1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.609 2010/05/29 17:09:09 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
11 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
13 NM/01 Bugzilla 965: Support mysql stored procedures.
14 Patch from Alain Williams
16 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
18 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
19 Patch from Andreas Metzler
21 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
22 Patch from Kirill Miazine
24 NM/05 Bugzilla 671: Added umask to procmail example.
26 JJ/03 installed exipick 20100323.0, fixing doc bug
28 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
29 directory. Notification and patch from Dan Rosenberg
31 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
33 TK/02 Improve log output when DKIM signing operation fails.
35 MH/01 Treat the transport option dkim_domain as a colon separated
36 list, not as a single string, and sign the message with each element,
37 omitting multiple occurences of the same signer.
44 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
46 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
48 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
50 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
52 NM/04 Bugzilla 915: Flag broken perl installation during build.
58 TK/01 Added patch by Johannes Berg that expands the main option
59 "spamd_address" if it starts with a dollar sign.
61 TK/02 Write list of recipients to X-Envelope-Sender header when building
62 the mbox-format spool file for content scanning (suggested by Jakob
65 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
66 (http://www.dcc-servers.net/) support via dccifd. Activated by
67 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
69 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
70 by Mark Daniel Reidel <mr@df.eu>.
72 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
73 When building exim an external PCRE library is now needed -
74 PCRE is a system library on the majority of modern systems.
75 See entry on PCRE_LIBS in EDITME file.
77 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
78 conversation. Added nologin parameter to request.
79 Patch contributed by Kirill Miazine
81 TF/01 Do not log submission mode rewrites if they do not change the address.
83 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
85 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
86 log files in place. Contributed by Roberto Lima
88 NM/04 Bugzilla 667: close socket used by dovecot authenticator
90 TF/03 Bugzilla 615: When checking the local_parts router precondition
91 after a local_part_suffix or local_part_prefix option, Exim now
92 does not use the address's named list lookup cache, since this
93 contains cached lookups for the whole local part.
95 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
96 Robert Millan. Documentation is in experimental-spec.txt
98 TF/04 Bugzilla 668: Fix parallel build (make -j).
100 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
102 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
103 Patch provided by Jan Srzednicki
105 TF/05 Leading white space used to be stripped from $spam_report which
106 wrecked the formatting. Now it is preserved.
108 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
109 that they are available at delivery time.
111 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
113 TF/08 TLS error reporting now respects the incoming_interface and
114 incoming_port log selectors.
116 TF/09 Produce a more useful error message if an SMTP transport's hosts
117 setting expands to an empty string.
119 NM/06 Bugzilla 744: EXPN did not work under TLS.
120 Patch provided by Phil Pennock
122 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
123 Patch provided by Richard Godbee
125 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
126 acl_smtp_notquit, added index entry.
128 NM/09 Bugzilla 787: Potential buffer overflow in string_format
129 Patch provided by Eugene Bujak
131 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
132 Patch provided by Maxim Dounin
134 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
135 Patch provided by Phil Pennock
137 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
139 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
140 Patch provided by Brad "anomie" Jorsch
142 NM/14 Bugzilla 622: Added timeout setting to transport filter.
143 Patch provided by Dean Brooks
145 TK/05 Add native DKIM support (does not depend on external libraries).
147 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
148 Patch provided by Graeme Fowler
150 NM/16 Bugzilla 851: Documentation example syntax fix.
152 NM/17 Changed NOTICE file to remove references to embedded PCRE.
154 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
156 NM/19 Bugzilla 745: TLS version reporting
157 Patch provided by Phil Pennock
159 NM/20 Bugzilla 167: bool: condition support
160 Patch provided by Phil Pennock
162 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
163 Patch provided by Phil Pennock
165 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
166 Patch provided by Brad "anomie" Jorsch
168 NM/23 Bugzilla 687: Fix misparses in eximstats
169 Patch provided by Heiko Schlittermann
171 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
172 Patch provided by Heiko Schlittermann
174 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
175 plus update to original patch.
177 NM/26 Bugzilla 799: Documentation correction for ratelimit
179 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
180 Patch provided by David Brownlee
182 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
184 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
186 NM/30 Bugzilla 888: TLS documentation bugfixes
188 NM/31 Bugzilla 896: Dovecot buffer overrun fix
190 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
191 Unlike the original bugzilla I have changed all shell scripts in src tree
193 NM/33 Bugzilla 898: Transport filter timeout fix
194 Patch by Todd Rinaldo
196 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
197 Patch by Serge Demonchaux
199 NM/35 Bugzilla 39: Base64 decode bug fixes
200 Patch by Jakob Hirsch
202 NM/36 Bugzilla 909: Correct connect() call in dcc code
204 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
206 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
208 NM/39 Bugzilla 911: Fixed MakeLinks build script
214 TK/01 Add preliminary DKIM support. Currently requires a forked version of
215 ALT-N's libdkim that I have put here:
216 http://duncanthrax.net/exim-experimental/
218 Note to Michael Haardt: I had to rename some vars in sieve.c. They
219 were called 'true' and it seems that C99 defines that as a reserved
220 keyword to be used with 'bool' variable types. That means you could
221 not include C99-style headers which use bools without triggering
222 build errors in sieve.c.
224 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
225 as mailq or other aliases. Changed the --help handling significantly
226 to do whats expected. exim_usage() emits usage/help information.
228 SC/01 Added the -bylocaldomain option to eximstats.
230 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
232 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
234 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
240 PH/01 Another patch from the Sieve maintainer.
242 PH/02 When an IPv6 address is converted to a string for single-key lookup
243 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
244 dots are used instead of colons so that keys in lsearch files need not
245 contain colons. This was done some time before quoting was made available
246 in lsearch files. However, iplsearch files do require colons in IPv6 keys
247 (notated using the quote facility) so as to distinguish them from IPv4
248 keys. This meant that lookups for IP addresses in host lists did not work
249 for iplsearch lookups.
251 This has been fixed by arranging for IPv6 addresses to be expressed with
252 colons if the lookup type is iplsearch. This is not incompatible, because
253 previously such lookups could never work.
255 The situation is now rather anomolous, since one *can* have colons in
256 ordinary lsearch keys. However, making the change in all cases is
257 incompatible and would probably break a number of configurations.
259 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
262 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
263 conversion specification without a maximum field width, thereby enabling
264 a rogue spamd server to cause a buffer overflow. While nobody in their
265 right mind would setup Exim to query an untrusted spamd server, an
266 attacker that gains access to a server running spamd could potentially
267 exploit this vulnerability to run arbitrary code as the Exim user.
269 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
270 $primary_hostname instead of what libspf2 thinks the hosts name is.
272 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
273 a directory entry by the name of the lookup key. Previously, if a
274 symlink pointed to a non-existing file or a file in a directory that
275 Exim lacked permissions to read, a lookup for a key matching that
276 symlink would fail. Now it is enough that a matching directory entry
277 exists, symlink or not. (Bugzilla 503.)
279 PH/03 The body_linecount and body_zerocount variables are now exported in the
282 PH/04 Added the $dnslist_matched variable.
284 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
285 This means they are set thereafter only if the connection becomes
288 PH/06 Added the client_condition to authenticators so that some can be skipped
289 by clients under certain conditions.
291 PH/07 The error message for a badly-placed control=no_multiline_responses left
292 "_responses" off the end of the name.
294 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
296 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
297 (without spaces) instead of just copying the configuration text.
299 PH/10 Added the /noupdate option to the ratelimit ACL condition.
301 PH/11 Added $max_received_linelength.
303 PH/12 Added +ignore_defer and +include_defer to host lists.
305 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
306 way in which PCRE > 7.0 is built.
308 PH/14 Implemented queue_only_load_latch.
310 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
311 MAIL command. The effect was to mangle the value on 64-bit systems.
313 PH/16 Another patch from the Sieve maintainer.
315 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
317 PH/18 If a system quota error occurred while trying to create the file for
318 a maildir delivery, the message "Mailbox is full" was not appended to the
319 bounce if the delivery eventually timed out. Change 4.67/27 below applied
320 only to a quota excession during the actual writing of the file.
322 PH/19 It seems that peer DN values may contain newlines (and other non-printing
323 characters?) which causes problems in log lines. The DN values are now
324 passed through string_printing() before being added to log lines.
326 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
327 and InterBase are left for another time.)
329 PH/21 Added message_body_newlines option.
331 PH/22 Guard against possible overflow in moan_check_errorcopy().
333 PH/23 POSIX allows open() to be a macro; guard against that.
335 PH/24 If the recipient of an error message contained an @ in the local part
336 (suitably quoted, of course), incorrect values were put in $domain and
337 $local_part during the evaluation of errors_copy.
343 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
344 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
347 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
348 issue a MAIL command.
350 PH/02 In an ACL statement such as
352 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
354 if a client was not listed at all, or was listed with a value other than
355 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
356 the condition was not true (as it should be), so access was not denied.
357 The bug was that the ! inversion was incorrectly passed on to the second
358 item. This has been fixed.
360 PH/03 Added additional dnslists conditions == and =& which are different from
361 = and & when the dns lookup returns more than one IP address.
363 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
364 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
366 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
367 FSYNC, which compiles an option called disable_fsync that allows for
368 bypassing fsync(). The documentation is heavily laced with warnings.
370 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
372 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
373 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
374 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
375 including adding "make clean"; (3) Added -fPIC when compiling the test
376 dynamically loaded module, to get rid of a warning.
378 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
379 message fails, move_frozen_messages = true and ignore_bounce_errors_after
380 = 0s. The bug is otherwise harmless.
382 PH/07 There was a bug in the dovecot authenticator such that the value of
383 $auth1 could be overwritten, and so not correctly preserved, after a
384 successful authentication. This usually meant that the value preserved by
385 the server_setid option was incorrect.
387 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
389 PH/09 Installed PCRE release 7.0.
391 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
392 run for batched SMTP input. It is now run at the start of every message
393 in the batch. While fixing this I discovered that the process information
394 (output by running exiwhat) was not always getting set for -bs and -bS
395 input. This is fixed, and it now also says "batched" for BSMTP.
397 PH/11 Added control=no_pipelining.
399 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
400 patch, slightly modified), and move the expansion of helo_data till after
401 the connection is made in the smtp transport (so it can use these
404 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
406 PH/14 Added log_selector = +pid.
408 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
410 PH/16 Add ${if forany and ${if forall.
412 PH/17 Added dsn_from option to vary the From: line in DSNs.
414 PH/18 Flush SMTP output before performing a callout, unless control =
415 no_callout_flush is set.
417 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
418 was true (the default) a successful delivery failed to delete the retry
419 item, thus causing premature timeout of the address. The bug is now
422 PH/20 Added hosts_avoid_pipelining to the smtp transport.
424 PH/21 Long custom messages for fakedefer and fakereject are now split up
425 into multiline reponses in the same way that messages for "deny" and
426 other ACL rejections are.
428 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
429 with slight modification.
431 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
432 draft, changing the syntax and factoring some duplicate code".
434 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
435 for deliveries of the second and subsequent messages over the same SMTP
438 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
439 ${reduce, with only minor "tidies".
441 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
443 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
444 expansion side effects.
446 PH/27 When a message times out after an over-quota error from an Exim-imposed
447 quota, the bounce message says "mailbox is full". This message was not
448 being given when it was a system quota that was exceeded. It now should
451 MH/03 Made $recipients available in local_scan(). local_scan() already has
452 better access to the recipient list through recipients_list[], but
453 $recipients can be useful in postmaster-provided expansion strings.
455 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
456 in the case of a MAIL command with additional options following the
457 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
458 were accidentally chopped off.
460 PH/29 SMTP synchronization checks are implemented when a command is read -
461 there is a check that no more input is waiting when there shouldn't be
462 any. However, for some commands, a delay in an ACL can mean that it is
463 some time before the response is written. In this time, more input might
464 arrive, invalidly. So now there are extra checks after an ACL has run for
465 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
466 pipelining has not been advertised.
468 PH/30 MH's patch to allow iscntrl() characters to be list separators.
470 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
471 returned in the SMTP response when smtp_return_error_details was false.
474 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
475 instead of the C I/O that was originally supplied, because problems were
478 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
479 Exim which did not show up earlier: it was assuming that a call to
480 SSL_CTX_set_info_callback() might give an error value. In fact, there is
481 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
482 was a macro that became an assignment, so it seemed to work. This has
483 changed to a proper function call with a void return, hence the compile
484 error. Exim's code has been fixed.
486 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
489 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
491 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
493 PH/37 If a message is not accepted after it has had an id assigned (e.g.
494 because it turns out to be too big or there is a timeout) there is no
495 "Completed" line in the log. When some messages of this type were
496 selected by exigrep, they were listed as "not completed". Others were
497 picked up by some special patterns. I have improved the selection
498 criteria to be more general.
500 PH/38 The host_find_failed option in the manualroute router can now be set
501 to "ignore", to completely ignore a host whose IP address cannot be
502 found. If all hosts are ignored, the behaviour is controlled by the new
503 host_all_ignored option.
505 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
506 homing or because of multiple MX records with /mx) generated more than
507 one IP address, and the following item turned out to be the local host,
508 all the secondary addresses of the first item were incorrectly removed
509 from the list, along with the local host and any following hosts (which
510 is what is supposed to happen).
512 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
513 whoever called Exim into the -H file. In the case of the daemon it was
514 behaving confusingly. When first started, it used values for whoever
515 started the daemon, but after a SIGHUP it used the Exim user (because it
516 calls itself on a restart). I have changed the code so that it now always
519 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
520 message are rejected with the same error (e.g. no authentication or bad
521 sender address), and a DATA command is nevertheless sent (as can happen
522 with PIPELINING or a stupid MUA), the error message that was given to the
523 RCPT commands is included in the rejection of the DATA command. This is
524 intended to be helpful for MUAs that show only the final error to their
527 PH/42 Another patch from the Sieve maintainer.
529 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
530 Eximstats - Fixed some broken HTML links and added missing column headers
532 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
533 columns for Rejects, Temp Rejects, Ham, and Spam rows.
535 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
537 PH/43 Yet another patch from the Sieve maintainer.
539 PH/44 I found a way to check for a TCP/IP connection going away before sending
540 the response to the final '.' that terminates a message, but only in the
541 case where the client has not sent further data following the '.'
542 (unfortunately, this is allowed). However, in many cases there won't be
543 any further data because there won't be any more messages to send. A call
544 to select() can be used: if it shows that the input is "ready", there is
545 either input waiting, or the socket has been closed. An attempt to read
546 the next input character can distinguish the two cases. Previously, Exim
547 would have sent an OK response which the client would never have see.
548 This could lead to message repetition. This fix should cure that, at
549 least in a lot of common cases.
551 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
552 advertised in response to EHLO.
558 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
559 fixed by 4.65/MH/01 (is this a record?) are fixed:
561 (i) An empty string was always treated as zero by the numeric comparison
562 operators. This behaviour has been restored.
564 (ii) It is documented that the numeric comparison operators always treat
565 their arguments as decimal numbers. This was broken in that numbers
566 starting with 0 were being interpreted as octal.
568 While fixing these problems I realized that there was another issue that
569 hadn't been noticed. Values of message_size_limit (both the global option
570 and the transport option) were treated as octal if they started with 0.
571 The documentation was vague. These values are now always treated as
572 decimal, and I will make that clear in the documentation.
578 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
579 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
582 MH/01 Don't check that the operands of numeric comparison operators are
583 integers when their expansion is in "skipping" mode (fixes bug
584 introduced by 4.64-PH/07).
586 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
587 child addresses, Exim now panics and dies. Previously, because the count
588 is held in a short int, deliveries were likely to be lost. As such a
589 large number of recipients for a single message is ridiculous
590 (performance will be very, very poor), I have chosen to impose a limit
591 rather than extend the field.
597 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
598 leftover -K file (the existence of which was triggered by #402).
599 While we were at it, introduced process PID as part of the -K
600 filename. This should rule out race conditions when creating
603 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
604 processing considerably. Previous code took too long for large mails,
605 triggering a timeout which in turn triggers #401.
607 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
608 in the DK code in transports.c. sendfile() is not really portable,
609 hence the _LINUX specificness.
611 TF/01 In the add_headers option to the mail command in an Exim filter,
612 there was a bug that Exim would claim a syntax error in any
613 header after the first one which had an odd number of characters
616 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
617 callout verification, Exim cached a "reject" for the entire domain. This
618 is correct for most verifications, but it is not correct for a recipient
619 verification with use_sender or use_postmaster set, because in that case
620 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
621 case of MAIL FROM:<> rejection from other early rejections (e.g.
622 rejection of HELO). When verifying a recipient using a non-null MAIL
623 address, the cache is ignored if it shows MAIL FROM:<> rejection.
624 Whatever the result of the callout, the value of the domain cache is
625 left unchanged (for any other kind of callout, getting as far as trying
626 RCPT means that the domain itself is ok).
628 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
631 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
632 manifest itself as EPIPE rather than ECONNECT. When tidying away a
633 session, the daemon ignores ECONNECT errors and logs others; it now
634 ignores EPIPE as well.
636 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
637 (quoted-printable decoding).
639 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
640 later the small subsequent patch to fix an introduced bug.
642 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
644 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
646 PH/08 An error is now given if message_size_limit is specified negative.
648 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
649 to be given (somewhat) arbitrary names.
651 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
654 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
655 miscellaneous code fixes
657 PH/10 Added the log_reject_target ACL modifier to specify where to log
660 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
661 hostname. This is wrong, because it relates to the incoming message (and
662 probably the interface on which it is arriving) and not to the outgoing
663 callout (which could be using a different interface). This has been
664 changed to use the value of the helo_data option from the smtp transport
665 instead - this is what is used when a message is actually being sent. If
666 there is no remote transport (possible with a router that sets up host
667 addresses), $smtp_active_hostname is used.
669 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
670 tweaks were necessary in order to get it to work (see also 21 below):
671 (a) The code assumed that strncpy() returns a negative number on buffer
672 overflow, which isn't the case. Replaced with Exim's string_format()
674 (b) There were several signed/unsigned issues. I just did the minimum
675 hacking in of casts. There is scope for a larger refactoring.
676 (c) The code used strcasecmp() which is not a standard C function.
677 Replaced with Exim's strcmpic() function.
678 (d) The code set only $1; it now sets $auth1 as well.
679 (e) A simple test gave the error "authentication client didn't specify
680 service in request". It would seem that Dovecot has changed its
681 interface. Fortunately there's a specification; I followed it and
682 changed what the client sends and it appears to be working now.
684 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
687 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
688 address A is aliased to B and C, where B exists and C does not. Without
689 -v the output is "A verified" because verification stops after a
690 successful redirection if more than one address is generated. However,
691 with -v the child addresses are also verified. Exim was outputting "A
692 failed to verify" and then showing the successful verification for C,
693 with its parentage. It now outputs "B failed to verify", showing B's
694 parentage before showing the successful verification of C.
696 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
697 look up a TXT record in a specific list after matching in a combined
700 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
701 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
702 they consult the DNS. I had assumed they would set it the way they
703 wanted; and indeed my experiments on Linux seem to show that in some
704 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
705 To be on the safe side, however, I have now made the interface to
706 host_find_byname() similar to host_find_bydns(), with an argument
707 containing the DNS resolver options. The host_find_byname() function now
708 sets these options at its start, just as host_find_bydns() does. The smtp
709 transport options dns_qualify_single and dns_search_parents are passed to
710 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
711 of host_find_byname() use the default settings of RES_DEFNAMES
712 (qualify_single) but not RES_DNSRCH (search_parents).
714 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
715 spool_read_header() do less string testing, by means of a preliminary
716 switch on the second character of optional "-foo" lines. (This is
717 overdue, caused by the large number of possibilities that now exist.
718 Originally there were few.) While I was there, I also converted the
719 str(n)cmp tests so they don't re-test the leading "-" and the first
720 character, in the hope this might squeeze out yet more improvement.
722 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
723 flag allowing group syntax was set by the header_syntax check but not
724 turned off, possible causing trouble later; (2) The flag was not being
725 set at all for the header_verify test, causing "group"-style headers to
726 be rejected. I have now set it in this case, and also caused header_
727 verify to ignore an empty address taken from a group. While doing this, I
728 came across some other cases where the code for allowing group syntax
729 while scanning a header line wasn't quite right (mostly, not resetting
730 the flag correctly in the right place). These bugs could have caused
731 trouble for malformed header lines. I hope it is now all correct.
733 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
734 with the "reply" argument non-NULL. The code, however (which originally
735 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
736 but it didn't always do it. This confused somebody who was copying the
737 code for some other use. I have removed all the tests.
739 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
740 feature that was used to support insecure browsers during the U.S. crypto
741 embargo. It requires special client support, and Exim is probably the
742 only MTA that supported it -- and would never use it because real RSA is
743 always available. This code has been removed, because it had the bad
744 effect of slowing Exim down by computing (never used) parameters for the
745 RSA_EXPORT functionality.
747 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
748 authenticator to fail if there's a tab character in the incoming data
749 (there should never be unless someone is messing about, as it's supposed
750 to be base64-encoded). Also added, on Timo's advice, the "secured" option
751 if the connection is using TLS or if the remote IP is the same as the
752 local IP, and the "valid-client-cert option" if a client certificate has
755 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
756 authenticators. This can be used for authorization after authentication
757 succeeds. (In the case of plaintext, it servers for both authentication
760 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
761 if any retry times were supplied.
763 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
764 connection, where there is no client IP address to check. In this
765 situation, the verify now always succeeds.
767 PH/25 Applied John Jetmore's -Mset patch.
769 PH/26 Added -bem to be like -Mset, but loading a message from a file.
771 PH/27 In a string expansion for a processed (not raw) header when multiple
772 headers of the same name were present, leading whitespace was being
773 removed from all of them, but trailing whitespace was being removed only
774 from the last one. Now trailing whitespace is removed from each header
775 before concatenation. Completely empty headers in a concatenation (as
778 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
779 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
781 PH/29 [Removed. This was a change that I later backed out, and forgot to
782 correct the ChangeLog entry (that I had efficiently created) before
783 committing the later change.]
785 PH/30 Exim was sometimes attempting to deliver messages that had suffered
786 address errors (4xx response to RCPT) over the same connection as other
787 messages routed to the same hosts. Such deliveries are always "forced",
788 so retry times are not inspected. This resulted in far too many retries
789 for the affected addresses. The effect occurred only when there were more
790 hosts than the hosts_max_try setting in the smtp transport when it had
791 the 4xx errors. Those hosts that it had tried were not added to the list
792 of hosts for which the message was waiting, so if all were tried, there
793 was no problem. Two fixes have been applied:
795 (i) If there are any address or message errors in an SMTP delivery, none
796 of the hosts (tried or untried) are now added to the list of hosts
797 for which the message is waiting, so the message should not be a
798 candidate for sending over the same connection that was used for a
799 successful delivery of some other message. This seems entirely
800 reasonable: after all the message is NOT "waiting for some host".
801 This is so "obvious" that I'm not sure why it wasn't done
802 previously. Hope I haven't missed anything, but it can't do any
803 harm, as the worst effect is to miss an optimization.
805 (ii) If, despite (i), such a delivery is accidentally attempted, the
806 routing retry time is respected, so at least it doesn't keep
807 hammering the server.
809 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
810 in ${readsocket because some servers need this prod.
812 PH/32 Added some extra debug output when updating a wait-xxx database.
814 PH/33 The hint "could be header name not terminated by colon", which has been
815 given for certain expansion errors for a long time, was not being given
816 for the ${if def:h_colon_omitted{... case.
818 PH/34 The spec says: "With one important exception, whenever a domain list is
819 being scanned, $domain contains the subject domain." There was at least
820 one case where this was not true.
822 PH/35 The error "getsockname() failed: connection reset by peer" was being
823 written to the panic log as well as the main log, but it isn't really
824 panic-worthy as it just means the connection died rather early on. I have
825 removed the panic log writing for the ECONNRESET error when getsockname()
828 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
829 runs only) independently of the message's sender address. This meant
830 that, if the 4xx error was in fact related to the sender, a different
831 message to the same recipient with a different sender could confuse
832 things. In particualar, this can happen when sending to a greylisting
833 server, but other circumstances could also provoke similar problems.
834 I have changed the default so that the retry time for these errors is now
835 based a combination of the sender and recipient addresses. This change
836 can be overridden by setting address_retry_include_sender=false in the
839 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
840 remote server are returned as part of bounce messages. This was not
841 happening for LMTP over a pipe (the lmtp transport), but now it is the
842 same for both kinds of LMTP.
844 PH/38 Despite being documented as not happening, Exim was rewriting addresses
845 in header lines that were in fact CNAMEs. This is no longer the case.
847 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
848 and queue runs started by the daemon processed all messages. This has
849 been fixed so that -R and -S can now usefully be given with -q<time>.
851 PH/40 Import PCRE release 6.7 (fixes some bugs).
853 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
855 PH/42 Give an error if -q is specified more than once.
857 PH/43 Renamed the variables $interface_address and $interface_port as
858 $received_ip_address and $received_port, to make it clear that these
859 values apply to message reception, and not to the outgoing interface when
860 a message is delivered. (The old names remain recognized, of course.)
862 PH/44 There was no timeout on the connect() call when using a Unix domain
863 socket in the ${readsocket expansion. There now is.
865 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
866 be meaningful with "accept".
868 SC/01 Eximstats V1.43
869 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
871 SC/02 Eximstats V1.44
872 Use a glob alias rather than an array ref in the generated
873 parser. This improves both readability and performance.
875 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
876 Collect SpamAssassin and rejection statistics.
877 Don't display local sender or destination tables unless
878 there is data to show.
879 Added average volumes into the top table text output.
881 SC/04 Eximstats V1.46
882 Collect data on the number of addresses (recipients)
883 as well as the number of messages.
885 SC/05 Eximstats V1.47
886 Added 'Message too big' to the list of mail rejection
887 reasons (thanks to Marco Gaiarin).
889 SC/06 Eximstats V1.48
890 Mainlog lines which have GMT offsets and are too short to
891 have a flag are now skipped.
893 SC/07 Eximstats V1.49 (Alain Williams)
894 Added the -emptyok flag.
896 SC/08 Eximstats V1.50
897 Fixes for obtaining the IP address from reject messages.
899 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
900 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
901 whitesspace changes from 4.64-PH/27
903 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
906 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
907 are found, allow negative numbers in numeric criteria)
909 JJ/06 exipick.20061117.2, added new $message_body_missing variable
911 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
912 to match changes made in 4.64-PH/43
914 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
916 PH/47 Put in an explicit test for a DNS lookup of an address record where the
917 "domain" is actually an IP address, and force a failure. This locks out
918 those revolvers/nameservers that support "A-for-A" lookups, in
919 contravention of the specifications.
921 PH/48 When a host name was looked up from an IP address, and the subsequent
922 forward lookup of the name timed out, the host name was left in
923 $sender_host_name, contrary to the specification.
925 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
926 restricted to single-key lookups, Exim was not diagnosing an error if
927 * or *@ was used with a query-style lookup.
929 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
931 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
932 long ago, but noone interested enough thought of it. Let's just say that
933 the "1.1" means that there are some new functions that weren't there at
934 some point in the past.
936 PH/51 Error processing for expansion failure of helo_data from an smtp
937 transport during callout processing was broken.
939 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
940 tested/used via the -bh/-bhc/-bs options.
942 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
943 bug, fixed in subsequent PCRE releases).
945 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
946 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
948 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
954 SC/01 Use a glob alias rather than an array ref in eximstats generated
955 parser. This improves both readability and performance.
957 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
958 Don't display local sender or destination tables in eximstats unless
959 there is data to show.
960 Added average volumes into the eximstats top table text output.
962 SC/03 Collect data on the number of addresses (recipients) as well
963 as the number of messages in eximstats.
965 TF/01 Correct an error in the documentation for the redirect router. Exim
966 does (usually) call initgroups() when daemonizing.
968 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
969 with consistent privilege compared to when running as a daemon.
971 TF/03 Note in the spec that $authenticated_id is not set for local
972 submissions from trusted users.
974 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
975 Thanks to Dean Brooks <dean@iglou.com> for the patch.
977 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
978 by adding some example configuration directives to the default
979 configuration file. A little bit of work is required to uncomment the
980 directives and define how usernames and passwords are checked, but
981 there is now a framework to start from.
983 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
984 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
985 without this. I don't know how relevant this is to other LDAP libraries.
987 PH/02 Add the verb name to the "unknown ACL verb" error.
989 PH/03 Magnus Holmgren's patch for filter_prepend_home.
991 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
993 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
994 directory not expanded when it should be if an expanded home directory
995 was set for the address (which is overridden by the transport).
997 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1000 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1001 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1002 because it is too late at that time, and has no effect.
1004 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1005 security issue with \' (bugzilla #107). I could not use the
1006 PQescapeStringConn() function, because it needs a PGconn value as one of
1009 PH/08 When testing addresses using -bt, indicate those final addresses that
1010 are duplicates that would not cause an additional delivery. At least one
1011 person was confused, thinking that -bt output corresponded to deliveries.
1012 (Suppressing duplicates isn't a good idea as you lose the information
1013 about possibly different redirections that led to the duplicates.)
1015 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1016 systems where poll() doesn't work, in particular OS X.
1018 PH/10 Added more information to debugging output for retry time not reached.
1020 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1021 operations in malware.c.
1023 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1026 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1027 syslog_duplication set false, log lines that would normally be written
1028 both the the main log and to the reject log were not written to syslog at
1031 PH/14 In the default configuration, change the use of "message" in ACL warn
1032 statements to "add_header".
1034 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1035 not followed by a command (e.g. "seen endif").
1037 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1038 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1041 PH/17 Added extra conditions to the default value of delay_warning_condition
1045 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1046 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1047 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1050 The Auto-Submitted: and various List- headers are standardised, whereas I
1051 don't think Precedence: ever was.
1053 PH/18 Refactored debugging code in route_finduser() to show more information,
1054 in particular, the error code if getpwnam() issues one.
1056 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1057 This is apparently needed in addition to the PH/07 change above to avoid
1058 any possible encoding problems.
1060 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1061 but not after initializing Perl.
1063 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1064 output them only if debugging. By default they are written stderr,
1065 apparently, which is not desirable.
1067 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1070 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1073 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1075 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1076 authenticated or an ident call has been made. Suppress the default
1077 values for $authenticated_id and $authenticated_sender (but permit -oMai
1078 and -oMas) when testing with -bh.
1080 PH/24 Re-jigged the order of the tests in the default configuration so that the
1081 tests for valid domains and recipients precede the DNS black list and CSA
1082 tests, on the grounds that those ones are more expensive.
1084 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1085 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1086 This bug exists in every version of Exim that I still have, right back to
1089 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1090 However, an attempt to turn on case-sensitivity in a regex key by
1091 including (?-i) didn't work because the subject string was already
1092 lowercased, and the effects were non-intuitive. It turns out that a
1093 one-line patch can be used to allow (?-i) to work as expected.
1099 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1100 other effects) broke the use of negated acl sub-conditions.
1102 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1105 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1106 "Deny" causes Exim to reject the incoming connection with a 554 error.
1107 Unfortunately, if there is a major crisis, such as a disk failure,
1108 tcp-wrappers gives "deny", whereas what one would like would be some
1109 kind of temporary error. A kludge has been added to help with this.
1110 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1111 554 error is used if errno is still zero or contains ENOENT (which occurs
1112 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1115 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1117 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1118 errors. Otherwise a message that provokes a temporary error (when other
1119 messages do not) can cause a whole host to time out.
1121 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1122 addresses were routed directly to files or pipes from a redirect router.
1123 File deliveries just didn't batch; pipe deliveries might have suffered
1126 PH/06 A failure to get a lock for a hints database would erroneously always say
1127 "Failed to get write lock", even when it was really a read lock.
1129 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1130 of 0600. This has been changed to use the value of the lockfile_mode
1131 option (which defaults to 0600).
1133 PH/08 Applied small patch from the Sieve maintainer.
1135 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1136 folder from quota calculations, a direct delivery into this folder messed
1137 up the contents of the maildirsize file. This was because the regex was
1138 used only to exclude .Trash (or whatever) when the size of the mailbox
1139 was calculated. There was no check that a delivery was happening into an
1140 excluded directory. This bug has been fixed by ignoring all quota
1141 processing for deliveries into excluded directories.
1143 PH/10 Added the maildirfolder_create_regex option to appendfile.
1149 PH/01 The code for finding all the local interface addresses on a FreeBSD
1150 system running IPv6 was broken. This may well have applied to all BSD
1151 systems, as well as to others that have similar system calls. The broken
1152 code found IPv4 interfaces correctly, but gave incorrect values for the
1153 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1154 that it would not match correctly against @[] and not recognize the IPv6
1157 PH/02 The ipliteral router was not recognizing addresses of the form user@
1158 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1160 PH/03 Added disable_ipv6.
1162 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1163 decoded form, because it is most often used to construct To: headers
1164 lines in autoreplies, and the decoded form may well be syntactically
1165 invalid. However, $reply_address has leading white space removed, and all
1166 newlines turned into spaces so that the autoreply transport does not
1169 PH/05 If group was specified without a user on a router, and no group or user
1170 was specified on a transport, the group from the router was ignored.
1172 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1173 for visible compile-time settings that can be used to change these
1174 numbers, for those that want even more. Backwards compatibility with old
1175 spool files has been maintained. However, going back to a previous Exim
1176 release will lost any variables that are in spool files.
1178 PH/07 Two small changes when running in the test harness: increase delay when
1179 passing a TCP/IP connection to a new process, in case the original
1180 process has to generate a bounce, and remove special handling of
1181 127.0.0.2 (sic), which is no longer necessary.
1183 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1184 be the same on different OS.
1186 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1189 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1190 whether --show-vars was specified or not
1192 JJ/02 exipick: Added support for new ACL variable spool format introduced
1195 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1196 syntactically invalid From: or Reply-to: line, and a filter used this to
1197 generate an autoreply, and therefore failed to obtain an address for the
1198 autoreply, Exim could try to deliver to a non-existent relative file
1199 name, causing unrelated and misleading errors. What now happens is that
1200 it logs this as a hard delivery error, but does not attempt to create a
1203 PH/11 The exinext utility has a -C option for testing purposes, but although
1204 the given file was scanned by exinext itself; it wasn't being passed on
1205 when Exim was called.
1207 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1208 an end-of-file indication when reading a command response.
1210 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1211 compiled. In many other places in Exim, IPv6 addresses are always
1212 recognized, so I have changed this. It also means that IPv4 domain
1213 literals of the form [IPV4:n.n.n.n] are now always recognized.
1215 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1216 used if the router is not running as root, for example, when verifying at
1217 ACL time, or when using -bh. The debugging output from this situation was
1218 non-existent - all you got was a failure to exec. I have made two
1221 (a) Failures to set uid/gid, the current directory, or a process leader
1222 in a subprocess such as that created by queryprogram now generate
1223 suitable debugging ouput when -d is set.
1225 (b) The queryprogram router detects when it is not running as root,
1226 outputs suitable debugging information if -d is set, and then runs
1227 the subprocess without attempting to change uid/gid.
1229 PH/15 Minor change to Makefile for building test_host (undocumented testing
1232 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1233 additional section of a DNS packet that returns MX or SRV records.
1234 Instead, it always explicitly searches for A/AAAA records. This avoids
1235 major problems that occur when a DNS server includes only records of one
1236 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1237 fixed another bug: if SRV records were looked up and the corresponding
1238 address records were *not* found in the additional section, the port
1239 values from the SRV records were lost.
1241 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1242 using the correct key (the original address) when searching the retry
1243 rules in order to find which one to use for generating the retry hint.
1245 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1246 adding the default one. Similarly, if it contains a Reply-To: header, the
1247 errors_reply_to option, if set, is not used.
1249 PH/19 When calculating a retry time, Exim used to measure the "time since
1250 failure" by looking at the "first failed" field in the retry record. Now
1251 it does not use this if it is later than than the arrival time of the
1252 message. Instead it uses the arrival time. This makes for better
1253 behaviour in cases where some deliveries succeed, thus re-setting the
1254 "first failed" field. An example is a quota failure for a huge message
1255 when small messages continue to be delivered. Without this change, the
1256 "time since failure" will always be short, possible causing more frequent
1257 delivery attempts for the huge message than are intended.
1258 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1260 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1261 $1, $2, $3) because the numerical variables can be reset during some
1262 expansion items (e.g. "match"), thereby losing the authentication data.
1264 PH/21 Make -bV show the size of off_t variables so that the test suite can
1265 decide whether to run tests for quotas > 2G.
1267 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1268 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1269 filecount value is greater than 2G or if a quota value is greater than 2G
1270 on a system where the size of off_t is not greater than 4, a panic error
1273 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1274 never match. The debug and -bh output now contains an explicit error
1275 message indicating a malformed IPv4 address or mask.
1277 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1278 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1279 PH/23 above applies.
1281 PH/25 Do not write to syslog when running in the test harness. The only
1282 occasion when this arises is a failure to open the main or panic logs
1283 (for which there is an explicit test).
1285 PH/26 Added the /no_tell option to "control=freeze".
1287 PH/27 If a host name lookup failed very early in a connection, for example, if
1288 the IP address matched host_lookup and the reverse lookup yielded a name
1289 that did not have a forward lookup, an error message of the form "no IP
1290 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1291 could be logged. Now it outputs the IP address instead of "NULL".
1293 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1294 allows the sender and the authenticated sender to be set when
1295 submitting a message from within Exim. Since child_open_exim() is
1296 documented for local_scan(), the new function should be too.
1298 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1299 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1300 results in an empty string is now treated as unset.
1302 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1304 PH/31 Added sender_verify_fail logging option.
1306 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1307 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1308 tidied the source and removed it altogether.
1310 PH/33 When a queue run was abandoned because the load average was too high, a
1311 log line was always written; now it is written only if the queue_run log
1312 selector is set. In addition, the log line for abandonment now contains
1313 information about the queue run such as the pid. This is always present
1314 in "start" and "stop" lines but was omitted from the "abandon" line.
1316 PH/34 Omit spaces between a header name and the colon in the error message that
1317 is given when verify = headers_syntax fails (if there are lots of them,
1318 the message gets confusing).
1320 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1321 names, as there are now some PTR records that contain slashes. This check
1322 is only to protect against broken name servers that fall over on strange
1323 characters, so the fact that it applies to all lookups doesn't matter.
1325 PH/36 Now that the new test suite is complete, we can remove some of the
1326 special code in Exim that was needed for the old test suite. For example,
1327 sorting DNS records because real resolvers return them in an arbitrary
1328 order. The new test suite's fake resolver always returns records in the
1331 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1332 bounces) except when queue_only is set, to avoid logging races between
1333 the different processes.
1335 PH/38 Panic-die if .include specifies a non-absolute path.
1337 PH/39 A tweak to the "H" retry rule from its user.
1339 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1340 a label. They prevented compilation on older perls.
1342 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1343 a warning to be raised on newish perls.
1345 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1346 on queue. Changes to match documented behaviour of showing count of
1347 messages matching specified criteria.
1349 PH/40 Changed the default ident timeout from 30s to 5s.
1351 PH/41 Added support for the use of login_cap features, on those BSD systems
1352 that have them, for controlling the resources used by pipe deliveries.
1354 PH/42 The content-scanning code uses fopen() to create files in which to put
1355 message data. Previously it was not paying any attention to the mode of
1356 the files. Exim runs with umask(0) because the rest of the code creates
1357 files with open(), and sets the required mode explicitly. Thus, these
1358 files were ending up world-writeable. This was not a big issue, because,
1359 being within the spool directory, they were not world-accessible. I have
1360 created a function called modefopen, which takes an additional mode
1361 argument. It sets umask(777), creates the file, chmods it to the required
1362 mode, then resets the umask. All the relevant calls to fopen() in the
1363 content scanning code have been changed to use this function.
1365 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1366 to 24 hours. This avoids potential overflow problems when processing G
1367 and H retry rules. I suspect nobody ever tinkers with this value.
1369 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1371 PH/45 When the plaintext authenticator is running as a client, the server's
1372 challenges are checked to ensure they are valid base64 strings. By
1373 default, the authentication attempt is cancelled if an invalid string is
1374 received. Setting client_ignore_invalid_base64 true ignores these errors.
1375 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1376 they are received. Thus, the responses can be made to depend on the
1377 challenges. If an invalid string is ignored, an empty string is placed in
1380 PH/46 Messages that are created by the autoreply transport now contains a
1381 References: header, in accordance with RFCs 2822 and 3834.
1383 PH/47 Added authenticated_sender_force to the smtp transport.
1385 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1387 PH/49 Installed latest patch from the Sieve maintainer.
1389 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1390 was also set, the appendfile transport was unnecessarily scanning a
1391 directory of message files (e.g. for maildir delivery) to find the count
1392 of files (along with the size), even though it did not need this
1393 information. It now does the scan only if it needs to find either the
1394 size of the count of files.
1396 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1398 PH/52 Two bugs concerned with error handling when the smtp transport is
1401 (i) Exim was not creating retry information for temporary errors given
1402 for individual recipients after the DATA command when the smtp transport
1403 was used in LMTP mode. This meant that they could be retried too
1404 frequently, and not timed out correctly.
1406 (ii) Exim was setting the flag that allows error details to be returned
1407 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1408 recipients that were returned after the DATA command.
1410 PH/53 This is related to PH/52, but is more general: for any failing address,
1411 when detailed error information was permitted to be returned to the
1412 sender, but the error was temporary, then after the final timeout, only
1413 "retry timeout exceeded" was returned. Now it returns the full error as
1414 well as "retry timeout exceeded".
1416 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1417 do this, and (what is worse) MTAs that accept it.
1419 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1420 will now be deprecated.
1422 PH/56 New os.c-cygwin from the Cygwin maintainer.
1424 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1425 formats (previously only available in exim formats via -bpr, -bpru,
1426 and -bpra. Now also available in native and exiqgrep formats)
1428 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1429 with very large, slow to parse queues
1431 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1433 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1435 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1436 responses to authentication challenges, though it was showing the
1437 challenges; (ii) I've removed the CR characters from the debug output for
1440 PH/58 Allow for the insertion of a newline as well as a space when a string
1441 is turned into more than one encoded-word during RFC 2047 encoding. The
1442 Sieve code now uses this.
1444 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1445 data_4xx, lost_connection, tls_required.
1447 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1448 message was being sent as an SMTP response.
1450 PH/61 Add -l and -k options to exicyclog.
1452 PH/62 When verifying, if an address was redirected to one new address, so that
1453 verification continued, and the new address failed or deferred after
1454 having set something in $address_data, the value of $address_data was not
1455 passed back to the ACL. This was different to the case when no
1456 redirection occurred. The value is now passed back in both cases.
1458 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1459 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1460 use login_cap.h, so on its own it isn't the distinguishing feature. The
1461 new name refers directly to the setclassresources() function.
1463 PH/65 Added configuration files for NetBSD3.
1465 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1467 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1468 is preferred over IPv4.
1470 PH/68 The bounce_return_message and bounce_return_body options were not being
1471 honoured for bounces generated during the reception of non-SMTP messages.
1472 In particular, this applied to messages rejected by the ACL. This bug has
1473 been fixed. However, if bounce_return_message is true and bounce_return_
1474 body is false, the headers that are returned for a non-SMTP message
1475 include only those that have been read before the error was detected.
1476 (In the case of an ACL rejection, they have all been read.)
1478 PH/69 The HTML version of the specification is now built in a directory called
1479 spec_html instead of spec.html, because the latter looks like a path with
1480 a MIME-type, and this confuses some software.
1482 PH/70 Catch two compiler warnings in sieve.c.
1484 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1485 function verify_get_ident() calls ip_connect() to connect a socket, but
1486 if the "connect()" function timed out, ip_connect() used to close the
1487 socket. However, verify_get_ident() also closes the socket later, and in
1488 between Exim writes to the log, which may get opened at this point. When
1489 the socket was closed in ip_connect(), the log could get the same file
1490 descriptor number as the socket. This naturally causes chaos. The fix is
1491 not to close the socket in ip_connect(); the socket should be closed by
1492 the function that creates it. There was only one place in the code where
1493 this was missing, in the iplookup router, which I don't think anybody now
1494 uses, but I've fixed it anyway.
1496 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1497 well as to direct DNS lookups. Otherwise the handling of names in host
1498 lists is inconsistent and therefore confusing.
1504 PH/01 Two changes to the default runtime configuration:
1506 (1) Move the checks for relay_from_hosts and authenticated clients from
1507 after to before the (commented out) DNS black list checks.
1509 (2) Add control=submission to the relay_from_hosts and authenticated
1510 clients checks, on the grounds that messages accepted by these
1511 statements are most likely to be submissions.
1513 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1515 (1) Generate an error if the third argument for the ${prvs expansion is
1518 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1521 (3) Reset the variables that are obtained from the first argument of
1522 ${prvscheck and used in the second argument before leaving the code,
1523 because their memory is reclaimed, so using them afterwards may do
1526 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1527 one (it's much easier than Tom thought :-).
1529 (5) Because of (4), we can now allow for the use of $prvscheck_result
1530 inside the third argument.
1532 PH/03 For some reason, the default setting of PATH when running a command from
1533 a pipe transport was just "/usr/bin". I have changed it to
1536 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1537 anything to be listed in the output from -bV.
1539 PH/05 When a filter generated an autoreply, the entire To: header line was
1540 quoted in the delivery log line, like this:
1542 => >A.N.Other <ano@some.domain> <original@ddress> ...
1544 This has been changed so that it extracts the operative address. There
1545 may be more than one such address. If so, they are comma-separated, like
1548 => >ano@some.domain,ona@other.domain <original@ddress> ...
1550 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1551 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1552 not being looked up in the rDNS to get a host name, Exim was showing the
1553 IP address twice in Received: lines, even though the IP addresses were
1554 identical. For example:
1556 Received: from [1.2.3.4] (helo=[1.2.3.4])
1558 However, if the real host name was known, it was omitting the HELO data
1559 if it matched the actual IP address. This has been tidied up so that it
1560 doesn't show the same IP address twice.
1562 PH/07 When both +timestamp and +memory debugging was on, the value given by
1563 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1564 called by the debug printing, thereby overwriting the timestamp buffer.
1565 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1567 PH/08 When the original message was included in an autoreply transport, it
1568 always said "this is a copy of the message, including all the headers",
1569 even if body_only or headers_only was set. It now gives an appropriate
1572 PH/09 Applied a patch from the Sieve maintainer which:
1574 o fixes some comments
1575 o adds the (disabled) notify extension core
1576 o adds some debug output for the result of if/elsif tests
1577 o points to the current vacation draft in the documentation
1578 and documents the missing references header update
1582 o fixes a bug in processing the envelope test (when testing
1583 multiple envelope elements, the last element determinted the
1586 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1587 Electronic Mail") by including:
1589 Auto-submitted: auto-generated
1591 in the messages that it generates (bounce messages and others, such as
1592 warnings). In the case of bounce messages for non-SMTP mesages, there was
1593 also a typo: it was using "Auto_submitted" (underscore instead of
1594 hyphen). Since every message generated by Exim is necessarily in response
1595 to another message, thes have all been changed to:
1597 Auto-Submitted: auto-replied
1599 in accordance with these statements in the RFC:
1601 The auto-replied keyword:
1603 - SHOULD be used on messages sent in direct response to another
1604 message by an automatic process,
1606 - MUST NOT be used on manually-generated messages,
1608 - MAY be used on Delivery Status Notifications (DSNs) and Message
1609 Disposition Notifications (MDNs),
1611 - MUST NOT be used on messages generated by automatic or periodic
1612 processes, except for messages which are automatic responses to
1615 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1616 to the default Received: header definition.
1618 PH/12 Added log selector acl_warn_skipped (default on).
1620 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1621 variables because (a) they are in the wrong storage pool and (b) even if
1622 they were copied, it wouldn't work properly because of the caching.
1624 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1625 checking when decoding. Apparently there are clients that generate
1626 overlong encoded strings. Why am I not surprised?
1628 PH/15 If the first argument of "${if match_address" was not empty, but did not
1629 contain an "@" character, Exim crashed. Now it writes a panic log message
1630 and treats the condition as false.
1632 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1634 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1635 extension "envelope-auth". The code is finished and in agreement with
1636 other implementations, but there is no documentation so far and in fact,
1637 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1638 not changing the active code.
1640 Print executed "if" and "elsif" statements when debugging is used. This
1641 helps a great deal to understand what a filter does.
1643 Document more things not specified clearly in RFC3028. I had all this
1644 sorted out, when out of a sudden new issues came to my mind. Oops."
1646 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1649 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1650 canonical form (as documented). However, after a host name lookup from
1651 the IP address, check_host() was doing a simple string comparison with
1652 addresses acquired from the DNS when checking that the found name did
1653 have the original IP as one of its addresses. Since any found IPv6
1654 addresses are likely to be in abbreviated form, the comparison could
1655 fail. Luckily, there already exists a function for doing the comparison
1656 by converting both addresses to binary, so now that is used instead of
1657 the text comparison.
1659 PH/20 There was another similar case to PH/19, when a complete host name was
1660 given in a host list; looking up its IP address could give an abbreviated
1661 form, whereas the current host's name might or might not be abbreviated.
1662 The same fix has been applied.
1668 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1669 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1672 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1673 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1675 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1677 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1678 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1679 Also, for "Auto-Submitted", treat anything other than "no" as
1680 non-personal, in accordance with RFC 3834. (Previously it treated
1681 anything starting "auto-" as non-personal.)
1683 TF/01 The control=submission/name=... option had a problem with syntax
1684 errors if the name included a slash character. The /name= option
1685 now slurps the rest of the string, so it can include any characters
1686 but it must come last in the list of options (after /sender_retain
1689 PH/05 Some modifications to the interface to the fake nameserver for the new
1697 TK/01 Added the "success_on_redirect" address verification option. See
1698 NewStuff for rationale and an example.
1700 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1702 PH/02 Patch to exigrep to allow it to work on syslog lines.
1704 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1705 fread() to skip over the body file's header line, because in Cygwin the
1706 header line is locked and is inaccessible.
1708 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1709 co-exist for some time) to make it clear that it is the Exim ID that is
1710 referenced, not the Message-ID: header line.
1712 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1713 string_format() function, because snprintf() does not exist on all
1716 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1717 ${stat: expansion item.
1719 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1720 protocol synchronization error", to keep the pedants happy.
1722 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1723 well as for IRIX systems, when gcc is being used. See the host.c source
1726 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1728 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1731 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1732 transport and to the smtp transport in LMTP mode.
1734 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1736 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1737 run a filter in a subprocess. This could lead to confusion in subsequent
1738 lookups in the parent process. There should also be a search_tidyup() at
1739 the end of the subprocess.
1741 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1742 only if the host matched helo_try_verify_hosts, which caused the
1743 verification to occur when the EHLO/HELO command was issued. The ACL just
1744 tested the remembered result. Now, if a previous verification attempt has
1745 not happened, "verify = helo" does it there and then.
1747 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1749 TK/03 Fix log output including CR from clamd.
1751 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1752 exist provoked a memory error which could cause a segfault.
1754 PH/15 Installed PCRE 6.2
1756 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1758 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1759 of the problem. Specifically, suggested +O2 rather than +O1 for the
1762 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1764 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1765 record, the port was not correctly logged when the outgoing_port log
1766 selector was set (it logged the transort's default port).
1768 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1769 fallback_hosts, and "hosts" in the smtp transport.
1771 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1772 host errors such as "Connection refused".
1774 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1775 authentication with radiusclient 0.4.9:
1777 - Error returned from rc_read_config was caught wrongly
1778 - Username/password not passed on to radius server due to wrong length.
1780 The presumption is that some radiusclient API changes for 4.51/PH/17
1781 were not taken care of correctly. The code is still untested by me (my
1782 Linux distribution still has 0.3.2 of radiusclient), but it was
1783 contributed by a Radius user.
1785 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1786 expanding the "port" option of the smtp transport.
1788 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1789 while reading a MIME header. Thanks to Tom Hughes for a patch.
1791 PH/24 Include config.h inside local_scan.h so that configuration settings are
1794 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1795 that in an ACL for RCPT (for example), you can examine exactly what was
1798 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1799 commands, but it was not correctly comparing the address with the actual
1800 client host address. Thus, it would show the EHLO address in Received:
1801 header lines when this was not necessary.
1803 PH/27 Added the % operator to ${eval:}.
1805 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1806 it should be ignoring failures (because with -C, for example, it has lost
1807 privilege). It wasn't ignoring creation failures other than "already
1810 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1813 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1814 because an input line was too long, either on its own, or by virtue of
1815 too many continuations, the temporary file was not being removed, and the
1816 return code was incorrect.
1818 PH/31 Missing "BOOL" in function definition in filtertest.c.
1820 PH/32 Applied Sieve patches from the maintainer.
1822 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1824 PH/33 Added "verify = not_blind".
1826 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1827 Local/Makefile (with some defaults set). These are used in built scripts
1828 such as exicyclog, but they have never been used in the exim_install
1829 script (though there are many overriding facilities there). I have
1830 arranged that the exim_install script now takes note of these two
1833 PH/35 Installed configuration files for Dragonfly.
1835 PH/36 When a locally submitted message by a trusted user did not contain a
1836 From: header, and the sender address was obtained from -f or from an SMTP
1837 MAIL command, and the trusted user did not use -F to supply a sender
1838 name, $originator_name was incorrectly used when constructing a From:
1839 header. Furthermore, $originator_name was used for submission mode
1840 messages from external hosts without From: headers in a similar way,
1841 which is clearly wrong.
1843 PH/37 Added control=suppress_local_fixups.
1845 PH/38 When log_selector = +received_sender was set, and the addition of the
1846 sender made the log line's construction buffer exactly full, or one byte
1847 less than full, an overflow happened when the terminating "\n" was
1850 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1851 when the result of a list match is failure because a DNS lookup failed.
1853 PH/40 RM_COMMAND is now used in the building process.
1855 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1856 the "build-* directories that it finds.
1858 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1859 address in a domain literal was a prefix of an interface address.
1861 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1862 when verifying a sender address, unless rewrite_headers is false.
1864 PH/44 Wrote a long comment about why errors_to addresses are verified as
1865 recipients, not senders.
1867 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1868 the ratelimit ACL was added.
1870 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1872 PH/46 Added extra information about PostgreSQL errors to the error string.
1874 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1875 avoiding the need to install special zones in a real server. This is
1876 backwards compatible; if it can't find the fake resolver, it drops back.
1877 Thus, both old and new test suites can be run.
1879 TF/02 Added util/ratelimit.pl
1881 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1882 clock is set back in time.
1884 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1885 Candler <B.Candler@pobox.com>.
1887 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1888 OK for addresses that are the result of redirections.
1890 PH/48 A number of further additions for the benefit of the new test suite,
1891 including a fake gethostbyname() that interfaces to the fake DNS resolver
1894 TF/06 The fix for widen_domains has also been applied to qualify_single and
1895 search_parents which are the other dnslookup options that can cause
1898 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1901 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1903 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1904 service" if it encountered an MX record with an empty target hostname.
1905 The message is now "an MX or SRV record indicated no SMTP service".
1907 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1908 if the DNS of the sending site is misconfigured. This is quite a
1909 common situation. This change restores the behaviour of treating a
1910 helo verification defer as a failure.
1912 PH/51 If self=fail was set on a router, the bounce message did not include the
1913 actual error message.
1919 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1921 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1922 command itself ended in error, the underlying message about the transport
1923 filter timeout was being overwritten with the pipe command error. Now the
1924 underlying error message should be appended to the second error message.
1926 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1928 PH/02 Reduce the amount of output that "make" produces by default. Full output
1929 can still be requested.
1931 PH/03 The warning log line about a condition test deferring for a "warn" verb
1932 was being output only once per connection, rather than after each
1933 occurrence (because it was using the same function as for successful
1934 "warn" verbs). This seems wrong, so I have changed it.
1936 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1937 it should not have, which might have caused a crash in the right
1938 circumstances, but probably never did.
1940 PH/04 Installed a modified version of Tony Finch's patch to make submission
1941 mode fix the return path as well as the Sender: header line, and to
1942 add a /name= option so that you can make the user's friendly name appear
1945 TF/03 Added the control = fakedefer ACL modifier.
1947 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1948 Mark Lowes for thorough testing.
1950 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1952 TK/03 Merged latest SRS patch from Miles Wilton.
1954 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1955 with the definition in sysexits.h (which is #included earlier).
1956 Fortunately, Exim does not actually use EX_OK. The code used to try to
1957 preserve the sysexits.h value, by assumimg that macro definitions were
1958 scanned for macro replacements. I have been disabused of this notion,
1959 so now the code just undefines EX_OK before #including unistd.h.
1961 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1962 in the smtp transport. When a block could not be written in a single
1963 write() function, the timeout was being re-applied to each part-write.
1964 This seems wrong - if the receiver was accepting one byte at a time it
1965 would take for ever. The timeout is now adjusted when this happens. It
1966 doesn't have to be particularly precise.
1968 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1969 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1971 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1972 without a domain if the check to <postmaster@domain> fails.
1974 SC/01 Eximstats: added -xls and the ability to specify output files
1975 (patch written by Frank Heydlauf).
1977 SC/02 Eximstats: use FileHandles for outputing results.
1979 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1981 SC/04 Eximstats: fixed display of large numbers with -nvr option
1983 SC/05 Eximstats: fixed merging of reports with empty tables.
1985 SC/06 Eximstats: added the -include_original_destination flag
1987 SC/07 Eximstats: removed tabs and trailing whitespace.
1989 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1991 TK/06 MBOX spool code: Add real "From " MBOX separator line
1992 so the .eml file is really in mbox format (even though
1993 most programs do not really care). Patch from Alex Miller.
1995 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1996 The latter is generated from $received_to and is only set if the
1997 message has one envelope recipient. SA can use these headers,
1998 obviously out-of-the-box. Patch from Alex Miller.
2000 PH/08 The ${def test on a variable was returning false if the variable's
2001 value was "0", contrary to what the specification has always said!
2002 The result should be true unless the variable is empty.
2004 PH/09 The syntax error of a character other than { following "${if
2005 def:variable_name" (after optional whitespace) was not being diagnosed.
2006 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2007 accidental colon was present, for example, could give incorrect results.
2009 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2010 result is used (not including appendfile, where other changes are about
2013 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2014 This involved changing a lot of size variables from int to off_t. It
2015 should work with maildirs and everything.
2017 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2018 spamd dying while we are connected to it.
2020 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2023 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2024 function for BDB 4.3.
2026 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2028 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2029 the sources for PCRE have been re-arranged and more files are now
2032 PH/15 The code I had for printing potentially long long variables in PH/11
2033 above was not the best (it lost precision). The length of off_t variables
2034 is now inspected at build time, and an appropriate printing format (%ld
2035 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2036 to be "long long int" or "long int". This is needed for the internal
2037 formatting function string_vformat().
2039 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2040 the configuration file to be ":syslog", then the script "guesses" where
2041 the logs files are, rather than using the compiled in default. In our
2042 case the guess is not the same as the compiled default, so the script
2043 suddenly stopped working when I started to use syslog. The patch checks
2044 to see if log_file_path is "". If so, it attempts to read it from exim
2045 with no configuration file to get the compiled in version, before it
2046 falls back to the previous guessing code."
2048 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2049 implementing BATV in an Exim configuration. See NewStuff for the gory
2052 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2053 Makefile that are specific to HP-UX.
2055 PH/18 If the "use_postmaster" option was set for a recipient callout together
2056 with the "random" option, the postmaster address was used as the MAIL
2057 FROM address for the random test, but not for the subsequent recipient
2058 test. It is now used for both.
2060 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2061 patch removes a few documentation additions to RFC 3028, because the
2062 latest draft now contains them. It adds the new en;ascii-case comparator
2063 and a new error check for 8bit text in MIME parts. Comparator and
2064 require names are now matched exactly. I enabled the subaddress
2065 extension, but it is not well tested yet (read: it works for me)."
2067 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2068 rework some of the code of TK/09 above to avoid the hardwired use of
2069 "%lld" and "long long". Replaced the call to snprintf() with a call to
2072 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2073 records point to non-existent hosts", "retry timeout exceeded", and
2074 "retry time not reached for any host after a long failure period".
2076 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2077 experimental DomainKeys support:
2079 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2080 (2) On an error such as an illegally used "control", the wrong name for
2081 the control was given.
2083 These problems did NOT occur unless DomainKeys support was compiled.
2085 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2087 PH/24 Added ${if match_ip condition.
2089 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2090 databases so that it will be absolutely obvious if a crash occurs in the
2091 DB library. This is a regular occurrence (often caused by mis-matched
2094 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2095 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2096 picked up on a user's system that detects such things. There doesn't seem
2097 to be a gcc warning option for this - only an attribute that has to be
2098 put on the function's prototype. It seems that in Fedora Core 4 they have
2099 set this on a number of new functions. No doubt there will be more in due
2102 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2103 specify a transport. However, if an address that was verified by such a
2104 router was the subject of a callout, Exim crashed because it tried to
2105 read the rcpt_include_affixes from the non-existent transport. Now it
2106 just assumes that the setting of that option is false. This bug was
2107 introduced by 4.51/PH/31.
2109 PH/28 Changed -d+all to exclude +memory, because that information is very
2110 rarely of interest, but it makes the output a lot bigger. People tend to
2111 do -d+all out of habit.
2113 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2114 code in os-type was giving problems when libc.so lives in lib64, like on
2117 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2118 aren't the modern standard, and it seems that some systems' include files
2119 don't always have them. Exim was already checking for some of the newer
2120 ones like T_AAAA, and defining it itself. I've added checks for all the
2121 record types that Exim uses.
2123 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2124 not automatically generating a new one, as it is supposed to. This
2125 prevented TLS from working. If the file did exist, but contained invalid
2126 data, a new version was generated, as expected. It was only the case of a
2127 non-existent file that was broken.
2129 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2130 with a change in libdomainkeys > 0.64.
2132 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2133 from DNS. If the selector record carries the flag, it now has
2134 precedence over the domain-wide flag.
2136 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2138 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2139 the use of a port name that isn't defined in /etc/services) occurred, the
2140 message was deferred as in a normal delivery, and thus remained on the
2141 spool, instead of being failed because of the mua_wrapper setting. This
2142 is now fixed, and I tidied up some of the mua_wrapper messages at the
2145 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2146 the messages in a hash of arrays rather than using individual hashes.
2147 This is a bit cleaner and results in dramatic memory savings, albeit
2148 at a slight CPU cost.
2150 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2151 as requested by Marc Sherman.
2153 SC/10 Eximstats: added histograms for user specified patterns as requested
2156 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2158 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2159 fopen() in the content-scanning modules that did not already have it.
2165 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2166 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2168 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2170 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2172 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2173 to test Sieve filters that use "vacation".
2175 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2176 that changes the way the GnuTLS parameters are stored in the cache file.
2177 The new format can be generated externally. For backward compatibility,
2178 if the data in the cache doesn't make sense, Exim assumes it has read an
2179 old-format file, and it generates new data and writes a new file. This
2180 means that you can't go back to an older release without removing the
2183 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2184 work if there are any delivery delays because "one_time" forces the
2185 parent to be marked "delivered", so its unseen clone is never tried
2186 again. For this reason, Exim now forbids the simultaneous setting of
2189 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2190 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2191 entry if you want to know the details. The fix, however, neglected to
2192 consider the case when local delivery batching is involved. The test for
2193 "previously delivered" was not happening when checking to see if an
2194 address could be batched with a previous (undelivered) one; under
2195 certain circumstances this could lead to multiple deliveries to the same
2198 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2199 in its include files, and this causes problems building Exim.
2201 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2202 header_syntax) but Exim was just ignoring anything given after a slash.
2203 In particular, this caused confusion with an attempt to use "verify =
2204 reverse_host_lookup/defer_ok". An error is now given when options are
2205 supplied for verify items that do not have them. (Maybe reverse_host_
2206 lookup should have a defer_ok option, but that's a different point.)
2208 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2209 defined by RFC 821) to 2048, because there were problems with some AUTH
2210 commands, and RFC 1869 says the size should be increased for extended
2211 SMTP commands that take arguments.
2213 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2216 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2217 "unknown" error; now it says that the functionality isn't in the binary.
2219 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2220 an address' error message when a string expansion fails (syntax or
2221 whatever). Otherwise the password may appear in the log. Following change
2222 PH/42 below, there is no longer a chance of it appearing in a bounce
2225 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2227 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2228 of its addresses was ever tried. (Bugzilla bug #2.)
2230 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2231 the result incorrectly in the debug output. (It correctly added a newline
2232 to what was transported.)
2234 TF/01 Added $received_time.
2236 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2237 commented out examples of how to interface to a virus scanner and to
2238 SpamAssassin. Also added commented examples of av_scanner and
2239 spamd_address settings.
2241 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2242 and controls are allowed in which ACLs. There were a couple of minor
2243 errors. Some of the entries in the conditions table (which is a table of
2244 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2245 negation of where the condition IS allowed.
2247 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2249 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2250 header file does not have a version number, so I've had to invent a new
2251 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2252 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2253 radiusclient), but it was contributed by a Radius user.
2255 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2256 files or directories, for OpenSSL.
2258 PH/19 When an Exim process that is running as root has to create an Exim log
2259 file, it does so in a subprocess that runs as exim:exim so as to get the
2260 ownership right at creation (otherwise, other Exim processes might see
2261 the file with the wrong ownership). There was no test for failure of this
2262 fork() call, which would lead to the process getting stuck as it waited
2263 for a non-existent subprocess. Forks do occasionally fail when resources
2264 run out. I reviewed all the other calls to fork(); they all seem to check
2267 PH/20 When checking for unexpected SMTP input at connect time (before writing
2268 the banner), Exim was not dealing correctly with a non-positive return
2269 from the read() function. If the client had disconnected by this time,
2270 the result was a log entry for a synchronization error with an empty
2271 string after "input=" when read() returned zero. If read() returned -1
2272 (an event I could not check), uninitialized data bytes were printed.
2273 There were reports of junk text (parts of files, etc) appearing after
2276 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2278 PH/22 Added support for macro redefinition, and (re)definition in between
2279 driver and ACL definitions.
2281 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2282 forgetting to use the resulting value; it was using the unexpanded value.
2284 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2285 hadn't been configured. The fix is from Juergen Kreileder, who
2286 understands it better than I do:
2288 "Here's what I see happening with three configured cyrus_sasl
2289 authenticators configured (plain, login, cram-md5):
2291 On startup auth_cyrus_sasl_init() gets called for each of these.
2292 This means three calls to sasl_listmech() without a specified mech_list.
2293 => SASL tests which mechs of all available mechs actually work
2294 => three warnings about OTP not working
2295 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2297 With the patch, sasl_listmech() also gets called three times. But now
2298 SASL's mech_list option is set to the server_mech specified in the the
2299 authenticator. Or in other words, the answer from sasl_listmech()
2300 gets limited to just the mech you're testing for (which is different
2302 => the return list contains just 'plain' or 'login', 'cram-md5' or
2303 nothing depending on the value of ob->server_mech.
2305 I've just tested the patch: Authentication still works fine,
2306 unavailable mechs specified in the exim configuration are still
2307 caught, and the auth.log warnings about OTP are gone."
2309 PH/25 When debugging is enabled, the contents of the command line are added
2310 to the debugging output, even when log_selector=+arguments is not
2313 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2314 answer is "GNU", and only if the return is "GNU/something" is the answer
2317 PH/27 $acl_verify_message is now set immediately after the failure of a
2318 verification in an ACL, and so is available in subsequent modifiers. In
2319 particular, the message can be preserved by coding like this:
2321 warn !verify = sender
2322 set acl_m0 = $acl_verify_message
2324 Previously, $acl_verify_message was set only while expanding "message"
2325 and "log_message" when a very denied access.
2327 PH/28 Modified OS/os.c-Linux with
2329 -#ifndef OS_LOAD_AVERAGE
2330 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2332 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2333 nomenclature these days.)
2335 PH/29 Installed patch from the Sieve maintainer that adds the options
2336 sieve_useraddress and sieve_subaddress to the redirect router.
2338 PH/30 In these circumstances:
2339 . Two addresses routed to the same list of hosts;
2340 . First host does not offer TLS;
2341 . First host accepts first address;
2342 . First host gives temporary error to second address;
2343 . Second host offers TLS and a TLS session is established;
2344 . Second host accepts second address.
2345 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2346 and peerdn, if requested) that were in fact used only for the second
2349 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2350 attention to any local part prefix or suffix that was matched by the
2351 router that accepted the address. It now behaves in the same way as it
2352 does for delivery: the affixes are removed from the local part unless
2353 rcpt_include_affixes is set on the transport.
2355 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2356 timeout during the DATA phase of an incoming message.
2358 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2359 applied a patch sanctioned by the Sieve maintainer.
2361 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2362 the uid or gid is negative. A case of a negative gid caused this to be
2363 noticed. The fix allows for either to be negative.
2365 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2366 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2369 PH/36 The change PH/12 above was broken. Fixed it.
2371 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2372 the grounds that routing the same address twice would always produce the
2373 same answer. This might have been true once, but it is certainly no
2374 longer true now. Routing a child address may depend on the previous
2375 routing that produced that child. Some complicated redirection strategies
2376 went wrong when messages had multiple recipients, and made Exim's
2377 behaviour dependent on the order in which the addresses were given.
2379 I have moved the duplicate checking until after the routing is complete.
2380 Exim scans the addresses that are assigned to local and remote
2381 transports, and removes any duplicates. This means that more work will be
2382 done, as duplicates will always all be routed, but duplicates are
2383 presumably rare, so I don't expect this is of any significance.
2385 For deliveries to pipes, files, and autoreplies, the duplicate checking
2386 still happens during the routing process, since they are not going to be
2389 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2390 It corrects a timeout issue with spamd. This is Ian's comment: "The
2391 background is that sometimes spamd either never reads data from a
2392 connection it has accepted, or it never writes response data. The exiscan
2393 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2394 blindly assumes that writes won't block so it may never time out."
2396 PH/39 Allow G after quota size as well as K and M.
2398 PH/40 The value set for $authenticated_id in an authenticator may not contain
2399 binary zeroes or newlines because the value is written to log lines and
2400 to spool files. There was no check on this. Now the value is run through
2401 the string_printing() function so that such characters are converted to
2402 printable escape sequences.
2404 PH/41 $message_linecount is a new variable that contains the total number of
2405 lines in the message. Compare $body_linecount, which is the count for the
2408 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2409 bounce and delay warning messages, except in certain special cases, which
2412 (a) An SMTP error message from a remote host;
2413 (b) A message specified in a :fail: redirection;
2414 (c) A message specified in a "fail" command in a system filter;
2415 (d) A message specified in a FAIL return from the queryprogram router;
2416 (e) A message specified by the cannot_route_message router option.
2418 In these cases only, Exim does include the error details in bounce and
2419 warning messages. There are also a few cases where bland messages such
2420 as "unrouteable address" or "local delivery error" are given.
2422 PH/43 $value is now also set for the "else" part of a ${run expansion.
2424 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2425 being worked on, but at least Exim now implements the latest version to
2428 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2429 process to complete was treated as a delivery failure, a timeout while
2430 writing the message to the pipe was logged, but erroneously treated as a
2431 successful delivery. Such timeouts include transport filter timeouts. For
2432 consistency with the overall process timeout, these timeouts are now
2433 treated as errors, giving rise to delivery failures by default. However,
2434 there is now a new Boolean option for the pipe transport called
2435 timeout_defer, which, if set TRUE, converts the failures into defers for
2436 both kinds of timeout. A transport filter timeout is now identified in
2439 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2440 systems where "make" and "gmake" are different, calling "gmake" at top
2441 level broke things. I've arranged for the value of $(MAKE) to be passed
2442 from the Makefile to this script so that it can call the same version of
2446 A note about Exim versions 4.44 and 4.50
2447 ----------------------------------------
2449 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2450 changes of various kinds. As a consequence, a big documentation update was
2451 needed. This delayed the release for rather longer than seemed good, especially
2452 in the light of a couple of (minor) security issues. Therefore, the changes
2453 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2454 release. So 4.44 and 4.50 are in effect two different branches that both start
2457 I have left the 4.50 change log unchanged; it contains all the changes since
2458 4.43. The change log for 4.44 is below; many of its items are identical to
2459 those for 4.50. This seems to be the most sensible way to preserve the
2460 historical information.
2466 1. Minor wording change to the doc/README.SIEVE file.
2468 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2469 computation of the current number of files was incorrect.
2471 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2472 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2475 4. Give more explanation in the error message when the command for a transport
2476 filter fails to execute.
2478 5. There are several places where Exim runs a non-Exim command in a
2479 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2480 was being done only for the command run by the queryprogram router. It is
2481 now done for all such subprocesses. The other cases are: ${run, transport
2482 filters, and the commands run by the lmtp and pipe transports.
2484 6. Added CONFIGURE_GROUP build-time option.
2486 7. Some older OS have a limit of 256 on the maximum number of file
2487 descriptors. Exim was using setrlimit() to set 1000 as a large value
2488 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2489 systems. I've change it so that if it can't get 1000, it tries for 256.
2491 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2492 was an oversight, and furthermore, ever since the addition of extra
2493 controls (e.g. 4.43/32), the checks on when to allow different forms of
2494 "control" were broken. There should now be diagnostics for all cases when a
2495 control that does not make sense is encountered.
2497 9. Added the /retain_sender option to "control=submission".
2499 10. $recipients is now available in the predata ACL (oversight).
2501 11. Tidy the search cache before the fork to do a delivery from a message
2502 received from the command line. Otherwise the child will trigger a lookup
2503 failure and thereby defer the delivery if it tries to use (for example) a
2504 cached ldap connection that the parent has called unbind on.
2506 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2507 of $address_data from the recipient verification was clobbered by the
2508 sender verification.
2510 13. The value of address_data from a sender verification is now available in
2511 $sender_address_data in subsequent conditions in the ACL statement.
2513 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2515 15. Added a new option "connect=<time>" to callout options, to set a different
2518 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2519 was its contents. (It was OK if the option was not defined at all.)
2521 17. A "Completed" log line is now written for messages that are removed from
2522 the spool by the -Mrm option.
2524 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2525 information about exactly what failed.
2527 19. Added -dd to debug only the daemon process.
2529 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2530 handles timeouts, both on the server side and network timeouts. Renamed the
2531 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2533 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2534 It is now set to "smtps".
2536 22. $host_address is now set to the target address during the checking of
2537 ignore_target_hosts.
2539 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2540 being passed; this would have caused $sender_host_name to have been used if
2541 matching the list had actually called for a host name (not very likely,
2542 since this list is usually IP addresses). A host name is now passed as
2545 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2546 code that specifies a non-restarting handler (typically sigaction() in
2547 modern systems) in an attempt to fix a rare and obscure crash bug.
2549 25. Narrowed the window for a race in the daemon that could cause it to ignore
2550 SIGCHLD signals. This is not a major problem, because they are used only to
2551 wake it up if nothing else does.
2553 26. A malformed maildirsize file could cause Exim to calculate negative values
2554 for the mailbox size or file count. Odd effects could occur as a result.
2555 The maildirsize information is now recalculated if the size or filecount
2558 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2559 support for a long time. Removed HAVE_SYS_VFS_H.
2561 28. Installed the latest version of exipick from John Jetmore.
2563 29. In an address list, if the pattern was not a regular expression, an empty
2564 subject address (from a bounce message) matched only if the pattern was an
2565 empty string. Non-empty patterns were not even tested. This was the wrong
2566 because it is perfectly reasonable to use an empty address as part of a
2567 database query. An empty address is now tested by patterns that are
2568 lookups. However, all the other forms of pattern expect the subject to
2569 contain a local part and a domain, and therefore, for them, an empty
2570 address still always fails if the pattern is not itself empty.
2572 30. Exim went into a mad DNS loop when attempting to do a callout where the
2573 host was specified on an smtp transport, and looking it up yielded more
2574 than one IP address.
2576 31. Re-factored the code for checking spool and log partition space into a
2577 function that finds that data and another that does the check. The former
2578 is then used to implement four new variables: $spool_space, $log_space,
2579 $spool_inodes, and $log_inodes.
2581 32. The RFC2047 encoding function was originally intended for short strings
2582 such as real names; it was not keeping to the 75-character limit for
2583 encoded words that the RFC imposes. It now respects the limit, and
2584 generates multiple encoded words if necessary. To be on the safe side, I
2585 have increased the buffer size for the ${rfc2047: expansion operator from
2588 33. It is now permitted to omit both strings after an "if" condition; if the
2589 condition is true, the result is "true". As before, when the second string
2590 is omitted, a false condition yields an empty string. This makes it less
2591 cumbersome to write custom ACL and router conditions.
2593 34. Failure to deliver a bounce message always caused it to be frozen, even if
2594 there was an errors_to setting on the router. The errors_to setting is now
2597 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2598 canonical form (fully expanded) before being placed in
2599 $sender_host_address.
2601 36. The table in the code that translates DNS record types into text (T_A to
2602 "A" for instance) was missing entries for NS and CNAME. It is just possible
2603 that this could have caused confusion if both these types were looked up
2604 for the same domain, because the text type is used as part of Exim's
2605 per-process caching. But the chance of anyone hitting this buglet seems
2608 37. The dnsdb lookup has been extended in a number of ways.
2610 (1) There is a new type, "zns", which walks up the domain tree until it
2611 finds some nameserver records. It should be used with care.
2613 (2) There is a new type, "mxh", which is like "mx" except that it returns
2614 just the host names, not the priorities.
2616 (3) It is now possible to give a list of domains (or IP addresses) to be
2617 looked up. The behaviour when one of the lookups defers can be
2618 controlled by a keyword.
2620 (4) It is now possible to specify the separator character for use when
2621 multiple records are returned.
2623 38. The dnslists ACL condition has been extended: it is now possible to supply
2624 a list of IP addresses and/or domains to be looked up in a particular DNS
2627 39. Added log_selector=+queue_time_overall.
2629 40. When running the queue in the test harness, wait just a tad after forking a
2630 delivery process, to get repeatability of debugging output.
2632 41. Include certificate and key file names in error message when GnuTLS fails
2633 to set them up, because the GnuTLS error message doesn't include the name
2634 of the failing file when there is a problem reading it.
2636 42. Allow both -bf and -bF in the same test run.
2638 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2640 44. The "Exiscan patch" is now merged into the mainline Exim source.
2642 45. Sometimes the final signoff response after QUIT could fail to get
2643 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2644 < 0 before doing a fflush(). This bug looks as though it goes back to the
2645 introduction of TLS in release 3.20, but "sometimes" must have been rare
2646 because the tests only now provoked it.
2648 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2649 (this can affect the format of dates).
2651 47. exim_tidydb, when checking for the continued existence of a message for
2652 which it has found a message-specific retry record, was not finding
2653 messages that were in split spool directories. Consequently, it was
2654 deleting retry records that should have stayed in existence.
2656 48. Steve fixed some bugs in eximstats.
2658 49. The SPA authentication driver was not abandoning authentication and moving
2659 on to the next authenticator when an expansion was forced to fail,
2660 contradicting the general specification for all authenticators. Instead it
2661 was generating a temporary error. It now behaves as specified.
2663 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2664 (the order specifies the preference for clients). The order is now AES256,
2665 AES128, 3DES, ARCFOUR128.
2667 51. Small patch to Sieve code - explicitly set From: when generating an
2670 52. Exim crashed if a remote delivery caused a very long error message to be
2671 recorded - for instance if somebody sent an entire SpamAssassin report back
2672 as a large number of 550 error lines. This bug was coincidentally fixed by
2673 increasing the size of one of Exim's internal buffers (big_buffer) that
2674 happened as part of the Exiscan merge. However, to be on the safe side, I
2675 have made the code more robust (and fixed the comments that describe what
2678 53. Now that there can be additional text after "Completed" in log lines (if
2679 the queue_time_overall log selector is set), a one-byte patch to exigrep
2680 was needed to allow it to recognize "Completed" as not the last thing in
2683 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2684 patch that reportedly fixes this has been added. I am not expert enough to
2685 create a test for it. This is what the patch creator wrote:
2687 "I found a little strange behaviour of ldap code when working with
2688 Windows 2003 AD Domain, where users was placed in more than one
2689 Organization Units. When I tried to give exim partial DN, the exit code
2690 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2691 But simultaneously result of request was absolutely normal ldap result,
2692 so I produce this patch..."
2694 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2695 REFERENCE, so I have modified the code to exclude the patch when that macro
2698 55. Some experimental protocols are using DNS PTR records for new purposes. The
2699 keys for these records are domain names, not reversed IP addresses. The
2700 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2701 leaves it alone. Component reversal etc. now happens only for IP addresses.
2704 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2706 57. Double the size of the debug message buffer (to 2048) so that more of very
2707 long debug lines gets shown.
2709 58. The exicyclog utility now does better if the number of log files to keep
2710 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2712 59. Two changes related to the smtp_active_hostname option:
2714 (1) $smtp_active_hostname is now available as a variable.
2715 (2) The default for smtp_banner uses $smtp_active_hostname instead
2716 of $primary_hostname.
2718 60. The host_aton() function is supposed to be passed a string that is known
2719 to be a valid IP address. However, in the case of IPv6 addresses, it was
2720 not checking this. This is a hostage to fortune. Exim now panics and dies
2721 if the condition is not met. A case was found where this could be provoked
2722 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2723 components; fortuitously, this particular loophole had already been fixed
2724 by change 4.50/55 above.
2726 If there are any other similar loopholes, the new check in host_aton()
2727 itself should stop them being exploited. The report I received stated that
2728 data on the command line could provoke the exploit when Exim was running as
2729 exim, but did not say which command line option was involved. All I could
2730 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2731 running as the user.
2734 61. There was a buffer overflow vulnerability in the SPA authentication code
2735 (which came originally from the Samba project). I have added a test to the
2736 spa_base64_to_bits() function which I hope fixes it.
2739 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2740 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2742 63. The daemon start-up calls getloadavg() while still root for those OS that
2743 need the first call to be done as root, but it missed one case: when
2744 deliver_queue_load_max is set with deliver_drop_privilege. This is
2745 necessary for the benefit of the queue runner, because there is no re-exec
2746 when deliver_drop_privilege is set.
2748 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2749 This has been fixed.
2751 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2752 was in use, was not putting the data itself into the right store pool;
2753 consequently, it could be overwritten for a subsequent message in the same
2754 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2757 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2759 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2760 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2761 the function were treating the return as a boolean value, which happened to
2762 work because 0=false and not-0=true, but is not correct code.
2764 68. The host_aton() function was not handling scoped IPv6 addresses (those
2765 with, for example, "%eth0" on the end) correctly.
2767 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2768 negated items (that is, ~something) in unsigned ints. Some compilers
2769 apparently mutter when there is no cast.
2771 70. If an address verification called from an ACL failed, and did not produce a
2772 user-specific message (i.e. there was only a "system" message), nothing was
2773 put in $acl_verify_message. In this situation, it now puts the system
2776 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2777 session; change 4.31/43 added the unwanted input to the log line - except
2778 that it did not do this in the start of session case. It now does.
2780 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2781 This is wrong and can cause the other end to generate a synchronization
2782 error if it is another Exim or anything else that does the synchronization
2783 check. A QUIT command is no longer sent after a timeout.
2785 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2786 during host lookups.
2788 74. The defer_ok option of callout verification was not working if it was used
2789 when verifying addresses in header lines, that is, for this case:
2791 verify = header_sender/callout=defer_ok
2793 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2794 those file descriptors could be used for SMTP connections. If anything
2795 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2796 could be sent to the SMTP client, causing chaos. The daemon now opens
2797 stdin, stdout, and stderr to /dev/null when it puts itself into the
2800 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2801 log by default. The user can override this with suitable Perl magic.
2803 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2804 the log message when discard triggers, was not working for the DATA ACL or
2805 for the non-SMTP ACL.
2807 78. Error message wording change in sieve.c.
2809 79. If smtp_accept_max_per_host was set, the number of connections could be
2810 restricted to fewer than expected, because the daemon was trying to set up
2811 a new connection before checking whether the processes handling previous
2812 connections had finished. The check for completed processes is now done
2813 earlier. On busy systems, this bug wouldn't be noticed because something
2814 else would have woken the daemon, and it would have reaped the completed
2817 80. If a message was submitted locally by a user whose login name contained one
2818 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2819 It caused a spool format error. I have fixed the spool reading code. A
2820 related problem was that the "from" clause in the Received: line became
2821 illegal because of the space(s). It is now covered by ${quote_local_part.
2823 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2826 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2828 83. Patch from Sieve maintainer to fix unterminated string problem in
2829 "vacation" handling.
2831 84. Some minor changes to the Linux configuration files to help with other
2832 OS variants using glibc.
2834 85. One more patch for Sieve to update vacation handling to latest spec.
2837 ----------------------------------------------------
2838 See the note above about the 4.44 and 4.50 releases.
2839 ----------------------------------------------------
2845 1. Change 4.43/35 introduced a bug that caused file counts to be
2846 incorrectly computed when quota_filecount was set in an appendfile
2849 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2850 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2853 3. Give more explanation in the error message when the command for a transport
2854 filter fails to execute.
2856 4. There are several places where Exim runs a non-Exim command in a
2857 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2858 was being done only for the command run by the queryprogram router. It is
2859 now done for all such subprocesses. The other cases are: ${run, transport
2860 filters, and the commands run by the lmtp and pipe transports.
2862 5. Some older OS have a limit of 256 on the maximum number of file
2863 descriptors. Exim was using setrlimit() to set 1000 as a large value
2864 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2865 systems. I've change it so that if it can't get 1000, it tries for 256.
2867 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2868 was an oversight, and furthermore, ever since the addition of extra
2869 controls (e.g. 4.43/32), the checks on when to allow different forms of
2870 "control" were broken. There should now be diagnostics for all cases when a
2871 control that does not make sense is encountered.
2873 7. $recipients is now available in the predata ACL (oversight).
2875 8. Tidy the search cache before the fork to do a delivery from a message
2876 received from the command line. Otherwise the child will trigger a lookup
2877 failure and thereby defer the delivery if it tries to use (for example) a
2878 cached ldap connection that the parent has called unbind on.
2880 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2881 of $address_data from the recipient verification was clobbered by the
2882 sender verification.
2884 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2885 was its contents. (It was OK if the option was not defined at all.)
2887 11. A "Completed" log line is now written for messages that are removed from
2888 the spool by the -Mrm option.
2890 12. $host_address is now set to the target address during the checking of
2891 ignore_target_hosts.
2893 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2894 being passed; this would have caused $sender_host_name to have been used if
2895 matching the list had actually called for a host name (not very likely,
2896 since this list is usually IP addresses). A host name is now passed as
2899 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2900 code that specifies a non-restarting handler (typically sigaction() in
2901 modern systems) in an attempt to fix a rare and obscure crash bug.
2903 15. Narrowed the window for a race in the daemon that could cause it to ignore
2904 SIGCHLD signals. This is not a major problem, because they are used only to
2905 wake it up if nothing else does.
2907 16. A malformed maildirsize file could cause Exim to calculate negative values
2908 for the mailbox size or file count. Odd effects could occur as a result.
2909 The maildirsize information is now recalculated if the size or filecount
2912 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2913 support for a long time. Removed HAVE_SYS_VFS_H.
2915 18. Updated exipick to current release from John Jetmore.
2917 19. Allow an empty sender to be matched against a lookup in an address list.
2918 Previously the only cases considered were a regular expression, or an
2921 20. Exim went into a mad DNS lookup loop when doing a callout where the
2922 host was specified on the transport, if the DNS lookup yielded more than
2925 21. The RFC2047 encoding function was originally intended for short strings
2926 such as real names; it was not keeping to the 75-character limit for
2927 encoded words that the RFC imposes. It now respects the limit, and
2928 generates multiple encoded words if necessary. To be on the safe side, I
2929 have increased the buffer size for the ${rfc2047: expansion operator from
2932 22. Failure to deliver a bounce message always caused it to be frozen, even if
2933 there was an errors_to setting on the router. The errors_to setting is now
2936 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2937 canonical form (fully expanded) before being placed in
2938 $sender_host_address.
2940 24. Updated eximstats to version 1.33
2942 25. Include certificate and key file names in error message when GnuTLS fails
2943 to set them up, because the GnuTLS error message doesn't include the name
2944 of the failing file when there is a problem reading it.
2946 26. Expand error message when OpenSSL has problems setting up cert/key files.
2949 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2950 (this can affect the format of dates).
2952 28. exim_tidydb, when checking for the continued existence of a message for
2953 which it has found a message-specific retry record, was not finding
2954 messages that were in split spool directories. Consequently, it was
2955 deleting retry records that should have stayed in existence.
2957 29. eximstats updated to version 1.35
2958 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2959 1.35 - bugfix such that pie charts by volume are generated correctly
2961 30. The SPA authentication driver was not abandoning authentication and moving
2962 on to the next authenticator when an expansion was forced to fail,
2963 contradicting the general specification for all authenticators. Instead it
2964 was generating a temporary error. It now behaves as specified.
2966 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2967 (the order specifies the preference for clients). The order is now AES256,
2968 AES128, 3DES, ARCFOUR128.
2970 31. Small patch to Sieve code - explicitly set From: when generating an
2973 32. Exim crashed if a remote delivery caused a very long error message to be
2974 recorded - for instance if somebody sent an entire SpamAssassin report back
2975 as a large number of 550 error lines. This bug was coincidentally fixed by
2976 increasing the size of one of Exim's internal buffers (big_buffer) that
2977 happened as part of the Exiscan merge. However, to be on the safe side, I
2978 have made the code more robust (and fixed the comments that describe what
2981 33. Some experimental protocols are using DNS PTR records for new purposes. The
2982 keys for these records are domain names, not reversed IP addresses. The
2983 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2984 leaves it alone. Component reversal etc. now happens only for IP addresses.
2987 34. The host_aton() function is supposed to be passed a string that is known
2988 to be a valid IP address. However, in the case of IPv6 addresses, it was
2989 not checking this. This is a hostage to fortune. Exim now panics and dies
2990 if the condition is not met. A case was found where this could be provoked
2991 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2992 components; fortuitously, this particular loophole had already been fixed
2993 by change 4.50/55 or 4.44/33 above.
2995 If there are any other similar loopholes, the new check in host_aton()
2996 itself should stop them being exploited. The report I received stated that
2997 data on the command line could provoke the exploit when Exim was running as
2998 exim, but did not say which command line option was involved. All I could
2999 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3000 running as the user.
3003 35. There was a buffer overflow vulnerability in the SPA authentication code
3004 (which came originally from the Samba project). I have added a test to the
3005 spa_base64_to_bits() function which I hope fixes it.
3008 36. The daemon start-up calls getloadavg() while still root for those OS that
3009 need the first call to be done as root, but it missed one case: when
3010 deliver_queue_load_max is set with deliver_drop_privilege. This is
3011 necessary for the benefit of the queue runner, because there is no re-exec
3012 when deliver_drop_privilege is set.
3014 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3015 was in use, was not putting the data itself into the right store pool;
3016 consequently, it could be overwritten for a subsequent message in the same
3017 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3020 38. Sometimes the final signoff response after QUIT could fail to get
3021 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3022 < 0 before doing a fflush(). This bug looks as though it goes back to the
3023 introduction of TLS in release 3.20, but "sometimes" must have been rare
3024 because the tests only now provoked it.
3030 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3031 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3032 Now it returns an integer. A number of calls were still expecting a T/F
3033 return. Fortuitously, in all cases, the tests worked in OK situations,
3034 which is the norm. However, things would have gone wrong on any write
3035 failures on the smtp file descriptor. This function is used when sending
3036 messages over SMTP and also when doing verify callouts.
3038 2. When Exim is called to do synchronous delivery of a locally submitted
3039 message (the -odf or -odi options), it no longer closes stderr before doing
3042 3. Implemented the mua_wrapper option.
3044 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3046 5. Implemented the functions header_remove(), header_testname(),
3047 header_add_at_position(), and receive_remove_recipient(), and exported them
3050 6. If an ACL "warn" statement specified the addition of headers, Exim already
3051 inserted X-ACL-Warn: at the start if there was no header name. However, it
3052 was not making this test for the second and subsequent header lines if
3053 there were newlines in the string. This meant that an invalid header could
3054 be inserted if Exim was badly configured.
3056 7. Allow an ACL "warn" statement to add header lines at the start or after all
3057 the Received: headers, as well as at the end.
3059 8. Added the rcpt_4xx retry error code.
3061 9. Added postmaster_mailfrom=xxx to callout verification option.
3063 10. Added mailfrom=xxxx to the callout verification option, for verify=
3066 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3067 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3069 12. Inserted some casts to stop certain compilers warning when using pointer
3070 differences as field lengths or precisions in printf-type calls (mostly
3071 affecting debugging statements).
3073 13. Added optional readline() support for -be (dynamically loaded).
3075 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3076 same clock tick as a message's arrival, so that its received time was the
3077 same as the "first fail" time on the retry record, and that message
3078 remained on the queue past the ultimate address timeout, every queue runner
3079 would try a delivery (because it was past the ultimate address timeout) but
3080 after another failure, the ultimate address timeout, which should have then
3081 bounced the address, did not kick in. This was a "< instead of <=" error;
3082 in most cases the first failure would have been in the next clock tick
3083 after the received time, and all would be well.
3085 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3086 being recognized when the domain list was tested by the match_domain
3087 condition in an expansion string.
3089 16. Added the ${str2b64: operator.
3091 17. Exim was always calling setrlimit() to set a large limit for the number of
3092 processes, without checking whether the existing limit was already
3093 adequate. (It did check for the limit on file descriptors.) Furthermore,
3094 errors from getrlimit() and setrlimit() were being ignored. Now they are
3095 logged to the main and panic logs, but Exim does carry on, to try to do its
3096 job under whatever limits there are.
3098 18. Imported PCRE 5.0.
3100 19. Trivial typo in log message " temporarily refused connection" (the leading
3103 20. If the log selector return_path_on_delivery was set and an address was
3104 redirected to /dev/null, the delivery process crashed because it assumed
3105 that a return path would always be set for a "successful" delivery. In this
3106 case, the whole delivery is bypassed as an optimization, and therefore no
3109 21. Internal re-arrangement: the function for sending a challenge and reading
3110 a response while authentication was assuming a zero-terminated challenge
3111 string. It's now changed to take a pointer and a length, to allow for
3112 binary data in such strings.
3114 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3116 23. Exim was not respecting finduser_retries when seeking the login of the
3117 uid under which it was called; it was always trying 10 times. (The default
3118 setting of finduser_retries is zero.) Also, it was sleeping after the final
3119 failure, which is pointless.
3121 24. Implemented tls_on_connect_ports.
3123 25. Implemented acl_smtp_predata.
3125 26. If the domain in control=submission is set empty, Exim assumes that the
3126 authenticated id is a complete email address when it generates From: or
3127 Sender: header lines.
3129 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3130 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3131 chown and chgrp in /bin and hostname in /usr/bin.
3133 28. Exim was keeping the "process log" file open after each use, just as it
3134 does for the main log. This opens the possibility of it remaining open for
3135 long periods when the USR1 signal hits a daemon. Occasional processlog
3136 errors were reported, that could have been caused by this. Anyway, it seems
3137 much more sensible not to leave this file open at all, so that is what now
3140 29. The long-running daemon process does not normally write to the log once it
3141 has entered its main loop, and it closes the log before doing so. This is
3142 so that log files can straightforwardly be renamed and moved. However,
3143 there are a couple of unusual error situations where the daemon does write
3144 log entries, and I had neglected to close the log afterwards.
3146 30. The text of an SMTP error response that was received during a remote
3147 delivery was being truncated at 512 bytes. This is too short for some of
3148 the long messages that one sometimes sees. I've increased the limit to
3151 31. It is now possible to make retry rules that apply only when a message has a
3152 specific sender, in particular, an empty sender.
3154 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3155 it possible to be selective about when SMTP synchronization is enforced.
3157 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3159 32. Implemented hosts_connection_nolog.
3161 33. Added an ACL for QUIT.
3163 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3166 35. Added mailbox_size and mailbox_filecount to appendfile.
3168 36. Added control = no_multiline_responses to ACLs.
3170 37. There was a bug in the logic of the code that waits for the clock to tick
3171 in the case where the clock went backwards by a substantial amount such
3172 that the microsecond fraction of "now" was more than the microsecond
3173 fraction of "then" (but the whole seconds number was less).
3175 38. Added support for the libradius Radius client library this is found on
3176 FreeBSD (previously only the radiusclient library was supported).
3182 1. When certain lookups returned multiple values in the form name=value, the
3183 quoting of the values was not always being done properly. Specifically:
3184 (a) If the value started with a double quote, but contained no whitespace,
3186 (b) If the value contained whitespace other than a space character (i.e.
3187 tabs or newlines or carriage returns) it was not quoted.
3188 This fix has been applied to the mysql and pgsql lookups by writing a
3189 separate quoting function and calling it from the lookup code. The fix
3190 should probably also be applied to nisplus, ibase and oracle lookups, but
3191 since I cannot test any of those, I have not disturbed their existing code.
3193 2. A hit in the callout cache for a specific address caused a log line with no
3194 reason for rejecting RCPT. Now it says "Previous (cached) callout
3195 verification failure".
3197 3. There was an off-by-one bug in the queryprogram router. An over-long
3198 return line was truncated at 256 instead of 255 characters, thereby
3199 overflowing its buffer with the terminating zero. As well as fixing this, I
3200 have increased the buffer size to 1024 (and made a note to document this).
3202 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3203 when Exim is waiting for an SMTP response from a remote server, Exim
3204 restarts its select() call on the socket, thereby resetting its timeout.
3205 This is not a problem when such interrupts are rare. Somebody set up a cron
3206 job to run exiwhat every 2 minutes, which is less than the normal select()
3207 timeout (5 or 10 minutes). This meant that the select() timeout never
3208 kicked in because it was always reset. I have fixed this by comparing the
3209 time when an interrupt arrives with the time at the start of the first call
3210 to select(). If more time than the timeout has elapsed, the interrupt is
3211 treated as a timeout.
3213 5. Some internal re-factoring in preparation for the addition of Sieve
3214 extensions (by MH). In particular, the "personal" test is moved to a
3215 separate function, and given an option for scanning Cc: and Bcc: (which is
3216 not set for Exim filters).
3218 6. When Exim created an email address using the login of the caller as the
3219 local part (e.g. when creating a From: or Sender: header line), it was not
3220 quoting the local part when it contained special characters such as @.
3222 7. Installed new OpenBSD configuration files.
3224 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3225 try to make them clearer.
3227 9. Callout options, other than the timeout value, were being ignored when
3228 verifying sender addresses in header lines. For example, when using
3230 verify = header_sender/callout=no_cache
3232 the cache was (incorrectly) being used.
3234 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3235 only the Cygwin environment.
3237 11. When return_path_on_delivery was set as a log selector, if different remote
3238 addresses in the same message used different return paths and parallel
3239 remote delivery occurred, the wrong values would sometimes be logged.
3240 (Whenever a remote delivery process finished, the return path value from
3241 the most recently started remote delivery process was logged.)
3243 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3244 lines when AUTH and/or TLS are in use. This is the "received protocol"
3245 field. Exim used to use "asmtp" for authenticated SMTP, without any
3246 indication (in the protocol name) for TLS use. Now it follows the RFC and
3247 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3248 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3249 names appear in log lines as well as in Received: header lines.
3251 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3252 extensions, and comparison tests, and to fix some bugs.
3254 14. Changes to the "personal" filter test:
3256 (1) The test was buggy in that it was just doing the equivalent of
3257 "contains" tests on header lines. For example, if a user's address was
3258 anne@some.where, the "personal" test would incorrectly be true for
3260 To: susanne@some.where
3262 This test is now done by extracting each address from the header in turn,
3263 and checking the entire address. Other tests that are part of "personal"
3264 are now done using regular expressions (for example, to check local parts
3265 of addresses in From: header lines).
3267 (2) The list of non-personal local parts in From: addresses has been
3268 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3269 taken from the Sieve specification recommendations.
3271 (3) If the message contains any header line starting with "List-" it is
3272 treated as non-personal.
3274 (4) The test for "circular" in the Subject: header line has been removed
3275 because it now seems ill-conceived.
3277 15. Minor typos in src/EDITME comments corrected.
3279 16. Installed latest exipick from John Jetmore.
3281 17. If headers_add on a router specified a text string that was too long for
3282 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3283 of string_sprintf() is now avoided.
3285 18. $message_body_size was not set (it was always zero) when running the DATA
3286 ACL and the local_scan() function.
3288 19. For the "mail" command in an Exim filter, no default was being set for
3289 the once_repeat time, causing a random time value to be used if "once" was
3290 specified. (If the value happened to be <= 0, no repeat happened.) The
3291 default is now 0s, meaning "never repeat". The "vacation" command was OK
3292 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3293 (I found it when inspecting the code).
3295 20. There is now an overall timeout for performing a callout verification. It
3296 defaults to 4 times the callout timeout, which applies to individual SMTP
3297 commands during the callout. The overall timeout applies when there is more
3298 than one host that can be tried. The timeout is checked before trying the
3299 next host. This prevents very long delays if there are a large number of
3300 hosts and all are timing out (e.g. when the network connections are timing
3301 out). The value of the overall timeout can be changed by specifying an
3302 additional sub-option for "callout", called "maxwait". For example:
3304 verify = sender/callout=5s,maxwait=20s
3306 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3307 to the end before writing, but this should make it even safer).
3309 22. Exim was forgetting that it had advertised PIPELINING for the second and
3310 subsequent messages on an SMTP connection. It was also not resetting its
3311 memory on STARTTLS and an internal HELO.
3313 23. When Exim logs an SMTP synchronization error within a session, it now
3314 records whether PIPELINING has been advertised or not.
3316 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3317 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3318 rather than long int.
3320 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3322 26. Added the never_mail option to autoreply.
3328 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3329 crash if the getsockname() call failed; this can happen if a connection is
3330 closed very soon after it is established. The problem was simply in the
3331 order in which certain operations were done, causing Exim to try to write
3332 to the SMTP stream before it had set up the file descriptor. The bug has
3333 been fixed by making things happen in the correct order.
3339 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3340 before the connection was closed, thus losing the rejection response.
3342 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3343 some early Solaris releases, but causes trouble in current releases where
3344 socklen_t is defined.
3346 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3349 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3352 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3353 that releasing the top of it at the end releases what was used for sub-
3354 expansions (unless the block got too big). However, discard this block if
3355 the first thing is a variable or header, so that we can use its block when
3356 it is dynamic (useful for very large $message_headers, for example).
3358 6. Lookups now cache *every* query, not just the most recent. A new, separate
3359 store pool is used for this. It can be recovered when all lookup caches are
3360 flushed. Lookups now release memory at the end of their result strings.
3361 This has involved some general refactoring of the lookup sources.
3363 7. Some code has been added to the store_xxx() functions to reduce the amount
3364 of flapping under certain conditions.
3366 8. log_incoming_interface used to affect only the <= reception log lines. Now
3367 it causes the local interface and port to be added to several more SMTP log
3368 lines, for example "SMTP connection from", and rejection lines.
3370 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3372 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3374 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3375 could be overwritten at the end of the current message (or the start of a
3376 new message if it was set in a HELO ACL). The value is now preserved for
3377 the duration of the SMTP connection.
3379 12. If a transport had a headers_rewrite setting, and a matching header line
3380 contained an unqualified address, that address was qualified, even if it
3381 did not match any rewriting rules. The underlying bug was that the values
3382 of the flags that permit the existence of unqualified sender and recipient
3383 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3384 non-local messages, and by -bnq for local messages) were not being
3385 preserved with the message after it was received.
3387 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3388 "next input=" as part of the text comprising the host identity instead of
3389 the correct text. The code was using the same buffer for two different
3390 strings. However, depending on which order the printing function evaluated
3391 its arguments, the bug did not always show up. Under Linux, for example, my
3392 test suite worked just fine.
3394 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3395 doesn't work with some older versions of Perl. It has been changed to "my",
3396 which in any case is probably the better facility to use.
3398 15. A really picky compiler found some instances of statements for creating
3399 error messages that either had too many or two few arguments for the format
3402 16. The size of the buffer for calls to the DNS resolver has been increased
3403 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3404 for addresses that have a lot of PTR records. This alleviates a problem; it
3405 does not fully solve it.
3407 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3408 buffer now truncates the list and logs the incident, which is the same
3409 action as happens when Exim is looking up a host name and its aliases.
3410 Previously in this situation something unpredictable would happen;
3411 sometimes it was "internal error: store_reset failed".
3413 18. If a server dropped the connection unexpectedly when an Exim client was
3414 using GnuTLS and trying to read a response, the client delivery process
3415 crashed while trying to generate an error log message.
3417 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3418 string, for example:
3420 warn message = H1: something\nH2: something
3422 the text was added as a single header line from Exim's point of view
3423 though it ended up OK in the delivered message. However, searching for the
3424 second and subsequent header lines using $h_h2: did not work. This has been
3425 fixed. Similarly, if a system filter added multiple headers in this way,
3426 the routers could not see them.
3428 20. Expanded the error message when iplsearch is called with an invalid key to
3429 suggest using net-iplsearch in a host list.
3431 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3432 ACLs are no longer actually imposed (and a message to that effect is
3435 22. If a "gecos" field in a passwd entry contained escaped characters, in
3436 particular, if it contained a \" sequence, Exim got it wrong when building
3437 a From: or a Sender: header from that name. A second bug also caused
3438 incorrect handling when an unquoted " was present following a character
3439 that needed quoting.
3441 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3442 was not being matched caselessly.
3444 24. Arranged for all hyphens in the exim.8 source to be escaped with
3447 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3448 properly. Recipient callout cache records were still being keyed to include
3449 the sender, even when use_sender was set false. This led to far more
3450 callouts that were necessary. The sender is no longer included in the key
3451 when use_sender is false.
3453 26. Added "control = submission" modifier to ACLs.
3455 27. Added the ${base62d: operator to decode base 62 numbers.
3457 28. dnsdb lookups can now access SRV records.
3459 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3460 the configuration file.
3462 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3463 (-v) mode. This makes the output for a verbose queue run more intelligible.
3465 31. Added a use_postmaster feature to recipient callouts.
3467 32. Added the $body_zerocount variable, containing the number of binary zero
3468 bytes in the message body.
3470 33. The time of last modification of the "new" subdirectory is now used as the
3471 "mailbox time last read" when there is a quota error for a maildir
3474 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3476 35. Added +ignore_unknown as a special item in host lists.
3478 36. Code for decoding IPv6 addresses in host lists is now included, even if
3479 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3480 address was recognized as an IP address, but was then not correctly decoded
3481 into binary, causing unexpected and incorrect effects when compared with
3488 1. Very minor rewording of debugging text in manualroute to say "list of
3489 hosts" instead of "hostlist".
3491 2. If verify=header_syntax was set, and a header line with an unqualified
3492 address (no domain) and a large number of spaces between the end of the
3493 name and the colon was received, the reception process suffered a buffer
3494 overflow, and (when I tested it) crashed. This was caused by some obsolete
3495 code that should have been removed. The fix is to remove it!
3497 3. When running in the test harness, delay a bit after writing a bounce
3498 message to get a bit more predictability in the log output.
3500 4. Added a call to search_tidyup() just before forking a reception process. In
3501 theory, someone could use a lookup in the expansion of smtp_accept_max_
3502 per_host which, without the tidyup, could leave open a database connection.
3504 5. Added the variables $recipient_data and $sender_data which get set from a
3505 lookup success in an ACL "recipients" or "senders" condition, or a router
3506 "senders" option, similar to $domain_data and $local_part_data.
3508 6. Moved the writing of debug_print from before to after the "senders" test
3511 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3512 problems for message scanning, either using a data ACL, or using
3513 local_scan() because the Received: header was not generated till after they
3514 were called (in order to set the time as the time of reception completion).
3515 I have revised the way this works. The header is now generated after the
3516 body is received, but before the ACL or local_scan() are called. After they
3517 are run, the timestamp in the header is updated.
3523 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3524 before starting a queue runner without re-exec. This happened only when
3525 deliver_drop_privilege was set or when the Exim user was set to root. The
3526 effect of the bug was that timeouts during subsequent deliveries caused
3527 crashes instead of being properly handled. The handler is now left at its
3528 default (and expected) setting.
3530 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3531 message, again when deliver_drop_privilege is set or Exim is run as root.
3532 The bug described in (1) was not present in this case, but the tidying up
3533 of the other signals was missing. I have made the two cases consistent.
3535 3. The ignore_target_hosts setting on a manualroute router was being ignored
3536 for hosts that were looked up using the /MX notation.
3538 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3541 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3542 operated on the sender address. After changing the $sender_address to <>
3543 for the sender address verify, Exim was re-instated it as the original
3544 (before rewriting) address, but remembering that it had rewritten it, so it
3545 wasn't rewriting it again. This bug also had the effect of breaking the
3546 sender address verification caching when the sender address was rewritten.
3548 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3549 This has been changed so that if the ip literal address matches
3550 ignore_target_hosts, the router declines.
3552 7. Added expansion conditions match_domain, match_address, and match_local_
3553 part (NOT match_host).
3555 8. The placeholder for the Received: header didn't have a length field set.
3557 9. Added code to Exim itself and to exim_lock to test for a specific race
3558 condition that could lead to file corruption when using MBX delivery. The
3559 issue is with the lockfile that is created in /tmp. If this file is removed
3560 after a process has opened it but before that process has acquired a lock,
3561 there is the potential for a second process to recreate the file and also
3562 acquire a lock. This could lead to two Exim processes writing to the file
3563 at the same time. The added code performs the same test as UW imapd; it
3564 checks after acquiring the lock that its file descriptor still refers to
3565 the same named file.
3567 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3568 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3571 11. Added the smtp_active_hostname option. If used, this will typically be made
3572 to depend on the incoming interface address. Because $interface_address is
3573 not set up until the daemon has forked a reception process, error responses
3574 that can happen earlier (such as "too many connections") no longer contain
3577 12. If an expansion in a condition on a "warn" statement fails because a lookup
3578 defers, the "warn" statement is abandoned, and the next ACL statement is
3579 processed. Previously this caused the whole ACL to be aborted.
3581 13. Added the iplsearch lookup type.
3583 14. Added ident_timeout as a log selector.
3585 15. Added tls_certificate_verified as a log selector.
3587 16. Added a global option tls_require_ciphers (compare the smtp transport
3588 option of the same name). This controls incoming TLS connections.
3590 17. I finally figured out how to make tls_require_ciphers do a similar thing
3591 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3592 before starting the TLS session.
3594 18. Tabs are now shown as \t in -bP output.
3596 19. If the log selector return_path_on_delivery was set, Exim crashed when
3597 bouncing a message because it had too many Received: header lines.
3599 20. If two routers both had headers_remove settings, and the first one included
3600 a superfluous trailing colon, the final name in the first list and the
3601 first name in the second list were incorrectly joined into one item (with a
3602 colon in the middle).
3608 1. Added -C and -D options to the exinext utility, mainly to make it easier
3609 to include in the automated testing, but these could be helpful when
3610 multiple configurations are in use.
3612 2. The exinext utility was not formatting the output nicely when there was
3613 an alternate port involved in the retry record key, nor when there was a
3614 message id as well (for retries that were specific to a specific message
3615 and a specific host). It was also confused by IPv6 addresses, because of
3616 the additional colons they contain. I have fixed the IPv4 problem, and
3617 patched it up to do a reasonable job for IPv6.
3619 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3620 delivery, the log line now contains "pipelined" if PIPELINING was used.
3622 4. An SMTP transport process used to panic and die if the bind() call to set
3623 an explicit outgoing interface failed. This has been changed; it is now
3624 treated in the same way as a connect() failure.
3626 5. A reference to $sender_host_name in the part of a conditional expansion
3627 that was being skipped was still causing a DNS lookup. This no longer
3630 6. The def: expansion condition was not recognizing references to header lines
3631 that used bh_ and bheader_.
3633 7. Added the _cache feature to named lists.
3635 8. The code for checking quota_filecount in the appendfile transport was
3636 allowing one more file than it should have been.
3638 9. For compatibility with Sendmail, the command line option
3646 and sets the incoming protocol and host name (for trusted callers). The
3647 host name and its colon can be omitted when only the protocol is to be set.
3648 Note the Exim already has two private options, -pd and -ps, that refer to
3649 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3650 "s", but I don't think that's a major issue.
3652 10. A number of refactoring changes to the code, none of which should affect
3655 (a) The number of logging options was getting close to filling up the
3656 32-bit word that was used as a bit map. I have split them into two classes:
3657 those that are passed in the argument to log_write(), and those that are
3658 only ever tested independently outside of that function. These are now in
3659 separate 32-bit words, so there is plenty of room for expansion again.
3660 There is no change in the user interface or the logging behaviour.
3662 (b) When building, for example, log lines, the code previously used a
3663 macro that called string_cat() twice, in order to add two strings. This is
3664 not really sufficiently general. Furthermore, there was one instance where
3665 it was actually wrong because one of the argument was used twice, and in
3666 one call a function was used. (As it happened, calling the function twice
3667 did not affect the overall behaviour.) The macro has been replaced by a
3668 function that can join an arbitrary number of extra strings onto a growing
3671 (c) The code for expansion conditions now uses a table and a binary chop
3672 instead of a serial search (which was left over from when there were very
3673 few conditions). Also, it now recognizes conditions like "pam" even when
3674 the relevant support is not compiled in: a suitably worded error message is
3675 given if an attempt is made to use such a condition.
3677 11. Added ${time_interval:xxxxx}.
3679 12. A bug was causing one of the ddress fields not to be passed back correctly
3680 from remote delivery subprocesses. The field in question was not being
3681 subsequently used, so this caused to problems in practice.
3683 13. Added new log selectors queue_time and deliver_time.
3685 14. Might have fixed a bug in maildirsizefile handling that threw up
3686 "unexpected character" debug warnings, and recalculated the data
3687 unnecessarily. In any case, I expanded the warning message to give more
3690 15. Added the message "Restricted characters in address" to the statements in
3691 the default ACL that block characters like @ and % in local parts.
3693 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3694 Three changes have been made:
3696 (a) There was a serious bug; a negative response to MAIL caused the whole
3697 recipient domain to be cached as invalid, thereby blocking all messages
3698 to all local parts at the same domain, from all senders. This bug has
3699 been fixed. The domain is no longer cached after a negative response to
3700 MAIL if the sender used is not empty.
3702 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3705 (c) A new callout option, "use_sender" has been added for people who want
3706 the modified behaviour.
3712 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3715 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3716 indeed breaks things for older releases.
3718 3. Added additional logging to the case where there is a problem reading data
3719 from a filter that is running in a subprocess using a pipe, in order to
3720 try to track down a specific problem.
3722 4. Testing facility fudge: when running in the test harness and attempting
3723 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3724 getting "No route to host". Convert this to a timeout.
3726 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3729 6. Some OS don't have socklen_t but use size_t instead. This affects the
3730 fifth argument of getsockopt() amongst other things. This is now
3731 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3732 can be set for individual OS. I have set it for SunOS5, OSF1, and
3733 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3734 some earlier ones do not.
3736 7. Change 4.30/15 was not doing the test caselessly.
3738 8. The standard form for an IPv6 address literal was being rejected by address
3739 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3740 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3741 this, as well as the form without the "IPv6" on the front (but only when
3742 address literals are enabled, of course).
3744 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3746 10. Exim crashed if a message with an empty sender address specified by -f
3747 encountered a router with an errors_to setting. This could be provoked only
3748 by a command such as
3752 where an empty string was supplied; "<>" did not hit this bug.
3754 11. Installed PCRE release 4.5.
3756 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3757 remained set. It is now erased.
3759 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3760 times from message ids (which are base 36 rather than the normal 62).
3762 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3763 were being counted as actual protocol errors, and logged if the log
3764 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3765 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3766 and DATA following a set of rejected RCPTs do not count as protocol errors.
3767 In other words, Exim assumes they were pipelined, though this may not
3768 actually be the case. Of course, in all cases the client gets an
3769 appropriate error code.
3771 15. If a lookup fails in an ACL condition, a message about the failure may
3772 be available; it is used if testing the ACL cannot continue, because most
3773 such messages specify what the cause of the deferral is. However, some
3774 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3775 that caused an old message to be retained and used if a later statement
3776 caused a defer, replacing the real cause of the deferral.
3778 16. If an IP address had so many PTR records that the DNS lookup buffer
3779 was not large enough to hold them, Exim could crash while trying to process
3780 the truncated data. It now detects and logs this case.
3782 17. Further to 4.21/58, another change has been made: if (and only if) the
3783 first line of a message (the first header line) ends with CRLF, a bare LF
3784 in a subsequent header line has a space inserted after it, so as not to
3785 terminate the header.
3787 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3788 unnecessarily, used atoi() instead of strtol(), and didn't check the
3789 termination when getting file sizes from file names by regex.
3791 19. Completely re-implemented the support for maildirsize files, in the light
3792 of a number of problems with the previous contributed implementation
3793 (4.30/29). In particular:
3795 . If the quota is zero, the maildirsize file is maintained, but no quota is
3798 . If the maildir directory does not exist, it is created before any attempt
3799 to write a maildirsize file.
3801 . The quota value in the file is just a cache; if the quota is changed in
3802 the transport, the new value overrides.
3804 . A regular expression is available for excluding directories from the
3807 20. The autoreply transport checks the characters in options that define the
3808 message's headers; it allows continued headers, but it was checking with
3809 isspace() after an embedded newline instead of explicitly looking for a
3812 21. If all the "regular" hosts to which an address was routed had passed their
3813 expiry times, and had not reached their retry times, the address was
3814 bounced, even if fallback hosts were defined. Now Exim should go on to try
3817 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3818 equivalent code in the SMTP transport. Some hosts send humungous responses
3819 to HELO/EHLO, more than 1024 it seems.
3821 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3822 gives compiler warnings in some environments. I've now done it "properly",
3825 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3826 (because of problems with the built-in one) was declared to return uschar *
3827 instead of char *, causing compiler failure.
3829 25. Fixed a file descriptor leak when processing alias/forward files.
3831 26. Fixed a minor format string issue in dbfn.c.
3833 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3835 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3836 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3839 29. When a sender address is verified, it is cached, to save repeating the test
3840 when there is more than one recipient in a message. However, when the
3841 verification involves a callout, it is possible for different callout
3842 options to be set for different recipients. It is too complicated to keep
3843 track of this in the cache, so now Exim always runs a verification when a
3844 callout is required, relying on the callout cache for the optimization.
3845 The overhead is duplication of the address routing, but this should not be
3848 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3849 to be verified with callout=postmaster, and the main callout worked but the
3850 postmaster check failed, the verification correctly failed. However, if a
3851 subsequent RCPT command asked for sender verification *without* the
3852 postmaster check, incorrect caching caused this verification also to fail,
3855 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3856 it was not caching the DNS options (qualify_single, search_parents) that
3857 were used when the lookup failed. A subsequent lookup with different
3858 options therefore always gave the same answer, though there were cases
3859 where it should not have. (Example: a "domains = !$mx_any" option on a
3860 dnslookup router: the "domains" option is always processed without any
3861 widening, but the router might have qualify_single set.) Now Exim uses the
3862 cached value only when the same options are set.
3864 32. Added John Jetmore's "exipick" utility to the distribution.
3866 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3867 than a timeout (e.g. a certificate is required, and is not provided), an
3868 Exim server now closes the connection immediately. Previously it waited for
3869 the client to close - but if the client is SSL, it seems that they each
3870 wait for each other, leading to a delay before one of them times out.
3872 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3873 maintained 0.8.x compatibility because I don't think many are using it, and
3874 it is clearly obsolete.
3876 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3879 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3880 client certificate was expired. A simple patch fixes this, though I don't
3881 understand the full logic of why the verify callback is called multiple
3884 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3885 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3886 which causes problems with some clients (such as the Certicom SSL Plus
3887 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3888 disables the coutermeasure allowing Eudora to connect."
3890 38. Exim was not checking that a write() to a log file succeeded. This could
3891 lead to Bad Things if a log got too big, in particular if it hit a file
3892 size limit. Exim now panics and dies if it cannot write to a log file, just
3893 as it does if it cannot open a log file.
3895 39. Modified OS/Makefile-Linux so that it now contains
3897 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3899 The two -D definitions ensure that Exim is compiled with large file
3900 support, which makes it possible to handle log files that are bigger than
3903 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3904 instance) a domain was checked against a named list that involved a lookup,
3905 causing $domain_data to be set, then another domain was checked against the
3906 same list, then the first domain was re-checked, the value of $domain_data
3907 after the final check could be wrong. In particular, if the second check
3908 failed, it could be set empty. This bug probably also applied to
3911 41. The strip_trailing_dot option was not being applied to the address given
3912 with the -f command-line option.
3914 42. The code for reading a message's header from the spool was incrementing
3915 $received_count, but never initializing it. This meant that the value was
3916 incorrect (doubled) while delivering a message in the same process in which
3917 it was received. In the most common configuration of Exim, this never
3918 happens - a fresh exec is done - but it can happen when
3919 deliver_drop_privilege is set.
3921 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3922 it now includes up to 150 characters of the unexpected data in the log
3925 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3926 and building data strings. The size of both of these buffers was 10 000
3927 bytes - far larger than anybody would *ever* want, thought I. Needless to
3928 say, somebody hit the limit. I have increased the maximum line length to
3929 20 000 and the maximum data length of concatenated lines to 100 000. I have
3930 also fixed two bugs, because there was no checking on these buffers. Tsk,
3931 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3932 buffer is too small.
3934 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3935 lsearch lookups. Now it does.
3937 46. When parsing a route_list item in a manualroute router, a fixed-length
3938 buffer was used for the list of hosts. I made this 1024 bytes long,
3939 thinking that nobody would ever have a list of hosts that long. Wrong.
3940 Somebody had a whole pile of complicated expansion conditions, and the
3941 string was silently truncated, leading to an expansion error. It turns out
3942 that it is easier to change to an unlimited length (owing to other changes
3943 that have happened since this code was originally written) than to build
3944 structure for giving a limitation error. The length of the item that
3945 expands into the list of hosts is now unlimited.
3947 47. The lsearch lookup could not handle data where the length of text line was
3948 more than 4095 characters. Such lines were truncated, leading to shortened
3949 data being returned. It should now handle lines of any length.
3951 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3952 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3955 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3956 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3957 no longer happens in comment lines. A list of replacements is now placed
3958 at the head of all of the source files, except those whose only change is
3959 to replace PERL_COMMAND in the very first #! line.
3961 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3962 messages on the queue, with a bottom-up merge sort, using code contributed
3963 by Michael Haardt. This should make operations like -bp somewhat faster on
3964 large queues. It won't affect queue runners, except when queue_run_in_order
3967 51. Installed eximstats 1.31 in the distribution.
3969 52. Added support for SRV lookups to the dnslookup router.
3971 53. If an ACL referred to $message_body or $message_body_end, the value was not
3972 reset for any messages that followed in the same SMTP session.
3974 54. The store-handling optimization for building very long strings was not
3975 differentiating between the different store pools. I don't think this
3976 actually made any difference in practice, but I've tidied it.
3978 55. While running the routers to verify a sender address, $sender_address
3979 was still set to the sender address. This is wrong, because when routing to
3980 send a bounce to the sender, it would be empty. Therefore, I have changed
3981 it so that, while verifying a sender address, $sender_address is set to <>.
3982 (There is no change to what happens when verifying a recipient address.)
3984 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3985 target A or AAAA records (if not already returned) without resetting the
3986 qualify_single or search_parents options of the DNS resolver. These are
3987 inappropriate in this case because the targets of MX and SRV records must
3988 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3989 target that, when qualified, matched something in the local domain. These
3990 two options are now turned off when doing these lookups.
3992 57. It seems that at least some releases of Reiserfs (which does not have the
3993 concept of a fixed number of inodes) returns zero and not -1 for the
3994 number of available inodes. This interacted badly with check_spool_inodes,
3995 which assumed that -1 was the "no such thing" setting. What I have done is
3996 to check that the total number of inodes is greater than zero before doing
3997 the test of how many are available.
3999 58. When a "warn" ACL statement has a log_message modifier, the message is
4000 remembered, and not repeated. This is to avoid a lot of repetition when a
4001 message has many recipients that cause the same warning to be written.
4002 Howewer, Exim was preserving the list of already written lines for an
4003 entire SMTP session, which doesn't seem right. The memory is now reset if a
4004 new message is started.
4006 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4007 debugging output unless log_rewrite was also set.
4009 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4010 of (int)(handle) when we know that handle contains (void *)(-1).
4012 61. The Exim daemon panic-logs an error return when it closes the incoming
4013 connection. However "connection reset by peer" seems to be common, and
4014 isn't really an error worthy of noting specially, so that particular error
4017 62. When Exim is trying to find all the local interfaces, it used to panic and
4018 die if the ioctl to get the interface flags failed. However, it seems that
4019 on at least one OS (Solaris 9) it is possible to have an interface that is
4020 included in the list of interfaces, but for which you get a failure error
4021 for this call. This happens when the interface is not "plumbed" into a
4022 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4023 failure of the "get flags" call assumes that the interface is down.
4025 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4026 makes life easier for people who are doing arithmetic on fields extracted
4027 from dates, where you often get leading zeros that should not be
4028 interpreted as octal.
4030 64. Added qualify_domain to the redirect router, to override the global
4033 65. If a pathologically long header line contained very many addresses (the
4034 report of this problem mentioned 10 000) and each of them was rewritten,
4035 Exim could use up a very large amount of memory. (It kept on making new
4036 copies of the header line as it rewrote, and never released the old ones.)
4037 At the expense of a bit more processing, the header rewriting function has
4038 been changed so that it no longer eats memory in this way.
4040 66. The generation of the Received: header has been moved from the time that a
4041 message starts to be received, to the time that it finishes. The timestamp
4042 in the Received: header should now be very close to that of the <= log
4043 line. There are two side-effects of this change:
4045 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4046 logged header lines no longer include the local Received: line, because
4047 it has not yet been created. The same applies to a copy of the message
4048 that is returned to a non-SMTP sender when a message is rejected.
4050 (b) When a filter file is tested using -bf, no additional Received: header
4051 is added to the test message. After some thought, I decided that this
4054 This change does not affect the value of $received_for. It is still set
4055 after address rewriting, but before local_scan() is called.
4057 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4059 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4060 gave an unhelpful panic error message, and a defer error. I have managed to
4061 change this behaviour so that it now rejects any supplied certificate,
4062 which seems right, as the list of acceptable certificates is empty.
4064 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4065 gave an unhelpful defer error. I have not managed to make this reject any
4066 supplied certificates, but the error message it gives is "no certificate
4067 supplied", which is not helpful.
4069 70. exigrep's output now also includes lines that are not associated with any
4070 message, but which match the given pattern. Implemented by a patch from
4071 Martin Sluka, which also tidied up the Perl a bit.
4073 71. Recipient callout verification, like sender verification, was using <> in
4074 the MAIL FROM command. This isn't really the right thing, since the actual
4075 sender may affect whether the remote host accepts the recipient or not. I
4076 have changed it to use the actual sender in the callout; this means that
4077 the cache record is now keyed on a recipient/sender pair, not just the
4078 recipient address. There doesn't seem to be a real danger of callout loops,
4079 since a callout by the remote host to check the sender would use <>.
4080 [SEE ABOVE: changed after hitting problems.]
4082 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4083 temporary errors. However, in the case of such a code being given after
4084 the end of a data transmission (i.e. after ".") Exim was failing to write
4085 a retry record for the message. (Yes, there was some broken host that was
4086 actually sending 8xx at this point.)
4088 73. An unknown lookup type in a host list could cause Exim to panic-die when
4089 the list was checked. (An example that provoked this was putting <; in the
4090 middle of a list instead of at the start.) If this happened during a DATA
4091 ACL check, a -D file could be left lying around. This kind of configuration
4092 error no longer causes Exim to die; instead it causes a defer errror. The
4093 incident is still logged to the main and panic logs.
4095 74. Buglet left over from Exim 3 conversion. The message "too many messages
4096 in one connection" was written to the rejectlog but not the mainlog, except
4097 when address rewriting (yes!) was being logged.
4099 75. Added write_rejectlog option.
4101 76. When a system filter was run not as root (that is, when system_filter_user
4102 was set), the values of the $n variables were not being returned to the
4103 main process; thus, they were not subsequently available in the $sn
4106 77. Added +return_path_on_delivery log selector.
4108 78. A connection timeout was being treated differently from recipients deferred
4109 when testing hosts_max_try with a message that was older than the host's
4110 retry timeout. (The host should not be counted, thus allowing all hosts to
4111 be tried at least once before bouncing.) This may have been the cause of an
4112 occasionally reported bug whereby a message would remain on the queue
4113 longer than the retry timeout, but would be bounced if a delivery was
4114 forced. I say "may" because I never totally pinned down the problem;
4115 setting up timeout/retry tests is difficult. See also the next item.
4117 79. The ultimate address timeout was not being applied to errors that involved
4118 a combination of host plus message (for example, a timeout on a MAIL
4119 command). When an address resolved to a number of possible hosts, and they
4120 were not all tried for each delivery (e.g. because of hosts_max_try), a
4121 message could remain on the queue longer than the retry timeout.
4123 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4126 81. Fixed an obscure SMTP outgoing bug which required at least the following
4127 conditions: (a) there was another message waiting for the same server;
4128 (b) the server returned 5xx to all RCPT commands in the first message so
4129 that the message was not completed; (c) the server dropped the connection
4130 or gave a negative response to the RSET that Exim sends to abort the
4131 transaction. The observed case was a dropped connection after DATA that had
4132 been sent in pipelining mode. That is, the server had advertised PIPELINING
4133 but was not implementing it correctly. The effect of the bug was incorrect
4134 behaviour, such as trying another host, and this could lead to a crash.
4140 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4141 and daemon.c were passed as pointers to ints; they should have been
4142 pointers to socklen_t variables (which are typically unsigned ints).
4144 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4147 3. Fixed a really odd bug that affected only the testing scheme; patching a
4148 certain fixed string in the binary changed the value of another string that
4149 happened to be identical to the end of the original first string.
4151 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4152 name", it returns that address as the IP address. On some operating
4153 systems (e.g. Solaris), it also passes back the IP address string as the
4154 "host name". However, on others (e.g. Linux), it passes back an empty
4155 string. Exim wasn't checking for this, and was changing the host name to an
4156 empty string, assuming it had been canonicized.
4158 5. Although rare, it is permitted to have more than one PTR record for a given
4159 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4160 all the names associated with an address, because they do in Solaris.
4161 However, it seems that they do not in Linux for data that comes from the
4162 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4163 I found this out when I moved to a new Linux workstation and tried to run
4164 the Exim test suite.
4166 To get round this problem I have changed the code so that it now does its
4167 own call to the DNS to look up PTR records when searching for a host name.
4168 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4169 addresses that are only in /etc/hosts are still found.
4171 This behaviour is, however, controlled by an option called host_lookup_
4172 order, which defaults to "bydns:byaddr". If people want to use the other
4173 order, or indeed, just use one or the other means of lookup, they can
4174 specify it in this variable.
4176 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4177 some operating systems, this comes back from gethostbyaddr() as an empty
4178 string, and this is what Exim used to test for. However, it seems that in
4179 other systems, "." is yielded. Exim now tests for this case too.
4181 7. The values of check_spool_space and check_log_space are now held internally
4182 as a number of kilobytes instead of an absolute number of bytes. If a
4183 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4184 kilobyte. This means that much larger values can be stored.
4186 8. Exim monitor: an attempt to get the action menu when not actually pointing
4187 at a message produces an empty menu entitled "No message selected". This
4188 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4189 no entries in it ("Shell widget menu has zero width and/or height"). So I
4190 have added a single, blank menu entry in this case.
4192 9. Added ${quote_local_part.
4194 10. MIME decoding is now applied to the contents of Subject: header lines when
4197 11. Now that a reference to $sender_host_address automatically causes a reverse
4198 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4199 host lookup before query-style lookups in lists that might use this
4200 variable. This has therefore been abolished, and the "net-" prefix is no
4201 longer necessary for query-style lookups.
4203 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4204 have been a typo for LFLAGS, so it has been changed.
4206 13. The install script calls Exim with "-C /dev/null" in order to find the
4207 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4208 to be output. Howeve, since Exim outputs its version number before the
4209 error, it didn't break the script. It just looked ugly. I fixed this by
4210 always allowing "-C /dev/null" if the caller is root.
4212 14. Ignore overlarge ACL variable number when reading spool file - insurance
4213 against a later release with more variables having written the file.
4215 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4216 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4217 this, as well as the form without the "IPv6" on the front.
4219 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4220 OS/Makefile-Darwin file.
4222 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4223 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4225 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4226 variable. However, some OS use ints for inodes. I've added cast to long int
4227 to get rid of the compiler warning.
4229 19. I had forgotten to lock out "/../" in configuration file names when
4230 ALT_CONFIG_PREFIX was set.
4232 20. Routers used for verification do not need to specify transports. However,
4233 if such a router generated a host list, and callout was configured, Exim
4234 crashed, because it could not find a port number from the (non-existent)
4235 transport. It now assumes port 25 in this circumstance.
4237 21. Added the -t option to exigrep.
4239 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4240 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4241 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4242 them is set, LOOKUP_LSEARCH is forced.
4244 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4246 24. Added sender and host information to the "rejected by local_scan()" log
4247 line; previously there was no indication of these.
4249 25. Added .include_if_exists.
4251 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4252 Linux. It turns out that not all file systems support this. Apparently some
4253 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4254 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4255 not supported on the file descriptor, is now ignored when Exim is trying to
4256 sync a directory. This applies only to Linux.
4258 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4260 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4261 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4264 29. Added support for maildirsize files from supplied patch (modified a bit).
4266 30. The use of :fail: followed by an empty string could lead Exim to respond to
4267 sender verification failures with (e.g.):
4269 550 Verification failed for <xxx>
4270 550 Sender verify failed
4272 where the first response line was missing the '-' that indicates it is not
4273 the final line of the response.
4275 31. The loop for finding the name of the user that called Exim had a hardwired
4276 limit of 10; it now uses the value of finduser_retries, which is used for
4277 all other user lookups.
4279 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4282 33. Exim was neglecting to zero errno before one call of strtol() when
4283 expanding a string and expecting an integer value. On some systems this
4284 resulted in spurious "integer overflow" errors. Also, it was casting the
4285 result into an int without checking.
4287 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4288 did not work. The code looks as if it has *never* worked, though it appears
4289 to have been documented since at least releast 1.62. I have made it work.
4291 35. The "timeout_DNS" error in retry rules, also documented since at least
4292 1.62, also never worked. As it isn't clear exactly what this means, and
4293 clearly it isn't a major issue, I have abolished the feature by treating it
4294 as "timeout", and writing a warning to the main and panic logs.
4296 36. The display of retry rules for -brt wasn't always showing the error code
4299 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4300 timeout_connect_A, timeout_connect_MX.
4302 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4303 to the empty sender.
4305 39. The daemon was not analysing the content of -oX till after it had closed
4306 stderr and disconnected from the controlling terminal. This meant that any
4307 syntax errors were only noted on the panic log, and the return code from
4308 the command was 0. By re-arranging the code a little, I've made the
4309 decoding happen first, so such errors now appear on stderr, and the return
4310 code is 1. However, the actual setting up of the sockets still happens in
4311 the disconnected process, so errors there are still only recorded on the
4314 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4315 connections (as happens on some IP stacks) was logged at start up time as
4316 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4317 it from "IPv6 and IPv4", which means that two separate sockets are being
4320 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4321 says whether AF_INET or AF_INET6 was passed as an argument.
4323 42. Exiwhat output was messed up when time zones were included in log
4326 43. Exiwhat now gives more information about the daemon's listening ports,
4327 and whether -tls-on-connect was used.
4329 44. The "port" option of the smtp transport is now expanded.
4331 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4332 silently ignored. Now an error message is written to the main and panic
4335 46. There's a new ACL modifier called "logwrite" which writes to a log file
4336 as soon as it is encountered.
4338 47. Added $local_user_uid and $local_user_gid at routing time.
4340 48. Exim crashed when trying to verify a sender address that was being
4343 49. Exim was recognizing only a space character after ".include". It now also
4344 recognizes a tab character.
4346 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4347 extracting the relevant information from the specification. The man page no
4348 longer contains scrambled data for the -d option, and I've added a section
4349 at the front about calling Exim under different names.
4351 51. Added "extra_headers" argument to the "mail" command in filter files.
4353 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4356 53. Installed eximstats 1.29.
4358 54. Added transport_filter_timeout as a generic transport option.
4360 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4361 Cc: header lines. This was required by RFC 822, but it not required by RFC
4364 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4365 incoming messages that did not have them. Now it does so only if the
4366 message originates locally, that is, if there is no associated remote host
4367 address. When Resent- header lines are present, this applies to the Resent-
4368 lines rather than the non-Resent- lines.
4370 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4371 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4373 58. Messages for configuration errors now include the name of the main
4374 configuration file - useful now that there may be more than one file in a
4375 list (.included file names were always shown).
4377 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4378 for those rare installations that do not start the daemon as root or run it
4379 setuid root. I've cut out the call to initgroups() if the daemon is not
4382 60. The Exim user and group can now be bound into the binary as text strings
4383 that are looked up at the start of Exim's processing.
4385 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4387 62. Added $mailstore_basename variable.
4389 63. Installed patch to sieve.c from Michael Haardt.
4391 64. When Exim failed to open the panic log after failing to open the main log,
4392 the original message it was trying to log was written to stderr and debug
4393 output, but if they were not available (the usual case in production), it
4394 was lost. Now it is written to syslog before the two lines that record the
4395 failures to open the logs.
4397 65. Users' Exim filters run in subprocesses under the user's uid. It is
4398 possible for a "deliver" command or an alias in a "personal" command to
4399 provoke an address rewrite. If logging of address rewriting is configured,
4400 this fails because the process is not running as root or exim. There may be
4401 a better way of dealing with this, but for the moment (because 4.30 needs
4402 to be released), I have disabled address rewrite logging when running a
4403 filter in a non-root, non-exim process.
4409 1. The buildconfig auxiliary program wasn't quoting the value set for
4410 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4411 not defined. This bug was masked in 4.22 by the effect that was fixed in
4414 2. Some messages that were rejected after a message id was allocated were
4415 shown as "incomplete" by exigrep. It no longer does this for messages that
4416 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4418 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4419 have allow_domain_literals set, the ID did not get logged in the <= line.
4420 Domain literals are now always recognized in Message-ID: header lines.
4422 4. The first argument for a ${extract expansion item is the key name or field
4423 number. Leading and trailing spaces in this item were not being ignored,
4424 causing some misleading effects.
4426 5. When deliver_drop_privilege was set, single queue runner processes started
4427 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4428 same command in the process it spins off) were not dropping privilege.
4430 6. When the daemon running as "exim" started a queue runner, it always
4431 re-executed Exim in the spun-off process. This is a waste of effort when
4432 deliver_drop_privilege is set. The new process now just calls the
4433 queue-runner function directly.
4439 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4442 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4443 ignored. Though the use of -oP was forcing the writing of a pid file, it
4444 was always written to the default place.
4446 3. If the message "no IP address found for host xxxx" is generated during
4447 incoming verification, it is now followed by identification of the incoming
4448 connection (so you can more easily find what provoked it).
4450 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4452 5. Added some features to "harden" Exim a bit more against certain attacks:
4454 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4455 be put in Local/Makefile. This is like the never_users runtime option,
4456 but it cannot be overridden. The default setting is "root".
4458 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4459 prefix string with which any file named in a -C command line option
4462 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4463 is retained for -C and -D only if the caller of Exim is root. Without
4464 it, the exim user may also use -C and -D and retain privilege.
4466 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4467 command line option is disabled.
4469 6. Macro names set by the -D option must start with an upper case letter, just
4470 like macro names defined in the configuration file.
4472 7. Added "dereference=" facility to LDAP.
4474 8. Two instances of the typo "uknown" in the source files are fixed.
4476 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4477 the Configure-Makefile script screwed up while processing it.
4479 10. Incorporated PCRE 4.4.
4481 11. The SMTP synchronization check was not operating right at the start of an
4482 SMTP session. For example, it could not catch a HELO sent before the client
4483 waited for the greeting. There is now a check for outstanding input at the
4484 point when the greeting is written. Because of the duplex, asynchronous
4485 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4486 way, but not yet received, when the check is performed.
4488 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4489 on TCP/IP sockets, because this apparently causes some broken clients to
4492 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4493 unchanged) from the Cygwin maintainer.
4495 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4496 was supported instead of testing for mbx. Effectively a typo.
4498 15. The spa authenticator server code was not checking that the input it
4499 received was valid base64.
4501 16. The debug output line for the "set" modifier in ACLs was not showing the
4502 name of the variable that was being set.
4504 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4506 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4507 lookup on its own. Something else was needed to trigger the lookup. For
4508 example, a match in host_lookup or the need for a host name in a host list.
4509 Now, if $sender_host_name is referenced and the host name has not yet been
4510 looked up, a lookup is performed. If the lookup fails, the variable remains
4511 empty, and $host_lookup_failed is set to "1".
4513 19. Added "eqi" as a case-independent comparison operator.
4515 20. The saslauthd authentication condition could segfault if neither service
4516 nor realm was specified.
4518 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4519 error message that was logged was misleading, and incoming SMTP
4520 connections were dropped. The message is now more accurate, and temporary
4521 errors are given to SMTP connections.
4523 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4524 (except RSET) with a 421 error, until QUIT is received. However, it was
4525 failing to send a response to QUIT.
4527 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4528 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4529 ACL is now run after the helo_try_verify_hosts code.
4531 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4532 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4533 case-independent, so other case variants are also recognized). Apparently
4534 some systems use these upper case variants.
4536 25. If more than two messages were waiting for the same host, and a transport
4537 filter was specified for the transport, Exim sent two messages over the
4538 same TCP/IP connection, and then failed with "socket operation on non-
4539 socket" when it tried to send the third.
4541 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4543 27. The extern definition of crypt16() in expand.c was not being excluded when
4544 the OS had its own crypt16() function.
4546 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4547 as a preferred synonym for return_size_limit, both as an option and as an
4550 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4552 30. Changed the default configuration ACL to relax the local part checking rule
4553 for addresses that are not in any local domains. For these addresses,
4554 slashes and pipe symbols are allowed within local parts, but the sequence
4555 /../ is explicitly forbidden.
4557 31. SPA server authentication was not clearing the challenge buffer before
4560 32. log_message in a "warn" ACL statement was writing to the reject log as
4561 well as to the main log, which contradicts the documentation and doesn't
4562 seem right (because no rejection is happening). So I have stopped it.
4564 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4565 However, I am unable to do any testing of this.
4567 34. Fixed an infelicity in the appendfile transport. When checking directories
4568 for a mailbox, to see if any needed to be created, it was accidentally
4569 using path names with one or more superfluous leading slashes; tracing
4570 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4572 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4573 contents are added to the log line that is written for every discarded
4574 recipient. (Previously a log_message setting was ignored.)
4576 36. The ${quote: operator now quotes the string if it is empty.
4578 37. The install script runs exim in order to find its version number. If for
4579 some reason other than non-existence or emptiness, which it checks, it
4580 could not run './exim', it was installing it with an empty version number,
4581 i.e. as "exim-". This error state is now caught, and the installation is
4584 38. An argument was missing from the function that creates an error message
4585 when Exim fails to connect to the socket for saslauthd authentication.
4586 This could cause Exim to crash, or give a corrupted message.
4588 39. Added isip, isip4, and isip6 to ${if conditions.
4590 40. The ACL variables $acl_xx are now saved with the message, and can be
4591 accessed later in routers, transports, and filters.
4593 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4594 strings in the file are not string-expanded.
4596 42. If a MAIL command specified a SIZE value that was too large to fit into an
4597 int variable, the check against message_size_limit failed. Such values are
4598 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4599 day this will have to be increased, but I don't think I want to be around
4600 when emails are that large.
4607 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4608 iconv() is not standard in FreeBSD.
4610 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4611 IPv6 enabled. The observed symptom was a segmentation fault on return from
4612 the function os_common_find_running_interfaces() in src/os.c.
4614 3. In the check_special_case() function in daemon.c I had used "errno" as an
4615 argument name, which causes warnings on some systems. This was basically a
4616 typo, since it was named "eno" in the comments!
4618 4. The code that waits for the clock to tick (at a resolution of some fraction
4619 of a second) so as to ensure message-id uniqueness was always waiting for
4620 at least one whole tick, when it could have waited for less. [This is
4621 almost certainly not relevant at current processor speeds, where it is
4622 unlikely to ever wait at all. But we try to future-proof.]
4624 5. The function that sleeps for a time interval that includes fractions of a
4625 second contained a race. It did not block SIGALRM between setting the
4626 timer, and suspending (a couple of lines later). If the interval was short
4627 and the sigsuspend() was delayed until after it had expired, the suspension
4628 never ended. On busy systems this could lead to processes getting stuck for
4631 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4632 process, before it forks any delivery processes. The open lookup caching
4633 mechanism meant that the open file or database connection was passed into
4634 the delivery process. The problem was that delivery processes always tidy
4635 up cached lookup data. This could cause a problem for the next delivery
4636 process started by the queue runner, because the external queue runner
4637 process does not know about the closure. So the next delivery process
4638 still has data in the lookup cache. In the case of a file lookup, there was
4639 no problem because closing a file descriptor in a subprocess doesn't affect
4640 the parent. However, if the lookup was caching a connection to a database,
4641 the connection was closed, and the second delivery process was likely to
4642 see errors such as "PGSQL: query failed: server closed the connection
4643 unexpectedly". The problem has been fixed by closing all cached lookups
4644 in a queue runner before running a delivery process.
4646 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4647 seem to have the "const" qualifier which it has on other OS. I've
4650 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4651 *of the same type* (client or server) with the same public name that an
4652 error should be diagnosed.
4654 9. When Exim looked up a host name for an IP address, but failed to find the
4655 original IP address when looking up the host name (a safety check), it
4656 output the message "<ip address> does not match any IP for NULL", which was
4657 confusing, to say the least. The bug was that the host name should have
4658 appeared instead of "NULL".
4660 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4661 user that is built into the binary, and the -C or -D options is used, root
4662 privilege is dropped before the configuration file is read. In addition,
4663 logging is switched to stderr instead of the normal log files. If the
4664 configuration then re-defines the Exim user, the unprivileged environment
4665 is probably not what is expected, so Exim logs a panic warning message (but
4668 However, if deliver_drop_privilege is set, the unprivileged state may well
4669 be exactly what is intended, so the warning has been cut out in that case,
4670 and Exim is allowed to try to write to its normal log files.
4676 1. smtp_return_error_details was not giving details for temporary sender
4677 or receiver verification errors.
4679 2. Diagnose a configuration error if two authenticators have the same public
4682 3. Exim used not to create the message log file for a message until the first
4683 delivery attempt. This could be confusing when incoming messages were held
4684 for policy or load reasons. The message log file is now created at the time
4685 the message is received, and an initial "Received" line is written to it.
4687 4. The automatically generated man page for command line options had a minor
4688 bug that caused no ill effects; however, a more serious problem was that
4689 the procedure for building the man page automatically didn't always
4690 operate. Consequently, release 4.20 contains an out-of-date version. This
4691 shouldn't happen again.
4693 5. When building Exim with embedded Perl support, the script that builds the
4694 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4695 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4697 6. The freeze_tell option was not being used for messages that were frozen on
4698 arrival, either by an ACL or by local_scan().
4700 7. Added the smtp_incomplete_transaction log selector.
4702 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4703 was accepting AUTH without a new EHLO.
4705 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4706 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4709 10. Logging of TCP/IP connections (when configured) now happens in the main
4710 daemon process instead of the child process, so that the TCP/IP connection
4711 count is more accurate (but it can never be perfect).
4713 11. The use of "drop" in a nested ACL was not being handled correctly in the
4714 outer ACL. Now, if condition failure induced by the nested "drop" causes
4715 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4716 or "require"), the connection is dropped.
4718 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4719 that yield "discard" can now be used with an "accept" or a "discard" verb,
4720 but an error is generated for any others (because I can't see a useful way
4721 to define what should happen).
4723 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4724 are now processed in the same way as lines in the Exim configuration file.
4725 In particular, continuation lines are supported.
4727 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4729 15. Added -ti meaning -t -i.
4731 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4732 domains, and warn by logging if others are found.
4734 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4735 returned from GIFCONF when Exim is trying to find the list of interfaces on
4736 a host. The code in os.c has been modified to copy each ifreq to an aligned
4737 structure in all cases.
4739 Also, in some cases, the returned ifreq's were being copied to a 'struct
4740 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4741 means the last couple of bytes of an IPv6 address could be chopped if the
4742 ifreq contained only a normal sockaddr (14 bytes storage).
4744 18. Named domain lists were not supported in the hosts_treat_as_local option.
4745 An entry such as +xxxx was not recognized, and was treated as a literal
4748 19. Ensure that header lines added by a DATA ACL are included in the reject log
4749 if the ACL subsequently rejects the message.
4751 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4752 MD5 (which is deprecated).
4754 21. When testing a filter file using -bf, Exim was writing a message when it
4755 took the sender from a "From " line in the message, but it was not doing so
4756 when it took $return_path from a Return-Path: header line. It now does.
4758 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4759 with a valid header line field name (a series of printing characters
4760 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4762 23. Changed "disc" in the source to "disk" to conform to the documentation and
4763 the book and for uniformity.
4765 24. Ignore Sendmail's -Ooption=value command line item.
4767 25. When execve() failed while trying to run a command in a pipe transport,
4768 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4769 could be confused with a return value of 69 from the command itself. This
4770 has been changed to 127, the value the shell returns if it is asked to run
4771 a non-existent command. The wording for the related log line suggests a
4772 non-existent command as the problem.
4774 26. If received_header_text expands to an empty string, do not add a Received:
4775 header line to the message. (Well, it adds a token one on the spool, but
4776 marks it "old" so that it doesn't get used or transmitted.)
4778 27. Installed eximstats 1.28 (addition of -nt option).
4780 28. There was no check for failure on the call to getsockname() in the daemon
4781 code. This can fail if there is a shortage of resources on the system, with
4782 ENOMEM, for example. A temporary error is now given on failure.
4784 29. Contrary to the C standard, it seems that in some environments, the
4785 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4786 program. Exim now does this explicitly; it affects the formatting of
4787 timestamps using strftime().
4789 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4790 complaints. I've now initialized all the variables, to avoid this.
4792 32. Header lines added by a system filter were not being "seen" during
4793 transport-time rewrites.
4795 33. The info_callback() function passed to OpenSSL is set up with type void
4796 (*)(SSL *, int, int), as described somewhere. However, when calling the
4797 function (actually a macro) that sets it up, the type void(*)() is
4798 expected. I've put in a cast to prevent warnings from picky compilers.
4800 34. If a DNS black list lookup found a CNAME record, but there were no A
4801 records associated with the domain it pointed at, Exim crashed.
4803 35. If a DNS black list lookup returned more than one A record, Exim ignored
4804 all but the first. It now scans all returned addresses if a particular IP
4805 value is being sought. In this situation, the contents of the
4806 $dnslist_value variable are a list of all the addresses, separated by a
4809 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4810 to accept a host name and all its aliases if the forward lookup for any of
4811 them yielded the IP address of the incoming connection. Now it accepts only
4812 those names whose forward lookup yields the correct IP address. Any other
4813 names are discarded. This closes a loophole whereby a rogue DNS
4814 administrator could create reverse DNS records to break through a
4815 wildcarded host restriction in an ACL.
4817 37. If a user filter or a system filter that ran in a subprocess used any of
4818 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4819 the wrong values were passed to the pipe command ($thisaddress had the
4820 value of $0, $0 had the value of $1, etc). This bug was introduced by
4821 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4823 38. Improved the line breaking for long SMTP error messages from ACLs.
4824 Previously, if there was no break point between 40 and 75 characters, Exim
4825 left the rest of the message alone. Two changes have been made: (a) I've
4826 reduced the minimum length to 35 characters; (b) if it can't find a break
4827 point between 35 and 75 characters, it looks ahead and uses the first one
4828 that it finds. This may give the occasional overlong line, but at least the
4829 remaining text gets split now.
4831 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4832 file descriptors might be low, and that setting 1000 would always raise it.
4833 It turns out that in some environments, the limit is already over 1000 and
4834 that lowering it causes trouble. So now Exim takes care not to decrease it.
4836 40. When delivering a message, the value of $return_path is set to $sender_
4837 address at the start of routing (routers may change the value). By an
4838 oversight, this default was not being set up when an address was tested by
4839 -bt or -bv, which affected the outcome if any router or filter referred to
4842 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4843 log only when "message" or "log_message" are set. However, if one of the
4844 conditions was an address verification, or a call to a nested ACL, the
4845 messages generated by the underlying test were being passed through. This
4846 no longer happens. The underlying message is available in $acl_verify_
4847 message for both "message" and "log_message" expansions, so it can be
4848 passed through if needed.
4850 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4851 new expansion $bh_ to give the encoded byte string without charset
4852 translation. Translation happens only if iconv() is available; HAVE_ICONV
4853 indicates this at build time. HEADERS_CHARSET gives the charset to
4854 translate to; headers_charset can change it in the configuration, and
4855 "headers charset" can change it in an individual filter file.
4857 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4858 that creates RFC 2047 encoded "words" labels them as that charset instead
4859 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4860 expansion operator; (ii) when Exim creates a From: line for a local
4861 message; (iii) when a header line is rewritten to include a "phrase" part.
4863 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4864 buggy, causing it to skip the first lines of messages whose message ID
4865 ended in 'D'. This would not have bitten before Exim release 4.14, because
4866 message IDs were unlikely to end in 'D' before then. The effect was to have
4867 incorrect size information for certain domains.
4869 45. #include "config.h" was missing at the start of the crypt16.c module. This
4870 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4873 46. If there was a timeout during a "random" callout check, Exim treated it as
4874 a failure of the random address, and carried on sending RSET and the real
4875 address. If the delay was just some slowness somewhere, the response to the
4876 original RCPT would be taken as a response to RSET and so on, causing
4877 mayhem of various kinds.
4879 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4880 when I implemented it. It didn't allow for the fact that some option values
4881 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4882 the right test for positive values.
4884 48. Domain names in DNS records are case-independent. Exim always looks them up
4885 in lower case. Some resolvers return domain names in exactly the case they
4886 appear in the zone file, that is, they may contain uppercase letters. Not
4887 all resolvers do this - some return always lower case. Exim was treating a
4888 change of case by a resolver as a change of domain, similar to a widening
4889 of a domain abbreviation. This triggered its re-routing code and so it was
4890 trying to route what was effectively the same domain again. This normally
4891 caused routing to fail (because the router wouldn't handle the domain
4892 twice). Now Exim checks for this case specially, and just changes the
4893 casing of the domain that it ultimately uses when it transmits the message
4896 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4899 50. If a filter generated a file delivery with a non-absolute name (possible if
4900 no home directory exists for the router), the forbid_file option was not
4903 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4904 the existing equality matching.
4906 52. Exim was using ints instead of ino_t variables in some places where it was
4907 dealing with inode numbers.
4909 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4910 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4911 called TMPDIR, and if it finds it is different, it changes its value.
4913 54. The smtp_printf() function is now made available to local_scan() so
4914 additional output lines can be written before returning. There is also an
4915 smtp_fflush() function to enable the detection of a dropped connection.
4916 The variables smtp_input and smtp_batched_input are exported to
4919 55. Changed the default runtime configuration: the message "Unknown user"
4920 has been removed from the ACL, and instead placed on the localuser router,
4921 using the cannot_route_message feature. This means that any verification
4922 failures that generate their own messages won't get overridden. Similarly,
4923 the "Unrouteable address" message that was in the ACL for unverifiable
4924 relay addresses has also been removed.
4926 56. Added hosts_avoid_esmtp to the smtp transport.
4928 57. The exicyclog script was not checking for the esoteric option
4929 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4930 will work only if exicyclog is run under the appropriate euid.
4932 58. Following a discussion on the list, the rules by which Exim recognises line
4933 endings on incoming messages have been changed. The -dropcr and drop_cr
4934 options are now no-ops, retained only for backwards compatibility. The
4935 following line terminators are recognized: LF CRLF CR. However, special
4936 processing applies to CR:
4938 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4939 nor a local message in the state where . is a terminator.
4941 (ii) If a bare CR is encountered in a header line, an extra space is added
4942 after the line terminator so as not to end the header. The reasoning
4943 behind this is that bare CRs in header lines are most likely either
4944 to be mistakes, or people trying to play silly games.
4946 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4947 was being incorrectly given as 18 bytes larger than it should have been.
4948 This is a VOB (very old bug).
4950 60. This may never have affected anything current, but just in case it has:
4951 When the local host is found other than at the start of a list of hosts,
4952 the local host, those with the same MX, and any that follow, are discarded.
4953 When the list in question was part of a longer list of hosts, the following
4954 hosts (not currently being processed) were also being discarded. This no
4955 longer happens. I'm not sure if this situation could ever has previously
4958 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4961 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4962 header. This is something that is recommended in a new Internet Draft, and
4963 is something that is documented as being done by Sendmail. There are two
4964 possible values. For messages generated by the autoreply transport, Exim
4967 Auto-Submitted: auto-replied
4969 whereas for all other generated messages (e.g. bounces) it adds
4971 Auto-Submitted: auto-generated
4973 63. The "personal" condition in filters now includes a test for the
4974 Auto-Submitted: header. If it contains the string "auto-" the message it
4975 not considered personal.
4977 64. Added rcpt_include_affixes as a generic transport option.
4979 65. Added queue_only_override (default true).
4981 66. Added the syslog_duplication option.
4983 67. If what should have been the first header line of a message consisted of
4984 a space followed by a colon, Exim was mis-interpreting it as a header line.
4985 It isn't of course - it is syntactically invalid and should therefore be
4986 treated as the start of the message body. The misbehaviour could have
4987 caused a number of strange effects, including loss of data in subsequent
4988 header lines, and spool format errors.
4990 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4991 client host had authenticated. This control can now be exercised by an ACL
4992 for more flexibility.
4994 69. By default, callouts do not happen when testing with -bh. There is now a
4995 variant, -bhc, which does actually run the callout code, including
4996 consulting and updating the callout cache.
4998 70. Added support for saslauthd authentication, courtesy of Alexander
5001 71. If statvfs() failed on the spool or log directories while checking their
5002 size for availability, Exim confusingly gave the error "space shortage".
5003 Furthermore, in debugging mode it crashed with a floating point exception.
5004 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5005 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5006 serious problem, Exim now writes to the main and panic logs when this
5007 happens, with details of the failure. It then refuses to accept the
5008 incoming message, giving the message "spool directory problem" or "log
5009 directory problem" with a 421 code for SMTP messages.
5011 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5012 0, 1, and 2 exist, because some OS complain for execs without them (see
5013 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5014 descriptors. However, the code omitted to check that the open succeeded,
5015 causing mysterious errors if for some reason the permissions on /dev/null
5016 got screwed. Now Exim writes a message to the main and panic logs, and
5017 bombs out if it can't open /dev/null.
5019 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5020 interact so that it is all more flexible. It is supposed to remain
5021 backwards compatible. Also added extra_local_interfaces.
5023 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5024 to bomb out with an assertion failure - to the client this appears as a
5025 connection drop. This problem occurs in the part of the code that was taken
5026 from the Samba project. Fortunately, the assertion is in a very simple
5027 function, so I have fixed this by reproducing the function inline in the
5028 one place where it is called, and arranging for authentication to fail
5029 instead of killing the process with assert().
5031 75. The SPA client code was not working when the server requested OEM rather
5032 than Unicode encoding.
5034 76. Added code to make require_files with a specific uid setting more usable in
5035 the case where statting the file as root fails - usually a non-root-mounted
5036 NFS file system. When this happens and the failure is EACCES, Exim now
5037 forks a subprocess and does the per-uid checking as the relevant uid.
5039 77. Added process_log_path.
5041 78. If log_file_path was not explicitly set, a setting of check_log_space or
5042 check_log_inodes was ignored.
5044 79. If a space check for the spool or log partitions fails, the incident is now
5045 logged. Of course, in the latter case the data may get lost...
5047 80. Added the %p formatting code to string_format() so that it can be used to
5048 print addresses in debug_print(). Adjusted all the address printing in the
5049 debugging in store.c to use %p rather than %d.
5051 81. There was a concern that a line of code in smtp_in.c could overflow a
5052 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5053 initially expressed, the concern was not well-founded, because trailing
5054 spaces are removed early. However, if the trailing spaces were followed by
5055 a NULL, they did not get removed, so the overflow was possible. Two fixes
5058 (a) I re-wrote the offending code in a cleaner fashion.
5059 (b) If an incoming SMTP command contains a NULL character, it is rejected
5062 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5063 runs initgroups(), so that if the Exim user is in any additional groups,
5064 they will be used during message reception.
5070 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob