concept of a fixed number of inodes) returns zero and not -1 for the
3970 number of available inodes. This interacted badly with check_spool_inodes,
3971 which assumed that -1 was the "no such thing" setting. What I have done is
3972 to check that the total number of inodes is greater than zero before doing
3973 the test of how many are available.
3975 58. When a "warn" ACL statement has a log_message modifier, the message is
3976 remembered, and not repeated. This is to avoid a lot of repetition when a
3977 message has many recipients that cause the same warning to be written.
3978 Howewer, Exim was preserving the list of already written lines for an
3979 entire SMTP session, which doesn't seem right. The memory is now reset if a
3980 new message is started.
3982 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3983 debugging output unless log_rewrite was also set.
3985 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3986 of (int)(handle) when we know that handle contains (void *)(-1).
3988 61. The Exim daemon panic-logs an error return when it closes the incoming
3989 connection. However "connection reset by peer" seems to be common, and
3990 isn't really an error worthy of noting specially, so that particular error
3993 62. When Exim is trying to find all the local interfaces, it used to panic and
3994 die if the ioctl to get the interface flags failed. However, it seems that
3995 on at least one OS (Solaris 9) it is possible to have an interface that is
3996 included in the list of interfaces, but for which you get a failure error
3997 for this call. This happens when the interface is not "plumbed" into a
3998 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3999 failure of the "get flags" call assumes that the interface is down.
4001 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4002 makes life easier for people who are doing arithmetic on fields extracted
4003 from dates, where you often get leading zeros that should not be
4004 interpreted as octal.
4006 64. Added qualify_domain to the redirect router, to override the global
4009 65. If a pathologically long header line contained very many addresses (the
4010 report of this problem mentioned 10 000) and each of them was rewritten,
4011 Exim could use up a very large amount of memory. (It kept on making new
4012 copies of the header line as it rewrote, and never released the old ones.)
4013 At the expense of a bit more processing, the header rewriting function has
4014 been changed so that it no longer eats memory in this way.
4016 66. The generation of the Received: header has been moved from the time that a
4017 message starts to be received, to the time that it finishes. The timestamp
4018 in the Received: header should now be very close to that of the <= log
4019 line. There are two side-effects of this change:
4021 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4022 logged header lines no longer include the local Received: line, because
4023 it has not yet been created. The same applies to a copy of the message
4024 that is returned to a non-SMTP sender when a message is rejected.
4026 (b) When a filter file is tested using -bf, no additional Received: header
4027 is added to the test message. After some thought, I decided that this
4030 This change does not affect the value of $received_for. It is still set
4031 after address rewriting, but before local_scan() is called.
4033 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4035 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4036 gave an unhelpful panic error message, and a defer error. I have managed to
4037 change this behaviour so that it now rejects any supplied certificate,
4038 which seems right, as the list of acceptable certificates is empty.
4040 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4041 gave an unhelpful defer error. I have not managed to make this reject any
4042 supplied certificates, but the error message it gives is "no certificate
4043 supplied", which is not helpful.
4045 70. exigrep's output now also includes lines that are not associated with any
4046 message, but which match the given pattern. Implemented by a patch from
4047 Martin Sluka, which also tidied up the Perl a bit.
4049 71. Recipient callout verification, like sender verification, was using <> in
4050 the MAIL FROM command. This isn't really the right thing, since the actual
4051 sender may affect whether the remote host accepts the recipient or not. I
4052 have changed it to use the actual sender in the callout; this means that
4053 the cache record is now keyed on a recipient/sender pair, not just the
4054 recipient address. There doesn't seem to be a real danger of callout loops,
4055 since a callout by the remote host to check the sender would use <>.
4056 [SEE ABOVE: changed after hitting problems.]
4058 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4059 temporary errors. However, in the case of such a code being given after
4060 the end of a data transmission (i.e. after ".") Exim was failing to write
4061 a retry record for the message. (Yes, there was some broken host that was
4062 actually sending 8xx at this point.)
4064 73. An unknown lookup type in a host list could cause Exim to panic-die when
4065 the list was checked. (An example that provoked this was putting <; in the
4066 middle of a list instead of at the start.) If this happened during a DATA
4067 ACL check, a -D file could be left lying around. This kind of configuration
4068 error no longer causes Exim to die; instead it causes a defer errror. The
4069 incident is still logged to the main and panic logs.
4071 74. Buglet left over from Exim 3 conversion. The message "too many messages
4072 in one connection" was written to the rejectlog but not the mainlog, except
4073 when address rewriting (yes!) was being logged.
4075 75. Added write_rejectlog option.
4077 76. When a system filter was run not as root (that is, when system_filter_user
4078 was set), the values of the $n variables were not being returned to the
4079 main process; thus, they were not subsequently available in the $sn
4082 77. Added +return_path_on_delivery log selector.
4084 78. A connection timeout was being treated differently from recipients deferred
4085 when testing hosts_max_try with a message that was older than the host's
4086 retry timeout. (The host should not be counted, thus allowing all hosts to
4087 be tried at least once before bouncing.) This may have been the cause of an
4088 occasionally reported bug whereby a message would remain on the queue
4089 longer than the retry timeout, but would be bounced if a delivery was
4090 forced. I say "may" because I never totally pinned down the problem;
4091 setting up timeout/retry tests is difficult. See also the next item.
4093 79. The ultimate address timeout was not being applied to errors that involved
4094 a combination of host plus message (for example, a timeout on a MAIL
4095 command). When an address resolved to a number of possible hosts, and they
4096 were not all tried for each delivery (e.g. because of hosts_max_try), a
4097 message could remain on the queue longer than the retry timeout.
4099 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4102 81. Fixed an obscure SMTP outgoing bug which required at least the following
4103 conditions: (a) there was another message waiting for the same server;
4104 (b) the server returned 5xx to all RCPT commands in the first message so
4105 that the message was not completed; (c) the server dropped the connection
4106 or gave a negative response to the RSET that Exim sends to abort the
4107 transaction. The observed case was a dropped connection after DATA that had
4108 been sent in pipelining mode. That is, the server had advertised PIPELINING
4109 but was not implementing it correctly. The effect of the bug was incorrect
4110 behaviour, such as trying another host, and this could lead to a crash.
4116 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4117 and daemon.c were passed as pointers to ints; they should have been
4118 pointers to socklen_t variables (which are typically unsigned ints).
4120 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4123 3. Fixed a really odd bug that affected only the testing scheme; patching a
4124 certain fixed string in the binary changed the value of another string that
4125 happened to be identical to the end of the original first string.
4127 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4128 name", it returns that address as the IP address. On some operating
4129 systems (e.g. Solaris), it also passes back the IP address string as the
4130 "host name". However, on others (e.g. Linux), it passes back an empty
4131 string. Exim wasn't checking for this, and was changing the host name to an
4132 empty string, assuming it had been canonicized.
4134 5. Although rare, it is permitted to have more than one PTR record for a given
4135 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4136 all the names associated with an address, because they do in Solaris.
4137 However, it seems that they do not in Linux for data that comes from the
4138 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4139 I found this out when I moved to a new Linux workstation and tried to run
4140 the Exim test suite.
4142 To get round this problem I have changed the code so that it now does its
4143 own call to the DNS to look up PTR records when searching for a host name.
4144 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4145 addresses that are only in /etc/hosts are still found.
4147 This behaviour is, however, controlled by an option called host_lookup_
4148 order, which defaults to "bydns:byaddr". If people want to use the other
4149 order, or indeed, just use one or the other means of lookup, they can
4150 specify it in this variable.
4152 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4153 some operating systems, this comes back from gethostbyaddr() as an empty
4154 string, and this is what Exim used to test for. However, it seems that in
4155 other systems, "." is yielded. Exim now tests for this case too.
4157 7. The values of check_spool_space and check_log_space are now held internally
4158 as a number of kilobytes instead of an absolute number of bytes. If a
4159 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4160 kilobyte. This means that much larger values can be stored.
4162 8. Exim monitor: an attempt to get the action menu when not actually pointing
4163 at a message produces an empty menu entitled "No message selected". This
4164 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4165 no entries in it ("Shell widget menu has zero width and/or height"). So I
4166 have added a single, blank menu entry in this case.
4168 9. Added ${quote_local_part.
4170 10. MIME decoding is now applied to the contents of Subject: header lines when
4173 11. Now that a reference to $sender_host_address automatically causes a reverse
4174 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4175 host lookup before query-style lookups in lists that might use this
4176 variable. This has therefore been abolished, and the "net-" prefix is no
4177 longer necessary for query-style lookups.
4179 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4180 have been a typo for LFLAGS, so it has been changed.
4182 13. The install script calls Exim with "-C /dev/null" in order to find the
4183 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4184 to be output. Howeve, since Exim outputs its version number before the
4185 error, it didn't break the script. It just looked ugly. I fixed this by
4186 always allowing "-C /dev/null" if the caller is root.
4188 14. Ignore overlarge ACL variable number when reading spool file - insurance
4189 against a later release with more variables having written the file.
4191 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4192 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4193 this, as well as the form without the "IPv6" on the front.
4195 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4196 OS/Makefile-Darwin file.
4198 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4199 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4201 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4202 variable. However, some OS use ints for inodes. I've added cast to long int
4203 to get rid of the compiler warning.
4205 19. I had forgotten to lock out "/../" in configuration file names when
4206 ALT_CONFIG_PREFIX was set.
4208 20. Routers used for verification do not need to specify transports. However,
4209 if such a router generated a host list, and callout was configured, Exim
4210 crashed, because it could not find a port number from the (non-existent)
4211 transport. It now assumes port 25 in this circumstance.
4213 21. Added the -t option to exigrep.
4215 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4216 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4217 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4218 them is set, LOOKUP_LSEARCH is forced.
4220 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4222 24. Added sender and host information to the "rejected by local_scan()" log
4223 line; previously there was no indication of these.
4225 25. Added .include_if_exists.
4227 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4228 Linux. It turns out that not all file systems support this. Apparently some
4229 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4230 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4231 not supported on the file descriptor, is now ignored when Exim is trying to
4232 sync a directory. This applies only to Linux.
4234 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4236 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4237 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4240 29. Added support for maildirsize files from supplied patch (modified a bit).
4242 30. The use of :fail: followed by an empty string could lead Exim to respond to
4243 sender verification failures with (e.g.):
4245 550 Verification failed for <xxx>
4246 550 Sender verify failed
4248 where the first response line was missing the '-' that indicates it is not
4249 the final line of the response.
4251 31. The loop for finding the name of the user that called Exim had a hardwired
4252 limit of 10; it now uses the value of finduser_retries, which is used for
4253 all other user lookups.
4255 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4258 33. Exim was neglecting to zero errno before one call of strtol() when
4259 expanding a string and expecting an integer value. On some systems this
4260 resulted in spurious "integer overflow" errors. Also, it was casting the
4261 result into an int without checking.
4263 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4264 did not work. The code looks as if it has *never* worked, though it appears
4265 to have been documented since at least releast 1.62. I have made it work.
4267 35. The "timeout_DNS" error in retry rules, also documented since at least
4268 1.62, also never worked. As it isn't clear exactly what this means, and
4269 clearly it isn't a major issue, I have abolished the feature by treating it
4270 as "timeout", and writing a warning to the main and panic logs.
4272 36. The display of retry rules for -brt wasn't always showing the error code
4275 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4276 timeout_connect_A, timeout_connect_MX.
4278 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4279 to the empty sender.
4281 39. The daemon was not analysing the content of -oX till after it had closed
4282 stderr and disconnected from the controlling terminal. This meant that any
4283 syntax errors were only noted on the panic log, and the return code from
4284 the command was 0. By re-arranging the code a little, I've made the
4285 decoding happen first, so such errors now appear on stderr, and the return
4286 code is 1. However, the actual setting up of the sockets still happens in
4287 the disconnected process, so errors there are still only recorded on the
4290 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4291 connections (as happens on some IP stacks) was logged at start up time as
4292 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4293 it from "IPv6 and IPv4", which means that two separate sockets are being
4296 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4297 says whether AF_INET or AF_INET6 was passed as an argument.
4299 42. Exiwhat output was messed up when time zones were included in log
4302 43. Exiwhat now gives more information about the daemon's listening ports,
4303 and whether -tls-on-connect was used.
4305 44. The "port" option of the smtp transport is now expanded.
4307 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4308 silently ignored. Now an error message is written to the main and panic
4311 46. There's a new ACL modifier called "logwrite" which writes to a log file
4312 as soon as it is encountered.
4314 47. Added $local_user_uid and $local_user_gid at routing time.
4316 48. Exim crashed when trying to verify a sender address that was being
4319 49. Exim was recognizing only a space character after ".include". It now also
4320 recognizes a tab character.
4322 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4323 extracting the relevant information from the specification. The man page no
4324 longer contains scrambled data for the -d option, and I've added a section
4325 at the front about calling Exim under different names.
4327 51. Added "extra_headers" argument to the "mail" command in filter files.
4329 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4332 53. Installed eximstats 1.29.
4334 54. Added transport_filter_timeout as a generic transport option.
4336 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4337 Cc: header lines. This was required by RFC 822, but it not required by RFC
4340 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4341 incoming messages that did not have them. Now it does so only if the
4342 message originates locally, that is, if there is no associated remote host
4343 address. When Resent- header lines are present, this applies to the Resent-
4344 lines rather than the non-Resent- lines.
4346 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4347 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4349 58. Messages for configuration errors now include the name of the main
4350 configuration file - useful now that there may be more than one file in a
4351 list (.included file names were always shown).
4353 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4354 for those rare installations that do not start the daemon as root or run it
4355 setuid root. I've cut out the call to initgroups() if the daemon is not
4358 60. The Exim user and group can now be bound into the binary as text strings
4359 that are looked up at the start of Exim's processing.
4361 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4363 62. Added $mailstore_basename variable.
4365 63. Installed patch to sieve.c from Michael Haardt.
4367 64. When Exim failed to open the panic log after failing to open the main log,
4368 the original message it was trying to log was written to stderr and debug
4369 output, but if they were not available (the usual case in production), it
4370 was lost. Now it is written to syslog before the two lines that record the
4371 failures to open the logs.
4373 65. Users' Exim filters run in subprocesses under the user's uid. It is
4374 possible for a "deliver" command or an alias in a "personal" command to
4375 provoke an address rewrite. If logging of address rewriting is configured,
4376 this fails because the process is not running as root or exim. There may be
4377 a better way of dealing with this, but for the moment (because 4.30 needs
4378 to be released), I have disabled address rewrite logging when running a
4379 filter in a non-root, non-exim process.
4385 1. The buildconfig auxiliary program wasn't quoting the value set for
4386 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4387 not defined. This bug was masked in 4.22 by the effect that was fixed in
4390 2. Some messages that were rejected after a message id was allocated were
4391 shown as "incomplete" by exigrep. It no longer does this for messages that
4392 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4394 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4395 have allow_domain_literals set, the ID did not get logged in the <= line.
4396 Domain literals are now always recognized in Message-ID: header lines.
4398 4. The first argument for a ${extract expansion item is the key name or field
4399 number. Leading and trailing spaces in this item were not being ignored,
4400 causing some misleading effects.
4402 5. When deliver_drop_privilege was set, single queue runner processes started
4403 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4404 same command in the process it spins off) were not dropping privilege.
4406 6. When the daemon running as "exim" started a queue runner, it always
4407 re-executed Exim in the spun-off process. This is a waste of effort when
4408 deliver_drop_privilege is set. The new process now just calls the
4409 queue-runner function directly.
4415 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4418 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4419 ignored. Though the use of -oP was forcing the writing of a pid file, it
4420 was always written to the default place.
4422 3. If the message "no IP address found for host xxxx" is generated during
4423 incoming verification, it is now followed by identification of the incoming
4424 connection (so you can more easily find what provoked it).
4426 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4428 5. Added some features to "harden" Exim a bit more against certain attacks:
4430 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4431 be put in Local/Makefile. This is like the never_users runtime option,
4432 but it cannot be overridden. The default setting is "root".
4434 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4435 prefix string with which any file named in a -C command line option
4438 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4439 is retained for -C and -D only if the caller of Exim is root. Without
4440 it, the exim user may also use -C and -D and retain privilege.
4442 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4443 command line option is disabled.
4445 6. Macro names set by the -D option must start with an upper case letter, just
4446 like macro names defined in the configuration file.
4448 7. Added "dereference=" facility to LDAP.
4450 8. Two instances of the typo "uknown" in the source files are fixed.
4452 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4453 the Configure-Makefile script screwed up while processing it.
4455 10. Incorporated PCRE 4.4.
4457 11. The SMTP synchronization check was not operating right at the start of an
4458 SMTP session. For example, it could not catch a HELO sent before the client
4459 waited for the greeting. There is now a check for outstanding input at the
4460 point when the greeting is written. Because of the duplex, asynchronous
4461 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4462 way, but not yet received, when the check is performed.
4464 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4465 on TCP/IP sockets, because this apparently causes some broken clients to
4468 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4469 unchanged) from the Cygwin maintainer.
4471 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4472 was supported instead of testing for mbx. Effectively a typo.
4474 15. The spa authenticator server code was not checking that the input it
4475 received was valid base64.
4477 16. The debug output line for the "set" modifier in ACLs was not showing the
4478 name of the variable that was being set.
4480 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4482 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4483 lookup on its own. Something else was needed to trigger the lookup. For
4484 example, a match in host_lookup or the need for a host name in a host list.
4485 Now, if $sender_host_name is referenced and the host name has not yet been
4486 looked up, a lookup is performed. If the lookup fails, the variable remains
4487 empty, and $host_lookup_failed is set to "1".
4489 19. Added "eqi" as a case-independent comparison operator.
4491 20. The saslauthd authentication condition could segfault if neither service
4492 nor realm was specified.
4494 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4495 error message that was logged was misleading, and incoming SMTP
4496 connections were dropped. The message is now more accurate, and temporary
4497 errors are given to SMTP connections.
4499 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4500 (except RSET) with a 421 error, until QUIT is received. However, it was
4501 failing to send a response to QUIT.
4503 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4504 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4505 ACL is now run after the helo_try_verify_hosts code.
4507 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4508 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4509 case-independent, so other case variants are also recognized). Apparently
4510 some systems use these upper case variants.
4512 25. If more than two messages were waiting for the same host, and a transport
4513 filter was specified for the transport, Exim sent two messages over the
4514 same TCP/IP connection, and then failed with "socket operation on non-
4515 socket" when it tried to send the third.
4517 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4519 27. The extern definition of crypt16() in expand.c was not being excluded when
4520 the OS had its own crypt16() function.
4522 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4523 as a preferred synonym for return_size_limit, both as an option and as an
4526 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4528 30. Changed the default configuration ACL to relax the local part checking rule
4529 for addresses that are not in any local domains. For these addresses,
4530 slashes and pipe symbols are allowed within local parts, but the sequence
4531 /../ is explicitly forbidden.
4533 31. SPA server authentication was not clearing the challenge buffer before
4536 32. log_message in a "warn" ACL statement was writing to the reject log as
4537 well as to the main log, which contradicts the documentation and doesn't
4538 seem right (because no rejection is happening). So I have stopped it.
4540 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4541 However, I am unable to do any testing of this.
4543 34. Fixed an infelicity in the appendfile transport. When checking directories
4544 for a mailbox, to see if any needed to be created, it was accidentally
4545 using path names with one or more superfluous leading slashes; tracing
4546 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4548 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4549 contents are added to the log line that is written for every discarded
4550 recipient. (Previously a log_message setting was ignored.)
4552 36. The ${quote: operator now quotes the string if it is empty.
4554 37. The install script runs exim in order to find its version number. If for
4555 some reason other than non-existence or emptiness, which it checks, it
4556 could not run './exim', it was installing it with an empty version number,
4557 i.e. as "exim-". This error state is now caught, and the installation is
4560 38. An argument was missing from the function that creates an error message
4561 when Exim fails to connect to the socket for saslauthd authentication.
4562 This could cause Exim to crash, or give a corrupted message.
4564 39. Added isip, isip4, and isip6 to ${if conditions.
4566 40. The ACL variables $acl_xx are now saved with the message, and can be
4567 accessed later in routers, transports, and filters.
4569 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4570 strings in the file are not string-expanded.
4572 42. If a MAIL command specified a SIZE value that was too large to fit into an
4573 int variable, the check against message_size_limit failed. Such values are
4574 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4575 day this will have to be increased, but I don't think I want to be around
4576 when emails are that large.
4583 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4584 iconv() is not standard in FreeBSD.
4586 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4587 IPv6 enabled. The observed symptom was a segmentation fault on return from
4588 the function os_common_find_running_interfaces() in src/os.c.
4590 3. In the check_special_case() function in daemon.c I had used "errno" as an
4591 argument name, which causes warnings on some systems. This was basically a
4592 typo, since it was named "eno" in the comments!
4594 4. The code that waits for the clock to tick (at a resolution of some fraction
4595 of a second) so as to ensure message-id uniqueness was always waiting for
4596 at least one whole tick, when it could have waited for less. [This is
4597 almost certainly not relevant at current processor speeds, where it is
4598 unlikely to ever wait at all. But we try to future-proof.]
4600 5. The function that sleeps for a time interval that includes fractions of a
4601 second contained a race. It did not block SIGALRM between setting the
4602 timer, and suspending (a couple of lines later). If the interval was short
4603 and the sigsuspend() was delayed until after it had expired, the suspension
4604 never ended. On busy systems this could lead to processes getting stuck for
4607 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4608 process, before it forks any delivery processes. The open lookup caching
4609 mechanism meant that the open file or database connection was passed into
4610 the delivery process. The problem was that delivery processes always tidy
4611 up cached lookup data. This could cause a problem for the next delivery
4612 process started by the queue runner, because the external queue runner
4613 process does not know about the closure. So the next delivery process
4614 still has data in the lookup cache. In the case of a file lookup, there was
4615 no problem because closing a file descriptor in a subprocess doesn't affect
4616 the parent. However, if the lookup was caching a connection to a database,
4617 the connection was closed, and the second delivery process was likely to
4618 see errors such as "PGSQL: query failed: server closed the connection
4619 unexpectedly". The problem has been fixed by closing all cached lookups
4620 in a queue runner before running a delivery process.
4622 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4623 seem to have the "const" qualifier which it has on other OS. I've
4626 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4627 *of the same type* (client or server) with the same public name that an
4628 error should be diagnosed.
4630 9. When Exim looked up a host name for an IP address, but failed to find the
4631 original IP address when looking up the host name (a safety check), it
4632 output the message "<ip address> does not match any IP for NULL", which was
4633 confusing, to say the least. The bug was that the host name should have
4634 appeared instead of "NULL".
4636 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4637 user that is built into the binary, and the -C or -D options is used, root
4638 privilege is dropped before the configuration file is read. In addition,
4639 logging is switched to stderr instead of the normal log files. If the
4640 configuration then re-defines the Exim user, the unprivileged environment
4641 is probably not what is expected, so Exim logs a panic warning message (but
4644 However, if deliver_drop_privilege is set, the unprivileged state may well
4645 be exactly what is intended, so the warning has been cut out in that case,
4646 and Exim is allowed to try to write to its normal log files.
4652 1. smtp_return_error_details was not giving details for temporary sender
4653 or receiver verification errors.
4655 2. Diagnose a configuration error if two authenticators have the same public
4658 3. Exim used not to create the message log file for a message until the first
4659 delivery attempt. This could be confusing when incoming messages were held
4660 for policy or load reasons. The message log file is now created at the time
4661 the message is received, and an initial "Received" line is written to it.
4663 4. The automatically generated man page for command line options had a minor
4664 bug that caused no ill effects; however, a more serious problem was that
4665 the procedure for building the man page automatically didn't always
4666 operate. Consequently, release 4.20 contains an out-of-date version. This
4667 shouldn't happen again.
4669 5. When building Exim with embedded Perl support, the script that builds the
4670 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4671 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4673 6. The freeze_tell option was not being used for messages that were frozen on
4674 arrival, either by an ACL or by local_scan().
4676 7. Added the smtp_incomplete_transaction log selector.
4678 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4679 was accepting AUTH without a new EHLO.
4681 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4682 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4685 10. Logging of TCP/IP connections (when configured) now happens in the main
4686 daemon process instead of the child process, so that the TCP/IP connection
4687 count is more accurate (but it can never be perfect).
4689 11. The use of "drop" in a nested ACL was not being handled correctly in the
4690 outer ACL. Now, if condition failure induced by the nested "drop" causes
4691 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4692 or "require"), the connection is dropped.
4694 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4695 that yield "discard" can now be used with an "accept" or a "discard" verb,
4696 but an error is generated for any others (because I can't see a useful way
4697 to define what should happen).
4699 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4700 are now processed in the same way as lines in the Exim configuration file.
4701 In particular, continuation lines are supported.
4703 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4705 15. Added -ti meaning -t -i.
4707 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4708 domains, and warn by logging if others are found.
4710 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4711 returned from GIFCONF when Exim is trying to find the list of interfaces on
4712 a host. The code in os.c has been modified to copy each ifreq to an aligned
4713 structure in all cases.
4715 Also, in some cases, the returned ifreq's were being copied to a 'struct
4716 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4717 means the last couple of bytes of an IPv6 address could be chopped if the
4718 ifreq contained only a normal sockaddr (14 bytes storage).
4720 18. Named domain lists were not supported in the hosts_treat_as_local option.
4721 An entry such as +xxxx was not recognized, and was treated as a literal
4724 19. Ensure that header lines added by a DATA ACL are included in the reject log
4725 if the ACL subsequently rejects the message.
4727 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4728 MD5 (which is deprecated).
4730 21. When testing a filter file using -bf, Exim was writing a message when it
4731 took the sender from a "From " line in the message, but it was not doing so
4732 when it took $return_path from a Return-Path: header line. It now does.
4734 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4735 with a valid header line field name (a series of printing characters
4736 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4738 23. Changed "disc" in the source to "disk" to conform to the documentation and
4739 the book and for uniformity.
4741 24. Ignore Sendmail's -Ooption=value command line item.
4743 25. When execve() failed while trying to run a command in a pipe transport,
4744 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4745 could be confused with a return value of 69 from the command itself. This
4746 has been changed to 127, the value the shell returns if it is asked to run
4747 a non-existent command. The wording for the related log line suggests a
4748 non-existent command as the problem.
4750 26. If received_header_text expands to an empty string, do not add a Received:
4751 header line to the message. (Well, it adds a token one on the spool, but
4752 marks it "old" so that it doesn't get used or transmitted.)
4754 27. Installed eximstats 1.28 (addition of -nt option).
4756 28. There was no check for failure on the call to getsockname() in the daemon
4757 code. This can fail if there is a shortage of resources on the system, with
4758 ENOMEM, for example. A temporary error is now given on failure.
4760 29. Contrary to the C standard, it seems that in some environments, the
4761 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4762 program. Exim now does this explicitly; it affects the formatting of
4763 timestamps using strftime().
4765 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4766 complaints. I've now initialized all the variables, to avoid this.
4768 32. Header lines added by a system filter were not being "seen" during
4769 transport-time rewrites.
4771 33. The info_callback() function passed to OpenSSL is set up with type void
4772 (*)(SSL *, int, int), as described somewhere. However, when calling the
4773 function (actually a macro) that sets it up, the type void(*)() is
4774 expected. I've put in a cast to prevent warnings from picky compilers.
4776 34. If a DNS black list lookup found a CNAME record, but there were no A
4777 records associated with the domain it pointed at, Exim crashed.
4779 35. If a DNS black list lookup returned more than one A record, Exim ignored
4780 all but the first. It now scans all returned addresses if a particular IP
4781 value is being sought. In this situation, the contents of the
4782 $dnslist_value variable are a list of all the addresses, separated by a
4785 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4786 to accept a host name and all its aliases if the forward lookup for any of
4787 them yielded the IP address of the incoming connection. Now it accepts only
4788 those names whose forward lookup yields the correct IP address. Any other
4789 names are discarded. This closes a loophole whereby a rogue DNS
4790 administrator could create reverse DNS records to break through a
4791 wildcarded host restriction in an ACL.
4793 37. If a user filter or a system filter that ran in a subprocess used any of
4794 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4795 the wrong values were passed to the pipe command ($thisaddress had the
4796 value of $0, $0 had the value of $1, etc). This bug was introduced by
4797 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4799 38. Improved the line breaking for long SMTP error messages from ACLs.
4800 Previously, if there was no break point between 40 and 75 characters, Exim
4801 left the rest of the message alone. Two changes have been made: (a) I've
4802 reduced the minimum length to 35 characters; (b) if it can't find a break
4803 point between 35 and 75 characters, it looks ahead and uses the first one
4804 that it finds. This may give the occasional overlong line, but at least the
4805 remaining text gets split now.
4807 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4808 file descriptors might be low, and that setting 1000 would always raise it.
4809 It turns out that in some environments, the limit is already over 1000 and
4810 that lowering it causes trouble. So now Exim takes care not to decrease it.
4812 40. When delivering a message, the value of $return_path is set to $sender_
4813 address at the start of routing (routers may change the value). By an
4814 oversight, this default was not being set up when an address was tested by
4815 -bt or -bv, which affected the outcome if any router or filter referred to
4818 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4819 log only when "message" or "log_message" are set. However, if one of the
4820 conditions was an address verification, or a call to a nested ACL, the
4821 messages generated by the underlying test were being passed through. This
4822 no longer happens. The underlying message is available in $acl_verify_
4823 message for both "message" and "log_message" expansions, so it can be
4824 passed through if needed.
4826 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4827 new expansion $bh_ to give the encoded byte string without charset
4828 translation. Translation happens only if iconv() is available; HAVE_ICONV
4829 indicates this at build time. HEADERS_CHARSET gives the charset to
4830 translate to; headers_charset can change it in the configuration, and
4831 "headers charset" can change it in an individual filter file.
4833 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4834 that creates RFC 2047 encoded "words" labels them as that charset instead
4835 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4836 expansion operator; (ii) when Exim creates a From: line for a local
4837 message; (iii) when a header line is rewritten to include a "phrase" part.
4839 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4840 buggy, causing it to skip the first lines of messages whose message ID
4841 ended in 'D'. This would not have bitten before Exim release 4.14, because
4842 message IDs were unlikely to end in 'D' before then. The effect was to have
4843 incorrect size information for certain domains.
4845 45. #include "config.h" was missing at the start of the crypt16.c module. This
4846 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4849 46. If there was a timeout during a "random" callout check, Exim treated it as
4850 a failure of the random address, and carried on sending RSET and the real
4851 address. If the delay was just some slowness somewhere, the response to the
4852 original RCPT would be taken as a response to RSET and so on, causing
4853 mayhem of various kinds.
4855 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4856 when I implemented it. It didn't allow for the fact that some option values
4857 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4858 the right test for positive values.
4860 48. Domain names in DNS records are case-independent. Exim always looks them up
4861 in lower case. Some resolvers return domain names in exactly the case they
4862 appear in the zone file, that is, they may contain uppercase letters. Not
4863 all resolvers do this - some return always lower case. Exim was treating a
4864 change of case by a resolver as a change of domain, similar to a widening
4865 of a domain abbreviation. This triggered its re-routing code and so it was
4866 trying to route what was effectively the same domain again. This normally
4867 caused routing to fail (because the router wouldn't handle the domain
4868 twice). Now Exim checks for this case specially, and just changes the
4869 casing of the domain that it ultimately uses when it transmits the message
4872 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4875 50. If a filter generated a file delivery with a non-absolute name (possible if
4876 no home directory exists for the router), the forbid_file option was not
4879 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4880 the existing equality matching.
4882 52. Exim was using ints instead of ino_t variables in some places where it was
4883 dealing with inode numbers.
4885 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4886 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4887 called TMPDIR, and if it finds it is different, it changes its value.
4889 54. The smtp_printf() function is now made available to local_scan() so
4890 additional output lines can be written before returning. There is also an
4891 smtp_fflush() function to enable the detection of a dropped connection.
4892 The variables smtp_input and smtp_batched_input are exported to
4895 55. Changed the default runtime configuration: the message "Unknown user"
4896 has been removed from the ACL, and instead placed on the localuser router,
4897 using the cannot_route_message feature. This means that any verification
4898 failures that generate their own messages won't get overridden. Similarly,
4899 the "Unrouteable address" message that was in the ACL for unverifiable
4900 relay addresses has also been removed.
4902 56. Added hosts_avoid_esmtp to the smtp transport.
4904 57. The exicyclog script was not checking for the esoteric option
4905 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4906 will work only if exicyclog is run under the appropriate euid.
4908 58. Following a discussion on the list, the rules by which Exim recognises line
4909 endings on incoming messages have been changed. The -dropcr and drop_cr
4910 options are now no-ops, retained only for backwards compatibility. The
4911 following line terminators are recognized: LF CRLF CR. However, special
4912 processing applies to CR:
4914 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4915 nor a local message in the state where . is a terminator.
4917 (ii) If a bare CR is encountered in a header line, an extra space is added
4918 after the line terminator so as not to end the header. The reasoning
4919 behind this is that bare CRs in header lines are most likely either
4920 to be mistakes, or people trying to play silly games.
4922 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4923 was being incorrectly given as 18 bytes larger than it should have been.
4924 This is a VOB (very old bug).
4926 60. This may never have affected anything current, but just in case it has:
4927 When the local host is found other than at the start of a list of hosts,
4928 the local host, those with the same MX, and any that follow, are discarded.
4929 When the list in question was part of a longer list of hosts, the following
4930 hosts (not currently being processed) were also being discarded. This no
4931 longer happens. I'm not sure if this situation could ever has previously
4934 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4937 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4938 header. This is something that is recommended in a new Internet Draft, and
4939 is something that is documented as being done by Sendmail. There are two
4940 possible values. For messages generated by the autoreply transport, Exim
4943 Auto-Submitted: auto-replied
4945 whereas for all other generated messages (e.g. bounces) it adds
4947 Auto-Submitted: auto-generated
4949 63. The "personal" condition in filters now includes a test for the
4950 Auto-Submitted: header. If it contains the string "auto-" the message it
4951 not considered personal.
4953 64. Added rcpt_include_affixes as a generic transport option.
4955 65. Added queue_only_override (default true).
4957 66. Added the syslog_duplication option.
4959 67. If what should have been the first header line of a message consisted of
4960 a space followed by a colon, Exim was mis-interpreting it as a header line.
4961 It isn't of course - it is syntactically invalid and should therefore be
4962 treated as the start of the message body. The misbehaviour could have
4963 caused a number of strange effects, including loss of data in subsequent
4964 header lines, and spool format errors.
4966 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4967 client host had authenticated. This control can now be exercised by an ACL
4968 for more flexibility.
4970 69. By default, callouts do not happen when testing with -bh. There is now a
4971 variant, -bhc, which does actually run the callout code, including
4972 consulting and updating the callout cache.
4974 70. Added support for saslauthd authentication, courtesy of Alexander
4977 71. If statvfs() failed on the spool or log directories while checking their
4978 size for availability, Exim confusingly gave the error "space shortage".
4979 Furthermore, in debugging mode it crashed with a floating point exception.
4980 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4981 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4982 serious problem, Exim now writes to the main and panic logs when this
4983 happens, with details of the failure. It then refuses to accept the
4984 incoming message, giving the message "spool directory problem" or "log
4985 directory problem" with a 421 code for SMTP messages.
4987 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4988 0, 1, and 2 exist, because some OS complain for execs without them (see
4989 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4990 descriptors. However, the code omitted to check that the open succeeded,
4991 causing mysterious errors if for some reason the permissions on /dev/null
4992 got screwed. Now Exim writes a message to the main and panic logs, and
4993 bombs out if it can't open /dev/null.
4995 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4996 interact so that it is all more flexible. It is supposed to remain
4997 backwards compatible. Also added extra_local_interfaces.
4999 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5000 to bomb out with an assertion failure - to the client this appears as a
5001 connection drop. This problem occurs in the part of the code that was taken
5002 from the Samba project. Fortunately, the assertion is in a very simple
5003 function, so I have fixed this by reproducing the function inline in the
5004 one place where it is called, and arranging for authentication to fail
5005 instead of killing the process with assert().
5007 75. The SPA client code was not working when the server requested OEM rather
5008 than Unicode encoding.
5010 76. Added code to make require_files with a specific uid setting more usable in
5011 the case where statting the file as root fails - usually a non-root-mounted
5012 NFS file system. When this happens and the failure is EACCES, Exim now
5013 forks a subprocess and does the per-uid checking as the relevant uid.
5015 77. Added process_log_path.
5017 78. If log_file_path was not explicitly set, a setting of check_log_space or
5018 check_log_inodes was ignored.
5020 79. If a space check for the spool or log partitions fails, the incident is now
5021 logged. Of course, in the latter case the data may get lost...
5023 80. Added the %p formatting code to string_format() so that it can be used to
5024 print addresses in debug_print(). Adjusted all the address printing in the
5025 debugging in store.c to use %p rather than %d.
5027 81. There was a concern that a line of code in smtp_in.c could overflow a
5028 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5029 initially expressed, the concern was not well-founded, because trailing
5030 spaces are removed early. However, if the trailing spaces were followed by
5031 a NULL, they did not get removed, so the overflow was possible. Two fixes
5034 (a) I re-wrote the offending code in a cleaner fashion.
5035 (b) If an incoming SMTP command contains a NULL character, it is rejected
5038 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5039 runs initgroups(), so that if the Exim user is in any additional groups,
5040 they will be used during message reception.
5046 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob